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  • Committer: Teddy Hogeborn
  • Date: 2014-07-14 21:41:08 UTC
  • Revision ID: teddy@recompile.se-20140714214108-awg7u6gaiy7d40dz
mandos-monitor: New "verbose" mode to see less important log messages.

* mandos-monitor (MandosClientWidget.__init__): Log client creation.
  (MandosClientWidget.checker_completed): Log a successful checker.
  (MandosClientWidget.checker_started): Log starting of a checker.
  (UserInterface.__init__): New optional "log_level" argument.
  (UserInterface.log_message, UserInterface.log_message_raw): Take
                                                              optional
                                                              "level"
                                                              arg.
  (UserInterface.toggle_log_display): Log visibility change.
  (UserInterface.change_log_display): Log wrap mode change.
  (UserInterface.process_input): Show new "v" key in help message and
                                 process "v" key if pressed.
* mandos-monitor.xml (KEYS): Document new "v" key.

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Lines of Context:
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add" and "remove" in the "AvahiService" class, the
10
 
# "server_state_changed" and "entry_group_state_changed" functions,
11
 
# and some lines in "main".
 
9
# methods "add", "remove", "server_state_changed",
 
10
# "entry_group_state_changed", "cleanup", and "activate" in the
 
11
# "AvahiService" class, and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
 
14
# Copyright © 2008-2014 Teddy Hogeborn
 
15
# Copyright © 2008-2014 Björn Påhlsson
15
16
16
17
# This program is free software: you can redistribute it and/or modify
17
18
# it under the terms of the GNU General Public License as published by
27
28
# along with this program.  If not, see
28
29
# <http://www.gnu.org/licenses/>.
29
30
30
 
# Contact the authors at <mandos@fukt.bsnet.se>.
 
31
# Contact the authors at <mandos@recompile.se>.
31
32
32
33
 
33
 
from __future__ import division
34
 
 
35
 
import SocketServer
 
34
from __future__ import (division, absolute_import, print_function,
 
35
                        unicode_literals)
 
36
 
 
37
from future_builtins import *
 
38
 
 
39
import SocketServer as socketserver
36
40
import socket
37
 
import select
38
 
from optparse import OptionParser
 
41
import argparse
39
42
import datetime
40
43
import errno
41
44
import gnutls.crypto
44
47
import gnutls.library.functions
45
48
import gnutls.library.constants
46
49
import gnutls.library.types
47
 
import ConfigParser
 
50
import ConfigParser as configparser
48
51
import sys
49
52
import re
50
53
import os
51
54
import signal
52
 
from sets import Set
53
55
import subprocess
54
56
import atexit
55
57
import stat
56
58
import logging
57
59
import logging.handlers
58
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
59
72
 
60
73
import dbus
 
74
import dbus.service
61
75
import gobject
62
76
import avahi
63
77
from dbus.mainloop.glib import DBusGMainLoop
64
78
import ctypes
65
 
 
66
 
version = "1.0"
67
 
 
68
 
logger = logging.Logger('mandos')
69
 
syslogger = logging.handlers.SysLogHandler\
70
 
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
71
 
             address = "/dev/log")
72
 
syslogger.setFormatter(logging.Formatter\
73
 
                        ('Mandos: %(levelname)s: %(message)s'))
74
 
logger.addHandler(syslogger)
75
 
 
76
 
console = logging.StreamHandler()
77
 
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
78
 
                                       ' %(message)s'))
79
 
logger.addHandler(console)
 
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 = "1.6.6"
 
92
stored_state_file = "clients.pickle"
 
93
 
 
94
logger = logging.getLogger()
 
95
syslogger = None
 
96
 
 
97
try:
 
98
    if_nametoindex = (ctypes.cdll.LoadLibrary
 
99
                      (ctypes.util.find_library("c"))
 
100
                      .if_nametoindex)
 
101
except (OSError, AttributeError):
 
102
    def if_nametoindex(interface):
 
103
        "Get an interface index the hard way, i.e. using fcntl()"
 
104
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
105
        with contextlib.closing(socket.socket()) as s:
 
106
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
107
                                struct.pack(str("16s16x"),
 
108
                                            interface))
 
109
        interface_index = struct.unpack(str("I"),
 
110
                                        ifreq[16:20])[0]
 
111
        return interface_index
 
112
 
 
113
 
 
114
def initlogger(debug, level=logging.WARNING):
 
115
    """init logger and add loglevel"""
 
116
    
 
117
    global syslogger
 
118
    syslogger = (logging.handlers.SysLogHandler
 
119
                 (facility =
 
120
                  logging.handlers.SysLogHandler.LOG_DAEMON,
 
121
                  address = str("/dev/log")))
 
122
    syslogger.setFormatter(logging.Formatter
 
123
                           ('Mandos [%(process)d]: %(levelname)s:'
 
124
                            ' %(message)s'))
 
125
    logger.addHandler(syslogger)
 
126
    
 
127
    if debug:
 
128
        console = logging.StreamHandler()
 
129
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
 
130
                                               ' [%(process)d]:'
 
131
                                               ' %(levelname)s:'
 
132
                                               ' %(message)s'))
 
133
        logger.addHandler(console)
 
134
    logger.setLevel(level)
 
135
 
 
136
 
 
137
class PGPError(Exception):
 
138
    """Exception if encryption/decryption fails"""
 
139
    pass
 
140
 
 
141
 
 
142
class PGPEngine(object):
 
143
    """A simple class for OpenPGP symmetric encryption & decryption"""
 
144
    def __init__(self):
 
145
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
 
146
        self.gnupgargs = ['--batch',
 
147
                          '--home', self.tempdir,
 
148
                          '--force-mdc',
 
149
                          '--quiet',
 
150
                          '--no-use-agent']
 
151
    
 
152
    def __enter__(self):
 
153
        return self
 
154
    
 
155
    def __exit__(self, exc_type, exc_value, traceback):
 
156
        self._cleanup()
 
157
        return False
 
158
    
 
159
    def __del__(self):
 
160
        self._cleanup()
 
161
    
 
162
    def _cleanup(self):
 
163
        if self.tempdir is not None:
 
164
            # Delete contents of tempdir
 
165
            for root, dirs, files in os.walk(self.tempdir,
 
166
                                             topdown = False):
 
167
                for filename in files:
 
168
                    os.remove(os.path.join(root, filename))
 
169
                for dirname in dirs:
 
170
                    os.rmdir(os.path.join(root, dirname))
 
171
            # Remove tempdir
 
172
            os.rmdir(self.tempdir)
 
173
            self.tempdir = None
 
174
    
 
175
    def password_encode(self, password):
 
176
        # Passphrase can not be empty and can not contain newlines or
 
177
        # NUL bytes.  So we prefix it and hex encode it.
 
178
        encoded = b"mandos" + binascii.hexlify(password)
 
179
        if len(encoded) > 2048:
 
180
            # GnuPG can't handle long passwords, so encode differently
 
181
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
 
182
                       .replace(b"\n", b"\\n")
 
183
                       .replace(b"\0", b"\\x00"))
 
184
        return encoded
 
185
    
 
186
    def encrypt(self, data, password):
 
187
        passphrase = self.password_encode(password)
 
188
        with tempfile.NamedTemporaryFile(dir=self.tempdir
 
189
                                         ) as passfile:
 
190
            passfile.write(passphrase)
 
191
            passfile.flush()
 
192
            proc = subprocess.Popen(['gpg', '--symmetric',
 
193
                                     '--passphrase-file',
 
194
                                     passfile.name]
 
195
                                    + self.gnupgargs,
 
196
                                    stdin = subprocess.PIPE,
 
197
                                    stdout = subprocess.PIPE,
 
198
                                    stderr = subprocess.PIPE)
 
199
            ciphertext, err = proc.communicate(input = data)
 
200
        if proc.returncode != 0:
 
201
            raise PGPError(err)
 
202
        return ciphertext
 
203
    
 
204
    def decrypt(self, data, password):
 
205
        passphrase = self.password_encode(password)
 
206
        with tempfile.NamedTemporaryFile(dir = self.tempdir
 
207
                                         ) as passfile:
 
208
            passfile.write(passphrase)
 
209
            passfile.flush()
 
210
            proc = subprocess.Popen(['gpg', '--decrypt',
 
211
                                     '--passphrase-file',
 
212
                                     passfile.name]
 
213
                                    + self.gnupgargs,
 
214
                                    stdin = subprocess.PIPE,
 
215
                                    stdout = subprocess.PIPE,
 
216
                                    stderr = subprocess.PIPE)
 
217
            decrypted_plaintext, err = proc.communicate(input
 
218
                                                        = data)
 
219
        if proc.returncode != 0:
 
220
            raise PGPError(err)
 
221
        return decrypted_plaintext
 
222
 
80
223
 
81
224
class AvahiError(Exception):
82
 
    def __init__(self, value):
 
225
    def __init__(self, value, *args, **kwargs):
83
226
        self.value = value
84
 
    def __str__(self):
85
 
        return repr(self.value)
 
227
        super(AvahiError, self).__init__(value, *args, **kwargs)
 
228
    def __unicode__(self):
 
229
        return unicode(repr(self.value))
86
230
 
87
231
class AvahiServiceError(AvahiError):
88
232
    pass
93
237
 
94
238
class AvahiService(object):
95
239
    """An Avahi (Zeroconf) service.
 
240
    
96
241
    Attributes:
97
242
    interface: integer; avahi.IF_UNSPEC or an interface index.
98
243
               Used to optionally bind to the specified interface.
99
244
    name: string; Example: 'Mandos'
100
245
    type: string; Example: '_mandos._tcp'.
101
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
 
246
     See <https://www.iana.org/assignments/service-names-port-numbers>
102
247
    port: integer; what port to announce
103
248
    TXT: list of strings; TXT record for the service
104
249
    domain: string; Domain to publish on, default to .local if empty.
106
251
    max_renames: integer; maximum number of renames
107
252
    rename_count: integer; counter so we only rename after collisions
108
253
                  a sensible number of times
 
254
    group: D-Bus Entry Group
 
255
    server: D-Bus Server
 
256
    bus: dbus.SystemBus()
109
257
    """
 
258
    
110
259
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
111
 
                 type = None, port = None, TXT = None, domain = "",
112
 
                 host = "", max_renames = 32768):
 
260
                 servicetype = None, port = None, TXT = None,
 
261
                 domain = "", host = "", max_renames = 32768,
 
262
                 protocol = avahi.PROTO_UNSPEC, bus = None):
113
263
        self.interface = interface
114
264
        self.name = name
115
 
        self.type = type
 
265
        self.type = servicetype
116
266
        self.port = port
117
 
        if TXT is None:
118
 
            self.TXT = []
119
 
        else:
120
 
            self.TXT = TXT
 
267
        self.TXT = TXT if TXT is not None else []
121
268
        self.domain = domain
122
269
        self.host = host
123
270
        self.rename_count = 0
124
271
        self.max_renames = max_renames
 
272
        self.protocol = protocol
 
273
        self.group = None       # our entry group
 
274
        self.server = None
 
275
        self.bus = bus
 
276
        self.entry_group_state_changed_match = None
 
277
    
125
278
    def rename(self):
126
279
        """Derived from the Avahi example code"""
127
280
        if self.rename_count >= self.max_renames:
128
 
            logger.critical(u"No suitable Zeroconf service name found"
129
 
                            u" after %i retries, exiting.",
130
 
                            rename_count)
 
281
            logger.critical("No suitable Zeroconf service name found"
 
282
                            " after %i retries, exiting.",
 
283
                            self.rename_count)
131
284
            raise AvahiServiceError("Too many renames")
132
 
        self.name = server.GetAlternativeServiceName(self.name)
133
 
        logger.info(u"Changing Zeroconf service name to %r ...",
134
 
                    str(self.name))
135
 
        syslogger.setFormatter(logging.Formatter\
136
 
                               ('Mandos (%s): %%(levelname)s:'
137
 
                               ' %%(message)s' % self.name))
 
285
        self.name = unicode(self.server
 
286
                            .GetAlternativeServiceName(self.name))
 
287
        logger.info("Changing Zeroconf service name to %r ...",
 
288
                    self.name)
138
289
        self.remove()
139
 
        self.add()
 
290
        try:
 
291
            self.add()
 
292
        except dbus.exceptions.DBusException as error:
 
293
            logger.critical("D-Bus Exception", exc_info=error)
 
294
            self.cleanup()
 
295
            os._exit(1)
140
296
        self.rename_count += 1
 
297
    
141
298
    def remove(self):
142
299
        """Derived from the Avahi example code"""
143
 
        if group is not None:
144
 
            group.Reset()
 
300
        if self.entry_group_state_changed_match is not None:
 
301
            self.entry_group_state_changed_match.remove()
 
302
            self.entry_group_state_changed_match = None
 
303
        if self.group is not None:
 
304
            self.group.Reset()
 
305
    
145
306
    def add(self):
146
307
        """Derived from the Avahi example code"""
147
 
        global group
148
 
        if group is None:
149
 
            group = dbus.Interface\
150
 
                    (bus.get_object(avahi.DBUS_NAME,
151
 
                                    server.EntryGroupNew()),
152
 
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
153
 
            group.connect_to_signal('StateChanged',
154
 
                                    entry_group_state_changed)
155
 
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
156
 
                     service.name, service.type)
157
 
        group.AddService(
158
 
                self.interface,         # interface
159
 
                avahi.PROTO_INET6,      # protocol
160
 
                dbus.UInt32(0),         # flags
161
 
                self.name, self.type,
162
 
                self.domain, self.host,
163
 
                dbus.UInt16(self.port),
164
 
                avahi.string_array_to_txt_array(self.TXT))
165
 
        group.Commit()
166
 
 
167
 
# From the Avahi example code:
168
 
group = None                            # our entry group
169
 
# End of Avahi example code
 
308
        self.remove()
 
309
        if self.group is None:
 
310
            self.group = dbus.Interface(
 
311
                self.bus.get_object(avahi.DBUS_NAME,
 
312
                                    self.server.EntryGroupNew()),
 
313
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
314
        self.entry_group_state_changed_match = (
 
315
            self.group.connect_to_signal(
 
316
                'StateChanged', self.entry_group_state_changed))
 
317
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
 
318
                     self.name, self.type)
 
319
        self.group.AddService(
 
320
            self.interface,
 
321
            self.protocol,
 
322
            dbus.UInt32(0),     # flags
 
323
            self.name, self.type,
 
324
            self.domain, self.host,
 
325
            dbus.UInt16(self.port),
 
326
            avahi.string_array_to_txt_array(self.TXT))
 
327
        self.group.Commit()
 
328
    
 
329
    def entry_group_state_changed(self, state, error):
 
330
        """Derived from the Avahi example code"""
 
331
        logger.debug("Avahi entry group state change: %i", state)
 
332
        
 
333
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
334
            logger.debug("Zeroconf service established.")
 
335
        elif state == avahi.ENTRY_GROUP_COLLISION:
 
336
            logger.info("Zeroconf service name collision.")
 
337
            self.rename()
 
338
        elif state == avahi.ENTRY_GROUP_FAILURE:
 
339
            logger.critical("Avahi: Error in group state changed %s",
 
340
                            unicode(error))
 
341
            raise AvahiGroupError("State changed: {0!s}"
 
342
                                  .format(error))
 
343
    
 
344
    def cleanup(self):
 
345
        """Derived from the Avahi example code"""
 
346
        if self.group is not None:
 
347
            try:
 
348
                self.group.Free()
 
349
            except (dbus.exceptions.UnknownMethodException,
 
350
                    dbus.exceptions.DBusException):
 
351
                pass
 
352
            self.group = None
 
353
        self.remove()
 
354
    
 
355
    def server_state_changed(self, state, error=None):
 
356
        """Derived from the Avahi example code"""
 
357
        logger.debug("Avahi server state change: %i", state)
 
358
        bad_states = { avahi.SERVER_INVALID:
 
359
                           "Zeroconf server invalid",
 
360
                       avahi.SERVER_REGISTERING: None,
 
361
                       avahi.SERVER_COLLISION:
 
362
                           "Zeroconf server name collision",
 
363
                       avahi.SERVER_FAILURE:
 
364
                           "Zeroconf server failure" }
 
365
        if state in bad_states:
 
366
            if bad_states[state] is not None:
 
367
                if error is None:
 
368
                    logger.error(bad_states[state])
 
369
                else:
 
370
                    logger.error(bad_states[state] + ": %r", error)
 
371
            self.cleanup()
 
372
        elif state == avahi.SERVER_RUNNING:
 
373
            self.add()
 
374
        else:
 
375
            if error is None:
 
376
                logger.debug("Unknown state: %r", state)
 
377
            else:
 
378
                logger.debug("Unknown state: %r: %r", state, error)
 
379
    
 
380
    def activate(self):
 
381
        """Derived from the Avahi example code"""
 
382
        if self.server is None:
 
383
            self.server = dbus.Interface(
 
384
                self.bus.get_object(avahi.DBUS_NAME,
 
385
                                    avahi.DBUS_PATH_SERVER,
 
386
                                    follow_name_owner_changes=True),
 
387
                avahi.DBUS_INTERFACE_SERVER)
 
388
        self.server.connect_to_signal("StateChanged",
 
389
                                 self.server_state_changed)
 
390
        self.server_state_changed(self.server.GetState())
 
391
 
 
392
 
 
393
class AvahiServiceToSyslog(AvahiService):
 
394
    def rename(self):
 
395
        """Add the new name to the syslog messages"""
 
396
        ret = AvahiService.rename(self)
 
397
        syslogger.setFormatter(logging.Formatter
 
398
                               ('Mandos ({0}) [%(process)d]:'
 
399
                                ' %(levelname)s: %(message)s'
 
400
                                .format(self.name)))
 
401
        return ret
 
402
 
 
403
 
 
404
def timedelta_to_milliseconds(td):
 
405
    "Convert a datetime.timedelta() to milliseconds"
 
406
    return ((td.days * 24 * 60 * 60 * 1000)
 
407
            + (td.seconds * 1000)
 
408
            + (td.microseconds // 1000))
170
409
 
171
410
 
172
411
class Client(object):
173
412
    """A representation of a client host served by this server.
 
413
    
174
414
    Attributes:
175
 
    name:      string; from the config file, used in log messages
 
415
    approved:   bool(); 'None' if not yet approved/disapproved
 
416
    approval_delay: datetime.timedelta(); Time to wait for approval
 
417
    approval_duration: datetime.timedelta(); Duration of one approval
 
418
    checker:    subprocess.Popen(); a running checker process used
 
419
                                    to see if the client lives.
 
420
                                    'None' if no process is running.
 
