/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2008-07-19 18:43:24 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080719184324-iwhoa5in75xa0u2u
* mandos-clients.conf ([foo]/dn, [foo]/password, [braxen_client]/dn,
                       [braxen_client]/password): Removed.
  ([foo]/fingerprint, [braxen_client]/fingerprint): New.
  ([foo]/checker): New.
  ([foo]/secfile): New.
  ([braxen_client]/secret): New.

* server.py: New "--debug" option to set debug flag.  Removed "cert",
             "key", "ca", "crl", and "cred" variables.  Added default
             value for "checker" config file setting.  Do not pass
             credentials to IPv6_TCPServer constructor.
  (debug): New global debug flag.  Used by most debugging output code.
  (Client.__init__): Keyword argument "dn" replaced by "fingerprint",
                     "password" renamed to "secret", and "passfile"
                     renamed to "secfile".  New keyword argument
                     "checker". All callers changed.
  (Client.dn): Removed.
  (Client.fingerprint): New.
  (Client.password): Renamed to "secret"; all users changed.
  (Client.passfile): Renamed to "secfile"; all users changed.
  (Client.timeout, Client.interval): Changed to be properties; now
                                     automatically updates the
                                     "_timeout_milliseconds" and
                                     "_interval_milliseconds" values.
  (Client.timeout_milliseconds): Renamed to "_timeout_milliseconds".
  (Client.interval_milliseconds): Renamed to "_interval_milliseconds".
  (Client.check_command): New.
  (Client.start_checker): Use the new "check_command" attribute.
  (peer_certificate, fingerprint): New functions.

  (tcp_handler.handle): Use ClientSession with empty credentials
                        object instead of ServerSession.  Set gnutls
                        priority string.  Do not verify peer.  Use
                        fingerprint instead of DN when searching for
                        clients.  Bug fix: Loop sending data so even large
                        secret data strings are sent.
  (IPv6_TCPServer.credentials): Removed.
  (if_nametoindex): Do not import ctypes since that is now imported
                    globally.

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1
#!/usr/bin/python
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
4
 
# Mandos server - give out binary blobs to connecting clients.
5
 
6
 
# This program is partly derived from an example program for an Avahi
7
 
# service publisher, downloaded from
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".
12
 
13
 
# Everything else is
14
 
# Copyright © 2008-2014 Teddy Hogeborn
15
 
# Copyright © 2008-2014 Björn Påhlsson
16
 
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
19
 
# the Free Software Foundation, either version 3 of the License, or
20
 
# (at your option) any later version.
21
 
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
24
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
 
#     GNU General Public License for more details.
26
 
27
 
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
31
 
# Contact the authors at <mandos@recompile.se>.
32
 
33
 
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
from future_builtins import *
38
 
 
39
 
import SocketServer as socketserver
 
2
 
 
3
from __future__ import division
 
4
 
 
5
import SocketServer
40
6
import socket
41
 
import argparse
 
7
import select
 
8
from optparse import OptionParser
42
9
import datetime
43
10
import errno
44
11
import gnutls.crypto
47
14
import gnutls.library.functions
48
15
import gnutls.library.constants
49
16
import gnutls.library.types
50
 
import ConfigParser as configparser
 
17
import ConfigParser
51
18
import sys
52
19
import re
53
20
import os
54
21
import signal
 
22
from sets import Set
55
23
import subprocess
56
 
import atexit
57
 
import stat
58
 
import logging
59
 
import logging.handlers
60
 
import pwd
61
 
import contextlib
62
 
import struct
63
 
import fcntl
64
 
import functools
65
 
import cPickle as pickle
66
 
import multiprocessing
67
 
import types
68
 
import binascii
69
 
import tempfile
70
 
import itertools
71
 
import collections
72
24
 
73
25
import dbus
74
 
import dbus.service
75
26
import gobject
76
27
import avahi
77
28
from dbus.mainloop.glib import DBusGMainLoop
78
29
import ctypes
79
 
import ctypes.util
80
 
import xml.dom.minidom
81
 
import inspect
82
 
 
83
 
try:
84
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
 
except AttributeError:
86
 
    try:
87
 
        from IN import SO_BINDTODEVICE
88
 
    except ImportError:
89
 
        SO_BINDTODEVICE = None
90
 
 
91
 
version = "1.6.5"
92
 
stored_state_file = "clients.pickle"
93
 
 
94
 
logger = logging.getLogger()
95
 
syslogger = None
96
 
 
97
 
try:
98
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
99
 
                      (ctypes.util.find_library("c"))
100
 
                      .if_nametoindex)
101
 
except (OSError, AttributeError):
102
 
    def if_nametoindex(interface):
103
 
        "Get an interface index the hard way, i.e. using fcntl()"
104
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
105
 
        with contextlib.closing(socket.socket()) as s:
106
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
 
                                struct.pack(str("16s16x"),
108
 
                                            interface))
109
 
        interface_index = struct.unpack(str("I"),
110
 
                                        ifreq[16:20])[0]
111
 
        return interface_index
112
 
 
113
 
 
114
 
def initlogger(debug, level=logging.WARNING):
115
 
    """init logger and add loglevel"""
116
 
    
117
 
    global syslogger
118
 
    syslogger = (logging.handlers.SysLogHandler
119
 
                 (facility =
120
 
                  logging.handlers.SysLogHandler.LOG_DAEMON,
121
 
                  address = str("/dev/log")))
122
 
    syslogger.setFormatter(logging.Formatter
123
 
                           ('Mandos [%(process)d]: %(levelname)s:'
124
 
                            ' %(message)s'))
125
 
    logger.addHandler(syslogger)
126
 
    
127
 
    if debug:
128
 
        console = logging.StreamHandler()
129
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
130
 
                                               ' [%(process)d]:'
131
 
                                               ' %(levelname)s:'
132
 
                                               ' %(message)s'))
133
 
        logger.addHandler(console)
134
 
    logger.setLevel(level)
135
 
 
136
 
 
137
 
class PGPError(Exception):
138
 
    """Exception if encryption/decryption fails"""
139
 
    pass
140
 
 
141
 
 
142
 
class PGPEngine(object):
143
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
144
 
    def __init__(self):
145
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
146
 
        self.gnupgargs = ['--batch',
147
 
                          '--home', self.tempdir,
148
 
                          '--force-mdc',
149
 
                          '--quiet',
150
 
                          '--no-use-agent']
151
 
    
152
 
    def __enter__(self):
153
 
        return self
154
 
    
155
 
    def __exit__(self, exc_type, exc_value, traceback):
156
 
        self._cleanup()
157
 
        return False
158
 
    
159
 
    def __del__(self):
160
 
        self._cleanup()
161
 
    
162
 
    def _cleanup(self):
163
 
        if self.tempdir is not None:
164
 
            # Delete contents of tempdir
165
 
            for root, dirs, files in os.walk(self.tempdir,
166
 
                                             topdown = False):
167
 
                for filename in files:
168
 
                    os.remove(os.path.join(root, filename))
169
 
                for dirname in dirs:
170
 
                    os.rmdir(os.path.join(root, dirname))
171
 
            # Remove tempdir
172
 
            os.rmdir(self.tempdir)
173
 
            self.tempdir = None
174
 
    
175
 
    def password_encode(self, password):
176
 
        # Passphrase can not be empty and can not contain newlines or
177
 
        # NUL bytes.  So we prefix it and hex encode it.
178
 
        encoded = b"mandos" + binascii.hexlify(password)
179
 
        if len(encoded) > 2048:
180
 
            # GnuPG can't handle long passwords, so encode differently
181
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
182
 
                       .replace(b"\n", b"\\n")
183
 
                       .replace(b"\0", b"\\x00"))
184
 
        return encoded
185
 
    
186
 
    def encrypt(self, data, password):
187
 
        passphrase = self.password_encode(password)
188
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
189
 
                                         ) as passfile:
190
 
            passfile.write(passphrase)
191
 
            passfile.flush()
192
 
            proc = subprocess.Popen(['gpg', '--symmetric',
193
 
                                     '--passphrase-file',
194
 
                                     passfile.name]
195
 
                                    + self.gnupgargs,
196
 
                                    stdin = subprocess.PIPE,
197
 
                                    stdout = subprocess.PIPE,
198
 
                                    stderr = subprocess.PIPE)
199
 
            ciphertext, err = proc.communicate(input = data)
200
 
        if proc.returncode != 0:
201
 
            raise PGPError(err)
202
 
        return ciphertext
203
 
    
204
 
    def decrypt(self, data, password):
205
 
        passphrase = self.password_encode(password)
206
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
207
 
                                         ) as passfile:
208
 
            passfile.write(passphrase)
209
 
            passfile.flush()
210
 
            proc = subprocess.Popen(['gpg', '--decrypt',
211
 
                                     '--passphrase-file',
212
 
                                     passfile.name]
213
 
                                    + self.gnupgargs,
214
 
                                    stdin = subprocess.PIPE,
215
 
                                    stdout = subprocess.PIPE,
216
 
                                    stderr = subprocess.PIPE)
217
 
            decrypted_plaintext, err = proc.communicate(input
218
 
                                                        = data)
219
 
        if proc.returncode != 0:
220
 
            raise PGPError(err)
221
 
        return decrypted_plaintext
222
 
 
223
 
 
224
 
class AvahiError(Exception):
225
 
    def __init__(self, value, *args, **kwargs):
226
 
        self.value = value
227
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
228
 
    def __unicode__(self):
229
 
        return unicode(repr(self.value))
230
 
 
231
 
class AvahiServiceError(AvahiError):
232
 
    pass
233
 
 
234
 
class AvahiGroupError(AvahiError):
235
 
    pass
236
 
 
237
 
 
238
 
class AvahiService(object):
239
 
    """An Avahi (Zeroconf) service.
240
 
    
241
 
    Attributes:
242
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
243
 
               Used to optionally bind to the specified interface.
244
 
    name: string; Example: 'Mandos'
245
 
    type: string; Example: '_mandos._tcp'.
246
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
247
 
    port: integer; what port to announce
248
 
    TXT: list of strings; TXT record for the service
249
 
    domain: string; Domain to publish on, default to .local if empty.
250
 
    host: string; Host to publish records for, default is localhost
251
 
    max_renames: integer; maximum number of renames
252
 
    rename_count: integer; counter so we only rename after collisions
253
 
                  a sensible number of times
254
 
    group: D-Bus Entry Group
255
 
    server: D-Bus Server
256
 
    bus: dbus.SystemBus()
257
 
    """
258
 
    
259
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
 
                 servicetype = None, port = None, TXT = None,
261
 
                 domain = "", host = "", max_renames = 32768,
262
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
263
 
        self.interface = interface
264
 
        self.name = name
265
 
        self.type = servicetype
266
 
        self.port = port
267
 
        self.TXT = TXT if TXT is not None else []
268
 
        self.domain = domain
269
 
        self.host = host
270
 
        self.rename_count = 0
271
 
        self.max_renames = max_renames
272
 
        self.protocol = protocol
273
 
        self.group = None       # our entry group
274
 
        self.server = None
275
 
        self.bus = bus
276
 
        self.entry_group_state_changed_match = None
277
 
    
278
 
    def rename(self):
279
 
        """Derived from the Avahi example code"""
280
 
        if self.rename_count >= self.max_renames:
281
 
            logger.critical("No suitable Zeroconf service name found"
282
 
                            " after %i retries, exiting.",
283
 
                            self.rename_count)
284
 
            raise AvahiServiceError("Too many renames")
285
 
        self.name = unicode(self.server
286
 
                            .GetAlternativeServiceName(self.name))
287
 
        logger.info("Changing Zeroconf service name to %r ...",
288
 
                    self.name)
289
 
        self.remove()
290
 
        try:
291
 
            self.add()
292
 
        except dbus.exceptions.DBusException as error:
293
 
            logger.critical("D-Bus Exception", exc_info=error)
294
 
            self.cleanup()
295
 
            os._exit(1)
296
 
        self.rename_count += 1
297
 
    
298
 
    def remove(self):
299
 
        """Derived from the Avahi example code"""
300
 
        if self.entry_group_state_changed_match is not None:
301
 
            self.entry_group_state_changed_match.remove()
302
 
            self.entry_group_state_changed_match = None
303
 
        if self.group is not None:
304
 
            self.group.Reset()
305
 
    
306
 
    def add(self):
307
 
        """Derived from the Avahi example code"""
308
 
        self.remove()
309
 
        if self.group is None:
310
 
            self.group = dbus.Interface(
311
 
                self.bus.get_object(avahi.DBUS_NAME,
312
 
                                    self.server.EntryGroupNew()),
313
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
 
        self.entry_group_state_changed_match = (
315
 
            self.group.connect_to_signal(
316
 
                'StateChanged', self.entry_group_state_changed))
317
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
 
                     self.name, self.type)
319
 
        self.group.AddService(
320
 
            self.interface,
321
 
            self.protocol,
322
 
            dbus.UInt32(0),     # flags
323
 
            self.name, self.type,
324
 
            self.domain, self.host,
325
 
            dbus.UInt16(self.port),
326
 
            avahi.string_array_to_txt_array(self.TXT))
327
 
        self.group.Commit()
328
 
    
329
 
    def entry_group_state_changed(self, state, error):
330
 
        """Derived from the Avahi example code"""
331
 
        logger.debug("Avahi entry group state change: %i", state)
332
 
        
333
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
334
 
            logger.debug("Zeroconf service established.")
335
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
336
 
            logger.info("Zeroconf service name collision.")
337
 
            self.rename()
338
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
339
 
            logger.critical("Avahi: Error in group state changed %s",
340
 
                            unicode(error))
341
 
            raise AvahiGroupError("State changed: {0!s}"
342
 
                                  .format(error))
343
 
    
344
 
    def cleanup(self):
345
 
        """Derived from the Avahi example code"""
346
 
        if self.group is not None:
347
 
            try:
348
 
                self.group.Free()
349
 
            except (dbus.exceptions.UnknownMethodException,
350
 
                    dbus.exceptions.DBusException):
351
 
                pass
352
 
            self.group = None
353
 
        self.remove()
354
 
    
355
 
    def server_state_changed(self, state, error=None):
356
 
        """Derived from the Avahi example code"""
357
 
        logger.debug("Avahi server state change: %i", state)
358
 
        bad_states = { avahi.SERVER_INVALID:
359
 
                           "Zeroconf server invalid",
360
 
                       avahi.SERVER_REGISTERING: None,
361
 
                       avahi.SERVER_COLLISION:
362
 
                           "Zeroconf server name collision",
363
 
                       avahi.SERVER_FAILURE:
364
 
                           "Zeroconf server failure" }
365
 
        if state in bad_states:
366
 
            if bad_states[state] is not None:
367
 
                if error is None:
368
 
                    logger.error(bad_states[state])
369
 
                else:
370
 
                    logger.error(bad_states[state] + ": %r", error)
371
 
            self.cleanup()
372
 
        elif state == avahi.SERVER_RUNNING:
373
 
            self.add()
374
 
        else:
375
 
            if error is None:
376
 
                logger.debug("Unknown state: %r", state)
377
 
            else:
378
 
                logger.debug("Unknown state: %r: %r", state, error)
379
 
    
380
 
    def activate(self):
381
 
        """Derived from the Avahi example code"""
382
 
        if self.server is None:
383
 
            self.server = dbus.Interface(
384
 
                self.bus.get_object(avahi.DBUS_NAME,
385
 
                                    avahi.DBUS_PATH_SERVER,
386
 
                                    follow_name_owner_changes=True),
387
 
                avahi.DBUS_INTERFACE_SERVER)
388
 
        self.server.connect_to_signal("StateChanged",
389
 
                                 self.server_state_changed)
390
 
        self.server_state_changed(self.server.GetState())
391
 
 
392
 
 
393
 
class AvahiServiceToSyslog(AvahiService):
394
 
    def rename(self):
395
 
        """Add the new name to the syslog messages"""
396
 
        ret = AvahiService.rename(self)
397
 
        syslogger.setFormatter(logging.Formatter
398
 
                               ('Mandos ({0}) [%(process)d]:'
399
 
                                ' %(levelname)s: %(message)s'
400
 
                                .format(self.name)))
401
 
        return ret
402
 
 
403
 
 
404
 
def timedelta_to_milliseconds(td):
405
 
    "Convert a datetime.timedelta() to milliseconds"
406
 
    return ((td.days * 24 * 60 * 60 * 1000)
407
 
            + (td.seconds * 1000)
408
 
            + (td.microseconds // 1000))
 
30
 
 
31
# This variable is used to optionally bind to a specified interface.
 
32
# It is a global variable to fit in with the other variables from the
 
33
# Avahi server example code.
 
34
serviceInterface = avahi.IF_UNSPEC
 
35
# From the Avahi server example code:
 
36
serviceName = "Mandos"
 
37
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
 
38
servicePort = None                      # Not known at startup
 
39
serviceTXT = []                         # TXT record for the service
 
40
domain = ""                  # Domain to publish on, default to .local
 
41
host = ""          # Host to publish records for, default to localhost
 
42
group = None #our entry group
 
43
rename_count = 12       # Counter so we only rename after collisions a
 
44
                        # sensible number of times
 
45
# End of Avahi example code
409
46
 
410
47
 
411
48
class Client(object):
412
49
    """A representation of a client host served by this server.
413
 
    
414
50
    Attributes:
415
 
    approved:   bool(); 'None' if not yet approved/disapproved
416
 
    approval_delay: datetime.timedelta(); Time to wait for approval
417
 
    approval_duration: datetime.timedelta(); Duration of one approval
418
 
    checker:    subprocess.Popen(); a running checker process used
419
 
                                    to see if the client lives.
420
 
                                    'None' if no process is running.
421
 
    checker_callback_tag: a gobject event source tag, or None
422
 
    checker_command: string; External command which is run to check
423
 
                     if client lives.  %() expansions are done at
 
51
    name:      string; from the config file, used in log messages
 
52
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
53
                 uniquely identify the client
 
54
    secret:    bytestring; sent verbatim (over TLS) to client
 
55
    fqdn:      string (FQDN); available for use by the checker command
 
56
    created:   datetime.datetime()
 
57
    last_seen: datetime.datetime() or None if not yet seen
 
58
    timeout:   datetime.timedelta(); How long from last_seen until
 
59
                                     this client is invalid
 
60
    interval:  datetime.timedelta(); How often to start a new checker
 
61
    stop_hook: If set, called by stop() as stop_hook(self)
 
62
    checker:   subprocess.Popen(); a running checker process used
 
63
                                   to see if the client lives.
 
