/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2008-08-02 14:33:47 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080802143347-u1m4zs1q0feu72ei
* TODO: Converted to org-mode style

* plugins.d/mandosclient.c (certdir): Changed to "/conf/conf.d/mandos/".
  (certdir, certfile, certkey, pgp_packet_decrypt, debuggnutls,
  initgnutls, empty_log, combinepath): Made static.
  (combinepath): Rewritten to only get the argument string lengths
                 once.  Do not print error message; leave that to
                 caller.  All callers changed.

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Lines of Context:
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6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# following functions: "AvahiService.add", "AvahiService.remove",
 
10
# "server_state_changed", "entry_group_state_changed", and some lines
 
11
# in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008-2014 Teddy Hogeborn
15
 
# Copyright © 2008-2014 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
#     GNU General Public License for more details.
26
25
27
26
# 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
 
27
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
28
 
29
# Contact the authors at <mandos@fukt.bsnet.se>.
 
30
 
31
 
 
32
from __future__ import division
 
33
 
 
34
import SocketServer
40
35
import socket
41
 
import argparse
 
36
import select
 
37
from optparse import OptionParser
42
38
import datetime
43
39
import errno
44
40
import gnutls.crypto
47
43
import gnutls.library.functions
48
44
import gnutls.library.constants
49
45
import gnutls.library.types
50
 
import ConfigParser as configparser
 
46
import ConfigParser
51
47
import sys
52
48
import re
53
49
import os
54
50
import signal
 
51
from sets import Set
55
52
import subprocess
56
53
import atexit
57
54
import stat
58
55
import logging
59
56
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
57
 
73
58
import dbus
74
 
import dbus.service
75
59
import gobject
76
60
import avahi
77
61
from dbus.mainloop.glib import DBusGMainLoop
78
62
import ctypes
79
 
import ctypes.util
80
 
import xml.dom.minidom
81
 
import inspect
82
 
 
83
 
try:
84
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
 
except AttributeError:
86
 
    try:
87
 
        from IN import SO_BINDTODEVICE
88
 
    except ImportError:
89
 
        SO_BINDTODEVICE = None
90
 
 
91
 
version = "1.6.4"
92
 
stored_state_file = "clients.pickle"
93
 
 
94
 
logger = logging.getLogger()
95
 
syslogger = None
96
 
 
97
 
try:
98
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
99
 
                      (ctypes.util.find_library("c"))
100
 
                      .if_nametoindex)
101
 
except (OSError, AttributeError):
102
 
    def if_nametoindex(interface):
103
 
        "Get an interface index the hard way, i.e. using fcntl()"
104
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
105
 
        with contextlib.closing(socket.socket()) as s:
106
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
 
                                struct.pack(str("16s16x"),
108
 
                                            interface))
109
 
        interface_index = struct.unpack(str("I"),
110
 
                                        ifreq[16:20])[0]
111
 
        return interface_index
112
 
 
113
 
 
114
 
def initlogger(debug, level=logging.WARNING):
115
 
    """init logger and add loglevel"""
116
 
    
117
 
    syslogger = (logging.handlers.SysLogHandler
118
 
                 (facility =
119
 
                  logging.handlers.SysLogHandler.LOG_DAEMON,
120
 
                  address = str("/dev/log")))
121
 
    syslogger.setFormatter(logging.Formatter
122
 
                           ('Mandos [%(process)d]: %(levelname)s:'
123
 
                            ' %(message)s'))
124
 
    logger.addHandler(syslogger)
125
 
    
126
 
    if debug:
127
 
        console = logging.StreamHandler()
128
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
129
 
                                               ' [%(process)d]:'
130
 
                                               ' %(levelname)s:'
131
 
                                               ' %(message)s'))
132
 
        logger.addHandler(console)
133
 
    logger.setLevel(level)
134
 
 
135
 
 
136
 
class PGPError(Exception):
137
 
    """Exception if encryption/decryption fails"""
138
 
    pass
139
 
 
140
 
 
141
 
class PGPEngine(object):
142
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
143
 
    def __init__(self):
144
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
145
 
        self.gnupgargs = ['--batch',
146
 
                          '--home', self.tempdir,
147
 
                          '--force-mdc',
148
 
                          '--quiet',
149
 
                          '--no-use-agent']
150
 
    
151
 
    def __enter__(self):
152
 
        return self
153
 
    
154
 
    def __exit__(self, exc_type, exc_value, traceback):
155
 
        self._cleanup()
156
 
        return False
157
 
    
158
 
    def __del__(self):
159
 
        self._cleanup()
160
 
    
161
 
    def _cleanup(self):
162
 
        if self.tempdir is not None:
163
 
            # Delete contents of tempdir
164
 
            for root, dirs, files in os.walk(self.tempdir,
165
 
                                             topdown = False):
166
 
                for filename in files:
167
 
                    os.remove(os.path.join(root, filename))
168
 
                for dirname in dirs:
169
 
                    os.rmdir(os.path.join(root, dirname))
170
 
            # Remove tempdir
171
 
            os.rmdir(self.tempdir)
172
 
            self.tempdir = None
173
 
    
174
 
    def password_encode(self, password):
175
 
        # Passphrase can not be empty and can not contain newlines or
176
 
        # NUL bytes.  So we prefix it and hex encode it.
177
 
        encoded = b"mandos" + binascii.hexlify(password)
178
 
        if len(encoded) > 2048:
179
 
            # GnuPG can't handle long passwords, so encode differently
180
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
181
 
                       .replace(b"\n", b"\\n")
182
 
                       .replace(b"\0", b"\\x00"))
183
 
        return encoded
184
 
    
185
 
    def encrypt(self, data, password):
186
 
        passphrase = self.password_encode(password)
187
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
188
 
                                         ) as passfile:
189
 
            passfile.write(passphrase)
190
 
            passfile.flush()
191
 
            proc = subprocess.Popen(['gpg', '--symmetric',
192
 
                                     '--passphrase-file',
193
 
                                     passfile.name]
194
 
                                    + self.gnupgargs,
195
 
                                    stdin = subprocess.PIPE,
196
 
                                    stdout = subprocess.PIPE,
197
 
                                    stderr = subprocess.PIPE)
198
 
            ciphertext, err = proc.communicate(input = data)
199
 
        if proc.returncode != 0:
200
 
            raise PGPError(err)
201
 
        return ciphertext
202
 
    
203
 
    def decrypt(self, data, password):
204
 
        passphrase = self.password_encode(password)
205
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
206
 
                                         ) as passfile:
207
 
            passfile.write(passphrase)
208
 
            passfile.flush()
209
 
            proc = subprocess.Popen(['gpg', '--decrypt',
210
 
                                     '--passphrase-file',
211
 
                                     passfile.name]
212
 
                                    + self.gnupgargs,
213
 
                                    stdin = subprocess.PIPE,
214
 
                                    stdout = subprocess.PIPE,
215
 
                                    stderr = subprocess.PIPE)
216
 
            decrypted_plaintext, err = proc.communicate(input
217
 
                                                        = data)
218
 
        if proc.returncode != 0:
219
 
            raise PGPError(err)
220
 
        return decrypted_plaintext
 
63
 
 
64
# Brief description of the operation of this program:
 
65
 
66
# This server announces itself as a Zeroconf service.  Connecting
 
67
# clients use the TLS protocol, with the unusual quirk that this
 
68
# server program acts as a TLS "client" while a connecting client acts
 
69
# as a TLS "server".  The client (acting as a TLS "server") must
 
70
# supply an OpenPGP certificate, and the fingerprint of this
 
71
# certificate is used by this server to look up (in a list read from a
 
72
# file at start time) which binary blob to give the client.  No other
 
73
# authentication or authorization is done by this server.
 
74
 
 
75
 
 
76
logger = logging.Logger('mandos')
 
77
syslogger = logging.handlers.SysLogHandler\
 
78
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
 
79
syslogger.setFormatter(logging.Formatter\
 
80
                        ('%(levelname)s: %(message)s'))
 
81
logger.addHandler(syslogger)
 
82
del syslogger
221
83
 
222
84
 
223
85
class AvahiError(Exception):
224
 
    def __init__(self, value, *args, **kwargs):
 
86
    def __init__(self, value):
225
87
        self.value = value
226
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
227
 
    def __unicode__(self):
228
 
        return unicode(repr(self.value))
 
88
    def __str__(self):
 
89
        return repr(self.value)
229
90
 
230
91
class AvahiServiceError(AvahiError):
231
92
    pass
235
96
 
236
97
 
237
98
class AvahiService(object):
238
 
    """An Avahi (Zeroconf) service.
239
 
    
240
 
    Attributes:
 
99
    """
241
100
    interface: integer; avahi.IF_UNSPEC or an interface index.
242
101
               Used to optionally bind to the specified interface.
243
 
    name: string; Example: 'Mandos'
244
 
    type: string; Example: '_mandos._tcp'.
245
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
246
 
    port: integer; what port to announce
247
 
    TXT: list of strings; TXT record for the service
248
 
    domain: string; Domain to publish on, default to .local if empty.
249
 
    host: string; Host to publish records for, default is localhost
250
 
    max_renames: integer; maximum number of renames
251
 
    rename_count: integer; counter so we only rename after collisions
252
 
                  a sensible number of times
253
 
    group: D-Bus Entry Group
254
 
    server: D-Bus Server
255
 
    bus: dbus.SystemBus()
 
102
    name = string; Example: "Mandos"
 
103
    type = string; Example: "_mandos._tcp".
 
104
                   See <http://www.dns-sd.org/ServiceTypes.html>
 
105
    port = integer; what port to announce
 
106
    TXT = list of strings; TXT record for the service
 
107
    domain = string; Domain to publish on, default to .local if empty.
 
108
    host = string; Host to publish records for, default to localhost
 
109
                   if empty.
 
110
    max_renames = integer; maximum number of renames
 
111
    rename_count = integer; counter so we only rename after collisions
 
112
                   a sensible number of times
256
113
    """
257
 
    
258
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
259
 
                 servicetype = None, port = None, TXT = None,
260
 
                 domain = "", host = "", max_renames = 32768,
261
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
115
                 type = None, port = None, TXT = None, domain = "",
 
116
                 host = "", max_renames = 12):
 
117
        """An Avahi (Zeroconf) service. """
262
118
        self.interface = interface
263
119
        self.name = name
264
 
        self.type = servicetype
 
120
        self.type = type
265
121
        self.port = port
266
 
        self.TXT = TXT if TXT is not None else []
 
122
        if TXT is None:
 
123
            self.TXT = []
 
124
        else:
 
125
            self.TXT = TXT
267
126
        self.domain = domain
268
127
        self.host = host
269
128
        self.rename_count = 0
270
 
        self.max_renames = max_renames
271
 
        self.protocol = protocol
272
 
        self.group = None       # our entry group
273
 
        self.server = None
274
 
        self.bus = bus
275
 
        self.entry_group_state_changed_match = None
276
 
    
277
129
    def rename(self):
278
130
        """Derived from the Avahi example code"""
279
131
        if self.rename_count >= self.max_renames:
280
 
            logger.critical("No suitable Zeroconf service name found"
281
 
                            " after %i retries, exiting.",
282
 
                            self.rename_count)
 
132
            logger.critical(u"No suitable service name found after %i"
 
133
                            u" retries, exiting.", rename_count)
283
134
            raise AvahiServiceError("Too many renames")
284
 
        self.name = unicode(self.server
285
 
                            .GetAlternativeServiceName(self.name))
286
 
        logger.info("Changing Zeroconf service name to %r ...",
287
 
                    self.name)
 
135
        name = server.GetAlternativeServiceName(name)
 
136
        logger.notice(u"Changing name to %r ...", name)
288
137
        self.remove()
289
 
        try:
290
 
            self.add()
291
 
        except dbus.exceptions.DBusException as error:
292
 
            logger.critical("D-Bus Exception", exc_info=error)
293
 
            self.cleanup()
294
 
            os._exit(1)
 
138
        self.add()
295
139
        self.rename_count += 1
296
 
    
297
140
    def remove(self):
298
141
        """Derived from the Avahi example code"""
299
 
        if self.entry_group_state_changed_match is not None:
300
 
            self.entry_group_state_changed_match.remove()
301
 
            self.entry_group_state_changed_match = None
302
 
        if self.group is not None:
303
 
            self.group.Reset()
304
 
    
 
142
        if group is not None:
 
143
            group.Reset()
305
144
    def add(self):
306
145
        """Derived from the Avahi example code"""
307
 
        self.remove()
308
 
        if self.group is None:
309
 
            self.group = dbus.Interface(
310
 
                self.bus.get_object(avahi.DBUS_NAME,
311
 
                                    self.server.EntryGroupNew()),
312
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
313
 
        self.entry_group_state_changed_match = (
314
 
            self.group.connect_to_signal(
315
 
                'StateChanged', self.entry_group_state_changed))
316
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
317
 
                     self.name, self.type)
318
 
        self.group.AddService(
319
 
            self.interface,
320
 
            self.protocol,
321
 
            dbus.UInt32(0),     # flags
322
 
            self.name, self.type,
323
 
            self.domain, self.host,
324
 
            dbus.UInt16(self.port),
325
 
            avahi.string_array_to_txt_array(self.TXT))
326
 
        self.group.Commit()
327
 
    
328
 
    def entry_group_state_changed(self, state, error):
329
 
        """Derived from the Avahi example code"""
330
 
        logger.debug("Avahi entry group state change: %i", state)
331
 
        
332
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
333
 
            logger.debug("Zeroconf service established.")
334
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
335
 
            logger.info("Zeroconf service name collision.")
336
 
            self.rename()
337
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
338
 
            logger.critical("Avahi: Error in group state changed %s",
339
 
                            unicode(error))
340
 
            raise AvahiGroupError("State changed: {0!s}"
341
 
                                  .format(error))
342
 
    
343
 
    def cleanup(self):
344
 
        """Derived from the Avahi example code"""
345
 
        if self.group is not None:
346
 
            try:
347
 
                self.group.Free()
348
 
            except (dbus.exceptions.UnknownMethodException,
349
 
                    dbus.exceptions.DBusException):
350
 
                pass
351
 
            self.group = None
352
 
        self.remove()
353
 
    
354
 
    def server_state_changed(self, state, error=None):
355
 
        """Derived from the Avahi example code"""
356
 
        logger.debug("Avahi server state change: %i", state)
357
 
        bad_states = { avahi.SERVER_INVALID:
358
 
                           "Zeroconf server invalid",
359
 
                       avahi.SERVER_REGISTERING: None,
360
 
                       avahi.SERVER_COLLISION:
361
 
                           "Zeroconf server name collision",
362
 
                       avahi.SERVER_FAILURE:
363
 
                           "Zeroconf server failure" }
364
 
        if state in bad_states:
365
 
            if bad_states[state] is not None:
366
 
                if error is None:
367
 
                    logger.error(bad_states[state])
368
 
                else:
369
 
                    logger.error(bad_states[state] + ": %r", error)
370
 
            self.cleanup()
371
 
        elif state == avahi.SERVER_RUNNING:
372
 
            self.add()
373
 
        else:
374
 
            if error is None:
375
 
                logger.debug("Unknown state: %r", state)
376
 
            else:
377
 
                logger.debug("Unknown state: %r: %r", state, error)
378
 
    
379
 
    def activate(self):
380
 
        """Derived from the Avahi example code"""
381
 
        if self.server is None:
382
 
            self.server = dbus.Interface(
383
 
                self.bus.get_object(avahi.DBUS_NAME,
384
 
                                    avahi.DBUS_PATH_SERVER,
385
 
                                    follow_name_owner_changes=True),
386
 
                avahi.DBUS_INTERFACE_SERVER)
387
 
        self.server.connect_to_signal("StateChanged",
388
 
                                 self.server_state_changed)
389
 
        self.server_state_changed(self.server.GetState())
390
 
 
391
 
 
392
 
class AvahiServiceToSyslog(AvahiService):
393
 
    def rename(self):
394
 
        """Add the new name to the syslog messages"""
395
 
        ret = AvahiService.rename(self)
396
 
        syslogger.setFormatter(logging.Formatter
397
 
                               ('Mandos ({0}) [%(process)d]:'
398
 
                                ' %(levelname)s: %(message)s'
399
 
                                .format(self.name)))
400
 
        return ret
401
 
 
402
 
 
403
 
def timedelta_to_milliseconds(td):
404
 
    "Convert a datetime.timedelta() to milliseconds"
405
 
    return ((td.days * 24 * 60 * 60 * 1000)
406
 
            + (td.seconds * 1000)
407
 
            + (td.microseconds // 1000))
 
146
        global group
 
147
        if group is None:
 
148
            group = dbus.Interface\
 
149
                    (bus.get_object(avahi.DBUS_NAME,
 
150
                                    server.EntryGroupNew()),
 
151
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
152
            group.connect_to_signal('StateChanged',
 
153
                                    entry_group_state_changed)
 
154
        logger.debug(u"Adding service '%s' of type '%s' ...",
 
155
                     service.name, service.type)
 
156
        group.AddService(
 
157
                self.interface,         # interface
 
158
                avahi.PROTO_INET6,      # protocol
 
159
                dbus.UInt32(0),         # flags
 
160
                self.name, self.type,
 
161
                self.domain, self.host,
 
162
                dbus.UInt16(self.port),
 
163
                avahi.string_array_to_txt_array(self.TXT))
 
164
        group.Commit()
 
165
 
 
166
# From the Avahi example code:
 
167
group = None                            # our entry group
 
168
# End of Avahi example code
408
169
 
409
170
 
410
171
class Client(object):
411
172
    """A representation of a client host served by this server.
412
 
    
413
173
    Attributes:
414
 
    approved:   bool(); 'None' if not yet approved/disapproved
415
 
    approval_delay: datetime.timedelta(); Time to wait for approval
416
 
    approval_duration: datetime.timedelta(); Duration of one approval
417
 
    checker:    subprocess.Popen(); a running checker process used
418
 
                                    to see if the client lives.
419
 
                                    'None' if no process is running.
420
 
    checker_callback_tag: a gobject event source tag, or None
421
 
    checker_command: string; External command which is run to check
422
 
                     if client lives.  %() expansions are done at
 
174
    name:      string; from the config file, used in log messages
 
175
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
176
                 uniquely identify the client
 
177
    secret:    bytestring; sent verbatim (over TLS) to client
 
178
    fqdn:      string (FQDN); available for use by the checker command
 
179
    created:   datetime.datetime(); object creation, not client host
 
180
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
181
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
182
                                     until this client is invalid
 
183
    interval:  datetime.timedelta(); How often to start a new checker
 
184
    stop_hook: If set, called by stop() as stop_hook(self)
 
185
    checker:   subprocess.Popen(); a running checker process used
 
186
                                   to see if the client lives.
 
