/mandos/release

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  • Committer: Björn Påhlsson
  • Date: 2008-07-20 02:52:20 UTC
  • Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
       Avahi instead of udp server discovery
       openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server

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Lines of Context:
1
 
#!/usr/bin/python2.7
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
4
 
# Mandos server - give out binary blobs to connecting clients.
5
 
6
 
# This program is partly derived from an example program for an Avahi
7
 
# service publisher, downloaded from
8
 
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
12
 
13
 
# Everything else is
14
 
# Copyright © 2008-2014 Teddy Hogeborn
15
 
# Copyright © 2008-2014 Björn Påhlsson
16
 
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
19
 
# the Free Software Foundation, either version 3 of the License, or
20
 
# (at your option) any later version.
21
 
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
24
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
 
#     GNU General Public License for more details.
26
 
27
 
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
31
 
# Contact the authors at <mandos@recompile.se>.
32
 
33
 
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
from future_builtins import *
38
 
 
39
 
import SocketServer as socketserver
 
1
#!/usr/bin/python
 
2
 
 
3
from __future__ import division
 
4
 
 
5
import SocketServer
40
6
import socket
41
 
import argparse
 
7
import select
 
8
from optparse import OptionParser
42
9
import datetime
43
10
import errno
44
11
import gnutls.crypto
47
14
import gnutls.library.functions
48
15
import gnutls.library.constants
49
16
import gnutls.library.types
50
 
import ConfigParser as configparser
 
17
import ConfigParser
51
18
import sys
52
19
import re
53
20
import os
54
21
import signal
 
22
from sets import Set
55
23
import subprocess
56
 
import atexit
57
 
import stat
58
 
import logging
59
 
import logging.handlers
60
 
import pwd
61
 
import contextlib
62
 
import struct
63
 
import fcntl
64
 
import functools
65
 
import cPickle as pickle
66
 
import multiprocessing
67
 
import types
68
 
import binascii
69
 
import tempfile
70
 
import itertools
71
 
import collections
72
24
 
73
25
import dbus
74
 
import dbus.service
75
26
import gobject
76
27
import avahi
77
28
from dbus.mainloop.glib import DBusGMainLoop
78
29
import ctypes
79
 
import ctypes.util
80
 
import xml.dom.minidom
81
 
import inspect
82
 
 
83
 
try:
84
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
 
except AttributeError:
86
 
    try:
87
 
        from IN import SO_BINDTODEVICE
88
 
    except ImportError:
89
 
        SO_BINDTODEVICE = None
90
 
 
91
 
if sys.version_info.major == 2:
92
 
    str = unicode
93
 
 
94
 
version = "1.6.8"
95
 
stored_state_file = "clients.pickle"
96
 
 
97
 
logger = logging.getLogger()
98
 
syslogger = None
99
 
 
100
 
try:
101
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
102
 
                      (ctypes.util.find_library("c"))
103
 
                      .if_nametoindex)
104
 
except (OSError, AttributeError):
105
 
    def if_nametoindex(interface):
106
 
        "Get an interface index the hard way, i.e. using fcntl()"
107
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
108
 
        with contextlib.closing(socket.socket()) as s:
109
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
 
                                struct.pack(b"16s16x", interface))
111
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
112
 
        return interface_index
113
 
 
114
 
 
115
 
def initlogger(debug, level=logging.WARNING):
116
 
    """init logger and add loglevel"""
117
 
    
118
 
    global syslogger
119
 
    syslogger = (logging.handlers.SysLogHandler
120
 
                 (facility =
121
 
                  logging.handlers.SysLogHandler.LOG_DAEMON,
122
 
                  address = "/dev/log"))
123
 
    syslogger.setFormatter(logging.Formatter
124
 
                           ('Mandos [%(process)d]: %(levelname)s:'
125
 
                            ' %(message)s'))
126
 
    logger.addHandler(syslogger)
127
 
    
128
 
    if debug:
129
 
        console = logging.StreamHandler()
130
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
 
                                               ' [%(process)d]:'
132
 
                                               ' %(levelname)s:'
133
 
                                               ' %(message)s'))
134
 
        logger.addHandler(console)
135
 
    logger.setLevel(level)
136
 
 
137
 
 
138
 
class PGPError(Exception):
139
 
    """Exception if encryption/decryption fails"""
140
 
    pass
141
 
 
142
 
 
143
 
class PGPEngine(object):
144
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
145
 
    def __init__(self):
146
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
 
        self.gnupgargs = ['--batch',
148
 
                          '--home', self.tempdir,
149
 
                          '--force-mdc',
150
 
                          '--quiet',
151
 
                          '--no-use-agent']
152
 
    
153
 
    def __enter__(self):
154
 
        return self
155
 
    
156
 
    def __exit__(self, exc_type, exc_value, traceback):
157
 
        self._cleanup()
158
 
        return False
159
 
    
160
 
    def __del__(self):
161
 
        self._cleanup()
162
 
    
163
 
    def _cleanup(self):
164
 
        if self.tempdir is not None:
165
 
            # Delete contents of tempdir
166
 
            for root, dirs, files in os.walk(self.tempdir,
167
 
                                             topdown = False):
168
 
                for filename in files:
169
 
                    os.remove(os.path.join(root, filename))
170
 
                for dirname in dirs:
171
 
                    os.rmdir(os.path.join(root, dirname))
172
 
            # Remove tempdir
173
 
            os.rmdir(self.tempdir)
174
 
            self.tempdir = None
175
 
    
176
 
    def password_encode(self, password):
177
 
        # Passphrase can not be empty and can not contain newlines or
178
 
        # NUL bytes.  So we prefix it and hex encode it.
179
 
        encoded = b"mandos" + binascii.hexlify(password)
180
 
        if len(encoded) > 2048:
181
 
            # GnuPG can't handle long passwords, so encode differently
182
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
 
                       .replace(b"\n", b"\\n")
184
 
                       .replace(b"\0", b"\\x00"))
185
 
        return encoded
186
 
    
187
 
    def encrypt(self, data, password):
188
 
        passphrase = self.password_encode(password)
189
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
190
 
                                         ) as passfile:
191
 
            passfile.write(passphrase)
192
 
            passfile.flush()
193
 
            proc = subprocess.Popen(['gpg', '--symmetric',
194
 
                                     '--passphrase-file',
195
 
                                     passfile.name]
196
 
                                    + self.gnupgargs,
197
 
                                    stdin = subprocess.PIPE,
198
 
                                    stdout = subprocess.PIPE,
199
 
                                    stderr = subprocess.PIPE)
200
 
            ciphertext, err = proc.communicate(input = data)
201
 
        if proc.returncode != 0:
202
 
            raise PGPError(err)
203
 
        return ciphertext
204
 
    
205
 
    def decrypt(self, data, password):
206
 
        passphrase = self.password_encode(password)
207
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
208
 
                                         ) as passfile:
209
 
            passfile.write(passphrase)
210
 
            passfile.flush()
211
 
            proc = subprocess.Popen(['gpg', '--decrypt',
212
 
                                     '--passphrase-file',
213
 
                                     passfile.name]
214
 
                                    + self.gnupgargs,
215
 
                                    stdin = subprocess.PIPE,
216
 
                                    stdout = subprocess.PIPE,
217
 
                                    stderr = subprocess.PIPE)
218
 
            decrypted_plaintext, err = proc.communicate(input
219
 
                                                        = data)
220
 
        if proc.returncode != 0:
221
 
            raise PGPError(err)
222
 
        return decrypted_plaintext
223
 
 
224
 
 
225
 
class AvahiError(Exception):
226
 
    def __init__(self, value, *args, **kwargs):
227
 
        self.value = value
228
 
        return super(AvahiError, self).__init__(value, *args,
229
 
                                                **kwargs)
230
 
 
231
 
class AvahiServiceError(AvahiError):
232
 
    pass
233
 
 
234
 
class AvahiGroupError(AvahiError):
235
 
    pass
236
 
 
237
 
 
238
 
class AvahiService(object):
239
 
    """An Avahi (Zeroconf) service.
240
 
    
241
 
    Attributes:
242
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
243
 
               Used to optionally bind to the specified interface.
244
 
    name: string; Example: 'Mandos'
245
 
    type: string; Example: '_mandos._tcp'.
246
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
247
 
    port: integer; what port to announce
248
 
    TXT: list of strings; TXT record for the service
249
 
    domain: string; Domain to publish on, default to .local if empty.
250
 
    host: string; Host to publish records for, default is localhost
251
 
    max_renames: integer; maximum number of renames
252
 
    rename_count: integer; counter so we only rename after collisions
253
 
                  a sensible number of times
254
 
    group: D-Bus Entry Group
255
 
    server: D-Bus Server
256
 
    bus: dbus.SystemBus()
257
 
    """
258
 
    
259
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
 
                 servicetype = None, port = None, TXT = None,
261
 
                 domain = "", host = "", max_renames = 32768,
262
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
263
 
        self.interface = interface
264
 
        self.name = name
265
 
        self.type = servicetype
266
 
        self.port = port
267
 
        self.TXT = TXT if TXT is not None else []
268
 
        self.domain = domain
269
 
        self.host = host
270
 
        self.rename_count = 0
271
 
        self.max_renames = max_renames
272
 
        self.protocol = protocol
273
 
        self.group = None       # our entry group
274
 
        self.server = None
275
 
        self.bus = bus
276
 
        self.entry_group_state_changed_match = None
277
 
    
278
 
    def rename(self):
279
 
        """Derived from the Avahi example code"""
280
 
        if self.rename_count >= self.max_renames:
281
 
            logger.critical("No suitable Zeroconf service name found"
282
 
                            " after %i retries, exiting.",
283
 
                            self.rename_count)
284
 
            raise AvahiServiceError("Too many renames")
285
 
        self.name = str(self.server
286
 
                        .GetAlternativeServiceName(self.name))
287
 
        logger.info("Changing Zeroconf service name to %r ...",
288
 
                    self.name)
289
 
        self.remove()
290
 
        try:
291
 
            self.add()
292
 
        except dbus.exceptions.DBusException as error:
293
 
            logger.critical("D-Bus Exception", exc_info=error)
294
 
            self.cleanup()
295
 
            os._exit(1)
296
 
        self.rename_count += 1
297
 
    
298
 
    def remove(self):
299
 
        """Derived from the Avahi example code"""
300
 
        if self.entry_group_state_changed_match is not None:
301
 
            self.entry_group_state_changed_match.remove()
302
 
            self.entry_group_state_changed_match = None
303
 
        if self.group is not None:
304
 
            self.group.Reset()
305
 
    
306
 
    def add(self):
307
 
        """Derived from the Avahi example code"""
308
 
        self.remove()
309
 
        if self.group is None:
310
 
            self.group = dbus.Interface(
311
 
                self.bus.get_object(avahi.DBUS_NAME,
312
 
                                    self.server.EntryGroupNew()),
313
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
 
        self.entry_group_state_changed_match = (
315
 
            self.group.connect_to_signal(
316
 
                'StateChanged', self.entry_group_state_changed))
317
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
 
                     self.name, self.type)
319
 
        self.group.AddService(
320
 
            self.interface,
321
 
            self.protocol,
322
 
            dbus.UInt32(0),     # flags
323
 
            self.name, self.type,
324
 
            self.domain, self.host,
325
 
            dbus.UInt16(self.port),
326
 
            avahi.string_array_to_txt_array(self.TXT))
327
 
        self.group.Commit()
328
 
    
329
 
    def entry_group_state_changed(self, state, error):
330
 
        """Derived from the Avahi example code"""
331
 
        logger.debug("Avahi entry group state change: %i", state)
332
 
        
333
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
334
 
            logger.debug("Zeroconf service established.")
335
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
336
 
            logger.info("Zeroconf service name collision.")
337
 
            self.rename()
338
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
339
 
            logger.critical("Avahi: Error in group state changed %s",
340
 
                            str(error))
341
 
            raise AvahiGroupError("State changed: {!s}"
342
 
                                  .format(error))
343
 
    
344
 
    def cleanup(self):
345
 
        """Derived from the Avahi example code"""
346
 
        if self.group is not None:
347
 
            try:
348
 
                self.group.Free()
349
 
            except (dbus.exceptions.UnknownMethodException,
350
 
                    dbus.exceptions.DBusException):
351
 
                pass
352
 
            self.group = None
353
 
        self.remove()
354
 
    
355
 
    def server_state_changed(self, state, error=None):
356
 
        """Derived from the Avahi example code"""
357
 
        logger.debug("Avahi server state change: %i", state)
358
 
        bad_states = { avahi.SERVER_INVALID:
359
 
                           "Zeroconf server invalid",
360
 
                       avahi.SERVER_REGISTERING: None,
361
 
                       avahi.SERVER_COLLISION:
362
 
                           "Zeroconf server name collision",
363
 
                       avahi.SERVER_FAILURE:
364
 
                           "Zeroconf server failure" }
365
 
        if state in bad_states:
366
 
            if bad_states[state] is not None:
367
 
                if error is None:
368
 
                    logger.error(bad_states[state])
369
 
                else:
370
 
                    logger.error(bad_states[state] + ": %r", error)
371
 
            self.cleanup()
372
 
        elif state == avahi.SERVER_RUNNING:
373
 
            self.add()
374
 
        else:
375
 
            if error is None:
376
 
                logger.debug("Unknown state: %r", state)
377
 
            else:
378
 
                logger.debug("Unknown state: %r: %r", state, error)
379
 
    
380
 
    def activate(self):
381
 
        """Derived from the Avahi example code"""
382
 
        if self.server is None:
383
 
            self.server = dbus.Interface(
384
 
                self.bus.get_object(avahi.DBUS_NAME,
385
 
                                    avahi.DBUS_PATH_SERVER,
386
 
                                    follow_name_owner_changes=True),
387
 
                avahi.DBUS_INTERFACE_SERVER)
388
 
        self.server.connect_to_signal("StateChanged",
389
 
                                 self.server_state_changed)
390
 
        self.server_state_changed(self.server.GetState())
391
 
 
392
 
 
393
 
class AvahiServiceToSyslog(AvahiService):
394
 
    def rename(self):
395
 
        """Add the new name to the syslog messages"""
396
 
        ret = AvahiService.rename(self)
397
 
        syslogger.setFormatter(logging.Formatter
398
 
                               ('Mandos ({}) [%(process)d]:'
399
 
                                ' %(levelname)s: %(message)s'
400
 
                                .format(self.name)))
401
 
        return ret
 
30
 
 
31
import logging
 
32
import logging.handlers
 
33
 
 
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
 
35
 
 
36
logger = logging.Logger('mandos')
 
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
 
38
 
 
39
# This variable is used to optionally bind to a specified interface.
 
40
# It is a global variable to fit in with the other variables from the
 
41
# Avahi server example code.
 
42
serviceInterface = avahi.IF_UNSPEC
 
43
# From the Avahi server example code:
 
44
serviceName = "Mandos"
 
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
 
46
servicePort = None                      # Not known at startup
 
47
serviceTXT = []                         # TXT record for the service
 
48
domain = ""                  # Domain to publish on, default to .local
 
49
host = ""          # Host to publish records for, default to localhost
 
50
group = None #our entry group
 
51
rename_count = 12       # Counter so we only rename after collisions a
 
52
                        # sensible number of times
 
53
# End of Avahi example code
402
54
 
403
55
 
404
56
class Client(object):
405
57
    """A representation of a client host served by this server.
406
 
    
407
58
    Attributes:
408
 
    approved:   bool(); 'None' if not yet approved/disapproved
409
 
    approval_delay: datetime.timedelta(); Time to wait for approval
410
 
    approval_duration: datetime.timedelta(); Duration of one approval
411
 
    checker:    subprocess.Popen(); a running checker process used
412
 
                                    to see if the client lives.
413
 
                                    'None' if no process is running.
414
 
    checker_callback_tag: a gobject event source tag, or None
415
 
    checker_command: string; External command which is run to check
416
 
                     if client lives.  %() expansions are done at
 
59
    name:      string; from the config file, used in log messages
 
60
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
61
                 uniquely identify the client
 
62
    secret:    bytestring; sent verbatim (over TLS) to client
 
63
    fqdn:      string (FQDN); available for use by the checker command
 
64
    created:   datetime.datetime()
 
65
    last_seen: datetime.datetime() or None if not yet seen
 
66
    timeout:   datetime.timedelta(); How long from last_seen until
 
67
                                     this client is invalid
 
68
    interval:  datetime.timedelta(); How often to start a new checker
 
69
    stop_hook: If set, called by stop() as stop_hook(self)
 
70
    checker:   subprocess.Popen(); a running checker process used
 
71
                                   to see if the client lives.
 
