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  • Committer: Teddy Hogeborn
  • Date: 2008-07-22 06:23:59 UTC
  • mfrom: (24.1.1 mandos)
  • Revision ID: teddy@fukt.bsnet.se-20080722062359-qti3ecst69bq3ltk
Merge.

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1
 
#!/usr/bin/python2.7
 
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
4
4
# Mandos server - give out binary blobs to connecting clients.
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# following functions: "add_service", "remove_service",
 
10
# "server_state_changed", "entry_group_state_changed", and some lines
 
11
# in "main".
12
12
13
 
# Everything else is
14
 
# Copyright © 2008-2015 Teddy Hogeborn
15
 
# Copyright © 2008-2015 Björn Påhlsson
 
13
# Everything else is Copyright © 2007-2008 Teddy Hogeborn and Björn
 
14
# Påhlsson.
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
25
24
#     GNU General Public License for more details.
26
25
27
26
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
31
 
# Contact the authors at <mandos@recompile.se>.
32
 
33
 
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
from future_builtins import *
38
 
 
39
 
try:
40
 
    import SocketServer as socketserver
41
 
except ImportError:
42
 
    import socketserver
 
27
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
28
 
29
# Contact the authors at <https://www.fukt.bsnet.se/~belorn/> and
 
30
# <https://www.fukt.bsnet.se/~teddy/>.
 
31
 
32
 
 
33
from __future__ import division
 
34
 
 
35
import SocketServer
43
36
import socket
44
 
import argparse
 
37
import select
 
38
from optparse import OptionParser
45
39
import datetime
46
40
import errno
47
41
import gnutls.crypto
50
44
import gnutls.library.functions
51
45
import gnutls.library.constants
52
46
import gnutls.library.types
53
 
try:
54
 
    import ConfigParser as configparser
55
 
except ImportError:
56
 
    import configparser
 
47
import ConfigParser
57
48
import sys
58
49
import re
59
50
import os
60
51
import signal
 
52
from sets import Set
61
53
import subprocess
62
54
import atexit
63
55
import stat
64
56
import logging
65
57
import logging.handlers
66
 
import pwd
67
 
import contextlib
68
 
import struct
69
 
import fcntl
70
 
import functools
71
 
try:
72
 
    import cPickle as pickle
73
 
except ImportError:
74
 
    import pickle
75
 
import multiprocessing
76
 
import types
77
 
import binascii
78
 
import tempfile
79
 
import itertools
80
 
import collections
81
 
import codecs
82
58
 
83
59
import dbus
84
 
import dbus.service
85
 
try:
86
 
    import gobject
87
 
except ImportError:
88
 
    from gi.repository import GObject as gobject
 
60
import gobject
89
61
import avahi
90
62
from dbus.mainloop.glib import DBusGMainLoop
91
63
import ctypes
92
 
import ctypes.util
93
 
import xml.dom.minidom
94
 
import inspect
95
 
 
96
 
try:
97
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
98
 
except AttributeError:
99
 
    try:
100
 
        from IN import SO_BINDTODEVICE
101
 
    except ImportError:
102
 
        SO_BINDTODEVICE = None
103
 
 
104
 
if sys.version_info.major == 2:
105
 
    str = unicode
106
 
 
107
 
version = "1.6.9"
108
 
stored_state_file = "clients.pickle"
109
 
 
110
 
logger = logging.getLogger()
111
 
syslogger = None
112
 
 
113
 
try:
114
 
    if_nametoindex = ctypes.cdll.LoadLibrary(
115
 
        ctypes.util.find_library("c")).if_nametoindex
116
 
except (OSError, AttributeError):
117
 
    
118
 
    def if_nametoindex(interface):
119
 
        "Get an interface index the hard way, i.e. using fcntl()"
120
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
121
 
        with contextlib.closing(socket.socket()) as s:
122
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
123
 
                                struct.pack(b"16s16x", interface))
124
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
125
 
        return interface_index
126
 
 
127
 
 
128
 
def initlogger(debug, level=logging.WARNING):
129
 
    """init logger and add loglevel"""
130
 
    
131
 
    global syslogger
132
 
    syslogger = (logging.handlers.SysLogHandler(
133
 
        facility = logging.handlers.SysLogHandler.LOG_DAEMON,
134
 
        address = "/dev/log"))
135
 
    syslogger.setFormatter(logging.Formatter
136
 
                           ('Mandos [%(process)d]: %(levelname)s:'
137
 
                            ' %(message)s'))
138
 
    logger.addHandler(syslogger)
139
 
    
140
 
    if debug:
141
 
        console = logging.StreamHandler()
142
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
143
 
                                               ' [%(process)d]:'
144
 
                                               ' %(levelname)s:'
145
 
                                               ' %(message)s'))
146
 
        logger.addHandler(console)
147
 
    logger.setLevel(level)
148
 
 
149
 
 
150
 
class PGPError(Exception):
151
 
    """Exception if encryption/decryption fails"""
152
 
    pass
153
 
 
154
 
 
155
 
class PGPEngine(object):
156
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
157
 
    
158
 
    def __init__(self):
159
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
160
 
        self.gnupgargs = ['--batch',
161
 
                          '--home', self.tempdir,
162
 
                          '--force-mdc',
163
 
                          '--quiet',
164
 
                          '--no-use-agent']
165
 
    
166
 
    def __enter__(self):
167
 
        return self
168
 
    
169
 
    def __exit__(self, exc_type, exc_value, traceback):
170
 
        self._cleanup()
171
 
        return False
172
 
    
173
 
    def __del__(self):
174
 
        self._cleanup()
175
 
    
176
 
    def _cleanup(self):
177
 
        if self.tempdir is not None:
178
 
            # Delete contents of tempdir
179
 
            for root, dirs, files in os.walk(self.tempdir,
180
 
                                             topdown = False):
181
 
                for filename in files:
182
 
                    os.remove(os.path.join(root, filename))
183
 
                for dirname in dirs:
184
 
                    os.rmdir(os.path.join(root, dirname))
185
 
            # Remove tempdir
186
 
            os.rmdir(self.tempdir)
187
 
            self.tempdir = None
188
 
    
189
 
    def password_encode(self, password):
190
 
        # Passphrase can not be empty and can not contain newlines or
191
 
        # NUL bytes.  So we prefix it and hex encode it.
192
 
        encoded = b"mandos" + binascii.hexlify(password)
193
 
        if len(encoded) > 2048:
194
 
            # GnuPG can't handle long passwords, so encode differently
195
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
196
 
                       .replace(b"\n", b"\\n")
197
 
                       .replace(b"\0", b"\\x00"))
198
 
        return encoded
199
 
    
200
 
    def encrypt(self, data, password):
201
 
        passphrase = self.password_encode(password)
202
 
        with tempfile.NamedTemporaryFile(
203
 
                dir=self.tempdir) as passfile:
204
 
            passfile.write(passphrase)
205
 
            passfile.flush()
206
 
            proc = subprocess.Popen(['gpg', '--symmetric',
207
 
                                     '--passphrase-file',
208
 
                                     passfile.name]
209
 
                                    + self.gnupgargs,
210
 
                                    stdin = subprocess.PIPE,
211
 
                                    stdout = subprocess.PIPE,
212
 
                                    stderr = subprocess.PIPE)
213
 
            ciphertext, err = proc.communicate(input = data)
214
 
        if proc.returncode != 0:
215
 
            raise PGPError(err)
216
 
        return ciphertext
217
 
    
218
 
    def decrypt(self, data, password):
219
 
        passphrase = self.password_encode(password)
220
 
        with tempfile.NamedTemporaryFile(
221
 
                dir = self.tempdir) as passfile:
222
 
            passfile.write(passphrase)
223
 
            passfile.flush()
224
 
            proc = subprocess.Popen(['gpg', '--decrypt',
225
 
                                     '--passphrase-file',
226
 
                                     passfile.name]
227
 
                                    + self.gnupgargs,
228
 
                                    stdin = subprocess.PIPE,
229
 
                                    stdout = subprocess.PIPE,
230
 
                                    stderr = subprocess.PIPE)
231
 
            decrypted_plaintext, err = proc.communicate(input = data)
232
 
        if proc.returncode != 0:
233
 
            raise PGPError(err)
234
 
        return decrypted_plaintext
235
 
 
236
 
 
237
 
class AvahiError(Exception):
238
 
    def __init__(self, value, *args, **kwargs):
239
 
        self.value = value
240
 
        return super(AvahiError, self).__init__(value, *args,
241
 
                                                **kwargs)
242
 
 
243
 
 
244
 
class AvahiServiceError(AvahiError):
245
 
    pass
246
 
 
247
 
 
248
 
class AvahiGroupError(AvahiError):
249
 
    pass
250
 
 
251
 
 
252
 
class AvahiService(object):
253
 
    """An Avahi (Zeroconf) service.
254
 
    
255
 
    Attributes:
256
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
257
 
               Used to optionally bind to the specified interface.
258
 
    name: string; Example: 'Mandos'
259
 
    type: string; Example: '_mandos._tcp'.
260
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
261
 
    port: integer; what port to announce
262
 
    TXT: list of strings; TXT record for the service
263
 
    domain: string; Domain to publish on, default to .local if empty.
264
 
    host: string; Host to publish records for, default is localhost
265
 
    max_renames: integer; maximum number of renames
266
 
    rename_count: integer; counter so we only rename after collisions
267
 
                  a sensible number of times
268
 
    group: D-Bus Entry Group
269
 
    server: D-Bus Server
270
 
    bus: dbus.SystemBus()
271
 
    """
272
 
    
273
 
    def __init__(self,
274
 
                 interface = avahi.IF_UNSPEC,
275
 
                 name = None,
276
 
                 servicetype = None,
277
 
                 port = None,
278
 
                 TXT = None,
279
 
                 domain = "",
280
 
                 host = "",
281
 
                 max_renames = 32768,
282
 
                 protocol = avahi.PROTO_UNSPEC,
283
 
                 bus = None):
284
 
        self.interface = interface
285
 
        self.name = name
286
 
        self.type = servicetype
287
 
        self.port = port
288
 
        self.TXT = TXT if TXT is not None else []
289
 
        self.domain = domain
290
 
        self.host = host
291
 
        self.rename_count = 0
292
 
        self.max_renames = max_renames
293
 
        self.protocol = protocol
294
 
        self.group = None       # our entry group
295
 
        self.server = None
296
 
        self.bus = bus
297
 
        self.entry_group_state_changed_match = None
298
 
    
299
 
    def rename(self, remove=True):
300
 
        """Derived from the Avahi example code"""
301
 
        if self.rename_count >= self.max_renames:
302
 
            logger.critical("No suitable Zeroconf service name found"
303
 
                            " after %i retries, exiting.",
304
 
                            self.rename_count)
305
 
            raise AvahiServiceError("Too many renames")
306
 
        self.name = str(
307
 
            self.server.GetAlternativeServiceName(self.name))
308
 
        self.rename_count += 1
309
 
        logger.info("Changing Zeroconf service name to %r ...",
310
 
                    self.name)
311
 
        if remove:
312
 
            self.remove()
313
 
        try:
314
 
            self.add()
315
 
        except dbus.exceptions.DBusException as error:
316
 
            if (error.get_dbus_name()
317
 
                == "org.freedesktop.Avahi.CollisionError"):
318
 
                logger.info("Local Zeroconf service name collision.")
319
 
                return self.rename(remove=False)
320
 
            else:
321
 
                logger.critical("D-Bus Exception", exc_info=error)
322
 
                self.cleanup()
323
 
                os._exit(1)
324
 
    
325
 
    def remove(self):
326
 
        """Derived from the Avahi example code"""
327
 
        if self.entry_group_state_changed_match is not None:
328
 
            self.entry_group_state_changed_match.remove()
329
 
            self.entry_group_state_changed_match = None
330
 
        if self.group is not None:
331
 
            self.group.Reset()
332
 
    
333
 
    def add(self):
334
 
        """Derived from the Avahi example code"""
335
 
        self.remove()
336
 
        if self.group is None:
337
 
            self.group = dbus.Interface(
338
 
                self.bus.get_object(avahi.DBUS_NAME,
339
 
                                    self.server.EntryGroupNew()),
340
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
341
 
        self.entry_group_state_changed_match = (
342
 
            self.group.connect_to_signal(
343
 
                'StateChanged', self.entry_group_state_changed))
344
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
345
 
                     self.name, self.type)
346
 
        self.group.AddService(
347
 
            self.interface,
348
 
            self.protocol,
349
 
            dbus.UInt32(0),     # flags
350
 
            self.name, self.type,
351
 
            self.domain, self.host,
352
 
            dbus.UInt16(self.port),
353
 
            avahi.string_array_to_txt_array(self.TXT))
354
 
        self.group.Commit()
355
 
    
356
 
    def entry_group_state_changed(self, state, error):
357
 
        """Derived from the Avahi example code"""
358
 
        logger.debug("Avahi entry group state change: %i", state)
359
 
        
360
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
361
 
            logger.debug("Zeroconf service established.")
362
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
363
 
            logger.info("Zeroconf service name collision.")
364
 
            self.rename()
365
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
366
 
            logger.critical("Avahi: Error in group state changed %s",
367
 
                            str(error))
368
 
            raise AvahiGroupError("State changed: {!s}".format(error))
369
 
    
370
 
    def cleanup(self):
371
 
        """Derived from the Avahi example code"""
372
 
        if self.group is not None:
373
 
            try:
374
 
                self.group.Free()
375
 
            except (dbus.exceptions.UnknownMethodException,
376
 
                    dbus.exceptions.DBusException):
377
 
                pass
378
 
            self.group = None
379
 
        self.remove()
380
 
    
381
 
    def server_state_changed(self, state, error=None):
382
 
        """Derived from the Avahi example code"""
383
 
        logger.debug("Avahi server state change: %i", state)
384
 
        bad_states = {
385
 
            avahi.SERVER_INVALID: "Zeroconf server invalid",
386
 
            avahi.SERVER_REGISTERING: None,
387
 
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
388
 
            avahi.SERVER_FAILURE: "Zeroconf server failure",
389
 
        }
390
 
        if state in bad_states:
391
 
            if bad_states[state] is not None:
392
 
                if error is None:
393
 
                    logger.error(bad_states[state])
394
 
                else:
395
 
                    logger.error(bad_states[state] + ": %r", error)
396
 
            self.cleanup()
397
 
        elif state == avahi.SERVER_RUNNING:
398
 
            self.add()
399
 
        else:
400
 
            if error is None:
401
 
                logger.debug("Unknown state: %r", state)
402
 
            else:
403
 
                logger.debug("Unknown state: %r: %r", state, error)
404
 
    
405
 
    def activate(self):
406
 
        """Derived from the Avahi example code"""
407
 
        if self.server is None:
408
 
            self.server = dbus.Interface(
409
 
                self.bus.get_object(avahi.DBUS_NAME,
410
 
                                    avahi.DBUS_PATH_SERVER,
411
 
                                    follow_name_owner_changes=True),
412
 
                avahi.DBUS_INTERFACE_SERVER)
413
 
        self.server.connect_to_signal("StateChanged",
414
 
                                      self.server_state_changed)
415
 
        self.server_state_changed(self.server.GetState())
416
 
 
417
 
 
418
 
class AvahiServiceToSyslog(AvahiService):
419
 
    def rename(self, *args, **kwargs):
420
 
        """Add the new name to the syslog messages"""
421
 
        ret = AvahiService.rename(self, *args, **kwargs)
422
 
        syslogger.setFormatter(logging.Formatter(
423
 
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
424
 
            .format(self.name)))
425
 
        return ret
 
64
 
 
65
# Brief description of the operation of this program:
 
66
 
67
# This server announces itself as a Zeroconf service.  Connecting
 
68
# clients use the TLS protocol, with the unusual quirk that this
 
69
# server program acts as a TLS "client" while the connecting clients
 
70
# acts as a TLS "server".  The clients (acting as a TLS "server") must
 
71
# supply an OpenPGP certificate, and the fingerprint of this
 
72
# certificate is used by this server to look up (in a list read from a
 
73
# file at start time) which binary blob to give the client.  No other
 
74
# authentication or authorization is done by this server.
 
75
 
 
76
 
 
77
logger = logging.Logger('mandos')
 
78
syslogger = logging.handlers.SysLogHandler\
 
79
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON)
 
80
syslogger.setFormatter(logging.Formatter\
 
81
                        ('%(levelname)s: %(message)s'))
 
82
logger.addHandler(syslogger)
 
83
del syslogger
 
84
 
 
85
# This variable is used to optionally bind to a specified interface.
 
86
# It is a global variable to fit in with the other variables from the
 
87
# Avahi example code.
 
88
serviceInterface = avahi.IF_UNSPEC
 
89
# From the Avahi example code:
 
90
serviceName = None
 
91
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
 
92
servicePort = None                      # Not known at startup
 
93
serviceTXT = []                         # TXT record for the service
 
94
domain = ""                  # Domain to publish on, default to .local
 
95
host = ""          # Host to publish records for, default to localhost
 
96
group = None #our entry group
 
97
rename_count = 12       # Counter so we only rename after collisions a
 
98
                        # sensible number of times
 
99
# End of Avahi example code
426
100
 
427
101
 
428
102
class Client(object):
429
103
    """A representation of a client host served by this server.
430
 
    
431
104
    Attributes:
432
 
    approved:   bool(); 'None' if not yet approved/disapproved
433
 
    approval_delay: datetime.timedelta(); Time to wait for approval
434
 
    approval_duration: datetime.timedelta(); Duration of one approval
435
 
    checker:    subprocess.Popen(); a running checker process used
436
 
                                    to see if the client lives.
437
 
                                    'None' if no process is running.
438
 
    checker_callback_tag: a gobject event source tag, or None
439
 
    checker_command: string; External command which is run to check
440
 
                     if client lives.  %() expansions are done at
 
105
    name:      string; from the config file, used in log messages
 
106
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
107
                 uniquely identify the client
 
108
    secret:    bytestring; sent verbatim (over TLS) to client
 
109
    fqdn:      string (FQDN); available for use by the checker command
 
110
    created:   datetime.datetime()
 
111
    last_seen: datetime.datetime() or None if not yet seen
 
112
    timeout:   datetime.timedelta(); How long from last_seen until
 
113
                                     this client is invalid
 
114
    interval:  datetime.timedelta(); How often to start a new checker
 
115
    stop_hook: If set, called by stop() as stop_hook(self)
 
116
    checker:   subprocess.Popen(); a running checker process used
 
117
                                   to see if the client lives.
 
