/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2009-01-18 00:18:50 UTC
  • Revision ID: teddy@fukt.bsnet.se-20090118001850-pvg8xjwmbyt23fom
* debian/rules (install-indep): Removed "--no-start" from
                                dh_installinit.

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Lines of Context:
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008-2012 Teddy Hogeborn
15
 
# Copyright © 2008-2012 Björn Påhlsson
 
14
# Copyright © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
16
16
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program.  If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
31
 
# Contact the authors at <mandos@recompile.se>.
 
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
33
33
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
from future_builtins import *
38
 
 
39
 
import SocketServer as socketserver
 
34
from __future__ import division, with_statement, absolute_import
 
35
 
 
36
import SocketServer
40
37
import socket
41
 
import argparse
 
38
import optparse
42
39
import datetime
43
40
import errno
44
41
import gnutls.crypto
47
44
import gnutls.library.functions
48
45
import gnutls.library.constants
49
46
import gnutls.library.types
50
 
import ConfigParser as configparser
 
47
import ConfigParser
51
48
import sys
52
49
import re
53
50
import os
54
51
import signal
 
52
from sets import Set
55
53
import subprocess
56
54
import atexit
57
55
import stat
58
56
import logging
59
57
import logging.handlers
60
58
import pwd
61
 
import contextlib
62
 
import struct
63
 
import fcntl
64
 
import functools
65
 
import cPickle as pickle
66
 
import multiprocessing
67
 
import types
68
 
import binascii
69
 
import tempfile
70
 
import itertools
 
59
from contextlib import closing
71
60
 
72
61
import dbus
73
62
import dbus.service
76
65
from dbus.mainloop.glib import DBusGMainLoop
77
66
import ctypes
78
67
import ctypes.util
79
 
import xml.dom.minidom
80
 
import inspect
81
 
import GnuPGInterface
82
 
 
83
 
try:
84
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
 
except AttributeError:
86
 
    try:
87
 
        from IN import SO_BINDTODEVICE
88
 
    except ImportError:
89
 
        SO_BINDTODEVICE = None
90
 
 
91
 
version = "1.5.3"
92
 
stored_state_file = "clients.pickle"
93
 
 
94
 
logger = logging.getLogger()
 
68
 
 
69
version = "1.0.5"
 
70
 
 
71
logger = logging.Logger('mandos')
95
72
syslogger = (logging.handlers.SysLogHandler
96
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
 
              address = str("/dev/log")))
98
 
 
99
 
try:
100
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
101
 
                      (ctypes.util.find_library("c"))
102
 
                      .if_nametoindex)
103
 
except (OSError, AttributeError):
104
 
    def if_nametoindex(interface):
105
 
        "Get an interface index the hard way, i.e. using fcntl()"
106
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
107
 
        with contextlib.closing(socket.socket()) as s:
108
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
 
                                struct.pack(str("16s16x"),
110
 
                                            interface))
111
 
        interface_index = struct.unpack(str("I"),
112
 
                                        ifreq[16:20])[0]
113
 
        return interface_index
114
 
 
115
 
 
116
 
def initlogger(debug, level=logging.WARNING):
117
 
    """init logger and add loglevel"""
118
 
    
119
 
    syslogger.setFormatter(logging.Formatter
120
 
                           ('Mandos [%(process)d]: %(levelname)s:'
121
 
                            ' %(message)s'))
122
 
    logger.addHandler(syslogger)
123
 
    
124
 
    if debug:
125
 
        console = logging.StreamHandler()
126
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
 
                                               ' [%(process)d]:'
128
 
                                               ' %(levelname)s:'
129
 
                                               ' %(message)s'))
130
 
        logger.addHandler(console)
131
 
    logger.setLevel(level)
132
 
 
133
 
 
134
 
class PGPError(Exception):
135
 
    """Exception if encryption/decryption fails"""
136
 
    pass
137
 
 
138
 
 
139
 
class PGPEngine(object):
140
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
141
 
    def __init__(self):
142
 
        self.gnupg = GnuPGInterface.GnuPG()
143
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
144
 
        self.gnupg = GnuPGInterface.GnuPG()
145
 
        self.gnupg.options.meta_interactive = False
146
 
        self.gnupg.options.homedir = self.tempdir
147
 
        self.gnupg.options.extra_args.extend(['--force-mdc',
148
 
                                              '--quiet',
149
 
                                              '--no-use-agent'])
150
 
    
151
 
    def __enter__(self):
152
 
        return self
153
 
    
154
 
    def __exit__ (self, exc_type, exc_value, traceback):
155
 
        self._cleanup()
156
 
        return False
157
 
    
158
 
    def __del__(self):
159
 
        self._cleanup()
160
 
    
161
 
    def _cleanup(self):
162
 
        if self.tempdir is not None:
163
 
            # Delete contents of tempdir
164
 
            for root, dirs, files in os.walk(self.tempdir,
165
 
                                             topdown = False):
166
 
                for filename in files:
167
 
                    os.remove(os.path.join(root, filename))
168
 
                for dirname in dirs:
169
 
                    os.rmdir(os.path.join(root, dirname))
170
 
            # Remove tempdir
171
 
            os.rmdir(self.tempdir)
172
 
            self.tempdir = None
173
 
    
174
 
    def password_encode(self, password):
175
 
        # Passphrase can not be empty and can not contain newlines or
176
 
        # NUL bytes.  So we prefix it and hex encode it.
177
 
        return b"mandos" + binascii.hexlify(password)
178
 
    
179
 
    def encrypt(self, data, password):
180
 
        self.gnupg.passphrase = self.password_encode(password)
181
 
        with open(os.devnull, "w") as devnull:
182
 
            try:
183
 
                proc = self.gnupg.run(['--symmetric'],
184
 
                                      create_fhs=['stdin', 'stdout'],
185
 
                                      attach_fhs={'stderr': devnull})
186
 
                with contextlib.closing(proc.handles['stdin']) as f:
187
 
                    f.write(data)
188
 
                with contextlib.closing(proc.handles['stdout']) as f:
189
 
                    ciphertext = f.read()
190
 
                proc.wait()
191
 
            except IOError as e:
192
 
                raise PGPError(e)
193
 
        self.gnupg.passphrase = None
194
 
        return ciphertext
195
 
    
196
 
    def decrypt(self, data, password):
197
 
        self.gnupg.passphrase = self.password_encode(password)
198
 
        with open(os.devnull, "w") as devnull:
199
 
            try:
200
 
                proc = self.gnupg.run(['--decrypt'],
201
 
                                      create_fhs=['stdin', 'stdout'],
202
 
                                      attach_fhs={'stderr': devnull})
203
 
                with contextlib.closing(proc.handles['stdin']) as f:
204
 
                    f.write(data)
205
 
                with contextlib.closing(proc.handles['stdout']) as f:
206
 
                    decrypted_plaintext = f.read()
207
 
                proc.wait()
208
 
            except IOError as e:
209
 
                raise PGPError(e)
210
 
        self.gnupg.passphrase = None
211
 
        return decrypted_plaintext
212
 
 
 
74
              address = "/dev/log"))
 
75
syslogger.setFormatter(logging.Formatter
 
76
                       ('Mandos: %(levelname)s: %(message)s'))
 
77
logger.addHandler(syslogger)
 
78
 
 
79
console = logging.StreamHandler()
 
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
81
                                       ' %(message)s'))
 
82
logger.addHandler(console)
213
83
 
214
84
class AvahiError(Exception):
215
85
    def __init__(self, value, *args, **kwargs):
227
97
 
228
98
class AvahiService(object):
229
99
    """An Avahi (Zeroconf) service.
230
 
    
231
100
    Attributes:
232
101
    interface: integer; avahi.IF_UNSPEC or an interface index.
233
102
               Used to optionally bind to the specified interface.
241
110
    max_renames: integer; maximum number of renames
242
111
    rename_count: integer; counter so we only rename after collisions
243
112
                  a sensible number of times
244
 
    group: D-Bus Entry Group
245
 
    server: D-Bus Server
246
 
    bus: dbus.SystemBus()
247
113
    """
248
 
    
249
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
250
115
                 servicetype = None, port = None, TXT = None,
251
 
                 domain = "", host = "", max_renames = 32768,
252
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
116
                 domain = "", host = "", max_renames = 32768):
253
117
        self.interface = interface
254
118
        self.name = name
255
119
        self.type = servicetype
259
123
        self.host = host
260
124
        self.rename_count = 0
261
125
        self.max_renames = max_renames
262
 
        self.protocol = protocol
263
 
        self.group = None       # our entry group
264
 
        self.server = None
265
 
        self.bus = bus
266
 
        self.entry_group_state_changed_match = None
267
 
    
268
126
    def rename(self):
269
127
        """Derived from the Avahi example code"""
270
128
        if self.rename_count >= self.max_renames:
271
 
            logger.critical("No suitable Zeroconf service name found"
272
 
                            " after %i retries, exiting.",
 
129
            logger.critical(u"No suitable Zeroconf service name found"
 
130
                            u" after %i retries, exiting.",
273
131
                            self.rename_count)
274
 
            raise AvahiServiceError("Too many renames")
275
 
        self.name = unicode(self.server
276
 
                            .GetAlternativeServiceName(self.name))
277
 
        logger.info("Changing Zeroconf service name to %r ...",
278
 
                    self.name)
 
132
            raise AvahiServiceError(u"Too many renames")
 
133
        self.name = server.GetAlternativeServiceName(self.name)
 
134
        logger.info(u"Changing Zeroconf service name to %r ...",
 
135
                    str(self.name))
 
136
        syslogger.setFormatter(logging.Formatter
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                                ' %%(message)s' % self.name))
279
139
        self.remove()
280
 
        try:
281
 
            self.add()
282
 
        except dbus.exceptions.DBusException as error:
283
 
            logger.critical("D-Bus Exception", exc_info=error)
284
 
            self.cleanup()
285
 
            os._exit(1)
 
140
        self.add()
286
141
        self.rename_count += 1
287
 
    
288
142
    def remove(self):
289
143
        """Derived from the Avahi example code"""
290
 
        if self.entry_group_state_changed_match is not None:
291
 
            self.entry_group_state_changed_match.remove()
292
 
            self.entry_group_state_changed_match = None
293
 
        if self.group is not None:
294
 
            self.group.Reset()
295
 
    
 
144
        if group is not None:
 
145
            group.Reset()
296
146
    def add(self):
297
147
        """Derived from the Avahi example code"""
298
 
        self.remove()
299
 
        if self.group is None:
300
 
            self.group = dbus.Interface(
301
 
                self.bus.get_object(avahi.DBUS_NAME,
302
 
                                    self.server.EntryGroupNew()),
303
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
304
 
        self.entry_group_state_changed_match = (
305
 
            self.group.connect_to_signal(
306
 
                'StateChanged', self.entry_group_state_changed))
307
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
308
 
                     self.name, self.type)
309
 
        self.group.AddService(
310
 
            self.interface,
311
 
            self.protocol,
312
 
            dbus.UInt32(0),     # flags
313
 
            self.name, self.type,
314
 
            self.domain, self.host,
315
 
            dbus.UInt16(self.port),
316
 
            avahi.string_array_to_txt_array(self.TXT))
317
 
        self.group.Commit()
318
 
    
319
 
    def entry_group_state_changed(self, state, error):
320
 
        """Derived from the Avahi example code"""
321
 
        logger.debug("Avahi entry group state change: %i", state)
322
 
        
323
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
324
 
            logger.debug("Zeroconf service established.")
325
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
326
 
            logger.info("Zeroconf service name collision.")
327
 
            self.rename()
328
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
329
 
            logger.critical("Avahi: Error in group state changed %s",
330
 
                            unicode(error))
331
 
            raise AvahiGroupError("State changed: {0!s}"
332
 
                                  .format(error))
333
 
    
334
 
    def cleanup(self):
335
 
        """Derived from the Avahi example code"""
336
 
        if self.group is not None:
337
 
            try:
338
 
                self.group.Free()
339
 
            except (dbus.exceptions.UnknownMethodException,
340
 
                    dbus.exceptions.DBusException):
341
 
                pass
342
 
            self.group = None
343
 
        self.remove()
344
 
    
345
 
    def server_state_changed(self, state, error=None):
346
 
        """Derived from the Avahi example code"""
347
 
        logger.debug("Avahi server state change: %i", state)
348
 
        bad_states = { avahi.SERVER_INVALID:
349
 
                           "Zeroconf server invalid",
350
 
                       avahi.SERVER_REGISTERING: None,
351
 
                       avahi.SERVER_COLLISION:
352
 
                           "Zeroconf server name collision",
353
 
                       avahi.SERVER_FAILURE:
354
 
                           "Zeroconf server failure" }
355
 
        if state in bad_states:
356
 
            if bad_states[state] is not None:
357
 
                if error is None:
358
 
                    logger.error(bad_states[state])
359
 
                else:
360
 
                    logger.error(bad_states[state] + ": %r", error)
361
 
            self.cleanup()
362
 
        elif state == avahi.SERVER_RUNNING:
363
 
            self.add()
364
 
        else:
365
 
            if error is None:
366
 
                logger.debug("Unknown state: %r", state)
367
 
            else:
368
 
                logger.debug("Unknown state: %r: %r", state, error)
369
 
    
370
 
    def activate(self):
371
 
        """Derived from the Avahi example code"""
372
 
        if self.server is None:
373
 
            self.server = dbus.Interface(
374
 
                self.bus.get_object(avahi.DBUS_NAME,
375
 
                                    avahi.DBUS_PATH_SERVER,
376
 
                                    follow_name_owner_changes=True),
377
 
                avahi.DBUS_INTERFACE_SERVER)
378
 
        self.server.connect_to_signal("StateChanged",
379
 
                                 self.server_state_changed)
380
 
        self.server_state_changed(self.server.GetState())
381
 
 
382
 
 
383
 
class AvahiServiceToSyslog(AvahiService):
384
 
    def rename(self):
385
 
        """Add the new name to the syslog messages"""
386
 
        ret = AvahiService.rename(self)
387
 
        syslogger.setFormatter(logging.Formatter
388
 
                               ('Mandos ({0}) [%(process)d]:'
389
 
                                ' %(levelname)s: %(message)s'
390
 
                                .format(self.name)))
391
 
        return ret
392
 
 
393
 
 
394
 
def timedelta_to_milliseconds(td):
395
 
    "Convert a datetime.timedelta() to milliseconds"
396
 
    return ((td.days * 24 * 60 * 60 * 1000)
397
 
            + (td.seconds * 1000)
398
 
            + (td.microseconds // 1000))
399
 
 
400
 
 
401
 
class Client(object):
 
148
        global group
 
149
        if group is None:
 
150
            group = dbus.Interface(bus.get_object
 
151
                                   (avahi.DBUS_NAME,
 
152
                                    server.EntryGroupNew()),
 
153
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
            group.connect_to_signal('StateChanged',
 
155
                                    entry_group_state_changed)
 
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
157
                     service.name, service.type)
 
158
        group.AddService(
 
159
                self.interface,         # interface
 
160
                avahi.PROTO_INET6,      # protocol
 
161
                dbus.UInt32(0),         # flags
 
162
                self.name, self.type,
 
163
                self.domain, self.host,
 
164
                dbus.UInt16(self.port),
 
165
                avahi.string_array_to_txt_array(self.TXT))
 
166
        group.Commit()
 
167
 
 
168
# From the Avahi example code:
 
169
group = None                            # our entry group
 
170
# End of Avahi example code
 
171
 
 
172
 
 
173
def _datetime_to_dbus(dt, variant_level=0):
 
174
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
175
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
176
 
 
177
 
 
178
class Client(dbus.service.Object):
402
179
    """A representation of a client host served by this server.
403
 
    
404
180
    Attributes:
405
 
    approved:   bool(); 'None' if not yet approved/disapproved
406
 
    approval_delay: datetime.timedelta(); Time to wait for approval
407
 
    approval_duration: datetime.timedelta(); Duration of one approval
 
181
    name:       string; from the config file, used in log messages
 
182
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
183
                 uniquely identify the client
 
184
    secret:     bytestring; sent verbatim (over TLS) to client
 
185
    host:       string; available for use by the checker command
 
186
    created:    datetime.datetime(); (UTC) object creation
 
187
    last_enabled: datetime.datetime(); (UTC)
 
188
    enabled:    bool()
 
189
    last_checked_ok: datetime.datetime(); (UTC) or None
 
190
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
191
                                      until this client is invalid
 
