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  • Committer: Teddy Hogeborn
  • Date: 2008-01-30 17:28:18 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080130172818-fnrq2xmtg1wa8wo2
* client.cpp (main): Get t_old early since it is used on error exits.

* server.py (Client.checker): New attribute.
  (Client.check_action, Client.start_checker, Client.stop_checker,
  Client.fileno, Client.next_stop, Client.still_valid,
  Client.it_is_time_to_check): New methods.
  (Client.handle_request): Alias to "check_action".
  (main): Stop all started checkers on exit.  Exit cleanly on keyboard
  interrupt.

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#!/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 © 2008-2013 Teddy Hogeborn
15
 
# Copyright © 2008-2013 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
import SocketServer
40
4
import socket
41
 
import argparse
 
5
import select
 
6
from optparse import OptionParser
42
7
import datetime
43
8
import errno
44
9
import gnutls.crypto
45
10
import gnutls.connection
46
11
import gnutls.errors
47
 
import gnutls.library.functions
48
 
import gnutls.library.constants
49
 
import gnutls.library.types
50
 
import ConfigParser as configparser
 
12
import ConfigParser
51
13
import sys
52
14
import re
53
15
import os
54
16
import signal
55
 
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
 
 
73
 
import dbus
74
 
import dbus.service
75
 
import gobject
76
 
import avahi
77
 
from dbus.mainloop.glib import DBusGMainLoop
78
 
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 = "1.6.1"
92
 
stored_state_file = "clients.pickle"
93
 
 
94
 
logger = logging.getLogger()
95
 
syslogger = (logging.handlers.SysLogHandler
96
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
 
              address = str("/dev/log")))
98
 
 
99
 
try:
100
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
101
 
                      (ctypes.util.find_library("c"))
102
 
                      .if_nametoindex)
103
 
except (OSError, AttributeError):
104
 
    def if_nametoindex(interface):
105
 
        "Get an interface index the hard way, i.e. using fcntl()"
106
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
107
 
        with contextlib.closing(socket.socket()) as s:
108
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
 
                                struct.pack(str("16s16x"),
110
 
                                            interface))
111
 
        interface_index = struct.unpack(str("I"),
112
 
                                        ifreq[16:20])[0]
113
 
        return interface_index
114
 
 
115
 
 
116
 
def initlogger(debug, level=logging.WARNING):
117
 
    """init logger and add loglevel"""
118
 
    
119
 
    syslogger.setFormatter(logging.Formatter
120
 
                           ('Mandos [%(process)d]: %(levelname)s:'
121
 
                            ' %(message)s'))
122
 
    logger.addHandler(syslogger)
123
 
    
124
 
    if debug:
125
 
        console = logging.StreamHandler()
126
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
 
                                               ' [%(process)d]:'
128
 
                                               ' %(levelname)s:'
129
 
                                               ' %(message)s'))
130
 
        logger.addHandler(console)
131
 
    logger.setLevel(level)
132
 
 
133
 
 
134
 
class PGPError(Exception):
135
 
    """Exception if encryption/decryption fails"""
136
 
    pass
137
 
 
138
 
 
139
 
class PGPEngine(object):
140
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
141
 
    def __init__(self):
142
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
143
 
        self.gnupgargs = ['--batch',
144
 
                          '--home', self.tempdir,
145
 
                          '--force-mdc',
146
 
                          '--quiet',
147
 
                          '--no-use-agent']
148
 
    
149
 
    def __enter__(self):
150
 
        return self
151
 
    
152
 
    def __exit__(self, exc_type, exc_value, traceback):
153
 
        self._cleanup()
154
 
        return False
155
 
    
156
 
    def __del__(self):
157
 
        self._cleanup()
158
 
    
159
 
    def _cleanup(self):
160
 
        if self.tempdir is not None:
161
 
            # Delete contents of tempdir
162
 
            for root, dirs, files in os.walk(self.tempdir,
163
 
                                             topdown = False):
164
 
                for filename in files:
165
 
                    os.remove(os.path.join(root, filename))
166
 
                for dirname in dirs:
167
 
                    os.rmdir(os.path.join(root, dirname))
168
 
            # Remove tempdir
169
 
            os.rmdir(self.tempdir)
170
 
            self.tempdir = None
171
 
    
172
 
    def password_encode(self, password):
173
 
        # Passphrase can not be empty and can not contain newlines or
174
 
        # NUL bytes.  So we prefix it and hex encode it.
175
 
        return b"mandos" + binascii.hexlify(password)
176
 
    
177
 
    def encrypt(self, data, password):
178
 
        passphrase = self.password_encode(password)
179
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
180
 
                                         ) as passfile:
181
 
            passfile.write(passphrase)
182
 
            passfile.flush()
183
 
            proc = subprocess.Popen(['gpg', '--symmetric',
184
 
                                     '--passphrase-file',
185
 
                                     passfile.name]
186
 
                                    + self.gnupgargs,
187
 
                                    stdin = subprocess.PIPE,
188
 
                                    stdout = subprocess.PIPE,
189
 
                                    stderr = subprocess.PIPE)
190
 
            ciphertext, err = proc.communicate(input = data)
191
 
        if proc.returncode != 0:
192
 
            raise PGPError(err)
193
 
        return ciphertext
194
 
    
195
 
    def decrypt(self, data, password):
196
 
        passphrase = self.password_encode(password)
197
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
198
 
                                         ) as passfile:
199
 
            passfile.write(passphrase)
200
 
            passfile.flush()
201
 
            proc = subprocess.Popen(['gpg', '--decrypt',
202
 
                                     '--passphrase-file',
203
 
                                     passfile.name]
204
 
                                    + self.gnupgargs,
205
 
                                    stdin = subprocess.PIPE,
206
 
                                    stdout = subprocess.PIPE,
207
 
                                    stderr = subprocess.PIPE)
208
 
            decrypted_plaintext, err = proc.communicate(input
209
 
                                                        = data)
210
 
        if proc.returncode != 0:
211
 
            raise PGPError(err)
212
 
        return decrypted_plaintext
213
 
 
214
 
 
215
 
class AvahiError(Exception):
216
 
    def __init__(self, value, *args, **kwargs):
217
 
        self.value = value
218
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
219
 
    def __unicode__(self):
220
 
        return unicode(repr(self.value))
221
 
 
222
 
class AvahiServiceError(AvahiError):
223
 
    pass
224
 
 
225
 
class AvahiGroupError(AvahiError):
226
 
    pass
227
 
 
228
 
 
229
 
class AvahiService(object):
230
 
    """An Avahi (Zeroconf) service.
231
 
    
232
 
    Attributes:
233
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
234
 
               Used to optionally bind to the specified interface.
235
 
    name: string; Example: 'Mandos'
236
 
    type: string; Example: '_mandos._tcp'.
237
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
238
 
    port: integer; what port to announce
239
 
    TXT: list of strings; TXT record for the service
240
 
    domain: string; Domain to publish on, default to .local if empty.
241
 
    host: string; Host to publish records for, default is localhost
242
 
    max_renames: integer; maximum number of renames
243
 
    rename_count: integer; counter so we only rename after collisions
244
 
                  a sensible number of times
245
 
    group: D-Bus Entry Group
246
 
    server: D-Bus Server
247
 
    bus: dbus.SystemBus()
248
 
    """
249
 
    
250
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
251
 
                 servicetype = None, port = None, TXT = None,
252
 
                 domain = "", host = "", max_renames = 32768,
253
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
254
 
        self.interface = interface
255
 
        self.name = name
256
 
        self.type = servicetype
257
 
        self.port = port
258
 
        self.TXT = TXT if TXT is not None else []
259
 
        self.domain = domain
260
 
        self.host = host
261
 
        self.rename_count = 0
262
 
        self.max_renames = max_renames
263
 
        self.protocol = protocol
264
 
        self.group = None       # our entry group
265
 
        self.server = None
266
 
        self.bus = bus
267
 
        self.entry_group_state_changed_match = None
268
 
    
269
 
    def rename(self):
270
 
        """Derived from the Avahi example code"""
271
 
        if self.rename_count >= self.max_renames:
272
 
            logger.critical("No suitable Zeroconf service name found"
273
 
                            " after %i retries, exiting.",
274
 
                            self.rename_count)
275
 
            raise AvahiServiceError("Too many renames")
276
 
        self.name = unicode(self.server
277
 
                            .GetAlternativeServiceName(self.name))
278
 
        logger.info("Changing Zeroconf service name to %r ...",
279
 
                    self.name)
280
 
        self.remove()
281
 
        try:
282
 
            self.add()
283
 
        except dbus.exceptions.DBusException as error:
284
 
            logger.critical("D-Bus Exception", exc_info=error)
285
 
            self.cleanup()
286
 
            os._exit(1)
287
 
        self.rename_count += 1
288
 
    
289
 
    def remove(self):
290
 
        """Derived from the Avahi example code"""
291
 
        if self.entry_group_state_changed_match is not None:
292
 
            self.entry_group_state_changed_match.remove()
293
 
            self.entry_group_state_changed_match = None
294
 
        if self.group is not None:
295
 
            self.group.Reset()
296
 
    
297
 
    def add(self):
298
 
        """Derived from the Avahi example code"""
299
 
        self.remove()
300
 
        if self.group is None:
301
 
            self.group = dbus.Interface(
302
 
                self.bus.get_object(avahi.DBUS_NAME,
303
 
                                    self.server.EntryGroupNew()),
304
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
305
 
        self.entry_group_state_changed_match = (
306
 
            self.group.connect_to_signal(
307
 
                'StateChanged', self.entry_group_state_changed))
308
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
309
 
                     self.name, self.type)
310
 
        self.group.AddService(
311
 
            self.interface,
312
 
            self.protocol,
313
 
            dbus.UInt32(0),     # flags
314
 
            self.name, self.type,
315
 
            self.domain, self.host,
316
 
            dbus.UInt16(self.port),
317
 
            avahi.string_array_to_txt_array(self.TXT))
318
 
        self.group.Commit()
319
 
    
320
 
    def entry_group_state_changed(self, state, error):
321
 
        """Derived from the Avahi example code"""
322
 
        logger.debug("Avahi entry group state change: %i", state)
323
 
        
324
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
325
 
            logger.debug("Zeroconf service established.")
326
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
327
 
            logger.info("Zeroconf service name collision.")
328
 
            self.rename()
329
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
330
 
            logger.critical("Avahi: Error in group state changed %s",
331
 
                            unicode(error))
332
 
            raise AvahiGroupError("State changed: {0!s}"
333
 
                                  .format(error))
334
 
    
335
 
    def cleanup(self):
336
 
        """Derived from the Avahi example code"""
337
 
        if self.group is not None:
338
 
            try:
339
 
                self.group.Free()
340
 
            except (dbus.exceptions.UnknownMethodException,
341
 
                    dbus.exceptions.DBusException):
342
 
                pass
343
 
            self.group = None
344
 
        self.remove()
345
 
    
346
 
    def server_state_changed(self, state, error=None):
347
 
        """Derived from the Avahi example code"""
348
 
        logger.debug("Avahi server state change: %i", state)
349
 
        bad_states = { avahi.SERVER_INVALID:
350
 
                           "Zeroconf server invalid",
351
 
                       avahi.SERVER_REGISTERING: None,
352
 
                       avahi.SERVER_COLLISION:
353
 
                           "Zeroconf server name collision",
354
 
                       avahi.SERVER_FAILURE:
355
 
                           "Zeroconf server failure" }
356
 
        if state in bad_states:
357
 
            if bad_states[state] is not None:
358
 
                if error is None:
359
 
                    logger.error(bad_states[state])
360
 
                else:
361
 
                    logger.error(bad_states[state] + ": %r", error)
362
 
            self.cleanup()
363
 
        elif state == avahi.SERVER_RUNNING:
364
 
            self.add()
365
 
        else:
366
 
            if error is None:
367
 
                logger.debug("Unknown state: %r", state)
368
 
            else:
369
 
                logger.debug("Unknown state: %r: %r", state, error)
370
 
    
371
 
    def activate(self):
372
 
        """Derived from the Avahi example code"""
373
 
        if self.server is None:
374
 
            self.server = dbus.Interface(
375
 
                self.bus.get_object(avahi.DBUS_NAME,
376
 
                                    avahi.DBUS_PATH_SERVER,
377
 
                                    follow_name_owner_changes=True),
378
 
                avahi.DBUS_INTERFACE_SERVER)
379
 
        self.server.connect_to_signal("StateChanged",
380
 
                                 self.server_state_changed)
381
 
        self.server_state_changed(self.server.GetState())
382
 
 
383
 
 
384
 
class AvahiServiceToSyslog(AvahiService):
385
 
    def rename(self):
386
 
        """Add the new name to the syslog messages"""
387
 
        ret = AvahiService.rename(self)
388
 
        syslogger.setFormatter(logging.Formatter
389
 
                               ('Mandos ({0}) [%(process)d]:'
390
 
                                ' %(levelname)s: %(message)s'
391
 
                                .format(self.name)))
392
 
        return ret
393
 
 
394
 
 
395
 
def timedelta_to_milliseconds(td):
396
 
    "Convert a datetime.timedelta() to milliseconds"
397
 
    return ((td.days * 24 * 60 * 60 * 1000)
398
 
            + (td.seconds * 1000)
399
 
            + (td.microseconds // 1000))
400
 
 
401
17
 
402
18
class Client(object):
403
 
    """A representation of a client host served by this server.
404
 
    
405
 
    Attributes:
406
 
    approved:   bool(); 'None' if not yet approved/disapproved
407
 
    approval_delay: datetime.timedelta(); Time to wait for approval
408
 
    approval_duration: datetime.timedelta(); Duration of one approval
409
 
    checker:    subprocess.Popen(); a running checker process used
410
 
                                    to see if the client lives.
411
 
                                    'None' if no process is running.
412
 
    checker_callback_tag: a gobject event source tag, or None
413
 
    checker_command: string; External command which is run to check
414
 
                     if client lives.  %() expansions are done at
415
 
                     runtime with vars(self) as dict, so that for
416
 
                     instance %(name)s can be used in the command.
417
 
    checker_initiator_tag: a gobject event source tag, or None
418
 
    created:    datetime.datetime(); (UTC) object creation
419
 
    client_structure: Object describing what attributes a client has
420
 
                      and is used for storing the client at exit
421
 
    current_checker_command: string; current running checker_command
422
 
    disable_initiator_tag: a gobject event source tag, or None
423
 
    enabled:    bool()
424
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
425
 
                 uniquely identify the client
426
 
    host:       string; available for use by the checker command
427
 
    interval:   datetime.timedelta(); How often to start a new checker
428
 
    last_approval_request: datetime.datetime(); (UTC) or None
429
 
    last_checked_ok: datetime.datetime(); (UTC) or None
430
 
    last_checker_status: integer between 0 and 255 reflecting exit
431
 
                         status of last checker. -1 reflects crashed
432
 
                         checker, -2 means no checker completed yet.
433
 
    last_enabled: datetime.datetime(); (UTC) or None
434
 
    name:       string; from the config file, used in log messages and
435
 
                        D-Bus identifiers
436
 
    secret:     bytestring; sent verbatim (over TLS) to client
437
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
438
 