421
    checker_callback_tag: a gobject event source tag, or None
 
422
    checker_command: string; External command which is run to check
 
423
                     if client lives.  %() expansions are done at
 
424
                     runtime with vars(self) as dict, so that for
 
425
                     instance %(name)s can be used in the command.
 
426
    checker_initiator_tag: a gobject event source tag, or None
 
427
    created:    datetime.datetime(); (UTC) object creation
 
428
    client_structure: Object describing what attributes a client has
 
429
                      and is used for storing the client at exit
 
430
    current_checker_command: string; current running checker_command
 
431
    disable_initiator_tag: a gobject event source tag, or None
 
432
    enabled:    bool()
176
433
    fingerprint: string (40 or 32 hexadecimal digits); used to
177
434
                 uniquely identify the client
178
 
    secret:    bytestring; sent verbatim (over TLS) to client
179
 
    host:      string; available for use by the checker command
180
 
    created:   datetime.datetime(); object creation, not client host
181
 
    last_checked_ok: datetime.datetime() or None if not yet checked OK
182
 
    timeout:   datetime.timedelta(); How long from last_checked_ok
183
 
                                     until this client is invalid
184
 
    interval:  datetime.timedelta(); How often to start a new checker
185
 
    stop_hook: If set, called by stop() as stop_hook(self)
186
 
    checker:   subprocess.Popen(); a running checker process used
187
 
                                   to see if the client lives.
188
 
                                   'None' if no process is running.
189
 
    checker_initiator_tag: a gobject event source tag, or None
190
 
    stop_initiator_tag:    - '' -
191
 
    checker_callback_tag:  - '' -
192
 
    checker_command: string; External command which is run to check if
193
 
                     client lives.  %() expansions are done at
194
 
                     runtime with vars(self) as dict, so that for
195
 
                     instance %(name)s can be used in the command.
196
 
    Private attibutes:
197
 
    _timeout: Real variable for 'timeout'
198
 
    _interval: Real variable for 'interval'
199
 
    _timeout_milliseconds: Used when calling gobject.timeout_add()
200
 
    _interval_milliseconds: - '' -
 
435
    host:       string; available for use by the checker command
 
436
    interval:   datetime.timedelta(); How often to start a new checker
 
437
    last_approval_request: datetime.datetime(); (UTC) or None
 
438
    last_checked_ok: datetime.datetime(); (UTC) or None
 
439
    last_checker_status: integer between 0 and 255 reflecting exit
 
440
                         status of last checker. -1 reflects crashed
 
441
                         checker, -2 means no checker completed yet.
 
442
    last_enabled: datetime.datetime(); (UTC) or None
 
443
    name:       string; from the config file, used in log messages and
 
444
                        D-Bus identifiers
 
445
    secret:     bytestring; sent verbatim (over TLS) to client
 
446
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
447
                                      until this client is disabled
 
448
    extended_timeout:   extra long timeout when secret has been sent
 
449
    runtime_expansions: Allowed attributes for runtime expansion.
 
450
    expires:    datetime.datetime(); time (UTC) when a client will be
 
451
                disabled, or None
 
452
    server_settings: The server_settings dict from main()
201
453
    """
202
 
    def _set_timeout(self, timeout):
203
 
        "Setter function for 'timeout' attribute"
204
 
        self._timeout = timeout
205
 
        self._timeout_milliseconds = ((self.timeout.days
206
 
                                       * 24 * 60 * 60 * 1000)
207
 
                                      + (self.timeout.seconds * 1000)
208
 
                                      + (self.timeout.microseconds
209
 
                                         // 1000))
210
 
    timeout = property(lambda self: self._timeout,
211
 
                       _set_timeout)
212
 
    del _set_timeout
213
 
    def _set_interval(self, interval):
214
 
        "Setter function for 'interval' attribute"
215
 
        self._interval = interval
216
 
        self._interval_milliseconds = ((self.interval.days
217
 
                                        * 24 * 60 * 60 * 1000)
218
 
                                       + (self.interval.seconds
219
 
                                          * 1000)
220
 
                                       + (self.interval.microseconds
221
 
                                          // 1000))
222
 
    interval = property(lambda self: self._interval,
223
 
                        _set_interval)
224
 
    del _set_interval
225
 
    def __init__(self, name = None, stop_hook=None, config={}):
226
 
        """Note: the 'checker' key in 'config' sets the
227
 
        'checker_command' attribute and *not* the 'checker'
228
 
        attribute."""
 
454
    
 
455
    runtime_expansions = ("approval_delay", "approval_duration",
 
456
                          "created", "enabled", "expires",
 
457
                          "fingerprint", "host", "interval",
 
458
                          "last_approval_request", "last_checked_ok",
 
459
                          "last_enabled", "name", "timeout")
 
460
    client_defaults = { "timeout": "PT5M",
 
461
                        "extended_timeout": "PT15M",
 
462
                        "interval": "PT2M",
 
463
                        "checker": "fping -q -- %%(host)s",
 
464
                        "host": "",
 
465
                        "approval_delay": "PT0S",
 
466
                        "approval_duration": "PT1S",
 
467
                        "approved_by_default": "True",
 
468
                        "enabled": "True",
 
469
                        }
 
470
    
 
471
    def timeout_milliseconds(self):
 
472
        "Return the 'timeout' attribute in milliseconds"
 
473
        return timedelta_to_milliseconds(self.timeout)
 
474
    
 
475
    def extended_timeout_milliseconds(self):
 
476
        "Return the 'extended_timeout' attribute in milliseconds"
 
477
        return timedelta_to_milliseconds(self.extended_timeout)
 
478
    
 
479
    def interval_milliseconds(self):
 
480
        "Return the 'interval' attribute in milliseconds"
 
481
        return timedelta_to_milliseconds(self.interval)
 
482
    
 
483
    def approval_delay_milliseconds(self):
 
484
        return timedelta_to_milliseconds(self.approval_delay)
 
485
    
 
486
    @staticmethod
 
487
    def config_parser(config):
 
488
        """Construct a new dict of client settings of this form:
 
489
        { client_name: {setting_name: value, ...}, ...}
 
490
        with exceptions for any special settings as defined above.
 
491
        NOTE: Must be a pure function. Must return the same result
 
492
        value given the same arguments.
 
493
        """
 
494
        settings = {}
 
495
        for client_name in config.sections():
 
496
            section = dict(config.items(client_name))
 
497
            client = settings[client_name] = {}
 
498
            
 
499
            client["host"] = section["host"]
 
500
            # Reformat values from string types to Python types
 
501
            client["approved_by_default"] = config.getboolean(
 
502
                client_name, "approved_by_default")
 
503
            client["enabled"] = config.getboolean(client_name,
 
504
                                                  "enabled")
 
505
            
 
506
            client["fingerprint"] = (section["fingerprint"].upper()
 
507
                                     .replace(" ", ""))
 
508
            if "secret" in section:
 
509
                client["secret"] = section["secret"].decode("base64")
 
510
            elif "secfile" in section:
 
511
                with open(os.path.expanduser(os.path.expandvars
 
512
                                             (section["secfile"])),
 
513
                          "rb") as secfile:
 
514
                    client["secret"] = secfile.read()
 
515
            else:
 
516
                raise TypeError("No secret or secfile for section {0}"
 
517
                                .format(section))
 
518
            client["timeout"] = string_to_delta(section["timeout"])
 
519
            client["extended_timeout"] = string_to_delta(
 
520
                section["extended_timeout"])
 
521
            client["interval"] = string_to_delta(section["interval"])
 
522
            client["approval_delay"] = string_to_delta(
 
523
                section["approval_delay"])
 
524
            client["approval_duration"] = string_to_delta(
 
525
                section["approval_duration"])
 
526
            client["checker_command"] = section["checker"]
 
527
            client["last_approval_request"] = None
 
528
            client["last_checked_ok"] = None
 
529
            client["last_checker_status"] = -2
 
530
        
 
531
        return settings
 
532
    
 
533
    def __init__(self, settings, name = None, server_settings=None):
229
534
        self.name = name
230
 
        logger.debug(u"Creating client %r", self.name)
 
535
        if server_settings is None:
 
536
            server_settings = {}
 
537
        self.server_settings = server_settings
 
538
        # adding all client settings
 
539
        for setting, value in settings.iteritems():
 
540
            setattr(self, setting, value)
 
541
        
 
542
        if self.enabled:
 
543
            if not hasattr(self, "last_enabled"):
 
544
                self.last_enabled = datetime.datetime.utcnow()
 
545
            if not hasattr(self, "expires"):
 
546
                self.expires = (datetime.datetime.utcnow()
 
547
                                + self.timeout)
 
548
        else:
 
549
            self.last_enabled = None
 
550
            self.expires = None
 
551
        
 
552
        logger.debug("Creating client %r", self.name)
231
553
        # Uppercase and remove spaces from fingerprint for later
232
554
        # comparison purposes with return value from the fingerprint()
233
555
        # function
234
 
        self.fingerprint = config["fingerprint"].upper()\
235
 
                           .replace(u" ", u"")
236
 
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
237
 
        if "secret" in config:
238
 
            self.secret = config["secret"].decode(u"base64")
239
 
        elif "secfile" in config:
240
 
            sf = open(config["secfile"])
241
 
            self.secret = sf.read()
242
 
            sf.close()
243
 
        else:
244
 
            raise TypeError(u"No secret or secfile for client %s"
245
 
                            % self.name)
246
 
        self.host = config.get("host", "")
247
 
        self.created = datetime.datetime.now()
248
 
        self.last_checked_ok = None
249
 
        self.timeout = string_to_delta(config["timeout"])
250
 
        self.interval = string_to_delta(config["interval"])
251
 
        self.stop_hook = stop_hook
 
556
        logger.debug("  Fingerprint: %s", self.fingerprint)
 
557
        self.created = settings.get("created",
 
558
                                    datetime.datetime.utcnow())
 
559
        
 
560
        # attributes specific for this server instance
252
561
        self.checker = None
253
562
        self.checker_initiator_tag = None
254
 
        self.stop_initiator_tag = None
 
563
        self.disable_initiator_tag = None
255
564
        self.checker_callback_tag = None
256
 
        self.check_command = config["checker"]
257
 
    def start(self):
 
565
        self.current_checker_command = None
 
566
        self.approved = None
 
567
        self.approvals_pending = 0
 
568
        self.changedstate = (multiprocessing_manager
 
569
                             .Condition(multiprocessing_manager
 
570
                                        .Lock()))
 
571
        self.client_structure = [attr for attr in
 
572
                                 self.__dict__.iterkeys()
 
573
                                 if not attr.startswith("_")]
 
574
        self.client_structure.append("client_structure")
 
575
        
 
576
        for name, t in inspect.getmembers(type(self),
 
577
                                          lambda obj:
 
578
                                              isinstance(obj,
 
579
                                                         property)):
 
580
            if not name.startswith("_"):
 
581
                self.client_structure.append(name)
 
582
    
 
583
    # Send notice to process children that client state has changed
 
584
    def send_changedstate(self):
 
585
        with self.changedstate:
 
586
            self.changedstate.notify_all()
 
587
    
 
588
    def enable(self):
258
589
        """Start this client's checker and timeout hooks"""
 
590
        if getattr(self, "enabled", False):
 
591
            # Already enabled
 
592
            return
 
593
        self.expires = datetime.datetime.utcnow() + self.timeout
 
594
        self.enabled = True
 
595
        self.last_enabled = datetime.datetime.utcnow()
 
596
        self.init_checker()
 
597
        self.send_changedstate()
 
598
    
 
599
    def disable(self, quiet=True):
 
600
        """Disable this client."""
 
601
        if not getattr(self, "enabled", False):
 
602
            return False
 
603
        if not quiet:
 
604
            logger.info("Disabling client %s", self.name)
 
605
        if getattr(self, "disable_initiator_tag", None) is not None:
 
606
            gobject.source_remove(self.disable_initiator_tag)
 
607
            self.disable_initiator_tag = None
 
608
        self.expires = None
 
609
        if getattr(self, "checker_initiator_tag", None) is not None:
 
610
            gobject.source_remove(self.checker_initiator_tag)
 
611
            self.checker_initiator_tag = None
 
612
        self.stop_checker()
 
613
        self.enabled = False
 
614
        if not quiet:
 
615
            self.send_changedstate()
 
616
        # Do not run this again if called by a gobject.timeout_add
 
617
        return False
 
618
    
 
619
    def __del__(self):
 
620
        self.disable()
 
621
    
 
622
    def init_checker(self):
259
623
        # Schedule a new checker to be started an 'interval' from now,
260
624
        # and every interval from then on.
261
 
        self.checker_initiator_tag = gobject.timeout_add\
262
 
                                     (self._interval_milliseconds,
263
 
                                      self.start_checker)
 
625
        if self.checker_initiator_tag is not None:
 
626
            gobject.source_remove(self.checker_initiator_tag)
 
627
        self.checker_initiator_tag = (gobject.timeout_add
 
628
                                      (self.interval_milliseconds(),
 
629
                                       self.start_checker))
 
630
        # Schedule a disable() when 'timeout' has passed
 
631
        if self.disable_initiator_tag is not None:
 
632
            gobject.source_remove(self.disable_initiator_tag)
 
633
        self.disable_initiator_tag = (gobject.timeout_add
 
634
                                   (self.timeout_milliseconds(),
 
635
                                    self.disable))
264
636
        # Also start a new checker *right now*.
265
637
        self.start_checker()
266
 
        # Schedule a stop() when 'timeout' has passed
267
 
        self.stop_initiator_tag = gobject.timeout_add\
268
 
                                  (self._timeout_milliseconds,
269
 
                                   self.stop)
270
 
    def stop(self):
271
 
        """Stop this client.
272
 
        The possibility that a client might be restarted is left open,
273
 
        but not currently used."""
274
 
        # If this client doesn't have a secret, it is already stopped.
275
 
        if hasattr(self, "secret") and self.secret:
276
 
            logger.info(u"Stopping client %s", self.name)
277
 
            self.secret = None
278
 
        else:
279
 
            return False
280
 
        if getattr(self, "stop_initiator_tag", False):
281
 
            gobject.source_remove(self.stop_initiator_tag)
282
 
            self.stop_initiator_tag = None
283
 
        if getattr(self, "checker_initiator_tag", False):
284
 
            gobject.source_remove(self.checker_initiator_tag)
285
 
            self.checker_initiator_tag = None
286
 
        self.stop_checker()
287
 
        if self.stop_hook:
288
 
            self.stop_hook(self)
289
 
        # Do not run this again if called by a gobject.timeout_add
290
 
        return False
291
 
    def __del__(self):
292
 
        self.stop_hook = None
293
 
        self.stop()
294
 
    def checker_callback(self, pid, condition):
 
638
    
 
639
    def checker_callback(self, pid, condition, command):
295
640
        """The checker has completed, so take appropriate actions."""
296
 
        now = datetime.datetime.now()
297
641
        self.checker_callback_tag = None
298
642
        self.checker = None
299
 
        if os.WIFEXITED(condition) \
300
 
               and (os.WEXITSTATUS(condition) == 0):
301
 
            logger.info(u"Checker for %(name)s succeeded",
302
 
                        vars(self))
303
 
            self.last_checked_ok = now
304
 
            gobject.source_remove(self.stop_initiator_tag)
305
 
            self.stop_initiator_tag = gobject.timeout_add\
306
 
                                      (self._timeout_milliseconds,
307
 
                                       self.stop)
308
 
        elif not os.WIFEXITED(condition):
309
 
            logger.warning(u"Checker for %(name)s crashed?",
 
643
        if os.WIFEXITED(condition):
 
644
            self.last_checker_status = os.WEXITSTATUS(condition)
 
645
            if self.last_checker_status == 0:
 
646
                logger.info("Checker for %(name)s succeeded",
 
647
                            vars(self))
 
648
                self.checked_ok()
 
649
            else:
 
650
                logger.info("Checker for %(name)s failed",
 
651
                            vars(self))
 
652
        else:
 
653
            self.last_checker_status = -1
 
654
            logger.warning("Checker for %(name)s crashed?",
310
655
                           vars(self))
311
 
        else:
312
 
            logger.info(u"Checker for %(name)s failed",
313
 
                        vars(self))
 
656
    
 
657
    def checked_ok(self):
 
658
        """Assert that the client has been seen, alive and well."""
 
659
        self.last_checked_ok = datetime.datetime.utcnow()
 
660
        self.last_checker_status = 0
 
661
        self.bump_timeout()
 
662
    
 
663
    def bump_timeout(self, timeout=None):
 
664
        """Bump up the timeout for this client."""
 
665
        if timeout is None:
 
666
            timeout = self.timeout
 
667
        if self.disable_initiator_tag is not None:
 
668
            gobject.source_remove(self.disable_initiator_tag)
 
669
            self.disable_initiator_tag = None
 
670
        if getattr(self, "enabled", False):
 
671
            self.disable_initiator_tag = (gobject.timeout_add
 
672
                                          (timedelta_to_milliseconds
 
673
                                           (timeout), self.disable))
 
674
            self.expires = datetime.datetime.utcnow() + timeout
 
675
    
 
676
    def need_approval(self):
 
677
        self.last_approval_request = datetime.datetime.utcnow()
 
678
    
314
679
    def start_checker(self):
315
680
        """Start a new checker subprocess if one is not running.
 
681
        
316
682
        If a checker already exists, leave it running and do
317
683
        nothing."""
318
684
        # The reason for not killing a running checker is that if we
319
 
        # did that, then if a checker (for some reason) started
320
 
        # running slowly and taking more than 'interval' time, the
321
 
        # client would inevitably timeout, since no checker would get
322
 
        # a chance to run to completion.  If we instead leave running
 
685
        # did that, and if a checker (for some reason) started running
 
686
        # slowly and taking more than 'interval' time, then the client
 
687
        # would inevitably timeout, since no checker would get a
 
688
        # chance to run to completion.  If we instead leave running
323
689
        # checkers alone, the checker would have to take more time
324
 
        # than 'timeout' for the client to be declared invalid, which
325
 
        # is as it should be.
 
690
        # than 'timeout' for the client to be disabled, which is as it
 
691
        # should be.
 
