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  • Committer: Björn Påhlsson
  • Date: 2008-07-30 02:11:33 UTC
  • mto: (237.7.1 mandos) (24.1.154 mandos)
  • mto: This revision was merged to the branch mainline in revision 30.
  • Revision ID: belorn@braxen-20080730021133-q341llq93r328q5b
Added optional parameters certdir, certkey and certfile that can be iven at start in the command line.

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#!/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
58
 
82
59
import dbus
83
 
import dbus.service
84
 
try:
85
 
    import gobject
86
 
except ImportError:
87
 
    from gi.repository import GObject as gobject
 
60
import gobject
88
61
import avahi
89
62
from dbus.mainloop.glib import DBusGMainLoop
90
63
import ctypes
91
 
import ctypes.util
92
 
import xml.dom.minidom
93
 
import inspect
94
 
 
95
 
try:
96
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
97
 
except AttributeError:
98
 
    try:
99
 
        from IN import SO_BINDTODEVICE
100
 
    except ImportError:
101
 
        SO_BINDTODEVICE = None
102
 
 
103
 
if sys.version_info.major == 2:
104
 
    str = unicode
105
 
 
106
 
version = "1.6.9"
107
 
stored_state_file = "clients.pickle"
108
 
 
109
 
logger = logging.getLogger()
110
 
syslogger = None
111
 
 
112
 
try:
113
 
    if_nametoindex = ctypes.cdll.LoadLibrary(
114
 
        ctypes.util.find_library("c")).if_nametoindex
115
 
except (OSError, AttributeError):
116
 
    
117
 
    def if_nametoindex(interface):
118
 
        "Get an interface index the hard way, i.e. using fcntl()"
119
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
120
 
        with contextlib.closing(socket.socket()) as s:
121
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
122
 
                                struct.pack(b"16s16x", interface))
123
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
124
 
        return interface_index
125
 
 
126
 
 
127
 
def initlogger(debug, level=logging.WARNING):
128
 
    """init logger and add loglevel"""
129
 
    
130
 
    global syslogger
131
 
    syslogger = (logging.handlers.SysLogHandler(
132
 
        facility = logging.handlers.SysLogHandler.LOG_DAEMON,
133
 
        address = "/dev/log"))
134
 
    syslogger.setFormatter(logging.Formatter
135
 
                           ('Mandos [%(process)d]: %(levelname)s:'
136
 
                            ' %(message)s'))
137
 
    logger.addHandler(syslogger)
138
 
    
139
 
    if debug:
140
 
        console = logging.StreamHandler()
141
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
142
 
                                               ' [%(process)d]:'
143
 
                                               ' %(levelname)s:'
144
 
                                               ' %(message)s'))
145
 
        logger.addHandler(console)
146
 
    logger.setLevel(level)
147
 
 
148
 
 
149
 
class PGPError(Exception):
150
 
    """Exception if encryption/decryption fails"""
151
 
    pass
152
 
 
153
 
 
154
 
class PGPEngine(object):
155
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
156
 
    
157
 
    def __init__(self):
158
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
159
 
        self.gnupgargs = ['--batch',
160
 
                          '--home', self.tempdir,
161
 
                          '--force-mdc',
162
 
                          '--quiet',
163
 
                          '--no-use-agent']
164
 
    
165
 
    def __enter__(self):
166
 
        return self
167
 
    
168
 
    def __exit__(self, exc_type, exc_value, traceback):
169
 
        self._cleanup()
170
 
        return False
171
 
    
172
 
    def __del__(self):
173
 
        self._cleanup()
174
 
    
175
 
    def _cleanup(self):
176
 
        if self.tempdir is not None:
177
 
            # Delete contents of tempdir
178
 
            for root, dirs, files in os.walk(self.tempdir,
179
 
                                             topdown = False):
180
 
                for filename in files:
181
 
                    os.remove(os.path.join(root, filename))
182
 
                for dirname in dirs:
183
 
                    os.rmdir(os.path.join(root, dirname))
184
 
            # Remove tempdir
185
 
            os.rmdir(self.tempdir)
186
 
            self.tempdir = None
187
 
    
188
 
    def password_encode(self, password):
189
 
        # Passphrase can not be empty and can not contain newlines or
190
 
        # NUL bytes.  So we prefix it and hex encode it.
191
 
        encoded = b"mandos" + binascii.hexlify(password)
192
 
        if len(encoded) > 2048:
193
 
            # GnuPG can't handle long passwords, so encode differently
194
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
195
 
                       .replace(b"\n", b"\\n")
196
 
                       .replace(b"\0", b"\\x00"))
197
 
        return encoded
198
 
    
199
 
    def encrypt(self, data, password):
200
 
        passphrase = self.password_encode(password)
201
 
        with tempfile.NamedTemporaryFile(
202
 
                dir=self.tempdir) as passfile:
203
 
            passfile.write(passphrase)
204
 
            passfile.flush()
205
 
            proc = subprocess.Popen(['gpg', '--symmetric',
206
 
                                     '--passphrase-file',
207
 
                                     passfile.name]
208
 
                                    + self.gnupgargs,
209
 
                                    stdin = subprocess.PIPE,
210
 
                                    stdout = subprocess.PIPE,
211
 
                                    stderr = subprocess.PIPE)
212
 
            ciphertext, err = proc.communicate(input = data)
213
 
        if proc.returncode != 0:
214
 
            raise PGPError(err)
215
 
        return ciphertext
216
 
    
217
 
    def decrypt(self, data, password):
218
 
        passphrase = self.password_encode(password)
219
 
        with tempfile.NamedTemporaryFile(
220
 
                dir = self.tempdir) as passfile:
221
 
            passfile.write(passphrase)
222
 
            passfile.flush()
223
 
            proc = subprocess.Popen(['gpg', '--decrypt',
224
 
                                     '--passphrase-file',
225
 
                                     passfile.name]
226
 
                                    + self.gnupgargs,
227
 
                                    stdin = subprocess.PIPE,
228
 
                                    stdout = subprocess.PIPE,
229
 
                                    stderr = subprocess.PIPE)
230
 
            decrypted_plaintext, err = proc.communicate(input = data)
231
 
        if proc.returncode != 0:
232
 
            raise PGPError(err)
233
 
        return decrypted_plaintext
234
 
 
235
 
 
236
 
class AvahiError(Exception):
237
 
    def __init__(self, value, *args, **kwargs):
238
 
        self.value = value
239
 
        return super(AvahiError, self).__init__(value, *args,
240
 
                                                **kwargs)
241
 
 
242
 
 
243
 
class AvahiServiceError(AvahiError):
244
 
    pass
245
 
 
246
 
 
247
 
class AvahiGroupError(AvahiError):
248
 
    pass
249
 
 
250
 
 
251
 
class AvahiService(object):
252
 
    """An Avahi (Zeroconf) service.
253
 
    
254
 
    Attributes:
255
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
256
 
               Used to optionally bind to the specified interface.
257
 
    name: string; Example: 'Mandos'
258
 
    type: string; Example: '_mandos._tcp'.
259
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
260
 
    port: integer; what port to announce
261
 
    TXT: list of strings; TXT record for the service
262
 
    domain: string; Domain to publish on, default to .local if empty.
263
 
    host: string; Host to publish records for, default is localhost
264
 
    max_renames: integer; maximum number of renames
265
 
    rename_count: integer; counter so we only rename after collisions
266
 
                  a sensible number of times
267
 
    group: D-Bus Entry Group
268
 
    server: D-Bus Server
269
 
    bus: dbus.SystemBus()
270
 
    """
271
 
    
272
 
    def __init__(self,
273
 
                 interface = avahi.IF_UNSPEC,
274
 
                 name = None,
275
 
                 servicetype = None,
276
 
                 port = None,
277
 
                 TXT = None,
278
 
                 domain = "",
279
 
                 host = "",
280
 
                 max_renames = 32768,
281
 
                 protocol = avahi.PROTO_UNSPEC,
282
 
                 bus = None):
283
 
        self.interface = interface
284
 
        self.name = name
285
 
        self.type = servicetype
286
 
        self.port = port
287
 
        self.TXT = TXT if TXT is not None else []
288
 
        self.domain = domain
289
 
        self.host = host
290
 
        self.rename_count = 0
291
 
        self.max_renames = max_renames
292
 
        self.protocol = protocol
293
 
        self.group = None       # our entry group
294
 
        self.server = None
295
 
        self.bus = bus
296
 
        self.entry_group_state_changed_match = None
297
 
    
298
 
    def rename(self, remove=True):
299
 
        """Derived from the Avahi example code"""
300
 
        if self.rename_count >= self.max_renames:
301
 
            logger.critical("No suitable Zeroconf service name found"
302
 
                            " after %i retries, exiting.",
303
 
                            self.rename_count)
304
 
            raise AvahiServiceError("Too many renames")
305
 
        self.name = str(
306
 
            self.server.GetAlternativeServiceName(self.name))
307
 
        self.rename_count += 1
308
 
        logger.info("Changing Zeroconf service name to %r ...",
309
 
                    self.name)
310
 
        if remove:
311
 
            self.remove()
312
 
        try:
313
 
            self.add()
314
 
        except dbus.exceptions.DBusException as error:
315
 
            if (error.get_dbus_name()
316
 
                == "org.freedesktop.Avahi.CollisionError"):
317
 
                logger.info("Local Zeroconf service name collision.")
318
 
                return self.rename(remove=False)
319
 
            else:
320
 
                logger.critical("D-Bus Exception", exc_info=error)
321
 
                self.cleanup()
322
 
                os._exit(1)
323
 
    
324
 
    def remove(self):
325
 
        """Derived from the Avahi example code"""
326
 
        if self.entry_group_state_changed_match is not None:
327
 
            self.entry_group_state_changed_match.remove()
328
 
            self.entry_group_state_changed_match = None
329
 
        if self.group is not None:
330
 
            self.group.Reset()
331
 
    
332
 
    def add(self):
333
 
        """Derived from the Avahi example code"""
334
 
        self.remove()
335
 
        if self.group is None:
336
 
            self.group = dbus.Interface(
337
 
                self.bus.get_object(avahi.DBUS_NAME,
338
 
                                    self.server.EntryGroupNew()),
339
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
340
 
        self.entry_group_state_changed_match = (
341
 
            self.group.connect_to_signal(
342
 
                'StateChanged', self.entry_group_state_changed))
343
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
344
 