                                      until this client is disabled
439
 
    extended_timeout:   extra long timeout when secret has been sent
440
 
    runtime_expansions: Allowed attributes for runtime expansion.
441
 
    expires:    datetime.datetime(); time (UTC) when a client will be
442
 
                disabled, or None
443
 
    server_settings: The server_settings dict from main()
444
 
    """
445
 
    
446
 
    runtime_expansions = ("approval_delay", "approval_duration",
447
 
                          "created", "enabled", "expires",
448
 
                          "fingerprint", "host", "interval",
449
 
                          "last_approval_request", "last_checked_ok",
450
 
                          "last_enabled", "name", "timeout")
451
 
    client_defaults = { "timeout": "PT5M",
452
 
                        "extended_timeout": "PT15M",
453
 
                        "interval": "PT2M",
454
 
                        "checker": "fping -q -- %%(host)s",
455
 
                        "host": "",
456
 
                        "approval_delay": "PT0S",
457
 
                        "approval_duration": "PT1S",
458
 
                        "approved_by_default": "True",
459
 
                        "enabled": "True",
460
 
                        }
461
 
    
462
 
    def timeout_milliseconds(self):
463
 
        "Return the 'timeout' attribute in milliseconds"
464
 
        return timedelta_to_milliseconds(self.timeout)
465
 
    
466
 
    def extended_timeout_milliseconds(self):
467
 
        "Return the 'extended_timeout' attribute in milliseconds"
468
 
        return timedelta_to_milliseconds(self.extended_timeout)
469
 
    
470
 
    def interval_milliseconds(self):
471
 
        "Return the 'interval' attribute in milliseconds"
472
 
        return timedelta_to_milliseconds(self.interval)
473
 
    
474
 
    def approval_delay_milliseconds(self):
475
 
        return timedelta_to_milliseconds(self.approval_delay)
476
 
    
477
 
    @staticmethod
478
 
    def config_parser(config):
479
 
        """Construct a new dict of client settings of this form:
480
 
        { client_name: {setting_name: value, ...}, ...}
481
 
        with exceptions for any special settings as defined above.
482
 
        NOTE: Must be a pure function. Must return the same result
483
 
        value given the same arguments.
484
 
        """
485
 
        settings = {}
486
 
        for client_name in config.sections():
487
 
            section = dict(config.items(client_name))
488
 
            client = settings[client_name] = {}
489
 
            
490
 
            client["host"] = section["host"]
491
 
            # Reformat values from string types to Python types
492
 
            client["approved_by_default"] = config.getboolean(
493
 
                client_name, "approved_by_default")
494
 
            client["enabled"] = config.getboolean(client_name,
495
 
                                                  "enabled")
496
 
            
497
 
            client["fingerprint"] = (section["fingerprint"].upper()
498
 
                                     .replace(" ", ""))
499
 
            if "secret" in section:
500
 
                client["secret"] = section["secret"].decode("base64")
501
 
            elif "secfile" in section:
502
 
                with open(os.path.expanduser(os.path.expandvars
503
 
                                             (section["secfile"])),
504
 
                          "rb") as secfile:
505
 
                    client["secret"] = secfile.read()
506
 
            else:
507
 
                raise TypeError("No secret or secfile for section {0}"
508
 
                                .format(section))
509
 
            client["timeout"] = string_to_delta(section["timeout"])
510
 
            client["extended_timeout"] = string_to_delta(
511
 
                section["extended_timeout"])
512
 
            client["interval"] = string_to_delta(section["interval"])
513
 
            client["approval_delay"] = string_to_delta(
514
 
                section["approval_delay"])
515
 
            client["approval_duration"] = string_to_delta(
516
 
                section["approval_duration"])
517
 
            client["checker_command"] = section["checker"]
518
 
            client["last_approval_request"] = None
519
 
            client["last_checked_ok"] = None
520
 
            client["last_checker_status"] = -2
521
 
        
522
 
        return settings
523
 
    
524
 
    def __init__(self, settings, name = None, server_settings=None):
 
19
    def __init__(self, name=None, options=None, dn=None,
 
20
                 password=None, passfile=None, fqdn=None,
 
21
                 timeout=None, interval=-1):
525
22
        self.name = name
526
 
        if server_settings is None:
527
 
            server_settings = {}
528
 
        self.server_settings = server_settings
529
 
        # adding all client settings
530
 
        for setting, value in settings.iteritems():
531
 
            setattr(self, setting, value)
532
 
        
533
 
        if self.enabled:
534
 
            if not hasattr(self, "last_enabled"):
535
 
                self.last_enabled = datetime.datetime.utcnow()
536
 
            if not hasattr(self, "expires"):
537
 
                self.expires = (datetime.datetime.utcnow()
538
 
                                + self.timeout)
539
 
        else:
540
 
            self.last_enabled = None
541
 
            self.expires = None
542
 
        
543
 
        logger.debug("Creating client %r", self.name)
544
 
        # Uppercase and remove spaces from fingerprint for later
545
 
        # comparison purposes with return value from the fingerprint()
546
 
        # function
547
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
548
 
        self.created = settings.get("created",
549
 
                                    datetime.datetime.utcnow())
550
 
        
551
 
        # attributes specific for this server instance
552
 
        self.checker = None
553
 
        self.checker_initiator_tag = None
554
 
        self.disable_initiator_tag = None
555
 
        self.checker_callback_tag = None
556
 
        self.current_checker_command = None
557
 
        self.approved = None
558
 
        self.approvals_pending = 0
559
 
        self.changedstate = (multiprocessing_manager
560
 
                             .Condition(multiprocessing_manager
561
 
                                        .Lock()))
562
 
        self.client_structure = [attr for attr in
563
 
                                 self.__dict__.iterkeys()
564
 
                                 if not attr.startswith("_")]
565
 
        self.client_structure.append("client_structure")
566
 
        
567
 
        for name, t in inspect.getmembers(type(self),
568
 
                                          lambda obj:
569
 
                                              isinstance(obj,
570
 
                                                         property)):
571
 
            if not name.startswith("_"):
572
 
                self.client_structure.append(name)
573
 
    
574
 
    # Send notice to process children that client state has changed
575
 
    def send_changedstate(self):
576
 
        with self.changedstate:
577
 
            self.changedstate.notify_all()
578
 
    
579
 
    def enable(self):
580
 
        """Start this client's checker and timeout hooks"""
581
 
        if getattr(self, "enabled", False):
582
 
            # Already enabled
583
 
            return
584
 
        self.expires = datetime.datetime.utcnow() + self.timeout
585
 
        self.enabled = True
586
 
        self.last_enabled = datetime.datetime.utcnow()
587
 
        self.init_checker()
588
 
        self.send_changedstate()
589
 
    
590
 
    def disable(self, quiet=True):
591
 
        """Disable this client."""
592
 
        if not getattr(self, "enabled", False):
593
 
            return False
594
 
        if not quiet:
595
 
            logger.info("Disabling client %s", self.name)
596
 
        if getattr(self, "disable_initiator_tag", None) is not None:
597
 
            gobject.source_remove(self.disable_initiator_tag)
598
 
            self.disable_initiator_tag = None
599
 
        self.expires = None
600
 
        if getattr(self, "checker_initiator_tag", None) is not None:
601
 
            gobject.source_remove(self.checker_initiator_tag)
602
 
            self.checker_initiator_tag = None
603
 
        self.stop_checker()
604
 
        self.enabled = False
605
 
        if not quiet:
606
 
            self.send_changedstate()
607
 
        # Do not run this again if called by a gobject.timeout_add
608
 
        return False
609
 
    
610
 
    def __del__(self):
611
 
        self.disable()
612
 
    
613
 
    def init_checker(self):
614
 
        # Schedule a new checker to be started an 'interval' from now,
615
 
        # and every interval from then on.
616
 
        if self.checker_initiator_tag is not None:
617
 
            gobject.source_remove(self.checker_initiator_tag)
618
 
        self.checker_initiator_tag = (gobject.timeout_add
619
 
                                      (self.interval_milliseconds(),
620
 
                                       self.start_checker))
621
 
        # Schedule a disable() when 'timeout' has passed
622
 
        if self.disable_initiator_tag is not None:
623
 
            gobject.source_remove(self.disable_initiator_tag)
624
 
        self.disable_initiator_tag = (gobject.timeout_add
625
 
                                   (self.timeout_milliseconds(),
626
 
                                    self.disable))
627
 
        # Also start a new checker *right now*.
628
 
        self.start_checker()
629
 
    
630
 
    def checker_callback(self, pid, condition, command):
631
 
        """The checker has completed, so take appropriate actions."""
632
 
        self.checker_callback_tag = None
633
 
        self.checker = None
634
 
        if os.WIFEXITED(condition):
635
 
            self.last_checker_status = os.WEXITSTATUS(condition)
636
 
            if self.last_checker_status == 0:
637
 
                logger.info("Checker for %(name)s succeeded",
638
 
                            vars(self))
639
 
                self.checked_ok()
640
 
            else:
641
 
                logger.info("Checker for %(name)s failed",
642
 
                            vars(self))
643
 
        else:
644
 
            self.last_checker_status = -1
645
 
            logger.warning("Checker for %(name)s crashed?",
646
 
                           vars(self))
647
 
    
648
 
    def checked_ok(self):
649
 
        """Assert that the client has been seen, alive and well."""
650
 
        self.last_checked_ok = datetime.datetime.utcnow()
651
 
        self.last_checker_status = 0
652
 
        self.bump_timeout()
653
 
    
654
 
    def bump_timeout(self, timeout=None):
655
 
        """Bump up the timeout for this client."""
 
23
        self.dn = dn
 
24
        if password:
 
25
            self.password = password
 
26
        elif passfile:
 
27
            self.password = open(passfile).readall()
 
28
        else:
 
29
            print "No Password or Passfile in client config file"
 
30
            # raise RuntimeError XXX
 
31
            self.password = "gazonk"
 
32
        self.fqdn = fqdn                # string
 
33
        self.created = datetime.datetime.now()
 
34
        self.last_seen = None           # datetime.datetime()
656
35
        if timeout is None:
657
 
            timeout = self.timeout
658
 
        if self.disable_initiator_tag is not None:
659
 
            gobject.source_remove(self.disable_initiator_tag)
660
 
            self.disable_initiator_tag = None
661
 
        if getattr(self, "enabled", False):
662
 
            self.disable_initiator_tag = (gobject.timeout_add
663
 
                                          (timedelta_to_milliseconds
664
 
                                           (timeout), self.disable))
665
 
            self.expires = datetime.datetime.utcnow() + timeout
666
 
    
667
 
    def need_approval(self):
668
 
        self.last_approval_request = datetime.datetime.utcnow()
669
 
    
 
36
            timeout = options.timeout
 
37
        self.timeout = timeout          # datetime.timedelta()
 
38
        if interval == -1:
 
39
            interval = options.interval
 
40
        self.interval = interval        # datetime.timedelta()
 
41
        self.next_check = datetime.datetime.now() # datetime.datetime()
 
42
        self.checker = None             # or a subprocess.Popen()
 
43
    def check_action(self, now=None):
 
44
        """The checker said something and might have completed.
 
45
        Check if is has, and take appropriate actions."""
 
46
        if self.checker.poll() is None:
 
47
            # False alarm, no result yet
 
48
            #self.checker.read()
 
49
            return
 
50
        if now is None:
 
51
            now = datetime.datetime.now()
 
52
        if self.checker.returncode == 0:
 
53
            self.last_seen = now
 
54
        while self.next_check <= now:
 
55
            self.next_check += self.interval
 
56
    handle_request = check_action
670
57
    def start_checker(self):
671
 
        """Start a new checker subprocess if one is not running.
672
 
        
673
 
        If a checker already exists, leave it running and do
674
 
        nothing."""
675
 
        # The reason for not killing a running checker is that if we
676
 
        # did that, and if a checker (for some reason) started running
677
 
        # slowly and taking more than 'interval' time, then the client
678
 
        # would inevitably timeout, since no checker would get a
679
 
        # chance to run to completion.  If we instead leave running
680
 
        # checkers alone, the checker would have to take more time
681
 
        # than 'timeout' for the client to be disabled, which is as it
682
 
        # should be.
683
 
        
684
 
        # If a checker exists, make sure it is not a zombie
 
58
        self.stop_checker()
685
59
        try:
686
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
687
 
        except (AttributeError, OSError) as error:
688
 
            if (isinstance(error, OSError)
689
 
                and error.errno != errno.ECHILD):
690
 
                raise error
691
 
        else:
692
 
            if pid:
693
 
                logger.warning("Checker was a zombie")
694
 
                gobject.source_remove(self.checker_callback_tag)
695
 
                self.checker_callback(pid, status,
696
 
                                      self.current_checker_command)
697
 
        # Start a new checker if needed
698
 
        if self.checker is None:
699
 
            # Escape attributes for the shell
700
 
            escaped_attrs = dict(
701
 
                (attr, re.escape(unicode(getattr(self, attr))))
702
 
                for attr in
703
 
                self.runtime_expansions)
704
 
            try:
705
 
                command = self.checker_command % escaped_attrs
706
 
            except TypeError as error:
707
 
                logger.error('Could not format string "%s"',
708
 
                             self.checker_command, exc_info=error)
709
 
                return True # Try again later
710
 
            self.current_checker_command = command
711
 
            try:
712
 
                logger.info("Starting checker %r for %s",
713
 
                            command, self.name)
714
 
                # We don't need to redirect stdout and stderr, since
715
 
                # in normal mode, that is already done by daemon(),
716
 
                # and in debug mode we don't want to.  (Stdin is
717
 
                # always replaced by /dev/null.)
718
 
                # The exception is when not debugging but nevertheless
719
 
                # running in the foreground; use the previously
720
 
                # created wnull.
721
 
                popen_args = {}
722
 
                if (not self.server_settings["debug"]
723
 
                    and self.server_settings["foreground"]):
724
 
                    popen_args.update({"stdout": wnull,
725
 
                                       "stderr": wnull })
726
 
                self.checker = subprocess.Popen(command,
727
 
                                                close_fds=True,
728
 
                                                shell=True, cwd="/",
729
 
                                                **popen_args)
730
 
            except OSError as error:
731
 
                logger.error("Failed to start subprocess",
732
 
                             exc_info=error)
733
 
                return True
734
 
            self.checker_callback_tag = (gobject.child_watch_add
735
 
                                         (self.checker.pid,
736
 
                                          self.checker_callback,
737
 
                                          data=command))
738
 
            # The checker may have completed before the gobject
739
 
            # watch was added.  Check for this.
740
 
            try:
741
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
742
 
            except OSError as error:
743
 
                if error.errno == errno.ECHILD:
744
 
                    # This should never happen
745
 
                    logger.error("Child process vanished",
746
 
                                 exc_info=error)
747
 
                    return True
748
 
                raise
749
 
            if pid:
750
 
                gobject.source_remove(self.checker_callback_tag)
751
 
                self.checker_callback(pid, status, command)
752
 
        # Re-run this periodically if run by gobject.timeout_add
753
 
        return True
754
 
    
 
60
            self.checker = subprocess.Popen("sleep 1; fping -q -- %s"
 
61
                                            % re.escape(self.fqdn),
 
62
                                            stdout=subprocess.PIPE,
 
63
                                            close_fds=True,
 
64
                                            shell=True, cwd="/")
 
65
        except subprocess.OSError, e:
 
66
            print "Failed to start subprocess:", e
755
67
    def stop_checker(self):
756
 