64
                                   Is None if no process is running.
 
65
    checker_initiator_tag: a gobject event source tag, or None
 
66
    stop_initiator_tag:    - '' -
 
67
    checker_callback_tag:  - '' -
 
68
    checker_command: string; External command which is run to check if
 
69
                     client lives.  %()s expansions are done at
424
70
                     runtime with vars(self) as dict, so that for
425
71
                     instance %(name)s can be used in the command.
426
 
    checker_initiator_tag: a gobject event source tag, or None
427
 
    created:    datetime.datetime(); (UTC) object creation
428
 
    client_structure: Object describing what attributes a client has
429
 
                      and is used for storing the client at exit
430
 
    current_checker_command: string; current running checker_command
431
 
    disable_initiator_tag: a gobject event source tag, or None
432
 
    enabled:    bool()
433
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
434
 
                 uniquely identify the client
435
 
    host:       string; available for use by the checker command
436
 
    interval:   datetime.timedelta(); How often to start a new checker
437
 
    last_approval_request: datetime.datetime(); (UTC) or None
438
 
    last_checked_ok: datetime.datetime(); (UTC) or None
439
 
    last_checker_status: integer between 0 and 255 reflecting exit
440
 
                         status of last checker. -1 reflects crashed
441
 
                         checker, -2 means no checker completed yet.
442
 
    last_enabled: datetime.datetime(); (UTC) or None
443
 
    name:       string; from the config file, used in log messages and
444
 
                        D-Bus identifiers
445
 
    secret:     bytestring; sent verbatim (over TLS) to client
446
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
447
 
                                      until this client is disabled
448
 
    extended_timeout:   extra long timeout when secret has been sent
449
 
    runtime_expansions: Allowed attributes for runtime expansion.
450
 
    expires:    datetime.datetime(); time (UTC) when a client will be
451
 
                disabled, or None
452
 
    server_settings: The server_settings dict from main()
 
72
    Private attibutes:
 
73
    _timeout: Real variable for 'timeout'
 
74
    _interval: Real variable for 'interval'
 
75
    _timeout_milliseconds: Used by gobject.timeout_add()
 
76
    _interval_milliseconds: - '' -
453
77
    """
454
 
    
455
 
    runtime_expansions = ("approval_delay", "approval_duration",
456
 
                          "created", "enabled", "expires",
457
 
                          "fingerprint", "host", "interval",
458
 
                          "last_approval_request", "last_checked_ok",
459
 
                          "last_enabled", "name", "timeout")
460
 
    client_defaults = { "timeout": "PT5M",
461
 
                        "extended_timeout": "PT15M",
462
 
                        "interval": "PT2M",
463
 
                        "checker": "fping -q -- %%(host)s",
464
 
                        "host": "",
465
 
                        "approval_delay": "PT0S",
466
 
                        "approval_duration": "PT1S",
467
 
                        "approved_by_default": "True",
468
 
                        "enabled": "True",
469
 
                        }
470
 
    
471
 
    def timeout_milliseconds(self):
472
 
        "Return the 'timeout' attribute in milliseconds"
473
 
        return timedelta_to_milliseconds(self.timeout)
474
 
    
475
 
    def extended_timeout_milliseconds(self):
476
 
        "Return the 'extended_timeout' attribute in milliseconds"
477
 
        return timedelta_to_milliseconds(self.extended_timeout)
478
 
    
479
 
    def interval_milliseconds(self):
480
 
        "Return the 'interval' attribute in milliseconds"
481
 
        return timedelta_to_milliseconds(self.interval)
482
 
    
483
 
    def approval_delay_milliseconds(self):
484
 
        return timedelta_to_milliseconds(self.approval_delay)
485
 
    
486
 
    @staticmethod
487
 
    def config_parser(config):
488
 
        """Construct a new dict of client settings of this form:
489
 
        { client_name: {setting_name: value, ...}, ...}
490
 
        with exceptions for any special settings as defined above.
491
 
        NOTE: Must be a pure function. Must return the same result
492
 
        value given the same arguments.
493
 
        """
494
 
        settings = {}
495
 
        for client_name in config.sections():
496
 
            section = dict(config.items(client_name))
497
 
            client = settings[client_name] = {}
498
 
            
499
 
            client["host"] = section["host"]
500
 
            # Reformat values from string types to Python types
501
 
            client["approved_by_default"] = config.getboolean(
502
 
                client_name, "approved_by_default")
503
 
            client["enabled"] = config.getboolean(client_name,
504
 
                                                  "enabled")
505
 
            
506
 
            client["fingerprint"] = (section["fingerprint"].upper()
507
 
                                     .replace(" ", ""))
508
 
            if "secret" in section:
509
 
                client["secret"] = section["secret"].decode("base64")
510
 
            elif "secfile" in section:
511
 
                with open(os.path.expanduser(os.path.expandvars
512
 
                                             (section["secfile"])),
513
 
                          "rb") as secfile:
514
 
                    client["secret"] = secfile.read()
515
 
            else:
516
 
                raise TypeError("No secret or secfile for section {0}"
517
 
                                .format(section))
518
 
            client["timeout"] = string_to_delta(section["timeout"])
519
 
            client["extended_timeout"] = string_to_delta(
520
 
                section["extended_timeout"])
521
 
            client["interval"] = string_to_delta(section["interval"])
522
 
            client["approval_delay"] = string_to_delta(
523
 
                section["approval_delay"])
524
 
            client["approval_duration"] = string_to_delta(
525
 
                section["approval_duration"])
526
 
            client["checker_command"] = section["checker"]
527
 
            client["last_approval_request"] = None
528
 
            client["last_checked_ok"] = None
529
 
            client["last_checker_status"] = -2
530
 
        
531
 
        return settings
532
 
    
533
 
    def __init__(self, settings, name = None, server_settings=None):
 
78
    def _set_timeout(self, timeout):
 
79
        "Setter function for 'timeout' attribute"
 
80
        self._timeout = timeout
 
81
        self._timeout_milliseconds = ((self.timeout.days
 
82
                                       * 24 * 60 * 60 * 1000)
 
83
                                      + (self.timeout.seconds * 1000)
 
84
                                      + (self.timeout.microseconds
 
85
                                         // 1000))
 
86
    timeout = property(lambda self: self._timeout,
 
87
                       _set_timeout)
 
88
    del _set_timeout
 
89
    def _set_interval(self, interval):
 
90
        "Setter function for 'interval' attribute"
 
91
        self._interval = interval
 
92
        self._interval_milliseconds = ((self.interval.days
 
93
                                        * 24 * 60 * 60 * 1000)
 
94
                                       + (self.interval.seconds
 
95
                                          * 1000)
 
96
                                       + (self.interval.microseconds
 
97
                                          // 1000))
 
98
    interval = property(lambda self: self._interval,
 
99
                        _set_interval)
 
100
    del _set_interval
 
101
    def __init__(self, name=None, options=None, stop_hook=None,
 
102
                 fingerprint=None, secret=None, secfile=None, fqdn=None,
 
103
                 timeout=None, interval=-1, checker=None):
534
104
        self.name = name
535
 
        if server_settings is None:
536
 
            server_settings = {}
537
 
        self.server_settings = server_settings
538
 
        # adding all client settings
539
 
        for setting, value in settings.iteritems():
540
 
            setattr(self, setting, value)
541
 
        
542
 
        if self.enabled:
543
 
            if not hasattr(self, "last_enabled"):
544
 
                self.last_enabled = datetime.datetime.utcnow()
545
 
            if not hasattr(self, "expires"):
546
 
                self.expires = (datetime.datetime.utcnow()
547
 
                                + self.timeout)
548
 
        else:
549
 
            self.last_enabled = None
550
 
            self.expires = None
551
 
        
552
 
        logger.debug("Creating client %r", self.name)
553
 
        # Uppercase and remove spaces from fingerprint for later
554
 
        # comparison purposes with return value from the fingerprint()
555
 
        # function
556
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
557
 
        self.created = settings.get("created",
558
 
                                    datetime.datetime.utcnow())
559
 
        
560
 
        # attributes specific for this server instance
 
105
        # Uppercase and remove spaces from fingerprint
 
106
        # for later comparison purposes with return value of
 
107
        # the fingerprint() function
 
108
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
 
109
        if secret:
 
110
            self.secret = secret.decode(u"base64")
 
111
        elif secfile:
 
112
            sf = open(secfile)
 
113
            self.secret = sf.read()
 
114
            sf.close()
 
115
        else:
 
116
            raise RuntimeError(u"No secret or secfile for client %s"
 
117
                               % self.name)
 
118
        self.fqdn = fqdn                # string
 
119
        self.created = datetime.datetime.now()
 
120
        self.last_seen = None
 
121
        if timeout is None:
 
122
            timeout = options.timeout
 
123
        self.timeout = timeout
 
124
        if interval == -1:
 
125
            interval = options.interval
 
126
        else:
 
127
            interval = string_to_delta(interval)
 
128
        self.interval = interval
 
129
        self.stop_hook = stop_hook
561
130
        self.checker = None
562
131
        self.checker_initiator_tag = None
563
 
        self.disable_initiator_tag = None
 
132
        self.stop_initiator_tag = None
564
133
        self.checker_callback_tag = None
565
 
        self.current_checker_command = None
566
 
        self.approved = None
567
 
        self.approvals_pending = 0
568
 
        self.changedstate = (multiprocessing_manager
569
 
                             .Condition(multiprocessing_manager
570
 
                                        .Lock()))
571
 
        self.client_structure = [attr for attr in
572
 
                                 self.__dict__.iterkeys()
573
 
                                 if not attr.startswith("_")]
574
 
        self.client_structure.append("client_structure")
575
 
        
576
 
        for name, t in inspect.getmembers(type(self),
577
 
                                          lambda obj:
578
 
                                              isinstance(obj,
579
 
                                                         property)):
580
 
            if not name.startswith("_"):
581
 
                self.client_structure.append(name)
582
 
    
583
 
    # Send notice to process children that client state has changed
584
 
    def send_changedstate(self):
585
 
        with self.changedstate:
586
 
            self.changedstate.notify_all()
587
 
    
588
 
    def enable(self):
589
 
        """Start this client's checker and timeout hooks"""
590
 
        if getattr(self, "enabled", False):
591
 
            # Already enabled
592
 
            return
593
 
        self.expires = datetime.datetime.utcnow() + self.timeout
594
 
        self.enabled = True
595
 
        self.last_enabled = datetime.datetime.utcnow()
596
 
        self.init_checker()
597
 
        self.send_changedstate()
598
 
    
599
 
    def disable(self, quiet=True):
600
 
        """Disable this client."""
601
 
        if not getattr(self, "enabled", False):
602
 
            return False
603
 
        if not quiet:
604
 
            logger.info("Disabling client %s", self.name)
605
 
        if getattr(self, "disable_initiator_tag", None) is not None:
606
 
            gobject.source_remove(self.disable_initiator_tag)
607
 
            self.disable_initiator_tag = None
608
 
        self.expires = None
609
 
        if getattr(self, "checker_initiator_tag", None) is not None:
610
 
            gobject.source_remove(self.checker_initiator_tag)
611
 
            self.checker_initiator_tag = None
612
 
        self.stop_checker()
613
 
        self.enabled = False
614
 
        if not quiet:
615
 
            self.send_changedstate()
616
 
        # Do not run this again if called by a gobject.timeout_add
617
 
        return False
618
 
    
619
 
    def __del__(self):
620
 
        self.disable()
621
 
    
622
 
    def init_checker(self):
 
134
        self.check_command = checker
 
135
    def start(self):
 
136
        """Start this clients checker and timeout hooks"""
623
137
        # Schedule a new checker to be started an 'interval' from now,
624
138
        # and every interval from then on.
625
 
        if self.checker_initiator_tag is not None:
626
 
            gobject.source_remove(self.checker_initiator_tag)
627
 
        self.checker_initiator_tag = (gobject.timeout_add
628
 
                                      (self.interval_milliseconds(),
629
 
                                       self.start_checker))
630
 
        # Schedule a disable() when 'timeout' has passed
631
 
        if self.disable_initiator_tag is not None:
632
 
            gobject.source_remove(self.disable_initiator_tag)
633
 
        self.disable_initiator_tag = (gobject.timeout_add
634
 
                                   (self.timeout_milliseconds(),
635
 
                                    self.disable))
 
139
        self.checker_initiator_tag = gobject.timeout_add\
 
140
                                     (self._interval_milliseconds,
 
141
                                      self.start_checker)
636
142
        # Also start a new checker *right now*.
637
143
        self.start_checker()
638
 
    
639
 
    def checker_callback(self, pid, condition, command):
 
144
        # Schedule a stop() when 'timeout' has passed
 
145
        self.stop_initiator_tag = gobject.timeout_add\
 
146
                                  (self._timeout_milliseconds,
 
147
                                   self.stop)
 
148
    def stop(self):
 
149
        """Stop this client.
 
150
        The possibility that this client might be restarted is left
 
151
        open, but not currently used."""
 
152
        if debug:
 
153
            sys.stderr.write(u"Stopping client %s\n" % self.name)
 
154
        self.secret = None
 
155
        if self.stop_initiator_tag:
 
156
            gobject.source_remove(self.stop_initiator_tag)
 
157
            self.stop_initiator_tag = None
 
158
        if self.checker_initiator_tag:
 
159
            gobject.source_remove(self.checker_initiator_tag)
 
160
            self.checker_initiator_tag = None
 
161
        self.stop_checker()
 
162
        if self.stop_hook:
 
163
            self.stop_hook(self)
 
164
        # Do not run this again if called by a gobject.timeout_add
 
165
        return False
 
166
    def __del__(self):
 
167
        # Some code duplication here and in stop()
 
168
        if hasattr(self, "stop_initiator_tag") \
 
169
               and self.stop_initiator_tag:
 
170
            gobject.source_remove(self.stop_initiator_tag)
 
171
            self.stop_initiator_tag = None
 
172
        if hasattr(self, "checker_initiator_tag") \
 
173
               and self.checker_initiator_tag:
 
174
            gobject.source_remove(self.checker_initiator_tag)
 
175
            self.checker_initiator_tag = None
 
176
        self.stop_checker()
 
177
    def checker_callback(self, pid, condition):
640
178
        """The checker has completed, so take appropriate actions."""
 
179
        now = datetime.datetime.now()
 
180
        if os.WIFEXITED(condition) \
 
181
               and (os.WEXITSTATUS(condition) == 0):
 
182
            if debug:
 
183
                sys.stderr.write(u"Checker for %(name)s succeeded\n"
 
184
                                 % vars(self))
 
185
            self.last_seen = now
 
186
            gobject.source_remove(self.stop_initiator_tag)
 
187
            self.stop_initiator_tag = gobject.timeout_add\
 
188
                                      (self._timeout_milliseconds,
 
189
                                       self.stop)
 
190
        elif debug:
 
191
            if not os.WIFEXITED(condition):
 
192
                sys.stderr.write(u"Checker for %(name)s crashed?\n"
 
193
                                 % vars(self))
 
194
            else:
 
195
                sys.stderr.write(u"Checker for %(name)s failed\n"
 
196
                                 % vars(self))
 
197
        self.checker = None
641
198
        self.checker_callback_tag = None
642
 
        self.checker = None
643
 
        if os.WIFEXITED(condition):
644
 
            self.last_checker_status = os.WEXITSTATUS(condition)
645
 
            if self.last_checker_status == 0:
646
 
                logger.info("Checker for %(name)s succeeded",
647
 
                            vars(self))
648
 
                self.checked_ok()
649
 
            else:
650
 
                logger.info("Checker for %(name)s failed",
651
 
                            vars(self))
652
 
        else:
653
 
            self.last_checker_status = -1
654
 
            logger.warning("Checker for %(name)s crashed?",
655
 
                           vars(self))
656
 
    
657
 
    def checked_ok(self):
658
 
        """Assert that the client has been seen, alive and well."""
659
 
        self.last_checked_ok = datetime.datetime.utcnow()
660
 
        self.last_checker_status = 0
661
 
        self.bump_timeout()
662
 
    
663
 
    def bump_timeout(self, timeout=None):
664
 
        """Bump up the timeout for this client."""
665
 
        if timeout is None:
666
 
            timeout = self.timeout
667
 
        if self.disable_initiator_tag is not None:
668
 
            gobject.source_remove(self.disable_initiator_tag)
669
 
            self.disable_initiator_tag = None
670
 
        if getattr(self, "enabled", False):
671
 
            self.disable_initiator_tag = (gobject.timeout_add
672
 
                                          (timedelta_to_milliseconds
673
 
                                           (timeout), self.disable))
674
 
            self.expires = datetime.datetime.utcnow() + timeout
675
 
    
676
 
    def need_approval(self):
677
 
        self.last_approval_request = datetime.datetime.utcnow()
678
 
    
679
199
    def start_checker(self):
680
200
        """Start a new checker subprocess if one is not running.
681
 
        
682
201
        If a checker already exists, leave it running and do
683
202
        nothing."""
684
 