                     self.name, self.type)
345
 
        self.group.AddService(
346
 
            self.interface,
347
 
            self.protocol,
348
 
            dbus.UInt32(0),     # flags
349
 
            self.name, self.type,
350
 
            self.domain, self.host,
351
 
            dbus.UInt16(self.port),
352
 
            avahi.string_array_to_txt_array(self.TXT))
353
 
        self.group.Commit()
354
 
    
355
 
    def entry_group_state_changed(self, state, error):
356
 
        """Derived from the Avahi example code"""
357
 
        logger.debug("Avahi entry group state change: %i", state)
358
 
        
359
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
360
 
            logger.debug("Zeroconf service established.")
361
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
362
 
            logger.info("Zeroconf service name collision.")
363
 
            self.rename()
364
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
365
 
            logger.critical("Avahi: Error in group state changed %s",
366
 
                            str(error))
367
 
            raise AvahiGroupError("State changed: {!s}".format(error))
368
 
    
369
 
    def cleanup(self):
370
 
        """Derived from the Avahi example code"""
371
 
        if self.group is not None:
372
 
            try:
373
 
                self.group.Free()
374
 
            except (dbus.exceptions.UnknownMethodException,
375
 
                    dbus.exceptions.DBusException):
376
 
                pass
377
 
            self.group = None
378
 
        self.remove()
379
 
    
380
 
    def server_state_changed(self, state, error=None):
381
 
        """Derived from the Avahi example code"""
382
 
        logger.debug("Avahi server state change: %i", state)
383
 
        bad_states = {
384
 
            avahi.SERVER_INVALID: "Zeroconf server invalid",
385
 
            avahi.SERVER_REGISTERING: None,
386
 
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
387
 
            avahi.SERVER_FAILURE: "Zeroconf server failure",
388
 
        }
389
 
        if state in bad_states:
390
 
            if bad_states[state] is not None:
391
 
                if error is None:
392
 
                    logger.error(bad_states[state])
393
 
                else:
394
 
                    logger.error(bad_states[state] + ": %r", error)
395
 
            self.cleanup()
396
 
        elif state == avahi.SERVER_RUNNING:
397
 
            self.add()
398
 
        else:
399
 
            if error is None:
400
 
                logger.debug("Unknown state: %r", state)
401
 
            else:
402
 
                logger.debug("Unknown state: %r: %r", state, error)
403
 
    
404
 
    def activate(self):
405
 
        """Derived from the Avahi example code"""
406
 
        if self.server is None:
407
 
            self.server = dbus.Interface(
408
 
                self.bus.get_object(avahi.DBUS_NAME,
409
 
                                    avahi.DBUS_PATH_SERVER,
410
 
                                    follow_name_owner_changes=True),
411
 
                avahi.DBUS_INTERFACE_SERVER)
412
 
        self.server.connect_to_signal("StateChanged",
413
 
                                      self.server_state_changed)
414
 
        self.server_state_changed(self.server.GetState())
415
 
 
416
 
 
417
 
class AvahiServiceToSyslog(AvahiService):
418
 
    def rename(self, *args, **kwargs):
419
 
        """Add the new name to the syslog messages"""
420
 
        ret = AvahiService.rename(self, *args, **kwargs)
421
 
        syslogger.setFormatter(logging.Formatter(
422
 
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
423
 
            .format(self.name)))
424
 
        return ret
425
 
 
426
 
def subprocess_call_pipe(connection, # : multiprocessing.Connection
427
 
                         *args, **kwargs):
428
 
    """This function is meant to be called by multiprocessing.Process
429
 
    
430
 
    This function runs a synchronous subprocess.call(), and writes the
431
 
    resulting return code on the provided multiprocessing.Connection.
432
 
    """
433
 
    connection.send(subprocess.call(*args, **kwargs))
434
 
    connection.close()
 
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
 
100
 
435
101
 
436
102
class Client(object):
437
103
    """A representation of a client host served by this server.
438
 
    
439
104
    Attributes:
440
 
    approved:   bool(); 'None' if not yet approved/disapproved
441
 
    approval_delay: datetime.timedelta(); Time to wait for approval
442
 
    approval_duration: datetime.timedelta(); Duration of one approval
443
 
    checker:    subprocess.Popen(); a running checker process used
444
 
                                    to see if the client lives.
445
 
                                    'None' if no process is running.
446
 
    checker_callback_tag: a gobject event source tag, or None
447
 
    checker_command: string; External command which is run to check
448
 
                     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
449
124
                     runtime with vars(self) as dict, so that for
450
125
                     instance %(name)s can be used in the command.
451
 
    checker_initiator_tag: a gobject event source tag, or None
452
 
    created:    datetime.datetime(); (UTC) object creation
453
 
    client_structure: Object describing what attributes a client has
454
 
                      and is used for storing the client at exit
455
 
    current_checker_command: string; current running checker_command
456
 
    disable_initiator_tag: a gobject event source tag, or None
457
 
    enabled:    bool()
458
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
459
 
                 uniquely identify the client
460
 
    host:       string; available for use by the checker command
461
 
    interval:   datetime.timedelta(); How often to start a new checker
462
 
    last_approval_request: datetime.datetime(); (UTC) or None
463
 
    last_checked_ok: datetime.datetime(); (UTC) or None
464
 
    last_checker_status: integer between 0 and 255 reflecting exit
465
 
                         status of last checker. -1 reflects crashed
466
 
                         checker, -2 means no checker completed yet.
467
 
    last_checker_signal: The signal which killed the last checker, if
468
 
                         last_checker_status is -1
469
 
    last_enabled: datetime.datetime(); (UTC) or None
470
 
    name:       string; from the config file, used in log messages and
471
 
                        D-Bus identifiers
472
 
    secret:     bytestring; sent verbatim (over TLS) to client
473
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
474
 
                                      until this client is disabled
475
 
    extended_timeout:   extra long timeout when secret has been sent
476
 
    runtime_expansions: Allowed attributes for runtime expansion.
477
 
    expires:    datetime.datetime(); time (UTC) when a client will be
478
 
                disabled, or None
479
 
    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: - '' -
480
131
    """
481
 
    
482
 
    runtime_expansions = ("approval_delay", "approval_duration",
483
 
                          "created", "enabled", "expires",
484
 
                          "fingerprint", "host", "interval",
485
 
                          "last_approval_request", "last_checked_ok",
486
 
                          "last_enabled", "name", "timeout")
487
 
    client_defaults = {
488
 
        "timeout": "PT5M",
489
 
        "extended_timeout": "PT15M",
490
 
        "interval": "PT2M",
491
 
        "checker": "fping -q -- %%(host)s",
492
 
        "host": "",
493
 
        "approval_delay": "PT0S",
494
 
        "approval_duration": "PT1S",
495
 
        "approved_by_default": "True",
496
 
        "enabled": "True",
497
 
    }
498
 
    
499
 
    @staticmethod
500
 
    def config_parser(config):
501
 
        """Construct a new dict of client settings of this form:
502
 
        { client_name: {setting_name: value, ...}, ...}
503
 
        with exceptions for any special settings as defined above.
504
 
        NOTE: Must be a pure function. Must return the same result
505
 
        value given the same arguments.
506
 
        """
507
 
        settings = {}
508
 
        for client_name in config.sections():
509
 
            section = dict(config.items(client_name))
510
 
            client = settings[client_name] = {}
511
 
            
512
 
            client["host"] = section["host"]
513
 
            # Reformat values from string types to Python types
514
 
            client["approved_by_default"] = config.getboolean(
515
 
                client_name, "approved_by_default")
516
 
            client["enabled"] = config.getboolean(client_name,
517
 
                                                  "enabled")
518
 
            
519
 
            # Uppercase and remove spaces from fingerprint for later
520
 
            # comparison purposes with return value from the
521
 
            # fingerprint() function
522
 
            client["fingerprint"] = (section["fingerprint"].upper()
523
 
                                     .replace(" ", ""))
524
 
            if "secret" in section:
525
 
                client["secret"] = section["secret"].decode("base64")
526
 
            elif "secfile" in section:
527
 
                with open(os.path.expanduser(os.path.expandvars
528
 
                                             (section["secfile"])),
529
 
                          "rb") as secfile:
530
 
                    client["secret"] = secfile.read()
531
 
            else:
532
 
                raise TypeError("No secret or secfile for section {}"
533
 
                                .format(section))
534
 
            client["timeout"] = string_to_delta(section["timeout"])
535
 
            client["extended_timeout"] = string_to_delta(
536
 
                section["extended_timeout"])
537
 
            client["interval"] = string_to_delta(section["interval"])
538
 
            client["approval_delay"] = string_to_delta(
539
 
                section["approval_delay"])
540
 
            client["approval_duration"] = string_to_delta(
541
 
                section["approval_duration"])
542
 
            client["checker_command"] = section["checker"]
543
 
            client["last_approval_request"] = None
544
 
            client["last_checked_ok"] = None
545
 
            client["last_checker_status"] = -2
546
 
        
547
 
        return settings
548
 
    
549
 
    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.."""
550
160
        self.name = name
551
 
        if server_settings is None:
552
 
            server_settings = {}
553
 
        self.server_settings = server_settings
554
 
        # adding all client settings
555
 
        for setting, value in settings.items():
556
 
            setattr(self, setting, value)
557
 
        
558
 
        if self.enabled:
559
 
            if not hasattr(self, "last_enabled"):
560
 
                self.last_enabled = datetime.datetime.utcnow()
561
 
            if not hasattr(self, "expires"):
562
 
                self.expires = (datetime.datetime.utcnow()
563
 
                                + 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()
564
173
        else:
565
 
            self.last_enabled = None
566
 
            self.expires = None
567
 
        
568
 
        logger.debug("Creating client %r", self.name)
569
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
570
 
        self.created = settings.get("created",
571
 
                                    datetime.datetime.utcnow())
572
 
        
573
 
        # 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
574
182
        self.checker = None
575
183
        self.checker_initiator_tag = None
576
 
        self.disable_initiator_tag = None
 
184
        self.stop_initiator_tag = None
577
185
        self.checker_callback_tag = None
578
 
        self.current_checker_command = None
579
 
        self.approved = None
580
 
        self.approvals_pending = 0
581
 
        self.changedstate = multiprocessing_manager.Condition(
582
 
            multiprocessing_manager.Lock())
583
 
        self.client_structure = [attr
584
 
                                 for attr in self.__dict__.iterkeys()
585
 
                                 if not attr.startswith("_")]
586
 
        self.client_structure.append("client_structure")
587
 
        
588
 
        for name, t in inspect.getmembers(
589
 
                type(self), lambda obj: isinstance(obj, property)):
590
 
            if not name.startswith("_"):
591
 
                self.client_structure.append(name)
592
 
    
593
 
    # Send notice to process children that client state has changed
594
 
    def send_changedstate(self):
595
 
        with self.changedstate:
596
 
            self.changedstate.notify_all()
597
 
    
598
 
    def enable(self):
 