        """Force the checker process, if any, to stop."""
757
 
        if self.checker_callback_tag:
758
 
            gobject.source_remove(self.checker_callback_tag)
759
 
            self.checker_callback_tag = None
760
 
        if getattr(self, "checker", None) is None:
761
 
            return
762
 
        logger.debug("Stopping checker for %(name)s", vars(self))
763
 
        try:
764
 
            self.checker.terminate()
765
 
            #time.sleep(0.5)
766
 
            #if self.checker.poll() is None:
767
 
            #    self.checker.kill()
768
 
        except OSError as error:
769
 
            if error.errno != errno.ESRCH: # No such process
770
 
                raise
771
 
        self.checker = None
772
 
 
773
 
 
774
 
def dbus_service_property(dbus_interface, signature="v",
775
 
                          access="readwrite", byte_arrays=False):
776
 
    """Decorators for marking methods of a DBusObjectWithProperties to
777
 
    become properties on the D-Bus.
778
 
    
779
 
    The decorated method will be called with no arguments by "Get"
780
 
    and with one argument by "Set".
781
 
    
782
 
    The parameters, where they are supported, are the same as
783
 
    dbus.service.method, except there is only "signature", since the
784
 
    type from Get() and the type sent to Set() is the same.
785
 
    """
786
 
    # Encoding deeply encoded byte arrays is not supported yet by the
787
 
    # "Set" method, so we fail early here:
788
 
    if byte_arrays and signature != "ay":
789
 
        raise ValueError("Byte arrays not supported for non-'ay'"
790
 
                         " signature {0!r}".format(signature))
791
 
    def decorator(func):
792
 
        func._dbus_is_property = True
793
 
        func._dbus_interface = dbus_interface
794
 
        func._dbus_signature = signature
795
 
        func._dbus_access = access
796
 
        func._dbus_name = func.__name__
797
 
        if func._dbus_name.endswith("_dbus_property"):
798
 
            func._dbus_name = func._dbus_name[:-14]
799
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
800
 
        return func
801
 
    return decorator
802
 
 
803
 
 
804
 
def dbus_interface_annotations(dbus_interface):
805
 
    """Decorator for marking functions returning interface annotations
806
 
    
807
 
    Usage:
808
 
    
809
 
    @dbus_interface_annotations("org.example.Interface")
810
 
    def _foo(self):  # Function name does not matter
811
 
        return {"org.freedesktop.DBus.Deprecated": "true",
812
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
813
 
                    "false"}
814
 
    """
815
 
    def decorator(func):
816
 
        func._dbus_is_interface = True
817
 
        func._dbus_interface = dbus_interface
818
 
        func._dbus_name = dbus_interface
819
 
        return func
820
 
    return decorator
821
 
 
822
 
 
823
 
def dbus_annotations(annotations):
824
 
    """Decorator to annotate D-Bus methods, signals or properties
825
 
    Usage:
826
 
    
827
 
    @dbus_service_property("org.example.Interface", signature="b",
828
 
                           access="r")
829
 
    @dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
830
 
                        "org.freedesktop.DBus.Property."
831
 
                        "EmitsChangedSignal": "false"})
832
 
    def Property_dbus_property(self):
833
 
        return dbus.Boolean(False)
834
 
    """
835
 
    def decorator(func):
836
 
        func._dbus_annotations = annotations
837
 
        return func
838
 
    return decorator
839
 
 
840
 
 
841
 
class DBusPropertyException(dbus.exceptions.DBusException):
842
 
    """A base class for D-Bus property-related exceptions
843
 
    """
844
 
    def __unicode__(self):
845
 
        return unicode(str(self))
846
 
 
847
 
 
848
 
class DBusPropertyAccessException(DBusPropertyException):
849
 
    """A property's access permissions disallows an operation.
850
 
    """
851
 
    pass
852
 
 
853
 
 
854
 
class DBusPropertyNotFound(DBusPropertyException):
855
 
    """An attempt was made to access a non-existing property.
856
 
    """
857
 
    pass
858
 
 
859
 
 
860
 
class DBusObjectWithProperties(dbus.service.Object):
861
 
    """A D-Bus object with properties.
862
 
    
863
 
    Classes inheriting from this can use the dbus_service_property
864
 
    decorator to expose methods as D-Bus properties.  It exposes the
865
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
866
 
    """
867
 
    
868
 
    @staticmethod
869
 
    def _is_dbus_thing(thing):
870
 
        """Returns a function testing if an attribute is a D-Bus thing
871
 
        
872
 
        If called like _is_dbus_thing("method") it returns a function
873
 
        suitable for use as predicate to inspect.getmembers().
874
 
        """
875
 
        return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
876
 
                                   False)
877
 
    
878
 
    def _get_all_dbus_things(self, thing):
879
 
        """Returns a generator of (name, attribute) pairs
880
 
        """
881
 
        return ((getattr(athing.__get__(self), "_dbus_name",
882
 
                         name),
883
 
                 athing.__get__(self))
884
 
                for cls in self.__class__.__mro__
885
 
                for name, athing in
886
 
                inspect.getmembers(cls,
887
 
                                   self._is_dbus_thing(thing)))
888
 
    
889
 
    def _get_dbus_property(self, interface_name, property_name):
890
 
        """Returns a bound method if one exists which is a D-Bus
891
 
        property with the specified name and interface.
892
 
        """
893
 
        for cls in  self.__class__.__mro__:
894
 
            for name, value in (inspect.getmembers
895
 
                                (cls,
896
 
                                 self._is_dbus_thing("property"))):
897
 
                if (value._dbus_name == property_name
898
 
                    and value._dbus_interface == interface_name):
899
 
                    return value.__get__(self)
900
 
        
901
 
        # No such property
902
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
903
 
                                   + interface_name + "."
904
 
                                   + property_name)
905
 
    
906
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
907
 
                         out_signature="v")
908
 
    def Get(self, interface_name, property_name):
909
 
        """Standard D-Bus property Get() method, see D-Bus standard.
910
 
        """
911
 
        prop = self._get_dbus_property(interface_name, property_name)
912
 
        if prop._dbus_access == "write":
913
 
            raise DBusPropertyAccessException(property_name)
914
 
        value = prop()
915
 
        if not hasattr(value, "variant_level"):
916
 
            return value
917
 
        return type(value)(value, variant_level=value.variant_level+1)
918
 
    
919
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
920
 
    def Set(self, interface_name, property_name, value):
921
 
        """Standard D-Bus property Set() method, see D-Bus standard.
922
 
        """
923
 
        prop = self._get_dbus_property(interface_name, property_name)
924
 
        if prop._dbus_access == "read":
925
 
            raise DBusPropertyAccessException(property_name)
926
 
        if prop._dbus_get_args_options["byte_arrays"]:
927
 
            # The byte_arrays option is not supported yet on
928
 
            # signatures other than "ay".
929
 
            if prop._dbus_signature != "ay":
930
 
                raise ValueError
931
 
            value = dbus.ByteArray(b''.join(chr(byte)
932
 
                                            for byte in value))
933
 
        prop(value)
934
 
    
935
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
936
 
                         out_signature="a{sv}")
937
 
    def GetAll(self, interface_name):
938
 
        """Standard D-Bus property GetAll() method, see D-Bus
939
 
        standard.
940
 
        
941
 
        Note: Will not include properties with access="write".
942
 
        """
943
 
        properties = {}
944
 
        for name, prop in self._get_all_dbus_things("property"):
945
 
            if (interface_name
946
 
                and interface_name != prop._dbus_interface):
947
 
                # Interface non-empty but did not match
948
 
                continue
949
 
            # Ignore write-only properties
950
 
            if prop._dbus_access == "write":
951
 
                continue
952
 
            value = prop()
953
 
            if not hasattr(value, "variant_level"):
954
 
                properties[name] = value
955
 
                continue
956
 
            properties[name] = type(value)(value, variant_level=
957
 
                                           value.variant_level+1)
958
 
        return dbus.Dictionary(properties, signature="sv")
959
 
    
960
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
961
 
                         out_signature="s",
962
 
                         path_keyword='object_path',
963
 
                         connection_keyword='connection')
964
 
    def Introspect(self, object_path, connection):
965
 
        """Overloading of standard D-Bus method.
966
 
        
967
 
        Inserts property tags and interface annotation tags.
968
 
        """
969
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
970
 
                                                   connection)
971
 
        try:
972
 
            document = xml.dom.minidom.parseString(xmlstring)
973
 
            def make_tag(document, name, prop):
974
 
                e = document.createElement("property")
975
 
                e.setAttribute("name", name)
976
 
                e.setAttribute("type", prop._dbus_signature)
977
 
                e.setAttribute("access", prop._dbus_access)
978
 
                return e
979
 
            for if_tag in document.getElementsByTagName("interface"):
980
 
                # Add property tags
981
 
                for tag in (make_tag(document, name, prop)
982
 
                            for name, prop
983
 
                            in self._get_all_dbus_things("property")
984
 
                            if prop._dbus_interface
985
 
                            == if_tag.getAttribute("name")):
986
 
                    if_tag.appendChild(tag)
987
 
                # Add annotation tags
988
 
                for typ in ("method", "signal", "property"):
989
 
                    for tag in if_tag.getElementsByTagName(typ):
990
 
                        annots = dict()
991
 
                        for name, prop in (self.
992
 
                                           _get_all_dbus_things(typ)):
993
 
                            if (name == tag.getAttribute("name")
994
 
                                and prop._dbus_interface
995
 
                                == if_tag.getAttribute("name")):
996
 
                                annots.update(getattr
997
 
                                              (prop,
998
 
                                               "_dbus_annotations",
999
 
                                               {}))
1000
 
                        for name, value in annots.iteritems():
1001
 
                            ann_tag = document.createElement(
1002
 
                                "annotation")
1003
 
                            ann_tag.setAttribute("name", name)
1004
 
                            ann_tag.setAttribute("value", value)
1005
 
                            tag.appendChild(ann_tag)
1006
 
                # Add interface annotation tags
1007
 
                for annotation, value in dict(
1008
 
                    itertools.chain.from_iterable(
1009
 
                        annotations().iteritems()
1010
 
                        for name, annotations in
1011
 
                        self._get_all_dbus_things("interface")
1012
 
                        if name == if_tag.getAttribute("name")
1013
 
                        )).iteritems():
1014
 
                    ann_tag = document.createElement("annotation")
1015
 
                    ann_tag.setAttribute("name", annotation)
1016
 
                    ann_tag.setAttribute("value", value)
1017
 
                    if_tag.appendChild(ann_tag)
1018
 
                # Add the names to the return values for the
1019
 
                # "org.freedesktop.DBus.Properties" methods
1020
 
                if (if_tag.getAttribute("name")
1021
 
                    == "org.freedesktop.DBus.Properties"):
1022
 
                    for cn in if_tag.getElementsByTagName("method"):
1023
 
                        if cn.getAttribute("name") == "Get":
1024
 
                            for arg in cn.getElementsByTagName("arg"):
1025
 
                                if (arg.getAttribute("direction")
1026
 
                                    == "out"):
1027
 
                                    arg.setAttribute("name", "value")
1028
 
                        elif cn.getAttribute("name") == "GetAll":
1029
 
                            for arg in cn.getElementsByTagName("arg"):
1030
 
                                if (arg.getAttribute("direction")
1031
 
                                    == "out"):
1032
 
                                    arg.setAttribute("name", "props")
1033
 
            xmlstring = document.toxml("utf-8")
1034
 
            document.unlink()
1035
 
        except (AttributeError, xml.dom.DOMException,
1036
 
                xml.parsers.expat.ExpatError) as error:
1037
 
            logger.error("Failed to override Introspection method",
1038
 
                         exc_info=error)
1039
 
        return xmlstring
1040
 
 
1041
 
 
1042
 
def datetime_to_dbus(dt, variant_level=0):
1043
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1044
 
    if dt is None:
1045
 
        return dbus.String("", variant_level = variant_level)
1046
 
    return dbus.String(dt.isoformat(),
1047
 
                       variant_level=variant_level)
1048
 
 
1049
 
 
1050
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1051
 
    """A class decorator; applied to a subclass of
1052
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1053
 
    interface names according to the "alt_interface_names" mapping.
1054
 
    Usage:
1055
 
    
1056
 
    @alternate_dbus_interfaces({"org.example.Interface":
1057
 
                                    "net.example.AlternateInterface"})
1058
 
    class SampleDBusObject(dbus.service.Object):
1059
 
        @dbus.service.method("org.example.Interface")
1060
 
        def SampleDBusMethod():
1061
 
            pass
1062
 
    
1063
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1064
 
    reachable via two interfaces: "org.example.Interface" and
1065
 
    "net.example.AlternateInterface", the latter of which will have
1066
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1067
 
    "true", unless "deprecate" is passed with a False value.
1068
 
    
1069
 
    This works for methods and signals, and also for D-Bus properties
1070
 
    (from DBusObjectWithProperties) and interfaces (from the
1071
 
    dbus_interface_annotations decorator).
1072
 
    """
1073
 
    def wrapper(cls):
1074
 
        for orig_interface_name, alt_interface_name in (
1075
 
            alt_interface_names.iteritems()):
1076
 
            attr = {}
1077
 
            interface_names = set()
1078
 
            # Go though all attributes of the class
1079
 
            for attrname, attribute in inspect.getmembers(cls):
1080
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1081
 
