/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 server.py

  • Committer: Teddy Hogeborn
  • Date: 2008-01-18 20:11:37 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080118201137-oxhupsfl5ut9cjz5
* server.py (server_metaclass): New.
  (IPv6_UDPServer, IPv6_TCPServer): Use "server_metaclass" instead of
  "server_bind" and "init_with_options".  Removed "address_family" and
  "allow_reuse_address", since they are now added in "server_metaclass".
  (server_bind, init_with_options): Removed.
  
  (main): Pass "options" to Client constructor.
  (Client.__init__): Take an "options" parameter and use it.

Show diffs side-by-side

added added

removed removed

Lines of Context:
1
 
#!/usr/bin/python2.7
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
4
 
# Mandos server - give out binary blobs to connecting clients.
5
 
6
 
# This program is partly derived from an example program for an Avahi
7
 
# service publisher, downloaded from
8
 
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
12
 
13
 
# Everything else is
14
 
# Copyright © 2008-2015 Teddy Hogeborn
15
 
# Copyright © 2008-2015 Björn Påhlsson
16
 
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
19
 
# the Free Software Foundation, either version 3 of the License, or
20
 
# (at your option) any later version.
21
 
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
24
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
 
#     GNU General Public License for more details.
26
 
27
 
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
31
 
# Contact the authors at <mandos@recompile.se>.
32
 
33
 
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
from future_builtins import *
38
 
 
39
 
try:
40
 
    import SocketServer as socketserver
41
 
except ImportError:
42
 
    import socketserver
 
1
#!/usr/bin/python
 
2
 
 
3
import SocketServer
43
4
import socket
44
 
import argparse
 
5
import select
 
6
from optparse import OptionParser
45
7
import datetime
46
8
import errno
47
9
import gnutls.crypto
48
10
import gnutls.connection
49
11
import gnutls.errors
50
 
import gnutls.library.functions
51
 
import gnutls.library.constants
52
 
import gnutls.library.types
53
 
try:
54
 
    import ConfigParser as configparser
55
 
except ImportError:
56
 
    import configparser
 
12
import ConfigParser
57
13
import sys
58
 
import re
59
 
import os
60
 
import signal
61
 
import subprocess
62
 
import atexit
63
 
import stat
64
 
import logging
65
 
import logging.handlers
66
 
import pwd
67
 
import contextlib
68
 
import struct
69
 
import fcntl
70
 
import functools
71
 
try:
72
 
    import cPickle as pickle
73
 
except ImportError:
74
 
    import pickle
75
 
import multiprocessing
76
 
import types
77
 
import binascii
78
 
import tempfile
79
 
import itertools
80
 
import collections
81
 
import codecs
82
 
 
83
 
import dbus
84
 
import dbus.service
85
 
try:
86
 
    import gobject
87
 
except ImportError:
88
 
    from gi.repository import GObject as gobject
89
 
import avahi
90
 
from dbus.mainloop.glib import DBusGMainLoop
91
 
import ctypes
92
 
import ctypes.util
93
 
import xml.dom.minidom
94
 
import inspect
95
 
 
96
 
try:
97
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
98
 
except AttributeError:
99
 
    try:
100
 
        from IN import SO_BINDTODEVICE
101
 
    except ImportError:
102
 
        SO_BINDTODEVICE = None
103
 
 
104
 
if sys.version_info.major == 2:
105
 
    str = unicode
106
 
 
107
 
version = "1.6.9"
108
 
stored_state_file = "clients.pickle"
109
 
 
110
 
logger = logging.getLogger()
111
 
syslogger = None
112
 
 
113
 
try:
114
 
    if_nametoindex = ctypes.cdll.LoadLibrary(
115
 
        ctypes.util.find_library("c")).if_nametoindex
116
 
except (OSError, AttributeError):
117
 
    
118
 
    def if_nametoindex(interface):
119
 
        "Get an interface index the hard way, i.e. using fcntl()"
120
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
121
 
        with contextlib.closing(socket.socket()) as s:
122
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
 
                                struct.pack(b"16s16x", interface))
124
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
125
 
        return interface_index
126
 
 
127
 
 
128
 
def initlogger(debug, level=logging.WARNING):
129
 
    """init logger and add loglevel"""
130
 
    
131
 
    global syslogger
132
 
    syslogger = (logging.handlers.SysLogHandler(
133
 
        facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
 
        address = "/dev/log"))
135
 
    syslogger.setFormatter(logging.Formatter
136
 
                           ('Mandos [%(process)d]: %(levelname)s:'
137
 
                            ' %(message)s'))
138
 
    logger.addHandler(syslogger)
139
 
    
140
 
    if debug:
141
 
        console = logging.StreamHandler()
142
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
143
 
                                               ' [%(process)d]:'
144
 
                                               ' %(levelname)s:'
145
 
                                               ' %(message)s'))
146
 
        logger.addHandler(console)
147
 
    logger.setLevel(level)
148
 
 
149
 
 
150
 
class PGPError(Exception):
151
 
    """Exception if encryption/decryption fails"""
152
 
    pass
153
 
 
154
 
 
155
 
class PGPEngine(object):
156
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
157
 
    
158
 
    def __init__(self):
159
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
 
        self.gnupgargs = ['--batch',
161
 
                          '--home', self.tempdir,
162
 
                          '--force-mdc',
163
 
                          '--quiet',
164
 
                          '--no-use-agent']
165
 
    
166
 
    def __enter__(self):
167
 
        return self
168
 
    
169
 
    def __exit__(self, exc_type, exc_value, traceback):
170
 
        self._cleanup()
171
 
        return False
172
 
    
173
 
    def __del__(self):
174
 
        self._cleanup()
175
 
    
176
 
    def _cleanup(self):
177
 
        if self.tempdir is not None:
178
 
            # Delete contents of tempdir
179
 
            for root, dirs, files in os.walk(self.tempdir,
180
 
                                             topdown = False):
181
 
                for filename in files:
182
 
                    os.remove(os.path.join(root, filename))
183
 
                for dirname in dirs:
184
 
                    os.rmdir(os.path.join(root, dirname))
185
 
            # Remove tempdir
186
 
            os.rmdir(self.tempdir)
187
 
            self.tempdir = None
188
 
    
189
 
    def password_encode(self, password):
190
 
        # Passphrase can not be empty and can not contain newlines or
191
 
        # NUL bytes.  So we prefix it and hex encode it.
192
 
        encoded = b"mandos" + binascii.hexlify(password)
193
 
        if len(encoded) > 2048:
194
 
            # GnuPG can't handle long passwords, so encode differently
195
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
196
 
                       .replace(b"\n", b"\\n")
197
 
                       .replace(b"\0", b"\\x00"))
198
 
        return encoded
199
 
    
200
 
    def encrypt(self, data, password):
201
 
        passphrase = self.password_encode(password)
202
 
        with tempfile.NamedTemporaryFile(
203
 
                dir=self.tempdir) as passfile:
204
 
            passfile.write(passphrase)
205
 
            passfile.flush()
206
 
            proc = subprocess.Popen(['gpg', '--symmetric',
207
 
                                     '--passphrase-file',
208
 
                                     passfile.name]
209
 
                                    + self.gnupgargs,
210
 
                                    stdin = subprocess.PIPE,
211
 
                                    stdout = subprocess.PIPE,
212
 
                                    stderr = subprocess.PIPE)
213
 
            ciphertext, err = proc.communicate(input = data)
214
 
        if proc.returncode != 0:
215
 
            raise PGPError(err)
216
 
        return ciphertext
217
 
    
218
 
    def decrypt(self, data, password):
219
 
        passphrase = self.password_encode(password)
220
 
        with tempfile.NamedTemporaryFile(
221
 
                dir = self.tempdir) as passfile:
222
 
            passfile.write(passphrase)
223
 
            passfile.flush()
224
 
            proc = subprocess.Popen(['gpg', '--decrypt',
225
 
                                     '--passphrase-file',
226
 
                                     passfile.name]
227
 
                                    + self.gnupgargs,
228
 
                                    stdin = subprocess.PIPE,
229
 
                                    stdout = subprocess.PIPE,
230
 
                                    stderr = subprocess.PIPE)
231
 
            decrypted_plaintext, err = proc.communicate(input = data)
232
 
        if proc.returncode != 0:
233
 
            raise PGPError(err)
234
 
        return decrypted_plaintext
235
 
 
236
 
 
237
 
class AvahiError(Exception):
238
 
    def __init__(self, value, *args, **kwargs):
239
 
        self.value = value
240
 
        return super(AvahiError, self).__init__(value, *args,
241
 
                                                **kwargs)
242
 
 
243
 
 
244
 
class AvahiServiceError(AvahiError):
245
 
    pass
246
 
 
247
 
 
248
 
class AvahiGroupError(AvahiError):
249
 
    pass
250
 
 
251
 
 
252
 
class AvahiService(object):
253
 
    """An Avahi (Zeroconf) service.
254
 
    
255
 
    Attributes:
256
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
257
 
               Used to optionally bind to the specified interface.
258
 
    name: string; Example: 'Mandos'
259
 
    type: string; Example: '_mandos._tcp'.
260
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
261
 
    port: integer; what port to announce
262
 
    TXT: list of strings; TXT record for the service
263
 
    domain: string; Domain to publish on, default to .local if empty.
264
 
    host: string; Host to publish records for, default is localhost
265
 
    max_renames: integer; maximum number of renames
266
 
    rename_count: integer; counter so we only rename after collisions
267
 
                  a sensible number of times
268
 
    group: D-Bus Entry Group
269
 
    server: D-Bus Server
270
 
    bus: dbus.SystemBus()
271
 
    """
272
 
    
273
 
    def __init__(self,
274
 
                 interface = avahi.IF_UNSPEC,
275
 
                 name = None,
276
 
                 servicetype = None,
277
 
                 port = None,
278
 
                 TXT = None,
279
 
                 domain = "",
280
 
                 host = "",
281
 
                 max_renames = 32768,
282
 
                 protocol = avahi.PROTO_UNSPEC,
283
 
                 bus = None):
284
 
        self.interface = interface
285
 
        self.name = name
286
 
        self.type = servicetype
287
 
        self.port = port
288
 
        self.TXT = TXT if TXT is not None else []
289
 
        self.domain = domain
290
 
        self.host = host
291
 
        self.rename_count = 0
292
 
        self.max_renames = max_renames
293
 
        self.protocol = protocol
294
 
        self.group = None       # our entry group
295
 
        self.server = None
296
 
        self.bus = bus
297
 
        self.entry_group_state_changed_match = None
298
 
    
299
 
    def rename(self, remove=True):
300
 
        """Derived from the Avahi example code"""
301
 
        if self.rename_count >= self.max_renames:
302
 
            logger.critical("No suitable Zeroconf service name found"
303
 
                            " after %i retries, exiting.",
304
 
                            self.rename_count)
305
 
            raise AvahiServiceError("Too many renames")
306
 
        self.name = str(
307
 
            self.server.GetAlternativeServiceName(self.name))
308
 
        self.rename_count += 1
309
 
        logger.info("Changing Zeroconf service name to %r ...",
310
 
                    self.name)
311
 
        if remove:
312
 
            self.remove()
313
 
        try:
314
 
            self.add()
315
 
        except dbus.exceptions.DBusException as error:
316
 
            if (error.get_dbus_name()
317
 
                == "org.freedesktop.Avahi.CollisionError"):
318
 
                logger.info("Local Zeroconf service name collision.")
319
 
                return self.rename(remove=False)
320
 
            else:
321
 
                logger.critical("D-Bus Exception", exc_info=error)
322
 
                self.cleanup()
323
 
                os._exit(1)
324
 
    
325
 
    def remove(self):
326
 
        """Derived from the Avahi example code"""
327
 
        if self.entry_group_state_changed_match is not None:
328
 
            self.entry_group_state_changed_match.remove()
329
 
            self.entry_group_state_changed_match = None
330
 
        if self.group is not None:
331
 
            self.group.Reset()
332
 
    
333
 
    def add(self):
334
 
        """Derived from the Avahi example code"""
335
 
        self.remove()
336
 
        if self.group is None:
337
 
            self.group = dbus.Interface(
338
 
                self.bus.get_object(avahi.DBUS_NAME,
339
 
                                    self.server.EntryGroupNew()),
340
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
341
 
        self.entry_group_state_changed_match = (
342
 
            self.group.connect_to_signal(
343
 
                'StateChanged', self.entry_group_state_changed))
344
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
345
 
                     self.name, self.type)
346
 
        self.group.AddService(
347
 
            self.interface,
348
 
            self.protocol,
349
 
            dbus.UInt32(0),     # flags
350
 
            self.name, self.type,
351
 
            self.domain, self.host,
352
 
            dbus.UInt16(self.port),
353
 
            avahi.string_array_to_txt_array(self.TXT))
354
 
        self.group.Commit()
355
 
    
356
 
    def entry_group_state_changed(self, state, error):
357
 
        """Derived from the Avahi example code"""
358
 
        logger.debug("Avahi entry group state change: %i", state)
359
 
        
360
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
361
 
            logger.debug("Zeroconf service established.")
362
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
363
 
            logger.info("Zeroconf service name collision.")
364
 
            self.rename()
365
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
366
 
            logger.critical("Avahi: Error in group state changed %s",
367
 
                            str(error))
368
 
            raise AvahiGroupError("State changed: {!s}".format(error))
369
 
    
370
 
    def cleanup(self):
371
 
        """Derived from the Avahi example code"""
372
 
        if self.group is not None:
373
 
            try:
374
 
                self.group.Free()
375
 
            except (dbus.exceptions.UnknownMethodException,
376
 
                    dbus.exceptions.DBusException):
377
 
                pass
378
 
            self.group = None
379
 
        self.remove()
380
 
    
381
 
    def server_state_changed(self, state, error=None):
382
 
        """Derived from the Avahi example code"""
383
 
        logger.debug("Avahi server state change: %i", state)
384
 
        bad_states = {
385
 
            avahi.SERVER_INVALID: "Zeroconf server invalid",
386
 
            avahi.SERVER_REGISTERING: None,
387
 
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
388
 
            avahi.SERVER_FAILURE: "Zeroconf server failure",
389
 
        }
390
 
        if state in bad_states:
391
 
            if bad_states[state] is not None:
392
 
                if error is None:
393
 
                    logger.error(bad_states[state])
394
 
                else:
395
 
                    logger.error(bad_states[state] + ": %r", error)
396
 
            self.cleanup()
397
 
        elif state == avahi.SERVER_RUNNING:
398
 
            self.add()
399
 
        else:
400
 
            if error is None:
401
 
                logger.debug("Unknown state: %r", state)
402
 
            else:
403
 
                logger.debug("Unknown state: %r: %r", state, error)
404
 
    
405
 
    def activate(self):
406
 
        """Derived from the Avahi example code"""
407
 
        if self.server is None:
408
 
            self.server = dbus.Interface(
409
 
                self.bus.get_object(avahi.DBUS_NAME,
410
 
                                    avahi.DBUS_PATH_SERVER,
411
 
                                    follow_name_owner_changes=True),
412
 
                avahi.DBUS_INTERFACE_SERVER)
413
 
        self.server.connect_to_signal("StateChanged",
414
 
                                      self.server_state_changed)
415
 
        self.server_state_changed(self.server.GetState())
416
 
 
417
 
 
418
 
class AvahiServiceToSyslog(AvahiService):
419
 
    def rename(self, *args, **kwargs):
420
 
        """Add the new name to the syslog messages"""
421
 
        ret = AvahiService.rename(self, *args, **kwargs)
422
 
        syslogger.setFormatter(logging.Formatter(
423
 
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
424
 
            .format(self.name)))
425
 
        return ret
426
14
 
427
15
 
428
16
class Client(object):
429
 
    """A representation of a client host served by this server.
430
 
    
431
 
    Attributes:
432
 
    approved:   bool(); 'None' if not yet approved/disapproved
433
 
    approval_delay: datetime.timedelta(); Time to wait for approval
434
 
    approval_duration: datetime.timedelta(); Duration of one approval
435
 
    checker:    subprocess.Popen(); a running checker process used
436
 
                                    to see if the client lives.
437
 
                                    'None' if no process is running.
438
 
    checker_callback_tag: a gobject event source tag, or None
439
 
    checker_command: string; External command which is run to check
440
 
                     if client lives.  %() expansions are done at
441
 
                     runtime with vars(self) as dict, so that for
442
 
                     instance %(name)s can be used in the command.
443
 
    checker_initiator_tag: a gobject event source tag, or None
444
 
    created:    datetime.datetime(); (UTC) object creation
445
 
    client_structure: Object describing what attributes a client has
446
 
                      and is used for storing the client at exit
447
 
    current_checker_command: string; current running checker_command
448
 
    disable_initiator_tag: a gobject event source tag, or None
449
 
    enabled:    bool()
450
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
451
 
                 uniquely identify the client
452
 
    host:       string; available for use by the checker command
453
 
    interval:   datetime.timedelta(); How often to start a new checker
454
 
    last_approval_request: datetime.datetime(); (UTC) or None
455
 
    last_checked_ok: datetime.datetime(); (UTC) or None
456
 
    last_checker_status: integer between 0 and 255 reflecting exit
457
 
                         status of last checker. -1 reflects crashed
458
 
                         checker, -2 means no checker completed yet.
459
 
    last_enabled: datetime.datetime(); (UTC) or None
460
 
    name:       string; from the config file, used in log messages and
461
 
                        D-Bus identifiers
462
 
    secret:     bytestring; sent verbatim (over TLS) to client
463
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
464
 