692
        
 
693
        # If a checker exists, make sure it is not a zombie
 
694
        try:
 
695
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
696
        except AttributeError:
 
697
            pass
 
698
        except OSError as error:
 
699
            if error.errno != errno.ECHILD:
 
700
                raise
 
701
        else:
 
702
            if pid:
 
703
                logger.warning("Checker was a zombie")
 
704
                gobject.source_remove(self.checker_callback_tag)
 
705
                self.checker_callback(pid, status,
 
706
                                      self.current_checker_command)
 
707
        # Start a new checker if needed
326
708
        if self.checker is None:
327
 
            try:
328
 
                # In case check_command has exactly one % operator
329
 
                command = self.check_command % self.host
330
 
            except TypeError:
331
 
                # Escape attributes for the shell
332
 
                escaped_attrs = dict((key, re.escape(str(val)))
333
 
                                     for key, val in
334
 
                                     vars(self).iteritems())
335
 
                try:
336
 
                    command = self.check_command % escaped_attrs
337
 
                except TypeError, error:
338
 
                    logger.error(u'Could not format string "%s":'
339
 
                                 u' %s', self.check_command, error)
340
 
                    return True # Try again later
341
 
            try:
342
 
                logger.info(u"Starting checker %r for %s",
 
709
            # Escape attributes for the shell
 
710
            escaped_attrs = dict(
 
711
                (attr, re.escape(unicode(getattr(self, attr))))
 
712
                for attr in
 
713
                self.runtime_expansions)
 
714
            try:
 
715
                command = self.checker_command % escaped_attrs
 
716
            except TypeError as error:
 
717
                logger.error('Could not format string "%s"',
 
718
                             self.checker_command, exc_info=error)
 
719
                return True # Try again later
 
720
            self.current_checker_command = command
 
721
            try:
 
722
                logger.info("Starting checker %r for %s",
343
723
                            command, self.name)
344
724
                # We don't need to redirect stdout and stderr, since
345
725
                # in normal mode, that is already done by daemon(),
346
726
                # and in debug mode we don't want to.  (Stdin is
347
727
                # always replaced by /dev/null.)
 
728
                # The exception is when not debugging but nevertheless
 
729
                # running in the foreground; use the previously
 
730
                # created wnull.
 
731
                popen_args = {}
 
732
                if (not self.server_settings["debug"]
 
733
                    and self.server_settings["foreground"]):
 
734
                    popen_args.update({"stdout": wnull,
 
735
                                       "stderr": wnull })
348
736
                self.checker = subprocess.Popen(command,
349
737
                                                close_fds=True,
350
 
                                                shell=True, cwd="/")
351
 
                self.checker_callback_tag = gobject.child_watch_add\
352
 
                                            (self.checker.pid,
353
 
                                             self.checker_callback)
354
 
            except OSError, error:
355
 
                logger.error(u"Failed to start subprocess: %s",
356
 
                             error)
 
738
                                                shell=True, cwd="/",
 
739
                                                **popen_args)
 
740
            except OSError as error:
 
741
                logger.error("Failed to start subprocess",
 
742
                             exc_info=error)
 
743
                return True
 
744
            self.checker_callback_tag = (gobject.child_watch_add
 
745
                                         (self.checker.pid,
 
746
                                          self.checker_callback,
 
747
                                          data=command))
 
748
            # The checker may have completed before the gobject
 
749
            # watch was added.  Check for this.
 
750
            try:
 
751
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
 
752
            except OSError as error:
 
753
                if error.errno == errno.ECHILD:
 
754
                    # This should never happen
 
755
                    logger.error("Child process vanished",
 
756
                                 exc_info=error)
 
757
                    return True
 
758
                raise
 
759
            if pid:
 
760
                gobject.source_remove(self.checker_callback_tag)
 
761
                self.checker_callback(pid, status, command)
357
762
        # Re-run this periodically if run by gobject.timeout_add
358
763
        return True
 
764
    
359
765
    def stop_checker(self):
360
766
        """Force the checker process, if any, to stop."""
361
767
        if self.checker_callback_tag:
363
769
            self.checker_callback_tag = None
364
770
        if getattr(self, "checker", None) is None:
365
771
            return
366
 
        logger.debug(u"Stopping checker for %(name)s", vars(self))
 
772
        logger.debug("Stopping checker for %(name)s", vars(self))
367
773
        try:
368
 
            os.kill(self.checker.pid, signal.SIGTERM)
369
 
            #os.sleep(0.5)
 
774
            self.checker.terminate()
 
775
            #time.sleep(0.5)
370
776
            #if self.checker.poll() is None:
371
 
            #    os.kill(self.checker.pid, signal.SIGKILL)
372
 
        except OSError, error:
 
777
            #    self.checker.kill()
 
778
        except OSError as error:
373
779
            if error.errno != errno.ESRCH: # No such process
374
780
                raise
375
781
        self.checker = None
376
 
    def still_valid(self):
377
 
        """Has the timeout not yet passed for this client?"""
378
 
        now = datetime.datetime.now()
379
 
        if self.last_checked_ok is None:
380
 
            return now < (self.created + self.timeout)
381
 
        else:
382
 
            return now < (self.last_checked_ok + self.timeout)
383
 
 
384
 
 
385
 
def peer_certificate(session):
386
 
    "Return the peer's OpenPGP certificate as a bytestring"
387
 
    # If not an OpenPGP certificate...
388
 
    if gnutls.library.functions.gnutls_certificate_type_get\
389
 
            (session._c_object) \
390
 
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
391
 
        # ...do the normal thing
392
 
        return session.peer_certificate
393
 
    list_size = ctypes.c_uint()
394
 
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
395
 
        (session._c_object, ctypes.byref(list_size))
396
 
    if list_size.value == 0:
397
 
        return None
398
 
    cert = cert_list[0]
399
 
    return ctypes.string_at(cert.data, cert.size)
400
 
 
401
 
 
402
 
def fingerprint(openpgp):
403
 
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
404
 
    # New GnuTLS "datum" with the OpenPGP public key
405
 
    datum = gnutls.library.types.gnutls_datum_t\
406
 
        (ctypes.cast(ctypes.c_char_p(openpgp),
407
 
                     ctypes.POINTER(ctypes.c_ubyte)),
408
 
         ctypes.c_uint(len(openpgp)))
409
 
    # New empty GnuTLS certificate
410
 
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
411
 
    gnutls.library.functions.gnutls_openpgp_crt_init\
412
 
        (ctypes.byref(crt))
413
 
    # Import the OpenPGP public key into the certificate
414
 
    gnutls.library.functions.gnutls_openpgp_crt_import\
415
 
                    (crt, ctypes.byref(datum),
416
 
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
417
 
    # Verify the self signature in the key
418
 
    crtverify = ctypes.c_uint();
419
 
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
420
 
        (crt, 0, ctypes.byref(crtverify))
421
 
    if crtverify.value != 0:
422
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
423
 
        raise gnutls.errors.CertificateSecurityError("Verify failed")
424
 
    # New buffer for the fingerprint
425
 
    buffer = ctypes.create_string_buffer(20)
426
 
    buffer_length = ctypes.c_size_t()
427
 
    # Get the fingerprint from the certificate into the buffer
428
 
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
429
 
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
430
 
    # Deinit the certificate
431
 
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
432
 
    # Convert the buffer to a Python bytestring
433
 
    fpr = ctypes.string_at(buffer, buffer_length.value)
434
 
    # Convert the bytestring to hexadecimal notation
435
 
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
436
 
    return hex_fpr
437
 
 
438
 
 
439
 
class tcp_handler(SocketServer.BaseRequestHandler, object):
440
 
    """A TCP request handler class.
441
 
    Instantiated by IPv6_TCPServer for each request to handle it.
 
782
 
 
783
 
 
784
def dbus_service_property(dbus_interface, signature="v",
 
785
                          access="readwrite", byte_arrays=False):
 
786
    """Decorators for marking methods of a DBusObjectWithProperties to
 
787
    become properties on the D-Bus.
 
788
    
 
789
    The decorated method will be called with no arguments by "Get"
 
790
    and with one argument by "Set".
 
791
    
 
792
    The parameters, where they are supported, are the same as
 
793
    dbus.service.method, except there is only "signature", since the
 
794
    type from Get() and the type sent to Set() is the same.
 
795
    """
 
796
    # Encoding deeply encoded byte arrays is not supported yet by the
 
797
    # "Set" method, so we fail early here:
 
798
    if byte_arrays and signature != "ay":
 
799
        raise ValueError("Byte arrays not supported for non-'ay'"
 
800
                         " signature {0!r}".format(signature))
 
801
    def decorator(func):
 
802
        func._dbus_is_property = True
 
803
        func._dbus_interface = dbus_interface
 
804
        func._dbus_signature = signature
 
805
        func._dbus_access = access
 
806
        func._dbus_name = func.__name__
 
807
        if func._dbus_name.endswith("_dbus_property"):
 
808
            func._dbus_name = func._dbus_name[:-14]
 
809
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
 
810
        return func
 
811
    return decorator
 
812
 
 
813
 
 
814
def dbus_interface_annotations(dbus_interface):
 
815
    """Decorator for marking functions returning interface annotations
 
816
    
 
817
    Usage:
 
818
    
 
819
    @dbus_interface_annotations("org.example.Interface")
 
820
    def _foo(self):  # Function name does not matter
 
821
        return {"org.freedesktop.DBus.Deprecated": "true",
 
822
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
 
823
                    "false"}
 
824
    """
 
825
    def decorator(func):
 
826
        func._dbus_is_interface = True
 
827
        func._dbus_interface = dbus_interface
 
828
        func._dbus_name = dbus_interface
 
829
        return func
 
830
    return decorator
 
831
 
 
832
 
 
833
def dbus_annotations(annotations):
 
834
    """Decorator to annotate D-Bus methods, signals or properties
 
835
    Usage:
 
836
    
 
837
    @dbus_service_property("org.example.Interface", signature="b",
 
838
                           access="r")
 
839
    @dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
 
840
                        "org.freedesktop.DBus.Property."
 
841
                        "EmitsChangedSignal": "false"})
 
842
    def Property_dbus_property(self):
 
843
        return dbus.Boolean(False)
 
844
    """
 
845
    def decorator(func):
 
846
        func._dbus_annotations = annotations
 
847
        return func
 
848
    return decorator
 
849
 
 
850
 
 
851
class DBusPropertyException(dbus.exceptions.DBusException):
 
852
    """A base class for D-Bus property-related exceptions
 
853
    """
 
854
    def __unicode__(self):
 
855
        return unicode(str(self))
 
856
 
 
857
 
 
858
class DBusPropertyAccessException(DBusPropertyException):
 
859
    """A property's access permissions disallows an operation.
 
860
    """
 
861
    pass
 
862
 
 
863
 
 
864
class DBusPropertyNotFound(DBusPropertyException):
 
865
    """An attempt was made to access a non-existing property.
 
866
    """
 
867
    pass
 
868
 
 
869
 
 
870
class DBusObjectWithProperties(dbus.service.Object):
 
871
    """A D-Bus object with properties.
 
872
    
 
873
    Classes inheriting from this can use the dbus_service_property
 
874
    decorator to expose methods as D-Bus properties.  It exposes the
 
875
    standard Get(), Set(), and GetAll() methods on the D-Bus.
 
876
    """
 
877
    
 
878
    @staticmethod
 
879
    def _is_dbus_thing(thing):
 
880
        """Returns a function testing if an attribute is a D-Bus thing
 
881
        
 
882
        If called like _is_dbus_thing("method") it returns a function
 
883
        suitable for use as predicate to inspect.getmembers().
 
884
        """
 
885
        return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
 
886
                                   False)
 
887
    
 
888
    def _get_all_dbus_things(self, thing):
 
889
        """Returns a generator of (name, attribute) pairs
 
890
        """
 
891
        return ((getattr(athing.__get__(self), "_dbus_name",
 
892
                         name),
 
893
                 athing.__get__(self))
 
894
                for cls in self.__class__.__mro__
 
895
                for name, athing in
 
896
                inspect.getmembers(cls,
 
897
                                   self._is_dbus_thing(thing)))
 
898
    
 
899
    def _get_dbus_property(self, interface_name, property_name):
 
900
        """Returns a bound method if one exists which is a D-Bus
 
901
        property with the specified name and interface.
 
902
        """
 
903
        for cls in  self.__class__.__mro__:
 
904
            for name, value in (inspect.getmembers
 
905
                                (cls,
 
906
                                 self._is_dbus_thing("property"))):
 
907
                if (value._dbus_name == property_name
 
908
                    and value._dbus_interface == interface_name):
 
909
                    return value.__get__(self)
 
910
        
 
911
        # No such property
 
912
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
 
913
                                   + interface_name + "."
 
914
                                   + property_name)
 
915
    
 
916
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
 
917
                         out_signature="v")
 
918
    def Get(self, interface_name, property_name):
 
919
        """Standard D-Bus property Get() method, see D-Bus standard.
 
920
        """
 
921
        prop = self._get_dbus_property(interface_name, property_name)
 
922
        if prop._dbus_access == "write":
 
923
            raise DBusPropertyAccessException(property_name)
 
924
        value = prop()
 
925
        if not hasattr(value, "variant_level"):
 
926
            return value
 
927
        return type(value)(value, variant_level=value.variant_level+1)
 
928
    
 
929
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
 
930
    def Set(self, interface_name, property_name, value):
 
931
        """Standard D-Bus property Set() method, see D-Bus standard.
 
932
        """
 
933
        prop = self._get_dbus_property(interface_name, property_name)
 
934
        if prop._dbus_access == "read":
 
935
            raise DBusPropertyAccessException(property_name)
 
936
        if prop._dbus_get_args_options["byte_arrays"]:
 
937
            # The byte_arrays option is not supported yet on
 
938
            # signatures other than "ay".
 
939
            if prop._dbus_signature != "ay":
 
940
                raise ValueError("Byte arrays not supported for non-"
 
941
                                 "'ay' signature {0!r}"
 
942
                                 .format(prop._dbus_signature))
 
943
            value = dbus.ByteArray(b''.join(chr(byte)
 
944
                                            for byte in value))
 
945
        prop(value)
 
946
    
 
947
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
 
948
                         out_signature="a{sv}")
 
949
    def GetAll(self, interface_name):
 
950
        """Standard D-Bus property GetAll() method, see D-Bus
 
951
        standard.
 
952
        
 
953
        Note: Will not include properties with access="write".
 
954
        """
 
955
        properties = {}
 
956
        for name, prop in self._get_all_dbus_things("property"):
 
957
            if (interface_name
 
958
                and interface_name != prop._dbus_interface):
 
959
                # Interface non-empty but did not match
 
960
                continue
 
961
            # Ignore write-only properties
 
962
            if prop._dbus_access == "write":
 
963
                continue
 
964
            value = prop()
 
965
            if not hasattr(value, "variant_level"):
 
966
                properties[name] = value
 
967
                continue
 
968
            properties[name] = type(value)(value, variant_level=
 
969
                                           value.variant_level+1)
 
970
        return dbus.Dictionary(properties, signature="sv")
 
971
    
 
972
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
973
                         out_signature="s",
 
974
                         path_keyword='object_path',
 
975
                         connection_keyword='connection')
 
976
    def Introspect(self, object_path, connection):
 
977
        """Overloading of standard D-Bus method.
 
978
        
 
979
        Inserts property tags and interface annotation tags.
 
980
        """
 
981
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
982
                                                   connection)
 
983
        try:
 
984
            document = xml.dom.minidom.parseString(xmlstring)
 
985
            def make_tag(document, name, prop):
 
986
                e = document.createElement("property")
 
987
                e.setAttribute("name", name)
 
988
                e.setAttribute("type", prop._dbus_signature)
 
989
                e.setAttribute("access", prop._dbus_access)
 
990
                return e
 
991
            for if_tag in document.getElementsByTagName("interface"):
 
992
                # Add property tags
 
993
                for tag in (make_tag(document, name, prop)
 
994
                            for name, prop
 
995
                            in self._get_all_dbus_things("property")
 
996
                            if prop._dbus_interface
 
997
                            == if_tag.getAttribute("name")):
 
998
                    if_tag.appendChild(tag)
 
999
                # Add annotation tags
 
1000
                for typ in ("method", "signal", "property"):
 
1001
                    for tag in if_tag.getElementsByTagName(typ):
 
1002
                        annots = dict()
 
1003
                        for name, prop in (self.
 
1004
                                           _get_all_dbus_things(typ)):
 
1005
                            if (name == tag.getAttribute("name")
 
1006
                                and prop._dbus_interface
 
1007
                                == if_tag.getAttribute("name")):
 
1008
                                annots.update(getattr
 
1009
                                              (prop,
 
1010
                                               "_dbus_annotations",
 
1011
                                               {}))
 
1012
                        for name, value in annots.iteritems():
 
1013
                            ann_tag = document.createElement(
 
1014
                                "annotation")
 
1015
                            ann_tag.setAttribute("name", name)
 
1016
                            ann_tag.setAttribute("value", value)
 
1017
                            tag.appendChild(ann_tag)
 
1018
                # Add interface annotation tags
 
1019
                for annotation, value in dict(
 
1020
                    itertools.chain.from_iterable(
 
1021
                        annotations().iteritems()
 
1022
                        for name, annotations in
 
1023
                        self._get_all_dbus_things("interface")
 
1024
                        if name == if_tag.getAttribute("name")
 
1025
                        )).iteritems():
 
1026
                    ann_tag = document.createElement("annotation")
 
1027
                    ann_tag.setAttribute("name", annotation)
 
1028
                    ann_tag.setAttribute("value", value)
 
1029
                    if_tag.appendChild(ann_tag)
 
1030
                # Add the names to the return values for the
 
1031
                # "org.freedesktop.DBus.Properties" methods
 
1032
                if (if_tag.getAttribute("name")
 
1033
                    == "org.freedesktop.DBus.Properties"):
 
1034
                    for cn in if_tag.getElementsByTagName("method"):
 
1035
                        if cn.getAttribute("name") == "Get":
 
1036
                            for arg in cn.getElementsByTagName("arg"):
 
1037
                                if (arg.getAttribute("direction")
 
1038
                                    == "out"):
 
1039
                                    arg.setAttribute("name", "value")
 
1040
                        elif cn.getAttribute("name") == "GetAll":
 
1041
                            for arg in cn.getElementsByTagName("arg"):
 
1042
                                if (arg.getAttribute("direction")
 
1043
                                    == "out"):
 
1044
                                    arg.setAttribute("name", "props")
 
1045
            xmlstring = document.toxml("utf-8")
 
1046
            document.unlink()
 
1047
        except (AttributeError, xml.dom.DOMException,
 
1048
                xml.parsers.expat.ExpatError) as error:
 
1049
            logger.error("Failed to override Introspection method",
 
1050
                         exc_info=error)
 
1051
        return xmlstring
 
1052
 
 
1053
 
 
1054
def datetime_to_dbus(dt, variant_level=0):
 
1055
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
1056
    if dt is None:
 
1057
        return dbus.String("", variant_level = variant_level)
 
1058
    return dbus.String(dt.isoformat(),
 
1059
                       variant_level=variant_level)
 
1060
 
 
1061
 
 
1062
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
 
1063
    """A class decorator; applied to a subclass of
 
1064
    dbus.service.Object, it will add alternate D-Bus attributes with
 
1065
    interface names according to the "alt_interface_names" mapping.
 
