/mandos/trunk

To get this branch, use:
bzr branch http://bzr.recompile.se/loggerhead/mandos/trunk

« back to all changes in this revision

Viewing changes to mandos

  • Committer: Teddy Hogeborn
  • Date: 2008-09-13 15:36:18 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080913153618-atp386q2bqj0ku99
* Makefile (install-client-nokey): Do "&&" instead of ";" to catch
                                   errors.

* README: Kill the straight quotes.  Add copyright notice.

* overview.xml: Improved wording.

Show diffs side-by-side

added added

removed removed

Lines of Context:
1
 
#!/usr/bin/python2.7
 
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
4
4
# Mandos server - give out binary blobs to connecting clients.
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", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
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".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008-2014 Teddy Hogeborn
15
 
# Copyright © 2008-2014 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
28
27
# along with this program.  If not, see
29
28
# <http://www.gnu.org/licenses/>.
30
29
31
 
# Contact the authors at <mandos@recompile.se>.
 
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
33
32
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
from future_builtins import *
38
 
 
39
 
import SocketServer as socketserver
 
33
from __future__ import division
 
34
 
 
35
import SocketServer
40
36
import socket
41
 
import argparse
 
37
import select
 
38
from optparse import OptionParser
42
39
import datetime
43
40
import errno
44
41
import gnutls.crypto
47
44
import gnutls.library.functions
48
45
import gnutls.library.constants
49
46
import gnutls.library.types
50
 
import ConfigParser as configparser
 
47
import ConfigParser
51
48
import sys
52
49
import re
53
50
import os
54
51
import signal
 
52
from sets import Set
55
53
import subprocess
56
54
import atexit
57
55
import stat
58
56
import logging
59
57
import logging.handlers
60
58
import pwd
61
 
import contextlib
62
 
import struct
63
 
import fcntl
64
 
import functools
65
 
import cPickle as pickle
66
 
import multiprocessing
67
 
import types
68
 
import binascii
69
 
import tempfile
70
 
import itertools
71
 
import collections
72
59
 
73
60
import dbus
74
 
import dbus.service
75
61
import gobject
76
62
import avahi
77
63
from dbus.mainloop.glib import DBusGMainLoop
78
64
import ctypes
79
 
import ctypes.util
80
 
import xml.dom.minidom
81
 
import inspect
82
 
 
83
 
try:
84
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
 
except AttributeError:
86
 
    try:
87
 
        from IN import SO_BINDTODEVICE
88
 
    except ImportError:
89
 
        SO_BINDTODEVICE = None
90
 
 
91
 
if sys.version_info.major == 2:
92
 
    str = unicode
93
 
 
94
 
version = "1.6.8"
95
 
stored_state_file = "clients.pickle"
96
 
 
97
 
logger = logging.getLogger()
98
 
syslogger = None
99
 
 
100
 
try:
101
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
102
 
                      (ctypes.util.find_library("c"))
103
 
                      .if_nametoindex)
104
 
except (OSError, AttributeError):
105
 
    def if_nametoindex(interface):
106
 
        "Get an interface index the hard way, i.e. using fcntl()"
107
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
108
 
        with contextlib.closing(socket.socket()) as s:
109
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
 
                                struct.pack(b"16s16x", interface))
111
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
112
 
        return interface_index
113
 
 
114
 
 
115
 
def initlogger(debug, level=logging.WARNING):
116
 
    """init logger and add loglevel"""
117
 
    
118
 
    global syslogger
119
 
    syslogger = (logging.handlers.SysLogHandler
120
 
                 (facility =
121
 
                  logging.handlers.SysLogHandler.LOG_DAEMON,
122
 
                  address = "/dev/log"))
123
 
    syslogger.setFormatter(logging.Formatter
124
 
                           ('Mandos [%(process)d]: %(levelname)s:'
125
 
                            ' %(message)s'))
126
 
    logger.addHandler(syslogger)
127
 
    
128
 
    if debug:
129
 
        console = logging.StreamHandler()
130
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
 
                                               ' [%(process)d]:'
132
 
                                               ' %(levelname)s:'
133
 
                                               ' %(message)s'))
134
 
        logger.addHandler(console)
135
 
    logger.setLevel(level)
136
 
 
137
 
 
138
 
class PGPError(Exception):
139
 
    """Exception if encryption/decryption fails"""
140
 
    pass
141
 
 
142
 
 
143
 
class PGPEngine(object):
144
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
145
 
    def __init__(self):
146
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
 
        self.gnupgargs = ['--batch',
148
 
                          '--home', self.tempdir,
149
 
                          '--force-mdc',
150
 
                          '--quiet',
151
 
                          '--no-use-agent']
152
 
    
153
 
    def __enter__(self):
154
 
        return self
155
 
    
156
 
    def __exit__(self, exc_type, exc_value, traceback):
157
 
        self._cleanup()
158
 
        return False
159
 
    
160
 
    def __del__(self):
161
 
        self._cleanup()
162
 
    
163
 
    def _cleanup(self):
164
 
        if self.tempdir is not None:
165
 
            # Delete contents of tempdir
166
 
            for root, dirs, files in os.walk(self.tempdir,
167
 
                                             topdown = False):
168
 
                for filename in files:
169
 
                    os.remove(os.path.join(root, filename))
170
 
                for dirname in dirs:
171
 
                    os.rmdir(os.path.join(root, dirname))
172
 
            # Remove tempdir
173
 
            os.rmdir(self.tempdir)
174
 
            self.tempdir = None
175
 
    
176
 
    def password_encode(self, password):
177
 
        # Passphrase can not be empty and can not contain newlines or
178
 
        # NUL bytes.  So we prefix it and hex encode it.
179
 
        encoded = b"mandos" + binascii.hexlify(password)
180
 
        if len(encoded) > 2048:
181
 
            # GnuPG can't handle long passwords, so encode differently
182
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
 
                       .replace(b"\n", b"\\n")
184
 
                       .replace(b"\0", b"\\x00"))
185
 
        return encoded
186
 
    
187
 
    def encrypt(self, data, password):
188
 
        passphrase = self.password_encode(password)
189
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
190
 
                                         ) as passfile:
191
 
            passfile.write(passphrase)
192
 
            passfile.flush()
193
 
            proc = subprocess.Popen(['gpg', '--symmetric',
194
 
                                     '--passphrase-file',
195
 
                                     passfile.name]
196
 
                                    + self.gnupgargs,
197
 
                                    stdin = subprocess.PIPE,
198
 
                                    stdout = subprocess.PIPE,
199
 
                                    stderr = subprocess.PIPE)
200
 
            ciphertext, err = proc.communicate(input = data)
201
 
        if proc.returncode != 0:
202
 
            raise PGPError(err)
203
 
        return ciphertext
204
 
    
205
 
    def decrypt(self, data, password):
206
 
        passphrase = self.password_encode(password)
207
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
208
 
                                         ) as passfile:
209
 
            passfile.write(passphrase)
210
 
            passfile.flush()
211
 
            proc = subprocess.Popen(['gpg', '--decrypt',
212
 
                                     '--passphrase-file',
213
 
                                     passfile.name]
214
 
                                    + self.gnupgargs,
215
 
                                    stdin = subprocess.PIPE,
216
 
                                    stdout = subprocess.PIPE,
217
 
                                    stderr = subprocess.PIPE)
218
 
            decrypted_plaintext, err = proc.communicate(input
219
 
                                                        = data)
220
 
        if proc.returncode != 0:
221
 
            raise PGPError(err)
222
 
        return decrypted_plaintext
223
 
 
 
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)
224
80
 
225
81
class AvahiError(Exception):
226
 
    def __init__(self, value, *args, **kwargs):
 
82
    def __init__(self, value):
227
83
        self.value = value
228
 
        return super(AvahiError, self).__init__(value, *args,
229
 
                                                **kwargs)
 
84
    def __str__(self):
 
85
        return repr(self.value)
230
86
 
231
87
class AvahiServiceError(AvahiError):
232
88
    pass
237
93
 
238
94
class AvahiService(object):
239
95
    """An Avahi (Zeroconf) service.
240
 
    
241
96
    Attributes:
242
97
    interface: integer; avahi.IF_UNSPEC or an interface index.
243
98
               Used to optionally bind to the specified interface.
244
99
    name: string; Example: 'Mandos'
245
100
    type: string; Example: '_mandos._tcp'.
246
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
 
101
                  See <http://www.dns-sd.org/ServiceTypes.html>
247
102
    port: integer; what port to announce
248
103
    TXT: list of strings; TXT record for the service
249
104
    domain: string; Domain to publish on, default to .local if empty.
251
106
    max_renames: integer; maximum number of renames
252
107
    rename_count: integer; counter so we only rename after collisions
253
108
                  a sensible number of times
254
 
    group: D-Bus Entry Group
255
 
    server: D-Bus Server
256
 
    bus: dbus.SystemBus()
257
109
    """
258
 
    
259
110
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
 
                 servicetype = None, port = None, TXT = None,
261
 
                 domain = "", host = "", max_renames = 32768,
262
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
111
                 type = None, port = None, TXT = None, domain = "",
 
112
                 host = "", max_renames = 32768):
263
113
        self.interface = interface
264
114
        self.name = name
265
 
        self.type = servicetype
 
115
        self.type = type
266
116
        self.port = port
267
 
        self.TXT = TXT if TXT is not None else []
 
117
        if TXT is None:
 
118
            self.TXT = []
 
119
        else:
 
120
            self.TXT = TXT
268
121
        self.domain = domain
269
122
        self.host = host
270
123
        self.rename_count = 0
271
124
        self.max_renames = max_renames
272
 
        self.protocol = protocol
273
 
        self.group = None       # our entry group
274
 
        self.server = None
275
 
        self.bus = bus
276
 
        self.entry_group_state_changed_match = None
277
 
    
278
125
    def rename(self):
279
126
        """Derived from the Avahi example code"""
280
127
        if self.rename_count >= self.max_renames:
281
 
            logger.critical("No suitable Zeroconf service name found"
282
 
                            " after %i retries, exiting.",
283
 
                            self.rename_count)
 
128
            logger.critical(u"No suitable Zeroconf service name found"
 
129
                            u" after %i retries, exiting.",
 
130
                            rename_count)
284
131
            raise AvahiServiceError("Too many renames")
285
 
        self.name = str(self.server
286
 
                        .GetAlternativeServiceName(self.name))
287
 
        logger.info("Changing Zeroconf service name to %r ...",
288
 
                    self.name)
 
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))
289
138
        self.remove()
290
 
        try:
291
 
            self.add()
292
 
        except dbus.exceptions.DBusException as error:
293
 
            logger.critical("D-Bus Exception", exc_info=error)
294
 
            self.cleanup()
295
 
            os._exit(1)
 
139
        self.add()
296
140
        self.rename_count += 1
297
 
    
298
141
    def remove(self):
299
142
        """Derived from the Avahi example code"""
300
 
        if self.entry_group_state_changed_match is not None:
301
 
            self.entry_group_state_changed_match.remove()
302
 
            self.entry_group_state_changed_match = None
303
 
        if self.group is not None:
304
 
            self.group.Reset()
305
 
    
 
143
        if group is not None:
 
144
            group.Reset()
306
145
    def add(self):
307
146
        """Derived from the Avahi example code"""
308
 
        self.remove()
309
 
        if self.group is None:
310
 
            self.group = dbus.Interface(
311
 
                self.bus.get_object(avahi.DBUS_NAME,
312
 
                                    self.server.EntryGroupNew()),
313
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
314
 
        self.entry_group_state_changed_match = (
315
 
            self.group.connect_to_signal(
316
 
                'StateChanged', self.entry_group_state_changed))
317
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
318
 
                     self.name, self.type)
319
 
        self.group.AddService(
320
 
            self.interface,
321
 
            self.protocol,
322
 
            dbus.UInt32(0),     # flags
323
 
            self.name, self.type,
324
 
            self.domain, self.host,
325
 
            dbus.UInt16(self.port),
326
 
            avahi.string_array_to_txt_array(self.TXT))
327
 
        self.group.Commit()
328
 
    
329
 
    def entry_group_state_changed(self, state, error):
330
 
        """Derived from the Avahi example code"""
331
 
        logger.debug("Avahi entry group state change: %i", state)
332
 
        
333
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
334
 
            logger.debug("Zeroconf service established.")
335
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
336
 
            logger.info("Zeroconf service name collision.")
337
 
            self.rename()
338
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
339
 
            logger.critical("Avahi: Error in group state changed %s",
340
 
                            str(error))
341
 
            raise AvahiGroupError("State changed: {!s}"
342
 
                                  .format(error))
343
 
    
344
 
    def cleanup(self):
345
 
        """Derived from the Avahi example code"""
346
 
        if self.group is not None:
347
 
            try:
348
 
                self.group.Free()
349
 
            except (dbus.exceptions.UnknownMethodException,
350
 
                    dbus.exceptions.DBusException):
351
 
                pass
352
 
            self.group = None
353
 
        self.remove()
354
 
    
355
 
    def server_state_changed(self, state, error=None):
356
 
        """Derived from the Avahi example code"""
357
 
        logger.debug("Avahi server state change: %i", state)
358
 
        bad_states = { avahi.SERVER_INVALID:
359
 
                           "Zeroconf server invalid",
360
 
                       avahi.SERVER_REGISTERING: None,
361
 
                       avahi.SERVER_COLLISION:
362
 
                           "Zeroconf server name collision",
363
 
                       avahi.SERVER_FAILURE:
364
 
                           "Zeroconf server failure" }
365
 
        if state in bad_states:
366
 
            if bad_states[state] is not None:
367
 
                if error is None:
368
 
                    logger.error(bad_states[state])
369
 
                else:
370
 
                    logger.error(bad_states[state] + ": %r", error)
371
 
            self.cleanup()
372
 
        elif state == avahi.SERVER_RUNNING:
373
 
            self.add()
374
 
        else:
375
 
            if error is None:
376
 
                logger.debug("Unknown state: %r", state)
377
 
            else:
378
 
                logger.debug("Unknown state: %r: %r", state, error)
379
 
    
380
 
    def activate(self):
381
 
        """Derived from the Avahi example code"""
382
 
        if self.server is None:
383
 
            self.server = dbus.Interface(
384
 
                self.bus.get_object(avahi.DBUS_NAME,
385
 
                                    avahi.DBUS_PATH_SERVER,
386
 
                                    follow_name_owner_changes=True),
387
 
                avahi.DBUS_INTERFACE_SERVER)
388
 
        self.server.connect_to_signal("StateChanged",
389
 
                                 self.server_state_changed)
390
 
        self.server_state_changed(self.server.GetState())
391
 
 
392
 
 
393
 
class AvahiServiceToSyslog(AvahiService):
394
 
    def rename(self):
395
 
        """Add the new name to the syslog messages"""
396
 
        ret = AvahiService.rename(self)
397
 
        syslogger.setFormatter(logging.Formatter
398
 
                               ('Mandos ({}) [%(process)d]:'
399
 
                                ' %(levelname)s: %(message)s'
400
 
                                .format(self.name)))
401
 
        return ret
 
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
402
170
 
403
171
 
404
172
class Client(object):
405
173
    """A representation of a client host served by this server.
406
 