        # The reason for not killing a running checker is that if we
685
 
        # did that, and if a checker (for some reason) started running
686
 
        # slowly and taking more than 'interval' time, then the client
687
 
        # would inevitably timeout, since no checker would get a
688
 
        # chance to run to completion.  If we instead leave running
689
 
        # checkers alone, the checker would have to take more time
690
 
        # than 'timeout' for the client to be disabled, which is as it
691
 
        # should be.
692
 
        
693
 
        # If a checker exists, make sure it is not a zombie
694
 
        try:
695
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
696
 
        except AttributeError:
697
 
            pass
698
 
        except OSError as error:
699
 
            if error.errno != errno.ECHILD:
700
 
                raise
701
 
        else:
702
 
            if pid:
703
 
                logger.warning("Checker was a zombie")
704
 
                gobject.source_remove(self.checker_callback_tag)
705
 
                self.checker_callback(pid, status,
706
 
                                      self.current_checker_command)
707
 
        # Start a new checker if needed
708
203
        if self.checker is None:
709
 
            # Escape attributes for the shell
710
 
            escaped_attrs = dict(
711
 
                (attr, re.escape(unicode(getattr(self, attr))))
712
 
                for attr in
713
 
                self.runtime_expansions)
714
 
            try:
715
 
                command = self.checker_command % escaped_attrs
716
 
            except TypeError as error:
717
 
                logger.error('Could not format string "%s"',
718
 
                             self.checker_command, exc_info=error)
719
 
                return True # Try again later
720
 
            self.current_checker_command = command
721
 
            try:
722
 
                logger.info("Starting checker %r for %s",
723
 
                            command, self.name)
724
 
                # We don't need to redirect stdout and stderr, since
725
 
                # in normal mode, that is already done by daemon(),
726
 
                # and in debug mode we don't want to.  (Stdin is
727
 
                # always replaced by /dev/null.)
728
 
                # The exception is when not debugging but nevertheless
729
 
                # running in the foreground; use the previously
730
 
                # created wnull.
731
 
                popen_args = {}
732
 
                if (not self.server_settings["debug"]
733
 
                    and self.server_settings["foreground"]):
734
 
                    popen_args.update({"stdout": wnull,
735
 
                                       "stderr": wnull })
736
 
                self.checker = subprocess.Popen(command,
737
 
                                                close_fds=True,
738
 
                                                shell=True, cwd="/",
739
 
                                                **popen_args)
740
 
            except OSError as error:
741
 
                logger.error("Failed to start subprocess",
742
 
                             exc_info=error)
743
 
                return True
744
 
            self.checker_callback_tag = (gobject.child_watch_add
745
 
                                         (self.checker.pid,
746
 
                                          self.checker_callback,
747
 
                                          data=command))
748
 
            # The checker may have completed before the gobject
749
 
            # watch was added.  Check for this.
750
 
            try:
751
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
752
 
            except OSError as error:
753
 
                if error.errno == errno.ECHILD:
754
 
                    # This should never happen
755
 
                    logger.error("Child process vanished",
756
 
                                 exc_info=error)
757
 
                    return True
758
 
                raise
759
 
            if pid:
760
 
                gobject.source_remove(self.checker_callback_tag)
761
 
                self.checker_callback(pid, status, command)
 
204
            if debug:
 
205
                sys.stderr.write(u"Starting checker for %s\n"
 
206
                                 % self.name)
 
207
            try:
 
208
                command = self.check_command % self.fqdn
 
209
            except TypeError:
 
210
                escaped_attrs = dict((key, re.escape(str(val)))
 
211
                                     for key, val in
 
212
                                     vars(self).iteritems())
 
213
                command = self.check_command % escaped_attrs
 
214
            try:
 
215
                self.checker = subprocess.\
 
216
                               Popen(command,
 
217
                                     stdout=subprocess.PIPE,
 
218
                                     close_fds=True, shell=True,
 
219
                                     cwd="/")
 
220
                self.checker_callback_tag = gobject.\
 
221
                                            child_watch_add(self.checker.pid,
 
222
                                                            self.\
 
223
                                                            checker_callback)
 
224
            except subprocess.OSError, error:
 
225
                sys.stderr.write(u"Failed to start subprocess: %s\n"
 
226
                                 % error)
762
227
        # Re-run this periodically if run by gobject.timeout_add
763
228
        return True
764
 
    
765
229
    def stop_checker(self):
766
230
        """Force the checker process, if any, to stop."""
767
 
        if self.checker_callback_tag:
768
 
            gobject.source_remove(self.checker_callback_tag)
769
 
            self.checker_callback_tag = None
770
 
        if getattr(self, "checker", None) is None:
 
231
        if not hasattr(self, "checker") or self.checker is None:
771
232
            return
772
 
        logger.debug("Stopping checker for %(name)s", vars(self))
773
 
        try:
774
 
            self.checker.terminate()
775
 
            #time.sleep(0.5)
776
 
            #if self.checker.poll() is None:
777
 
            #    self.checker.kill()
778
 
        except OSError as error:
779
 
            if error.errno != errno.ESRCH: # No such process
780
 
                raise
781
 
        self.checker = None
782
 
 
783
 
 
784
 
def dbus_service_property(dbus_interface, signature="v",
785
 
                          access="readwrite", byte_arrays=False):
786
 
    """Decorators for marking methods of a DBusObjectWithProperties to
787
 
    become properties on the D-Bus.
788
 
    
789
 
    The decorated method will be called with no arguments by "Get"
790
 
    and with one argument by "Set".
791
 
    
792
 
    The parameters, where they are supported, are the same as
793
 
    dbus.service.method, except there is only "signature", since the
794
 
    type from Get() and the type sent to Set() is the same.
795
 
    """
796
 
    # Encoding deeply encoded byte arrays is not supported yet by the
797
 
    # "Set" method, so we fail early here:
798
 
    if byte_arrays and signature != "ay":
799
 
        raise ValueError("Byte arrays not supported for non-'ay'"
800
 
                         " signature {0!r}".format(signature))
801
 
    def decorator(func):
802
 
        func._dbus_is_property = True
803
 
        func._dbus_interface = dbus_interface
804
 
        func._dbus_signature = signature
805
 
        func._dbus_access = access
806
 
        func._dbus_name = func.__name__
807
 
        if func._dbus_name.endswith("_dbus_property"):
808
 
            func._dbus_name = func._dbus_name[:-14]
809
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
810
 
        return func
811
 
    return decorator
812
 
 
813
 
 
814
 
def dbus_interface_annotations(dbus_interface):
815
 
    """Decorator for marking functions returning interface annotations
816
 
    
817
 
    Usage:
818
 
    
819
 
    @dbus_interface_annotations("org.example.Interface")
820
 
    def _foo(self):  # Function name does not matter
821
 
        return {"org.freedesktop.DBus.Deprecated": "true",
822
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
823
 
                    "false"}
824
 
    """
825
 
    def decorator(func):
826
 
        func._dbus_is_interface = True
827
 
        func._dbus_interface = dbus_interface
828
 
        func._dbus_name = dbus_interface
829
 
        return func
830
 
    return decorator
831
 
 
832
 
 
833
 
def dbus_annotations(annotations):
834
 
    """Decorator to annotate D-Bus methods, signals or properties
835
 
    Usage:
836
 
    
837
 
    @dbus_service_property("org.example.Interface", signature="b",
838
 
                           access="r")
839
 
    @dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
840
 
                        "org.freedesktop.DBus.Property."
841
 
                        "EmitsChangedSignal": "false"})
842
 
    def Property_dbus_property(self):
843
 
        return dbus.Boolean(False)
844
 
    """
845
 
    def decorator(func):
846
 
        func._dbus_annotations = annotations
847
 
        return func
848
 
    return decorator
849
 
 
850
 
 
851
 
class DBusPropertyException(dbus.exceptions.DBusException):
852
 
    """A base class for D-Bus property-related exceptions
853
 
    """
854
 
    def __unicode__(self):
855
 
        return unicode(str(self))
856
 
 
857
 
 
858
 
class DBusPropertyAccessException(DBusPropertyException):
859
 
    """A property's access permissions disallows an operation.
860
 
    """
861
 
    pass
862
 
 
863
 
 
864
 
class DBusPropertyNotFound(DBusPropertyException):
865
 
    """An attempt was made to access a non-existing property.
866
 
    """
867
 
    pass
868
 
 
869
 
 
870
 
class DBusObjectWithProperties(dbus.service.Object):
871
 
    """A D-Bus object with properties.
872
 
    
873
 
    Classes inheriting from this can use the dbus_service_property
874
 
    decorator to expose methods as D-Bus properties.  It exposes the
875
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
876
 
    """
877
 
    
878
 
    @staticmethod
879
 
    def _is_dbus_thing(thing):
880
 
        """Returns a function testing if an attribute is a D-Bus thing
881
 
        
882
 
        If called like _is_dbus_thing("method") it returns a function
883
 
        suitable for use as predicate to inspect.getmembers().
884
 
        """
885
 
        return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
886
 
                                   False)
887
 
    
888
 
    def _get_all_dbus_things(self, thing):
889
 
        """Returns a generator of (name, attribute) pairs
890
 
        """
891
 
        return ((getattr(athing.__get__(self), "_dbus_name",
892
 
                         name),
893
 
                 athing.__get__(self))
894
 
                for cls in self.__class__.__mro__
895
 
                for name, athing in
896
 
                inspect.getmembers(cls,
897
 
                                   self._is_dbus_thing(thing)))
898
 
    
899
 
    def _get_dbus_property(self, interface_name, property_name):
900
 
        """Returns a bound method if one exists which is a D-Bus
901
 
        property with the specified name and interface.
902
 
        """
903
 
        for cls in  self.__class__.__mro__:
904
 
            for name, value in (inspect.getmembers
905
 
                                (cls,
906
 
                                 self._is_dbus_thing("property"))):
907
 
                if (value._dbus_name == property_name
908
 
                    and value._dbus_interface == interface_name):
909
 
                    return value.__get__(self)
910
 
        
911
 
        # No such property
912
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
913
 
                                   + interface_name + "."
914
 
                                   + property_name)
915
 
    
916
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
917
 
                         out_signature="v")
918
 
    def Get(self, interface_name, property_name):
919
 
        """Standard D-Bus property Get() method, see D-Bus standard.
920
 
        """
921
 
        prop = self._get_dbus_property(interface_name, property_name)
922
 
        if prop._dbus_access == "write":
923
 
            raise DBusPropertyAccessException(property_name)
924
 
        value = prop()
925
 
        if not hasattr(value, "variant_level"):
926
 
            return value
927
 
        return type(value)(value, variant_level=value.variant_level+1)
928
 
    
929
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
930
 
    def Set(self, interface_name, property_name, value):
931
 
        """Standard D-Bus property Set() method, see D-Bus standard.
932
 
        """
933
 
        prop = self._get_dbus_property(interface_name, property_name)
934
 
        if prop._dbus_access == "read":
935
 
            raise DBusPropertyAccessException(property_name)
936
 
        if prop._dbus_get_args_options["byte_arrays"]:
937
 
            # The byte_arrays option is not supported yet on
938
 
            # signatures other than "ay".
939
 
            if prop._dbus_signature != "ay":
940
 
                raise ValueError("Byte arrays not supported for non-"
941
 
                                 "'ay' signature {0!r}"
942
 
                                 .format(prop._dbus_signature))
943
 
            value = dbus.ByteArray(b''.join(chr(byte)
944
 
                                            for byte in value))
945
 
        prop(value)
946
 
    
947
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
948
 
                         out_signature="a{sv}")
949
 
    def GetAll(self, interface_name):
950
 
        """Standard D-Bus property GetAll() method, see D-Bus
951
 
        standard.
952
 
        
953
 
        Note: Will not include properties with access="write".
954
 
        """
955
 
        properties = {}
956
 
        for name, prop in self._get_all_dbus_things("property"):
957
 
            if (interface_name
958
 
                and interface_name != prop._dbus_interface):
959
 
                # Interface non-empty but did not match
960
 
                continue
961
 
            # Ignore write-only properties
962
 
            if prop._dbus_access == "write":
963
 
                continue
964
 
            value = prop()
965
 
            if not hasattr(value, "variant_level"):
966
 
                properties[name] = value
967
 
                continue
968
 
            properties[name] = type(value)(value, variant_level=
969
 
                                           value.variant_level+1)
970
 
        return dbus.Dictionary(properties, signature="sv")
971
 
    
972
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
973
 
                         out_signature="s",
974
 
                         path_keyword='object_path',
975
 
                         connection_keyword='connection')
976
 
    def Introspect(self, object_path, connection):
977
 
        """Overloading of standard D-Bus method.
978
 
        
979
 
        Inserts property tags and interface annotation tags.
980
 
        """
981
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
982
 
                                                   connection)
983
 
        try:
984
 
            document = xml.dom.minidom.parseString(xmlstring)
985
 
            def make_tag(document, name, prop):
986
 
                e = document.createElement("property")
987
 
                e.setAttribute("name", name)
988
 
                e.setAttribute("type", prop._dbus_signature)
989
 
                e.setAttribute("access", prop._dbus_access)
990
 
                return e
991
 
            for if_tag in document.getElementsByTagName("interface"):
992
 
                # Add property tags
993
 
                for tag in (make_tag(document, name, prop)
994
 
                            for name, prop
995
 
                            in self._get_all_dbus_things("property")
996
 
                            if prop._dbus_interface
997
 
                            == if_tag.getAttribute("name")):
998
 
                    if_tag.appendChild(tag)
999
 
                # Add annotation tags
1000
 
                for typ in ("method", "signal", "property"):
1001
 
                    for tag in if_tag.getElementsByTagName(typ):
1002
 
                        annots = dict()
1003
 
                        for name, prop in (self.
1004
 
                                           _get_all_dbus_things(typ)):
1005
 
                            if (name == tag.getAttribute("name")
1006
 
                                and prop._dbus_interface
1007
 
                                == if_tag.getAttribute("name")):
1008
 
                                annots.update(getattr
1009
 
                                              (prop,
1010
 
                                               "_dbus_annotations",
1011
 
                                               {}))
1012
 
                        for name, value in annots.iteritems():
1013
 
                            ann_tag = document.createElement(
1014
 
                                "annotation")
1015
 
                            ann_tag.setAttribute("name", name)
1016
 
                            ann_tag.setAttribute("value", value)
1017
 
                            tag.appendChild(ann_tag)
1018
 
                # Add interface annotation tags
1019
 
                for annotation, value in dict(
1020
 
                    itertools.chain.from_iterable(
1021
 
                        annotations().iteritems()
1022
 
                        for name, annotations in
1023
 
                        self._get_all_dbus_things("interface")
1024
 
                        if name == if_tag.getAttribute("name")
1025
 
                        )).iteritems():
1026
 
                    ann_tag = document.createElement("annotation")
1027
 
                    ann_tag.setAttribute("name", annotation)
1028
 
                    ann_tag.setAttribute("value", value)
1029
 
                    if_tag.appendChild(ann_tag)
1030
 
                # Add the names to the return values for the
1031
 
                # "org.freedesktop.DBus.Properties" methods
1032
 
                if (if_tag.getAttribute("name")
1033
 
                    == "org.freedesktop.DBus.Properties"):
1034
 
                    for cn in if_tag.getElementsByTagName("method"):
1035
 
                        if cn.getAttribute("name") == "Get":
1036
 
                            for arg in cn.getElementsByTagName("arg"):
1037
 
                                if (arg.getAttribute("direction")
1038
 
                                    == "out"):
1039
 
                                    arg.setAttribute("name", "value")
1040
 
                        elif cn.getAttribute("name") == "GetAll":
1041
 
                            for arg in cn.getElementsByTagName("arg"):
1042
 
                                if (arg.getAttribute("direction")
1043
 
                                    == "out"):
1044
 
                                    arg.setAttribute("name", "props")
1045
 
            xmlstring = document.toxml("utf-8")
1046
 
            document.unlink()
1047
 
        except (AttributeError, xml.dom.DOMException,
1048
 
                xml.parsers.expat.ExpatError) as error:
1049
 
            logger.error("Failed to override Introspection method",
1050
 
                         exc_info=error)
1051
 
        return xmlstring
1052
 
 
1053
 
 
1054
 
def datetime_to_dbus(dt, variant_level=0):
1055
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1056
 
    if dt is None:
1057
 
        return dbus.String("", variant_level = variant_level)
1058
 
    return dbus.String(dt.isoformat(),
1059
 
                       variant_level=variant_level)
1060
 
 
1061
 
 
1062
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1063
 
    """A class decorator; applied to a subclass of
1064
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1065
 
    interface names according to the "alt_interface_names" mapping.
1066
 
    Usage:
1067
 
    
1068
 
    @alternate_dbus_interfaces({"org.example.Interface":
1069
 
                                    "net.example.AlternateInterface"})
1070
 
    class SampleDBusObject(dbus.service.Object):
1071
 
        @dbus.service.method("org.example.Interface")
1072
 
        def SampleDBusMethod():
1073
 
            pass
1074
 
    
1075
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1076
 
    reachable via two interfaces: "org.example.Interface" and
1077
 
    "net.example.AlternateInterface", the latter of which will have
1078
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1079
 
    "true", unless "deprecate" is passed with a False value.
1080
 
    
1081
 
    This works for methods and signals, and also for D-Bus properties
1082
 
    (from DBusObjectWithProperties) and interfaces (from the
1083
 
    dbus_interface_annotations decorator).
1084
 
    """
1085
 
    def wrapper(cls):
1086
 
        for orig_interface_name, alt_interface_name in (
1087
 
            alt_interface_names.iteritems()):
1088
 
            attr = {}
1089
 
            interface_names = set()
1090
 
            # Go though all attributes of the class
1091
 
            for attrname, attribute in inspect.getmembers(cls):
1092
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1093
 