72
                                   Is None if no process is running.
 
73
    checker_initiator_tag: a gobject event source tag, or None
 
74
    stop_initiator_tag:    - '' -
 
75
    checker_callback_tag:  - '' -
 
76
    checker_command: string; External command which is run to check if
 
77
                     client lives.  %()s expansions are done at
417
78
                     runtime with vars(self) as dict, so that for
418
79
                     instance %(name)s can be used in the command.
419
 
    checker_initiator_tag: a gobject event source tag, or None
420
 
    created:    datetime.datetime(); (UTC) object creation
421
 
    client_structure: Object describing what attributes a client has
422
 
                      and is used for storing the client at exit
423
 
    current_checker_command: string; current running checker_command
424
 
    disable_initiator_tag: a gobject event source tag, or None
425
 
    enabled:    bool()
426
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
427
 
                 uniquely identify the client
428
 
    host:       string; available for use by the checker command
429
 
    interval:   datetime.timedelta(); How often to start a new checker
430
 
    last_approval_request: datetime.datetime(); (UTC) or None
431
 
    last_checked_ok: datetime.datetime(); (UTC) or None
432
 
    last_checker_status: integer between 0 and 255 reflecting exit
433
 
                         status of last checker. -1 reflects crashed
434
 
                         checker, -2 means no checker completed yet.
435
 
    last_enabled: datetime.datetime(); (UTC) or None
436
 
    name:       string; from the config file, used in log messages and
437
 
                        D-Bus identifiers
438
 
    secret:     bytestring; sent verbatim (over TLS) to client
439
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
440
 
                                      until this client is disabled
441
 
    extended_timeout:   extra long timeout when secret has been sent
442
 
    runtime_expansions: Allowed attributes for runtime expansion.
443
 
    expires:    datetime.datetime(); time (UTC) when a client will be
444
 
                disabled, or None
445
 
    server_settings: The server_settings dict from main()
 
80
    Private attibutes:
 
81
    _timeout: Real variable for 'timeout'
 
82
    _interval: Real variable for 'interval'
 
83
    _timeout_milliseconds: Used by gobject.timeout_add()
 
84
    _interval_milliseconds: - '' -
446
85
    """
447
 
    
448
 
    runtime_expansions = ("approval_delay", "approval_duration",
449
 
                          "created", "enabled", "expires",
450
 
                          "fingerprint", "host", "interval",
451
 
                          "last_approval_request", "last_checked_ok",
452
 
                          "last_enabled", "name", "timeout")
453
 
    client_defaults = { "timeout": "PT5M",
454
 
                        "extended_timeout": "PT15M",
455
 
                        "interval": "PT2M",
456
 
                        "checker": "fping -q -- %%(host)s",
457
 
                        "host": "",
458
 
                        "approval_delay": "PT0S",
459
 
                        "approval_duration": "PT1S",
460
 
                        "approved_by_default": "True",
461
 
                        "enabled": "True",
462
 
                        }
463
 
    
464
 
    @staticmethod
465
 
    def config_parser(config):
466
 
        """Construct a new dict of client settings of this form:
467
 
        { client_name: {setting_name: value, ...}, ...}
468
 
        with exceptions for any special settings as defined above.
469
 
        NOTE: Must be a pure function. Must return the same result
470
 
        value given the same arguments.
471
 
        """
472
 
        settings = {}
473
 
        for client_name in config.sections():
474
 
            section = dict(config.items(client_name))
475
 
            client = settings[client_name] = {}
476
 
            
477
 
            client["host"] = section["host"]
478
 
            # Reformat values from string types to Python types
479
 
            client["approved_by_default"] = config.getboolean(
480
 
                client_name, "approved_by_default")
481
 
            client["enabled"] = config.getboolean(client_name,
482
 
                                                  "enabled")
483
 
            
484
 
            client["fingerprint"] = (section["fingerprint"].upper()
485
 
                                     .replace(" ", ""))
486
 
            if "secret" in section:
487
 
                client["secret"] = section["secret"].decode("base64")
488
 
            elif "secfile" in section:
489
 
                with open(os.path.expanduser(os.path.expandvars
490
 
                                             (section["secfile"])),
491
 
                          "rb") as secfile:
492
 
                    client["secret"] = secfile.read()
493
 
            else:
494
 
                raise TypeError("No secret or secfile for section {}"
495
 
                                .format(section))
496
 
            client["timeout"] = string_to_delta(section["timeout"])
497
 
            client["extended_timeout"] = string_to_delta(
498
 
                section["extended_timeout"])
499
 
            client["interval"] = string_to_delta(section["interval"])
500
 
            client["approval_delay"] = string_to_delta(
501
 
                section["approval_delay"])
502
 
            client["approval_duration"] = string_to_delta(
503
 
                section["approval_duration"])
504
 
            client["checker_command"] = section["checker"]
505
 
            client["last_approval_request"] = None
506
 
            client["last_checked_ok"] = None
507
 
            client["last_checker_status"] = -2
508
 
        
509
 
        return settings
510
 
    
511
 
    def __init__(self, settings, name = None, server_settings=None):
 
86
    def _set_timeout(self, timeout):
 
87
        "Setter function for 'timeout' attribute"
 
88
        self._timeout = timeout
 
89
        self._timeout_milliseconds = ((self.timeout.days
 
90
                                       * 24 * 60 * 60 * 1000)
 
91
                                      + (self.timeout.seconds * 1000)
 
92
                                      + (self.timeout.microseconds
 
93
                                         // 1000))
 
94
    timeout = property(lambda self: self._timeout,
 
95
                       _set_timeout)
 
96
    del _set_timeout
 
97
    def _set_interval(self, interval):
 
98
        "Setter function for 'interval' attribute"
 
99
        self._interval = interval
 
100
        self._interval_milliseconds = ((self.interval.days
 
101
                                        * 24 * 60 * 60 * 1000)
 
102
                                       + (self.interval.seconds
 
103
                                          * 1000)
 
104
                                       + (self.interval.microseconds
 
105
                                          // 1000))
 
106
    interval = property(lambda self: self._interval,
 
107
                        _set_interval)
 
108
    del _set_interval
 
109
    def __init__(self, name=None, options=None, stop_hook=None,
 
110
                 fingerprint=None, secret=None, secfile=None, fqdn=None,
 
111
                 timeout=None, interval=-1, checker=None):
512
112
        self.name = name
513
 
        if server_settings is None:
514
 
            server_settings = {}
515
 
        self.server_settings = server_settings
516
 
        # adding all client settings
517
 
        for setting, value in settings.items():
518
 
            setattr(self, setting, value)
519
 
        
520
 
        if self.enabled:
521
 
            if not hasattr(self, "last_enabled"):
522
 
                self.last_enabled = datetime.datetime.utcnow()
523
 
            if not hasattr(self, "expires"):
524
 
                self.expires = (datetime.datetime.utcnow()
525
 
                                + self.timeout)
526
 
        else:
527
 
            self.last_enabled = None
528
 
            self.expires = None
529
 
        
530
 
        logger.debug("Creating client %r", self.name)
531
 
        # Uppercase and remove spaces from fingerprint for later
532
 
        # comparison purposes with return value from the fingerprint()
533
 
        # function
534
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
535
 
        self.created = settings.get("created",
536
 
                                    datetime.datetime.utcnow())
537
 
        
538
 
        # attributes specific for this server instance
 
113
        # Uppercase and remove spaces from fingerprint
 
114
        # for later comparison purposes with return value of
 
115
        # the fingerprint() function
 
116
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
 
117
        if secret:
 
118
            self.secret = secret.decode(u"base64")
 
119
        elif secfile:
 
120
            sf = open(secfile)
 
121
            self.secret = sf.read()
 
122
            sf.close()
 
123
        else:
 
124
            raise RuntimeError(u"No secret or secfile for client %s"
 
125
                               % self.name)
 
126
        self.fqdn = fqdn                # string
 
127
        self.created = datetime.datetime.now()
 
128
        self.last_seen = None
 
129
        if timeout is None:
 
130
            timeout = options.timeout
 
131
        self.timeout = timeout
 
132
        if interval == -1:
 
133
            interval = options.interval
 
134
        else:
 
135
            interval = string_to_delta(interval)
 
136
        self.interval = interval
 
137
        self.stop_hook = stop_hook
539
138
        self.checker = None
540
139
        self.checker_initiator_tag = None
541
 
        self.disable_initiator_tag = None
 
140
        self.stop_initiator_tag = None
542
141
        self.checker_callback_tag = None
543
 
        self.current_checker_command = None
544
 
        self.approved = None
545
 
        self.approvals_pending = 0
546
 
        self.changedstate = (multiprocessing_manager
547
 
                             .Condition(multiprocessing_manager
548
 
                                        .Lock()))
549
 
        self.client_structure = [attr for attr in
550
 
                                 self.__dict__.iterkeys()
551
 
                                 if not attr.startswith("_")]
552
 
        self.client_structure.append("client_structure")
553
 
        
554
 
        for name, t in inspect.getmembers(type(self),
555
 
                                          lambda obj:
556
 
                                              isinstance(obj,
557
 
                                                         property)):
558
 
            if not name.startswith("_"):
559
 
                self.client_structure.append(name)
560
 
    
561
 
    # Send notice to process children that client state has changed
562
 
    def send_changedstate(self):
563
 
        with self.changedstate:
564
 
            self.changedstate.notify_all()
565
 
    
566
 
    def enable(self):
567
 
        """Start this client's checker and timeout hooks"""
568
 
        if getattr(self, "enabled", False):
569
 
            # Already enabled
570
 
            return
571
 
        self.expires = datetime.datetime.utcnow() + self.timeout
572
 
        self.enabled = True
573
 
        self.last_enabled = datetime.datetime.utcnow()
574
 
        self.init_checker()
575
 
        self.send_changedstate()
576
 
    
577
 
    def disable(self, quiet=True):
578
 
        """Disable this client."""
579
 
        if not getattr(self, "enabled", False):
580
 
            return False
581
 
        if not quiet:
582
 
            logger.info("Disabling client %s", self.name)
583
 
        if getattr(self, "disable_initiator_tag", None) is not None:
584
 
            gobject.source_remove(self.disable_initiator_tag)
585
 
            self.disable_initiator_tag = None
586
 
        self.expires = None
587
 
        if getattr(self, "checker_initiator_tag", None) is not None:
588
 
            gobject.source_remove(self.checker_initiator_tag)
589
 
            self.checker_initiator_tag = None
590
 
        self.stop_checker()
591
 
        self.enabled = False
592
 
        if not quiet:
593
 
            self.send_changedstate()
594
 
        # Do not run this again if called by a gobject.timeout_add
595
 
        return False
596
 
    
597
 
    def __del__(self):
598
 
        self.disable()
599
 
    
600
 
    def init_checker(self):
 
142
        self.check_command = checker
 
143
    def start(self):
 
144
        """Start this clients checker and timeout hooks"""
601
145
        # Schedule a new checker to be started an 'interval' from now,
602
146
        # and every interval from then on.
603
 
        if self.checker_initiator_tag is not None:
604
 
            gobject.source_remove(self.checker_initiator_tag)
605
 
        self.checker_initiator_tag = (gobject.timeout_add
606
 
                                      (int(self.interval
607
 
                                           .total_seconds() * 1000),
608
 
                                       self.start_checker))
609
 
        # Schedule a disable() when 'timeout' has passed
610
 
        if self.disable_initiator_tag is not None:
611
 
            gobject.source_remove(self.disable_initiator_tag)
612
 
        self.disable_initiator_tag = (gobject.timeout_add
613
 
                                      (int(self.timeout
614
 
                                           .total_seconds() * 1000),
615
 
                                       self.disable))
 
147
        self.checker_initiator_tag = gobject.timeout_add\
 
148
                                     (self._interval_milliseconds,
 
149
                                      self.start_checker)
616
150
        # Also start a new checker *right now*.
617
151
        self.start_checker()
618
 
    
619
 
    def checker_callback(self, pid, condition, command):
 
152
        # Schedule a stop() when 'timeout' has passed
 
153
        self.stop_initiator_tag = gobject.timeout_add\
 
154
                                  (self._timeout_milliseconds,
 
155
                                   self.stop)
 
156
    def stop(self):
 
157
        """Stop this client.
 
158
        The possibility that this client might be restarted is left
 
159
        open, but not currently used."""
 
160
        logger.debug(u"Stopping client %s", self.name)
 
161
        self.secret = None
 
162
        if self.stop_initiator_tag:
 
163
            gobject.source_remove(self.stop_initiator_tag)
 
164
            self.stop_initiator_tag = None
 
165
        if self.checker_initiator_tag:
 
166
            gobject.source_remove(self.checker_initiator_tag)
 
167
            self.checker_initiator_tag = None
 
168
        self.stop_checker()
 
169
        if self.stop_hook:
 
170
            self.stop_hook(self)
 
171
        # Do not run this again if called by a gobject.timeout_add
 
172
        return False
 
173
    def __del__(self):
 
174
        # Some code duplication here and in stop()
 
175
        if hasattr(self, "stop_initiator_tag") \
 
176
               and self.stop_initiator_tag:
 
177
            gobject.source_remove(self.stop_initiator_tag)
 
178
            self.stop_initiator_tag = None
 
179
        if hasattr(self, "checker_initiator_tag") \
 
180
               and self.checker_initiator_tag:
 
181
            gobject.source_remove(self.checker_initiator_tag)
 
182
            self.checker_initiator_tag = None
 
183
        self.stop_checker()
 
184
    def checker_callback(self, pid, condition):
620
185
        """The checker has completed, so take appropriate actions."""
621
 
        self.checker_callback_tag = None
622
 
        self.checker = None
623
 
        if os.WIFEXITED(condition):
624
 
            self.last_checker_status = os.WEXITSTATUS(condition)
625
 
            if self.last_checker_status == 0:
626
 
                logger.info("Checker for %(name)s succeeded",
627
 
                            vars(self))
628
 
                self.checked_ok()
629
 
            else:
630
 
                logger.info("Checker for %(name)s failed",
631
 
                            vars(self))
632
 
        else:
633
 
            self.last_checker_status = -1
634
 
            logger.warning("Checker for %(name)s crashed?",
 
186
        now = datetime.datetime.now()
 
187
        if os.WIFEXITED(condition) \
 
188
               and (os.WEXITSTATUS(condition) == 0):
 
189
            logger.debug(u"Checker for %(name)s succeeded",
 
190
                         vars(self))
 
191
            self.last_seen = now
 
192
            gobject.source_remove(self.stop_initiator_tag)
 
193
            self.stop_initiator_tag = gobject.timeout_add\
 
194
                                      (self._timeout_milliseconds,
 
195
                                       self.stop)
 
196
        if not os.WIFEXITED(condition):
 
197
            logger.warning(u"Checker for %(name)s crashed?",
635
198
                           vars(self))
636
 
    
637
 
    def checked_ok(self):
638
 
        """Assert that the client has been seen, alive and well."""
639
 
        self.last_checked_ok = datetime.datetime.utcnow()
640
 
        self.last_checker_status = 0
641
 
        self.bump_timeout()
642
 
    
643
 
    def bump_timeout(self, timeout=None):
644
 
        """Bump up the timeout for this client."""
645
 
        if timeout is None:
646
 
            timeout = self.timeout
647
 
        if self.disable_initiator_tag is not None:
648
 
            gobject.source_remove(self.disable_initiator_tag)
649
 
            self.disable_initiator_tag = None
650
 
        if getattr(self, "enabled", False):
651
 
            self.disable_initiator_tag = (gobject.timeout_add
652
 
                                          (int(timeout.total_seconds()
653
 
                                               * 1000), self.disable))
654
 
            self.expires = datetime.datetime.utcnow() + timeout
655
 
    
656
 
    def need_approval(self):
657
 
        self.last_approval_request = datetime.datetime.utcnow()
658
 
    
 
199
        else:
 
200
            logger.debug(u"Checker for %(name)s failed",
 
201
                         vars(self))
 
202
            self.checker = None
 
203
        self.checker_callback_tag = None
659
204
    def start_checker(self):
660
205
        """Start a new checker subprocess if one is not running.
661
 
        
662
206
        If a checker already exists, leave it running and do
663
207
        nothing."""
664
 
        # The reason for not killing a running checker is that if we
665
 
        # did that, and if a checker (for some reason) started running
666
 
        # slowly and taking more than 'interval' time, then the client
667
 
        # would inevitably timeout, since no checker would get a
668
 
        # chance to run to completion.  If we instead leave running
669
 
        # checkers alone, the checker would have to take more time
670
 
        # than 'timeout' for the client to be disabled, which is as it
671
 
        # should be.
672
 
        
673
 
        # If a checker exists, make sure it is not a zombie
674
 
        try:
675
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
 
        except AttributeError:
677
 
            pass
678
 
        except OSError as error:
679
 
            if error.errno != errno.ECHILD:
680
 
                raise
681
 
        else:
682
 
            if pid:
683
 
                logger.warning("Checker was a zombie")
684
 
                gobject.source_remove(self.checker_callback_tag)
685
 
                self.checker_callback(pid, status,
686
 
                                      self.current_checker_command)
687
 
        # Start a new checker if needed
688
208
        if self.checker is None:
689
 
            # Escape attributes for the shell
690
 
            escaped_attrs = { attr:
691
 
                                  re.escape(str(getattr(self, attr)))
692
 
                              for attr in self.runtime_expansions }
693
 
            try:
694
 
                command = self.checker_command % escaped_attrs
695
 
            except TypeError as error:
696
 
                logger.error('Could not format string "%s"',
697
 
                             self.checker_command, exc_info=error)
698
 
                return True # Try again later
699
 
            self.current_checker_command = command
700
 
            try:
701
 
                logger.info("Starting checker %r for %s",
702
 
                            command, self.name)
703
 
                # We don't need to redirect stdout and stderr, since
704
 
                # in normal mode, that is already done by daemon(),
705
 
                # and in debug mode we don't want to.  (Stdin is
706
 
                # always replaced by /dev/null.)
707
 
                # The exception is when not debugging but nevertheless
708
 
                # running in the foreground; use the previously
709
 
                # created wnull.
710
 
                popen_args = {}
711
 
                if (not self.server_settings["debug"]
712
 
                    and self.server_settings["foreground"]):
713
 
                    popen_args.update({"stdout": wnull,
714
 
                                       "stderr": wnull })
715
 
                self.checker = subprocess.Popen(command,
716
 
                                                close_fds=True,
717
 
                                                shell=True, cwd="/",
718
 
                                                **popen_args)
719
 
            except OSError as error:
720
 
                logger.error("Failed to start subprocess",
721
 
                             exc_info=error)
722
 
                return True
723
 
            self.checker_callback_tag = (gobject.child_watch_add
724
 
                                         (self.checker.pid,
725
 
                                          self.checker_callback,
726
 
                                          data=command))
727
 
            # The checker may have completed before the gobject
728
 
            # watch was added.  Check for this.
729
 
            try:
730
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
 
            except OSError as error:
732
 
                if error.errno == errno.ECHILD:
733
 
                    # This should never happen
734
 
                    logger.error("Child process vanished",
735
 
                                 exc_info=error)
736
 
                    return True
737
 
                raise
738
 
            if pid:
739
 
                gobject.source_remove(self.checker_callback_tag)
740
 
                self.checker_callback(pid, status, command)
 