186
        self.check_command = checker
 
187
    def start(self):
599
188
        """Start this client's checker and timeout hooks"""
600
 
        if getattr(self, "enabled", False):
601
 
            # Already enabled
602
 
            return
603
 
        self.expires = datetime.datetime.utcnow() + self.timeout
604
 
        self.enabled = True
605
 
        self.last_enabled = datetime.datetime.utcnow()
606
 
        self.init_checker()
607
 
        self.send_changedstate()
608
 
    
609
 
    def disable(self, quiet=True):
610
 
        """Disable this client."""
611
 
        if not getattr(self, "enabled", False):
612
 
            return False
613
 
        if not quiet:
614
 
            logger.info("Disabling client %s", self.name)
615
 
        if getattr(self, "disable_initiator_tag", None) is not None:
616
 
            gobject.source_remove(self.disable_initiator_tag)
617
 
            self.disable_initiator_tag = None
618
 
        self.expires = None
619
 
        if getattr(self, "checker_initiator_tag", None) is not None:
620
 
            gobject.source_remove(self.checker_initiator_tag)
621
 
            self.checker_initiator_tag = None
622
 
        self.stop_checker()
623
 
        self.enabled = False
624
 
        if not quiet:
625
 
            self.send_changedstate()
626
 
        # Do not run this again if called by a gobject.timeout_add
627
 
        return False
628
 
    
629
 
    def __del__(self):
630
 
        self.disable()
631
 
    
632
 
    def init_checker(self):
633
189
        # Schedule a new checker to be started an 'interval' from now,
634
190
        # and every interval from then on.
635
 
        if self.checker_initiator_tag is not None:
636
 
            gobject.source_remove(self.checker_initiator_tag)
637
 
        self.checker_initiator_tag = gobject.timeout_add(
638
 
            int(self.interval.total_seconds() * 1000),
639
 
            self.start_checker)
640
 
        # Schedule a disable() when 'timeout' has passed
641
 
        if self.disable_initiator_tag is not None:
642
 
            gobject.source_remove(self.disable_initiator_tag)
643
 
        self.disable_initiator_tag = gobject.timeout_add(
644
 
            int(self.timeout.total_seconds() * 1000), self.disable)
 
191
        self.checker_initiator_tag = gobject.timeout_add\
 
192
                                     (self._interval_milliseconds,
 
193
                                      self.start_checker)
645
194
        # Also start a new checker *right now*.
646
195
        self.start_checker()
647
 
    
648
 
    def checker_callback(self, source, condition,
649
 
                         (connection, 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):
650
227
        """The checker has completed, so take appropriate actions."""
 
228
        now = datetime.datetime.now()
651
229
        self.checker_callback_tag = None
652
230
        self.checker = None
653
 
        # Read return code from connection (see subprocess_call_pipe)
654
 
        returncode = connection.recv()
655
 
        connection.close()
656
 
        
657
 
        if returncode >= 0:
658
 
            self.last_checker_status = returncode
659
 
            self.last_checker_signal = None
660
 
            if self.last_checker_status == 0:
661
 
                logger.info("Checker for %(name)s succeeded",
662
 
                            vars(self))
663
 
                self.checked_ok()
664
 
            else:
665
 
                logger.info("Checker for %(name)s failed", vars(self))
666
 
        else:
667
 
            self.last_checker_status = -1
668
 
            self.last_checker_signal = -returncode
669
 
            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?",
670
242
                           vars(self))
671
 
        return False
672
 
    
673
 
    def checked_ok(self):
674
 
        """Assert that the client has been seen, alive and well."""
675
 
        self.last_checked_ok = datetime.datetime.utcnow()
676
 
        self.last_checker_status = 0
677
 
        self.last_checker_signal = None
678
 
        self.bump_timeout()
679
 
    
680
 
    def bump_timeout(self, timeout=None):
681
 
        """Bump up the timeout for this client."""
682
 
        if timeout is None:
683
 
            timeout = self.timeout
684
 
        if self.disable_initiator_tag is not None:
685
 
            gobject.source_remove(self.disable_initiator_tag)
686
 
            self.disable_initiator_tag = None
687
 
        if getattr(self, "enabled", False):
688
 
            self.disable_initiator_tag = gobject.timeout_add(
689
 
                int(timeout.total_seconds() * 1000), self.disable)
690
 
            self.expires = datetime.datetime.utcnow() + timeout
691
 
    
692
 
    def need_approval(self):
693
 
        self.last_approval_request = datetime.datetime.utcnow()
694
 
    
 
243
        else:
 
244
            logger.debug(u"Checker for %(name)s failed",
 
245
                         vars(self))
695
246
    def start_checker(self):
696
247
        """Start a new checker subprocess if one is not running.
697
 
        
698
248
        If a checker already exists, leave it running and do
699
249
        nothing."""
700
250
        # The reason for not killing a running checker is that if we
701
 
        # did that, and if a checker (for some reason) started running
702
 
        # slowly and taking more than 'interval' time, then the client
703
 
        # would inevitably timeout, since no checker would get a
704
 
        # 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
705
255
        # checkers alone, the checker would have to take more time
706
 
        # than 'timeout' for the client to be disabled, which is as it
707
 
        # should be.
708
 
        
709
 
        if self.checker is not None and not self.checker.is_alive():
710
 
            logger.warning("Checker was not alive; joining")
711
 
            self.checker.join()
712
 
            self.checker = None
713
 
        # Start a new checker if needed
 
256
        # than 'timeout' for the client to be declared invalid, which
 
257
        # is as it should be.
714
258
        if self.checker is None:
715
 
            # Escape attributes for the shell
716
 
            escaped_attrs = {
717
 
                attr: re.escape(str(getattr(self, attr)))
718
 
                for attr in self.runtime_expansions }
719
 
            try:
720
 
                command = self.checker_command % escaped_attrs
721
 
            except TypeError as error:
722
 
                logger.error('Could not format string "%s"',
723
 
                             self.checker_command,
724
 
                             exc_info=error)
725
 
                return True     # Try again later
726
 
            self.current_checker_command = command
727
 
            logger.info("Starting checker %r for %s", command,
728
 
                        self.name)
729
 
            # We don't need to redirect stdout and stderr, since
730
 
            # in normal mode, that is already done by daemon(),
731
 
            # and in debug mode we don't want to.  (Stdin is
732
 
            # always replaced by /dev/null.)
733
 
            # The exception is when not debugging but nevertheless
734
 
            # running in the foreground; use the previously
735
 
            # created wnull.
736
 
            popen_args = { "close_fds": True,
737
 
                           "shell": True,
738
 
                           "cwd": "/" }
739
 
            if (not self.server_settings["debug"]
740
 
                and self.server_settings["foreground"]):
741
 
                popen_args.update({"stdout": wnull,
742
 
                                   "stderr": wnull })
743
 
            pipe = multiprocessing.Pipe(duplex=False)
744
 
            self.checker = multiprocessing.Process(
745
 
                target=subprocess_call_pipe, args=(pipe[1], command),
746
 
                kwargs=popen_args)
747
 
            self.checker.start()
748
 
            self.checker_callback_tag = gobject.io_add_watch(
749
 
                pipe[0].fileno(), gobject.IO_IN,
750
 
                self.checker_callback, (pipe[0], 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)
751
284
        # Re-run this periodically if run by gobject.timeout_add
752
285
        return True
753
 
    
754
286
    def stop_checker(self):
755
287
        """Force the checker process, if any, to stop."""
756
288
        if self.checker_callback_tag:
757
289
            gobject.source_remove(self.checker_callback_tag)
758
290
            self.checker_callback_tag = None
759
 
        if getattr(self, "checker", None) is None:
 
291
        if not hasattr(self, "checker") or self.checker is None:
760
292
            return
761
293
        logger.debug("Stopping checker for %(name)s", vars(self))
762
 
        self.checker.terminate()
 
294
        try:
 
295
            os.kill(self.checker.pid, signal.SIGTERM)
 
296
            #os.sleep(0.5)
 
297
            #if self.checker.poll() is None:
 
298
            #    os.kill(self.checker.pid, signal.SIGKILL)
 
299
        except OSError, error:
 
300
            if error.errno != errno.ESRCH:
 
301
                raise
763
302
        self.checker = None
764
 
 
765
 
 
766
 
def dbus_service_property(dbus_interface,
767
 
                          signature="v",
768
 
                          access="readwrite",
769
 
                          byte_arrays=False):
770
 
    """Decorators for marking methods of a DBusObjectWithProperties to
771
 
    become properties on the D-Bus.
772
 
    
773
 
    The decorated method will be called with no arguments by "Get"
774
 
    and with one argument by "Set".
775
 
    
776
 
    The parameters, where they are supported, are the same as
777
 
    dbus.service.method, except there is only "signature", since the
778
 
    type from Get() and the type sent to Set() is the same.
779
 
    """
780
 
    # Encoding deeply encoded byte arrays is not supported yet by the
781
 
    # "Set" method, so we fail early here:
782
 
    if byte_arrays and signature != "ay":
783
 
        raise ValueError("Byte arrays not supported for non-'ay'"
784
 
                         " signature {!r}".format(signature))
785
 
    
786
 
    def decorator(func):
787
 
        func._dbus_is_property = True
788
 
        func._dbus_interface = dbus_interface
789
 
        func._dbus_signature = signature
790
 
        func._dbus_access = access
791
 
        func._dbus_name = func.__name__
792
 
        if func._dbus_name.endswith("_dbus_property"):
793
 
            func._dbus_name = func._dbus_name[:-14]
794
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
795
 
        return func
796
 
    
797
 
    return decorator
798
 
 
799
 
 
800
 
def dbus_interface_annotations(dbus_interface):
801
 
    """Decorator for marking functions returning interface annotations
802
 
    
803
 
    Usage:
804
 
    
805
 
    @dbus_interface_annotations("org.example.Interface")
806
 
    def _foo(self):  # Function name does not matter
807
 
        return {"org.freedesktop.DBus.Deprecated": "true",
808
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
809
 