118
                                   Is None if no process is running.
 
119
    checker_initiator_tag: a gobject event source tag, or None
 
120
    stop_initiator_tag:    - '' -
 
121
    checker_callback_tag:  - '' -
 
122
    checker_command: string; External command which is run to check if
 
123
                     client lives.  %()s expansions are done at
441
124
                     runtime with vars(self) as dict, so that for
442
125
                     instance %(name)s can be used in the command.
443
 
    checker_initiator_tag: a gobject event source tag, or None
444
 
    created:    datetime.datetime(); (UTC) object creation
445
 
    client_structure: Object describing what attributes a client has
446
 
                      and is used for storing the client at exit
447
 
    current_checker_command: string; current running checker_command
448
 
    disable_initiator_tag: a gobject event source tag, or None
449
 
    enabled:    bool()
450
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
451
 
                 uniquely identify the client
452
 
    host:       string; available for use by the checker command
453
 
    interval:   datetime.timedelta(); How often to start a new checker
454
 
    last_approval_request: datetime.datetime(); (UTC) or None
455
 
    last_checked_ok: datetime.datetime(); (UTC) or None
456
 
    last_checker_status: integer between 0 and 255 reflecting exit
457
 
                         status of last checker. -1 reflects crashed
458
 
                         checker, -2 means no checker completed yet.
459
 
    last_enabled: datetime.datetime(); (UTC) or None
460
 
    name:       string; from the config file, used in log messages and
461
 
                        D-Bus identifiers
462
 
    secret:     bytestring; sent verbatim (over TLS) to client
463
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
464
 
                                      until this client is disabled
465
 
    extended_timeout:   extra long timeout when secret has been sent
466
 
    runtime_expansions: Allowed attributes for runtime expansion.
467
 
    expires:    datetime.datetime(); time (UTC) when a client will be
468
 
                disabled, or None
469
 
    server_settings: The server_settings dict from main()
 
126
    Private attibutes:
 
127
    _timeout: Real variable for 'timeout'
 
128
    _interval: Real variable for 'interval'
 
129
    _timeout_milliseconds: Used by gobject.timeout_add()
 
130
    _interval_milliseconds: - '' -
470
131
    """
471
 
    
472
 
    runtime_expansions = ("approval_delay", "approval_duration",
473
 
                          "created", "enabled", "expires",
474
 
                          "fingerprint", "host", "interval",
475
 
                          "last_approval_request", "last_checked_ok",
476
 
                          "last_enabled", "name", "timeout")
477
 
    client_defaults = {
478
 
        "timeout": "PT5M",
479
 
        "extended_timeout": "PT15M",
480
 
        "interval": "PT2M",
481
 
        "checker": "fping -q -- %%(host)s",
482
 
        "host": "",
483
 
        "approval_delay": "PT0S",
484
 
        "approval_duration": "PT1S",
485
 
        "approved_by_default": "True",
486
 
        "enabled": "True",
487
 
    }
488
 
    
489
 
    @staticmethod
490
 
    def config_parser(config):
491
 
        """Construct a new dict of client settings of this form:
492
 
        { client_name: {setting_name: value, ...}, ...}
493
 
        with exceptions for any special settings as defined above.
494
 
        NOTE: Must be a pure function. Must return the same result
495
 
        value given the same arguments.
496
 
        """
497
 
        settings = {}
498
 
        for client_name in config.sections():
499
 
            section = dict(config.items(client_name))
500
 
            client = settings[client_name] = {}
501
 
            
502
 
            client["host"] = section["host"]
503
 
            # Reformat values from string types to Python types
504
 
            client["approved_by_default"] = config.getboolean(
505
 
                client_name, "approved_by_default")
506
 
            client["enabled"] = config.getboolean(client_name,
507
 
                                                  "enabled")
508
 
            
509
 
            # Uppercase and remove spaces from fingerprint for later
510
 
            # comparison purposes with return value from the
511
 
            # fingerprint() function
512
 
            client["fingerprint"] = (section["fingerprint"].upper()
513
 
                                     .replace(" ", ""))
514
 
            if "secret" in section:
515
 
                client["secret"] = section["secret"].decode("base64")
516
 
            elif "secfile" in section:
517
 
                with open(os.path.expanduser(os.path.expandvars
518
 
                                             (section["secfile"])),
519
 
                          "rb") as secfile:
520
 
                    client["secret"] = secfile.read()
521
 
            else:
522
 
                raise TypeError("No secret or secfile for section {}"
523
 
                                .format(section))
524
 
            client["timeout"] = string_to_delta(section["timeout"])
525
 
            client["extended_timeout"] = string_to_delta(
526
 
                section["extended_timeout"])
527
 
            client["interval"] = string_to_delta(section["interval"])
528
 
            client["approval_delay"] = string_to_delta(
529
 
                section["approval_delay"])
530
 
            client["approval_duration"] = string_to_delta(
531
 
                section["approval_duration"])
532
 
            client["checker_command"] = section["checker"]
533
 
            client["last_approval_request"] = None
534
 
            client["last_checked_ok"] = None
535
 
            client["last_checker_status"] = -2
536
 
        
537
 
        return settings
538
 
    
539
 
    def __init__(self, settings, name = None, server_settings=None):
 
132
    def _set_timeout(self, timeout):
 
133
        "Setter function for 'timeout' attribute"
 
134
        self._timeout = timeout
 
135
        self._timeout_milliseconds = ((self.timeout.days
 
136
                                       * 24 * 60 * 60 * 1000)
 
137
                                      + (self.timeout.seconds * 1000)
 
138
                                      + (self.timeout.microseconds
 
139
                                         // 1000))
 
140
    timeout = property(lambda self: self._timeout,
 
141
                       _set_timeout)
 
142
    del _set_timeout
 
143
    def _set_interval(self, interval):
 
144
        "Setter function for 'interval' attribute"
 
145
        self._interval = interval
 
146
        self._interval_milliseconds = ((self.interval.days
 
147
                                        * 24 * 60 * 60 * 1000)
 
148
                                       + (self.interval.seconds
 
149
                                          * 1000)
 
150
                                       + (self.interval.microseconds
 
151
                                          // 1000))
 
152
    interval = property(lambda self: self._interval,
 
153
                        _set_interval)
 
154
    del _set_interval
 
155
    def __init__(self, name=None, stop_hook=None, fingerprint=None,
 
156
                 secret=None, secfile=None, fqdn=None, timeout=None,
 
157
                 interval=-1, checker=None):
 
158
        """Note: the 'checker' argument sets the 'checker_command'
 
159
        attribute and not the 'checker' attribute.."""
540
160
        self.name = name
541
 
        if server_settings is None:
542
 
            server_settings = {}
543
 
        self.server_settings = server_settings
544
 
        # adding all client settings
545
 
        for setting, value in settings.items():
546
 
            setattr(self, setting, value)
547
 
        
548
 
        if self.enabled:
549
 
            if not hasattr(self, "last_enabled"):
550
 
                self.last_enabled = datetime.datetime.utcnow()
551
 
            if not hasattr(self, "expires"):
552
 
                self.expires = (datetime.datetime.utcnow()
553
 
                                + self.timeout)
 
161
        logger.debug(u"Creating client %r", self.name)
 
162
        # Uppercase and remove spaces from fingerprint
 
163
        # for later comparison purposes with return value of
 
164
        # the fingerprint() function
 
165
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
 
166
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
 
167
        if secret:
 
168
            self.secret = secret.decode(u"base64")
 
169
        elif secfile:
 
170
            sf = open(secfile)
 
171
            self.secret = sf.read()
 
172
            sf.close()
554
173
        else:
555
 
            self.last_enabled = None
556
 
            self.expires = None
557
 
        
558
 
        logger.debug("Creating client %r", self.name)
559
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
560
 
        self.created = settings.get("created",
561
 
                                    datetime.datetime.utcnow())
562
 
        
563
 
        # attributes specific for this server instance
 
174
            raise RuntimeError(u"No secret or secfile for client %s"
 
175
                               % self.name)
 
176
        self.fqdn = fqdn                # string
 
177
        self.created = datetime.datetime.now()
 
178
        self.last_seen = None
 
179
        self.timeout = string_to_delta(timeout)
 
180
        self.interval = string_to_delta(interval)
 
181
        self.stop_hook = stop_hook
564
182
        self.checker = None
565
183
        self.checker_initiator_tag = None
566
 
        self.disable_initiator_tag = None
 
184
        self.stop_initiator_tag = None
567
185
        self.checker_callback_tag = None
568
 
        self.current_checker_command = None
569
 
        self.approved = None
570
 
        self.approvals_pending = 0
571
 
        self.changedstate = multiprocessing_manager.Condition(
572
 
            multiprocessing_manager.Lock())
573
 
        self.client_structure = [attr
574
 
                                 for attr in self.__dict__.iterkeys()
575
 
                                 if not attr.startswith("_")]
576
 
        self.client_structure.append("client_structure")
577
 
        
578
 
        for name, t in inspect.getmembers(
579
 
                type(self), lambda obj: isinstance(obj, property)):
580
 
            if not name.startswith("_"):
581
 
                self.client_structure.append(name)
582
 
    
583
 
    # Send notice to process children that client state has changed
584
 
    def send_changedstate(self):
585
 
        with self.changedstate:
586
 
            self.changedstate.notify_all()
587
 
    
588
 
    def enable(self):
 
186
        self.check_command = checker
 
187
    def start(self):
589
188
        """Start this client's checker and timeout hooks"""
590
 
        if getattr(self, "enabled", False):
591
 
            # Already enabled
592
 
            return
593
 
        self.expires = datetime.datetime.utcnow() + self.timeout
594
 
        self.enabled = True
595
 
        self.last_enabled = datetime.datetime.utcnow()
596
 
        self.init_checker()
597
 
        self.send_changedstate()
598
 
    
599
 
    def disable(self, quiet=True):
600
 
        """Disable this client."""
601
 
        if not getattr(self, "enabled", False):
602
 
            return False
603
 
        if not quiet:
604
 
            logger.info("Disabling client %s", self.name)
605
 
        if getattr(self, "disable_initiator_tag", None) is not None:
606
 
            gobject.source_remove(self.disable_initiator_tag)
607
 
            self.disable_initiator_tag = None
608
 
        self.expires = None
609
 
        if getattr(self, "checker_initiator_tag", None) is not None:
610
 
            gobject.source_remove(self.checker_initiator_tag)
611
 
            self.checker_initiator_tag = None
612
 
        self.stop_checker()
613
 
        self.enabled = False
614
 
        if not quiet:
615
 
            self.send_changedstate()
616
 
        # Do not run this again if called by a gobject.timeout_add
617
 
        return False
618
 
    
619
 
    def __del__(self):
620
 
        self.disable()
621
 
    
622
 
    def init_checker(self):
623
189
        # Schedule a new checker to be started an 'interval' from now,
624
190
        # and every interval from then on.
625
 
        if self.checker_initiator_tag is not None:
626
 
            gobject.source_remove(self.checker_initiator_tag)
627
 
        self.checker_initiator_tag = gobject.timeout_add(
628
 
            int(self.interval.total_seconds() * 1000),
629
 
            self.start_checker)
630
 
        # Schedule a disable() when 'timeout' has passed
631
 
        if self.disable_initiator_tag is not None:
632
 
            gobject.source_remove(self.disable_initiator_tag)
633
 
        self.disable_initiator_tag = gobject.timeout_add(
634
 
            int(self.timeout.total_seconds() * 1000), self.disable)
 
191
        self.checker_initiator_tag = gobject.timeout_add\
 
192
                                     (self._interval_milliseconds,
 
193
                                      self.start_checker)
635
194
        # Also start a new checker *right now*.
636
195
        self.start_checker()
637
 
    
638
 
    def checker_callback(self, pid, condition, command):
 
196
        # Schedule a stop() when 'timeout' has passed
 
197
        self.stop_initiator_tag = gobject.timeout_add\
 
198
                                  (self._timeout_milliseconds,
 
199
                                   self.stop)
 
200
    def stop(self):
 
201
        """Stop this client.
 
202
        The possibility that this client might be restarted is left
 
203
        open, but not currently used."""
 
204
        # If this client doesn't have a secret, it is already stopped.
 
205
        if self.secret:
 
206
            logger.debug(u"Stopping client %s", self.name)
 
207
            self.secret = None
 
208
        else:
 
209
            return False
 
210
        if hasattr(self, "stop_initiator_tag") \
 
211
               and self.stop_initiator_tag:
 
212
            gobject.source_remove(self.stop_initiator_tag)
 
213
            self.stop_initiator_tag = None
 
214
        if hasattr(self, "checker_initiator_tag") \
 
215
               and self.checker_initiator_tag:
 
216
            gobject.source_remove(self.checker_initiator_tag)
 
217
            self.checker_initiator_tag = None
 
218
        self.stop_checker()
 
219
        if self.stop_hook:
 
220
            self.stop_hook(self)
 
221
        # Do not run this again if called by a gobject.timeout_add
 
222
        return False
 
223
    def __del__(self):
 
224
        self.stop_hook = None
 
225
        self.stop()
 
226
    def checker_callback(self, pid, condition):
639
227
        """The checker has completed, so take appropriate actions."""
 
228
        now = datetime.datetime.now()
640
229
        self.checker_callback_tag = None
641
230
        self.checker = None
642
 
        if os.WIFEXITED(condition):
643
 
            self.last_checker_status = os.WEXITSTATUS(condition)
644
 
            if self.last_checker_status == 0:
645
 
                logger.info("Checker for %(name)s succeeded",
646
 
                            vars(self))
647
 
                self.checked_ok()
648
 
            else:
649
 
                logger.info("Checker for %(name)s failed", vars(self))
650
 
        else:
651
 
            self.last_checker_status = -1
652
 
            logger.warning("Checker for %(name)s crashed?",
 
231
        if os.WIFEXITED(condition) \
 
232
               and (os.WEXITSTATUS(condition) == 0):
 
233
            logger.debug(u"Checker for %(name)s succeeded",
 
234
                         vars(self))
 
235
            self.last_seen = now
 
236
            gobject.source_remove(self.stop_initiator_tag)
 
237
            self.stop_initiator_tag = gobject.timeout_add\
 
238
                                      (self._timeout_milliseconds,
 
239
                                       self.stop)
 
240
        elif not os.WIFEXITED(condition):
 
241
            logger.warning(u"Checker for %(name)s crashed?",
653
242
                           vars(self))
654
 
    
655
 
    def checked_ok(self):
656
 
        """Assert that the client has been seen, alive and well."""
657
 
        self.last_checked_ok = datetime.datetime.utcnow()
658
 
        self.last_checker_status = 0
659
 
        self.bump_timeout()
660
 
    
661
 
    def bump_timeout(self, timeout=None):
662
 
        """Bump up the timeout for this client."""
663
 
        if timeout is None:
664
 
            timeout = self.timeout
665
 
        if self.disable_initiator_tag is not None:
666
 
            gobject.source_remove(self.disable_initiator_tag)
667
 
            self.disable_initiator_tag = None
668
 
        if getattr(self, "enabled", False):
669
 
            self.disable_initiator_tag = gobject.timeout_add(
670
 
                int(timeout.total_seconds() * 1000), self.disable)
671
 
            self.expires = datetime.datetime.utcnow() + timeout
672
 
    
673
 
    def need_approval(self):
674
 
        self.last_approval_request = datetime.datetime.utcnow()
675
 
    
 
243
        else:
 
244
            logger.debug(u"Checker for %(name)s failed",
 
245
                         vars(self))
676
246
    def start_checker(self):
677
247
        """Start a new checker subprocess if one is not running.
678
 
        
679
248
        If a checker already exists, leave it running and do
680
249
        nothing."""
681
250
        # The reason for not killing a running checker is that if we
682
 
        # did that, and if a checker (for some reason) started running
683
 
        # slowly and taking more than 'interval' time, then the client
684
 
        # would inevitably timeout, since no checker would get a
685
 
        # chance to run to completion.  If we instead leave running
 
251
        # did that, then if a checker (for some reason) started
 
252
        # running slowly and taking more than 'interval' time, the
 
253
        # client would inevitably timeout, since no checker would get
 
254
        # a chance to run to completion.  If we instead leave running
686
255
        # checkers alone, the checker would have to take more time
687
 