                # with the wrong interface name
1082
 
                if (not hasattr(attribute, "_dbus_interface")
1083
 
                    or not attribute._dbus_interface
1084
 
                    .startswith(orig_interface_name)):
1085
 
                    continue
1086
 
                # Create an alternate D-Bus interface name based on
1087
 
                # the current name
1088
 
                alt_interface = (attribute._dbus_interface
1089
 
                                 .replace(orig_interface_name,
1090
 
                                          alt_interface_name))
1091
 
                interface_names.add(alt_interface)
1092
 
                # Is this a D-Bus signal?
1093
 
                if getattr(attribute, "_dbus_is_signal", False):
1094
 
                    # Extract the original non-method undecorated
1095
 
                    # function by black magic
1096
 
                    nonmethod_func = (dict(
1097
 
                            zip(attribute.func_code.co_freevars,
1098
 
                                attribute.__closure__))["func"]
1099
 
                                      .cell_contents)
1100
 
                    # Create a new, but exactly alike, function
1101
 
                    # object, and decorate it to be a new D-Bus signal
1102
 
                    # with the alternate D-Bus interface name
1103
 
                    new_function = (dbus.service.signal
1104
 
                                    (alt_interface,
1105
 
                                     attribute._dbus_signature)
1106
 
                                    (types.FunctionType(
1107
 
                                nonmethod_func.func_code,
1108
 
                                nonmethod_func.func_globals,
1109
 
                                nonmethod_func.func_name,
1110
 
                                nonmethod_func.func_defaults,
1111
 
                                nonmethod_func.func_closure)))
1112
 
                    # Copy annotations, if any
1113
 
                    try:
1114
 
                        new_function._dbus_annotations = (
1115
 
                            dict(attribute._dbus_annotations))
1116
 
                    except AttributeError:
1117
 
                        pass
1118
 
                    # Define a creator of a function to call both the
1119
 
                    # original and alternate functions, so both the
1120
 
                    # original and alternate signals gets sent when
1121
 
                    # the function is called
1122
 
                    def fixscope(func1, func2):
1123
 
                        """This function is a scope container to pass
1124
 
                        func1 and func2 to the "call_both" function
1125
 
                        outside of its arguments"""
1126
 
                        def call_both(*args, **kwargs):
1127
 
                            """This function will emit two D-Bus
1128
 
                            signals by calling func1 and func2"""
1129
 
                            func1(*args, **kwargs)
1130
 
                            func2(*args, **kwargs)
1131
 
                        return call_both
1132
 
                    # Create the "call_both" function and add it to
1133
 
                    # the class
1134
 
                    attr[attrname] = fixscope(attribute, new_function)
1135
 
                # Is this a D-Bus method?
1136
 
                elif getattr(attribute, "_dbus_is_method", False):
1137
 
                    # Create a new, but exactly alike, function
1138
 
                    # object.  Decorate it to be a new D-Bus method
1139
 
                    # with the alternate D-Bus interface name.  Add it
1140
 
                    # to the class.
1141
 
                    attr[attrname] = (dbus.service.method
1142
 
                                      (alt_interface,
1143
 
                                       attribute._dbus_in_signature,
1144
 
                                       attribute._dbus_out_signature)
1145
 
                                      (types.FunctionType
1146
 
                                       (attribute.func_code,
1147
 
                                        attribute.func_globals,
1148
 
                                        attribute.func_name,
1149
 
                                        attribute.func_defaults,
1150
 
                                        attribute.func_closure)))
1151
 
                    # Copy annotations, if any
1152
 
                    try:
1153
 
                        attr[attrname]._dbus_annotations = (
1154
 
                            dict(attribute._dbus_annotations))
1155
 
                    except AttributeError:
1156
 
                        pass
1157
 
                # Is this a D-Bus property?
1158
 
                elif getattr(attribute, "_dbus_is_property", False):
1159
 
                    # Create a new, but exactly alike, function
1160
 
                    # object, and decorate it to be a new D-Bus
1161
 
                    # property with the alternate D-Bus interface
1162
 
                    # name.  Add it to the class.
1163
 
                    attr[attrname] = (dbus_service_property
1164
 
                                      (alt_interface,
1165
 
                                       attribute._dbus_signature,
1166
 
                                       attribute._dbus_access,
1167
 
                                       attribute
1168
 
                                       ._dbus_get_args_options
1169
 
                                       ["byte_arrays"])
1170
 
                                      (types.FunctionType
1171
 
                                       (attribute.func_code,
1172
 
                                        attribute.func_globals,
1173
 
                                        attribute.func_name,
1174
 
                                        attribute.func_defaults,
1175
 
                                        attribute.func_closure)))
1176
 
                    # Copy annotations, if any
1177
 
                    try:
1178
 
                        attr[attrname]._dbus_annotations = (
1179
 
                            dict(attribute._dbus_annotations))
1180
 
                    except AttributeError:
1181
 
                        pass
1182
 
                # Is this a D-Bus interface?
1183
 
                elif getattr(attribute, "_dbus_is_interface", False):
1184
 
                    # Create a new, but exactly alike, function
1185
 
                    # object.  Decorate it to be a new D-Bus interface
1186
 
                    # with the alternate D-Bus interface name.  Add it
1187
 
                    # to the class.
1188
 
                    attr[attrname] = (dbus_interface_annotations
1189
 
                                      (alt_interface)
1190
 
                                      (types.FunctionType
1191
 
                                       (attribute.func_code,
1192
 
                                        attribute.func_globals,
1193
 
                                        attribute.func_name,
1194
 
                                        attribute.func_defaults,
1195
 
                                        attribute.func_closure)))
1196
 
            if deprecate:
1197
 
                # Deprecate all alternate interfaces
1198
 
                iname="_AlternateDBusNames_interface_annotation{0}"
1199
 
                for interface_name in interface_names:
1200
 
                    @dbus_interface_annotations(interface_name)
1201
 
                    def func(self):
1202
 
                        return { "org.freedesktop.DBus.Deprecated":
1203
 
                                     "true" }
1204
 
                    # Find an unused name
1205
 
                    for aname in (iname.format(i)
1206
 
                                  for i in itertools.count()):
1207
 
                        if aname not in attr:
1208
 
                            attr[aname] = func
1209
 
                            break
1210
 
            if interface_names:
1211
 
                # Replace the class with a new subclass of it with
1212
 
                # methods, signals, etc. as created above.
1213
 
                cls = type(b"{0}Alternate".format(cls.__name__),
1214
 
                           (cls,), attr)
1215
 
        return cls
1216
 
    return wrapper
1217
 
 
1218
 
 
1219
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1220
 
                                "se.bsnet.fukt.Mandos"})
1221
 
class ClientDBus(Client, DBusObjectWithProperties):
1222
 
    """A Client class using D-Bus
1223
 
    
1224
 
    Attributes:
1225
 
    dbus_object_path: dbus.ObjectPath
1226
 
    bus: dbus.SystemBus()
1227
 
    """
1228
 
    
1229
 
    runtime_expansions = (Client.runtime_expansions
1230
 
                          + ("dbus_object_path",))
1231
 
    
1232
 
    # dbus.service.Object doesn't use super(), so we can't either.
1233
 
    
1234
 
    def __init__(self, bus = None, *args, **kwargs):
1235
 
        self.bus = bus
1236
 
        Client.__init__(self, *args, **kwargs)
1237
 
        # Only now, when this client is initialized, can it show up on
1238
 
        # the D-Bus
1239
 
        client_object_name = unicode(self.name).translate(
1240
 
            {ord("."): ord("_"),
1241
 
             ord("-"): ord("_")})
1242
 
        self.dbus_object_path = (dbus.ObjectPath
1243
 
                                 ("/clients/" + client_object_name))
1244
 
        DBusObjectWithProperties.__init__(self, self.bus,
1245
 
                                          self.dbus_object_path)
1246
 
    
1247
 
    def notifychangeproperty(transform_func,
1248
 
                             dbus_name, type_func=lambda x: x,
1249
 
                             variant_level=1):
1250
 
        """ Modify a variable so that it's a property which announces
1251
 
        its changes to DBus.
1252
 
        
1253
 
        transform_fun: Function that takes a value and a variant_level
1254
 
                       and transforms it to a D-Bus type.
1255
 
        dbus_name: D-Bus name of the variable
1256
 
        type_func: Function that transform the value before sending it
1257
 
                   to the D-Bus.  Default: no transform
1258
 
        variant_level: D-Bus variant level.  Default: 1
1259
 
        """
1260
 
        attrname = "_{0}".format(dbus_name)
1261
 
        def setter(self, value):
1262
 
            if hasattr(self, "dbus_object_path"):
1263
 
                if (not hasattr(self, attrname) or
1264
 
                    type_func(getattr(self, attrname, None))
1265
 
                    != type_func(value)):
1266
 
                    dbus_value = transform_func(type_func(value),
1267
 
                                                variant_level
1268
 
                                                =variant_level)
1269
 
                    self.PropertyChanged(dbus.String(dbus_name),
1270
 
                                         dbus_value)
1271
 
            setattr(self, attrname, value)
1272
 
        
1273
 
        return property(lambda self: getattr(self, attrname), setter)
1274
 
    
1275
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1276
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1277
 
                                             "ApprovalPending",
1278
 
                                             type_func = bool)
1279
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1280
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1281
 
                                        "LastEnabled")
1282
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1283
 
                                   type_func = lambda checker:
1284
 
                                       checker is not None)
1285
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1286
 
                                           "LastCheckedOK")
1287
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1288
 
                                               "LastCheckerStatus")
1289
 
    last_approval_request = notifychangeproperty(
1290
 
        datetime_to_dbus, "LastApprovalRequest")
1291
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1292
 
                                               "ApprovedByDefault")
1293
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1294
 
                                          "ApprovalDelay",
1295
 
                                          type_func =
1296
 
                                          timedelta_to_milliseconds)
1297
 
    approval_duration = notifychangeproperty(
1298
 
        dbus.UInt64, "ApprovalDuration",
1299
 
        type_func = timedelta_to_milliseconds)
1300
 
    host = notifychangeproperty(dbus.String, "Host")
1301
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1302
 
                                   type_func =
1303
 
                                   timedelta_to_milliseconds)
1304
 
    extended_timeout = notifychangeproperty(
1305
 
        dbus.UInt64, "ExtendedTimeout",
1306
 
        type_func = timedelta_to_milliseconds)
1307
 
    interval = notifychangeproperty(dbus.UInt64,
1308
 
                                    "Interval",
1309
 
                                    type_func =
1310
 
                                    timedelta_to_milliseconds)
1311
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1312
 
    
1313
 
    del notifychangeproperty
1314
 
    
1315
 
    def __del__(self, *args, **kwargs):
1316
 
        try:
1317
 
            self.remove_from_connection()
1318
 
        except LookupError:
1319
 
            pass
1320
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1321
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1322
 
        Client.__del__(self, *args, **kwargs)
1323
 
    
1324
 
    def checker_callback(self, pid, condition, command,
1325
 
                         *args, **kwargs):
1326
 
        self.checker_callback_tag = None
1327
 
        self.checker = None
1328
 
        if os.WIFEXITED(condition):
1329
 
            exitstatus = os.WEXITSTATUS(condition)
1330
 
            # Emit D-Bus signal
1331
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1332
 
                                  dbus.Int64(condition),
1333
 
                                  dbus.String(command))
1334
 
        else:
1335
 
            # Emit D-Bus signal
1336
 
            self.CheckerCompleted(dbus.Int16(-1),
1337
 
                                  dbus.Int64(condition),
1338
 
                                  dbus.String(command))
1339
 
        
1340
 
        return Client.checker_callback(self, pid, condition, command,
1341
 
                                       *args, **kwargs)
1342
 
    
1343
 
    def start_checker(self, *args, **kwargs):
1344
 
        old_checker = self.checker
1345
 
        if self.checker is not None:
1346
 
            old_checker_pid = self.checker.pid
1347
 
        else:
1348
 
            old_checker_pid = None
1349
 
        r = Client.start_checker(self, *args, **kwargs)
1350
 
        # Only if new checker process was started
1351
 
        if (self.checker is not None
1352
 
            and old_checker_pid != self.checker.pid):
1353
 
            # Emit D-Bus signal
1354
 
            self.CheckerStarted(self.current_checker_command)
1355
 
        return r
1356
 
    
1357
 
    def _reset_approved(self):
1358
 
        self.approved = None
1359
 
        return False
1360
 
    
1361
 
    def approve(self, value=True):
1362
 
        self.approved = value
1363
 
        gobject.timeout_add(timedelta_to_milliseconds
1364
 
                            (self.approval_duration),
1365
 
                            self._reset_approved)
1366
 
        self.send_changedstate()
1367
 
    
1368
 
    ## D-Bus methods, signals & properties
1369
 
    _interface = "se.recompile.Mandos.Client"
1370
 
    
1371
 
    ## Interfaces
1372
 
    
1373
 
    @dbus_interface_annotations(_interface)
1374
 
    def _foo(self):
1375
 
        return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1376
 
                     "false"}
1377
 
    
1378
 
    ## Signals
1379
 
    
1380
 
    # CheckerCompleted - signal
1381
 
    @dbus.service.signal(_interface, signature="nxs")
1382
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1383
 
        "D-Bus signal"
1384
 
        pass
1385
 
    
1386
 
    # CheckerStarted - signal
1387
 
    @dbus.service.signal(_interface, signature="s")
1388
 
    def CheckerStarted(self, command):
1389
 
        "D-Bus signal"
1390
 
        pass
1391
 
    
1392
 
    # PropertyChanged - signal
1393
 
    @dbus.service.signal(_interface, signature="sv")
1394
 
    def PropertyChanged(self, property, value):
1395
 
        "D-Bus signal"
1396
 
        pass
1397
 
    
1398
 
    # GotSecret - signal
1399
 
    @dbus.service.signal(_interface)
1400
 
    def GotSecret(self):
1401
 
        """D-Bus signal
1402
 
        Is sent after a successful transfer of secret from the Mandos
1403
 
        server to mandos-client
1404
 
        """
1405
 
        pass
1406
 
    
1407
 
    # Rejected - signal
1408
 
    @dbus.service.signal(_interface, signature="s")
1409
 
    def Rejected(self, reason):
1410
 
        "D-Bus signal"
1411
 
        pass
1412
 
    
1413
 
    # NeedApproval - signal
1414
 
    @dbus.service.signal(_interface, signature="tb")
1415
 
    def NeedApproval(self, timeout, default):
1416
 
        "D-Bus signal"
1417
 
        return self.need_approval()
1418
 
    
1419
 
    ## Methods
1420
 
    
1421
 
    # Approve - method
1422
 
    @dbus.service.method(_interface, in_signature="b")
1423
 
    def Approve(self, value):
1424
 
        self.approve(value)
1425
 
    
1426
 
    # CheckedOK - method
1427
 
    @dbus.service.method(_interface)
1428
 
    def CheckedOK(self):
1429
 
        self.checked_ok()
1430
 
    
1431
 
    # Enable - method
1432
 
    @dbus.service.method(_interface)
1433
 
    def Enable(self):
1434
 
        "D-Bus method"
1435
 
        self.enable()
1436
 
    
1437
 
    # StartChecker - method
1438
 
    @dbus.service.method(_interface)
1439
 
    def StartChecker(self):
1440
 
        "D-Bus method"
1441
 
        self.start_checker()
1442
 
    
1443
 
    # Disable - method
1444
 
    @dbus.service.method(_interface)
1445
 
    def Disable(self):
1446
 
        "D-Bus method"
1447
 
        self.disable()
1448
 
    
1449
 
    # StopChecker - method
1450
 
    @dbus.service.method(_interface)
1451
 
    def StopChecker(self):
1452
 
        self.stop_checker()
1453
 
    
1454
 
    ## Properties
1455
 
    
1456
 
    # ApprovalPending - property
1457
 
    @dbus_service_property(_interface, signature="b", access="read")
1458
 
    def ApprovalPending_dbus_property(self):
1459
 
        return dbus.Boolean(bool(self.approvals_pending))
1460
 
    
1461
 
    # ApprovedByDefault - property
1462
 
    @dbus_service_property(_interface, signature="b",
1463
 
                           access="readwrite")
1464
 
    def ApprovedByDefault_dbus_property(self, value=None):
1465
 
        if value is None:       # get
1466
 
            return dbus.Boolean(self.approved_by_default)
1467
 
        self.approved_by_default = bool(value)
1468
 
    
1469
 
    # ApprovalDelay - property
1470
 
    @dbus_service_property(_interface, signature="t",
1471
 
                           access="readwrite")
1472
 
    def ApprovalDelay_dbus_property(self, value=None):
1473
 
        if value is None:       # get
1474
 
            return dbus.UInt64(self.approval_delay_milliseconds())
1475
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1476
 
    
1477
 
    # ApprovalDuration - property
1478
 
    @dbus_service_property(_interface, signature="t",
1479
 
                           access="readwrite")
1480
 
    def ApprovalDuration_dbus_property(self, value=None):
1481
 
        if value is None:       # get
1482
 
            return dbus.UInt64(timedelta_to_milliseconds(
1483
 
                    self.approval_duration))
1484
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1485
 
    
1486
 
    # Name - property
1487
 
    @dbus_service_property(_interface, signature="s", access="read")
1488
 
    def Name_dbus_property(self):
1489
 
        return dbus.String(self.name)
1490
 
    
1491
 
    # Fingerprint - property
1492
 
    @dbus_service_property(_interface, signature="s", access="read")
1493
 
    def Fingerprint_dbus_property(self):
1494
 
        return dbus.String(self.fingerprint)
1495
 
    
1496
 
    # Host - property
1497
 
    @dbus_service_property(_interface, signature="s",
1498
 
                           access="readwrite")
1499
 
    def Host_dbus_property(self, value=None):
1500
 
        if value is None:       # get
1501
 
            return dbus.String(self.host)
1502
 
        self.host = unicode(value)
1503
 
    
1504
 
    # Created - property
1505
 
    @dbus_service_property(_interface, signature="s", access="read")
1506
 
    def Created_dbus_property(self):
1507
 
        return datetime_to_dbus(self.created)
1508
 
    
1509
 
    # LastEnabled - property
1510
 
    @dbus_service_property(_interface, signature="s", access="read")
1511
 
    def LastEnabled_dbus_property(self):
1512
 
        return datetime_to_dbus(self.last_enabled)
1513
 
    
1514
 
    # Enabled - property
1515
 
    @dbus_service_property(_interface, signature="b",
1516
 
                           access="readwrite")
1517
 
    def Enabled_dbus_property(self, value=None):
1518
 
        if value is None:       # get
1519
 
            return dbus.Boolean(self.enabled)
1520
 
        if value:
1521
 
            self.enable()
1522
 
        else:
1523
 
            self.disable()
1524
 
    
1525
 
    # LastCheckedOK - property
1526
 
    @dbus_service_property(_interface, signature="s",
1527
 
                           access="readwrite")
1528
 
    def LastCheckedOK_dbus_property(self, value=None):
1529
 
        if value is not None:
1530
 
            self.checked_ok()
1531
 
            return
1532
 
        return datetime_to_dbus(self.last_checked_ok)
1533
 
    
1534
 
    # LastCheckerStatus - property
1535
 
    @dbus_service_property(_interface, signature="n",
1536
 
                           access="read")
1537
 
    def LastCheckerStatus_dbus_property(self):
1538
 
        return dbus.Int16(self.last_checker_status)
1539
 
    
1540
 
    # Expires - property
1541
 
    @dbus_service_property(_interface, signature="s", access="read")
1542
 
    def Expires_dbus_property(self):
1543
 
        return datetime_to_dbus(self.expires)
1544
 
    
1545
 
    # LastApprovalRequest - property
1546
 
    @dbus_service_property(_interface, signature="s", access="read")
1547
 
    def LastApprovalRequest_dbus_property(self):
1548
 
        return datetime_to_dbus(self.last_approval_request)
1549
 
    
1550
 
    # Timeout - property
1551
 
    @dbus_service_property(_interface, signature="t",
1552
 
                           access="readwrite")
1553
 
    def Timeout_dbus_property(self, value=None):
1554
 
        if value is None:       # get
1555
 
            return dbus.UInt64(self.timeout_milliseconds())
1556
 
        old_timeout = self.timeout
1557
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1558
 