209
            logger.debug(u"Starting checker for %s",
 
210
                         self.name)
 
211
            try:
 
212
                command = self.check_command % self.fqdn
 
213
            except TypeError:
 
214
                escaped_attrs = dict((key, re.escape(str(val)))
 
215
                                     for key, val in
 
216
                                     vars(self).iteritems())
 
217
                try:
 
218
                    command = self.check_command % escaped_attrs
 
219
                except TypeError, error:
 
220
                    logger.critical(u'Could not format string "%s": %s',
 
221
                                    self.check_command, error)
 
222
                    return True # Try again later
 
223
            try:
 
224
                self.checker = subprocess.\
 
225
                               Popen(command,
 
226
                                     stdout=subprocess.PIPE,
 
227
                                     close_fds=True, shell=True,
 
228
                                     cwd="/")
 
229
                self.checker_callback_tag = gobject.\
 
230
                                            child_watch_add(self.checker.pid,
 
231
                                                            self.\
 
232
                                                            checker_callback)
 
233
            except subprocess.OSError, error:
 
234
                logger.error(u"Failed to start subprocess: %s",
 
235
                             error)
741
236
        # Re-run this periodically if run by gobject.timeout_add
742
237
        return True
743
 
    
744
238
    def stop_checker(self):
745
239
        """Force the checker process, if any, to stop."""
746
 
        if self.checker_callback_tag:
747
 
            gobject.source_remove(self.checker_callback_tag)
748
 
            self.checker_callback_tag = None
749
 
        if getattr(self, "checker", None) is None:
 
240
        if not hasattr(self, "checker") or self.checker is None:
750
241
            return
751
 
        logger.debug("Stopping checker for %(name)s", vars(self))
752
 
        try:
753
 
            self.checker.terminate()
754
 
            #time.sleep(0.5)
755
 
            #if self.checker.poll() is None:
756
 
            #    self.checker.kill()
757
 
        except OSError as error:
758
 
            if error.errno != errno.ESRCH: # No such process
759
 
                raise
760
 
        self.checker = None
761
 
 
762
 
 
763
 
def dbus_service_property(dbus_interface, signature="v",
764
 
                          access="readwrite", byte_arrays=False):
765
 
    """Decorators for marking methods of a DBusObjectWithProperties to
766
 
    become properties on the D-Bus.
767
 
    
768
 
    The decorated method will be called with no arguments by "Get"
769
 
    and with one argument by "Set".
770
 
    
771
 
    The parameters, where they are supported, are the same as
772
 
    dbus.service.method, except there is only "signature", since the
773
 
    type from Get() and the type sent to Set() is the same.
774
 
    """
775
 
    # Encoding deeply encoded byte arrays is not supported yet by the
776
 
    # "Set" method, so we fail early here:
777
 
    if byte_arrays and signature != "ay":
778
 
        raise ValueError("Byte arrays not supported for non-'ay'"
779
 
                         " signature {!r}".format(signature))
780
 
    def decorator(func):
781
 
        func._dbus_is_property = True
782
 
        func._dbus_interface = dbus_interface
783
 
        func._dbus_signature = signature
784
 
        func._dbus_access = access
785
 
        func._dbus_name = func.__name__
786
 
        if func._dbus_name.endswith("_dbus_property"):
787
 
            func._dbus_name = func._dbus_name[:-14]
788
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
789
 
        return func
790
 
    return decorator
791
 
 
792
 
 
793
 
def dbus_interface_annotations(dbus_interface):
794
 
    """Decorator for marking functions returning interface annotations
795
 
    
796
 
    Usage:
797
 
    
798
 
    @dbus_interface_annotations("org.example.Interface")
799
 
    def _foo(self):  # Function name does not matter
800
 
        return {"org.freedesktop.DBus.Deprecated": "true",
801
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
802
 
                    "false"}
803
 
    """
804
 
    def decorator(func):
805
 
        func._dbus_is_interface = True
806
 
        func._dbus_interface = dbus_interface
807
 
        func._dbus_name = dbus_interface
808
 
        return func
809
 
    return decorator
810
 
 
811
 
 
812
 
def dbus_annotations(annotations):
813
 
    """Decorator to annotate D-Bus methods, signals or properties
814
 
    Usage:
815
 
    
816
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
817
 
                       "org.freedesktop.DBus.Property."
818
 
                       "EmitsChangedSignal": "false"})
819
 
    @dbus_service_property("org.example.Interface", signature="b",
820
 
                           access="r")
821
 
    def Property_dbus_property(self):
822
 
        return dbus.Boolean(False)
823
 
    """
824
 
    def decorator(func):
825
 
        func._dbus_annotations = annotations
826
 
        return func
827
 
    return decorator
828
 
 
829
 
 
830
 
class DBusPropertyException(dbus.exceptions.DBusException):
831
 
    """A base class for D-Bus property-related exceptions
832
 
    """
833
 
    pass
834
 
 
835
 
class DBusPropertyAccessException(DBusPropertyException):
836
 
    """A property's access permissions disallows an operation.
837
 
    """
838
 
    pass
839
 
 
840
 
 
841
 
class DBusPropertyNotFound(DBusPropertyException):
842
 
    """An attempt was made to access a non-existing property.
843
 
    """
844
 
    pass
845
 
 
846
 
 
847
 
class DBusObjectWithProperties(dbus.service.Object):
848
 
    """A D-Bus object with properties.
849
 
    
850
 
    Classes inheriting from this can use the dbus_service_property
851
 
    decorator to expose methods as D-Bus properties.  It exposes the
852
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
853
 
    """
854
 
    
855
 
    @staticmethod
856
 
    def _is_dbus_thing(thing):
857
 
        """Returns a function testing if an attribute is a D-Bus thing
858
 
        
859
 
        If called like _is_dbus_thing("method") it returns a function
860
 
        suitable for use as predicate to inspect.getmembers().
861
 
        """
862
 
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
 
                                   False)
864
 
    
865
 
    def _get_all_dbus_things(self, thing):
866
 
        """Returns a generator of (name, attribute) pairs
867
 
        """
868
 
        return ((getattr(athing.__get__(self), "_dbus_name",
869
 
                         name),
870
 
                 athing.__get__(self))
871
 
                for cls in self.__class__.__mro__
872
 
                for name, athing in
873
 
                inspect.getmembers(cls,
874
 
                                   self._is_dbus_thing(thing)))
875
 
    
876
 
    def _get_dbus_property(self, interface_name, property_name):
877
 
        """Returns a bound method if one exists which is a D-Bus
878
 
        property with the specified name and interface.
879
 
        """
880
 
        for cls in  self.__class__.__mro__:
881
 
            for name, value in (inspect.getmembers
882
 
                                (cls,
883
 
                                 self._is_dbus_thing("property"))):
884
 
                if (value._dbus_name == property_name
885
 
                    and value._dbus_interface == interface_name):
886
 
                    return value.__get__(self)
887
 
        
888
 
        # No such property
889
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
 
                                   + interface_name + "."
891
 
                                   + property_name)
892
 
    
893
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
894
 
                         out_signature="v")
895
 
    def Get(self, interface_name, property_name):
896
 
        """Standard D-Bus property Get() method, see D-Bus standard.
897
 
        """
898
 
        prop = self._get_dbus_property(interface_name, property_name)
899
 
        if prop._dbus_access == "write":
900
 
            raise DBusPropertyAccessException(property_name)
901
 
        value = prop()
902
 
        if not hasattr(value, "variant_level"):
903
 
            return value
904
 
        return type(value)(value, variant_level=value.variant_level+1)
905
 
    
906
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
907
 
    def Set(self, interface_name, property_name, value):
908
 
        """Standard D-Bus property Set() method, see D-Bus standard.
909
 
        """
910
 
        prop = self._get_dbus_property(interface_name, property_name)
911
 
        if prop._dbus_access == "read":
912
 
            raise DBusPropertyAccessException(property_name)
913
 
        if prop._dbus_get_args_options["byte_arrays"]:
914
 
            # The byte_arrays option is not supported yet on
915
 
            # signatures other than "ay".
916
 
            if prop._dbus_signature != "ay":
917
 
                raise ValueError("Byte arrays not supported for non-"
918
 
                                 "'ay' signature {!r}"
919
 
                                 .format(prop._dbus_signature))
920
 
            value = dbus.ByteArray(b''.join(chr(byte)
921
 
                                            for byte in value))
922
 
        prop(value)
923
 
    
924
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
925
 
                         out_signature="a{sv}")
926
 
    def GetAll(self, interface_name):
927
 
        """Standard D-Bus property GetAll() method, see D-Bus
928
 
        standard.
929
 
        
930
 
        Note: Will not include properties with access="write".
931
 
        """
932
 
        properties = {}
933
 
        for name, prop in self._get_all_dbus_things("property"):
934
 
            if (interface_name
935
 
                and interface_name != prop._dbus_interface):
936
 
                # Interface non-empty but did not match
937
 
                continue
938
 
            # Ignore write-only properties
939
 
            if prop._dbus_access == "write":
940
 
                continue
941
 
            value = prop()
942
 
            if not hasattr(value, "variant_level"):
943
 
                properties[name] = value
944
 
                continue
945
 
            properties[name] = type(value)(value, variant_level=
946
 
                                           value.variant_level+1)
947
 
        return dbus.Dictionary(properties, signature="sv")
948
 
    
949
 
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
950
 
    def PropertiesChanged(self, interface_name, changed_properties,
951
 
                          invalidated_properties):
952
 
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
953
 
        standard.
954
 
        """
955
 
        pass
956
 
    
957
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
958
 
                         out_signature="s",
959
 
                         path_keyword='object_path',
960
 
                         connection_keyword='connection')
961
 
    def Introspect(self, object_path, connection):
962
 
        """Overloading of standard D-Bus method.
963
 
        
964
 
        Inserts property tags and interface annotation tags.
965
 
        """
966
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
967
 
                                                   connection)
968
 
        try:
969
 
            document = xml.dom.minidom.parseString(xmlstring)
970
 
            def make_tag(document, name, prop):
971
 
                e = document.createElement("property")
972
 
                e.setAttribute("name", name)
973
 
                e.setAttribute("type", prop._dbus_signature)
974
 
                e.setAttribute("access", prop._dbus_access)
975
 
                return e
976
 
            for if_tag in document.getElementsByTagName("interface"):
977
 
                # Add property tags
978
 
                for tag in (make_tag(document, name, prop)
979
 
                            for name, prop
980
 
                            in self._get_all_dbus_things("property")
981
 
                            if prop._dbus_interface
982
 
                            == if_tag.getAttribute("name")):
983
 
                    if_tag.appendChild(tag)
984
 
                # Add annotation tags
985
 
                for typ in ("method", "signal", "property"):
986
 
                    for tag in if_tag.getElementsByTagName(typ):
987
 
                        annots = dict()
988
 
                        for name, prop in (self.
989
 
                                           _get_all_dbus_things(typ)):
990
 
                            if (name == tag.getAttribute("name")
991
 
                                and prop._dbus_interface
992
 
                                == if_tag.getAttribute("name")):
993
 
                                annots.update(getattr
994
 
                                              (prop,
995
 
                                               "_dbus_annotations",
996
 
                                               {}))
997
 
                        for name, value in annots.items():
998
 
                            ann_tag = document.createElement(
999
 
                                "annotation")
1000
 
                            ann_tag.setAttribute("name", name)
1001
 
                            ann_tag.setAttribute("value", value)
1002
 
                            tag.appendChild(ann_tag)
1003
 
                # Add interface annotation tags
1004
 
                for annotation, value in dict(
1005
 
                    itertools.chain.from_iterable(
1006
 
                        annotations().items()
1007
 
                        for name, annotations in
1008
 
                        self._get_all_dbus_things("interface")
1009
 
                        if name == if_tag.getAttribute("name")
1010
 
                        )).items():
1011
 
                    ann_tag = document.createElement("annotation")
1012
 
                    ann_tag.setAttribute("name", annotation)
1013
 
                    ann_tag.setAttribute("value", value)
1014
 
                    if_tag.appendChild(ann_tag)
1015
 
                # Add the names to the return values for the
1016
 
                # "org.freedesktop.DBus.Properties" methods
1017
 
                if (if_tag.getAttribute("name")
1018
 
                    == "org.freedesktop.DBus.Properties"):
1019
 
                    for cn in if_tag.getElementsByTagName("method"):
1020
 
                        if cn.getAttribute("name") == "Get":
1021
 
                            for arg in cn.getElementsByTagName("arg"):
1022
 
                                if (arg.getAttribute("direction")
1023
 
                                    == "out"):
1024
 
                                    arg.setAttribute("name", "value")
1025
 
                        elif cn.getAttribute("name") == "GetAll":
1026
 
                            for arg in cn.getElementsByTagName("arg"):
1027
 
                                if (arg.getAttribute("direction")
1028
 
                                    == "out"):
1029
 
                                    arg.setAttribute("name", "props")
1030
 
            xmlstring = document.toxml("utf-8")
1031
 
            document.unlink()
1032
 
        except (AttributeError, xml.dom.DOMException,
1033
 
                xml.parsers.expat.ExpatError) as error:
1034
 
            logger.error("Failed to override Introspection method",
1035
 
                         exc_info=error)
1036
 
        return xmlstring
1037
 
 
1038
 
 
1039
 
def datetime_to_dbus(dt, variant_level=0):
1040
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1041
 
    if dt is None:
1042
 
        return dbus.String("", variant_level = variant_level)
1043
 
    return dbus.String(dt.isoformat(),
1044
 
                       variant_level=variant_level)
1045
 
 
1046
 
 
1047
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1048
 
    """A class decorator; applied to a subclass of
1049
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1050
 
    interface names according to the "alt_interface_names" mapping.
1051
 
    Usage:
1052
 
    
1053
 
    @alternate_dbus_interfaces({"org.example.Interface":
1054
 
                                    "net.example.AlternateInterface"})
1055
 
    class SampleDBusObject(dbus.service.Object):
1056
 
        @dbus.service.method("org.example.Interface")
1057
 
        def SampleDBusMethod():
1058
 
            pass
1059
 
    
1060
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1061
 
    reachable via two interfaces: "org.example.Interface" and
1062
 
    "net.example.AlternateInterface", the latter of which will have
1063
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1064
 
    "true", unless "deprecate" is passed with a False value.
1065
 
    
1066
 
    This works for methods and signals, and also for D-Bus properties
1067
 
    (from DBusObjectWithProperties) and interfaces (from the
1068
 
    dbus_interface_annotations decorator).
1069
 
    """
1070
 
    def wrapper(cls):
1071
 
        for orig_interface_name, alt_interface_name in (
1072
 
            alt_interface_names.items()):
1073
 
            attr = {}
1074
 
            interface_names = set()
1075
 
            # Go though all attributes of the class
1076
 
            for attrname, attribute in inspect.getmembers(cls):
1077
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1078
 