187
                                   'None' if no process is running.
 
188
    checker_initiator_tag: a gobject event source tag, or None
 
189
    stop_initiator_tag:    - '' -
 
190
    checker_callback_tag:  - '' -
 
191
    checker_command: string; External command which is run to check if
 
192
                     client lives.  %() expansions are done at
423
193
                     runtime with vars(self) as dict, so that for
424
194
                     instance %(name)s can be used in the command.
425
 
    checker_initiator_tag: a gobject event source tag, or None
426
 
    created:    datetime.datetime(); (UTC) object creation
427
 
    client_structure: Object describing what attributes a client has
428
 
                      and is used for storing the client at exit
429
 
    current_checker_command: string; current running checker_command
430
 
    disable_initiator_tag: a gobject event source tag, or None
431
 
    enabled:    bool()
432
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
433
 
                 uniquely identify the client
434
 
    host:       string; available for use by the checker command
435
 
    interval:   datetime.timedelta(); How often to start a new checker
436
 
    last_approval_request: datetime.datetime(); (UTC) or None
437
 
    last_checked_ok: datetime.datetime(); (UTC) or None
438
 
    last_checker_status: integer between 0 and 255 reflecting exit
439
 
                         status of last checker. -1 reflects crashed
440
 
                         checker, -2 means no checker completed yet.
441
 
    last_enabled: datetime.datetime(); (UTC) or None
442
 
    name:       string; from the config file, used in log messages and
443
 
                        D-Bus identifiers
444
 
    secret:     bytestring; sent verbatim (over TLS) to client
445
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
446
 
                                      until this client is disabled
447
 
    extended_timeout:   extra long timeout when secret has been sent
448
 
    runtime_expansions: Allowed attributes for runtime expansion.
449
 
    expires:    datetime.datetime(); time (UTC) when a client will be
450
 
                disabled, or None
451
 
    server_settings: The server_settings dict from main()
 
195
    Private attibutes:
 
196
    _timeout: Real variable for 'timeout'
 
197
    _interval: Real variable for 'interval'
 
198
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
199
    _interval_milliseconds: - '' -
452
200
    """
453
 
    
454
 
    runtime_expansions = ("approval_delay", "approval_duration",
455
 
                          "created", "enabled", "expires",
456
 
                          "fingerprint", "host", "interval",
457
 
                          "last_approval_request", "last_checked_ok",
458
 
                          "last_enabled", "name", "timeout")
459
 
    client_defaults = { "timeout": "PT5M",
460
 
                        "extended_timeout": "PT15M",
461
 
                        "interval": "PT2M",
462
 
                        "checker": "fping -q -- %%(host)s",
463
 
                        "host": "",
464
 
                        "approval_delay": "PT0S",
465
 
                        "approval_duration": "PT1S",
466
 
                        "approved_by_default": "True",
467
 
                        "enabled": "True",
468
 
                        }
469
 
    
470
 
    def timeout_milliseconds(self):
471
 
        "Return the 'timeout' attribute in milliseconds"
472
 
        return timedelta_to_milliseconds(self.timeout)
473
 
    
474
 
    def extended_timeout_milliseconds(self):
475
 
        "Return the 'extended_timeout' attribute in milliseconds"
476
 
        return timedelta_to_milliseconds(self.extended_timeout)
477
 
    
478
 
    def interval_milliseconds(self):
479
 
        "Return the 'interval' attribute in milliseconds"
480
 
        return timedelta_to_milliseconds(self.interval)
481
 
    
482
 
    def approval_delay_milliseconds(self):
483
 
        return timedelta_to_milliseconds(self.approval_delay)
484
 
    
485
 
    @staticmethod
486
 
    def config_parser(config):
487
 
        """Construct a new dict of client settings of this form:
488
 
        { client_name: {setting_name: value, ...}, ...}
489
 
        with exceptions for any special settings as defined above.
490
 
        NOTE: Must be a pure function. Must return the same result
491
 
        value given the same arguments.
492
 
        """
493
 
        settings = {}
494
 
        for client_name in config.sections():
495
 
            section = dict(config.items(client_name))
496
 
            client = settings[client_name] = {}
497
 
            
498
 
            client["host"] = section["host"]
499
 
            # Reformat values from string types to Python types
500
 
            client["approved_by_default"] = config.getboolean(
501
 
                client_name, "approved_by_default")
502
 
            client["enabled"] = config.getboolean(client_name,
503
 
                                                  "enabled")
504
 
            
505
 
            client["fingerprint"] = (section["fingerprint"].upper()
506
 
                                     .replace(" ", ""))
507
 
            if "secret" in section:
508
 
                client["secret"] = section["secret"].decode("base64")
509
 
            elif "secfile" in section:
510
 
                with open(os.path.expanduser(os.path.expandvars
511
 
                                             (section["secfile"])),
512
 
                          "rb") as secfile:
513
 
                    client["secret"] = secfile.read()
514
 
            else:
515
 
                raise TypeError("No secret or secfile for section {0}"
516
 
                                .format(section))
517
 
            client["timeout"] = string_to_delta(section["timeout"])
518
 
            client["extended_timeout"] = string_to_delta(
519
 
                section["extended_timeout"])
520
 
            client["interval"] = string_to_delta(section["interval"])
521
 
            client["approval_delay"] = string_to_delta(
522
 
                section["approval_delay"])
523
 
            client["approval_duration"] = string_to_delta(
524
 
                section["approval_duration"])
525
 
            client["checker_command"] = section["checker"]
526
 
            client["last_approval_request"] = None
527
 
            client["last_checked_ok"] = None
528
 
            client["last_checker_status"] = -2
529
 
        
530
 
        return settings
531
 
    
532
 
    def __init__(self, settings, name = None, server_settings=None):
 
201
    def _set_timeout(self, timeout):
 
202
        "Setter function for 'timeout' attribute"
 
203
        self._timeout = timeout
 
204
        self._timeout_milliseconds = ((self.timeout.days
 
205
                                       * 24 * 60 * 60 * 1000)
 
206
                                      + (self.timeout.seconds * 1000)
 
207
                                      + (self.timeout.microseconds
 
208
                                         // 1000))
 
209
    timeout = property(lambda self: self._timeout,
 
210
                       _set_timeout)
 
211
    del _set_timeout
 
212
    def _set_interval(self, interval):
 
213
        "Setter function for 'interval' attribute"
 
214
        self._interval = interval
 
215
        self._interval_milliseconds = ((self.interval.days
 
216
                                        * 24 * 60 * 60 * 1000)
 
217
                                       + (self.interval.seconds
 
218
                                          * 1000)
 
219
                                       + (self.interval.microseconds
 
220
                                          // 1000))
 
221
    interval = property(lambda self: self._interval,
 
222
                        _set_interval)
 
223
    del _set_interval
 
224
    def __init__(self, name=None, stop_hook=None, fingerprint=None,
 
225
                 secret=None, secfile=None, fqdn=None, timeout=None,
 
226
                 interval=-1, checker=None):
 
227
        """Note: the 'checker' argument sets the 'checker_command'
 
228
        attribute and not the 'checker' attribute.."""
533
229
        self.name = name
534
 
        if server_settings is None:
535
 
            server_settings = {}
536
 
        self.server_settings = server_settings
537
 
        # adding all client settings
538
 
        for setting, value in settings.iteritems():
539
 
            setattr(self, setting, value)
540
 
        
541
 
        if self.enabled:
542
 
            if not hasattr(self, "last_enabled"):
543
 
                self.last_enabled = datetime.datetime.utcnow()
544
 
            if not hasattr(self, "expires"):
545
 
                self.expires = (datetime.datetime.utcnow()
546
 
                                + self.timeout)
 
230
        logger.debug(u"Creating client %r", self.name)
 
231
        # Uppercase and remove spaces from fingerprint
 
232
        # for later comparison purposes with return value of
 
233
        # the fingerprint() function
 
234
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
 
235
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
 
236
        if secret:
 
237
            self.secret = secret.decode(u"base64")
 
238
        elif secfile:
 
239
            sf = open(secfile)
 
240
            self.secret = sf.read()
 
241
            sf.close()
547
242
        else:
548
 
            self.last_enabled = None
549
 
            self.expires = None
550
 
        
551
 
        logger.debug("Creating client %r", self.name)
552
 
        # Uppercase and remove spaces from fingerprint for later
553
 
        # comparison purposes with return value from the fingerprint()
554
 
        # function
555
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
556
 
        self.created = settings.get("created",
557
 
                                    datetime.datetime.utcnow())
558
 
        
559
 
        # attributes specific for this server instance
 
243
            raise TypeError(u"No secret or secfile for client %s"
 
244
                            % self.name)
 
245
        self.fqdn = fqdn
 
246
        self.created = datetime.datetime.now()
 
247
        self.last_checked_ok = None
 
248
        self.timeout = string_to_delta(timeout)
 
249
        self.interval = string_to_delta(interval)
 
250
        self.stop_hook = stop_hook
560
251
        self.checker = None
561
252
        self.checker_initiator_tag = None
562
 
        self.disable_initiator_tag = None
 
253
        self.stop_initiator_tag = None
563
254
        self.checker_callback_tag = None
564
 
        self.current_checker_command = None
565
 
        self.approved = None
566
 
        self.approvals_pending = 0
567
 
        self.changedstate = (multiprocessing_manager
568
 
                             .Condition(multiprocessing_manager
569
 
                                        .Lock()))
570
 
        self.client_structure = [attr for attr in
571
 
                                 self.__dict__.iterkeys()
572
 
                                 if not attr.startswith("_")]
573
 
        self.client_structure.append("client_structure")
574
 
        
575
 
        for name, t in inspect.getmembers(type(self),
576
 
                                          lambda obj:
577
 
                                              isinstance(obj,
578
 
                                                         property)):
579
 
            if not name.startswith("_"):
580
 
                self.client_structure.append(name)
581
 
    
582
 
    # Send notice to process children that client state has changed
583
 
    def send_changedstate(self):
584
 
        with self.changedstate:
585
 
            self.changedstate.notify_all()
586
 
    
587
 
    def enable(self):
 
255
        self.check_command = checker
 
256
    def start(self):
588
257
        """Start this client's checker and timeout hooks"""
589
 
        if getattr(self, "enabled", False):
590
 
            # Already enabled
591
 
            return
592
 
        self.expires = datetime.datetime.utcnow() + self.timeout
593
 
        self.enabled = True
594
 
        self.last_enabled = datetime.datetime.utcnow()
595
 
        self.init_checker()
596
 
        self.send_changedstate()
597
 
    
598
 
    def disable(self, quiet=True):
599
 
        """Disable this client."""
600
 
        if not getattr(self, "enabled", False):
601
 
            return False
602
 
        if not quiet:
603
 
            logger.info("Disabling client %s", self.name)
604
 
        if getattr(self, "disable_initiator_tag", None) is not None:
605
 
            gobject.source_remove(self.disable_initiator_tag)
606
 
            self.disable_initiator_tag = None
607
 
        self.expires = None
608
 
        if getattr(self, "checker_initiator_tag", None) is not None:
609
 
            gobject.source_remove(self.checker_initiator_tag)
610
 
            self.checker_initiator_tag = None
611
 
        self.stop_checker()
612
 
        self.enabled = False
613
 
        if not quiet:
614
 
            self.send_changedstate()
615
 
        # Do not run this again if called by a gobject.timeout_add
616
 
        return False
617
 
    
618
 
    def __del__(self):
619
 
        self.disable()
620
 
    
621
 
    def init_checker(self):
622
258
        # Schedule a new checker to be started an 'interval' from now,
623
259
        # and every interval from then on.
624
 
        if self.checker_initiator_tag is not None:
625
 
            gobject.source_remove(self.checker_initiator_tag)
626
 
        self.checker_initiator_tag = (gobject.timeout_add
627
 
                                      (self.interval_milliseconds(),
628
 
                                       self.start_checker))
629
 
        # Schedule a disable() when 'timeout' has passed
630
 
        if self.disable_initiator_tag is not None:
631
 
            gobject.source_remove(self.disable_initiator_tag)
632
 
        self.disable_initiator_tag = (gobject.timeout_add
633
 
                                   (self.timeout_milliseconds(),
634
 
                                    self.disable))
 
260
        self.checker_initiator_tag = gobject.timeout_add\
 
261
                                     (self._interval_milliseconds,
 
262
                                      self.start_checker)
635
263
        # Also start a new checker *right now*.
636
264
        self.start_checker()
637
 
    
638
 
    def checker_callback(self, pid, condition, command):
 
265
        # Schedule a stop() when 'timeout' has passed
 
266
        self.stop_initiator_tag = gobject.timeout_add\
 
267
                                  (self._timeout_milliseconds,
 
268
                                   self.stop)
 
269
    def stop(self):
 
270
        """Stop this client.
 
271
        The possibility that a client might be restarted is left open,
 
272
        but not currently used."""
 
273
        # If this client doesn't have a secret, it is already stopped.
 
274
        if self.secret:
 
275
            logger.debug(u"Stopping client %s", self.name)
 
276
            self.secret = None
 
277
        else:
 
278
            return False
 
279
        if getattr(self, "stop_initiator_tag", False):
 
280
            gobject.source_remove(self.stop_initiator_tag)
 
281
            self.stop_initiator_tag = None
 
282
        if getattr(self, "checker_initiator_tag", False):
 
283
            gobject.source_remove(self.checker_initiator_tag)
 
284
            self.checker_initiator_tag = None
 
285
        self.stop_checker()
 
286
        if self.stop_hook:
 
287
            self.stop_hook(self)
 
288
        # Do not run this again if called by a gobject.timeout_add
 
289
        return False
 
290
    def __del__(self):
 
291
        self.stop_hook = None
 
292
        self.stop()
 
293
    def checker_callback(self, pid, condition):
639
294
        """The checker has completed, so take appropriate actions."""
 