    
407
174
    Attributes:
408
 
    approved:   bool(); 'None' if not yet approved/disapproved
409
 
    approval_delay: datetime.timedelta(); Time to wait for approval
410
 
    approval_duration: datetime.timedelta(); Duration of one approval
411
 
    checker:    subprocess.Popen(); a running checker process used
412
 
                                    to see if the client lives.
413
 
                                    'None' if no process is running.
414
 
    checker_callback_tag: a gobject event source tag, or None
415
 
    checker_command: string; External command which is run to check
416
 
                     if client lives.  %() expansions are done at
 
175
    name:      string; from the config file, used in log messages
 
176
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
177
                 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
417
194
                     runtime with vars(self) as dict, so that for
418
195
                     instance %(name)s can be used in the command.
419
 
    checker_initiator_tag: a gobject event source tag, or None
420
 
    created:    datetime.datetime(); (UTC) object creation
421
 
    client_structure: Object describing what attributes a client has
422
 
                      and is used for storing the client at exit
423
 
    current_checker_command: string; current running checker_command
424
 
    disable_initiator_tag: a gobject event source tag, or None
425
 
    enabled:    bool()
426
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
427
 
                 uniquely identify the client
428
 
    host:       string; available for use by the checker command
429
 
    interval:   datetime.timedelta(); How often to start a new checker
430
 
    last_approval_request: datetime.datetime(); (UTC) or None
431
 
    last_checked_ok: datetime.datetime(); (UTC) or None
432
 
    last_checker_status: integer between 0 and 255 reflecting exit
433
 
                         status of last checker. -1 reflects crashed
434
 
                         checker, -2 means no checker completed yet.
435
 
    last_enabled: datetime.datetime(); (UTC) or None
436
 
    name:       string; from the config file, used in log messages and
437
 
                        D-Bus identifiers
438
 
    secret:     bytestring; sent verbatim (over TLS) to client
439
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
440
 
                                      until this client is disabled
441
 
    extended_timeout:   extra long timeout when secret has been sent
442
 
    runtime_expansions: Allowed attributes for runtime expansion.
443
 
    expires:    datetime.datetime(); time (UTC) when a client will be
444
 
                disabled, or None
445
 
    server_settings: The server_settings dict from main()
 
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: - '' -
446
201
    """
447
 
    
448
 
    runtime_expansions = ("approval_delay", "approval_duration",
449
 
                          "created", "enabled", "expires",
450
 
                          "fingerprint", "host", "interval",
451
 
                          "last_approval_request", "last_checked_ok",
452
 
                          "last_enabled", "name", "timeout")
453
 
    client_defaults = { "timeout": "PT5M",
454
 
                        "extended_timeout": "PT15M",
455
 
                        "interval": "PT2M",
456
 
                        "checker": "fping -q -- %%(host)s",
457
 
                        "host": "",
458
 
                        "approval_delay": "PT0S",
459
 
                        "approval_duration": "PT1S",
460
 
                        "approved_by_default": "True",
461
 
                        "enabled": "True",
462
 
                        }
463
 
    
464
 
    @staticmethod
465
 
    def config_parser(config):
466
 
        """Construct a new dict of client settings of this form:
467
 
        { client_name: {setting_name: value, ...}, ...}
468
 
        with exceptions for any special settings as defined above.
469
 
        NOTE: Must be a pure function. Must return the same result
470
 
        value given the same arguments.
471
 
        """
472
 
        settings = {}
473
 
        for client_name in config.sections():
474
 
            section = dict(config.items(client_name))
475
 
            client = settings[client_name] = {}
476
 
            
477
 
            client["host"] = section["host"]
478
 
            # Reformat values from string types to Python types
479
 
            client["approved_by_default"] = config.getboolean(
480
 
                client_name, "approved_by_default")
481
 
            client["enabled"] = config.getboolean(client_name,
482
 
                                                  "enabled")
483
 
            
484
 
            client["fingerprint"] = (section["fingerprint"].upper()
485
 
                                     .replace(" ", ""))
486
 
            if "secret" in section:
487
 
                client["secret"] = section["secret"].decode("base64")
488
 
            elif "secfile" in section:
489
 
                with open(os.path.expanduser(os.path.expandvars
490
 
                                             (section["secfile"])),
491
 
                          "rb") as secfile:
492
 
                    client["secret"] = secfile.read()
493
 
            else:
494
 
                raise TypeError("No secret or secfile for section {}"
495
 
                                .format(section))
496
 
            client["timeout"] = string_to_delta(section["timeout"])
497
 
            client["extended_timeout"] = string_to_delta(
498
 
                section["extended_timeout"])
499
 
            client["interval"] = string_to_delta(section["interval"])
500
 
            client["approval_delay"] = string_to_delta(
501
 
                section["approval_delay"])
502
 
            client["approval_duration"] = string_to_delta(
503
 
                section["approval_duration"])
504
 
            client["checker_command"] = section["checker"]
505
 
            client["last_approval_request"] = None
506
 
            client["last_checked_ok"] = None
507
 
            client["last_checker_status"] = -2
508
 
        
509
 
        return settings
510
 
    
511
 
    def __init__(self, settings, name = None, server_settings=None):
 
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."""
512
229
        self.name = name
513
 
        if server_settings is None:
514
 
            server_settings = {}
515
 
        self.server_settings = server_settings
516
 
        # adding all client settings
517
 
        for setting, value in settings.items():
518
 
            setattr(self, setting, value)
519
 
        
520
 
        if self.enabled:
521
 
            if not hasattr(self, "last_enabled"):
522
 
                self.last_enabled = datetime.datetime.utcnow()
523
 
            if not hasattr(self, "expires"):
524
 
                self.expires = (datetime.datetime.utcnow()
525
 
                                + self.timeout)
526
 
        else:
527
 
            self.last_enabled = None
528
 
            self.expires = None
529
 
        
530
 
        logger.debug("Creating client %r", self.name)
 
230
        logger.debug(u"Creating client %r", self.name)
531
231
        # Uppercase and remove spaces from fingerprint for later
532
232
        # comparison purposes with return value from the fingerprint()
533
233
        # function
534
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
535
 
        self.created = settings.get("created",
536
 
                                    datetime.datetime.utcnow())
537
 
        
538
 
        # attributes specific for this server instance
 
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
539
252
        self.checker = None
540
253
        self.checker_initiator_tag = None
541
 
        self.disable_initiator_tag = None
 
254
        self.stop_initiator_tag = None
542
255
        self.checker_callback_tag = None
543
 
        self.current_checker_command = None
544
 
        self.approved = None
545
 
        self.approvals_pending = 0
546
 
        self.changedstate = (multiprocessing_manager
547
 
                             .Condition(multiprocessing_manager
548
 
                                        .Lock()))
549
 
        self.client_structure = [attr for attr in
550
 
                                 self.__dict__.iterkeys()
551
 
                                 if not attr.startswith("_")]
552
 
        self.client_structure.append("client_structure")
553
 
        
554
 
        for name, t in inspect.getmembers(type(self),
555
 
                                          lambda obj:
556
 
                                              isinstance(obj,
557
 
                                                         property)):
558
 
            if not name.startswith("_"):
559
 
                self.client_structure.append(name)
560
 
    
561
 
    # Send notice to process children that client state has changed
562
 
    def send_changedstate(self):
563
 
        with self.changedstate:
564
 
            self.changedstate.notify_all()
565
 
    
566
 
    def enable(self):
 
256
        self.check_command = config["checker"]
 
257
    def start(self):
567
258
        """Start this client's checker and timeout hooks"""
568
 
        if getattr(self, "enabled", False):
569
 
            # Already enabled
570
 
            return
571
 
        self.expires = datetime.datetime.utcnow() + self.timeout
572
 
        self.enabled = True
573
 
        self.last_enabled = datetime.datetime.utcnow()
574
 
        self.init_checker()
575
 
        self.send_changedstate()
576
 
    
577
 
    def disable(self, quiet=True):
578
 
        """Disable this client."""
579
 
        if not getattr(self, "enabled", False):
580
 
            return False
581
 
        if not quiet:
582
 
            logger.info("Disabling client %s", self.name)
583
 
        if getattr(self, "disable_initiator_tag", None) is not None:
584
 
            gobject.source_remove(self.disable_initiator_tag)
585
 
            self.disable_initiator_tag = None
586
 
        self.expires = None
587
 
        if getattr(self, "checker_initiator_tag", None) is not None:
588
 
            gobject.source_remove(self.checker_initiator_tag)
589
 
            self.checker_initiator_tag = None
590
 
        self.stop_checker()
591
 
        self.enabled = False
592
 
        if not quiet:
593
 
            self.send_changedstate()
594
 
        # Do not run this again if called by a gobject.timeout_add
595
 
        return False
596
 
    
597
 
    def __del__(self):
598
 
        self.disable()
599
 
    
600
 
    def init_checker(self):
601
259
        # Schedule a new checker to be started an 'interval' from now,
602
260
        # and every interval from then on.
603
 
        if self.checker_initiator_tag is not None:
604
 
            gobject.source_remove(self.checker_initiator_tag)
605
 
        self.checker_initiator_tag = (gobject.timeout_add
606
 
                                      (int(self.interval
607
 
                                           .total_seconds() * 1000),
608
 
                                       self.start_checker))
609
 
        # Schedule a disable() when 'timeout' has passed
610
 
        if self.disable_initiator_tag is not None:
611
 
            gobject.source_remove(self.disable_initiator_tag)
612
 
        self.disable_initiator_tag = (gobject.timeout_add
613
 
                                      (int(self.timeout
614
 
                                           .total_seconds() * 1000),
615
 
                                       self.disable))
 
261
        self.checker_initiator_tag = gobject.timeout_add\
 
262
                                     (self._interval_milliseconds,
 
263
                                      self.start_checker)
616
264
        # Also start a new checker *right now*.
617
265
        self.start_checker()
618
 
    
619
 
    def checker_callback(self, pid, condition, command):
 
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):
620
295
        """The checker has completed, so take appropriate actions."""
 
296
        now = datetime.datetime.now()
621
297
        self.checker_callback_tag = None
622
298
        self.checker = None
623
 
        if os.WIFEXITED(condition):
624
 
            self.last_checker_status = os.WEXITSTATUS(condition)
625
 
            if self.last_checker_status == 0:
626
 
                logger.info("Checker for %(name)s succeeded",
627
 
                            vars(self))
628
 
                self.checked_ok()
629
 
            else:
630
 
                logger.info("Checker for %(name)s failed",
631
 
                            vars(self))
632
 
        else:
633
 
            self.last_checker_status = -1
634
 
            logger.warning("Checker for %(name)s crashed?",
 
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?",
635
310
                           vars(self))
636
 
    
637
 
    def checked_ok(self):
638
 
        """Assert that the client has been seen, alive and well."""
639
 
        self.last_checked_ok = datetime.datetime.utcnow()
640
 
        self.last_checker_status = 0
641
 
        self.bump_timeout()
642
 
    
643
 
    def bump_timeout(self, timeout=None):
644
 
        """Bump up the timeout for this client."""
645
 
        if timeout is None:
646
 
            timeout = self.timeout
647
 
        if self.disable_initiator_tag is not None:
648
 
            gobject.source_remove(self.disable_initiator_tag)
649
 
            self.disable_initiator_tag = None
650
 
        if getattr(self, "enabled", False):
651
 
            self.disable_initiator_tag = (gobject.timeout_add
652
 
                                          (int(timeout.total_seconds()
653
 
                                               * 1000), self.disable))
654
 
            self.expires = datetime.datetime.utcnow() + timeout
655
 
    
656
 
    def need_approval(self):
657
 
        self.last_approval_request = datetime.datetime.utcnow()
658
 
    
 
311
        else:
 
312
            logger.info(u"Checker for %(name)s failed",
 
313
                        vars(self))
659
314
    def start_checker(self):
660
315
        """Start a new checker subprocess if one is not running.
661
 
        
662
316
        If a checker already exists, leave it running and do
663
317
        nothing."""
664
318
        # The reason for not killing a running checker is that if we
665
 
        # did that, and if a checker (for some reason) started running
666
 
        # slowly and taking more than 'interval' time, then the client
667
 
        # would inevitably timeout, since no checker would get a
668
 
        # chance to run to completion.  If we instead leave running
 
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
669
323
        # checkers alone, the checker would have to take more time
670
 
        # than 'timeout' for the client to be disabled, which is as it
671
 
        # should be.
672
 
        
673
 
        # If a checker exists, make sure it is not a zombie
674
 
        try:
675
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
676
 
        except AttributeError:
677
 
            pass
678
 
        except OSError as error:
679
 
            if error.errno != errno.ECHILD:
680
 
                raise
681
 
        else:
682
 
            if pid:
683
 
                logger.warning("Checker was a zombie")
684
 
                gobject.source_remove(self.checker_callback_tag)
685
 
                self.checker_callback(pid, status,
686
 
                                      self.current_checker_command)
687
 
        # Start a new checker if needed
 
324
        # than 'timeout' for the client to be declared invalid, which
 
325
        # is as it should be.
688
326
        if self.checker is None:
689
 
            # Escape attributes for the shell
690
 
            escaped_attrs = { attr:
691
 
                                  re.escape(str(getattr(self, attr)))
692
 
                              for attr in self.runtime_expansions }
693
 
            try:
694
 
                command = self.checker_command % escaped_attrs
695
 
            except TypeError as error:
696
 
                logger.error('Could not format string "%s"',
697
 
                             self.checker_command, exc_info=error)
698
 
                return True # Try again later
699
 
            self.current_checker_command = command
700
 
            try:
701
 
                logger.info("Starting checker %r for %s",
 
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",
702
343
                            command, self.name)
703
344
                # We don't need to redirect stdout and stderr, since
704
345
                # in normal mode, that is already done by daemon(),
705
346
                # and in debug mode we don't want to.  (Stdin is
706
347
                # always replaced by /dev/null.)
707
 
                # The exception is when not debugging but nevertheless
708
 
                # running in the foreground; use the previously
709
 
                # created wnull.
710
 
                popen_args = {}
711
 
                if (not self.server_settings["debug"]
712
 
                    and self.server_settings["foreground"]):
713
 
                    popen_args.update({"stdout": wnull,
714
 
                                       "stderr": wnull })
715
348
                self.checker = subprocess.Popen(command,
716
349
                                                close_fds=True,
717
 
                                                shell=True, cwd="/",
718
 
                                                **popen_args)
719
 
            except OSError as error:
720
 
                logger.error("Failed to start subprocess",
721
 
                             exc_info=error)
722
 
                return True
723
 
            self.checker_callback_tag = (gobject.child_watch_add
724
 
                                         (self.checker.pid,
725
 
                                          self.checker_callback,
726
 
                                          data=command))
727
 
            # The checker may have completed before the gobject
728
 
            # watch was added.  Check for this.
729
 
            try:
730
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
731
 
            except OSError as error:
732
 
                if error.errno == errno.ECHILD:
733
 
                    # This should never happen
734
 
                    logger.error("Child process vanished",
735
 
                                 exc_info=error)
736
 
                    return True
737
 
                raise
738
 
            if pid:
739
 
                gobject.source_remove(self.checker_callback_tag)
740
 
                self.checker_callback(pid, status, command)
 
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)
741
357
        # Re-run this periodically if run by gobject.timeout_add
742
358
        return True
743
 