                # with the wrong interface name
1079
 
                if (not hasattr(attribute, "_dbus_interface")
1080
 
                    or not attribute._dbus_interface
1081
 
                    .startswith(orig_interface_name)):
1082
 
                    continue
1083
 
                # Create an alternate D-Bus interface name based on
1084
 
                # the current name
1085
 
                alt_interface = (attribute._dbus_interface
1086
 
                                 .replace(orig_interface_name,
1087
 
                                          alt_interface_name))
1088
 
                interface_names.add(alt_interface)
1089
 
                # Is this a D-Bus signal?
1090
 
                if getattr(attribute, "_dbus_is_signal", False):
1091
 
                    # Extract the original non-method undecorated
1092
 
                    # function by black magic
1093
 
                    nonmethod_func = (dict(
1094
 
                            zip(attribute.func_code.co_freevars,
1095
 
                                attribute.__closure__))["func"]
1096
 
                                      .cell_contents)
1097
 
                    # Create a new, but exactly alike, function
1098
 
                    # object, and decorate it to be a new D-Bus signal
1099
 
                    # with the alternate D-Bus interface name
1100
 
                    new_function = (dbus.service.signal
1101
 
                                    (alt_interface,
1102
 
                                     attribute._dbus_signature)
1103
 
                                    (types.FunctionType(
1104
 
                                nonmethod_func.func_code,
1105
 
                                nonmethod_func.func_globals,
1106
 
                                nonmethod_func.func_name,
1107
 
                                nonmethod_func.func_defaults,
1108
 
                                nonmethod_func.func_closure)))
1109
 
                    # Copy annotations, if any
1110
 
                    try:
1111
 
                        new_function._dbus_annotations = (
1112
 
                            dict(attribute._dbus_annotations))
1113
 
                    except AttributeError:
1114
 
                        pass
1115
 
                    # Define a creator of a function to call both the
1116
 
                    # original and alternate functions, so both the
1117
 
                    # original and alternate signals gets sent when
1118
 
                    # the function is called
1119
 
                    def fixscope(func1, func2):
1120
 
                        """This function is a scope container to pass
1121
 
                        func1 and func2 to the "call_both" function
1122
 
                        outside of its arguments"""
1123
 
                        def call_both(*args, **kwargs):
1124
 
                            """This function will emit two D-Bus
1125
 
                            signals by calling func1 and func2"""
1126
 
                            func1(*args, **kwargs)
1127
 
                            func2(*args, **kwargs)
1128
 
                        return call_both
1129
 
                    # Create the "call_both" function and add it to
1130
 
                    # the class
1131
 
                    attr[attrname] = fixscope(attribute, new_function)
1132
 
                # Is this a D-Bus method?
1133
 
                elif getattr(attribute, "_dbus_is_method", False):
1134
 
                    # Create a new, but exactly alike, function
1135
 
                    # object.  Decorate it to be a new D-Bus method
1136
 
                    # with the alternate D-Bus interface name.  Add it
1137
 
                    # to the class.
1138
 
                    attr[attrname] = (dbus.service.method
1139
 
                                      (alt_interface,
1140
 
                                       attribute._dbus_in_signature,
1141
 
                                       attribute._dbus_out_signature)
1142
 
                                      (types.FunctionType
1143
 
                                       (attribute.func_code,
1144
 
                                        attribute.func_globals,
1145
 
                                        attribute.func_name,
1146
 
                                        attribute.func_defaults,
1147
 
                                        attribute.func_closure)))
1148
 
                    # Copy annotations, if any
1149
 
                    try:
1150
 
                        attr[attrname]._dbus_annotations = (
1151
 
                            dict(attribute._dbus_annotations))
1152
 
                    except AttributeError:
1153
 
                        pass
1154
 
                # Is this a D-Bus property?
1155
 
                elif getattr(attribute, "_dbus_is_property", False):
1156
 
                    # Create a new, but exactly alike, function
1157
 
                    # object, and decorate it to be a new D-Bus
1158
 
                    # property with the alternate D-Bus interface
1159
 
                    # name.  Add it to the class.
1160
 
                    attr[attrname] = (dbus_service_property
1161
 
                                      (alt_interface,
1162
 
                                       attribute._dbus_signature,
1163
 
                                       attribute._dbus_access,
1164
 
                                       attribute
1165
 
                                       ._dbus_get_args_options
1166
 
                                       ["byte_arrays"])
1167
 
                                      (types.FunctionType
1168
 
                                       (attribute.func_code,
1169
 
                                        attribute.func_globals,
1170
 
                                        attribute.func_name,
1171
 
                                        attribute.func_defaults,
1172
 
                                        attribute.func_closure)))
1173
 
                    # Copy annotations, if any
1174
 
                    try:
1175
 
                        attr[attrname]._dbus_annotations = (
1176
 
                            dict(attribute._dbus_annotations))
1177
 
                    except AttributeError:
1178
 
                        pass
1179
 
                # Is this a D-Bus interface?
1180
 
                elif getattr(attribute, "_dbus_is_interface", False):
1181
 
                    # Create a new, but exactly alike, function
1182
 
                    # object.  Decorate it to be a new D-Bus interface
1183
 
                    # with the alternate D-Bus interface name.  Add it
1184
 
                    # to the class.
1185
 
                    attr[attrname] = (dbus_interface_annotations
1186
 
                                      (alt_interface)
1187
 
                                      (types.FunctionType
1188
 
                                       (attribute.func_code,
1189
 
                                        attribute.func_globals,
1190
 
                                        attribute.func_name,
1191
 
                                        attribute.func_defaults,
1192
 
                                        attribute.func_closure)))
1193
 
            if deprecate:
1194
 
                # Deprecate all alternate interfaces
1195
 
                iname="_AlternateDBusNames_interface_annotation{}"
1196
 
                for interface_name in interface_names:
1197
 
                    @dbus_interface_annotations(interface_name)
1198
 
                    def func(self):
1199
 
                        return { "org.freedesktop.DBus.Deprecated":
1200
 
                                     "true" }
1201
 
                    # Find an unused name
1202
 
                    for aname in (iname.format(i)
1203
 
                                  for i in itertools.count()):
1204
 
                        if aname not in attr:
1205
 
                            attr[aname] = func
1206
 
                            break
1207
 
            if interface_names:
1208
 
                # Replace the class with a new subclass of it with
1209
 
                # methods, signals, etc. as created above.
1210
 
                cls = type(b"{}Alternate".format(cls.__name__),
1211
 
                           (cls,), attr)
1212
 
        return cls
1213
 
    return wrapper
1214
 
 
1215
 
 
1216
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1217
 
                                "se.bsnet.fukt.Mandos"})
1218
 
class ClientDBus(Client, DBusObjectWithProperties):
1219
 
    """A Client class using D-Bus
1220
 
    
1221
 
    Attributes:
1222
 
    dbus_object_path: dbus.ObjectPath
1223
 
    bus: dbus.SystemBus()
1224
 
    """
1225
 
    
1226
 
    runtime_expansions = (Client.runtime_expansions
1227
 
                          + ("dbus_object_path",))
1228
 
    
1229
 
    _interface = "se.recompile.Mandos.Client"
1230
 
    
1231
 
    # dbus.service.Object doesn't use super(), so we can't either.
1232
 
    
1233
 
    def __init__(self, bus = None, *args, **kwargs):
1234
 
        self.bus = bus
1235
 
        Client.__init__(self, *args, **kwargs)
1236
 
        # Only now, when this client is initialized, can it show up on
1237
 
        # the D-Bus
1238
 
        client_object_name = str(self.name).translate(
1239
 
            {ord("."): ord("_"),
1240
 
             ord("-"): ord("_")})
1241
 
        self.dbus_object_path = (dbus.ObjectPath
1242
 
                                 ("/clients/" + client_object_name))
1243
 
        DBusObjectWithProperties.__init__(self, self.bus,
1244
 
                                          self.dbus_object_path)
1245
 
    
1246
 
    def notifychangeproperty(transform_func,
1247
 
                             dbus_name, type_func=lambda x: x,
1248
 
                             variant_level=1, invalidate_only=False,
1249
 
                             _interface=_interface):
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 = "_{}".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
 
                    if invalidate_only:
1267
 
                        self.PropertiesChanged(_interface,
1268
 
                                               dbus.Dictionary(),
1269
 
                                               dbus.Array
1270
 
                                               ((dbus_name,)))
1271
 
                    else:
1272
 
                        dbus_value = transform_func(type_func(value),
1273
 
                                                    variant_level
1274
 
                                                    =variant_level)
1275
 
                        self.PropertyChanged(dbus.String(dbus_name),
1276
 
                                             dbus_value)
1277
 
                        self.PropertiesChanged(_interface,
1278
 
                                               dbus.Dictionary({
1279
 
                                    dbus.String(dbus_name):
1280
 
                                        dbus_value }), dbus.Array())
1281
 
            setattr(self, attrname, value)
1282
 
        
1283
 
        return property(lambda self: getattr(self, attrname), setter)
1284
 
    
1285
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1286
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1287
 
                                             "ApprovalPending",
1288
 
                                             type_func = bool)
1289
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1290
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1291
 
                                        "LastEnabled")
1292
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1293
 
                                   type_func = lambda checker:
1294
 
                                       checker is not None)
1295
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1296
 
                                           "LastCheckedOK")
1297
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1298
 
                                               "LastCheckerStatus")
1299
 
    last_approval_request = notifychangeproperty(
1300
 
        datetime_to_dbus, "LastApprovalRequest")
1301
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1302
 
                                               "ApprovedByDefault")
1303
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1304
 
                                          "ApprovalDelay",
1305
 
                                          type_func =
1306
 
                                          lambda td: td.total_seconds()
1307
 
                                          * 1000)
1308
 
    approval_duration = notifychangeproperty(
1309
 
        dbus.UInt64, "ApprovalDuration",
1310
 
        type_func = lambda td: td.total_seconds() * 1000)
1311
 
    host = notifychangeproperty(dbus.String, "Host")
1312
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
 
                                   type_func = lambda td:
1314
 
                                       td.total_seconds() * 1000)
1315
 
    extended_timeout = notifychangeproperty(
1316
 
        dbus.UInt64, "ExtendedTimeout",
1317
 
        type_func = lambda td: td.total_seconds() * 1000)
1318
 
    interval = notifychangeproperty(dbus.UInt64,
1319
 
                                    "Interval",
1320
 
                                    type_func =
1321
 
                                    lambda td: td.total_seconds()
1322
 
                                    * 1000)
1323
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1324
 
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
1325
 
                                  invalidate_only=True)
1326
 
    
1327
 
    del notifychangeproperty
1328
 
    
1329
 
    def __del__(self, *args, **kwargs):
1330
 
        try:
1331
 
            self.remove_from_connection()
1332
 
        except LookupError:
1333
 
            pass
1334
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1335
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1336
 
        Client.__del__(self, *args, **kwargs)
1337
 
    
1338
 
    def checker_callback(self, pid, condition, command,
1339
 
                         *args, **kwargs):
 
242
        gobject.source_remove(self.checker_callback_tag)
1340
243
        self.checker_callback_tag = None
 
244
        os.kill(self.checker.pid, signal.SIGTERM)
 
245
        if self.checker.poll() is None:
 
246
            os.kill(self.checker.pid, signal.SIGKILL)
1341
247
        self.checker = None
1342
 
        if os.WIFEXITED(condition):
1343
 
            exitstatus = os.WEXITSTATUS(condition)
1344
 
            # Emit D-Bus signal
1345
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1346
 
                                  dbus.Int64(condition),
1347
 
                                  dbus.String(command))
1348
 
        else:
1349
 
            # Emit D-Bus signal
1350
 
            self.CheckerCompleted(dbus.Int16(-1),
1351
 
                                  dbus.Int64(condition),
1352
 
                                  dbus.String(command))
1353
 
        
1354
 
        return Client.checker_callback(self, pid, condition, command,
1355
 
                                       *args, **kwargs)
1356
 
    
1357
 
    def start_checker(self, *args, **kwargs):
1358
 
        old_checker_pid = getattr(self.checker, "pid", None)
1359
 
        r = Client.start_checker(self, *args, **kwargs)
1360
 
        # Only if new checker process was started
1361
 
        if (self.checker is not None
1362
 
            and old_checker_pid != self.checker.pid):
1363
 
            # Emit D-Bus signal
1364
 
            self.CheckerStarted(self.current_checker_command)
1365
 
        return r
1366
 
    
1367
 
    def _reset_approved(self):
1368
 
        self.approved = None
1369
 
        return False
1370
 
    
1371
 
    def approve(self, value=True):
1372
 
        self.approved = value
1373
 
        gobject.timeout_add(int(self.approval_duration.total_seconds()
1374
 
                                * 1000), self._reset_approved)
1375
 
        self.send_changedstate()
1376
 
    
1377
 
    ## D-Bus methods, signals & properties
1378
 
    
1379
 
    ## Interfaces
1380
 
    
1381
 
    ## Signals
1382
 
    
1383
 
    # CheckerCompleted - signal
1384
 
    @dbus.service.signal(_interface, signature="nxs")
1385
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1386
 
        "D-Bus signal"
1387
 
        pass
1388
 
    
1389
 
    # CheckerStarted - signal
1390
 
    @dbus.service.signal(_interface, signature="s")
1391
 
    def CheckerStarted(self, command):
1392
 
        "D-Bus signal"
1393
 
        pass
1394
 
    
1395
 
    # PropertyChanged - signal
1396
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1397
 
    @dbus.service.signal(_interface, signature="sv")
1398
 
    def PropertyChanged(self, property, value):
1399
 
        "D-Bus signal"
1400
 
        pass
1401
 
    
1402
 
    # GotSecret - signal
1403
 
    @dbus.service.signal(_interface)
1404
 
    def GotSecret(self):
1405
 
        """D-Bus signal
1406
 
        Is sent after a successful transfer of secret from the Mandos
1407
 
        server to mandos-client
1408
 
        """
1409
 
        pass
1410
 
    
1411
 
    # Rejected - signal
1412
 
    @dbus.service.signal(_interface, signature="s")
1413
 
    def Rejected(self, reason):
1414
 
        "D-Bus signal"
1415
 
        pass
1416
 
    
1417
 
    # NeedApproval - signal
1418
 
    @dbus.service.signal(_interface, signature="tb")
1419
 
    def NeedApproval(self, timeout, default):
1420
 
        "D-Bus signal"
1421
 
        return self.need_approval()
1422
 
    
1423
 
    ## Methods
1424
 
    
1425
 
    # Approve - method
1426
 
    @dbus.service.method(_interface, in_signature="b")
1427
 
    def Approve(self, value):
1428
 
        self.approve(value)
1429
 
    
1430
 
    # CheckedOK - method
1431
 
    @dbus.service.method(_interface)
1432
 
    def CheckedOK(self):
1433
 
        self.checked_ok()
1434
 
    
1435
 
    # Enable - method
1436
 
    @dbus.service.method(_interface)
1437
 
    def Enable(self):
1438
 
        "D-Bus method"
1439
 
        self.enable()
1440
 
    
1441
 
    # StartChecker - method
1442
 
    @dbus.service.method(_interface)
1443
 
    def StartChecker(self):
1444
 
        "D-Bus method"
1445
 
        self.start_checker()
1446
 
    
1447
 
    # Disable - method
1448
 
    @dbus.service.method(_interface)
1449
 
    def Disable(self):
1450
 
        "D-Bus method"
1451
 
        self.disable()
1452
 
    
1453
 
    # StopChecker - method
1454
 
    @dbus.service.method(_interface)
1455
 
    def StopChecker(self):
1456
 
        self.stop_checker()
1457
 
    
1458
 
    ## Properties
1459
 
    
1460
 
    # ApprovalPending - property
1461
 
    @dbus_service_property(_interface, signature="b", access="read")
1462
 
    def ApprovalPending_dbus_property(self):
1463
 
        return dbus.Boolean(bool(self.approvals_pending))
1464
 
    
1465
 
    # ApprovedByDefault - property
1466
 
    @dbus_service_property(_interface, signature="b",
1467
 
                           access="readwrite")
1468
 
    def ApprovedByDefault_dbus_property(self, value=None):
1469
 
        if value is None:       # get
1470
 
            return dbus.Boolean(self.approved_by_default)
1471
 
        self.approved_by_default = bool(value)
1472
 
    
1473
 
    # ApprovalDelay - property
1474
 
    @dbus_service_property(_interface, signature="t",
1475
 
                           access="readwrite")
1476
 
    def ApprovalDelay_dbus_property(self, value=None):
1477
 
        if value is None:       # get
1478
 
            return dbus.UInt64(self.approval_delay.total_seconds()
1479
 
                               * 1000)
1480
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1481
 
    
1482
 
    # ApprovalDuration - property
1483
 
    @dbus_service_property(_interface, signature="t",
1484
 
                           access="readwrite")
1485
 
    def ApprovalDuration_dbus_property(self, value=None):
1486
 
        if value is None:       # get
1487
 
            return dbus.UInt64(self.approval_duration.total_seconds()
1488
 
                               * 1000)
1489
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1490
 
    
1491
 
    # Name - property
1492
 
    @dbus_service_property(_interface, signature="s", access="read")
1493
 
    def Name_dbus_property(self):
1494
 
        return dbus.String(self.name)
1495
 
    
1496
 
    # Fingerprint - property
1497
 
    @dbus_service_property(_interface, signature="s", access="read")
1498
 
    def Fingerprint_dbus_property(self):
1499
 
        return dbus.String(self.fingerprint)
1500
 
    
1501
 
    # Host - property
1502
 
    @dbus_service_property(_interface, signature="s",
1503
 
                           access="readwrite")
1504
 
    def Host_dbus_property(self, value=None):
1505
 
        if value is None:       # get
1506
 
            return dbus.String(self.host)
1507
 
        self.host = str(value)
1508
 
    
1509
 
    # Created - property
1510
 
    @dbus_service_property(_interface, signature="s", access="read")
1511
 
    def Created_dbus_property(self):
1512
 
        return datetime_to_dbus(self.created)
1513
 
    
1514
 
    # LastEnabled - property
1515
 
    @dbus_service_property(_interface, signature="s", access="read")
1516
 
    def LastEnabled_dbus_property(self):
1517
 
        return datetime_to_dbus(self.last_enabled)
1518
 
    
1519
 
    # Enabled - property
1520
 
    @dbus_service_property(_interface, signature="b",
1521
 
                           access="readwrite")
1522
 
    def Enabled_dbus_property(self, value=None):
1523
 
        if value is None:       # get
1524
 
            return dbus.Boolean(self.enabled)
1525
 
        if value:
1526
 
            self.enable()
1527
 
        else:
1528
 
            self.disable()
1529
 
    
1530
 
    # LastCheckedOK - property
1531
 
    @dbus_service_property(_interface, signature="s",
1532
 
                           access="readwrite")
1533
 
    def LastCheckedOK_dbus_property(self, value=None):
1534
 
        if value is not None:
1535
 
            self.checked_ok()
1536
 
            return
1537
 
        return datetime_to_dbus(self.last_checked_ok)
1538
 
    
1539
 
    # LastCheckerStatus - property
1540
 
    @dbus_service_property(_interface, signature="n",
1541
 
                           access="read")
1542
 
    def LastCheckerStatus_dbus_property(self):
1543
 
        return dbus.Int16(self.last_checker_status)
1544
 
    
1545
 
    # Expires - property
1546
 
    @dbus_service_property(_interface, signature="s", access="read")
1547
 
    def Expires_dbus_property(self):
1548
 
        return datetime_to_dbus(self.expires)
1549
 
    
1550
 
    # LastApprovalRequest - property
1551
 
    @dbus_service_property(_interface, signature="s", access="read")
1552
 
    def LastApprovalRequest_dbus_property(self):
1553
 
        return datetime_to_dbus(self.last_approval_request)
1554
 
    
1555
 
    # Timeout - property
1556
 
    @dbus_service_property(_interface, signature="t",
1557
 
                           access="readwrite")
1558
 
    def Timeout_dbus_property(self, value=None):
1559
 
        if value is None:       # get
1560
 
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
1561
 
        old_timeout = self.timeout
1562
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1563
 