1066
    Usage:
 
1067
    
 
1068
    @alternate_dbus_interfaces({"org.example.Interface":
 
1069
                                    "net.example.AlternateInterface"})
 
1070
    class SampleDBusObject(dbus.service.Object):
 
1071
        @dbus.service.method("org.example.Interface")
 
1072
        def SampleDBusMethod():
 
1073
            pass
 
1074
    
 
1075
    The above "SampleDBusMethod" on "SampleDBusObject" will be
 
1076
    reachable via two interfaces: "org.example.Interface" and
 
1077
    "net.example.AlternateInterface", the latter of which will have
 
1078
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
 
1079
    "true", unless "deprecate" is passed with a False value.
 
1080
    
 
1081
    This works for methods and signals, and also for D-Bus properties
 
1082
    (from DBusObjectWithProperties) and interfaces (from the
 
1083
    dbus_interface_annotations decorator).
 
1084
    """
 
1085
    def wrapper(cls):
 
1086
        for orig_interface_name, alt_interface_name in (
 
1087
            alt_interface_names.iteritems()):
 
1088
            attr = {}
 
1089
            interface_names = set()
 
1090
            # Go though all attributes of the class
 
1091
            for attrname, attribute in inspect.getmembers(cls):
 
1092
                # Ignore non-D-Bus attributes, and D-Bus attributes
 
1093
                # with the wrong interface name
 
1094
                if (not hasattr(attribute, "_dbus_interface")
 
1095
                    or not attribute._dbus_interface
 
1096
                    .startswith(orig_interface_name)):
 
1097
                    continue
 
1098
                # Create an alternate D-Bus interface name based on
 
1099
                # the current name
 
1100
                alt_interface = (attribute._dbus_interface
 
1101
                                 .replace(orig_interface_name,
 
1102
                                          alt_interface_name))
 
1103
                interface_names.add(alt_interface)
 
1104
                # Is this a D-Bus signal?
 
1105
                if getattr(attribute, "_dbus_is_signal", False):
 
1106
                    # Extract the original non-method undecorated
 
1107
                    # function by black magic
 
1108
                    nonmethod_func = (dict(
 
1109
                            zip(attribute.func_code.co_freevars,
 
1110
                                attribute.__closure__))["func"]
 
1111
                                      .cell_contents)
 
1112
                    # Create a new, but exactly alike, function
 
1113
                    # object, and decorate it to be a new D-Bus signal
 
1114
                    # with the alternate D-Bus interface name
 
1115
                    new_function = (dbus.service.signal
 
1116
                                    (alt_interface,
 
1117
                                     attribute._dbus_signature)
 
1118
                                    (types.FunctionType(
 
1119
                                nonmethod_func.func_code,
 
1120
                                nonmethod_func.func_globals,
 
1121
                                nonmethod_func.func_name,
 
1122
                                nonmethod_func.func_defaults,
 
1123
                                nonmethod_func.func_closure)))
 
1124
                    # Copy annotations, if any
 
1125
                    try:
 
1126
                        new_function._dbus_annotations = (
 
1127
                            dict(attribute._dbus_annotations))
 
1128
                    except AttributeError:
 
1129
                        pass
 
1130
                    # Define a creator of a function to call both the
 
1131
                    # original and alternate functions, so both the
 
1132
                    # original and alternate signals gets sent when
 
1133
                    # the function is called
 
1134
                    def fixscope(func1, func2):
 
1135
                        """This function is a scope container to pass
 
1136
                        func1 and func2 to the "call_both" function
 
1137
                        outside of its arguments"""
 
1138
                        def call_both(*args, **kwargs):
 
1139
                            """This function will emit two D-Bus
 
1140
                            signals by calling func1 and func2"""
 
1141
                            func1(*args, **kwargs)
 
1142
                            func2(*args, **kwargs)
 
1143
                        return call_both
 
1144
                    # Create the "call_both" function and add it to
 
1145
                    # the class
 
1146
                    attr[attrname] = fixscope(attribute, new_function)
 
1147
                # Is this a D-Bus method?
 
1148
                elif getattr(attribute, "_dbus_is_method", False):
 
1149
                    # Create a new, but exactly alike, function
 
1150
                    # object.  Decorate it to be a new D-Bus method
 
1151
                    # with the alternate D-Bus interface name.  Add it
 
1152
                    # to the class.
 
1153
                    attr[attrname] = (dbus.service.method
 
1154
                                      (alt_interface,
 
1155
                                       attribute._dbus_in_signature,
 
1156
                                       attribute._dbus_out_signature)
 
1157
                                      (types.FunctionType
 
1158
                                       (attribute.func_code,
 
1159
                                        attribute.func_globals,
 
1160
                                        attribute.func_name,
 
1161
                                        attribute.func_defaults,
 
1162
                                        attribute.func_closure)))
 
1163
                    # Copy annotations, if any
 
1164
                    try:
 
1165
                        attr[attrname]._dbus_annotations = (
 
1166
                            dict(attribute._dbus_annotations))
 
1167
                    except AttributeError:
 
1168
                        pass
 
1169
                # Is this a D-Bus property?
 
1170
                elif getattr(attribute, "_dbus_is_property", False):
 
1171
                    # Create a new, but exactly alike, function
 
1172
                    # object, and decorate it to be a new D-Bus
 
1173
                    # property with the alternate D-Bus interface
 
1174
                    # name.  Add it to the class.
 
1175
                    attr[attrname] = (dbus_service_property
 
1176
                                      (alt_interface,
 
1177
                                       attribute._dbus_signature,
 
1178
                                       attribute._dbus_access,
 
1179
                                       attribute
 
1180
                                       ._dbus_get_args_options
 
1181
                                       ["byte_arrays"])
 
1182
                                      (types.FunctionType
 
1183
                                       (attribute.func_code,
 
1184
                                        attribute.func_globals,
 
1185
                                        attribute.func_name,
 
1186
                                        attribute.func_defaults,
 
1187
                                        attribute.func_closure)))
 
1188
                    # Copy annotations, if any
 
1189
                    try:
 
1190
                        attr[attrname]._dbus_annotations = (
 
1191
                            dict(attribute._dbus_annotations))
 
1192
                    except AttributeError:
 
1193
                        pass
 
1194
                # Is this a D-Bus interface?
 
1195
                elif getattr(attribute, "_dbus_is_interface", False):
 
1196
                    # Create a new, but exactly alike, function
 
1197
                    # object.  Decorate it to be a new D-Bus interface
 
1198
                    # with the alternate D-Bus interface name.  Add it
 
1199
                    # to the class.
 
1200
                    attr[attrname] = (dbus_interface_annotations
 
1201
                                      (alt_interface)
 
1202
                                      (types.FunctionType
 
1203
                                       (attribute.func_code,
 
1204
                                        attribute.func_globals,
 
1205
                                        attribute.func_name,
 
1206
                                        attribute.func_defaults,
 
1207
                                        attribute.func_closure)))
 
1208
            if deprecate:
 
1209
                # Deprecate all alternate interfaces
 
1210
                iname="_AlternateDBusNames_interface_annotation{0}"
 
1211
                for interface_name in interface_names:
 
1212
                    @dbus_interface_annotations(interface_name)
 
1213
                    def func(self):
 
1214
                        return { "org.freedesktop.DBus.Deprecated":
 
1215
                                     "true" }
 
1216
                    # Find an unused name
 
1217
                    for aname in (iname.format(i)
 
1218
                                  for i in itertools.count()):
 
1219
                        if aname not in attr:
 
1220
                            attr[aname] = func
 
1221
                            break
 
1222
            if interface_names:
 
1223
                # Replace the class with a new subclass of it with
 
1224
                # methods, signals, etc. as created above.
 
1225
                cls = type(b"{0}Alternate".format(cls.__name__),
 
1226
                           (cls,), attr)
 
1227
        return cls
 
1228
    return wrapper
 
1229
 
 
1230
 
 
1231
@alternate_dbus_interfaces({"se.recompile.Mandos":
 
1232
                                "se.bsnet.fukt.Mandos"})
 
1233
class ClientDBus(Client, DBusObjectWithProperties):
 
1234
    """A Client class using D-Bus
 
1235
    
 
1236
    Attributes:
 
1237
    dbus_object_path: dbus.ObjectPath
 
1238
    bus: dbus.SystemBus()
 
1239
    """
 
1240
    
 
1241
    runtime_expansions = (Client.runtime_expansions
 
1242
                          + ("dbus_object_path",))
 
1243
    
 
1244
    # dbus.service.Object doesn't use super(), so we can't either.
 
1245
    
 
1246
    def __init__(self, bus = None, *args, **kwargs):
 
1247
        self.bus = bus
 
1248
        Client.__init__(self, *args, **kwargs)
 
1249
        # Only now, when this client is initialized, can it show up on
 
1250
        # the D-Bus
 
1251
        client_object_name = unicode(self.name).translate(
 
1252
            {ord("."): ord("_"),
 
1253
             ord("-"): ord("_")})
 
1254
        self.dbus_object_path = (dbus.ObjectPath
 
1255
                                 ("/clients/" + client_object_name))
 
1256
        DBusObjectWithProperties.__init__(self, self.bus,
 
1257
                                          self.dbus_object_path)
 
1258
    
 
1259
    def notifychangeproperty(transform_func,
 
1260
                             dbus_name, type_func=lambda x: x,
 
1261
                             variant_level=1):
 
1262
        """ Modify a variable so that it's a property which announces
 
1263
        its changes to DBus.
 
1264
        
 
1265
        transform_fun: Function that takes a value and a variant_level
 
1266
                       and transforms it to a D-Bus type.
 
1267
        dbus_name: D-Bus name of the variable
 
1268
        type_func: Function that transform the value before sending it
 
1269
                   to the D-Bus.  Default: no transform
 
1270
        variant_level: D-Bus variant level.  Default: 1
 
1271
        """
 
1272
        attrname = "_{0}".format(dbus_name)
 
1273
        def setter(self, value):
 
1274
            if hasattr(self, "dbus_object_path"):
 
1275
                if (not hasattr(self, attrname) or
 
1276
                    type_func(getattr(self, attrname, None))
 
1277
                    != type_func(value)):
 
1278
                    dbus_value = transform_func(type_func(value),
 
1279
                                                variant_level
 
1280
                                                =variant_level)
 
1281
                    self.PropertyChanged(dbus.String(dbus_name),
 
1282
                                         dbus_value)
 
1283
            setattr(self, attrname, value)
 
1284
        
 
1285
        return property(lambda self: getattr(self, attrname), setter)
 
1286
    
 
1287
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
 
1288
    approvals_pending = notifychangeproperty(dbus.Boolean,
 
1289
                                             "ApprovalPending",
 
1290
                                             type_func = bool)
 
1291
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
 
1292
    last_enabled = notifychangeproperty(datetime_to_dbus,
 
1293
                                        "LastEnabled")
 
1294
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
 
1295
                                   type_func = lambda checker:
 
1296
                                       checker is not None)
 
1297
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
 
1298
                                           "LastCheckedOK")
 
1299
    last_checker_status = notifychangeproperty(dbus.Int16,
 
1300
                                               "LastCheckerStatus")
 
1301
    last_approval_request = notifychangeproperty(
 
1302
        datetime_to_dbus, "LastApprovalRequest")
 
1303
    approved_by_default = notifychangeproperty(dbus.Boolean,
 
1304
                                               "ApprovedByDefault")
 
1305
    approval_delay = notifychangeproperty(dbus.UInt64,
 
1306
                                          "ApprovalDelay",
 
1307
                                          type_func =
 
1308
                                          timedelta_to_milliseconds)
 
1309
    approval_duration = notifychangeproperty(
 
1310
        dbus.UInt64, "ApprovalDuration",
 
1311
        type_func = timedelta_to_milliseconds)
 
1312
    host = notifychangeproperty(dbus.String, "Host")
 
1313
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
 
1314
                                   type_func =
 
1315
                                   timedelta_to_milliseconds)
 
1316
    extended_timeout = notifychangeproperty(
 
1317
        dbus.UInt64, "ExtendedTimeout",
 
1318
        type_func = timedelta_to_milliseconds)
 
1319
    interval = notifychangeproperty(dbus.UInt64,
 
1320
                                    "Interval",
 
1321
                                    type_func =
 
1322
                                    timedelta_to_milliseconds)
 
1323
    checker_command = notifychangeproperty(dbus.String, "Checker")
 
1324
    
 
1325
    del notifychangeproperty
 
1326
    
 
1327
    def __del__(self, *args, **kwargs):
 
1328
        try:
 
1329
            self.remove_from_connection()
 
1330
        except LookupError:
 
1331
            pass
 
1332
        if hasattr(DBusObjectWithProperties, "__del__"):
 
1333
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
 
1334
        Client.__del__(self, *args, **kwargs)
 
1335
    
 
1336
    def checker_callback(self, pid, condition, command,
 
1337
                         *args, **kwargs):
 
1338
        self.checker_callback_tag = None
 
1339
        self.checker = None
 
1340
        if os.WIFEXITED(condition):
 
1341
            exitstatus = os.WEXITSTATUS(condition)
 
1342
            # Emit D-Bus signal
 
1343
            self.CheckerCompleted(dbus.Int16(exitstatus),
 
1344
                                  dbus.Int64(condition),
 
1345
                                  dbus.String(command))
 
1346
        else:
 
1347
            # Emit D-Bus signal
 
1348
            self.CheckerCompleted(dbus.Int16(-1),
 
1349
                                  dbus.Int64(condition),
 
1350
                                  dbus.String(command))
 
1351
        
 
1352
        return Client.checker_callback(self, pid, condition, command,
 
1353
                                       *args, **kwargs)
 
1354
    
 
1355
    def start_checker(self, *args, **kwargs):
 
1356
        old_checker_pid = getattr(self.checker, "pid", None)
 
1357
        r = Client.start_checker(self, *args, **kwargs)
 
1358
        # Only if new checker process was started
 
1359
        if (self.checker is not None
 
1360
            and old_checker_pid != self.checker.pid):
 
1361
            # Emit D-Bus signal
 
1362
            self.CheckerStarted(self.current_checker_command)
 
1363
        return r
 
1364
    
 
1365
    def _reset_approved(self):
 
1366
        self.approved = None
 
1367
        return False
 
1368
    
 
1369
    def approve(self, value=True):
 
1370
        self.approved = value
 
1371
        gobject.timeout_add(timedelta_to_milliseconds
 
1372
                            (self.approval_duration),
 
1373
                            self._reset_approved)
 
1374
        self.send_changedstate()
 
1375
    
 
1376
    ## D-Bus methods, signals & properties
 
1377
    _interface = "se.recompile.Mandos.Client"
 
1378
    
 
1379
    ## Interfaces
 
1380
    
 
1381
    @dbus_interface_annotations(_interface)
 
1382
    def _foo(self):
 
1383
        return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
 
1384
                     "false"}
 
1385
    
 
1386
    ## Signals
 
1387
    
 
1388
    # CheckerCompleted - signal
 
1389
    @dbus.service.signal(_interface, signature="nxs")
 
1390
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
1391
        "D-Bus signal"
 
1392
        pass
 
1393
    
 
1394
    # CheckerStarted - signal
 
1395
    @dbus.service.signal(_interface, signature="s")
 
1396
    def CheckerStarted(self, command):
 
1397
        "D-Bus signal"
 
1398
        pass
 
1399
    
 
1400
    # PropertyChanged - signal
 
1401
    @dbus.service.signal(_interface, signature="sv")
 
1402
    def PropertyChanged(self, property, value):
 
1403
        "D-Bus signal"
 
1404
        pass
 
1405
    
 
1406
    # GotSecret - signal
 
1407
    @dbus.service.signal(_interface)
 
1408
    def GotSecret(self):
 
1409
        """D-Bus signal
 
1410
        Is sent after a successful transfer of secret from the Mandos
 
1411
        server to mandos-client
 
1412
        """
 
1413
        pass
 
1414
    
 
1415
    # Rejected - signal
 
1416
    @dbus.service.signal(_interface, signature="s")
 
1417
    def Rejected(self, reason):
 
1418
        "D-Bus signal"
 
1419
        pass
 
1420
    
 
1421
    # NeedApproval - signal
 
1422
    @dbus.service.signal(_interface, signature="tb")
 
1423
    def NeedApproval(self, timeout, default):
 
1424
        "D-Bus signal"
 
1425
        return self.need_approval()
 
1426
    
 
1427
    ## Methods
 
1428
    
 
1429
    # Approve - method
 
1430
    @dbus.service.method(_interface, in_signature="b")
 
1431
    def Approve(self, value):
 
1432
        self.approve(value)
 
1433
    
 
1434
    # CheckedOK - method
 
1435
    @dbus.service.method(_interface)
 
1436
    def CheckedOK(self):
 
1437
        self.checked_ok()
 
1438
    
 
1439
    # Enable - method
 
1440
    @dbus.service.method(_interface)
 
1441
    def Enable(self):
 
1442
        "D-Bus method"
 
1443
        self.enable()
 
1444
    
 
1445
    # StartChecker - method
 
1446
    @dbus.service.method(_interface)
 
1447
    def StartChecker(self):
 
1448
        "D-Bus method"
 
1449
        self.start_checker()
 
1450
    
 
1451
    # Disable - method
 
1452
    @dbus.service.method(_interface)
 
1453
    def Disable(self):
 
1454
        "D-Bus method"
 
1455
        self.disable()
 
1456
    
 
1457
    # StopChecker - method
 
1458
    @dbus.service.method(_interface)
 
1459
    def StopChecker(self):
 
1460
        self.stop_checker()
 
1461
    
 
1462
    ## Properties
 
1463
    
 
1464
    # ApprovalPending - property
 
1465
    @dbus_service_property(_interface, signature="b", access="read")
 
1466
    def ApprovalPending_dbus_property(self):
 
1467
        return dbus.Boolean(bool(self.approvals_pending))
 
1468
    
 
1469
    # ApprovedByDefault - property
 
1470
    @dbus_service_property(_interface, signature="b",
 
1471
                           access="readwrite")
 
1472
    def ApprovedByDefault_dbus_property(self, value=None):
 
1473
        if value is None:       # get
 
1474
            return dbus.Boolean(self.approved_by_default)
 