    
744
359
    def stop_checker(self):
745
360
        """Force the checker process, if any, to stop."""
746
361
        if self.checker_callback_tag:
748
363
            self.checker_callback_tag = None
749
364
        if getattr(self, "checker", None) is None:
750
365
            return
751
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
366
        logger.debug(u"Stopping checker for %(name)s", vars(self))
752
367
        try:
753
 
            self.checker.terminate()
754
 
            #time.sleep(0.5)
 
368
            os.kill(self.checker.pid, signal.SIGTERM)
 
369
            #os.sleep(0.5)
755
370
            #if self.checker.poll() is None:
756
 
            #    self.checker.kill()
757
 
        except OSError as error:
 
371
            #    os.kill(self.checker.pid, signal.SIGKILL)
 
372
        except OSError, error:
758
373
            if error.errno != errno.ESRCH: # No such process
759
374
                raise
760
375
        self.checker = None
761
 
 
762
 
 
763
 
def dbus_service_property(dbus_interface, signature="v",
764
 
                          access="readwrite", byte_arrays=False):
765
 
    """Decorators for marking methods of a DBusObjectWithProperties to
766
 
    become properties on the D-Bus.
767
 
    
768
 
    The decorated method will be called with no arguments by "Get"
769
 
    and with one argument by "Set".
770
 
    
771
 
    The parameters, where they are supported, are the same as
772
 
    dbus.service.method, except there is only "signature", since the
773
 
    type from Get() and the type sent to Set() is the same.
774
 
    """
775
 
    # Encoding deeply encoded byte arrays is not supported yet by the
776
 
    # "Set" method, so we fail early here:
777
 
    if byte_arrays and signature != "ay":
778
 
        raise ValueError("Byte arrays not supported for non-'ay'"
779
 
                         " signature {!r}".format(signature))
780
 
    def decorator(func):
781
 
        func._dbus_is_property = True
782
 
        func._dbus_interface = dbus_interface
783
 
        func._dbus_signature = signature
784
 
        func._dbus_access = access
785
 
        func._dbus_name = func.__name__
786
 
        if func._dbus_name.endswith("_dbus_property"):
787
 
            func._dbus_name = func._dbus_name[:-14]
788
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
789
 
        return func
790
 
    return decorator
791
 
 
792
 
 
793
 
def dbus_interface_annotations(dbus_interface):
794
 
    """Decorator for marking functions returning interface annotations
795
 
    
796
 
    Usage:
797
 
    
798
 
    @dbus_interface_annotations("org.example.Interface")
799
 
    def _foo(self):  # Function name does not matter
800
 
        return {"org.freedesktop.DBus.Deprecated": "true",
801
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
802
 
                    "false"}
803
 
    """
804
 
    def decorator(func):
805
 
        func._dbus_is_interface = True
806
 
        func._dbus_interface = dbus_interface
807
 
        func._dbus_name = dbus_interface
808
 
        return func
809
 
    return decorator
810
 
 
811
 
 
812
 
def dbus_annotations(annotations):
813
 
    """Decorator to annotate D-Bus methods, signals or properties
814
 
    Usage:
815
 
    
816
 
    @dbus_service_property("org.example.Interface", signature="b",
817
 
                           access="r")
818
 
    @dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
819
 
                        "org.freedesktop.DBus.Property."
820
 
                        "EmitsChangedSignal": "false"})
821
 
    def Property_dbus_property(self):
822
 
        return dbus.Boolean(False)
823
 
    """
824
 
    def decorator(func):
825
 
        func._dbus_annotations = annotations
826
 
        return func
827
 
    return decorator
828
 
 
829
 
 
830
 
class DBusPropertyException(dbus.exceptions.DBusException):
831
 
    """A base class for D-Bus property-related exceptions
832
 
    """
833
 
    pass
834
 
 
835
 
class DBusPropertyAccessException(DBusPropertyException):
836
 
    """A property's access permissions disallows an operation.
837
 
    """
838
 
    pass
839
 
 
840
 
 
841
 
class DBusPropertyNotFound(DBusPropertyException):
842
 
    """An attempt was made to access a non-existing property.
843
 
    """
844
 
    pass
845
 
 
846
 
 
847
 
class DBusObjectWithProperties(dbus.service.Object):
848
 
    """A D-Bus object with properties.
849
 
    
850
 
    Classes inheriting from this can use the dbus_service_property
851
 
    decorator to expose methods as D-Bus properties.  It exposes the
852
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
853
 
    """
854
 
    
855
 
    @staticmethod
856
 
    def _is_dbus_thing(thing):
857
 
        """Returns a function testing if an attribute is a D-Bus thing
858
 
        
859
 
        If called like _is_dbus_thing("method") it returns a function
860
 
        suitable for use as predicate to inspect.getmembers().
861
 
        """
862
 
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
863
 
                                   False)
864
 
    
865
 
    def _get_all_dbus_things(self, thing):
866
 
        """Returns a generator of (name, attribute) pairs
867
 
        """
868
 
        return ((getattr(athing.__get__(self), "_dbus_name",
869
 
                         name),
870
 
                 athing.__get__(self))
871
 
                for cls in self.__class__.__mro__
872
 
                for name, athing in
873
 
                inspect.getmembers(cls,
874
 
                                   self._is_dbus_thing(thing)))
875
 
    
876
 
    def _get_dbus_property(self, interface_name, property_name):
877
 
        """Returns a bound method if one exists which is a D-Bus
878
 
        property with the specified name and interface.
879
 
        """
880
 
        for cls in  self.__class__.__mro__:
881
 
            for name, value in (inspect.getmembers
882
 
                                (cls,
883
 
                                 self._is_dbus_thing("property"))):
884
 
                if (value._dbus_name == property_name
885
 
                    and value._dbus_interface == interface_name):
886
 
                    return value.__get__(self)
887
 
        
888
 
        # No such property
889
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
890
 
                                   + interface_name + "."
891
 
                                   + property_name)
892
 
    
893
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
894
 
                         out_signature="v")
895
 
    def Get(self, interface_name, property_name):
896
 
        """Standard D-Bus property Get() method, see D-Bus standard.
897
 
        """
898
 
        prop = self._get_dbus_property(interface_name, property_name)
899
 
        if prop._dbus_access == "write":
900
 
            raise DBusPropertyAccessException(property_name)
901
 
        value = prop()
902
 
        if not hasattr(value, "variant_level"):
903
 
            return value
904
 
        return type(value)(value, variant_level=value.variant_level+1)
905
 
    
906
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
907
 
    def Set(self, interface_name, property_name, value):
908
 
        """Standard D-Bus property Set() method, see D-Bus standard.
909
 
        """
910
 
        prop = self._get_dbus_property(interface_name, property_name)
911
 
        if prop._dbus_access == "read":
912
 
            raise DBusPropertyAccessException(property_name)
913
 
        if prop._dbus_get_args_options["byte_arrays"]:
914
 
            # The byte_arrays option is not supported yet on
915
 
            # signatures other than "ay".
916
 
            if prop._dbus_signature != "ay":
917
 
                raise ValueError("Byte arrays not supported for non-"
918
 
                                 "'ay' signature {!r}"
919
 
                                 .format(prop._dbus_signature))
920
 
            value = dbus.ByteArray(b''.join(chr(byte)
921
 
                                            for byte in value))
922
 
        prop(value)
923
 
    
924
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
925
 
                         out_signature="a{sv}")
926
 
    def GetAll(self, interface_name):
927
 
        """Standard D-Bus property GetAll() method, see D-Bus
928
 
        standard.
929
 
        
930
 
        Note: Will not include properties with access="write".
931
 
        """
932
 
        properties = {}
933
 
        for name, prop in self._get_all_dbus_things("property"):
934
 
            if (interface_name
935
 
                and interface_name != prop._dbus_interface):
936
 
                # Interface non-empty but did not match
937
 
                continue
938
 
            # Ignore write-only properties
939
 
            if prop._dbus_access == "write":
940
 
                continue
941
 
            value = prop()
942
 
            if not hasattr(value, "variant_level"):
943
 
                properties[name] = value
944
 
                continue
945
 
            properties[name] = type(value)(value, variant_level=
946
 
                                           value.variant_level+1)
947
 
        return dbus.Dictionary(properties, signature="sv")
948
 
    
949
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
950
 
                         out_signature="s",
951
 
                         path_keyword='object_path',
952
 
                         connection_keyword='connection')
953
 
    def Introspect(self, object_path, connection):
954
 
        """Overloading of standard D-Bus method.
955
 
        
956
 
        Inserts property tags and interface annotation tags.
957
 
        """
958
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
959
 
                                                   connection)
960
 
        try:
961
 
            document = xml.dom.minidom.parseString(xmlstring)
962
 
            def make_tag(document, name, prop):
963
 
                e = document.createElement("property")
964
 
                e.setAttribute("name", name)
965
 
                e.setAttribute("type", prop._dbus_signature)
966
 
                e.setAttribute("access", prop._dbus_access)
967
 
                return e
968
 
            for if_tag in document.getElementsByTagName("interface"):
969
 
                # Add property tags
970
 
                for tag in (make_tag(document, name, prop)
971
 
                            for name, prop
972
 
                            in self._get_all_dbus_things("property")
973
 
                            if prop._dbus_interface
974
 
                            == if_tag.getAttribute("name")):
975
 
                    if_tag.appendChild(tag)
976
 
                # Add annotation tags
977
 
                for typ in ("method", "signal", "property"):
978
 
                    for tag in if_tag.getElementsByTagName(typ):
979
 
                        annots = dict()
980
 
                        for name, prop in (self.
981
 
                                           _get_all_dbus_things(typ)):
982
 
                            if (name == tag.getAttribute("name")
983
 
                                and prop._dbus_interface
984
 
                                == if_tag.getAttribute("name")):
985
 
                                annots.update(getattr
986
 
                                              (prop,
987
 
                                               "_dbus_annotations",
988
 
                                               {}))
989
 
                        for name, value in annots.items():
990
 
                            ann_tag = document.createElement(
991
 
                                "annotation")
992
 
                            ann_tag.setAttribute("name", name)
993
 
                            ann_tag.setAttribute("value", value)
994
 
                            tag.appendChild(ann_tag)
995
 
                # Add interface annotation tags
996
 
                for annotation, value in dict(
997
 
                    itertools.chain.from_iterable(
998
 
                        annotations().items()
999
 
                        for name, annotations in
1000
 
                        self._get_all_dbus_things("interface")
1001
 
                        if name == if_tag.getAttribute("name")
1002
 
                        )).items():
1003
 
                    ann_tag = document.createElement("annotation")
1004
 
                    ann_tag.setAttribute("name", annotation)
1005
 
                    ann_tag.setAttribute("value", value)
1006
 
                    if_tag.appendChild(ann_tag)
1007
 
                # Add the names to the return values for the
1008
 
                # "org.freedesktop.DBus.Properties" methods
1009
 
                if (if_tag.getAttribute("name")
1010
 
                    == "org.freedesktop.DBus.Properties"):
1011
 
                    for cn in if_tag.getElementsByTagName("method"):
1012
 
                        if cn.getAttribute("name") == "Get":
1013
 
                            for arg in cn.getElementsByTagName("arg"):
1014
 
                                if (arg.getAttribute("direction")
1015
 
                                    == "out"):
1016
 
                                    arg.setAttribute("name", "value")
1017
 
                        elif cn.getAttribute("name") == "GetAll":
1018
 
                            for arg in cn.getElementsByTagName("arg"):
1019
 
                                if (arg.getAttribute("direction")
1020
 
                                    == "out"):
1021
 
                                    arg.setAttribute("name", "props")
1022
 
            xmlstring = document.toxml("utf-8")
1023
 
            document.unlink()
1024
 
        except (AttributeError, xml.dom.DOMException,
1025
 
                xml.parsers.expat.ExpatError) as error:
1026
 
            logger.error("Failed to override Introspection method",
1027
 
                         exc_info=error)
1028
 
        return xmlstring
1029
 
 
1030
 
 
1031
 
def datetime_to_dbus(dt, variant_level=0):
1032
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1033
 
    if dt is None:
1034
 
        return dbus.String("", variant_level = variant_level)
1035
 
    return dbus.String(dt.isoformat(),
1036
 
                       variant_level=variant_level)
1037
 
 
1038
 
 
1039
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1040
 
    """A class decorator; applied to a subclass of
1041
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1042
 
    interface names according to the "alt_interface_names" mapping.
1043
 
    Usage:
1044
 
    
1045
 
    @alternate_dbus_interfaces({"org.example.Interface":
1046
 
                                    "net.example.AlternateInterface"})
1047
 
    class SampleDBusObject(dbus.service.Object):
1048
 
        @dbus.service.method("org.example.Interface")
1049
 
        def SampleDBusMethod():
1050
 
            pass
1051
 
    
1052
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1053
 
    reachable via two interfaces: "org.example.Interface" and
1054
 
    "net.example.AlternateInterface", the latter of which will have
1055
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1056
 
    "true", unless "deprecate" is passed with a False value.
1057
 
    
1058
 
    This works for methods and signals, and also for D-Bus properties
1059
 
    (from DBusObjectWithProperties) and interfaces (from the
1060
 
    dbus_interface_annotations decorator).
1061
 
    """
1062
 
    def wrapper(cls):
1063
 
        for orig_interface_name, alt_interface_name in (
1064
 
            alt_interface_names.items()):
1065
 
            attr = {}
1066
 
            interface_names = set()
1067
 
            # Go though all attributes of the class
1068
 
            for attrname, attribute in inspect.getmembers(cls):
1069
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1070
 