        # Reschedule disabling
1564
 
        if self.enabled:
1565
 
            now = datetime.datetime.utcnow()
1566
 
            self.expires += self.timeout - old_timeout
1567
 
            if self.expires <= now:
1568
 
                # The timeout has passed
1569
 
                self.disable()
1570
 
            else:
1571
 
                if (getattr(self, "disable_initiator_tag", None)
1572
 
                    is None):
1573
 
                    return
1574
 
                gobject.source_remove(self.disable_initiator_tag)
1575
 
                self.disable_initiator_tag = (
1576
 
                    gobject.timeout_add(
1577
 
                        int((self.expires - now).total_seconds()
1578
 
                            * 1000), self.disable))
1579
 
    
1580
 
    # ExtendedTimeout - property
1581
 
    @dbus_service_property(_interface, signature="t",
1582
 
                           access="readwrite")
1583
 
    def ExtendedTimeout_dbus_property(self, value=None):
1584
 
        if value is None:       # get
1585
 
            return dbus.UInt64(self.extended_timeout.total_seconds()
1586
 
                               * 1000)
1587
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1588
 
    
1589
 
    # Interval - property
1590
 
    @dbus_service_property(_interface, signature="t",
1591
 
                           access="readwrite")
1592
 
    def Interval_dbus_property(self, value=None):
1593
 
        if value is None:       # get
1594
 
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1595
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1596
 
        if getattr(self, "checker_initiator_tag", None) is None:
1597
 
            return
1598
 
        if self.enabled:
1599
 
            # Reschedule checker run
1600
 
            gobject.source_remove(self.checker_initiator_tag)
1601
 
            self.checker_initiator_tag = (gobject.timeout_add
1602
 
                                          (value, self.start_checker))
1603
 
            self.start_checker()    # Start one now, too
1604
 
    
1605
 
    # Checker - property
1606
 
    @dbus_service_property(_interface, signature="s",
1607
 
                           access="readwrite")
1608
 
    def Checker_dbus_property(self, value=None):
1609
 
        if value is None:       # get
1610
 
            return dbus.String(self.checker_command)
1611
 
        self.checker_command = str(value)
1612
 
    
1613
 
    # CheckerRunning - property
1614
 
    @dbus_service_property(_interface, signature="b",
1615
 
                           access="readwrite")
1616
 
    def CheckerRunning_dbus_property(self, value=None):
1617
 
        if value is None:       # get
1618
 
            return dbus.Boolean(self.checker is not None)
1619
 
        if value:
1620
 
            self.start_checker()
1621
 
        else:
1622
 
            self.stop_checker()
1623
 
    
1624
 
    # ObjectPath - property
1625
 
    @dbus_service_property(_interface, signature="o", access="read")
1626
 
    def ObjectPath_dbus_property(self):
1627
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1628
 
    
1629
 
    # Secret = property
1630
 
    @dbus_service_property(_interface, signature="ay",
1631
 
                           access="write", byte_arrays=True)
1632
 
    def Secret_dbus_property(self, value):
1633
 
        self.secret = bytes(value)
1634
 
    
1635
 
    del _interface
1636
 
 
1637
 
 
1638
 
class ProxyClient(object):
1639
 
    def __init__(self, child_pipe, fpr, address):
1640
 
        self._pipe = child_pipe
1641
 
        self._pipe.send(('init', fpr, address))
1642
 
        if not self._pipe.recv():
1643
 
            raise KeyError()
1644
 
    
1645
 
    def __getattribute__(self, name):
1646
 
        if name == '_pipe':
1647
 
            return super(ProxyClient, self).__getattribute__(name)
1648
 
        self._pipe.send(('getattr', name))
1649
 
        data = self._pipe.recv()
1650
 
        if data[0] == 'data':
1651
 
            return data[1]
1652
 
        if data[0] == 'function':
1653
 
            def func(*args, **kwargs):
1654
 
                self._pipe.send(('funcall', name, args, kwargs))
1655
 
                return self._pipe.recv()[1]
1656
 
            return func
1657
 
    
1658
 
    def __setattr__(self, name, value):
1659
 
        if name == '_pipe':
1660
 
            return super(ProxyClient, self).__setattr__(name, value)
1661
 
        self._pipe.send(('setattr', name, value))
1662
 
 
1663
 
 
1664
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1665
 
    """A class to handle client connections.
1666
 
    
1667
 
    Instantiated once for each connection to handle it.
 
248
    def still_valid(self, now=None):
 
249
        """Has the timeout not yet passed for this client?"""
 
250
        if now is None:
 
251
            now = datetime.datetime.now()
 
252
        if self.last_seen is None:
 
253
            return now < (self.created + self.timeout)
 
254
        else:
 
255
            return now < (self.last_seen + self.timeout)
 
256
 
 
257
 
 
258
def peer_certificate(session):
 
259
    # If not an OpenPGP certificate...
 
260
    if gnutls.library.functions.gnutls_certificate_type_get\
 
261
            (session._c_object) \
 
262
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
263
        # ...do the normal thing
 
264
        return session.peer_certificate
 
265
    list_size = ctypes.c_uint()
 
266
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
267
        (session._c_object, ctypes.byref(list_size))
 
268
    if list_size.value == 0:
 
269
        return None
 
270
    cert = cert_list[0]
 
271
    return ctypes.string_at(cert.data, cert.size)
 
272
 
 
273
 
 
274
def fingerprint(openpgp):
 
275
    # New empty GnuTLS certificate
 
276
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
277
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
278
        (ctypes.byref(crt))
 
279
    # New GnuTLS "datum" with the OpenPGP public key
 
280
    datum = gnutls.library.types.gnutls_datum_t\
 
281
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
282
                     ctypes.POINTER(ctypes.c_ubyte)),
 
283
         ctypes.c_uint(len(openpgp)))
 
284
    # Import the OpenPGP public key into the certificate
 
285
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
286
        (crt,
 
287
         ctypes.byref(datum),
 
288
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
289
    # New buffer for the fingerprint
 
290
    buffer = ctypes.create_string_buffer(20)
 
291
    buffer_length = ctypes.c_size_t()
 
292
    # Get the fingerprint from the certificate into the buffer
 
293
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
294
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
295
    # Deinit the certificate
 
296
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
297
    # Convert the buffer to a Python bytestring
 
298
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
299
    # Convert the bytestring to hexadecimal notation
 
300
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
301
    return hex_fpr
 
302
 
 
303
 
 
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
305
    """A TCP request handler class.
 
306
    Instantiated by IPv6_TCPServer for each request to handle it.
1668
307
    Note: This will run in its own forked process."""
1669
308
    
1670
309
    def handle(self):
1671
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
 
            logger.info("TCP connection from: %s",
1673
 
                        str(self.client_address))
1674
 
            logger.debug("Pipe FD: %d",
1675
 
                         self.server.child_pipe.fileno())
1676
 
            
1677
 
            session = (gnutls.connection
1678
 
                       .ClientSession(self.request,
1679
 
                                      gnutls.connection
1680
 
                                      .X509Credentials()))
1681
 
            
1682
 
            # Note: gnutls.connection.X509Credentials is really a
1683
 
            # generic GnuTLS certificate credentials object so long as
1684
 
            # no X.509 keys are added to it.  Therefore, we can use it
1685
 
            # here despite using OpenPGP certificates.
1686
 
            
1687
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
 
            #                      "+AES-256-CBC", "+SHA1",
1689
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1690
 
            #                      "+DHE-DSS"))
1691
 
            # Use a fallback default, since this MUST be set.
1692
 
            priority = self.server.gnutls_priority
1693
 
            if priority is None:
1694
 
                priority = "NORMAL"
1695
 
            (gnutls.library.functions
1696
 
             .gnutls_priority_set_direct(session._c_object,
1697
 
                                         priority, None))
1698
 
            
1699
 
            # Start communication using the Mandos protocol
1700
 
            # Get protocol number
1701
 
            line = self.request.makefile().readline()
1702
 
            logger.debug("Protocol version: %r", line)
1703
 
            try:
1704
 
                if int(line.strip().split()[0]) > 1:
1705
 
                    raise RuntimeError(line)
1706
 
            except (ValueError, IndexError, RuntimeError) as error:
1707
 
                logger.error("Unknown protocol version: %s", error)
1708
 
                return
1709
 
            
1710
 
            # Start GnuTLS connection
1711
 
            try:
1712
 
                session.handshake()
1713
 
            except gnutls.errors.GNUTLSError as error:
1714
 
                logger.warning("Handshake failed: %s", error)
1715
 
                # Do not run session.bye() here: the session is not
1716
 
                # established.  Just abandon the request.
1717
 
                return
1718
 
            logger.debug("Handshake succeeded")
1719
 
            
1720
 
            approval_required = False
1721
 
            try:
1722
 
                try:
1723
 
                    fpr = self.fingerprint(self.peer_certificate
1724
 
                                           (session))
1725
 
                except (TypeError,
1726
 
                        gnutls.errors.GNUTLSError) as error:
1727
 
                    logger.warning("Bad certificate: %s", error)
1728
 
                    return
1729
 
                logger.debug("Fingerprint: %s", fpr)
1730
 
                
1731
 
                try:
1732
 
                    client = ProxyClient(child_pipe, fpr,
1733
 
                                         self.client_address)
1734
 
                except KeyError:
1735
 
                    return
1736
 
                
1737
 
                if client.approval_delay:
1738
 
                    delay = client.approval_delay
1739
 
                    client.approvals_pending += 1
1740
 
                    approval_required = True
1741
 
                
1742
 
                while True:
1743
 
                    if not client.enabled:
1744
 
                        logger.info("Client %s is disabled",
1745
 
                                       client.name)
1746
 
                        if self.server.use_dbus:
1747
 
                            # Emit D-Bus signal
1748
 
                            client.Rejected("Disabled")
1749
 
                        return
1750
 
                    
1751
 
                    if client.approved or not client.approval_delay:
1752
 
                        #We are approved or approval is disabled
1753
 
                        break
1754
 
                    elif client.approved is None:
1755
 
                        logger.info("Client %s needs approval",
1756
 
                                    client.name)
1757
 
                        if self.server.use_dbus:
1758
 
                            # Emit D-Bus signal
1759
 
                            client.NeedApproval(
1760
 
                                client.approval_delay.total_seconds()
1761
 
                                * 1000, client.approved_by_default)
1762
 
                    else:
1763
 
                        logger.warning("Client %s was not approved",
1764
 
                                       client.name)
1765
 
                        if self.server.use_dbus:
1766
 
                            # Emit D-Bus signal
1767
 
                            client.Rejected("Denied")
1768
 
                        return
1769
 
                    
1770
 
                    #wait until timeout or approved
1771
 
                    time = datetime.datetime.now()
1772
 
                    client.changedstate.acquire()
1773
 
                    client.changedstate.wait(delay.total_seconds())
1774
 
                    client.changedstate.release()
1775
 
                    time2 = datetime.datetime.now()
1776
 
                    if (time2 - time) >= delay:
1777
 
                        if not client.approved_by_default:
1778
 
                            logger.warning("Client %s timed out while"
1779
 
                                           " waiting for approval",
1780
 
                                           client.name)
1781
 
                            if self.server.use_dbus:
1782
 
                                # Emit D-Bus signal
1783
 
                                client.Rejected("Approval timed out")
1784
 
                            return
1785
 
                        else:
1786
 
                            break
1787
 
                    else:
1788
 
                        delay -= time2 - time
1789
 
                
1790
 
                sent_size = 0
1791
 
                while sent_size < len(client.secret):
1792
 
                    try:
1793
 
                        sent = session.send(client.secret[sent_size:])
1794
 
                    except gnutls.errors.GNUTLSError as error:
1795
 
                        logger.warning("gnutls send failed",
1796
 
                                       exc_info=error)
1797
 
                        return
1798
 
                    logger.debug("Sent: %d, remaining: %d",
1799
 
                                 sent, len(client.secret)
1800
 
                                 - (sent_size + sent))
1801
 
                    sent_size += sent
1802
 
                
1803
 
                logger.info("Sending secret to %s", client.name)
1804
 
                # bump the timeout using extended_timeout
1805
 
                client.bump_timeout(client.extended_timeout)
1806
 
                if self.server.use_dbus:
1807
 
                    # Emit D-Bus signal
1808
 
                    client.GotSecret()
1809
 
            
1810
 
            finally:
1811
 
                if approval_required:
1812
 
                    client.approvals_pending -= 1
1813
 
                try:
1814
 
                    session.bye()
1815
 
                except gnutls.errors.GNUTLSError as error:
1816
 
                    logger.warning("GnuTLS bye failed",
1817
 
                                   exc_info=error)
1818
 
    
1819
 
    @staticmethod
1820
 
    def peer_certificate(session):
1821
 
        "Return the peer's OpenPGP certificate as a bytestring"
1822
 
        # If not an OpenPGP certificate...
1823
 
        if (gnutls.library.functions
1824
 
            .gnutls_certificate_type_get(session._c_object)
1825
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1826
 
            # ...do the normal thing
1827
 
            return session.peer_certificate
1828
 
        list_size = ctypes.c_uint(1)
1829
 
        cert_list = (gnutls.library.functions
1830
 
                     .gnutls_certificate_get_peers
1831
 
                     (session._c_object, ctypes.byref(list_size)))
1832
 
        if not bool(cert_list) and list_size.value != 0:
1833
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1834
 
                                            " certificate")
1835
 
        if list_size.value == 0:
1836
 
            return None
1837
 
        cert = cert_list[0]
1838
 
        return ctypes.string_at(cert.data, cert.size)
1839
 
    
1840
 
    @staticmethod
1841
 
    def fingerprint(openpgp):
1842
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1843
 
        # New GnuTLS "datum" with the OpenPGP public key
1844
 
        datum = (gnutls.library.types
1845
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1846
 
                                             ctypes.POINTER
1847
 
                                             (ctypes.c_ubyte)),
1848
 
                                 ctypes.c_uint(len(openpgp))))
1849
 
        # New empty GnuTLS certificate
1850
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1851
 
        (gnutls.library.functions
1852
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1853
 
        # Import the OpenPGP public key into the certificate
1854
 
        (gnutls.library.functions
1855
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1856
 
                                    gnutls.library.constants
1857
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1858
 
        # Verify the self signature in the key
1859
 
        crtverify = ctypes.c_uint()
1860
 
        (gnutls.library.functions
1861
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1862
 
                                         ctypes.byref(crtverify)))
1863
 
        if crtverify.value != 0:
1864
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1865
 
            raise (gnutls.errors.CertificateSecurityError
1866
 
                   ("Verify failed"))
1867
 
        # New buffer for the fingerprint
1868
 
        buf = ctypes.create_string_buffer(20)
1869
 
        buf_len = ctypes.c_size_t()
1870
 
        # Get the fingerprint from the certificate into the buffer
1871
 
        (gnutls.library.functions
1872
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1873
 
                                             ctypes.byref(buf_len)))
1874
 
        # Deinit the certificate
1875
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1876
 
        # Convert the buffer to a Python bytestring
1877
 
        fpr = ctypes.string_at(buf, buf_len.value)
1878
 
        # Convert the bytestring to hexadecimal notation
1879
 
        hex_fpr = binascii.hexlify(fpr).upper()
1880
 
        return hex_fpr
1881
 
 
1882
 
 
1883
 
class MultiprocessingMixIn(object):
1884
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1885
 
    def sub_process_main(self, request, address):
1886
 
        try:
1887
 
            self.finish_request(request, address)
1888
 
        except Exception:
1889
 
            self.handle_error(request, address)
1890
 
        self.close_request(request)
1891
 
    
1892
 
    def process_request(self, request, address):
1893
 
        """Start a new process to process the request."""
1894
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1895
 
                                       args = (request, address))
1896
 
        proc.start()
1897
 
        return proc
1898
 
 
1899
 
 
1900
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1901
 
    """ adds a pipe to the MixIn """
1902
 
    def process_request(self, request, client_address):
1903
 
        """Overrides and wraps the original process_request().
1904
 
        
1905
 
        This function creates a new pipe in self.pipe
1906
 
        """
1907
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1908
 
        
1909
 
        proc = MultiprocessingMixIn.process_request(self, request,
1910
 
                                                    client_address)
1911
 
        self.child_pipe.close()
1912
 
        self.add_pipe(parent_pipe, proc)
1913
 
    
1914
 
    def add_pipe(self, parent_pipe, proc):
1915
 
        """Dummy function; override as necessary"""
1916
 
        raise NotImplementedError()
1917
 
 
1918
 
 
1919
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1920
 
                     socketserver.TCPServer, object):
1921
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1922
 
    
 
310
        logger.debug(u"TCP connection from: %s",
 
311
                     unicode(self.client_address))
 
312
        session = gnutls.connection.ClientSession(self.request,
 
313
                                                  gnutls.connection.\
 
314
                                                  X509Credentials())
 
315
        
 
316
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
317
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
318
        #                "+DHE-DSS"))
 
319
        priority = "SECURE256"
 
320
        
 
321
        gnutls.library.functions.gnutls_priority_set_direct\
 
322
            (session._c_object, priority, None);
 
323
        
 
324
        try:
 
325
            session.handshake()
 
326
        except gnutls.errors.GNUTLSError, error:
 
327
            logger.debug(u"Handshake failed: %s", error)
 
328
            # Do not run session.bye() here: the session is not
 
329
            # established.  Just abandon the request.
 