295
        now = datetime.datetime.now()
640
296
        self.checker_callback_tag = None
641
297
        self.checker = None
642
 
        if os.WIFEXITED(condition):
643
 
            self.last_checker_status = os.WEXITSTATUS(condition)
644
 
            if self.last_checker_status == 0:
645
 
                logger.info("Checker for %(name)s succeeded",
646
 
                            vars(self))
647
 
                self.checked_ok()
648
 
            else:
649
 
                logger.info("Checker for %(name)s failed",
650
 
                            vars(self))
651
 
        else:
652
 
            self.last_checker_status = -1
653
 
            logger.warning("Checker for %(name)s crashed?",
 
298
        if os.WIFEXITED(condition) \
 
299
               and (os.WEXITSTATUS(condition) == 0):
 
300
            logger.debug(u"Checker for %(name)s succeeded",
 
301
                         vars(self))
 
302
            self.last_checked_ok = now
 
303
            gobject.source_remove(self.stop_initiator_tag)
 
304
            self.stop_initiator_tag = gobject.timeout_add\
 
305
                                      (self._timeout_milliseconds,
 
306
                                       self.stop)
 
307
        elif not os.WIFEXITED(condition):
 
308
            logger.warning(u"Checker for %(name)s crashed?",
654
309
                           vars(self))
655
 
    
656
 
    def checked_ok(self):
657
 
        """Assert that the client has been seen, alive and well."""
658
 
        self.last_checked_ok = datetime.datetime.utcnow()
659
 
        self.last_checker_status = 0
660
 
        self.bump_timeout()
661
 
    
662
 
    def bump_timeout(self, timeout=None):
663
 
        """Bump up the timeout for this client."""
664
 
        if timeout is None:
665
 
            timeout = self.timeout
666
 
        if self.disable_initiator_tag is not None:
667
 
            gobject.source_remove(self.disable_initiator_tag)
668
 
            self.disable_initiator_tag = None
669
 
        if getattr(self, "enabled", False):
670
 
            self.disable_initiator_tag = (gobject.timeout_add
671
 
                                          (timedelta_to_milliseconds
672
 
                                           (timeout), self.disable))
673
 
            self.expires = datetime.datetime.utcnow() + timeout
674
 
    
675
 
    def need_approval(self):
676
 
        self.last_approval_request = datetime.datetime.utcnow()
677
 
    
 
310
        else:
 
311
            logger.debug(u"Checker for %(name)s failed",
 
312
                         vars(self))
678
313
    def start_checker(self):
679
314
        """Start a new checker subprocess if one is not running.
680
 
        
681
315
        If a checker already exists, leave it running and do
682
316
        nothing."""
683
317
        # The reason for not killing a running checker is that if we
684
 
        # did that, and if a checker (for some reason) started running
685
 
        # slowly and taking more than 'interval' time, then the client
686
 
        # would inevitably timeout, since no checker would get a
687
 
        # chance to run to completion.  If we instead leave running
 
318
        # did that, then if a checker (for some reason) started
 
319
        # running slowly and taking more than 'interval' time, the
 
320
        # client would inevitably timeout, since no checker would get
 
321
        # a chance to run to completion.  If we instead leave running
688
322
        # checkers alone, the checker would have to take more time
689
 
        # than 'timeout' for the client to be disabled, which is as it
690
 
        # should be.
691
 
        
692
 
        # If a checker exists, make sure it is not a zombie
693
 
        try:
694
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
695
 
        except AttributeError:
696
 
            pass
697
 
        except OSError as error:
698
 
            if error.errno != errno.ECHILD:
699
 
                raise
700
 
        else:
701
 
            if pid:
702
 
                logger.warning("Checker was a zombie")
703
 
                gobject.source_remove(self.checker_callback_tag)
704
 
                self.checker_callback(pid, status,
705
 
                                      self.current_checker_command)
706
 
        # Start a new checker if needed
 
323
        # than 'timeout' for the client to be declared invalid, which
 
324
        # is as it should be.
707
325
        if self.checker is None:
708
 
            # Escape attributes for the shell
709
 
            escaped_attrs = dict(
710
 
                (attr, re.escape(unicode(getattr(self, attr))))
711
 
                for attr in
712
 
                self.runtime_expansions)
713
 
            try:
714
 
                command = self.checker_command % escaped_attrs
715
 
            except TypeError as error:
716
 
                logger.error('Could not format string "%s"',
717
 
                             self.checker_command, exc_info=error)
718
 
                return True # Try again later
719
 
            self.current_checker_command = command
720
 
            try:
721
 
                logger.info("Starting checker %r for %s",
722
 
                            command, self.name)
723
 
                # We don't need to redirect stdout and stderr, since
724
 
                # in normal mode, that is already done by daemon(),
725
 
                # and in debug mode we don't want to.  (Stdin is
726
 
                # always replaced by /dev/null.)
727
 
                # The exception is when not debugging but nevertheless
728
 
                # running in the foreground; use the previously
729
 
                # created wnull.
730
 
                popen_args = {}
731
 
                if (not self.server_settings["debug"]
732
 
                    and self.server_settings["foreground"]):
733
 
                    popen_args.update({"stdout": wnull,
734
 
                                       "stderr": wnull })
 
326
            try:
 
327
                # In case check_command has exactly one % operator
 
328
                command = self.check_command % self.fqdn
 
329
            except TypeError:
 
330
                # Escape attributes for the shell
 
331
                escaped_attrs = dict((key, re.escape(str(val)))
 
332
                                     for key, val in
 
333
                                     vars(self).iteritems())
 
334
                try:
 
335
                    command = self.check_command % escaped_attrs
 
336
                except TypeError, error:
 
337
                    logger.error(u'Could not format string "%s":'
 
338
                                 u' %s', self.check_command, error)
 
339
                    return True # Try again later
 
340
            try:
 
341
                logger.debug(u"Starting checker %r for %s",
 
342
                             command, self.name)
735
343
                self.checker = subprocess.Popen(command,
736
344
                                                close_fds=True,
737
 
                                                shell=True, cwd="/",
738
 
                                                **popen_args)
739
 
            except OSError as error:
740
 
                logger.error("Failed to start subprocess",
741
 
                             exc_info=error)
742
 
                return True
743
 
            self.checker_callback_tag = (gobject.child_watch_add
744
 
                                         (self.checker.pid,
745
 
                                          self.checker_callback,
746
 
                                          data=command))
747
 
            # The checker may have completed before the gobject
748
 
            # watch was added.  Check for this.
749
 
            try:
750
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
751
 
            except OSError as error:
752
 
                if error.errno == errno.ECHILD:
753
 
                    # This should never happen
754
 
                    logger.error("Child process vanished",
755
 
                                 exc_info=error)
756
 
                    return True
757
 
                raise
758
 
            if pid:
759
 
                gobject.source_remove(self.checker_callback_tag)
760
 
                self.checker_callback(pid, status, command)
 
345
                                                shell=True, cwd="/")
 
346
                self.checker_callback_tag = gobject.child_watch_add\
 
347
                                            (self.checker.pid,
 
348
                                             self.checker_callback)
 
349
            except subprocess.OSError, error:
 
350
                logger.error(u"Failed to start subprocess: %s",
 
351
                             error)
761
352
        # Re-run this periodically if run by gobject.timeout_add
762
353
        return True
763
 
    
764
354
    def stop_checker(self):
765
355
        """Force the checker process, if any, to stop."""
766
356
        if self.checker_callback_tag:
770
360
            return
771
361
        logger.debug("Stopping checker for %(name)s", vars(self))
772
362
        try:
773
 
            self.checker.terminate()
774
 
            #time.sleep(0.5)
 
363
            os.kill(self.checker.pid, signal.SIGTERM)
 
364
            #os.sleep(0.5)
775
365
            #if self.checker.poll() is None:
776
 
            #    self.checker.kill()
777
 
        except OSError as error:
 
366
            #    os.kill(self.checker.pid, signal.SIGKILL)
 
367
        except OSError, error:
778
368
            if error.errno != errno.ESRCH: # No such process
779
369
                raise
780
370
        self.checker = None
781
 
 
782
 
 
783
 
def dbus_service_property(dbus_interface, signature="v",
784
 
                          access="readwrite", byte_arrays=False):
785
 
    """Decorators for marking methods of a DBusObjectWithProperties to
786
 
    become properties on the D-Bus.
787
 
    
788
 
    The decorated method will be called with no arguments by "Get"
789
 
    and with one argument by "Set".
790
 
    
791
 
    The parameters, where they are supported, are the same as
792
 
    dbus.service.method, except there is only "signature", since the
793
 
    type from Get() and the type sent to Set() is the same.
794
 
    """
795
 
    # Encoding deeply encoded byte arrays is not supported yet by the
796
 
    # "Set" method, so we fail early here:
797
 
    if byte_arrays and signature != "ay":
798
 
        raise ValueError("Byte arrays not supported for non-'ay'"
799
 
                         " signature {0!r}".format(signature))
800
 
    def decorator(func):
801
 
        func._dbus_is_property = True
802
 
        func._dbus_interface = dbus_interface
803
 
        func._dbus_signature = signature
804
 
        func._dbus_access = access
805
 
        func._dbus_name = func.__name__
806
 
        if func._dbus_name.endswith("_dbus_property"):
807
 
            func._dbus_name = func._dbus_name[:-14]
808
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
809
 
        return func
810
 
    return decorator
811
 
 
812
 
 
813
 
def dbus_interface_annotations(dbus_interface):
814
 
    """Decorator for marking functions returning interface annotations
815
 
    
816
 
    Usage:
817
 
    
818
 
    @dbus_interface_annotations("org.example.Interface")
819
 
    def _foo(self):  # Function name does not matter
820
 
        return {"org.freedesktop.DBus.Deprecated": "true",
821
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
822
 
                    "false"}
823
 
    """
824
 
    def decorator(func):
825
 
        func._dbus_is_interface = True
826
 
        func._dbus_interface = dbus_interface
827
 
        func._dbus_name = dbus_interface
828
 
        return func
829
 
    return decorator
830
 
 
831
 
 
832
 
def dbus_annotations(annotations):
833
 
    """Decorator to annotate D-Bus methods, signals or properties
834
 
    Usage:
835
 
    
836
 
    @dbus_service_property("org.example.Interface", signature="b",
837
 
                           access="r")
838
 
    @dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
839
 
                        "org.freedesktop.DBus.Property."
840
 
                        "EmitsChangedSignal": "false"})
841
 
    def Property_dbus_property(self):
842
 
        return dbus.Boolean(False)
843
 
    """
844
 
    def decorator(func):
845
 
        func._dbus_annotations = annotations
846
 
        return func
847
 
    return decorator
848
 
 
849
 
 
850
 
class DBusPropertyException(dbus.exceptions.DBusException):
851
 
    """A base class for D-Bus property-related exceptions
852
 
    """
853
 
    def __unicode__(self):
854
 
        return unicode(str(self))
855
 
 
856
 
 
857
 
class DBusPropertyAccessException(DBusPropertyException):
858
 
    """A property's access permissions disallows an operation.
859
 
    """
860
 
    pass
861
 
 
862
 
 
863
 
class DBusPropertyNotFound(DBusPropertyException):
864
 
    """An attempt was made to access a non-existing property.
865
 
    """
866
 
    pass
867
 
 
868
 
 
869
 
class DBusObjectWithProperties(dbus.service.Object):
870
 
    """A D-Bus object with properties.
871
 
    
872
 
    Classes inheriting from this can use the dbus_service_property
873
 
    decorator to expose methods as D-Bus properties.  It exposes the
874
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
875
 
    """
876
 
    
877
 
    @staticmethod
878
 
    def _is_dbus_thing(thing):
879
 
        """Returns a function testing if an attribute is a D-Bus thing
880
 
        
881
 
        If called like _is_dbus_thing("method") it returns a function
882
 
        suitable for use as predicate to inspect.getmembers().
883
 
        """
884
 
        return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
885
 
                                   False)
886
 
    
887
 
    def _get_all_dbus_things(self, thing):
888
 
        """Returns a generator of (name, attribute) pairs
889
 
        """
890
 
        return ((getattr(athing.__get__(self), "_dbus_name",
891
 
                         name),
892
 
                 athing.__get__(self))
893
 
                for cls in self.__class__.__mro__
894
 
                for name, athing in
895
 
                inspect.getmembers(cls,
896
 
                                   self._is_dbus_thing(thing)))
897
 
    
898
 
    def _get_dbus_property(self, interface_name, property_name):
899
 
        """Returns a bound method if one exists which is a D-Bus
900
 
        property with the specified name and interface.
901
 
        """
902
 
        for cls in  self.__class__.__mro__:
903
 
            for name, value in (inspect.getmembers
904
 
                                (cls,
905
 
                                 self._is_dbus_thing("property"))):
906
 
                if (value._dbus_name == property_name
907
 
                    and value._dbus_interface == interface_name):
908
 
                    return value.__get__(self)
909
 
        
910
 
        # No such property
911
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
912
 
                                   + interface_name + "."
913
 
                                   + property_name)
914
 
    
915
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
916
 
                         out_signature="v")
917
 
    def Get(self, interface_name, property_name):
918
 
        """Standard D-Bus property Get() method, see D-Bus standard.
919
 
        """
920
 
        prop = self._get_dbus_property(interface_name, property_name)
921
 
        if prop._dbus_access == "write":
922
 
            raise DBusPropertyAccessException(property_name)
923
 
        value = prop()
924
 
        if not hasattr(value, "variant_level"):
925
 
            return value
926
 
        return type(value)(value, variant_level=value.variant_level+1)
927
 
    
928
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
929
 
    def Set(self, interface_name, property_name, value):
930
 
        """Standard D-Bus property Set() method, see D-Bus standard.
931
 
        """
932
 
        prop = self._get_dbus_property(interface_name, property_name)
933
 
        if prop._dbus_access == "read":
934
 
            raise DBusPropertyAccessException(property_name)
935
 
        if prop._dbus_get_args_options["byte_arrays"]:
936
 
            # The byte_arrays option is not supported yet on
937
 
            # signatures other than "ay".
938
 
            if prop._dbus_signature != "ay":
939
 
                raise ValueError("Byte arrays not supported for non-"
940
 
                                 "'ay' signature {0!r}"
941
 
                                 .format(prop._dbus_signature))
942
 
            value = dbus.ByteArray(b''.join(chr(byte)
943
 
                                            for byte in value))
944
 
        prop(value)
945
 
    
946
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
947
 
                         out_signature="a{sv}")
948
 
    def GetAll(self, interface_name):
949
 
        """Standard D-Bus property GetAll() method, see D-Bus
950
 
        standard.
951
 
        
952
 
        Note: Will not include properties with access="write".
953
 
        """
954
 
        properties = {}
955
 
        for name, prop in self._get_all_dbus_things("property"):
956
 
            if (interface_name
957
 
                and interface_name != prop._dbus_interface):
958
 
                # Interface non-empty but did not match
959
 
                continue
960
 
            # Ignore write-only properties
961
 
            if prop._dbus_access == "write":
962
 
                continue
963
 
            value = prop()
964
 
            if not hasattr(value, "variant_level"):
965
 
                properties[name] = value
966
 
                continue
967
 
            properties[name] = type(value)(value, variant_level=
968
 
                                           value.variant_level+1)
969
 
        return dbus.Dictionary(properties, signature="sv")
970
 
    
971
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
972
 
                         out_signature="s",
973
 
                         path_keyword='object_path',
974
 
                         connection_keyword='connection')
975
 
    def Introspect(self, object_path, connection):
976
 
        """Overloading of standard D-Bus method.
977
 
        
978
 
        Inserts property tags and interface annotation tags.
979
 
        """
980
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
981
 
                                                   connection)
982
 
        try:
983
 
            document = xml.dom.minidom.parseString(xmlstring)
984
 
            def make_tag(document, name, prop):
985
 
                e = document.createElement("property")
986
 
                e.setAttribute("name", name)
987
 
                e.setAttribute("type", prop._dbus_signature)
988
 
                e.setAttribute("access", prop._dbus_access)
989
 
                return e
990
 
            for if_tag in document.getElementsByTagName("interface"):
991
 
                # Add property tags
992
 
                for tag in (make_tag(document, name, prop)
993
 
                            for name, prop
994
 
                            in self._get_all_dbus_things("property")
995
 
                            if prop._dbus_interface
996
 
                            == if_tag.getAttribute("name")):
997
 
                    if_tag.appendChild(tag)
998
 
                # Add annotation tags
999
 
                for typ in ("method", "signal", "property"):
1000
 
                    for tag in if_tag.getElementsByTagName(typ):
1001
 
                        annots = dict()
1002
 
                        for name, prop in (self.
1003
 
                                           _get_all_dbus_things(typ)):
1004
 
                            if (name == tag.getAttribute("name")
1005
 
                                and prop._dbus_interface
1006
 
                                == if_tag.getAttribute("name")):
1007
 
                                annots.update(getattr
1008
 
                                              (prop,
1009
 
                                               "_dbus_annotations",
1010
 
                                               {}))
1011
 
                        for name, value in annots.iteritems():
1012
 
                            ann_tag = document.createElement(
1013
 
                                "annotation")
1014
 
                            ann_tag.setAttribute("name", name)
1015
 
                            ann_tag.setAttribute("value", value)
1016
 
                            tag.appendChild(ann_tag)
1017
 
                # Add interface annotation tags
1018
 
                for annotation, value in dict(
1019
 
                    itertools.chain.from_iterable(
1020
 
                        annotations().iteritems()
1021
 
                        for name, annotations in
1022
 
                        self._get_all_dbus_things("interface")
1023
 
                        if name == if_tag.getAttribute("name")
1024
 
                        )).iteritems():
1025
 
                    ann_tag = document.createElement("annotation")
1026
 
                    ann_tag.setAttribute("name", annotation)
1027
 
                    ann_tag.setAttribute("value", value)
1028
 
                    if_tag.appendChild(ann_tag)
1029
 
                # Add the names to the return values for the
1030
 
                # "org.freedesktop.DBus.Properties" methods
1031
 
                if (if_tag.getAttribute("name")
1032
 
                    == "org.freedesktop.DBus.Properties"):
1033
 
                    for cn in if_tag.getElementsByTagName("method"):
1034
 
                        if cn.getAttribute("name") == "Get":
1035
 
                            for arg in cn.getElementsByTagName("arg"):
1036
 
                                if (arg.getAttribute("direction")
1037
 
                                    == "out"):
1038
 
                                    arg.setAttribute("name", "value")
1039
 
                        elif cn.getAttribute("name") == "GetAll":
1040
 
                            for arg in cn.getElementsByTagName("arg"):
1041
 
                                if (arg.getAttribute("direction")
1042
 
                                    == "out"):
1043
 
                                    arg.setAttribute("name", "props")
1044
 
            xmlstring = document.toxml("utf-8")
1045
 
            document.unlink()
1046
 
        except (AttributeError, xml.dom.DOMException,
1047
 
                xml.parsers.expat.ExpatError) as error:
1048
 
            logger.error("Failed to override Introspection method",
1049
 
                         exc_info=error)
1050
 
        return xmlstring
1051
 
 
1052
 
 
1053
 
def datetime_to_dbus(dt, variant_level=0):
1054
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1055
 
    if dt is None:
1056
 
        return dbus.String("", variant_level = variant_level)
1057
 
    return dbus.String(dt.isoformat(),
1058
 
                       variant_level=variant_level)
1059
 
 
1060
 
 
1061
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1062
 
    """A class decorator; applied to a subclass of
1063
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1064
 
    interface names according to the "alt_interface_names" mapping.
1065
 
    Usage:
1066
 
    
1067
 
    @alternate_dbus_interfaces({"org.example.Interface":
1068
 
                                    "net.example.AlternateInterface"})
1069
 
    class SampleDBusObject(dbus.service.Object):
1070
 
        @dbus.service.method("org.example.Interface")
1071
 
        def SampleDBusMethod():
1072
 
            pass
1073
 
    
1074
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1075
 
    reachable via two interfaces: "org.example.Interface" and
1076
 
    "net.example.AlternateInterface", the latter of which will have
1077
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1078
 