                # with the wrong interface name
1071
 
                if (not hasattr(attribute, "_dbus_interface")
1072
 
                    or not attribute._dbus_interface
1073
 
                    .startswith(orig_interface_name)):
1074
 
                    continue
1075
 
                # Create an alternate D-Bus interface name based on
1076
 
                # the current name
1077
 
                alt_interface = (attribute._dbus_interface
1078
 
                                 .replace(orig_interface_name,
1079
 
                                          alt_interface_name))
1080
 
                interface_names.add(alt_interface)
1081
 
                # Is this a D-Bus signal?
1082
 
                if getattr(attribute, "_dbus_is_signal", False):
1083
 
                    # Extract the original non-method undecorated
1084
 
                    # function by black magic
1085
 
                    nonmethod_func = (dict(
1086
 
                            zip(attribute.func_code.co_freevars,
1087
 
                                attribute.__closure__))["func"]
1088
 
                                      .cell_contents)
1089
 
                    # Create a new, but exactly alike, function
1090
 
                    # object, and decorate it to be a new D-Bus signal
1091
 
                    # with the alternate D-Bus interface name
1092
 
                    new_function = (dbus.service.signal
1093
 
                                    (alt_interface,
1094
 
                                     attribute._dbus_signature)
1095
 
                                    (types.FunctionType(
1096
 
                                nonmethod_func.func_code,
1097
 
                                nonmethod_func.func_globals,
1098
 
                                nonmethod_func.func_name,
1099
 
                                nonmethod_func.func_defaults,
1100
 
                                nonmethod_func.func_closure)))
1101
 
                    # Copy annotations, if any
1102
 
                    try:
1103
 
                        new_function._dbus_annotations = (
1104
 
                            dict(attribute._dbus_annotations))
1105
 
                    except AttributeError:
1106
 
                        pass
1107
 
                    # Define a creator of a function to call both the
1108
 
                    # original and alternate functions, so both the
1109
 
                    # original and alternate signals gets sent when
1110
 
                    # the function is called
1111
 
                    def fixscope(func1, func2):
1112
 
                        """This function is a scope container to pass
1113
 
                        func1 and func2 to the "call_both" function
1114
 
                        outside of its arguments"""
1115
 
                        def call_both(*args, **kwargs):
1116
 
                            """This function will emit two D-Bus
1117
 
                            signals by calling func1 and func2"""
1118
 
                            func1(*args, **kwargs)
1119
 
                            func2(*args, **kwargs)
1120
 
                        return call_both
1121
 
                    # Create the "call_both" function and add it to
1122
 
                    # the class
1123
 
                    attr[attrname] = fixscope(attribute, new_function)
1124
 
                # Is this a D-Bus method?
1125
 
                elif getattr(attribute, "_dbus_is_method", False):
1126
 
                    # Create a new, but exactly alike, function
1127
 
                    # object.  Decorate it to be a new D-Bus method
1128
 
                    # with the alternate D-Bus interface name.  Add it
1129
 
                    # to the class.
1130
 
                    attr[attrname] = (dbus.service.method
1131
 
                                      (alt_interface,
1132
 
                                       attribute._dbus_in_signature,
1133
 
                                       attribute._dbus_out_signature)
1134
 
                                      (types.FunctionType
1135
 
                                       (attribute.func_code,
1136
 
                                        attribute.func_globals,
1137
 
                                        attribute.func_name,
1138
 
                                        attribute.func_defaults,
1139
 
                                        attribute.func_closure)))
1140
 
                    # Copy annotations, if any
1141
 
                    try:
1142
 
                        attr[attrname]._dbus_annotations = (
1143
 
                            dict(attribute._dbus_annotations))
1144
 
                    except AttributeError:
1145
 
                        pass
1146
 
                # Is this a D-Bus property?
1147
 
                elif getattr(attribute, "_dbus_is_property", False):
1148
 
                    # Create a new, but exactly alike, function
1149
 
                    # object, and decorate it to be a new D-Bus
1150
 
                    # property with the alternate D-Bus interface
1151
 
                    # name.  Add it to the class.
1152
 
                    attr[attrname] = (dbus_service_property
1153
 
                                      (alt_interface,
1154
 
                                       attribute._dbus_signature,
1155
 
                                       attribute._dbus_access,
1156
 
                                       attribute
1157
 
                                       ._dbus_get_args_options
1158
 
                                       ["byte_arrays"])
1159
 
                                      (types.FunctionType
1160
 
                                       (attribute.func_code,
1161
 
                                        attribute.func_globals,
1162
 
                                        attribute.func_name,
1163
 
                                        attribute.func_defaults,
1164
 
                                        attribute.func_closure)))
1165
 
                    # Copy annotations, if any
1166
 
                    try:
1167
 
                        attr[attrname]._dbus_annotations = (
1168
 
                            dict(attribute._dbus_annotations))
1169
 
                    except AttributeError:
1170
 
                        pass
1171
 
                # Is this a D-Bus interface?
1172
 
                elif getattr(attribute, "_dbus_is_interface", False):
1173
 
                    # Create a new, but exactly alike, function
1174
 
                    # object.  Decorate it to be a new D-Bus interface
1175
 
                    # with the alternate D-Bus interface name.  Add it
1176
 
                    # to the class.
1177
 
                    attr[attrname] = (dbus_interface_annotations
1178
 
                                      (alt_interface)
1179
 
                                      (types.FunctionType
1180
 
                                       (attribute.func_code,
1181
 
                                        attribute.func_globals,
1182
 
                                        attribute.func_name,
1183
 
                                        attribute.func_defaults,
1184
 
                                        attribute.func_closure)))
1185
 
            if deprecate:
1186
 
                # Deprecate all alternate interfaces
1187
 
                iname="_AlternateDBusNames_interface_annotation{}"
1188
 
                for interface_name in interface_names:
1189
 
                    @dbus_interface_annotations(interface_name)
1190
 
                    def func(self):
1191
 
                        return { "org.freedesktop.DBus.Deprecated":
1192
 
                                     "true" }
1193
 
                    # Find an unused name
1194
 
                    for aname in (iname.format(i)
1195
 
                                  for i in itertools.count()):
1196
 
                        if aname not in attr:
1197
 
                            attr[aname] = func
1198
 
                            break
1199
 
            if interface_names:
1200
 
                # Replace the class with a new subclass of it with
1201
 
                # methods, signals, etc. as created above.
1202
 
                cls = type(b"{}Alternate".format(cls.__name__),
1203
 
                           (cls,), attr)
1204
 
        return cls
1205
 
    return wrapper
1206
 
 
1207
 
 
1208
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1209
 
                                "se.bsnet.fukt.Mandos"})
1210
 
class ClientDBus(Client, DBusObjectWithProperties):
1211
 
    """A Client class using D-Bus
1212
 
    
1213
 
    Attributes:
1214
 
    dbus_object_path: dbus.ObjectPath
1215
 
    bus: dbus.SystemBus()
1216
 
    """
1217
 
    
1218
 
    runtime_expansions = (Client.runtime_expansions
1219
 
                          + ("dbus_object_path",))
1220
 
    
1221
 
    # dbus.service.Object doesn't use super(), so we can't either.
1222
 
    
1223
 
    def __init__(self, bus = None, *args, **kwargs):
1224
 
        self.bus = bus
1225
 
        Client.__init__(self, *args, **kwargs)
1226
 
        # Only now, when this client is initialized, can it show up on
1227
 
        # the D-Bus
1228
 
        client_object_name = str(self.name).translate(
1229
 
            {ord("."): ord("_"),
1230
 
             ord("-"): ord("_")})
1231
 
        self.dbus_object_path = (dbus.ObjectPath
1232
 
                                 ("/clients/" + client_object_name))
1233
 
        DBusObjectWithProperties.__init__(self, self.bus,
1234
 
                                          self.dbus_object_path)
1235
 
    
1236
 
    def notifychangeproperty(transform_func,
1237
 
                             dbus_name, type_func=lambda x: x,
1238
 
                             variant_level=1):
1239
 
        """ Modify a variable so that it's a property which announces
1240
 
        its changes to DBus.
1241
 
        
1242
 
        transform_fun: Function that takes a value and a variant_level
1243
 
                       and transforms it to a D-Bus type.
1244
 
        dbus_name: D-Bus name of the variable
1245
 
        type_func: Function that transform the value before sending it
1246
 
                   to the D-Bus.  Default: no transform
1247
 
        variant_level: D-Bus variant level.  Default: 1
1248
 
        """
1249
 
        attrname = "_{}".format(dbus_name)
1250
 
        def setter(self, value):
1251
 
            if hasattr(self, "dbus_object_path"):
1252
 
                if (not hasattr(self, attrname) or
1253
 
                    type_func(getattr(self, attrname, None))
1254
 
                    != type_func(value)):
1255
 
                    dbus_value = transform_func(type_func(value),
1256
 
                                                variant_level
1257
 
                                                =variant_level)
1258
 
                    self.PropertyChanged(dbus.String(dbus_name),
1259
 
                                         dbus_value)
1260
 
            setattr(self, attrname, value)
1261
 
        
1262
 
        return property(lambda self: getattr(self, attrname), setter)
1263
 
    
1264
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1265
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1266
 
                                             "ApprovalPending",
1267
 
                                             type_func = bool)
1268
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1269
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1270
 
                                        "LastEnabled")
1271
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1272
 
                                   type_func = lambda checker:
1273
 
                                       checker is not None)
1274
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1275
 
                                           "LastCheckedOK")
1276
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1277
 
                                               "LastCheckerStatus")
1278
 
    last_approval_request = notifychangeproperty(
1279
 
        datetime_to_dbus, "LastApprovalRequest")
1280
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1281
 
                                               "ApprovedByDefault")
1282
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1283
 
                                          "ApprovalDelay",
1284
 
                                          type_func =
1285
 
                                          lambda td: td.total_seconds()
1286
 
                                          * 1000)
1287
 
    approval_duration = notifychangeproperty(
1288
 
        dbus.UInt64, "ApprovalDuration",
1289
 
        type_func = lambda td: td.total_seconds() * 1000)
1290
 
    host = notifychangeproperty(dbus.String, "Host")
1291
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1292
 
                                   type_func = lambda td:
1293
 
                                       td.total_seconds() * 1000)
1294
 
    extended_timeout = notifychangeproperty(
1295
 
        dbus.UInt64, "ExtendedTimeout",
1296
 
        type_func = lambda td: td.total_seconds() * 1000)
1297
 
    interval = notifychangeproperty(dbus.UInt64,
1298
 
                                    "Interval",
1299
 
                                    type_func =
1300
 
                                    lambda td: td.total_seconds()
1301
 
                                    * 1000)
1302
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1303
 
    
1304
 
    del notifychangeproperty
1305
 
    
1306
 
    def __del__(self, *args, **kwargs):
1307
 
        try:
1308
 
            self.remove_from_connection()
1309
 
        except LookupError:
1310
 
            pass
1311
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1312
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1313
 
        Client.__del__(self, *args, **kwargs)
1314
 
    
1315
 
    def checker_callback(self, pid, condition, command,
1316
 
                         *args, **kwargs):
1317
 
        self.checker_callback_tag = None
1318
 
        self.checker = None
1319
 
        if os.WIFEXITED(condition):
1320
 
            exitstatus = os.WEXITSTATUS(condition)
1321
 
            # Emit D-Bus signal
1322
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1323
 
                                  dbus.Int64(condition),
1324
 
                                  dbus.String(command))
1325
 
        else:
1326
 
            # Emit D-Bus signal
1327
 
            self.CheckerCompleted(dbus.Int16(-1),
1328
 
                                  dbus.Int64(condition),
1329
 
                                  dbus.String(command))
1330
 
        
1331
 
        return Client.checker_callback(self, pid, condition, command,
1332
 
                                       *args, **kwargs)
1333
 
    
1334
 
    def start_checker(self, *args, **kwargs):
1335
 
        old_checker_pid = getattr(self.checker, "pid", None)
1336
 
        r = Client.start_checker(self, *args, **kwargs)
1337
 
        # Only if new checker process was started
1338
 
        if (self.checker is not None
1339
 
            and old_checker_pid != self.checker.pid):
1340
 
            # Emit D-Bus signal
1341
 
            self.CheckerStarted(self.current_checker_command)
1342
 
        return r
1343
 
    
1344
 
    def _reset_approved(self):
1345
 
        self.approved = None
1346
 
        return False
1347
 
    
1348
 
    def approve(self, value=True):
1349
 
        self.approved = value
1350
 
        gobject.timeout_add(int(self.approval_duration.total_seconds()
1351
 
                                * 1000), self._reset_approved)
1352
 
        self.send_changedstate()
1353
 
    
1354
 
    ## D-Bus methods, signals & properties
1355
 
    _interface = "se.recompile.Mandos.Client"
1356
 
    
1357
 
    ## Interfaces
1358
 
    
1359
 
    @dbus_interface_annotations(_interface)
1360
 
    def _foo(self):
1361
 
        return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1362
 
                     "false"}
1363
 
    
1364
 
    ## Signals
1365
 
    
1366
 
    # CheckerCompleted - signal
1367
 
    @dbus.service.signal(_interface, signature="nxs")
1368
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1369
 