1475
        self.approved_by_default = bool(value)
 
1476
    
 
1477
    # ApprovalDelay - property
 
1478
    @dbus_service_property(_interface, signature="t",
 
1479
                           access="readwrite")
 
1480
    def ApprovalDelay_dbus_property(self, value=None):
 
1481
        if value is None:       # get
 
1482
            return dbus.UInt64(self.approval_delay_milliseconds())
 
1483
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
 
1484
    
 
1485
    # ApprovalDuration - property
 
1486
    @dbus_service_property(_interface, signature="t",
 
1487
                           access="readwrite")
 
1488
    def ApprovalDuration_dbus_property(self, value=None):
 
1489
        if value is None:       # get
 
1490
            return dbus.UInt64(timedelta_to_milliseconds(
 
1491
                    self.approval_duration))
 
1492
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
 
1493
    
 
1494
    # Name - property
 
1495
    @dbus_service_property(_interface, signature="s", access="read")
 
1496
    def Name_dbus_property(self):
 
1497
        return dbus.String(self.name)
 
1498
    
 
1499
    # Fingerprint - property
 
1500
    @dbus_service_property(_interface, signature="s", access="read")
 
1501
    def Fingerprint_dbus_property(self):
 
1502
        return dbus.String(self.fingerprint)
 
1503
    
 
1504
    # Host - property
 
1505
    @dbus_service_property(_interface, signature="s",
 
1506
                           access="readwrite")
 
1507
    def Host_dbus_property(self, value=None):
 
1508
        if value is None:       # get
 
1509
            return dbus.String(self.host)
 
1510
        self.host = unicode(value)
 
1511
    
 
1512
    # Created - property
 
1513
    @dbus_service_property(_interface, signature="s", access="read")
 
1514
    def Created_dbus_property(self):
 
1515
        return datetime_to_dbus(self.created)
 
1516
    
 
1517
    # LastEnabled - property
 
1518
    @dbus_service_property(_interface, signature="s", access="read")
 
1519
    def LastEnabled_dbus_property(self):
 
1520
        return datetime_to_dbus(self.last_enabled)
 
1521
    
 
1522
    # Enabled - property
 
1523
    @dbus_service_property(_interface, signature="b",
 
1524
                           access="readwrite")
 
1525
    def Enabled_dbus_property(self, value=None):
 
1526
        if value is None:       # get
 
1527
            return dbus.Boolean(self.enabled)
 
1528
        if value:
 
1529
            self.enable()
 
1530
        else:
 
1531
            self.disable()
 
1532
    
 
1533
    # LastCheckedOK - property
 
1534
    @dbus_service_property(_interface, signature="s",
 
1535
                           access="readwrite")
 
1536
    def LastCheckedOK_dbus_property(self, value=None):
 
1537
        if value is not None:
 
1538
            self.checked_ok()
 
1539
            return
 
1540
        return datetime_to_dbus(self.last_checked_ok)
 
1541
    
 
1542
    # LastCheckerStatus - property
 
1543
    @dbus_service_property(_interface, signature="n",
 
1544
                           access="read")
 
1545
    def LastCheckerStatus_dbus_property(self):
 
1546
        return dbus.Int16(self.last_checker_status)
 
1547
    
 
1548
    # Expires - property
 
1549
    @dbus_service_property(_interface, signature="s", access="read")
 
1550
    def Expires_dbus_property(self):
 
1551
        return datetime_to_dbus(self.expires)
 
1552
    
 
1553
    # LastApprovalRequest - property
 
1554
    @dbus_service_property(_interface, signature="s", access="read")
 
1555
    def LastApprovalRequest_dbus_property(self):
 
1556
        return datetime_to_dbus(self.last_approval_request)
 
1557
    
 
1558
    # Timeout - property
 
1559
    @dbus_service_property(_interface, signature="t",
 
1560
                           access="readwrite")
 
1561
    def Timeout_dbus_property(self, value=None):
 
1562
        if value is None:       # get
 
1563
            return dbus.UInt64(self.timeout_milliseconds())
 
1564
        old_timeout = self.timeout
 
1565
        self.timeout = datetime.timedelta(0, 0, 0, value)
 
1566
        # Reschedule disabling
 
1567
        if self.enabled:
 
1568
            now = datetime.datetime.utcnow()
 
1569
            self.expires += self.timeout - old_timeout
 
1570
            if self.expires <= now:
 
1571
                # The timeout has passed
 
1572
                self.disable()
 
1573
            else:
 
1574
                if (getattr(self, "disable_initiator_tag", None)
 
1575
                    is None):
 
1576
                    return
 
1577
                gobject.source_remove(self.disable_initiator_tag)
 
1578
                self.disable_initiator_tag = (
 
1579
                    gobject.timeout_add(
 
1580
                        timedelta_to_milliseconds(self.expires - now),
 
1581
                        self.disable))
 
1582
    
 
1583
    # ExtendedTimeout - property
 
1584
    @dbus_service_property(_interface, signature="t",
 
1585
                           access="readwrite")
 
1586
    def ExtendedTimeout_dbus_property(self, value=None):
 
1587
        if value is None:       # get
 
1588
            return dbus.UInt64(self.extended_timeout_milliseconds())
 
1589
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
 
1590
    
 
1591
    # Interval - property
 
1592
    @dbus_service_property(_interface, signature="t",
 
1593
                           access="readwrite")
 
1594
    def Interval_dbus_property(self, value=None):
 
1595
        if value is None:       # get
 
1596
            return dbus.UInt64(self.interval_milliseconds())
 
1597
        self.interval = datetime.timedelta(0, 0, 0, value)
 
1598
        if getattr(self, "checker_initiator_tag", None) is None:
 
1599
            return
 
1600
        if self.enabled:
 
1601
            # Reschedule checker run
 
1602
            gobject.source_remove(self.checker_initiator_tag)
 
1603
            self.checker_initiator_tag = (gobject.timeout_add
 
1604
                                          (value, self.start_checker))
 
1605
            self.start_checker()    # Start one now, too
 
1606
    
 
1607
    # Checker - property
 
1608
    @dbus_service_property(_interface, signature="s",
 
1609
                           access="readwrite")
 
1610
    def Checker_dbus_property(self, value=None):
 
1611
        if value is None:       # get
 
1612
            return dbus.String(self.checker_command)
 
1613
        self.checker_command = unicode(value)
 
1614
    
 
1615
    # CheckerRunning - property
 
1616
    @dbus_service_property(_interface, signature="b",
 
1617
                           access="readwrite")
 
1618
    def CheckerRunning_dbus_property(self, value=None):
 
1619
        if value is None:       # get
 
1620
            return dbus.Boolean(self.checker is not None)
 
1621
        if value:
 
1622
            self.start_checker()
 
1623
        else:
 
1624
            self.stop_checker()
 
1625
    
 
1626
    # ObjectPath - property
 
1627
    @dbus_service_property(_interface, signature="o", access="read")
 
1628
    def ObjectPath_dbus_property(self):
 
1629
        return self.dbus_object_path # is already a dbus.ObjectPath
 
1630
    
 
1631
    # Secret = property
 
1632
    @dbus_service_property(_interface, signature="ay",
 
1633
                           access="write", byte_arrays=True)
 
1634
    def Secret_dbus_property(self, value):
 
1635
        self.secret = str(value)
 
1636
    
 
1637
    del _interface
 
1638
 
 
1639
 
 
1640
class ProxyClient(object):
 
1641
    def __init__(self, child_pipe, fpr, address):
 
1642
        self._pipe = child_pipe
 
1643
        self._pipe.send(('init', fpr, address))
 
1644
        if not self._pipe.recv():
 
1645
            raise KeyError()
 
1646
    
 
1647
    def __getattribute__(self, name):
 
1648
        if name == '_pipe':
 
1649
            return super(ProxyClient, self).__getattribute__(name)
 
1650
        self._pipe.send(('getattr', name))
 
1651
        data = self._pipe.recv()
 
1652
        if data[0] == 'data':
 
1653
            return data[1]
 
1654
        if data[0] == 'function':
 
1655
            def func(*args, **kwargs):
 
1656
                self._pipe.send(('funcall', name, args, kwargs))
 
1657
                return self._pipe.recv()[1]
 
1658
            return func
 
1659
    
 
1660
    def __setattr__(self, name, value):
 
1661
        if name == '_pipe':
 
1662
            return super(ProxyClient, self).__setattr__(name, value)
 
1663
        self._pipe.send(('setattr', name, value))
 
1664
 
 
1665
 
 
1666
class ClientHandler(socketserver.BaseRequestHandler, object):
 
1667
    """A class to handle client connections.
 
1668
    
 
1669
    Instantiated once for each connection to handle it.
442
1670
    Note: This will run in its own forked process."""
443
1671
    
444
1672
    def handle(self):
445
 
        logger.info(u"TCP connection from: %s",
446
 
                     unicode(self.client_address))
447
 
        session = gnutls.connection.ClientSession\
448
 
                  (self.request, gnutls.connection.X509Credentials())
449
 
        
450
 
        line = self.request.makefile().readline()
451
 
        logger.debug(u"Protocol version: %r", line)
452
 
        try:
453
 
            if int(line.strip().split()[0]) > 1:
454
 
                raise RuntimeError
455
 
        except (ValueError, IndexError, RuntimeError), error:
456
 
            logger.error(u"Unknown protocol version: %s", error)
457
 
            return
458
 
        
459
 
        # Note: gnutls.connection.X509Credentials is really a generic
460
 
        # GnuTLS certificate credentials object so long as no X.509
461
 
        # keys are added to it.  Therefore, we can use it here despite
462
 
        # using OpenPGP certificates.
463
 
        
464
 
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
465
 
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
466
 
        #                "+DHE-DSS"))
467
 
        priority = "NORMAL"             # Fallback default, since this
468
 
                                        # MUST be set.
469
 
        if self.server.settings["priority"]:
470
 
            priority = self.server.settings["priority"]
471
 
        gnutls.library.functions.gnutls_priority_set_direct\
472
 
            (session._c_object, priority, None);
473
 
        
474
 
        try:
475
 
            session.handshake()
476
 
        except gnutls.errors.GNUTLSError, error:
477
 
            logger.warning(u"Handshake failed: %s", error)
478
 
            # Do not run session.bye() here: the session is not
479
 
            # established.  Just abandon the request.
480
 
            return
481
 
        try:
482
 
            fpr = fingerprint(peer_certificate(session))
483
 
        except (TypeError, gnutls.errors.GNUTLSError), error:
484
 
            logger.warning(u"Bad certificate: %s", error)
485
 
            session.bye()
486
 
            return
487
 
        logger.debug(u"Fingerprint: %s", fpr)
488
 
        client = None
489
 
        for c in self.server.clients:
490
 
            if c.fingerprint == fpr:
491
 
                client = c
492
 
                break
493
 
        if not client:
494
 
            logger.warning(u"Client not found for fingerprint: %s",
495
 
                           fpr)
496
 
            session.bye()
497
 
            return
498
 
        # Have to check if client.still_valid(), since it is possible
499
 
        # that the client timed out while establishing the GnuTLS
500
 
        # session.
501
 
        if not client.still_valid():
502
 
            logger.warning(u"Client %(name)s is invalid",
503
 
                           vars(client))
504
 
            session.bye()
505
 
            return
506
 
        sent_size = 0
507
 
        while sent_size < len(client.secret):
508
 
            sent = session.send(client.secret[sent_size:])
509
 
            logger.debug(u"Sent: %d, remaining: %d",
510
 
                         sent, len(client.secret)
511
 
                         - (sent_size + sent))
512
 
            sent_size += sent
513
 
        session.bye()
514
 
 
515
 
 
516
 
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
517
 
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
 
1673
        with contextlib.closing(self.server.child_pipe) as child_pipe:
 
1674
            logger.info("TCP connection from: %s",
 
1675
                        unicode(self.client_address))
 
1676
            logger.debug("Pipe FD: %d",
 
1677
                         self.server.child_pipe.fileno())
 
1678
            
 
1679
            session = (gnutls.connection
 
1680
                       .ClientSession(self.request,
 
1681
                                      gnutls.connection
 
1682
                                      .X509Credentials()))
 
1683
            
 
1684
            # Note: gnutls.connection.X509Credentials is really a
 
1685
            # generic GnuTLS certificate credentials object so long as
 
1686
            # no X.509 keys are added to it.  Therefore, we can use it
 
1687
            # here despite using OpenPGP certificates.
 
1688
            
 
1689
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
1690
            #                      "+AES-256-CBC", "+SHA1",
 
1691
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
 
1692
            #                      "+DHE-DSS"))
 
1693
            # Use a fallback default, since this MUST be set.
 
1694
            priority = self.server.gnutls_priority
 
1695
            if priority is None:
 
1696
                priority = "NORMAL"
 
1697
            (gnutls.library.functions
 
1698
             .gnutls_priority_set_direct(session._c_object,
 
1699
                                         priority, None))
 
1700
            
 
1701
            # Start communication using the Mandos protocol
 
1702
            # Get protocol number
 
1703
            line = self.request.makefile().readline()
 
1704
            logger.debug("Protocol version: %r", line)
 
1705
            try:
 
1706
                if int(line.strip().split()[0]) > 1:
 
1707
                    raise RuntimeError(line)
 
1708
            except (ValueError, IndexError, RuntimeError) as error:
 
1709
                logger.error("Unknown protocol version: %s", error)
 
1710
                return
 
1711
            
 
1712
            # Start GnuTLS connection
 
1713
            try:
 
1714
                session.handshake()
 
1715
            except gnutls.errors.GNUTLSError as error:
 
1716
                logger.warning("Handshake failed: %s", error)
 
1717
                # Do not run session.bye() here: the session is not
 
1718
                # established.  Just abandon the request.
 
1719
                return
 
1720
            logger.debug("Handshake succeeded")
 
1721
            
 
1722
            approval_required = False
 
1723
            try:
 
1724
                try:
 
1725
                    fpr = self.fingerprint(self.peer_certificate
 
1726
                                           (session))
 
1727
                except (TypeError,
 
1728
                        gnutls.errors.GNUTLSError) as error:
 
1729
                    logger.warning("Bad certificate: %s", error)
 
1730
                    return
 
1731
                logger.debug("Fingerprint: %s", fpr)
 
1732
                
 
1733
                try:
 
1734
                    client = ProxyClient(child_pipe, fpr,
 
1735
                                         self.client_address)
 
1736
                except KeyError:
 
1737
                    return
 
1738
                
 
1739
                if client.approval_delay:
 
1740
                    delay = client.approval_delay
 
1741
                    client.approvals_pending += 1
 
1742
                    approval_required = True
 
1743
                
 
1744
                while True:
 
1745
                    if not client.enabled:
 
1746
                        logger.info("Client %s is disabled",
 
1747
                                       client.name)
 
1748
                        if self.server.use_dbus:
 
1749
                            # Emit D-Bus signal
 
1750
                            client.Rejected("Disabled")
 
1751
                        return
 
1752
                    
 
1753
                    if client.approved or not client.approval_delay:
 
1754
                        #We are approved or approval is disabled
 
1755
                        break
 
1756
                    elif client.approved is None:
 
1757
                        logger.info("Client %s needs approval",
 
1758
                                    client.name)
 
1759
                        if self.server.use_dbus:
 
1760
                            # Emit D-Bus signal
 
1761
                            client.NeedApproval(
 
1762
                                client.approval_delay_milliseconds(),
 
1763
                                client.approved_by_default)
 
1764
                    else:
 
1765
                        logger.warning("Client %s was not approved",
 
1766
                                       client.name)
 
1767
                        if self.server.use_dbus:
 
1768
                            # Emit D-Bus signal
 
1769
                            client.Rejected("Denied")
 
1770
                        return
 
1771
                    
 
1772
                    #wait until timeout or approved
 
1773
                    time = datetime.datetime.now()
 
1774
                    client.changedstate.acquire()
 
1775
                    client.changedstate.wait(
 
1776
                        float(timedelta_to_milliseconds(delay)
 
1777
                              / 1000))
 
1778
                    client.changedstate.release()
 
1779
                    time2 = datetime.datetime.now()
 
1780
                    if (time2 - time) >= delay:
 
1781
                        if not client.approved_by_default:
 
1782
                            logger.warning("Client %s timed out while"
 
1783
                                           " waiting for approval",
 
1784
                                           client.name)
 
1785
                            if self.server.use_dbus:
 
1786
                                # Emit D-Bus signal
 
1787
                                client.Rejected("Approval timed out")
 
1788
                            return
 
1789
                        else:
 
1790
                            break
 
1791
                    else:
 
1792
                        delay -= time2 - time
 
1793
                
 
1794
                sent_size = 0
 
1795
                while sent_size < len(client.secret):
 
1796
                    try:
 
1797
                        sent = session.send(client.secret[sent_size:])
 
1798
                    except gnutls.errors.GNUTLSError as error:
 
1799
                        logger.warning("gnutls send failed",
 
1800
                                       exc_info=error)
 
1801
                        return
 
1802
                    logger.debug("Sent: %d, remaining: %d",
 
1803
                                 sent, len(client.secret)
 
1804
                                 - (sent_size + sent))
 
1805
                    sent_size += sent
 
1806
                
 
1807
                logger.info("Sending secret to %s", client.name)
 
1808
                # bump the timeout using extended_timeout
 
1809
                client.bump_timeout(client.extended_timeout)
 
1810
                if self.server.use_dbus:
 
1811
                    # Emit D-Bus signal
 
1812
                    client.GotSecret()
 
1813
            
 
1814
            finally:
 
1815
                if approval_required:
 
1816
                    client.approvals_pending -= 1
 
1817
                try:
 
1818
                    session.bye()
 
1819
                except gnutls.errors.GNUTLSError as error:
 
1820
                    logger.warning("GnuTLS bye failed",
 
1821
                                   exc_info=error)
 
1822
    
 
1823
    @staticmethod
 
1824
    def peer_certificate(session):
 
1825
        "Return the peer's OpenPGP certificate as a bytestring"
 
1826
        # If not an OpenPGP certificate...
 