                                      until this client is disabled
465
 
    extended_timeout:   extra long timeout when secret has been sent
466
 
    runtime_expansions: Allowed attributes for runtime expansion.
467
 
    expires:    datetime.datetime(); time (UTC) when a client will be
468
 
                disabled, or None
469
 
    server_settings: The server_settings dict from main()
470
 
    """
471
 
    
472
 
    runtime_expansions = ("approval_delay", "approval_duration",
473
 
                          "created", "enabled", "expires",
474
 
                          "fingerprint", "host", "interval",
475
 
                          "last_approval_request", "last_checked_ok",
476
 
                          "last_enabled", "name", "timeout")
477
 
    client_defaults = {
478
 
        "timeout": "PT5M",
479
 
        "extended_timeout": "PT15M",
480
 
        "interval": "PT2M",
481
 
        "checker": "fping -q -- %%(host)s",
482
 
        "host": "",
483
 
        "approval_delay": "PT0S",
484
 
        "approval_duration": "PT1S",
485
 
        "approved_by_default": "True",
486
 
        "enabled": "True",
487
 
    }
488
 
    
489
 
    @staticmethod
490
 
    def config_parser(config):
491
 
        """Construct a new dict of client settings of this form:
492
 
        { client_name: {setting_name: value, ...}, ...}
493
 
        with exceptions for any special settings as defined above.
494
 
        NOTE: Must be a pure function. Must return the same result
495
 
        value given the same arguments.
496
 
        """
497
 
        settings = {}
498
 
        for client_name in config.sections():
499
 
            section = dict(config.items(client_name))
500
 
            client = settings[client_name] = {}
501
 
            
502
 
            client["host"] = section["host"]
503
 
            # Reformat values from string types to Python types
504
 
            client["approved_by_default"] = config.getboolean(
505
 
                client_name, "approved_by_default")
506
 
            client["enabled"] = config.getboolean(client_name,
507
 
                                                  "enabled")
508
 
            
509
 
            # Uppercase and remove spaces from fingerprint for later
510
 
            # comparison purposes with return value from the
511
 
            # fingerprint() function
512
 
            client["fingerprint"] = (section["fingerprint"].upper()
513
 
                                     .replace(" ", ""))
514
 
            if "secret" in section:
515
 
                client["secret"] = section["secret"].decode("base64")
516
 
            elif "secfile" in section:
517
 
                with open(os.path.expanduser(os.path.expandvars
518
 
                                             (section["secfile"])),
519
 
                          "rb") as secfile:
520
 
                    client["secret"] = secfile.read()
521
 
            else:
522
 
                raise TypeError("No secret or secfile for section {}"
523
 
                                .format(section))
524
 
            client["timeout"] = string_to_delta(section["timeout"])
525
 
            client["extended_timeout"] = string_to_delta(
526
 
                section["extended_timeout"])
527
 
            client["interval"] = string_to_delta(section["interval"])
528
 
            client["approval_delay"] = string_to_delta(
529
 
                section["approval_delay"])
530
 
            client["approval_duration"] = string_to_delta(
531
 
                section["approval_duration"])
532
 
            client["checker_command"] = section["checker"]
533
 
            client["last_approval_request"] = None
534
 
            client["last_checked_ok"] = None
535
 
            client["last_checker_status"] = -2
536
 
        
537
 
        return settings
538
 
    
539
 
    def __init__(self, settings, name = None, server_settings=None):
 
17
    def __init__(self, name=None, options=None, dn=None,
 
18
                 password=None, passfile=None, fqdn=None,
 
19
                 timeout=None, interval=-1):
540
20
        self.name = name
541
 
        if server_settings is None:
542
 
            server_settings = {}
543
 
        self.server_settings = server_settings
544
 
        # adding all client settings
545
 
        for setting, value in settings.items():
546
 
            setattr(self, setting, value)
547
 
        
548
 
        if self.enabled:
549
 
            if not hasattr(self, "last_enabled"):
550
 
                self.last_enabled = datetime.datetime.utcnow()
551
 
            if not hasattr(self, "expires"):
552
 
                self.expires = (datetime.datetime.utcnow()
553
 
                                + self.timeout)
554
 
        else:
555
 
            self.last_enabled = None
556
 
            self.expires = None
557
 
        
558
 
        logger.debug("Creating client %r", self.name)
559
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
560
 
        self.created = settings.get("created",
561
 
                                    datetime.datetime.utcnow())
562
 
        
563
 
        # attributes specific for this server instance
564
 
        self.checker = None
565
 
        self.checker_initiator_tag = None
566
 
        self.disable_initiator_tag = None
567
 
        self.checker_callback_tag = None
568
 
        self.current_checker_command = None
569
 
        self.approved = None
570
 
        self.approvals_pending = 0
571
 
        self.changedstate = multiprocessing_manager.Condition(
572
 
            multiprocessing_manager.Lock())
573
 
        self.client_structure = [attr
574
 
                                 for attr in self.__dict__.iterkeys()
575
 
                                 if not attr.startswith("_")]
576
 
        self.client_structure.append("client_structure")
577
 
        
578
 
        for name, t in inspect.getmembers(
579
 
                type(self), lambda obj: isinstance(obj, property)):
580
 
            if not name.startswith("_"):
581
 
                self.client_structure.append(name)
582
 
    
583
 
    # Send notice to process children that client state has changed
584
 
    def send_changedstate(self):
585
 
        with self.changedstate:
586
 
            self.changedstate.notify_all()
587
 
    
588
 
    def enable(self):
589
 
        """Start this client's checker and timeout hooks"""
590
 
        if getattr(self, "enabled", False):
591
 
            # Already enabled
592
 
            return
593
 
        self.expires = datetime.datetime.utcnow() + self.timeout
594
 
        self.enabled = True
595
 
        self.last_enabled = datetime.datetime.utcnow()
596
 
        self.init_checker()
597
 
        self.send_changedstate()
598
 
    
599
 
    def disable(self, quiet=True):
600
 
        """Disable this client."""
601
 
        if not getattr(self, "enabled", False):
602
 
            return False
603
 
        if not quiet:
604
 
            logger.info("Disabling client %s", self.name)
605
 
        if getattr(self, "disable_initiator_tag", None) is not None:
606
 
            gobject.source_remove(self.disable_initiator_tag)
607
 
            self.disable_initiator_tag = None
608
 
        self.expires = None
609
 
        if getattr(self, "checker_initiator_tag", None) is not None:
610
 
            gobject.source_remove(self.checker_initiator_tag)
611
 
            self.checker_initiator_tag = None
612
 
        self.stop_checker()
613
 
        self.enabled = False
614
 
        if not quiet:
615
 
            self.send_changedstate()
616
 
        # Do not run this again if called by a gobject.timeout_add
617
 
        return False
618
 
    
619
 
    def __del__(self):
620
 
        self.disable()
621
 
    
622
 
    def init_checker(self):
623
 
        # Schedule a new checker to be started an 'interval' from now,
624
 
        # and every interval from then on.
625
 
        if self.checker_initiator_tag is not None:
626
 
            gobject.source_remove(self.checker_initiator_tag)
627
 
        self.checker_initiator_tag = gobject.timeout_add(
628
 
            int(self.interval.total_seconds() * 1000),
629
 
            self.start_checker)
630
 
        # Schedule a disable() when 'timeout' has passed
631
 
        if self.disable_initiator_tag is not None:
632
 
            gobject.source_remove(self.disable_initiator_tag)
633
 
        self.disable_initiator_tag = gobject.timeout_add(
634
 
            int(self.timeout.total_seconds() * 1000), self.disable)
635
 
        # Also start a new checker *right now*.
636
 
        self.start_checker()
637
 
    
638
 
    def checker_callback(self, pid, condition, command):
639
 
        """The checker has completed, so take appropriate actions."""
640
 
        self.checker_callback_tag = None
641
 
        self.checker = None
642
 
        if os.WIFEXITED(condition):
643
 
            self.last_checker_status = os.WEXITSTATUS(condition)
644
 
            if self.last_checker_status == 0:
645
 
                logger.info("Checker for %(name)s succeeded",
646
 
                            vars(self))
647
 
                self.checked_ok()
648
 
            else:
649
 
                logger.info("Checker for %(name)s failed", vars(self))
650
 
        else:
651
 
            self.last_checker_status = -1
652
 
            logger.warning("Checker for %(name)s crashed?",
653
 
                           vars(self))
654
 
    
655
 
    def checked_ok(self):
656
 
        """Assert that the client has been seen, alive and well."""
657
 
        self.last_checked_ok = datetime.datetime.utcnow()
658
 
        self.last_checker_status = 0
659
 
        self.bump_timeout()
660
 
    
661
 
    def bump_timeout(self, timeout=None):
662
 
        """Bump up the timeout for this client."""
 
21
        self.dn = dn
 
22
        if password:
 
23
            self.password = password
 
24
        elif passfile:
 
25
            self.password = open(passfile).readall()
 
26
        else:
 
27
            print "No Password or Passfile in client config file"
 
28
            # raise RuntimeError XXX
 
29
            self.password = "gazonk"
 
30
        self.fqdn = fqdn
 
31
        self.created = datetime.datetime.now()
 
32
        self.last_seen = None
663
33
        if timeout is None:
664
 
            timeout = self.timeout
665
 
        if self.disable_initiator_tag is not None:
666
 
            gobject.source_remove(self.disable_initiator_tag)
667
 
            self.disable_initiator_tag = None
668
 
        if getattr(self, "enabled", False):
669
 
            self.disable_initiator_tag = gobject.timeout_add(
670
 
                int(timeout.total_seconds() * 1000), self.disable)
671
 
            self.expires = datetime.datetime.utcnow() + timeout
672
 
    
673
 
    def need_approval(self):
674
 
        self.last_approval_request = datetime.datetime.utcnow()
675
 
    
676
 
    def start_checker(self):
677
 
        """Start a new checker subprocess if one is not running.
678
 
        
679
 
        If a checker already exists, leave it running and do
680
 
        nothing."""
681
 
        # The reason for not killing a running checker is that if we
682
 
        # did that, and if a checker (for some reason) started running
683
 
        # slowly and taking more than 'interval' time, then the client
684
 
        # would inevitably timeout, since no checker would get a
685
 
        # chance to run to completion.  If we instead leave running
686
 
        # checkers alone, the checker would have to take more time
687
 
        # than 'timeout' for the client to be disabled, which is as it
688
 
        # should be.
689
 
        
690
 
        # If a checker exists, make sure it is not a zombie
691
 
        try:
692
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
 
        except AttributeError:
694
 
            pass
695
 
        except OSError as error:
696
 
            if error.errno != errno.ECHILD:
697
 
                raise
698
 
        else:
699
 
            if pid:
700
 
                logger.warning("Checker was a zombie")
701
 
                gobject.source_remove(self.checker_callback_tag)
702
 
                self.checker_callback(pid, status,
703
 
                                      self.current_checker_command)
704
 
        # Start a new checker if needed
705
 
        if self.checker is None:
706
 
            # Escape attributes for the shell
707
 
            escaped_attrs = {
708
 
                attr: re.escape(str(getattr(self, attr)))
709
 
                for attr in self.runtime_expansions }
710
 
            try:
711
 
                command = self.checker_command % escaped_attrs
712
 
            except TypeError as error:
713
 
                logger.error('Could not format string "%s"',
714
 
                             self.checker_command,
715
 
                             exc_info=error)
716
 
                return True     # Try again later
717
 
            self.current_checker_command = command
718
 
            try:
719
 
                logger.info("Starting checker %r for %s", command,
720
 
                            self.name)
721
 
                # We don't need to redirect stdout and stderr, since
722
 
                # in normal mode, that is already done by daemon(),
723
 
                # and in debug mode we don't want to.  (Stdin is
724
 
                # always replaced by /dev/null.)
725
 
                # The exception is when not debugging but nevertheless
726
 
                # running in the foreground; use the previously
727
 
                # created wnull.
728
 
                popen_args = {}
729
 
                if (not self.server_settings["debug"]
730
 
                    and self.server_settings["foreground"]):
731
 
                    popen_args.update({"stdout": wnull,
732
 
                                       "stderr": wnull })
733
 
                self.checker = subprocess.Popen(command,
734
 
                                                close_fds=True,
735
 
                                                shell=True,
736
 
                                                cwd="/",
737
 
                                                **popen_args)
738
 
            except OSError as error:
739
 
                logger.error("Failed to start subprocess",
740
 
                             exc_info=error)
741
 
                return True
742
 
            self.checker_callback_tag = gobject.child_watch_add(
743
 
                self.checker.pid, self.checker_callback, data=command)
744
 
            # The checker may have completed before the gobject
745
 
            # watch was added.  Check for this.
746
 
            try:
747
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
748
 
            except OSError as error:
749
 
                if error.errno == errno.ECHILD:
750
 
                    # This should never happen
751
 
                    logger.error("Child process vanished",
752
 
                                 exc_info=error)
753
 
                    return True
754
 
                raise
755
 
            if pid:
756
 
                gobject.source_remove(self.checker_callback_tag)
757
 
                self.checker_callback(pid, status, command)
758
 
        # Re-run this periodically if run by gobject.timeout_add
759
 
        return True
760
 
    
761
 
    def stop_checker(self):
762
 
        """Force the checker process, if any, to stop."""
763
 
        if self.checker_callback_tag:
764
 
            gobject.source_remove(self.checker_callback_tag)
765
 
            self.checker_callback_tag = None
766
 
        if getattr(self, "checker", None) is None:
767
 
            return
768
 
        logger.debug("Stopping checker for %(name)s", vars(self))
769
 
        try:
770
 
            self.checker.terminate()
771
 
            #time.sleep(0.5)
772
 
            #if self.checker.poll() is None:
773
 
            #    self.checker.kill()
774
 
        except OSError as error:
775
 
            if error.errno != errno.ESRCH: # No such process
776
 
                raise
777
 
        self.checker = None
778
 
 
779
 
 
780
 
def dbus_service_property(dbus_interface,
781
 
                          signature="v",
782
 
                          access="readwrite",
783
 
                          byte_arrays=False):
784
 
    """Decorators for marking methods of a DBusObjectWithProperties to
785
 
    become properties on the D-Bus.
786
 
    
787
 
    The decorated method will be called with no arguments by "Get"
788
 
    and with one argument by "Set".
789
 
    
790
 
    The parameters, where they are supported, are the same as
791
 
    dbus.service.method, except there is only "signature", since the
792
 
    type from Get() and the type sent to Set() is the same.
793
 
    """
794
 
    # Encoding deeply encoded byte arrays is not supported yet by the
795
 
    # "Set" method, so we fail early here:
796
 
    if byte_arrays and signature != "ay":
797
 
        raise ValueError("Byte arrays not supported for non-'ay'"
798
 
                         " signature {!r}".format(signature))
799
 
    
800
 
    def decorator(func):
801
 
        func._dbus_is_property = True
802
 
        func._dbus_interface = dbus_interface
803
 
        func._dbus_signature = signature
804
 
        func._dbus_access = access
805
 
        func._dbus_name = func.__name__
806
 
        if func._dbus_name.endswith("_dbus_property"):
807
 
            func._dbus_name = func._dbus_name[:-14]
808
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
809
 
        return func
810
 
    
811
 
    return decorator
812
 
 
813
 
 
814
 
def dbus_interface_annotations(dbus_interface):
815
 
    """Decorator for marking functions returning interface annotations
816
 
    
817
 
    Usage:
818
 
    
819
 
    @dbus_interface_annotations("org.example.Interface")
820
 
    def _foo(self):  # Function name does not matter
821
 
        return {"org.freedesktop.DBus.Deprecated": "true",
822
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
823
 