        # Reschedule disabling
1559
 
        if self.enabled:
1560
 
            now = datetime.datetime.utcnow()
1561
 
            self.expires += self.timeout - old_timeout
1562
 
            if self.expires <= now:
1563
 
                # The timeout has passed
1564
 
                self.disable()
1565
 
            else:
1566
 
                if (getattr(self, "disable_initiator_tag", None)
1567
 
                    is None):
1568
 
                    return
1569
 
                gobject.source_remove(self.disable_initiator_tag)
1570
 
                self.disable_initiator_tag = (
1571
 
                    gobject.timeout_add(
1572
 
                        timedelta_to_milliseconds(self.expires - now),
1573
 
                        self.disable))
1574
 
    
1575
 
    # ExtendedTimeout - property
1576
 
    @dbus_service_property(_interface, signature="t",
1577
 
                           access="readwrite")
1578
 
    def ExtendedTimeout_dbus_property(self, value=None):
1579
 
        if value is None:       # get
1580
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
1581
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1582
 
    
1583
 
    # Interval - property
1584
 
    @dbus_service_property(_interface, signature="t",
1585
 
                           access="readwrite")
1586
 
    def Interval_dbus_property(self, value=None):
1587
 
        if value is None:       # get
1588
 
            return dbus.UInt64(self.interval_milliseconds())
1589
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1590
 
        if getattr(self, "checker_initiator_tag", None) is None:
1591
 
            return
1592
 
        if self.enabled:
1593
 
            # Reschedule checker run
1594
 
            gobject.source_remove(self.checker_initiator_tag)
1595
 
            self.checker_initiator_tag = (gobject.timeout_add
1596
 
                                          (value, self.start_checker))
1597
 
            self.start_checker()    # Start one now, too
1598
 
    
1599
 
    # Checker - property
1600
 
    @dbus_service_property(_interface, signature="s",
1601
 
                           access="readwrite")
1602
 
    def Checker_dbus_property(self, value=None):
1603
 
        if value is None:       # get
1604
 
            return dbus.String(self.checker_command)
1605
 
        self.checker_command = unicode(value)
1606
 
    
1607
 
    # CheckerRunning - property
1608
 
    @dbus_service_property(_interface, signature="b",
1609
 
                           access="readwrite")
1610
 
    def CheckerRunning_dbus_property(self, value=None):
1611
 
        if value is None:       # get
1612
 
            return dbus.Boolean(self.checker is not None)
1613
 
        if value:
1614
 
            self.start_checker()
1615
 
        else:
1616
 
            self.stop_checker()
1617
 
    
1618
 
    # ObjectPath - property
1619
 
    @dbus_service_property(_interface, signature="o", access="read")
1620
 
    def ObjectPath_dbus_property(self):
1621
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1622
 
    
1623
 
    # Secret = property
1624
 
    @dbus_service_property(_interface, signature="ay",
1625
 
                           access="write", byte_arrays=True)
1626
 
    def Secret_dbus_property(self, value):
1627
 
        self.secret = str(value)
1628
 
    
1629
 
    del _interface
1630
 
 
1631
 
 
1632
 
class ProxyClient(object):
1633
 
    def __init__(self, child_pipe, fpr, address):
1634
 
        self._pipe = child_pipe
1635
 
        self._pipe.send(('init', fpr, address))
1636
 
        if not self._pipe.recv():
1637
 
            raise KeyError()
1638
 
    
1639
 
    def __getattribute__(self, name):
1640
 
        if name == '_pipe':
1641
 
            return super(ProxyClient, self).__getattribute__(name)
1642
 
        self._pipe.send(('getattr', name))
1643
 
        data = self._pipe.recv()
1644
 
        if data[0] == 'data':
1645
 
            return data[1]
1646
 
        if data[0] == 'function':
1647
 
            def func(*args, **kwargs):
1648
 
                self._pipe.send(('funcall', name, args, kwargs))
1649
 
                return self._pipe.recv()[1]
1650
 
            return func
1651
 
    
1652
 
    def __setattr__(self, name, value):
1653
 
        if name == '_pipe':
1654
 
            return super(ProxyClient, self).__setattr__(name, value)
1655
 
        self._pipe.send(('setattr', name, value))
1656
 
 
1657
 
 
1658
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1659
 
    """A class to handle client connections.
1660
 
    
1661
 
    Instantiated once for each connection to handle it.
1662
 
    Note: This will run in its own forked process."""
1663
 
    
1664
 
    def handle(self):
1665
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1666
 
            logger.info("TCP connection from: %s",
1667
 
                        unicode(self.client_address))
1668
 
            logger.debug("Pipe FD: %d",
1669
 
                         self.server.child_pipe.fileno())
1670
 
            
1671
 
            session = (gnutls.connection
1672
 
                       .ClientSession(self.request,
1673
 
                                      gnutls.connection
1674
 
                                      .X509Credentials()))
1675
 
            
1676
 
            # Note: gnutls.connection.X509Credentials is really a
1677
 
            # generic GnuTLS certificate credentials object so long as
1678
 
            # no X.509 keys are added to it.  Therefore, we can use it
1679
 
            # here despite using OpenPGP certificates.
1680
 
            
1681
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1682
 
            #                      "+AES-256-CBC", "+SHA1",
1683
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1684
 
            #                      "+DHE-DSS"))
1685
 
            # Use a fallback default, since this MUST be set.
1686
 
            priority = self.server.gnutls_priority
1687
 
            if priority is None:
1688
 
                priority = "NORMAL"
1689
 
            (gnutls.library.functions
1690
 
             .gnutls_priority_set_direct(session._c_object,
1691
 
                                         priority, None))
1692
 
            
1693
 
            # Start communication using the Mandos protocol
1694
 
            # Get protocol number
1695
 
            line = self.request.makefile().readline()
1696
 
            logger.debug("Protocol version: %r", line)
1697
 
            try:
1698
 
                if int(line.strip().split()[0]) > 1:
1699
 
                    raise RuntimeError
1700
 
            except (ValueError, IndexError, RuntimeError) as error:
1701
 
                logger.error("Unknown protocol version: %s", error)
1702
 
                return
1703
 
            
1704
 
            # Start GnuTLS connection
1705
 
            try:
1706
 
                session.handshake()
1707
 
            except gnutls.errors.GNUTLSError as error:
1708
 
                logger.warning("Handshake failed: %s", error)
1709
 
                # Do not run session.bye() here: the session is not
1710
 
                # established.  Just abandon the request.
1711
 
                return
1712
 
            logger.debug("Handshake succeeded")
1713
 
            
1714
 
            approval_required = False
1715
 
            try:
1716
 
                try:
1717
 
                    fpr = self.fingerprint(self.peer_certificate
1718
 
                                           (session))
1719
 
                except (TypeError,
1720
 
                        gnutls.errors.GNUTLSError) as error:
1721
 
                    logger.warning("Bad certificate: %s", error)
1722
 
                    return
1723
 
                logger.debug("Fingerprint: %s", fpr)
1724
 
                
1725
 
                try:
1726
 
                    client = ProxyClient(child_pipe, fpr,
1727
 
                                         self.client_address)
1728
 
                except KeyError:
1729
 
                    return
1730
 
                
1731
 
                if client.approval_delay:
1732
 
                    delay = client.approval_delay
1733
 
                    client.approvals_pending += 1
1734
 
                    approval_required = True
1735
 
                
1736
 
                while True:
1737
 
                    if not client.enabled:
1738
 
                        logger.info("Client %s is disabled",
1739
 
                                       client.name)
1740
 
                        if self.server.use_dbus:
1741
 
                            # Emit D-Bus signal
1742
 
                            client.Rejected("Disabled")
1743
 
                        return
1744
 
                    
1745
 
                    if client.approved or not client.approval_delay:
1746
 
                        #We are approved or approval is disabled
1747
 
                        break
1748
 
                    elif client.approved is None:
1749
 
                        logger.info("Client %s needs approval",
1750
 
                                    client.name)
1751
 
                        if self.server.use_dbus:
1752
 
                            # Emit D-Bus signal
1753
 
                            client.NeedApproval(
1754
 
                                client.approval_delay_milliseconds(),
1755
 
                                client.approved_by_default)
1756
 
                    else:
1757
 
                        logger.warning("Client %s was not approved",
1758
 
                                       client.name)
1759
 
                        if self.server.use_dbus:
1760
 
                            # Emit D-Bus signal
1761
 
                            client.Rejected("Denied")
1762
 
                        return
1763
 
                    
1764
 
                    #wait until timeout or approved
1765
 
                    time = datetime.datetime.now()
1766
 
                    client.changedstate.acquire()
1767
 
                    client.changedstate.wait(
1768
 
                        float(timedelta_to_milliseconds(delay)
1769
 
                              / 1000))
1770
 
                    client.changedstate.release()
1771
 
                    time2 = datetime.datetime.now()
1772
 
                    if (time2 - time) >= delay:
1773
 
                        if not client.approved_by_default:
1774
 
                            logger.warning("Client %s timed out while"
1775
 
                                           " waiting for approval",
1776
 
                                           client.name)
1777
 
                            if self.server.use_dbus:
1778
 
                                # Emit D-Bus signal
1779
 
                                client.Rejected("Approval timed out")
1780
 
                            return
1781
 
                        else:
1782
 
                            break
1783
 
                    else:
1784
 
                        delay -= time2 - time
1785
 
                
1786
 
                sent_size = 0
1787
 
                while sent_size < len(client.secret):
1788
 
                    try:
1789
 
                        sent = session.send(client.secret[sent_size:])
1790
 
                    except gnutls.errors.GNUTLSError as error:
1791
 
                        logger.warning("gnutls send failed",
1792
 
                                       exc_info=error)
1793
 
                        return
1794
 
                    logger.debug("Sent: %d, remaining: %d",
1795
 
                                 sent, len(client.secret)
1796
 
                                 - (sent_size + sent))
1797
 
                    sent_size += sent
1798
 
                
1799
 
                logger.info("Sending secret to %s", client.name)
1800
 
                # bump the timeout using extended_timeout
1801
 
                client.bump_timeout(client.extended_timeout)
1802
 
                if self.server.use_dbus:
1803
 
                    # Emit D-Bus signal
1804
 
                    client.GotSecret()
1805
 
            
1806
 
            finally:
1807
 
                if approval_required:
1808
 
                    client.approvals_pending -= 1
1809
 
                try:
1810
 
                    session.bye()
1811
 
                except gnutls.errors.GNUTLSError as error:
1812
 
                    logger.warning("GnuTLS bye failed",
1813
 
                                   exc_info=error)
1814
 
    
1815
 
    @staticmethod
1816
 
    def peer_certificate(session):
1817
 
        "Return the peer's OpenPGP certificate as a bytestring"
1818
 
        # If not an OpenPGP certificate...
1819
 
        if (gnutls.library.functions
1820
 
            .gnutls_certificate_type_get(session._c_object)
1821
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1822
 
            # ...do the normal thing
1823
 
            return session.peer_certificate
1824
 
        list_size = ctypes.c_uint(1)
1825
 
        cert_list = (gnutls.library.functions
1826
 
                     .gnutls_certificate_get_peers
1827
 
                     (session._c_object, ctypes.byref(list_size)))
1828
 
        if not bool(cert_list) and list_size.value != 0:
1829
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1830
 
                                            " certificate")
1831
 
        if list_size.value == 0:
 
68
        if self.checker is None:
 
69
            return
 
70
        os.kill(self.checker.pid, signal.SIGTERM)
 
71
        if self.checker.poll() is None:
 
72
            os.kill(self.checker.pid, signal.SIGKILL)
 
73
        self.checker = None
 
74
    __del__ = stop_checker
 
75
    def fileno(self):
 
76
        if self.checker is None:
1832
77
            return None
1833
 
        cert = cert_list[0]
1834
 
        return ctypes.string_at(cert.data, cert.size)
1835
 
    
1836
 
    @staticmethod
1837
 
    def fingerprint(openpgp):
1838
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1839
 
        # New GnuTLS "datum" with the OpenPGP public key
1840
 
        datum = (gnutls.library.types
1841
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1842
 
                                             ctypes.POINTER
1843
 
                                             (ctypes.c_ubyte)),
1844
 
                                 ctypes.c_uint(len(openpgp))))
1845
 
        # New empty GnuTLS certificate
1846
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1847
 
        (gnutls.library.functions
1848
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1849
 
        # Import the OpenPGP public key into the certificate
1850
 
        (gnutls.library.functions
1851
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1852
 
                                    gnutls.library.constants
1853
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1854
 
        # Verify the self signature in the key
1855
 
        crtverify = ctypes.c_uint()
1856
 
        (gnutls.library.functions
1857
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1858
 
                                         ctypes.byref(crtverify)))
1859
 
        if crtverify.value != 0:
1860
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1861
 
            raise (gnutls.errors.CertificateSecurityError
1862
 
                   ("Verify failed"))
1863
 
        # New buffer for the fingerprint
1864
 
        buf = ctypes.create_string_buffer(20)
1865
 
        buf_len = ctypes.c_size_t()
1866
 
        # Get the fingerprint from the certificate into the buffer
1867
 
        (gnutls.library.functions
1868
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1869
 
                                             ctypes.byref(buf_len)))
1870
 
        # Deinit the certificate
1871
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1872
 
        # Convert the buffer to a Python bytestring
1873
 
        fpr = ctypes.string_at(buf, buf_len.value)
1874
 
        # Convert the bytestring to hexadecimal notation
1875
 
        hex_fpr = binascii.hexlify(fpr).upper()
1876
 
        return hex_fpr
1877
 
 
1878
 
 
1879
 
class MultiprocessingMixIn(object):
1880
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1881
 
    def sub_process_main(self, request, address):
1882
 
        try:
1883
 
            self.finish_request(request, address)
1884
 
        except Exception:
1885
 
            self.handle_error(request, address)
1886
 
        self.close_request(request)
1887
 
    
1888
 
    def process_request(self, request, address):
1889
 
        """Start a new process to process the request."""
1890
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1891
 
                                       args = (request, address))
1892
 
        proc.start()
1893
 
        return proc
1894
 
 
1895
 
 
1896
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1897
 
    """ adds a pipe to the MixIn """
1898
 
    def process_request(self, request, client_address):
1899
 
        """Overrides and wraps the original process_request().
1900
 
        
1901
 
        This function creates a new pipe in self.pipe
1902
 
        """
1903
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1904
 
        
1905
 
        proc = MultiprocessingMixIn.process_request(self, request,
1906
 
                                                    client_address)
1907
 
        self.child_pipe.close()
1908
 
        self.add_pipe(parent_pipe, proc)
1909
 
    
1910
 
    def add_pipe(self, parent_pipe, proc):
1911
 
        """Dummy function; override as necessary"""
1912
 
        raise NotImplementedError
1913
 
 
1914
 
 
1915
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1916
 
                     socketserver.TCPServer, object):
1917
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1918
 