                # with the wrong interface name
1094
 
                if (not hasattr(attribute, "_dbus_interface")
1095
 
                    or not attribute._dbus_interface
1096
 
                    .startswith(orig_interface_name)):
1097
 
                    continue
1098
 
                # Create an alternate D-Bus interface name based on
1099
 
                # the current name
1100
 
                alt_interface = (attribute._dbus_interface
1101
 
                                 .replace(orig_interface_name,
1102
 
                                          alt_interface_name))
1103
 
                interface_names.add(alt_interface)
1104
 
                # Is this a D-Bus signal?
1105
 
                if getattr(attribute, "_dbus_is_signal", False):
1106
 
                    # Extract the original non-method undecorated
1107
 
                    # function by black magic
1108
 
                    nonmethod_func = (dict(
1109
 
                            zip(attribute.func_code.co_freevars,
1110
 
                                attribute.__closure__))["func"]
1111
 
                                      .cell_contents)
1112
 
                    # Create a new, but exactly alike, function
1113
 
                    # object, and decorate it to be a new D-Bus signal
1114
 
                    # with the alternate D-Bus interface name
1115
 
                    new_function = (dbus.service.signal
1116
 
                                    (alt_interface,
1117
 
                                     attribute._dbus_signature)
1118
 
                                    (types.FunctionType(
1119
 
                                nonmethod_func.func_code,
1120
 
                                nonmethod_func.func_globals,
1121
 
                                nonmethod_func.func_name,
1122
 
                                nonmethod_func.func_defaults,
1123
 
                                nonmethod_func.func_closure)))
1124
 
                    # Copy annotations, if any
1125
 
                    try:
1126
 
                        new_function._dbus_annotations = (
1127
 
                            dict(attribute._dbus_annotations))
1128
 
                    except AttributeError:
1129
 
                        pass
1130
 
                    # Define a creator of a function to call both the
1131
 
                    # original and alternate functions, so both the
1132
 
                    # original and alternate signals gets sent when
1133
 
                    # the function is called
1134
 
                    def fixscope(func1, func2):
1135
 
                        """This function is a scope container to pass
1136
 
                        func1 and func2 to the "call_both" function
1137
 
                        outside of its arguments"""
1138
 
                        def call_both(*args, **kwargs):
1139
 
                            """This function will emit two D-Bus
1140
 
                            signals by calling func1 and func2"""
1141
 
                            func1(*args, **kwargs)
1142
 
                            func2(*args, **kwargs)
1143
 
                        return call_both
1144
 
                    # Create the "call_both" function and add it to
1145
 
                    # the class
1146
 
                    attr[attrname] = fixscope(attribute, new_function)
1147
 
                # Is this a D-Bus method?
1148
 
                elif getattr(attribute, "_dbus_is_method", False):
1149
 
                    # Create a new, but exactly alike, function
1150
 
                    # object.  Decorate it to be a new D-Bus method
1151
 
                    # with the alternate D-Bus interface name.  Add it
1152
 
                    # to the class.
1153
 
                    attr[attrname] = (dbus.service.method
1154
 
                                      (alt_interface,
1155
 
                                       attribute._dbus_in_signature,
1156
 
                                       attribute._dbus_out_signature)
1157
 
                                      (types.FunctionType
1158
 
                                       (attribute.func_code,
1159
 
                                        attribute.func_globals,
1160
 
                                        attribute.func_name,
1161
 
                                        attribute.func_defaults,
1162
 
                                        attribute.func_closure)))
1163
 
                    # Copy annotations, if any
1164
 
                    try:
1165
 
                        attr[attrname]._dbus_annotations = (
1166
 
                            dict(attribute._dbus_annotations))
1167
 
                    except AttributeError:
1168
 
                        pass
1169
 
                # Is this a D-Bus property?
1170
 
                elif getattr(attribute, "_dbus_is_property", False):
1171
 
                    # Create a new, but exactly alike, function
1172
 
                    # object, and decorate it to be a new D-Bus
1173
 
                    # property with the alternate D-Bus interface
1174
 
                    # name.  Add it to the class.
1175
 
                    attr[attrname] = (dbus_service_property
1176
 
                                      (alt_interface,
1177
 
                                       attribute._dbus_signature,
1178
 
                                       attribute._dbus_access,
1179
 
                                       attribute
1180
 
                                       ._dbus_get_args_options
1181
 
                                       ["byte_arrays"])
1182
 
                                      (types.FunctionType
1183
 
                                       (attribute.func_code,
1184
 
                                        attribute.func_globals,
1185
 
                                        attribute.func_name,
1186
 
                                        attribute.func_defaults,
1187
 
                                        attribute.func_closure)))
1188
 
                    # Copy annotations, if any
1189
 
                    try:
1190
 
                        attr[attrname]._dbus_annotations = (
1191
 
                            dict(attribute._dbus_annotations))
1192
 
                    except AttributeError:
1193
 
                        pass
1194
 
                # Is this a D-Bus interface?
1195
 
                elif getattr(attribute, "_dbus_is_interface", False):
1196
 
                    # Create a new, but exactly alike, function
1197
 
                    # object.  Decorate it to be a new D-Bus interface
1198
 
                    # with the alternate D-Bus interface name.  Add it
1199
 
                    # to the class.
1200
 
                    attr[attrname] = (dbus_interface_annotations
1201
 
                                      (alt_interface)
1202
 
                                      (types.FunctionType
1203
 
                                       (attribute.func_code,
1204
 
                                        attribute.func_globals,
1205
 
                                        attribute.func_name,
1206
 
                                        attribute.func_defaults,
1207
 
                                        attribute.func_closure)))
1208
 
            if deprecate:
1209
 
                # Deprecate all alternate interfaces
1210
 
                iname="_AlternateDBusNames_interface_annotation{0}"
1211
 
                for interface_name in interface_names:
1212
 
                    @dbus_interface_annotations(interface_name)
1213
 
                    def func(self):
1214
 
                        return { "org.freedesktop.DBus.Deprecated":
1215
 
                                     "true" }
1216
 
                    # Find an unused name
1217
 
                    for aname in (iname.format(i)
1218
 
                                  for i in itertools.count()):
1219
 
                        if aname not in attr:
1220
 
                            attr[aname] = func
1221
 
                            break
1222
 
            if interface_names:
1223
 
                # Replace the class with a new subclass of it with
1224
 
                # methods, signals, etc. as created above.
1225
 
                cls = type(b"{0}Alternate".format(cls.__name__),
1226
 
                           (cls,), attr)
1227
 
        return cls
1228
 
    return wrapper
1229
 
 
1230
 
 
1231
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1232
 
                                "se.bsnet.fukt.Mandos"})
1233
 
class ClientDBus(Client, DBusObjectWithProperties):
1234
 
    """A Client class using D-Bus
1235
 
    
1236
 
    Attributes:
1237
 
    dbus_object_path: dbus.ObjectPath
1238
 
    bus: dbus.SystemBus()
1239
 
    """
1240
 
    
1241
 
    runtime_expansions = (Client.runtime_expansions
1242
 
                          + ("dbus_object_path",))
1243
 
    
1244
 
    # dbus.service.Object doesn't use super(), so we can't either.
1245
 
    
1246
 
    def __init__(self, bus = None, *args, **kwargs):
1247
 
        self.bus = bus
1248
 
        Client.__init__(self, *args, **kwargs)
1249
 
        # Only now, when this client is initialized, can it show up on
1250
 
        # the D-Bus
1251
 
        client_object_name = unicode(self.name).translate(
1252
 
            {ord("."): ord("_"),
1253
 
             ord("-"): ord("_")})
1254
 
        self.dbus_object_path = (dbus.ObjectPath
1255
 
                                 ("/clients/" + client_object_name))
1256
 
        DBusObjectWithProperties.__init__(self, self.bus,
1257
 
                                          self.dbus_object_path)
1258
 
    
1259
 
    def notifychangeproperty(transform_func,
1260
 
                             dbus_name, type_func=lambda x: x,
1261
 
                             variant_level=1):
1262
 
        """ Modify a variable so that it's a property which announces
1263
 
        its changes to DBus.
1264
 
        
1265
 
        transform_fun: Function that takes a value and a variant_level
1266
 
                       and transforms it to a D-Bus type.
1267
 
        dbus_name: D-Bus name of the variable
1268
 
        type_func: Function that transform the value before sending it
1269
 
                   to the D-Bus.  Default: no transform
1270
 
        variant_level: D-Bus variant level.  Default: 1
1271
 
        """
1272
 
        attrname = "_{0}".format(dbus_name)
1273
 
        def setter(self, value):
1274
 
            if hasattr(self, "dbus_object_path"):
1275
 
                if (not hasattr(self, attrname) or
1276
 
                    type_func(getattr(self, attrname, None))
1277
 
                    != type_func(value)):
1278
 
                    dbus_value = transform_func(type_func(value),
1279
 
                                                variant_level
1280
 
                                                =variant_level)
1281
 
                    self.PropertyChanged(dbus.String(dbus_name),
1282
 
                                         dbus_value)
1283
 
            setattr(self, attrname, value)
1284
 
        
1285
 
        return property(lambda self: getattr(self, attrname), setter)
1286
 
    
1287
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1288
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1289
 
                                             "ApprovalPending",
1290
 
                                             type_func = bool)
1291
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1292
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1293
 
                                        "LastEnabled")
1294
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1295
 
                                   type_func = lambda checker:
1296
 
                                       checker is not None)
1297
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1298
 
                                           "LastCheckedOK")
1299
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1300
 
                                               "LastCheckerStatus")
1301
 
    last_approval_request = notifychangeproperty(
1302
 
        datetime_to_dbus, "LastApprovalRequest")
1303
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1304
 
                                               "ApprovedByDefault")
1305
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1306
 
                                          "ApprovalDelay",
1307
 
                                          type_func =
1308
 
                                          timedelta_to_milliseconds)
1309
 
    approval_duration = notifychangeproperty(
1310
 
        dbus.UInt64, "ApprovalDuration",
1311
 
        type_func = timedelta_to_milliseconds)
1312
 
    host = notifychangeproperty(dbus.String, "Host")
1313
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1314
 
                                   type_func =
1315
 
                                   timedelta_to_milliseconds)
1316
 
    extended_timeout = notifychangeproperty(
1317
 
        dbus.UInt64, "ExtendedTimeout",
1318
 
        type_func = timedelta_to_milliseconds)
1319
 
    interval = notifychangeproperty(dbus.UInt64,
1320
 
                                    "Interval",
1321
 
                                    type_func =
1322
 
                                    timedelta_to_milliseconds)
1323
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1324
 
    
1325
 
    del notifychangeproperty
1326
 
    
1327
 
    def __del__(self, *args, **kwargs):
1328
 
        try:
1329
 
            self.remove_from_connection()
1330
 
        except LookupError:
1331
 
            pass
1332
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1333
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1334
 
        Client.__del__(self, *args, **kwargs)
1335
 
    
1336
 
    def checker_callback(self, pid, condition, command,
1337
 
                         *args, **kwargs):
 
233
        gobject.source_remove(self.checker_callback_tag)
1338
234
        self.checker_callback_tag = None
 
235
        os.kill(self.checker.pid, signal.SIGTERM)
 
236
        if self.checker.poll() is None:
 
237
            os.kill(self.checker.pid, signal.SIGKILL)
1339
238
        self.checker = None
1340
 
        if os.WIFEXITED(condition):
1341
 
            exitstatus = os.WEXITSTATUS(condition)
1342
 
            # Emit D-Bus signal
1343
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1344
 
                                  dbus.Int64(condition),
1345
 
                                  dbus.String(command))
1346
 
        else:
1347
 
            # Emit D-Bus signal
1348
 
            self.CheckerCompleted(dbus.Int16(-1),
1349
 
                                  dbus.Int64(condition),
1350
 
                                  dbus.String(command))
1351
 
        
1352
 
        return Client.checker_callback(self, pid, condition, command,
1353
 
                                       *args, **kwargs)
1354
 
    
1355
 
    def start_checker(self, *args, **kwargs):
1356
 
        old_checker_pid = getattr(self.checker, "pid", None)
1357
 
        r = Client.start_checker(self, *args, **kwargs)
1358
 
        # Only if new checker process was started
1359
 
        if (self.checker is not None
1360
 
            and old_checker_pid != self.checker.pid):
1361
 
            # Emit D-Bus signal
1362
 
            self.CheckerStarted(self.current_checker_command)
1363
 
        return r
1364
 
    
1365
 
    def _reset_approved(self):
1366
 
        self.approved = None
1367
 
        return False
1368
 
    
1369
 
    def approve(self, value=True):
1370
 
        self.approved = value
1371
 
        gobject.timeout_add(timedelta_to_milliseconds
1372
 
                            (self.approval_duration),
1373
 
                            self._reset_approved)
1374
 
        self.send_changedstate()
1375
 
    
1376
 
    ## D-Bus methods, signals & properties
1377
 
    _interface = "se.recompile.Mandos.Client"
1378
 
    
1379
 
    ## Interfaces
1380
 
    
1381
 
    @dbus_interface_annotations(_interface)
1382
 
    def _foo(self):
1383
 
        return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1384
 
                     "false"}
1385
 
    
1386
 
    ## Signals
1387
 
    
1388
 
    # CheckerCompleted - signal
1389
 
    @dbus.service.signal(_interface, signature="nxs")
1390
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1391
 
        "D-Bus signal"
1392
 
        pass
1393
 
    
1394
 
    # CheckerStarted - signal
1395
 
    @dbus.service.signal(_interface, signature="s")
1396
 
    def CheckerStarted(self, command):
1397
 
        "D-Bus signal"
1398
 
        pass
1399
 
    
1400
 
    # PropertyChanged - signal
1401
 
    @dbus.service.signal(_interface, signature="sv")
1402
 
    def PropertyChanged(self, property, value):
1403
 
        "D-Bus signal"
1404
 
        pass
1405
 
    
1406
 
    # GotSecret - signal
1407
 
    @dbus.service.signal(_interface)
1408
 
    def GotSecret(self):
1409
 
        """D-Bus signal
1410
 
        Is sent after a successful transfer of secret from the Mandos
1411
 
        server to mandos-client
1412
 
        """
1413
 
        pass
1414
 
    
1415
 
    # Rejected - signal
1416
 
    @dbus.service.signal(_interface, signature="s")
1417
 
    def Rejected(self, reason):
1418
 
        "D-Bus signal"
1419
 
        pass
1420
 
    
1421
 
    # NeedApproval - signal
1422
 
    @dbus.service.signal(_interface, signature="tb")
1423
 
    def NeedApproval(self, timeout, default):
1424
 
        "D-Bus signal"
1425
 
        return self.need_approval()
1426
 
    
1427
 
    ## Methods
1428
 
    
1429
 
    # Approve - method
1430
 
    @dbus.service.method(_interface, in_signature="b")
1431
 
    def Approve(self, value):
1432
 
        self.approve(value)
1433
 
    
1434
 
    # CheckedOK - method
1435
 
    @dbus.service.method(_interface)
1436
 
    def CheckedOK(self):
1437
 
        self.checked_ok()
1438
 
    
1439
 
    # Enable - method
1440
 
    @dbus.service.method(_interface)
1441
 
    def Enable(self):
1442
 
        "D-Bus method"
1443
 
        self.enable()
1444
 
    
1445
 
    # StartChecker - method
1446
 
    @dbus.service.method(_interface)
1447
 
    def StartChecker(self):
1448
 
        "D-Bus method"
1449
 
        self.start_checker()
1450
 
    
1451
 
    # Disable - method
1452
 
    @dbus.service.method(_interface)
1453
 
    def Disable(self):
1454
 
        "D-Bus method"
1455
 
        self.disable()
1456
 
    
1457
 
    # StopChecker - method
1458
 
    @dbus.service.method(_interface)
1459
 
    def StopChecker(self):
1460
 
        self.stop_checker()
1461
 
    
1462
 
    ## Properties
1463
 
    
1464
 
    # ApprovalPending - property
1465
 
    @dbus_service_property(_interface, signature="b", access="read")
1466
 
    def ApprovalPending_dbus_property(self):
1467
 
        return dbus.Boolean(bool(self.approvals_pending))
1468
 
    
1469
 
    # ApprovedByDefault - property
1470
 
    @dbus_service_property(_interface, signature="b",
1471
 
                           access="readwrite")
1472
 
    def ApprovedByDefault_dbus_property(self, value=None):
1473
 
        if value is None:       # get
1474
 
            return dbus.Boolean(self.approved_by_default)
1475
 
        self.approved_by_default = bool(value)
1476
 
    
1477
 
    # ApprovalDelay - property
1478
 
    @dbus_service_property(_interface, signature="t",
1479
 
                           access="readwrite")
1480
 
    def ApprovalDelay_dbus_property(self, value=None):
1481
 
        if value is None:       # get
1482
 
            return dbus.UInt64(self.approval_delay_milliseconds())
1483
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1484
 
    
1485
 
    # ApprovalDuration - property
1486
 
    @dbus_service_property(_interface, signature="t",
1487
 
                           access="readwrite")
1488
 
    def ApprovalDuration_dbus_property(self, value=None):
1489
 
        if value is None:       # get
1490
 
            return dbus.UInt64(timedelta_to_milliseconds(
1491
 
                    self.approval_duration))
1492
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1493
 