        # than 'timeout' for the client to be disabled, which is as it
688
 
        # should be.
689
 
        
690
 
        # If a checker exists, make sure it is not a zombie
691
 
        try:
692
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
 
        except AttributeError:
694
 
            pass
695
 
        except OSError as error:
696
 
            if error.errno != errno.ECHILD:
697
 
                raise
698
 
        else:
699
 
            if pid:
700
 
                logger.warning("Checker was a zombie")
701
 
                gobject.source_remove(self.checker_callback_tag)
702
 
                self.checker_callback(pid, status,
703
 
                                      self.current_checker_command)
704
 
        # Start a new checker if needed
 
256
        # than 'timeout' for the client to be declared invalid, which
 
257
        # is as it should be.
705
258
        if self.checker is None:
706
 
            # Escape attributes for the shell
707
 
            escaped_attrs = {
708
 
                attr: re.escape(str(getattr(self, attr)))
709
 
                for attr in self.runtime_expansions }
710
 
            try:
711
 
                command = self.checker_command % escaped_attrs
712
 
            except TypeError as error:
713
 
                logger.error('Could not format string "%s"',
714
 
                             self.checker_command,
715
 
                             exc_info=error)
716
 
                return True     # Try again later
717
 
            self.current_checker_command = command
718
 
            try:
719
 
                logger.info("Starting checker %r for %s", command,
720
 
                            self.name)
721
 
                # We don't need to redirect stdout and stderr, since
722
 
                # in normal mode, that is already done by daemon(),
723
 
                # and in debug mode we don't want to.  (Stdin is
724
 
                # always replaced by /dev/null.)
725
 
                # The exception is when not debugging but nevertheless
726
 
                # running in the foreground; use the previously
727
 
                # created wnull.
728
 
                popen_args = {}
729
 
                if (not self.server_settings["debug"]
730
 
                    and self.server_settings["foreground"]):
731
 
                    popen_args.update({"stdout": wnull,
732
 
                                       "stderr": wnull })
733
 
                self.checker = subprocess.Popen(command,
734
 
                                                close_fds=True,
735
 
                                                shell=True,
736
 
                                                cwd="/",
737
 
                                                **popen_args)
738
 
            except OSError as error:
739
 
                logger.error("Failed to start subprocess",
740
 
                             exc_info=error)
741
 
                return True
742
 
            self.checker_callback_tag = gobject.child_watch_add(
743
 
                self.checker.pid, self.checker_callback, data=command)
744
 
            # The checker may have completed before the gobject
745
 
            # watch was added.  Check for this.
746
 
            try:
747
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
748
 
            except OSError as error:
749
 
                if error.errno == errno.ECHILD:
750
 
                    # This should never happen
751
 
                    logger.error("Child process vanished",
752
 
                                 exc_info=error)
753
 
                    return True
754
 
                raise
755
 
            if pid:
756
 
                gobject.source_remove(self.checker_callback_tag)
757
 
                self.checker_callback(pid, status, command)
 
259
            try:
 
260
                command = self.check_command % self.fqdn
 
261
            except TypeError:
 
262
                escaped_attrs = dict((key, re.escape(str(val)))
 
263
                                     for key, val in
 
264
                                     vars(self).iteritems())
 
265
                try:
 
266
                    command = self.check_command % escaped_attrs
 
267
                except TypeError, error:
 
268
                    logger.critical(u'Could not format string "%s":'
 
269
                                    u' %s', self.check_command, error)
 
270
                    return True # Try again later
 
271
            try:
 
272
                logger.debug(u"Starting checker %r for %s",
 
273
                             command, self.name)
 
274
                self.checker = subprocess.\
 
275
                               Popen(command,
 
276
                                     close_fds=True, shell=True,
 
277
                                     cwd="/")
 
278
                self.checker_callback_tag = gobject.child_watch_add\
 
279
                                            (self.checker.pid,
 
280
                                             self.checker_callback)
 
281
            except subprocess.OSError, error:
 
282
                logger.error(u"Failed to start subprocess: %s",
 
283
                             error)
758
284
        # Re-run this periodically if run by gobject.timeout_add
759
285
        return True
760
 
    
761
286
    def stop_checker(self):
762
287
        """Force the checker process, if any, to stop."""
763
288
        if self.checker_callback_tag:
764
289
            gobject.source_remove(self.checker_callback_tag)
765
290
            self.checker_callback_tag = None
766
 
        if getattr(self, "checker", None) is None:
 
291
        if not hasattr(self, "checker") or self.checker is None:
767
292
            return
768
293
        logger.debug("Stopping checker for %(name)s", vars(self))
769
294
        try:
770
 
            self.checker.terminate()
771
 
            #time.sleep(0.5)
 
295
            os.kill(self.checker.pid, signal.SIGTERM)
 
296
            #os.sleep(0.5)
772
297
            #if self.checker.poll() is None:
773
 
            #    self.checker.kill()
774
 
        except OSError as error:
775
 
            if error.errno != errno.ESRCH: # No such process
 
298
            #    os.kill(self.checker.pid, signal.SIGKILL)
 
299
        except OSError, error:
 
300
            if error.errno != errno.ESRCH:
776
301
                raise
777
302
        self.checker = None
778
 
 
779
 
 
780
 
def dbus_service_property(dbus_interface,
781
 
                          signature="v",
782
 
                          access="readwrite",
783
 
                          byte_arrays=False):
784
 
    """Decorators for marking methods of a DBusObjectWithProperties to
785
 
    become properties on the D-Bus.
786
 
    
787
 
    The decorated method will be called with no arguments by "Get"
788
 
    and with one argument by "Set".
789
 
    
790
 
    The parameters, where they are supported, are the same as
791
 
    dbus.service.method, except there is only "signature", since the
792
 
    type from Get() and the type sent to Set() is the same.
793
 
    """
794
 
    # Encoding deeply encoded byte arrays is not supported yet by the
795
 
    # "Set" method, so we fail early here:
796
 
    if byte_arrays and signature != "ay":
797
 
        raise ValueError("Byte arrays not supported for non-'ay'"
798
 
                         " signature {!r}".format(signature))
799
 
    
800
 
    def decorator(func):
801
 
        func._dbus_is_property = True
802
 
        func._dbus_interface = dbus_interface
803
 
        func._dbus_signature = signature
804
 
        func._dbus_access = access
805
 
        func._dbus_name = func.__name__
806
 
        if func._dbus_name.endswith("_dbus_property"):
807
 
            func._dbus_name = func._dbus_name[:-14]
808
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
809
 
        return func
810
 
    
811
 
    return decorator
812
 
 
813
 
 
814
 
def dbus_interface_annotations(dbus_interface):
815
 
    """Decorator for marking functions returning interface annotations
816
 
    
817
 
    Usage:
818
 
    
819
 
    @dbus_interface_annotations("org.example.Interface")
820
 
    def _foo(self):  # Function name does not matter
821
 
        return {"org.freedesktop.DBus.Deprecated": "true",
822
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
823
 
                    "false"}
824
 
    """
825
 
    
826
 
    def decorator(func):
827
 
        func._dbus_is_interface = True
828
 
        func._dbus_interface = dbus_interface
829
 
        func._dbus_name = dbus_interface
830
 
        return func
831
 
    
832
 
    return decorator
833
 
 
834
 
 
835
 
def dbus_annotations(annotations):
836
 
    """Decorator to annotate D-Bus methods, signals or properties
837
 
    Usage:
838
 
    
839
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
840
 
                       "org.freedesktop.DBus.Property."
841
 
                       "EmitsChangedSignal": "false"})
842
 
    @dbus_service_property("org.example.Interface", signature="b",
843
 
                           access="r")
844
 
    def Property_dbus_property(self):
845
 
        return dbus.Boolean(False)
846
 
    """
847
 
    
848
 
    def decorator(func):
849
 
        func._dbus_annotations = annotations
850
 
        return func
851
 
    
852
 
    return decorator
853
 
 
854
 
 
855
 
class DBusPropertyException(dbus.exceptions.DBusException):
856
 
    """A base class for D-Bus property-related exceptions
857
 
    """
858
 
    pass
859
 
 
860
 
 
861
 
class DBusPropertyAccessException(DBusPropertyException):
862
 
    """A property's access permissions disallows an operation.
863
 
    """
864
 
    pass
865
 
 
866
 
 
867
 
class DBusPropertyNotFound(DBusPropertyException):
868
 
    """An attempt was made to access a non-existing property.
869
 
    """
870
 
    pass
871
 
 
872
 
 
873
 
class DBusObjectWithProperties(dbus.service.Object):
874
 
    """A D-Bus object with properties.
875
 
    
876
 
    Classes inheriting from this can use the dbus_service_property
877
 
    decorator to expose methods as D-Bus properties.  It exposes the
878
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
879
 
    """
880
 
    
881
 
    @staticmethod
882
 
    def _is_dbus_thing(thing):
883
 
        """Returns a function testing if an attribute is a D-Bus thing
884
 
        
885
 
        If called like _is_dbus_thing("method") it returns a function
886
 
        suitable for use as predicate to inspect.getmembers().
887
 
        """
888
 
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
889
 
                                   False)
890
 
    
891
 
    def _get_all_dbus_things(self, thing):
892
 
        """Returns a generator of (name, attribute) pairs
893
 
        """
894
 
        return ((getattr(athing.__get__(self), "_dbus_name", name),
895
 
                 athing.__get__(self))
896
 
                for cls in self.__class__.__mro__
897
 
                for name, athing in
898
 
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
899
 
    
900
 
    def _get_dbus_property(self, interface_name, property_name):
901
 
        """Returns a bound method if one exists which is a D-Bus
902
 
        property with the specified name and interface.
903
 
        """
904
 
        for cls in self.__class__.__mro__:
905
 
            for name, value in inspect.getmembers(
906
 
                    cls, self._is_dbus_thing("property")):
907
 
                if (value._dbus_name == property_name
908
 
                    and value._dbus_interface == interface_name):
909
 
                    return value.__get__(self)
910
 
        
911
 
        # No such property
912
 
        raise DBusPropertyNotFound("{}:{}.{}".format(
913
 
            self.dbus_object_path, interface_name, property_name))
914
 
    
915
 
    @dbus.service.method(dbus.PROPERTIES_IFACE,
916
 
                         in_signature="ss",
917
 
                         out_signature="v")
918
 
    def Get(self, interface_name, property_name):
919
 
        """Standard D-Bus property Get() method, see D-Bus standard.
920
 
        """
921
 
        prop = self._get_dbus_property(interface_name, property_name)
922
 
        if prop._dbus_access == "write":
923
 
            raise DBusPropertyAccessException(property_name)
924
 
        value = prop()
925
 
        if not hasattr(value, "variant_level"):
926
 
            return value
927
 
        return type(value)(value, variant_level=value.variant_level+1)
928
 
    
929
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
930
 
    def Set(self, interface_name, property_name, value):
931
 
        """Standard D-Bus property Set() method, see D-Bus standard.
932
 
        """
933
 
        prop = self._get_dbus_property(interface_name, property_name)
934
 
        if prop._dbus_access == "read":
935
 
            raise DBusPropertyAccessException(property_name)
936
 
        if prop._dbus_get_args_options["byte_arrays"]:
937
 
            # The byte_arrays option is not supported yet on
938
 
            # signatures other than "ay".
939
 
            if prop._dbus_signature != "ay":
940
 
                raise ValueError("Byte arrays not supported for non-"
941
 
                                 "'ay' signature {!r}"
942
 
                                 .format(prop._dbus_signature))
943
 
            value = dbus.ByteArray(b''.join(chr(byte)
944
 
                                            for byte in value))
945
 
        prop(value)
946
 
    
947
 
    @dbus.service.method(dbus.PROPERTIES_IFACE,
948
 
                         in_signature="s",
949
 
                         out_signature="a{sv}")
950
 
    def GetAll(self, interface_name):
951
 
        """Standard D-Bus property GetAll() method, see D-Bus
952
 
        standard.
953
 
        
954
 
        Note: Will not include properties with access="write".
955
 
        """
956
 
        properties = {}
957
 
        for name, prop in self._get_all_dbus_things("property"):
958
 
            if (interface_name
959
 
                and interface_name != prop._dbus_interface):
960
 
                # Interface non-empty but did not match
961
 
                continue
962
 
            # Ignore write-only properties
963
 
            if prop._dbus_access == "write":
964
 
                continue
965
 
            value = prop()
966
 
            if not hasattr(value, "variant_level"):
967
 
                properties[name] = value
968
 
                continue
969
 
            properties[name] = type(value)(
970
 
                value, variant_level = value.variant_level + 1)
971
 
        return dbus.Dictionary(properties, signature="sv")
972
 
    
973
 
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
974
 
    def PropertiesChanged(self, interface_name, changed_properties,
975
 
                          invalidated_properties):
976
 
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
977
 
        standard.
978
 
        """
979
 
        pass
980
 
    
981
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
982
 
                         out_signature="s",
983
 
                         path_keyword='object_path',
984
 
                         connection_keyword='connection')
985
 
    def Introspect(self, object_path, connection):
986
 
        """Overloading of standard D-Bus method.
987
 
        
988
 
        Inserts property tags and interface annotation tags.
989
 
        """
990
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
991
 
                                                   connection)
992
 
        try:
993
 
            document = xml.dom.minidom.parseString(xmlstring)
994
 
            
995
 
            def make_tag(document, name, prop):
996
 
                e = document.createElement("property")
997
 
                e.setAttribute("name", name)
998
 
                e.setAttribute("type", prop._dbus_signature)
999
 
                e.setAttribute("access", prop._dbus_access)
1000
 
                return e
1001
 
            
1002
 
            for if_tag in document.getElementsByTagName("interface"):
1003
 
                # Add property tags
1004
 
                for tag in (make_tag(document, name, prop)
1005
 
                            for name, prop
1006
 
                            in self._get_all_dbus_things("property")
1007
 
                            if prop._dbus_interface
1008
 
                            == if_tag.getAttribute("name")):
1009
 
                    if_tag.appendChild(tag)
1010
 
                # Add annotation tags
1011
 
                for typ in ("method", "signal", "property"):
1012
 
                    for tag in if_tag.getElementsByTagName(typ):
1013
 
                        annots = dict()
1014
 
                        for name, prop in (self.
1015
 
                                           _get_all_dbus_things(typ)):
1016
 
                            if (name == tag.getAttribute("name")
1017
 
                                and prop._dbus_interface
1018
 
                                == if_tag.getAttribute("name")):
1019
 
                                annots.update(getattr(
1020
 
                                    prop, "_dbus_annotations", {}))
1021
 
                        for name, value in annots.items():
1022
 
                            ann_tag = document.createElement(
1023
 
                                "annotation")
1024
 
                            ann_tag.setAttribute("name", name)
1025
 
                            ann_tag.setAttribute("value", value)
1026
 
                            tag.appendChild(ann_tag)
1027
 
                # Add interface annotation tags
1028
 
                for annotation, value in dict(
1029
 
                    itertools.chain.from_iterable(
1030
 
                        annotations().items()
1031
 
                        for name, annotations
1032
 
                        in self._get_all_dbus_things("interface")
1033
 
                        if name == if_tag.getAttribute("name")
1034
 
                        )).items():
1035
 
                    ann_tag = document.createElement("annotation")
1036
 
                    ann_tag.setAttribute("name", annotation)
1037
 
                    ann_tag.setAttribute("value", value)
1038
 
                    if_tag.appendChild(ann_tag)
1039
 
                # Add the names to the return values for the
1040
 
                # "org.freedesktop.DBus.Properties" methods
1041
 
                if (if_tag.getAttribute("name")
1042
 
                    == "org.freedesktop.DBus.Properties"):
1043
 
                    for cn in if_tag.getElementsByTagName("method"):
1044
 
                        if cn.getAttribute("name") == "Get":
1045
 
                            for arg in cn.getElementsByTagName("arg"):
1046
 
                                if (arg.getAttribute("direction")
1047
 
                                    == "out"):
1048
 
                                    arg.setAttribute("name", "value")
1049
 
                        elif cn.getAttribute("name") == "GetAll":
1050
 
                            for arg in cn.getElementsByTagName("arg"):
1051
 
                                if (arg.getAttribute("direction")
1052
 
                                    == "out"):
1053
 
                                    arg.setAttribute("name", "props")
1054
 
            xmlstring = document.toxml("utf-8")
1055
 
            document.unlink()
1056
 
        except (AttributeError, xml.dom.DOMException,
1057
 
                xml.parsers.expat.ExpatError) as error:
1058
 
            logger.error("Failed to override Introspection method",
1059
 
                         exc_info=error)
1060
 
        return xmlstring
1061
 
 
1062
 
 
1063
 
def datetime_to_dbus(dt, variant_level=0):
1064
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1065
 
    if dt is None:
1066
 
        return dbus.String("", variant_level = variant_level)
1067
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
1068
 
 
1069
 
 
1070
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1071
 
    """A class decorator; applied to a subclass of
1072
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1073
 
    interface names according to the "alt_interface_names" mapping.
1074
 
    Usage:
1075
 
    
1076
 
    @alternate_dbus_interfaces({"org.example.Interface":
1077
 
                                    "net.example.AlternateInterface"})
1078
 
    class SampleDBusObject(dbus.service.Object):
1079
 
        @dbus.service.method("org.example.Interface")
1080
 
        def SampleDBusMethod():
1081
 
            pass
1082
 
    
1083
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1084
 
    reachable via two interfaces: "org.example.Interface" and
1085
 
    "net.example.AlternateInterface", the latter of which will have
1086
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1087
 
    "true", unless "deprecate" is passed with a False value.
1088
 
    
1089
 
    This works for methods and signals, and also for D-Bus properties
1090
 
    (from DBusObjectWithProperties) and interfaces (from the
1091
 
    dbus_interface_annotations decorator).
1092
 
    """
1093
 
    
1094
 
    def wrapper(cls):
1095
 
        for orig_interface_name, alt_interface_name in (
1096
 
                alt_interface_names.items()):
1097
 
            attr = {}
1098
 
            interface_names = set()
1099
 
            # Go though all attributes of the class
1100
 
            for attrname, attribute in inspect.getmembers(cls):
1101
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1102
 