                    "false"}
824
 
    """
825
 
    
826
 
    def decorator(func):
827
 
        func._dbus_is_interface = True
828
 
        func._dbus_interface = dbus_interface
829
 
        func._dbus_name = dbus_interface
830
 
        return func
831
 
    
832
 
    return decorator
833
 
 
834
 
 
835
 
def dbus_annotations(annotations):
836
 
    """Decorator to annotate D-Bus methods, signals or properties
837
 
    Usage:
838
 
    
839
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
840
 
                       "org.freedesktop.DBus.Property."
841
 
                       "EmitsChangedSignal": "false"})
842
 
    @dbus_service_property("org.example.Interface", signature="b",
843
 
                           access="r")
844
 
    def Property_dbus_property(self):
845
 
        return dbus.Boolean(False)
846
 
    """
847
 
    
848
 
    def decorator(func):
849
 
        func._dbus_annotations = annotations
850
 
        return func
851
 
    
852
 
    return decorator
853
 
 
854
 
 
855
 
class DBusPropertyException(dbus.exceptions.DBusException):
856
 
    """A base class for D-Bus property-related exceptions
857
 
    """
858
 
    pass
859
 
 
860
 
 
861
 
class DBusPropertyAccessException(DBusPropertyException):
862
 
    """A property's access permissions disallows an operation.
863
 
    """
864
 
    pass
865
 
 
866
 
 
867
 
class DBusPropertyNotFound(DBusPropertyException):
868
 
    """An attempt was made to access a non-existing property.
869
 
    """
870
 
    pass
871
 
 
872
 
 
873
 
class DBusObjectWithProperties(dbus.service.Object):
874
 
    """A D-Bus object with properties.
875
 
    
876
 
    Classes inheriting from this can use the dbus_service_property
877
 
    decorator to expose methods as D-Bus properties.  It exposes the
878
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
879
 
    """
880
 
    
881
 
    @staticmethod
882
 
    def _is_dbus_thing(thing):
883
 
        """Returns a function testing if an attribute is a D-Bus thing
884
 
        
885
 
        If called like _is_dbus_thing("method") it returns a function
886
 
        suitable for use as predicate to inspect.getmembers().
887
 
        """
888
 
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
889
 
                                   False)
890
 
    
891
 
    def _get_all_dbus_things(self, thing):
892
 
        """Returns a generator of (name, attribute) pairs
893
 
        """
894
 
        return ((getattr(athing.__get__(self), "_dbus_name", name),
895
 
                 athing.__get__(self))
896
 
                for cls in self.__class__.__mro__
897
 
                for name, athing in
898
 
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
899
 
    
900
 
    def _get_dbus_property(self, interface_name, property_name):
901
 
        """Returns a bound method if one exists which is a D-Bus
902
 
        property with the specified name and interface.
903
 
        """
904
 
        for cls in self.__class__.__mro__:
905
 
            for name, value in inspect.getmembers(
906
 
                    cls, self._is_dbus_thing("property")):
907
 
                if (value._dbus_name == property_name
908
 
                    and value._dbus_interface == interface_name):
909
 
                    return value.__get__(self)
910
 
        
911
 
        # No such property
912
 
        raise DBusPropertyNotFound("{}:{}.{}".format(
913
 
            self.dbus_object_path, interface_name, property_name))
914
 
    
915
 
    @dbus.service.method(dbus.PROPERTIES_IFACE,
916
 
                         in_signature="ss",
917
 
                         out_signature="v")
918
 
    def Get(self, interface_name, property_name):
919
 
        """Standard D-Bus property Get() method, see D-Bus standard.
920
 
        """
921
 
        prop = self._get_dbus_property(interface_name, property_name)
922
 
        if prop._dbus_access == "write":
923
 
            raise DBusPropertyAccessException(property_name)
924
 
        value = prop()
925
 
        if not hasattr(value, "variant_level"):
926
 
            return value
927
 
        return type(value)(value, variant_level=value.variant_level+1)
928
 
    
929
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
930
 
    def Set(self, interface_name, property_name, value):
931
 
        """Standard D-Bus property Set() method, see D-Bus standard.
932
 
        """
933
 
        prop = self._get_dbus_property(interface_name, property_name)
934
 
        if prop._dbus_access == "read":
935
 
            raise DBusPropertyAccessException(property_name)
936
 
        if prop._dbus_get_args_options["byte_arrays"]:
937
 
            # The byte_arrays option is not supported yet on
938
 
            # signatures other than "ay".
939
 
            if prop._dbus_signature != "ay":
940
 
                raise ValueError("Byte arrays not supported for non-"
941
 
                                 "'ay' signature {!r}"
942
 
                                 .format(prop._dbus_signature))
943
 
            value = dbus.ByteArray(b''.join(chr(byte)
944
 
                                            for byte in value))
945
 
        prop(value)
946
 
    
947
 
    @dbus.service.method(dbus.PROPERTIES_IFACE,
948
 
                         in_signature="s",
949
 
                         out_signature="a{sv}")
950
 
    def GetAll(self, interface_name):
951
 
        """Standard D-Bus property GetAll() method, see D-Bus
952
 
        standard.
953
 
        
954
 
        Note: Will not include properties with access="write".
955
 
        """
956
 
        properties = {}
957
 
        for name, prop in self._get_all_dbus_things("property"):
958
 
            if (interface_name
959
 
                and interface_name != prop._dbus_interface):
960
 
                # Interface non-empty but did not match
961
 
                continue
962
 
            # Ignore write-only properties
963
 
            if prop._dbus_access == "write":
964
 
                continue
965
 
            value = prop()
966
 
            if not hasattr(value, "variant_level"):
967
 
                properties[name] = value
968
 
                continue
969
 
            properties[name] = type(value)(
970
 
                value, variant_level = value.variant_level + 1)
971
 
        return dbus.Dictionary(properties, signature="sv")
972
 
    
973
 
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
974
 
    def PropertiesChanged(self, interface_name, changed_properties,
975
 
                          invalidated_properties):
976
 
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
977
 
        standard.
978
 
        """
979
 
        pass
980
 
    
981
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
982
 
                         out_signature="s",
983
 
                         path_keyword='object_path',
984
 
                         connection_keyword='connection')
985
 
    def Introspect(self, object_path, connection):
986
 
        """Overloading of standard D-Bus method.
987
 
        
988
 
        Inserts property tags and interface annotation tags.
989
 
        """
990
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
991
 
                                                   connection)
992
 
        try:
993
 
            document = xml.dom.minidom.parseString(xmlstring)
994
 
            
995
 
            def make_tag(document, name, prop):
996
 
                e = document.createElement("property")
997
 
                e.setAttribute("name", name)
998
 
                e.setAttribute("type", prop._dbus_signature)
999
 
                e.setAttribute("access", prop._dbus_access)
1000
 
                return e
1001
 
            
1002
 
            for if_tag in document.getElementsByTagName("interface"):
1003
 
                # Add property tags
1004
 
                for tag in (make_tag(document, name, prop)
1005
 
                            for name, prop
1006
 
                            in self._get_all_dbus_things("property")
1007
 
                            if prop._dbus_interface
1008
 
                            == if_tag.getAttribute("name")):
1009
 
                    if_tag.appendChild(tag)
1010
 
                # Add annotation tags
1011
 
                for typ in ("method", "signal", "property"):
1012
 
                    for tag in if_tag.getElementsByTagName(typ):
1013
 
                        annots = dict()
1014
 
                        for name, prop in (self.
1015
 
                                           _get_all_dbus_things(typ)):
1016
 
                            if (name == tag.getAttribute("name")
1017
 
                                and prop._dbus_interface
1018
 
                                == if_tag.getAttribute("name")):
1019
 
                                annots.update(getattr(
1020
 
                                    prop, "_dbus_annotations", {}))
1021
 
                        for name, value in annots.items():
1022
 
                            ann_tag = document.createElement(
1023
 
                                "annotation")
1024
 
                            ann_tag.setAttribute("name", name)
1025
 
                            ann_tag.setAttribute("value", value)
1026
 
                            tag.appendChild(ann_tag)
1027
 
                # Add interface annotation tags
1028
 
                for annotation, value in dict(
1029
 
                    itertools.chain.from_iterable(
1030
 
                        annotations().items()
1031
 
                        for name, annotations
1032
 
                        in self._get_all_dbus_things("interface")
1033
 
                        if name == if_tag.getAttribute("name")
1034
 
                        )).items():
1035
 
                    ann_tag = document.createElement("annotation")
1036
 
                    ann_tag.setAttribute("name", annotation)
1037
 
                    ann_tag.setAttribute("value", value)
1038
 
                    if_tag.appendChild(ann_tag)
1039
 
                # Add the names to the return values for the
1040
 
                # "org.freedesktop.DBus.Properties" methods
1041
 
                if (if_tag.getAttribute("name")
1042
 
                    == "org.freedesktop.DBus.Properties"):
1043
 
                    for cn in if_tag.getElementsByTagName("method"):
1044
 
                        if cn.getAttribute("name") == "Get":
1045
 
                            for arg in cn.getElementsByTagName("arg"):
1046
 
                                if (arg.getAttribute("direction")
1047
 
                                    == "out"):
1048
 
                                    arg.setAttribute("name", "value")
1049
 
                        elif cn.getAttribute("name") == "GetAll":
1050
 
                            for arg in cn.getElementsByTagName("arg"):
1051
 
                                if (arg.getAttribute("direction")
1052
 
                                    == "out"):
1053
 
                                    arg.setAttribute("name", "props")
1054
 
            xmlstring = document.toxml("utf-8")
1055
 
            document.unlink()
1056
 
        except (AttributeError, xml.dom.DOMException,
1057
 
                xml.parsers.expat.ExpatError) as error:
1058
 
            logger.error("Failed to override Introspection method",
1059
 
                         exc_info=error)
1060
 
        return xmlstring
1061
 
 
1062
 
 
1063
 
def datetime_to_dbus(dt, variant_level=0):
1064
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1065
 
    if dt is None:
1066
 
        return dbus.String("", variant_level = variant_level)
1067
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
1068
 
 
1069
 
 
1070
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1071
 
    """A class decorator; applied to a subclass of
1072
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1073
 
    interface names according to the "alt_interface_names" mapping.
1074
 
    Usage:
1075
 
    
1076
 
    @alternate_dbus_interfaces({"org.example.Interface":
1077
 
                                    "net.example.AlternateInterface"})
1078
 
    class SampleDBusObject(dbus.service.Object):
1079
 
        @dbus.service.method("org.example.Interface")
1080
 
        def SampleDBusMethod():
1081
 
            pass
1082
 
    
1083
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1084
 
    reachable via two interfaces: "org.example.Interface" and
1085
 
    "net.example.AlternateInterface", the latter of which will have
1086
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1087
 
    "true", unless "deprecate" is passed with a False value.
1088
 
    
1089
 
    This works for methods and signals, and also for D-Bus properties
1090
 
    (from DBusObjectWithProperties) and interfaces (from the
1091
 
    dbus_interface_annotations decorator).
1092
 
    """
1093
 
    
1094
 
    def wrapper(cls):
1095
 
        for orig_interface_name, alt_interface_name in (
1096
 
                alt_interface_names.items()):
1097
 
            attr = {}
1098
 
            interface_names = set()
1099
 
            # Go though all attributes of the class
1100
 
            for attrname, attribute in inspect.getmembers(cls):
1101
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1102
 