192
    interval:   datetime.timedelta(); How often to start a new checker
 
193
    disable_hook:  If set, called by disable() as disable_hook(self)
408
194
    checker:    subprocess.Popen(); a running checker process used
409
195
                                    to see if the client lives.
410
196
                                    'None' if no process is running.
411
 
    checker_callback_tag: a gobject event source tag, or None
412
 
    checker_command: string; External command which is run to check
413
 
                     if client lives.  %() expansions are done at
 
197
    checker_initiator_tag: a gobject event source tag, or None
 
198
    disable_initiator_tag:    - '' -
 
199
    checker_callback_tag:  - '' -
 
200
    checker_command: string; External command which is run to check if
 
201
                     client lives.  %() expansions are done at
414
202
                     runtime with vars(self) as dict, so that for
415
203
                     instance %(name)s can be used in the command.
416
 
    checker_initiator_tag: a gobject event source tag, or None
417
 
    created:    datetime.datetime(); (UTC) object creation
418
 
    client_structure: Object describing what attributes a client has
419
 
                      and is used for storing the client at exit
420
 
    current_checker_command: string; current running checker_command
421
 
    disable_initiator_tag: a gobject event source tag, or None
422
 
    enabled:    bool()
423
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
424
 
                 uniquely identify the client
425
 
    host:       string; available for use by the checker command
426
 
    interval:   datetime.timedelta(); How often to start a new checker
427
 
    last_approval_request: datetime.datetime(); (UTC) or None
428
 
    last_checked_ok: datetime.datetime(); (UTC) or None
429
 
    last_checker_status: integer between 0 and 255 reflecting exit
430
 
                         status of last checker. -1 reflects crashed
431
 
                         checker, -2 means no checker completed yet.
432
 
    last_enabled: datetime.datetime(); (UTC) or None
433
 
    name:       string; from the config file, used in log messages and
434
 
                        D-Bus identifiers
435
 
    secret:     bytestring; sent verbatim (over TLS) to client
436
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
437
 
                                      until this client is disabled
438
 
    extended_timeout:   extra long timeout when secret has been sent
439
 
    runtime_expansions: Allowed attributes for runtime expansion.
440
 
    expires:    datetime.datetime(); time (UTC) when a client will be
441
 
                disabled, or None
 
204
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
205
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
442
206
    """
443
 
    
444
 
    runtime_expansions = ("approval_delay", "approval_duration",
445
 
                          "created", "enabled", "expires",
446
 
                          "fingerprint", "host", "interval",
447
 
                          "last_approval_request", "last_checked_ok",
448
 
                          "last_enabled", "name", "timeout")
449
 
    client_defaults = { "timeout": "5m",
450
 
                        "extended_timeout": "15m",
451
 
                        "interval": "2m",
452
 
                        "checker": "fping -q -- %%(host)s",
453
 
                        "host": "",
454
 
                        "approval_delay": "0s",
455
 
                        "approval_duration": "1s",
456
 
                        "approved_by_default": "True",
457
 
                        "enabled": "True",
458
 
                        }
459
 
    
460
207
    def timeout_milliseconds(self):
461
208
        "Return the 'timeout' attribute in milliseconds"
462
 
        return timedelta_to_milliseconds(self.timeout)
463
 
    
464
 
    def extended_timeout_milliseconds(self):
465
 
        "Return the 'extended_timeout' attribute in milliseconds"
466
 
        return timedelta_to_milliseconds(self.extended_timeout)
 
209
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
210
                + (self.timeout.seconds * 1000)
 
211
                + (self.timeout.microseconds // 1000))
467
212
    
468
213
    def interval_milliseconds(self):
469
214
        "Return the 'interval' attribute in milliseconds"
470
 
        return timedelta_to_milliseconds(self.interval)
471
 
    
472
 
    def approval_delay_milliseconds(self):
473
 
        return timedelta_to_milliseconds(self.approval_delay)
474
 
    
475
 
    @staticmethod
476
 
    def config_parser(config):
477
 
        """Construct a new dict of client settings of this form:
478
 
        { client_name: {setting_name: value, ...}, ...}
479
 
        with exceptions for any special settings as defined above.
480
 
        NOTE: Must be a pure function. Must return the same result
481
 
        value given the same arguments.
482
 
        """
483
 
        settings = {}
484
 
        for client_name in config.sections():
485
 
            section = dict(config.items(client_name))
486
 
            client = settings[client_name] = {}
487
 
            
488
 
            client["host"] = section["host"]
489
 
            # Reformat values from string types to Python types
490
 
            client["approved_by_default"] = config.getboolean(
491
 
                client_name, "approved_by_default")
492
 
            client["enabled"] = config.getboolean(client_name,
493
 
                                                  "enabled")
494
 
            
495
 
            client["fingerprint"] = (section["fingerprint"].upper()
496
 
                                     .replace(" ", ""))
497
 
            if "secret" in section:
498
 
                client["secret"] = section["secret"].decode("base64")
499
 
            elif "secfile" in section:
500
 
                with open(os.path.expanduser(os.path.expandvars
501
 
                                             (section["secfile"])),
502
 
                          "rb") as secfile:
503
 
                    client["secret"] = secfile.read()
504
 
            else:
505
 
                raise TypeError("No secret or secfile for section {0}"
506
 
                                .format(section))
507
 
            client["timeout"] = string_to_delta(section["timeout"])
508
 
            client["extended_timeout"] = string_to_delta(
509
 
                section["extended_timeout"])
510
 
            client["interval"] = string_to_delta(section["interval"])
511
 
            client["approval_delay"] = string_to_delta(
512
 
                section["approval_delay"])
513
 
            client["approval_duration"] = string_to_delta(
514
 
                section["approval_duration"])
515
 
            client["checker_command"] = section["checker"]
516
 
            client["last_approval_request"] = None
517
 
            client["last_checked_ok"] = None
518
 
            client["last_checker_status"] = -2
519
 
        
520
 
        return settings
521
 
    
522
 
    def __init__(self, settings, name = None):
 
215
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
216
                + (self.interval.seconds * 1000)
 
217
                + (self.interval.microseconds // 1000))
 
218
    
 
219
    def __init__(self, name = None, disable_hook=None, config=None,
 
220
                 use_dbus=True):
 
221
        """Note: the 'checker' key in 'config' sets the
 
222
        'checker_command' attribute and *not* the 'checker'
 
223
        attribute."""
523
224
        self.name = name
524
 
        # adding all client settings
525
 
        for setting, value in settings.iteritems():
526
 
            setattr(self, setting, value)
527
 
        
528
 
        if self.enabled:
529
 
            if not hasattr(self, "last_enabled"):
530
 
                self.last_enabled = datetime.datetime.utcnow()
531
 
            if not hasattr(self, "expires"):
532
 
                self.expires = (datetime.datetime.utcnow()
533
 
                                + self.timeout)
534
 
        else:
535
 
            self.last_enabled = None
536
 
            self.expires = None
537
 
        
538
 
        logger.debug("Creating client %r", self.name)
 
225
        if config is None:
 
226
            config = {}
 
227
        logger.debug(u"Creating client %r", self.name)
 
228
        self.use_dbus = use_dbus
 
229
        if self.use_dbus:
 
230
            self.dbus_object_path = (dbus.ObjectPath
 
231
                                     ("/Mandos/clients/"
 
232
                                      + self.name.replace(".", "_")))
 
233
            dbus.service.Object.__init__(self, bus,
 
234
                                         self.dbus_object_path)
539
235
        # Uppercase and remove spaces from fingerprint for later
540
236
        # comparison purposes with return value from the fingerprint()
541
237
        # function
542
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
543
 
        self.created = settings.get("created",
544
 
                                    datetime.datetime.utcnow())
545
 
        
546
 
        # attributes specific for this server instance
 
238
        self.fingerprint = (config["fingerprint"].upper()
 
239
                            .replace(u" ", u""))
 
240
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
 
241
        if "secret" in config:
 
242
            self.secret = config["secret"].decode(u"base64")
 
243
        elif "secfile" in config:
 
244
            with closing(open(os.path.expanduser
 
245
                              (os.path.expandvars
 
246
                               (config["secfile"])))) as secfile:
 
247
                self.secret = secfile.read()
 
248
        else:
 
249
            raise TypeError(u"No secret or secfile for client %s"
 
250
                            % self.name)
 
251
        self.host = config.get("host", "")
 
252
        self.created = datetime.datetime.utcnow()
 
253
        self.enabled = False
 
254
        self.last_enabled = None
 
255
        self.last_checked_ok = None
 
256
        self.timeout = string_to_delta(config["timeout"])
 
257
        self.interval = string_to_delta(config["interval"])
 
258
        self.disable_hook = disable_hook
547
259
        self.checker = None
548
260
        self.checker_initiator_tag = None
549
261
        self.disable_initiator_tag = None
550
262
        self.checker_callback_tag = None
551
 
        self.current_checker_command = None
552
 
        self.approved = None
553
 
        self.approvals_pending = 0
554
 
        self.changedstate = (multiprocessing_manager
555
 
                             .Condition(multiprocessing_manager
556
 
                                        .Lock()))
557
 
        self.client_structure = [attr for attr in
558
 
                                 self.__dict__.iterkeys()
559
 
                                 if not attr.startswith("_")]
560
 
        self.client_structure.append("client_structure")
561
 
        
562
 
        for name, t in inspect.getmembers(type(self),
563
 
                                          lambda obj:
564
 
                                              isinstance(obj,
565
 
                                                         property)):
566
 
            if not name.startswith("_"):
567
 
                self.client_structure.append(name)
568
 
    
569
 
    # Send notice to process children that client state has changed
570
 
    def send_changedstate(self):
571
 
        with self.changedstate:
572
 
            self.changedstate.notify_all()
 
263
        self.checker_command = config["checker"]
573
264
    
574
265
    def enable(self):
575
266
        """Start this client's checker and timeout hooks"""
576
 
        if getattr(self, "enabled", False):
577
 
            # Already enabled
578
 
            return
579
 
        self.expires = datetime.datetime.utcnow() + self.timeout
580
 
        self.enabled = True
581
267
        self.last_enabled = datetime.datetime.utcnow()
582
 
        self.init_checker()
583
 
        self.send_changedstate()
584
 
    
585
 
    def disable(self, quiet=True):
586
 
        """Disable this client."""
587
 
        if not getattr(self, "enabled", False):
588
 
            return False
589
 
        if not quiet:
590
 
            logger.info("Disabling client %s", self.name)
591
 
        if getattr(self, "disable_initiator_tag", None) is not None:
592
 
            gobject.source_remove(self.disable_initiator_tag)
593
 
            self.disable_initiator_tag = None
594
 
        self.expires = None
595
 
        if getattr(self, "checker_initiator_tag", None) is not None:
596
 
            gobject.source_remove(self.checker_initiator_tag)
597
 
            self.checker_initiator_tag = None
598
 
        self.stop_checker()
599
 
        self.enabled = False
600
 
        if not quiet:
601
 
            self.send_changedstate()
602
 
        # Do not run this again if called by a gobject.timeout_add
603
 
        return False
604
 
    
605
 
    def __del__(self):
606
 
        self.disable()
607
 
    
608
 
    def init_checker(self):
609
268
        # Schedule a new checker to be started an 'interval' from now,
610
269
        # and every interval from then on.
611
 
        if self.checker_initiator_tag is not None:
612
 
            gobject.source_remove(self.checker_initiator_tag)
613
270
        self.checker_initiator_tag = (gobject.timeout_add
614
271
                                      (self.interval_milliseconds(),
615
272
                                       self.start_checker))
 
273
        # Also start a new checker *right now*.
 
274
        self.start_checker()
616
275
        # Schedule a disable() when 'timeout' has passed
617
 
        if self.disable_initiator_tag is not None:
618
 
            gobject.source_remove(self.disable_initiator_tag)
619
276
        self.disable_initiator_tag = (gobject.timeout_add
620
277
                                   (self.timeout_milliseconds(),
621
278
                                    self.disable))
622
 
        # Also start a new checker *right now*.
623
 
        self.start_checker()
 
279
        self.enabled = True
 
280
        if self.use_dbus:
 
281
            # Emit D-Bus signals
 
282
            self.PropertyChanged(dbus.String(u"enabled"),
 
283
                                 dbus.Boolean(True, variant_level=1))
 
284
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
285
                                 (_datetime_to_dbus(self.last_enabled,
 
286
                                                    variant_level=1)))
 
287
    
 
288
    def disable(self):
 
289
        """Disable this client."""
 
290
        if not getattr(self, "enabled", False):
 
291
            return False
 
292
        logger.info(u"Disabling client %s", self.name)
 
293
        if getattr(self, "disable_initiator_tag", False):
 
294
            gobject.source_remove(self.disable_initiator_tag)
 
295
            self.disable_initiator_tag = None
 
296
        if getattr(self, "checker_initiator_tag", False):
 
297
            gobject.source_remove(self.checker_initiator_tag)
 
298
            self.checker_initiator_tag = None
 
299
        self.stop_checker()
 
300
        if self.disable_hook:
 
301
            self.disable_hook(self)
 
302
        self.enabled = False
 
303
        if self.use_dbus:
 
304
            # Emit D-Bus signal
 
305
            self.PropertyChanged(dbus.String(u"enabled"),
 
306
                                 dbus.Boolean(False, variant_level=1))
 
307
        # Do not run this again if called by a gobject.timeout_add
 
308
        return False
 
309
    
 
310
    def __del__(self):
 
311
        self.disable_hook = None
 
312
        self.disable()
624
313
    
625
314
    def checker_callback(self, pid, condition, command):
626
315
        """The checker has completed, so take appropriate actions."""
627
316
        self.checker_callback_tag = None
628
317
        self.checker = None
629
 
        if os.WIFEXITED(condition):
630
 
            self.last_checker_status = os.WEXITSTATUS(condition)
631
 
            if self.last_checker_status == 0:
632
 
                logger.info("Checker for %(name)s succeeded",
633
 
                            vars(self))
634
 
                self.checked_ok()
635
 
            else:
636
 
                logger.info("Checker for %(name)s failed",
637
 
                            vars(self))
638
 
        else:
639
 
            self.last_checker_status = -1
640
 
            logger.warning("Checker for %(name)s crashed?",
 
318
        if self.use_dbus:
 
319
            # Emit D-Bus signal
 
320
            self.PropertyChanged(dbus.String(u"checker_running"),
 
321
                                 dbus.Boolean(False, variant_level=1))
 
322
        if (os.WIFEXITED(condition)
 
323
            and (os.WEXITSTATUS(condition) == 0)):
 
324
            logger.info(u"Checker for %(name)s succeeded",
 
325
                        vars(self))
 
326
            if self.use_dbus:
 
327
                # Emit D-Bus signal
 
328
                self.CheckerCompleted(dbus.Boolean(True),
 
329
                                      dbus.UInt16(condition),
 
330
                                      dbus.String(command))
 
331
            self.bump_timeout()
 
332
        elif not os.WIFEXITED(condition):
 
333
            logger.warning(u"Checker for %(name)s crashed?",
641
334
                           vars(self))
 
335
            if self.use_dbus:
 
336
                # Emit D-Bus signal
 
337
                self.CheckerCompleted(dbus.Boolean(False),
 
338
                                      dbus.UInt16(condition),
 
339
                                      dbus.String(command))
 
340
        else:
 
341
            logger.info(u"Checker for %(name)s failed",
 
342
                        vars(self))
 
343
            if self.use_dbus:
 
344
                # Emit D-Bus signal
 
345
                self.CheckerCompleted(dbus.Boolean(False),
 
346
                                      dbus.UInt16(condition),
 
347
                                      dbus.String(command))
642
348
    
643
 
    def checked_ok(self):
644
 
        """Assert that the client has been seen, alive and well."""
 
349
    def bump_timeout(self):
 
350
        """Bump up the timeout for this client.
 
351
        This should only be called when the client has been seen,
 
352
        alive and well.
 