    
1494
 
    # Name - property
1495
 
    @dbus_service_property(_interface, signature="s", access="read")
1496
 
    def Name_dbus_property(self):
1497
 
        return dbus.String(self.name)
1498
 
    
1499
 
    # Fingerprint - property
1500
 
    @dbus_service_property(_interface, signature="s", access="read")
1501
 
    def Fingerprint_dbus_property(self):
1502
 
        return dbus.String(self.fingerprint)
1503
 
    
1504
 
    # Host - property
1505
 
    @dbus_service_property(_interface, signature="s",
1506
 
                           access="readwrite")
1507
 
    def Host_dbus_property(self, value=None):
1508
 
        if value is None:       # get
1509
 
            return dbus.String(self.host)
1510
 
        self.host = unicode(value)
1511
 
    
1512
 
    # Created - property
1513
 
    @dbus_service_property(_interface, signature="s", access="read")
1514
 
    def Created_dbus_property(self):
1515
 
        return datetime_to_dbus(self.created)
1516
 
    
1517
 
    # LastEnabled - property
1518
 
    @dbus_service_property(_interface, signature="s", access="read")
1519
 
    def LastEnabled_dbus_property(self):
1520
 
        return datetime_to_dbus(self.last_enabled)
1521
 
    
1522
 
    # Enabled - property
1523
 
    @dbus_service_property(_interface, signature="b",
1524
 
                           access="readwrite")
1525
 
    def Enabled_dbus_property(self, value=None):
1526
 
        if value is None:       # get
1527
 
            return dbus.Boolean(self.enabled)
1528
 
        if value:
1529
 
            self.enable()
1530
 
        else:
1531
 
            self.disable()
1532
 
    
1533
 
    # LastCheckedOK - property
1534
 
    @dbus_service_property(_interface, signature="s",
1535
 
                           access="readwrite")
1536
 
    def LastCheckedOK_dbus_property(self, value=None):
1537
 
        if value is not None:
1538
 
            self.checked_ok()
1539
 
            return
1540
 
        return datetime_to_dbus(self.last_checked_ok)
1541
 
    
1542
 
    # LastCheckerStatus - property
1543
 
    @dbus_service_property(_interface, signature="n",
1544
 
                           access="read")
1545
 
    def LastCheckerStatus_dbus_property(self):
1546
 
        return dbus.Int16(self.last_checker_status)
1547
 
    
1548
 
    # Expires - property
1549
 
    @dbus_service_property(_interface, signature="s", access="read")
1550
 
    def Expires_dbus_property(self):
1551
 
        return datetime_to_dbus(self.expires)
1552
 
    
1553
 
    # LastApprovalRequest - property
1554
 
    @dbus_service_property(_interface, signature="s", access="read")
1555
 
    def LastApprovalRequest_dbus_property(self):
1556
 
        return datetime_to_dbus(self.last_approval_request)
1557
 
    
1558
 
    # Timeout - property
1559
 
    @dbus_service_property(_interface, signature="t",
1560
 
                           access="readwrite")
1561
 
    def Timeout_dbus_property(self, value=None):
1562
 
        if value is None:       # get
1563
 
            return dbus.UInt64(self.timeout_milliseconds())
1564
 
        old_timeout = self.timeout
1565
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1566
 
        # Reschedule disabling
1567
 
        if self.enabled:
1568
 
            now = datetime.datetime.utcnow()
1569
 
            self.expires += self.timeout - old_timeout
1570
 
            if self.expires <= now:
1571
 
                # The timeout has passed
1572
 
                self.disable()
1573
 
            else:
1574
 
                if (getattr(self, "disable_initiator_tag", None)
1575
 
                    is None):
1576
 
                    return
1577
 
                gobject.source_remove(self.disable_initiator_tag)
1578
 
                self.disable_initiator_tag = (
1579
 
                    gobject.timeout_add(
1580
 
                        timedelta_to_milliseconds(self.expires - now),
1581
 
                        self.disable))
1582
 
    
1583
 
    # ExtendedTimeout - property
1584
 
    @dbus_service_property(_interface, signature="t",
1585
 
                           access="readwrite")
1586
 
    def ExtendedTimeout_dbus_property(self, value=None):
1587
 
        if value is None:       # get
1588
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
1589
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1590
 
    
1591
 
    # Interval - property
1592
 
    @dbus_service_property(_interface, signature="t",
1593
 
                           access="readwrite")
1594
 
    def Interval_dbus_property(self, value=None):
1595
 
        if value is None:       # get
1596
 
            return dbus.UInt64(self.interval_milliseconds())
1597
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1598
 
        if getattr(self, "checker_initiator_tag", None) is None:
1599
 
            return
1600
 
        if self.enabled:
1601
 
            # Reschedule checker run
1602
 
            gobject.source_remove(self.checker_initiator_tag)
1603
 
            self.checker_initiator_tag = (gobject.timeout_add
1604
 
                                          (value, self.start_checker))
1605
 
            self.start_checker()    # Start one now, too
1606
 
    
1607
 
    # Checker - property
1608
 
    @dbus_service_property(_interface, signature="s",
1609
 
                           access="readwrite")
1610
 
    def Checker_dbus_property(self, value=None):
1611
 
        if value is None:       # get
1612
 
            return dbus.String(self.checker_command)
1613
 
        self.checker_command = unicode(value)
1614
 
    
1615
 
    # CheckerRunning - property
1616
 
    @dbus_service_property(_interface, signature="b",
1617
 
                           access="readwrite")
1618
 
    def CheckerRunning_dbus_property(self, value=None):
1619
 
        if value is None:       # get
1620
 
            return dbus.Boolean(self.checker is not None)
1621
 
        if value:
1622
 
            self.start_checker()
1623
 
        else:
1624
 
            self.stop_checker()
1625
 
    
1626
 
    # ObjectPath - property
1627
 
    @dbus_service_property(_interface, signature="o", access="read")
1628
 
    def ObjectPath_dbus_property(self):
1629
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1630
 
    
1631
 
    # Secret = property
1632
 
    @dbus_service_property(_interface, signature="ay",
1633
 
                           access="write", byte_arrays=True)
1634
 
    def Secret_dbus_property(self, value):
1635
 
        self.secret = str(value)
1636
 
    
1637
 
    del _interface
1638
 
 
1639
 
 
1640
 
class ProxyClient(object):
1641
 
    def __init__(self, child_pipe, fpr, address):
1642
 
        self._pipe = child_pipe
1643
 
        self._pipe.send(('init', fpr, address))
1644
 
        if not self._pipe.recv():
1645
 
            raise KeyError()
1646
 
    
1647
 
    def __getattribute__(self, name):
1648
 
        if name == '_pipe':
1649
 
            return super(ProxyClient, self).__getattribute__(name)
1650
 
        self._pipe.send(('getattr', name))
1651
 
        data = self._pipe.recv()
1652
 
        if data[0] == 'data':
1653
 
            return data[1]
1654
 
        if data[0] == 'function':
1655
 
            def func(*args, **kwargs):
1656
 
                self._pipe.send(('funcall', name, args, kwargs))
1657
 
                return self._pipe.recv()[1]
1658
 
            return func
1659
 
    
1660
 
    def __setattr__(self, name, value):
1661
 
        if name == '_pipe':
1662
 
            return super(ProxyClient, self).__setattr__(name, value)
1663
 
        self._pipe.send(('setattr', name, value))
1664
 
 
1665
 
 
1666
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1667
 
    """A class to handle client connections.
1668
 
    
1669
 
    Instantiated once for each connection to handle it.
 
239
    def still_valid(self, now=None):
 
240
        """Has the timeout not yet passed for this client?"""
 
241
        if now is None:
 
242
            now = datetime.datetime.now()
 
243
        if self.last_seen is None:
 
244
            return now < (self.created + self.timeout)
 
245
        else:
 
246
            return now < (self.last_seen + self.timeout)
 
247
 
 
248
 
 
249
def peer_certificate(session):
 
250
    # If not an OpenPGP certificate...
 
251
    if gnutls.library.functions.gnutls_certificate_type_get\
 
252
            (session._c_object) \
 
253
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
254
        # ...do the normal thing
 
255
        return session.peer_certificate
 
256
    list_size = ctypes.c_uint()
 
257
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
258
        (session._c_object, ctypes.byref(list_size))
 
259
    if list_size.value == 0:
 
260
        return None
 
261
    cert = cert_list[0]
 
262
    return ctypes.string_at(cert.data, cert.size)
 
263
 
 
264
 
 
265
def fingerprint(openpgp):
 
266
    # New empty GnuTLS certificate
 
267
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
268
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
269
        (ctypes.byref(crt))
 
270
    # New GnuTLS "datum" with the OpenPGP public key
 
271
    datum = gnutls.library.types.gnutls_datum_t\
 
272
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
273
                     ctypes.POINTER(ctypes.c_ubyte)),
 
274
         ctypes.c_uint(len(openpgp)))
 
275
    # Import the OpenPGP public key into the certificate
 
276
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
277
        (crt,
 
278
         ctypes.byref(datum),
 
279
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
280
    # New buffer for the fingerprint
 
281
    buffer = ctypes.create_string_buffer(20)
 
282
    buffer_length = ctypes.c_size_t()
 
283
    # Get the fingerprint from the certificate into the buffer
 
284
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
285
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
286
    # Deinit the certificate
 
287
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
288
    # Convert the buffer to a Python bytestring
 
289
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
290
    # Convert the bytestring to hexadecimal notation
 
291
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
292
    return hex_fpr
 
293
 
 
294
 
 
295
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
296
    """A TCP request handler class.
 
297
    Instantiated by IPv6_TCPServer for each request to handle it.
1670
298
    Note: This will run in its own forked process."""
1671
299
    
1672
300
    def handle(self):
1673
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1674
 
            logger.info("TCP connection from: %s",
1675
 
                        unicode(self.client_address))
1676
 
            logger.debug("Pipe FD: %d",
1677
 
                         self.server.child_pipe.fileno())
1678
 
            
1679
 
            session = (gnutls.connection
1680
 
                       .ClientSession(self.request,
1681
 
                                      gnutls.connection
1682
 
                                      .X509Credentials()))
1683
 
            
1684
 
            # Note: gnutls.connection.X509Credentials is really a
1685
 
            # generic GnuTLS certificate credentials object so long as
1686
 
            # no X.509 keys are added to it.  Therefore, we can use it
1687
 
            # here despite using OpenPGP certificates.
1688
 
            
1689
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1690
 
            #                      "+AES-256-CBC", "+SHA1",
1691
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1692
 
            #                      "+DHE-DSS"))
1693
 
            # Use a fallback default, since this MUST be set.
1694
 
            priority = self.server.gnutls_priority
1695
 
            if priority is None:
1696
 
                priority = "NORMAL"
1697
 
            (gnutls.library.functions
1698
 
             .gnutls_priority_set_direct(session._c_object,
1699
 
                                         priority, None))
1700
 
            
1701
 
            # Start communication using the Mandos protocol
1702
 
            # Get protocol number
1703
 
            line = self.request.makefile().readline()
1704
 
            logger.debug("Protocol version: %r", line)
1705
 
            try:
1706
 
                if int(line.strip().split()[0]) > 1:
1707
 
                    raise RuntimeError(line)
1708
 
            except (ValueError, IndexError, RuntimeError) as error:
1709
 
                logger.error("Unknown protocol version: %s", error)
1710
 
                return
1711
 
            
1712
 
            # Start GnuTLS connection
1713
 
            try:
1714
 
                session.handshake()
1715
 
            except gnutls.errors.GNUTLSError as error:
1716
 
                logger.warning("Handshake failed: %s", error)
1717
 
                # Do not run session.bye() here: the session is not
1718
 
                # established.  Just abandon the request.
1719
 
                return
1720
 
            logger.debug("Handshake succeeded")
1721
 
            
1722
 
            approval_required = False
1723
 
            try:
1724
 
                try:
1725
 
                    fpr = self.fingerprint(self.peer_certificate
1726
 
                                           (session))
1727
 
                except (TypeError,
1728
 
                        gnutls.errors.GNUTLSError) as error:
1729
 
                    logger.warning("Bad certificate: %s", error)
1730
 
                    return
1731
 
                logger.debug("Fingerprint: %s", fpr)
1732
 
                
1733
 
                try:
1734
 
                    client = ProxyClient(child_pipe, fpr,
1735
 
                                         self.client_address)
1736
 
                except KeyError:
1737
 
                    return
1738
 
                
1739
 
                if client.approval_delay:
1740
 
                    delay = client.approval_delay
1741
 
                    client.approvals_pending += 1
1742
 
                    approval_required = True
1743
 
                
1744
 
                while True:
1745
 
                    if not client.enabled:
1746
 
                        logger.info("Client %s is disabled",
1747
 
                                       client.name)
1748
 
                        if self.server.use_dbus:
1749
 
                            # Emit D-Bus signal
1750
 
                            client.Rejected("Disabled")
1751
 
                        return
1752
 
                    
1753
 
                    if client.approved or not client.approval_delay:
1754
 
                        #We are approved or approval is disabled
1755
 
                        break
1756
 
                    elif client.approved is None:
1757
 
                        logger.info("Client %s needs approval",
1758
 
                                    client.name)
1759
 
                        if self.server.use_dbus:
1760
 
                            # Emit D-Bus signal
1761
 
                            client.NeedApproval(
1762
 
                                client.approval_delay_milliseconds(),
1763
 
                                client.approved_by_default)
1764
 
                    else:
1765
 
                        logger.warning("Client %s was not approved",
1766
 
                                       client.name)
1767
 
                        if self.server.use_dbus:
1768
 
                            # Emit D-Bus signal
1769
 
                            client.Rejected("Denied")
1770
 
                        return
1771
 
                    
1772
 
                    #wait until timeout or approved
1773
 
                    time = datetime.datetime.now()
1774
 
                    client.changedstate.acquire()
1775
 
                    client.changedstate.wait(
1776
 
                        float(timedelta_to_milliseconds(delay)
1777
 
                              / 1000))
1778
 
                    client.changedstate.release()
1779
 
                    time2 = datetime.datetime.now()
1780
 
                    if (time2 - time) >= delay:
1781
 
                        if not client.approved_by_default:
1782
 
                            logger.warning("Client %s timed out while"
1783
 
                                           " waiting for approval",
1784
 
                                           client.name)
1785
 
                            if self.server.use_dbus:
1786
 
                                # Emit D-Bus signal
1787
 
                                client.Rejected("Approval timed out")
1788
 
                            return
1789
 
                        else:
1790
 
                            break
1791
 
                    else:
1792
 
                        delay -= time2 - time
1793
 
                
1794
 
                sent_size = 0
1795
 
                while sent_size < len(client.secret):
1796
 
                    try:
1797
 
                        sent = session.send(client.secret[sent_size:])
1798
 
                    except gnutls.errors.GNUTLSError as error:
1799
 
                        logger.warning("gnutls send failed",
1800
 
                                       exc_info=error)
1801
 
                        return
1802
 
                    logger.debug("Sent: %d, remaining: %d",
1803
 
                                 sent, len(client.secret)
1804
 
                                 - (sent_size + sent))
1805
 
                    sent_size += sent
1806
 
                
1807
 
                logger.info("Sending secret to %s", client.name)
1808
 
                # bump the timeout using extended_timeout
1809
 
                client.bump_timeout(client.extended_timeout)
1810
 
                if self.server.use_dbus:
1811
 
                    # Emit D-Bus signal
1812
 
                    client.GotSecret()
1813
 
            
1814
 
            finally:
1815
 
                if approval_required:
1816
 
                    client.approvals_pending -= 1
1817
 
                try:
1818
 
                    session.bye()
1819
 
                except gnutls.errors.GNUTLSError as error:
1820
 
                    logger.warning("GnuTLS bye failed",
1821
 
                                   exc_info=error)
1822
 
    
1823
 
    @staticmethod
1824
 
    def peer_certificate(session):
1825
 
        "Return the peer's OpenPGP certificate as a bytestring"
1826
 
        # If not an OpenPGP certificate...
1827
 
        if (gnutls.library.functions
1828
 
            .gnutls_certificate_type_get(session._c_object)
1829
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1830
 
            # ...do the normal thing
1831
 
            return session.peer_certificate
1832
 
        list_size = ctypes.c_uint(1)
1833
 
        cert_list = (gnutls.library.functions
1834
 
                     .gnutls_certificate_get_peers
1835
 
                     (session._c_object, ctypes.byref(list_size)))
1836
 
        if not bool(cert_list) and list_size.value != 0:
1837
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1838
 
                                            " certificate")
1839
 
        if list_size.value == 0:
1840
 
            return None
1841
 
        cert = cert_list[0]
1842
 
        return ctypes.string_at(cert.data, cert.size)
1843
 
    
1844
 
    @staticmethod
1845
 
    def fingerprint(openpgp):
1846
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1847
 
        # New GnuTLS "datum" with the OpenPGP public key
1848
 
        datum = (gnutls.library.types
1849
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1850
 
                                             ctypes.POINTER
1851
 
                                             (ctypes.c_ubyte)),
1852
 
                                 ctypes.c_uint(len(openpgp))))
1853
 
        # New empty GnuTLS certificate
1854
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1855
 
        (gnutls.library.functions
1856
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1857
 
        # Import the OpenPGP public key into the certificate
1858
 
        (gnutls.library.functions
1859
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1860
 
                                    gnutls.library.constants
1861
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1862
 
        # Verify the self signature in the key
1863
 
        crtverify = ctypes.c_uint()
1864
 
        (gnutls.library.functions
1865
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1866
 
                                         ctypes.byref(crtverify)))
1867
 
        if crtverify.value != 0:
1868
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1869
 
            raise (gnutls.errors.CertificateSecurityError
1870
 
                   ("Verify failed"))
1871
 
        # New buffer for the fingerprint
1872
 
        buf = ctypes.create_string_buffer(20)
1873
 
        buf_len = ctypes.c_size_t()
1874
 
        # Get the fingerprint from the certificate into the buffer
1875
 
        (gnutls.library.functions
1876
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1877
 
                                             ctypes.byref(buf_len)))
1878
 
        # Deinit the certificate
1879
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1880
 
        # Convert the buffer to a Python bytestring
1881
 
        fpr = ctypes.string_at(buf, buf_len.value)
1882
 
        # Convert the bytestring to hexadecimal notation
1883
 
        hex_fpr = binascii.hexlify(fpr).upper()
1884
 
        return hex_fpr
1885
 
 
1886
 
 
1887
 
class MultiprocessingMixIn(object):
1888
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1889
 
    def sub_process_main(self, request, address):
1890
 
        try:
1891
 
            self.finish_request(request, address)
1892
 
        except Exception:
1893
 
            self.handle_error(request, address)
1894
 
        self.close_request(request)
1895
 
    
1896
 
    def process_request(self, request, address):
1897
 
        """Start a new process to process the request."""
1898
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1899
 
                                       args = (request, address))
1900
 
        proc.start()
1901
 
        return proc
1902
 
 
1903
 
 
1904
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1905
 
    """ adds a pipe to the MixIn """
1906
 
    def process_request(self, request, client_address):
1907
 
        """Overrides and wraps the original process_request().
1908
 
        
1909
 
        This function creates a new pipe in self.pipe
1910
 
        """
1911
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1912
 
        
1913
 
        proc = MultiprocessingMixIn.process_request(self, request,
1914
 
                                                    client_address)
1915
 
        self.child_pipe.close()
1916
 
        self.add_pipe(parent_pipe, proc)
1917
 
    
1918
 
    def add_pipe(self, parent_pipe, proc):
1919
 
        """Dummy function; override as necessary"""
1920
 
        raise NotImplementedError()
1921
 
 
1922
 
 
1923
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1924
 
                     socketserver.TCPServer, object):
1925
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1926
 
    
 
301
        if debug:
 
302
            sys.stderr.write(u"TCP request came\n")
 
303
            sys.stderr.write(u"Request: %s\n" % self.request)
 
304
            sys.stderr.write(u"Client Address: %s\n"
 
305
                             % unicode(self.client_address))
 
306
            sys.stderr.write(u"Server: %s\n" % self.server)
 
307
        session = gnutls.connection.ClientSession(self.request,
 
308
                                                  gnutls.connection.\
 
309
                                                  X509Credentials())
 
310
        
 
311
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
312
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
313
        #                "+DHE-DSS"))
 
314
        priority = "SECURE256"
 
315
        
 
316
        gnutls.library.functions.gnutls_priority_set_direct\
 
317
            (session._c_object, priority, None);
 
318
        
 
319
        try:
 
320
            session.handshake()
 
321
        except gnutls.errors.GNUTLSError, error:
 
322
            if debug:
 
323
                sys.stderr.write(u"Handshake failed: %s\n" % error)
 
324
            # Do not run session.bye() here: the session is not
 
325
            # established.  Just abandon the request.
 