        "D-Bus signal"
1370
 
        pass
1371
 
    
1372
 
    # CheckerStarted - signal
1373
 
    @dbus.service.signal(_interface, signature="s")
1374
 
    def CheckerStarted(self, command):
1375
 
        "D-Bus signal"
1376
 
        pass
1377
 
    
1378
 
    # PropertyChanged - signal
1379
 
    @dbus.service.signal(_interface, signature="sv")
1380
 
    def PropertyChanged(self, property, value):
1381
 
        "D-Bus signal"
1382
 
        pass
1383
 
    
1384
 
    # GotSecret - signal
1385
 
    @dbus.service.signal(_interface)
1386
 
    def GotSecret(self):
1387
 
        """D-Bus signal
1388
 
        Is sent after a successful transfer of secret from the Mandos
1389
 
        server to mandos-client
1390
 
        """
1391
 
        pass
1392
 
    
1393
 
    # Rejected - signal
1394
 
    @dbus.service.signal(_interface, signature="s")
1395
 
    def Rejected(self, reason):
1396
 
        "D-Bus signal"
1397
 
        pass
1398
 
    
1399
 
    # NeedApproval - signal
1400
 
    @dbus.service.signal(_interface, signature="tb")
1401
 
    def NeedApproval(self, timeout, default):
1402
 
        "D-Bus signal"
1403
 
        return self.need_approval()
1404
 
    
1405
 
    ## Methods
1406
 
    
1407
 
    # Approve - method
1408
 
    @dbus.service.method(_interface, in_signature="b")
1409
 
    def Approve(self, value):
1410
 
        self.approve(value)
1411
 
    
1412
 
    # CheckedOK - method
1413
 
    @dbus.service.method(_interface)
1414
 
    def CheckedOK(self):
1415
 
        self.checked_ok()
1416
 
    
1417
 
    # Enable - method
1418
 
    @dbus.service.method(_interface)
1419
 
    def Enable(self):
1420
 
        "D-Bus method"
1421
 
        self.enable()
1422
 
    
1423
 
    # StartChecker - method
1424
 
    @dbus.service.method(_interface)
1425
 
    def StartChecker(self):
1426
 
        "D-Bus method"
1427
 
        self.start_checker()
1428
 
    
1429
 
    # Disable - method
1430
 
    @dbus.service.method(_interface)
1431
 
    def Disable(self):
1432
 
        "D-Bus method"
1433
 
        self.disable()
1434
 
    
1435
 
    # StopChecker - method
1436
 
    @dbus.service.method(_interface)
1437
 
    def StopChecker(self):
1438
 
        self.stop_checker()
1439
 
    
1440
 
    ## Properties
1441
 
    
1442
 
    # ApprovalPending - property
1443
 
    @dbus_service_property(_interface, signature="b", access="read")
1444
 
    def ApprovalPending_dbus_property(self):
1445
 
        return dbus.Boolean(bool(self.approvals_pending))
1446
 
    
1447
 
    # ApprovedByDefault - property
1448
 
    @dbus_service_property(_interface, signature="b",
1449
 
                           access="readwrite")
1450
 
    def ApprovedByDefault_dbus_property(self, value=None):
1451
 
        if value is None:       # get
1452
 
            return dbus.Boolean(self.approved_by_default)
1453
 
        self.approved_by_default = bool(value)
1454
 
    
1455
 
    # ApprovalDelay - property
1456
 
    @dbus_service_property(_interface, signature="t",
1457
 
                           access="readwrite")
1458
 
    def ApprovalDelay_dbus_property(self, value=None):
1459
 
        if value is None:       # get
1460
 
            return dbus.UInt64(self.approval_delay.total_seconds()
1461
 
                               * 1000)
1462
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1463
 
    
1464
 
    # ApprovalDuration - property
1465
 
    @dbus_service_property(_interface, signature="t",
1466
 
                           access="readwrite")
1467
 
    def ApprovalDuration_dbus_property(self, value=None):
1468
 
        if value is None:       # get
1469
 
            return dbus.UInt64(self.approval_duration.total_seconds()
1470
 
                               * 1000)
1471
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1472
 
    
1473
 
    # Name - property
1474
 
    @dbus_service_property(_interface, signature="s", access="read")
1475
 
    def Name_dbus_property(self):
1476
 
        return dbus.String(self.name)
1477
 
    
1478
 
    # Fingerprint - property
1479
 
    @dbus_service_property(_interface, signature="s", access="read")
1480
 
    def Fingerprint_dbus_property(self):
1481
 
        return dbus.String(self.fingerprint)
1482
 
    
1483
 
    # Host - property
1484
 
    @dbus_service_property(_interface, signature="s",
1485
 
                           access="readwrite")
1486
 
    def Host_dbus_property(self, value=None):
1487
 
        if value is None:       # get
1488
 
            return dbus.String(self.host)
1489
 
        self.host = str(value)
1490
 
    
1491
 
    # Created - property
1492
 
    @dbus_service_property(_interface, signature="s", access="read")
1493
 
    def Created_dbus_property(self):
1494
 
        return datetime_to_dbus(self.created)
1495
 
    
1496
 
    # LastEnabled - property
1497
 
    @dbus_service_property(_interface, signature="s", access="read")
1498
 
    def LastEnabled_dbus_property(self):
1499
 
        return datetime_to_dbus(self.last_enabled)
1500
 
    
1501
 
    # Enabled - property
1502
 
    @dbus_service_property(_interface, signature="b",
1503
 
                           access="readwrite")
1504
 
    def Enabled_dbus_property(self, value=None):
1505
 
        if value is None:       # get
1506
 
            return dbus.Boolean(self.enabled)
1507
 
        if value:
1508
 
            self.enable()
1509
 
        else:
1510
 
            self.disable()
1511
 
    
1512
 
    # LastCheckedOK - property
1513
 
    @dbus_service_property(_interface, signature="s",
1514
 
                           access="readwrite")
1515
 
    def LastCheckedOK_dbus_property(self, value=None):
1516
 
        if value is not None:
1517
 
            self.checked_ok()
1518
 
            return
1519
 
        return datetime_to_dbus(self.last_checked_ok)
1520
 
    
1521
 
    # LastCheckerStatus - property
1522
 
    @dbus_service_property(_interface, signature="n",
1523
 
                           access="read")
1524
 
    def LastCheckerStatus_dbus_property(self):
1525
 
        return dbus.Int16(self.last_checker_status)
1526
 
    
1527
 
    # Expires - property
1528
 
    @dbus_service_property(_interface, signature="s", access="read")
1529
 
    def Expires_dbus_property(self):
1530
 
        return datetime_to_dbus(self.expires)
1531
 
    
1532
 
    # LastApprovalRequest - property
1533
 
    @dbus_service_property(_interface, signature="s", access="read")
1534
 
    def LastApprovalRequest_dbus_property(self):
1535
 
        return datetime_to_dbus(self.last_approval_request)
1536
 
    
1537
 
    # Timeout - property
1538
 
    @dbus_service_property(_interface, signature="t",
1539
 
                           access="readwrite")
1540
 
    def Timeout_dbus_property(self, value=None):
1541
 
        if value is None:       # get
1542
 
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
1543
 
        old_timeout = self.timeout
1544
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1545
 
        # Reschedule disabling
1546
 
        if self.enabled:
1547
 
            now = datetime.datetime.utcnow()
1548
 
            self.expires += self.timeout - old_timeout
1549
 
            if self.expires <= now:
1550
 
                # The timeout has passed
1551
 
                self.disable()
1552
 
            else:
1553
 
                if (getattr(self, "disable_initiator_tag", None)
1554
 
                    is None):
1555
 
                    return
1556
 
                gobject.source_remove(self.disable_initiator_tag)
1557
 
                self.disable_initiator_tag = (
1558
 
                    gobject.timeout_add(
1559
 
                        int((self.expires - now).total_seconds()
1560
 
                            * 1000), self.disable))
1561
 
    
1562
 
    # ExtendedTimeout - property
1563
 
    @dbus_service_property(_interface, signature="t",
1564
 
                           access="readwrite")
1565
 
    def ExtendedTimeout_dbus_property(self, value=None):
1566
 
        if value is None:       # get
1567
 
            return dbus.UInt64(self.extended_timeout.total_seconds()
1568
 
                               * 1000)
1569
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1570
 
    
1571
 
    # Interval - property
1572
 
    @dbus_service_property(_interface, signature="t",
1573
 
                           access="readwrite")
1574
 
    def Interval_dbus_property(self, value=None):
1575
 
        if value is None:       # get
1576
 
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1577
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1578
 
        if getattr(self, "checker_initiator_tag", None) is None:
1579
 
            return
1580
 
        if self.enabled:
1581
 
            # Reschedule checker run
1582
 
            gobject.source_remove(self.checker_initiator_tag)
1583
 
            self.checker_initiator_tag = (gobject.timeout_add
1584
 
                                          (value, self.start_checker))
1585
 
            self.start_checker()    # Start one now, too
1586
 
    
1587
 
    # Checker - property
1588
 
    @dbus_service_property(_interface, signature="s",
1589
 
                           access="readwrite")
1590
 
    def Checker_dbus_property(self, value=None):
1591
 
        if value is None:       # get
1592
 
            return dbus.String(self.checker_command)
1593
 
        self.checker_command = str(value)
1594
 
    
1595
 
    # CheckerRunning - property
1596
 
    @dbus_service_property(_interface, signature="b",
1597
 
                           access="readwrite")
1598
 
    def CheckerRunning_dbus_property(self, value=None):
1599
 
        if value is None:       # get
1600
 
            return dbus.Boolean(self.checker is not None)
1601
 
        if value:
1602
 
            self.start_checker()
1603
 
        else:
1604
 
            self.stop_checker()
1605
 
    
1606
 
    # ObjectPath - property
1607
 
    @dbus_service_property(_interface, signature="o", access="read")
1608
 
    def ObjectPath_dbus_property(self):
1609
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1610
 
    
1611
 
    # Secret = property
1612
 
    @dbus_service_property(_interface, signature="ay",
1613
 
                           access="write", byte_arrays=True)
1614
 
    def Secret_dbus_property(self, value):
1615
 
        self.secret = bytes(value)
1616
 
    
1617
 
    del _interface
1618
 
 
1619
 
 
1620
 
class ProxyClient(object):
1621
 
    def __init__(self, child_pipe, fpr, address):
1622
 
        self._pipe = child_pipe
1623
 
        self._pipe.send(('init', fpr, address))
1624
 
        if not self._pipe.recv():
1625
 
            raise KeyError()
1626
 
    
1627
 
    def __getattribute__(self, name):
1628
 
        if name == '_pipe':
1629
 
            return super(ProxyClient, self).__getattribute__(name)
1630
 
        self._pipe.send(('getattr', name))
1631
 
        data = self._pipe.recv()
1632
 
        if data[0] == 'data':
1633
 
            return data[1]
1634
 
        if data[0] == 'function':
1635
 
            def func(*args, **kwargs):
1636
 
                self._pipe.send(('funcall', name, args, kwargs))
1637
 
                return self._pipe.recv()[1]
1638
 
            return func
1639
 
    
1640
 
    def __setattr__(self, name, value):
1641
 
        if name == '_pipe':
1642
 
            return super(ProxyClient, self).__setattr__(name, value)
1643
 
        self._pipe.send(('setattr', name, value))
1644
 
 
1645
 
 
1646
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1647
 
    """A class to handle client connections.
1648
 
    
1649
 
    Instantiated once for each connection to handle it.
 
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.
1650
442
    Note: This will run in its own forked process."""
1651
443
    
1652
444
    def handle(self):
1653
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1654
 
            logger.info("TCP connection from: %s",
1655
 
                        str(self.client_address))
1656
 
            logger.debug("Pipe FD: %d",
1657
 
                         self.server.child_pipe.fileno())
1658
 
            
1659
 
            session = (gnutls.connection
1660
 
                       .ClientSession(self.request,
1661
 
                                      gnutls.connection
1662
 
                                      .X509Credentials()))
1663
 
            
1664
 
            # Note: gnutls.connection.X509Credentials is really a
1665
 
            # generic GnuTLS certificate credentials object so long as
1666
 
            # no X.509 keys are added to it.  Therefore, we can use it
1667
 
            # here despite using OpenPGP certificates.
1668
 
            
1669
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1670
 
            #                      "+AES-256-CBC", "+SHA1",
1671
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1672
 
            #                      "+DHE-DSS"))
1673
 
            # Use a fallback default, since this MUST be set.
1674
 
            priority = self.server.gnutls_priority
1675
 
            if priority is None:
1676
 
                priority = "NORMAL"
1677
 
            (gnutls.library.functions
1678
 
             .gnutls_priority_set_direct(session._c_object,
1679
 
                                         priority, None))
1680
 
            
1681
 
            # Start communication using the Mandos protocol
1682
 
            # Get protocol number
1683
 
            line = self.request.makefile().readline()
1684
 
            logger.debug("Protocol version: %r", line)
1685
 
            try:
1686
 
                if int(line.strip().split()[0]) > 1:
1687
 
                    raise RuntimeError(line)
1688
 
            except (ValueError, IndexError, RuntimeError) as error:
1689
 
                logger.error("Unknown protocol version: %s", error)
1690
 
                return
1691
 
            
1692
 
            # Start GnuTLS connection
1693
 
            try:
1694
 
                session.handshake()
1695
 
            except gnutls.errors.GNUTLSError as error:
1696
 
                logger.warning("Handshake failed: %s", error)
1697
 
                # Do not run session.bye() here: the session is not
1698
 
                # established.  Just abandon the request.
1699
 
                return
1700
 
            logger.debug("Handshake succeeded")
1701
 
            
1702
 
            approval_required = False
1703
 
            try:
1704
 
                try:
1705
 
                    fpr = self.fingerprint(self.peer_certificate
1706
 
                                           (session))
1707
 
                except (TypeError,
1708
 
                        gnutls.errors.GNUTLSError) as error:
1709
 
                    logger.warning("Bad certificate: %s", error)
1710
 
                    return
1711
 
                logger.debug("Fingerprint: %s", fpr)
1712
 
                
1713
 
                try:
1714
 
                    client = ProxyClient(child_pipe, fpr,
1715
 
                                         self.client_address)
1716
 
                except KeyError:
1717
 
                    return
1718
 
                
1719
 
                if client.approval_delay:
1720
 
                    delay = client.approval_delay
1721
 
                    client.approvals_pending += 1
1722
 
                    approval_required = True
1723
 
                
1724
 
                while True:
1725
 
                    if not client.enabled:
1726
 
                        logger.info("Client %s is disabled",
1727
 
                                       client.name)
1728
 
                        if self.server.use_dbus:
1729
 
                            # Emit D-Bus signal
1730
 
                            client.Rejected("Disabled")
1731
 
                        return
1732
 
                    
1733
 
                    if client.approved or not client.approval_delay:
1734
 
                        #We are approved or approval is disabled
1735
 
                        break
1736
 
                    elif client.approved is None:
1737
 
                        logger.info("Client %s needs approval",
1738
 
                                    client.name)
1739
 
                        if self.server.use_dbus:
1740
 
                            # Emit D-Bus signal
1741
 
                            client.NeedApproval(
1742
 
                                client.approval_delay.total_seconds()
1743
 
                                * 1000, client.approved_by_default)
1744
 
                    else:
1745
 
                        logger.warning("Client %s was not approved",
1746
 
                                       client.name)
1747
 
                        if self.server.use_dbus:
1748
 
                            # Emit D-Bus signal
1749
 
                            client.Rejected("Denied")
1750
 
                        return
1751
 
                    
1752
 
                    #wait until timeout or approved
1753
 
                    time = datetime.datetime.now()
1754
 
                    client.changedstate.acquire()
1755
 
                    client.changedstate.wait(delay.total_seconds())
1756
 
                    client.changedstate.release()
1757
 
                    time2 = datetime.datetime.now()
1758
 
                    if (time2 - time) >= delay:
1759
 
                        if not client.approved_by_default:
1760
 
                            logger.warning("Client %s timed out while"
1761
 
                                           " waiting for approval",
1762
 
                                           client.name)
1763
 
                            if self.server.use_dbus:
1764
 
                                # Emit D-Bus signal
1765
 
                                client.Rejected("Approval timed out")
1766
 
                            return
1767
 
                        else:
1768
 
                            break
1769
 
                    else:
1770
 
                        delay -= time2 - time
1771
 
                
1772
 
                sent_size = 0
1773
 
                while sent_size < len(client.secret):
1774
 
                    try:
1775
 
                        sent = session.send(client.secret[sent_size:])
1776
 
                    except gnutls.errors.GNUTLSError as error:
1777
 
                        logger.warning("gnutls send failed",
1778
 
                                       exc_info=error)
1779
 
                        return
1780
 
                    logger.debug("Sent: %d, remaining: %d",
1781
 
                                 sent, len(client.secret)
1782
 
                                 - (sent_size + sent))
1783
 
                    sent_size += sent
1784
 
                
1785
 
                logger.info("Sending secret to %s", client.name)
1786
 
                # bump the timeout using extended_timeout
1787
 
                client.bump_timeout(client.extended_timeout)
1788
 
                if self.server.use_dbus:
1789
 
                    # Emit D-Bus signal
1790
 
                    client.GotSecret()
1791
 
            
1792
 
            finally:
1793
 
                if approval_required:
1794
 
                    client.approvals_pending -= 1
1795
 
                try:
1796
 
                    session.bye()
1797
 
                except gnutls.errors.GNUTLSError as error:
1798
 
                    logger.warning("GnuTLS bye failed",
1799
 
                                   exc_info=error)
1800
 
    
1801
 
    @staticmethod
1802
 
    def peer_certificate(session):
1803
 
        "Return the peer's OpenPGP certificate as a bytestring"
1804
 
        # If not an OpenPGP certificate...
1805
 
        if (gnutls.library.functions
1806
 
            .gnutls_certificate_type_get(session._c_object)
1807
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1808
 
            # ...do the normal thing
1809
 
            return session.peer_certificate
1810
 
        list_size = ctypes.c_uint(1)
1811
 
        cert_list = (gnutls.library.functions
1812
 
                     .gnutls_certificate_get_peers
1813
 
                     (session._c_object, ctypes.byref(list_size)))
1814
 
        if not bool(cert_list) and list_size.value != 0:
1815
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1816
 
                                            " certificate")
1817
 
        if list_size.value == 0:
1818
 
            return None
1819
 
        cert = cert_list[0]
1820
 
        return ctypes.string_at(cert.data, cert.size)
1821
 
    
1822
 
    @staticmethod
1823
 
    def fingerprint(openpgp):
1824
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1825
 
        # New GnuTLS "datum" with the OpenPGP public key
1826
 
        datum = (gnutls.library.types
1827
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1828
 
                                             ctypes.POINTER
1829
 
                                             (ctypes.c_ubyte)),
1830
 
                                 ctypes.c_uint(len(openpgp))))
1831
 
        # New empty GnuTLS certificate
1832
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1833
 
        (gnutls.library.functions
1834
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1835
 