    "true", unless "deprecate" is passed with a False value.
1079
 
    
1080
 
    This works for methods and signals, and also for D-Bus properties
1081
 
    (from DBusObjectWithProperties) and interfaces (from the
1082
 
    dbus_interface_annotations decorator).
1083
 
    """
1084
 
    def wrapper(cls):
1085
 
        for orig_interface_name, alt_interface_name in (
1086
 
            alt_interface_names.iteritems()):
1087
 
            attr = {}
1088
 
            interface_names = set()
1089
 
            # Go though all attributes of the class
1090
 
            for attrname, attribute in inspect.getmembers(cls):
1091
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1092
 
                # with the wrong interface name
1093
 
                if (not hasattr(attribute, "_dbus_interface")
1094
 
                    or not attribute._dbus_interface
1095
 
                    .startswith(orig_interface_name)):
1096
 
                    continue
1097
 
                # Create an alternate D-Bus interface name based on
1098
 
                # the current name
1099
 
                alt_interface = (attribute._dbus_interface
1100
 
                                 .replace(orig_interface_name,
1101
 
                                          alt_interface_name))
1102
 
                interface_names.add(alt_interface)
1103
 
                # Is this a D-Bus signal?
1104
 
                if getattr(attribute, "_dbus_is_signal", False):
1105
 
                    # Extract the original non-method undecorated
1106
 
                    # function by black magic
1107
 
                    nonmethod_func = (dict(
1108
 
                            zip(attribute.func_code.co_freevars,
1109
 
                                attribute.__closure__))["func"]
1110
 
                                      .cell_contents)
1111
 
                    # Create a new, but exactly alike, function
1112
 
                    # object, and decorate it to be a new D-Bus signal
1113
 
                    # with the alternate D-Bus interface name
1114
 
                    new_function = (dbus.service.signal
1115
 
                                    (alt_interface,
1116
 
                                     attribute._dbus_signature)
1117
 
                                    (types.FunctionType(
1118
 
                                nonmethod_func.func_code,
1119
 
                                nonmethod_func.func_globals,
1120
 
                                nonmethod_func.func_name,
1121
 
                                nonmethod_func.func_defaults,
1122
 
                                nonmethod_func.func_closure)))
1123
 
                    # Copy annotations, if any
1124
 
                    try:
1125
 
                        new_function._dbus_annotations = (
1126
 
                            dict(attribute._dbus_annotations))
1127
 
                    except AttributeError:
1128
 
                        pass
1129
 
                    # Define a creator of a function to call both the
1130
 
                    # original and alternate functions, so both the
1131
 
                    # original and alternate signals gets sent when
1132
 
                    # the function is called
1133
 
                    def fixscope(func1, func2):
1134
 
                        """This function is a scope container to pass
1135
 
                        func1 and func2 to the "call_both" function
1136
 
                        outside of its arguments"""
1137
 
                        def call_both(*args, **kwargs):
1138
 
                            """This function will emit two D-Bus
1139
 
                            signals by calling func1 and func2"""
1140
 
                            func1(*args, **kwargs)
1141
 
                            func2(*args, **kwargs)
1142
 
                        return call_both
1143
 
                    # Create the "call_both" function and add it to
1144
 
                    # the class
1145
 
                    attr[attrname] = fixscope(attribute, new_function)
1146
 
                # Is this a D-Bus method?
1147
 
                elif getattr(attribute, "_dbus_is_method", False):
1148
 
                    # Create a new, but exactly alike, function
1149
 
                    # object.  Decorate it to be a new D-Bus method
1150
 
                    # with the alternate D-Bus interface name.  Add it
1151
 
                    # to the class.
1152
 
                    attr[attrname] = (dbus.service.method
1153
 
                                      (alt_interface,
1154
 
                                       attribute._dbus_in_signature,
1155
 
                                       attribute._dbus_out_signature)
1156
 
                                      (types.FunctionType
1157
 
                                       (attribute.func_code,
1158
 
                                        attribute.func_globals,
1159
 
                                        attribute.func_name,
1160
 
                                        attribute.func_defaults,
1161
 
                                        attribute.func_closure)))
1162
 
                    # Copy annotations, if any
1163
 
                    try:
1164
 
                        attr[attrname]._dbus_annotations = (
1165
 
                            dict(attribute._dbus_annotations))
1166
 
                    except AttributeError:
1167
 
                        pass
1168
 
                # Is this a D-Bus property?
1169
 
                elif getattr(attribute, "_dbus_is_property", False):
1170
 
                    # Create a new, but exactly alike, function
1171
 
                    # object, and decorate it to be a new D-Bus
1172
 
                    # property with the alternate D-Bus interface
1173
 
                    # name.  Add it to the class.
1174
 
                    attr[attrname] = (dbus_service_property
1175
 
                                      (alt_interface,
1176
 
                                       attribute._dbus_signature,
1177
 
                                       attribute._dbus_access,
1178
 
                                       attribute
1179
 
                                       ._dbus_get_args_options
1180
 
                                       ["byte_arrays"])
1181
 
                                      (types.FunctionType
1182
 
                                       (attribute.func_code,
1183
 
                                        attribute.func_globals,
1184
 
                                        attribute.func_name,
1185
 
                                        attribute.func_defaults,
1186
 
                                        attribute.func_closure)))
1187
 
                    # Copy annotations, if any
1188
 
                    try:
1189
 
                        attr[attrname]._dbus_annotations = (
1190
 
                            dict(attribute._dbus_annotations))
1191
 
                    except AttributeError:
1192
 
                        pass
1193
 
                # Is this a D-Bus interface?
1194
 
                elif getattr(attribute, "_dbus_is_interface", False):
1195
 
                    # Create a new, but exactly alike, function
1196
 
                    # object.  Decorate it to be a new D-Bus interface
1197
 
                    # with the alternate D-Bus interface name.  Add it
1198
 
                    # to the class.
1199
 
                    attr[attrname] = (dbus_interface_annotations
1200
 
                                      (alt_interface)
1201
 
                                      (types.FunctionType
1202
 
                                       (attribute.func_code,
1203
 
                                        attribute.func_globals,
1204
 
                                        attribute.func_name,
1205
 
                                        attribute.func_defaults,
1206
 
                                        attribute.func_closure)))
1207
 
            if deprecate:
1208
 
                # Deprecate all alternate interfaces
1209
 
                iname="_AlternateDBusNames_interface_annotation{0}"
1210
 
                for interface_name in interface_names:
1211
 
                    @dbus_interface_annotations(interface_name)
1212
 
                    def func(self):
1213
 
                        return { "org.freedesktop.DBus.Deprecated":
1214
 
                                     "true" }
1215
 
                    # Find an unused name
1216
 
                    for aname in (iname.format(i)
1217
 
                                  for i in itertools.count()):
1218
 
                        if aname not in attr:
1219
 
                            attr[aname] = func
1220
 
                            break
1221
 
            if interface_names:
1222
 
                # Replace the class with a new subclass of it with
1223
 
                # methods, signals, etc. as created above.
1224
 
                cls = type(b"{0}Alternate".format(cls.__name__),
1225
 
                           (cls,), attr)
1226
 
        return cls
1227
 
    return wrapper
1228
 
 
1229
 
 
1230
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1231
 
                                "se.bsnet.fukt.Mandos"})
1232
 
class ClientDBus(Client, DBusObjectWithProperties):
1233
 
    """A Client class using D-Bus
1234
 
    
1235
 
    Attributes:
1236
 
    dbus_object_path: dbus.ObjectPath
1237
 
    bus: dbus.SystemBus()
1238
 
    """
1239
 
    
1240
 
    runtime_expansions = (Client.runtime_expansions
1241
 
                          + ("dbus_object_path",))
1242
 
    
1243
 
    # dbus.service.Object doesn't use super(), so we can't either.
1244
 
    
1245
 
    def __init__(self, bus = None, *args, **kwargs):
1246
 
        self.bus = bus
1247
 
        Client.__init__(self, *args, **kwargs)
1248
 
        # Only now, when this client is initialized, can it show up on
1249
 
        # the D-Bus
1250
 
        client_object_name = unicode(self.name).translate(
1251
 
            {ord("."): ord("_"),
1252
 
             ord("-"): ord("_")})
1253
 
        self.dbus_object_path = (dbus.ObjectPath
1254
 
                                 ("/clients/" + client_object_name))
1255
 
        DBusObjectWithProperties.__init__(self, self.bus,
1256
 
                                          self.dbus_object_path)
1257
 
    
1258
 
    def notifychangeproperty(transform_func,
1259
 
                             dbus_name, type_func=lambda x: x,
1260
 
                             variant_level=1):
1261
 
        """ Modify a variable so that it's a property which announces
1262
 
        its changes to DBus.
1263
 
        
1264
 
        transform_fun: Function that takes a value and a variant_level
1265
 
                       and transforms it to a D-Bus type.
1266
 
        dbus_name: D-Bus name of the variable
1267
 
        type_func: Function that transform the value before sending it
1268
 
                   to the D-Bus.  Default: no transform
1269
 
        variant_level: D-Bus variant level.  Default: 1
1270
 
        """
1271
 
        attrname = "_{0}".format(dbus_name)
1272
 
        def setter(self, value):
1273
 
            if hasattr(self, "dbus_object_path"):
1274
 
                if (not hasattr(self, attrname) or
1275
 
                    type_func(getattr(self, attrname, None))
1276
 
                    != type_func(value)):
1277
 
                    dbus_value = transform_func(type_func(value),
1278
 
                                                variant_level
1279
 
                                                =variant_level)
1280
 
                    self.PropertyChanged(dbus.String(dbus_name),
1281
 
                                         dbus_value)
1282
 
            setattr(self, attrname, value)
1283
 
        
1284
 
        return property(lambda self: getattr(self, attrname), setter)
1285
 
    
1286
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1287
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1288
 
                                             "ApprovalPending",
1289
 
                                             type_func = bool)
1290
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1291
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1292
 
                                        "LastEnabled")
1293
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1294
 
                                   type_func = lambda checker:
1295
 
                                       checker is not None)
1296
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1297
 
                                           "LastCheckedOK")
1298
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1299
 
                                               "LastCheckerStatus")
1300
 
    last_approval_request = notifychangeproperty(
1301
 
        datetime_to_dbus, "LastApprovalRequest")
1302
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1303
 
                                               "ApprovedByDefault")
1304
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1305
 
                                          "ApprovalDelay",
1306
 
                                          type_func =
1307
 
                                          timedelta_to_milliseconds)
1308
 
    approval_duration = notifychangeproperty(
1309
 
        dbus.UInt64, "ApprovalDuration",
1310
 
        type_func = timedelta_to_milliseconds)
1311
 
    host = notifychangeproperty(dbus.String, "Host")
1312
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1313
 
                                   type_func =
1314
 
                                   timedelta_to_milliseconds)
1315
 
    extended_timeout = notifychangeproperty(
1316
 
        dbus.UInt64, "ExtendedTimeout",
1317
 
        type_func = timedelta_to_milliseconds)
1318
 
    interval = notifychangeproperty(dbus.UInt64,
1319
 
                                    "Interval",
1320
 
                                    type_func =
1321
 
                                    timedelta_to_milliseconds)
1322
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1323
 
    
1324
 
    del notifychangeproperty
1325
 
    
1326
 
    def __del__(self, *args, **kwargs):
1327
 
        try:
1328
 
            self.remove_from_connection()
1329
 
        except LookupError:
1330
 
            pass
1331
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1332
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1333
 
        Client.__del__(self, *args, **kwargs)
1334
 
    
1335
 
    def checker_callback(self, pid, condition, command,
1336
 
                         *args, **kwargs):
1337
 
        self.checker_callback_tag = None
1338
 
        self.checker = None
1339
 
        if os.WIFEXITED(condition):
1340
 
            exitstatus = os.WEXITSTATUS(condition)
1341
 
            # Emit D-Bus signal
1342
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1343
 
                                  dbus.Int64(condition),
1344
 
                                  dbus.String(command))
1345
 
        else:
1346
 
            # Emit D-Bus signal
1347
 
            self.CheckerCompleted(dbus.Int16(-1),
1348
 
                                  dbus.Int64(condition),
1349
 
                                  dbus.String(command))
1350
 
        
1351
 
        return Client.checker_callback(self, pid, condition, command,
1352
 
                                       *args, **kwargs)
1353
 
    
1354
 
    def start_checker(self, *args, **kwargs):
1355
 
        old_checker_pid = getattr(self.checker, "pid", None)
1356
 
        r = Client.start_checker(self, *args, **kwargs)
1357
 
        # Only if new checker process was started
1358
 
        if (self.checker is not None
1359
 
            and old_checker_pid != self.checker.pid):
1360
 
            # Emit D-Bus signal
1361
 
            self.CheckerStarted(self.current_checker_command)
1362
 
        return r
1363
 
    
1364
 
    def _reset_approved(self):
1365
 
        self.approved = None
1366
 
        return False
1367
 
    
1368
 
    def approve(self, value=True):
1369
 
        self.approved = value
1370
 
        gobject.timeout_add(timedelta_to_milliseconds
1371
 
                            (self.approval_duration),
1372
 
                            self._reset_approved)
1373
 
        self.send_changedstate()
1374
 
    
1375
 
    ## D-Bus methods, signals & properties
1376
 
    _interface = "se.recompile.Mandos.Client"
1377
 
    
1378
 
    ## Interfaces
1379
 
    
1380
 
    @dbus_interface_annotations(_interface)
1381
 
    def _foo(self):
1382
 
        return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1383
 
                     "false"}
1384
 
    
1385
 
    ## Signals
1386
 
    
1387
 
    # CheckerCompleted - signal
1388
 
    @dbus.service.signal(_interface, signature="nxs")
1389
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1390
 
        "D-Bus signal"
1391
 
        pass
1392
 
    
1393
 
    # CheckerStarted - signal
1394
 
    @dbus.service.signal(_interface, signature="s")
1395
 
    def CheckerStarted(self, command):
1396
 
        "D-Bus signal"
1397
 
        pass
1398
 
    
1399
 
    # PropertyChanged - signal
1400
 
    @dbus.service.signal(_interface, signature="sv")
1401
 
    def PropertyChanged(self, property, value):
1402
 
        "D-Bus signal"
1403
 
        pass
1404
 
    
1405
 
    # GotSecret - signal
1406
 
    @dbus.service.signal(_interface)
1407
 
    def GotSecret(self):
1408
 
        """D-Bus signal
1409
 
        Is sent after a successful transfer of secret from the Mandos
1410
 
        server to mandos-client
1411
 
        """
1412
 
        pass
1413
 
    
1414
 
    # Rejected - signal
1415
 
    @dbus.service.signal(_interface, signature="s")
1416
 
    def Rejected(self, reason):
1417
 
        "D-Bus signal"
1418
 
        pass
1419
 
    
1420
 
    # NeedApproval - signal
1421
 
    @dbus.service.signal(_interface, signature="tb")
1422
 
    def NeedApproval(self, timeout, default):
1423
 
        "D-Bus signal"
1424
 
        return self.need_approval()
1425
 
    
1426
 
    ## Methods
1427
 
    
1428
 
    # Approve - method
1429
 
    @dbus.service.method(_interface, in_signature="b")
1430
 
    def Approve(self, value):
1431
 
        self.approve(value)
1432
 
    
1433
 
    # CheckedOK - method
1434
 
    @dbus.service.method(_interface)
1435
 
    def CheckedOK(self):
1436
 
        self.checked_ok()
1437
 
    
1438
 
    # Enable - method
1439
 
    @dbus.service.method(_interface)
1440
 
    def Enable(self):
1441
 
        "D-Bus method"
1442
 
        self.enable()
1443
 
    
1444
 
    # StartChecker - method
1445
 
    @dbus.service.method(_interface)
1446
 
    def StartChecker(self):
1447
 
        "D-Bus method"
1448
 
        self.start_checker()
1449
 
    
1450
 
    # Disable - method
1451
 
    @dbus.service.method(_interface)
1452
 
    def Disable(self):
1453
 
        "D-Bus method"
1454
 
        self.disable()
1455
 
    
1456
 
    # StopChecker - method
1457
 
    @dbus.service.method(_interface)
1458
 
    def StopChecker(self):
1459
 
        self.stop_checker()
1460
 
    
1461
 
    ## Properties
1462
 
    
1463
 
    # ApprovalPending - property
1464
 
    @dbus_service_property(_interface, signature="b", access="read")
1465
 
    def ApprovalPending_dbus_property(self):
1466
 
        return dbus.Boolean(bool(self.approvals_pending))
1467
 
    
1468
 
    # ApprovedByDefault - property
1469
 
    @dbus_service_property(_interface, signature="b",
1470
 
                           access="readwrite")
1471
 
    def ApprovedByDefault_dbus_property(self, value=None):
1472
 
        if value is None:       # get
1473
 
            return dbus.Boolean(self.approved_by_default)
1474
 
        self.approved_by_default = bool(value)
1475
 
    
1476
 
    # ApprovalDelay - property
1477
 
    @dbus_service_property(_interface, signature="t",
1478
 
                           access="readwrite")
1479
 
    def ApprovalDelay_dbus_property(self, value=None):
1480
 
        if value is None:       # get
1481
 
            return dbus.UInt64(self.approval_delay_milliseconds())
1482
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1483
 
    
1484
 
    # ApprovalDuration - property
1485
 
    @dbus_service_property(_interface, signature="t",
1486
 
                           access="readwrite")
1487
 
    def ApprovalDuration_dbus_property(self, value=None):
1488
 
        if value is None:       # get
1489
 
            return dbus.UInt64(timedelta_to_milliseconds(
1490
 
                    self.approval_duration))
1491
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1492
 