                    "false"}
810
 
    """
811
 
    
812
 
    def decorator(func):
813
 
        func._dbus_is_interface = True
814
 
        func._dbus_interface = dbus_interface
815
 
        func._dbus_name = dbus_interface
816
 
        return func
817
 
    
818
 
    return decorator
819
 
 
820
 
 
821
 
def dbus_annotations(annotations):
822
 
    """Decorator to annotate D-Bus methods, signals or properties
823
 
    Usage:
824
 
    
825
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
826
 
                       "org.freedesktop.DBus.Property."
827
 
                       "EmitsChangedSignal": "false"})
828
 
    @dbus_service_property("org.example.Interface", signature="b",
829
 
                           access="r")
830
 
    def Property_dbus_property(self):
831
 
        return dbus.Boolean(False)
832
 
    """
833
 
    
834
 
    def decorator(func):
835
 
        func._dbus_annotations = annotations
836
 
        return func
837
 
    
838
 
    return decorator
839
 
 
840
 
 
841
 
class DBusPropertyException(dbus.exceptions.DBusException):
842
 
    """A base class for D-Bus property-related exceptions
843
 
    """
844
 
    pass
845
 
 
846
 
 
847
 
class DBusPropertyAccessException(DBusPropertyException):
848
 
    """A property's access permissions disallows an operation.
849
 
    """
850
 
    pass
851
 
 
852
 
 
853
 
class DBusPropertyNotFound(DBusPropertyException):
854
 
    """An attempt was made to access a non-existing property.
855
 
    """
856
 
    pass
857
 
 
858
 
 
859
 
class DBusObjectWithProperties(dbus.service.Object):
860
 
    """A D-Bus object with properties.
861
 
    
862
 
    Classes inheriting from this can use the dbus_service_property
863
 
    decorator to expose methods as D-Bus properties.  It exposes the
864
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
865
 
    """
866
 
    
867
 
    @staticmethod
868
 
    def _is_dbus_thing(thing):
869
 
        """Returns a function testing if an attribute is a D-Bus thing
870
 
        
871
 
        If called like _is_dbus_thing("method") it returns a function
872
 
        suitable for use as predicate to inspect.getmembers().
873
 
        """
874
 
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
875
 
                                   False)
876
 
    
877
 
    def _get_all_dbus_things(self, thing):
878
 
        """Returns a generator of (name, attribute) pairs
879
 
        """
880
 
        return ((getattr(athing.__get__(self), "_dbus_name", name),
881
 
                 athing.__get__(self))
882
 
                for cls in self.__class__.__mro__
883
 
                for name, athing in
884
 
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
885
 
    
886
 
    def _get_dbus_property(self, interface_name, property_name):
887
 
        """Returns a bound method if one exists which is a D-Bus
888
 
        property with the specified name and interface.
889
 
        """
890
 
        for cls in self.__class__.__mro__:
891
 
            for name, value in inspect.getmembers(
892
 
                    cls, self._is_dbus_thing("property")):
893
 
                if (value._dbus_name == property_name
894
 
                    and value._dbus_interface == interface_name):
895
 
                    return value.__get__(self)
896
 
        
897
 
        # No such property
898
 
        raise DBusPropertyNotFound("{}:{}.{}".format(
899
 
            self.dbus_object_path, interface_name, property_name))
900
 
    
901
 
    @dbus.service.method(dbus.PROPERTIES_IFACE,
902
 
                         in_signature="ss",
903
 
                         out_signature="v")
904
 
    def Get(self, interface_name, property_name):
905
 
        """Standard D-Bus property Get() method, see D-Bus standard.
906
 
        """
907
 
        prop = self._get_dbus_property(interface_name, property_name)
908
 
        if prop._dbus_access == "write":
909
 
            raise DBusPropertyAccessException(property_name)
910
 
        value = prop()
911
 
        if not hasattr(value, "variant_level"):
912
 
            return value
913
 
        return type(value)(value, variant_level=value.variant_level+1)
914
 
    
915
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
916
 
    def Set(self, interface_name, property_name, value):
917
 
        """Standard D-Bus property Set() method, see D-Bus standard.
918
 
        """
919
 
        prop = self._get_dbus_property(interface_name, property_name)
920
 
        if prop._dbus_access == "read":
921
 
            raise DBusPropertyAccessException(property_name)
922
 
        if prop._dbus_get_args_options["byte_arrays"]:
923
 
            # The byte_arrays option is not supported yet on
924
 
            # signatures other than "ay".
925
 
            if prop._dbus_signature != "ay":
926
 
                raise ValueError("Byte arrays not supported for non-"
927
 
                                 "'ay' signature {!r}"
928
 
                                 .format(prop._dbus_signature))
929
 
            value = dbus.ByteArray(b''.join(chr(byte)
930
 
                                            for byte in value))
931
 
        prop(value)
932
 
    
933
 
    @dbus.service.method(dbus.PROPERTIES_IFACE,
934
 
                         in_signature="s",
935
 
                         out_signature="a{sv}")
936
 
    def GetAll(self, interface_name):
937
 
        """Standard D-Bus property GetAll() method, see D-Bus
938
 
        standard.
939
 
        
940
 
        Note: Will not include properties with access="write".
941
 
        """
942
 
        properties = {}
943
 
        for name, prop in self._get_all_dbus_things("property"):
944
 
            if (interface_name
945
 
                and interface_name != prop._dbus_interface):
946
 
                # Interface non-empty but did not match
947
 
                continue
948
 
            # Ignore write-only properties
949
 
            if prop._dbus_access == "write":
950
 
                continue
951
 
            value = prop()
952
 
            if not hasattr(value, "variant_level"):
953
 
                properties[name] = value
954
 
                continue
955
 
            properties[name] = type(value)(
956
 
                value, variant_level = value.variant_level + 1)
957
 
        return dbus.Dictionary(properties, signature="sv")
958
 
    
959
 
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
960
 
    def PropertiesChanged(self, interface_name, changed_properties,
961
 
                          invalidated_properties):
962
 
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
963
 
        standard.
964
 
        """
965
 
        pass
966
 
    
967
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
968
 
                         out_signature="s",
969
 
                         path_keyword='object_path',
970
 
                         connection_keyword='connection')
971
 
    def Introspect(self, object_path, connection):
972
 
        """Overloading of standard D-Bus method.
973
 
        
974
 
        Inserts property tags and interface annotation tags.
975
 
        """
976
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
977
 
                                                   connection)
978
 
        try:
979
 
            document = xml.dom.minidom.parseString(xmlstring)
980
 
            
981
 
            def make_tag(document, name, prop):
982
 
                e = document.createElement("property")
983
 
                e.setAttribute("name", name)
984
 
                e.setAttribute("type", prop._dbus_signature)
985
 
                e.setAttribute("access", prop._dbus_access)
986
 
                return e
987
 
            
988
 
            for if_tag in document.getElementsByTagName("interface"):
989
 
                # Add property tags
990
 
                for tag in (make_tag(document, name, prop)
991
 
                            for name, prop
992
 
                            in self._get_all_dbus_things("property")
993
 
                            if prop._dbus_interface
994
 
                            == if_tag.getAttribute("name")):
995
 
                    if_tag.appendChild(tag)
996
 
                # Add annotation tags
997
 
                for typ in ("method", "signal", "property"):
998
 
                    for tag in if_tag.getElementsByTagName(typ):
999
 
                        annots = dict()
1000
 
                        for name, prop in (self.
1001
 
                                           _get_all_dbus_things(typ)):
1002
 
                            if (name == tag.getAttribute("name")
1003
 
                                and prop._dbus_interface
1004
 
                                == if_tag.getAttribute("name")):
1005
 
                                annots.update(getattr(
1006
 
                                    prop, "_dbus_annotations", {}))
1007
 
                        for name, value in annots.items():
1008
 
                            ann_tag = document.createElement(
1009
 
                                "annotation")
1010
 
                            ann_tag.setAttribute("name", name)
1011
 
                            ann_tag.setAttribute("value", value)
1012
 
                            tag.appendChild(ann_tag)
1013
 
                # Add interface annotation tags
1014
 
                for annotation, value in dict(
1015
 
                    itertools.chain.from_iterable(
1016
 
                        annotations().items()
1017
 
                        for name, annotations
1018
 
                        in self._get_all_dbus_things("interface")
1019
 
                        if name == if_tag.getAttribute("name")
1020
 
                        )).items():
1021
 
                    ann_tag = document.createElement("annotation")
1022
 
                    ann_tag.setAttribute("name", annotation)
1023
 
                    ann_tag.setAttribute("value", value)
1024
 
                    if_tag.appendChild(ann_tag)
1025
 
                # Add the names to the return values for the
1026
 
                # "org.freedesktop.DBus.Properties" methods
1027
 
                if (if_tag.getAttribute("name")
1028
 
                    == "org.freedesktop.DBus.Properties"):
1029
 
                    for cn in if_tag.getElementsByTagName("method"):
1030
 
                        if cn.getAttribute("name") == "Get":
1031
 
                            for arg in cn.getElementsByTagName("arg"):
1032
 
                                if (arg.getAttribute("direction")
1033
 
                                    == "out"):
1034
 
                                    arg.setAttribute("name", "value")
1035
 
                        elif cn.getAttribute("name") == "GetAll":
1036
 
                            for arg in cn.getElementsByTagName("arg"):
1037
 
                                if (arg.getAttribute("direction")
1038
 
                                    == "out"):
1039
 
                                    arg.setAttribute("name", "props")
1040
 
            xmlstring = document.toxml("utf-8")
1041
 
            document.unlink()
1042
 
        except (AttributeError, xml.dom.DOMException,
1043
 
                xml.parsers.expat.ExpatError) as error:
1044
 
            logger.error("Failed to override Introspection method",
1045
 
                         exc_info=error)
1046
 
        return xmlstring
1047
 
 
1048
 
 
1049
 
def datetime_to_dbus(dt, variant_level=0):
1050
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1051
 
    if dt is None:
1052
 
        return dbus.String("", variant_level = variant_level)
1053
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
1054
 