                # with the wrong interface name
1103
 
                if (not hasattr(attribute, "_dbus_interface")
1104
 
                    or not attribute._dbus_interface.startswith(
1105
 
                        orig_interface_name)):
1106
 
                    continue
1107
 
                # Create an alternate D-Bus interface name based on
1108
 
                # the current name
1109
 
                alt_interface = attribute._dbus_interface.replace(
1110
 
                    orig_interface_name, alt_interface_name)
1111
 
                interface_names.add(alt_interface)
1112
 
                # Is this a D-Bus signal?
1113
 
                if getattr(attribute, "_dbus_is_signal", False):
1114
 
                    if sys.version == 2:
1115
 
                        # Extract the original non-method undecorated
1116
 
                        # function by black magic
1117
 
                        nonmethod_func = (dict(
1118
 
                            zip(attribute.func_code.co_freevars,
1119
 
                                attribute.__closure__))
1120
 
                                          ["func"].cell_contents)
1121
 
                    else:
1122
 
                        nonmethod_func = attribute
1123
 
                    # Create a new, but exactly alike, function
1124
 
                    # object, and decorate it to be a new D-Bus signal
1125
 
                    # with the alternate D-Bus interface name
1126
 
                    if sys.version == 2:
1127
 
                        new_function = types.FunctionType(
1128
 
                            nonmethod_func.func_code,
1129
 
                            nonmethod_func.func_globals,
1130
 
                            nonmethod_func.func_name,
1131
 
                            nonmethod_func.func_defaults,
1132
 
                            nonmethod_func.func_closure)
1133
 
                    else:
1134
 
                        new_function = types.FunctionType(
1135
 
                            nonmethod_func.__code__,
1136
 
                            nonmethod_func.__globals__,
1137
 
                            nonmethod_func.__name__,
1138
 
                            nonmethod_func.__defaults__,
1139
 
                            nonmethod_func.__closure__)
1140
 
                    new_function = (dbus.service.signal(
1141
 
                        alt_interface,
1142
 
                        attribute._dbus_signature)(new_function))
1143
 
                    # Copy annotations, if any
1144
 
                    try:
1145
 
                        new_function._dbus_annotations = dict(
1146
 
                            attribute._dbus_annotations)
1147
 
                    except AttributeError:
1148
 
                        pass
1149
 
                    # Define a creator of a function to call both the
1150
 
                    # original and alternate functions, so both the
1151
 
                    # original and alternate signals gets sent when
1152
 
                    # the function is called
1153
 
                    def fixscope(func1, func2):
1154
 
                        """This function is a scope container to pass
1155
 
                        func1 and func2 to the "call_both" function
1156
 
                        outside of its arguments"""
1157
 
                        
1158
 
                        def call_both(*args, **kwargs):
1159
 
                            """This function will emit two D-Bus
1160
 
                            signals by calling func1 and func2"""
1161
 
                            func1(*args, **kwargs)
1162
 
                            func2(*args, **kwargs)
1163
 
                        
1164
 
                        return call_both
1165
 
                    # Create the "call_both" function and add it to
1166
 
                    # the class
1167
 
                    attr[attrname] = fixscope(attribute, new_function)
1168
 
                # Is this a D-Bus method?
1169
 
                elif getattr(attribute, "_dbus_is_method", False):
1170
 
                    # Create a new, but exactly alike, function
1171
 
                    # object.  Decorate it to be a new D-Bus method
1172
 
                    # with the alternate D-Bus interface name.  Add it
1173
 
                    # to the class.
1174
 
                    attr[attrname] = (
1175
 
                        dbus.service.method(
1176
 
                            alt_interface,
1177
 
                            attribute._dbus_in_signature,
1178
 
                            attribute._dbus_out_signature)
1179
 
                        (types.FunctionType(attribute.func_code,
1180
 
                                            attribute.func_globals,
1181
 
                                            attribute.func_name,
1182
 
                                            attribute.func_defaults,
1183
 
                                            attribute.func_closure)))
1184
 
                    # Copy annotations, if any
1185
 
                    try:
1186
 
                        attr[attrname]._dbus_annotations = dict(
1187
 
                            attribute._dbus_annotations)
1188
 
                    except AttributeError:
1189
 
                        pass
1190
 
                # Is this a D-Bus property?
1191
 
                elif getattr(attribute, "_dbus_is_property", False):
1192
 
                    # Create a new, but exactly alike, function
1193
 
                    # object, and decorate it to be a new D-Bus
1194
 
                    # property with the alternate D-Bus interface
1195
 
                    # name.  Add it to the class.
1196
 
                    attr[attrname] = (dbus_service_property(
1197
 
                        alt_interface, attribute._dbus_signature,
1198
 
                        attribute._dbus_access,
1199
 
                        attribute._dbus_get_args_options
1200
 
                        ["byte_arrays"])
1201
 
                                      (types.FunctionType(
1202
 
                                          attribute.func_code,
1203
 
                                          attribute.func_globals,
1204
 
                                          attribute.func_name,
1205
 
                                          attribute.func_defaults,
1206
 
                                          attribute.func_closure)))
1207
 
                    # Copy annotations, if any
1208
 
                    try:
1209
 
                        attr[attrname]._dbus_annotations = dict(
1210
 
                            attribute._dbus_annotations)
1211
 
                    except AttributeError:
1212
 
                        pass
1213
 
                # Is this a D-Bus interface?
1214
 
                elif getattr(attribute, "_dbus_is_interface", False):
1215
 
                    # Create a new, but exactly alike, function
1216
 
                    # object.  Decorate it to be a new D-Bus interface
1217
 
                    # with the alternate D-Bus interface name.  Add it
1218
 
                    # to the class.
1219
 
                    attr[attrname] = (
1220
 
                        dbus_interface_annotations(alt_interface)
1221
 
                        (types.FunctionType(attribute.func_code,
1222
 
                                            attribute.func_globals,
1223
 
                                            attribute.func_name,
1224
 
                                            attribute.func_defaults,
1225
 
                                            attribute.func_closure)))
1226
 
            if deprecate:
1227
 
                # Deprecate all alternate interfaces
1228
 
                iname="_AlternateDBusNames_interface_annotation{}"
1229
 
                for interface_name in interface_names:
1230
 
                    
1231
 
                    @dbus_interface_annotations(interface_name)
1232
 
                    def func(self):
1233
 
                        return { "org.freedesktop.DBus.Deprecated":
1234
 
                                 "true" }
1235
 
                    # Find an unused name
1236
 
                    for aname in (iname.format(i)
1237
 
                                  for i in itertools.count()):
1238
 
                        if aname not in attr:
1239
 
                            attr[aname] = func
1240
 
                            break
1241
 
            if interface_names:
1242
 
                # Replace the class with a new subclass of it with
1243
 
                # methods, signals, etc. as created above.
1244
 
                cls = type(b"{}Alternate".format(cls.__name__),
1245
 
                           (cls, ), attr)
1246
 
        return cls
1247
 
    
1248
 
    return wrapper
1249
 
 
1250
 
 
1251
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1252
 
                            "se.bsnet.fukt.Mandos"})
1253
 
class ClientDBus(Client, DBusObjectWithProperties):
1254
 
    """A Client class using D-Bus
1255
 
    
1256
 
    Attributes:
1257
 
    dbus_object_path: dbus.ObjectPath
1258
 
    bus: dbus.SystemBus()
1259
 
    """
1260
 
    
1261
 
    runtime_expansions = (Client.runtime_expansions
1262
 
                          + ("dbus_object_path", ))
1263
 
    
1264
 
    _interface = "se.recompile.Mandos.Client"
1265
 
    
1266
 
    # dbus.service.Object doesn't use super(), so we can't either.
1267
 
    
1268
 
    def __init__(self, bus = None, *args, **kwargs):
1269
 
        self.bus = bus
1270
 
        Client.__init__(self, *args, **kwargs)
1271
 
        # Only now, when this client is initialized, can it show up on
1272
 
        # the D-Bus
1273
 
        client_object_name = str(self.name).translate(
1274
 
            {ord("."): ord("_"),
1275
 
             ord("-"): ord("_")})
1276
 
        self.dbus_object_path = dbus.ObjectPath(
1277
 
            "/clients/" + client_object_name)
1278
 
        DBusObjectWithProperties.__init__(self, self.bus,
1279
 
                                          self.dbus_object_path)
1280
 
    
1281
 
    def notifychangeproperty(transform_func, dbus_name,
1282
 
                             type_func=lambda x: x,
1283
 
                             variant_level=1,
1284
 
                             invalidate_only=False,
1285
 
                             _interface=_interface):
1286
 
        """ Modify a variable so that it's a property which announces
1287
 
        its changes to DBus.
1288
 
        
1289
 
        transform_fun: Function that takes a value and a variant_level
1290
 
                       and transforms it to a D-Bus type.
1291
 
        dbus_name: D-Bus name of the variable
1292
 
        type_func: Function that transform the value before sending it
1293
 
                   to the D-Bus.  Default: no transform
1294
 
        variant_level: D-Bus variant level.  Default: 1
1295
 
        """
1296
 
        attrname = "_{}".format(dbus_name)
1297
 
        
1298
 
        def setter(self, value):
1299
 
            if hasattr(self, "dbus_object_path"):
1300
 
                if (not hasattr(self, attrname) or
1301
 
                    type_func(getattr(self, attrname, None))
1302
 
                    != type_func(value)):
1303
 
                    if invalidate_only:
1304
 
                        self.PropertiesChanged(
1305
 
                            _interface, dbus.Dictionary(),
1306
 
                            dbus.Array((dbus_name, )))
1307
 
                    else:
1308
 
                        dbus_value = transform_func(
1309
 
                            type_func(value),
1310
 
                            variant_level = variant_level)
1311
 
                        self.PropertyChanged(dbus.String(dbus_name),
1312
 
                                             dbus_value)
1313
 
                        self.PropertiesChanged(
1314
 
                            _interface,
1315
 
                            dbus.Dictionary({ dbus.String(dbus_name):
1316
 
                                              dbus_value }),
1317
 
                            dbus.Array())
1318
 
            setattr(self, attrname, value)
1319
 
        
1320
 
        return property(lambda self: getattr(self, attrname), setter)
1321
 
    
1322
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1323
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1324
 
                                             "ApprovalPending",
1325
 
                                             type_func = bool)
1326
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1327
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1328
 
                                        "LastEnabled")
1329
 
    checker = notifychangeproperty(
1330
 
        dbus.Boolean, "CheckerRunning",
1331
 
        type_func = lambda checker: checker is not None)
1332
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1333
 
                                           "LastCheckedOK")
1334
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1335
 
                                               "LastCheckerStatus")
1336
 
    last_approval_request = notifychangeproperty(
1337
 
        datetime_to_dbus, "LastApprovalRequest")
1338
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1339
 
                                               "ApprovedByDefault")
1340
 
    approval_delay = notifychangeproperty(
1341
 
        dbus.UInt64, "ApprovalDelay",
1342
 
        type_func = lambda td: td.total_seconds() * 1000)
1343
 
    approval_duration = notifychangeproperty(
1344
 
        dbus.UInt64, "ApprovalDuration",
1345
 
        type_func = lambda td: td.total_seconds() * 1000)
1346
 
    host = notifychangeproperty(dbus.String, "Host")
1347
 
    timeout = notifychangeproperty(
1348
 
        dbus.UInt64, "Timeout",
1349
 
        type_func = lambda td: td.total_seconds() * 1000)
1350
 
    extended_timeout = notifychangeproperty(
1351
 
        dbus.UInt64, "ExtendedTimeout",
1352
 
        type_func = lambda td: td.total_seconds() * 1000)
1353
 
    interval = notifychangeproperty(
1354
 
        dbus.UInt64, "Interval",
1355
 
        type_func = lambda td: td.total_seconds() * 1000)
1356
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1357
 
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
1358
 
                                  invalidate_only=True)
1359
 
    
1360
 
    del notifychangeproperty
1361
 
    
1362
 
    def __del__(self, *args, **kwargs):
1363
 
        try:
1364
 
            self.remove_from_connection()
1365
 
        except LookupError:
1366
 
            pass
1367
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1368
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1369
 
        Client.__del__(self, *args, **kwargs)
1370
 
    
1371
 
    def checker_callback(self, pid, condition, command,
1372
 
                         *args, **kwargs):
1373
 
        self.checker_callback_tag = None
1374
 
        self.checker = None
1375
 
        if os.WIFEXITED(condition):
1376
 
            exitstatus = os.WEXITSTATUS(condition)
1377
 
            # Emit D-Bus signal
1378
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1379
 
                                  dbus.Int64(condition),
1380
 
                                  dbus.String(command))
1381
 
        else:
1382
 
            # Emit D-Bus signal
1383
 
            self.CheckerCompleted(dbus.Int16(-1),
1384
 
                                  dbus.Int64(condition),
1385
 
                                  dbus.String(command))
1386
 
        
1387
 
        return Client.checker_callback(self, pid, condition, command,
1388
 
                                       *args, **kwargs)
1389
 
    
1390
 
    def start_checker(self, *args, **kwargs):
1391
 
        old_checker_pid = getattr(self.checker, "pid", None)
1392
 
        r = Client.start_checker(self, *args, **kwargs)
1393
 
        # Only if new checker process was started
1394
 
        if (self.checker is not None
1395
 
            and old_checker_pid != self.checker.pid):
1396
 
            # Emit D-Bus signal
1397
 
            self.CheckerStarted(self.current_checker_command)
1398
 
        return r
1399
 
    
1400
 
    def _reset_approved(self):
1401
 
        self.approved = None
1402
 
        return False
1403
 
    
1404
 
    def approve(self, value=True):
1405
 
        self.approved = value
1406
 
        gobject.timeout_add(int(self.approval_duration.total_seconds()
1407
 
                                * 1000), self._reset_approved)
1408
 
        self.send_changedstate()
1409
 
    
1410
 
    ## D-Bus methods, signals & properties
1411
 
    
1412
 
    ## Interfaces
1413
 
    
1414
 
    ## Signals
1415
 
    
1416
 
    # CheckerCompleted - signal
1417
 
    @dbus.service.signal(_interface, signature="nxs")
1418
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1419
 
        "D-Bus signal"
1420
 
        pass
1421
 
    
1422
 
    # CheckerStarted - signal
1423
 
    @dbus.service.signal(_interface, signature="s")
1424
 
    def CheckerStarted(self, command):
1425
 
        "D-Bus signal"
1426
 
        pass
1427
 
    
1428
 
    # PropertyChanged - signal
1429
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1430
 
    @dbus.service.signal(_interface, signature="sv")
1431
 
    def PropertyChanged(self, property, value):
1432
 
        "D-Bus signal"
1433
 
        pass
1434
 
    
1435
 
    # GotSecret - signal
1436
 
    @dbus.service.signal(_interface)
1437
 
    def GotSecret(self):
1438
 
        """D-Bus signal
1439
 
        Is sent after a successful transfer of secret from the Mandos
1440
 
        server to mandos-client
1441
 
        """
1442
 
        pass
1443
 
    
1444
 
    # Rejected - signal
1445
 
    @dbus.service.signal(_interface, signature="s")
1446
 
    def Rejected(self, reason):
1447
 
        "D-Bus signal"
1448
 
        pass
1449
 
    
1450
 
    # NeedApproval - signal
1451
 
    @dbus.service.signal(_interface, signature="tb")
1452
 
    def NeedApproval(self, timeout, default):
1453
 
        "D-Bus signal"
1454
 
        return self.need_approval()
1455
 
    
1456
 
    ## Methods
1457
 
    
1458
 
    # Approve - method
1459
 
    @dbus.service.method(_interface, in_signature="b")
1460
 
    def Approve(self, value):
1461
 
        self.approve(value)
1462
 
    
1463
 
    # CheckedOK - method
1464
 
    @dbus.service.method(_interface)
1465
 
    def CheckedOK(self):
1466
 
        self.checked_ok()
1467
 
    
1468
 
    # Enable - method
1469
 
    @dbus.service.method(_interface)
1470
 
    def Enable(self):
1471
 
        "D-Bus method"
1472
 
        self.enable()
1473
 
    
1474
 
    # StartChecker - method
1475
 
    @dbus.service.method(_interface)
1476
 
    def StartChecker(self):
1477
 
        "D-Bus method"
1478
 
        self.start_checker()
1479
 
    
1480
 
    # Disable - method
1481
 
    @dbus.service.method(_interface)
1482
 
    def Disable(self):
1483
 
        "D-Bus method"
1484
 
        self.disable()
1485
 
    
1486
 
    # StopChecker - method
1487
 
    @dbus.service.method(_interface)
1488
 
    def StopChecker(self):
1489
 
        self.stop_checker()
1490
 
    
1491
 
    ## Properties
1492
 
    
1493
 
    # ApprovalPending - property
1494
 
    @dbus_service_property(_interface, signature="b", access="read")
1495
 
    def ApprovalPending_dbus_property(self):
1496
 
        return dbus.Boolean(bool(self.approvals_pending))
1497
 
    
1498
 
    # ApprovedByDefault - property
1499
 
    @dbus_service_property(_interface,
1500
 
                           signature="b",
1501
 
                           access="readwrite")
1502
 
    def ApprovedByDefault_dbus_property(self, value=None):
1503
 
        if value is None:       # get
1504
 
            return dbus.Boolean(self.approved_by_default)
1505
 
        self.approved_by_default = bool(value)
1506
 
    
1507
 
    # ApprovalDelay - property
1508
 
    @dbus_service_property(_interface,
1509
 
                           signature="t",
1510
 
                           access="readwrite")
1511
 
    def ApprovalDelay_dbus_property(self, value=None):
1512
 
        if value is None:       # get
1513
 
            return dbus.UInt64(self.approval_delay.total_seconds()
1514
 
                               * 1000)
1515
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1516
 
    
1517
 
    # ApprovalDuration - property
1518
 
    @dbus_service_property(_interface,
1519
 
                           signature="t",
1520
 
                           access="readwrite")
1521
 
    def ApprovalDuration_dbus_property(self, value=None):
1522
 
        if value is None:       # get
1523
 
            return dbus.UInt64(self.approval_duration.total_seconds()
1524
 
                               * 1000)
1525
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1526
 
    
1527
 
    # Name - property
1528
 
    @dbus_service_property(_interface, signature="s", access="read")
1529
 
    def Name_dbus_property(self):
1530
 
        return dbus.String(self.name)
1531
 
    
1532
 
    # Fingerprint - property
1533
 
    @dbus_service_property(_interface, signature="s", access="read")
1534
 
    def Fingerprint_dbus_property(self):
1535
 
        return dbus.String(self.fingerprint)
1536
 
    
1537
 
    # Host - property
1538
 
    @dbus_service_property(_interface,
1539
 
                           signature="s",
1540
 
                           access="readwrite")
1541
 
    def Host_dbus_property(self, value=None):
1542
 
        if value is None:       # get
1543
 
            return dbus.String(self.host)
1544
 
        self.host = str(value)
1545
 
    
1546
 
    # Created - property
1547
 
    @dbus_service_property(_interface, signature="s", access="read")
1548
 
    def Created_dbus_property(self):
1549
 
        return datetime_to_dbus(self.created)
1550
 
    
1551
 
    # LastEnabled - property
1552
 
    @dbus_service_property(_interface, signature="s", access="read")
1553
 
    def LastEnabled_dbus_property(self):
1554
 
        return datetime_to_dbus(self.last_enabled)
1555
 
    
1556
 
    # Enabled - property
1557
 
    @dbus_service_property(_interface,
1558
 
                           signature="b",
1559
 
                           access="readwrite")
1560
 
    def Enabled_dbus_property(self, value=None):
1561
 
        if value is None:       # get
1562
 
            return dbus.Boolean(self.enabled)
1563
 
        if value:
1564
 
            self.enable()
1565
 
        else:
1566
 
            self.disable()
1567
 
    
1568
 
    # LastCheckedOK - property
1569
 
    @dbus_service_property(_interface,
1570
 
                           signature="s",
1571
 
                           access="readwrite")
1572
 
    def LastCheckedOK_dbus_property(self, value=None):
1573
 
        if value is not None:
1574
 
            self.checked_ok()
1575
 
            return
1576
 
        return datetime_to_dbus(self.last_checked_ok)
1577
 
    
1578
 
    # LastCheckerStatus - property
1579
 
    @dbus_service_property(_interface, signature="n", access="read")
1580
 
    def LastCheckerStatus_dbus_property(self):
1581
 
        return dbus.Int16(self.last_checker_status)
1582
 
    
1583
 
    # Expires - property
1584
 
    @dbus_service_property(_interface, signature="s", access="read")
1585
 
    def Expires_dbus_property(self):
1586
 
        return datetime_to_dbus(self.expires)
1587
 
    
1588
 
    # LastApprovalRequest - property
1589
 
    @dbus_service_property(_interface, signature="s", access="read")
1590
 
    def LastApprovalRequest_dbus_property(self):
1591
 
        return datetime_to_dbus(self.last_approval_request)
1592
 
    
1593
 
    # Timeout - property
1594
 
    @dbus_service_property(_interface,
1595
 
                           signature="t",
1596
 
                           access="readwrite")
1597
 
    def Timeout_dbus_property(self, value=None):
1598
 
        if value is None:       # get
1599
 
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
1600
 
        old_timeout = self.timeout
1601
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1602
 