    
1493
 
    # Name - property
1494
 
    @dbus_service_property(_interface, signature="s", access="read")
1495
 
    def Name_dbus_property(self):
1496
 
        return dbus.String(self.name)
1497
 
    
1498
 
    # Fingerprint - property
1499
 
    @dbus_service_property(_interface, signature="s", access="read")
1500
 
    def Fingerprint_dbus_property(self):
1501
 
        return dbus.String(self.fingerprint)
1502
 
    
1503
 
    # Host - property
1504
 
    @dbus_service_property(_interface, signature="s",
1505
 
                           access="readwrite")
1506
 
    def Host_dbus_property(self, value=None):
1507
 
        if value is None:       # get
1508
 
            return dbus.String(self.host)
1509
 
        self.host = unicode(value)
1510
 
    
1511
 
    # Created - property
1512
 
    @dbus_service_property(_interface, signature="s", access="read")
1513
 
    def Created_dbus_property(self):
1514
 
        return datetime_to_dbus(self.created)
1515
 
    
1516
 
    # LastEnabled - property
1517
 
    @dbus_service_property(_interface, signature="s", access="read")
1518
 
    def LastEnabled_dbus_property(self):
1519
 
        return datetime_to_dbus(self.last_enabled)
1520
 
    
1521
 
    # Enabled - property
1522
 
    @dbus_service_property(_interface, signature="b",
1523
 
                           access="readwrite")
1524
 
    def Enabled_dbus_property(self, value=None):
1525
 
        if value is None:       # get
1526
 
            return dbus.Boolean(self.enabled)
1527
 
        if value:
1528
 
            self.enable()
1529
 
        else:
1530
 
            self.disable()
1531
 
    
1532
 
    # LastCheckedOK - property
1533
 
    @dbus_service_property(_interface, signature="s",
1534
 
                           access="readwrite")
1535
 
    def LastCheckedOK_dbus_property(self, value=None):
1536
 
        if value is not None:
1537
 
            self.checked_ok()
1538
 
            return
1539
 
        return datetime_to_dbus(self.last_checked_ok)
1540
 
    
1541
 
    # LastCheckerStatus - property
1542
 
    @dbus_service_property(_interface, signature="n",
1543
 
                           access="read")
1544
 
    def LastCheckerStatus_dbus_property(self):
1545
 
        return dbus.Int16(self.last_checker_status)
1546
 
    
1547
 
    # Expires - property
1548
 
    @dbus_service_property(_interface, signature="s", access="read")
1549
 
    def Expires_dbus_property(self):
1550
 
        return datetime_to_dbus(self.expires)
1551
 
    
1552
 
    # LastApprovalRequest - property
1553
 
    @dbus_service_property(_interface, signature="s", access="read")
1554
 
    def LastApprovalRequest_dbus_property(self):
1555
 
        return datetime_to_dbus(self.last_approval_request)
1556
 
    
1557
 
    # Timeout - property
1558
 
    @dbus_service_property(_interface, signature="t",
1559
 
                           access="readwrite")
1560
 
    def Timeout_dbus_property(self, value=None):
1561
 
        if value is None:       # get
1562
 
            return dbus.UInt64(self.timeout_milliseconds())
1563
 
        old_timeout = self.timeout
1564
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1565
 
        # Reschedule disabling
1566
 
        if self.enabled:
1567
 
            now = datetime.datetime.utcnow()
1568
 
            self.expires += self.timeout - old_timeout
1569
 
            if self.expires <= now:
1570
 
                # The timeout has passed
1571
 
                self.disable()
1572
 
            else:
1573
 
                if (getattr(self, "disable_initiator_tag", None)
1574
 
                    is None):
1575
 
                    return
1576
 
                gobject.source_remove(self.disable_initiator_tag)
1577
 
                self.disable_initiator_tag = (
1578
 
                    gobject.timeout_add(
1579
 
                        timedelta_to_milliseconds(self.expires - now),
1580
 
                        self.disable))
1581
 
    
1582
 
    # ExtendedTimeout - property
1583
 
    @dbus_service_property(_interface, signature="t",
1584
 
                           access="readwrite")
1585
 
    def ExtendedTimeout_dbus_property(self, value=None):
1586
 
        if value is None:       # get
1587
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
1588
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1589
 
    
1590
 
    # Interval - property
1591
 
    @dbus_service_property(_interface, signature="t",
1592
 
                           access="readwrite")
1593
 
    def Interval_dbus_property(self, value=None):
1594
 
        if value is None:       # get
1595
 
            return dbus.UInt64(self.interval_milliseconds())
1596
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1597
 
        if getattr(self, "checker_initiator_tag", None) is None:
1598
 
            return
1599
 
        if self.enabled:
1600
 
            # Reschedule checker run
1601
 
            gobject.source_remove(self.checker_initiator_tag)
1602
 
            self.checker_initiator_tag = (gobject.timeout_add
1603
 
                                          (value, self.start_checker))
1604
 
            self.start_checker()    # Start one now, too
1605
 
    
1606
 
    # Checker - property
1607
 
    @dbus_service_property(_interface, signature="s",
1608
 
                           access="readwrite")
1609
 
    def Checker_dbus_property(self, value=None):
1610
 
        if value is None:       # get
1611
 
            return dbus.String(self.checker_command)
1612
 
        self.checker_command = unicode(value)
1613
 
    
1614
 
    # CheckerRunning - property
1615
 
    @dbus_service_property(_interface, signature="b",
1616
 
                           access="readwrite")
1617
 
    def CheckerRunning_dbus_property(self, value=None):
1618
 
        if value is None:       # get
1619
 
            return dbus.Boolean(self.checker is not None)
1620
 
        if value:
1621
 
            self.start_checker()
1622
 
        else:
1623
 
            self.stop_checker()
1624
 
    
1625
 
    # ObjectPath - property
1626
 
    @dbus_service_property(_interface, signature="o", access="read")
1627
 
    def ObjectPath_dbus_property(self):
1628
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1629
 
    
1630
 
    # Secret = property
1631
 
    @dbus_service_property(_interface, signature="ay",
1632
 
                           access="write", byte_arrays=True)
1633
 
    def Secret_dbus_property(self, value):
1634
 
        self.secret = str(value)
1635
 
    
1636
 
    del _interface
1637
 
 
1638
 
 
1639
 
class ProxyClient(object):
1640
 
    def __init__(self, child_pipe, fpr, address):
1641
 
        self._pipe = child_pipe
1642
 
        self._pipe.send(('init', fpr, address))
1643
 
        if not self._pipe.recv():
1644
 
            raise KeyError()
1645
 
    
1646
 
    def __getattribute__(self, name):
1647
 
        if name == '_pipe':
1648
 
            return super(ProxyClient, self).__getattribute__(name)
1649
 
        self._pipe.send(('getattr', name))
1650
 
        data = self._pipe.recv()
1651
 
        if data[0] == 'data':
1652
 
            return data[1]
1653
 
        if data[0] == 'function':
1654
 
            def func(*args, **kwargs):
1655
 
                self._pipe.send(('funcall', name, args, kwargs))
1656
 
                return self._pipe.recv()[1]
1657
 
            return func
1658
 
    
1659
 
    def __setattr__(self, name, value):
1660
 
        if name == '_pipe':
1661
 
            return super(ProxyClient, self).__setattr__(name, value)
1662
 
        self._pipe.send(('setattr', name, value))
1663
 
 
1664
 
 
1665
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1666
 
    """A class to handle client connections.
1667
 
    
1668
 
    Instantiated once for each connection to handle it.
 
371
    def still_valid(self):
 
372
        """Has the timeout not yet passed for this client?"""
 
373
        now = datetime.datetime.now()
 
374
        if self.last_checked_ok is None:
 
375
            return now < (self.created + self.timeout)
 
376
        else:
 
377
            return now < (self.last_checked_ok + self.timeout)
 
378
 
 
379
 
 
380
def peer_certificate(session):
 
381
    "Return the peer's OpenPGP certificate as a bytestring"
 
382
    # If not an OpenPGP certificate...
 
383
    if gnutls.library.functions.gnutls_certificate_type_get\
 
384
            (session._c_object) \
 
385
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
386
        # ...do the normal thing
 
387
        return session.peer_certificate
 
388
    list_size = ctypes.c_uint()
 
389
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
390
        (session._c_object, ctypes.byref(list_size))
 
391
    if list_size.value == 0:
 
392
        return None
 
393
    cert = cert_list[0]
 
394
    return ctypes.string_at(cert.data, cert.size)
 
395
 
 
396
 
 
397
def fingerprint(openpgp):
 
398
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
399
    # New empty GnuTLS certificate
 
400
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
401
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
402
        (ctypes.byref(crt))
 
403
    # New GnuTLS "datum" with the OpenPGP public key
 
404
    datum = gnutls.library.types.gnutls_datum_t\
 
405
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
406
                     ctypes.POINTER(ctypes.c_ubyte)),
 
407
         ctypes.c_uint(len(openpgp)))
 
408
    # Import the OpenPGP public key into the certificate
 
409
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
410
        (crt,
 
411
         ctypes.byref(datum),
 
412
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
413
    # New buffer for the fingerprint
 
414
    buffer = ctypes.create_string_buffer(20)
 
415
    buffer_length = ctypes.c_size_t()
 
416
    # Get the fingerprint from the certificate into the buffer
 
417
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
418
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
419
    # Deinit the certificate
 
420
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
421
    # Convert the buffer to a Python bytestring
 
422
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
423
    # Convert the bytestring to hexadecimal notation
 
424
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
425
    return hex_fpr
 
426
 
 
427
 
 
428
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
429
    """A TCP request handler class.
 
430
    Instantiated by IPv6_TCPServer for each request to handle it.
1669
431
    Note: This will run in its own forked process."""
1670
432
    
1671
433
    def handle(self):
1672
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1673
 
            logger.info("TCP connection from: %s",
1674
 
                        unicode(self.client_address))
1675
 
            logger.debug("Pipe FD: %d",
1676
 
                         self.server.child_pipe.fileno())
1677
 
            
1678
 
            session = (gnutls.connection
1679
 
                       .ClientSession(self.request,
1680
 
                                      gnutls.connection
1681
 
                                      .X509Credentials()))
1682
 
            
1683
 
            # Note: gnutls.connection.X509Credentials is really a
1684
 
            # generic GnuTLS certificate credentials object so long as
1685
 
            # no X.509 keys are added to it.  Therefore, we can use it
1686
 
            # here despite using OpenPGP certificates.
1687
 
            
1688
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1689
 
            #                      "+AES-256-CBC", "+SHA1",
1690
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1691
 
            #                      "+DHE-DSS"))
1692
 
            # Use a fallback default, since this MUST be set.
1693
 
            priority = self.server.gnutls_priority
1694
 
            if priority is None:
1695
 
                priority = "NORMAL"
1696
 
            (gnutls.library.functions
1697
 
             .gnutls_priority_set_direct(session._c_object,
1698
 
                                         priority, None))
1699
 
            
1700
 
            # Start communication using the Mandos protocol
1701
 
            # Get protocol number
1702
 
            line = self.request.makefile().readline()
1703
 
            logger.debug("Protocol version: %r", line)
1704
 
            try:
1705
 
                if int(line.strip().split()[0]) > 1:
1706
 
                    raise RuntimeError(line)
1707
 
            except (ValueError, IndexError, RuntimeError) as error:
1708
 
                logger.error("Unknown protocol version: %s", error)
1709
 
                return
1710
 
            
1711
 
            # Start GnuTLS connection
1712
 
            try:
1713
 
                session.handshake()
1714
 
            except gnutls.errors.GNUTLSError as error:
1715
 
                logger.warning("Handshake failed: %s", error)
1716
 
                # Do not run session.bye() here: the session is not
1717
 
                # established.  Just abandon the request.
1718
 
                return
1719
 
            logger.debug("Handshake succeeded")
1720
 
            
1721
 
            approval_required = False
1722
 
            try:
1723
 
                try:
1724
 
                    fpr = self.fingerprint(self.peer_certificate
1725
 
                                           (session))
1726
 
                except (TypeError,
1727
 
                        gnutls.errors.GNUTLSError) as error:
1728
 
                    logger.warning("Bad certificate: %s", error)
1729
 
                    return
1730
 
                logger.debug("Fingerprint: %s", fpr)
1731
 
                
1732
 
                try:
1733
 
                    client = ProxyClient(child_pipe, fpr,
1734
 
                                         self.client_address)
1735
 
                except KeyError:
1736
 
                    return
1737
 
                
1738
 
                if client.approval_delay:
1739
 
                    delay = client.approval_delay
1740
 
                    client.approvals_pending += 1
1741
 
                    approval_required = True
1742
 
                
1743
 
                while True:
1744
 
                    if not client.enabled:
1745
 
                        logger.info("Client %s is disabled",
1746
 
                                       client.name)
1747
 
                        if self.server.use_dbus:
1748
 
                            # Emit D-Bus signal
1749
 
                            client.Rejected("Disabled")
1750
 
                        return
1751
 
                    
1752
 
                    if client.approved or not client.approval_delay:
1753
 
                        #We are approved or approval is disabled
1754
 
                        break
1755
 
                    elif client.approved is None:
1756
 
                        logger.info("Client %s needs approval",
1757
 
                                    client.name)
1758
 
                        if self.server.use_dbus:
1759
 
                            # Emit D-Bus signal
1760
 
                            client.NeedApproval(
1761
 
                                client.approval_delay_milliseconds(),
1762
 
                                client.approved_by_default)
1763
 
                    else:
1764
 
                        logger.warning("Client %s was not approved",
1765
 
                                       client.name)
1766
 
                        if self.server.use_dbus:
1767
 
                            # Emit D-Bus signal
1768
 
                            client.Rejected("Denied")
1769
 
                        return
1770
 
                    
1771
 
                    #wait until timeout or approved
1772
 
                    time = datetime.datetime.now()
1773
 
                    client.changedstate.acquire()
1774
 
                    client.changedstate.wait(
1775
 
                        float(timedelta_to_milliseconds(delay)
1776
 
                              / 1000))
1777
 
                    client.changedstate.release()
1778
 
                    time2 = datetime.datetime.now()
1779
 
                    if (time2 - time) >= delay:
1780
 
                        if not client.approved_by_default:
1781
 
                            logger.warning("Client %s timed out while"
1782
 
                                           " waiting for approval",
1783
 
                                           client.name)
1784
 
                            if self.server.use_dbus:
1785
 
                                # Emit D-Bus signal
1786
 
                                client.Rejected("Approval timed out")
1787
 
                            return
1788
 
                        else:
1789
 
                            break
1790
 
                    else:
1791
 
                        delay -= time2 - time
1792
 
                
1793
 
                sent_size = 0
1794
 
                while sent_size < len(client.secret):
1795
 
                    try:
1796
 
                        sent = session.send(client.secret[sent_size:])
1797
 
                    except gnutls.errors.GNUTLSError as error:
1798
 
                        logger.warning("gnutls send failed",
1799
 
                                       exc_info=error)
1800
 
                        return
1801
 
                    logger.debug("Sent: %d, remaining: %d",
1802
 
                                 sent, len(client.secret)
1803
 
                                 - (sent_size + sent))
1804
 
                    sent_size += sent
1805
 
                
1806
 
                logger.info("Sending secret to %s", client.name)
1807
 
                # bump the timeout using extended_timeout
1808
 
                client.bump_timeout(client.extended_timeout)
1809
 
                if self.server.use_dbus:
1810
 
                    # Emit D-Bus signal
1811
 
                    client.GotSecret()
1812
 
            
1813
 
            finally:
1814
 
                if approval_required:
1815
 
                    client.approvals_pending -= 1
1816
 
                try:
1817
 
                    session.bye()
1818
 
                except gnutls.errors.GNUTLSError as error:
1819
 
                    logger.warning("GnuTLS bye failed",
1820
 
                                   exc_info=error)
1821
 
    
1822
 
    @staticmethod
1823
 
    def peer_certificate(session):
1824
 
        "Return the peer's OpenPGP certificate as a bytestring"
1825
 
        # If not an OpenPGP certificate...
1826
 
        if (gnutls.library.functions
1827
 
            .gnutls_certificate_type_get(session._c_object)
1828
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1829
 
            # ...do the normal thing
1830
 
            return session.peer_certificate
1831
 
        list_size = ctypes.c_uint(1)
1832
 
        cert_list = (gnutls.library.functions
1833
 
                     .gnutls_certificate_get_peers
1834
 
                     (session._c_object, ctypes.byref(list_size)))
1835
 
        if not bool(cert_list) and list_size.value != 0:
1836
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1837
 
                                            " certificate")
1838
 
        if list_size.value == 0:
1839
 
            return None
1840
 
        cert = cert_list[0]
1841
 
        return ctypes.string_at(cert.data, cert.size)
1842
 
    
1843
 
    @staticmethod
1844
 
    def fingerprint(openpgp):
1845
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1846
 
        # New GnuTLS "datum" with the OpenPGP public key
1847
 
        datum = (gnutls.library.types
1848
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1849
 
                                             ctypes.POINTER
1850
 
                                             (ctypes.c_ubyte)),
1851
 
                                 ctypes.c_uint(len(openpgp))))
1852
 
        # New empty GnuTLS certificate
1853
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1854
 
        (gnutls.library.functions
1855
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1856
 
        # Import the OpenPGP public key into the certificate
1857
 
        (gnutls.library.functions
1858
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1859
 
                                    gnutls.library.constants
1860
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1861
 