    
1919
 
    Attributes:
1920
 
        enabled:        Boolean; whether this server is activated yet
1921
 
        interface:      None or a network interface name (string)
1922
 
        use_ipv6:       Boolean; to use IPv6 or not
1923
 
    """
1924
 
    def __init__(self, server_address, RequestHandlerClass,
1925
 
                 interface=None, use_ipv6=True, socketfd=None):
1926
 
        """If socketfd is set, use that file descriptor instead of
1927
 
        creating a new one with socket.socket().
1928
 
        """
1929
 
        self.interface = interface
1930
 
        if use_ipv6:
1931
 
            self.address_family = socket.AF_INET6
1932
 
        if socketfd is not None:
1933
 
            # Save the file descriptor
1934
 
            self.socketfd = socketfd
1935
 
            # Save the original socket.socket() function
1936
 
            self.socket_socket = socket.socket
1937
 
            # To implement --socket, we monkey patch socket.socket.
1938
 
            # 
1939
 
            # (When socketserver.TCPServer is a new-style class, we
1940
 
            # could make self.socket into a property instead of monkey
1941
 
            # patching socket.socket.)
1942
 
            # 
1943
 
            # Create a one-time-only replacement for socket.socket()
1944
 
            @functools.wraps(socket.socket)
1945
 
            def socket_wrapper(*args, **kwargs):
1946
 
                # Restore original function so subsequent calls are
1947
 
                # not affected.
1948
 
                socket.socket = self.socket_socket
1949
 
                del self.socket_socket
1950
 
                # This time only, return a new socket object from the
1951
 
                # saved file descriptor.
1952
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1953
 
            # Replace socket.socket() function with wrapper
1954
 
            socket.socket = socket_wrapper
1955
 
        # The socketserver.TCPServer.__init__ will call
1956
 
        # socket.socket(), which might be our replacement,
1957
 
        # socket_wrapper(), if socketfd was set.
1958
 
        socketserver.TCPServer.__init__(self, server_address,
1959
 
                                        RequestHandlerClass)
1960
 
    
1961
 
    def server_bind(self):
1962
 
        """This overrides the normal server_bind() function
1963
 
        to bind to an interface if one was specified, and also NOT to
1964
 
        bind to an address or port if they were not specified."""
1965
 
        if self.interface is not None:
1966
 
            if SO_BINDTODEVICE is None:
1967
 
                logger.error("SO_BINDTODEVICE does not exist;"
1968
 
                             " cannot bind to interface %s",
1969
 
                             self.interface)
1970
 
            else:
 
78
        return self.checker.stdout.fileno()
 
79
    def next_stop(self):
 
80
        """The time when something must be done about this client"""
 
81
        return min(self.last_seen + self.timeout, self.next_check)
 
82
    def still_valid(self, now=None):
 
83
        """Has this client's timeout not passed?"""
 
84
        if now is None:
 
85
            now = datetime.datetime.now()
 
86
        return now < (self.last_seen + timeout)
 
87
    def it_is_time_to_check(self, now=None):
 
88
        if now is None:
 
89
            now = datetime.datetime.now()
 
90
        return self.next_check <= now
 
91
 
 
92
 
 
93
class server_metaclass(type):
 
94
    "Common behavior for the UDP and TCP server classes"
 
95
    def __new__(cls, name, bases, attrs):
 
96
        attrs["address_family"] = socket.AF_INET6
 
97
        attrs["allow_reuse_address"] = True
 
98
        def server_bind(self):
 
99
            if self.options.interface:
 
100
                if not hasattr(socket, "SO_BINDTODEVICE"):
 
101
                    # From /usr/include/asm-i486/socket.h
 
102
                    socket.SO_BINDTODEVICE = 25
1971
103
                try:
1972
104
                    self.socket.setsockopt(socket.SOL_SOCKET,
1973
 
                                           SO_BINDTODEVICE,
1974
 
                                           str(self.interface + '\0'))
1975
 
                except socket.error as error:
1976
 
                    if error.errno == errno.EPERM:
1977
 
                        logger.error("No permission to bind to"
1978
 
                                     " interface %s", self.interface)
1979
 
                    elif error.errno == errno.ENOPROTOOPT:
1980
 
                        logger.error("SO_BINDTODEVICE not available;"
1981
 
                                     " cannot bind to interface %s",
1982
 
                                     self.interface)
1983
 
                    elif error.errno == errno.ENODEV:
1984
 
                        logger.error("Interface %s does not exist,"
1985
 
                                     " cannot bind", self.interface)
 
105
                                           socket.SO_BINDTODEVICE,
 
106
                                           self.options.interface)
 
107
                except socket.error, error:
 
108
                    if error[0] == errno.EPERM:
 
109
                        print "Warning: No permission to bind to interface", \
 
110
                              self.options.interface
1986
111
                    else:
1987
 
                        raise
1988
 
        # Only bind(2) the socket if we really need to.
1989
 
        if self.server_address[0] or self.server_address[1]:
1990
 
            if not self.server_address[0]:
1991
 
                if self.address_family == socket.AF_INET6:
1992
 
                    any_address = "::" # in6addr_any
1993
 
                else:
1994
 
                    any_address = "0.0.0.0" # INADDR_ANY
1995
 
                self.server_address = (any_address,
1996
 
                                       self.server_address[1])
1997
 
            elif not self.server_address[1]:
1998
 
                self.server_address = (self.server_address[0],
1999
 
                                       0)
2000
 
#                 if self.interface:
2001
 
#                     self.server_address = (self.server_address[0],
2002
 
#                                            0, # port
2003
 
#                                            0, # flowinfo
2004
 
#                                            if_nametoindex
2005
 
#                                            (self.interface))
2006
 
            return socketserver.TCPServer.server_bind(self)
2007
 
 
2008
 
 
2009
 
class MandosServer(IPv6_TCPServer):
2010
 
    """Mandos server.
2011
 
    
2012
 
    Attributes:
2013
 
        clients:        set of Client objects
2014
 
        gnutls_priority GnuTLS priority string
2015
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2016
 
    
2017
 
    Assumes a gobject.MainLoop event loop.
2018
 
    """
2019
 
    def __init__(self, server_address, RequestHandlerClass,
2020
 
                 interface=None, use_ipv6=True, clients=None,
2021
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
2022
 
        self.enabled = False
2023
 
        self.clients = clients
2024
 
        if self.clients is None:
2025
 
            self.clients = {}
2026
 
        self.use_dbus = use_dbus
2027
 
        self.gnutls_priority = gnutls_priority
2028
 
        IPv6_TCPServer.__init__(self, server_address,
2029
 
                                RequestHandlerClass,
2030
 
                                interface = interface,
2031
 
                                use_ipv6 = use_ipv6,
2032
 
                                socketfd = socketfd)
2033
 
    def server_activate(self):
2034
 
        if self.enabled:
2035
 
            return socketserver.TCPServer.server_activate(self)
2036
 
    
2037
 
    def enable(self):
2038
 
        self.enabled = True
2039
 
    
2040
 
    def add_pipe(self, parent_pipe, proc):
2041
 
        # Call "handle_ipc" for both data and EOF events
2042
 
        gobject.io_add_watch(parent_pipe.fileno(),
2043
 
                             gobject.IO_IN | gobject.IO_HUP,
2044
 
                             functools.partial(self.handle_ipc,
2045
 
                                               parent_pipe =
2046
 
                                               parent_pipe,
2047
 
                                               proc = proc))
2048
 
    
2049
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2050
 
                   proc = None, client_object=None):
2051
 
        # error, or the other end of multiprocessing.Pipe has closed
2052
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2053
 
            # Wait for other process to exit
2054
 
            proc.join()
2055
 
            return False
2056
 
        
2057
 
        # Read a request from the child
2058
 
        request = parent_pipe.recv()
2059
 
        command = request[0]
2060
 
        
2061
 
        if command == 'init':
2062
 
            fpr = request[1]
2063
 
            address = request[2]
2064
 
            
2065
 
            for c in self.clients.itervalues():
2066
 
                if c.fingerprint == fpr:
2067
 
                    client = c
2068
 
                    break
2069
 
            else:
2070
 
                logger.info("Client not found for fingerprint: %s, ad"
2071
 
                            "dress: %s", fpr, address)
2072
 
                if self.use_dbus:
2073
 
                    # Emit D-Bus signal
2074
 
                    mandos_dbus_service.ClientNotFound(fpr,
2075
 
                                                       address[0])
2076
 
                parent_pipe.send(False)
2077
 
                return False
2078
 
            
2079
 
            gobject.io_add_watch(parent_pipe.fileno(),
2080
 
                                 gobject.IO_IN | gobject.IO_HUP,
2081
 
                                 functools.partial(self.handle_ipc,
2082
 
                                                   parent_pipe =
2083
 
                                                   parent_pipe,
2084
 
                                                   proc = proc,
2085
 
                                                   client_object =
2086
 
                                                   client))
2087
 
            parent_pipe.send(True)
2088
 
            # remove the old hook in favor of the new above hook on
2089
 
            # same fileno
2090
 
            return False
2091
 
        if command == 'funcall':
2092
 
            funcname = request[1]
2093
 
            args = request[2]
2094
 
            kwargs = request[3]
2095
 
            
2096
 
            parent_pipe.send(('data', getattr(client_object,
2097
 
                                              funcname)(*args,
2098
 
                                                         **kwargs)))
2099
 
        
2100
 
        if command == 'getattr':
2101
 
            attrname = request[1]
2102
 
            if callable(client_object.__getattribute__(attrname)):
2103
 
                parent_pipe.send(('function',))
2104
 
            else:
2105
 
                parent_pipe.send(('data', client_object
2106
 
                                  .__getattribute__(attrname)))
2107
 
        
2108
 
        if command == 'setattr':
2109
 
            attrname = request[1]
2110
 
            value = request[2]
2111
 
            setattr(client_object, attrname, value)
2112
 
        
2113
 
        return True
2114
 
 
2115
 
 
2116
 
def rfc3339_duration_to_delta(duration):
2117
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2118
 
    
2119
 
    >>> rfc3339_duration_to_delta("P7D")
2120
 
    datetime.timedelta(7)
2121
 
    >>> rfc3339_duration_to_delta("PT60S")
2122
 
    datetime.timedelta(0, 60)
2123
 
    >>> rfc3339_duration_to_delta("PT60M")
2124
 
    datetime.timedelta(0, 3600)
2125
 
    >>> rfc3339_duration_to_delta("PT24H")
2126
 
    datetime.timedelta(1)
2127
 
    >>> rfc3339_duration_to_delta("P1W")
2128
 
    datetime.timedelta(7)
2129
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2130
 
    datetime.timedelta(0, 330)
2131
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2132
 
    datetime.timedelta(1, 200)
2133
 
    """
2134
 
    
2135
 
    # Parsing an RFC 3339 duration with regular expressions is not
2136
 
    # possible - there would have to be multiple places for the same
2137
 
    # values, like seconds.  The current code, while more esoteric, is
2138
 
    # cleaner without depending on a parsing library.  If Python had a
2139
 
    # built-in library for parsing we would use it, but we'd like to
2140
 
    # avoid excessive use of external libraries.
2141
 
    
2142
 
    # New type for defining tokens, syntax, and semantics all-in-one
2143
 
    Token = collections.namedtuple("Token",
2144
 
                                   ("regexp", # To match token; if
2145
 
                                              # "value" is not None,
2146
 
                                              # must have a "group"
2147
 
                                              # containing digits
2148
 
                                    "value",  # datetime.timedelta or
2149
 
                                              # None
2150
 
                                    "followers")) # Tokens valid after
2151
 
                                                  # this token
2152
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2153
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2154
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2155
 
    token_second = Token(re.compile(r"(\d+)S"),
2156
 
                         datetime.timedelta(seconds=1),
2157
 
                         frozenset((token_end,)))
2158
 
    token_minute = Token(re.compile(r"(\d+)M"),
2159
 
                         datetime.timedelta(minutes=1),
2160
 
                         frozenset((token_second, token_end)))
2161
 
    token_hour = Token(re.compile(r"(\d+)H"),
2162
 
                       datetime.timedelta(hours=1),
2163
 
                       frozenset((token_minute, token_end)))
2164
 
    token_time = Token(re.compile(r"T"),
2165
 
                       None,
2166
 
                       frozenset((token_hour, token_minute,
2167
 
                                  token_second)))
2168
 
    token_day = Token(re.compile(r"(\d+)D"),
2169
 
                      datetime.timedelta(days=1),
2170
 
                      frozenset((token_time, token_end)))
2171
 
    token_month = Token(re.compile(r"(\d+)M"),
2172
 
                        datetime.timedelta(weeks=4),
2173
 
                        frozenset((token_day, token_end)))
2174
 
    token_year = Token(re.compile(r"(\d+)Y"),
2175
 
                       datetime.timedelta(weeks=52),
2176
 
                       frozenset((token_month, token_end)))
2177
 
    token_week = Token(re.compile(r"(\d+)W"),
2178
 
                       datetime.timedelta(weeks=1),
2179
 
                       frozenset((token_end,)))
2180
 
    token_duration = Token(re.compile(r"P"), None,
2181
 
                           frozenset((token_year, token_month,
2182
 
                                      token_day, token_time,
2183
 
                                      token_week))),
2184
 
    # Define starting values
2185
 
    value = datetime.timedelta() # Value so far
2186
 
    found_token = None
2187
 
    followers = frozenset(token_duration,) # Following valid tokens
2188
 
    s = duration                # String left to parse
2189
 
    # Loop until end token is found
2190
 
    while found_token is not token_end:
2191
 
        # Search for any currently valid tokens
2192
 
        for token in followers:
2193
 
            match = token.regexp.match(s)
2194
 
            if match is not None:
2195
 
                # Token found
2196
 
                if token.value is not None:
2197
 
                    # Value found, parse digits
2198
 
                    factor = int(match.group(1), 10)
2199
 
                    # Add to value so far
2200
 
                    value += factor * token.value
2201
 
                # Strip token from string
2202
 
                s = token.regexp.sub("", s, 1)
2203
 
                # Go to found token
2204
 
                found_token = token
2205
 
                # Set valid next tokens
2206
 
                followers = found_token.followers
2207
 
                break
2208
 
        else:
2209
 
            # No currently valid tokens were found
2210
 
            raise ValueError("Invalid RFC 3339 duration")
2211
 
    # End token found
2212
 
    return value
2213
 
 
 
112
                        raise error
 
113
            return super(type(self), self).server_bind()
 
114
        attrs["server_bind"] = server_bind
 
115
        def init(self, *args, **kwargs):
 
116
            if "options" in kwargs:
 
117
                self.options = kwargs["options"]
 
118
                del kwargs["options"]
 
119
            if "clients" in kwargs:
 
120
                self.clients = kwargs["clients"]
 
121
                del kwargs["clients"]
 
122
            if "credentials" in kwargs:
 
123
                self.credentials = kwargs["credentials"]
 
124
                del kwargs["credentials"]
 
125
            return super(type(self), self).__init__(*args, **kwargs)
 
126
        attrs["__init__"] = init
 
127
        return type.__new__(cls, name, bases, attrs)
 
128
 
 
129
 
 
130
class udp_handler(SocketServer.DatagramRequestHandler, object):
 
131
    def handle(self):
 
132
        self.wfile.write("Polo")
 
133
        print "UDP request answered"
 
134
 
 
135
 
 
136
class IPv6_UDPServer(SocketServer.UDPServer, object):
 
137
    __metaclass__ = server_metaclass
 
138
    def verify_request(self, request, client_address):
 
139
        print "UDP request came"
 
140
        return request[0] == "Marco"
 
141
 
 
142
 
 
143
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
144
    def handle(self):
 
145
        print "TCP request came"
 
146
        print "Request:", self.request
 
147
        print "Client Address:", self.client_address
 
148
        print "Server:", self.server
 
149
        session = gnutls.connection.ServerSession(self.request,
 
150
                                                  self.server.credentials)
 