        # Reschedule disabling
1603
 
        if self.enabled:
1604
 
            now = datetime.datetime.utcnow()
1605
 
            self.expires += self.timeout - old_timeout
1606
 
            if self.expires <= now:
1607
 
                # The timeout has passed
1608
 
                self.disable()
1609
 
            else:
1610
 
                if (getattr(self, "disable_initiator_tag", None)
1611
 
                    is None):
1612
 
                    return
1613
 
                gobject.source_remove(self.disable_initiator_tag)
1614
 
                self.disable_initiator_tag = gobject.timeout_add(
1615
 
                    int((self.expires - now).total_seconds() * 1000),
1616
 
                    self.disable)
1617
 
    
1618
 
    # ExtendedTimeout - property
1619
 
    @dbus_service_property(_interface,
1620
 
                           signature="t",
1621
 
                           access="readwrite")
1622
 
    def ExtendedTimeout_dbus_property(self, value=None):
1623
 
        if value is None:       # get
1624
 
            return dbus.UInt64(self.extended_timeout.total_seconds()
1625
 
                               * 1000)
1626
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1627
 
    
1628
 
    # Interval - property
1629
 
    @dbus_service_property(_interface,
1630
 
                           signature="t",
1631
 
                           access="readwrite")
1632
 
    def Interval_dbus_property(self, value=None):
1633
 
        if value is None:       # get
1634
 
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1635
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1636
 
        if getattr(self, "checker_initiator_tag", None) is None:
1637
 
            return
1638
 
        if self.enabled:
1639
 
            # Reschedule checker run
1640
 
            gobject.source_remove(self.checker_initiator_tag)
1641
 
            self.checker_initiator_tag = gobject.timeout_add(
1642
 
                value, self.start_checker)
1643
 
            self.start_checker() # Start one now, too
1644
 
    
1645
 
    # Checker - property
1646
 
    @dbus_service_property(_interface,
1647
 
                           signature="s",
1648
 
                           access="readwrite")
1649
 
    def Checker_dbus_property(self, value=None):
1650
 
        if value is None:       # get
1651
 
            return dbus.String(self.checker_command)
1652
 
        self.checker_command = str(value)
1653
 
    
1654
 
    # CheckerRunning - property
1655
 
    @dbus_service_property(_interface,
1656
 
                           signature="b",
1657
 
                           access="readwrite")
1658
 
    def CheckerRunning_dbus_property(self, value=None):
1659
 
        if value is None:       # get
1660
 
            return dbus.Boolean(self.checker is not None)
1661
 
        if value:
1662
 
            self.start_checker()
1663
 
        else:
1664
 
            self.stop_checker()
1665
 
    
1666
 
    # ObjectPath - property
1667
 
    @dbus_service_property(_interface, signature="o", access="read")
1668
 
    def ObjectPath_dbus_property(self):
1669
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1670
 
    
1671
 
    # Secret = property
1672
 
    @dbus_service_property(_interface,
1673
 
                           signature="ay",
1674
 
                           access="write",
1675
 
                           byte_arrays=True)
1676
 
    def Secret_dbus_property(self, value):
1677
 
        self.secret = bytes(value)
1678
 
    
1679
 
    del _interface
1680
 
 
1681
 
 
1682
 
class ProxyClient(object):
1683
 
    def __init__(self, child_pipe, fpr, address):
1684
 
        self._pipe = child_pipe
1685
 
        self._pipe.send(('init', fpr, address))
1686
 
        if not self._pipe.recv():
1687
 
            raise KeyError(fpr)
1688
 
    
1689
 
    def __getattribute__(self, name):
1690
 
        if name == '_pipe':
1691
 
            return super(ProxyClient, self).__getattribute__(name)
1692
 
        self._pipe.send(('getattr', name))
1693
 
        data = self._pipe.recv()
1694
 
        if data[0] == 'data':
1695
 
            return data[1]
1696
 
        if data[0] == 'function':
1697
 
            
1698
 
            def func(*args, **kwargs):
1699
 
                self._pipe.send(('funcall', name, args, kwargs))
1700
 
                return self._pipe.recv()[1]
1701
 
            
1702
 
            return func
1703
 
    
1704
 
    def __setattr__(self, name, value):
1705
 
        if name == '_pipe':
1706
 
            return super(ProxyClient, self).__setattr__(name, value)
1707
 
        self._pipe.send(('setattr', name, value))
1708
 
 
1709
 
 
1710
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1711
 
    """A class to handle client connections.
1712
 
    
1713
 
    Instantiated once for each connection to handle it.
1714
 
    Note: This will run in its own forked process."""
1715
 
    
1716
 
    def handle(self):
1717
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1718
 
            logger.info("TCP connection from: %s",
1719
 
                        str(self.client_address))
1720
 
            logger.debug("Pipe FD: %d",
1721
 
                         self.server.child_pipe.fileno())
1722
 
            
1723
 
            session = gnutls.connection.ClientSession(
1724
 
                self.request, gnutls.connection .X509Credentials())
1725
 
            
1726
 
            # Note: gnutls.connection.X509Credentials is really a
1727
 
            # generic GnuTLS certificate credentials object so long as
1728
 
            # no X.509 keys are added to it.  Therefore, we can use it
1729
 
            # here despite using OpenPGP certificates.
1730
 
            
1731
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1732
 
            #                      "+AES-256-CBC", "+SHA1",
1733
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1734
 
            #                      "+DHE-DSS"))
1735
 
            # Use a fallback default, since this MUST be set.
1736
 
            priority = self.server.gnutls_priority
1737
 
            if priority is None:
1738
 
                priority = "NORMAL"
1739
 
            gnutls.library.functions.gnutls_priority_set_direct(
1740
 
                session._c_object, priority, None)
1741
 
            
1742
 
            # Start communication using the Mandos protocol
1743
 
            # Get protocol number
1744
 
            line = self.request.makefile().readline()
1745
 
            logger.debug("Protocol version: %r", line)
1746
 
            try:
1747
 
                if int(line.strip().split()[0]) > 1:
1748
 
                    raise RuntimeError(line)
1749
 
            except (ValueError, IndexError, RuntimeError) as error:
1750
 
                logger.error("Unknown protocol version: %s", error)
1751
 
                return
1752
 
            
1753
 
            # Start GnuTLS connection
1754
 
            try:
1755
 
                session.handshake()
1756
 
            except gnutls.errors.GNUTLSError as error:
1757
 
                logger.warning("Handshake failed: %s", error)
1758
 
                # Do not run session.bye() here: the session is not
1759
 
                # established.  Just abandon the request.
1760
 
                return
1761
 
            logger.debug("Handshake succeeded")
1762
 
            
1763
 
            approval_required = False
1764
 
            try:
1765
 
                try:
1766
 
                    fpr = self.fingerprint(
1767
 
                        self.peer_certificate(session))
1768
 
                except (TypeError,
1769
 
                        gnutls.errors.GNUTLSError) as error:
1770
 
                    logger.warning("Bad certificate: %s", error)
1771
 
                    return
1772
 
                logger.debug("Fingerprint: %s", fpr)
1773
 
                
1774
 
                try:
1775
 
                    client = ProxyClient(child_pipe, fpr,
1776
 
                                         self.client_address)
1777
 
                except KeyError:
1778
 
                    return
1779
 
                
1780
 
                if client.approval_delay:
1781
 
                    delay = client.approval_delay
1782
 
                    client.approvals_pending += 1
1783
 
                    approval_required = True
1784
 
                
1785
 
                while True:
1786
 
                    if not client.enabled:
1787
 
                        logger.info("Client %s is disabled",
1788
 
                                    client.name)
1789
 
                        if self.server.use_dbus:
1790
 
                            # Emit D-Bus signal
1791
 
                            client.Rejected("Disabled")
1792
 
                        return
1793
 
                    
1794
 
                    if client.approved or not client.approval_delay:
1795
 
                        #We are approved or approval is disabled
1796
 
                        break
1797
 
                    elif client.approved is None:
1798
 
                        logger.info("Client %s needs approval",
1799
 
                                    client.name)
1800
 
                        if self.server.use_dbus:
1801
 
                            # Emit D-Bus signal
1802
 
                            client.NeedApproval(
1803
 
                                client.approval_delay.total_seconds()
1804
 
                                * 1000, client.approved_by_default)
1805
 
                    else:
1806
 
                        logger.warning("Client %s was not approved",
1807
 
                                       client.name)
1808
 
                        if self.server.use_dbus:
1809
 
                            # Emit D-Bus signal
1810
 
                            client.Rejected("Denied")
1811
 
                        return
1812
 
                    
1813
 
                    #wait until timeout or approved
1814
 
                    time = datetime.datetime.now()
1815
 
                    client.changedstate.acquire()
1816
 
                    client.changedstate.wait(delay.total_seconds())
1817
 
                    client.changedstate.release()
1818
 
                    time2 = datetime.datetime.now()
1819
 
                    if (time2 - time) >= delay:
1820
 
                        if not client.approved_by_default:
1821
 
                            logger.warning("Client %s timed out while"
1822
 
                                           " waiting for approval",
1823
 
                                           client.name)
1824
 
                            if self.server.use_dbus:
1825
 
                                # Emit D-Bus signal
1826
 
                                client.Rejected("Approval timed out")
1827
 
                            return
1828
 
                        else:
1829
 
                            break
1830
 
                    else:
1831
 
                        delay -= time2 - time
1832
 
                
1833
 
                sent_size = 0
1834
 
                while sent_size < len(client.secret):
1835
 
                    try:
1836
 
                        sent = session.send(client.secret[sent_size:])
1837
 
                    except gnutls.errors.GNUTLSError as error:
1838
 
                        logger.warning("gnutls send failed",
1839
 
                                       exc_info=error)
1840
 
                        return
1841
 
                    logger.debug("Sent: %d, remaining: %d", sent,
1842
 
                                 len(client.secret) - (sent_size
1843
 
                                                       + sent))
1844
 
                    sent_size += sent
1845
 
                
1846
 
                logger.info("Sending secret to %s", client.name)
1847
 
                # bump the timeout using extended_timeout
1848
 
                client.bump_timeout(client.extended_timeout)
1849
 
                if self.server.use_dbus:
1850
 
                    # Emit D-Bus signal
1851
 
                    client.GotSecret()
1852
 
            
1853
 
            finally:
1854
 
                if approval_required:
1855
 
                    client.approvals_pending -= 1
1856
 
                try:
1857
 
                    session.bye()
1858
 
                except gnutls.errors.GNUTLSError as error:
1859
 
                    logger.warning("GnuTLS bye failed",
1860
 
                                   exc_info=error)
1861
 
    
1862
 
    @staticmethod
1863
 
    def peer_certificate(session):
1864
 
        "Return the peer's OpenPGP certificate as a bytestring"
1865
 
        # If not an OpenPGP certificate...
1866
 
        if (gnutls.library.functions.gnutls_certificate_type_get(
1867
 
                session._c_object)
1868
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1869
 
            # ...do the normal thing
1870
 
            return session.peer_certificate
1871
 
        list_size = ctypes.c_uint(1)
1872
 
        cert_list = (gnutls.library.functions
1873
 
                     .gnutls_certificate_get_peers
1874
 
                     (session._c_object, ctypes.byref(list_size)))
1875
 
        if not bool(cert_list) and list_size.value != 0:
1876
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1877
 
                                            " certificate")
1878
 
        if list_size.value == 0:
1879
 
            return None
1880
 
        cert = cert_list[0]
1881
 
        return ctypes.string_at(cert.data, cert.size)
1882
 
    
1883
 
    @staticmethod
1884
 
    def fingerprint(openpgp):
1885
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1886
 
        # New GnuTLS "datum" with the OpenPGP public key
1887
 
        datum = gnutls.library.types.gnutls_datum_t(
1888
 
            ctypes.cast(ctypes.c_char_p(openpgp),
1889
 
                        ctypes.POINTER(ctypes.c_ubyte)),
1890
 
            ctypes.c_uint(len(openpgp)))
1891
 
        # New empty GnuTLS certificate
1892
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1893
 
        gnutls.library.functions.gnutls_openpgp_crt_init(
1894
 
            ctypes.byref(crt))
1895
 
        # Import the OpenPGP public key into the certificate
1896
 
        gnutls.library.functions.gnutls_openpgp_crt_import(
1897
 
            crt, ctypes.byref(datum),
1898
 
            gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1899
 
        # Verify the self signature in the key
1900
 
        crtverify = ctypes.c_uint()
1901
 
        gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1902
 
            crt, 0, ctypes.byref(crtverify))
1903
 
        if crtverify.value != 0:
1904
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1905
 
            raise gnutls.errors.CertificateSecurityError(
1906
 
                "Verify failed")
1907
 
        # New buffer for the fingerprint
1908
 
        buf = ctypes.create_string_buffer(20)
1909
 
        buf_len = ctypes.c_size_t()
1910
 
        # Get the fingerprint from the certificate into the buffer
1911
 
        gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1912
 
            crt, ctypes.byref(buf), ctypes.byref(buf_len))
1913
 
        # Deinit the certificate
1914
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1915
 
        # Convert the buffer to a Python bytestring
1916
 
        fpr = ctypes.string_at(buf, buf_len.value)
1917
 
        # Convert the bytestring to hexadecimal notation
1918
 
        hex_fpr = binascii.hexlify(fpr).upper()
1919
 
        return hex_fpr
1920
 
 
1921
 
 
1922
 
class MultiprocessingMixIn(object):
1923
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1924
 
    
1925
 
    def sub_process_main(self, request, address):
1926
 
        try:
1927
 
            self.finish_request(request, address)
1928
 
        except Exception:
1929
 
            self.handle_error(request, address)
1930
 
        self.close_request(request)
1931
 
    
1932
 
    def process_request(self, request, address):
1933
 
        """Start a new process to process the request."""
1934
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1935
 
                                       args = (request, address))
1936
 
        proc.start()
1937
 
        return proc
1938
 
 
1939
 
 
1940
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1941
 
    """ adds a pipe to the MixIn """
1942
 
    
1943
 
    def process_request(self, request, client_address):
1944
 
        """Overrides and wraps the original process_request().
1945
 
        
1946
 
        This function creates a new pipe in self.pipe
1947
 
        """
1948
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1949
 
        
1950
 
        proc = MultiprocessingMixIn.process_request(self, request,
1951
 
                                                    client_address)
1952
 
        self.child_pipe.close()
1953
 
        self.add_pipe(parent_pipe, proc)
1954
 
    
1955
 
    def add_pipe(self, parent_pipe, proc):
1956
 
        """Dummy function; override as necessary"""
1957
 
        raise NotImplementedError()
1958
 
 
1959
 
 
1960
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1961
 
                     socketserver.TCPServer, object):
1962
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1963
 