        # Verify the self signature in the key
1862
 
        crtverify = ctypes.c_uint()
1863
 
        (gnutls.library.functions
1864
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1865
 
                                         ctypes.byref(crtverify)))
1866
 
        if crtverify.value != 0:
1867
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1868
 
            raise (gnutls.errors.CertificateSecurityError
1869
 
                   ("Verify failed"))
1870
 
        # New buffer for the fingerprint
1871
 
        buf = ctypes.create_string_buffer(20)
1872
 
        buf_len = ctypes.c_size_t()
1873
 
        # Get the fingerprint from the certificate into the buffer
1874
 
        (gnutls.library.functions
1875
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1876
 
                                             ctypes.byref(buf_len)))
1877
 
        # Deinit the certificate
1878
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1879
 
        # Convert the buffer to a Python bytestring
1880
 
        fpr = ctypes.string_at(buf, buf_len.value)
1881
 
        # Convert the bytestring to hexadecimal notation
1882
 
        hex_fpr = binascii.hexlify(fpr).upper()
1883
 
        return hex_fpr
1884
 
 
1885
 
 
1886
 
class MultiprocessingMixIn(object):
1887
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1888
 
    def sub_process_main(self, request, address):
1889
 
        try:
1890
 
            self.finish_request(request, address)
1891
 
        except Exception:
1892
 
            self.handle_error(request, address)
1893
 
        self.close_request(request)
1894
 
    
1895
 
    def process_request(self, request, address):
1896
 
        """Start a new process to process the request."""
1897
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1898
 
                                       args = (request, address))
1899
 
        proc.start()
1900
 
        return proc
1901
 
 
1902
 
 
1903
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1904
 
    """ adds a pipe to the MixIn """
1905
 
    def process_request(self, request, client_address):
1906
 
        """Overrides and wraps the original process_request().
1907
 
        
1908
 
        This function creates a new pipe in self.pipe
1909
 
        """
1910
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1911
 
        
1912
 
        proc = MultiprocessingMixIn.process_request(self, request,
1913
 
                                                    client_address)
1914
 
        self.child_pipe.close()
1915
 
        self.add_pipe(parent_pipe, proc)
1916
 
    
1917
 
    def add_pipe(self, parent_pipe, proc):
1918
 
        """Dummy function; override as necessary"""
1919
 
        raise NotImplementedError()
1920
 
 
1921
 
 
1922
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1923
 
                     socketserver.TCPServer, object):
1924
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1925
 
    
 
434
        logger.debug(u"TCP connection from: %s",
 
435
                     unicode(self.client_address))
 
436
        session = gnutls.connection.ClientSession\
 
437
                  (self.request, gnutls.connection.X509Credentials())
 
438
        # Note: gnutls.connection.X509Credentials is really a generic
 
439
        # GnuTLS certificate credentials object so long as no X.509
 
440
        # keys are added to it.  Therefore, we can use it here despite
 
441
        # using OpenPGP certificates.
 
442
        
 
443
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
444
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
445
        #                "+DHE-DSS"))
 
446
        priority = "NORMAL"             # Fallback default, since this
 
447
                                        # MUST be set.
 
448
        if self.server.settings["priority"]:
 
449
            priority = self.server.settings["priority"]
 
450
        gnutls.library.functions.gnutls_priority_set_direct\
 
451
            (session._c_object, priority, None);
 
452
        
 
453
        try:
 
454
            session.handshake()
 
455
        except gnutls.errors.GNUTLSError, error:
 
456
            logger.debug(u"Handshake failed: %s", error)
 
457
            # Do not run session.bye() here: the session is not
 
458
            # established.  Just abandon the request.
 
459
            return
 
460
        try:
 
461
            fpr = fingerprint(peer_certificate(session))
 
462
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
463
            logger.debug(u"Bad certificate: %s", error)
 
464
            session.bye()
 
465
            return
 
466
        logger.debug(u"Fingerprint: %s", fpr)
 
467
        client = None
 
468
        for c in self.server.clients:
 
469
            if c.fingerprint == fpr:
 
470
                client = c
 
471
                break
 
472
        if not client:
 
473
            logger.debug(u"Client not found for fingerprint: %s", fpr)
 
474
            session.bye()
 
475
            return
 
476
        # Have to check if client.still_valid(), since it is possible
 
477
        # that the client timed out while establishing the GnuTLS
 
478
        # session.
 
479
        if not client.still_valid():
 
480
            logger.debug(u"Client %(name)s is invalid", vars(client))
 
481
            session.bye()
 
482
            return
 
483
        sent_size = 0
 
484
        while sent_size < len(client.secret):
 
485
            sent = session.send(client.secret[sent_size:])
 
486
            logger.debug(u"Sent: %d, remaining: %d",
 
487
                         sent, len(client.secret)
 
488
                         - (sent_size + sent))
 
489
            sent_size += sent
 
490
        session.bye()
 
491
 
 
492
 
 
493
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
494
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1926
495
    Attributes:
1927
 
        enabled:        Boolean; whether this server is activated yet
1928
 
        interface:      None or a network interface name (string)
1929
 
        use_ipv6:       Boolean; to use IPv6 or not
 
496
        settings:       Server settings
 
497
        clients:        Set() of Client objects
1930
498
    """
1931
 
    def __init__(self, server_address, RequestHandlerClass,
1932
 
                 interface=None, use_ipv6=True, socketfd=None):
1933
 
        """If socketfd is set, use that file descriptor instead of
1934
 
        creating a new one with socket.socket().
1935
 
        """
1936
 
        self.interface = interface
1937
 
        if use_ipv6:
1938
 
            self.address_family = socket.AF_INET6
1939
 
        if socketfd is not None:
1940
 
            # Save the file descriptor
1941
 
            self.socketfd = socketfd
1942
 
            # Save the original socket.socket() function
1943
 
            self.socket_socket = socket.socket
1944
 
            # To implement --socket, we monkey patch socket.socket.
1945
 
            # 
1946
 
            # (When socketserver.TCPServer is a new-style class, we
1947
 
            # could make self.socket into a property instead of monkey
1948
 
            # patching socket.socket.)
1949
 
            # 
1950
 
            # Create a one-time-only replacement for socket.socket()
1951
 
            @functools.wraps(socket.socket)
1952
 
            def socket_wrapper(*args, **kwargs):
1953
 
                # Restore original function so subsequent calls are
1954
 
                # not affected.
1955
 
                socket.socket = self.socket_socket
1956
 
                del self.socket_socket
1957
 
                # This time only, return a new socket object from the
1958
 
                # saved file descriptor.
1959
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1960
 
            # Replace socket.socket() function with wrapper
1961
 
            socket.socket = socket_wrapper
1962
 
        # The socketserver.TCPServer.__init__ will call
1963
 
        # socket.socket(), which might be our replacement,
1964
 
        # socket_wrapper(), if socketfd was set.
1965
 
        socketserver.TCPServer.__init__(self, server_address,
1966
 
                                        RequestHandlerClass)
1967
 
    
 
499
    address_family = socket.AF_INET6
 
500
    def __init__(self, *args, **kwargs):
 
501
        if "settings" in kwargs:
 
502
            self.settings = kwargs["settings"]
 
503
            del kwargs["settings"]
 
504
        if "clients" in kwargs:
 
505
            self.clients = kwargs["clients"]
 
506
            del kwargs["clients"]
 
507
        return super(type(self), self).__init__(*args, **kwargs)
1968
508
    def server_bind(self):
1969
509
        """This overrides the normal server_bind() function
1970
510
        to bind to an interface if one was specified, and also NOT to
1971
511
        bind to an address or port if they were not specified."""
1972
 
        if self.interface is not None:
1973
 
            if SO_BINDTODEVICE is None:
1974
 
                logger.error("SO_BINDTODEVICE does not exist;"
1975
 
                             " cannot bind to interface %s",
1976
 
                             self.interface)
1977
 
            else:
1978
 
                try:
1979
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1980
 
                                           SO_BINDTODEVICE,
1981
 
                                           str(self.interface + '\0'))
1982
 
                except socket.error as error:
1983
 
                    if error.errno == errno.EPERM:
1984
 
                        logger.error("No permission to bind to"
1985
 
                                     " interface %s", self.interface)
1986
 
                    elif error.errno == errno.ENOPROTOOPT:
1987
 
                        logger.error("SO_BINDTODEVICE not available;"
1988
 
                                     " cannot bind to interface %s",
1989
 
                                     self.interface)
1990
 
                    elif error.errno == errno.ENODEV:
1991
 
                        logger.error("Interface %s does not exist,"
1992
 
                                     " cannot bind", self.interface)
1993
 
                    else:
1994
 
                        raise
 
512
        if self.settings["interface"]:
 
513
            # 25 is from /usr/include/asm-i486/socket.h
 
514
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
515
            try:
 
516
                self.socket.setsockopt(socket.SOL_SOCKET,
 
517
                                       SO_BINDTODEVICE,
 
518
                                       self.settings["interface"])
 
519
            except socket.error, error:
 
520
                if error[0] == errno.EPERM:
 
521
                    logger.warning(u"No permission to"
 
522
                                   u" bind to interface %s",
 
523
                                   self.settings["interface"])
 
524
                else:
 
525
                    raise error
1995
526
        # Only bind(2) the socket if we really need to.
1996
527
        if self.server_address[0] or self.server_address[1]:
1997
528
            if not self.server_address[0]:
1998
 
                if self.address_family == socket.AF_INET6:
1999
 
                    any_address = "::" # in6addr_any
2000
 
                else:
2001
 
                    any_address = "0.0.0.0" # INADDR_ANY
2002
 
                self.server_address = (any_address,
 
529
                in6addr_any = "::"
 
530
                self.server_address = (in6addr_any,
2003
531
                                       self.server_address[1])
2004
 
            elif not self.server_address[1]:
 
532
            elif self.server_address[1] is None:
2005
533
                self.server_address = (self.server_address[0],
2006
534
                                       0)
2007
 
#                 if self.interface:
2008
 
#                     self.server_address = (self.server_address[0],
2009
 
#                                            0, # port
2010
 
#                                            0, # flowinfo
2011
 
#                                            if_nametoindex
2012
 
#                                            (self.interface))
2013
 
            return socketserver.TCPServer.server_bind(self)
2014
 
 
2015
 
 
2016
 
class MandosServer(IPv6_TCPServer):
2017
 
    """Mandos server.
2018
 
    
2019
 
    Attributes:
2020
 
        clients:        set of Client objects
2021
 
        gnutls_priority GnuTLS priority string
2022
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2023
 
    
2024
 
    Assumes a gobject.MainLoop event loop.
2025
 
    """
2026
 
    def __init__(self, server_address, RequestHandlerClass,
2027
 
                 interface=None, use_ipv6=True, clients=None,
2028
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
2029
 
        self.enabled = False
2030
 
        self.clients = clients
2031
 
        if self.clients is None:
2032
 
            self.clients = {}
2033
 
        self.use_dbus = use_dbus
2034
 
        self.gnutls_priority = gnutls_priority
2035
 
        IPv6_TCPServer.__init__(self, server_address,
2036
 
                                RequestHandlerClass,
2037
 
                                interface = interface,
2038
 
                                use_ipv6 = use_ipv6,
2039
 
                                socketfd = socketfd)
2040
 
    def server_activate(self):
2041
 
        if self.enabled:
2042
 
            return socketserver.TCPServer.server_activate(self)
2043
 
    
2044
 
    def enable(self):
2045
 
        self.enabled = True
2046
 
    
2047
 
    def add_pipe(self, parent_pipe, proc):
2048
 
        # Call "handle_ipc" for both data and EOF events
2049
 
        gobject.io_add_watch(parent_pipe.fileno(),
2050
 
                             gobject.IO_IN | gobject.IO_HUP,
2051
 
                             functools.partial(self.handle_ipc,
2052
 
                                               parent_pipe =
2053
 
                                               parent_pipe,
2054
 
                                               proc = proc))
2055
 
    
2056
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2057
 
                   proc = None, client_object=None):
2058
 
        # error, or the other end of multiprocessing.Pipe has closed
2059
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2060
 
            # Wait for other process to exit
2061
 
            proc.join()
2062
 
            return False
2063
 
        
2064
 
        # Read a request from the child
2065
 
        request = parent_pipe.recv()
2066
 
        command = request[0]
2067
 
        
2068
 
        if command == 'init':
2069
 
            fpr = request[1]
2070
 
            address = request[2]
2071
 
            
2072
 
            for c in self.clients.itervalues():
2073
 
                if c.fingerprint == fpr:
2074
 
                    client = c
2075
 
                    break
2076
 
            else:
2077
 
                logger.info("Client not found for fingerprint: %s, ad"
2078
 
                            "dress: %s", fpr, address)
2079
 
                if self.use_dbus:
2080
 
                    # Emit D-Bus signal
2081
 
                    mandos_dbus_service.ClientNotFound(fpr,
2082
 
                                                       address[0])
2083
 
                parent_pipe.send(False)
2084
 
                return False
2085
 
            
2086
 
            gobject.io_add_watch(parent_pipe.fileno(),
2087
 
                                 gobject.IO_IN | gobject.IO_HUP,
2088
 
                                 functools.partial(self.handle_ipc,
2089
 
                                                   parent_pipe =
2090
 
                                                   parent_pipe,
2091
 
                                                   proc = proc,
2092
 
                                                   client_object =
2093
 
                                                   client))
2094
 
            parent_pipe.send(True)
2095
 
            # remove the old hook in favor of the new above hook on
2096
 
            # same fileno
2097
 
            return False
2098
 
        if command == 'funcall':
2099
 
            funcname = request[1]
2100
 
            args = request[2]
2101
 
            kwargs = request[3]
2102
 
            
2103
 
            parent_pipe.send(('data', getattr(client_object,
2104
 
                                              funcname)(*args,
2105
 
                                                         **kwargs)))
2106
 
        
2107
 
        if command == 'getattr':
2108
 
            attrname = request[1]
2109
 
            if callable(client_object.__getattribute__(attrname)):
2110
 
                parent_pipe.send(('function',))
2111
 
            else:
2112
 
                parent_pipe.send(('data', client_object
2113
 
                                  .__getattribute__(attrname)))
2114
 
        
2115
 
        if command == 'setattr':
2116
 
            attrname = request[1]
2117
 
            value = request[2]
2118
 
            setattr(client_object, attrname, value)
2119
 
        
2120
 
        return True
2121
 
 
2122
 
 
2123
 
def rfc3339_duration_to_delta(duration):
2124
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2125
 
    
2126
 
    >>> rfc3339_duration_to_delta("P7D")
2127
 
    datetime.timedelta(7)
2128
 
    >>> rfc3339_duration_to_delta("PT60S")
2129
 
    datetime.timedelta(0, 60)
2130
 
    >>> rfc3339_duration_to_delta("PT60M")
2131
 
    datetime.timedelta(0, 3600)
2132
 
    >>> rfc3339_duration_to_delta("PT24H")
2133
 
    datetime.timedelta(1)
2134
 
    >>> rfc3339_duration_to_delta("P1W")
2135
 
    datetime.timedelta(7)
2136
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2137
 
    datetime.timedelta(0, 330)
2138
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2139
 
    datetime.timedelta(1, 200)
2140
 
    """
2141
 
    
2142
 
    # Parsing an RFC 3339 duration with regular expressions is not
2143
 
    # possible - there would have to be multiple places for the same
2144
 
    # values, like seconds.  The current code, while more esoteric, is
2145
 
    # cleaner without depending on a parsing library.  If Python had a
2146
 
    # built-in library for parsing we would use it, but we'd like to
2147
 
    # avoid excessive use of external libraries.
2148
 
    
2149
 
    # New type for defining tokens, syntax, and semantics all-in-one
2150
 
    Token = collections.namedtuple("Token",
2151
 
                                   ("regexp", # To match token; if
2152
 
                                              # "value" is not None,
2153
 
                                              # must have a "group"
2154
 
                                              # containing digits
2155
 
                                    "value",  # datetime.timedelta or
2156
 
                                              # None
2157
 
                                    "followers")) # Tokens valid after
2158
 
                                                  # this token
2159
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2160
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2161
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2162
 
    token_second = Token(re.compile(r"(\d+)S"),
2163
 
                         datetime.timedelta(seconds=1),
2164
 
                         frozenset((token_end,)))
2165
 
    token_minute = Token(re.compile(r"(\d+)M"),
2166
 
                         datetime.timedelta(minutes=1),
2167
 
                         frozenset((token_second, token_end)))
2168
 
    token_hour = Token(re.compile(r"(\d+)H"),
2169
 
                       datetime.timedelta(hours=1),
2170
 
                       frozenset((token_minute, token_end)))
2171
 
    token_time = Token(re.compile(r"T"),
2172
 
                       None,
2173
 
                       frozenset((token_hour, token_minute,
2174
 
                                  token_second)))
2175
 
    token_day = Token(re.compile(r"(\d+)D"),
2176
 
                      datetime.timedelta(days=1),
2177
 
                      frozenset((token_time, token_end)))
2178
 
    token_month = Token(re.compile(r"(\d+)M"),
2179
 
                        datetime.timedelta(weeks=4),
2180
 
                        frozenset((token_day, token_end)))
2181
 
    token_year = Token(re.compile(r"(\d+)Y"),
2182
 
                       datetime.timedelta(weeks=52),
2183
 
                       frozenset((token_month, token_end)))
2184
 
    token_week = Token(re.compile(r"(\d+)W"),
2185
 
                       datetime.timedelta(weeks=1),
2186
 
                       frozenset((token_end,)))
2187
 
    token_duration = Token(re.compile(r"P"), None,
2188
 
                           frozenset((token_year, token_month,
2189
 
                                      token_day, token_time,
2190
 
                                      token_week))),
2191
 
    # Define starting values
2192
 
    value = datetime.timedelta() # Value so far
2193
 
    found_token = None
2194
 
    followers = frozenset(token_duration,) # Following valid tokens
2195
 
    s = duration                # String left to parse
2196
 
    # Loop until end token is found
2197
 
    while found_token is not token_end:
2198
 
        # Search for any currently valid tokens
2199
 
        for token in followers:
2200
 
            match = token.regexp.match(s)
2201
 
            if match is not None:
2202
 
                # Token found
2203
 
                if token.value is not None:
2204
 
                    # Value found, parse digits
2205
 
                    factor = int(match.group(1), 10)
2206
 
                    # Add to value so far
2207
 
                    value += factor * token.value
2208
 
                # Strip token from string
2209
 
                s = token.regexp.sub("", s, 1)
2210
 
                # Go to found token
2211
 
                found_token = token
2212
 
                # Set valid next tokens
2213
 
                followers = found_token.followers
2214
 
                break
2215
 
        else:
2216
 
            # No currently valid tokens were found
2217
 
            raise ValueError("Invalid RFC 3339 duration")
2218
 
    # End token found
2219
 
    return value
 
535
            return super(type(self), self).server_bind()
2220
536
 
2221
537
 
2222
538
def string_to_delta(interval):
2223
539
    """Parse a string and return a datetime.timedelta
2224
 