151
        session.handshake()
 
152
        if session.peer_certificate:
 
153
            print "DN:", session.peer_certificate.subject
 
154
        try:
 
155
            session.verify_peer()
 
156
        except gnutls.errors.CertificateError, error:
 
157
            print "Verify failed", error
 
158
            session.bye()
 
159
            return
 
160
        try:
 
161
            session.send(dict((client.dn, client.password)
 
162
                              for client in self.server.clients)
 
163
                         [session.peer_certificate.subject])
 
164
        except KeyError:
 
165
            session.send("gazonk")
 
166
            # Log maybe? XXX
 
167
        session.bye()
 
168
 
 
169
 
 
170
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
171
    __metaclass__ = server_metaclass
 
172
    request_queue_size = 1024
 
173
 
 
174
 
 
175
in6addr_any = "::"
2214
176
 
2215
177
def string_to_delta(interval):
2216
178
    """Parse a string and return a datetime.timedelta
2217
 
    
 
179
 
2218
180
    >>> string_to_delta('7d')
2219
181
    datetime.timedelta(7)
2220
182
    >>> string_to_delta('60s')
2223
185
    datetime.timedelta(0, 3600)
2224
186
    >>> string_to_delta('24h')
2225
187
    datetime.timedelta(1)
2226
 
    >>> string_to_delta('1w')
 
188
    >>> string_to_delta(u'1w')
2227
189
    datetime.timedelta(7)
2228
 
    >>> string_to_delta('5m 30s')
2229
 
    datetime.timedelta(0, 330)
2230
190
    """
2231
 
    
2232
191
    try:
2233
 
        return rfc3339_duration_to_delta(interval)
2234
 
    except ValueError:
2235
 
        pass
2236
 
    
2237
 
    timevalue = datetime.timedelta(0)
2238
 
    for s in interval.split():
2239
 
        try:
2240
 
            suffix = unicode(s[-1])
2241
 
            value = int(s[:-1])
2242
 
            if suffix == "d":
2243
 
                delta = datetime.timedelta(value)
2244
 
            elif suffix == "s":
2245
 
                delta = datetime.timedelta(0, value)
2246
 
            elif suffix == "m":
2247
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2248
 
            elif suffix == "h":
2249
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2250
 
            elif suffix == "w":
2251
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2252
 
            else:
2253
 
                raise ValueError("Unknown suffix {0!r}"
2254
 
                                 .format(suffix))
2255
 
        except (ValueError, IndexError) as e:
2256
 
            raise ValueError(*(e.args))
2257
 
        timevalue += delta
2258
 
    return timevalue
2259
 
 
2260
 
 
2261
 
def daemon(nochdir = False, noclose = False):
2262
 
    """See daemon(3).  Standard BSD Unix function.
2263
 
    
2264
 
    This should really exist as os.daemon, but it doesn't (yet)."""
2265
 
    if os.fork():
2266
 
        sys.exit()
2267
 
    os.setsid()
2268
 
    if not nochdir:
2269
 
        os.chdir("/")
2270
 
    if os.fork():
2271
 
        sys.exit()
2272
 
    if not noclose:
2273
 
        # Close all standard open file descriptors
2274
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2275
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2276
 
            raise OSError(errno.ENODEV,
2277
 
                          "{0} not a character device"
2278
 
                          .format(os.devnull))
2279
 
        os.dup2(null, sys.stdin.fileno())
2280
 
        os.dup2(null, sys.stdout.fileno())
2281
 
        os.dup2(null, sys.stderr.fileno())
2282
 
        if null > 2:
2283
 
            os.close(null)
 
192
        suffix=unicode(interval[-1])
 
193
        value=int(interval[:-1])
 
194
        if suffix == u"d":
 
195
            delta = datetime.timedelta(value)
 
196
        elif suffix == u"s":
 
197
            delta = datetime.timedelta(0, value)
 
198
        elif suffix == u"m":
 
199
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
200
        elif suffix == u"h":
 
201
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
202
        elif suffix == u"w":
 
203
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
204
        else:
 
205
            raise ValueError
 
206
    except (ValueError, IndexError):
 
207
        raise ValueError
 
208
    return delta
2284
209
 
2285
210
 
2286
211
def main():
2287
 
    
2288
 
    ##################################################################
2289
 
    # Parsing of options, both command line and config file
2290
 
    
2291
 
    parser = argparse.ArgumentParser()
2292
 
    parser.add_argument("-v", "--version", action="version",
2293
 
                        version = "%(prog)s {0}".format(version),
2294
 
                        help="show version number and exit")
2295
 
    parser.add_argument("-i", "--interface", metavar="IF",
2296
 
                        help="Bind to interface IF")
2297
 
    parser.add_argument("-a", "--address",
2298
 
                        help="Address to listen for requests on")
2299
 
    parser.add_argument("-p", "--port", type=int,
2300
 
                        help="Port number to receive requests on")
2301
 
    parser.add_argument("--check", action="store_true",
2302
 
                        help="Run self-test")
2303
 
    parser.add_argument("--debug", action="store_true",
2304
 
                        help="Debug mode; run in foreground and log"
2305
 
                        " to terminal", default=None)
2306
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2307
 
                        help="Debug level for stdout output")
2308
 
    parser.add_argument("--priority", help="GnuTLS"
2309
 
                        " priority string (see GnuTLS documentation)")
2310
 
    parser.add_argument("--servicename",
2311
 
                        metavar="NAME", help="Zeroconf service name")
2312
 
    parser.add_argument("--configdir",
2313
 
                        default="/etc/mandos", metavar="DIR",
2314
 
                        help="Directory to search for configuration"
2315
 
                        " files")
2316
 
    parser.add_argument("--no-dbus", action="store_false",
2317
 
                        dest="use_dbus", help="Do not provide D-Bus"
2318
 
                        " system bus interface", default=None)
2319
 
    parser.add_argument("--no-ipv6", action="store_false",
2320
 
                        dest="use_ipv6", help="Do not use IPv6",
2321
 
                        default=None)
2322
 
    parser.add_argument("--no-restore", action="store_false",
2323
 
                        dest="restore", help="Do not restore stored"
2324
 
                        " state", default=None)
2325
 
    parser.add_argument("--socket", type=int,
2326
 
                        help="Specify a file descriptor to a network"
2327
 
                        " socket to use instead of creating one")
2328
 
    parser.add_argument("--statedir", metavar="DIR",
2329
 
                        help="Directory to save/restore state in")
2330
 
    parser.add_argument("--foreground", action="store_true",
2331
 
                        help="Run in foreground", default=None)
2332
 
    
2333
 
    options = parser.parse_args()
2334
 
    
 
212
    parser = OptionParser()
 
213
    parser.add_option("-i", "--interface", type="string",
 
214
                      default="eth0", metavar="IF",
 
215
                      help="Interface to bind to")
 
216
    parser.add_option("--cert", type="string", default="cert.pem",
 
217
                      metavar="FILE",
 
218
                      help="Public key certificate to use")
 
219
    parser.add_option("--key", type="string", default="key.pem",
 
220
                      metavar="FILE",
 
221
                      help="Private key to use")
 
222
    parser.add_option("--ca", type="string", default="ca.pem",
 
223
                      metavar="FILE",
 
224
                      help="Certificate Authority certificate to use")
 
225
    parser.add_option("--crl", type="string", default="crl.pem",
 
226
                      metavar="FILE",
 
227
                      help="Certificate Revokation List to use")
 
228
    parser.add_option("-p", "--port", type="int", default=49001,
 
229
                      help="Port number to receive requests on")
 
230
    parser.add_option("--dh", type="int", metavar="BITS",
 
231
                      help="DH group to use")
 
232
    parser.add_option("-t", "--timeout", type="string", # Parsed later
 
233
                      default="15m",
 
234
                      help="Amount of downtime allowed for clients")
 
235
    parser.add_option("--interval", type="string", # Parsed later
 
236
                      default="5m",
 
237
                      help="How often to check that a client is up")
 
238
    parser.add_option("--check", action="store_true", default=False,
 
239
                      help="Run self-test")
 
240
    (options, args) = parser.parse_args()
 
241
 
2335
242
    if options.check:
2336
243
        import doctest
2337
244
        doctest.testmod()
2338
245
        sys.exit()
2339
246
    
2340
 
    # Default values for config file for server-global settings
2341
 
    server_defaults = { "interface": "",
2342
 
                        "address": "",
2343
 
                        "port": "",
2344
 
                        "debug": "False",
2345
 
                        "priority":
2346
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224",
2347
 
                        "servicename": "Mandos",
2348
 
                        "use_dbus": "True",
2349
 
                        "use_ipv6": "True",
2350
 
                        "debuglevel": "",
2351
 
                        "restore": "True",
2352
 
                        "socket": "",
2353
 
                        "statedir": "/var/lib/mandos",
2354
 
                        "foreground": "False",
2355
 
                        }
2356
 
    
2357
 
    # Parse config file for server-global settings
2358
 
    server_config = configparser.SafeConfigParser(server_defaults)
2359
 
    del server_defaults
2360
 
    server_config.read(os.path.join(options.configdir,
2361
 
                                    "mandos.conf"))
2362
 
    # Convert the SafeConfigParser object to a dict
2363
 
    server_settings = server_config.defaults()
2364
 
    # Use the appropriate methods on the non-string config options
2365
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2366
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2367
 
                                                           option)
2368
 
    if server_settings["port"]:
2369
 
        server_settings["port"] = server_config.getint("DEFAULT",
2370
 
                                                       "port")
2371
 
    if server_settings["socket"]:
2372
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2373
 
                                                         "socket")
2374
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2375
 
        # over with an opened os.devnull.  But we don't want this to
2376
 
        # happen with a supplied network socket.
2377
 
        if 0 <= server_settings["socket"] <= 2:
2378
 
            server_settings["socket"] = os.dup(server_settings
2379
 
                                               ["socket"])
2380
 
    del server_config
2381
 
    
2382
 
    # Override the settings from the config file with command line
2383
 
    # options, if set.
2384
 
    for option in ("interface", "address", "port", "debug",
2385
 
                   "priority", "servicename", "configdir",
2386
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2387
 
                   "statedir", "socket", "foreground"):
2388
 
        value = getattr(options, option)
2389
 
        if value is not None:
2390
 
            server_settings[option] = value
2391
 
    del options
2392
 
    # Force all strings to be unicode
2393
 
    for option in server_settings.keys():
2394
 
        if type(server_settings[option]) is str:
2395
 
            server_settings[option] = unicode(server_settings[option])
2396
 
    # Force all boolean options to be boolean
2397
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2398
 
                   "foreground"):
2399
 
        server_settings[option] = bool(server_settings[option])
2400
 
    # Debug implies foreground
2401
 
    if server_settings["debug"]:
2402
 
        server_settings["foreground"] = True
2403
 
    # Now we have our good server settings in "server_settings"
2404
 
    
2405
 
    ##################################################################
2406
 
    
2407
 
    # For convenience
2408
 
    debug = server_settings["debug"]
2409
 
    debuglevel = server_settings["debuglevel"]
2410
 
    use_dbus = server_settings["use_dbus"]
2411
 
    use_ipv6 = server_settings["use_ipv6"]
2412
 
    stored_state_path = os.path.join(server_settings["statedir"],
2413
 
                                     stored_state_file)
2414
 
    foreground = server_settings["foreground"]
2415
 
    
2416
 
    if debug:
2417
 
        initlogger(debug, logging.DEBUG)
2418
 
    else:
2419
 
        if not debuglevel:
2420
 
            initlogger(debug)
2421
 
        else:
2422
 
            level = getattr(logging, debuglevel.upper())
2423
 
            initlogger(debug, level)
2424
 
    
2425
 
    if server_settings["servicename"] != "Mandos":
2426
 
        syslogger.setFormatter(logging.Formatter
2427
 
                               ('Mandos ({0}) [%(process)d]:'
2428
 
                                ' %(levelname)s: %(message)s'
2429
 
                                .format(server_settings
2430
 
                                        ["servicename"])))
2431
 
    
2432
 
    # Parse config file with clients
2433
 
    client_config = configparser.SafeConfigParser(Client
2434
 
                                                  .client_defaults)
2435
 
    client_config.read(os.path.join(server_settings["configdir"],
2436
 
                                    "clients.conf"))
2437
 
    
2438
 
    global mandos_dbus_service
2439
 
    mandos_dbus_service = None
2440
 
    
2441
 
    tcp_server = MandosServer((server_settings["address"],
2442
 
                               server_settings["port"]),
2443
 
                              ClientHandler,
2444
 
                              interface=(server_settings["interface"]
2445
 
                                         or None),
2446
 
                              use_ipv6=use_ipv6,
2447
 
                              gnutls_priority=
2448
 
                              server_settings["priority"],
2449
 
                              use_dbus=use_dbus,
2450
 
                              socketfd=(server_settings["socket"]
2451
 
                                        or None))
2452
 
    if not foreground:
2453
 
        pidfilename = "/run/mandos.pid"
2454
 
        pidfile = None
2455
 
        try:
2456
 
            pidfile = open(pidfilename, "w")
2457
 
        except IOError as e:
2458
 
            logger.error("Could not open file %r", pidfilename,
2459
 
                         exc_info=e)
2460
 
    
2461
 
    for name in ("_mandos", "mandos", "nobody"):
2462
 
        try:
2463
 
            uid = pwd.getpwnam(name).pw_uid
2464
 
            gid = pwd.getpwnam(name).pw_gid
 
247
    # Parse the time arguments
 
248
    try:
 
249
        options.timeout = string_to_delta(options.timeout)
 
250
    except ValueError:
 
251
        parser.error("option --timeout: Unparseable time")
 
252
    
 
253
    try:
 
254
        options.interval = string_to_delta(options.interval)
 
255
    except ValueError:
 
256
        parser.error("option --interval: Unparseable time")
 
257
    
 
258
    cert = gnutls.crypto.X509Certificate(open(options.cert).read())
 
259
    key = gnutls.crypto.X509PrivateKey(open(options.key).read())
 
260
    ca = gnutls.crypto.X509Certificate(open(options.ca).read())
 
261
    crl = gnutls.crypto.X509CRL(open(options.crl).read())
 
262
    cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
 
263
    
 
264
    # Parse config file
 
265
    defaults = {}
 
266
    client_config_object = ConfigParser.SafeConfigParser(defaults)
 
267
    client_config_object.read("mandos-clients.conf")
 
268
    clients = [Client(name=section, options=options,
 
269
                      **(dict(client_config_object.items(section))))
 
270
               for section in client_config_object.sections()]
 
271
    
 
272
    udp_server = IPv6_UDPServer((in6addr_any, options.port),
 
273
                                udp_handler,
 
274
                                options=options)
 
275
    
 
276
    tcp_server = IPv6_TCPServer((in6addr_any, options.port),
 
277
                                tcp_handler,
 
278
                                options=options,
 
279
                                clients=clients,
 
280
                                credentials=cred)
 
281
    
 
282
    while True:
 
283
        try:
 
284
            input, out, err = select.select((udp_server,
 
285
                                             tcp_server), (), ())
 
286
            if not input:
 
287
                pass
 
288
            else:
 
289
                for obj in input:
 
290
                    obj.handle_request()
 