330
            return
 
331
        try:
 
332
            fpr = fingerprint(peer_certificate(session))
 
333
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
334
            logger.debug(u"Bad certificate: %s", error)
 
335
            session.bye()
 
336
            return
 
337
        logger.debug(u"Fingerprint: %s", fpr)
 
338
        client = None
 
339
        for c in clients:
 
340
            if c.fingerprint == fpr:
 
341
                client = c
 
342
                break
 
343
        # Have to check if client.still_valid(), since it is possible
 
344
        # that the client timed out while establishing the GnuTLS
 
345
        # session.
 
346
        if (not client) or (not client.still_valid()):
 
347
            if client:
 
348
                logger.debug(u"Client %(name)s is invalid",
 
349
                             vars(client))
 
350
            else:
 
351
                logger.debug(u"Client not found for fingerprint: %s",
 
352
                             fpr)
 
353
            session.bye()
 
354
            return
 
355
        sent_size = 0
 
356
        while sent_size < len(client.secret):
 
357
            sent = session.send(client.secret[sent_size:])
 
358
            logger.debug(u"Sent: %d, remaining: %d",
 
359
                         sent, len(client.secret)
 
360
                         - (sent_size + sent))
 
361
            sent_size += sent
 
362
        session.bye()
 
363
 
 
364
 
 
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
366
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1923
367
    Attributes:
1924
 
        enabled:        Boolean; whether this server is activated yet
1925
 
        interface:      None or a network interface name (string)
1926
 
        use_ipv6:       Boolean; to use IPv6 or not
 
368
        options:        Command line options
 
369
        clients:        Set() of Client objects
1927
370
    """
1928
 
    def __init__(self, server_address, RequestHandlerClass,
1929
 
                 interface=None, use_ipv6=True, socketfd=None):
1930
 
        """If socketfd is set, use that file descriptor instead of
1931
 
        creating a new one with socket.socket().
1932
 
        """
1933
 
        self.interface = interface
1934
 
        if use_ipv6:
1935
 
            self.address_family = socket.AF_INET6
1936
 
        if socketfd is not None:
1937
 
            # Save the file descriptor
1938
 
            self.socketfd = socketfd
1939
 
            # Save the original socket.socket() function
1940
 
            self.socket_socket = socket.socket
1941
 
            # To implement --socket, we monkey patch socket.socket.
1942
 
            # 
1943
 
            # (When socketserver.TCPServer is a new-style class, we
1944
 
            # could make self.socket into a property instead of monkey
1945
 
            # patching socket.socket.)
1946
 
            # 
1947
 
            # Create a one-time-only replacement for socket.socket()
1948
 
            @functools.wraps(socket.socket)
1949
 
            def socket_wrapper(*args, **kwargs):
1950
 
                # Restore original function so subsequent calls are
1951
 
                # not affected.
1952
 
                socket.socket = self.socket_socket
1953
 
                del self.socket_socket
1954
 
                # This time only, return a new socket object from the
1955
 
                # saved file descriptor.
1956
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1957
 
            # Replace socket.socket() function with wrapper
1958
 
            socket.socket = socket_wrapper
1959
 
        # The socketserver.TCPServer.__init__ will call
1960
 
        # socket.socket(), which might be our replacement,
1961
 
        # socket_wrapper(), if socketfd was set.
1962
 
        socketserver.TCPServer.__init__(self, server_address,
1963
 
                                        RequestHandlerClass)
1964
 
    
 
371
    address_family = socket.AF_INET6
 
372
    def __init__(self, *args, **kwargs):
 
373
        if "options" in kwargs:
 
374
            self.options = kwargs["options"]
 
375
            del kwargs["options"]
 
376
        if "clients" in kwargs:
 
377
            self.clients = kwargs["clients"]
 
378
            del kwargs["clients"]
 
379
        return super(type(self), self).__init__(*args, **kwargs)
1965
380
    def server_bind(self):
1966
381
        """This overrides the normal server_bind() function
1967
382
        to bind to an interface if one was specified, and also NOT to
1968
383
        bind to an address or port if they were not specified."""
1969
 
        if self.interface is not None:
1970
 
            if SO_BINDTODEVICE is None:
1971
 
                logger.error("SO_BINDTODEVICE does not exist;"
1972
 
                             " cannot bind to interface %s",
1973
 
                             self.interface)
1974
 
            else:
1975
 
                try:
1976
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1977
 
                                           SO_BINDTODEVICE,
1978
 
                                           (self.interface + "\0")
1979
 
                                           .encode("utf-8"))
1980
 
                except socket.error as error:
1981
 
                    if error.errno == errno.EPERM:
1982
 
                        logger.error("No permission to bind to"
1983
 
                                     " interface %s", self.interface)
1984
 
                    elif error.errno == errno.ENOPROTOOPT:
1985
 
                        logger.error("SO_BINDTODEVICE not available;"
1986
 
                                     " cannot bind to interface %s",
1987
 
                                     self.interface)
1988
 
                    elif error.errno == errno.ENODEV:
1989
 
                        logger.error("Interface %s does not exist,"
1990
 
                                     " cannot bind", self.interface)
1991
 
                    else:
1992
 
                        raise
 
384
        if self.options.interface:
 
385
            if not hasattr(socket, "SO_BINDTODEVICE"):
 
386
                # From /usr/include/asm-i486/socket.h
 
387
                socket.SO_BINDTODEVICE = 25
 
388
            try:
 
389
                self.socket.setsockopt(socket.SOL_SOCKET,
 
390
                                       socket.SO_BINDTODEVICE,
 
391
                                       self.options.interface)
 
392
            except socket.error, error:
 
393
                if error[0] == errno.EPERM:
 
394
                    logger.warning(u"No permission to"
 
395
                                   u" bind to interface %s",
 
396
                                   self.options.interface)
 
397
                else:
 
398
                    raise error
1993
399
        # Only bind(2) the socket if we really need to.
1994
400
        if self.server_address[0] or self.server_address[1]:
1995
401
            if not self.server_address[0]:
1996
 
                if self.address_family == socket.AF_INET6:
1997
 
                    any_address = "::" # in6addr_any
1998
 
                else:
1999
 
                    any_address = "0.0.0.0" # INADDR_ANY
2000
 
                self.server_address = (any_address,
 
402
                in6addr_any = "::"
 
403
                self.server_address = (in6addr_any,
2001
404
                                       self.server_address[1])
2002
 
            elif not self.server_address[1]:
 
405
            elif self.server_address[1] is None:
2003
406
                self.server_address = (self.server_address[0],
2004
407
                                       0)
2005
 
#                 if self.interface:
2006
 
#                     self.server_address = (self.server_address[0],
2007
 
#                                            0, # port
2008
 
#                                            0, # flowinfo
2009
 
#                                            if_nametoindex
2010
 
#                                            (self.interface))
2011
 
            return socketserver.TCPServer.server_bind(self)
2012
 
 
2013
 
 
2014
 
class MandosServer(IPv6_TCPServer):
2015
 
    """Mandos server.
2016
 
    
2017
 
    Attributes:
2018
 
        clients:        set of Client objects
2019
 
        gnutls_priority GnuTLS priority string
2020
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2021
 
    
2022
 
    Assumes a gobject.MainLoop event loop.
2023
 
    """
2024
 
    def __init__(self, server_address, RequestHandlerClass,
2025
 
                 interface=None, use_ipv6=True, clients=None,
2026
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
2027
 
        self.enabled = False
2028
 
        self.clients = clients
2029
 
        if self.clients is None:
2030
 
            self.clients = {}
2031
 
        self.use_dbus = use_dbus
2032
 
        self.gnutls_priority = gnutls_priority
2033
 
        IPv6_TCPServer.__init__(self, server_address,
2034
 
                                RequestHandlerClass,
2035
 
                                interface = interface,
2036
 
                                use_ipv6 = use_ipv6,
2037
 
                                socketfd = socketfd)
2038
 
    def server_activate(self):
2039
 
        if self.enabled:
2040
 
            return socketserver.TCPServer.server_activate(self)
2041
 
    
2042
 
    def enable(self):
2043
 
        self.enabled = True
2044
 
    
2045
 
    def add_pipe(self, parent_pipe, proc):
2046
 
        # Call "handle_ipc" for both data and EOF events
2047
 
        gobject.io_add_watch(parent_pipe.fileno(),
2048
 
                             gobject.IO_IN | gobject.IO_HUP,
2049
 
                             functools.partial(self.handle_ipc,
2050
 
                                               parent_pipe =
2051
 
                                               parent_pipe,
2052
 
                                               proc = proc))
2053
 
    
2054
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2055
 
                   proc = None, client_object=None):
2056
 
        # error, or the other end of multiprocessing.Pipe has closed
2057
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2058
 
            # Wait for other process to exit
2059
 
            proc.join()
2060
 
            return False
2061
 
        
2062
 
        # Read a request from the child
2063
 
        request = parent_pipe.recv()
2064
 
        command = request[0]
2065
 
        
2066
 
        if command == 'init':
2067
 
            fpr = request[1]
2068
 
            address = request[2]
2069
 
            
2070
 
            for c in self.clients.itervalues():
2071
 
                if c.fingerprint == fpr:
2072
 
                    client = c
2073
 
                    break
2074
 
            else:
2075
 
                logger.info("Client not found for fingerprint: %s, ad"
2076
 
                            "dress: %s", fpr, address)
2077
 
                if self.use_dbus:
2078
 
                    # Emit D-Bus signal
2079
 
                    mandos_dbus_service.ClientNotFound(fpr,
2080
 
                                                       address[0])
2081
 
                parent_pipe.send(False)
2082
 
                return False
2083
 
            
2084
 
            gobject.io_add_watch(parent_pipe.fileno(),
2085
 
                                 gobject.IO_IN | gobject.IO_HUP,
2086
 
                                 functools.partial(self.handle_ipc,
2087
 
                                                   parent_pipe =
2088
 
                                                   parent_pipe,
2089
 
                                                   proc = proc,
2090
 
                                                   client_object =
2091
 
                                                   client))
2092
 
            parent_pipe.send(True)
2093
 
            # remove the old hook in favor of the new above hook on
2094
 
            # same fileno
2095
 
            return False
2096
 
        if command == 'funcall':
2097
 
            funcname = request[1]
2098
 
            args = request[2]
2099
 
            kwargs = request[3]
2100
 
            
2101
 
            parent_pipe.send(('data', getattr(client_object,
2102
 
                                              funcname)(*args,
2103
 
                                                         **kwargs)))
2104
 
        
2105
 
        if command == 'getattr':
2106
 
            attrname = request[1]
2107
 
            if callable(client_object.__getattribute__(attrname)):
2108
 
                parent_pipe.send(('function',))
2109
 
            else:
2110
 
                parent_pipe.send(('data', client_object
2111
 
                                  .__getattribute__(attrname)))
2112
 
        
2113
 
        if command == 'setattr':
2114
 
            attrname = request[1]
2115
 
            value = request[2]
2116
 
            setattr(client_object, attrname, value)
2117
 
        
2118
 
        return True
2119
 
 
2120
 
 
2121
 
def rfc3339_duration_to_delta(duration):
2122
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2123
 
    
2124
 
    >>> rfc3339_duration_to_delta("P7D")
2125
 
    datetime.timedelta(7)
2126
 
    >>> rfc3339_duration_to_delta("PT60S")
2127
 
    datetime.timedelta(0, 60)
2128
 
    >>> rfc3339_duration_to_delta("PT60M")
2129
 
    datetime.timedelta(0, 3600)
2130
 
    >>> rfc3339_duration_to_delta("PT24H")
2131
 
    datetime.timedelta(1)
2132
 
    >>> rfc3339_duration_to_delta("P1W")
2133
 
    datetime.timedelta(7)
2134
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2135
 
    datetime.timedelta(0, 330)
2136
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2137
 
    datetime.timedelta(1, 200)
2138
 
    """
2139
 
    
2140
 
    # Parsing an RFC 3339 duration with regular expressions is not
2141
 
    # possible - there would have to be multiple places for the same
2142
 
    # values, like seconds.  The current code, while more esoteric, is
2143
 
    # cleaner without depending on a parsing library.  If Python had a
2144
 
    # built-in library for parsing we would use it, but we'd like to
2145
 
    # avoid excessive use of external libraries.
2146
 
    
2147
 
    # New type for defining tokens, syntax, and semantics all-in-one
2148
 
    Token = collections.namedtuple("Token",
2149
 
                                   ("regexp", # To match token; if
2150
 
                                              # "value" is not None,
2151
 
                                              # must have a "group"
2152
 
                                              # containing digits
2153
 
                                    "value",  # datetime.timedelta or
2154
 
                                              # None
2155
 
                                    "followers")) # Tokens valid after
2156
 
                                                  # this token
2157
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2158
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2159
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2160
 
    token_second = Token(re.compile(r"(\d+)S"),
2161
 
                         datetime.timedelta(seconds=1),
2162
 
                         frozenset((token_end,)))
2163
 
    token_minute = Token(re.compile(r"(\d+)M"),
2164
 
                         datetime.timedelta(minutes=1),
2165
 
                         frozenset((token_second, token_end)))
2166
 
    token_hour = Token(re.compile(r"(\d+)H"),
2167
 
                       datetime.timedelta(hours=1),
2168
 
                       frozenset((token_minute, token_end)))
2169
 
    token_time = Token(re.compile(r"T"),
2170
 
                       None,
2171
 
                       frozenset((token_hour, token_minute,
2172
 
                                  token_second)))
2173
 
    token_day = Token(re.compile(r"(\d+)D"),
2174
 
                      datetime.timedelta(days=1),
2175
 
                      frozenset((token_time, token_end)))
2176
 
    token_month = Token(re.compile(r"(\d+)M"),
2177
 
                        datetime.timedelta(weeks=4),
2178
 
                        frozenset((token_day, token_end)))
2179
 
    token_year = Token(re.compile(r"(\d+)Y"),
2180
 
                       datetime.timedelta(weeks=52),
2181
 
                       frozenset((token_month, token_end)))
2182
 
    token_week = Token(re.compile(r"(\d+)W"),
2183
 
                       datetime.timedelta(weeks=1),
2184
 
                       frozenset((token_end,)))
2185
 
    token_duration = Token(re.compile(r"P"), None,
2186
 
                           frozenset((token_year, token_month,
2187
 
                                      token_day, token_time,
2188
 
                                      token_week)))
2189
 
    # Define starting values
2190
 
    value = datetime.timedelta() # Value so far
2191
 
    found_token = None
2192
 
    followers = frozenset((token_duration,)) # Following valid tokens
2193
 
    s = duration                # String left to parse
2194
 
    # Loop until end token is found
2195
 
    while found_token is not token_end:
2196
 
        # Search for any currently valid tokens
2197
 
        for token in followers:
2198
 
            match = token.regexp.match(s)
2199
 
            if match is not None:
2200
 
                # Token found
2201
 
                if token.value is not None:
2202
 
                    # Value found, parse digits
2203
 
                    factor = int(match.group(1), 10)
2204
 
                    # Add to value so far
2205
 
                    value += factor * token.value
2206
 
                # Strip token from string
2207
 
                s = token.regexp.sub("", s, 1)
2208
 
                # Go to found token
2209
 
                found_token = token
2210
 
                # Set valid next tokens
2211
 
                followers = found_token.followers
2212
 
                break
2213
 
        else:
2214
 
            # No currently valid tokens were found
2215
 
            raise ValueError("Invalid RFC 3339 duration")
2216
 
    # End token found
2217
 
    return value
 
408
            return super(type(self), self).server_bind()
2218
409
 
2219
410
 
2220
411
def string_to_delta(interval):
2221
412
    """Parse a string and return a datetime.timedelta
2222
 
    
 
413
 
2223
414
    >>> string_to_delta('7d')
2224
415
    datetime.timedelta(7)
2225
416
    >>> string_to_delta('60s')
2228
419
    datetime.timedelta(0, 3600)
2229
420
    >>> string_to_delta('24h')
2230
421
    datetime.timedelta(1)
2231
 
    >>> string_to_delta('1w')
 