    
 
540
 
2225
541
    >>> string_to_delta('7d')
2226
542
    datetime.timedelta(7)
2227
543
    >>> string_to_delta('60s')
2230
546
    datetime.timedelta(0, 3600)
2231
547
    >>> string_to_delta('24h')
2232
548
    datetime.timedelta(1)
2233
 
    >>> string_to_delta('1w')
 
549
    >>> string_to_delta(u'1w')
2234
550
    datetime.timedelta(7)
2235
 
    >>> string_to_delta('5m 30s')
2236
 
    datetime.timedelta(0, 330)
2237
551
    """
2238
 
    
2239
 
    try:
2240
 
        return rfc3339_duration_to_delta(interval)
2241
 
    except ValueError:
2242
 
        pass
2243
 
    
2244
 
    timevalue = datetime.timedelta(0)
2245
 
    for s in interval.split():
2246
 
        try:
2247
 
            suffix = unicode(s[-1])
2248
 
            value = int(s[:-1])
2249
 
            if suffix == "d":
2250
 
                delta = datetime.timedelta(value)
2251
 
            elif suffix == "s":
2252
 
                delta = datetime.timedelta(0, value)
2253
 
            elif suffix == "m":
2254
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2255
 
            elif suffix == "h":
2256
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2257
 
            elif suffix == "w":
2258
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2259
 
            else:
2260
 
                raise ValueError("Unknown suffix {0!r}"
2261
 
                                 .format(suffix))
2262
 
        except IndexError as e:
2263
 
            raise ValueError(*(e.args))
2264
 
        timevalue += delta
2265
 
    return timevalue
2266
 
 
2267
 
 
2268
 
def daemon(nochdir = False, noclose = False):
 
552
    try:
 
553
        suffix=unicode(interval[-1])
 
554
        value=int(interval[:-1])
 
555
        if suffix == u"d":
 
556
            delta = datetime.timedelta(value)
 
557
        elif suffix == u"s":
 
558
            delta = datetime.timedelta(0, value)
 
559
        elif suffix == u"m":
 
560
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
561
        elif suffix == u"h":
 
562
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
563
        elif suffix == u"w":
 
564
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
565
        else:
 
566
            raise ValueError
 
567
    except (ValueError, IndexError):
 
568
        raise ValueError
 
569
    return delta
 
570
 
 
571
 
 
572
def server_state_changed(state):
 
573
    """Derived from the Avahi example code"""
 
574
    if state == avahi.SERVER_COLLISION:
 
575
        logger.warning(u"Server name collision")
 
576
        service.remove()
 
577
    elif state == avahi.SERVER_RUNNING:
 
578
        service.add()
 
579
 
 
580
 
 
581
def entry_group_state_changed(state, error):
 
582
    """Derived from the Avahi example code"""
 
583
    logger.debug(u"state change: %i", state)
 
584
    
 
585
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
586
        logger.debug(u"Service established.")
 
587
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
588
        logger.warning(u"Service name collision.")
 
589
        service.rename()
 
590
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
591
        logger.critical(u"Error in group state changed %s",
 
592
                        unicode(error))
 
593
        raise AvahiGroupError("State changed: %s", str(error))
 
594
 
 
595
def if_nametoindex(interface, _func=[None]):
 
596
    """Call the C function if_nametoindex(), or equivalent"""
 
597
    if _func[0] is not None:
 
598
        return _func[0](interface)
 
599
    try:
 
600
        if "ctypes.util" not in sys.modules:
 
601
            import ctypes.util
 
602
        while True:
 
603
            try:
 
604
                libc = ctypes.cdll.LoadLibrary\
 
605
                       (ctypes.util.find_library("c"))
 
606
                _func[0] = libc.if_nametoindex
 
607
                return _func[0](interface)
 
608
            except IOError, e:
 
609
                if e != errno.EINTR:
 
610
                    raise
 
611
    except (OSError, AttributeError):
 
612
        if "struct" not in sys.modules:
 
613
            import struct
 
614
        if "fcntl" not in sys.modules:
 
615
            import fcntl
 
616
        def the_hard_way(interface):
 
617
            "Get an interface index the hard way, i.e. using fcntl()"
 
618
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
619
            s = socket.socket()
 
620
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
621
                                struct.pack("16s16x", interface))
 
622
            s.close()
 
623
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
624
            return interface_index
 
625
        _func[0] = the_hard_way
 
626
        return _func[0](interface)
 
627
 
 
628
 
 
629
def daemon(nochdir, noclose):
2269
630
    """See daemon(3).  Standard BSD Unix function.
2270
 
    
2271
631
    This should really exist as os.daemon, but it doesn't (yet)."""
2272
632
    if os.fork():
2273
633
        sys.exit()
2274
634
    os.setsid()
2275
635
    if not nochdir:
2276
636
        os.chdir("/")
2277
 
    if os.fork():
2278
 
        sys.exit()
2279
637
    if not noclose:
2280
638
        # Close all standard open file descriptors
2281
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
639
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2282
640
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2283
641
            raise OSError(errno.ENODEV,
2284
 
                          "{0} not a character device"
2285
 
                          .format(os.devnull))
 
642
                          "/dev/null not a character device")
2286
643
        os.dup2(null, sys.stdin.fileno())
2287
644
        os.dup2(null, sys.stdout.fileno())
2288
645
        os.dup2(null, sys.stderr.fileno())
2291
648
 
2292
649
 
2293
650
def main():
2294
 
    
2295
 
    ##################################################################
2296
 
    # Parsing of options, both command line and config file
2297
 
    
2298
 
    parser = argparse.ArgumentParser()
2299
 
    parser.add_argument("-v", "--version", action="version",
2300
 
                        version = "%(prog)s {0}".format(version),
2301
 
                        help="show version number and exit")
2302
 
    parser.add_argument("-i", "--interface", metavar="IF",
2303
 
                        help="Bind to interface IF")
2304
 
    parser.add_argument("-a", "--address",
2305
 
                        help="Address to listen for requests on")
2306
 
    parser.add_argument("-p", "--port", type=int,
2307
 
                        help="Port number to receive requests on")
2308
 
    parser.add_argument("--check", action="store_true",
2309
 
                        help="Run self-test")
2310
 
    parser.add_argument("--debug", action="store_true",
2311
 
                        help="Debug mode; run in foreground and log"
2312
 
                        " to terminal", default=None)
2313
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2314
 
                        help="Debug level for stdout output")
2315
 
    parser.add_argument("--priority", help="GnuTLS"
2316
 
                        " priority string (see GnuTLS documentation)")
2317
 
    parser.add_argument("--servicename",
2318
 
                        metavar="NAME", help="Zeroconf service name")
2319
 
    parser.add_argument("--configdir",
2320
 
                        default="/etc/mandos", metavar="DIR",
2321
 
                        help="Directory to search for configuration"
2322
 
                        " files")
2323
 
    parser.add_argument("--no-dbus", action="store_false",
2324
 
                        dest="use_dbus", help="Do not provide D-Bus"
2325
 
                        " system bus interface", default=None)
2326
 
    parser.add_argument("--no-ipv6", action="store_false",
2327
 
                        dest="use_ipv6", help="Do not use IPv6",
2328
 
                        default=None)
2329
 
    parser.add_argument("--no-restore", action="store_false",
2330
 
                        dest="restore", help="Do not restore stored"
2331
 
                        " state", default=None)
2332
 
    parser.add_argument("--socket", type=int,
2333
 
                        help="Specify a file descriptor to a network"
2334
 
                        " socket to use instead of creating one")
2335
 
    parser.add_argument("--statedir", metavar="DIR",
2336
 
                        help="Directory to save/restore state in")
2337
 
    parser.add_argument("--foreground", action="store_true",
2338
 
                        help="Run in foreground", default=None)
2339
 
    
2340
 
    options = parser.parse_args()
 
651
    global main_loop_started
 
652
    main_loop_started = False
 
653
    
 
654
    parser = OptionParser()
 
655
    parser.add_option("-i", "--interface", type="string",
 
656
                      metavar="IF", help="Bind to interface IF")
 
657
    parser.add_option("-a", "--address", type="string",
 
658
                      help="Address to listen for requests on")
 
659
    parser.add_option("-p", "--port", type="int",
 
660
                      help="Port number to receive requests on")
 
661
    parser.add_option("--check", action="store_true", default=False,
 
662
                      help="Run self-test")
 
663
    parser.add_option("--debug", action="store_true", default=False,
 
664
                      help="Debug mode; run in foreground and log to"
 
665
                      " terminal")
 
666
    parser.add_option("--priority", type="string", help="GnuTLS"
 
667
                      " priority string (see GnuTLS documentation)")
 
668
    parser.add_option("--servicename", type="string", metavar="NAME",
 
669
                      help="Zeroconf service name")
 
670
    parser.add_option("--configdir", type="string",
 
671
                      default="/etc/mandos", metavar="DIR",
 
672
                      help="Directory to search for configuration"
 
673
                      " files")
 
674
    (options, args) = parser.parse_args()
2341
675
    
2342
676
    if options.check:
2343
677
        import doctest
2344
 
        fail_count, test_count = doctest.testmod()
2345
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
678
        doctest.testmod()
 
679
        sys.exit()
2346
680
    
2347
681
    # Default values for config file for server-global settings
2348
682
    server_defaults = { "interface": "",
2350
684
                        "port": "",
2351
685
                        "debug": "False",
2352
686
                        "priority":
2353
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
 
687
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2354
688
                        "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
689
                        }
2363
690
    
2364
691
    # Parse config file for server-global settings
2365
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
692
    server_config = ConfigParser.SafeConfigParser(server_defaults)
2366
693
    del server_defaults
2367
 
    server_config.read(os.path.join(options.configdir,
2368
 
                                    "mandos.conf"))
 
694
    server_config.read(os.path.join(options.configdir, "server.conf"))
 
695
    server_section = "server"
2369
696
    # Convert the SafeConfigParser object to a dict
2370
 
    server_settings = server_config.defaults()
2371
 
    # Use the appropriate methods on the non-string config options
2372
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2373
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2374
 
                                                           option)
2375
 
    if server_settings["port"]:
2376
 
        server_settings["port"] = server_config.getint("DEFAULT",
2377
 
                                                       "port")
2378
 
    if server_settings["socket"]:
2379
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2380
 
                                                         "socket")
2381
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2382
 
        # over with an opened os.devnull.  But we don't want this to
2383
 
        # happen with a supplied network socket.
2384
 
        if 0 <= server_settings["socket"] <= 2:
2385
 
            server_settings["socket"] = os.dup(server_settings
2386
 
                                               ["socket"])
 
697
    server_settings = dict(server_config.items(server_section))
 
698
    # Use getboolean on the boolean config option
 
699
    server_settings["debug"] = server_config.getboolean\
 
700
                               (server_section, "debug")
2387
701
    del server_config
2388
702
    
2389
703
    # Override the settings from the config file with command line
2390
704
    # options, if set.
2391
705
    for option in ("interface", "address", "port", "debug",
2392
 
                   "priority", "servicename", "configdir",
2393
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2394
 
                   "statedir", "socket", "foreground"):
 
706
                   "priority", "servicename", "configdir"):
2395
707
        value = getattr(options, option)
2396
708
        if value is not None:
2397
709
            server_settings[option] = value
2398
710
    del options
2399
 
    # Force all strings to be unicode
2400
 
    for option in server_settings.keys():
2401
 
        if type(server_settings[option]) is str:
2402
 
            server_settings[option] = unicode(server_settings[option])
2403
 
    # Force all boolean options to be boolean
2404
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2405
 
                   "foreground"):
2406
 
        server_settings[option] = bool(server_settings[option])
2407
 
    # Debug implies foreground
2408
 
    if server_settings["debug"]:
2409
 
        server_settings["foreground"] = True
2410
711
    # Now we have our good server settings in "server_settings"
2411
712
    
2412
 
    ##################################################################
2413
 
    
2414
 
    # For convenience
2415
 
    debug = server_settings["debug"]
2416
 
    debuglevel = server_settings["debuglevel"]
2417
 
    use_dbus = server_settings["use_dbus"]
2418
 
    use_ipv6 = server_settings["use_ipv6"]
2419
 
    stored_state_path = os.path.join(server_settings["statedir"],
2420
 
                                     stored_state_file)
2421
 
    foreground = server_settings["foreground"]
2422
 
    
2423
 
    if debug:
2424
 
        initlogger(debug, logging.DEBUG)
2425
 
    else:
2426
 
        if not debuglevel:
2427
 
            initlogger(debug)
2428
 
        else:
2429
 
            level = getattr(logging, debuglevel.upper())
2430
 
            initlogger(debug, level)
2431
 
    
2432
 
    if server_settings["servicename"] != "Mandos":
2433
 
        syslogger.setFormatter(logging.Formatter
2434
 
                               ('Mandos ({0}) [%(process)d]:'
2435
 
                                ' %(levelname)s: %(message)s'
2436
 
                                .format(server_settings
2437
 
                                        ["servicename"])))
2438
 
    
2439
713
    # Parse config file with clients
2440
 
    client_config = configparser.SafeConfigParser(Client
2441
 
                                                  .client_defaults)
 
714
    client_defaults = { "timeout": "1h",
 
715
                        "interval": "5m",
 
716
                        "checker": "fping -q -- %%(fqdn)s",
 
717
                        }
 
718
    client_config = ConfigParser.SafeConfigParser(client_defaults)
2442
719
    client_config.read(os.path.join(server_settings["configdir"],
2443
720
                                    "clients.conf"))
2444
721
    
2445
 
    global mandos_dbus_service
2446
 
    mandos_dbus_service = None
2447
 
    
2448
 
    tcp_server = MandosServer((server_settings["address"],
2449
 
                               server_settings["port"]),
2450
 
                              ClientHandler,
2451
 
                              interface=(server_settings["interface"]
2452
 
                                         or None),
2453
 
                              use_ipv6=use_ipv6,
2454
 
                              gnutls_priority=
2455
 
                              server_settings["priority"],
2456
 
                              use_dbus=use_dbus,
2457
 
                              socketfd=(server_settings["socket"]
2458
 
                                        or None))
2459
 
    if not foreground:
2460
 
        pidfilename = "/run/mandos.pid"
2461
 
        if not os.path.isdir("/run/."):
2462
 
            pidfilename = "/var/run/mandos.pid"
2463
 
        pidfile = None
2464
 
        try:
2465
 
            pidfile = open(pidfilename, "w")
2466
 
        except IOError as e:
2467
 
            logger.error("Could not open file %r", pidfilename,
2468
 
                         exc_info=e)
2469
 
    
2470
 
    for name in ("_mandos", "mandos", "nobody"):
2471
 
        try:
2472
 
            uid = pwd.getpwnam(name).pw_uid
2473
 
            gid = pwd.getpwnam(name).pw_gid
2474
 
            break
2475
 
        except KeyError:
2476
 
            continue
2477
 
    else:
2478
 
        uid = 65534
2479
 
        gid = 65534
2480
 
    try:
2481
 
        os.setgid(gid)
2482
 
        os.setuid(uid)
2483
 
    except OSError as error:
2484
 
        if error.errno != errno.EPERM:
2485
 
            raise
2486
 
    
2487
 
    if debug:
2488
 
        # Enable all possible GnuTLS debugging
2489
 
        
2490
 
        # "Use a log level over 10 to enable all debugging options."
2491
 
        # - GnuTLS manual
2492
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2493
 
        
2494
 
        @gnutls.library.types.gnutls_log_func
2495
 
        def debug_gnutls(level, string):
2496
 
            logger.debug("GnuTLS: %s", string[:-1])
2497
 
        
2498
 
        (gnutls.library.functions
2499
 
         .gnutls_global_set_log_function(debug_gnutls))
2500
 
        
2501
 
        # Redirect stdin so all checkers get /dev/null
2502
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2503
 
        os.dup2(null, sys.stdin.fileno())
2504
 
        if null > 2:
2505
 
            os.close(null)
2506
 
    
2507
 
    # Need to fork before connecting to D-Bus
2508
 
    if not foreground:
2509
 
        # Close all input and output, do double fork, etc.
2510
 
        daemon()
2511
 
    
2512
 
    # multiprocessing will use threads, so before we use gobject we
2513
 
    # need to inform gobject that threads will be used.
2514
 
    gobject.threads_init()
 