291
        except KeyboardInterrupt:
2465
292
            break
2466
 
        except KeyError:
2467
 
            continue
2468
 
    else:
2469
 
        uid = 65534
2470
 
        gid = 65534
2471
 
    try:
2472
 
        os.setgid(gid)
2473
 
        os.setuid(uid)
2474
 
    except OSError as error:
2475
 
        if error.errno != errno.EPERM:
2476
 
            raise error
2477
 
    
2478
 
    if debug:
2479
 
        # Enable all possible GnuTLS debugging
2480
 
        
2481
 
        # "Use a log level over 10 to enable all debugging options."
2482
 
        # - GnuTLS manual
2483
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2484
 
        
2485
 
        @gnutls.library.types.gnutls_log_func
2486
 
        def debug_gnutls(level, string):
2487
 
            logger.debug("GnuTLS: %s", string[:-1])
2488
 
        
2489
 
        (gnutls.library.functions
2490
 
         .gnutls_global_set_log_function(debug_gnutls))
2491
 
        
2492
 
        # Redirect stdin so all checkers get /dev/null
2493
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2494
 
        os.dup2(null, sys.stdin.fileno())
2495
 
        if null > 2:
2496
 
            os.close(null)
2497
 
    
2498
 
    # Need to fork before connecting to D-Bus
2499
 
    if not foreground:
2500
 
        # Close all input and output, do double fork, etc.
2501
 
        daemon()
2502
 
    
2503
 
    # multiprocessing will use threads, so before we use gobject we
2504
 
    # need to inform gobject that threads will be used.
2505
 
    gobject.threads_init()
2506
 
    
2507
 
    global main_loop
2508
 
    # From the Avahi example code
2509
 
    DBusGMainLoop(set_as_default=True)
2510
 
    main_loop = gobject.MainLoop()
2511
 
    bus = dbus.SystemBus()
2512
 
    # End of Avahi example code
2513
 
    if use_dbus:
2514
 
        try:
2515
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2516
 
                                            bus, do_not_queue=True)
2517
 
            old_bus_name = (dbus.service.BusName
2518
 
                            ("se.bsnet.fukt.Mandos", bus,
2519
 
                             do_not_queue=True))
2520
 
        except dbus.exceptions.NameExistsException as e:
2521
 
            logger.error("Disabling D-Bus:", exc_info=e)
2522
 
            use_dbus = False
2523
 
            server_settings["use_dbus"] = False
2524
 
            tcp_server.use_dbus = False
2525
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2526
 
    service = AvahiServiceToSyslog(name =
2527
 
                                   server_settings["servicename"],
2528
 
                                   servicetype = "_mandos._tcp",
2529
 
                                   protocol = protocol, bus = bus)
2530
 
    if server_settings["interface"]:
2531
 
        service.interface = (if_nametoindex
2532
 
                             (str(server_settings["interface"])))
2533
 
    
2534
 
    global multiprocessing_manager
2535
 
    multiprocessing_manager = multiprocessing.Manager()
2536
 
    
2537
 
    client_class = Client
2538
 
    if use_dbus:
2539
 
        client_class = functools.partial(ClientDBus, bus = bus)
2540
 
    
2541
 
    client_settings = Client.config_parser(client_config)
2542
 
    old_client_settings = {}
2543
 
    clients_data = {}
2544
 
    
2545
 
    # This is used to redirect stdout and stderr for checker processes
2546
 
    global wnull
2547
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2548
 
    # Only used if server is running in foreground but not in debug
2549
 
    # mode
2550
 
    if debug or not foreground:
2551
 
        wnull.close()
2552
 
    
2553
 
    # Get client data and settings from last running state.
2554
 
    if server_settings["restore"]:
2555
 
        try:
2556
 
            with open(stored_state_path, "rb") as stored_state:
2557
 
                clients_data, old_client_settings = (pickle.load
2558
 
                                                     (stored_state))
2559
 
            os.remove(stored_state_path)
2560
 
        except IOError as e:
2561
 
            if e.errno == errno.ENOENT:
2562
 
                logger.warning("Could not load persistent state: {0}"
2563
 
                                .format(os.strerror(e.errno)))
2564
 
            else:
2565
 
                logger.critical("Could not load persistent state:",
2566
 
                                exc_info=e)
2567
 
                raise
2568
 
        except EOFError as e:
2569
 
            logger.warning("Could not load persistent state: "
2570
 
                           "EOFError:", exc_info=e)
2571
 
    
2572
 
    with PGPEngine() as pgp:
2573
 
        for client_name, client in clients_data.iteritems():
2574
 
            # Skip removed clients
2575
 
            if client_name not in client_settings:
2576
 
                continue
2577
 
            
2578
 
            # Decide which value to use after restoring saved state.
2579
 
            # We have three different values: Old config file,
2580
 
            # new config file, and saved state.
2581
 
            # New config value takes precedence if it differs from old
2582
 
            # config value, otherwise use saved state.
2583
 
            for name, value in client_settings[client_name].items():
2584
 
                try:
2585
 
                    # For each value in new config, check if it
2586
 
                    # differs from the old config value (Except for
2587
 
                    # the "secret" attribute)
2588
 
                    if (name != "secret" and
2589
 
                        value != old_client_settings[client_name]
2590
 
                        [name]):
2591
 
                        client[name] = value
2592
 
                except KeyError:
2593
 
                    pass
2594
 
            
2595
 
            # Clients who has passed its expire date can still be
2596
 
            # enabled if its last checker was successful.  Clients
2597
 
            # whose checker succeeded before we stored its state is
2598
 
            # assumed to have successfully run all checkers during
2599
 
            # downtime.
2600
 
            if client["enabled"]:
2601
 
                if datetime.datetime.utcnow() >= client["expires"]:
2602
 
                    if not client["last_checked_ok"]:
2603
 
                        logger.warning(
2604
 
                            "disabling client {0} - Client never "
2605
 
                            "performed a successful checker"
2606
 
                            .format(client_name))
2607
 
                        client["enabled"] = False
2608
 
                    elif client["last_checker_status"] != 0:
2609
 
                        logger.warning(
2610
 
                            "disabling client {0} - Client "
2611
 
                            "last checker failed with error code {1}"
2612
 
                            .format(client_name,
2613
 
                                    client["last_checker_status"]))
2614
 
                        client["enabled"] = False
2615
 
                    else:
2616
 
                        client["expires"] = (datetime.datetime
2617
 
                                             .utcnow()
2618
 
                                             + client["timeout"])
2619
 
                        logger.debug("Last checker succeeded,"
2620
 
                                     " keeping {0} enabled"
2621
 
                                     .format(client_name))
2622
 
            try:
2623
 
                client["secret"] = (
2624
 
                    pgp.decrypt(client["encrypted_secret"],
2625
 
                                client_settings[client_name]
2626
 
                                ["secret"]))
2627
 
            except PGPError:
2628
 
                # If decryption fails, we use secret from new settings
2629
 
                logger.debug("Failed to decrypt {0} old secret"
2630
 
                             .format(client_name))
2631
 
                client["secret"] = (
2632
 
                    client_settings[client_name]["secret"])
2633
 
    
2634
 
    # Add/remove clients based on new changes made to config
2635
 
    for client_name in (set(old_client_settings)
2636
 
                        - set(client_settings)):
2637
 
        del clients_data[client_name]
2638
 
    for client_name in (set(client_settings)
2639
 
                        - set(old_client_settings)):
2640
 
        clients_data[client_name] = client_settings[client_name]
2641
 
    
2642
 
    # Create all client objects
2643
 
    for client_name, client in clients_data.iteritems():
2644
 
        tcp_server.clients[client_name] = client_class(
2645
 
            name = client_name, settings = client,
2646
 
            server_settings = server_settings)
2647
 
    
2648
 
    if not tcp_server.clients:
2649
 
        logger.warning("No clients defined")
2650
 
    
2651
 
    if not foreground:
2652
 
        if pidfile is not None:
2653
 
            try:
2654
 
                with pidfile:
2655
 
                    pid = os.getpid()
2656
 
                    pidfile.write(str(pid) + "\n".encode("utf-8"))
2657
 
            except IOError:
2658
 
                logger.error("Could not write to file %r with PID %d",
2659
 
                             pidfilename, pid)
2660
 
        del pidfile
2661
 
        del pidfilename
2662
 
    
2663
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2664
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2665
 
    
2666
 
    if use_dbus:
2667
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2668
 
                                        "se.bsnet.fukt.Mandos"})
2669
 
        class MandosDBusService(DBusObjectWithProperties):
2670
 
            """A D-Bus proxy object"""
2671
 
            def __init__(self):
2672
 
                dbus.service.Object.__init__(self, bus, "/")
2673
 
            _interface = "se.recompile.Mandos"
2674
 
            
2675
 
            @dbus_interface_annotations(_interface)
2676
 
            def _foo(self):
2677
 
                return { "org.freedesktop.DBus.Property"
2678
 
                         ".EmitsChangedSignal":
2679
 
                             "false"}
2680
 
            
2681
 
            @dbus.service.signal(_interface, signature="o")
2682
 
            def ClientAdded(self, objpath):
2683
 
                "D-Bus signal"
2684
 
                pass
2685
 
            
2686
 
            @dbus.service.signal(_interface, signature="ss")
2687
 
            def ClientNotFound(self, fingerprint, address):
2688
 
                "D-Bus signal"
2689
 
                pass
2690
 
            
2691
 
            @dbus.service.signal(_interface, signature="os")
2692
 
            def ClientRemoved(self, objpath, name):
2693
 
                "D-Bus signal"
2694
 
                pass
2695
 
            
2696
 
            @dbus.service.method(_interface, out_signature="ao")
2697
 
            def GetAllClients(self):
2698
 
                "D-Bus method"
2699
 
                return dbus.Array(c.dbus_object_path
2700
 
                                  for c in
2701
 
                                  tcp_server.clients.itervalues())
2702
 
            
2703
 
            @dbus.service.method(_interface,
2704
 
                                 out_signature="a{oa{sv}}")
2705
 
            def GetAllClientsWithProperties(self):
2706
 
                "D-Bus method"
2707
 
                return dbus.Dictionary(
2708
 
                    ((c.dbus_object_path, c.GetAll(""))
2709
 
                     for c in tcp_server.clients.itervalues()),
2710
 
                    signature="oa{sv}")
2711
 
            
2712
 
            @dbus.service.method(_interface, in_signature="o")
2713
 
            def RemoveClient(self, object_path):
2714
 
                "D-Bus method"
2715
 
                for c in tcp_server.clients.itervalues():
2716
 
                    if c.dbus_object_path == object_path:
2717
 
                        del tcp_server.clients[c.name]
2718
 
                        c.remove_from_connection()
2719
 
                        # Don't signal anything except ClientRemoved
2720
 
                        c.disable(quiet=True)
2721
 
                        # Emit D-Bus signal
2722
 
                        self.ClientRemoved(object_path, c.name)
2723
 
                        return
2724
 
                raise KeyError(object_path)
2725
 
            
2726
 
            del _interface
2727
 
        
2728
 
        mandos_dbus_service = MandosDBusService()
2729
 
    
2730
 
    def cleanup():
2731
 
        "Cleanup function; run on exit"
2732
 
        service.cleanup()
2733
 
        
2734
 
        multiprocessing.active_children()
2735
 
        wnull.close()
2736
 
        if not (tcp_server.clients or client_settings):
2737
 
            return
2738
 
        
2739
 
        # Store client before exiting. Secrets are encrypted with key
2740
 
        # based on what config file has. If config file is
2741
 
        # removed/edited, old secret will thus be unrecovable.
2742
 
        clients = {}
2743
 
        with PGPEngine() as pgp:
2744
 
            for client in tcp_server.clients.itervalues():
2745
 
                key = client_settings[client.name]["secret"]
2746
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2747
 
                                                      key)
2748
 
                client_dict = {}
2749
 
                
2750
 
                # A list of attributes that can not be pickled
2751
 
                # + secret.
2752
 
                exclude = set(("bus", "changedstate", "secret",
2753
 
                               "checker", "server_settings"))
2754
 
                for name, typ in (inspect.getmembers
2755
 
                                  (dbus.service.Object)):
2756
 
                    exclude.add(name)
2757
 
                
2758
 
                client_dict["encrypted_secret"] = (client
2759
 
                                                   .encrypted_secret)
2760
 
                for attr in client.client_structure:
2761
 
                    if attr not in exclude:
2762
 
                        client_dict[attr] = getattr(client, attr)
2763
 
                
2764
 
                clients[client.name] = client_dict
2765
 
                del client_settings[client.name]["secret"]
2766
 
        
2767
 
        try:
2768
 
            with (tempfile.NamedTemporaryFile
2769
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2770
 
                   dir=os.path.dirname(stored_state_path),
2771
 
                   delete=False)) as stored_state:
2772
 
                pickle.dump((clients, client_settings), stored_state)
2773
 
                tempname=stored_state.name
2774
 
            os.rename(tempname, stored_state_path)
2775
 
        except (IOError, OSError) as e:
2776
 
            if not debug:
2777
 
                try:
2778
 
                    os.remove(tempname)
2779
 
                except NameError:
2780
 
                    pass
2781
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2782
 
                logger.warning("Could not save persistent state: {0}"
2783
 
                               .format(os.strerror(e.errno)))
2784
 
            else:
2785
 
                logger.warning("Could not save persistent state:",
2786
 
                               exc_info=e)
2787
 
                raise e
2788
 
        
2789
 
        # Delete all clients, and settings from config
2790
 
        while tcp_server.clients:
2791
 
            name, client = tcp_server.clients.popitem()
2792
 
            if use_dbus:
2793
 
                client.remove_from_connection()
2794
 
            # Don't signal anything except ClientRemoved
2795
 
            client.disable(quiet=True)
2796
 
            if use_dbus:
2797
 
                # Emit D-Bus signal
2798
 
                mandos_dbus_service.ClientRemoved(client
2799
 
                                                  .dbus_object_path,
2800
 
                                                  client.name)
2801
 
        client_settings.clear()
2802
 
    
2803
 
    atexit.register(cleanup)
2804
 
    
2805
 
    for client in tcp_server.clients.itervalues():
2806
 
        if use_dbus:
2807
 
            # Emit D-Bus signal
2808
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2809
 
        # Need to initiate checking of clients
2810
 
        if client.enabled:
2811
 
            client.init_checker()
2812
 
    
2813
 
    tcp_server.enable()
2814
 
    tcp_server.server_activate()
2815
 
    
2816
 
    # Find out what port we got
2817
 
    service.port = tcp_server.socket.getsockname()[1]
2818
 
    if use_ipv6:
2819
 
        logger.info("Now listening on address %r, port %d,"
2820
 
                    " flowinfo %d, scope_id %d",
2821
 
                    *tcp_server.socket.getsockname())
2822
 
    else:                       # IPv4
2823
 
        logger.info("Now listening on address %r, port %d",
2824
 
                    *tcp_server.socket.getsockname())
2825
 
    
2826
 
    #service.interface = tcp_server.socket.getsockname()[3]
2827
 
    
2828
 
    try:
2829
 
        # From the Avahi example code
2830
 
        try:
2831
 
            service.activate()
2832
 
        except dbus.exceptions.DBusException as error:
2833
 
            logger.critical("D-Bus Exception", exc_info=error)
2834
 
            cleanup()
2835
 
            sys.exit(1)
2836
 
        # End of Avahi example code
2837
 
        
2838
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2839
 
                             lambda *args, **kwargs:
2840
 
                             (tcp_server.handle_request
2841
 
                              (*args[2:], **kwargs) or True))
2842
 
        
2843
 
        logger.debug("Starting main loop")
2844
 
        main_loop.run()
2845
 
    except AvahiError as error:
2846
 
        logger.critical("Avahi Error", exc_info=error)
2847
 
        cleanup()
2848
 
        sys.exit(1)
2849
 
    except KeyboardInterrupt:
2850
 
        if debug:
2851
 
            print("", file=sys.stderr)
2852
 
        logger.debug("Server received KeyboardInterrupt")
2853
 
    logger.debug("Server exiting")
2854
 
    # Must run before the D-Bus bus name gets deregistered
2855
 
    cleanup()
2856
 
 
2857
 
if __name__ == '__main__':
 
293
    
 
294
    # Cleanup here
 
295
    for client in clients:
 
296
        client.stop_checker()
 
297
 
 
298
 
 
299
if __name__ == "__main__":
2858
300
    main()
 
301