422
    >>> string_to_delta(u'1w')
2232
423
    datetime.timedelta(7)
2233
 
    >>> string_to_delta('5m 30s')
2234
 
    datetime.timedelta(0, 330)
2235
424
    """
2236
 
    
2237
 
    try:
2238
 
        return rfc3339_duration_to_delta(interval)
2239
 
    except ValueError:
2240
 
        pass
2241
 
    
2242
 
    timevalue = datetime.timedelta(0)
2243
 
    for s in interval.split():
2244
 
        try:
2245
 
            suffix = s[-1]
2246
 
            value = int(s[:-1])
2247
 
            if suffix == "d":
2248
 
                delta = datetime.timedelta(value)
2249
 
            elif suffix == "s":
2250
 
                delta = datetime.timedelta(0, value)
2251
 
            elif suffix == "m":
2252
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2253
 
            elif suffix == "h":
2254
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2255
 
            elif suffix == "w":
2256
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2257
 
            else:
2258
 
                raise ValueError("Unknown suffix {!r}"
2259
 
                                 .format(suffix))
2260
 
        except IndexError as e:
2261
 
            raise ValueError(*(e.args))
2262
 
        timevalue += delta
2263
 
    return timevalue
2264
 
 
2265
 
 
2266
 
def daemon(nochdir = False, noclose = False):
2267
 
    """See daemon(3).  Standard BSD Unix function.
2268
 
    
2269
 
    This should really exist as os.daemon, but it doesn't (yet)."""
2270
 
    if os.fork():
2271
 
        sys.exit()
2272
 
    os.setsid()
2273
 
    if not nochdir:
2274
 
        os.chdir("/")
2275
 
    if os.fork():
2276
 
        sys.exit()
2277
 
    if not noclose:
2278
 
        # Close all standard open file descriptors
2279
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2280
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2281
 
            raise OSError(errno.ENODEV, "{} not a character device"
2282
 
                          .format(os.devnull))
2283
 
        os.dup2(null, sys.stdin.fileno())
2284
 
        os.dup2(null, sys.stdout.fileno())
2285
 
        os.dup2(null, sys.stderr.fileno())
2286
 
        if null > 2:
2287
 
            os.close(null)
2288
 
 
2289
 
 
2290
 
def main():
2291
 
    
2292
 
    ##################################################################
2293
 
    # Parsing of options, both command line and config file
2294
 
    
2295
 
    parser = argparse.ArgumentParser()
2296
 
    parser.add_argument("-v", "--version", action="version",
2297
 
                        version = "%(prog)s {}".format(version),
2298
 
                        help="show version number and exit")
2299
 
    parser.add_argument("-i", "--interface", metavar="IF",
2300
 
                        help="Bind to interface IF")
2301
 
    parser.add_argument("-a", "--address",
2302
 
                        help="Address to listen for requests on")
2303
 
    parser.add_argument("-p", "--port", type=int,
2304
 
                        help="Port number to receive requests on")
2305
 
    parser.add_argument("--check", action="store_true",
2306
 
                        help="Run self-test")
2307
 
    parser.add_argument("--debug", action="store_true",
2308
 
                        help="Debug mode; run in foreground and log"
2309
 
                        " to terminal", default=None)
2310
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2311
 
                        help="Debug level for stdout output")
2312
 
    parser.add_argument("--priority", help="GnuTLS"
2313
 
                        " priority string (see GnuTLS documentation)")
2314
 
    parser.add_argument("--servicename",
2315
 
                        metavar="NAME", help="Zeroconf service name")
2316
 
    parser.add_argument("--configdir",
2317
 
                        default="/etc/mandos", metavar="DIR",
2318
 
                        help="Directory to search for configuration"
2319
 
                        " files")
2320
 
    parser.add_argument("--no-dbus", action="store_false",
2321
 
                        dest="use_dbus", help="Do not provide D-Bus"
2322
 
                        " system bus interface", default=None)
2323
 
    parser.add_argument("--no-ipv6", action="store_false",
2324
 
                        dest="use_ipv6", help="Do not use IPv6",
2325
 
                        default=None)
2326
 
    parser.add_argument("--no-restore", action="store_false",
2327
 
                        dest="restore", help="Do not restore stored"
2328
 
                        " state", default=None)
2329
 
    parser.add_argument("--socket", type=int,
2330
 
                        help="Specify a file descriptor to a network"
2331
 
                        " socket to use instead of creating one")
2332
 
    parser.add_argument("--statedir", metavar="DIR",
2333
 
                        help="Directory to save/restore state in")
2334
 
    parser.add_argument("--foreground", action="store_true",
2335
 
                        help="Run in foreground", default=None)
2336
 
    parser.add_argument("--no-zeroconf", action="store_false",
2337
 
                        dest="zeroconf", help="Do not use Zeroconf",
2338
 
                        default=None)
2339
 
    
2340
 
    options = parser.parse_args()
 
425
    try:
 
426
        suffix=unicode(interval[-1])
 
427
        value=int(interval[:-1])
 
428
        if suffix == u"d":
 
429
            delta = datetime.timedelta(value)
 
430
        elif suffix == u"s":
 
431
            delta = datetime.timedelta(0, value)
 
432
        elif suffix == u"m":
 
433
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
434
        elif suffix == u"h":
 
435
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
436
        elif suffix == u"w":
 
437
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
438
        else:
 
439
            raise ValueError
 
440
    except (ValueError, IndexError):
 
441
        raise ValueError
 
442
    return delta
 
443
 
 
444
 
 
445
def add_service():
 
446
    """From the Avahi server example code"""
 
447
    global group, serviceName, serviceType, servicePort, serviceTXT, \
 
448
           domain, host
 
449
    if group is None:
 
450
        group = dbus.Interface(
 
451
                bus.get_object( avahi.DBUS_NAME,
 
452
                                server.EntryGroupNew()),
 
453
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
454
        group.connect_to_signal('StateChanged',
 
455
                                entry_group_state_changed)
 
456
    logger.debug(u"Adding service '%s' of type '%s' ...",
 
457
                 serviceName, serviceType)
 
458
    
 
459
    group.AddService(
 
460
            serviceInterface,           # interface
 
461
            avahi.PROTO_INET6,          # protocol
 
462
            dbus.UInt32(0),             # flags
 
463
            serviceName, serviceType,
 
464
            domain, host,
 
465
            dbus.UInt16(servicePort),
 
466
            avahi.string_array_to_txt_array(serviceTXT))
 
467
    group.Commit()
 
468
 
 
469
 
 
470
def remove_service():
 
471
    """From the Avahi server example code"""
 
472
    global group
 
473
    
 
474
    if not group is None:
 
475
        group.Reset()
 
476
 
 
477
 
 
478
def server_state_changed(state):
 
479
    """From the Avahi server example code"""
 
480
    if state == avahi.SERVER_COLLISION:
 
481
        logger.warning(u"Server name collision")
 
482
        remove_service()
 
483
    elif state == avahi.SERVER_RUNNING:
 
484
        add_service()
 
485
 
 
486
 
 
487
def entry_group_state_changed(state, error):
 
488
    """From the Avahi server example code"""
 
489
    global serviceName, server, rename_count
 
490
    
 
491
    logger.debug(u"state change: %i", state)
 
492
    
 
493
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
494
        logger.debug(u"Service established.")
 
495
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
496
        
 
497
        rename_count = rename_count - 1
 
498
        if rename_count > 0:
 
499
            name = server.GetAlternativeServiceName(name)
 
500
            logger.warning(u"Service name collision, "
 
501
                           u"changing name to '%s' ...", name)
 
502
            remove_service()
 
503
            add_service()
 
504
            
 
505
        else:
 
506
            logger.error(u"No suitable service name found "
 
507
                         u"after %i retries, exiting.",
 
508
                         n_rename)
 
509
            main_loop.quit()
 
510
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
511
        logger.error(u"Error in group state changed %s",
 
512
                     unicode(error))
 
513
        main_loop.quit()
 
514
        return
 
515
 
 
516
 
 
517
def if_nametoindex(interface):
 
518
    """Call the C function if_nametoindex()"""
 
519
    try:
 
520
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
521
        return libc.if_nametoindex(interface)
 
522
    except (OSError, AttributeError):
 
523
        if "struct" not in sys.modules:
 
524
            import struct
 
525
        if "fcntl" not in sys.modules:
 
526
            import fcntl
 
527
        SIOCGIFINDEX = 0x8933      # From /usr/include/linux/sockios.h
 
528
        s = socket.socket()
 
529
        ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
530
                            struct.pack("16s16x", interface))
 
531
        s.close()
 
532
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
533
        return interface_index
 
534
 
 
535
 
 
536
if __name__ == '__main__':
 
537
    parser = OptionParser()
 
538
    parser.add_option("-i", "--interface", type="string",
 
539
                      default=None, metavar="IF",
 
540
                      help="Bind to interface IF")
 
541
    parser.add_option("--cert", type="string", default="cert.pem",
 
542
                      metavar="FILE",
 
543
                      help="Public key certificate PEM file to use")
 
544
    parser.add_option("--key", type="string", default="key.pem",
 
545
                      metavar="FILE",
 
546
                      help="Private key PEM file to use")
 
547
    parser.add_option("--ca", type="string", default="ca.pem",
 
548
                      metavar="FILE",
 
549
                      help="Certificate Authority certificate PEM file to use")
 
550
    parser.add_option("--crl", type="string", default="crl.pem",
 
551
                      metavar="FILE",
 
552
                      help="Certificate Revokation List PEM file to use")
 
553
    parser.add_option("-p", "--port", type="int", default=None,
 
554
                      help="Port number to receive requests on")
 
555
    parser.add_option("--timeout", type="string", # Parsed later
 
556
                      default="1h",
 
557
                      help="Amount of downtime allowed for clients")
 
558
    parser.add_option("--interval", type="string", # Parsed later
 
559
                      default="5m",
 
560
                      help="How often to check that a client is up")
 
561
    parser.add_option("--check", action="store_true", default=False,
 
562
                      help="Run self-test")
 
563
    parser.add_option("--debug", action="store_true", default=False,
 
564
                      help="Debug mode")
 
565
    (options, args) = parser.parse_args()
2341
566
    
2342
567
    if options.check:
2343
568
        import doctest
2344
 
        fail_count, test_count = doctest.testmod()
2345
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2346
 
    
2347
 
    # Default values for config file for server-global settings
2348
 
    server_defaults = { "interface": "",
2349
 
                        "address": "",
2350
 
                        "port": "",
2351
 
                        "debug": "False",
2352
 
                        "priority":
2353
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2354
 
                        "servicename": "Mandos",
2355
 
                        "use_dbus": "True",
2356
 
                        "use_ipv6": "True",
2357
 
                        "debuglevel": "",
2358
 
                        "restore": "True",
2359
 
                        "socket": "",
2360
 
                        "statedir": "/var/lib/mandos",
2361
 
                        "foreground": "False",
2362
 
                        "zeroconf": "True",
2363
 
                        }
2364
 
    
2365
 
    # Parse config file for server-global settings
2366
 
    server_config = configparser.SafeConfigParser(server_defaults)
2367
 
    del server_defaults
2368
 
    server_config.read(os.path.join(options.configdir,
2369
 
                                    "mandos.conf"))
2370
 
    # Convert the SafeConfigParser object to a dict
2371
 
    server_settings = server_config.defaults()
2372
 
    # Use the appropriate methods on the non-string config options
2373
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2374
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2375
 
                                                           option)
2376
 
    if server_settings["port"]:
2377
 
        server_settings["port"] = server_config.getint("DEFAULT",
2378
 
                                                       "port")
2379
 
    if server_settings["socket"]:
2380
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2381
 
                                                         "socket")
2382
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2383
 
        # over with an opened os.devnull.  But we don't want this to
2384
 
        # happen with a supplied network socket.
2385
 
        if 0 <= server_settings["socket"] <= 2:
2386
 
            server_settings["socket"] = os.dup(server_settings
2387
 
                                               ["socket"])
2388
 
    del server_config
2389
 
    
2390
 
    # Override the settings from the config file with command line
2391
 
    # options, if set.
2392
 
    for option in ("interface", "address", "port", "debug",
2393
 
                   "priority", "servicename", "configdir",
2394
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2395
 
                   "statedir", "socket", "foreground", "zeroconf"):
2396
 
        value = getattr(options, option)
2397
 
        if value is not None:
2398
 
            server_settings[option] = value
2399
 
    del options
2400
 
    # Force all strings to be unicode
2401
 
    for option in server_settings.keys():
2402
 
        if isinstance(server_settings[option], bytes):
2403
 
            server_settings[option] = (server_settings[option]
2404
 
                                       .decode("utf-8"))
2405
 
    # Force all boolean options to be boolean
2406
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2407
 
                   "foreground", "zeroconf"):
2408
 
        server_settings[option] = bool(server_settings[option])
2409
 
    # Debug implies foreground
2410
 
    if server_settings["debug"]:
2411
 
        server_settings["foreground"] = True
2412
 
    # Now we have our good server settings in "server_settings"
2413
 
    
2414
 
    ##################################################################
2415
 
    
2416
 
    if (not server_settings["zeroconf"] and
2417
 
        not (server_settings["port"]
2418
 
             or server_settings["socket"] != "")):
2419
 
            parser.error("Needs port or socket to work without"
2420
 
                         " Zeroconf")
2421
 
    
2422
 
    # For convenience
2423
 
    debug = server_settings["debug"]
2424
 
    debuglevel = server_settings["debuglevel"]
2425
 
    use_dbus = server_settings["use_dbus"]
2426
 
    use_ipv6 = server_settings["use_ipv6"]
2427
 
    stored_state_path = os.path.join(server_settings["statedir"],
2428
 
                                     stored_state_file)
2429
 
    foreground = server_settings["foreground"]
2430
 
    zeroconf = server_settings["zeroconf"]
2431
 
    
2432
 
    if debug:
2433
 
        initlogger(debug, logging.DEBUG)
2434
 
    else:
2435
 
        if not debuglevel:
2436
 
            initlogger(debug)
2437
 
        else:
2438
 
            level = getattr(logging, debuglevel.upper())
2439
 
            initlogger(debug, level)
2440
 
    
2441
 
    if server_settings["servicename"] != "Mandos":
2442
 
        syslogger.setFormatter(logging.Formatter
2443
 
                               ('Mandos ({}) [%(process)d]:'
2444
 
                                ' %(levelname)s: %(message)s'
2445
 
                                .format(server_settings
2446
 
                                        ["servicename"])))
2447
 
    
2448
 
    # Parse config file with clients
2449
 
    client_config = configparser.SafeConfigParser(Client
2450
 
                                                  .client_defaults)
2451
 
    client_config.read(os.path.join(server_settings["configdir"],
2452
 
                                    "clients.conf"))
2453
 
    
2454
 
    global mandos_dbus_service
2455
 
    mandos_dbus_service = None
2456
 
    
2457
 
    socketfd = None
2458
 
    if server_settings["socket"] != "":
2459
 
        socketfd = server_settings["socket"]
2460
 
    tcp_server = MandosServer((server_settings["address"],
2461
 
                               server_settings["port"]),
2462
 
                              ClientHandler,
2463
 
                              interface=(server_settings["interface"]
2464
 
                                         or None),
2465
 
                              use_ipv6=use_ipv6,
2466
 
                              gnutls_priority=
2467
 
                              server_settings["priority"],
2468
 
                              use_dbus=use_dbus,
2469
 
                              socketfd=socketfd)
2470
 
    if not foreground:
2471
 
        pidfilename = "/run/mandos.pid"
2472
 
        if not os.path.isdir("/run/."):
2473
 
            pidfilename = "/var/run/mandos.pid"
2474
 
        pidfile = None
2475
 
        try:
2476
 
            pidfile = open(pidfilename, "w")
2477
 
        except IOError as e:
2478
 
            logger.error("Could not open file %r", pidfilename,
2479
 
                         exc_info=e)
2480
 
    
2481
 
    for name in ("_mandos", "mandos", "nobody"):
2482
 
        try:
2483
 
            uid = pwd.getpwnam(name).pw_uid
2484
 
            gid = pwd.getpwnam(name).pw_gid
2485
 
            break
2486
 
        except KeyError:
2487
 
            continue
2488
 
    else:
2489
 
        uid = 65534
2490
 
        gid = 65534
2491
 
    try:
2492
 
        os.setgid(gid)
2493
 
        os.setuid(uid)
2494
 
    except OSError as error:
2495
 
        if error.errno != errno.EPERM:
2496
 
            raise
2497
 
    
2498
 
    if debug:
2499
 
        # Enable all possible GnuTLS debugging
2500
 
        
2501
 
        # "Use a log level over 10 to enable all debugging options."
2502
 
        # - GnuTLS manual
2503
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2504
 
        
2505
 
        @gnutls.library.types.gnutls_log_func
2506
 
        def debug_gnutls(level, string):
2507
 
            logger.debug("GnuTLS: %s", string[:-1])
2508
 
        
2509
 
        (gnutls.library.functions
2510
 
         .gnutls_global_set_log_function(debug_gnutls))
2511
 
        
2512
 
        # Redirect stdin so all checkers get /dev/null
2513
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2514
 
        os.dup2(null, sys.stdin.fileno())
2515
 
        if null > 2:
2516
 
            os.close(null)
2517
 
    
2518
 
    # Need to fork before connecting to D-Bus
2519
 
    if not foreground:
2520
 
        # Close all input and output, do double fork, etc.
2521
 
        daemon()
2522
 
    
2523
 
    # multiprocessing will use threads, so before we use gobject we
2524
 
    # need to inform gobject that threads will be used.
2525
 
    gobject.threads_init()
2526
 
    
2527
 
    global main_loop
2528
 
    # From the Avahi example code
2529
 
    DBusGMainLoop(set_as_default=True)
 