326
            return
 
327
        try:
 
328
            fpr = fingerprint(peer_certificate(session))
 
329
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
330
            if debug:
 
331
                sys.stderr.write(u"Bad certificate: %s\n" % error)
 
332
            session.bye()
 
333
            return
 
334
        if debug:
 
335
            sys.stderr.write(u"Fingerprint: %s\n" % fpr)
 
336
        client = None
 
337
        for c in clients:
 
338
            if c.fingerprint == fpr:
 
339
                client = c
 
340
                break
 
341
        # Have to check if client.still_valid(), since it is possible
 
342
        # that the client timed out while establishing the GnuTLS
 
343
        # session.
 
344
        if (not client) or (not client.still_valid()):
 
345
            if debug:
 
346
                if client:
 
347
                    sys.stderr.write(u"Client %(name)s is invalid\n"
 
348
                                     % vars(client))
 
349
                else:
 
350
                    sys.stderr.write(u"Client not found for "
 
351
                                     u"fingerprint: %s\n" % fpr)
 
352
            session.bye()
 
353
            return
 
354
        sent_size = 0
 
355
        while sent_size < len(client.secret):
 
356
            sent = session.send(client.secret[sent_size:])
 
357
            if debug:
 
358
                sys.stderr.write(u"Sent: %d, remaining: %d\n"
 
359
                                 % (sent, len(client.secret)
 
360
                                    - (sent_size + sent)))
 
361
            sent_size += sent
 
362
        session.bye()
 
363
 
 
364
 
 
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
366
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1927
367
    Attributes:
1928
 
        enabled:        Boolean; whether this server is activated yet
1929
 
        interface:      None or a network interface name (string)
1930
 
        use_ipv6:       Boolean; to use IPv6 or not
 
368
        options:        Command line options
 
369
        clients:        Set() of Client objects
1931
370
    """
1932
 
    def __init__(self, server_address, RequestHandlerClass,
1933
 
                 interface=None, use_ipv6=True, socketfd=None):
1934
 
        """If socketfd is set, use that file descriptor instead of
1935
 
        creating a new one with socket.socket().
1936
 
        """
1937
 
        self.interface = interface
1938
 
        if use_ipv6:
1939
 
            self.address_family = socket.AF_INET6
1940
 
        if socketfd is not None:
1941
 
            # Save the file descriptor
1942
 
            self.socketfd = socketfd
1943
 
            # Save the original socket.socket() function
1944
 
            self.socket_socket = socket.socket
1945
 
            # To implement --socket, we monkey patch socket.socket.
1946
 
            # 
1947
 
            # (When socketserver.TCPServer is a new-style class, we
1948
 
            # could make self.socket into a property instead of monkey
1949
 
            # patching socket.socket.)
1950
 
            # 
1951
 
            # Create a one-time-only replacement for socket.socket()
1952
 
            @functools.wraps(socket.socket)
1953
 
            def socket_wrapper(*args, **kwargs):
1954
 
                # Restore original function so subsequent calls are
1955
 
                # not affected.
1956
 
                socket.socket = self.socket_socket
1957
 
                del self.socket_socket
1958
 
                # This time only, return a new socket object from the
1959
 
                # saved file descriptor.
1960
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1961
 
            # Replace socket.socket() function with wrapper
1962
 
            socket.socket = socket_wrapper
1963
 
        # The socketserver.TCPServer.__init__ will call
1964
 
        # socket.socket(), which might be our replacement,
1965
 
        # socket_wrapper(), if socketfd was set.
1966
 
        socketserver.TCPServer.__init__(self, server_address,
1967
 
                                        RequestHandlerClass)
1968
 
    
 
371
    address_family = socket.AF_INET6
 
372
    def __init__(self, *args, **kwargs):
 
373
        if "options" in kwargs:
 
374
            self.options = kwargs["options"]
 
375
            del kwargs["options"]
 
376
        if "clients" in kwargs:
 
377
            self.clients = kwargs["clients"]
 
378
            del kwargs["clients"]
 
379
        return super(type(self), self).__init__(*args, **kwargs)
1969
380
    def server_bind(self):
1970
381
        """This overrides the normal server_bind() function
1971
382
        to bind to an interface if one was specified, and also NOT to
1972
383
        bind to an address or port if they were not specified."""
1973
 
        if self.interface is not None:
1974
 
            if SO_BINDTODEVICE is None:
1975
 
                logger.error("SO_BINDTODEVICE does not exist;"
1976
 
                             " cannot bind to interface %s",
1977
 
                             self.interface)
1978
 
            else:
1979
 
                try:
1980
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1981
 
                                           SO_BINDTODEVICE,
1982
 
                                           str(self.interface + '\0'))
1983
 
                except socket.error as error:
1984
 
                    if error.errno == errno.EPERM:
1985
 
                        logger.error("No permission to bind to"
1986
 
                                     " interface %s", self.interface)
1987
 
                    elif error.errno == errno.ENOPROTOOPT:
1988
 
                        logger.error("SO_BINDTODEVICE not available;"
1989
 
                                     " cannot bind to interface %s",
1990
 
                                     self.interface)
1991
 
                    elif error.errno == errno.ENODEV:
1992
 
                        logger.error("Interface %s does not exist,"
1993
 
                                     " cannot bind", self.interface)
1994
 
                    else:
1995
 
                        raise
 
384
        if self.options.interface:
 
385
            if not hasattr(socket, "SO_BINDTODEVICE"):
 
386
                # From /usr/include/asm-i486/socket.h
 
387
                socket.SO_BINDTODEVICE = 25
 
388
            try:
 
389
                self.socket.setsockopt(socket.SOL_SOCKET,
 
390
                                       socket.SO_BINDTODEVICE,
 
391
                                       self.options.interface)
 
392
            except socket.error, error:
 
393
                if error[0] == errno.EPERM:
 
394
                    sys.stderr.write(u"Warning: No permission to" \
 
395
                                     u" bind to interface %s\n"
 
396
                                     % self.options.interface)
 
397
                else:
 
398
                    raise error
1996
399
        # Only bind(2) the socket if we really need to.
1997
400
        if self.server_address[0] or self.server_address[1]:
1998
401
            if not self.server_address[0]:
1999
 
                if self.address_family == socket.AF_INET6:
2000
 
                    any_address = "::" # in6addr_any
2001
 
                else:
2002
 
                    any_address = "0.0.0.0" # INADDR_ANY
2003
 
                self.server_address = (any_address,
 
402
                in6addr_any = "::"
 
403
                self.server_address = (in6addr_any,
2004
404
                                       self.server_address[1])
2005
 
            elif not self.server_address[1]:
 
405
            elif self.server_address[1] is None:
2006
406
                self.server_address = (self.server_address[0],
2007
407
                                       0)
2008
 
#                 if self.interface:
2009
 
#                     self.server_address = (self.server_address[0],
2010
 
#                                            0, # port
2011
 
#                                            0, # flowinfo
2012
 
#                                            if_nametoindex
2013
 
#                                            (self.interface))
2014
 
            return socketserver.TCPServer.server_bind(self)
2015
 
 
2016
 
 
2017
 
class MandosServer(IPv6_TCPServer):
2018
 
    """Mandos server.
2019
 
    
2020
 
    Attributes:
2021
 
        clients:        set of Client objects
2022
 
        gnutls_priority GnuTLS priority string
2023
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2024
 
    
2025
 
    Assumes a gobject.MainLoop event loop.
2026
 
    """
2027
 
    def __init__(self, server_address, RequestHandlerClass,
2028
 
                 interface=None, use_ipv6=True, clients=None,
2029
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
2030
 
        self.enabled = False
2031
 
        self.clients = clients
2032
 
        if self.clients is None:
2033
 
            self.clients = {}
2034
 
        self.use_dbus = use_dbus
2035
 
        self.gnutls_priority = gnutls_priority
2036
 
        IPv6_TCPServer.__init__(self, server_address,
2037
 
                                RequestHandlerClass,
2038
 
                                interface = interface,
2039
 
                                use_ipv6 = use_ipv6,
2040
 
                                socketfd = socketfd)
2041
 
    def server_activate(self):
2042
 
        if self.enabled:
2043
 
            return socketserver.TCPServer.server_activate(self)
2044
 
    
2045
 
    def enable(self):
2046
 
        self.enabled = True
2047
 
    
2048
 
    def add_pipe(self, parent_pipe, proc):
2049
 
        # Call "handle_ipc" for both data and EOF events
2050
 
        gobject.io_add_watch(parent_pipe.fileno(),
2051
 
                             gobject.IO_IN | gobject.IO_HUP,
2052
 
                             functools.partial(self.handle_ipc,
2053
 
                                               parent_pipe =
2054
 
                                               parent_pipe,
2055
 
                                               proc = proc))
2056
 
    
2057
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2058
 
                   proc = None, client_object=None):
2059
 
        # error, or the other end of multiprocessing.Pipe has closed
2060
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2061
 
            # Wait for other process to exit
2062
 
            proc.join()
2063
 
            return False
2064
 
        
2065
 
        # Read a request from the child
2066
 
        request = parent_pipe.recv()
2067
 
        command = request[0]
2068
 
        
2069
 
        if command == 'init':
2070
 
            fpr = request[1]
2071
 
            address = request[2]
2072
 
            
2073
 
            for c in self.clients.itervalues():
2074
 
                if c.fingerprint == fpr:
2075
 
                    client = c
2076
 
                    break
2077
 
            else:
2078
 
                logger.info("Client not found for fingerprint: %s, ad"
2079
 
                            "dress: %s", fpr, address)
2080
 
                if self.use_dbus:
2081
 
                    # Emit D-Bus signal
2082
 
                    mandos_dbus_service.ClientNotFound(fpr,
2083
 
                                                       address[0])
2084
 
                parent_pipe.send(False)
2085
 
                return False
2086
 
            
2087
 
            gobject.io_add_watch(parent_pipe.fileno(),
2088
 
                                 gobject.IO_IN | gobject.IO_HUP,
2089
 
                                 functools.partial(self.handle_ipc,
2090
 
                                                   parent_pipe =
2091
 
                                                   parent_pipe,
2092
 
                                                   proc = proc,
2093
 
                                                   client_object =
2094
 
                                                   client))
2095
 
            parent_pipe.send(True)
2096
 
            # remove the old hook in favor of the new above hook on
2097
 
            # same fileno
2098
 
            return False
2099
 
        if command == 'funcall':
2100
 
            funcname = request[1]
2101
 
            args = request[2]
2102
 
            kwargs = request[3]
2103
 
            
2104
 
            parent_pipe.send(('data', getattr(client_object,
2105
 
                                              funcname)(*args,
2106
 
                                                         **kwargs)))
2107
 
        
2108
 
        if command == 'getattr':
2109
 
            attrname = request[1]
2110
 
            if callable(client_object.__getattribute__(attrname)):
2111
 
                parent_pipe.send(('function',))
2112
 
            else:
2113
 
                parent_pipe.send(('data', client_object
2114
 
                                  .__getattribute__(attrname)))
2115
 
        
2116
 
        if command == 'setattr':
2117
 
            attrname = request[1]
2118
 
            value = request[2]
2119
 
            setattr(client_object, attrname, value)
2120
 
        
2121
 
        return True
2122
 
 
2123
 
 
2124
 
def rfc3339_duration_to_delta(duration):
2125
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2126
 
    
2127
 
    >>> rfc3339_duration_to_delta("P7D")
2128
 
    datetime.timedelta(7)
2129
 
    >>> rfc3339_duration_to_delta("PT60S")
2130
 
    datetime.timedelta(0, 60)
2131
 
    >>> rfc3339_duration_to_delta("PT60M")
2132
 
    datetime.timedelta(0, 3600)
2133
 
    >>> rfc3339_duration_to_delta("PT24H")
2134
 
    datetime.timedelta(1)
2135
 
    >>> rfc3339_duration_to_delta("P1W")
2136
 
    datetime.timedelta(7)
2137
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2138
 
    datetime.timedelta(0, 330)
2139
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2140
 
    datetime.timedelta(1, 200)
2141
 
    """
2142
 
    
2143
 
    # Parsing an RFC 3339 duration with regular expressions is not
2144
 
    # possible - there would have to be multiple places for the same
2145
 
    # values, like seconds.  The current code, while more esoteric, is
2146
 
    # cleaner without depending on a parsing library.  If Python had a
2147
 
    # built-in library for parsing we would use it, but we'd like to
2148
 
    # avoid excessive use of external libraries.
2149
 
    
2150
 
    # New type for defining tokens, syntax, and semantics all-in-one
2151
 
    Token = collections.namedtuple("Token",
2152
 
                                   ("regexp", # To match token; if
2153
 
                                              # "value" is not None,
2154
 
                                              # must have a "group"
2155
 
                                              # containing digits
2156
 
                                    "value",  # datetime.timedelta or
2157
 
                                              # None
2158
 
                                    "followers")) # Tokens valid after
2159
 
                                                  # this token
2160
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2161
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2162
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2163
 
    token_second = Token(re.compile(r"(\d+)S"),
2164
 
                         datetime.timedelta(seconds=1),
2165
 
                         frozenset((token_end,)))
2166
 
    token_minute = Token(re.compile(r"(\d+)M"),
2167
 
                         datetime.timedelta(minutes=1),
2168
 
                         frozenset((token_second, token_end)))
2169
 
    token_hour = Token(re.compile(r"(\d+)H"),
2170
 
                       datetime.timedelta(hours=1),
2171
 
                       frozenset((token_minute, token_end)))
2172
 
    token_time = Token(re.compile(r"T"),
2173
 
                       None,
2174
 
                       frozenset((token_hour, token_minute,
2175
 
                                  token_second)))
2176
 
    token_day = Token(re.compile(r"(\d+)D"),
2177
 
                      datetime.timedelta(days=1),
2178
 
                      frozenset((token_time, token_end)))
2179
 
    token_month = Token(re.compile(r"(\d+)M"),
2180
 
                        datetime.timedelta(weeks=4),
2181
 
                        frozenset((token_day, token_end)))
2182
 
    token_year = Token(re.compile(r"(\d+)Y"),
2183
 
                       datetime.timedelta(weeks=52),
2184
 
                       frozenset((token_month, token_end)))
2185
 
    token_week = Token(re.compile(r"(\d+)W"),
2186
 
                       datetime.timedelta(weeks=1),
2187
 
                       frozenset((token_end,)))
2188
 
    token_duration = Token(re.compile(r"P"), None,
2189
 
                           frozenset((token_year, token_month,
2190
 
                                      token_day, token_time,
2191
 
                                      token_week))),
2192
 
    # Define starting values
2193
 
    value = datetime.timedelta() # Value so far
2194
 
    found_token = None
2195
 
    followers = frozenset(token_duration,) # Following valid tokens
2196
 
    s = duration                # String left to parse
2197
 
    # Loop until end token is found
2198
 
    while found_token is not token_end:
2199
 
        # Search for any currently valid tokens
2200
 
        for token in followers:
2201
 
            match = token.regexp.match(s)
2202
 
            if match is not None:
2203
 
                # Token found
2204
 
                if token.value is not None:
2205
 
                    # Value found, parse digits
2206
 
                    factor = int(match.group(1), 10)
2207
 
                    # Add to value so far
2208
 
                    value += factor * token.value
2209
 
                # Strip token from string
2210
 
                s = token.regexp.sub("", s, 1)
2211
 
                # Go to found token
2212
 
                found_token = token
2213
 
                # Set valid next tokens
2214
 
                followers = found_token.followers
2215
 
                break
2216
 
        else:
2217
 
            # No currently valid tokens were found
2218
 
            raise ValueError("Invalid RFC 3339 duration")
2219
 
    # End token found
2220
 
    return value
 
408
            return super(type(self), self).server_bind()
2221
409
 
2222
410
 
2223
411
def string_to_delta(interval):
2224
412
    """Parse a string and return a datetime.timedelta
2225
 
    
 