1827
        if (gnutls.library.functions
 
1828
            .gnutls_certificate_type_get(session._c_object)
 
1829
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
1830
            # ...do the normal thing
 
1831
            return session.peer_certificate
 
1832
        list_size = ctypes.c_uint(1)
 
1833
        cert_list = (gnutls.library.functions
 
1834
                     .gnutls_certificate_get_peers
 
1835
                     (session._c_object, ctypes.byref(list_size)))
 
1836
        if not bool(cert_list) and list_size.value != 0:
 
1837
            raise gnutls.errors.GNUTLSError("error getting peer"
 
1838
                                            " certificate")
 
1839
        if list_size.value == 0:
 
1840
            return None
 
1841
        cert = cert_list[0]
 
1842
        return ctypes.string_at(cert.data, cert.size)
 
1843
    
 
1844
    @staticmethod
 
1845
    def fingerprint(openpgp):
 
1846
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
 
1847
        # New GnuTLS "datum" with the OpenPGP public key
 
1848
        datum = (gnutls.library.types
 
1849
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
1850
                                             ctypes.POINTER
 
1851
                                             (ctypes.c_ubyte)),
 
1852
                                 ctypes.c_uint(len(openpgp))))
 
1853
        # New empty GnuTLS certificate
 
1854
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
1855
        (gnutls.library.functions
 
1856
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
1857
        # Import the OpenPGP public key into the certificate
 
1858
        (gnutls.library.functions
 
1859
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
1860
                                    gnutls.library.constants
 
1861
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
1862
        # Verify the self signature in the key
 
1863
        crtverify = ctypes.c_uint()
 
1864
        (gnutls.library.functions
 
1865
         .gnutls_openpgp_crt_verify_self(crt, 0,
 
1866
                                         ctypes.byref(crtverify)))
 
1867
        if crtverify.value != 0:
 
1868
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
1869
            raise (gnutls.errors.CertificateSecurityError
 
1870
                   ("Verify failed"))
 
1871
        # New buffer for the fingerprint
 
1872
        buf = ctypes.create_string_buffer(20)
 
1873
        buf_len = ctypes.c_size_t()
 
1874
        # Get the fingerprint from the certificate into the buffer
 
1875
        (gnutls.library.functions
 
1876
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
1877
                                             ctypes.byref(buf_len)))
 
1878
        # Deinit the certificate
 
1879
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
1880
        # Convert the buffer to a Python bytestring
 
1881
        fpr = ctypes.string_at(buf, buf_len.value)
 
1882
        # Convert the bytestring to hexadecimal notation
 
1883
        hex_fpr = binascii.hexlify(fpr).upper()
 
1884
        return hex_fpr
 
1885
 
 
1886
 
 
1887
class MultiprocessingMixIn(object):
 
1888
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
1889
    def sub_process_main(self, request, address):
 
1890
        try:
 
1891
            self.finish_request(request, address)
 
1892
        except Exception:
 
1893
            self.handle_error(request, address)
 
1894
        self.close_request(request)
 
1895
    
 
1896
    def process_request(self, request, address):
 
1897
        """Start a new process to process the request."""
 
1898
        proc = multiprocessing.Process(target = self.sub_process_main,
 
1899
                                       args = (request, address))
 
1900
        proc.start()
 
1901
        return proc
 
1902
 
 
1903
 
 
1904
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
 
1905
    """ adds a pipe to the MixIn """
 
1906
    def process_request(self, request, client_address):
 
1907
        """Overrides and wraps the original process_request().
 
1908
        
 
1909
        This function creates a new pipe in self.pipe
 
1910
        """
 
1911
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
 
1912
        
 
1913
        proc = MultiprocessingMixIn.process_request(self, request,
 
1914
                                                    client_address)
 
1915
        self.child_pipe.close()
 
1916
        self.add_pipe(parent_pipe, proc)
 
1917
    
 
1918
    def add_pipe(self, parent_pipe, proc):
 
1919
        """Dummy function; override as necessary"""
 
1920
        raise NotImplementedError()
 
1921
 
 
1922
 
 
1923
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
 
1924
                     socketserver.TCPServer, object):
 
1925
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
1926
    
518
1927
    Attributes:
519
 
        settings:       Server settings
520
 
        clients:        Set() of Client objects
521
1928
        enabled:        Boolean; whether this server is activated yet
 
1929
        interface:      None or a network interface name (string)
 
1930
        use_ipv6:       Boolean; to use IPv6 or not
522
1931
    """
523
 
    address_family = socket.AF_INET6
524
 
    def __init__(self, *args, **kwargs):
525
 
        if "settings" in kwargs:
526
 
            self.settings = kwargs["settings"]
527
 
            del kwargs["settings"]
528
 
        if "clients" in kwargs:
529
 
            self.clients = kwargs["clients"]
530
 
            del kwargs["clients"]
531
 
        self.enabled = False
532
 
        return super(type(self), self).__init__(*args, **kwargs)
 
1932
    def __init__(self, server_address, RequestHandlerClass,
 
1933
                 interface=None, use_ipv6=True, socketfd=None):
 
1934
        """If socketfd is set, use that file descriptor instead of
 
1935
        creating a new one with socket.socket().
 
1936
        """
 
1937
        self.interface = interface
 
1938
        if use_ipv6:
 
1939
            self.address_family = socket.AF_INET6
 
1940
        if socketfd is not None:
 
1941
            # Save the file descriptor
 
1942
            self.socketfd = socketfd
 
1943
            # Save the original socket.socket() function
 
1944
            self.socket_socket = socket.socket
 
1945
            # To implement --socket, we monkey patch socket.socket.
 
1946
            # 
 
1947
            # (When socketserver.TCPServer is a new-style class, we
 
1948
            # could make self.socket into a property instead of monkey
 
1949
            # patching socket.socket.)
 
1950
            # 
 
1951
            # Create a one-time-only replacement for socket.socket()
 
1952
            @functools.wraps(socket.socket)
 
1953
            def socket_wrapper(*args, **kwargs):
 
1954
                # Restore original function so subsequent calls are
 
1955
                # not affected.
 
1956
                socket.socket = self.socket_socket
 
1957
                del self.socket_socket
 
1958
                # This time only, return a new socket object from the
 
1959
                # saved file descriptor.
 
1960
                return socket.fromfd(self.socketfd, *args, **kwargs)
 
1961
            # Replace socket.socket() function with wrapper
 
1962
            socket.socket = socket_wrapper
 
1963
        # The socketserver.TCPServer.__init__ will call
 
1964
        # socket.socket(), which might be our replacement,
 
1965
        # socket_wrapper(), if socketfd was set.
 
1966
        socketserver.TCPServer.__init__(self, server_address,
 
1967
                                        RequestHandlerClass)
 
1968
    
533
1969
    def server_bind(self):
534
1970
        """This overrides the normal server_bind() function
535
1971
        to bind to an interface if one was specified, and also NOT to
536
1972
        bind to an address or port if they were not specified."""
537
 
        if self.settings["interface"]:
538
 
            # 25 is from /usr/include/asm-i486/socket.h
539
 
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
540
 
            try:
541
 
                self.socket.setsockopt(socket.SOL_SOCKET,
542
 
                                       SO_BINDTODEVICE,
543
 
                                       self.settings["interface"])
544
 
            except socket.error, error:
545
 
                if error[0] == errno.EPERM:
546
 
                    logger.error(u"No permission to"
547
 
                                 u" bind to interface %s",
548
 
                                 self.settings["interface"])
549
 
                else:
550
 
                    raise error
 
1973
        if self.interface is not None:
 
1974
            if SO_BINDTODEVICE is None:
 
1975
                logger.error("SO_BINDTODEVICE does not exist;"
 
1976
                             " cannot bind to interface %s",
 
1977
                             self.interface)
 
1978
            else:
 
1979
                try:
 
1980
                    self.socket.setsockopt(socket.SOL_SOCKET,
 
1981
                                           SO_BINDTODEVICE,
 
1982
                                           str(self.interface + '\0'))
 
1983
                except socket.error as error:
 
1984
                    if error.errno == errno.EPERM:
 
1985
                        logger.error("No permission to bind to"
 
1986
                                     " interface %s", self.interface)
 
1987
                    elif error.errno == errno.ENOPROTOOPT:
 
1988
                        logger.error("SO_BINDTODEVICE not available;"
 
1989
                                     " cannot bind to interface %s",
 
1990
                                     self.interface)
 
1991
                    elif error.errno == errno.ENODEV:
 
1992
                        logger.error("Interface %s does not exist,"
 
1993
                                     " cannot bind", self.interface)
 
1994
                    else:
 
1995
                        raise
551
1996
        # Only bind(2) the socket if we really need to.
552
1997
        if self.server_address[0] or self.server_address[1]:
553
1998
            if not self.server_address[0]:
554
 
                in6addr_any = "::"
555
 
                self.server_address = (in6addr_any,
 
1999
                if self.address_family == socket.AF_INET6:
 
2000
                    any_address = "::" # in6addr_any
 
2001
                else:
 
2002
                    any_address = "0.0.0.0" # INADDR_ANY
 
2003
                self.server_address = (any_address,
556
2004
                                       self.server_address[1])
557
2005
            elif not self.server_address[1]:
558
2006
                self.server_address = (self.server_address[0],
559
2007
                                       0)
560
 
#                 if self.settings["interface"]:
 
2008
#                 if self.interface:
561
2009
#                     self.server_address = (self.server_address[0],
562
2010
#                                            0, # port
563
2011
#                                            0, # flowinfo
564
2012
#                                            if_nametoindex
565
 
#                                            (self.settings
566
 
#                                             ["interface"]))
567
 
            return super(type(self), self).server_bind()
 
2013
#                                            (self.interface))
 
2014
            return socketserver.TCPServer.server_bind(self)
 
2015
 
 
2016
 
 
2017
class MandosServer(IPv6_TCPServer):
 
2018
    """Mandos server.
 
2019
    
 
2020
    Attributes:
 
2021
        clients:        set of Client objects
 
2022
        gnutls_priority GnuTLS priority string
 
2023
        use_dbus:       Boolean; to emit D-Bus signals or not
 
2024
    
 
2025
    Assumes a gobject.MainLoop event loop.
 
2026
    """
 
2027
    def __init__(self, server_address, RequestHandlerClass,
 
2028
                 interface=None, use_ipv6=True, clients=None,
 
2029
                 gnutls_priority=None, use_dbus=True, socketfd=None):
 
2030
        self.enabled = False
 
2031
        self.clients = clients
 
2032
        if self.clients is None:
 
2033
            self.clients = {}
 
2034
        self.use_dbus = use_dbus
 
2035
        self.gnutls_priority = gnutls_priority
 
2036
        IPv6_TCPServer.__init__(self, server_address,
 
2037
                                RequestHandlerClass,
 
2038
                                interface = interface,
 
2039
                                use_ipv6 = use_ipv6,
 
2040
                                socketfd = socketfd)
568
2041
    def server_activate(self):
569
2042
        if self.enabled:
570
 
            return super(type(self), self).server_activate()
 
2043
            return socketserver.TCPServer.server_activate(self)
 
2044
    
571
2045
    def enable(self):
572
2046
        self.enabled = True
 
2047
    
 
2048
    def add_pipe(self, parent_pipe, proc):
 
2049
        # Call "handle_ipc" for both data and EOF events
 
2050
        gobject.io_add_watch(parent_pipe.fileno(),
 
2051
                             gobject.IO_IN | gobject.IO_HUP,
 
2052
                             functools.partial(self.handle_ipc,
 
2053
                                               parent_pipe =
 
2054
                                               parent_pipe,
 
2055
                                               proc = proc))
 
2056
    
 
2057
    def handle_ipc(self, source, condition, parent_pipe=None,
 
2058
                   proc = None, client_object=None):
 
2059
        # error, or the other end of multiprocessing.Pipe has closed
 
2060
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
 
2061
            # Wait for other process to exit
 
2062
            proc.join()
 
2063
            return False
 
2064
        
 
2065
        # Read a request from the child
 
2066
        request = parent_pipe.recv()
 
2067
        command = request[0]
 
2068
        
 
2069
        if command == 'init':
 
2070
            fpr = request[1]
 
2071
            address = request[2]
 
2072
            
 
2073
            for c in self.clients.itervalues():
 
2074
                if c.fingerprint == fpr:
 
2075
                    client = c
 
2076
                    break
 
2077
            else:
 
2078
                logger.info("Client not found for fingerprint: %s, ad"
 
2079
                            "dress: %s", fpr, address)
 
2080
                if self.use_dbus:
 
2081
                    # Emit D-Bus signal
 
2082
                    mandos_dbus_service.ClientNotFound(fpr,
 
2083
                                                       address[0])
 
2084
                parent_pipe.send(False)
 
2085
                return False
 
2086
            
 
2087
            gobject.io_add_watch(parent_pipe.fileno(),
 
2088
                                 gobject.IO_IN | gobject.IO_HUP,
 
2089
                                 functools.partial(self.handle_ipc,
 
2090
                                                   parent_pipe =
 
2091
                                                   parent_pipe,
 
2092
                                                   proc = proc,
 
2093
                                                   client_object =
 
2094
                                                   client))
 
2095
            parent_pipe.send(True)
 
2096
            # remove the old hook in favor of the new above hook on
 
2097
            # same fileno
 
2098
            return False
 
2099
        if command == 'funcall':
 
2100
            funcname = request[1]
 
2101
            args = request[2]
 
2102
            kwargs = request[3]
 
2103
            
 
2104
            parent_pipe.send(('data', getattr(client_object,
 
2105
                                              funcname)(*args,
 
2106
                                                         **kwargs)))
 
2107
        
 
2108
        if command == 'getattr':
 
2109
            attrname = request[1]
 
2110
            if callable(client_object.__getattribute__(attrname)):
 
2111
                parent_pipe.send(('function',))
 
2112
            else:
 
2113
                parent_pipe.send(('data', client_object
 
2114
                                  .__getattribute__(attrname)))
 
2115
        
 
2116
        if command == 'setattr':
 
2117
            attrname = request[1]
 
2118
            value = request[2]
 
2119
            setattr(client_object, attrname, value)
 
2120
        
 
2121
        return True
 
2122
 
 
2123
 
 
2124
def rfc3339_duration_to_delta(duration):
 
2125
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
 
2126
    
 
2127
    >>> rfc3339_duration_to_delta("P7D")
 
2128
    datetime.timedelta(7)
 
2129
    >>> rfc3339_duration_to_delta("PT60S")
 
2130
    datetime.timedelta(0, 60)
 
2131
    >>> rfc3339_duration_to_delta("PT60M")
 
2132
    datetime.timedelta(0, 3600)
 
2133
    >>> rfc3339_duration_to_delta("PT24H")
 
2134
    datetime.timedelta(1)
 
2135
    >>> rfc3339_duration_to_delta("P1W")
 
2136
    datetime.timedelta(7)
 
2137
    >>> rfc3339_duration_to_delta("PT5M30S")
 
2138
    datetime.timedelta(0, 330)
 
2139
    >>> rfc3339_duration_to_delta("P1DT3M20S")
 
2140
    datetime.timedelta(1, 200)
 
2141
    """
 
2142
    
 
2143
    # Parsing an RFC 3339 duration with regular expressions is not
 
2144
    # possible - there would have to be multiple places for the same
 
2145
    # values, like seconds.  The current code, while more esoteric, is
 
2146
    # cleaner without depending on a parsing library.  If Python had a
 
2147
    # built-in library for parsing we would use it, but we'd like to
 
2148
    # avoid excessive use of external libraries.
 
2149
    
 
2150
    # New type for defining tokens, syntax, and semantics all-in-one
 
2151
    Token = collections.namedtuple("Token",
 
2152
                                   ("regexp", # To match token; if
 
2153
                                              # "value" is not None,
 
2154
                                              # must have a "group"
 
2155
                                              # containing digits
 
2156
                                    "value",  # datetime.timedelta or
 
2157
                                              # None
 
2158
                                    "followers")) # Tokens valid after
 
2159
                                                  # this token
 
2160
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
 
2161
    # the "duration" ABNF definition in RFC 3339, Appendix A.
 
2162
    token_end = Token(re.compile(r"$"), None, frozenset())
 
2163
    token_second = Token(re.compile(r"(\d+)S"),
 
2164
                         datetime.timedelta(seconds=1),
 
2165
                         frozenset((token_end,)))
 
2166
    token_minute = Token(re.compile(r"(\d+)M"),
 
2167
                         datetime.timedelta(minutes=1),
 
2168
                         frozenset((token_second, token_end)))
 
2169
    token_hour = Token(re.compile(r"(\d+)H"),
 
2170
                       datetime.timedelta(hours=1),
 
2171
                       frozenset((token_minute, token_end)))
 
2172
    token_time = Token(re.compile(r"T"),
 
2173
                       None,
 
2174
                       frozenset((token_hour, token_minute,
 
2175
                                  token_second)))
 
2176
    token_day = Token(re.compile(r"(\d+)D"),
 
2177
                      datetime.timedelta(days=1),
 
2178
                      frozenset((token_time, token_end)))
 
2179
    token_month = Token(re.compile(r"(\d+)M"),
 
2180
                        datetime.timedelta(weeks=4),
 
2181
                        frozenset((token_day, token_end)))
 
2182
    token_year = Token(re.compile(r"(\d+)Y"),
 
2183
                       datetime.timedelta(weeks=52),
 
2184
                       frozenset((token_month, token_end)))
 
2185
    token_week = Token(re.compile(r"(\d+)W"),
 
2186
                       datetime.timedelta(weeks=1),
 
2187
                       frozenset((token_end,)))
 
2188
    token_duration = Token(re.compile(r"P"), None,
 
2189
                           frozenset((token_year, token_month,
 
2190
                                      token_day, token_time,
 
2191
                                      token_week))),
 
2192
    # Define starting values
 
2193
    value = datetime.timedelta() # Value so far
 
2194
    found_token = None
 
2195
    followers = frozenset(token_duration,) # Following valid tokens
 
2196
    s = duration                # String left to parse
 
2197
    # Loop until end token is found
 
2198
    while found_token is not token_end:
 
2199
        # Search for any currently valid tokens
 
2200
        for token in followers:
 
2201
            match = token.regexp.match(s)
 
2202
            if match is not None:
 
2203
                # Token found
 
2204
                if token.value is not None:
 
2205
                    # Value found, parse digits
 
2206
                    factor = int(match.group(1), 10)
 
2207
                    # Add to value so far
 
2208
                    value += factor * token.value
 
2209
                # Strip token from string
 
2210
                s = token.regexp.sub("", s, 1)
 
2211
                # Go to found token
 
2212
                found_token = token
 
2213
                # Set valid next tokens
 
2214
                followers = found_token.followers
 
2215
                break
 
2216
        else:
 
2217
            # No currently valid tokens were found
 
2218
            raise ValueError("Invalid RFC 3339 duration")
 
2219
    # End token found
 
2220
    return value
573
2221
 
574
2222
 
575
2223
def string_to_delta(interval):
576
2224
    """Parse a string and return a datetime.timedelta
577
 
 
 