        # Import the OpenPGP public key into the certificate
1836
 
        (gnutls.library.functions
1837
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1838
 
                                    gnutls.library.constants
1839
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1840
 
        # Verify the self signature in the key
1841
 
        crtverify = ctypes.c_uint()
1842
 
        (gnutls.library.functions
1843
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1844
 
                                         ctypes.byref(crtverify)))
1845
 
        if crtverify.value != 0:
1846
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1847
 
            raise (gnutls.errors.CertificateSecurityError
1848
 
                   ("Verify failed"))
1849
 
        # New buffer for the fingerprint
1850
 
        buf = ctypes.create_string_buffer(20)
1851
 
        buf_len = ctypes.c_size_t()
1852
 
        # Get the fingerprint from the certificate into the buffer
1853
 
        (gnutls.library.functions
1854
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1855
 
                                             ctypes.byref(buf_len)))
1856
 
        # Deinit the certificate
1857
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1858
 
        # Convert the buffer to a Python bytestring
1859
 
        fpr = ctypes.string_at(buf, buf_len.value)
1860
 
        # Convert the bytestring to hexadecimal notation
1861
 
        hex_fpr = binascii.hexlify(fpr).upper()
1862
 
        return hex_fpr
1863
 
 
1864
 
 
1865
 
class MultiprocessingMixIn(object):
1866
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1867
 
    def sub_process_main(self, request, address):
1868
 
        try:
1869
 
            self.finish_request(request, address)
1870
 
        except Exception:
1871
 
            self.handle_error(request, address)
1872
 
        self.close_request(request)
1873
 
    
1874
 
    def process_request(self, request, address):
1875
 
        """Start a new process to process the request."""
1876
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1877
 
                                       args = (request, address))
1878
 
        proc.start()
1879
 
        return proc
1880
 
 
1881
 
 
1882
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1883
 
    """ adds a pipe to the MixIn """
1884
 
    def process_request(self, request, client_address):
1885
 
        """Overrides and wraps the original process_request().
1886
 
        
1887
 
        This function creates a new pipe in self.pipe
1888
 
        """
1889
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1890
 
        
1891
 
        proc = MultiprocessingMixIn.process_request(self, request,
1892
 
                                                    client_address)
1893
 
        self.child_pipe.close()
1894
 
        self.add_pipe(parent_pipe, proc)
1895
 
    
1896
 
    def add_pipe(self, parent_pipe, proc):
1897
 
        """Dummy function; override as necessary"""
1898
 
        raise NotImplementedError()
1899
 
 
1900
 
 
1901
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1902
 
                     socketserver.TCPServer, object):
1903
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1904
 
    
 
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.
1905
518
    Attributes:
 
519
        settings:       Server settings
 
520
        clients:        Set() of Client objects
1906
521
        enabled:        Boolean; whether this server is activated yet
1907
 
        interface:      None or a network interface name (string)
1908
 
        use_ipv6:       Boolean; to use IPv6 or not
1909
522
    """
1910
 
    def __init__(self, server_address, RequestHandlerClass,
1911
 
                 interface=None, use_ipv6=True, socketfd=None):
1912
 
        """If socketfd is set, use that file descriptor instead of
1913
 
        creating a new one with socket.socket().
1914
 
        """
1915
 
        self.interface = interface
1916
 
        if use_ipv6:
1917
 
            self.address_family = socket.AF_INET6
1918
 
        if socketfd is not None:
1919
 
            # Save the file descriptor
1920
 
            self.socketfd = socketfd
1921
 
            # Save the original socket.socket() function
1922
 
            self.socket_socket = socket.socket
1923
 
            # To implement --socket, we monkey patch socket.socket.
1924
 
            # 
1925
 
            # (When socketserver.TCPServer is a new-style class, we
1926
 
            # could make self.socket into a property instead of monkey
1927
 
            # patching socket.socket.)
1928
 
            # 
1929
 
            # Create a one-time-only replacement for socket.socket()
1930
 
            @functools.wraps(socket.socket)
1931
 
            def socket_wrapper(*args, **kwargs):
1932
 
                # Restore original function so subsequent calls are
1933
 
                # not affected.
1934
 
                socket.socket = self.socket_socket
1935
 
                del self.socket_socket
1936
 
                # This time only, return a new socket object from the
1937
 
                # saved file descriptor.
1938
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1939
 
            # Replace socket.socket() function with wrapper
1940
 
            socket.socket = socket_wrapper
1941
 
        # The socketserver.TCPServer.__init__ will call
1942
 
        # socket.socket(), which might be our replacement,
1943
 
        # socket_wrapper(), if socketfd was set.
1944
 
        socketserver.TCPServer.__init__(self, server_address,
1945
 
                                        RequestHandlerClass)
1946
 
    
 
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)
1947
533
    def server_bind(self):
1948
534
        """This overrides the normal server_bind() function
1949
535
        to bind to an interface if one was specified, and also NOT to
1950
536
        bind to an address or port if they were not specified."""
1951
 
        if self.interface is not None:
1952
 
            if SO_BINDTODEVICE is None:
1953
 
                logger.error("SO_BINDTODEVICE does not exist;"
1954
 
                             " cannot bind to interface %s",
1955
 
                             self.interface)
1956
 
            else:
1957
 
                try:
1958
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1959
 
                                           SO_BINDTODEVICE,
1960
 
                                           (self.interface + "\0")
1961
 
                                           .encode("utf-8"))
1962
 
                except socket.error as error:
1963
 
                    if error.errno == errno.EPERM:
1964
 
                        logger.error("No permission to bind to"
1965
 
                                     " interface %s", self.interface)
1966
 
                    elif error.errno == errno.ENOPROTOOPT:
1967
 
                        logger.error("SO_BINDTODEVICE not available;"
1968
 
                                     " cannot bind to interface %s",
1969
 
                                     self.interface)
1970
 
                    elif error.errno == errno.ENODEV:
1971
 
                        logger.error("Interface %s does not exist,"
1972
 
                                     " cannot bind", self.interface)
1973
 
                    else:
1974
 
                        raise
 
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
1975
551
        # Only bind(2) the socket if we really need to.
1976
552
        if self.server_address[0] or self.server_address[1]:
1977
553
            if not self.server_address[0]:
1978
 
                if self.address_family == socket.AF_INET6:
1979
 
                    any_address = "::" # in6addr_any
1980
 
                else:
1981
 
                    any_address = "0.0.0.0" # INADDR_ANY
1982
 
                self.server_address = (any_address,
 
554
                in6addr_any = "::"
 
555
                self.server_address = (in6addr_any,
1983
556
                                       self.server_address[1])
1984
557
            elif not self.server_address[1]:
1985
558
                self.server_address = (self.server_address[0],
1986
559
                                       0)
1987
 
#                 if self.interface:
 
560
#                 if self.settings["interface"]:
1988
561
#                     self.server_address = (self.server_address[0],
1989
562
#                                            0, # port
1990
563
#                                            0, # flowinfo
1991
564
#                                            if_nametoindex
1992
 
#                                            (self.interface))
1993
 
            return socketserver.TCPServer.server_bind(self)
1994
 
 
1995
 
 
1996
 
class MandosServer(IPv6_TCPServer):
1997
 
    """Mandos server.
1998
 
    
1999
 
    Attributes:
2000
 
        clients:        set of Client objects
2001
 
        gnutls_priority GnuTLS priority string
2002
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2003
 
    
2004
 
    Assumes a gobject.MainLoop event loop.
2005
 
    """
2006
 
    def __init__(self, server_address, RequestHandlerClass,
2007
 
                 interface=None, use_ipv6=True, clients=None,
2008
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
2009
 
        self.enabled = False
2010
 
        self.clients = clients
2011
 
        if self.clients is None:
2012
 
            self.clients = {}
2013
 
        self.use_dbus = use_dbus
2014
 
        self.gnutls_priority = gnutls_priority
2015
 
        IPv6_TCPServer.__init__(self, server_address,
2016
 
                                RequestHandlerClass,
2017
 
                                interface = interface,
2018
 
                                use_ipv6 = use_ipv6,
2019
 
                                socketfd = socketfd)
 
565
#                                            (self.settings
 
566
#                                             ["interface"]))
 
567
            return super(type(self), self).server_bind()
2020
568
    def server_activate(self):
2021
569
        if self.enabled:
2022
 
            return socketserver.TCPServer.server_activate(self)
2023
 
    
 
570
            return super(type(self), self).server_activate()
2024
571
    def enable(self):
2025
572
        self.enabled = True
2026
 
    
2027
 
    def add_pipe(self, parent_pipe, proc):
2028
 
        # Call "handle_ipc" for both data and EOF events
2029
 
        gobject.io_add_watch(parent_pipe.fileno(),
2030
 
                             gobject.IO_IN | gobject.IO_HUP,
2031
 
                             functools.partial(self.handle_ipc,
2032
 
                                               parent_pipe =
2033
 
                                               parent_pipe,
2034
 
                                               proc = proc))
2035
 
    
2036
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2037
 
                   proc = None, client_object=None):
2038
 
        # error, or the other end of multiprocessing.Pipe has closed
2039
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2040
 
            # Wait for other process to exit
2041
 
            proc.join()
2042
 
            return False
2043
 
        
2044
 
        # Read a request from the child
2045
 
        request = parent_pipe.recv()
2046
 
        command = request[0]
2047
 
        
2048
 
        if command == 'init':
2049
 
            fpr = request[1]
2050
 
            address = request[2]
2051
 
            
2052
 
            for c in self.clients.itervalues():
2053
 
                if c.fingerprint == fpr:
2054
 
                    client = c
2055
 
                    break
2056
 
            else:
2057
 
                logger.info("Client not found for fingerprint: %s, ad"
2058
 
                            "dress: %s", fpr, address)
2059
 
                if self.use_dbus:
2060
 
                    # Emit D-Bus signal
2061
 
                    mandos_dbus_service.ClientNotFound(fpr,
2062
 
                                                       address[0])
2063
 
                parent_pipe.send(False)
2064
 
                return False
2065
 
            
2066
 
            gobject.io_add_watch(parent_pipe.fileno(),
2067
 
                                 gobject.IO_IN | gobject.IO_HUP,
2068
 
                                 functools.partial(self.handle_ipc,
2069
 
                                                   parent_pipe =
2070
 
                                                   parent_pipe,
2071
 
                                                   proc = proc,
2072
 
                                                   client_object =
2073
 
                                                   client))
2074
 
            parent_pipe.send(True)
2075
 
            # remove the old hook in favor of the new above hook on
2076
 
            # same fileno
2077
 
            return False
2078
 
        if command == 'funcall':
2079
 
            funcname = request[1]
2080
 
            args = request[2]
2081
 
            kwargs = request[3]
2082
 
            
2083
 
            parent_pipe.send(('data', getattr(client_object,
2084
 
                                              funcname)(*args,
2085
 
                                                         **kwargs)))
2086
 
        
2087
 
        if command == 'getattr':
2088
 
            attrname = request[1]
2089
 
            if callable(client_object.__getattribute__(attrname)):
2090
 
                parent_pipe.send(('function',))
2091
 
            else:
2092
 
                parent_pipe.send(('data', client_object
2093
 
                                  .__getattribute__(attrname)))
2094
 
        
2095
 
        if command == 'setattr':
2096
 
            attrname = request[1]
2097
 
            value = request[2]
2098
 
            setattr(client_object, attrname, value)
2099
 
        
2100
 
        return True
2101
 
 
2102
 
 
2103
 
def rfc3339_duration_to_delta(duration):
2104
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2105
 
    
2106
 
    >>> rfc3339_duration_to_delta("P7D")
2107
 
    datetime.timedelta(7)
2108
 
    >>> rfc3339_duration_to_delta("PT60S")
2109
 
    datetime.timedelta(0, 60)
2110
 
    >>> rfc3339_duration_to_delta("PT60M")
2111
 
    datetime.timedelta(0, 3600)
2112
 
    >>> rfc3339_duration_to_delta("PT24H")
2113
 
    datetime.timedelta(1)
2114
 
    >>> rfc3339_duration_to_delta("P1W")
2115
 
    datetime.timedelta(7)
2116
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2117
 
    datetime.timedelta(0, 330)
2118
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2119
 
    datetime.timedelta(1, 200)
2120
 
    """
2121
 
    
2122
 
    # Parsing an RFC 3339 duration with regular expressions is not
2123
 
    # possible - there would have to be multiple places for the same
2124
 
    # values, like seconds.  The current code, while more esoteric, is
2125
 
    # cleaner without depending on a parsing library.  If Python had a
2126
 
    # built-in library for parsing we would use it, but we'd like to
2127
 
    # avoid excessive use of external libraries.
2128
 
    
2129
 
    # New type for defining tokens, syntax, and semantics all-in-one
2130
 
    Token = collections.namedtuple("Token",
2131
 
                                   ("regexp", # To match token; if
2132
 
                                              # "value" is not None,
2133
 
                                              # must have a "group"
2134
 
                                              # containing digits
2135
 
                                    "value",  # datetime.timedelta or
2136
 
                                              # None
2137
 
                                    "followers")) # Tokens valid after
2138
 
                                                  # this token
2139
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2140
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2141
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2142
 
    token_second = Token(re.compile(r"(\d+)S"),
2143
 
                         datetime.timedelta(seconds=1),
2144
 
                         frozenset((token_end,)))
2145
 
    token_minute = Token(re.compile(r"(\d+)M"),
2146
 
                         datetime.timedelta(minutes=1),
2147
 
                         frozenset((token_second, token_end)))
2148
 
    token_hour = Token(re.compile(r"(\d+)H"),
2149
 
                       datetime.timedelta(hours=1),
2150
 
                       frozenset((token_minute, token_end)))
2151
 
    token_time = Token(re.compile(r"T"),
2152
 
                       None,
2153
 
                       frozenset((token_hour, token_minute,
2154
 
                                  token_second)))
2155
 
    token_day = Token(re.compile(r"(\d+)D"),
2156
 
                      datetime.timedelta(days=1),
2157
 
                      frozenset((token_time, token_end)))
2158
 
    token_month = Token(re.compile(r"(\d+)M"),
2159
 
                        datetime.timedelta(weeks=4),
2160
 
                        frozenset((token_day, token_end)))
2161
 
    token_year = Token(re.compile(r"(\d+)Y"),
2162
 
                       datetime.timedelta(weeks=52),
2163
 
                       frozenset((token_month, token_end)))
2164
 
    token_week = Token(re.compile(r"(\d+)W"),
2165
 
                       datetime.timedelta(weeks=1),
2166
 
                       frozenset((token_end,)))
2167
 
    token_duration = Token(re.compile(r"P"), None,
2168
 
                           frozenset((token_year, token_month,
2169
 
                                      token_day, token_time,
2170
 
                                      token_week)))
2171
 
    # Define starting values
2172
 
    value = datetime.timedelta() # Value so far
2173
 
    found_token = None
2174
 
    followers = frozenset((token_duration,)) # Following valid tokens
2175
 
    s = duration                # String left to parse
2176
 
    # Loop until end token is found
2177
 
    while found_token is not token_end:
2178
 
        # Search for any currently valid tokens
2179
 
        for token in followers:
2180
 
            match = token.regexp.match(s)
2181
 
            if match is not None:
2182
 
                # Token found
2183
 
                if token.value is not None:
2184
 
                    # Value found, parse digits
2185
 
                    factor = int(match.group(1), 10)
2186
 
                    # Add to value so far
2187
 
                    value += factor * token.value
2188
 
                # Strip token from string
2189
 
                s = token.regexp.sub("", s, 1)
2190
 
                # Go to found token
2191
 
                found_token = token
2192
 
                # Set valid next tokens
2193
 
                followers = found_token.followers
2194
 
                break
2195
 
        else:
2196
 
            # No currently valid tokens were found
2197
 
            raise ValueError("Invalid RFC 3339 duration")
2198
 
    # End token found
2199
 
    return value
2200
573
 
2201
574
 
2202
575
def string_to_delta(interval):
2203
576
    """Parse a string and return a datetime.timedelta
2204
 