                # with the wrong interface name
1103
 
                if (not hasattr(attribute, "_dbus_interface")
1104
 
                    or not attribute._dbus_interface.startswith(
1105
 
                        orig_interface_name)):
1106
 
                    continue
1107
 
                # Create an alternate D-Bus interface name based on
1108
 
                # the current name
1109
 
                alt_interface = attribute._dbus_interface.replace(
1110
 
                    orig_interface_name, alt_interface_name)
1111
 
                interface_names.add(alt_interface)
1112
 
                # Is this a D-Bus signal?
1113
 
                if getattr(attribute, "_dbus_is_signal", False):
1114
 
                    # Extract the original non-method undecorated
1115
 
                    # function by black magic
1116
 
                    nonmethod_func = (dict(
1117
 
                        zip(attribute.func_code.co_freevars,
1118
 
                            attribute.__closure__))
1119
 
                                      ["func"].cell_contents)
1120
 
                    # Create a new, but exactly alike, function
1121
 
                    # object, and decorate it to be a new D-Bus signal
1122
 
                    # with the alternate D-Bus interface name
1123
 
                    new_function = (dbus.service.signal(
1124
 
                        alt_interface, attribute._dbus_signature)
1125
 
                                    (types.FunctionType(
1126
 
                                        nonmethod_func.func_code,
1127
 
                                        nonmethod_func.func_globals,
1128
 
                                        nonmethod_func.func_name,
1129
 
                                        nonmethod_func.func_defaults,
1130
 
                                        nonmethod_func.func_closure)))
1131
 
                    # Copy annotations, if any
1132
 
                    try:
1133
 
                        new_function._dbus_annotations = dict(
1134
 
                            attribute._dbus_annotations)
1135
 
                    except AttributeError:
1136
 
                        pass
1137
 
                    # Define a creator of a function to call both the
1138
 
                    # original and alternate functions, so both the
1139
 
                    # original and alternate signals gets sent when
1140
 
                    # the function is called
1141
 
                    def fixscope(func1, func2):
1142
 
                        """This function is a scope container to pass
1143
 
                        func1 and func2 to the "call_both" function
1144
 
                        outside of its arguments"""
1145
 
                        
1146
 
                        def call_both(*args, **kwargs):
1147
 
                            """This function will emit two D-Bus
1148
 
                            signals by calling func1 and func2"""
1149
 
                            func1(*args, **kwargs)
1150
 
                            func2(*args, **kwargs)
1151
 
                        
1152
 
                        return call_both
1153
 
                    # Create the "call_both" function and add it to
1154
 
                    # the class
1155
 
                    attr[attrname] = fixscope(attribute, new_function)
1156
 
                # Is this a D-Bus method?
1157
 
                elif getattr(attribute, "_dbus_is_method", False):
1158
 
                    # Create a new, but exactly alike, function
1159
 
                    # object.  Decorate it to be a new D-Bus method
1160
 
                    # with the alternate D-Bus interface name.  Add it
1161
 
                    # to the class.
1162
 
                    attr[attrname] = (
1163
 
                        dbus.service.method(
1164
 
                            alt_interface,
1165
 
                            attribute._dbus_in_signature,
1166
 
                            attribute._dbus_out_signature)
1167
 
                        (types.FunctionType(attribute.func_code,
1168
 
                                            attribute.func_globals,
1169
 
                                            attribute.func_name,
1170
 
                                            attribute.func_defaults,
1171
 
                                            attribute.func_closure)))
1172
 
                    # Copy annotations, if any
1173
 
                    try:
1174
 
                        attr[attrname]._dbus_annotations = dict(
1175
 
                            attribute._dbus_annotations)
1176
 
                    except AttributeError:
1177
 
                        pass
1178
 
                # Is this a D-Bus property?
1179
 
                elif getattr(attribute, "_dbus_is_property", False):
1180
 
                    # Create a new, but exactly alike, function
1181
 
                    # object, and decorate it to be a new D-Bus
1182
 
                    # property with the alternate D-Bus interface
1183
 
                    # name.  Add it to the class.
1184
 
                    attr[attrname] = (dbus_service_property(
1185
 
                        alt_interface, attribute._dbus_signature,
1186
 
                        attribute._dbus_access,
1187
 
                        attribute._dbus_get_args_options
1188
 
                        ["byte_arrays"])
1189
 
                                      (types.FunctionType(
1190
 
                                          attribute.func_code,
1191
 
                                          attribute.func_globals,
1192
 
                                          attribute.func_name,
1193
 
                                          attribute.func_defaults,
1194
 
                                          attribute.func_closure)))
1195
 
                    # Copy annotations, if any
1196
 
                    try:
1197
 
                        attr[attrname]._dbus_annotations = dict(
1198
 
                            attribute._dbus_annotations)
1199
 
                    except AttributeError:
1200
 
                        pass
1201
 
                # Is this a D-Bus interface?
1202
 
                elif getattr(attribute, "_dbus_is_interface", False):
1203
 
                    # Create a new, but exactly alike, function
1204
 
                    # object.  Decorate it to be a new D-Bus interface
1205
 
                    # with the alternate D-Bus interface name.  Add it
1206
 
                    # to the class.
1207
 
                    attr[attrname] = (
1208
 
                        dbus_interface_annotations(alt_interface)
1209
 
                        (types.FunctionType(attribute.func_code,
1210
 
                                            attribute.func_globals,
1211
 
                                            attribute.func_name,
1212
 
                                            attribute.func_defaults,
1213
 
                                            attribute.func_closure)))
1214
 
            if deprecate:
1215
 
                # Deprecate all alternate interfaces
1216
 
                iname="_AlternateDBusNames_interface_annotation{}"
1217
 
                for interface_name in interface_names:
1218
 
                    
1219
 
                    @dbus_interface_annotations(interface_name)
1220
 
                    def func(self):
1221
 
                        return { "org.freedesktop.DBus.Deprecated":
1222
 
                                 "true" }
1223
 
                    # Find an unused name
1224
 
                    for aname in (iname.format(i)
1225
 
                                  for i in itertools.count()):
1226
 
                        if aname not in attr:
1227
 
                            attr[aname] = func
1228
 
                            break
1229
 
            if interface_names:
1230
 
                # Replace the class with a new subclass of it with
1231
 
                # methods, signals, etc. as created above.
1232
 
                cls = type(b"{}Alternate".format(cls.__name__),
1233
 
                           (cls, ), attr)
1234
 
        return cls
1235
 
    
1236
 
    return wrapper
1237
 
 
1238
 
 
1239
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1240
 
                            "se.bsnet.fukt.Mandos"})
1241
 
class ClientDBus(Client, DBusObjectWithProperties):
1242
 
    """A Client class using D-Bus
1243
 
    
1244
 
    Attributes:
1245
 
    dbus_object_path: dbus.ObjectPath
1246
 
    bus: dbus.SystemBus()
1247
 
    """
1248
 
    
1249
 
    runtime_expansions = (Client.runtime_expansions
1250
 
                          + ("dbus_object_path", ))
1251
 
    
1252
 
    _interface = "se.recompile.Mandos.Client"
1253
 
    
1254
 
    # dbus.service.Object doesn't use super(), so we can't either.
1255
 
    
1256
 
    def __init__(self, bus = None, *args, **kwargs):
1257
 
        self.bus = bus
1258
 
        Client.__init__(self, *args, **kwargs)
1259
 
        # Only now, when this client is initialized, can it show up on
1260
 
        # the D-Bus
1261
 
        client_object_name = str(self.name).translate(
1262
 
            {ord("."): ord("_"),
1263
 
             ord("-"): ord("_")})
1264
 
        self.dbus_object_path = dbus.ObjectPath(
1265
 
            "/clients/" + client_object_name)
1266
 
        DBusObjectWithProperties.__init__(self, self.bus,
1267
 
                                          self.dbus_object_path)
1268
 
    
1269
 
    def notifychangeproperty(transform_func, dbus_name,
1270
 
                             type_func=lambda x: x,
1271
 
                             variant_level=1,
1272
 
                             invalidate_only=False,
1273
 
                             _interface=_interface):
1274
 
        """ Modify a variable so that it's a property which announces
1275
 
        its changes to DBus.
1276
 
        
1277
 
        transform_fun: Function that takes a value and a variant_level
1278
 
                       and transforms it to a D-Bus type.
1279
 
        dbus_name: D-Bus name of the variable
1280
 
        type_func: Function that transform the value before sending it
1281
 
                   to the D-Bus.  Default: no transform
1282
 
        variant_level: D-Bus variant level.  Default: 1
1283
 
        """
1284
 
        attrname = "_{}".format(dbus_name)
1285
 
        
1286
 
        def setter(self, value):
1287
 
            if hasattr(self, "dbus_object_path"):
1288
 
                if (not hasattr(self, attrname) or
1289
 
                    type_func(getattr(self, attrname, None))
1290
 
                    != type_func(value)):
1291
 
                    if invalidate_only:
1292
 
                        self.PropertiesChanged(
1293
 
                            _interface, dbus.Dictionary(),
1294
 
                            dbus.Array((dbus_name, )))
1295
 
                    else:
1296
 
                        dbus_value = transform_func(
1297
 
                            type_func(value),
1298
 
                            variant_level = variant_level)
1299
 
                        self.PropertyChanged(dbus.String(dbus_name),
1300
 
                                             dbus_value)
1301
 
                        self.PropertiesChanged(
1302
 
                            _interface,
1303
 
                            dbus.Dictionary({ dbus.String(dbus_name):
1304
 
                                              dbus_value }),
1305
 
                            dbus.Array())
1306
 
            setattr(self, attrname, value)
1307
 
        
1308
 
        return property(lambda self: getattr(self, attrname), setter)
1309
 
    
1310
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1311
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1312
 
                                             "ApprovalPending",
1313
 
                                             type_func = bool)
1314
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1315
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1316
 
                                        "LastEnabled")
1317
 
    checker = notifychangeproperty(
1318
 
        dbus.Boolean, "CheckerRunning",
1319
 
        type_func = lambda checker: checker is not None)
1320
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1321
 
                                           "LastCheckedOK")
1322
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1323
 
                                               "LastCheckerStatus")
1324
 
    last_approval_request = notifychangeproperty(
1325
 
        datetime_to_dbus, "LastApprovalRequest")
1326
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1327
 
                                               "ApprovedByDefault")
1328
 
    approval_delay = notifychangeproperty(
1329
 
        dbus.UInt64, "ApprovalDelay",
1330
 
        type_func = lambda td: td.total_seconds() * 1000)
1331
 
    approval_duration = notifychangeproperty(
1332
 
        dbus.UInt64, "ApprovalDuration",
1333
 
        type_func = lambda td: td.total_seconds() * 1000)
1334
 
    host = notifychangeproperty(dbus.String, "Host")
1335
 
    timeout = notifychangeproperty(
1336
 
        dbus.UInt64, "Timeout",
1337
 
        type_func = lambda td: td.total_seconds() * 1000)
1338
 
    extended_timeout = notifychangeproperty(
1339
 
        dbus.UInt64, "ExtendedTimeout",
1340
 
        type_func = lambda td: td.total_seconds() * 1000)
1341
 
    interval = notifychangeproperty(
1342
 
        dbus.UInt64, "Interval",
1343
 
        type_func = lambda td: td.total_seconds() * 1000)
1344
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1345
 
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
1346
 
                                  invalidate_only=True)
1347
 
    
1348
 
    del notifychangeproperty
1349
 
    
1350
 
    def __del__(self, *args, **kwargs):
1351
 
        try:
1352
 
            self.remove_from_connection()
1353
 
        except LookupError:
1354
 
            pass
1355
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1356
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1357
 
        Client.__del__(self, *args, **kwargs)
1358
 
    
1359
 
    def checker_callback(self, pid, condition, command,
1360
 
                         *args, **kwargs):
1361
 
        self.checker_callback_tag = None
1362
 
        self.checker = None
1363
 
        if os.WIFEXITED(condition):
1364
 
            exitstatus = os.WEXITSTATUS(condition)
1365
 
            # Emit D-Bus signal
1366
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1367
 
                                  dbus.Int64(condition),
1368
 
                                  dbus.String(command))
1369
 
        else:
1370
 
            # Emit D-Bus signal
1371
 
            self.CheckerCompleted(dbus.Int16(-1),
1372
 
                                  dbus.Int64(condition),
1373
 
                                  dbus.String(command))
1374
 
        
1375
 
        return Client.checker_callback(self, pid, condition, command,
1376
 
                                       *args, **kwargs)
1377
 
    
1378
 
    def start_checker(self, *args, **kwargs):
1379
 
        old_checker_pid = getattr(self.checker, "pid", None)
1380
 
        r = Client.start_checker(self, *args, **kwargs)
1381
 
        # Only if new checker process was started
1382
 
        if (self.checker is not None
1383
 
            and old_checker_pid != self.checker.pid):
1384
 
            # Emit D-Bus signal
1385
 
            self.CheckerStarted(self.current_checker_command)
1386
 
        return r
1387
 
    
1388
 
    def _reset_approved(self):
1389
 
        self.approved = None
1390
 
        return False
1391
 
    
1392
 
    def approve(self, value=True):
1393
 
        self.approved = value
1394
 
        gobject.timeout_add(int(self.approval_duration.total_seconds()
1395
 
                                * 1000), self._reset_approved)
1396
 
        self.send_changedstate()
1397
 
    
1398
 
    ## D-Bus methods, signals & properties
1399
 
    
1400
 
    ## Interfaces
1401
 
    
1402
 
    ## Signals
1403
 
    
1404
 
    # CheckerCompleted - signal
1405
 
    @dbus.service.signal(_interface, signature="nxs")
1406
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1407
 
        "D-Bus signal"
1408
 
        pass
1409
 
    
1410
 
    # CheckerStarted - signal
1411
 
    @dbus.service.signal(_interface, signature="s")
1412
 
    def CheckerStarted(self, command):
1413
 
        "D-Bus signal"
1414
 
        pass
1415
 
    
1416
 
    # PropertyChanged - signal
1417
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1418
 
    @dbus.service.signal(_interface, signature="sv")
1419
 
    def PropertyChanged(self, property, value):
1420
 
        "D-Bus signal"
1421
 
        pass
1422
 
    
1423
 
    # GotSecret - signal
1424
 
    @dbus.service.signal(_interface)
1425
 
    def GotSecret(self):
1426
 
        """D-Bus signal
1427
 
        Is sent after a successful transfer of secret from the Mandos
1428
 
        server to mandos-client
1429
 
        """
1430
 
        pass
1431
 
    
1432
 
    # Rejected - signal
1433
 
    @dbus.service.signal(_interface, signature="s")
1434
 
    def Rejected(self, reason):
1435
 
        "D-Bus signal"
1436
 
        pass
1437
 
    
1438
 
    # NeedApproval - signal
1439
 
    @dbus.service.signal(_interface, signature="tb")
1440
 
    def NeedApproval(self, timeout, default):
1441
 
        "D-Bus signal"
1442
 
        return self.need_approval()
1443
 
    
1444
 
    ## Methods
1445
 
    
1446
 
    # Approve - method
1447
 
    @dbus.service.method(_interface, in_signature="b")
1448
 
    def Approve(self, value):
1449
 
        self.approve(value)
1450
 
    
1451
 
    # CheckedOK - method
1452
 
    @dbus.service.method(_interface)
1453
 
    def CheckedOK(self):
1454
 
        self.checked_ok()
1455
 
    
1456
 
    # Enable - method
1457
 
    @dbus.service.method(_interface)
1458
 
    def Enable(self):
1459
 
        "D-Bus method"
1460
 
        self.enable()
1461
 
    
1462
 
    # StartChecker - method
1463
 
    @dbus.service.method(_interface)
1464
 
    def StartChecker(self):
1465
 
        "D-Bus method"
1466
 
        self.start_checker()
1467
 
    
1468
 
    # Disable - method
1469
 
    @dbus.service.method(_interface)
1470
 
    def Disable(self):
1471
 
        "D-Bus method"
1472
 
        self.disable()
1473
 
    
1474
 
    # StopChecker - method
1475
 
    @dbus.service.method(_interface)
1476
 
    def StopChecker(self):
1477
 
        self.stop_checker()
1478
 
    
1479
 
    ## Properties
1480
 
    
1481
 
    # ApprovalPending - property
1482
 
    @dbus_service_property(_interface, signature="b", access="read")
1483
 
    def ApprovalPending_dbus_property(self):
1484
 
        return dbus.Boolean(bool(self.approvals_pending))
1485
 
    
1486
 
    # ApprovedByDefault - property
1487
 
    @dbus_service_property(_interface,
1488
 
                           signature="b",
1489
 
                           access="readwrite")
1490
 
    def ApprovedByDefault_dbus_property(self, value=None):
1491
 
        if value is None:       # get
1492
 
            return dbus.Boolean(self.approved_by_default)
1493
 
        self.approved_by_default = bool(value)
1494
 
    
1495
 
    # ApprovalDelay - property
1496
 
    @dbus_service_property(_interface,
1497
 
                           signature="t",
1498
 
                           access="readwrite")
1499
 
    def ApprovalDelay_dbus_property(self, value=None):
1500
 
        if value is None:       # get
1501
 
            return dbus.UInt64(self.approval_delay.total_seconds()
1502
 
                               * 1000)
1503
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1504
 
    
1505
 
    # ApprovalDuration - property
1506
 
    @dbus_service_property(_interface,
1507
 
                           signature="t",
1508
 
                           access="readwrite")
1509
 
    def ApprovalDuration_dbus_property(self, value=None):
1510
 
        if value is None:       # get
1511
 
            return dbus.UInt64(self.approval_duration.total_seconds()
1512
 
                               * 1000)
1513
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1514
 
    
1515
 
    # Name - property
1516
 
    @dbus_service_property(_interface, signature="s", access="read")
1517
 
    def Name_dbus_property(self):
1518
 
        return dbus.String(self.name)
1519
 
    
1520
 
    # Fingerprint - property
1521
 
    @dbus_service_property(_interface, signature="s", access="read")
1522
 
    def Fingerprint_dbus_property(self):
1523
 
        return dbus.String(self.fingerprint)
1524
 
    
1525
 
    # Host - property
1526
 
    @dbus_service_property(_interface,
1527
 
                           signature="s",
1528
 
                           access="readwrite")
1529
 
    def Host_dbus_property(self, value=None):
1530
 
        if value is None:       # get
1531
 
            return dbus.String(self.host)
1532
 
        self.host = str(value)
1533
 
    
1534
 
    # Created - property
1535
 
    @dbus_service_property(_interface, signature="s", access="read")
1536
 
    def Created_dbus_property(self):
1537
 
        return datetime_to_dbus(self.created)
1538
 
    
1539
 
    # LastEnabled - property
1540
 
    @dbus_service_property(_interface, signature="s", access="read")
1541
 
    def LastEnabled_dbus_property(self):
1542
 
        return datetime_to_dbus(self.last_enabled)
1543
 
    
1544
 
    # Enabled - property
1545
 
    @dbus_service_property(_interface,
1546
 
                           signature="b",
1547
 
                           access="readwrite")
1548
 
    def Enabled_dbus_property(self, value=None):
1549
 
        if value is None:       # get
1550
 
            return dbus.Boolean(self.enabled)
1551
 
        if value:
1552
 
            self.enable()
1553
 
        else:
1554
 
            self.disable()
1555
 
    
1556
 
    # LastCheckedOK - property
1557
 
    @dbus_service_property(_interface,
1558
 
                           signature="s",
1559
 
                           access="readwrite")
1560
 
    def LastCheckedOK_dbus_property(self, value=None):
1561
 
        if value is not None:
1562
 
            self.checked_ok()
1563
 
            return
1564
 
        return datetime_to_dbus(self.last_checked_ok)
1565
 
    
1566
 
    # LastCheckerStatus - property
1567
 
    @dbus_service_property(_interface, signature="n", access="read")
1568
 
    def LastCheckerStatus_dbus_property(self):
1569
 
        return dbus.Int16(self.last_checker_status)
1570
 
    
1571
 
    # Expires - property
1572
 
    @dbus_service_property(_interface, signature="s", access="read")
1573
 
    def Expires_dbus_property(self):
1574
 
        return datetime_to_dbus(self.expires)
1575
 
    
1576
 
    # LastApprovalRequest - property
1577
 
    @dbus_service_property(_interface, signature="s", access="read")
1578
 
    def LastApprovalRequest_dbus_property(self):
1579
 
        return datetime_to_dbus(self.last_approval_request)
1580
 
    
1581
 
    # Timeout - property
1582
 
    @dbus_service_property(_interface,
1583
 
                           signature="t",
1584
 
                           access="readwrite")
1585
 
    def Timeout_dbus_property(self, value=None):
1586
 
        if value is None:       # get
1587
 
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
1588
 
        old_timeout = self.timeout
1589
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1590
 