2225
    
578
2226
    >>> string_to_delta('7d')
579
2227
    datetime.timedelta(7)
580
2228
    >>> string_to_delta('60s')
583
2231
    datetime.timedelta(0, 3600)
584
2232
    >>> string_to_delta('24h')
585
2233
    datetime.timedelta(1)
586
 
    >>> string_to_delta(u'1w')
 
2234
    >>> string_to_delta('1w')
587
2235
    datetime.timedelta(7)
588
2236
    >>> string_to_delta('5m 30s')
589
2237
    datetime.timedelta(0, 330)
590
2238
    """
 
2239
    
 
2240
    try:
 
2241
        return rfc3339_duration_to_delta(interval)
 
2242
    except ValueError:
 
2243
        pass
 
2244
    
591
2245
    timevalue = datetime.timedelta(0)
592
2246
    for s in interval.split():
593
2247
        try:
594
 
            suffix=unicode(s[-1])
595
 
            value=int(s[:-1])
596
 
            if suffix == u"d":
 
2248
            suffix = unicode(s[-1])
 
2249
            value = int(s[:-1])
 
2250
            if suffix == "d":
597
2251
                delta = datetime.timedelta(value)
598
 
            elif suffix == u"s":
 
2252
            elif suffix == "s":
599
2253
                delta = datetime.timedelta(0, value)
600
 
            elif suffix == u"m":
 
2254
            elif suffix == "m":
601
2255
                delta = datetime.timedelta(0, 0, 0, 0, value)
602
 
            elif suffix == u"h":
 
2256
            elif suffix == "h":
603
2257
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
604
 
            elif suffix == u"w":
 
2258
            elif suffix == "w":
605
2259
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
606
2260
            else:
607
 
                raise ValueError
608
 
        except (ValueError, IndexError):
609
 
            raise ValueError
 
2261
                raise ValueError("Unknown suffix {0!r}"
 
2262
                                 .format(suffix))
 
2263
        except IndexError as e:
 
2264
            raise ValueError(*(e.args))
610
2265
        timevalue += delta
611
2266
    return timevalue
612
2267
 
613
2268
 
614
 
def server_state_changed(state):
615
 
    """Derived from the Avahi example code"""
616
 
    if state == avahi.SERVER_COLLISION:
617
 
        logger.error(u"Zeroconf server name collision")
618
 
        service.remove()
619
 
    elif state == avahi.SERVER_RUNNING:
620
 
        service.add()
621
 
 
622
 
 
623
 
def entry_group_state_changed(state, error):
624
 
    """Derived from the Avahi example code"""
625
 
    logger.debug(u"Avahi state change: %i", state)
626
 
    
627
 
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
628
 
        logger.debug(u"Zeroconf service established.")
629
 
    elif state == avahi.ENTRY_GROUP_COLLISION:
630
 
        logger.warning(u"Zeroconf service name collision.")
631
 
        service.rename()
632
 
    elif state == avahi.ENTRY_GROUP_FAILURE:
633
 
        logger.critical(u"Avahi: Error in group state changed %s",
634
 
                        unicode(error))
635
 
        raise AvahiGroupError("State changed: %s", str(error))
636
 
 
637
 
def if_nametoindex(interface):
638
 
    """Call the C function if_nametoindex(), or equivalent"""
639
 
    global if_nametoindex
640
 
    try:
641
 
        if "ctypes.util" not in sys.modules:
642
 
            import ctypes.util
643
 
        if_nametoindex = ctypes.cdll.LoadLibrary\
644
 
            (ctypes.util.find_library("c")).if_nametoindex
645
 
    except (OSError, AttributeError):
646
 
        if "struct" not in sys.modules:
647
 
            import struct
648
 
        if "fcntl" not in sys.modules:
649
 
            import fcntl
650
 
        def if_nametoindex(interface):
651
 
            "Get an interface index the hard way, i.e. using fcntl()"
652
 
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
653
 
            s = socket.socket()
654
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
655
 
                                struct.pack("16s16x", interface))
656
 
            s.close()
657
 
            interface_index = struct.unpack("I", ifreq[16:20])[0]
658
 
            return interface_index
659
 
    return if_nametoindex(interface)
660
 
 
661
 
 
662
2269
def daemon(nochdir = False, noclose = False):
663
2270
    """See daemon(3).  Standard BSD Unix function.
 
2271
    
664
2272
    This should really exist as os.daemon, but it doesn't (yet)."""
665
2273
    if os.fork():
666
2274
        sys.exit()
671
2279
        sys.exit()
672
2280
    if not noclose:
673
2281
        # Close all standard open file descriptors
674
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
2282
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
675
2283
        if not stat.S_ISCHR(os.fstat(null).st_mode):
676
2284
            raise OSError(errno.ENODEV,
677
 
                          "/dev/null not a character device")
 
2285
                          "{0} not a character device"
 
2286
                          .format(os.devnull))
678
2287
        os.dup2(null, sys.stdin.fileno())
679
2288
        os.dup2(null, sys.stdout.fileno())
680
2289
        os.dup2(null, sys.stderr.fileno())
683
2292
 
684
2293
 
685
2294
def main():
686
 
    global main_loop_started
687
 
    main_loop_started = False
688
 
    
689
 
    parser = OptionParser(version = "%%prog %s" % version)
690
 
    parser.add_option("-i", "--interface", type="string",
691
 
                      metavar="IF", help="Bind to interface IF")
692
 
    parser.add_option("-a", "--address", type="string",
693
 
                      help="Address to listen for requests on")
694
 
    parser.add_option("-p", "--port", type="int",
695
 
                      help="Port number to receive requests on")
696
 
    parser.add_option("--check", action="store_true", default=False,
697
 
                      help="Run self-test")
698
 
    parser.add_option("--debug", action="store_true",
699
 
                      help="Debug mode; run in foreground and log to"
700
 
                      " terminal")
701
 
    parser.add_option("--priority", type="string", help="GnuTLS"
702
 
                      " priority string (see GnuTLS documentation)")
703
 
    parser.add_option("--servicename", type="string", metavar="NAME",
704
 
                      help="Zeroconf service name")
705
 
    parser.add_option("--configdir", type="string",
706
 
                      default="/etc/mandos", metavar="DIR",
707
 
                      help="Directory to search for configuration"
708
 
                      " files")
709
 
    (options, args) = parser.parse_args()
 
2295
    
 
2296
    ##################################################################
 
2297
    # Parsing of options, both command line and config file
 
2298
    
 
2299
    parser = argparse.ArgumentParser()
 
2300
    parser.add_argument("-v", "--version", action="version",
 
2301
                        version = "%(prog)s {0}".format(version),
 
2302
                        help="show version number and exit")
 
2303
    parser.add_argument("-i", "--interface", metavar="IF",
 
2304
                        help="Bind to interface IF")
 
2305
    parser.add_argument("-a", "--address",
 
2306
                        help="Address to listen for requests on")
 
2307
    parser.add_argument("-p", "--port", type=int,
 
2308
                        help="Port number to receive requests on")
 
2309
    parser.add_argument("--check", action="store_true",
 
2310
                        help="Run self-test")
 
2311
    parser.add_argument("--debug", action="store_true",
 
2312
                        help="Debug mode; run in foreground and log"
 
2313
                        " to terminal", default=None)
 
2314
    parser.add_argument("--debuglevel", metavar="LEVEL",
 
2315
                        help="Debug level for stdout output")
 
2316
    parser.add_argument("--priority", help="GnuTLS"
 
2317
                        " priority string (see GnuTLS documentation)")
 
2318
    parser.add_argument("--servicename",
 
2319
                        metavar="NAME", help="Zeroconf service name")
 
2320
    parser.add_argument("--configdir",
 
2321
                        default="/etc/mandos", metavar="DIR",
 
2322
                        help="Directory to search for configuration"
 
2323
                        " files")
 
2324
    parser.add_argument("--no-dbus", action="store_false",
 
2325
                        dest="use_dbus", help="Do not provide D-Bus"
 
2326
                        " system bus interface", default=None)
 
2327
    parser.add_argument("--no-ipv6", action="store_false",
 
2328
                        dest="use_ipv6", help="Do not use IPv6",
 
2329
                        default=None)
 
2330
    parser.add_argument("--no-restore", action="store_false",
 
2331
                        dest="restore", help="Do not restore stored"
 
2332
                        " state", default=None)
 
2333
    parser.add_argument("--socket", type=int,
 
2334
                        help="Specify a file descriptor to a network"
 
2335
                        " socket to use instead of creating one")
 
2336
    parser.add_argument("--statedir", metavar="DIR",
 
2337
                        help="Directory to save/restore state in")
 
2338
    parser.add_argument("--foreground", action="store_true",
 
2339
                        help="Run in foreground", default=None)
 
2340
    parser.add_argument("--no-zeroconf", action="store_false",
 
2341
                        dest="zeroconf", help="Do not use Zeroconf",
 
2342
                        default=None)
 
2343
    
 
2344
    options = parser.parse_args()
710
2345
    
711
2346
    if options.check:
712
2347
        import doctest
713
 
        doctest.testmod()
714
 
        sys.exit()
 
2348
        fail_count, test_count = doctest.testmod()
 
2349
        sys.exit(os.EX_OK if fail_count == 0 else 1)
715
2350
    
716
2351
    # Default values for config file for server-global settings
717
2352
    server_defaults = { "interface": "",
719
2354
                        "port": "",
720
2355
                        "debug": "False",
721
2356
                        "priority":
722
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
 
2357
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
723
2358
                        "servicename": "Mandos",
 
2359
                        "use_dbus": "True",
 
2360
                        "use_ipv6": "True",
 
2361
                        "debuglevel": "",
 
2362
                        "restore": "True",
 
2363
                        "socket": "",
 
2364
                        "statedir": "/var/lib/mandos",
 
2365
                        "foreground": "False",
 
2366
                        "zeroconf": "True",
724
2367
                        }
725
2368
    
726
2369
    # Parse config file for server-global settings
727
 
    server_config = ConfigParser.SafeConfigParser(server_defaults)
 
2370
    server_config = configparser.SafeConfigParser(server_defaults)
728
2371
    del server_defaults
729
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
 
2372
    server_config.read(os.path.join(options.configdir,
 
2373
                                    "mandos.conf"))
730
2374
    # Convert the SafeConfigParser object to a dict
731
2375
    server_settings = server_config.defaults()
732
 
    # Use getboolean on the boolean config option
733
 
    server_settings["debug"] = server_config.getboolean\
734
 
                               ("DEFAULT", "debug")
 
2376
    # Use the appropriate methods on the non-string config options
 
2377
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
 
2378
        server_settings[option] = server_config.getboolean("DEFAULT",
 
2379
                                                           option)
 
2380
    if server_settings["port"]:
 
2381
        server_settings["port"] = server_config.getint("DEFAULT",
 
2382
                                                       "port")
 
2383
    if server_settings["socket"]:
 
2384
        server_settings["socket"] = server_config.getint("DEFAULT",
 
2385
                                                         "socket")
 
2386
        # Later, stdin will, and stdout and stderr might, be dup'ed
 
2387
        # over with an opened os.devnull.  But we don't want this to
 
2388
        # happen with a supplied network socket.
 
2389
        if 0 <= server_settings["socket"] <= 2:
 
2390
            server_settings["socket"] = os.dup(server_settings
 
2391
                                               ["socket"])
735
2392
    del server_config
736
2393
    
737
2394
    # Override the settings from the config file with command line
738
2395
    # options, if set.
739
2396
    for option in ("interface", "address", "port", "debug",
740
 
                   "priority", "servicename", "configdir"):
 
2397
                   "priority", "servicename", "configdir",
 
2398
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
 
2399
                   "statedir", "socket", "foreground", "zeroconf"):
741
2400
        value = getattr(options, option)
742
2401
        if value is not None:
743
2402
            server_settings[option] = value
744
2403
    del options
 
2404
    # Force all strings to be unicode
 
2405
    for option in server_settings.keys():
 
2406
        if type(server_settings[option]) is str:
 
2407
            server_settings[option] = unicode(server_settings[option])
 
2408
    # Force all boolean options to be boolean
 
2409
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
2410
                   "foreground", "zeroconf"):
 
2411
        server_settings[option] = bool(server_settings[option])
 
2412
    # Debug implies foreground
 
2413
    if server_settings["debug"]:
 
2414
        server_settings["foreground"] = True
745
2415
    # Now we have our good server settings in "server_settings"
746
2416
    
 
2417
    ##################################################################
 
2418
    
 
2419
    if (not server_settings["zeroconf"] and
 
2420
        not (server_settings["port"]
 
2421
             or server_settings["socket"] != "")):
 
2422
            parser.error("Needs port or socket to work without"
 
2423
                         " Zeroconf")
 
2424
    
 
2425
    # For convenience
747
2426
    debug = server_settings["debug"]
 
2427
    debuglevel = server_settings["debuglevel"]
 
2428
    use_dbus = server_settings["use_dbus"]
 
2429
    use_ipv6 = server_settings["use_ipv6"]
 
2430
    stored_state_path = os.path.join(server_settings["statedir"],
 
2431
                                     stored_state_file)
 
2432
    foreground = server_settings["foreground"]
 
2433
    zeroconf = server_settings["zeroconf"]
748
2434
    
749
 
    if not debug:
750
 
        syslogger.setLevel(logging.WARNING)
751
 
        console.setLevel(logging.WARNING)
 
2435
    if debug:
 
2436
        initlogger(debug, logging.DEBUG)
 
2437
    else:
 
2438
        if not debuglevel:
 
2439
            initlogger(debug)
 
2440
        else:
 
2441
            level = getattr(logging, debuglevel.upper())
 
2442
            initlogger(debug, level)
752
2443
    
753
2444
    if server_settings["servicename"] != "Mandos":
754
 
        syslogger.setFormatter(logging.Formatter\
755
 
                               ('Mandos (%s): %%(levelname)s:'
756
 
                                ' %%(message)s'
757
 
                                % server_settings["servicename"]))
 
2445
        syslogger.setFormatter(logging.Formatter
 
2446
                               ('Mandos ({0}) [%(process)d]:'
 
2447
                                ' %(levelname)s: %(message)s'
 
2448
                                .format(server_settings
 
2449
                                        ["servicename"])))
758
2450
    
759
2451
    # Parse config file with clients
760
 
    client_defaults = { "timeout": "1h",
761
 
                        "interval": "5m",
762
 
                        "checker": "fping -q -- %(host)s",
763
 
                        "host": "",
764
 
                        }
765
 
    client_config = ConfigParser.SafeConfigParser(client_defaults)
 
2452
    client_config = configparser.SafeConfigParser(Client
 
2453
                                                  .client_defaults)
766
2454
    client_config.read(os.path.join(server_settings["configdir"],
767
2455
                                    "clients.conf"))
768
2456
    
769
 
    clients = Set()
770
 
    tcp_server = IPv6_TCPServer((server_settings["address"],
771
 
                                 server_settings["port"]),
772
 
                                tcp_handler,
773
 
                                settings=server_settings,
774
 
                                clients=clients)
775
 
    pidfilename = "/var/run/mandos.pid"
776
 
    try:
777
 
        pidfile = open(pidfilename, "w")
778
 
    except IOError, error:
779
 
        logger.error("Could not open file %r", pidfilename)
780
 
    
781
 
    uid = 65534
782
 
    gid = 65534
783
 
    try:
784
 
        uid = pwd.getpwnam("mandos").pw_uid
785
 
    except KeyError:
786
 
        try:
787
 
            uid = pwd.getpwnam("nobody").pw_uid
788
 
        except KeyError:
789
 
            pass
790
 
    try:
791
 
        gid = pwd.getpwnam("mandos").pw_gid
792
 
    except KeyError:
793
 
        try:
794
 
            gid = pwd.getpwnam("nogroup").pw_gid
795
 
        except KeyError:
796
 
            pass
797
 
    try:
 
2457
    global mandos_dbus_service
 
2458
    mandos_dbus_service = None
 
2459
    
 
2460
    socketfd = None
 
2461
    if server_settings["socket"] != "":
 
2462
        socketfd = server_settings["socket"]
 
2463
    tcp_server = MandosServer((server_settings["address"],
 
2464
                               server_settings["port"]),
 
2465
                              ClientHandler,
 
2466
                              interface=(server_settings["interface"]
 
2467
                                         or None),
 
2468
                              use_ipv6=use_ipv6,
 
2469
                              gnutls_priority=
 
2470
                              server_settings["priority"],
 
2471
                              use_dbus=use_dbus,
 
2472
                              socketfd=socketfd)
 
2473
    if not foreground:
 
2474
        pidfilename = "/run/mandos.pid"
 
2475
        if not os.path.isdir("/run/."):
 
2476
            pidfilename = "/var/run/mandos.pid"
 
2477
        pidfile = None
 
2478
        try:
 
2479
            pidfile = open(pidfilename, "w")
 
2480
        except IOError as e:
 
2481
            logger.error("Could not open file %r", pidfilename,
 
2482
                         exc_info=e)
 
2483
    
 
2484
    for name in ("_mandos", "mandos", "nobody"):
 
2485
        try:
 
2486
            uid = pwd.getpwnam(name).pw_uid
 
2487
            gid = pwd.getpwnam(name).pw_gid
 
2488
            break
 
2489
        except KeyError:
 
2490
            continue
 
2491
    else:
 
2492
        uid = 65534
 
2493
        gid = 65534
 
2494
    try:
 
2495
        os.setgid(gid)
798
2496
        os.setuid(uid)
799
 
        os.setgid(gid)
800
 
    except OSError, error:
801
 
        if error[0] != errno.EPERM:
802
 
            raise error
803
 
    
804
 
    global service
805
 
    service = AvahiService(name = server_settings["servicename"],
806
 
                           type = "_mandos._tcp", );
807
 
    if server_settings["interface"]:
808
 
        service.interface = if_nametoindex\
809
 
                            (server_settings["interface"])
 
2497
    except OSError as error:
 
2498
        if error.errno != errno.EPERM:
 
2499
            raise
 
2500
    
 
2501
    if debug:
 
2502
        # Enable all possible GnuTLS debugging
 
2503
        
 
2504
        # "Use a log level over 10 to enable all debugging options."
 
2505
        # - GnuTLS manual
 
2506
        gnutls.library.functions.gnutls_global_set_log_level(11)
 
2507
        
 
2508
        @gnutls.library.types.gnutls_log_func
 
2509
        def debug_gnutls(level, string):
 
2510
            logger.debug("GnuTLS: %s", string[:-1])
 
2511
        
 
2512
        (gnutls.library.functions
 
2513
         .gnutls_global_set_log_function(debug_gnutls))
 
2514
        
 
2515
        # Redirect stdin so all checkers get /dev/null
 
2516
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
2517
        os.dup2(null, sys.stdin.fileno())
 
2518
        if null > 2:
 
2519
            os.close(null)
 
2520
    
 
2521
    # Need to fork before connecting to D-Bus
 
2522
    if not foreground:
 
2523
        # Close all input and output, do double fork, etc.
 