413
 
2226
414
    >>> string_to_delta('7d')
2227
415
    datetime.timedelta(7)
2228
416
    >>> string_to_delta('60s')
2231
419
    datetime.timedelta(0, 3600)
2232
420
    >>> string_to_delta('24h')
2233
421
    datetime.timedelta(1)
2234
 
    >>> string_to_delta('1w')
 
422
    >>> string_to_delta(u'1w')
2235
423
    datetime.timedelta(7)
2236
 
    >>> string_to_delta('5m 30s')
2237
 
    datetime.timedelta(0, 330)
2238
424
    """
2239
 
    
2240
 
    try:
2241
 
        return rfc3339_duration_to_delta(interval)
2242
 
    except ValueError:
2243
 
        pass
2244
 
    
2245
 
    timevalue = datetime.timedelta(0)
2246
 
    for s in interval.split():
2247
 
        try:
2248
 
            suffix = unicode(s[-1])
2249
 
            value = int(s[:-1])
2250
 
            if suffix == "d":
2251
 
                delta = datetime.timedelta(value)
2252
 
            elif suffix == "s":
2253
 
                delta = datetime.timedelta(0, value)
2254
 
            elif suffix == "m":
2255
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2256
 
            elif suffix == "h":
2257
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2258
 
            elif suffix == "w":
2259
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2260
 
            else:
2261
 
                raise ValueError("Unknown suffix {0!r}"
2262
 
                                 .format(suffix))
2263
 
        except IndexError as e:
2264
 
            raise ValueError(*(e.args))
2265
 
        timevalue += delta
2266
 
    return timevalue
2267
 
 
2268
 
 
2269
 
def daemon(nochdir = False, noclose = False):
2270
 
    """See daemon(3).  Standard BSD Unix function.
2271
 
    
2272
 
    This should really exist as os.daemon, but it doesn't (yet)."""
2273
 
    if os.fork():
2274
 
        sys.exit()
2275
 
    os.setsid()
2276
 
    if not nochdir:
2277
 
        os.chdir("/")
2278
 
    if os.fork():
2279
 
        sys.exit()
2280
 
    if not noclose:
2281
 
        # Close all standard open file descriptors
2282
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2283
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2284
 
            raise OSError(errno.ENODEV,
2285
 
                          "{0} not a character device"
2286
 
                          .format(os.devnull))
2287
 
        os.dup2(null, sys.stdin.fileno())
2288
 
        os.dup2(null, sys.stdout.fileno())
2289
 
        os.dup2(null, sys.stderr.fileno())
2290
 
        if null > 2:
2291
 
            os.close(null)
2292
 
 
2293
 
 
2294
 
def main():
2295
 
    
2296
 
    ##################################################################
2297
 
    # Parsing of options, both command line and config file
2298
 
    
2299
 
    parser = argparse.ArgumentParser()
2300
 
    parser.add_argument("-v", "--version", action="version",
2301
 
                        version = "%(prog)s {0}".format(version),
2302
 
                        help="show version number and exit")
2303
 
    parser.add_argument("-i", "--interface", metavar="IF",
2304
 
                        help="Bind to interface IF")
2305
 
    parser.add_argument("-a", "--address",
2306
 
                        help="Address to listen for requests on")
2307
 
    parser.add_argument("-p", "--port", type=int,
2308
 
                        help="Port number to receive requests on")
2309
 
    parser.add_argument("--check", action="store_true",
2310
 
                        help="Run self-test")
2311
 
    parser.add_argument("--debug", action="store_true",
2312
 
                        help="Debug mode; run in foreground and log"
2313
 
                        " to terminal", default=None)
2314
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2315
 
                        help="Debug level for stdout output")
2316
 
    parser.add_argument("--priority", help="GnuTLS"
2317
 
                        " priority string (see GnuTLS documentation)")
2318
 
    parser.add_argument("--servicename",
2319
 
                        metavar="NAME", help="Zeroconf service name")
2320
 
    parser.add_argument("--configdir",
2321
 
                        default="/etc/mandos", metavar="DIR",
2322
 
                        help="Directory to search for configuration"
2323
 
                        " files")
2324
 
    parser.add_argument("--no-dbus", action="store_false",
2325
 
                        dest="use_dbus", help="Do not provide D-Bus"
2326
 
                        " system bus interface", default=None)
2327
 
    parser.add_argument("--no-ipv6", action="store_false",
2328
 
                        dest="use_ipv6", help="Do not use IPv6",
2329
 
                        default=None)
2330
 
    parser.add_argument("--no-restore", action="store_false",
2331
 
                        dest="restore", help="Do not restore stored"
2332
 
                        " state", default=None)
2333
 
    parser.add_argument("--socket", type=int,
2334
 
                        help="Specify a file descriptor to a network"
2335
 
                        " socket to use instead of creating one")
2336
 
    parser.add_argument("--statedir", metavar="DIR",
2337
 
                        help="Directory to save/restore state in")
2338
 
    parser.add_argument("--foreground", action="store_true",
2339
 
                        help="Run in foreground", default=None)
2340
 
    parser.add_argument("--no-zeroconf", action="store_false",
2341
 
                        dest="zeroconf", help="Do not use Zeroconf",
2342
 
                        default=None)
2343
 
    
2344
 
    options = parser.parse_args()
 
425
    try:
 
426
        suffix=unicode(interval[-1])
 
427
        value=int(interval[:-1])
 
428
        if suffix == u"d":
 
429
            delta = datetime.timedelta(value)
 
430
        elif suffix == u"s":
 
431
            delta = datetime.timedelta(0, value)
 
432
        elif suffix == u"m":
 
433
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
434
        elif suffix == u"h":
 
435
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
436
        elif suffix == u"w":
 
437
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
438
        else:
 
439
            raise ValueError
 
440
    except (ValueError, IndexError):
 
441
        raise ValueError
 
442
    return delta
 
443
 
 
444
 
 
445
def add_service():
 
446
    """From the Avahi server example code"""
 
447
    global group, serviceName, serviceType, servicePort, serviceTXT, \
 
448
           domain, host
 
449
    if group is None:
 
450
        group = dbus.Interface(
 
451
                bus.get_object( avahi.DBUS_NAME,
 
452
                                server.EntryGroupNew()),
 
453
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
454
        group.connect_to_signal('StateChanged',
 
455
                                entry_group_state_changed)
 
456
    if debug:
 
457
        sys.stderr.write(u"Adding service '%s' of type '%s' ...\n"
 
458
                         % (serviceName, serviceType))
 
459
    
 
460
    group.AddService(
 
461
            serviceInterface,           # interface
 
462
            avahi.PROTO_INET6,          # protocol
 
463
            dbus.UInt32(0),             # flags
 
464
            serviceName, serviceType,
 
465
            domain, host,
 
466
            dbus.UInt16(servicePort),
 
467
            avahi.string_array_to_txt_array(serviceTXT))
 
468
    group.Commit()
 
469
 
 
470
 
 
471
def remove_service():
 
472
    """From the Avahi server example code"""
 
473
    global group
 
474
    
 
475
    if not group is None:
 
476
        group.Reset()
 
477
 
 
478
 
 
479
def server_state_changed(state):
 
480
    """From the Avahi server example code"""
 
481
    if state == avahi.SERVER_COLLISION:
 
482
        sys.stderr.write(u"WARNING: Server name collision\n")
 
483
        remove_service()
 
484
    elif state == avahi.SERVER_RUNNING:
 
485
        add_service()
 
486
 
 
487
 
 
488
def entry_group_state_changed(state, error):
 
489
    """From the Avahi server example code"""
 
490
    global serviceName, server, rename_count
 
491
    
 
492
    if debug:
 
493
        sys.stderr.write(u"state change: %i\n" % state)
 
494
    
 
495
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
496
        if debug:
 
497
            sys.stderr.write(u"Service established.\n")
 
498
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
499
        
 
500
        rename_count = rename_count - 1
 
501
        if rename_count > 0:
 
502
            name = server.GetAlternativeServiceName(name)
 
503
            sys.stderr.write(u"WARNING: Service name collision, "
 
504
                             u"changing name to '%s' ...\n" % name)
 
505
            remove_service()
 
506
            add_service()
 
507
            
 
508
        else:
 
509
            sys.stderr.write(u"ERROR: No suitable service name found "
 
510
                             u"after %i retries, exiting.\n"
 
511
                             % n_rename)
 
512
            main_loop.quit()
 
513
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
514
        sys.stderr.write(u"Error in group state changed %s\n"
 
515
                         % unicode(error))
 
516
        main_loop.quit()
 
517
        return
 
518
 
 
519
 
 
520
def if_nametoindex(interface):
 
521
    """Call the C function if_nametoindex()"""
 
522
    try:
 
523
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
524
        return libc.if_nametoindex(interface)
 
525
    except (OSError, AttributeError):
 
526
        if "struct" not in sys.modules:
 
527
            import struct
 
528
        if "fcntl" not in sys.modules:
 
529
            import fcntl
 
530
        SIOCGIFINDEX = 0x8933      # From /usr/include/linux/sockios.h
 
531
        s = socket.socket()
 
532
        ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
533
                            struct.pack("16s16x", interface))
 
534
        s.close()
 
535
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
536
        return interface_index
 
537
 
 
538
 
 
539
if __name__ == '__main__':
 
540
    parser = OptionParser()
 
541
    parser.add_option("-i", "--interface", type="string",
 
542
                      default=None, metavar="IF",
 
543
                      help="Bind to interface IF")
 
544
    parser.add_option("--cert", type="string", default="cert.pem",
 
545
                      metavar="FILE",
 
546
                      help="Public key certificate PEM file to use")
 
547
    parser.add_option("--key", type="string", default="key.pem",
 
548
                      metavar="FILE",
 
549
                      help="Private key PEM file to use")
 
550
    parser.add_option("--ca", type="string", default="ca.pem",
 
551
                      metavar="FILE",
 
552
                      help="Certificate Authority certificate PEM file to use")
 
553
    parser.add_option("--crl", type="string", default="crl.pem",
 
554
                      metavar="FILE",
 
555
                      help="Certificate Revokation List PEM file to use")
 
556
    parser.add_option("-p", "--port", type="int", default=None,
 
557
                      help="Port number to receive requests on")
 
558
    parser.add_option("--timeout", type="string", # Parsed later
 
559
                      default="1h",
 
560
                      help="Amount of downtime allowed for clients")
 
561
    parser.add_option("--interval", type="string", # Parsed later
 
562
                      default="5m",
 
563
                      help="How often to check that a client is up")
 
564
    parser.add_option("--check", action="store_true", default=False,
 
565
                      help="Run self-test")
 
566
    parser.add_option("--debug", action="store_true", default=False,
 
567
                      help="Debug mode")
 
568
    (options, args) = parser.parse_args()
2345
569
    
2346
570
    if options.check:
2347
571
        import doctest
2348
 
        fail_count, test_count = doctest.testmod()
2349
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2350
 
    
2351
 
    # Default values for config file for server-global settings
2352
 
    server_defaults = { "interface": "",
2353
 
                        "address": "",
2354
 
                        "port": "",
2355
 
                        "debug": "False",
2356
 
                        "priority":
2357
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2358
 
                        "servicename": "Mandos",
2359
 
                        "use_dbus": "True",
2360
 
                        "use_ipv6": "True",
2361
 
                        "debuglevel": "",
2362
 
                        "restore": "True",
2363
 
                        "socket": "",
2364
 
                        "statedir": "/var/lib/mandos",
2365
 
                        "foreground": "False",
2366
 
                        "zeroconf": "True",
2367
 
                        }
2368
 
    
2369
 
    # Parse config file for server-global settings
2370
 
    server_config = configparser.SafeConfigParser(server_defaults)
2371
 
    del server_defaults
2372
 
    server_config.read(os.path.join(options.configdir,
2373
 
                                    "mandos.conf"))
2374
 
    # Convert the SafeConfigParser object to a dict
2375
 
    server_settings = server_config.defaults()
2376
 
    # Use the appropriate methods on the non-string config options
2377
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2378
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2379
 
                                                           option)
2380
 
    if server_settings["port"]:
2381
 
        server_settings["port"] = server_config.getint("DEFAULT",
2382
 
                                                       "port")
2383
 
    if server_settings["socket"]:
2384
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2385
 
                                                         "socket")
2386
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2387
 
        # over with an opened os.devnull.  But we don't want this to
2388
 
        # happen with a supplied network socket.
2389
 
        if 0 <= server_settings["socket"] <= 2:
2390
 
            server_settings["socket"] = os.dup(server_settings
2391
 
                                               ["socket"])
2392
 
    del server_config
2393
 
    
2394
 
    # Override the settings from the config file with command line
2395
 
    # options, if set.
2396
 
    for option in ("interface", "address", "port", "debug",
2397
 
                   "priority", "servicename", "configdir",
2398
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2399
 
                   "statedir", "socket", "foreground", "zeroconf"):
2400
 
        value = getattr(options, option)
2401
 
        if value is not None:
2402
 
            server_settings[option] = value
2403
 
    del options
2404
 
    # Force all strings to be unicode
2405
 
    for option in server_settings.keys():
2406
 
        if type(server_settings[option]) is str:
2407
 
            server_settings[option] = unicode(server_settings[option])
2408
 
    # Force all boolean options to be boolean
2409
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2410
 
                   "foreground", "zeroconf"):
2411
 
        server_settings[option] = bool(server_settings[option])
2412
 
    # Debug implies foreground
2413
 
    if server_settings["debug"]:
2414
 
        server_settings["foreground"] = True
2415
 
    # Now we have our good server settings in "server_settings"
2416
 
    
2417
 
    ##################################################################
2418
 
    
2419
 
    if (not server_settings["zeroconf"] and
2420
 
        not (server_settings["port"]
2421
 
             or server_settings["socket"] != "")):
2422
 
            parser.error("Needs port or socket to work without"
2423
 
                         " Zeroconf")
2424
 
    
2425
 
    # For convenience
2426
 
    debug = server_settings["debug"]
2427
 
    debuglevel = server_settings["debuglevel"]
2428
 
    use_dbus = server_settings["use_dbus"]
2429
 
    use_ipv6 = server_settings["use_ipv6"]
2430
 
    stored_state_path = os.path.join(server_settings["statedir"],
2431
 
                                     stored_state_file)
2432
 
    foreground = server_settings["foreground"]
2433
 
    zeroconf = server_settings["zeroconf"]
2434
 
    
2435
 
    if debug:
2436
 
        initlogger(debug, logging.DEBUG)
2437
 
    else:
2438
 
        if not debuglevel:
2439
 
            initlogger(debug)
2440
 
        else:
2441
 
            level = getattr(logging, debuglevel.upper())
2442
 
            initlogger(debug, level)
2443
 
    
2444
 
    if server_settings["servicename"] != "Mandos":
2445
 
        syslogger.setFormatter(logging.Formatter
2446
 
                               ('Mandos ({0}) [%(process)d]:'
2447
 
                                ' %(levelname)s: %(message)s'
2448
 
                                .format(server_settings
2449
 
                                        ["servicename"])))
2450
 
    
2451
 
    # Parse config file with clients
2452
 
    client_config = configparser.SafeConfigParser(Client
2453
 
                                                  .client_defaults)
2454
 
    client_config.read(os.path.join(server_settings["configdir"],
2455
 
                                    "clients.conf"))
2456
 
    
2457
 
    global mandos_dbus_service
2458
 
    mandos_dbus_service = None
2459
 
    
2460
 
    socketfd = None
2461
 
    if server_settings["socket"] != "":
2462
 
        socketfd = server_settings["socket"]
2463
 
    tcp_server = MandosServer((server_settings["address"],
2464
 
                               server_settings["port"]),
2465
 
                              ClientHandler,
2466
 
                              interface=(server_settings["interface"]
2467
 
                                         or None),
2468
 
                              use_ipv6=use_ipv6,
2469
 
                              gnutls_priority=
2470
 
                              server_settings["priority"],
2471
 
                              use_dbus=use_dbus,
2472
 
                              socketfd=socketfd)
2473
 
    if not foreground:
2474
 
        pidfilename = "/run/mandos.pid"
2475
 
        if not os.path.isdir("/run/."):
2476
 
            pidfilename = "/var/run/mandos.pid"
2477
 
        pidfile = None
2478
 
        try:
2479
 
            pidfile = open(pidfilename, "w")
2480
 
        except IOError as e:
2481
 
            logger.error("Could not open file %r", pidfilename,
2482
 
                         exc_info=e)
2483
 
    
2484
 
    for name in ("_mandos", "mandos", "nobody"):
2485
 
        try:
2486
 
            uid = pwd.getpwnam(name).pw_uid
2487
 
            gid = pwd.getpwnam(name).pw_gid
2488
 
            break
2489
 
        except KeyError:
2490
 
            continue
2491
 
    else:
2492
 
        uid = 65534
2493
 
        gid = 65534
2494
 
    try:
2495
 
        os.setgid(gid)
2496
 
        os.setuid(uid)
2497
 
    except OSError as error:
2498
 
        if error.errno != errno.EPERM:
2499
 
            raise
2500
 
    
2501
 
    if debug:
2502
 
        # Enable all possible GnuTLS debugging
2503
 
        
2504
 
        # "Use a log level over 10 to enable all debugging options."
2505
 
        # - GnuTLS manual
2506
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2507
 
        
2508
 
        @gnutls.library.types.gnutls_log_func
2509
 
        def debug_gnutls(level, string):
2510
 
            logger.debug("GnuTLS: %s", string[:-1])
2511
 
        
2512
 
        (gnutls.library.functions
2513
 
         .gnutls_global_set_log_function(debug_gnutls))
2514
 
        
2515
 
        # Redirect stdin so all checkers get /dev/null
2516
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2517
 
        os.dup2(null, sys.stdin.fileno())
2518
 
        if null > 2:
2519
 
            os.close(null)
2520
 
    
2521
 
    # Need to fork before connecting to D-Bus
2522
 
    if not foreground:
2523
 
        # Close all input and output, do double fork, etc.
2524
 
        daemon()
2525
 
    
2526
 
    # multiprocessing will use threads, so before we use gobject we
2527
 
    # need to inform gobject that threads will be used.
2528
 
    gobject.threads_init()
2529
 
    
2530
 
    global main_loop
2531
 
    # From the Avahi example code
2532
 
    DBusGMainLoop(set_as_default=True)
 