353
        """
645
354
        self.last_checked_ok = datetime.datetime.utcnow()
646
 
        self.last_checker_status = 0
647
 
        self.bump_timeout()
648
 
    
649
 
    def bump_timeout(self, timeout=None):
650
 
        """Bump up the timeout for this client."""
651
 
        if timeout is None:
652
 
            timeout = self.timeout
653
 
        if self.disable_initiator_tag is not None:
654
 
            gobject.source_remove(self.disable_initiator_tag)
655
 
            self.disable_initiator_tag = None
656
 
        if getattr(self, "enabled", False):
657
 
            self.disable_initiator_tag = (gobject.timeout_add
658
 
                                          (timedelta_to_milliseconds
659
 
                                           (timeout), self.disable))
660
 
            self.expires = datetime.datetime.utcnow() + timeout
661
 
    
662
 
    def need_approval(self):
663
 
        self.last_approval_request = datetime.datetime.utcnow()
 
355
        gobject.source_remove(self.disable_initiator_tag)
 
356
        self.disable_initiator_tag = (gobject.timeout_add
 
357
                                      (self.timeout_milliseconds(),
 
358
                                       self.disable))
 
359
        if self.use_dbus:
 
360
            # Emit D-Bus signal
 
361
            self.PropertyChanged(
 
362
                dbus.String(u"last_checked_ok"),
 
363
                (_datetime_to_dbus(self.last_checked_ok,
 
364
                                   variant_level=1)))
664
365
    
665
366
    def start_checker(self):
666
367
        """Start a new checker subprocess if one is not running.
667
 
        
668
368
        If a checker already exists, leave it running and do
669
369
        nothing."""
670
370
        # The reason for not killing a running checker is that if we
671
 
        # did that, and if a checker (for some reason) started running
672
 
        # slowly and taking more than 'interval' time, then the client
673
 
        # would inevitably timeout, since no checker would get a
674
 
        # chance to run to completion.  If we instead leave running
 
371
        # did that, then if a checker (for some reason) started
 
372
        # running slowly and taking more than 'interval' time, the
 
373
        # client would inevitably timeout, since no checker would get
 
374
        # a chance to run to completion.  If we instead leave running
675
375
        # checkers alone, the checker would have to take more time
676
 
        # than 'timeout' for the client to be disabled, which is as it
677
 
        # should be.
678
 
        
679
 
        # If a checker exists, make sure it is not a zombie
680
 
        try:
681
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
 
        except (AttributeError, OSError) as error:
683
 
            if (isinstance(error, OSError)
684
 
                and error.errno != errno.ECHILD):
685
 
                raise error
686
 
        else:
687
 
            if pid:
688
 
                logger.warning("Checker was a zombie")
689
 
                gobject.source_remove(self.checker_callback_tag)
690
 
                self.checker_callback(pid, status,
691
 
                                      self.current_checker_command)
692
 
        # Start a new checker if needed
 
376
        # than 'timeout' for the client to be declared invalid, which
 
377
        # is as it should be.
693
378
        if self.checker is None:
694
 
            # Escape attributes for the shell
695
 
            escaped_attrs = dict(
696
 
                (attr, re.escape(unicode(getattr(self, attr))))
697
 
                for attr in
698
 
                self.runtime_expansions)
699
 
            try:
700
 
                command = self.checker_command % escaped_attrs
701
 
            except TypeError as error:
702
 
                logger.error('Could not format string "%s"',
703
 
                             self.checker_command, exc_info=error)
704
 
                return True # Try again later
705
 
            self.current_checker_command = command
706
 
            try:
707
 
                logger.info("Starting checker %r for %s",
 
379
            try:
 
380
                # In case checker_command has exactly one % operator
 
381
                command = self.checker_command % self.host
 
382
            except TypeError:
 
383
                # Escape attributes for the shell
 
384
                escaped_attrs = dict((key, re.escape(str(val)))
 
385
                                     for key, val in
 
386
                                     vars(self).iteritems())
 
387
                try:
 
388
                    command = self.checker_command % escaped_attrs
 
389
                except TypeError, error:
 
390
                    logger.error(u'Could not format string "%s":'
 
391
                                 u' %s', self.checker_command, error)
 
392
                    return True # Try again later
 
393
            try:
 
394
                logger.info(u"Starting checker %r for %s",
708
395
                            command, self.name)
709
396
                # We don't need to redirect stdout and stderr, since
710
397
                # in normal mode, that is already done by daemon(),
713
400
                self.checker = subprocess.Popen(command,
714
401
                                                close_fds=True,
715
402
                                                shell=True, cwd="/")
716
 
            except OSError as error:
717
 
                logger.error("Failed to start subprocess",
718
 
                             exc_info=error)
719
 
            self.checker_callback_tag = (gobject.child_watch_add
720
 
                                         (self.checker.pid,
721
 
                                          self.checker_callback,
722
 
                                          data=command))
723
 
            # The checker may have completed before the gobject
724
 
            # watch was added.  Check for this.
725
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
726
 
            if pid:
727
 
                gobject.source_remove(self.checker_callback_tag)
728
 
                self.checker_callback(pid, status, command)
 
403
                if self.use_dbus:
 
404
                    # Emit D-Bus signal
 
405
                    self.CheckerStarted(command)
 
406
                    self.PropertyChanged(
 
407
                        dbus.String("checker_running"),
 
408
                        dbus.Boolean(True, variant_level=1))
 
409
                self.checker_callback_tag = (gobject.child_watch_add
 
410
                                             (self.checker.pid,
 
411
                                              self.checker_callback,
 
412
                                              data=command))
 
413
            except OSError, error:
 
414
                logger.error(u"Failed to start subprocess: %s",
 
415
                             error)
729
416
        # Re-run this periodically if run by gobject.timeout_add
730
417
        return True
731
418
    
736
423
            self.checker_callback_tag = None
737
424
        if getattr(self, "checker", None) is None:
738
425
            return
739
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
426
        logger.debug(u"Stopping checker for %(name)s", vars(self))
740
427
        try:
741
 
            self.checker.terminate()
742
 
            #time.sleep(0.5)
 
428
            os.kill(self.checker.pid, signal.SIGTERM)
 
429
            #os.sleep(0.5)
743
430
            #if self.checker.poll() is None:
744
 
            #    self.checker.kill()
745
 
        except OSError as error:
 
431
            #    os.kill(self.checker.pid, signal.SIGKILL)
 
432
        except OSError, error:
746
433
            if error.errno != errno.ESRCH: # No such process
747
434
                raise
748
435
        self.checker = None
749
 
 
750
 
 
751
 
def dbus_service_property(dbus_interface, signature="v",
752
 
                          access="readwrite", byte_arrays=False):
753
 
    """Decorators for marking methods of a DBusObjectWithProperties to
754
 
    become properties on the D-Bus.
755
 
    
756
 
    The decorated method will be called with no arguments by "Get"
757
 
    and with one argument by "Set".
758
 
    
759
 
    The parameters, where they are supported, are the same as
760
 
    dbus.service.method, except there is only "signature", since the
761
 
    type from Get() and the type sent to Set() is the same.
762
 
    """
763
 
    # Encoding deeply encoded byte arrays is not supported yet by the
764
 
    # "Set" method, so we fail early here:
765
 
    if byte_arrays and signature != "ay":
766
 
        raise ValueError("Byte arrays not supported for non-'ay'"
767
 
                         " signature {0!r}".format(signature))
768
 
    def decorator(func):
769
 
        func._dbus_is_property = True
770
 
        func._dbus_interface = dbus_interface
771
 
        func._dbus_signature = signature
772
 
        func._dbus_access = access
773
 
        func._dbus_name = func.__name__
774
 
        if func._dbus_name.endswith("_dbus_property"):
775
 
            func._dbus_name = func._dbus_name[:-14]
776
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
777
 
        return func
778
 
    return decorator
779
 
 
780
 
 
781
 
def dbus_interface_annotations(dbus_interface):
782
 
    """Decorator for marking functions returning interface annotations
783
 
    
784
 
    Usage:
785
 
    
786
 
    @dbus_interface_annotations("org.example.Interface")
787
 
    def _foo(self):  # Function name does not matter
788
 
        return {"org.freedesktop.DBus.Deprecated": "true",
789
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
790
 
                    "false"}
791
 
    """
792
 
    def decorator(func):
793
 
        func._dbus_is_interface = True
794
 
        func._dbus_interface = dbus_interface
795
 
        func._dbus_name = dbus_interface
796
 
        return func
797
 
    return decorator
798
 
 
799
 
 
800
 
def dbus_annotations(annotations):
801
 
    """Decorator to annotate D-Bus methods, signals or properties
802
 
    Usage:
803
 
    
804
 
    @dbus_service_property("org.example.Interface", signature="b",
805
 
                           access="r")
806
 
    @dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
807
 
                        "org.freedesktop.DBus.Property."
808
 
                        "EmitsChangedSignal": "false"})
809
 
    def Property_dbus_property(self):
810
 
        return dbus.Boolean(False)
811
 
    """
812
 
    def decorator(func):
813
 
        func._dbus_annotations = annotations
814
 
        return func
815
 
    return decorator
816
 
 
817
 
 
818
 
class DBusPropertyException(dbus.exceptions.DBusException):
819
 
    """A base class for D-Bus property-related exceptions
820
 
    """
821
 
    def __unicode__(self):
822
 
        return unicode(str(self))
823
 
 
824
 
 
825
 
class DBusPropertyAccessException(DBusPropertyException):
826
 
    """A property's access permissions disallows an operation.
827
 
    """
828
 
    pass
829
 
 
830
 
 
831
 
class DBusPropertyNotFound(DBusPropertyException):
832
 
    """An attempt was made to access a non-existing property.
833
 
    """
834
 
    pass
835
 
 
836
 
 
837
 
class DBusObjectWithProperties(dbus.service.Object):
838
 
    """A D-Bus object with properties.
839
 
    
840
 
    Classes inheriting from this can use the dbus_service_property
841
 
    decorator to expose methods as D-Bus properties.  It exposes the
842
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
843
 
    """
844
 
    
845
 
    @staticmethod
846
 
    def _is_dbus_thing(thing):
847
 
        """Returns a function testing if an attribute is a D-Bus thing
848
 
        
849
 
        If called like _is_dbus_thing("method") it returns a function
850
 
        suitable for use as predicate to inspect.getmembers().
851
 
        """
852
 
        return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
853
 
                                   False)
854
 
    
855
 
    def _get_all_dbus_things(self, thing):
856
 
        """Returns a generator of (name, attribute) pairs
857
 
        """
858
 
        return ((getattr(athing.__get__(self), "_dbus_name",
859
 
                         name),
860
 
                 athing.__get__(self))
861
 
                for cls in self.__class__.__mro__
862
 
                for name, athing in
863
 
                inspect.getmembers(cls,
864
 
                                   self._is_dbus_thing(thing)))
865
 
    
866
 
    def _get_dbus_property(self, interface_name, property_name):
867
 
        """Returns a bound method if one exists which is a D-Bus
868
 
        property with the specified name and interface.
869
 
        """
870
 
        for cls in  self.__class__.__mro__:
871
 
            for name, value in (inspect.getmembers
872
 
                                (cls,
873
 
                                 self._is_dbus_thing("property"))):
874
 
                if (value._dbus_name == property_name
875
 
                    and value._dbus_interface == interface_name):
876
 
                    return value.__get__(self)
877
 
        
878
 
        # No such property
879
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
880
 
                                   + interface_name + "."
881
 
                                   + property_name)
882
 
    
883
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
884
 
                         out_signature="v")
885
 
    def Get(self, interface_name, property_name):
886
 
        """Standard D-Bus property Get() method, see D-Bus standard.
887
 
        """
888
 
        prop = self._get_dbus_property(interface_name, property_name)
889
 
        if prop._dbus_access == "write":
890
 
            raise DBusPropertyAccessException(property_name)
891
 
        value = prop()
892
 
        if not hasattr(value, "variant_level"):
893
 
            return value
894
 
        return type(value)(value, variant_level=value.variant_level+1)
895
 
    
896
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
897
 
    def Set(self, interface_name, property_name, value):
898
 
        """Standard D-Bus property Set() method, see D-Bus standard.
899
 
        """
900
 
        prop = self._get_dbus_property(interface_name, property_name)
901
 
        if prop._dbus_access == "read":
902
 
            raise DBusPropertyAccessException(property_name)
903
 
        if prop._dbus_get_args_options["byte_arrays"]:
904
 
            # The byte_arrays option is not supported yet on
905
 
            # signatures other than "ay".
906
 
            if prop._dbus_signature != "ay":
907
 
                raise ValueError
908
 
            value = dbus.ByteArray(b''.join(chr(byte)
909
 
                                            for byte in value))
910
 
        prop(value)
911
 
    
912
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
913
 
                         out_signature="a{sv}")
914
 
    def GetAll(self, interface_name):
915
 
        """Standard D-Bus property GetAll() method, see D-Bus
916
 
        standard.
917
 
        
918
 
        Note: Will not include properties with access="write".
919
 
        """
920
 
        properties = {}
921
 
        for name, prop in self._get_all_dbus_things("property"):
922
 
            if (interface_name
923
 
                and interface_name != prop._dbus_interface):
924
 
                # Interface non-empty but did not match
925
 
                continue
926
 
            # Ignore write-only properties
927
 
            if prop._dbus_access == "write":
928
 
                continue
929
 
            value = prop()
930
 
            if not hasattr(value, "variant_level"):
931
 
                properties[name] = value
932
 
                continue
933
 
            properties[name] = type(value)(value, variant_level=
934
 
                                           value.variant_level+1)
935
 
        return dbus.Dictionary(properties, signature="sv")
936
 
    
937
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
938
 
                         out_signature="s",
939
 
                         path_keyword='object_path',
940
 
                         connection_keyword='connection')
941
 
    def Introspect(self, object_path, connection):
942
 
        """Overloading of standard D-Bus method.
943
 
        
944
 
        Inserts property tags and interface annotation tags.
945
 
        """
946
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
947
 
                                                   connection)
948
 
        try:
949
 
            document = xml.dom.minidom.parseString(xmlstring)
950
 
            def make_tag(document, name, prop):
951
 
                e = document.createElement("property")
952
 
                e.setAttribute("name", name)
953
 
                e.setAttribute("type", prop._dbus_signature)
954
 
                e.setAttribute("access", prop._dbus_access)
955
 
                return e
956
 
            for if_tag in document.getElementsByTagName("interface"):
957
 
                # Add property tags
958
 
                for tag in (make_tag(document, name, prop)
959
 
                            for name, prop
960
 
                            in self._get_all_dbus_things("property")
961
 
                            if prop._dbus_interface
962
 
                            == if_tag.getAttribute("name")):
963
 
                    if_tag.appendChild(tag)
964
 
                # Add annotation tags
965
 
                for typ in ("method", "signal", "property"):
966
 
                    for tag in if_tag.getElementsByTagName(typ):
967
 
                        annots = dict()
968
 
                        for name, prop in (self.
969
 
                                           _get_all_dbus_things(typ)):
970
 
                            if (name == tag.getAttribute("name")
971
 
                                and prop._dbus_interface
972
 
                                == if_tag.getAttribute("name")):
973
 
                                annots.update(getattr
974
 
                                              (prop,
975
 
                                               "_dbus_annotations",
976
 
                                               {}))
977
 
                        for name, value in annots.iteritems():
978
 
                            ann_tag = document.createElement(
979
 
                                "annotation")
980
 
                            ann_tag.setAttribute("name", name)
981
 
                            ann_tag.setAttribute("value", value)
982
 
                            tag.appendChild(ann_tag)
983
 
                # Add interface annotation tags
984
 
                for annotation, value in dict(
985
 
                    itertools.chain.from_iterable(
986
 
                        annotations().iteritems()
987
 
                        for name, annotations in
988
 
                        self._get_all_dbus_things("interface")
989
 
                        if name == if_tag.getAttribute("name")
990
 
                        )).iteritems():
991
 
                    ann_tag = document.createElement("annotation")
992
 
                    ann_tag.setAttribute("name", annotation)
993
 
                    ann_tag.setAttribute("value", value)
994
 
                    if_tag.appendChild(ann_tag)
995
 
                # Add the names to the return values for the
996
 
                # "org.freedesktop.DBus.Properties" methods
997
 
                if (if_tag.getAttribute("name")
998
 
                    == "org.freedesktop.DBus.Properties"):
999
 
                    for cn in if_tag.getElementsByTagName("method"):
1000
 
                        if cn.getAttribute("name") == "Get":
1001
 
                            for arg in cn.getElementsByTagName("arg"):
1002
 
                                if (arg.getAttribute("direction")
1003
 
                                    == "out"):
1004
 
                                    arg.setAttribute("name", "value")
1005
 
                        elif cn.getAttribute("name") == "GetAll":
1006
 
                            for arg in cn.getElementsByTagName("arg"):
1007
 
                                if (arg.getAttribute("direction")
1008
 
                                    == "out"):
1009
 
                                    arg.setAttribute("name", "props")
1010
 
            xmlstring = document.toxml("utf-8")
1011
 
            document.unlink()
1012
 
        except (AttributeError, xml.dom.DOMException,
1013
 
                xml.parsers.expat.ExpatError) as error:
1014
 
            logger.error("Failed to override Introspection method",
1015
 
                         exc_info=error)
1016
 
        return xmlstring
1017
 
 
1018
 
 
1019
 
def datetime_to_dbus (dt, variant_level=0):
1020
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1021
 
    if dt is None:
1022
 
        return dbus.String("", variant_level = variant_level)
1023
 
    return dbus.String(dt.isoformat(),
1024
 
                       variant_level=variant_level)
1025
 
 
1026
 
 
1027
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1028
 
    """A class decorator; applied to a subclass of
1029
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1030
 
    interface names according to the "alt_interface_names" mapping.
1031
 
    Usage:
1032
 
    
1033
 
    @alternate_dbus_names({"org.example.Interface":
1034
 
                               "net.example.AlternateInterface"})
1035
 
    class SampleDBusObject(dbus.service.Object):
1036
 
        @dbus.service.method("org.example.Interface")
1037
 
        def SampleDBusMethod():
1038
 
            pass
1039
 
    
1040
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1041
 
    reachable via two interfaces: "org.example.Interface" and
1042
 
    "net.example.AlternateInterface", the latter of which will have
1043
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1044
 
    "true", unless "deprecate" is passed with a False value.
1045
 
    
1046
 
    This works for methods and signals, and also for D-Bus properties
1047
 
    (from DBusObjectWithProperties) and interfaces (from the
1048
 
    dbus_interface_annotations decorator).
1049
 
    """
1050
 
    def wrapper(cls):
1051
 
        for orig_interface_name, alt_interface_name in (
1052
 
            alt_interface_names.iteritems()):
1053
 
            attr = {}
1054
 
            interface_names = set()
1055
 
            # Go though all attributes of the class
1056
 
            for attrname, attribute in inspect.getmembers(cls):
1057
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1058
 