 
1055
 
 
1056
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1057
 
    """A class decorator; applied to a subclass of
1058
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1059
 
    interface names according to the "alt_interface_names" mapping.
1060
 
    Usage:
1061
 
    
1062
 
    @alternate_dbus_interfaces({"org.example.Interface":
1063
 
                                    "net.example.AlternateInterface"})
1064
 
    class SampleDBusObject(dbus.service.Object):
1065
 
        @dbus.service.method("org.example.Interface")
1066
 
        def SampleDBusMethod():
1067
 
            pass
1068
 
    
1069
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1070
 
    reachable via two interfaces: "org.example.Interface" and
1071
 
    "net.example.AlternateInterface", the latter of which will have
1072
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1073
 
    "true", unless "deprecate" is passed with a False value.
1074
 
    
1075
 
    This works for methods and signals, and also for D-Bus properties
1076
 
    (from DBusObjectWithProperties) and interfaces (from the
1077
 
    dbus_interface_annotations decorator).
1078
 
    """
1079
 
    
1080
 
    def wrapper(cls):
1081
 
        for orig_interface_name, alt_interface_name in (
1082
 
                alt_interface_names.items()):
1083
 
            attr = {}
1084
 
            interface_names = set()
1085
 
            # Go though all attributes of the class
1086
 
            for attrname, attribute in inspect.getmembers(cls):
1087
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1088
 
                # with the wrong interface name
1089
 
                if (not hasattr(attribute, "_dbus_interface")
1090
 
                    or not attribute._dbus_interface.startswith(
1091
 
                        orig_interface_name)):
1092
 
                    continue
1093
 
                # Create an alternate D-Bus interface name based on
1094
 
                # the current name
1095
 
                alt_interface = attribute._dbus_interface.replace(
1096
 
                    orig_interface_name, alt_interface_name)
1097
 
                interface_names.add(alt_interface)
1098
 
                # Is this a D-Bus signal?
1099
 
                if getattr(attribute, "_dbus_is_signal", False):
1100
 
                    # Extract the original non-method undecorated
1101
 
                    # function by black magic
1102
 
                    nonmethod_func = (dict(
1103
 
                        zip(attribute.func_code.co_freevars,
1104
 
                            attribute.__closure__))
1105
 
                                      ["func"].cell_contents)
1106
 
                    # Create a new, but exactly alike, function
1107
 
                    # object, and decorate it to be a new D-Bus signal
1108
 
                    # with the alternate D-Bus interface name
1109
 
                    new_function = (dbus.service.signal(
1110
 
                        alt_interface, attribute._dbus_signature)
1111
 
                                    (types.FunctionType(
1112
 
                                        nonmethod_func.func_code,
1113
 
                                        nonmethod_func.func_globals,
1114
 
                                        nonmethod_func.func_name,
1115
 
                                        nonmethod_func.func_defaults,
1116
 
                                        nonmethod_func.func_closure)))
1117
 
                    # Copy annotations, if any
1118
 
                    try:
1119
 
                        new_function._dbus_annotations = dict(
1120
 
                            attribute._dbus_annotations)
1121
 
                    except AttributeError:
1122
 
                        pass
1123
 
                    # Define a creator of a function to call both the
1124
 
                    # original and alternate functions, so both the
1125
 
                    # original and alternate signals gets sent when
1126
 
                    # the function is called
1127
 
                    def fixscope(func1, func2):
1128
 
                        """This function is a scope container to pass
1129
 
                        func1 and func2 to the "call_both" function
1130
 
                        outside of its arguments"""
1131
 
                        
1132
 
                        def call_both(*args, **kwargs):
1133
 
                            """This function will emit two D-Bus
1134
 
                            signals by calling func1 and func2"""
1135
 
                            func1(*args, **kwargs)
1136
 
                            func2(*args, **kwargs)
1137
 
                        
1138
 
                        return call_both
1139
 
                    # Create the "call_both" function and add it to
1140
 
                    # the class
1141
 
                    attr[attrname] = fixscope(attribute, new_function)
1142
 
                # Is this a D-Bus method?
1143
 
                elif getattr(attribute, "_dbus_is_method", False):
1144
 
                    # Create a new, but exactly alike, function
1145
 
                    # object.  Decorate it to be a new D-Bus method
1146
 
                    # with the alternate D-Bus interface name.  Add it
1147
 
                    # to the class.
1148
 
                    attr[attrname] = (
1149
 
                        dbus.service.method(
1150
 
                            alt_interface,
1151
 
                            attribute._dbus_in_signature,
1152
 
                            attribute._dbus_out_signature)
1153
 
                        (types.FunctionType(attribute.func_code,
1154
 
                                            attribute.func_globals,
1155
 
                                            attribute.func_name,
1156
 
                                            attribute.func_defaults,
1157
 
                                            attribute.func_closure)))
1158
 
                    # Copy annotations, if any
1159
 
                    try:
1160
 
                        attr[attrname]._dbus_annotations = dict(
1161
 
                            attribute._dbus_annotations)
1162
 
                    except AttributeError:
1163
 
                        pass
1164
 
                # Is this a D-Bus property?
1165
 
                elif getattr(attribute, "_dbus_is_property", False):
1166
 
                    # Create a new, but exactly alike, function
1167
 
                    # object, and decorate it to be a new D-Bus
1168
 
                    # property with the alternate D-Bus interface
1169
 
                    # name.  Add it to the class.
1170
 
                    attr[attrname] = (dbus_service_property(
1171
 
                        alt_interface, attribute._dbus_signature,
1172
 
                        attribute._dbus_access,
1173
 
                        attribute._dbus_get_args_options
1174
 
                        ["byte_arrays"])
1175
 
                                      (types.FunctionType(
1176
 
                                          attribute.func_code,
1177
 
                                          attribute.func_globals,
1178
 
                                          attribute.func_name,
1179
 
                                          attribute.func_defaults,
1180
 
                                          attribute.func_closure)))
1181
 
                    # Copy annotations, if any
1182
 
                    try:
1183
 
                        attr[attrname]._dbus_annotations = dict(
1184
 
                            attribute._dbus_annotations)
1185
 
                    except AttributeError:
1186
 
                        pass
1187
 
                # Is this a D-Bus interface?
1188
 
                elif getattr(attribute, "_dbus_is_interface", False):
1189
 
                    # Create a new, but exactly alike, function
1190
 
                    # object.  Decorate it to be a new D-Bus interface
1191
 
                    # with the alternate D-Bus interface name.  Add it
1192
 
                    # to the class.
1193
 
                    attr[attrname] = (
1194
 
                        dbus_interface_annotations(alt_interface)
1195
 
                        (types.FunctionType(attribute.func_code,
1196
 
                                            attribute.func_globals,
1197
 
                                            attribute.func_name,
1198
 
                                            attribute.func_defaults,
1199
 
                                            attribute.func_closure)))
1200
 
            if deprecate:
1201
 
                # Deprecate all alternate interfaces
1202
 
                iname="_AlternateDBusNames_interface_annotation{}"
1203
 
                for interface_name in interface_names:
1204
 
                    
1205
 
                    @dbus_interface_annotations(interface_name)
1206
 
                    def func(self):
1207
 
                        return { "org.freedesktop.DBus.Deprecated":
1208
 
                                 "true" }
1209
 
                    # Find an unused name
1210
 
                    for aname in (iname.format(i)
1211
 
                                  for i in itertools.count()):
1212
 
                        if aname not in attr:
1213
 
                            attr[aname] = func
1214
 
                            break
1215
 
            if interface_names:
1216
 
                # Replace the class with a new subclass of it with
1217
 
                # methods, signals, etc. as created above.
1218
 
                cls = type(b"{}Alternate".format(cls.__name__),
1219
 
                           (cls, ), attr)
1220
 
        return cls
1221
 
    
1222
 
    return wrapper
1223
 
 
1224
 
 
1225
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1226
 
                            "se.bsnet.fukt.Mandos"})
1227
 
class ClientDBus(Client, DBusObjectWithProperties):
1228
 
    """A Client class using D-Bus
1229
 
    
1230
 
    Attributes:
1231
 
    dbus_object_path: dbus.ObjectPath
1232
 
    bus: dbus.SystemBus()
1233
 
    """
1234
 
    
1235
 
    runtime_expansions = (Client.runtime_expansions
1236
 
                          + ("dbus_object_path", ))
1237
 
    
1238
 
    _interface = "se.recompile.Mandos.Client"
1239
 
    
1240
 
    # dbus.service.Object doesn't use super(), so we can't either.
1241
 
    
1242
 
    def __init__(self, bus = None, *args, **kwargs):
1243
 
        self.bus = bus
1244
 
        Client.__init__(self, *args, **kwargs)
1245
 
        # Only now, when this client is initialized, can it show up on
1246
 
        # the D-Bus
1247
 
        client_object_name = str(self.name).translate(
1248
 
            {ord("."): ord("_"),
1249
 
             ord("-"): ord("_")})
1250
 
        self.dbus_object_path = dbus.ObjectPath(
1251
 
            "/clients/" + client_object_name)
1252
 
        DBusObjectWithProperties.__init__(self, self.bus,
1253
 
                                          self.dbus_object_path)
1254
 
    
1255
 
    def notifychangeproperty(transform_func, dbus_name,
1256
 
                             type_func=lambda x: x,
1257
 
                             variant_level=1,
1258
 
                             invalidate_only=False,
1259
 
                             _interface=_interface):
1260
 
        """ Modify a variable so that it's a property which announces
1261
 
        its changes to DBus.
1262
 
        
1263
 
        transform_fun: Function that takes a value and a variant_level
1264
 
                       and transforms it to a D-Bus type.
1265
 
        dbus_name: D-Bus name of the variable
1266
 
        type_func: Function that transform the value before sending it
1267
 
                   to the D-Bus.  Default: no transform
1268
 
        variant_level: D-Bus variant level.  Default: 1
1269
 
        """
1270
 
        attrname = "_{}".format(dbus_name)
1271
 
        
1272
 
        def setter(self, value):
1273
 
            if hasattr(self, "dbus_object_path"):
1274
 
                if (not hasattr(self, attrname) or
1275
 
                    type_func(getattr(self, attrname, None))
1276
 
                    != type_func(value)):
1277
 
                    if invalidate_only:
1278
 
                        self.PropertiesChanged(
1279
 
                            _interface, dbus.Dictionary(),
1280
 
                            dbus.Array((dbus_name, )))
1281
 
                    else:
1282
 
                        dbus_value = transform_func(
1283
 
                            type_func(value),
1284
 
                            variant_level = variant_level)
1285
 
                        self.PropertyChanged(dbus.String(dbus_name),
1286
 
                                             dbus_value)
1287
 
                        self.PropertiesChanged(
1288
 
                            _interface,
1289
 
                            dbus.Dictionary({ dbus.String(dbus_name):
1290
 
                                              dbus_value }),
1291
 
                            dbus.Array())
1292
 
            setattr(self, attrname, value)
1293
 
        
1294
 
        return property(lambda self: getattr(self, attrname), setter)
1295
 
    
1296
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1297
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1298
 