    
1964
 
    Attributes:
1965
 
        enabled:        Boolean; whether this server is activated yet
1966
 
        interface:      None or a network interface name (string)
1967
 
        use_ipv6:       Boolean; to use IPv6 or not
1968
 
    """
1969
 
    
1970
 
    def __init__(self, server_address, RequestHandlerClass,
1971
 
                 interface=None,
1972
 
                 use_ipv6=True,
1973
 
                 socketfd=None):
1974
 
        """If socketfd is set, use that file descriptor instead of
1975
 
        creating a new one with socket.socket().
1976
 
        """
1977
 
        self.interface = interface
1978
 
        if use_ipv6:
1979
 
            self.address_family = socket.AF_INET6
1980
 
        if socketfd is not None:
1981
 
            # Save the file descriptor
1982
 
            self.socketfd = socketfd
1983
 
            # Save the original socket.socket() function
1984
 
            self.socket_socket = socket.socket
1985
 
            # To implement --socket, we monkey patch socket.socket.
1986
 
            # 
1987
 
            # (When socketserver.TCPServer is a new-style class, we
1988
 
            # could make self.socket into a property instead of monkey
1989
 
            # patching socket.socket.)
1990
 
            # 
1991
 
            # Create a one-time-only replacement for socket.socket()
1992
 
            @functools.wraps(socket.socket)
1993
 
            def socket_wrapper(*args, **kwargs):
1994
 
                # Restore original function so subsequent calls are
1995
 
                # not affected.
1996
 
                socket.socket = self.socket_socket
1997
 
                del self.socket_socket
1998
 
                # This time only, return a new socket object from the
1999
 
                # saved file descriptor.
2000
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
2001
 
            # Replace socket.socket() function with wrapper
2002
 
            socket.socket = socket_wrapper
2003
 
        # The socketserver.TCPServer.__init__ will call
2004
 
        # socket.socket(), which might be our replacement,
2005
 
        # socket_wrapper(), if socketfd was set.
2006
 
        socketserver.TCPServer.__init__(self, server_address,
2007
 
                                        RequestHandlerClass)
2008
 
    
2009
 
    def server_bind(self):
2010
 
        """This overrides the normal server_bind() function
2011
 
        to bind to an interface if one was specified, and also NOT to
2012
 
        bind to an address or port if they were not specified."""
2013
 
        if self.interface is not None:
2014
 
            if SO_BINDTODEVICE is None:
2015
 
                logger.error("SO_BINDTODEVICE does not exist;"
2016
 
                             " cannot bind to interface %s",
2017
 
                             self.interface)
2018
 
            else:
2019
 
                try:
2020
 
                    self.socket.setsockopt(
2021
 
                        socket.SOL_SOCKET, SO_BINDTODEVICE,
2022
 
                        (self.interface + "\0").encode("utf-8"))
2023
 
                except socket.error as error:
2024
 
                    if error.errno == errno.EPERM:
2025
 
                        logger.error("No permission to bind to"
2026
 
                                     " interface %s", self.interface)
2027
 
                    elif error.errno == errno.ENOPROTOOPT:
2028
 
                        logger.error("SO_BINDTODEVICE not available;"
2029
 
                                     " cannot bind to interface %s",
2030
 
                                     self.interface)
2031
 
                    elif error.errno == errno.ENODEV:
2032
 
                        logger.error("Interface %s does not exist,"
2033
 
                                     " cannot bind", self.interface)
2034
 
                    else:
2035
 
                        raise
2036
 
        # Only bind(2) the socket if we really need to.
2037
 
        if self.server_address[0] or self.server_address[1]:
2038
 
            if not self.server_address[0]:
2039
 
                if self.address_family == socket.AF_INET6:
2040
 
                    any_address = "::" # in6addr_any
2041
 
                else:
2042
 
                    any_address = "0.0.0.0" # INADDR_ANY
2043
 
                self.server_address = (any_address,
2044
 
                                       self.server_address[1])
2045
 
            elif not self.server_address[1]:
2046
 
                self.server_address = (self.server_address[0], 0)
2047
 
#                 if self.interface:
2048
 
#                     self.server_address = (self.server_address[0],
2049
 
#                                            0, # port
2050
 
#                                            0, # flowinfo
2051
 
#                                            if_nametoindex
2052
 
#                                            (self.interface))
2053
 
            return socketserver.TCPServer.server_bind(self)
2054
 
 
2055
 
 
2056
 
class MandosServer(IPv6_TCPServer):
2057
 
    """Mandos server.
2058
 
    
2059
 
    Attributes:
2060
 
        clients:        set of Client objects
2061
 
        gnutls_priority GnuTLS priority string
2062
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2063
 
    
2064
 
    Assumes a gobject.MainLoop event loop.
2065
 
    """
2066
 
    
2067
 
    def __init__(self, server_address, RequestHandlerClass,
2068
 
                 interface=None,
2069
 
                 use_ipv6=True,
2070
 
                 clients=None,
2071
 
                 gnutls_priority=None,
2072
 
                 use_dbus=True,
2073
 
                 socketfd=None):
2074
 
        self.enabled = False
2075
 
        self.clients = clients
2076
 
        if self.clients is None:
2077
 
            self.clients = {}
2078
 
        self.use_dbus = use_dbus
2079
 
        self.gnutls_priority = gnutls_priority
2080
 
        IPv6_TCPServer.__init__(self, server_address,
2081
 
                                RequestHandlerClass,
2082
 
                                interface = interface,
2083
 
                                use_ipv6 = use_ipv6,
2084
 
                                socketfd = socketfd)
2085
 
    
2086
 
    def server_activate(self):
2087
 
        if self.enabled:
2088
 
            return socketserver.TCPServer.server_activate(self)
2089
 
    
2090
 
    def enable(self):
2091
 
        self.enabled = True
2092
 
    
2093
 
    def add_pipe(self, parent_pipe, proc):
2094
 
        # Call "handle_ipc" for both data and EOF events
2095
 
        gobject.io_add_watch(
2096
 
            parent_pipe.fileno(),
2097
 
            gobject.IO_IN | gobject.IO_HUP,
2098
 
            functools.partial(self.handle_ipc,
2099
 
                              parent_pipe = parent_pipe,
2100
 
                              proc = proc))
2101
 
    
2102
 
    def handle_ipc(self, source, condition,
2103
 
                   parent_pipe=None,
2104
 
                   proc = None,
2105
 
                   client_object=None):
2106
 
        # error, or the other end of multiprocessing.Pipe has closed
2107
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2108
 
            # Wait for other process to exit
2109
 
            proc.join()
2110
 
            return False
2111
 
        
2112
 
        # Read a request from the child
2113
 
        request = parent_pipe.recv()
2114
 
        command = request[0]
2115
 
        
2116
 
        if command == 'init':
2117
 
            fpr = request[1]
2118
 
            address = request[2]
2119
 
            
2120
 
            for c in self.clients.itervalues():
2121
 
                if c.fingerprint == fpr:
2122
 
                    client = c
2123
 
                    break
2124
 
            else:
2125
 
                logger.info("Client not found for fingerprint: %s, ad"
2126
 
                            "dress: %s", fpr, address)
2127
 
                if self.use_dbus:
2128
 
                    # Emit D-Bus signal
2129
 
                    mandos_dbus_service.ClientNotFound(fpr,
2130
 
                                                       address[0])
2131
 
                parent_pipe.send(False)
2132
 
                return False
2133
 
            
2134
 
            gobject.io_add_watch(
2135
 
                parent_pipe.fileno(),
2136
 
                gobject.IO_IN | gobject.IO_HUP,
2137
 
                functools.partial(self.handle_ipc,
2138
 
                                  parent_pipe = parent_pipe,
2139
 
                                  proc = proc,
2140
 
                                  client_object = client))
2141
 
            parent_pipe.send(True)
2142
 
            # remove the old hook in favor of the new above hook on
2143
 
            # same fileno
2144
 
            return False
2145
 
        if command == 'funcall':
2146
 
            funcname = request[1]
2147
 
            args = request[2]
2148
 
            kwargs = request[3]
2149
 
            
2150
 
            parent_pipe.send(('data', getattr(client_object,
2151
 
                                              funcname)(*args,
2152
 
                                                        **kwargs)))
2153
 
        
2154
 
        if command == 'getattr':
2155
 
            attrname = request[1]
2156
 
            if isinstance(client_object.__getattribute__(attrname),
2157
 
                          collections.Callable):
2158
 
                parent_pipe.send(('function', ))
2159
 
            else:
2160
 
                parent_pipe.send((
2161
 
                    'data', client_object.__getattribute__(attrname)))
2162
 
        
2163
 
        if command == 'setattr':
2164
 
            attrname = request[1]
2165
 
            value = request[2]
2166
 
            setattr(client_object, attrname, value)
2167
 
        
2168
 
        return True
2169
 
 
2170
 
 
2171
 
def rfc3339_duration_to_delta(duration):
2172
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2173
 
    
2174
 
    >>> rfc3339_duration_to_delta("P7D")
2175
 
    datetime.timedelta(7)
2176
 
    >>> rfc3339_duration_to_delta("PT60S")
2177
 
    datetime.timedelta(0, 60)
2178
 
    >>> rfc3339_duration_to_delta("PT60M")
2179
 
    datetime.timedelta(0, 3600)
2180
 
    >>> rfc3339_duration_to_delta("PT24H")
2181
 
    datetime.timedelta(1)
2182
 
    >>> rfc3339_duration_to_delta("P1W")
2183
 
    datetime.timedelta(7)
2184
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2185
 
    datetime.timedelta(0, 330)
2186
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2187
 
    datetime.timedelta(1, 200)
2188
 
    """
2189
 
    
2190
 
    # Parsing an RFC 3339 duration with regular expressions is not
2191
 
    # possible - there would have to be multiple places for the same
2192
 
    # values, like seconds.  The current code, while more esoteric, is
2193
 
    # cleaner without depending on a parsing library.  If Python had a
2194
 
    # built-in library for parsing we would use it, but we'd like to
2195
 
    # avoid excessive use of external libraries.
2196
 
    
2197
 
    # New type for defining tokens, syntax, and semantics all-in-one
2198
 
    Token = collections.namedtuple("Token", (
2199
 
        "regexp",  # To match token; if "value" is not None, must have
2200
 
                   # a "group" containing digits
2201
 
        "value",   # datetime.timedelta or None
2202
 
        "followers"))           # Tokens valid after this token
2203
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2204
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2205
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2206
 
    token_second = Token(re.compile(r"(\d+)S"),
2207
 
                         datetime.timedelta(seconds=1),
2208
 
                         frozenset((token_end, )))
2209
 
    token_minute = Token(re.compile(r"(\d+)M"),
2210
 
                         datetime.timedelta(minutes=1),
2211
 
                         frozenset((token_second, token_end)))
2212
 
    token_hour = Token(re.compile(r"(\d+)H"),
2213
 
                       datetime.timedelta(hours=1),
2214
 
                       frozenset((token_minute, token_end)))
2215
 
    token_time = Token(re.compile(r"T"),
2216
 
                       None,
2217
 
                       frozenset((token_hour, token_minute,
2218
 
                                  token_second)))
2219
 
    token_day = Token(re.compile(r"(\d+)D"),
2220
 
                      datetime.timedelta(days=1),
2221
 
                      frozenset((token_time, token_end)))
2222
 
    token_month = Token(re.compile(r"(\d+)M"),
2223
 
                        datetime.timedelta(weeks=4),
2224
 
                        frozenset((token_day, token_end)))
2225
 
    token_year = Token(re.compile(r"(\d+)Y"),
2226
 
                       datetime.timedelta(weeks=52),
2227
 
                       frozenset((token_month, token_end)))
2228
 
    token_week = Token(re.compile(r"(\d+)W"),
2229
 
                       datetime.timedelta(weeks=1),
2230
 
                       frozenset((token_end, )))
2231
 
    token_duration = Token(re.compile(r"P"), None,
2232
 
                           frozenset((token_year, token_month,
2233
 
                                      token_day, token_time,
2234
 
                                      token_week)))
2235
 
    # Define starting values
2236
 
    value = datetime.timedelta() # Value so far
2237
 
    found_token = None
2238
 
    followers = frozenset((token_duration, )) # Following valid tokens
2239
 
    s = duration                # String left to parse
2240
 
    # Loop until end token is found
2241
 
    while found_token is not token_end:
2242
 
        # Search for any currently valid tokens
2243
 
        for token in followers:
2244
 
            match = token.regexp.match(s)
2245
 
            if match is not None:
2246
 
                # Token found
2247
 
                if token.value is not None:
2248
 
                    # Value found, parse digits
2249
 
                    factor = int(match.group(1), 10)
2250
 
                    # Add to value so far
2251
 
                    value += factor * token.value
2252
 
                # Strip token from string
2253
 
                s = token.regexp.sub("", s, 1)
2254
 
                # Go to found token
2255
 
                found_token = token
2256
 
                # Set valid next tokens
2257
 
                followers = found_token.followers
2258
 
                break
2259
 
        else:
2260
 
            # No currently valid tokens were found
2261
 
            raise ValueError("Invalid RFC 3339 duration: {!r}"
2262
 
                             .format(duration))
2263
 
    # End token found
2264
 
    return value
2265
 
 
 
34
            timeout = options.timeout
 
35
        self.timeout = timeout
 
36
        if interval == -1:
 
37
            interval = options.interval
 
38
        self.interval = interval
 
39
        self.next_check = datetime.datetime.now()
 
40
 
 
41
 
 
42
class server_metaclass(type):
 
43
    "Common behavior for the UDP and TCP server classes"
 
44
    def __new__(cls, name, bases, attrs):
 
45
        attrs["address_family"] = socket.AF_INET6
 
46
        attrs["allow_reuse_address"] = True
 
47
        def server_bind(self):
 
48
            if self.options.interface:
 
49
                if not hasattr(socket, "SO_BINDTODEVICE"):
 
50
                    # From /usr/include/asm-i486/socket.h
 
51
                    socket.SO_BINDTODEVICE = 25
 
52
                try:
 
53
                    self.socket.setsockopt(socket.SOL_SOCKET,
 
54
                                           socket.SO_BINDTODEVICE,
 
55
                                           self.options.interface)
 
56
                except socket.error, error:
 
57
                    if error[0] == errno.EPERM:
 
58
                        print "Warning: No permission to bind to interface", \
 
59
                              self.options.interface
 
60
                    else:
 
61
                        raise error
 
62
            return super(type(self), self).server_bind()
 
63
        attrs["server_bind"] = server_bind
 
64
        def init(self, *args, **kwargs):
 
65
            if "options" in kwargs:
 
66
                self.options = kwargs["options"]
 
67
                del kwargs["options"]
 
68
            if "clients" in kwargs:
 
69
                self.clients = kwargs["clients"]
 
70
                del kwargs["clients"]
 
71
            if "credentials" in kwargs:
 
72
                self.credentials = kwargs["credentials"]
 
73
                del kwargs["credentials"]
 
74
            return super(type(self), self).__init__(*args, **kwargs)
 
75
        attrs["__init__"] = init
 
76
        return type.__new__(cls, name, bases, attrs)
 
77
 
 
78
 
 
79
class udp_handler(SocketServer.DatagramRequestHandler, object):
 
80
    def handle(self):
 
81
        self.wfile.write("Polo")
 
82
        print "UDP request answered"
 
83
 
 
84
 
 
85
class IPv6_UDPServer(SocketServer.UDPServer, object):
 
86
    __metaclass__ = server_metaclass
 
87
    def verify_request(self, request, client_address):
 
88
        print "UDP request came"
 
89
        return request[0] == "Marco"
 
90
 
 
91
 
 
92
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
93
    def handle(self):
 
94
        print "TCP request came"
 
95
        print "Request:", self.request
 
96
        print "Client Address:", self.client_address
 
97
        print "Server:", self.server
 
98
        session = gnutls.connection.ServerSession(self.request,
 
99
                                                  self.server.credentials)
 
100
        session.handshake()
 
101
        if session.peer_certificate:
 
102
            print "DN:", session.peer_certificate.subject
 
103
        try:
 