                # with the wrong interface name
1059
 
                if (not hasattr(attribute, "_dbus_interface")
1060
 
                    or not attribute._dbus_interface
1061
 
                    .startswith(orig_interface_name)):
1062
 
                    continue
1063
 
                # Create an alternate D-Bus interface name based on
1064
 
                # the current name
1065
 
                alt_interface = (attribute._dbus_interface
1066
 
                                 .replace(orig_interface_name,
1067
 
                                          alt_interface_name))
1068
 
                interface_names.add(alt_interface)
1069
 
                # Is this a D-Bus signal?
1070
 
                if getattr(attribute, "_dbus_is_signal", False):
1071
 
                    # Extract the original non-method function by
1072
 
                    # black magic
1073
 
                    nonmethod_func = (dict(
1074
 
                            zip(attribute.func_code.co_freevars,
1075
 
                                attribute.__closure__))["func"]
1076
 
                                      .cell_contents)
1077
 
                    # Create a new, but exactly alike, function
1078
 
                    # object, and decorate it to be a new D-Bus signal
1079
 
                    # with the alternate D-Bus interface name
1080
 
                    new_function = (dbus.service.signal
1081
 
                                    (alt_interface,
1082
 
                                     attribute._dbus_signature)
1083
 
                                    (types.FunctionType(
1084
 
                                nonmethod_func.func_code,
1085
 
                                nonmethod_func.func_globals,
1086
 
                                nonmethod_func.func_name,
1087
 
                                nonmethod_func.func_defaults,
1088
 
                                nonmethod_func.func_closure)))
1089
 
                    # Copy annotations, if any
1090
 
                    try:
1091
 
                        new_function._dbus_annotations = (
1092
 
                            dict(attribute._dbus_annotations))
1093
 
                    except AttributeError:
1094
 
                        pass
1095
 
                    # Define a creator of a function to call both the
1096
 
                    # original and alternate functions, so both the
1097
 
                    # original and alternate signals gets sent when
1098
 
                    # the function is called
1099
 
                    def fixscope(func1, func2):
1100
 
                        """This function is a scope container to pass
1101
 
                        func1 and func2 to the "call_both" function
1102
 
                        outside of its arguments"""
1103
 
                        def call_both(*args, **kwargs):
1104
 
                            """This function will emit two D-Bus
1105
 
                            signals by calling func1 and func2"""
1106
 
                            func1(*args, **kwargs)
1107
 
                            func2(*args, **kwargs)
1108
 
                        return call_both
1109
 
                    # Create the "call_both" function and add it to
1110
 
                    # the class
1111
 
                    attr[attrname] = fixscope(attribute, new_function)
1112
 
                # Is this a D-Bus method?
1113
 
                elif getattr(attribute, "_dbus_is_method", False):
1114
 
                    # Create a new, but exactly alike, function
1115
 
                    # object.  Decorate it to be a new D-Bus method
1116
 
                    # with the alternate D-Bus interface name.  Add it
1117
 
                    # to the class.
1118
 
                    attr[attrname] = (dbus.service.method
1119
 
                                      (alt_interface,
1120
 
                                       attribute._dbus_in_signature,
1121
 
                                       attribute._dbus_out_signature)
1122
 
                                      (types.FunctionType
1123
 
                                       (attribute.func_code,
1124
 
                                        attribute.func_globals,
1125
 
                                        attribute.func_name,
1126
 
                                        attribute.func_defaults,
1127
 
                                        attribute.func_closure)))
1128
 
                    # Copy annotations, if any
1129
 
                    try:
1130
 
                        attr[attrname]._dbus_annotations = (
1131
 
                            dict(attribute._dbus_annotations))
1132
 
                    except AttributeError:
1133
 
                        pass
1134
 
                # Is this a D-Bus property?
1135
 
                elif getattr(attribute, "_dbus_is_property", False):
1136
 
                    # Create a new, but exactly alike, function
1137
 
                    # object, and decorate it to be a new D-Bus
1138
 
                    # property with the alternate D-Bus interface
1139
 
                    # name.  Add it to the class.
1140
 
                    attr[attrname] = (dbus_service_property
1141
 
                                      (alt_interface,
1142
 
                                       attribute._dbus_signature,
1143
 
                                       attribute._dbus_access,
1144
 
                                       attribute
1145
 
                                       ._dbus_get_args_options
1146
 
                                       ["byte_arrays"])
1147
 
                                      (types.FunctionType
1148
 
                                       (attribute.func_code,
1149
 
                                        attribute.func_globals,
1150
 
                                        attribute.func_name,
1151
 
                                        attribute.func_defaults,
1152
 
                                        attribute.func_closure)))
1153
 
                    # Copy annotations, if any
1154
 
                    try:
1155
 
                        attr[attrname]._dbus_annotations = (
1156
 
                            dict(attribute._dbus_annotations))
1157
 
                    except AttributeError:
1158
 
                        pass
1159
 
                # Is this a D-Bus interface?
1160
 
                elif getattr(attribute, "_dbus_is_interface", False):
1161
 
                    # Create a new, but exactly alike, function
1162
 
                    # object.  Decorate it to be a new D-Bus interface
1163
 
                    # with the alternate D-Bus interface name.  Add it
1164
 
                    # to the class.
1165
 
                    attr[attrname] = (dbus_interface_annotations
1166
 
                                      (alt_interface)
1167
 
                                      (types.FunctionType
1168
 
                                       (attribute.func_code,
1169
 
                                        attribute.func_globals,
1170
 
                                        attribute.func_name,
1171
 
                                        attribute.func_defaults,
1172
 
                                        attribute.func_closure)))
1173
 
            if deprecate:
1174
 
                # Deprecate all alternate interfaces
1175
 
                iname="_AlternateDBusNames_interface_annotation{0}"
1176
 
                for interface_name in interface_names:
1177
 
                    @dbus_interface_annotations(interface_name)
1178
 
                    def func(self):
1179
 
                        return { "org.freedesktop.DBus.Deprecated":
1180
 
                                     "true" }
1181
 
                    # Find an unused name
1182
 
                    for aname in (iname.format(i)
1183
 
                                  for i in itertools.count()):
1184
 
                        if aname not in attr:
1185
 
                            attr[aname] = func
1186
 
                            break
1187
 
            if interface_names:
1188
 
                # Replace the class with a new subclass of it with
1189
 
                # methods, signals, etc. as created above.
1190
 
                cls = type(b"{0}Alternate".format(cls.__name__),
1191
 
                           (cls,), attr)
1192
 
        return cls
1193
 
    return wrapper
1194
 
 
1195
 
 
1196
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1197
 
                                "se.bsnet.fukt.Mandos"})
1198
 
class ClientDBus(Client, DBusObjectWithProperties):
1199
 
    """A Client class using D-Bus
1200
 
    
1201
 
    Attributes:
1202
 
    dbus_object_path: dbus.ObjectPath
1203
 
    bus: dbus.SystemBus()
1204
 
    """
1205
 
    
1206
 
    runtime_expansions = (Client.runtime_expansions
1207
 
                          + ("dbus_object_path",))
1208
 
    
1209
 
    # dbus.service.Object doesn't use super(), so we can't either.
1210
 
    
1211
 
    def __init__(self, bus = None, *args, **kwargs):
1212
 
        self.bus = bus
1213
 
        Client.__init__(self, *args, **kwargs)
1214
 
        # Only now, when this client is initialized, can it show up on
1215
 
        # the D-Bus
1216
 
        client_object_name = unicode(self.name).translate(
1217
 
            {ord("."): ord("_"),
1218
 
             ord("-"): ord("_")})
1219
 
        self.dbus_object_path = (dbus.ObjectPath
1220
 
                                 ("/clients/" + client_object_name))
1221
 
        DBusObjectWithProperties.__init__(self, self.bus,
1222
 
                                          self.dbus_object_path)
1223
 
    
1224
 
    def notifychangeproperty(transform_func,
1225
 
                             dbus_name, type_func=lambda x: x,
1226
 
                             variant_level=1):
1227
 
        """ Modify a variable so that it's a property which announces
1228
 
        its changes to DBus.
1229
 
        
1230
 
        transform_fun: Function that takes a value and a variant_level
1231
 
                       and transforms it to a D-Bus type.
1232
 
        dbus_name: D-Bus name of the variable
1233
 
        type_func: Function that transform the value before sending it
1234
 
                   to the D-Bus.  Default: no transform
1235
 
        variant_level: D-Bus variant level.  Default: 1
1236
 
        """
1237
 
        attrname = "_{0}".format(dbus_name)
1238
 
        def setter(self, value):
1239
 
            if hasattr(self, "dbus_object_path"):
1240
 
                if (not hasattr(self, attrname) or
1241
 
                    type_func(getattr(self, attrname, None))
1242
 
                    != type_func(value)):
1243
 
                    dbus_value = transform_func(type_func(value),
1244
 
                                                variant_level
1245
 
                                                =variant_level)
1246
 
                    self.PropertyChanged(dbus.String(dbus_name),
1247
 
                                         dbus_value)
1248
 
            setattr(self, attrname, value)
1249
 
        
1250
 
        return property(lambda self: getattr(self, attrname), setter)
1251
 
    
1252
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1253
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1254
 
                                             "ApprovalPending",
1255
 
                                             type_func = bool)
1256
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1257
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1258
 
                                        "LastEnabled")
1259
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1260
 
                                   type_func = lambda checker:
1261
 
                                       checker is not None)
1262
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1263
 
                                           "LastCheckedOK")
1264
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1265
 
                                               "LastCheckerStatus")
1266
 
    last_approval_request = notifychangeproperty(
1267
 
        datetime_to_dbus, "LastApprovalRequest")
1268
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1269
 
                                               "ApprovedByDefault")
1270
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1271
 
                                          "ApprovalDelay",
1272
 
                                          type_func =
1273
 
                                          timedelta_to_milliseconds)
1274
 
    approval_duration = notifychangeproperty(
1275
 
        dbus.UInt64, "ApprovalDuration",
1276
 
        type_func = timedelta_to_milliseconds)
1277
 
    host = notifychangeproperty(dbus.String, "Host")
1278
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1279
 
                                   type_func =
1280
 
                                   timedelta_to_milliseconds)
1281
 
    extended_timeout = notifychangeproperty(
1282
 
        dbus.UInt64, "ExtendedTimeout",
1283
 
        type_func = timedelta_to_milliseconds)
1284
 
    interval = notifychangeproperty(dbus.UInt64,
1285
 
                                    "Interval",
1286
 
                                    type_func =
1287
 
                                    timedelta_to_milliseconds)
1288
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1289
 
    
1290
 
    del notifychangeproperty
1291
 
    
1292
 
    def __del__(self, *args, **kwargs):
1293
 
        try:
1294
 
            self.remove_from_connection()
1295
 
        except LookupError:
1296
 
            pass
1297
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1298
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1299
 
        Client.__del__(self, *args, **kwargs)
1300
 
    
1301
 
    def checker_callback(self, pid, condition, command,
1302
 
                         *args, **kwargs):
1303
 
        self.checker_callback_tag = None
1304
 
        self.checker = None
1305
 
        if os.WIFEXITED(condition):
1306
 
            exitstatus = os.WEXITSTATUS(condition)
1307
 
            # Emit D-Bus signal
1308
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1309
 
                                  dbus.Int64(condition),
1310
 
                                  dbus.String(command))
1311
 
        else:
1312
 
            # Emit D-Bus signal
1313
 
            self.CheckerCompleted(dbus.Int16(-1),
1314
 
                                  dbus.Int64(condition),
1315
 
                                  dbus.String(command))
1316
 
        
1317
 
        return Client.checker_callback(self, pid, condition, command,
1318
 
                                       *args, **kwargs)
1319
 
    
1320
 
    def start_checker(self, *args, **kwargs):
1321
 
        old_checker = self.checker
1322
 
        if self.checker is not None:
1323
 
            old_checker_pid = self.checker.pid
1324
 
        else:
1325
 
            old_checker_pid = None
1326
 
        r = Client.start_checker(self, *args, **kwargs)
1327
 
        # Only if new checker process was started
1328
 
        if (self.checker is not None
1329
 
            and old_checker_pid != self.checker.pid):
1330
 
            # Emit D-Bus signal
1331
 
            self.CheckerStarted(self.current_checker_command)
1332
 
        return r
1333
 
    
1334
 
    def _reset_approved(self):
1335
 
        self.approved = None
1336
 
        return False
1337
 
    
1338
 
    def approve(self, value=True):
1339
 
        self.approved = value
1340
 
        gobject.timeout_add(timedelta_to_milliseconds
1341
 
                            (self.approval_duration),
1342
 
                            self._reset_approved)
1343
 
        self.send_changedstate()
1344
 
    
1345
 
    ## D-Bus methods, signals & properties
1346
 
    _interface = "se.recompile.Mandos.Client"
1347
 
    
1348
 
    ## Interfaces
1349
 
    
1350
 
    @dbus_interface_annotations(_interface)
1351
 
    def _foo(self):
1352
 
        return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1353
 
                     "false"}
1354
 
    
1355
 
    ## Signals
 
436
        if self.use_dbus:
 
437
            self.PropertyChanged(dbus.String(u"checker_running"),
 
438
                                 dbus.Boolean(False, variant_level=1))
 
439
    
 
440
    def still_valid(self):
 
441
        """Has the timeout not yet passed for this client?"""
 
442
        if not getattr(self, "enabled", False):
 
443
            return False
 
444
        now = datetime.datetime.utcnow()
 
445
        if self.last_checked_ok is None:
 
446
            return now < (self.created + self.timeout)
 
447
        else:
 
448
            return now < (self.last_checked_ok + self.timeout)
 
449
    
 
450
    ## D-Bus methods & signals
 
451
    _interface = u"org.mandos_system.Mandos.Client"
 
452
    
 
453
    # BumpTimeout - method
 
454
    BumpTimeout = dbus.service.method(_interface)(bump_timeout)
 
455
    BumpTimeout.__name__ = "BumpTimeout"
1356
456
    
1357
457
    # CheckerCompleted - signal
1358
 
    @dbus.service.signal(_interface, signature="nxs")
1359
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
458
    @dbus.service.signal(_interface, signature="bqs")
 
459
    def CheckerCompleted(self, success, condition, command):
1360
460
        "D-Bus signal"
1361
461
        pass
1362
462
    
1366
466
        "D-Bus signal"
1367
467
        pass
1368
468
    
 
469
    # GetAllProperties - method
 
470
    @dbus.service.method(_interface, out_signature="a{sv}")
 
471
    def GetAllProperties(self):
 
472
        "D-Bus method"
 
473
        return dbus.Dictionary({
 
474
                dbus.String("name"):
 
475
                    dbus.String(self.name, variant_level=1),
 
476
                dbus.String("fingerprint"):
 
477
                    dbus.String(self.fingerprint, variant_level=1),
 
478
                dbus.String("host"):
 
479
                    dbus.String(self.host, variant_level=1),
 
480
                dbus.String("created"):
 
481
                    _datetime_to_dbus(self.created, variant_level=1),
 
482
                dbus.String("last_enabled"):
 
483
                    (_datetime_to_dbus(self.last_enabled,
 
484
                                       variant_level=1)
 
485
                     if self.last_enabled is not None
 
486
                     else dbus.Boolean(False, variant_level=1)),
 
487
                dbus.String("enabled"):
 
488
                    dbus.Boolean(self.enabled, variant_level=1),
 
489
                dbus.String("last_checked_ok"):
 
490
                    (_datetime_to_dbus(self.last_checked_ok,
 
491
                                       variant_level=1)
 
492
                     if self.last_checked_ok is not None
 
493
                     else dbus.Boolean (False, variant_level=1)),
 
494
                dbus.String("timeout"):
 
495
                    dbus.UInt64(self.timeout_milliseconds(),
 
496
                                variant_level=1),
 
497
                dbus.String("interval"):
 
498
                    dbus.UInt64(self.interval_milliseconds(),
 
499
                                variant_level=1),
 
500
                dbus.String("checker"):
 
501
                    dbus.String(self.checker_command,
 
502
                                variant_level=1),
 
503
                dbus.String("checker_running"):
 
504
                    dbus.Boolean(self.checker is not None,
 
505
                                 variant_level=1),
 
506
                }, signature="sv")
 
507
    
 
508
    # IsStillValid - method
 
509
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
510
                    (still_valid))
 
511
    IsStillValid.__name__ = "IsStillValid"
 
512
    
1369
513
    # PropertyChanged - signal
1370
514
    @dbus.service.signal(_interface, signature="sv")
1371
515
    def PropertyChanged(self, property, value):
1372
516
        "D-Bus signal"
1373
517
        pass
1374
518
    
1375
 
    # GotSecret - signal
1376
 
    @dbus.service.signal(_interface)
1377
 
    def GotSecret(self):
1378
 
        """D-Bus signal
1379
 
        Is sent after a successful transfer of secret from the Mandos
1380
 
        server to mandos-client
1381
 
        """
1382
 
        pass
1383
 
    
1384
 
    # Rejected - signal
1385
 
    @dbus.service.signal(_interface, signature="s")
1386
 
    def Rejected(self, reason):
1387
 
        "D-Bus signal"
1388
 
        pass
1389
 
    
1390
 
    # NeedApproval - signal
1391
 
    @dbus.service.signal(_interface, signature="tb")
1392
 
    def NeedApproval(self, timeout, default):
1393
 
        "D-Bus signal"
1394
 
        return self.need_approval()
1395
 
    
1396
 
    ## Methods
1397
 
    
1398
 
    # Approve - method
1399
 
    @dbus.service.method(_interface, in_signature="b")
1400
 
    def Approve(self, value):
1401
 
        self.approve(value)
1402
 
    
1403
 
    # CheckedOK - method
1404
 
    @dbus.service.method(_interface)
1405
 
    def CheckedOK(self):
1406
 
        self.checked_ok()
 