                                             "ApprovalPending",
1299
 
                                             type_func = bool)
1300
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1301
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1302
 
                                        "LastEnabled")
1303
 
    checker = notifychangeproperty(
1304
 
        dbus.Boolean, "CheckerRunning",
1305
 
        type_func = lambda checker: checker is not None)
1306
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1307
 
                                           "LastCheckedOK")
1308
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1309
 
                                               "LastCheckerStatus")
1310
 
    last_approval_request = notifychangeproperty(
1311
 
        datetime_to_dbus, "LastApprovalRequest")
1312
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1313
 
                                               "ApprovedByDefault")
1314
 
    approval_delay = notifychangeproperty(
1315
 
        dbus.UInt64, "ApprovalDelay",
1316
 
        type_func = lambda td: td.total_seconds() * 1000)
1317
 
    approval_duration = notifychangeproperty(
1318
 
        dbus.UInt64, "ApprovalDuration",
1319
 
        type_func = lambda td: td.total_seconds() * 1000)
1320
 
    host = notifychangeproperty(dbus.String, "Host")
1321
 
    timeout = notifychangeproperty(
1322
 
        dbus.UInt64, "Timeout",
1323
 
        type_func = lambda td: td.total_seconds() * 1000)
1324
 
    extended_timeout = notifychangeproperty(
1325
 
        dbus.UInt64, "ExtendedTimeout",
1326
 
        type_func = lambda td: td.total_seconds() * 1000)
1327
 
    interval = notifychangeproperty(
1328
 
        dbus.UInt64, "Interval",
1329
 
        type_func = lambda td: td.total_seconds() * 1000)
1330
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1331
 
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
1332
 
                                  invalidate_only=True)
1333
 
    
1334
 
    del notifychangeproperty
1335
 
    
1336
 
    def __del__(self, *args, **kwargs):
1337
 
        try:
1338
 
            self.remove_from_connection()
1339
 
        except LookupError:
1340
 
            pass
1341
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1342
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1343
 
        Client.__del__(self, *args, **kwargs)
1344
 
    
1345
 
    def checker_callback(self, source, condition,
1346
 
                         (connection, command), *args, **kwargs):
1347
 
        ret = Client.checker_callback(self, source, condition,
1348
 
                                      (connection, command), *args,
1349
 
                                      **kwargs)
1350
 
        exitstatus = self.last_checker_status
1351
 
        if exitstatus >= 0:
1352
 
            # Emit D-Bus signal
1353
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1354
 
                                  dbus.Int64(0),
1355
 
                                  dbus.String(command))
1356
 
        else:
1357
 
            # Emit D-Bus signal
1358
 
            self.CheckerCompleted(dbus.Int16(-1),
1359
 
                                  dbus.Int64(
1360
 
                                      self.last_checker_signal),
1361
 
                                  dbus.String(command))
1362
 
        return ret
1363
 
    
1364
 
    def start_checker(self, *args, **kwargs):
1365
 
        old_checker_pid = getattr(self.checker, "pid", None)
1366
 
        r = Client.start_checker(self, *args, **kwargs)
1367
 
        # Only if new checker process was started
1368
 
        if (self.checker is not None
1369
 
            and old_checker_pid != self.checker.pid):
1370
 
            # Emit D-Bus signal
1371
 
            self.CheckerStarted(self.current_checker_command)
1372
 
        return r
1373
 
    
1374
 
    def _reset_approved(self):
1375
 
        self.approved = None
1376
 
        return False
1377
 
    
1378
 
    def approve(self, value=True):
1379
 
        self.approved = value
1380
 
        gobject.timeout_add(int(self.approval_duration.total_seconds()
1381
 
                                * 1000), self._reset_approved)
1382
 
        self.send_changedstate()
1383
 
    
1384
 
    ## D-Bus methods, signals & properties
1385
 
    
1386
 
    ## Interfaces
1387
 
    
1388
 
    ## Signals
1389
 
    
1390
 
    # CheckerCompleted - signal
1391
 
    @dbus.service.signal(_interface, signature="nxs")
1392
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1393
 
        "D-Bus signal"
1394
 
        pass
1395
 
    
1396
 
    # CheckerStarted - signal
1397
 
    @dbus.service.signal(_interface, signature="s")
1398
 
    def CheckerStarted(self, command):
1399
 
        "D-Bus signal"
1400
 
        pass
1401
 
    
1402
 
    # PropertyChanged - signal
1403
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1404
 
    @dbus.service.signal(_interface, signature="sv")
1405
 
    def PropertyChanged(self, property, value):
1406
 
        "D-Bus signal"
1407
 
        pass
1408
 
    
1409
 
    # GotSecret - signal
1410
 
    @dbus.service.signal(_interface)
1411
 
    def GotSecret(self):
1412
 
        """D-Bus signal
1413
 
        Is sent after a successful transfer of secret from the Mandos
1414
 
        server to mandos-client
1415
 
        """
1416
 
        pass
1417
 
    
1418
 
    # Rejected - signal
1419
 
    @dbus.service.signal(_interface, signature="s")
1420
 
    def Rejected(self, reason):
1421
 
        "D-Bus signal"
1422
 
        pass
1423
 
    
1424
 
    # NeedApproval - signal
1425
 
    @dbus.service.signal(_interface, signature="tb")
1426
 
    def NeedApproval(self, timeout, default):
1427
 
        "D-Bus signal"
1428
 
        return self.need_approval()
1429
 
    
1430
 
    ## Methods
1431
 
    
1432
 
    # Approve - method
1433
 
    @dbus.service.method(_interface, in_signature="b")
1434
 
    def Approve(self, value):
1435
 
        self.approve(value)
1436
 
    
1437
 
    # CheckedOK - method
1438
 
    @dbus.service.method(_interface)
1439
 
    def CheckedOK(self):
1440
 
        self.checked_ok()
1441
 
    
1442
 
    # Enable - method
1443
 
    @dbus.service.method(_interface)
1444
 
    def Enable(self):
1445
 
        "D-Bus method"
1446
 
        self.enable()
1447
 
    
1448
 
    # StartChecker - method
1449
 
    @dbus.service.method(_interface)
1450
 
    def StartChecker(self):
1451
 
        "D-Bus method"
1452
 
        self.start_checker()
1453
 
    
1454
 
    # Disable - method
1455
 
    @dbus.service.method(_interface)
1456
 
    def Disable(self):
1457
 
        "D-Bus method"
1458
 
        self.disable()
1459
 
    
1460
 
    # StopChecker - method
1461
 
    @dbus.service.method(_interface)
1462
 
    def StopChecker(self):
1463
 
        self.stop_checker()
1464
 
    
1465
 
    ## Properties
1466
 
    
1467
 
    # ApprovalPending - property
1468
 
    @dbus_service_property(_interface, signature="b", access="read")
1469
 
    def ApprovalPending_dbus_property(self):
1470
 
        return dbus.Boolean(bool(self.approvals_pending))
1471
 
    
1472
 
    # ApprovedByDefault - property
1473
 
    @dbus_service_property(_interface,
1474
 
                           signature="b",
1475
 
                           access="readwrite")
1476
 
    def ApprovedByDefault_dbus_property(self, value=None):
1477
 
        if value is None:       # get
1478
 
            return dbus.Boolean(self.approved_by_default)
1479
 
        self.approved_by_default = bool(value)
1480
 
    
1481
 
    # ApprovalDelay - property
1482
 
    @dbus_service_property(_interface,
1483
 
                           signature="t",
1484
 
                           access="readwrite")
1485
 
    def ApprovalDelay_dbus_property(self, value=None):
1486
 
        if value is None:       # get
1487
 
            return dbus.UInt64(self.approval_delay.total_seconds()
1488
 
                               * 1000)
1489
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1490
 
    
1491
 
    # ApprovalDuration - property
1492
 
    @dbus_service_property(_interface,
1493
 
                           signature="t",
1494
 
                           access="readwrite")
1495
 
    def ApprovalDuration_dbus_property(self, value=None):
1496
 
        if value is None:       # get
1497
 
            return dbus.UInt64(self.approval_duration.total_seconds()
1498
 
                               * 1000)
1499
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1500
 
    
1501
 
    # Name - property
1502
 
    @dbus_service_property(_interface, signature="s", access="read")
1503
 
    def Name_dbus_property(self):
1504
 
        return dbus.String(self.name)
1505
 
    
1506
 
    # Fingerprint - property
1507
 
    @dbus_service_property(_interface, signature="s", access="read")
1508
 
    def Fingerprint_dbus_property(self):
1509
 
        return dbus.String(self.fingerprint)
1510
 
    
1511
 
    # Host - property
1512
 
    @dbus_service_property(_interface,
1513
 
                           signature="s",
1514
 
                           access="readwrite")
1515
 
    def Host_dbus_property(self, value=None):
1516
 
        if value is None:       # get
1517
 
            return dbus.String(self.host)
1518
 
        self.host = str(value)
1519
 
    
1520
 
    # Created - property
1521
 
    @dbus_service_property(_interface, signature="s", access="read")
1522
 
    def Created_dbus_property(self):
1523
 
        return datetime_to_dbus(self.created)
1524
 
    
1525
 
    # LastEnabled - property
1526
 
    @dbus_service_property(_interface, signature="s", access="read")
1527
 
    def LastEnabled_dbus_property(self):
1528
 
        return datetime_to_dbus(self.last_enabled)
1529
 
    
1530
 
    # Enabled - property
1531
 
    @dbus_service_property(_interface,
1532
 
                           signature="b",
1533
 
                           access="readwrite")
1534
 
    def Enabled_dbus_property(self, value=None):
1535
 
        if value is None:       # get
1536
 
            return dbus.Boolean(self.enabled)
1537
 
        if value:
1538
 
            self.enable()
1539
 
        else:
1540
 
            self.disable()
1541
 
    
1542
 
    # LastCheckedOK - property
1543
 
    @dbus_service_property(_interface,
1544
 
                           signature="s",
1545
 
                           access="readwrite")
1546
 
    def LastCheckedOK_dbus_property(self, value=None):
1547
 
        if value is not None:
1548
 
            self.checked_ok()
1549
 
            return
1550
 
        return datetime_to_dbus(self.last_checked_ok)
1551
 
    
1552
 
    # LastCheckerStatus - property
1553
 
    @dbus_service_property(_interface, signature="n", access="read")
1554
 
    def LastCheckerStatus_dbus_property(self):
1555
 
        return dbus.Int16(self.last_checker_status)
1556
 
    
1557
 
    # Expires - property
1558
 
    @dbus_service_property(_interface, signature="s", access="read")
1559
 
    def Expires_dbus_property(self):
1560
 
        return datetime_to_dbus(self.expires)
1561
 
    
1562
 
    # LastApprovalRequest - property
1563
 
    @dbus_service_property(_interface, signature="s", access="read")
1564
 
    def LastApprovalRequest_dbus_property(self):
1565
 
        return datetime_to_dbus(self.last_approval_request)
1566
 
    
1567
 
    # Timeout - property
1568
 
    @dbus_service_property(_interface,
1569
 
                           signature="t",
1570
 
                           access="readwrite")
1571
 
    def Timeout_dbus_property(self, value=None):
1572
 
        if value is None:       # get
1573
 
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
1574
 
        old_timeout = self.timeout
1575
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1576
 