104
            session.verify_peer()
 
105
        except gnutls.errors.CertificateError, error:
 
106
            print "Verify failed", error
 
107
            session.bye()
 
108
            return
 
109
        try:
 
110
            session.send(dict((client.dn, client.password)
 
111
                              for client in self.server.clients)
 
112
                         [session.peer_certificate.subject])
 
113
        except KeyError:
 
114
            session.send("gazonk")
 
115
            # Log maybe? XXX
 
116
        session.bye()
 
117
 
 
118
 
 
119
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
120
    __metaclass__ = server_metaclass
 
121
    request_queue_size = 1024
 
122
 
 
123
 
 
124
in6addr_any = "::"
 
125
 
 
126
cred = None
2266
127
 
2267
128
def string_to_delta(interval):
2268
129
    """Parse a string and return a datetime.timedelta
2269
 
    
 
130
 
2270
131
    >>> string_to_delta('7d')
2271
132
    datetime.timedelta(7)
2272
133
    >>> string_to_delta('60s')
2275
136
    datetime.timedelta(0, 3600)
2276
137
    >>> string_to_delta('24h')
2277
138
    datetime.timedelta(1)
2278
 
    >>> string_to_delta('1w')
 
139
    >>> string_to_delta(u'1w')
2279
140
    datetime.timedelta(7)
2280
 
    >>> string_to_delta('5m 30s')
2281
 
    datetime.timedelta(0, 330)
2282
141
    """
2283
 
    
2284
142
    try:
2285
 
        return rfc3339_duration_to_delta(interval)
2286
 
    except ValueError:
2287
 
        pass
2288
 
    
2289
 
    timevalue = datetime.timedelta(0)
2290
 
    for s in interval.split():
2291
 
        try:
2292
 
            suffix = s[-1]
2293
 
            value = int(s[:-1])
2294
 
            if suffix == "d":
2295
 
                delta = datetime.timedelta(value)
2296
 
            elif suffix == "s":
2297
 
                delta = datetime.timedelta(0, value)
2298
 
            elif suffix == "m":
2299
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2300
 
            elif suffix == "h":
2301
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2302
 
            elif suffix == "w":
2303
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2304
 
            else:
2305
 
                raise ValueError("Unknown suffix {!r}".format(suffix))
2306
 
        except IndexError as e:
2307
 
            raise ValueError(*(e.args))
2308
 
        timevalue += delta
2309
 
    return timevalue
2310
 
 
2311
 
 
2312
 
def daemon(nochdir = False, noclose = False):
2313
 
    """See daemon(3).  Standard BSD Unix function.
2314
 
    
2315
 
    This should really exist as os.daemon, but it doesn't (yet)."""
2316
 
    if os.fork():
2317
 
        sys.exit()
2318
 
    os.setsid()
2319
 
    if not nochdir:
2320
 
        os.chdir("/")
2321
 
    if os.fork():
2322
 
        sys.exit()
2323
 
    if not noclose:
2324
 
        # Close all standard open file descriptors
2325
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2326
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2327
 
            raise OSError(errno.ENODEV,
2328
 
                          "{} not a character device"
2329
 
                          .format(os.devnull))
2330
 
        os.dup2(null, sys.stdin.fileno())
2331
 
        os.dup2(null, sys.stdout.fileno())
2332
 
        os.dup2(null, sys.stderr.fileno())
2333
 
        if null > 2:
2334
 
            os.close(null)
2335
 
 
 
143
        suffix=unicode(interval[-1])
 
144
        value=int(interval[:-1])
 
145
        if suffix == u"d":
 
146
            delta = datetime.timedelta(value)
 
147
        elif suffix == u"s":
 
148
            delta = datetime.timedelta(0, value)
 
149
        elif suffix == u"m":
 
150
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
151
        elif suffix == u"h":
 
152
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
153
        elif suffix == u"w":
 
154
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
155
        else:
 
156
            raise ValueError
 
157
    except (ValueError, IndexError):
 
158
        raise ValueError
 
159
    return delta
2336
160
 
2337
161
def main():
2338
 
    
2339
 
    ##################################################################
2340
 
    # Parsing of options, both command line and config file
2341
 
    
2342
 
    parser = argparse.ArgumentParser()
2343
 
    parser.add_argument("-v", "--version", action="version",
2344
 
                        version = "%(prog)s {}".format(version),
2345
 
                        help="show version number and exit")
2346
 
    parser.add_argument("-i", "--interface", metavar="IF",
2347
 
                        help="Bind to interface IF")
2348
 
    parser.add_argument("-a", "--address",
2349
 
                        help="Address to listen for requests on")
2350
 
    parser.add_argument("-p", "--port", type=int,
2351
 
                        help="Port number to receive requests on")
2352
 
    parser.add_argument("--check", action="store_true",
2353
 
                        help="Run self-test")
2354
 
    parser.add_argument("--debug", action="store_true",
2355
 
                        help="Debug mode; run in foreground and log"
2356
 
                        " to terminal", default=None)
2357
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2358
 
                        help="Debug level for stdout output")
2359
 
    parser.add_argument("--priority", help="GnuTLS"
2360
 
                        " priority string (see GnuTLS documentation)")
2361
 
    parser.add_argument("--servicename",
2362
 
                        metavar="NAME", help="Zeroconf service name")
2363
 
    parser.add_argument("--configdir",
2364
 
                        default="/etc/mandos", metavar="DIR",
2365
 
                        help="Directory to search for configuration"
2366
 
                        " files")
2367
 
    parser.add_argument("--no-dbus", action="store_false",
2368
 
                        dest="use_dbus", help="Do not provide D-Bus"
2369
 
                        " system bus interface", default=None)
2370
 
    parser.add_argument("--no-ipv6", action="store_false",
2371
 
                        dest="use_ipv6", help="Do not use IPv6",
2372
 
                        default=None)
2373
 
    parser.add_argument("--no-restore", action="store_false",
2374
 
                        dest="restore", help="Do not restore stored"
2375
 
                        " state", default=None)
2376
 
    parser.add_argument("--socket", type=int,
2377
 
                        help="Specify a file descriptor to a network"
2378
 
                        " socket to use instead of creating one")
2379
 
    parser.add_argument("--statedir", metavar="DIR",
2380
 
                        help="Directory to save/restore state in")
2381
 
    parser.add_argument("--foreground", action="store_true",
2382
 
                        help="Run in foreground", default=None)
2383
 
    parser.add_argument("--no-zeroconf", action="store_false",
2384
 
                        dest="zeroconf", help="Do not use Zeroconf",
2385
 
                        default=None)
2386
 
    
2387
 
    options = parser.parse_args()
2388
 
    
 
162
    parser = OptionParser()
 
163
    parser.add_option("-i", "--interface", type="string",
 
164
                      default="eth0", metavar="IF",
 
165
                      help="Interface to bind to")
 
166
    parser.add_option("--cert", type="string", default="cert.pem",
 
167
                      metavar="FILE",
 
168
                      help="Public key certificate to use")
 
169
    parser.add_option("--key", type="string", default="key.pem",
 
170
                      metavar="FILE",
 
171
                      help="Private key to use")
 
172
    parser.add_option("--ca", type="string", default="ca.pem",
 
173
                      metavar="FILE",
 
174
                      help="Certificate Authority certificate to use")
 
175
    parser.add_option("--crl", type="string", default="crl.pem",
 
176
                      metavar="FILE",
 
177
                      help="Certificate Revokation List to use")
 
178
    parser.add_option("-p", "--port", type="int", default=49001,
 
179
                      help="Port number to receive requests on")
 
180
    parser.add_option("--dh", type="int", metavar="BITS",
 
181
                      help="DH group to use")
 
182
    parser.add_option("-t", "--timeout", type="string", # Parsed later
 
183
                      default="15m",
 
184
                      help="Amount of downtime allowed for clients")
 
185
    parser.add_option("--interval", type="string", # Parsed later
 
186
                      default="5m",
 
187
                      help="How often to check that a client is up")
 
188
    parser.add_option("--check", action="store_true", default=False,
 
189
                      help="Run self-test")
 
190
    (options, args) = parser.parse_args()
 
191
 
2389
192
    if options.check:
2390
193
        import doctest
2391
 
        fail_count, test_count = doctest.testmod()
2392
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2393
 
    
2394
 
    # Default values for config file for server-global settings
2395
 
    server_defaults = { "interface": "",
2396
 
                        "address": "",
2397
 
                        "port": "",
2398
 
                        "debug": "False",
2399
 
                        "priority":
2400
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2401
 
                        ":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2402
 
                        "servicename": "Mandos",
2403
 
                        "use_dbus": "True",
2404
 
                        "use_ipv6": "True",
2405
 
                        "debuglevel": "",
2406
 
                        "restore": "True",
2407
 
                        "socket": "",
2408
 
                        "statedir": "/var/lib/mandos",
2409
 
                        "foreground": "False",
2410
 
                        "zeroconf": "True",
2411
 
                    }
2412
 
    
2413
 
    # Parse config file for server-global settings
2414
 
    server_config = configparser.SafeConfigParser(server_defaults)
2415
 
    del server_defaults
2416
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2417
 
    # Convert the SafeConfigParser object to a dict
2418
 
    server_settings = server_config.defaults()
2419
 
    # Use the appropriate methods on the non-string config options
2420
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2421
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2422
 
                                                           option)
2423
 
    if server_settings["port"]:
2424
 
        server_settings["port"] = server_config.getint("DEFAULT",
2425
 
                                                       "port")
2426
 
    if server_settings["socket"]:
2427
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2428
 