        # Reschedule disabling
1591
 
        if self.enabled:
1592
 
            now = datetime.datetime.utcnow()
1593
 
            self.expires += self.timeout - old_timeout
1594
 
            if self.expires <= now:
1595
 
                # The timeout has passed
1596
 
                self.disable()
1597
 
            else:
1598
 
                if (getattr(self, "disable_initiator_tag", None)
1599
 
                    is None):
1600
 
                    return
1601
 
                gobject.source_remove(self.disable_initiator_tag)
1602
 
                self.disable_initiator_tag = gobject.timeout_add(
1603
 
                    int((self.expires - now).total_seconds() * 1000),
1604
 
                    self.disable)
1605
 
    
1606
 
    # ExtendedTimeout - property
1607
 
    @dbus_service_property(_interface,
1608
 
                           signature="t",
1609
 
                           access="readwrite")
1610
 
    def ExtendedTimeout_dbus_property(self, value=None):
1611
 
        if value is None:       # get
1612
 
            return dbus.UInt64(self.extended_timeout.total_seconds()
1613
 
                               * 1000)
1614
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1615
 
    
1616
 
    # Interval - property
1617
 
    @dbus_service_property(_interface,
1618
 
                           signature="t",
1619
 
                           access="readwrite")
1620
 
    def Interval_dbus_property(self, value=None):
1621
 
        if value is None:       # get
1622
 
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1623
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1624
 
        if getattr(self, "checker_initiator_tag", None) is None:
1625
 
            return
1626
 
        if self.enabled:
1627
 
            # Reschedule checker run
1628
 
            gobject.source_remove(self.checker_initiator_tag)
1629
 
            self.checker_initiator_tag = gobject.timeout_add(
1630
 
                value, self.start_checker)
1631
 
            self.start_checker() # Start one now, too
1632
 
    
1633
 
    # Checker - property
1634
 
    @dbus_service_property(_interface,
1635
 
                           signature="s",
1636
 
                           access="readwrite")
1637
 
    def Checker_dbus_property(self, value=None):
1638
 
        if value is None:       # get
1639
 
            return dbus.String(self.checker_command)
1640
 
        self.checker_command = str(value)
1641
 
    
1642
 
    # CheckerRunning - property
1643
 
    @dbus_service_property(_interface,
1644
 
                           signature="b",
1645
 
                           access="readwrite")
1646
 
    def CheckerRunning_dbus_property(self, value=None):
1647
 
        if value is None:       # get
1648
 
            return dbus.Boolean(self.checker is not None)
1649
 
        if value:
1650
 
            self.start_checker()
1651
 
        else:
1652
 
            self.stop_checker()
1653
 
    
1654
 
    # ObjectPath - property
1655
 
    @dbus_service_property(_interface, signature="o", access="read")
1656
 
    def ObjectPath_dbus_property(self):
1657
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1658
 
    
1659
 
    # Secret = property
1660
 
    @dbus_service_property(_interface,
1661
 
                           signature="ay",
1662
 
                           access="write",
1663
 
                           byte_arrays=True)
1664
 
    def Secret_dbus_property(self, value):
1665
 
        self.secret = bytes(value)
1666
 
    
1667
 
    del _interface
1668
 
 
1669
 
 
1670
 
class ProxyClient(object):
1671
 
    def __init__(self, child_pipe, fpr, address):
1672
 
        self._pipe = child_pipe
1673
 
        self._pipe.send(('init', fpr, address))
1674
 
        if not self._pipe.recv():
1675
 
            raise KeyError()
1676
 
    
1677
 
    def __getattribute__(self, name):
1678
 
        if name == '_pipe':
1679
 
            return super(ProxyClient, self).__getattribute__(name)
1680
 
        self._pipe.send(('getattr', name))
1681
 
        data = self._pipe.recv()
1682
 
        if data[0] == 'data':
1683
 
            return data[1]
1684
 
        if data[0] == 'function':
1685
 
            
1686
 
            def func(*args, **kwargs):
1687
 
                self._pipe.send(('funcall', name, args, kwargs))
1688
 
                return self._pipe.recv()[1]
1689
 
            
1690
 
            return func
1691
 
    
1692
 
    def __setattr__(self, name, value):
1693
 
        if name == '_pipe':
1694
 
            return super(ProxyClient, self).__setattr__(name, value)
1695
 
        self._pipe.send(('setattr', name, value))
1696
 
 
1697
 
 
1698
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1699
 
    """A class to handle client connections.
1700
 
    
1701
 
    Instantiated once for each connection to handle it.
 
303
    def still_valid(self, now=None):
 
304
        """Has the timeout not yet passed for this client?"""
 
305
        if now is None:
 
306
            now = datetime.datetime.now()
 
307
        if self.last_seen is None:
 
308
            return now < (self.created + self.timeout)
 
309
        else:
 
310
            return now < (self.last_seen + self.timeout)
 
311
 
 
312
 
 
313
def peer_certificate(session):
 
314
    "Return the peer's OpenPGP certificate as a bytestring"
 
315
    # If not an OpenPGP certificate...
 
316
    if gnutls.library.functions.gnutls_certificate_type_get\
 
317
            (session._c_object) \
 
318
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
319
        # ...do the normal thing
 
320
        return session.peer_certificate
 
321
    list_size = ctypes.c_uint()
 
322
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
323
        (session._c_object, ctypes.byref(list_size))
 
324
    if list_size.value == 0:
 
325
        return None
 
326
    cert = cert_list[0]
 
327
    return ctypes.string_at(cert.data, cert.size)
 
328
 
 
329
 
 
330
def fingerprint(openpgp):
 
331
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
332
    # New empty GnuTLS certificate
 
333
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
334
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
335
        (ctypes.byref(crt))
 
336
    # New GnuTLS "datum" with the OpenPGP public key
 
337
    datum = gnutls.library.types.gnutls_datum_t\
 
338
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
339
                     ctypes.POINTER(ctypes.c_ubyte)),
 
340
         ctypes.c_uint(len(openpgp)))
 
341
    # Import the OpenPGP public key into the certificate
 
342
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
343
        (crt,
 
344
         ctypes.byref(datum),
 
345
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
346
    # New buffer for the fingerprint
 
347
    buffer = ctypes.create_string_buffer(20)
 
348
    buffer_length = ctypes.c_size_t()
 
349
    # Get the fingerprint from the certificate into the buffer
 
350
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
351
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
352
    # Deinit the certificate
 
353
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
354
    # Convert the buffer to a Python bytestring
 
355
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
356
    # Convert the bytestring to hexadecimal notation
 
357
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
358
    return hex_fpr
 
359
 
 
360
 
 
361
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
362
    """A TCP request handler class.
 
363
    Instantiated by IPv6_TCPServer for each request to handle it.
1702
364
    Note: This will run in its own forked process."""
1703
365
    
1704
366
    def handle(self):
1705
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1706
 
            logger.info("TCP connection from: %s",
1707
 
                        str(self.client_address))
1708
 
            logger.debug("Pipe FD: %d",
1709
 
                         self.server.child_pipe.fileno())
1710
 
            
1711
 
            session = gnutls.connection.ClientSession(
1712
 
                self.request, gnutls.connection .X509Credentials())
1713
 
            
1714
 
            # Note: gnutls.connection.X509Credentials is really a
1715
 
            # generic GnuTLS certificate credentials object so long as
1716
 
            # no X.509 keys are added to it.  Therefore, we can use it
1717
 
            # here despite using OpenPGP certificates.
1718
 
            
1719
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1720
 
            #                      "+AES-256-CBC", "+SHA1",
1721
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1722
 
            #                      "+DHE-DSS"))
1723
 
            # Use a fallback default, since this MUST be set.
1724
 
            priority = self.server.gnutls_priority
1725
 
            if priority is None:
1726
 
                priority = "NORMAL"
1727
 
            gnutls.library.functions.gnutls_priority_set_direct(
1728
 
                session._c_object, priority, None)
1729
 
            
1730
 
            # Start communication using the Mandos protocol
1731
 
            # Get protocol number
1732
 
            line = self.request.makefile().readline()
1733
 
            logger.debug("Protocol version: %r", line)
1734
 
            try:
1735
 
                if int(line.strip().split()[0]) > 1:
1736
 
                    raise RuntimeError(line)
1737
 
            except (ValueError, IndexError, RuntimeError) as error:
1738
 
                logger.error("Unknown protocol version: %s", error)
1739
 
                return
1740
 
            
1741
 
            # Start GnuTLS connection
1742
 
            try:
1743
 
                session.handshake()
1744
 
            except gnutls.errors.GNUTLSError as error:
1745
 
                logger.warning("Handshake failed: %s", error)
1746
 
                # Do not run session.bye() here: the session is not
1747
 
                # established.  Just abandon the request.
1748
 
                return
1749
 
            logger.debug("Handshake succeeded")
1750
 
            
1751
 
            approval_required = False
1752
 
            try:
1753
 
                try:
1754
 
                    fpr = self.fingerprint(
1755
 
                        self.peer_certificate(session))
1756
 
                except (TypeError,
1757
 
                        gnutls.errors.GNUTLSError) as error:
1758
 
                    logger.warning("Bad certificate: %s", error)
1759
 
                    return
1760
 
                logger.debug("Fingerprint: %s", fpr)
1761
 
                
1762
 
                try:
1763
 
                    client = ProxyClient(child_pipe, fpr,
1764
 
                                         self.client_address)
1765
 
                except KeyError:
1766
 
                    return
1767
 
                
1768
 
                if client.approval_delay:
1769
 
                    delay = client.approval_delay
1770
 
                    client.approvals_pending += 1
1771
 
                    approval_required = True
1772
 
                
1773
 
                while True:
1774
 
                    if not client.enabled:
1775
 
                        logger.info("Client %s is disabled",
1776
 
                                    client.name)
1777
 
                        if self.server.use_dbus:
1778
 
                            # Emit D-Bus signal
1779
 
                            client.Rejected("Disabled")
1780
 
                        return
1781
 
                    
1782
 
                    if client.approved or not client.approval_delay:
1783
 
                        #We are approved or approval is disabled
1784
 
                        break
1785
 
                    elif client.approved is None:
1786
 
                        logger.info("Client %s needs approval",
1787
 
                                    client.name)
1788
 
                        if self.server.use_dbus:
1789
 
                            # Emit D-Bus signal
1790
 
                            client.NeedApproval(
1791
 
                                client.approval_delay.total_seconds()
1792
 
                                * 1000, client.approved_by_default)
1793
 
                    else:
1794
 
                        logger.warning("Client %s was not approved",
1795
 
                                       client.name)
1796
 
                        if self.server.use_dbus:
1797
 
                            # Emit D-Bus signal
1798
 
                            client.Rejected("Denied")
1799
 
                        return
1800
 
                    
1801
 
                    #wait until timeout or approved
1802
 
                    time = datetime.datetime.now()
1803
 
                    client.changedstate.acquire()
1804
 
                    client.changedstate.wait(delay.total_seconds())
1805
 
                    client.changedstate.release()
1806
 
                    time2 = datetime.datetime.now()
1807
 
                    if (time2 - time) >= delay:
1808
 
                        if not client.approved_by_default:
1809
 
                            logger.warning("Client %s timed out while"
1810
 
                                           " waiting for approval",
1811
 
                                           client.name)
1812
 
                            if self.server.use_dbus:
1813
 
                                # Emit D-Bus signal
1814
 
                                client.Rejected("Approval timed out")
1815
 
                            return
1816
 
                        else:
1817
 
                            break
1818
 
                    else:
1819
 
                        delay -= time2 - time
1820
 
                
1821
 
                sent_size = 0
1822
 
                while sent_size < len(client.secret):
1823
 
                    try:
1824
 
                        sent = session.send(client.secret[sent_size:])
1825
 
                    except gnutls.errors.GNUTLSError as error:
1826
 
                        logger.warning("gnutls send failed",
1827
 
                                       exc_info=error)
1828
 
                        return
1829
 
                    logger.debug("Sent: %d, remaining: %d", sent,
1830
 
                                 len(client.secret) - (sent_size
1831
 
                                                       + sent))
1832
 
                    sent_size += sent
1833
 
                
1834
 
                logger.info("Sending secret to %s", client.name)
1835
 
                # bump the timeout using extended_timeout
1836
 
                client.bump_timeout(client.extended_timeout)
1837
 
                if self.server.use_dbus:
1838
 
                    # Emit D-Bus signal
1839
 
                    client.GotSecret()
1840
 
            
1841
 
            finally:
1842
 
                if approval_required:
1843
 
                    client.approvals_pending -= 1
1844
 
                try:
1845
 
                    session.bye()
1846
 
                except gnutls.errors.GNUTLSError as error:
1847
 
                    logger.warning("GnuTLS bye failed",
1848
 
                                   exc_info=error)
1849
 
    
1850
 
    @staticmethod
1851
 
    def peer_certificate(session):
1852
 
        "Return the peer's OpenPGP certificate as a bytestring"
1853
 
        # If not an OpenPGP certificate...
1854
 
        if (gnutls.library.functions.gnutls_certificate_type_get(
1855
 
                session._c_object)
1856
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1857
 
            # ...do the normal thing
1858
 
            return session.peer_certificate
1859
 
        list_size = ctypes.c_uint(1)
1860
 
        cert_list = (gnutls.library.functions
1861
 
                     .gnutls_certificate_get_peers
1862
 
                     (session._c_object, ctypes.byref(list_size)))
1863
 
        if not bool(cert_list) and list_size.value != 0:
1864
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1865
 
                                            " certificate")
1866
 
        if list_size.value == 0:
1867
 
            return None
1868
 
        cert = cert_list[0]
1869
 
        return ctypes.string_at(cert.data, cert.size)
1870
 
    
1871
 
    @staticmethod
1872
 
    def fingerprint(openpgp):
1873
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1874
 
        # New GnuTLS "datum" with the OpenPGP public key
1875
 
        datum = gnutls.library.types.gnutls_datum_t(
1876
 
            ctypes.cast(ctypes.c_char_p(openpgp),
1877
 
                        ctypes.POINTER(ctypes.c_ubyte)),
1878
 
            ctypes.c_uint(len(openpgp)))
1879
 
        # New empty GnuTLS certificate
1880
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1881
 
        gnutls.library.functions.gnutls_openpgp_crt_init(
1882
 
            ctypes.byref(crt))
1883
 
        # Import the OpenPGP public key into the certificate
1884
 
        gnutls.library.functions.gnutls_openpgp_crt_import(
1885
 
            crt, ctypes.byref(datum),
1886
 
            gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1887
 
        # Verify the self signature in the key
1888
 
        crtverify = ctypes.c_uint()
1889
 
        gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1890
 
            crt, 0, ctypes.byref(crtverify))
1891
 
        if crtverify.value != 0:
1892
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1893
 
            raise gnutls.errors.CertificateSecurityError(
1894
 
                "Verify failed")
1895
 
        # New buffer for the fingerprint
1896
 
        buf = ctypes.create_string_buffer(20)
1897
 
        buf_len = ctypes.c_size_t()
1898
 
        # Get the fingerprint from the certificate into the buffer
1899
 
        gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1900
 
            crt, ctypes.byref(buf), ctypes.byref(buf_len))
1901
 
        # Deinit the certificate
1902
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1903
 
        # Convert the buffer to a Python bytestring
1904
 
        fpr = ctypes.string_at(buf, buf_len.value)
1905
 
        # Convert the bytestring to hexadecimal notation
1906
 
        hex_fpr = binascii.hexlify(fpr).upper()
1907
 
        return hex_fpr
1908
 
 
1909
 
 
1910
 
class MultiprocessingMixIn(object):
1911
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1912
 
    
1913
 
    def sub_process_main(self, request, address):
1914
 
        try:
1915
 
            self.finish_request(request, address)
1916
 
        except Exception:
1917
 
            self.handle_error(request, address)
1918
 
        self.close_request(request)
1919
 
    
1920
 
    def process_request(self, request, address):
1921
 
        """Start a new process to process the request."""
1922
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1923
 
                                       args = (request, address))
1924
 
        proc.start()
1925
 
        return proc
1926
 
 
1927
 
 
1928
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1929
 
    """ adds a pipe to the MixIn """
1930
 
    
1931
 
    def process_request(self, request, client_address):
1932
 
        """Overrides and wraps the original process_request().
1933
 
        
1934
 
        This function creates a new pipe in self.pipe
1935
 
        """
1936
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1937
 
        
1938
 
        proc = MultiprocessingMixIn.process_request(self, request,
1939
 
                                                    client_address)
1940
 
        self.child_pipe.close()
1941
 
        self.add_pipe(parent_pipe, proc)
1942
 
    
1943
 
    def add_pipe(self, parent_pipe, proc):
1944
 
        """Dummy function; override as necessary"""
1945
 
        raise NotImplementedError()
1946
 
 
1947
 
 
1948
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1949
 
                     socketserver.TCPServer, object):
1950
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1951
 
    
 
367
        logger.debug(u"TCP connection from: %s",
 
368
                     unicode(self.client_address))
 
369
        session = gnutls.connection.ClientSession(self.request,
 
370
                                                  gnutls.connection.\
 
371
                                                  X509Credentials())
 
372
        
 
373
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
374
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
375
        #                "+DHE-DSS"))
 
376
        priority = "NORMAL"
 
377
        if self.server.options.priority:
 
378
            priority = self.server.options.priority
 
379
        gnutls.library.functions.gnutls_priority_set_direct\
 
380
            (session._c_object, priority, None);
 
381
        
 
382
        try:
 
383
            session.handshake()
 
384
        except gnutls.errors.GNUTLSError, error:
 
385
            logger.debug(u"Handshake failed: %s", error)
 
386
            # Do not run session.bye() here: the session is not
 
387
            # established.  Just abandon the request.
 