2524
        daemon()
 
2525
    
 
2526
    # multiprocessing will use threads, so before we use gobject we
 
2527
    # need to inform gobject that threads will be used.
 
2528
    gobject.threads_init()
810
2529
    
811
2530
    global main_loop
812
 
    global bus
813
 
    global server
814
2531
    # From the Avahi example code
815
 
    DBusGMainLoop(set_as_default=True )
 
2532
    DBusGMainLoop(set_as_default=True)
816
2533
    main_loop = gobject.MainLoop()
817
2534
    bus = dbus.SystemBus()
818
 
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
819
 
                                           avahi.DBUS_PATH_SERVER),
820
 
                            avahi.DBUS_INTERFACE_SERVER)
821
2535
    # End of Avahi example code
822
 
    
823
 
    def remove_from_clients(client):
824
 
        clients.remove(client)
825
 
        if not clients:
826
 
            logger.critical(u"No clients left, exiting")
827
 
            sys.exit()
828
 
    
829
 
    clients.update(Set(Client(name = section,
830
 
                              stop_hook = remove_from_clients,
831
 
                              config
832
 
                              = dict(client_config.items(section)))
833
 
                       for section in client_config.sections()))
834
 
    if not clients:
835
 
        logger.critical(u"No clients defined")
836
 
        sys.exit(1)
837
 
    
838
 
    if debug:
839
 
        # Redirect stdin so all checkers get /dev/null
840
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
841
 
        os.dup2(null, sys.stdin.fileno())
842
 
        if null > 2:
843
 
            os.close(null)
844
 
    else:
845
 
        # No console logging
846
 
        logger.removeHandler(console)
847
 
        # Close all input and output, do double fork, etc.
848
 
        daemon()
849
 
    
850
 
    try:
851
 
        pid = os.getpid()
852
 
        pidfile.write(str(pid) + "\n")
853
 
        pidfile.close()
 
2536
    if use_dbus:
 
2537
        try:
 
2538
            bus_name = dbus.service.BusName("se.recompile.Mandos",
 
2539
                                            bus, do_not_queue=True)
 
2540
            old_bus_name = (dbus.service.BusName
 
2541
                            ("se.bsnet.fukt.Mandos", bus,
 
2542
                             do_not_queue=True))
 
2543
        except dbus.exceptions.NameExistsException as e:
 
2544
            logger.error("Disabling D-Bus:", exc_info=e)
 
2545
            use_dbus = False
 
2546
            server_settings["use_dbus"] = False
 
2547
            tcp_server.use_dbus = False
 
2548
    if zeroconf:
 
2549
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
2550
        service = AvahiServiceToSyslog(name =
 
2551
                                       server_settings["servicename"],
 
2552
                                       servicetype = "_mandos._tcp",
 
2553
                                       protocol = protocol, bus = bus)
 
2554
        if server_settings["interface"]:
 
2555
            service.interface = (if_nametoindex
 
2556
                                 (str(server_settings["interface"])))
 
2557
    
 
2558
    global multiprocessing_manager
 
2559
    multiprocessing_manager = multiprocessing.Manager()
 
2560
    
 
2561
    client_class = Client
 
2562
    if use_dbus:
 
2563
        client_class = functools.partial(ClientDBus, bus = bus)
 
2564
    
 
2565
    client_settings = Client.config_parser(client_config)
 
2566
    old_client_settings = {}
 
2567
    clients_data = {}
 
2568
    
 
2569
    # This is used to redirect stdout and stderr for checker processes
 
2570
    global wnull
 
2571
    wnull = open(os.devnull, "w") # A writable /dev/null
 
2572
    # Only used if server is running in foreground but not in debug
 
2573
    # mode
 
2574
    if debug or not foreground:
 
2575
        wnull.close()
 
2576
    
 
2577
    # Get client data and settings from last running state.
 
2578
    if server_settings["restore"]:
 
2579
        try:
 
2580
            with open(stored_state_path, "rb") as stored_state:
 
2581
                clients_data, old_client_settings = (pickle.load
 
2582
                                                     (stored_state))
 
2583
            os.remove(stored_state_path)
 
2584
        except IOError as e:
 
2585
            if e.errno == errno.ENOENT:
 
2586
                logger.warning("Could not load persistent state: {0}"
 
2587
                                .format(os.strerror(e.errno)))
 
2588
            else:
 
2589
                logger.critical("Could not load persistent state:",
 
2590
                                exc_info=e)
 
2591
                raise
 
2592
        except EOFError as e:
 
2593
            logger.warning("Could not load persistent state: "
 
2594
                           "EOFError:", exc_info=e)
 
2595
    
 
2596
    with PGPEngine() as pgp:
 
2597
        for client_name, client in clients_data.iteritems():
 
2598
            # Skip removed clients
 
2599
            if client_name not in client_settings:
 
2600
                continue
 
2601
            
 
2602
            # Decide which value to use after restoring saved state.
 
2603
            # We have three different values: Old config file,
 
2604
            # new config file, and saved state.
 
2605
            # New config value takes precedence if it differs from old
 
2606
            # config value, otherwise use saved state.
 
2607
            for name, value in client_settings[client_name].items():
 
2608
                try:
 
2609
                    # For each value in new config, check if it
 
2610
                    # differs from the old config value (Except for
 
2611
                    # the "secret" attribute)
 
2612
                    if (name != "secret" and
 
2613
                        value != old_client_settings[client_name]
 
2614
                        [name]):
 
2615
                        client[name] = value
 
2616
                except KeyError:
 
2617
                    pass
 
2618
            
 
2619
            # Clients who has passed its expire date can still be
 
2620
            # enabled if its last checker was successful.  Clients
 
2621
            # whose checker succeeded before we stored its state is
 
2622
            # assumed to have successfully run all checkers during
 
2623
            # downtime.
 
2624
            if client["enabled"]:
 
2625
                if datetime.datetime.utcnow() >= client["expires"]:
 
2626
                    if not client["last_checked_ok"]:
 
2627
                        logger.warning(
 
2628
                            "disabling client {0} - Client never "
 
2629
                            "performed a successful checker"
 
2630
                            .format(client_name))
 
2631
                        client["enabled"] = False
 
2632
                    elif client["last_checker_status"] != 0:
 
2633
                        logger.warning(
 
2634
                            "disabling client {0} - Client "
 
2635
                            "last checker failed with error code {1}"
 
2636
                            .format(client_name,
 
2637
                                    client["last_checker_status"]))
 
2638
                        client["enabled"] = False
 
2639
                    else:
 
2640
                        client["expires"] = (datetime.datetime
 
2641
                                             .utcnow()
 
2642
                                             + client["timeout"])
 
2643
                        logger.debug("Last checker succeeded,"
 
2644
                                     " keeping {0} enabled"
 
2645
                                     .format(client_name))
 
2646
            try:
 
2647
                client["secret"] = (
 
2648
                    pgp.decrypt(client["encrypted_secret"],
 
2649
                                client_settings[client_name]
 
2650
                                ["secret"]))
 
2651
            except PGPError:
 
2652
                # If decryption fails, we use secret from new settings
 
2653
                logger.debug("Failed to decrypt {0} old secret"
 
2654
                             .format(client_name))
 
2655
                client["secret"] = (
 
2656
                    client_settings[client_name]["secret"])
 
2657
    
 
2658
    # Add/remove clients based on new changes made to config
 
2659
    for client_name in (set(old_client_settings)
 
2660
                        - set(client_settings)):
 
2661
        del clients_data[client_name]
 
2662
    for client_name in (set(client_settings)
 
2663
                        - set(old_client_settings)):
 
2664
        clients_data[client_name] = client_settings[client_name]
 
2665
    
 
2666
    # Create all client objects
 
2667
    for client_name, client in clients_data.iteritems():
 
2668
        tcp_server.clients[client_name] = client_class(
 
2669
            name = client_name, settings = client,
 
2670
            server_settings = server_settings)
 
2671
    
 
2672
    if not tcp_server.clients:
 
2673
        logger.warning("No clients defined")
 
2674
    
 
2675
    if not foreground:
 
2676
        if pidfile is not None:
 
2677
            try:
 
2678
                with pidfile:
 
2679
                    pid = os.getpid()
 
2680
                    pidfile.write(str(pid) + "\n".encode("utf-8"))
 
2681
            except IOError:
 
2682
                logger.error("Could not write to file %r with PID %d",
 
2683
                             pidfilename, pid)
854
2684
        del pidfile
855
 
    except IOError, err:
856
 
        logger.error(u"Could not write to file %r with PID %d",
857
 
                     pidfilename, pid)
858
 
    except NameError:
859
 
        # "pidfile" was never created
860
 
        pass
861
 
    del pidfilename
 
2685
        del pidfilename
 
2686
    
 
2687
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
 
2688
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
 
2689
    
 
2690
    if use_dbus:
 
2691
        @alternate_dbus_interfaces({"se.recompile.Mandos":
 
2692
                                        "se.bsnet.fukt.Mandos"})
 
2693
        class MandosDBusService(DBusObjectWithProperties):
 
2694
            """A D-Bus proxy object"""
 
2695
            def __init__(self):
 
2696
                dbus.service.Object.__init__(self, bus, "/")
 
2697
            _interface = "se.recompile.Mandos"
 
2698
            
 
2699
            @dbus_interface_annotations(_interface)
 
2700
            def _foo(self):
 
2701
                return { "org.freedesktop.DBus.Property"
 
2702
                         ".EmitsChangedSignal":
 
2703
                             "false"}
 
2704
            
 
2705
            @dbus.service.signal(_interface, signature="o")
 
2706
            def ClientAdded(self, objpath):
 
2707
                "D-Bus signal"
 
2708
                pass
 
2709
            
 
2710
            @dbus.service.signal(_interface, signature="ss")
 
2711
            def ClientNotFound(self, fingerprint, address):
 
2712
                "D-Bus signal"
 
2713
                pass
 
2714
            
 
2715
            @dbus.service.signal(_interface, signature="os")
 
2716
            def ClientRemoved(self, objpath, name):
 
2717
                "D-Bus signal"
 
2718
                pass
 
2719
            
 
2720
            @dbus.service.method(_interface, out_signature="ao")
 
2721
            def GetAllClients(self):
 
2722
                "D-Bus method"
 
2723
                return dbus.Array(c.dbus_object_path
 
2724
                                  for c in
 
2725
                                  tcp_server.clients.itervalues())
 
2726
            
 
2727
            @dbus.service.method(_interface,
 
2728
                                 out_signature="a{oa{sv}}")
 
2729
            def GetAllClientsWithProperties(self):
 
2730
                "D-Bus method"
 
2731
                return dbus.Dictionary(
 
2732
                    ((c.dbus_object_path, c.GetAll(""))
 
2733
                     for c in tcp_server.clients.itervalues()),
 
2734
                    signature="oa{sv}")
 
2735
            
 
2736
            @dbus.service.method(_interface, in_signature="o")
 
2737
            def RemoveClient(self, object_path):
 
2738
                "D-Bus method"
 
2739
                for c in tcp_server.clients.itervalues():
 
2740
                    if c.dbus_object_path == object_path:
 
2741
                        del tcp_server.clients[c.name]
 
2742
                        c.remove_from_connection()
 
2743
                        # Don't signal anything except ClientRemoved
 
2744
                        c.disable(quiet=True)
 
2745
                        # Emit D-Bus signal
 
2746
                        self.ClientRemoved(object_path, c.name)
 
2747
                        return
 
2748
                raise KeyError(object_path)
 
2749
            
 
2750
            del _interface
 
2751
        
 
2752
        mandos_dbus_service = MandosDBusService()
862
2753
    
863
2754
    def cleanup():
864
2755
        "Cleanup function; run on exit"
865
 
        global group
866
 
        # From the Avahi example code
867
 
        if not group is None:
868
 
            group.Free()
869
 
            group = None
870
 
        # End of Avahi example code
871
 
        
872
 
        while clients:
873
 
            client = clients.pop()
874
 
            client.stop_hook = None
875
 
            client.stop()
 
2756
        if zeroconf:
 
2757
            service.cleanup()
 
2758
        
 
2759
        multiprocessing.active_children()
 
2760
        wnull.close()
 
2761
        if not (tcp_server.clients or client_settings):
 
2762
            return
 
2763
        
 
2764
        # Store client before exiting. Secrets are encrypted with key
 
2765
        # based on what config file has. If config file is
 
2766
        # removed/edited, old secret will thus be unrecovable.
 
2767
        clients = {}
 
2768
        with PGPEngine() as pgp:
 
2769
            for client in tcp_server.clients.itervalues():
 
2770
                key = client_settings[client.name]["secret"]
 
2771
                client.encrypted_secret = pgp.encrypt(client.secret,
 
2772
                                                      key)
 
2773
                client_dict = {}
 
2774
                
 
2775
                # A list of attributes that can not be pickled
 
2776
                # + secret.
 
2777
                exclude = set(("bus", "changedstate", "secret",
 
2778
                               "checker", "server_settings"))
 
2779
                for name, typ in (inspect.getmembers
 
2780
                                  (dbus.service.Object)):
 
2781
                    exclude.add(name)
 
2782
                
 
2783
                client_dict["encrypted_secret"] = (client
 
2784
                                                   .encrypted_secret)
 
2785
                for attr in client.client_structure:
 
2786
                    if attr not in exclude:
 
2787
                        client_dict[attr] = getattr(client, attr)
 
2788
                
 
2789
                clients[client.name] = client_dict
 
2790
                del client_settings[client.name]["secret"]
 
2791
        
 
2792
        try:
 
2793
            with (tempfile.NamedTemporaryFile
 
2794
                  (mode='wb', suffix=".pickle", prefix='clients-',
 
2795
                   dir=os.path.dirname(stored_state_path),
 
2796
                   delete=False)) as stored_state:
 
2797
                pickle.dump((clients, client_settings), stored_state)
 
2798
                tempname=stored_state.name
 
2799
            os.rename(tempname, stored_state_path)
 
2800
        except (IOError, OSError) as e:
 
2801
            if not debug:
 
2802
                try:
 
2803
                    os.remove(tempname)
 
2804
                except NameError:
 
2805
                    pass
 
2806
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
 
2807
                logger.warning("Could not save persistent state: {0}"
 
2808
                               .format(os.strerror(e.errno)))
 
2809
            else:
 
2810
                logger.warning("Could not save persistent state:",
 
2811
                               exc_info=e)
 
2812
                raise
 
2813
        
 
2814
        # Delete all clients, and settings from config
 
2815
        while tcp_server.clients:
 
2816
            name, client = tcp_server.clients.popitem()
 
2817
            if use_dbus:
 
2818
                client.remove_from_connection()
 
2819
            # Don't signal anything except ClientRemoved
 
2820
            client.disable(quiet=True)
 
2821
            if use_dbus:
 
2822
                # Emit D-Bus signal
 
2823
                mandos_dbus_service.ClientRemoved(client
 
2824
                                                  .dbus_object_path,
 
2825
                                                  client.name)
 
2826
        client_settings.clear()
876
2827
    
877
2828
    atexit.register(cleanup)
878
2829
    
879
 
    if not debug:
880
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
881
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
882
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
883
 
    
884
 
    for client in clients:
885
 
        client.start()
 
2830
    for client in tcp_server.clients.itervalues():
 
2831
        if use_dbus:
 
2832
            # Emit D-Bus signal
 
2833
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
2834
        # Need to initiate checking of clients
 
2835
        if client.enabled:
 
2836
            client.init_checker()
886
2837
    
887
2838
    tcp_server.enable()
888
2839
    tcp_server.server_activate()
889
2840
    
890
2841
    # Find out what port we got
891
 
    service.port = tcp_server.socket.getsockname()[1]
892
 
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
893
 
                u" scope_id %d" % tcp_server.socket.getsockname())
 
2842
    if zeroconf:
 
2843
        service.port = tcp_server.socket.getsockname()[1]
 
2844
    if use_ipv6:
 
2845
        logger.info("Now listening on address %r, port %d,"
 
2846
                    " flowinfo %d, scope_id %d",
 
2847
                    *tcp_server.socket.getsockname())
 
2848
    else:                       # IPv4
 
2849
        logger.info("Now listening on address %r, port %d",
 
2850
                    *tcp_server.socket.getsockname())
894
2851
    
895
2852
    #service.interface = tcp_server.socket.getsockname()[3]
896
2853
    
897
2854
    try:
898
 
        # From the Avahi example code
899
 
        server.connect_to_signal("StateChanged", server_state_changed)
900
 
        try:
901
 
            server_state_changed(server.GetState())
902
 
        except dbus.exceptions.DBusException, error:
903
 
            logger.critical(u"DBusException: %s", error)
904
 
            sys.exit(1)
905
 
        # End of Avahi example code
 
2855
        if zeroconf:
 
2856
            # From the Avahi example code
 
2857
            try:
 
2858
                service.activate()
 
2859
            except dbus.exceptions.DBusException as error:
 
2860
                logger.critical("D-Bus Exception", exc_info=error)
 
2861
                cleanup()
 
2862
                sys.exit(1)
 
2863
            # End of Avahi example code
906
2864
        
907
2865
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
908
2866
                             lambda *args, **kwargs:
909
 
                             tcp_server.handle_request\
910
 
                             (*args[2:], **kwargs) or True)
 
2867
                             (tcp_server.handle_request
 
2868
                              (*args[2:], **kwargs) or True))
911
2869
        
912
 
        logger.debug(u"Starting main loop")
913
 
        main_loop_started = True
 
2870
        logger.debug("Starting main loop")
914
2871
        main_loop.run()
915
 
    except AvahiError, error:
916
 
        logger.critical(u"AvahiError: %s" + unicode(error))
 
2872
    except AvahiError as error:
 
2873
        logger.critical("Avahi Error", exc_info=error)
 
2874
        cleanup()
917
2875
        sys.exit(1)
918
2876
    except KeyboardInterrupt:
919
2877
        if debug:
920
 
            print
 
2878
            print("", file=sys.stderr)
 
2879
        logger.debug("Server received KeyboardInterrupt")
 
2880
    logger.debug("Server exiting")
 
2881
    # Must run before the D-Bus bus name gets deregistered
 
2882
    cleanup()
921
2883
 
922
2884
if __name__ == '__main__':
923
2885
    main()