                                                         "socket")
2429
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2430
 
        # over with an opened os.devnull.  But we don't want this to
2431
 
        # happen with a supplied network socket.
2432
 
        if 0 <= server_settings["socket"] <= 2:
2433
 
            server_settings["socket"] = os.dup(server_settings
2434
 
                                               ["socket"])
2435
 
    del server_config
2436
 
    
2437
 
    # Override the settings from the config file with command line
2438
 
    # options, if set.
2439
 
    for option in ("interface", "address", "port", "debug",
2440
 
                   "priority", "servicename", "configdir", "use_dbus",
2441
 
                   "use_ipv6", "debuglevel", "restore", "statedir",
2442
 
                   "socket", "foreground", "zeroconf"):
2443
 
        value = getattr(options, option)
2444
 
        if value is not None:
2445
 
            server_settings[option] = value
2446
 
    del options
2447
 
    # Force all strings to be unicode
2448
 
    for option in server_settings.keys():
2449
 
        if isinstance(server_settings[option], bytes):
2450
 
            server_settings[option] = (server_settings[option]
2451
 
                                       .decode("utf-8"))
2452
 
    # Force all boolean options to be boolean
2453
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2454
 
                   "foreground", "zeroconf"):
2455
 
        server_settings[option] = bool(server_settings[option])
2456
 
    # Debug implies foreground
2457
 
    if server_settings["debug"]:
2458
 
        server_settings["foreground"] = True
2459
 
    # Now we have our good server settings in "server_settings"
2460
 
    
2461
 
    ##################################################################
2462
 
    
2463
 
    if (not server_settings["zeroconf"]
2464
 
        and not (server_settings["port"]
2465
 
                 or server_settings["socket"] != "")):
2466
 
        parser.error("Needs port or socket to work without Zeroconf")
2467
 
    
2468
 
    # For convenience
2469
 
    debug = server_settings["debug"]
2470
 
    debuglevel = server_settings["debuglevel"]
2471
 
    use_dbus = server_settings["use_dbus"]
2472
 
    use_ipv6 = server_settings["use_ipv6"]
2473
 
    stored_state_path = os.path.join(server_settings["statedir"],
2474
 
                                     stored_state_file)
2475
 
    foreground = server_settings["foreground"]
2476
 
    zeroconf = server_settings["zeroconf"]
2477
 
    
2478
 
    if debug:
2479
 
        initlogger(debug, logging.DEBUG)
2480
 
    else:
2481
 
        if not debuglevel:
2482
 
            initlogger(debug)
2483
 
        else:
2484
 
            level = getattr(logging, debuglevel.upper())
2485
 
            initlogger(debug, level)
2486
 
    
2487
 
    if server_settings["servicename"] != "Mandos":
2488
 
        syslogger.setFormatter(
2489
 
            logging.Formatter('Mandos ({}) [%(process)d]:'
2490
 
                              ' %(levelname)s: %(message)s'.format(
2491
 
                                  server_settings["servicename"])))
2492
 
    
2493
 
    # Parse config file with clients
2494
 
    client_config = configparser.SafeConfigParser(Client
2495
 
                                                  .client_defaults)
2496
 
    client_config.read(os.path.join(server_settings["configdir"],
2497
 
                                    "clients.conf"))
2498
 
    
2499
 
    global mandos_dbus_service
2500
 
    mandos_dbus_service = None
2501
 
    
2502
 
    socketfd = None
2503
 
    if server_settings["socket"] != "":
2504
 
        socketfd = server_settings["socket"]
2505
 
    tcp_server = MandosServer(
2506
 
        (server_settings["address"], server_settings["port"]),
2507
 
        ClientHandler,
2508
 
        interface=(server_settings["interface"] or None),
2509
 
        use_ipv6=use_ipv6,
2510
 
        gnutls_priority=server_settings["priority"],
2511
 
        use_dbus=use_dbus,
2512
 
        socketfd=socketfd)
2513
 
    if not foreground:
2514
 
        pidfilename = "/run/mandos.pid"
2515
 
        if not os.path.isdir("/run/."):
2516
 
            pidfilename = "/var/run/mandos.pid"
2517
 
        pidfile = None
2518
 
        try:
2519
 
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2520
 
        except IOError as e:
2521
 
            logger.error("Could not open file %r", pidfilename,
2522
 
                         exc_info=e)
2523
 
    
2524
 
    for name in ("_mandos", "mandos", "nobody"):
2525
 
        try:
2526
 
            uid = pwd.getpwnam(name).pw_uid
2527
 
            gid = pwd.getpwnam(name).pw_gid
2528
 
            break
2529
 
        except KeyError:
2530
 
            continue
2531
 
    else:
2532
 
        uid = 65534
2533
 
        gid = 65534
2534
 
    try:
2535
 
        os.setgid(gid)
2536
 
        os.setuid(uid)
2537
 
    except OSError as error:
2538
 
        if error.errno != errno.EPERM:
2539
 
            raise
2540
 
    
2541
 
    if debug:
2542
 
        # Enable all possible GnuTLS debugging
2543
 
        
2544
 
        # "Use a log level over 10 to enable all debugging options."
2545
 
        # - GnuTLS manual
2546
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2547
 
        
2548
 
        @gnutls.library.types.gnutls_log_func
2549
 
        def debug_gnutls(level, string):
2550
 
            logger.debug("GnuTLS: %s", string[:-1])
2551
 
        
2552
 
        gnutls.library.functions.gnutls_global_set_log_function(
2553
 
            debug_gnutls)
2554
 
        
2555
 
        # Redirect stdin so all checkers get /dev/null
2556
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2557
 
        os.dup2(null, sys.stdin.fileno())
2558
 
        if null > 2:
2559
 
            os.close(null)
2560
 
    
2561
 
    # Need to fork before connecting to D-Bus
2562
 
    if not foreground:
2563
 
        # Close all input and output, do double fork, etc.
2564
 
        daemon()
2565
 
    
2566
 
    # multiprocessing will use threads, so before we use gobject we
2567
 
    # need to inform gobject that threads will be used.
2568
 
    gobject.threads_init()
2569
 
    
2570
 
    global main_loop
2571
 
    # From the Avahi example code
2572
 
    DBusGMainLoop(set_as_default=True)
2573
 
    main_loop = gobject.MainLoop()
2574
 
    bus = dbus.SystemBus()
2575
 
    # End of Avahi example code
2576
 
    if use_dbus:
2577
 
        try:
2578
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2579
 
                                            bus,
2580
 
                                            do_not_queue=True)
2581
 
            old_bus_name = dbus.service.BusName(
2582
 
                "se.bsnet.fukt.Mandos", bus,
2583
 
                do_not_queue=True)
2584
 
        except dbus.exceptions.DBusException as e:
2585
 
            logger.error("Disabling D-Bus:", exc_info=e)
2586
 
            use_dbus = False
2587
 
            server_settings["use_dbus"] = False
2588
 
            tcp_server.use_dbus = False
2589
 
    if zeroconf:
2590
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2591
 
        service = AvahiServiceToSyslog(
2592
 
            name = server_settings["servicename"],
2593
 
            servicetype = "_mandos._tcp",
2594
 
            protocol = protocol,
2595
 
            bus = bus)
2596
 
        if server_settings["interface"]:
2597
 
            service.interface = if_nametoindex(
2598
 
                server_settings["interface"].encode("utf-8"))
2599
 
    
2600
 
    global multiprocessing_manager
2601
 
    multiprocessing_manager = multiprocessing.Manager()
2602
 
    
2603
 
    client_class = Client
2604
 
    if use_dbus:
2605
 
        client_class = functools.partial(ClientDBus, bus = bus)
2606
 
    
2607
 
    client_settings = Client.config_parser(client_config)
2608
 
    old_client_settings = {}
2609
 
    clients_data = {}
2610
 
    
2611
 
    # This is used to redirect stdout and stderr for checker processes
2612
 
    global wnull
2613
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2614
 
    # Only used if server is running in foreground but not in debug
2615
 
    # mode
2616
 
    if debug or not foreground:
2617
 
        wnull.close()
2618
 
    
2619
 
    # Get client data and settings from last running state.
2620
 
    if server_settings["restore"]:
2621
 
        try:
2622
 
            with open(stored_state_path, "rb") as stored_state:
2623
 
                clients_data, old_client_settings = pickle.load(
2624
 
                    stored_state)
2625
 
            os.remove(stored_state_path)
2626
 
        except IOError as e:
2627
 
            if e.errno == errno.ENOENT:
2628
 
                logger.warning("Could not load persistent state:"
2629
 
                               " {}".format(os.strerror(e.errno)))
2630
 
            else:
2631
 
                logger.critical("Could not load persistent state:",
2632
 
                                exc_info=e)
2633
 
                raise
2634
 
        except EOFError as e:
2635
 
            logger.warning("Could not load persistent state: "
2636
 
                           "EOFError:",
2637
 
                           exc_info=e)
2638
 
    
2639
 
    with PGPEngine() as pgp:
2640
 
        for client_name, client in clients_data.items():
2641
 
            # Skip removed clients
2642
 
            if client_name not in client_settings:
2643
 
                continue
2644
 
            
2645
 
            # Decide which value to use after restoring saved state.
2646
 
            # We have three different values: Old config file,
2647
 
            # new config file, and saved state.
2648
 
            # New config value takes precedence if it differs from old
2649
 
            # config value, otherwise use saved state.
2650
 
            for name, value in client_settings[client_name].items():
2651
 
                try:
2652
 
                    # For each value in new config, check if it
2653
 
                    # differs from the old config value (Except for
2654
 
                    # the "secret" attribute)
2655
 
                    if (name != "secret"
2656
 
                        and (value !=
2657
 
                             old_client_settings[client_name][name])):
2658
 
                        client[name] = value
2659
 
                except KeyError:
2660
 
                    pass
2661
 
            
2662
 
            # Clients who has passed its expire date can still be
2663
 
            # enabled if its last checker was successful.  Clients
2664
 
            # whose checker succeeded before we stored its state is
2665
 
            # assumed to have successfully run all checkers during
2666
 
            # downtime.
2667
 
            if client["enabled"]:
2668
 
                if datetime.datetime.utcnow() >= client["expires"]:
2669
 
                    if not client["last_checked_ok"]:
2670
 
                        logger.warning(
2671
 
                            "disabling client {} - Client never "
2672
 
                            "performed a successful checker".format(
2673
 
                                client_name))
2674
 
                        client["enabled"] = False
2675
 
                    elif client["last_checker_status"] != 0:
2676
 
                        logger.warning(
2677
 
                            "disabling client {} - Client last"
2678
 
                            " checker failed with error code"
2679
 
                            " {}".format(
2680
 
                                client_name,
2681
 
                                client["last_checker_status"]))
2682
 
                        client["enabled"] = False
2683
 
                    else:
2684
 
                        client["expires"] = (
2685
 
                            datetime.datetime.utcnow()
2686
 
                            + client["timeout"])
2687
 
                        logger.debug("Last checker succeeded,"
2688
 
                                     " keeping {} enabled".format(
2689
 
                                         client_name))
2690
 
            try:
2691
 
                client["secret"] = pgp.decrypt(
2692
 
                    client["encrypted_secret"],
2693
 
                    client_settings[client_name]["secret"])
2694
 
            except PGPError:
2695
 
                # If decryption fails, we use secret from new settings
2696
 
                logger.debug("Failed to decrypt {} old secret".format(
2697
 
                    client_name))
2698
 
                client["secret"] = (client_settings[client_name]
2699
 
                                    ["secret"])
2700
 
    
2701
 
    # Add/remove clients based on new changes made to config
2702
 
    for client_name in (set(old_client_settings)
2703
 
                        - set(client_settings)):
2704
 
        del clients_data[client_name]
2705
 
    for client_name in (set(client_settings)
2706
 
                        - set(old_client_settings)):
2707
 
        clients_data[client_name] = client_settings[client_name]
2708
 
    
2709
 
    # Create all client objects
2710
 
    for client_name, client in clients_data.items():
2711
 
        tcp_server.clients[client_name] = client_class(
2712
 
            name = client_name,
2713
 
            settings = client,
2714
 
            server_settings = server_settings)
2715
 
    
2716
 
    if not tcp_server.clients:
2717
 
        logger.warning("No clients defined")
2718
 
    
2719
 
    if not foreground:
2720
 
        if pidfile is not None:
2721
 
            pid = os.getpid()
2722
 
            try:
2723
 
                with pidfile:
2724
 
                    print(pid, file=pidfile)
2725
 
            except IOError:
2726
 
                logger.error("Could not write to file %r with PID %d",
2727
 
                             pidfilename, pid)
2728
 
        del pidfile
2729
 
        del pidfilename
2730
 
    
2731
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2732
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2733
 
    
2734
 
    if use_dbus:
2735
 
        
2736
 
        @alternate_dbus_interfaces(
2737
 
            { "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2738
 
        class MandosDBusService(DBusObjectWithProperties):
2739
 
            """A D-Bus proxy object"""
2740
 
            
2741
 
            def __init__(self):
2742
 
                dbus.service.Object.__init__(self, bus, "/")
2743
 
            
2744
 
            _interface = "se.recompile.Mandos"
2745
 
            
2746
 
            @dbus_interface_annotations(_interface)
2747
 
            def _foo(self):
2748
 
                return {
2749
 
                    "org.freedesktop.DBus.Property.EmitsChangedSignal":
2750
 
                    "false" }
2751
 
            
2752
 
            @dbus.service.signal(_interface, signature="o")
2753
 
            def ClientAdded(self, objpath):
2754
 
                "D-Bus signal"
2755
 
                pass
2756
 
            
2757
 
            @dbus.service.signal(_interface, signature="ss")
2758
 
            def ClientNotFound(self, fingerprint, address):
2759
 
                "D-Bus signal"
2760
 
                pass
2761
 
            
2762
 
            @dbus.service.signal(_interface, signature="os")
2763
 
            def ClientRemoved(self, objpath, name):
2764
 
                "D-Bus signal"
2765
 
                pass
2766
 
            
2767
 
            @dbus.service.method(_interface, out_signature="ao")
2768
 
            def GetAllClients(self):
2769
 
                "D-Bus method"
2770
 
                return dbus.Array(c.dbus_object_path for c in
2771
 
                                  tcp_server.clients.itervalues())
2772
 
            
2773
 
            @dbus.service.method(_interface,
2774
 
                                 out_signature="a{oa{sv}}")
2775
 
            def GetAllClientsWithProperties(self):
2776
 
                "D-Bus method"
2777
 
                return dbus.Dictionary(
2778
 
                    { c.dbus_object_path: c.GetAll("")
2779
 
                      for c in tcp_server.clients.itervalues() },
2780
 
                    signature="oa{sv}")
2781
 
            
2782
 
            @dbus.service.method(_interface, in_signature="o")
2783
 
            def RemoveClient(self, object_path):
2784
 
                "D-Bus method"
2785
 
                for c in tcp_server.clients.itervalues():
2786
 
                    if c.dbus_object_path == object_path:
2787
 
                        del tcp_server.clients[c.name]
2788
 
                        c.remove_from_connection()
2789
 
                        # Don't signal anything except ClientRemoved
2790
 
                        c.disable(quiet=True)
2791
 
                        # Emit D-Bus signal
2792
 
                        self.ClientRemoved(object_path, c.name)
2793
 
                        return
2794
 
                raise KeyError(object_path)
2795
 
            
2796
 
            del _interface
2797
 
        
2798
 
        mandos_dbus_service = MandosDBusService()
2799
 
    
2800
 
    def cleanup():
2801
 
        "Cleanup function; run on exit"
2802
 
        if zeroconf:
2803
 
            service.cleanup()
2804
 
        
2805
 
        multiprocessing.active_children()
2806
 
        wnull.close()
2807
 
        if not (tcp_server.clients or client_settings):
2808
 
            return
2809
 
        
2810
 
        # Store client before exiting. Secrets are encrypted with key
2811
 
        # based on what config file has. If config file is
2812
 
        # removed/edited, old secret will thus be unrecovable.
2813
 
        clients = {}
2814
 
        with PGPEngine() as pgp:
2815
 
            for client in tcp_server.clients.itervalues():
2816
 
                key = client_settings[client.name]["secret"]
2817
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2818
 
                                                      key)
2819
 
                client_dict = {}
2820
 
                
2821
 
                # A list of attributes that can not be pickled
2822
 
                # + secret.
2823
 
                exclude = { "bus", "changedstate", "secret",
2824
 
                            "checker", "server_settings" }
2825
 
                for name, typ in inspect.getmembers(dbus.service
2826
 
                                                    .Object):
2827
 
                    exclude.add(name)
2828
 
                
2829
 
                client_dict["encrypted_secret"] = (client
2830
 
                                                   .encrypted_secret)
2831
 
                for attr in client.client_structure:
2832
 
                    if attr not in exclude:
2833
 
                        client_dict[attr] = getattr(client, attr)
2834
 
                
2835
 
                clients[client.name] = client_dict
2836
 
                del client_settings[client.name]["secret"]
2837
 
        
2838
 
        try:
2839
 
            with tempfile.NamedTemporaryFile(
2840
 
                    mode='wb',
2841
 
                    suffix=".pickle",
2842
 
                    prefix='clients-',
2843
 
                    dir=os.path.dirname(stored_state_path),
2844
 
                    delete=False) as stored_state:
2845
 
                pickle.dump((clients, client_settings), stored_state)
2846
 
                tempname = stored_state.name
2847
 
            os.rename(tempname, stored_state_path)
2848
 
        except (IOError, OSError) as e:
2849
 
            if not debug:
2850
 
                try:
2851
 
                    os.remove(tempname)
2852
 
                except NameError:
2853
 
                    pass
2854
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2855
 
                logger.warning("Could not save persistent state: {}"
2856
 
                               .format(os.strerror(e.errno)))
2857
 
            else:
2858
 
                logger.warning("Could not save persistent state:",
2859
 
                               exc_info=e)
2860
 
                raise
2861
 
        
2862
 
        # Delete all clients, and settings from config
2863
 
        while tcp_server.clients:
2864
 
            name, client = tcp_server.clients.popitem()
2865
 
            if use_dbus:
2866
 
                client.remove_from_connection()
2867
 
            # Don't signal anything except ClientRemoved
2868
 
            client.disable(quiet=True)
2869
 
            if use_dbus:
2870
 
                # Emit D-Bus signal
2871
 
                mandos_dbus_service.ClientRemoved(
2872
 
                    client.dbus_object_path, client.name)
2873
 
        client_settings.clear()
2874
 
    
2875
 
    atexit.register(cleanup)
2876
 
    
2877
 
    for client in tcp_server.clients.itervalues():
2878
 
        if use_dbus:
2879
 
            # Emit D-Bus signal
2880
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2881
 
        # Need to initiate checking of clients
2882
 
        if client.enabled:
2883
 
            client.init_checker()
2884
 
    
2885
 
    tcp_server.enable()
2886
 
    tcp_server.server_activate()
2887
 
    
2888
 
    # Find out what port we got
2889
 
    if zeroconf:
2890
 
        service.port = tcp_server.socket.getsockname()[1]
2891
 
    if use_ipv6:
2892
 
        logger.info("Now listening on address %r, port %d,"
2893
 
                    " flowinfo %d, scope_id %d",
2894
 
                    *tcp_server.socket.getsockname())
2895
 
    else:                       # IPv4
2896
 
        logger.info("Now listening on address %r, port %d",
2897
 
                    *tcp_server.socket.getsockname())
2898
 
    
2899
 
    #service.interface = tcp_server.socket.getsockname()[3]
2900
 
    
2901
 
    try:
2902
 
        if zeroconf:
2903
 
            # From the Avahi example code
2904
 
            try:
2905
 
                service.activate()
2906
 
            except dbus.exceptions.DBusException as error:
2907
 
                logger.critical("D-Bus Exception", exc_info=error)
2908
 
                cleanup()
2909
 
                sys.exit(1)
2910
 
            # End of Avahi example code
2911
 
        
2912
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2913
 
                             lambda *args, **kwargs:
2914
 
                             (tcp_server.handle_request
2915
 
                              (*args[2:], **kwargs) or True))
2916
 
        
2917
 
        logger.debug("Starting main loop")
2918
 
        main_loop.run()
2919
 
    except AvahiError as error:
2920
 
        logger.critical("Avahi Error", exc_info=error)
2921
 
        cleanup()
2922
 
        sys.exit(1)
2923
 
    except KeyboardInterrupt:
2924
 
        if debug:
2925
 
            print("", file=sys.stderr)
2926
 
        logger.debug("Server received KeyboardInterrupt")
2927
 
    logger.debug("Server exiting")
2928
 
    # Must run before the D-Bus bus name gets deregistered
2929
 
    cleanup()
2930
 
 
2931
 
 
2932
 
if __name__ == '__main__':
 
194
        doctest.testmod()
 
195
        sys.exit()
 
196
    
 
197
    # Parse the time arguments
 
198
    try:
 
199
        options.timeout = string_to_delta(options.timeout)
 
200
    except ValueError:
 
201
        parser.error("option --timeout: Unparseable time")
 
202
    
 
203
    try:
 
204
        options.interval = string_to_delta(options.interval)
 
205
    except ValueError:
 
206
        parser.error("option --interval: Unparseable time")
 
207
    
 
208
    cert = gnutls.crypto.X509Certificate(open(options.cert).read())
 
209
    key = gnutls.crypto.X509PrivateKey(open(options.key).read())
 
210
    ca = gnutls.crypto.X509Certificate(open(options.ca).read())
 
211
    crl = gnutls.crypto.X509CRL(open(options.crl).read())
 
212
    cred = gnutls.connection.X509Credentials(cert, key, [ca], [crl])
 
213
    
 
214
    # Parse config file
 
215
    defaults = {}
 
216
    client_config_object = ConfigParser.SafeConfigParser(defaults)
 
217
    client_config_object.read("mandos-clients.conf")
 
218
    clients = [Client(name=section, options=options,
 
219
                      **(dict(client_config_object.items(section))))
 
220
               for section in client_config_object.sections()]
 
221
    
 
222
    udp_server = IPv6_UDPServer((in6addr_any, options.port),
 
223
                                udp_handler,
 
224
                                options=options)
 
225
    
 
226
    tcp_server = IPv6_TCPServer((in6addr_any, options.port),
 
227
                                tcp_handler,
 
228
                                options=options,
 
229
                                clients=clients,
 
230
                                credentials=cred)
 
231
    
 
232
    while True:
 
233
        in_, out, err = select.select((udp_server,
 
234
                                       tcp_server), (), ())
 
235
        for server in in_:
 
236
            server.handle_request()
 
237
 
 
238
 
 
239
if __name__ == "__main__":
2933
240
    main()
 
241