        # Reschedule disabling
1577
 
        if self.enabled:
1578
 
            now = datetime.datetime.utcnow()
1579
 
            self.expires += self.timeout - old_timeout
1580
 
            if self.expires <= now:
1581
 
                # The timeout has passed
1582
 
                self.disable()
1583
 
            else:
1584
 
                if (getattr(self, "disable_initiator_tag", None)
1585
 
                    is None):
1586
 
                    return
1587
 
                gobject.source_remove(self.disable_initiator_tag)
1588
 
                self.disable_initiator_tag = gobject.timeout_add(
1589
 
                    int((self.expires - now).total_seconds() * 1000),
1590
 
                    self.disable)
1591
 
    
1592
 
    # ExtendedTimeout - property
1593
 
    @dbus_service_property(_interface,
1594
 
                           signature="t",
1595
 
                           access="readwrite")
1596
 
    def ExtendedTimeout_dbus_property(self, value=None):
1597
 
        if value is None:       # get
1598
 
            return dbus.UInt64(self.extended_timeout.total_seconds()
1599
 
                               * 1000)
1600
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1601
 
    
1602
 
    # Interval - property
1603
 
    @dbus_service_property(_interface,
1604
 
                           signature="t",
1605
 
                           access="readwrite")
1606
 
    def Interval_dbus_property(self, value=None):
1607
 
        if value is None:       # get
1608
 
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1609
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1610
 
        if getattr(self, "checker_initiator_tag", None) is None:
1611
 
            return
1612
 
        if self.enabled:
1613
 
            # Reschedule checker run
1614
 
            gobject.source_remove(self.checker_initiator_tag)
1615
 
            self.checker_initiator_tag = gobject.timeout_add(
1616
 
                value, self.start_checker)
1617
 
            self.start_checker() # Start one now, too
1618
 
    
1619
 
    # Checker - property
1620
 
    @dbus_service_property(_interface,
1621
 
                           signature="s",
1622
 
                           access="readwrite")
1623
 
    def Checker_dbus_property(self, value=None):
1624
 
        if value is None:       # get
1625
 
            return dbus.String(self.checker_command)
1626
 
        self.checker_command = str(value)
1627
 
    
1628
 
    # CheckerRunning - property
1629
 
    @dbus_service_property(_interface,
1630
 
                           signature="b",
1631
 
                           access="readwrite")
1632
 
    def CheckerRunning_dbus_property(self, value=None):
1633
 
        if value is None:       # get
1634
 
            return dbus.Boolean(self.checker is not None)
1635
 
        if value:
1636
 
            self.start_checker()
1637
 
        else:
1638
 
            self.stop_checker()
1639
 
    
1640
 
    # ObjectPath - property
1641
 
    @dbus_service_property(_interface, signature="o", access="read")
1642
 
    def ObjectPath_dbus_property(self):
1643
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1644
 
    
1645
 
    # Secret = property
1646
 
    @dbus_service_property(_interface,
1647
 
                           signature="ay",
1648
 
                           access="write",
1649
 
                           byte_arrays=True)
1650
 
    def Secret_dbus_property(self, value):
1651
 
        self.secret = bytes(value)
1652
 
    
1653
 
    del _interface
1654
 
 
1655
 
 
1656
 
class ProxyClient(object):
1657
 
    def __init__(self, child_pipe, fpr, address):
1658
 
        self._pipe = child_pipe
1659
 
        self._pipe.send(('init', fpr, address))
1660
 
        if not self._pipe.recv():
1661
 
            raise KeyError()
1662
 
    
1663
 
    def __getattribute__(self, name):
1664
 
        if name == '_pipe':
1665
 
            return super(ProxyClient, self).__getattribute__(name)
1666
 
        self._pipe.send(('getattr', name))
1667
 
        data = self._pipe.recv()
1668
 
        if data[0] == 'data':
1669
 
            return data[1]
1670
 
        if data[0] == 'function':
1671
 
            
1672
 
            def func(*args, **kwargs):
1673
 
                self._pipe.send(('funcall', name, args, kwargs))
1674
 
                return self._pipe.recv()[1]
1675
 
            
1676
 
            return func
1677
 
    
1678
 
    def __setattr__(self, name, value):
1679
 
        if name == '_pipe':
1680
 
            return super(ProxyClient, self).__setattr__(name, value)
1681
 
        self._pipe.send(('setattr', name, value))
1682
 
 
1683
 
 
1684
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1685
 
    """A class to handle client connections.
1686
 
    
1687
 
    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.
1688
364
    Note: This will run in its own forked process."""
1689
365
    
1690
366
    def handle(self):
1691
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1692
 