519
    # SetChecker - method
 
520
    @dbus.service.method(_interface, in_signature="s")
 
521
    def SetChecker(self, checker):
 
522
        "D-Bus setter method"
 
523
        self.checker_command = checker
 
524
        # Emit D-Bus signal
 
525
        self.PropertyChanged(dbus.String(u"checker"),
 
526
                             dbus.String(self.checker_command,
 
527
                                         variant_level=1))
 
528
    
 
529
    # SetHost - method
 
530
    @dbus.service.method(_interface, in_signature="s")
 
531
    def SetHost(self, host):
 
532
        "D-Bus setter method"
 
533
        self.host = host
 
534
        # Emit D-Bus signal
 
535
        self.PropertyChanged(dbus.String(u"host"),
 
536
                             dbus.String(self.host, variant_level=1))
 
537
    
 
538
    # SetInterval - method
 
539
    @dbus.service.method(_interface, in_signature="t")
 
540
    def SetInterval(self, milliseconds):
 
541
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
542
        # Emit D-Bus signal
 
543
        self.PropertyChanged(dbus.String(u"interval"),
 
544
                             (dbus.UInt64(self.interval_milliseconds(),
 
545
                                          variant_level=1)))
 
546
    
 
547
    # SetSecret - method
 
548
    @dbus.service.method(_interface, in_signature="ay",
 
549
                         byte_arrays=True)
 
550
    def SetSecret(self, secret):
 
551
        "D-Bus setter method"
 
552
        self.secret = str(secret)
 
553
    
 
554
    # SetTimeout - method
 
555
    @dbus.service.method(_interface, in_signature="t")
 
556
    def SetTimeout(self, milliseconds):
 
557
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
558
        # Emit D-Bus signal
 
559
        self.PropertyChanged(dbus.String(u"timeout"),
 
560
                             (dbus.UInt64(self.timeout_milliseconds(),
 
561
                                          variant_level=1)))
1407
562
    
1408
563
    # Enable - method
1409
 
    @dbus.service.method(_interface)
1410
 
    def Enable(self):
1411
 
        "D-Bus method"
1412
 
        self.enable()
 
564
    Enable = dbus.service.method(_interface)(enable)
 
565
    Enable.__name__ = "Enable"
1413
566
    
1414
567
    # StartChecker - method
1415
568
    @dbus.service.method(_interface)
1424
577
        self.disable()
1425
578
    
1426
579
    # StopChecker - method
1427
 
    @dbus.service.method(_interface)
1428
 
    def StopChecker(self):
1429
 
        self.stop_checker()
1430
 
    
1431
 
    ## Properties
1432
 
    
1433
 
    # ApprovalPending - property
1434
 
    @dbus_service_property(_interface, signature="b", access="read")
1435
 
    def ApprovalPending_dbus_property(self):
1436
 
        return dbus.Boolean(bool(self.approvals_pending))
1437
 
    
1438
 
    # ApprovedByDefault - property
1439
 
    @dbus_service_property(_interface, signature="b",
1440
 
                           access="readwrite")
1441
 
    def ApprovedByDefault_dbus_property(self, value=None):
1442
 
        if value is None:       # get
1443
 
            return dbus.Boolean(self.approved_by_default)
1444
 
        self.approved_by_default = bool(value)
1445
 
    
1446
 
    # ApprovalDelay - property
1447
 
    @dbus_service_property(_interface, signature="t",
1448
 
                           access="readwrite")
1449
 
    def ApprovalDelay_dbus_property(self, value=None):
1450
 
        if value is None:       # get
1451
 
            return dbus.UInt64(self.approval_delay_milliseconds())
1452
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1453
 
    
1454
 
    # ApprovalDuration - property
1455
 
    @dbus_service_property(_interface, signature="t",
1456
 
                           access="readwrite")
1457
 
    def ApprovalDuration_dbus_property(self, value=None):
1458
 
        if value is None:       # get
1459
 
            return dbus.UInt64(timedelta_to_milliseconds(
1460
 
                    self.approval_duration))
1461
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1462
 
    
1463
 
    # Name - property
1464
 
    @dbus_service_property(_interface, signature="s", access="read")
1465
 
    def Name_dbus_property(self):
1466
 
        return dbus.String(self.name)
1467
 
    
1468
 
    # Fingerprint - property
1469
 
    @dbus_service_property(_interface, signature="s", access="read")
1470
 
    def Fingerprint_dbus_property(self):
1471
 
        return dbus.String(self.fingerprint)
1472
 
    
1473
 
    # Host - property
1474
 
    @dbus_service_property(_interface, signature="s",
1475
 
                           access="readwrite")
1476
 
    def Host_dbus_property(self, value=None):
1477
 
        if value is None:       # get
1478
 
            return dbus.String(self.host)
1479
 
        self.host = unicode(value)
1480
 
    
1481
 
    # Created - property
1482
 
    @dbus_service_property(_interface, signature="s", access="read")
1483
 
    def Created_dbus_property(self):
1484
 
        return datetime_to_dbus(self.created)
1485
 
    
1486
 
    # LastEnabled - property
1487
 
    @dbus_service_property(_interface, signature="s", access="read")
1488
 
    def LastEnabled_dbus_property(self):
1489
 
        return datetime_to_dbus(self.last_enabled)
1490
 
    
1491
 
    # Enabled - property
1492
 
    @dbus_service_property(_interface, signature="b",
1493
 
                           access="readwrite")
1494
 
    def Enabled_dbus_property(self, value=None):
1495
 
        if value is None:       # get
1496
 
            return dbus.Boolean(self.enabled)
1497
 
        if value:
1498
 
            self.enable()
1499
 
        else:
1500
 
            self.disable()
1501
 
    
1502
 
    # LastCheckedOK - property
1503
 
    @dbus_service_property(_interface, signature="s",
1504
 
                           access="readwrite")
1505
 
    def LastCheckedOK_dbus_property(self, value=None):
1506
 
        if value is not None:
1507
 
            self.checked_ok()
1508
 
            return
1509
 
        return datetime_to_dbus(self.last_checked_ok)
1510
 
    
1511
 
    # LastCheckerStatus - property
1512
 
    @dbus_service_property(_interface, signature="n",
1513
 
                           access="read")
1514
 
    def LastCheckerStatus_dbus_property(self):
1515
 
        return dbus.Int16(self.last_checker_status)
1516
 
    
1517
 
    # Expires - property
1518
 
    @dbus_service_property(_interface, signature="s", access="read")
1519
 
    def Expires_dbus_property(self):
1520
 
        return datetime_to_dbus(self.expires)
1521
 
    
1522
 
    # LastApprovalRequest - property
1523
 
    @dbus_service_property(_interface, signature="s", access="read")
1524
 
    def LastApprovalRequest_dbus_property(self):
1525
 
        return datetime_to_dbus(self.last_approval_request)
1526
 
    
1527
 
    # Timeout - property
1528
 
    @dbus_service_property(_interface, signature="t",
1529
 
                           access="readwrite")
1530
 
    def Timeout_dbus_property(self, value=None):
1531
 
        if value is None:       # get
1532
 
            return dbus.UInt64(self.timeout_milliseconds())
1533
 
        old_timeout = self.timeout
1534
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1535
 
        # Reschedule disabling
1536
 
        if self.enabled:
1537
 
            now = datetime.datetime.utcnow()
1538
 
            self.expires += self.timeout - old_timeout
1539
 
            if self.expires <= now:
1540
 
                # The timeout has passed
1541
 
                self.disable()
1542
 
            else:
1543
 
                if (getattr(self, "disable_initiator_tag", None)
1544
 
                    is None):
1545
 
                    return
1546
 
                gobject.source_remove(self.disable_initiator_tag)
1547
 
                self.disable_initiator_tag = (
1548
 
                    gobject.timeout_add(
1549
 
                        timedelta_to_milliseconds(self.expires - now),
1550
 
                        self.disable))
1551
 
    
1552
 
    # ExtendedTimeout - property
1553
 
    @dbus_service_property(_interface, signature="t",
1554
 
                           access="readwrite")
1555
 
    def ExtendedTimeout_dbus_property(self, value=None):
1556
 
        if value is None:       # get
1557
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
1558
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1559
 
    
1560
 
    # Interval - property
1561
 
    @dbus_service_property(_interface, signature="t",
1562
 
                           access="readwrite")
1563
 
    def Interval_dbus_property(self, value=None):
1564
 
        if value is None:       # get
1565
 
            return dbus.UInt64(self.interval_milliseconds())
1566
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1567
 
        if getattr(self, "checker_initiator_tag", None) is None:
1568
 
            return
1569
 
        if self.enabled:
1570
 
            # Reschedule checker run
1571
 
            gobject.source_remove(self.checker_initiator_tag)
1572
 
            self.checker_initiator_tag = (gobject.timeout_add
1573
 
                                          (value, self.start_checker))
1574
 
            self.start_checker()    # Start one now, too
1575
 
    
1576
 
    # Checker - property
1577
 
    @dbus_service_property(_interface, signature="s",
1578
 
                           access="readwrite")
1579
 
    def Checker_dbus_property(self, value=None):
1580
 
        if value is None:       # get
1581
 
            return dbus.String(self.checker_command)
1582
 
        self.checker_command = unicode(value)
1583
 
    
1584
 
    # CheckerRunning - property
1585
 
    @dbus_service_property(_interface, signature="b",
1586
 
                           access="readwrite")
1587
 
    def CheckerRunning_dbus_property(self, value=None):
1588
 
        if value is None:       # get
1589
 
            return dbus.Boolean(self.checker is not None)
1590
 
        if value:
1591
 
            self.start_checker()
1592
 
        else:
1593
 
            self.stop_checker()
1594
 
    
1595
 
    # ObjectPath - property
1596
 
    @dbus_service_property(_interface, signature="o", access="read")
1597
 
    def ObjectPath_dbus_property(self):
1598
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1599
 
    
1600
 
    # Secret = property
1601
 
    @dbus_service_property(_interface, signature="ay",
1602
 
                           access="write", byte_arrays=True)
1603
 
    def Secret_dbus_property(self, value):
1604
 
        self.secret = str(value)
 
580
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
581
    StopChecker.__name__ = "StopChecker"
1605
582
    
1606
583
    del _interface
1607
584
 
1608
585
 
1609
 
class ProxyClient(object):
1610
 
    def __init__(self, child_pipe, fpr, address):
1611
 
        self._pipe = child_pipe
1612
 
        self._pipe.send(('init', fpr, address))
1613
 
        if not self._pipe.recv():
1614
 
            raise KeyError()
1615
 
    
1616
 
    def __getattribute__(self, name):
1617
 
        if name == '_pipe':
1618
 
            return super(ProxyClient, self).__getattribute__(name)
1619
 
        self._pipe.send(('getattr', name))
1620
 
        data = self._pipe.recv()
1621
 
        if data[0] == 'data':
1622
 
            return data[1]
1623
 
        if data[0] == 'function':
1624
 
            def func(*args, **kwargs):
1625
 
                self._pipe.send(('funcall', name, args, kwargs))
1626
 
                return self._pipe.recv()[1]
1627
 
            return func
1628
 
    
1629
 
    def __setattr__(self, name, value):
1630
 
        if name == '_pipe':
1631
 
            return super(ProxyClient, self).__setattr__(name, value)
1632
 
        self._pipe.send(('setattr', name, value))
1633
 
 
1634
 
 
1635
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1636
 
    """A class to handle client connections.
1637
 
    
1638
 
    Instantiated once for each connection to handle it.
 
586
def peer_certificate(session):
 
587
    "Return the peer's OpenPGP certificate as a bytestring"
 
588
    # If not an OpenPGP certificate...
 
589
    if (gnutls.library.functions
 
590
        .gnutls_certificate_type_get(session._c_object)
 
591
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
592
        # ...do the normal thing
 
593
        return session.peer_certificate
 
594
    list_size = ctypes.c_uint()
 
595
    cert_list = (gnutls.library.functions
 
596
                 .gnutls_certificate_get_peers
 
597
                 (session._c_object, ctypes.byref(list_size)))
 
598
    if list_size.value == 0:
 
599
        return None
 
600
    cert = cert_list[0]
 
601
    return ctypes.string_at(cert.data, cert.size)
 
602
 
 
603
 
 
604
def fingerprint(openpgp):
 
605
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
606
    # New GnuTLS "datum" with the OpenPGP public key
 
607
    datum = (gnutls.library.types
 
608
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
609
                                         ctypes.POINTER
 
610
                                         (ctypes.c_ubyte)),
 
611
                             ctypes.c_uint(len(openpgp))))
 
612
    # New empty GnuTLS certificate
 
613
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
614
    (gnutls.library.functions
 
615
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
616
    # Import the OpenPGP public key into the certificate
 
617
    (gnutls.library.functions
 
618
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
619
                                gnutls.library.constants
 
620
                                .GNUTLS_OPENPGP_FMT_RAW))
 
621
    # Verify the self signature in the key
 
622
    crtverify = ctypes.c_uint()
 
623
    (gnutls.library.functions
 
624
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
625
    if crtverify.value != 0:
 
626
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
627
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
628
    # New buffer for the fingerprint
 
629
    buf = ctypes.create_string_buffer(20)
 
630
    buf_len = ctypes.c_size_t()
 
631
    # Get the fingerprint from the certificate into the buffer
 
632
    (gnutls.library.functions
 
633
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
634
                                         ctypes.byref(buf_len)))
 
635
    # Deinit the certificate
 
636
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
637
    # Convert the buffer to a Python bytestring
 
638
    fpr = ctypes.string_at(buf, buf_len.value)
 
639
    # Convert the bytestring to hexadecimal notation
 
640
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
641
    return hex_fpr
 
642
 
 
643
 
 
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
645
    """A TCP request handler class.
 
646
    Instantiated by IPv6_TCPServer for each request to handle it.
1639
647
    Note: This will run in its own forked process."""
1640
648
    
1641
649
    def handle(self):
1642
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1643
 