    
 
577
 
2205
578
    >>> string_to_delta('7d')
2206
579
    datetime.timedelta(7)
2207
580
    >>> string_to_delta('60s')
2210
583
    datetime.timedelta(0, 3600)
2211
584
    >>> string_to_delta('24h')
2212
585
    datetime.timedelta(1)
2213
 
    >>> string_to_delta('1w')
 
586
    >>> string_to_delta(u'1w')
2214
587
    datetime.timedelta(7)
2215
588
    >>> string_to_delta('5m 30s')
2216
589
    datetime.timedelta(0, 330)
2217
590
    """
2218
 
    
2219
 
    try:
2220
 
        return rfc3339_duration_to_delta(interval)
2221
 
    except ValueError:
2222
 
        pass
2223
 
    
2224
591
    timevalue = datetime.timedelta(0)
2225
592
    for s in interval.split():
2226
593
        try:
2227
 
            suffix = s[-1]
2228
 
            value = int(s[:-1])
2229
 
            if suffix == "d":
 
594
            suffix=unicode(s[-1])
 
595
            value=int(s[:-1])
 
596
            if suffix == u"d":
2230
597
                delta = datetime.timedelta(value)
2231
 
            elif suffix == "s":
 
598
            elif suffix == u"s":
2232
599
                delta = datetime.timedelta(0, value)
2233
 
            elif suffix == "m":
 
600
            elif suffix == u"m":
2234
601
                delta = datetime.timedelta(0, 0, 0, 0, value)
2235
 
            elif suffix == "h":
 
602
            elif suffix == u"h":
2236
603
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2237
 
            elif suffix == "w":
 
604
            elif suffix == u"w":
2238
605
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2239
606
            else:
2240
 
                raise ValueError("Unknown suffix {!r}"
2241
 
                                 .format(suffix))
2242
 
        except IndexError as e:
2243
 
            raise ValueError(*(e.args))
 
607
                raise ValueError
 
608
        except (ValueError, IndexError):
 
609
            raise ValueError
2244
610
        timevalue += delta
2245
611
    return timevalue
2246
612
 
2247
613
 
 
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
 
2248
662
def daemon(nochdir = False, noclose = False):
2249
663
    """See daemon(3).  Standard BSD Unix function.
2250
 
    
2251
664
    This should really exist as os.daemon, but it doesn't (yet)."""
2252
665
    if os.fork():
2253
666
        sys.exit()
2258
671
        sys.exit()
2259
672
    if not noclose:
2260
673
        # Close all standard open file descriptors
2261
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
674
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2262
675
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2263
 
            raise OSError(errno.ENODEV, "{} not a character device"
2264
 
                          .format(os.devnull))
 
676
            raise OSError(errno.ENODEV,
 
677
                          "/dev/null not a character device")
2265
678
        os.dup2(null, sys.stdin.fileno())
2266
679
        os.dup2(null, sys.stdout.fileno())
2267
680
        os.dup2(null, sys.stderr.fileno())
2270
683
 
2271
684
 
2272
685
def main():
2273
 
    
2274
 
    ##################################################################
2275
 
    # Parsing of options, both command line and config file
2276
 
    
2277
 
    parser = argparse.ArgumentParser()
2278
 
    parser.add_argument("-v", "--version", action="version",
2279
 
                        version = "%(prog)s {}".format(version),
2280
 
                        help="show version number and exit")
2281
 
    parser.add_argument("-i", "--interface", metavar="IF",
2282
 
                        help="Bind to interface IF")
2283
 
    parser.add_argument("-a", "--address",
2284
 
                        help="Address to listen for requests on")
2285
 
    parser.add_argument("-p", "--port", type=int,
2286
 
                        help="Port number to receive requests on")
2287
 
    parser.add_argument("--check", action="store_true",
2288
 
                        help="Run self-test")
2289
 
    parser.add_argument("--debug", action="store_true",
2290
 
                        help="Debug mode; run in foreground and log"
2291
 
                        " to terminal", default=None)
2292
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2293
 
                        help="Debug level for stdout output")
2294
 
    parser.add_argument("--priority", help="GnuTLS"
2295
 
                        " priority string (see GnuTLS documentation)")
2296
 
    parser.add_argument("--servicename",
2297
 
                        metavar="NAME", help="Zeroconf service name")
2298
 
    parser.add_argument("--configdir",
2299
 
                        default="/etc/mandos", metavar="DIR",
2300
 
                        help="Directory to search for configuration"
2301
 
                        " files")
2302
 
    parser.add_argument("--no-dbus", action="store_false",
2303
 
                        dest="use_dbus", help="Do not provide D-Bus"
2304
 
                        " system bus interface", default=None)
2305
 
    parser.add_argument("--no-ipv6", action="store_false",
2306
 
                        dest="use_ipv6", help="Do not use IPv6",
2307
 
                        default=None)
2308
 
    parser.add_argument("--no-restore", action="store_false",
2309
 
                        dest="restore", help="Do not restore stored"
2310
 
                        " state", default=None)
2311
 
    parser.add_argument("--socket", type=int,
2312
 
                        help="Specify a file descriptor to a network"
2313
 
                        " socket to use instead of creating one")
2314
 
    parser.add_argument("--statedir", metavar="DIR",
2315
 
                        help="Directory to save/restore state in")
2316
 
    parser.add_argument("--foreground", action="store_true",
2317
 
                        help="Run in foreground", default=None)
2318
 
    parser.add_argument("--no-zeroconf", action="store_false",
2319
 
                        dest="zeroconf", help="Do not use Zeroconf",
2320
 
                        default=None)
2321
 
    
2322
 
    options = parser.parse_args()
 
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()
2323
710
    
2324
711
    if options.check:
2325
712
        import doctest
2326
 
        fail_count, test_count = doctest.testmod()
2327
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
713
        doctest.testmod()
 
714
        sys.exit()
2328
715
    
2329
716
    # Default values for config file for server-global settings
2330
717
    server_defaults = { "interface": "",
2332
719
                        "port": "",
2333
720
                        "debug": "False",
2334
721
                        "priority":
2335
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
 
722
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2336
723
                        "servicename": "Mandos",
2337
 
                        "use_dbus": "True",
2338
 
                        "use_ipv6": "True",
2339
 
                        "debuglevel": "",
2340
 
                        "restore": "True",
2341
 
                        "socket": "",
2342
 
                        "statedir": "/var/lib/mandos",
2343
 
                        "foreground": "False",
2344
 
                        "zeroconf": "True",
2345
724
                        }
2346
725
    
2347
726
    # Parse config file for server-global settings
2348
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
727
    server_config = ConfigParser.SafeConfigParser(server_defaults)
2349
728
    del server_defaults
2350
 
    server_config.read(os.path.join(options.configdir,
2351
 
                                    "mandos.conf"))
 
729
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2352
730
    # Convert the SafeConfigParser object to a dict
2353
731
    server_settings = server_config.defaults()
2354
 
    # Use the appropriate methods on the non-string config options
2355
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2356
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2357
 
                                                           option)
2358
 
    if server_settings["port"]:
2359
 
        server_settings["port"] = server_config.getint("DEFAULT",
2360
 
                                                       "port")
2361
 
    if server_settings["socket"]:
2362
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2363
 
                                                         "socket")
2364
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2365
 
        # over with an opened os.devnull.  But we don't want this to
2366
 
        # happen with a supplied network socket.
2367
 
        if 0 <= server_settings["socket"] <= 2:
2368
 
            server_settings["socket"] = os.dup(server_settings
2369
 
                                               ["socket"])
 
732
    # Use getboolean on the boolean config option
 
733
    server_settings["debug"] = server_config.getboolean\
 
734
                               ("DEFAULT", "debug")
2370
735
    del server_config
2371
736
    
2372
737
    # Override the settings from the config file with command line
2373
738
    # options, if set.
2374
739
    for option in ("interface", "address", "port", "debug",
2375
 
                   "priority", "servicename", "configdir",
2376
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2377
 
                   "statedir", "socket", "foreground", "zeroconf"):
 
740
                   "priority", "servicename", "configdir"):
2378
741
        value = getattr(options, option)
2379
742
        if value is not None:
2380
743
            server_settings[option] = value
2381
744
    del options
2382
 
    # Force all strings to be unicode
2383
 
    for option in server_settings.keys():
2384
 
        if isinstance(server_settings[option], bytes):
2385
 
            server_settings[option] = (server_settings[option]
2386
 
                                       .decode("utf-8"))
2387
 
    # Force all boolean options to be boolean
2388
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2389
 
                   "foreground", "zeroconf"):
2390
 
        server_settings[option] = bool(server_settings[option])
2391
 
    # Debug implies foreground
2392
 
    if server_settings["debug"]:
2393
 
        server_settings["foreground"] = True
2394
745
    # Now we have our good server settings in "server_settings"
2395
746
    
2396
 
    ##################################################################
2397
 
    
2398
 
    if (not server_settings["zeroconf"] and
2399
 
        not (server_settings["port"]
2400
 
             or server_settings["socket"] != "")):
2401
 
            parser.error("Needs port or socket to work without"
2402
 
                         " Zeroconf")
2403
 
    
2404
 
    # For convenience
2405
747
    debug = server_settings["debug"]
2406
 
    debuglevel = server_settings["debuglevel"]
2407
 
    use_dbus = server_settings["use_dbus"]
2408
 
    use_ipv6 = server_settings["use_ipv6"]
2409
 
    stored_state_path = os.path.join(server_settings["statedir"],
2410
 
                                     stored_state_file)
2411
 
    foreground = server_settings["foreground"]
2412
 
    zeroconf = server_settings["zeroconf"]
2413
748
    
2414
 
    if debug:
2415
 
        initlogger(debug, logging.DEBUG)
2416
 
    else:
2417
 
        if not debuglevel:
2418
 
            initlogger(debug)
2419
 
        else:
2420
 
            level = getattr(logging, debuglevel.upper())
2421
 
            initlogger(debug, level)
 
749
    if not debug:
 
750
        syslogger.setLevel(logging.WARNING)
 
751
        console.setLevel(logging.WARNING)
2422
752
    
2423
753
    if server_settings["servicename"] != "Mandos":
2424
 
        syslogger.setFormatter(logging.Formatter
2425
 
                               ('Mandos ({}) [%(process)d]:'
2426
 
                                ' %(levelname)s: %(message)s'
2427
 
                                .format(server_settings
2428
 
                                        ["servicename"])))
 
754
        syslogger.setFormatter(logging.Formatter\
 
755
                               ('Mandos (%s): %%(levelname)s:'
 
756
                                ' %%(message)s'
 
757
                                % server_settings["servicename"]))
2429
758
    
2430
759
    # Parse config file with clients
2431
 
    client_config = configparser.SafeConfigParser(Client
2432
 
                                                  .client_defaults)
 
760
    client_defaults = { "timeout": "1h",
 
761
                        "interval": "5m",
 
762
                        "checker": "fping -q -- %(host)s",
 
763
                        "host": "",
 
764
                        }
 
765
    client_config = ConfigParser.SafeConfigParser(client_defaults)
2433
766
    client_config.read(os.path.join(server_settings["configdir"],
2434
767
                                    "clients.conf"))
2435
768
    
2436
 
    global mandos_dbus_service
2437
 
    mandos_dbus_service = None
2438
 
    
2439
 
    socketfd = None
2440
 
    if server_settings["socket"] != "":
2441
 
        socketfd = server_settings["socket"]
2442
 
    tcp_server = MandosServer((server_settings["address"],
2443
 
                               server_settings["port"]),
2444
 
                              ClientHandler,
2445
 
                              interface=(server_settings["interface"]
2446
 
                                         or None),
2447
 
                              use_ipv6=use_ipv6,
2448
 
                              gnutls_priority=
2449
 
                              server_settings["priority"],
2450
 
                              use_dbus=use_dbus,
2451
 
                              socketfd=socketfd)
2452
 
    if not foreground:
2453
 
        pidfilename = "/run/mandos.pid"
2454
 
        if not os.path.isdir("/run/."):
2455
 
            pidfilename = "/var/run/mandos.pid"
2456
 
        pidfile = None
2457
 
        try:
2458
 
            pidfile = open(pidfilename, "w")
2459
 
        except IOError as e:
2460
 
            logger.error("Could not open file %r", pidfilename,
2461
 
                         exc_info=e)
2462
 
    
2463
 
    for name in ("_mandos", "mandos", "nobody"):
2464
 
        try:
2465
 
            uid = pwd.getpwnam(name).pw_uid
2466
 
            gid = pwd.getpwnam(name).pw_gid
2467
 
            break
2468
 
        except KeyError:
2469
 
            continue
2470
 
    else:
2471
 
        uid = 65534
2472
 
        gid = 65534
2473
 
    try:
 
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:
 
798
        os.setuid(uid)
2474
799
        os.setgid(gid)
2475
 
        os.setuid(uid)
2476
 
    except OSError as error:
2477
 
        if error.errno != errno.EPERM:
2478
 
            raise
2479
 
    
2480
 
    if debug:
2481
 
        # Enable all possible GnuTLS debugging
2482
 
        
2483
 
        # "Use a log level over 10 to enable all debugging options."
2484
 
        # - GnuTLS manual
2485
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2486
 
        
2487
 
        @gnutls.library.types.gnutls_log_func
2488
 
        def debug_gnutls(level, string):
2489
 
            logger.debug("GnuTLS: %s", string[:-1])
2490
 
        
2491
 
        (gnutls.library.functions
2492
 
         .gnutls_global_set_log_function(debug_gnutls))
2493
 
        
2494
 
        # Redirect stdin so all checkers get /dev/null
2495
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2496
 
        os.dup2(null, sys.stdin.fileno())
2497
 
        if null > 2:
2498
 
            os.close(null)
2499
 
    
2500
 
    # Need to fork before connecting to D-Bus
2501
 
    if not foreground:
2502
 
        # Close all input and output, do double fork, etc.
2503
 
        daemon()
2504
 
    
2505
 
    # multiprocessing will use threads, so before we use gobject we
2506
 
    # need to inform gobject that threads will be used.
2507
 
    gobject.threads_init()
 
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"])
2508
810
    
2509
811
    global main_loop
 
812
    global bus
 
813
    global server
2510
814
    # From the Avahi example code
2511
 
    DBusGMainLoop(set_as_default=True)
 