569
        doctest.testmod()
 
570
        sys.exit()
 
571
    
 
572
    # Parse the time arguments
 
573
    try:
 
574
        options.timeout = string_to_delta(options.timeout)
 
575
    except ValueError:
 
576
        parser.error("option --timeout: Unparseable time")
 
577
    try:
 
578
        options.interval = string_to_delta(options.interval)
 
579
    except ValueError:
 
580
        parser.error("option --interval: Unparseable time")
 
581
    
 
582
    # Parse config file
 
583
    defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
 
584
    client_config = ConfigParser.SafeConfigParser(defaults)
 
585
    #client_config.readfp(open("secrets.conf"), "secrets.conf")
 
586
    client_config.read("mandos-clients.conf")
 
587
    
 
588
    # From the Avahi server example code
 
589
    DBusGMainLoop(set_as_default=True )
2530
590
    main_loop = gobject.MainLoop()
2531
591
    bus = dbus.SystemBus()
2532
 
    # End of Avahi example code
2533
 
    if use_dbus:
2534
 
        try:
2535
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2536
 
                                            bus, do_not_queue=True)
2537
 
            old_bus_name = (dbus.service.BusName
2538
 
                            ("se.bsnet.fukt.Mandos", bus,
2539
 
                             do_not_queue=True))
2540
 
        except dbus.exceptions.NameExistsException as e:
2541
 
            logger.error("Disabling D-Bus:", exc_info=e)
2542
 
            use_dbus = False
2543
 
            server_settings["use_dbus"] = False
2544
 
            tcp_server.use_dbus = False
2545
 
    if zeroconf:
2546
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2547
 
        service = AvahiServiceToSyslog(name =
2548
 
                                       server_settings["servicename"],
2549
 
                                       servicetype = "_mandos._tcp",
2550
 
                                       protocol = protocol, bus = bus)
2551
 
        if server_settings["interface"]:
2552
 
            service.interface = (if_nametoindex
2553
 
                                 (server_settings["interface"]
2554
 
                                  .encode("utf-8")))
2555
 
    
2556
 
    global multiprocessing_manager
2557
 
    multiprocessing_manager = multiprocessing.Manager()
2558
 
    
2559
 
    client_class = Client
2560
 
    if use_dbus:
2561
 
        client_class = functools.partial(ClientDBus, bus = bus)
2562
 
    
2563
 
    client_settings = Client.config_parser(client_config)
2564
 
    old_client_settings = {}
2565
 
    clients_data = {}
2566
 
    
2567
 
    # This is used to redirect stdout and stderr for checker processes
2568
 
    global wnull
2569
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2570
 
    # Only used if server is running in foreground but not in debug
2571
 
    # mode
2572
 
    if debug or not foreground:
2573
 
        wnull.close()
2574
 
    
2575
 
    # Get client data and settings from last running state.
2576
 
    if server_settings["restore"]:
2577
 
        try:
2578
 
            with open(stored_state_path, "rb") as stored_state:
2579
 
                clients_data, old_client_settings = (pickle.load
2580
 
                                                     (stored_state))
2581
 
            os.remove(stored_state_path)
2582
 
        except IOError as e:
2583
 
            if e.errno == errno.ENOENT:
2584
 
                logger.warning("Could not load persistent state: {}"
2585
 
                                .format(os.strerror(e.errno)))
2586
 
            else:
2587
 
                logger.critical("Could not load persistent state:",
2588
 
                                exc_info=e)
2589
 
                raise
2590
 
        except EOFError as e:
2591
 
            logger.warning("Could not load persistent state: "
2592
 
                           "EOFError:", exc_info=e)
2593
 
    
2594
 
    with PGPEngine() as pgp:
2595
 
        for client_name, client in clients_data.items():
2596
 
            # Skip removed clients
2597
 
            if client_name not in client_settings:
2598
 
                continue
2599
 
            
2600
 
            # Decide which value to use after restoring saved state.
2601
 
            # We have three different values: Old config file,
2602
 
            # new config file, and saved state.
2603
 
            # New config value takes precedence if it differs from old
2604
 
            # config value, otherwise use saved state.
2605
 
            for name, value in client_settings[client_name].items():
2606
 
                try:
2607
 
                    # For each value in new config, check if it
2608
 
                    # differs from the old config value (Except for
2609
 
                    # the "secret" attribute)
2610
 
                    if (name != "secret" and
2611
 
                        value != old_client_settings[client_name]
2612
 
                        [name]):
2613
 
                        client[name] = value
2614
 
                except KeyError:
2615
 
                    pass
2616
 
            
2617
 
            # Clients who has passed its expire date can still be
2618
 
            # enabled if its last checker was successful.  Clients
2619
 
            # whose checker succeeded before we stored its state is
2620
 
            # assumed to have successfully run all checkers during
2621
 
            # downtime.
2622
 
            if client["enabled"]:
2623
 
                if datetime.datetime.utcnow() >= client["expires"]:
2624
 
                    if not client["last_checked_ok"]:
2625
 
                        logger.warning(
2626
 
                            "disabling client {} - Client never "
2627
 
                            "performed a successful checker"
2628
 
                            .format(client_name))
2629
 
                        client["enabled"] = False
2630
 
                    elif client["last_checker_status"] != 0:
2631
 
                        logger.warning(
2632
 
                            "disabling client {} - Client last"
2633
 
                            " checker failed with error code {}"
2634
 
                            .format(client_name,
2635
 
                                    client["last_checker_status"]))
2636
 
                        client["enabled"] = False
2637
 
                    else:
2638
 
                        client["expires"] = (datetime.datetime
2639
 
                                             .utcnow()
2640
 
                                             + client["timeout"])
2641
 
                        logger.debug("Last checker succeeded,"
2642
 
                                     " keeping {} enabled"
2643
 
                                     .format(client_name))
2644
 
            try:
2645
 
                client["secret"] = (
2646
 
                    pgp.decrypt(client["encrypted_secret"],
2647
 
                                client_settings[client_name]
2648
 
                                ["secret"]))
2649
 
            except PGPError:
2650
 
                # If decryption fails, we use secret from new settings
2651
 
                logger.debug("Failed to decrypt {} old secret"
2652
 
                             .format(client_name))
2653
 
                client["secret"] = (
2654
 
                    client_settings[client_name]["secret"])
2655
 
    
2656
 
    # Add/remove clients based on new changes made to config
2657
 
    for client_name in (set(old_client_settings)
2658
 
                        - set(client_settings)):
2659
 
        del clients_data[client_name]
2660
 
    for client_name in (set(client_settings)
2661
 
                        - set(old_client_settings)):
2662
 
        clients_data[client_name] = client_settings[client_name]
2663
 
    
2664
 
    # Create all client objects
2665
 
    for client_name, client in clients_data.items():
2666
 
        tcp_server.clients[client_name] = client_class(
2667
 
            name = client_name, settings = client,
2668
 
            server_settings = server_settings)
2669
 
    
2670
 
    if not tcp_server.clients:
2671
 
        logger.warning("No clients defined")
2672
 
    
2673
 
    if not foreground:
2674
 
        if pidfile is not None:
2675
 
            try:
2676
 
                with pidfile:
2677
 
                    pid = os.getpid()
2678
 
                    pidfile.write("{}\n".format(pid).encode("utf-8"))
2679
 
            except IOError:
2680
 
                logger.error("Could not write to file %r with PID %d",
2681
 
                             pidfilename, pid)
2682
 
        del pidfile
2683
 
        del pidfilename
2684
 
    
2685
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2686
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2687
 
    
2688
 
    if use_dbus:
2689
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2690
 
                                        "se.bsnet.fukt.Mandos"})
2691
 
        class MandosDBusService(DBusObjectWithProperties):
2692
 
            """A D-Bus proxy object"""
2693
 
            def __init__(self):
2694
 
                dbus.service.Object.__init__(self, bus, "/")
2695
 
            _interface = "se.recompile.Mandos"
2696
 
            
2697
 
            @dbus_interface_annotations(_interface)
2698
 
            def _foo(self):
2699
 
                return { "org.freedesktop.DBus.Property"
2700
 
                         ".EmitsChangedSignal":
2701
 
                             "false"}
2702
 
            
2703
 
            @dbus.service.signal(_interface, signature="o")
2704
 
            def ClientAdded(self, objpath):
2705
 
                "D-Bus signal"
2706
 
                pass
2707
 
            
2708
 
            @dbus.service.signal(_interface, signature="ss")
2709
 
            def ClientNotFound(self, fingerprint, address):
2710
 
                "D-Bus signal"
2711
 
                pass
2712
 
            
2713
 
            @dbus.service.signal(_interface, signature="os")
2714
 
            def ClientRemoved(self, objpath, name):
2715
 
                "D-Bus signal"
2716
 
                pass
2717
 
            
2718
 
            @dbus.service.method(_interface, out_signature="ao")
2719
 
            def GetAllClients(self):
2720
 
                "D-Bus method"
2721
 
                return dbus.Array(c.dbus_object_path
2722
 
                                  for c in
2723
 
                                  tcp_server.clients.itervalues())
2724
 
            
2725
 
            @dbus.service.method(_interface,
2726
 
                                 out_signature="a{oa{sv}}")
2727
 
            def GetAllClientsWithProperties(self):
2728
 
                "D-Bus method"
2729
 
                return dbus.Dictionary(
2730
 
                    { c.dbus_object_path: c.GetAll("")
2731
 
                      for c in tcp_server.clients.itervalues() },
2732
 
                    signature="oa{sv}")
2733
 
            
2734
 
            @dbus.service.method(_interface, in_signature="o")
2735
 
            def RemoveClient(self, object_path):
2736
 
                "D-Bus method"
2737
 
                for c in tcp_server.clients.itervalues():
2738
 
                    if c.dbus_object_path == object_path:
2739
 
                        del tcp_server.clients[c.name]
2740
 
                        c.remove_from_connection()
2741
 
                        # Don't signal anything except ClientRemoved
2742
 
                        c.disable(quiet=True)
2743
 
                        # Emit D-Bus signal
2744
 
                        self.ClientRemoved(object_path, c.name)
2745
 
                        return
2746
 
                raise KeyError(object_path)
2747
 
            
2748
 
            del _interface
2749
 
        
2750
 
        mandos_dbus_service = MandosDBusService()
2751
 
    
2752
 
    def cleanup():
2753
 
        "Cleanup function; run on exit"
2754
 
        if zeroconf:
2755
 
            service.cleanup()
2756
 
        
2757
 
        multiprocessing.active_children()
2758
 
        wnull.close()
2759
 
        if not (tcp_server.clients or client_settings):
2760
 
            return
2761
 
        
2762
 
        # Store client before exiting. Secrets are encrypted with key
2763
 
        # based on what config file has. If config file is
2764
 
        # removed/edited, old secret will thus be unrecovable.
2765
 
        clients = {}
2766
 
        with PGPEngine() as pgp:
2767
 
            for client in tcp_server.clients.itervalues():
2768
 
                key = client_settings[client.name]["secret"]
2769
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2770
 
                                                      key)
2771
 
                client_dict = {}
2772
 
                
2773
 
                # A list of attributes that can not be pickled
2774
 
                # + secret.
2775
 
                exclude = { "bus", "changedstate", "secret",
2776
 
                            "checker", "server_settings" }
2777
 
                for name, typ in (inspect.getmembers
2778
 
                                  (dbus.service.Object)):
2779
 
                    exclude.add(name)
2780
 
                
2781
 
                client_dict["encrypted_secret"] = (client
2782
 
                                                   .encrypted_secret)
2783
 
                for attr in client.client_structure:
2784
 
                    if attr not in exclude:
2785
 
                        client_dict[attr] = getattr(client, attr)
2786
 
                
2787
 
                clients[client.name] = client_dict
2788
 
                del client_settings[client.name]["secret"]
2789
 
        
2790
 
        try:
2791
 
            with (tempfile.NamedTemporaryFile
2792
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2793
 
                   dir=os.path.dirname(stored_state_path),
2794
 
                   delete=False)) as stored_state:
2795
 
                pickle.dump((clients, client_settings), stored_state)
2796
 
                tempname=stored_state.name
2797
 
            os.rename(tempname, stored_state_path)
2798
 
        except (IOError, OSError) as e:
2799
 
            if not debug:
2800
 
                try:
2801
 
                    os.remove(tempname)
2802
 
                except NameError:
2803
 
                    pass
2804
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2805
 
                logger.warning("Could not save persistent state: {}"
2806
 
                               .format(os.strerror(e.errno)))
2807
 
            else:
2808
 
                logger.warning("Could not save persistent state:",
2809
 
                               exc_info=e)
2810
 
                raise
2811
 
        
2812
 
        # Delete all clients, and settings from config
2813
 
        while tcp_server.clients:
2814
 
            name, client = tcp_server.clients.popitem()
2815
 
            if use_dbus:
2816
 
                client.remove_from_connection()
2817
 
            # Don't signal anything except ClientRemoved
2818
 
            client.disable(quiet=True)
2819
 
            if use_dbus:
2820
 
                # Emit D-Bus signal
2821
 
                mandos_dbus_service.ClientRemoved(client
2822
 
                                                  .dbus_object_path,
2823
 
                                                  client.name)
2824
 
        client_settings.clear()
2825
 
    
2826
 
    atexit.register(cleanup)
2827
 
    
2828
 
    for client in tcp_server.clients.itervalues():
2829
 
        if use_dbus:
2830
 
            # Emit D-Bus signal
2831
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2832
 
        # Need to initiate checking of clients
2833
 
        if client.enabled:
2834
 
            client.init_checker()
2835
 
    
2836
 
    tcp_server.enable()
2837
 
    tcp_server.server_activate()
2838
 
    
2839
 
    # Find out what port we got
2840
 
    if zeroconf:
2841
 
        service.port = tcp_server.socket.getsockname()[1]
2842
 
    if use_ipv6:
2843
 
        logger.info("Now listening on address %r, port %d,"
2844
 
                    " flowinfo %d, scope_id %d",
2845
 
                    *tcp_server.socket.getsockname())
2846
 
    else:                       # IPv4
2847
 
        logger.info("Now listening on address %r, port %d",
2848
 
                    *tcp_server.socket.getsockname())
2849
 
    
2850
 
    #service.interface = tcp_server.socket.getsockname()[3]
2851
 
    
 
592
    server = dbus.Interface(
 
593
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
594
            avahi.DBUS_INTERFACE_SERVER )
 
595
    # End of Avahi example code
 
596
    
 
597
    debug = options.debug
 
598
    
 
599
    clients = Set()
 
600
    def remove_from_clients(client):
 
601
        clients.remove(client)
 
602
        if not clients:
 
603
            logger.debug(u"No clients left, exiting")
 
604
            main_loop.quit()
 
605
    
 
606
    clients.update(Set(Client(name=section, options=options,
 
607
                              stop_hook = remove_from_clients,
 
608
                              **(dict(client_config\
 
609
                                      .items(section))))
 
610
                       for section in client_config.sections()))
 
611
    for client in clients:
 
612
        client.start()
 
613
    
 
614
    tcp_server = IPv6_TCPServer((None, options.port),
 
615
                                tcp_handler,
 
616
                                options=options,
 
617
                                clients=clients)
 
618
    # Find out what random port we got
 
619
    servicePort = tcp_server.socket.getsockname()[1]
 
620
    logger.debug(u"Now listening on port %d", servicePort)
 
621
    
 
622
    if options.interface is not None:
 
623
        serviceInterface = if_nametoindex(options.interface)
 
624
    
 
625
    # From the Avahi server example code
 
626
    server.connect_to_signal("StateChanged", server_state_changed)
 
627
    server_state_changed(server.GetState())
 
628
    # End of Avahi example code
 
629
    
 
630
    gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
 
631
                         lambda *args, **kwargs:
 
632
                         tcp_server.handle_request(*args[2:],
 
633
                                                   **kwargs) or True)
2852
634
    try:
2853
 
        if zeroconf:
2854
 
            # From the Avahi example code
2855
 
            try:
2856
 
                service.activate()
2857
 
            except dbus.exceptions.DBusException as error:
2858
 
                logger.critical("D-Bus Exception", exc_info=error)
2859
 
                cleanup()
2860
 
                sys.exit(1)
2861
 
            # End of Avahi example code
2862
 
        
2863
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2864
 
                             lambda *args, **kwargs:
2865
 
                             (tcp_server.handle_request
2866
 
                              (*args[2:], **kwargs) or True))
2867
 
        
2868
 
        logger.debug("Starting main loop")
2869
635
        main_loop.run()
2870
 
    except AvahiError as error:
2871
 
        logger.critical("Avahi Error", exc_info=error)
2872
 
        cleanup()
2873
 
        sys.exit(1)
2874
636
    except KeyboardInterrupt:
2875
 
        if debug:
2876
 
            print("", file=sys.stderr)
2877
 
        logger.debug("Server received KeyboardInterrupt")
2878
 
    logger.debug("Server exiting")
2879
 
    # Must run before the D-Bus bus name gets deregistered
2880
 
    cleanup()
 
637
        print
 
638
    
 
639
    # Cleanup here
2881
640
 
2882
 
if __name__ == '__main__':
2883
 
    main()
 
641
    # From the Avahi server example code
 
642
    if not group is None:
 
643
        group.Free()
 
644
    # End of Avahi example code
 
645
    
 
646
    for client in clients:
 
647
        client.stop_hook = None
 
648
        client.stop()