572
        doctest.testmod()
 
573
        sys.exit()
 
574
    
 
575
    # Parse the time arguments
 
576
    try:
 
577
        options.timeout = string_to_delta(options.timeout)
 
578
    except ValueError:
 
579
        parser.error("option --timeout: Unparseable time")
 
580
    try:
 
581
        options.interval = string_to_delta(options.interval)
 
582
    except ValueError:
 
583
        parser.error("option --interval: Unparseable time")
 
584
    
 
585
    # Parse config file
 
586
    defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
 
587
    client_config = ConfigParser.SafeConfigParser(defaults)
 
588
    #client_config.readfp(open("secrets.conf"), "secrets.conf")
 
589
    client_config.read("mandos-clients.conf")
 
590
    
 
591
    # From the Avahi server example code
 
592
    DBusGMainLoop(set_as_default=True )
2533
593
    main_loop = gobject.MainLoop()
2534
594
    bus = dbus.SystemBus()
2535
 
    # End of Avahi example code
2536
 
    if use_dbus:
2537
 
        try:
2538
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2539
 
                                            bus, do_not_queue=True)
2540
 
            old_bus_name = (dbus.service.BusName
2541
 
                            ("se.bsnet.fukt.Mandos", bus,
2542
 
                             do_not_queue=True))
2543
 
        except dbus.exceptions.NameExistsException as e:
2544
 
            logger.error("Disabling D-Bus:", exc_info=e)
2545
 
            use_dbus = False
2546
 
            server_settings["use_dbus"] = False
2547
 
            tcp_server.use_dbus = False
2548
 
    if zeroconf:
2549
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2550
 
        service = AvahiServiceToSyslog(name =
2551
 
                                       server_settings["servicename"],
2552
 
                                       servicetype = "_mandos._tcp",
2553
 
                                       protocol = protocol, bus = bus)
2554
 
        if server_settings["interface"]:
2555
 
            service.interface = (if_nametoindex
2556
 
                                 (str(server_settings["interface"])))
2557
 
    
2558
 
    global multiprocessing_manager
2559
 
    multiprocessing_manager = multiprocessing.Manager()
2560
 
    
2561
 
    client_class = Client
2562
 
    if use_dbus:
2563
 
        client_class = functools.partial(ClientDBus, bus = bus)
2564
 
    
2565
 
    client_settings = Client.config_parser(client_config)
2566
 
    old_client_settings = {}
2567
 
    clients_data = {}
2568
 
    
2569
 
    # This is used to redirect stdout and stderr for checker processes
2570
 
    global wnull
2571
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2572
 
    # Only used if server is running in foreground but not in debug
2573
 
    # mode
2574
 
    if debug or not foreground:
2575
 
        wnull.close()
2576
 
    
2577
 
    # Get client data and settings from last running state.
2578
 
    if server_settings["restore"]:
2579
 
        try:
2580
 
            with open(stored_state_path, "rb") as stored_state:
2581
 
                clients_data, old_client_settings = (pickle.load
2582
 
                                                     (stored_state))
2583
 
            os.remove(stored_state_path)
2584
 
        except IOError as e:
2585
 
            if e.errno == errno.ENOENT:
2586
 
                logger.warning("Could not load persistent state: {0}"
2587
 
                                .format(os.strerror(e.errno)))
2588
 
            else:
2589
 
                logger.critical("Could not load persistent state:",
2590
 
                                exc_info=e)
2591
 
                raise
2592
 
        except EOFError as e:
2593
 
            logger.warning("Could not load persistent state: "
2594
 
                           "EOFError:", exc_info=e)
2595
 
    
2596
 
    with PGPEngine() as pgp:
2597
 
        for client_name, client in clients_data.iteritems():
2598
 
            # Skip removed clients
2599
 
            if client_name not in client_settings:
2600
 
                continue
2601
 
            
2602
 
            # Decide which value to use after restoring saved state.
2603
 
            # We have three different values: Old config file,
2604
 
            # new config file, and saved state.
2605
 
            # New config value takes precedence if it differs from old
2606
 
            # config value, otherwise use saved state.
2607
 
            for name, value in client_settings[client_name].items():
2608
 
                try:
2609
 
                    # For each value in new config, check if it
2610
 
                    # differs from the old config value (Except for
2611
 
                    # the "secret" attribute)
2612
 
                    if (name != "secret" and
2613
 
                        value != old_client_settings[client_name]
2614
 
                        [name]):
2615
 
                        client[name] = value
2616
 
                except KeyError:
2617
 
                    pass
2618
 
            
2619
 
            # Clients who has passed its expire date can still be
2620
 
            # enabled if its last checker was successful.  Clients
2621
 
            # whose checker succeeded before we stored its state is
2622
 
            # assumed to have successfully run all checkers during
2623
 
            # downtime.
2624
 
            if client["enabled"]:
2625
 
                if datetime.datetime.utcnow() >= client["expires"]:
2626
 
                    if not client["last_checked_ok"]:
2627
 
                        logger.warning(
2628
 
                            "disabling client {0} - Client never "
2629
 
                            "performed a successful checker"
2630
 
                            .format(client_name))
2631
 
                        client["enabled"] = False
2632
 
                    elif client["last_checker_status"] != 0:
2633
 
                        logger.warning(
2634
 
                            "disabling client {0} - Client "
2635
 
                            "last checker failed with error code {1}"
2636
 
                            .format(client_name,
2637
 
                                    client["last_checker_status"]))
2638
 
                        client["enabled"] = False
2639
 
                    else:
2640
 
                        client["expires"] = (datetime.datetime
2641
 
                                             .utcnow()
2642
 
                                             + client["timeout"])
2643
 
                        logger.debug("Last checker succeeded,"
2644
 
                                     " keeping {0} enabled"
2645
 
                                     .format(client_name))
2646
 
            try:
2647
 
                client["secret"] = (
2648
 
                    pgp.decrypt(client["encrypted_secret"],
2649
 
                                client_settings[client_name]
2650
 
                                ["secret"]))
2651
 
            except PGPError:
2652
 
                # If decryption fails, we use secret from new settings
2653
 
                logger.debug("Failed to decrypt {0} old secret"
2654
 
                             .format(client_name))
2655
 
                client["secret"] = (
2656
 
                    client_settings[client_name]["secret"])
2657
 
    
2658
 
    # Add/remove clients based on new changes made to config
2659
 
    for client_name in (set(old_client_settings)
2660
 
                        - set(client_settings)):
2661
 
        del clients_data[client_name]
2662
 
    for client_name in (set(client_settings)
2663
 
                        - set(old_client_settings)):
2664
 
        clients_data[client_name] = client_settings[client_name]
2665
 
    
2666
 
    # Create all client objects
2667
 
    for client_name, client in clients_data.iteritems():
2668
 
        tcp_server.clients[client_name] = client_class(
2669
 
            name = client_name, settings = client,
2670
 
            server_settings = server_settings)
2671
 
    
2672
 
    if not tcp_server.clients:
2673
 
        logger.warning("No clients defined")
2674
 
    
2675
 
    if not foreground:
2676
 
        if pidfile is not None:
2677
 
            try:
2678
 
                with pidfile:
2679
 
                    pid = os.getpid()
2680
 
                    pidfile.write(str(pid) + "\n".encode("utf-8"))
2681
 
            except IOError:
2682
 
                logger.error("Could not write to file %r with PID %d",
2683
 
                             pidfilename, pid)
2684
 
        del pidfile
2685
 
        del pidfilename
2686
 
    
2687
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2688
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2689
 
    
2690
 
    if use_dbus:
2691
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2692
 
                                        "se.bsnet.fukt.Mandos"})
2693
 
        class MandosDBusService(DBusObjectWithProperties):
2694
 
            """A D-Bus proxy object"""
2695
 
            def __init__(self):
2696
 
                dbus.service.Object.__init__(self, bus, "/")
2697
 
            _interface = "se.recompile.Mandos"
2698
 
            
2699
 
            @dbus_interface_annotations(_interface)
2700
 
            def _foo(self):
2701
 
                return { "org.freedesktop.DBus.Property"
2702
 
                         ".EmitsChangedSignal":
2703
 
                             "false"}
2704
 
            
2705
 
            @dbus.service.signal(_interface, signature="o")
2706
 
            def ClientAdded(self, objpath):
2707
 
                "D-Bus signal"
2708
 
                pass
2709
 
            
2710
 
            @dbus.service.signal(_interface, signature="ss")
2711
 
            def ClientNotFound(self, fingerprint, address):
2712
 
                "D-Bus signal"
2713
 
                pass
2714
 
            
2715
 
            @dbus.service.signal(_interface, signature="os")
2716
 
            def ClientRemoved(self, objpath, name):
2717
 
                "D-Bus signal"
2718
 
                pass
2719
 
            
2720
 
            @dbus.service.method(_interface, out_signature="ao")
2721
 
            def GetAllClients(self):
2722
 
                "D-Bus method"
2723
 
                return dbus.Array(c.dbus_object_path
2724
 
                                  for c in
2725
 
                                  tcp_server.clients.itervalues())
2726
 
            
2727
 
            @dbus.service.method(_interface,
2728
 
                                 out_signature="a{oa{sv}}")
2729
 
            def GetAllClientsWithProperties(self):
2730
 
                "D-Bus method"
2731
 
                return dbus.Dictionary(
2732
 
                    ((c.dbus_object_path, c.GetAll(""))
2733
 
                     for c in tcp_server.clients.itervalues()),
2734
 
                    signature="oa{sv}")
2735
 
            
2736
 
            @dbus.service.method(_interface, in_signature="o")
2737
 
            def RemoveClient(self, object_path):
2738
 
                "D-Bus method"
2739
 
                for c in tcp_server.clients.itervalues():
2740
 
                    if c.dbus_object_path == object_path:
2741
 
                        del tcp_server.clients[c.name]
2742
 
                        c.remove_from_connection()
2743
 
                        # Don't signal anything except ClientRemoved
2744
 
                        c.disable(quiet=True)
2745
 
                        # Emit D-Bus signal
2746
 
                        self.ClientRemoved(object_path, c.name)
2747
 
                        return
2748
 
                raise KeyError(object_path)
2749
 
            
2750
 
            del _interface
2751
 
        
2752
 
        mandos_dbus_service = MandosDBusService()
2753
 
    
2754
 
    def cleanup():
2755
 
        "Cleanup function; run on exit"
2756
 
        if zeroconf:
2757
 
            service.cleanup()
2758
 
        
2759
 
        multiprocessing.active_children()
2760
 
        wnull.close()
2761
 
        if not (tcp_server.clients or client_settings):
2762
 
            return
2763
 
        
2764
 
        # Store client before exiting. Secrets are encrypted with key
2765
 
        # based on what config file has. If config file is
2766
 
        # removed/edited, old secret will thus be unrecovable.
2767
 
        clients = {}
2768
 
        with PGPEngine() as pgp:
2769
 
            for client in tcp_server.clients.itervalues():
2770
 
                key = client_settings[client.name]["secret"]
2771
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2772
 
                                                      key)
2773
 
                client_dict = {}
2774
 
                
2775
 
                # A list of attributes that can not be pickled
2776
 
                # + secret.
2777
 
                exclude = set(("bus", "changedstate", "secret",
2778
 
                               "checker", "server_settings"))
2779
 
                for name, typ in (inspect.getmembers
2780
 
                                  (dbus.service.Object)):
2781
 
                    exclude.add(name)
2782
 
                
2783
 
                client_dict["encrypted_secret"] = (client
2784
 
                                                   .encrypted_secret)
2785
 
                for attr in client.client_structure:
2786
 
                    if attr not in exclude:
2787
 
                        client_dict[attr] = getattr(client, attr)
2788
 
                
2789
 
                clients[client.name] = client_dict
2790
 
                del client_settings[client.name]["secret"]
2791
 
        
2792
 
        try:
2793
 
            with (tempfile.NamedTemporaryFile
2794
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2795
 
                   dir=os.path.dirname(stored_state_path),
2796
 
                   delete=False)) as stored_state:
2797
 
                pickle.dump((clients, client_settings), stored_state)
2798
 
                tempname=stored_state.name
2799
 
            os.rename(tempname, stored_state_path)
2800
 
        except (IOError, OSError) as e:
2801
 
            if not debug:
2802
 
                try:
2803
 
                    os.remove(tempname)
2804
 
                except NameError:
2805
 
                    pass
2806
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2807
 
                logger.warning("Could not save persistent state: {0}"
2808
 
                               .format(os.strerror(e.errno)))
2809
 
            else:
2810
 
                logger.warning("Could not save persistent state:",
2811
 
                               exc_info=e)
2812
 
                raise
2813
 
        
2814
 
        # Delete all clients, and settings from config
2815
 
        while tcp_server.clients:
2816
 
            name, client = tcp_server.clients.popitem()
2817
 
            if use_dbus:
2818
 
                client.remove_from_connection()
2819
 
            # Don't signal anything except ClientRemoved
2820
 
            client.disable(quiet=True)
2821
 
            if use_dbus:
2822
 
                # Emit D-Bus signal
2823
 
                mandos_dbus_service.ClientRemoved(client
2824
 
                                                  .dbus_object_path,
2825
 
                                                  client.name)
2826
 
        client_settings.clear()
2827
 
    
2828
 
    atexit.register(cleanup)
2829
 
    
2830
 
    for client in tcp_server.clients.itervalues():
2831
 
        if use_dbus:
2832
 
            # Emit D-Bus signal
2833
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2834
 
        # Need to initiate checking of clients
2835
 
        if client.enabled:
2836
 
            client.init_checker()
2837
 
    
2838
 
    tcp_server.enable()
2839
 
    tcp_server.server_activate()
2840
 
    
2841
 
    # Find out what port we got
2842
 
    if zeroconf:
2843
 
        service.port = tcp_server.socket.getsockname()[1]
2844
 
    if use_ipv6:
2845
 
        logger.info("Now listening on address %r, port %d,"
2846
 
                    " flowinfo %d, scope_id %d",
2847
 
                    *tcp_server.socket.getsockname())
2848
 
    else:                       # IPv4
2849
 
        logger.info("Now listening on address %r, port %d",
2850
 
                    *tcp_server.socket.getsockname())
2851
 
    
2852
 
    #service.interface = tcp_server.socket.getsockname()[3]
2853
 
    
 
595
    server = dbus.Interface(
 
596
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
597
            avahi.DBUS_INTERFACE_SERVER )
 
598
    # End of Avahi example code
 
599
    
 
600
    debug = options.debug
 
601
    
 
602
    clients = Set()
 
603
    def remove_from_clients(client):
 
604
        clients.remove(client)
 
605
        if not clients:
 
606
            if debug:
 
607
                sys.stderr.write(u"No clients left, exiting\n")
 
608
            main_loop.quit()
 
609
    
 
610
    clients.update(Set(Client(name=section, options=options,
 
611
                              stop_hook = remove_from_clients,
 
612
                              **(dict(client_config\
 
613
                                      .items(section))))
 
614
                       for section in client_config.sections()))
 
615
    for client in clients:
 
616
        client.start()
 
617
    
 
618
    tcp_server = IPv6_TCPServer((None, options.port),
 
619
                                tcp_handler,
 
620
                                options=options,
 
621
                                clients=clients)
 
622
    # Find out what random port we got
 
623
    servicePort = tcp_server.socket.getsockname()[1]
 
624
    if debug:
 
625
        sys.stderr.write(u"Now listening on port %d\n" % servicePort)
 
626
    
 
627
    if options.interface is not None:
 
628
        serviceInterface = if_nametoindex(options.interface)
 
629
    
 
630
    # From the Avahi server example code
 
631
    server.connect_to_signal("StateChanged", server_state_changed)
 
632
    server_state_changed(server.GetState())
 
633
    # End of Avahi example code
 
634
    
 
635
    gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
 
636
                         lambda *args, **kwargs:
 
637
                         tcp_server.handle_request(*args[2:],
 
638
                                                   **kwargs) or True)
2854
639
    try:
2855
 
        if zeroconf:
2856
 
            # From the Avahi example code
2857
 
            try:
2858
 
                service.activate()
2859
 
            except dbus.exceptions.DBusException as error:
2860
 
                logger.critical("D-Bus Exception", exc_info=error)
2861
 
                cleanup()
2862
 
                sys.exit(1)
2863
 
            # End of Avahi example code
2864
 
        
2865
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2866
 
                             lambda *args, **kwargs:
2867
 
                             (tcp_server.handle_request
2868
 
                              (*args[2:], **kwargs) or True))
2869
 
        
2870
 
        logger.debug("Starting main loop")
2871
640
        main_loop.run()
2872
 
    except AvahiError as error:
2873
 
        logger.critical("Avahi Error", exc_info=error)
2874
 
        cleanup()
2875
 
        sys.exit(1)
2876
641
    except KeyboardInterrupt:
2877
 
        if debug:
2878
 
            print("", file=sys.stderr)
2879
 
        logger.debug("Server received KeyboardInterrupt")
2880
 
    logger.debug("Server exiting")
2881
 
    # Must run before the D-Bus bus name gets deregistered
2882
 
    cleanup()
 
642
        print
 
643
    
 
644
    # Cleanup here
2883
645
 
2884
 
if __name__ == '__main__':
2885
 
    main()
 
646
    # From the Avahi server example code
 
647
    if not group is None:
 
648
        group.Free()
 
649
    # End of Avahi example code
 
650
    
 
651
    for client in clients:
 
652
        client.stop_hook = None
 
653
        client.stop()