815
    DBusGMainLoop(set_as_default=True )
2512
816
    main_loop = gobject.MainLoop()
2513
817
    bus = dbus.SystemBus()
 
818
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
819
                                           avahi.DBUS_PATH_SERVER),
 
820
                            avahi.DBUS_INTERFACE_SERVER)
2514
821
    # End of Avahi example code
2515
 
    if use_dbus:
2516
 
        try:
2517
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2518
 
                                            bus, do_not_queue=True)
2519
 
            old_bus_name = (dbus.service.BusName
2520
 
                            ("se.bsnet.fukt.Mandos", bus,
2521
 
                             do_not_queue=True))
2522
 
        except dbus.exceptions.NameExistsException as e:
2523
 
            logger.error("Disabling D-Bus:", exc_info=e)
2524
 
            use_dbus = False
2525
 
            server_settings["use_dbus"] = False
2526
 
            tcp_server.use_dbus = False
2527
 
    if zeroconf:
2528
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2529
 
        service = AvahiServiceToSyslog(name =
2530
 
                                       server_settings["servicename"],
2531
 
                                       servicetype = "_mandos._tcp",
2532
 
                                       protocol = protocol, bus = bus)
2533
 
        if server_settings["interface"]:
2534
 
            service.interface = (if_nametoindex
2535
 
                                 (server_settings["interface"]
2536
 
                                  .encode("utf-8")))
2537
 
    
2538
 
    global multiprocessing_manager
2539
 
    multiprocessing_manager = multiprocessing.Manager()
2540
 
    
2541
 
    client_class = Client
2542
 
    if use_dbus:
2543
 
        client_class = functools.partial(ClientDBus, bus = bus)
2544
 
    
2545
 
    client_settings = Client.config_parser(client_config)
2546
 
    old_client_settings = {}
2547
 
    clients_data = {}
2548
 
    
2549
 
    # This is used to redirect stdout and stderr for checker processes
2550
 
    global wnull
2551
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2552
 
    # Only used if server is running in foreground but not in debug
2553
 
    # mode
2554
 
    if debug or not foreground:
2555
 
        wnull.close()
2556
 
    
2557
 
    # Get client data and settings from last running state.
2558
 
    if server_settings["restore"]:
2559
 
        try:
2560
 
            with open(stored_state_path, "rb") as stored_state:
2561
 
                clients_data, old_client_settings = (pickle.load
2562
 
                                                     (stored_state))
2563
 
            os.remove(stored_state_path)
2564
 
        except IOError as e:
2565
 
            if e.errno == errno.ENOENT:
2566
 
                logger.warning("Could not load persistent state: {}"
2567
 
                                .format(os.strerror(e.errno)))
2568
 
            else:
2569
 
                logger.critical("Could not load persistent state:",
2570
 
                                exc_info=e)
2571
 
                raise
2572
 
        except EOFError as e:
2573
 
            logger.warning("Could not load persistent state: "
2574
 
                           "EOFError:", exc_info=e)
2575
 
    
2576
 
    with PGPEngine() as pgp:
2577
 
        for client_name, client in clients_data.items():
2578
 
            # Skip removed clients
2579
 
            if client_name not in client_settings:
2580
 
                continue
2581
 
            
2582
 
            # Decide which value to use after restoring saved state.
2583
 
            # We have three different values: Old config file,
2584
 
            # new config file, and saved state.
2585
 
            # New config value takes precedence if it differs from old
2586
 
            # config value, otherwise use saved state.
2587
 
            for name, value in client_settings[client_name].items():
2588
 
                try:
2589
 
                    # For each value in new config, check if it
2590
 
                    # differs from the old config value (Except for
2591
 
                    # the "secret" attribute)
2592
 
                    if (name != "secret" and
2593
 
                        value != old_client_settings[client_name]
2594
 
                        [name]):
2595
 
                        client[name] = value
2596
 
                except KeyError:
2597
 
                    pass
2598
 
            
2599
 
            # Clients who has passed its expire date can still be
2600
 
            # enabled if its last checker was successful.  Clients
2601
 
            # whose checker succeeded before we stored its state is
2602
 
            # assumed to have successfully run all checkers during
2603
 
            # downtime.
2604
 
            if client["enabled"]:
2605
 
                if datetime.datetime.utcnow() >= client["expires"]:
2606
 
                    if not client["last_checked_ok"]:
2607
 
                        logger.warning(
2608
 
                            "disabling client {} - Client never "
2609
 
                            "performed a successful checker"
2610
 
                            .format(client_name))
2611
 
                        client["enabled"] = False
2612
 
                    elif client["last_checker_status"] != 0:
2613
 
                        logger.warning(
2614
 
                            "disabling client {} - Client last"
2615
 
                            " checker failed with error code {}"
2616
 
                            .format(client_name,
2617
 
                                    client["last_checker_status"]))
2618
 
                        client["enabled"] = False
2619
 
                    else:
2620
 
                        client["expires"] = (datetime.datetime
2621
 
                                             .utcnow()
2622
 
                                             + client["timeout"])
2623
 
                        logger.debug("Last checker succeeded,"
2624
 
                                     " keeping {} enabled"
2625
 
                                     .format(client_name))
2626
 
            try:
2627
 
                client["secret"] = (
2628
 
                    pgp.decrypt(client["encrypted_secret"],
2629
 
                                client_settings[client_name]
2630
 
                                ["secret"]))
2631
 
            except PGPError:
2632
 
                # If decryption fails, we use secret from new settings
2633
 
                logger.debug("Failed to decrypt {} old secret"
2634
 
                             .format(client_name))
2635
 
                client["secret"] = (
2636
 
                    client_settings[client_name]["secret"])
2637
 
    
2638
 
    # Add/remove clients based on new changes made to config
2639
 
    for client_name in (set(old_client_settings)
2640
 
                        - set(client_settings)):
2641
 
        del clients_data[client_name]
2642
 
    for client_name in (set(client_settings)
2643
 
                        - set(old_client_settings)):
2644
 
        clients_data[client_name] = client_settings[client_name]
2645
 
    
2646
 
    # Create all client objects
2647
 
    for client_name, client in clients_data.items():
2648
 
        tcp_server.clients[client_name] = client_class(
2649
 
            name = client_name, settings = client,
2650
 
            server_settings = server_settings)
2651
 
    
2652
 
    if not tcp_server.clients:
2653
 
        logger.warning("No clients defined")
2654
 
    
2655
 
    if not foreground:
2656
 
        if pidfile is not None:
2657
 
            try:
2658
 
                with pidfile:
2659
 
                    pid = os.getpid()
2660
 
                    pidfile.write("{}\n".format(pid).encode("utf-8"))
2661
 
            except IOError:
2662
 
                logger.error("Could not write to file %r with PID %d",
2663
 
                             pidfilename, pid)
 
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()
2664
854
        del pidfile
2665
 
        del pidfilename
2666
 
    
2667
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2668
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2669
 
    
2670
 
    if use_dbus:
2671
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2672
 
                                        "se.bsnet.fukt.Mandos"})
2673
 
        class MandosDBusService(DBusObjectWithProperties):
2674
 
            """A D-Bus proxy object"""
2675
 
            def __init__(self):
2676
 
                dbus.service.Object.__init__(self, bus, "/")
2677
 
            _interface = "se.recompile.Mandos"
2678
 
            
2679
 
            @dbus_interface_annotations(_interface)
2680
 
            def _foo(self):
2681
 
                return { "org.freedesktop.DBus.Property"
2682
 
                         ".EmitsChangedSignal":
2683
 
                             "false"}
2684
 
            
2685
 
            @dbus.service.signal(_interface, signature="o")
2686
 
            def ClientAdded(self, objpath):
2687
 
                "D-Bus signal"
2688
 
                pass
2689
 
            
2690
 
            @dbus.service.signal(_interface, signature="ss")
2691
 
            def ClientNotFound(self, fingerprint, address):
2692
 
                "D-Bus signal"
2693
 
                pass
2694
 
            
2695
 
            @dbus.service.signal(_interface, signature="os")
2696
 
            def ClientRemoved(self, objpath, name):
2697
 
                "D-Bus signal"
2698
 
                pass
2699
 
            
2700
 
            @dbus.service.method(_interface, out_signature="ao")
2701
 
            def GetAllClients(self):
2702
 
                "D-Bus method"
2703
 
                return dbus.Array(c.dbus_object_path
2704
 
                                  for c in
2705
 
                                  tcp_server.clients.itervalues())
2706
 
            
2707
 
            @dbus.service.method(_interface,
2708
 
                                 out_signature="a{oa{sv}}")
2709
 
            def GetAllClientsWithProperties(self):
2710
 
                "D-Bus method"
2711
 
                return dbus.Dictionary(
2712
 
                    ((c.dbus_object_path, c.GetAll(""))
2713
 
                     for c in tcp_server.clients.itervalues()),
2714
 
                    signature="oa{sv}")
2715
 
            
2716
 
            @dbus.service.method(_interface, in_signature="o")
2717
 
            def RemoveClient(self, object_path):
2718
 
                "D-Bus method"
2719
 
                for c in tcp_server.clients.itervalues():
2720
 
                    if c.dbus_object_path == object_path:
2721
 
                        del tcp_server.clients[c.name]
2722
 
                        c.remove_from_connection()
2723
 
                        # Don't signal anything except ClientRemoved
2724
 
                        c.disable(quiet=True)
2725
 
                        # Emit D-Bus signal
2726
 
                        self.ClientRemoved(object_path, c.name)
2727
 
                        return
2728
 
                raise KeyError(object_path)
2729
 
            
2730
 
            del _interface
2731
 
        
2732
 
        mandos_dbus_service = MandosDBusService()
 
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
2733
862
    
2734
863
    def cleanup():
2735
864
        "Cleanup function; run on exit"
2736
 
        if zeroconf:
2737
 
            service.cleanup()
2738
 
        
2739
 
        multiprocessing.active_children()
2740
 
        wnull.close()
2741
 
        if not (tcp_server.clients or client_settings):
2742
 
            return
2743
 
        
2744
 
        # Store client before exiting. Secrets are encrypted with key
2745
 
        # based on what config file has. If config file is
2746
 
        # removed/edited, old secret will thus be unrecovable.
2747
 
        clients = {}
2748
 
        with PGPEngine() as pgp:
2749
 
            for client in tcp_server.clients.itervalues():
2750
 
                key = client_settings[client.name]["secret"]
2751
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2752
 
                                                      key)
2753
 
                client_dict = {}
2754
 
                
2755
 
                # A list of attributes that can not be pickled
2756
 
                # + secret.
2757
 
                exclude = { "bus", "changedstate", "secret",
2758
 
                            "checker", "server_settings" }
2759
 
                for name, typ in (inspect.getmembers
2760
 
                                  (dbus.service.Object)):
2761
 
                    exclude.add(name)
2762
 
                
2763
 
                client_dict["encrypted_secret"] = (client
2764
 
                                                   .encrypted_secret)
2765
 
                for attr in client.client_structure:
2766
 
                    if attr not in exclude:
2767
 
                        client_dict[attr] = getattr(client, attr)
2768
 
                
2769
 
                clients[client.name] = client_dict
2770
 
                del client_settings[client.name]["secret"]
2771
 
        
2772
 
        try:
2773
 
            with (tempfile.NamedTemporaryFile
2774
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2775
 
                   dir=os.path.dirname(stored_state_path),
2776
 
                   delete=False)) as stored_state:
2777
 
                pickle.dump((clients, client_settings), stored_state)
2778
 
                tempname=stored_state.name
2779
 
            os.rename(tempname, stored_state_path)
2780
 
        except (IOError, OSError) as e:
2781
 
            if not debug:
2782
 
                try:
2783
 
                    os.remove(tempname)
2784
 
                except NameError:
2785
 
                    pass
2786
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2787
 
                logger.warning("Could not save persistent state: {}"
2788
 
                               .format(os.strerror(e.errno)))
2789
 
            else:
2790
 
                logger.warning("Could not save persistent state:",
2791
 
                               exc_info=e)
2792
 
                raise
2793
 
        
2794
 
        # Delete all clients, and settings from config
2795
 
        while tcp_server.clients:
2796
 
            name, client = tcp_server.clients.popitem()
2797
 
            if use_dbus:
2798
 
                client.remove_from_connection()
2799
 
            # Don't signal anything except ClientRemoved
2800
 
            client.disable(quiet=True)
2801
 
            if use_dbus:
2802
 
                # Emit D-Bus signal
2803
 
                mandos_dbus_service.ClientRemoved(client
2804
 
                                                  .dbus_object_path,
2805
 
                                                  client.name)
2806
 
        client_settings.clear()
 
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()
2807
876
    
2808
877
    atexit.register(cleanup)
2809
878
    
2810
 
    for client in tcp_server.clients.itervalues():
2811
 
        if use_dbus:
2812
 
            # Emit D-Bus signal
2813
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2814
 
        # Need to initiate checking of clients
2815
 
        if client.enabled:
2816
 
            client.init_checker()
 
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()
2817
886
    
2818
887
    tcp_server.enable()
2819
888
    tcp_server.server_activate()
2820
889
    
2821
890
    # Find out what port we got
2822
 
    if zeroconf:
2823
 
        service.port = tcp_server.socket.getsockname()[1]
2824
 
    if use_ipv6:
2825
 
        logger.info("Now listening on address %r, port %d,"
2826
 
                    " flowinfo %d, scope_id %d",
2827
 
                    *tcp_server.socket.getsockname())
2828
 
    else:                       # IPv4
2829
 
        logger.info("Now listening on address %r, port %d",
2830
 
                    *tcp_server.socket.getsockname())
 
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())
2831
894
    
2832
895
    #service.interface = tcp_server.socket.getsockname()[3]
2833
896
    
2834
897
    try:
2835
 
        if zeroconf:
2836
 
            # From the Avahi example code
2837
 
            try:
2838
 
                service.activate()
2839
 
            except dbus.exceptions.DBusException as error:
2840
 
                logger.critical("D-Bus Exception", exc_info=error)
2841
 
                cleanup()
2842
 
                sys.exit(1)
2843
 
            # End of Avahi example code
 
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
2844
906
        
2845
907
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2846
908
                             lambda *args, **kwargs:
2847
 
                             (tcp_server.handle_request
2848
 
                              (*args[2:], **kwargs) or True))
 
909
                             tcp_server.handle_request\
 
910
                             (*args[2:], **kwargs) or True)
2849
911
        
2850
 
        logger.debug("Starting main loop")
 
912
        logger.debug(u"Starting main loop")
 
913
        main_loop_started = True
2851
914
        main_loop.run()
2852
 
    except AvahiError as error:
2853
 
        logger.critical("Avahi Error", exc_info=error)
2854
 
        cleanup()
 
915
    except AvahiError, error:
 
916
        logger.critical(u"AvahiError: %s" + unicode(error))
2855
917
        sys.exit(1)
2856
918
    except KeyboardInterrupt:
2857
919
        if debug:
2858
 
            print("", file=sys.stderr)
2859
 
        logger.debug("Server received KeyboardInterrupt")
2860
 
    logger.debug("Server exiting")
2861
 
    # Must run before the D-Bus bus name gets deregistered
2862
 
    cleanup()
 
920
            print
2863
921
 
2864
922
if __name__ == '__main__':
2865
923
    main()