            logger.info("TCP connection from: %s",
1644
 
                        unicode(self.client_address))
1645
 
            logger.debug("Pipe FD: %d",
1646
 
                         self.server.child_pipe.fileno())
1647
 
            
1648
 
            session = (gnutls.connection
1649
 
                       .ClientSession(self.request,
1650
 
                                      gnutls.connection
1651
 
                                      .X509Credentials()))
1652
 
            
1653
 
            # Note: gnutls.connection.X509Credentials is really a
1654
 
            # generic GnuTLS certificate credentials object so long as
1655
 
            # no X.509 keys are added to it.  Therefore, we can use it
1656
 
            # here despite using OpenPGP certificates.
1657
 
            
1658
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1659
 
            #                      "+AES-256-CBC", "+SHA1",
1660
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1661
 
            #                      "+DHE-DSS"))
1662
 
            # Use a fallback default, since this MUST be set.
1663
 
            priority = self.server.gnutls_priority
1664
 
            if priority is None:
1665
 
                priority = "NORMAL"
1666
 
            (gnutls.library.functions
1667
 
             .gnutls_priority_set_direct(session._c_object,
1668
 
                                         priority, None))
1669
 
            
1670
 
            # Start communication using the Mandos protocol
1671
 
            # Get protocol number
1672
 
            line = self.request.makefile().readline()
1673
 
            logger.debug("Protocol version: %r", line)
1674
 
            try:
1675
 
                if int(line.strip().split()[0]) > 1:
1676
 
                    raise RuntimeError
1677
 
            except (ValueError, IndexError, RuntimeError) as error:
1678
 
                logger.error("Unknown protocol version: %s", error)
1679
 
                return
1680
 
            
1681
 
            # Start GnuTLS connection
1682
 
            try:
1683
 
                session.handshake()
1684
 
            except gnutls.errors.GNUTLSError as error:
1685
 
                logger.warning("Handshake failed: %s", error)
1686
 
                # Do not run session.bye() here: the session is not
1687
 
                # established.  Just abandon the request.
1688
 
                return
1689
 
            logger.debug("Handshake succeeded")
1690
 
            
1691
 
            approval_required = False
1692
 
            try:
1693
 
                try:
1694
 
                    fpr = self.fingerprint(self.peer_certificate
1695
 
                                           (session))
1696
 
                except (TypeError,
1697
 
                        gnutls.errors.GNUTLSError) as error:
1698
 
                    logger.warning("Bad certificate: %s", error)
1699
 
                    return
1700
 
                logger.debug("Fingerprint: %s", fpr)
1701
 
                
1702
 
                try:
1703
 
                    client = ProxyClient(child_pipe, fpr,
1704
 
                                         self.client_address)
1705
 
                except KeyError:
1706
 
                    return
1707
 
                
1708
 
                if client.approval_delay:
1709
 
                    delay = client.approval_delay
1710
 
                    client.approvals_pending += 1
1711
 
                    approval_required = True
1712
 
                
1713
 
                while True:
1714
 
                    if not client.enabled:
1715
 
                        logger.info("Client %s is disabled",
1716
 
                                       client.name)
1717
 
                        if self.server.use_dbus:
1718
 
                            # Emit D-Bus signal
1719
 
                            client.Rejected("Disabled")
1720
 
                        return
1721
 
                    
1722
 
                    if client.approved or not client.approval_delay:
1723
 
                        #We are approved or approval is disabled
1724
 
                        break
1725
 
                    elif client.approved is None:
1726
 
                        logger.info("Client %s needs approval",
1727
 
                                    client.name)
1728
 
                        if self.server.use_dbus:
1729
 
                            # Emit D-Bus signal
1730
 
                            client.NeedApproval(
1731
 
                                client.approval_delay_milliseconds(),
1732
 
                                client.approved_by_default)
1733
 
                    else:
1734
 
                        logger.warning("Client %s was not approved",
1735
 
                                       client.name)
1736
 
                        if self.server.use_dbus:
1737
 
                            # Emit D-Bus signal
1738
 
                            client.Rejected("Denied")
1739
 
                        return
1740
 
                    
1741
 
                    #wait until timeout or approved
1742
 
                    time = datetime.datetime.now()
1743
 
                    client.changedstate.acquire()
1744
 
                    client.changedstate.wait(
1745
 
                        float(timedelta_to_milliseconds(delay)
1746
 
                              / 1000))
1747
 
                    client.changedstate.release()
1748
 
                    time2 = datetime.datetime.now()
1749
 
                    if (time2 - time) >= delay:
1750
 
                        if not client.approved_by_default:
1751
 
                            logger.warning("Client %s timed out while"
1752
 
                                           " waiting for approval",
1753
 
                                           client.name)
1754
 
                            if self.server.use_dbus:
1755
 
                                # Emit D-Bus signal
1756
 
                                client.Rejected("Approval timed out")
1757
 
                            return
1758
 
                        else:
1759
 
                            break
1760
 
                    else:
1761
 
                        delay -= time2 - time
1762
 
                
1763
 
                sent_size = 0
1764
 
                while sent_size < len(client.secret):
1765
 
                    try:
1766
 
                        sent = session.send(client.secret[sent_size:])
1767
 
                    except gnutls.errors.GNUTLSError as error:
1768
 
                        logger.warning("gnutls send failed",
1769
 
                                       exc_info=error)
1770
 
                        return
1771
 
                    logger.debug("Sent: %d, remaining: %d",
1772
 
                                 sent, len(client.secret)
1773
 
                                 - (sent_size + sent))
1774
 
                    sent_size += sent
1775
 
                
1776
 
                logger.info("Sending secret to %s", client.name)
1777
 
                # bump the timeout using extended_timeout
1778
 
                client.bump_timeout(client.extended_timeout)
1779
 
                if self.server.use_dbus:
1780
 
                    # Emit D-Bus signal
1781
 
                    client.GotSecret()
1782
 
            
1783
 
            finally:
1784
 
                if approval_required:
1785
 
                    client.approvals_pending -= 1
1786
 
                try:
1787
 
                    session.bye()
1788
 
                except gnutls.errors.GNUTLSError as error:
1789
 
                    logger.warning("GnuTLS bye failed",
1790
 
                                   exc_info=error)
1791
 
    
1792
 
    @staticmethod
1793
 
    def peer_certificate(session):
1794
 
        "Return the peer's OpenPGP certificate as a bytestring"
1795
 
        # If not an OpenPGP certificate...
1796
 
        if (gnutls.library.functions
1797
 
            .gnutls_certificate_type_get(session._c_object)
1798
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1799
 
            # ...do the normal thing
1800
 
            return session.peer_certificate
1801
 
        list_size = ctypes.c_uint(1)
1802
 
        cert_list = (gnutls.library.functions
1803
 
                     .gnutls_certificate_get_peers
1804
 
                     (session._c_object, ctypes.byref(list_size)))
1805
 
        if not bool(cert_list) and list_size.value != 0:
1806
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1807
 
                                            " certificate")
1808
 
        if list_size.value == 0:
1809
 
            return None
1810
 
        cert = cert_list[0]
1811
 
        return ctypes.string_at(cert.data, cert.size)
1812
 
    
1813
 
    @staticmethod
1814
 
    def fingerprint(openpgp):
1815
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1816
 
        # New GnuTLS "datum" with the OpenPGP public key
1817
 
        datum = (gnutls.library.types
1818
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1819
 
                                             ctypes.POINTER
1820
 
                                             (ctypes.c_ubyte)),
1821
 
                                 ctypes.c_uint(len(openpgp))))
1822
 
        # New empty GnuTLS certificate
1823
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1824
 
        (gnutls.library.functions
1825
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1826
 
        # Import the OpenPGP public key into the certificate
1827
 
        (gnutls.library.functions
1828
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1829
 
                                    gnutls.library.constants
1830
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1831
 
        # Verify the self signature in the key
1832
 
        crtverify = ctypes.c_uint()
1833
 
        (gnutls.library.functions
1834
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1835
 
                                         ctypes.byref(crtverify)))
1836
 
        if crtverify.value != 0:
1837
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1838
 
            raise (gnutls.errors.CertificateSecurityError
1839
 
                   ("Verify failed"))
1840
 
        # New buffer for the fingerprint
1841
 
        buf = ctypes.create_string_buffer(20)
1842
 
        buf_len = ctypes.c_size_t()
1843
 
        # Get the fingerprint from the certificate into the buffer
1844
 
        (gnutls.library.functions
1845
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1846
 
                                             ctypes.byref(buf_len)))
1847
 
        # Deinit the certificate
1848
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1849
 
        # Convert the buffer to a Python bytestring
1850
 
        fpr = ctypes.string_at(buf, buf_len.value)
1851
 
        # Convert the bytestring to hexadecimal notation
1852
 
        hex_fpr = binascii.hexlify(fpr).upper()
1853
 
        return hex_fpr
1854
 
 
1855
 
 
1856
 
class MultiprocessingMixIn(object):
1857
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1858
 
    def sub_process_main(self, request, address):
1859
 
        try:
1860
 
            self.finish_request(request, address)
1861
 
        except Exception:
1862
 
            self.handle_error(request, address)
1863
 
        self.close_request(request)
1864
 
    
1865
 
    def process_request(self, request, address):
1866
 
        """Start a new process to process the request."""
1867
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1868
 
                                       args = (request, address))
1869
 
        proc.start()
1870
 
        return proc
1871
 
 
1872
 
 
1873
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1874
 
    """ adds a pipe to the MixIn """
1875
 
    def process_request(self, request, client_address):
1876
 
        """Overrides and wraps the original process_request().
1877
 
        
1878
 
        This function creates a new pipe in self.pipe
1879
 
        """
1880
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1881
 
        
1882
 
        proc = MultiprocessingMixIn.process_request(self, request,
1883
 
                                                    client_address)
1884
 
        self.child_pipe.close()
1885
 
        self.add_pipe(parent_pipe, proc)
1886
 
    
1887
 
    def add_pipe(self, parent_pipe, proc):
1888
 
        """Dummy function; override as necessary"""
1889
 
        raise NotImplementedError
1890
 
 
1891
 
 
1892
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1893
 
                     socketserver.TCPServer, object):
1894
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1895
 
    
 
650
        logger.info(u"TCP connection from: %s",
 
651
                    unicode(self.client_address))
 
652
        session = (gnutls.connection
 
653
                   .ClientSession(self.request,
 
654
                                  gnutls.connection
 
655
                                  .X509Credentials()))
 
656
        
 
657
        line = self.request.makefile().readline()
 
658
        logger.debug(u"Protocol version: %r", line)
 
659
        try:
 
660
            if int(line.strip().split()[0]) > 1:
 
661
                raise RuntimeError
 
662
        except (ValueError, IndexError, RuntimeError), error:
 
663
            logger.error(u"Unknown protocol version: %s", error)
 
664
            return
 
665
        
 
666
        # Note: gnutls.connection.X509Credentials is really a generic
 
667
        # GnuTLS certificate credentials object so long as no X.509
 
668
        # keys are added to it.  Therefore, we can use it here despite
 
669
        # using OpenPGP certificates.
 
670
        
 
671
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
672
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
673
        #                "+DHE-DSS"))
 
674
        # Use a fallback default, since this MUST be set.
 
675
        priority = self.server.settings.get("priority", "NORMAL")
 
676
        (gnutls.library.functions
 
677
         .gnutls_priority_set_direct(session._c_object,
 
678
                                     priority, None))
 
679
        
 
680
        try:
 
681
            session.handshake()
 
682
        except gnutls.errors.GNUTLSError, error:
 
683
            logger.warning(u"Handshake failed: %s", error)
 
684
            # Do not run session.bye() here: the session is not
 
685
            # established.  Just abandon the request.
 
686
            return
 
687
        try:
 
688
            fpr = fingerprint(peer_certificate(session))
 
689
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
690
            logger.warning(u"Bad certificate: %s", error)
 
691
            session.bye()
 
692
            return
 
693
        logger.debug(u"Fingerprint: %s", fpr)
 
694
        for c in self.server.clients:
 
695
            if c.fingerprint == fpr:
 
696
                client = c
 
697
                break
 
698
        else:
 
699
            logger.warning(u"Client not found for fingerprint: %s",
 
700
                           fpr)
 
701
            session.bye()
 
702
            return
 
703
        # Have to check if client.still_valid(), since it is possible
 
704
        # that the client timed out while establishing the GnuTLS
 
705
        # session.
 
706
        if not client.still_valid():
 
707
            logger.warning(u"Client %(name)s is invalid",
 
708
                           vars(client))
 
709
            session.bye()
 
710
            return
 
711
        ## This won't work here, since we're in a fork.
 
712
        # client.bump_timeout()
 
713
        sent_size = 0
 
714
        while sent_size < len(client.secret):
 
715
            sent = session.send(client.secret[sent_size:])
 
716
            logger.debug(u"Sent: %d, remaining: %d",
 
717
                         sent, len(client.secret)
 
718
                         - (sent_size + sent))
 
719
            sent_size += sent
 
720
        session.bye()
 
721
 
 
722
 
 
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
724
                     SocketServer.TCPServer, object):
 
725
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1896
726
    Attributes:
 
727
        settings:       Server settings
 
728
        clients:        Set() of Client objects
1897
729
        enabled:        Boolean; whether this server is activated yet
1898
 
        interface:      None or a network interface name (string)
1899
 
        use_ipv6:       Boolean; to use IPv6 or not
1900
730
    """
1901
 
    def __init__(self, server_address, RequestHandlerClass,
1902
 
                 interface=None, use_ipv6=True):
1903
 
        self.interface = interface
1904
 
        if use_ipv6:
1905
 
            self.address_family = socket.AF_INET6
1906
 
        socketserver.TCPServer.__init__(self, server_address,
1907
 
                                        RequestHandlerClass)
 
731
    address_family = socket.AF_INET6
 
732
    def __init__(self, *args, **kwargs):
 
733
        if "settings" in kwargs:
 
734
            self.settings = kwargs["settings"]
 
735
            del kwargs["settings"]
 
736
        if "clients" in kwargs:
 
737
            self.clients = kwargs["clients"]
 
738
            del kwargs["clients"]
 
739
        self.enabled = False
 
740
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1908
741
    def server_bind(self):
1909
742
        """This overrides the normal server_bind() function
1910
743
        to bind to an interface if one was specified, and also NOT to
1911
744
        bind to an address or port if they were not specified."""
1912
 
        if self.interface is not None:
1913
 
            if SO_BINDTODEVICE is None:
1914
 
                logger.error("SO_BINDTODEVICE does not exist;"
1915
 
                             " cannot bind to interface %s",
1916
 
                             self.interface)
1917
 
            else:
1918
 
                try:
1919
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1920
 
                                           SO_BINDTODEVICE,
1921
 
                                           str(self.interface
1922
 
                                               + '\0'))
1923
 
                except socket.error as error:
1924
 
                    if error.errno == errno.EPERM:
1925
 
                        logger.error("No permission to"
1926
 
                                     " bind to interface %s",
1927
 
                                     self.interface)
1928
 
                    elif error.errno == errno.ENOPROTOOPT:
1929
 
                        logger.error("SO_BINDTODEVICE not available;"
1930
 
                                     " cannot bind to interface %s",
1931
 
                                     self.interface)
1932
 
                    elif error.errno == errno.ENODEV:
1933
 
                        logger.error("Interface %s does not"
1934
 
                                     " exist, cannot bind",
1935
 
                                     self.interface)
1936
 
                    else:
1937
 
                        raise
 
745
        if self.settings["interface"]:
 
746
            # 25 is from /usr/include/asm-i486/socket.h
 
747
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
748
            try:
 
749
                self.socket.setsockopt(socket.SOL_SOCKET,
 
750
                                       SO_BINDTODEVICE,
 
751
                                       self.settings["interface"])
 
752
            except socket.error, error:
 
753
                if error[0] == errno.EPERM:
 
754
                    logger.error(u"No permission to"
 
755
                                 u" bind to interface %s",
 
756
                                 self.settings["interface"])
 
757
                else:
 
758
                    raise error
1938
759
        # Only bind(2) the socket if we really need to.
1939
760
        if self.server_address[0] or self.server_address[1]:
1940
761
            if not self.server_address[0]:
1941
 
                if self.address_family == socket.AF_INET6:
1942
 
                    any_address = "::" # in6addr_any
1943
 
                else:
1944
 
                    any_address = socket.INADDR_ANY
1945
 
                self.server_address = (any_address,
 
762
                in6addr_any = "::"
 
763
                self.server_address = (in6addr_any,
1946
764
                                       self.server_address[1])
1947
765
            elif not self.server_address[1]:
1948
766
                self.server_address = (self.server_address[0],
1949
767
                                       0)
1950
 
#                 if self.interface:
 
768
#                 if self.settings["interface"]:
1951
769
#                     self.server_address = (self.server_address[0],
1952
770
#                                            0, # port
1953
771
#                                            0, # flowinfo
1954
772
#                                            if_nametoindex
1955
 
#                                            (self.interface))
1956
 
            return socketserver.TCPServer.server_bind(self)
1957
 
 
1958
 
 
1959
 
class MandosServer(IPv6_TCPServer):
1960
 
    """Mandos server.
1961
 
    
1962
 
    Attributes:
1963
 
        clients:        set of Client objects
1964
 
        gnutls_priority GnuTLS priority string
1965
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1966
 
    
1967
 
    Assumes a gobject.MainLoop event loop.
1968
 
    """
1969
 
    def __init__(self, server_address, RequestHandlerClass,
1970
 
                 interface=None, use_ipv6=True, clients=None,
1971
 
                 gnutls_priority=None, use_dbus=True):
1972
 
        self.enabled = False
1973
 
        self.clients = clients
1974
 
        if self.clients is None:
1975
 
            self.clients = {}
1976
 
        self.use_dbus = use_dbus
1977
 
        self.gnutls_priority = gnutls_priority
1978
 
        IPv6_TCPServer.__init__(self, server_address,
1979
 
                                RequestHandlerClass,
1980
 
                                interface = interface,
1981
 
                                use_ipv6 = use_ipv6)
 
773
#                                            (self.settings
 
774
#                                             ["interface"]))
 
775
            return super(IPv6_TCPServer, self).server_bind()
1982
776
    def server_activate(self):
1983
777
        if self.enabled:
1984
 
            return socketserver.TCPServer.server_activate(self)
1985
 
    
 
778
            return super(IPv6_TCPServer, self).server_activate()
1986
779
    def enable(self):
1987
780
        self.enabled = True
1988
 
    
1989
 
    def add_pipe(self, parent_pipe, proc):
1990
 
        # Call "handle_ipc" for both data and EOF events
1991
 
        gobject.io_add_watch(parent_pipe.fileno(),
1992
 
                             gobject.IO_IN | gobject.IO_HUP,
1993
 
                             functools.partial(self.handle_ipc,
1994
 
                                               parent_pipe =
1995
 
                                               parent_pipe,
1996
 
                                               proc = proc))
1997
 
    
1998
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1999
 
                   proc = None, client_object=None):
2000
 
        # error, or the other end of multiprocessing.Pipe has closed
2001
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2002
 
            # Wait for other process to exit
2003
 
            proc.join()
2004
 
            return False
2005
 
        
2006
 
        # Read a request from the child
2007
 
        request = parent_pipe.recv()
2008
 
        command = request[0]
2009
 
        
2010
 
        if command == 'init':
2011
 
            fpr = request[1]
2012
 
            address = request[2]
2013
 
            
2014
 
            for c in self.clients.itervalues():
2015
 
                if c.fingerprint == fpr:
2016
 
                    client = c
2017
 
                    break
2018
 
            else:
2019
 
                logger.info("Client not found for fingerprint: %s, ad"
2020
 
                            "dress: %s", fpr, address)
2021
 
                if self.use_dbus:
2022
 
                    # Emit D-Bus signal
2023
 
                    mandos_dbus_service.ClientNotFound(fpr,
2024
 
                                                       address[0])
2025
 
                parent_pipe.send(False)
2026
 
                return False
2027
 
            
2028
 
            gobject.io_add_watch(parent_pipe.fileno(),
2029
 
                                 gobject.IO_IN | gobject.IO_HUP,
2030
 
                                 functools.partial(self.handle_ipc,
2031
 
                                                   parent_pipe =
2032
 
                                                   parent_pipe,
2033
 
                                                   proc = proc,
2034
 
                                                   client_object =
2035
 
                                                   client))
2036
 
            parent_pipe.send(True)
2037
 
            # remove the old hook in favor of the new above hook on
2038
 
            # same fileno
2039
 
            return False
2040
 
        if command == 'funcall':
2041
 
            funcname = request[1]
2042
 
            args = request[2]
2043
 
            kwargs = request[3]
2044
 
            
2045
 
            parent_pipe.send(('data', getattr(client_object,
2046
 
                                              funcname)(*args,
2047
 
                                                         **kwargs)))
2048
 
        
2049
 
        if command == 'getattr':
2050
 
            attrname = request[1]
2051
 
            if callable(client_object.__getattribute__(attrname)):
2052
 
                parent_pipe.send(('function',))
2053
 
            else:
2054
 
                parent_pipe.send(('data', client_object
2055
 
                                  .__getattribute__(attrname)))
2056
 
        
2057
 
        if command == 'setattr':
2058
 
            attrname = request[1]
2059
 
            value = request[2]
2060
 
            setattr(client_object, attrname, value)
2061
 
        
2062
 
        return True
2063
781
 
2064
782
 
2065
783
def string_to_delta(interval):
2066
784
    """Parse a string and return a datetime.timedelta
2067
 