388
            return
 
389
        try:
 
390
            fpr = fingerprint(peer_certificate(session))
 
391
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
392
            logger.debug(u"Bad certificate: %s", error)
 
393
            session.bye()
 
394
            return
 
395
        logger.debug(u"Fingerprint: %s", fpr)
 
396
        client = None
 
397
        for c in self.server.clients:
 
398
            if c.fingerprint == fpr:
 
399
                client = c
 
400
                break
 
401
        # Have to check if client.still_valid(), since it is possible
 
402
        # that the client timed out while establishing the GnuTLS
 
403
        # session.
 
404
        if (not client) or (not client.still_valid()):
 
405
            if client:
 
406
                logger.debug(u"Client %(name)s is invalid",
 
407
                             vars(client))
 
408
            else:
 
409
                logger.debug(u"Client not found for fingerprint: %s",
 
410
                             fpr)
 
411
            session.bye()
 
412
            return
 
413
        sent_size = 0
 
414
        while sent_size < len(client.secret):
 
415
            sent = session.send(client.secret[sent_size:])
 
416
            logger.debug(u"Sent: %d, remaining: %d",
 
417
                         sent, len(client.secret)
 
418
                         - (sent_size + sent))
 
419
            sent_size += sent
 
420
        session.bye()
 
421
 
 
422
 
 
423
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
424
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1952
425
    Attributes:
1953
 
        enabled:        Boolean; whether this server is activated yet
1954
 
        interface:      None or a network interface name (string)
1955
 
        use_ipv6:       Boolean; to use IPv6 or not
 
426
        options:        Command line options
 
427
        clients:        Set() of Client objects
1956
428
    """
1957
 
    
1958
 
    def __init__(self, server_address, RequestHandlerClass,
1959
 
                 interface=None,
1960
 
                 use_ipv6=True,
1961
 
                 socketfd=None):
1962
 
        """If socketfd is set, use that file descriptor instead of
1963
 
        creating a new one with socket.socket().
1964
 
        """
1965
 
        self.interface = interface
1966
 
        if use_ipv6:
1967
 
            self.address_family = socket.AF_INET6
1968
 
        if socketfd is not None:
1969
 
            # Save the file descriptor
1970
 
            self.socketfd = socketfd
1971
 
            # Save the original socket.socket() function
1972
 
            self.socket_socket = socket.socket
1973
 
            # To implement --socket, we monkey patch socket.socket.
1974
 
            # 
1975
 
            # (When socketserver.TCPServer is a new-style class, we
1976
 
            # could make self.socket into a property instead of monkey
1977
 
            # patching socket.socket.)
1978
 
            # 
1979
 
            # Create a one-time-only replacement for socket.socket()
1980
 
            @functools.wraps(socket.socket)
1981
 
            def socket_wrapper(*args, **kwargs):
1982
 
                # Restore original function so subsequent calls are
1983
 
                # not affected.
1984
 
                socket.socket = self.socket_socket
1985
 
                del self.socket_socket
1986
 
                # This time only, return a new socket object from the
1987
 
                # saved file descriptor.
1988
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1989
 
            # Replace socket.socket() function with wrapper
1990
 
            socket.socket = socket_wrapper
1991
 
        # The socketserver.TCPServer.__init__ will call
1992
 
        # socket.socket(), which might be our replacement,
1993
 
        # socket_wrapper(), if socketfd was set.
1994
 
        socketserver.TCPServer.__init__(self, server_address,
1995
 
                                        RequestHandlerClass)
1996
 
    
 
429
    address_family = socket.AF_INET6
 
430
    def __init__(self, *args, **kwargs):
 
431
        if "options" in kwargs:
 
432
            self.options = kwargs["options"]
 
433
            del kwargs["options"]
 
434
        if "clients" in kwargs:
 
435
            self.clients = kwargs["clients"]
 
436
            del kwargs["clients"]
 
437
        return super(type(self), self).__init__(*args, **kwargs)
1997
438
    def server_bind(self):
1998
439
        """This overrides the normal server_bind() function
1999
440
        to bind to an interface if one was specified, and also NOT to
2000
441
        bind to an address or port if they were not specified."""
2001
 
        if self.interface is not None:
2002
 
            if SO_BINDTODEVICE is None:
2003
 
                logger.error("SO_BINDTODEVICE does not exist;"
2004
 
                             " cannot bind to interface %s",
2005
 
                             self.interface)
2006
 
            else:
2007
 
                try:
2008
 
                    self.socket.setsockopt(
2009
 
                        socket.SOL_SOCKET, SO_BINDTODEVICE,
2010
 
                        (self.interface + "\0").encode("utf-8"))
2011
 
                except socket.error as error:
2012
 
                    if error.errno == errno.EPERM:
2013
 
                        logger.error("No permission to bind to"
2014
 
                                     " interface %s", self.interface)
2015
 
                    elif error.errno == errno.ENOPROTOOPT:
2016
 
                        logger.error("SO_BINDTODEVICE not available;"
2017
 
                                     " cannot bind to interface %s",
2018
 
                                     self.interface)
2019
 
                    elif error.errno == errno.ENODEV:
2020
 
                        logger.error("Interface %s does not exist,"
2021
 
                                     " cannot bind", self.interface)
2022
 
                    else:
2023
 
                        raise
 
442
        if self.options.interface:
 
443
            if not hasattr(socket, "SO_BINDTODEVICE"):
 
444
                # From /usr/include/asm-i486/socket.h
 
445
                socket.SO_BINDTODEVICE = 25
 
446
            try:
 
447
                self.socket.setsockopt(socket.SOL_SOCKET,
 
448
                                       socket.SO_BINDTODEVICE,
 
449
                                       self.options.interface)
 
450
            except socket.error, error:
 
451
                if error[0] == errno.EPERM:
 
452
                    logger.warning(u"No permission to"
 
453
                                   u" bind to interface %s",
 
454
                                   self.options.interface)
 
455
                else:
 
456
                    raise error
2024
457
        # Only bind(2) the socket if we really need to.
2025
458
        if self.server_address[0] or self.server_address[1]:
2026
459
            if not self.server_address[0]:
2027
 
                if self.address_family == socket.AF_INET6:
2028
 
                    any_address = "::" # in6addr_any
2029
 
                else:
2030
 
                    any_address = "0.0.0.0" # INADDR_ANY
2031
 
                self.server_address = (any_address,
 
460
                in6addr_any = "::"
 
461
                self.server_address = (in6addr_any,
2032
462
                                       self.server_address[1])
2033
 
            elif not self.server_address[1]:
2034
 
                self.server_address = (self.server_address[0], 0)
2035
 
#                 if self.interface:
2036
 
#                     self.server_address = (self.server_address[0],
2037
 
#                                            0, # port
2038
 
#                                            0, # flowinfo
2039
 
#                                            if_nametoindex
2040
 
#                                            (self.interface))
2041
 
            return socketserver.TCPServer.server_bind(self)
2042
 
 
2043
 
 
2044
 
class MandosServer(IPv6_TCPServer):
2045
 
    """Mandos server.
2046
 
    
2047
 
    Attributes:
2048
 
        clients:        set of Client objects
2049
 
        gnutls_priority GnuTLS priority string
2050
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2051
 
    
2052
 
    Assumes a gobject.MainLoop event loop.
2053
 
    """
2054
 
    
2055
 
    def __init__(self, server_address, RequestHandlerClass,
2056
 
                 interface=None,
2057
 
                 use_ipv6=True,
2058
 
                 clients=None,
2059
 
                 gnutls_priority=None,
2060
 
                 use_dbus=True,
2061
 
                 socketfd=None):
2062
 
        self.enabled = False
2063
 
        self.clients = clients
2064
 
        if self.clients is None:
2065
 
            self.clients = {}
2066
 
        self.use_dbus = use_dbus
2067
 
        self.gnutls_priority = gnutls_priority
2068
 
        IPv6_TCPServer.__init__(self, server_address,
2069
 
                                RequestHandlerClass,
2070
 
                                interface = interface,
2071
 
                                use_ipv6 = use_ipv6,
2072
 
                                socketfd = socketfd)
2073
 
    
2074
 
    def server_activate(self):
2075
 
        if self.enabled:
2076
 
            return socketserver.TCPServer.server_activate(self)
2077
 
    
2078
 
    def enable(self):
2079
 
        self.enabled = True
2080
 
    
2081
 
    def add_pipe(self, parent_pipe, proc):
2082
 
        # Call "handle_ipc" for both data and EOF events
2083
 
        gobject.io_add_watch(
2084
 
            parent_pipe.fileno(),
2085
 
            gobject.IO_IN | gobject.IO_HUP,
2086
 
            functools.partial(self.handle_ipc,
2087
 
                              parent_pipe = parent_pipe,
2088
 
                              proc = proc))
2089
 
    
2090
 
    def handle_ipc(self, source, condition,
2091
 
                   parent_pipe=None,
2092
 
                   proc = None,
2093
 
                   client_object=None):
2094
 
        # error, or the other end of multiprocessing.Pipe has closed
2095
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2096
 
            # Wait for other process to exit
2097
 
            proc.join()
2098
 
            return False
2099
 
        
2100
 
        # Read a request from the child
2101
 
        request = parent_pipe.recv()
2102
 
        command = request[0]
2103
 
        
2104
 
        if command == 'init':
2105
 
            fpr = request[1]
2106
 
            address = request[2]
2107
 
            
2108
 
            for c in self.clients.itervalues():
2109
 
                if c.fingerprint == fpr:
2110
 
                    client = c
2111
 
                    break
2112
 
            else:
2113
 
                logger.info("Client not found for fingerprint: %s, ad"
2114
 
                            "dress: %s", fpr, address)
2115
 
                if self.use_dbus:
2116
 
                    # Emit D-Bus signal
2117
 
                    mandos_dbus_service.ClientNotFound(fpr,
2118
 
                                                       address[0])
2119
 
                parent_pipe.send(False)
2120
 
                return False
2121
 
            
2122
 
            gobject.io_add_watch(
2123
 
                parent_pipe.fileno(),
2124
 
                gobject.IO_IN | gobject.IO_HUP,
2125
 
                functools.partial(self.handle_ipc,
2126
 
                                  parent_pipe = parent_pipe,
2127
 
                                  proc = proc,
2128
 
                                  client_object = client))
2129
 
            parent_pipe.send(True)
2130
 
            # remove the old hook in favor of the new above hook on
2131
 
            # same fileno
2132
 
            return False
2133
 
        if command == 'funcall':
2134
 
            funcname = request[1]
2135
 
            args = request[2]
2136
 
            kwargs = request[3]
2137
 
            
2138
 
            parent_pipe.send(('data', getattr(client_object,
2139
 
                                              funcname)(*args,
2140
 
                                                        **kwargs)))
2141
 
        
2142
 
        if command == 'getattr':
2143
 
            attrname = request[1]
2144
 
            if callable(client_object.__getattribute__(attrname)):
2145
 
                parent_pipe.send(('function', ))
2146
 
            else:
2147
 
                parent_pipe.send((
2148
 
                    'data', client_object.__getattribute__(attrname)))
2149
 
        
2150
 
        if command == 'setattr':
2151
 
            attrname = request[1]
2152
 
            value = request[2]
2153
 
            setattr(client_object, attrname, value)
2154
 
        
2155
 
        return True
2156
 
 
2157
 
 
2158
 
def rfc3339_duration_to_delta(duration):
2159
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2160
 
    
2161
 
    >>> rfc3339_duration_to_delta("P7D")
2162
 
    datetime.timedelta(7)
2163
 
    >>> rfc3339_duration_to_delta("PT60S")
2164
 
    datetime.timedelta(0, 60)
2165
 
    >>> rfc3339_duration_to_delta("PT60M")
2166
 
    datetime.timedelta(0, 3600)
2167
 
    >>> rfc3339_duration_to_delta("PT24H")
2168
 
    datetime.timedelta(1)
2169
 
    >>> rfc3339_duration_to_delta("P1W")
2170
 
    datetime.timedelta(7)
2171
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2172
 
    datetime.timedelta(0, 330)
2173
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2174
 
    datetime.timedelta(1, 200)
2175
 
    """
2176
 
    
2177
 
    # Parsing an RFC 3339 duration with regular expressions is not
2178
 
    # possible - there would have to be multiple places for the same
2179
 
    # values, like seconds.  The current code, while more esoteric, is
2180
 
    # cleaner without depending on a parsing library.  If Python had a
2181
 
    # built-in library for parsing we would use it, but we'd like to
2182
 
    # avoid excessive use of external libraries.
2183
 
    
2184
 
    # New type for defining tokens, syntax, and semantics all-in-one
2185
 
    Token = collections.namedtuple("Token",
2186
 
                                   ("regexp", # To match token; if
2187
 
                                              # "value" is not None,
2188
 
                                              # must have a "group"
2189
 
                                              # containing digits
2190
 
                                    "value",  # datetime.timedelta or
2191
 
                                              # None
2192
 
                                    "followers")) # Tokens valid after
2193
 
                                                  # this token
2194
 
    Token = collections.namedtuple("Token", (
2195
 
        "regexp",  # To match token; if "value" is not None, must have
2196
 
                   # a "group" containing digits
2197
 
        "value",   # datetime.timedelta or None
2198
 
        "followers"))           # Tokens valid after this token
2199
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2200
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2201
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2202
 
    token_second = Token(re.compile(r"(\d+)S"),
2203
 
                         datetime.timedelta(seconds=1),
2204
 
                         frozenset((token_end, )))
2205
 
    token_minute = Token(re.compile(r"(\d+)M"),
2206
 
                         datetime.timedelta(minutes=1),
2207
 
                         frozenset((token_second, token_end)))
2208
 
    token_hour = Token(re.compile(r"(\d+)H"),
2209
 
                       datetime.timedelta(hours=1),
2210
 
                       frozenset((token_minute, token_end)))
2211
 
    token_time = Token(re.compile(r"T"),
2212
 
                       None,
2213
 
                       frozenset((token_hour, token_minute,
2214
 
                                  token_second)))
2215
 
    token_day = Token(re.compile(r"(\d+)D"),
2216
 
                      datetime.timedelta(days=1),
2217
 
                      frozenset((token_time, token_end)))
2218
 
    token_month = Token(re.compile(r"(\d+)M"),
2219
 
                        datetime.timedelta(weeks=4),
2220
 
                        frozenset((token_day, token_end)))
2221
 
    token_year = Token(re.compile(r"(\d+)Y"),
2222
 
                       datetime.timedelta(weeks=52),
2223
 
                       frozenset((token_month, token_end)))
2224
 
    token_week = Token(re.compile(r"(\d+)W"),
2225
 
                       datetime.timedelta(weeks=1),
2226
 
                       frozenset((token_end, )))
2227
 
    token_duration = Token(re.compile(r"P"), None,
2228
 
                           frozenset((token_year, token_month,
2229
 
                                      token_day, token_time,
2230
 
                                      token_week)))
2231
 
    # Define starting values
2232
 
    value = datetime.timedelta() # Value so far
2233
 
    found_token = None
2234
 
    followers = frozenset((token_duration,)) # Following valid tokens
2235
 
    s = duration                # String left to parse
2236
 
    # Loop until end token is found
2237
 
    while found_token is not token_end:
2238
 
        # Search for any currently valid tokens
2239
 
        for token in followers:
2240
 
            match = token.regexp.match(s)
2241
 
            if match is not None:
2242
 
                # Token found
2243
 
                if token.value is not None:
2244
 
                    # Value found, parse digits
2245
 
                    factor = int(match.group(1), 10)
2246
 
                    # Add to value so far
2247
 
                    value += factor * token.value
2248
 
                # Strip token from string
2249
 
                s = token.regexp.sub("", s, 1)
2250
 
                # Go to found token
2251
 
                found_token = token
2252
 
                # Set valid next tokens
2253
 
                followers = found_token.followers
2254
 
                break
2255
 
        else:
2256
 
            # No currently valid tokens were found
2257
 
            raise ValueError("Invalid RFC 3339 duration")
2258
 
    # End token found
2259
 
    return value
 
463
            elif self.server_address[1] is None:
 
464
                self.server_address = (self.server_address[0],
 
465
                                       0)
 
466
            return super(type(self), self).server_bind()
2260
467
 
2261
468
 
2262
469
def string_to_delta(interval):
2263
470
    """Parse a string and return a datetime.timedelta
2264
 
    
 