722
    global service
 
723
    service = AvahiService(name = server_settings["servicename"],
 
724
                           type = "_mandos._tcp", );
 
725
    if server_settings["interface"]:
 
726
        service.interface = if_nametoindex(server_settings["interface"])
2515
727
    
2516
728
    global main_loop
 
729
    global bus
 
730
    global server
2517
731
    # From the Avahi example code
2518
 
    DBusGMainLoop(set_as_default=True)
 
732
    DBusGMainLoop(set_as_default=True )
2519
733
    main_loop = gobject.MainLoop()
2520
734
    bus = dbus.SystemBus()
 
735
    server = dbus.Interface(
 
736
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
737
            avahi.DBUS_INTERFACE_SERVER )
2521
738
    # End of Avahi example code
2522
 
    if use_dbus:
2523
 
        try:
2524
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2525
 
                                            bus, do_not_queue=True)
2526
 
            old_bus_name = (dbus.service.BusName
2527
 
                            ("se.bsnet.fukt.Mandos", bus,
2528
 
                             do_not_queue=True))
2529
 
        except dbus.exceptions.NameExistsException as e:
2530
 
            logger.error("Disabling D-Bus:", exc_info=e)
2531
 
            use_dbus = False
2532
 
            server_settings["use_dbus"] = False
2533
 
            tcp_server.use_dbus = False
2534
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2535
 
    service = AvahiServiceToSyslog(name =
2536
 
                                   server_settings["servicename"],
2537
 
                                   servicetype = "_mandos._tcp",
2538
 
                                   protocol = protocol, bus = bus)
2539
 
    if server_settings["interface"]:
2540
 
        service.interface = (if_nametoindex
2541
 
                             (str(server_settings["interface"])))
2542
 
    
2543
 
    global multiprocessing_manager
2544
 
    multiprocessing_manager = multiprocessing.Manager()
2545
 
    
2546
 
    client_class = Client
2547
 
    if use_dbus:
2548
 
        client_class = functools.partial(ClientDBus, bus = bus)
2549
 
    
2550
 
    client_settings = Client.config_parser(client_config)
2551
 
    old_client_settings = {}
2552
 
    clients_data = {}
2553
 
    
2554
 
    # This is used to redirect stdout and stderr for checker processes
2555
 
    global wnull
2556
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2557
 
    # Only used if server is running in foreground but not in debug
2558
 
    # mode
2559
 
    if debug or not foreground:
2560
 
        wnull.close()
2561
 
    
2562
 
    # Get client data and settings from last running state.
2563
 
    if server_settings["restore"]:
2564
 
        try:
2565
 
            with open(stored_state_path, "rb") as stored_state:
2566
 
                clients_data, old_client_settings = (pickle.load
2567
 
                                                     (stored_state))
2568
 
            os.remove(stored_state_path)
2569
 
        except IOError as e:
2570
 
            if e.errno == errno.ENOENT:
2571
 
                logger.warning("Could not load persistent state: {0}"
2572
 
                                .format(os.strerror(e.errno)))
2573
 
            else:
2574
 
                logger.critical("Could not load persistent state:",
2575
 
                                exc_info=e)
2576
 
                raise
2577
 
        except EOFError as e:
2578
 
            logger.warning("Could not load persistent state: "
2579
 
                           "EOFError:", exc_info=e)
2580
 
    
2581
 
    with PGPEngine() as pgp:
2582
 
        for client_name, client in clients_data.iteritems():
2583
 
            # Skip removed clients
2584
 
            if client_name not in client_settings:
2585
 
                continue
2586
 
            
2587
 
            # Decide which value to use after restoring saved state.
2588
 
            # We have three different values: Old config file,
2589
 
            # new config file, and saved state.
2590
 
            # New config value takes precedence if it differs from old
2591
 
            # config value, otherwise use saved state.
2592
 
            for name, value in client_settings[client_name].items():
2593
 
                try:
2594
 
                    # For each value in new config, check if it
2595
 
                    # differs from the old config value (Except for
2596
 
                    # the "secret" attribute)
2597
 
                    if (name != "secret" and
2598
 
                        value != old_client_settings[client_name]
2599
 
                        [name]):
2600
 
                        client[name] = value
2601
 
                except KeyError:
2602
 
                    pass
2603
 
            
2604
 
            # Clients who has passed its expire date can still be
2605
 
            # enabled if its last checker was successful.  Clients
2606
 
            # whose checker succeeded before we stored its state is
2607
 
            # assumed to have successfully run all checkers during
2608
 
            # downtime.
2609
 
            if client["enabled"]:
2610
 
                if datetime.datetime.utcnow() >= client["expires"]:
2611
 
                    if not client["last_checked_ok"]:
2612
 
                        logger.warning(
2613
 
                            "disabling client {0} - Client never "
2614
 
                            "performed a successful checker"
2615
 
                            .format(client_name))
2616
 
                        client["enabled"] = False
2617
 
                    elif client["last_checker_status"] != 0:
2618
 
                        logger.warning(
2619
 
                            "disabling client {0} - Client "
2620
 
                            "last checker failed with error code {1}"
2621
 
                            .format(client_name,
2622
 
                                    client["last_checker_status"]))
2623
 
                        client["enabled"] = False
2624
 
                    else:
2625
 
                        client["expires"] = (datetime.datetime
2626
 
                                             .utcnow()
2627
 
                                             + client["timeout"])
2628
 
                        logger.debug("Last checker succeeded,"
2629
 
                                     " keeping {0} enabled"
2630
 
                                     .format(client_name))
2631
 
            try:
2632
 
                client["secret"] = (
2633
 
                    pgp.decrypt(client["encrypted_secret"],
2634
 
                                client_settings[client_name]
2635
 
                                ["secret"]))
2636
 
            except PGPError:
2637
 
                # If decryption fails, we use secret from new settings
2638
 
                logger.debug("Failed to decrypt {0} old secret"
2639
 
                             .format(client_name))
2640
 
                client["secret"] = (
2641
 
                    client_settings[client_name]["secret"])
2642
 
    
2643
 
    # Add/remove clients based on new changes made to config
2644
 
    for client_name in (set(old_client_settings)
2645
 
                        - set(client_settings)):
2646
 
        del clients_data[client_name]
2647
 
    for client_name in (set(client_settings)
2648
 
                        - set(old_client_settings)):
2649
 
        clients_data[client_name] = client_settings[client_name]
2650
 
    
2651
 
    # Create all client objects
2652
 
    for client_name, client in clients_data.iteritems():
2653
 
        tcp_server.clients[client_name] = client_class(
2654
 
            name = client_name, settings = client,
2655
 
            server_settings = server_settings)
2656
 
    
2657
 
    if not tcp_server.clients:
2658
 
        logger.warning("No clients defined")
2659
 
    
2660
 
    if not foreground:
2661
 
        if pidfile is not None:
2662
 
            try:
2663
 
                with pidfile:
2664
 
                    pid = os.getpid()
2665
 
                    pidfile.write(str(pid) + "\n".encode("utf-8"))
2666
 
            except IOError:
2667
 
                logger.error("Could not write to file %r with PID %d",
2668
 
                             pidfilename, pid)
2669
 
        del pidfile
2670
 
        del pidfilename
2671
 
    
2672
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2673
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2674
 
    
2675
 
    if use_dbus:
2676
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2677
 
                                        "se.bsnet.fukt.Mandos"})
2678
 
        class MandosDBusService(DBusObjectWithProperties):
2679
 
            """A D-Bus proxy object"""
2680
 
            def __init__(self):
2681
 
                dbus.service.Object.__init__(self, bus, "/")
2682
 
            _interface = "se.recompile.Mandos"
2683
 
            
2684
 
            @dbus_interface_annotations(_interface)
2685
 
            def _foo(self):
2686
 
                return { "org.freedesktop.DBus.Property"
2687
 
                         ".EmitsChangedSignal":
2688
 
                             "false"}
2689
 
            
2690
 
            @dbus.service.signal(_interface, signature="o")
2691
 
            def ClientAdded(self, objpath):
2692
 
                "D-Bus signal"
2693
 
                pass
2694
 
            
2695
 
            @dbus.service.signal(_interface, signature="ss")
2696
 
            def ClientNotFound(self, fingerprint, address):
2697
 
                "D-Bus signal"
2698
 
                pass
2699
 
            
2700
 
            @dbus.service.signal(_interface, signature="os")
2701
 
            def ClientRemoved(self, objpath, name):
2702
 
                "D-Bus signal"
2703
 
                pass
2704
 
            
2705
 
            @dbus.service.method(_interface, out_signature="ao")
2706
 
            def GetAllClients(self):
2707
 
                "D-Bus method"
2708
 
                return dbus.Array(c.dbus_object_path
2709
 
                                  for c in
2710
 
                                  tcp_server.clients.itervalues())
2711
 
            
2712
 
            @dbus.service.method(_interface,
2713
 
                                 out_signature="a{oa{sv}}")
2714
 
            def GetAllClientsWithProperties(self):
2715
 
                "D-Bus method"
2716
 
                return dbus.Dictionary(
2717
 
                    ((c.dbus_object_path, c.GetAll(""))
2718
 
                     for c in tcp_server.clients.itervalues()),
2719
 
                    signature="oa{sv}")
2720
 
            
2721
 
            @dbus.service.method(_interface, in_signature="o")
2722
 
            def RemoveClient(self, object_path):
2723
 
                "D-Bus method"
2724
 
                for c in tcp_server.clients.itervalues():
2725
 
                    if c.dbus_object_path == object_path:
2726
 
                        del tcp_server.clients[c.name]
2727
 
                        c.remove_from_connection()
2728
 
                        # Don't signal anything except ClientRemoved
2729
 
                        c.disable(quiet=True)
2730
 
                        # Emit D-Bus signal
2731
 
                        self.ClientRemoved(object_path, c.name)
2732
 
                        return
2733
 
                raise KeyError(object_path)
2734
 
            
2735
 
            del _interface
2736
 
        
2737
 
        mandos_dbus_service = MandosDBusService()
 
739
    
 
740
    debug = server_settings["debug"]
 
741
    
 
742
    if debug:
 
743
        console = logging.StreamHandler()
 
744
        # console.setLevel(logging.DEBUG)
 
745
        console.setFormatter(logging.Formatter\
 
746
                             ('%(levelname)s: %(message)s'))
 
747
        logger.addHandler(console)
 
748
        del console
 
749
    
 
750
    clients = Set()
 
751
    def remove_from_clients(client):
 
752
        clients.remove(client)
 
753
        if not clients:
 
754
            logger.debug(u"No clients left, exiting")
 
755
            sys.exit()
 
756
    
 
757
    clients.update(Set(Client(name=section,
 
758
                              stop_hook = remove_from_clients,
 
759
                              **(dict(client_config\
 
760
                                      .items(section))))
 
761
                       for section in client_config.sections()))
 
762
    
 
763
    if not debug:
 
764
        daemon(False, False)
2738
765
    
2739
766
    def cleanup():
2740
767
        "Cleanup function; run on exit"
2741
 
        service.cleanup()
2742
 
        
2743
 
        multiprocessing.active_children()
2744
 
        wnull.close()
2745
 
        if not (tcp_server.clients or client_settings):
2746
 
            return
2747
 
        
2748
 
        # Store client before exiting. Secrets are encrypted with key
2749
 
        # based on what config file has. If config file is
2750
 
        # removed/edited, old secret will thus be unrecovable.
2751
 
        clients = {}
2752
 
        with PGPEngine() as pgp:
2753
 
            for client in tcp_server.clients.itervalues():
2754
 
                key = client_settings[client.name]["secret"]
2755
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2756
 
                                                      key)
2757
 
                client_dict = {}
2758
 
                
2759
 
                # A list of attributes that can not be pickled
2760
 
                # + secret.
2761
 
                exclude = set(("bus", "changedstate", "secret",
2762
 
                               "checker", "server_settings"))
2763
 
                for name, typ in (inspect.getmembers
2764
 
                                  (dbus.service.Object)):
2765
 
                    exclude.add(name)
2766
 
                
2767
 
                client_dict["encrypted_secret"] = (client
2768
 
                                                   .encrypted_secret)
2769
 
                for attr in client.client_structure:
2770
 
                    if attr not in exclude:
2771
 
                        client_dict[attr] = getattr(client, attr)
2772
 
                
2773
 
                clients[client.name] = client_dict
2774
 
                del client_settings[client.name]["secret"]
2775
 
        
2776
 
        try:
2777
 
            with (tempfile.NamedTemporaryFile
2778
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2779
 
                   dir=os.path.dirname(stored_state_path),
2780
 
                   delete=False)) as stored_state:
2781
 
                pickle.dump((clients, client_settings), stored_state)
2782
 
                tempname=stored_state.name
2783
 
            os.rename(tempname, stored_state_path)
2784
 
        except (IOError, OSError) as e:
2785
 
            if not debug:
2786
 
                try:
2787
 
                    os.remove(tempname)
2788
 
                except NameError:
2789
 
                    pass
2790
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2791
 
                logger.warning("Could not save persistent state: {0}"
2792
 
                               .format(os.strerror(e.errno)))
2793
 
            else:
2794
 
                logger.warning("Could not save persistent state:",
2795
 
                               exc_info=e)
2796
 
                raise
2797
 
        
2798
 
        # Delete all clients, and settings from config
2799
 
        while tcp_server.clients:
2800
 
            name, client = tcp_server.clients.popitem()
2801
 
            if use_dbus:
2802
 
                client.remove_from_connection()
2803
 
            # Don't signal anything except ClientRemoved
2804
 
            client.disable(quiet=True)
2805
 
            if use_dbus:
2806
 
                # Emit D-Bus signal
2807
 
                mandos_dbus_service.ClientRemoved(client
2808
 
                                                  .dbus_object_path,
2809
 
                                                  client.name)
2810
 
        client_settings.clear()
 
768
        global group
 
769
        # From the Avahi example code
 
770
        if not group is None:
 
771
            group.Free()
 
772
            group = None
 
773
        # End of Avahi example code
 
774
        
 
775
        while clients:
 
776
            client = clients.pop()
 
777
            client.stop_hook = None
 
778
            client.stop()
2811
779
    
2812
780
    atexit.register(cleanup)
2813
781
    
2814
 
    for client in tcp_server.clients.itervalues():
2815
 
        if use_dbus:
2816
 
            # Emit D-Bus signal
2817
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2818
 
        # Need to initiate checking of clients
2819
 
        if client.enabled:
2820
 
            client.init_checker()
2821
 
    
2822
 
    tcp_server.enable()
2823
 
    tcp_server.server_activate()
2824
 
    
 
782
    if not debug:
 
783
        signal.signal(signal.SIGINT, signal.SIG_IGN)
 
784
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
 
785
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
 
786
    
 
787
    for client in clients:
 
788
        client.start()
 
789
    
 
790
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
791
                                 server_settings["port"]),
 
792
                                tcp_handler,
 
793
                                settings=server_settings,
 
794
                                clients=clients)
2825
795
    # Find out what port we got
2826
796
    service.port = tcp_server.socket.getsockname()[1]
2827
 
    if use_ipv6:
2828
 
        logger.info("Now listening on address %r, port %d,"
2829
 
                    " flowinfo %d, scope_id %d",
2830
 
                    *tcp_server.socket.getsockname())
2831
 
    else:                       # IPv4
2832
 
        logger.info("Now listening on address %r, port %d",
2833
 
                    *tcp_server.socket.getsockname())
 
797
    logger.debug(u"Now listening on address %r, port %d, flowinfo %d,"
 
798
                 u" scope_id %d" % tcp_server.socket.getsockname())
2834
799
    
2835
800
    #service.interface = tcp_server.socket.getsockname()[3]
2836
801
    
2837
802
    try:
2838
803
        # From the Avahi example code
 
804
        server.connect_to_signal("StateChanged", server_state_changed)
2839
805
        try:
2840
 
            service.activate()
2841
 
        except dbus.exceptions.DBusException as error:
2842
 
            logger.critical("D-Bus Exception", exc_info=error)
2843
 
            cleanup()
 
806
            server_state_changed(server.GetState())
 
807
        except dbus.exceptions.DBusException, error:
 
808
            logger.critical(u"DBusException: %s", error)
2844
809
            sys.exit(1)
2845
810
        # End of Avahi example code
2846
811
        
2847
812
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2848
813
                             lambda *args, **kwargs:
2849
 
                             (tcp_server.handle_request
2850
 
                              (*args[2:], **kwargs) or True))
 
814
                             tcp_server.handle_request\
 
815
                             (*args[2:], **kwargs) or True)
2851
816
        
2852
817
        logger.debug("Starting main loop")
 
818
        main_loop_started = True
2853
819
        main_loop.run()
2854
 
    except AvahiError as error:
2855
 
        logger.critical("Avahi Error", exc_info=error)
2856
 
        cleanup()
 
820
    except AvahiError, error:
 
821
        logger.critical(u"AvahiError: %s" + unicode(error))
2857
822
        sys.exit(1)
2858
823
    except KeyboardInterrupt:
2859
824
        if debug:
2860
 
            print("", file=sys.stderr)
2861
 
        logger.debug("Server received KeyboardInterrupt")
2862
 
    logger.debug("Server exiting")
2863
 
    # Must run before the D-Bus bus name gets deregistered
2864
 
    cleanup()
 
825
            print
2865
826
 
2866
827
if __name__ == '__main__':
2867
828
    main()