    
 
785
 
2068
786
    >>> string_to_delta('7d')
2069
787
    datetime.timedelta(7)
2070
788
    >>> string_to_delta('60s')
2073
791
    datetime.timedelta(0, 3600)
2074
792
    >>> string_to_delta('24h')
2075
793
    datetime.timedelta(1)
2076
 
    >>> string_to_delta('1w')
 
794
    >>> string_to_delta(u'1w')
2077
795
    datetime.timedelta(7)
2078
796
    >>> string_to_delta('5m 30s')
2079
797
    datetime.timedelta(0, 330)
2083
801
        try:
2084
802
            suffix = unicode(s[-1])
2085
803
            value = int(s[:-1])
2086
 
            if suffix == "d":
 
804
            if suffix == u"d":
2087
805
                delta = datetime.timedelta(value)
2088
 
            elif suffix == "s":
 
806
            elif suffix == u"s":
2089
807
                delta = datetime.timedelta(0, value)
2090
 
            elif suffix == "m":
 
808
            elif suffix == u"m":
2091
809
                delta = datetime.timedelta(0, 0, 0, 0, value)
2092
 
            elif suffix == "h":
 
810
            elif suffix == u"h":
2093
811
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2094
 
            elif suffix == "w":
 
812
            elif suffix == u"w":
2095
813
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2096
814
            else:
2097
 
                raise ValueError("Unknown suffix {0!r}"
2098
 
                                 .format(suffix))
2099
 
        except (ValueError, IndexError) as e:
2100
 
            raise ValueError(*(e.args))
 
815
                raise ValueError
 
816
        except (ValueError, IndexError):
 
817
            raise ValueError
2101
818
        timevalue += delta
2102
819
    return timevalue
2103
820
 
2104
821
 
 
822
def server_state_changed(state):
 
823
    """Derived from the Avahi example code"""
 
824
    if state == avahi.SERVER_COLLISION:
 
825
        logger.error(u"Zeroconf server name collision")
 
826
        service.remove()
 
827
    elif state == avahi.SERVER_RUNNING:
 
828
        service.add()
 
829
 
 
830
 
 
831
def entry_group_state_changed(state, error):
 
832
    """Derived from the Avahi example code"""
 
833
    logger.debug(u"Avahi state change: %i", state)
 
834
    
 
835
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
836
        logger.debug(u"Zeroconf service established.")
 
837
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
838
        logger.warning(u"Zeroconf service name collision.")
 
839
        service.rename()
 
840
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
841
        logger.critical(u"Avahi: Error in group state changed %s",
 
842
                        unicode(error))
 
843
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
844
 
 
845
def if_nametoindex(interface):
 
846
    """Call the C function if_nametoindex(), or equivalent"""
 
847
    global if_nametoindex
 
848
    try:
 
849
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
850
                          (ctypes.util.find_library("c"))
 
851
                          .if_nametoindex)
 
852
    except (OSError, AttributeError):
 
853
        if "struct" not in sys.modules:
 
854
            import struct
 
855
        if "fcntl" not in sys.modules:
 
856
            import fcntl
 
857
        def if_nametoindex(interface):
 
858
            "Get an interface index the hard way, i.e. using fcntl()"
 
859
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
860
            with closing(socket.socket()) as s:
 
861
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
862
                                    struct.pack("16s16x", interface))
 
863
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
864
            return interface_index
 
865
    return if_nametoindex(interface)
 
866
 
 
867
 
2105
868
def daemon(nochdir = False, noclose = False):
2106
869
    """See daemon(3).  Standard BSD Unix function.
2107
 
    
2108
870
    This should really exist as os.daemon, but it doesn't (yet)."""
2109
871
    if os.fork():
2110
872
        sys.exit()
2115
877
        sys.exit()
2116
878
    if not noclose:
2117
879
        # Close all standard open file descriptors
2118
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
880
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2119
881
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2120
882
            raise OSError(errno.ENODEV,
2121
 
                          "{0} not a character device"
2122
 
                          .format(os.devnull))
 
883
                          "/dev/null not a character device")
2123
884
        os.dup2(null, sys.stdin.fileno())
2124
885
        os.dup2(null, sys.stdout.fileno())
2125
886
        os.dup2(null, sys.stderr.fileno())
2128
889
 
2129
890
 
2130
891
def main():
2131
 
    
2132
 
    ##################################################################
2133
 
    # Parsing of options, both command line and config file
2134
 
    
2135
 
    parser = argparse.ArgumentParser()
2136
 
    parser.add_argument("-v", "--version", action="version",
2137
 
                        version = "%(prog)s {0}".format(version),
2138
 
                        help="show version number and exit")
2139
 
    parser.add_argument("-i", "--interface", metavar="IF",
2140
 
                        help="Bind to interface IF")
2141
 
    parser.add_argument("-a", "--address",
2142
 
                        help="Address to listen for requests on")
2143
 
    parser.add_argument("-p", "--port", type=int,
2144
 
                        help="Port number to receive requests on")
2145
 
    parser.add_argument("--check", action="store_true",
2146
 
                        help="Run self-test")
2147
 
    parser.add_argument("--debug", action="store_true",
2148
 
                        help="Debug mode; run in foreground and log"
2149
 
                        " to terminal")
2150
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2151
 
                        help="Debug level for stdout output")
2152
 
    parser.add_argument("--priority", help="GnuTLS"
2153
 
                        " priority string (see GnuTLS documentation)")
2154
 
    parser.add_argument("--servicename",
2155
 
                        metavar="NAME", help="Zeroconf service name")
2156
 
    parser.add_argument("--configdir",
2157
 
                        default="/etc/mandos", metavar="DIR",
2158
 
                        help="Directory to search for configuration"
2159
 
                        " files")
2160
 
    parser.add_argument("--no-dbus", action="store_false",
2161
 
                        dest="use_dbus", help="Do not provide D-Bus"
2162
 
                        " system bus interface")
2163
 
    parser.add_argument("--no-ipv6", action="store_false",
2164
 
                        dest="use_ipv6", help="Do not use IPv6")
2165
 
    parser.add_argument("--no-restore", action="store_false",
2166
 
                        dest="restore", help="Do not restore stored"
2167
 
                        " state")
2168
 
    parser.add_argument("--statedir", metavar="DIR",
2169
 
                        help="Directory to save/restore state in")
2170
 
    
2171
 
    options = parser.parse_args()
 
892
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
893
    parser.add_option("-i", "--interface", type="string",
 
894
                      metavar="IF", help="Bind to interface IF")
 
895
    parser.add_option("-a", "--address", type="string",
 
896
                      help="Address to listen for requests on")
 
897
    parser.add_option("-p", "--port", type="int",
 
898
                      help="Port number to receive requests on")
 
899
    parser.add_option("--check", action="store_true",
 
900
                      help="Run self-test")
 
901
    parser.add_option("--debug", action="store_true",
 
902
                      help="Debug mode; run in foreground and log to"
 
903
                      " terminal")
 
904
    parser.add_option("--priority", type="string", help="GnuTLS"
 
905
                      " priority string (see GnuTLS documentation)")
 
906
    parser.add_option("--servicename", type="string", metavar="NAME",
 
907
                      help="Zeroconf service name")
 
908
    parser.add_option("--configdir", type="string",
 
909
                      default="/etc/mandos", metavar="DIR",
 
910
                      help="Directory to search for configuration"
 
911
                      " files")
 
912
    parser.add_option("--no-dbus", action="store_false",
 
913
                      dest="use_dbus",
 
914
                      help="Do not provide D-Bus system bus"
 
915
                      " interface")
 
916
    options = parser.parse_args()[0]
2172
917
    
2173
918
    if options.check:
2174
919
        import doctest
2184
929
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2185
930
                        "servicename": "Mandos",
2186
931
                        "use_dbus": "True",
2187
 
                        "use_ipv6": "True",
2188
 
                        "debuglevel": "",
2189
 
                        "restore": "True",
2190
 
                        "statedir": "/var/lib/mandos"
2191
932
                        }
2192
933
    
2193
934
    # Parse config file for server-global settings
2194
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
935
    server_config = ConfigParser.SafeConfigParser(server_defaults)
2195
936
    del server_defaults
2196
 
    server_config.read(os.path.join(options.configdir,
2197
 
                                    "mandos.conf"))
 
937
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2198
938
    # Convert the SafeConfigParser object to a dict
2199
939
    server_settings = server_config.defaults()
2200
 
    # Use the appropriate methods on the non-string config options
2201
 
    for option in ("debug", "use_dbus", "use_ipv6"):
2202
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2203
 
                                                           option)
2204
 
    if server_settings["port"]:
2205
 
        server_settings["port"] = server_config.getint("DEFAULT",
2206
 
                                                       "port")
 
940
    # Use getboolean on the boolean config options
 
941
    server_settings["debug"] = (server_config.getboolean
 
942
                                ("DEFAULT", "debug"))
 
943
    server_settings["use_dbus"] = (server_config.getboolean
 
944
                                   ("DEFAULT", "use_dbus"))
2207
945
    del server_config
2208
946
    
2209
947
    # Override the settings from the config file with command line
2210
948
    # options, if set.
2211
949
    for option in ("interface", "address", "port", "debug",
2212
950
                   "priority", "servicename", "configdir",
2213
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2214
 
                   "statedir"):
 
951
                   "use_dbus"):
2215
952
        value = getattr(options, option)
2216
953
        if value is not None:
2217
954
            server_settings[option] = value
2218
955
    del options
2219
 
    # Force all strings to be unicode
2220
 
    for option in server_settings.keys():
2221
 
        if type(server_settings[option]) is str:
2222
 
            server_settings[option] = unicode(server_settings[option])
2223
956
    # Now we have our good server settings in "server_settings"
2224
957
    
2225
 
    ##################################################################
2226
 
    
2227
958
    # For convenience
2228
959
    debug = server_settings["debug"]
2229
 
    debuglevel = server_settings["debuglevel"]
2230
960
    use_dbus = server_settings["use_dbus"]
2231
 
    use_ipv6 = server_settings["use_ipv6"]
2232
 
    stored_state_path = os.path.join(server_settings["statedir"],
2233
 
                                     stored_state_file)
2234
961
    
2235
 
    if debug:
2236
 
        initlogger(debug, logging.DEBUG)
2237
 
    else:
2238
 
        if not debuglevel:
2239
 
            initlogger(debug)
2240
 
        else:
2241
 
            level = getattr(logging, debuglevel.upper())
2242
 
            initlogger(debug, level)
 
962
    if not debug:
 
963
        syslogger.setLevel(logging.WARNING)
 
964
        console.setLevel(logging.WARNING)
2243
965
    
2244
966
    if server_settings["servicename"] != "Mandos":
2245
967
        syslogger.setFormatter(logging.Formatter
2246
 
                               ('Mandos ({0}) [%(process)d]:'
2247
 
                                ' %(levelname)s: %(message)s'
2248
 
                                .format(server_settings
2249
 
                                        ["servicename"])))
 
968
                               ('Mandos (%s): %%(levelname)s:'
 
969
                                ' %%(message)s'
 
970
                                % server_settings["servicename"]))
2250
971
    
2251
972
    # Parse config file with clients
2252
 
    client_config = configparser.SafeConfigParser(Client
2253
 
                                                  .client_defaults)
 
973
    client_defaults = { "timeout": "1h",
 
974
                        "interval": "5m",
 
975
                        "checker": "fping -q -- %%(host)s",
 
976
                        "host": "",
 
977
                        }
 
978
    client_config = ConfigParser.SafeConfigParser(client_defaults)
2254
979
    client_config.read(os.path.join(server_settings["configdir"],
2255
980
                                    "clients.conf"))
2256
981
    
2257
 
    global mandos_dbus_service
2258
 
    mandos_dbus_service = None
2259
 
    
2260
 
    tcp_server = MandosServer((server_settings["address"],
2261
 
                               server_settings["port"]),
2262
 
                              ClientHandler,
2263
 
                              interface=(server_settings["interface"]
2264
 
                                         or None),
2265
 
                              use_ipv6=use_ipv6,
2266
 
                              gnutls_priority=
2267
 
                              server_settings["priority"],
2268
 
                              use_dbus=use_dbus)
2269
 
    if not debug:
2270
 
        pidfilename = "/var/run/mandos.pid"
2271
 
        try:
2272
 
            pidfile = open(pidfilename, "w")
2273
 
        except IOError as e:
2274
 
            logger.error("Could not open file %r", pidfilename,
2275
 
                         exc_info=e)
2276
 
    
2277
 
    for name in ("_mandos", "mandos", "nobody"):
2278
 
        try:
2279
 
            uid = pwd.getpwnam(name).pw_uid
2280
 
            gid = pwd.getpwnam(name).pw_gid
2281
 
            break
 
982
    clients = Set()
 
983
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
984
                                 server_settings["port"]),
 
985
                                TCP_handler,
 
986
                                settings=server_settings,
 
987
                                clients=clients)
 
988
    pidfilename = "/var/run/mandos.pid"
 
989
    try:
 
990
        pidfile = open(pidfilename, "w")
 
991
    except IOError, error:
 
992
        logger.error("Could not open file %r", pidfilename)
 
993
    
 
994
    try:
 
995
        uid = pwd.getpwnam("_mandos").pw_uid
 
996
        gid = pwd.getpwnam("_mandos").pw_gid
 
997
    except KeyError:
 
998
        try:
 
999
            uid = pwd.getpwnam("mandos").pw_uid
 
1000
            gid = pwd.getpwnam("mandos").pw_gid
2282
1001
        except KeyError:
2283
 
            continue
2284
 
    else:
2285
 
        uid = 65534
2286
 
        gid = 65534
 
1002
            try:
 
1003
                uid = pwd.getpwnam("nobody").pw_uid
 
1004
                gid = pwd.getpwnam("nogroup").pw_gid
 
1005
            except KeyError:
 
1006
                uid = 65534
 
1007
                gid = 65534
2287
1008
    try:
 
1009
        os.setuid(uid)
2288
1010
        os.setgid(gid)
2289
 
        os.setuid(uid)
2290
 
    except OSError as error:
2291
 
        if error.errno != errno.EPERM:
 
1011
    except OSError, error:
 
1012
        if error[0] != errno.EPERM:
2292
1013
            raise error
2293
1014
    
2294
 
    if debug:
2295
 
        # Enable all possible GnuTLS debugging
2296
 
        
2297
 
        # "Use a log level over 10 to enable all debugging options."
2298
 
        # - GnuTLS manual
2299
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2300
 
        
2301
 
        @gnutls.library.types.gnutls_log_func
2302
 
        def debug_gnutls(level, string):
2303
 
            logger.debug("GnuTLS: %s", string[:-1])
2304
 
        
2305
 
        (gnutls.library.functions
2306
 
         .gnutls_global_set_log_function(debug_gnutls))
2307
 
        
2308
 
        # Redirect stdin so all checkers get /dev/null
2309
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2310
 
        os.dup2(null, sys.stdin.fileno())
2311
 
        if null > 2:
2312
 
            os.close(null)
2313
 
    
2314
 
    # Need to fork before connecting to D-Bus
2315
 
    if not debug:
2316
 
        # Close all input and output, do double fork, etc.
2317
 
        daemon()
2318
 
    
2319
 
    gobject.threads_init()
 
1015
    global service
 
1016
    service = AvahiService(name = server_settings["servicename"],
 
1017
                           servicetype = "_mandos._tcp", )
 
1018
    if server_settings["interface"]:
 
1019
        service.interface = (if_nametoindex
 
1020
                             (server_settings["interface"]))
2320
1021
    
2321
1022
    global main_loop
 
1023
    global bus
 
1024
    global server
2322
1025
    # From the Avahi example code
2323
 
    DBusGMainLoop(set_as_default=True)
 
1026
    DBusGMainLoop(set_as_default=True )
2324
1027
    main_loop = gobject.MainLoop()
2325
1028
    bus = dbus.SystemBus()
 
1029
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1030
                                           avahi.DBUS_PATH_SERVER),
 