471
 
2265
472
    >>> string_to_delta('7d')
2266
473
    datetime.timedelta(7)
2267
474
    >>> string_to_delta('60s')
2270
477
    datetime.timedelta(0, 3600)
2271
478
    >>> string_to_delta('24h')
2272
479
    datetime.timedelta(1)
2273
 
    >>> string_to_delta('1w')
 
480
    >>> string_to_delta(u'1w')
2274
481
    datetime.timedelta(7)
2275
 
    >>> string_to_delta('5m 30s')
2276
 
    datetime.timedelta(0, 330)
2277
482
    """
2278
 
    
2279
 
    try:
2280
 
        return rfc3339_duration_to_delta(interval)
2281
 
    except ValueError:
2282
 
        pass
2283
 
    
2284
 
    timevalue = datetime.timedelta(0)
2285
 
    for s in interval.split():
2286
 
        try:
2287
 
            suffix = s[-1]
2288
 
            value = int(s[:-1])
2289
 
            if suffix == "d":
2290
 
                delta = datetime.timedelta(value)
2291
 
            elif suffix == "s":
2292
 
                delta = datetime.timedelta(0, value)
2293
 
            elif suffix == "m":
2294
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2295
 
            elif suffix == "h":
2296
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2297
 
            elif suffix == "w":
2298
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2299
 
            else:
2300
 
                raise ValueError("Unknown suffix {!r}".format(suffix))
2301
 
        except IndexError as e:
2302
 
            raise ValueError(*(e.args))
2303
 
        timevalue += delta
2304
 
    return timevalue
2305
 
 
2306
 
 
2307
 
def daemon(nochdir = False, noclose = False):
 
483
    try:
 
484
        suffix=unicode(interval[-1])
 
485
        value=int(interval[:-1])
 
486
        if suffix == u"d":
 
487
            delta = datetime.timedelta(value)
 
488
        elif suffix == u"s":
 
489
            delta = datetime.timedelta(0, value)
 
490
        elif suffix == u"m":
 
491
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
492
        elif suffix == u"h":
 
493
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
494
        elif suffix == u"w":
 
495
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
496
        else:
 
497
            raise ValueError
 
498
    except (ValueError, IndexError):
 
499
        raise ValueError
 
500
    return delta
 
501
 
 
502
 
 
503
def add_service():
 
504
    """Derived from the Avahi example code"""
 
505
    global group, serviceName, serviceType, servicePort, serviceTXT, \
 
506
           domain, host
 
507
    if group is None:
 
508
        group = dbus.Interface(
 
509
                bus.get_object( avahi.DBUS_NAME,
 
510
                                server.EntryGroupNew()),
 
511
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
512
        group.connect_to_signal('StateChanged',
 
513
                                entry_group_state_changed)
 
514
    logger.debug(u"Adding service '%s' of type '%s' ...",
 
515
                 serviceName, serviceType)
 
516
    
 
517
    group.AddService(
 
518
            serviceInterface,           # interface
 
519
            avahi.PROTO_INET6,          # protocol
 
520
            dbus.UInt32(0),             # flags
 
521
            serviceName, serviceType,
 
522
            domain, host,
 
523
            dbus.UInt16(servicePort),
 
524
            avahi.string_array_to_txt_array(serviceTXT))
 
525
    group.Commit()
 
526
 
 
527
 
 
528
def remove_service():
 
529
    """From the Avahi example code"""
 
530
    global group
 
531
    
 
532
    if not group is None:
 
533
        group.Reset()
 
534
 
 
535
 
 
536
def server_state_changed(state):
 
537
    """Derived from the Avahi example code"""
 
538
    if state == avahi.SERVER_COLLISION:
 
539
        logger.warning(u"Server name collision")
 
540
        remove_service()
 
541
    elif state == avahi.SERVER_RUNNING:
 
542
        add_service()
 
543
 
 
544
 
 
545
def entry_group_state_changed(state, error):
 
546
    """Derived from the Avahi example code"""
 
547
    global serviceName, server, rename_count
 
548
    
 
549
    logger.debug(u"state change: %i", state)
 
550
    
 
551
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
552
        logger.debug(u"Service established.")
 
553
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
554
        
 
555
        rename_count = rename_count - 1
 
556
        if rename_count > 0:
 
557
            name = server.GetAlternativeServiceName(name)
 
558
            logger.warning(u"Service name collision, "
 
559
                           u"changing name to '%s' ...", name)
 
560
            remove_service()
 
561
            add_service()
 
562
            
 
563
        else:
 
564
            logger.error(u"No suitable service name found after %i"
 
565
                         u" retries, exiting.", n_rename)
 
566
            killme(1)
 
567
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
568
        logger.error(u"Error in group state changed %s",
 
569
                     unicode(error))
 
570
        killme(1)
 
571
 
 
572
 
 
573
def if_nametoindex(interface):
 
574
    """Call the C function if_nametoindex()"""
 
575
    try:
 
576
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
577
        return libc.if_nametoindex(interface)
 
578
    except (OSError, AttributeError):
 
579
        if "struct" not in sys.modules:
 
580
            import struct
 
581
        if "fcntl" not in sys.modules:
 
582
            import fcntl
 
583
        SIOCGIFINDEX = 0x8933      # From /usr/include/linux/sockios.h
 
584
        s = socket.socket()
 
585
        ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
586
                            struct.pack("16s16x", interface))
 
587
        s.close()
 
588
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
589
        return interface_index
 
590
 
 
591
 
 
592
def daemon(nochdir, noclose):
2308
593
    """See daemon(3).  Standard BSD Unix function.
2309
 
    
2310
594
    This should really exist as os.daemon, but it doesn't (yet)."""
2311
595
    if os.fork():
2312
596
        sys.exit()
2313
597
    os.setsid()
2314
598
    if not nochdir:
2315
599
        os.chdir("/")
2316
 
    if os.fork():
2317
 
        sys.exit()
2318
600
    if not noclose:
2319
601
        # Close all standard open file descriptors
2320
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
602
        null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
2321
603
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2322
604
            raise OSError(errno.ENODEV,
2323
 
                          "{} not a character device"
2324
 
                          .format(os.devnull))
 
605
                          "/dev/null not a character device")
2325
606
        os.dup2(null, sys.stdin.fileno())
2326
607
        os.dup2(null, sys.stdout.fileno())
2327
608
        os.dup2(null, sys.stderr.fileno())
2329
610
            os.close(null)
2330
611
 
2331
612
 
 
613
def killme(status = 0):
 
614
    logger.debug("Stopping server with exit status %d", status)
 
615
    exitstatus = status
 
616
    if main_loop_started:
 
617
        main_loop.quit()
 
618
    else:
 
619
        sys.exit(status)
 
620
 
 
621
 
2332
622
def main():
2333
 
    
2334
 
    ##################################################################
2335
 
    # Parsing of options, both command line and config file
2336
 
    
2337
 
    parser = argparse.ArgumentParser()
2338
 
    parser.add_argument("-v", "--version", action="version",
2339
 
                        version = "%(prog)s {}".format(version),
2340
 
                        help="show version number and exit")
2341
 
    parser.add_argument("-i", "--interface", metavar="IF",
2342
 
                        help="Bind to interface IF")
2343
 
    parser.add_argument("-a", "--address",
2344
 
                        help="Address to listen for requests on")
2345
 
    parser.add_argument("-p", "--port", type=int,
2346
 
                        help="Port number to receive requests on")
2347
 
    parser.add_argument("--check", action="store_true",
2348
 
                        help="Run self-test")
2349
 
    parser.add_argument("--debug", action="store_true",
2350
 
                        help="Debug mode; run in foreground and log"
2351
 
                        " to terminal", default=None)
2352
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2353
 
                        help="Debug level for stdout output")
2354
 
    parser.add_argument("--priority", help="GnuTLS"
2355
 
                        " priority string (see GnuTLS documentation)")
2356
 
    parser.add_argument("--servicename",
2357
 
                        metavar="NAME", help="Zeroconf service name")
2358
 
    parser.add_argument("--configdir",
2359
 
                        default="/etc/mandos", metavar="DIR",
2360
 
                        help="Directory to search for configuration"
2361
 
                        " files")
2362
 
    parser.add_argument("--no-dbus", action="store_false",
2363
 
                        dest="use_dbus", help="Do not provide D-Bus"
2364
 
                        " system bus interface", default=None)
2365
 
    parser.add_argument("--no-ipv6", action="store_false",
2366
 
                        dest="use_ipv6", help="Do not use IPv6",
2367
 
                        default=None)
2368
 
    parser.add_argument("--no-restore", action="store_false",
2369
 
                        dest="restore", help="Do not restore stored"
2370
 
                        " state", default=None)
2371
 
    parser.add_argument("--socket", type=int,
2372
 
                        help="Specify a file descriptor to a network"
2373
 
                        " socket to use instead of creating one")
2374
 
    parser.add_argument("--statedir", metavar="DIR",
2375
 
                        help="Directory to save/restore state in")
2376
 
    parser.add_argument("--foreground", action="store_true",
2377
 
                        help="Run in foreground", default=None)
2378
 
    parser.add_argument("--no-zeroconf", action="store_false",
2379
 
                        dest="zeroconf", help="Do not use Zeroconf",
2380
 
                        default=None)
2381
 
    
2382
 
    options = parser.parse_args()
 
623
    global exitstatus
 
624
    exitstatus = 0
 
625
    global main_loop_started
 
626
    main_loop_started = False
 
627
    
 
628
    parser = OptionParser()
 
629
    parser.add_option("-i", "--interface", type="string",
 
630
                      default=None, metavar="IF",
 
631
                      help="Bind to interface IF")
 
632
    parser.add_option("-a", "--address", type="string", default=None,
 
633
                      help="Address to listen for requests on")
 
634
    parser.add_option("-p", "--port", type="int", default=None,
 
635
                      help="Port number to receive requests on")
 
636
    parser.add_option("--check", action="store_true", default=False,
 
637
                      help="Run self-test")
 
638
    parser.add_option("--debug", action="store_true", default=False,
 
639
                      help="Debug mode")
 
640
    parser.add_option("--priority", type="string",
 
641
                      default="SECURE256",
 
642
                      help="GnuTLS priority string"
 
643
                      " (see GnuTLS documentation)")
 
644
    parser.add_option("--servicename", type="string",
 
645
                      default="Mandos", help="Zeroconf service name")
 
646
    (options, args) = parser.parse_args()
2383
647
    
2384
648
    if options.check:
2385
649
        import doctest
2386
 
        fail_count, test_count = doctest.testmod()
2387
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2388
 
    
2389
 
    # Default values for config file for server-global settings
2390
 
    server_defaults = { "interface": "",
2391
 
                        "address": "",
2392
 
                        "port": "",
2393
 
                        "debug": "False",
2394
 
                        "priority":
2395
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2396
 
                        ":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2397
 
                        "servicename": "Mandos",
2398
 
                        "use_dbus": "True",
2399
 
                        "use_ipv6": "True",
2400
 
                        "debuglevel": "",
2401
 
                        "restore": "True",
2402
 
                        "socket": "",
2403
 
                        "statedir": "/var/lib/mandos",
2404
 
                        "foreground": "False",
2405
 
                        "zeroconf": "True",
2406
 
                    }
2407
 
    
2408
 
    # Parse config file for server-global settings
2409
 
    server_config = configparser.SafeConfigParser(server_defaults)
2410
 
    del server_defaults
2411
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2412
 
    # Convert the SafeConfigParser object to a dict
2413
 
    server_settings = server_config.defaults()
2414
 
    # Use the appropriate methods on the non-string config options
2415
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2416
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2417
 
                                                           option)
2418
 
    if server_settings["port"]:
2419
 
        server_settings["port"] = server_config.getint("DEFAULT",
2420
 
                                                       "port")
2421
 
    if server_settings["socket"]:
2422
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2423
 
                                                         "socket")
2424
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2425
 
        # over with an opened os.devnull.  But we don't want this to
2426
 
        # happen with a supplied network socket.
2427
 
        if 0 <= server_settings["socket"] <= 2:
2428
 
            server_settings["socket"] = os.dup(server_settings
2429
 
                                               ["socket"])
2430
 
    del server_config
2431
 
    
2432
 
    # Override the settings from the config file with command line
2433
 
    # options, if set.
2434
 
    for option in ("interface", "address", "port", "debug",
2435
 
                   "priority", "servicename", "configdir", "use_dbus",
2436
 
                   "use_ipv6", "debuglevel", "restore", "statedir",
2437
 
                   "socket", "foreground", "zeroconf"):
2438
 
        value = getattr(options, option)
2439
 
        if value is not None:
2440
 
            server_settings[option] = value
2441
 
    del options
2442
 
    # Force all strings to be unicode
2443
 
    for option in server_settings.keys():
2444
 
        if isinstance(server_settings[option], bytes):
2445
 
            server_settings[option] = (server_settings[option]
2446
 
                                       .decode("utf-8"))
2447
 
    # Force all boolean options to be boolean
2448
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2449
 
                   "foreground", "zeroconf"):
2450
 
        server_settings[option] = bool(server_settings[option])
2451
 
    # Debug implies foreground
2452
 
    if server_settings["debug"]:
2453
 
        server_settings["foreground"] = True
2454
 
    # Now we have our good server settings in "server_settings"
2455
 
    
2456
 
    ##################################################################
2457
 
    
2458
 
    if (not server_settings["zeroconf"]
2459
 
        and not (server_settings["port"]
2460
 
                 or server_settings["socket"] != "")):
2461
 
        parser.error("Needs port or socket to work without Zeroconf")
2462
 
    
2463
 
    # For convenience
2464
 
    debug = server_settings["debug"]
2465
 
    debuglevel = server_settings["debuglevel"]
2466
 
    use_dbus = server_settings["use_dbus"]
2467
 
    use_ipv6 = server_settings["use_ipv6"]
2468
 
    stored_state_path = os.path.join(server_settings["statedir"],
2469
 
                                     stored_state_file)
2470
 
    foreground = server_settings["foreground"]
2471
 
    zeroconf = server_settings["zeroconf"]
2472
 
    
2473
 
    if debug:
2474
 
        initlogger(debug, logging.DEBUG)
2475
 
    else:
2476
 
        if not debuglevel:
2477
 
            initlogger(debug)
2478
 
        else:
2479
 
            level = getattr(logging, debuglevel.upper())
2480
 
            initlogger(debug, level)
2481
 
    
2482
 
    if server_settings["servicename"] != "Mandos":
2483
 
        syslogger.setFormatter(
2484
 
            logging.Formatter('Mandos ({}) [%(process)d]:'
2485
 
                              ' %(levelname)s: %(message)s'.format(
2486
 
                                  server_settings["servicename"])))
2487
 
    
2488
 
    # Parse config file with clients
2489
 
    client_config = configparser.SafeConfigParser(Client
2490
 
                                                  .client_defaults)
2491
 
    client_config.read(os.path.join(server_settings["configdir"],
2492
 
                                    "clients.conf"))
2493
 
    
2494
 
    global mandos_dbus_service
2495
 
    mandos_dbus_service = None
2496
 
    
2497
 
    socketfd = None
2498
 
    if server_settings["socket"] != "":
2499
 
        socketfd = server_settings["socket"]
2500
 
    tcp_server = MandosServer(
2501
 
        (server_settings["address"], server_settings["port"]),
2502
 
        ClientHandler,
2503
 
        interface=(server_settings["interface"] or None),
2504
 
        use_ipv6=use_ipv6,
2505
 
        gnutls_priority=server_settings["priority"],
2506
 
        use_dbus=use_dbus,
2507
 
        socketfd=socketfd)
2508
 
    if not foreground:
2509
 
        pidfilename = "/run/mandos.pid"
2510
 
        if not os.path.isdir("/run/."):
2511
 
            pidfilename = "/var/run/mandos.pid"
2512
 
        pidfile = None
2513
 
        try:
2514
 
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2515
 
        except IOError as e:
2516
 
            logger.error("Could not open file %r", pidfilename,
2517
 
                         exc_info=e)
2518
 
    
2519
 
    for name in ("_mandos", "mandos", "nobody"):
2520
 
        try:
2521
 
            uid = pwd.getpwnam(name).pw_uid
2522
 
            gid = pwd.getpwnam(name).pw_gid
2523
 
            break
2524
 
        except KeyError:
2525
 
            continue
2526
 
    else:
2527
 
        uid = 65534
2528
 
        gid = 65534
2529
 
    try:
2530
 
        os.setgid(gid)
2531
 
        os.setuid(uid)
2532
 
    except OSError as error:
2533
 
        if error.errno != errno.EPERM:
2534
 
            raise
2535
 
    
2536
 
    if debug:
2537
 
        # Enable all possible GnuTLS debugging
2538
 
        
2539
 
        # "Use a log level over 10 to enable all debugging options."
2540
 
        # - GnuTLS manual
2541
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2542
 
        
2543
 
        @gnutls.library.types.gnutls_log_func
2544
 
        def debug_gnutls(level, string):
2545
 
            logger.debug("GnuTLS: %s", string[:-1])
2546
 
        
2547
 
        gnutls.library.functions.gnutls_global_set_log_function(
2548
 
            debug_gnutls)
2549
 
        
2550
 
        # Redirect stdin so all checkers get /dev/null
2551
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2552
 
        os.dup2(null, sys.stdin.fileno())
2553
 
        if null > 2:
2554
 
            os.close(null)
2555
 
    
2556
 
    # Need to fork before connecting to D-Bus
2557
 
    if not foreground:
2558
 
        # Close all input and output, do double fork, etc.
2559
 
        daemon()
2560
 
    
2561
 
    # multiprocessing will use threads, so before we use gobject we
2562
 
    # need to inform gobject that threads will be used.
2563
 
    gobject.threads_init()
 
650
        doctest.testmod()
 
651
        sys.exit()
 
652
    
 
653
    # Parse config file
 
654
    defaults = { "timeout": "1h",
 
655
                 "interval": "5m",
 
656
                 "checker": "fping -q -- %%(fqdn)s",
 
657
                 }
 
658
    client_config = ConfigParser.SafeConfigParser(defaults)
 
659
    #client_config.readfp(open("global.conf"), "global.conf")
 