1031
                            avahi.DBUS_INTERFACE_SERVER)
2326
1032
    # End of Avahi example code
2327
1033
    if use_dbus:
2328
 
        try:
2329
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2330
 
                                            bus, do_not_queue=True)
2331
 
            old_bus_name = (dbus.service.BusName
2332
 
                            ("se.bsnet.fukt.Mandos", bus,
2333
 
                             do_not_queue=True))
2334
 
        except dbus.exceptions.NameExistsException as e:
2335
 
            logger.error("Disabling D-Bus:", exc_info=e)
2336
 
            use_dbus = False
2337
 
            server_settings["use_dbus"] = False
2338
 
            tcp_server.use_dbus = False
2339
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2340
 
    service = AvahiServiceToSyslog(name =
2341
 
                                   server_settings["servicename"],
2342
 
                                   servicetype = "_mandos._tcp",
2343
 
                                   protocol = protocol, bus = bus)
2344
 
    if server_settings["interface"]:
2345
 
        service.interface = (if_nametoindex
2346
 
                             (str(server_settings["interface"])))
2347
 
    
2348
 
    global multiprocessing_manager
2349
 
    multiprocessing_manager = multiprocessing.Manager()
2350
 
    
2351
 
    client_class = Client
2352
 
    if use_dbus:
2353
 
        client_class = functools.partial(ClientDBus, bus = bus)
2354
 
    
2355
 
    client_settings = Client.config_parser(client_config)
2356
 
    old_client_settings = {}
2357
 
    clients_data = {}
2358
 
    
2359
 
    # Get client data and settings from last running state.
2360
 
    if server_settings["restore"]:
2361
 
        try:
2362
 
            with open(stored_state_path, "rb") as stored_state:
2363
 
                clients_data, old_client_settings = (pickle.load
2364
 
                                                     (stored_state))
2365
 
            os.remove(stored_state_path)
2366
 
        except IOError as e:
2367
 
            if e.errno == errno.ENOENT:
2368
 
                logger.warning("Could not load persistent state: {0}"
2369
 
                                .format(os.strerror(e.errno)))
2370
 
            else:
2371
 
                logger.critical("Could not load persistent state:",
2372
 
                                exc_info=e)
2373
 
                raise
2374
 
        except EOFError as e:
2375
 
            logger.warning("Could not load persistent state: "
2376
 
                           "EOFError:", exc_info=e)
2377
 
    
2378
 
    with PGPEngine() as pgp:
2379
 
        for client_name, client in clients_data.iteritems():
2380
 
            # Decide which value to use after restoring saved state.
2381
 
            # We have three different values: Old config file,
2382
 
            # new config file, and saved state.
2383
 
            # New config value takes precedence if it differs from old
2384
 
            # config value, otherwise use saved state.
2385
 
            for name, value in client_settings[client_name].items():
2386
 
                try:
2387
 
                    # For each value in new config, check if it
2388
 
                    # differs from the old config value (Except for
2389
 
                    # the "secret" attribute)
2390
 
                    if (name != "secret" and
2391
 
                        value != old_client_settings[client_name]
2392
 
                        [name]):
2393
 
                        client[name] = value
2394
 
                except KeyError:
2395
 
                    pass
2396
 
            
2397
 
            # Clients who has passed its expire date can still be
2398
 
            # enabled if its last checker was successful.  Clients
2399
 
            # whose checker succeeded before we stored its state is
2400
 
            # assumed to have successfully run all checkers during
2401
 
            # downtime.
2402
 
            if client["enabled"]:
2403
 
                if datetime.datetime.utcnow() >= client["expires"]:
2404
 
                    if not client["last_checked_ok"]:
2405
 
                        logger.warning(
2406
 
                            "disabling client {0} - Client never "
2407
 
                            "performed a successful checker"
2408
 
                            .format(client_name))
2409
 
                        client["enabled"] = False
2410
 
                    elif client["last_checker_status"] != 0:
2411
 
                        logger.warning(
2412
 
                            "disabling client {0} - Client "
2413
 
                            "last checker failed with error code {1}"
2414
 
                            .format(client_name,
2415
 
                                    client["last_checker_status"]))
2416
 
                        client["enabled"] = False
2417
 
                    else:
2418
 
                        client["expires"] = (datetime.datetime
2419
 
                                             .utcnow()
2420
 
                                             + client["timeout"])
2421
 
                        logger.debug("Last checker succeeded,"
2422
 
                                     " keeping {0} enabled"
2423
 
                                     .format(client_name))
2424
 
            try:
2425
 
                client["secret"] = (
2426
 
                    pgp.decrypt(client["encrypted_secret"],
2427
 
                                client_settings[client_name]
2428
 
                                ["secret"]))
2429
 
            except PGPError:
2430
 
                # If decryption fails, we use secret from new settings
2431
 
                logger.debug("Failed to decrypt {0} old secret"
2432
 
                             .format(client_name))
2433
 
                client["secret"] = (
2434
 
                    client_settings[client_name]["secret"])
2435
 
    
2436
 
    # Add/remove clients based on new changes made to config
2437
 
    for client_name in (set(old_client_settings)
2438
 
                        - set(client_settings)):
2439
 
        del clients_data[client_name]
2440
 
    for client_name in (set(client_settings)
2441
 
                        - set(old_client_settings)):
2442
 
        clients_data[client_name] = client_settings[client_name]
2443
 
    
2444
 
    # Create all client objects
2445
 
    for client_name, client in clients_data.iteritems():
2446
 
        tcp_server.clients[client_name] = client_class(
2447
 
            name = client_name, settings = client)
2448
 
    
2449
 
    if not tcp_server.clients:
2450
 
        logger.warning("No clients defined")
 
1034
        bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
 
1035
                                        bus)
 
1036
    
 
1037
    clients.update(Set(Client(name = section,
 
1038
                              config
 
1039
                              = dict(client_config.items(section)),
 
1040
                              use_dbus = use_dbus)
 
1041
                       for section in client_config.sections()))
 
1042
    if not clients:
 
1043
        logger.warning(u"No clients defined")
 
1044
    
 
1045
    if debug:
 
1046
        # Redirect stdin so all checkers get /dev/null
 
1047
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1048
        os.dup2(null, sys.stdin.fileno())
 
1049
        if null > 2:
 
1050
            os.close(null)
 
1051
    else:
 
1052
        # No console logging
 
1053
        logger.removeHandler(console)
 
1054
        # Close all input and output, do double fork, etc.
 
1055
        daemon()
 
1056
    
 
1057
    try:
 
1058
        pid = os.getpid()
 
1059
        pidfile.write(str(pid) + "\n")
 
1060
        pidfile.close()
 
1061
        del pidfile
 
1062
    except IOError:
 
1063
        logger.error(u"Could not write to file %r with PID %d",
 
1064
                     pidfilename, pid)
 
1065
    except NameError:
 
1066
        # "pidfile" was never created
 
1067
        pass
 
1068
    del pidfilename
 
1069
    
 
1070
    def cleanup():
 
1071
        "Cleanup function; run on exit"
 
1072
        global group
 
1073
        # From the Avahi example code
 
1074
        if not group is None:
 
1075
            group.Free()
 
1076
            group = None
 
1077
        # End of Avahi example code
 
1078
        
 
1079
        while clients:
 
1080
            client = clients.pop()
 
1081
            client.disable_hook = None
 
1082
            client.disable()
 
1083
    
 
1084
    atexit.register(cleanup)
2451
1085
    
2452
1086
    if not debug:
2453
 
        try:
2454
 
            with pidfile:
2455
 
                pid = os.getpid()
2456
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
2457
 
            del pidfile
2458
 
        except IOError:
2459
 
            logger.error("Could not write to file %r with PID %d",
2460
 
                         pidfilename, pid)
2461
 
        except NameError:
2462
 
            # "pidfile" was never created
2463
 
            pass
2464
 
        del pidfilename
2465
 
    
 
1087
        signal.signal(signal.SIGINT, signal.SIG_IGN)
2466
1088
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2467
1089
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2468
1090
    
2469
1091
    if use_dbus:
2470
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2471
 
                                        "se.bsnet.fukt.Mandos"})
2472
 
        class MandosDBusService(DBusObjectWithProperties):
 
1092
        class MandosServer(dbus.service.Object):
2473
1093
            """A D-Bus proxy object"""
2474
1094
            def __init__(self):
2475
 
                dbus.service.Object.__init__(self, bus, "/")
2476
 
            _interface = "se.recompile.Mandos"
2477
 
            
2478
 
            @dbus_interface_annotations(_interface)
2479
 
            def _foo(self):
2480
 
                return { "org.freedesktop.DBus.Property"
2481
 
                         ".EmitsChangedSignal":
2482
 
                             "false"}
2483
 
            
 
1095
                dbus.service.Object.__init__(self, bus,
 
1096
                                             "/Mandos")
 
1097
            _interface = u"org.mandos_system.Mandos"
 
1098
 
 
1099
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1100
            def ClientAdded(self, objpath, properties):
 
1101
                "D-Bus signal"
 
1102
                pass
 
1103
 
2484
1104
            @dbus.service.signal(_interface, signature="o")
2485
 
            def ClientAdded(self, objpath):
2486
 
                "D-Bus signal"
2487
 
                pass
2488
 
            
2489
 
            @dbus.service.signal(_interface, signature="ss")
2490
 
            def ClientNotFound(self, fingerprint, address):
2491
 
                "D-Bus signal"
2492
 
                pass
2493
 
            
2494
 
            @dbus.service.signal(_interface, signature="os")
2495
 
            def ClientRemoved(self, objpath, name):
2496
 
                "D-Bus signal"
2497
 
                pass
2498
 
            
 
1105
            def ClientRemoved(self, objpath):
 
1106
                "D-Bus signal"
 
1107
                pass
 
1108
 
2499
1109
            @dbus.service.method(_interface, out_signature="ao")
2500
1110
            def GetAllClients(self):
2501
 
                "D-Bus method"
2502
 
                return dbus.Array(c.dbus_object_path
2503
 
                                  for c in
2504
 
                                  tcp_server.clients.itervalues())
2505
 
            
2506
 
            @dbus.service.method(_interface,
2507
 
                                 out_signature="a{oa{sv}}")
 
1111
                return dbus.Array(c.dbus_object_path for c in clients)
 
1112
 
 
1113
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
2508
1114
            def GetAllClientsWithProperties(self):
2509
 
                "D-Bus method"
2510
1115
                return dbus.Dictionary(
2511
 
                    ((c.dbus_object_path, c.GetAll(""))
2512
 
                     for c in tcp_server.clients.itervalues()),
 
1116
                    ((c.dbus_object_path, c.GetAllProperties())
 
1117
                     for c in clients),
2513
1118
                    signature="oa{sv}")
2514
 
            
 
1119
 
2515
1120
            @dbus.service.method(_interface, in_signature="o")
2516
1121
            def RemoveClient(self, object_path):
2517
 
                "D-Bus method"
2518
 
                for c in tcp_server.clients.itervalues():
 
1122
                for c in clients:
2519
1123
                    if c.dbus_object_path == object_path:
2520
 
                        del tcp_server.clients[c.name]
2521
 
                        c.remove_from_connection()
 
1124
                        clients.remove(c)
2522
1125
                        # Don't signal anything except ClientRemoved
2523
 
                        c.disable(quiet=True)
 
1126
                        c.use_dbus = False
 
1127
                        c.disable()
2524
1128
                        # Emit D-Bus signal
2525
 
                        self.ClientRemoved(object_path, c.name)
 
1129
                        self.ClientRemoved(object_path)
2526
1130
                        return
2527
 
                raise KeyError(object_path)
2528
 
            
 
1131
                raise KeyError
 
1132
            @dbus.service.method(_interface)
 
1133
            def Quit(self):
 
1134
                main_loop.quit()
 
1135
 
2529
1136
            del _interface
2530
 
        
2531
 
        mandos_dbus_service = MandosDBusService()
2532
 
    
2533
 
    def cleanup():
2534
 
        "Cleanup function; run on exit"
2535
 
        service.cleanup()
2536
 
        
2537
 
        multiprocessing.active_children()
2538
 
        if not (tcp_server.clients or client_settings):
2539
 
            return
2540
 
        
2541
 
        # Store client before exiting. Secrets are encrypted with key
2542
 
        # based on what config file has. If config file is
2543
 
        # removed/edited, old secret will thus be unrecovable.
2544
 
        clients = {}
2545
 
        with PGPEngine() as pgp:
2546
 
            for client in tcp_server.clients.itervalues():
2547
 
                key = client_settings[client.name]["secret"]
2548
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2549
 
                                                      key)
2550
 
                client_dict = {}
2551
 
                
2552
 
                # A list of attributes that can not be pickled
2553
 
                # + secret.
2554
 
                exclude = set(("bus", "changedstate", "secret",
2555
 
                               "checker"))
2556
 
                for name, typ in (inspect.getmembers
2557
 
                                  (dbus.service.Object)):
2558
 
                    exclude.add(name)
2559
 
                
2560
 
                client_dict["encrypted_secret"] = (client
2561
 
                                                   .encrypted_secret)
2562
 
                for attr in client.client_structure:
2563
 
                    if attr not in exclude:
2564
 
                        client_dict[attr] = getattr(client, attr)
2565
 
                
2566
 
                clients[client.name] = client_dict
2567
 
                del client_settings[client.name]["secret"]
2568
 
        
2569
 
        try:
2570
 
            with (tempfile.NamedTemporaryFile
2571
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2572
 
                   dir=os.path.dirname(stored_state_path),
2573
 
                   delete=False)) as stored_state:
2574
 
                pickle.dump((clients, client_settings), stored_state)
2575
 
                tempname=stored_state.name
2576
 
            os.rename(tempname, stored_state_path)
2577
 
        except (IOError, OSError) as e:
2578
 
            if not debug:
2579
 
                try:
2580
 
                    os.remove(tempname)
2581
 
                except NameError:
2582
 
                    pass
2583
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2584
 
                logger.warning("Could not save persistent state: {0}"
2585
 
                               .format(os.strerror(e.errno)))
2586
 
            else:
2587
 
                logger.warning("Could not save persistent state:",
2588
 
                               exc_info=e)
2589
 
                raise e
2590
 
        
2591
 
        # Delete all clients, and settings from config
2592
 
        while tcp_server.clients:
2593
 
            name, client = tcp_server.clients.popitem()
2594
 
            if use_dbus:
2595
 
                client.remove_from_connection()
2596
 
            # Don't signal anything except ClientRemoved
2597
 
            client.disable(quiet=True)
2598
 
            if use_dbus:
2599
 
                # Emit D-Bus signal
2600
 
                mandos_dbus_service.ClientRemoved(client
2601
 
                                                  .dbus_object_path,
2602
 
                                                  client.name)
2603
 
        client_settings.clear()
2604
 
    
2605
 
    atexit.register(cleanup)
2606
 
    
2607
 
    for client in tcp_server.clients.itervalues():
 
1137
    
 
1138
        mandos_server = MandosServer()
 
1139
    
 
1140
    for client in clients:
2608
1141
        if use_dbus:
2609
1142
            # Emit D-Bus signal
2610
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2611
 
        # Need to initiate checking of clients
2612
 
        if client.enabled:
2613
 
            client.init_checker()
 
1143
            mandos_server.ClientAdded(client.dbus_object_path,
 
1144
                                      client.GetAllProperties())
 
1145
        client.enable()
2614
1146
    
2615
1147
    tcp_server.enable()
2616
1148
    tcp_server.server_activate()
2617
1149
    
2618
1150
    # Find out what port we got
2619
1151
    service.port = tcp_server.socket.getsockname()[1]
2620
 
    if use_ipv6:
2621
 
        logger.info("Now listening on address %r, port %d,"
2622
 
                    " flowinfo %d, scope_id %d",
2623
 
                    *tcp_server.socket.getsockname())
2624
 
    else:                       # IPv4
2625
 
        logger.info("Now listening on address %r, port %d",
2626
 
                    *tcp_server.socket.getsockname())
 
1152
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
1153
                u" scope_id %d" % tcp_server.socket.getsockname())
2627
1154
    
2628
1155
    #service.interface = tcp_server.socket.getsockname()[3]
2629
1156
    
2630
1157
    try:
2631
1158
        # From the Avahi example code
 
1159
        server.connect_to_signal("StateChanged", server_state_changed)
2632
1160
        try:
2633
 
            service.activate()
2634
 
        except dbus.exceptions.DBusException as error:
2635
 
            logger.critical("D-Bus Exception", exc_info=error)
2636
 
            cleanup()
 
1161
            server_state_changed(server.GetState())
 
1162
        except dbus.exceptions.DBusException, error:
 
1163
            logger.critical(u"DBusException: %s", error)
2637
1164
            sys.exit(1)
2638
1165
        # End of Avahi example code
2639
1166
        
2642
1169
                             (tcp_server.handle_request
2643
1170
                              (*args[2:], **kwargs) or True))
2644
1171
        
2645
 
        logger.debug("Starting main loop")
 
1172
        logger.debug(u"Starting main loop")
2646
1173
        main_loop.run()
2647
 
    except AvahiError as error:
2648
 
        logger.critical("Avahi Error", exc_info=error)
2649
 
        cleanup()
 
1174
    except AvahiError, error:
 
1175
        logger.critical(u"AvahiError: %s", error)
2650
1176
        sys.exit(1)
2651
1177
    except KeyboardInterrupt:
2652
1178
        if debug:
2653
 
            print("", file=sys.stderr)
2654
 
        logger.debug("Server received KeyboardInterrupt")
2655
 
    logger.debug("Server exiting")
2656
 
    # Must run before the D-Bus bus name gets deregistered
2657
 
    cleanup()
 
1179
            print
2658
1180
 
2659
1181
if __name__ == '__main__':
2660
1182
    main()