660
    client_config.read("mandos-clients.conf")
 
661
    
 
662
    global serviceName
 
663
    serviceName = options.servicename;
2564
664
    
2565
665
    global main_loop
 
666
    global bus
 
667
    global server
2566
668
    # From the Avahi example code
2567
 
    DBusGMainLoop(set_as_default=True)
 
669
    DBusGMainLoop(set_as_default=True )
2568
670
    main_loop = gobject.MainLoop()
2569
671
    bus = dbus.SystemBus()
 
672
    server = dbus.Interface(
 
673
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
674
            avahi.DBUS_INTERFACE_SERVER )
2570
675
    # End of Avahi example code
2571
 
    if use_dbus:
2572
 
        try:
2573
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2574
 
                                            bus,
2575
 
                                            do_not_queue=True)
2576
 
            old_bus_name = dbus.service.BusName(
2577
 
                "se.bsnet.fukt.Mandos", bus,
2578
 
                do_not_queue=True)
2579
 
        except dbus.exceptions.DBusException as e:
2580
 
            logger.error("Disabling D-Bus:", exc_info=e)
2581
 
            use_dbus = False
2582
 
            server_settings["use_dbus"] = False
2583
 
            tcp_server.use_dbus = False
2584
 
    if zeroconf:
2585
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2586
 
        service = AvahiServiceToSyslog(
2587
 
            name = server_settings["servicename"],
2588
 
            servicetype = "_mandos._tcp",
2589
 
            protocol = protocol,
2590
 
            bus = bus)
2591
 
        if server_settings["interface"]:
2592
 
            service.interface = if_nametoindex(
2593
 
                server_settings["interface"].encode("utf-8"))
2594
 
    
2595
 
    global multiprocessing_manager
2596
 
    multiprocessing_manager = multiprocessing.Manager()
2597
 
    
2598
 
    client_class = Client
2599
 
    if use_dbus:
2600
 
        client_class = functools.partial(ClientDBus, bus = bus)
2601
 
    
2602
 
    client_settings = Client.config_parser(client_config)
2603
 
    old_client_settings = {}
2604
 
    clients_data = {}
2605
 
    
2606
 
    # This is used to redirect stdout and stderr for checker processes
2607
 
    global wnull
2608
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2609
 
    # Only used if server is running in foreground but not in debug
2610
 
    # mode
2611
 
    if debug or not foreground:
2612
 
        wnull.close()
2613
 
    
2614
 
    # Get client data and settings from last running state.
2615
 
    if server_settings["restore"]:
2616
 
        try:
2617
 
            with open(stored_state_path, "rb") as stored_state:
2618
 
                clients_data, old_client_settings = pickle.load(
2619
 
                    stored_state)
2620
 
            os.remove(stored_state_path)
2621
 
        except IOError as e:
2622
 
            if e.errno == errno.ENOENT:
2623
 
                logger.warning("Could not load persistent state:"
2624
 
                               " {}".format(os.strerror(e.errno)))
2625
 
            else:
2626
 
                logger.critical("Could not load persistent state:",
2627
 
                                exc_info=e)
2628
 
                raise
2629
 
        except EOFError as e:
2630
 
            logger.warning("Could not load persistent state: "
2631
 
                           "EOFError:",
2632
 
                           exc_info=e)
2633
 
    
2634
 
    with PGPEngine() as pgp:
2635
 
        for client_name, client in clients_data.items():
2636
 
            # Skip removed clients
2637
 
            if client_name not in client_settings:
2638
 
                continue
2639
 
            
2640
 
            # Decide which value to use after restoring saved state.
2641
 
            # We have three different values: Old config file,
2642
 
            # new config file, and saved state.
2643
 
            # New config value takes precedence if it differs from old
2644
 
            # config value, otherwise use saved state.
2645
 
            for name, value in client_settings[client_name].items():
2646
 
                try:
2647
 
                    # For each value in new config, check if it
2648
 
                    # differs from the old config value (Except for
2649
 
                    # the "secret" attribute)
2650
 
                    if (name != "secret"
2651
 
                        and (value !=
2652
 
                             old_client_settings[client_name][name])):
2653
 
                        client[name] = value
2654
 
                except KeyError:
2655
 
                    pass
2656
 
            
2657
 
            # Clients who has passed its expire date can still be
2658
 
            # enabled if its last checker was successful.  Clients
2659
 
            # whose checker succeeded before we stored its state is
2660
 
            # assumed to have successfully run all checkers during
2661
 
            # downtime.
2662
 
            if client["enabled"]:
2663
 
                if datetime.datetime.utcnow() >= client["expires"]:
2664
 
                    if not client["last_checked_ok"]:
2665
 
                        logger.warning(
2666
 
                            "disabling client {} - Client never "
2667
 
                            "performed a successful checker".format(
2668
 
                                client_name))
2669
 
                        client["enabled"] = False
2670
 
                    elif client["last_checker_status"] != 0:
2671
 
                        logger.warning(
2672
 
                            "disabling client {} - Client last"
2673
 
                            " checker failed with error code"
2674
 
                            " {}".format(
2675
 
                                client_name,
2676
 
                                client["last_checker_status"]))
2677
 
                        client["enabled"] = False
2678
 
                    else:
2679
 
                        client["expires"] = (
2680
 
                            datetime.datetime.utcnow()
2681
 
                            + client["timeout"])
2682
 
                        logger.debug("Last checker succeeded,"
2683
 
                                     " keeping {} enabled".format(
2684
 
                                         client_name))
2685
 
            try:
2686
 
                client["secret"] = pgp.decrypt(
2687
 
                    client["encrypted_secret"],
2688
 
                    client_settings[client_name]["secret"])
2689
 
            except PGPError:
2690
 
                # If decryption fails, we use secret from new settings
2691
 
                logger.debug("Failed to decrypt {} old secret".format(
2692
 
                    client_name))
2693
 
                client["secret"] = (client_settings[client_name]
2694
 
                                    ["secret"])
2695
 
    
2696
 
    # Add/remove clients based on new changes made to config
2697
 
    for client_name in (set(old_client_settings)
2698
 
                        - set(client_settings)):
2699
 
        del clients_data[client_name]
2700
 
    for client_name in (set(client_settings)
2701
 
                        - set(old_client_settings)):
2702
 
        clients_data[client_name] = client_settings[client_name]
2703
 
    
2704
 
    # Create all client objects
2705
 
    for client_name, client in clients_data.items():
2706
 
        tcp_server.clients[client_name] = client_class(
2707
 
            name = client_name,
2708
 
            settings = client,
2709
 
            server_settings = server_settings)
2710
 
    
2711
 
    if not tcp_server.clients:
2712
 
        logger.warning("No clients defined")
2713
 
    
2714
 
    if not foreground:
2715
 
        if pidfile is not None:
2716
 
            pid = os.getpid()
2717
 
            try:
2718
 
                with pidfile:
2719
 
                    print(pid, file=pidfile)
2720
 
            except IOError:
2721
 
                logger.error("Could not write to file %r with PID %d",
2722
 
                             pidfilename, pid)
2723
 
        del pidfile
2724
 
        del pidfilename
2725
 
    
2726
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2727
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2728
 
    
2729
 
    if use_dbus:
2730
 
        
2731
 
        @alternate_dbus_interfaces(
2732
 
            { "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2733
 
        class MandosDBusService(DBusObjectWithProperties):
2734
 
            """A D-Bus proxy object"""
2735
 
            
2736
 
            def __init__(self):
2737
 
                dbus.service.Object.__init__(self, bus, "/")
2738
 
            
2739
 
            _interface = "se.recompile.Mandos"
2740
 
            
2741
 
            @dbus_interface_annotations(_interface)
2742
 
            def _foo(self):
2743
 
                return {
2744
 
                    "org.freedesktop.DBus.Property.EmitsChangedSignal":
2745
 
                    "false" }
2746
 
            
2747
 
            @dbus.service.signal(_interface, signature="o")
2748
 
            def ClientAdded(self, objpath):
2749
 
                "D-Bus signal"
2750
 
                pass
2751
 
            
2752
 
            @dbus.service.signal(_interface, signature="ss")
2753
 
            def ClientNotFound(self, fingerprint, address):
2754
 
                "D-Bus signal"
2755
 
                pass
2756
 
            
2757
 
            @dbus.service.signal(_interface, signature="os")
2758
 
            def ClientRemoved(self, objpath, name):
2759
 
                "D-Bus signal"
2760
 
                pass
2761
 
            
2762
 
            @dbus.service.method(_interface, out_signature="ao")
2763
 
            def GetAllClients(self):
2764
 
                "D-Bus method"
2765
 
                return dbus.Array(c.dbus_object_path for c in
2766
 
                                  tcp_server.clients.itervalues())
2767
 
            
2768
 
            @dbus.service.method(_interface,
2769
 
                                 out_signature="a{oa{sv}}")
2770
 
            def GetAllClientsWithProperties(self):
2771
 
                "D-Bus method"
2772
 
                return dbus.Dictionary(
2773
 
                    { c.dbus_object_path: c.GetAll("")
2774
 
                      for c in tcp_server.clients.itervalues() },
2775
 
                    signature="oa{sv}")
2776
 
            
2777
 
            @dbus.service.method(_interface, in_signature="o")
2778
 
            def RemoveClient(self, object_path):
2779
 
                "D-Bus method"
2780
 
                for c in tcp_server.clients.itervalues():
2781
 
                    if c.dbus_object_path == object_path:
2782
 
                        del tcp_server.clients[c.name]
2783
 
                        c.remove_from_connection()
2784
 
                        # Don't signal anything except ClientRemoved
2785
 
                        c.disable(quiet=True)
2786
 
                        # Emit D-Bus signal
2787
 
                        self.ClientRemoved(object_path, c.name)
2788
 
                        return
2789
 
                raise KeyError(object_path)
2790
 
            
2791
 
            del _interface
2792
 
        
2793
 
        mandos_dbus_service = MandosDBusService()
 
676
    
 
677
    debug = options.debug
 
678
    
 
679
    if debug:
 
680
        console = logging.StreamHandler()
 
681
        # console.setLevel(logging.DEBUG)
 
682
        console.setFormatter(logging.Formatter\
 
683
                             ('%(levelname)s: %(message)s'))
 
684
        logger.addHandler(console)
 
685
        del console
 
686
    
 
687
    clients = Set()
 
688
    def remove_from_clients(client):
 
689
        clients.remove(client)
 
690
        if not clients:
 
691
            logger.debug(u"No clients left, exiting")
 
692
            killme()
 
693
    
 
694
    clients.update(Set(Client(name=section,
 
695
                              stop_hook = remove_from_clients,
 
696
                              **(dict(client_config\
 
697
                                      .items(section))))
 
698
                       for section in client_config.sections()))
 
699
    
 
700
    if not debug:
 
701
        daemon(False, False)
2794
702
    
2795
703
    def cleanup():
2796
704
        "Cleanup function; run on exit"
2797
 
        if zeroconf:
2798
 
            service.cleanup()
2799
 
        
2800
 
        multiprocessing.active_children()
2801
 
        wnull.close()
2802
 
        if not (tcp_server.clients or client_settings):
2803
 
            return
2804
 
        
2805
 
        # Store client before exiting. Secrets are encrypted with key
2806
 
        # based on what config file has. If config file is
2807
 
        # removed/edited, old secret will thus be unrecovable.
2808
 
        clients = {}
2809
 
        with PGPEngine() as pgp:
2810
 
            for client in tcp_server.clients.itervalues():
2811
 
                key = client_settings[client.name]["secret"]
2812
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2813
 
                                                      key)
2814
 
                client_dict = {}
2815
 
                
2816
 
                # A list of attributes that can not be pickled
2817
 
                # + secret.
2818
 
                exclude = { "bus", "changedstate", "secret",
2819
 
                            "checker", "server_settings" }
2820
 
                for name, typ in inspect.getmembers(dbus.service
2821
 
                                                    .Object):
2822
 
                    exclude.add(name)
2823
 
                
2824
 
                client_dict["encrypted_secret"] = (client
2825
 
                                                   .encrypted_secret)
2826
 
                for attr in client.client_structure:
2827
 
                    if attr not in exclude:
2828
 
                        client_dict[attr] = getattr(client, attr)
2829
 
                
2830
 
                clients[client.name] = client_dict
2831
 
                del client_settings[client.name]["secret"]
2832
 
        
2833
 
        try:
2834
 
            with tempfile.NamedTemporaryFile(
2835
 
                    mode='wb',
2836
 
                    suffix=".pickle",
2837
 
                    prefix='clients-',
2838
 
                    dir=os.path.dirname(stored_state_path),
2839
 
                    delete=False) as stored_state:
2840
 
                pickle.dump((clients, client_settings), stored_state)
2841
 
                tempname = stored_state.name
2842
 
            os.rename(tempname, stored_state_path)
2843
 
        except (IOError, OSError) as e:
2844
 
            if not debug:
2845
 
                try:
2846
 
                    os.remove(tempname)
2847
 
                except NameError:
2848
 
                    pass
2849
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2850
 
                logger.warning("Could not save persistent state: {}"
2851
 
                               .format(os.strerror(e.errno)))
2852
 
            else:
2853
 
                logger.warning("Could not save persistent state:",
2854
 
                               exc_info=e)
2855
 
                raise
2856
 
        
2857
 
        # Delete all clients, and settings from config
2858
 
        while tcp_server.clients:
2859
 
            name, client = tcp_server.clients.popitem()
2860
 
            if use_dbus:
2861
 
                client.remove_from_connection()
2862
 
            # Don't signal anything except ClientRemoved
2863
 
            client.disable(quiet=True)
2864
 
            if use_dbus:
2865
 
                # Emit D-Bus signal
2866
 
                mandos_dbus_service.ClientRemoved(
2867
 
                    client.dbus_object_path, client.name)
2868
 
        client_settings.clear()
 
705
        global group
 
706
        # From the Avahi example code
 
707
        if not group is None:
 
708
            group.Free()
 
709
            group = None
 
710
        # End of Avahi example code
 
711
        
 
712
        while clients:
 
713
            client = clients.pop()
 
714
            client.stop_hook = None
 
715
            client.stop()
2869
716
    
2870
717
    atexit.register(cleanup)
2871
718
    
2872
 
    for client in tcp_server.clients.itervalues():
2873
 
        if use_dbus:
2874
 
            # Emit D-Bus signal
2875
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2876
 
        # Need to initiate checking of clients
2877
 
        if client.enabled:
2878
 
            client.init_checker()
2879
 
    
2880
 
    tcp_server.enable()
2881
 
    tcp_server.server_activate()
2882
 
    
2883
 
    # Find out what port we got
2884
 
    if zeroconf:
2885
 
        service.port = tcp_server.socket.getsockname()[1]
2886
 
    if use_ipv6:
2887
 
        logger.info("Now listening on address %r, port %d,"
2888
 
                    " flowinfo %d, scope_id %d",
2889
 
                    *tcp_server.socket.getsockname())
2890
 
    else:                       # IPv4
2891
 
        logger.info("Now listening on address %r, port %d",
2892
 
                    *tcp_server.socket.getsockname())
2893
 
    
2894
 
    #service.interface = tcp_server.socket.getsockname()[3]
2895
 
    
2896
 
    try:
2897
 
        if zeroconf:
2898
 
            # From the Avahi example code
2899
 
            try:
2900
 
                service.activate()
2901
 
            except dbus.exceptions.DBusException as error:
2902
 
                logger.critical("D-Bus Exception", exc_info=error)
2903
 
                cleanup()
2904
 
                sys.exit(1)
2905
 
            # End of Avahi example code
2906
 
        
2907
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2908
 
                             lambda *args, **kwargs:
2909
 
                             (tcp_server.handle_request
2910
 
                              (*args[2:], **kwargs) or True))
2911
 
        
 
719
    if not debug:
 
720
        signal.signal(signal.SIGINT, signal.SIG_IGN)
 
721
    signal.signal(signal.SIGHUP, lambda signum, frame: killme())
 
722
    signal.signal(signal.SIGTERM, lambda signum, frame: killme())
 
723
    
 
724
    for client in clients:
 
725
        client.start()
 
726
    
 
727
    tcp_server = IPv6_TCPServer((options.address, options.port),
 
728
                                tcp_handler,
 
729
                                options=options,
 
730
                                clients=clients)
 
731
    # Find out what random port we got
 
732
    global servicePort
 
733
    servicePort = tcp_server.socket.getsockname()[1]
 
734
    logger.debug(u"Now listening on port %d", servicePort)
 
735
    
 
736
    if options.interface is not None:
 
737
        global serviceInterface
 
738
        serviceInterface = if_nametoindex(options.interface)
 
739
    
 
740
    # From the Avahi example code
 
741
    server.connect_to_signal("StateChanged", server_state_changed)
 
742
    try:
 
743
        server_state_changed(server.GetState())
 
744
    except dbus.exceptions.DBusException, error:
 
745
        logger.critical(u"DBusException: %s", error)
 
746
        killme(1)
 
747
    # End of Avahi example code
 
748
    
 
749
    gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
 
750
                         lambda *args, **kwargs:
 
751
                         tcp_server.handle_request(*args[2:],
 
752
                                                   **kwargs) or True)
 
753
    try:
2912
754
        logger.debug("Starting main loop")
 
755
        main_loop_started = True
2913
756
        main_loop.run()
2914
 
    except AvahiError as error:
2915
 
        logger.critical("Avahi Error", exc_info=error)
2916
 
        cleanup()
2917
 
        sys.exit(1)
2918
757
    except KeyboardInterrupt:
2919
758
        if debug:
2920
 
            print("", file=sys.stderr)
2921
 
        logger.debug("Server received KeyboardInterrupt")
2922
 
    logger.debug("Server exiting")
2923
 
    # Must run before the D-Bus bus name gets deregistered
2924
 
    cleanup()
2925
 
 
 
759
            print
 
760
    
 
761
    sys.exit(exitstatus)
2926
762
 
2927
763
if __name__ == '__main__':
2928
764
    main()