            logger.info("TCP connection from: %s",
1693
 
                        str(self.client_address))
1694
 
            logger.debug("Pipe FD: %d",
1695
 
                         self.server.child_pipe.fileno())
1696
 
            
1697
 
            session = gnutls.connection.ClientSession(
1698
 
                self.request, gnutls.connection .X509Credentials())
1699
 
            
1700
 
            # Note: gnutls.connection.X509Credentials is really a
1701
 
            # generic GnuTLS certificate credentials object so long as
1702
 
            # no X.509 keys are added to it.  Therefore, we can use it
1703
 
            # here despite using OpenPGP certificates.
1704
 
            
1705
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1706
 
            #                      "+AES-256-CBC", "+SHA1",
1707
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1708
 
            #                      "+DHE-DSS"))
1709
 
            # Use a fallback default, since this MUST be set.
1710
 
            priority = self.server.gnutls_priority
1711
 
            if priority is None:
1712
 
                priority = "NORMAL"
1713
 
            gnutls.library.functions.gnutls_priority_set_direct(
1714
 
                session._c_object, priority, None)
1715
 
            
1716
 
            # Start communication using the Mandos protocol
1717
 
            # Get protocol number
1718
 
            line = self.request.makefile().readline()
1719
 
            logger.debug("Protocol version: %r", line)
1720
 
            try:
1721
 
                if int(line.strip().split()[0]) > 1:
1722
 
                    raise RuntimeError(line)
1723
 
            except (ValueError, IndexError, RuntimeError) as error:
1724
 
                logger.error("Unknown protocol version: %s", error)
1725
 
                return
1726
 
            
1727
 
            # Start GnuTLS connection
1728
 
            try:
1729
 
                session.handshake()
1730
 
            except gnutls.errors.GNUTLSError as error:
1731
 
                logger.warning("Handshake failed: %s", error)
1732
 
                # Do not run session.bye() here: the session is not
1733
 
                # established.  Just abandon the request.
1734
 
                return
1735
 
            logger.debug("Handshake succeeded")
1736
 
            
1737
 
            approval_required = False
1738
 
            try:
1739
 
                try:
1740
 
                    fpr = self.fingerprint(
1741
 
                        self.peer_certificate(session))
1742
 
                except (TypeError,
1743
 
                        gnutls.errors.GNUTLSError) as error:
1744
 
                    logger.warning("Bad certificate: %s", error)
1745
 
                    return
1746
 
                logger.debug("Fingerprint: %s", fpr)
1747
 
                
1748
 
                try:
1749
 
                    client = ProxyClient(child_pipe, fpr,
1750
 
                                         self.client_address)
1751
 
                except KeyError:
1752
 
                    return
1753
 
                
1754
 
                if client.approval_delay:
1755
 
                    delay = client.approval_delay
1756
 
                    client.approvals_pending += 1
1757
 
                    approval_required = True
1758
 
                
1759
 
                while True:
1760
 
                    if not client.enabled:
1761
 
                        logger.info("Client %s is disabled",
1762
 
                                    client.name)
1763
 
                        if self.server.use_dbus:
1764
 
                            # Emit D-Bus signal
1765
 
                            client.Rejected("Disabled")
1766
 
                        return
1767
 
                    
1768
 
                    if client.approved or not client.approval_delay:
1769
 
                        #We are approved or approval is disabled
1770
 
                        break
1771
 
                    elif client.approved is None:
1772
 
                        logger.info("Client %s needs approval",
1773
 
                                    client.name)
1774
 
                        if self.server.use_dbus:
1775
 
                            # Emit D-Bus signal
1776
 
                            client.NeedApproval(
1777
 
                                client.approval_delay.total_seconds()
1778
 
                                * 1000, client.approved_by_default)
1779
 
                    else:
1780
 
                        logger.warning("Client %s was not approved",
1781
 
                                       client.name)
1782
 
                        if self.server.use_dbus:
1783
 
                            # Emit D-Bus signal
1784
 
                            client.Rejected("Denied")
1785
 
                        return
1786
 
                    
1787
 
                    #wait until timeout or approved
1788
 
                    time = datetime.datetime.now()
1789
 
                    client.changedstate.acquire()
1790
 
                    client.changedstate.wait(delay.total_seconds())
1791
 
                    client.changedstate.release()
1792
 
                    time2 = datetime.datetime.now()
1793
 
                    if (time2 - time) >= delay:
1794
 
                        if not client.approved_by_default:
1795
 
                            logger.warning("Client %s timed out while"
1796
 
                                           " waiting for approval",
1797
 
                                           client.name)
1798
 
                            if self.server.use_dbus:
1799
 
                                # Emit D-Bus signal
1800
 
                                client.Rejected("Approval timed out")
1801
 
                            return
1802
 
                        else:
1803
 
                            break
1804
 
                    else:
1805
 
                        delay -= time2 - time
1806
 
                
1807
 
                sent_size = 0
1808
 
                while sent_size < len(client.secret):
1809
 
                    try:
1810
 
                        sent = session.send(client.secret[sent_size:])
1811
 
                    except gnutls.errors.GNUTLSError as error:
1812
 
                        logger.warning("gnutls send failed",
1813
 
                                       exc_info=error)
1814
 
                        return
1815
 
                    logger.debug("Sent: %d, remaining: %d", sent,
1816
 
                                 len(client.secret) - (sent_size
1817
 
                                                       + sent))
1818
 
                    sent_size += sent
1819
 
                
1820
 
                logger.info("Sending secret to %s", client.name)
1821
 
                # bump the timeout using extended_timeout
1822
 
                client.bump_timeout(client.extended_timeout)
1823
 
                if self.server.use_dbus:
1824
 
                    # Emit D-Bus signal
1825
 
                    client.GotSecret()
1826
 
            
1827
 
            finally:
1828
 
                if approval_required:
1829
 
                    client.approvals_pending -= 1
1830
 
                try:
1831
 
                    session.bye()
1832
 
                except gnutls.errors.GNUTLSError as error:
1833
 
                    logger.warning("GnuTLS bye failed",
1834
 
                                   exc_info=error)
1835
 
    
1836
 
    @staticmethod
1837
 
    def peer_certificate(session):
1838
 
        "Return the peer's OpenPGP certificate as a bytestring"
1839
 
        # If not an OpenPGP certificate...
1840
 
        if (gnutls.library.functions.gnutls_certificate_type_get(
1841
 
                session._c_object)
1842
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1843
 
            # ...do the normal thing
1844
 
            return session.peer_certificate
1845
 
        list_size = ctypes.c_uint(1)
1846
 
        cert_list = (gnutls.library.functions
1847
 
                     .gnutls_certificate_get_peers
1848
 
                     (session._c_object, ctypes.byref(list_size)))
1849
 
        if not bool(cert_list) and list_size.value != 0:
1850
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1851
 
                                            " certificate")
1852
 
        if list_size.value == 0:
1853
 
            return None
1854
 
        cert = cert_list[0]
1855
 
        return ctypes.string_at(cert.data, cert.size)
1856
 
    
1857
 
    @staticmethod
1858
 
    def fingerprint(openpgp):
1859
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1860
 
        # New GnuTLS "datum" with the OpenPGP public key
1861
 
        datum = gnutls.library.types.gnutls_datum_t(
1862
 
            ctypes.cast(ctypes.c_char_p(openpgp),
1863
 
                        ctypes.POINTER(ctypes.c_ubyte)),
1864
 
            ctypes.c_uint(len(openpgp)))
1865
 
        # New empty GnuTLS certificate
1866
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1867
 
        gnutls.library.functions.gnutls_openpgp_crt_init(
1868
 
            ctypes.byref(crt))
1869
 
        # Import the OpenPGP public key into the certificate
1870
 
        gnutls.library.functions.gnutls_openpgp_crt_import(
1871
 
            crt, ctypes.byref(datum),
1872
 
            gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
1873
 
        # Verify the self signature in the key
1874
 
        crtverify = ctypes.c_uint()
1875
 
        gnutls.library.functions.gnutls_openpgp_crt_verify_self(
1876
 
            crt, 0, ctypes.byref(crtverify))
1877
 
        if crtverify.value != 0:
1878
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1879
 
            raise gnutls.errors.CertificateSecurityError(
1880
 
                "Verify failed")
1881
 
        # New buffer for the fingerprint
1882
 
        buf = ctypes.create_string_buffer(20)
1883
 
        buf_len = ctypes.c_size_t()
1884
 
        # Get the fingerprint from the certificate into the buffer
1885
 
        gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(
1886
 
            crt, ctypes.byref(buf), ctypes.byref(buf_len))
1887
 
        # Deinit the certificate
1888
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1889
 
        # Convert the buffer to a Python bytestring
1890
 
        fpr = ctypes.string_at(buf, buf_len.value)
1891
 
        # Convert the bytestring to hexadecimal notation
1892
 
        hex_fpr = binascii.hexlify(fpr).upper()
1893
 
        return hex_fpr
1894
 
 
1895
 
 
1896
 
class MultiprocessingMixIn(object):
1897
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1898
 
    
1899
 
    def sub_process_main(self, request, address):
1900
 
        try:
1901
 
            self.finish_request(request, address)
1902
 
        except Exception:
1903
 
            self.handle_error(request, address)
1904
 
        self.close_request(request)
1905
 
    
1906
 
    def process_request(self, request, address):
1907
 
        """Start a new process to process the request."""
1908
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1909
 
                                       args = (request, address))
1910
 
        proc.start()
1911
 
        return proc
1912
 
 
1913
 
 
1914
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1915
 
    """ adds a pipe to the MixIn """
1916
 
    
1917
 
    def process_request(self, request, client_address):
1918
 
        """Overrides and wraps the original process_request().
1919
 
        
1920
 
        This function creates a new pipe in self.pipe
1921
 
        """
1922
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1923
 
        
1924
 
        proc = MultiprocessingMixIn.process_request(self, request,
1925
 
                                                    client_address)
1926
 
        self.child_pipe.close()
1927
 
        self.add_pipe(parent_pipe, proc)
1928
 
    
1929
 
    def add_pipe(self, parent_pipe, proc):
1930
 
        """Dummy function; override as necessary"""
1931
 
        raise NotImplementedError()
1932
 
 
1933
 
 
1934
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1935
 
                     socketserver.TCPServer, object):
1936
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1937
 
    
 
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.
1938
425
    Attributes:
1939
 
        enabled:        Boolean; whether this server is activated yet
1940
 
        interface:      None or a network interface name (string)
1941
 
        use_ipv6:       Boolean; to use IPv6 or not
 
426
        options:        Command line options
 
427
        clients:        Set() of Client objects
1942
428
    """
1943
 
    
1944
 
    def __init__(self, server_address, RequestHandlerClass,
1945
 
                 interface=None,
1946
 
                 use_ipv6=True,
1947
 
                 socketfd=None):
1948
 
        """If socketfd is set, use that file descriptor instead of
1949
 
        creating a new one with socket.socket().
1950
 
        """
1951
 
        self.interface = interface
1952
 
        if use_ipv6:
1953
 
            self.address_family = socket.AF_INET6
1954
 
        if socketfd is not None:
1955
 
            # Save the file descriptor
1956
 
            self.socketfd = socketfd
1957
 
            # Save the original socket.socket() function
1958
 
            self.socket_socket = socket.socket
1959
 
            # To implement --socket, we monkey patch socket.socket.
1960
 
            # 
1961
 
            # (When socketserver.TCPServer is a new-style class, we
1962
 
            # could make self.socket into a property instead of monkey
1963
 
            # patching socket.socket.)
1964
 
            # 
1965
 
            # Create a one-time-only replacement for socket.socket()
1966
 
            @functools.wraps(socket.socket)
1967
 
            def socket_wrapper(*args, **kwargs):
1968
 
                # Restore original function so subsequent calls are
1969
 
                # not affected.
1970
 
                socket.socket = self.socket_socket
1971
 
                del self.socket_socket
1972
 
                # This time only, return a new socket object from the
1973
 
                # saved file descriptor.
1974
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1975
 
            # Replace socket.socket() function with wrapper
1976
 
            socket.socket = socket_wrapper
1977
 
        # The socketserver.TCPServer.__init__ will call
1978
 
        # socket.socket(), which might be our replacement,
1979
 
        # socket_wrapper(), if socketfd was set.
1980
 
        socketserver.TCPServer.__init__(self, server_address,
1981
 
                                        RequestHandlerClass)
1982
 
    
 
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)
1983
438
    def server_bind(self):
1984
439
        """This overrides the normal server_bind() function
1985
440
        to bind to an interface if one was specified, and also NOT to
1986
441
        bind to an address or port if they were not specified."""
1987
 
        if self.interface is not None:
1988
 
            if SO_BINDTODEVICE is None:
1989
 
                logger.error("SO_BINDTODEVICE does not exist;"
1990
 
                             " cannot bind to interface %s",
1991
 
                             self.interface)
1992
 
            else:
1993
 
                try:
1994
 
                    self.socket.setsockopt(
1995
 
                        socket.SOL_SOCKET, SO_BINDTODEVICE,
1996
 
                        (self.interface + "\0").encode("utf-8"))
1997
 
                except socket.error as error:
1998
 
                    if error.errno == errno.EPERM:
1999
 
                        logger.error("No permission to bind to"
2000
 
                                     " interface %s", self.interface)
2001
 
                    elif error.errno == errno.ENOPROTOOPT:
2002
 
                        logger.error("SO_BINDTODEVICE not available;"
2003
 
                                     " cannot bind to interface %s",
2004
 
                                     self.interface)
2005
 
                    elif error.errno == errno.ENODEV:
2006
 
                        logger.error("Interface %s does not exist,"
2007
 
                                     " cannot bind", self.interface)
2008
 
                    else:
2009
 
                        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
2010
457
        # Only bind(2) the socket if we really need to.
2011
458
        if self.server_address[0] or self.server_address[1]:
2012
459
            if not self.server_address[0]:
2013
 
                if self.address_family == socket.AF_INET6:
2014
 
                    any_address = "::" # in6addr_any
2015
 
                else:
2016
 
                    any_address = "0.0.0.0" # INADDR_ANY
2017
 
                self.server_address = (any_address,
 
460
                in6addr_any = "::"
 
461
                self.server_address = (in6addr_any,
2018
462
                                       self.server_address[1])
2019
 
            elif not self.server_address[1]:
2020
 
                self.server_address = (self.server_address[0], 0)
2021
 
#                 if self.interface:
2022
 
#                     self.server_address = (self.server_address[0],
2023
 
#                                            0, # port
2024
 
#                                            0, # flowinfo
2025
 
#                                            if_nametoindex
2026
 
#                                            (self.interface))
2027
 
            return socketserver.TCPServer.server_bind(self)
2028
 
 
2029
 
 
2030
 
class MandosServer(IPv6_TCPServer):
2031
 
    """Mandos server.
2032
 
    
2033
 
    Attributes:
2034
 
        clients:        set of Client objects
2035
 
        gnutls_priority GnuTLS priority string
2036
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2037
 
    
2038
 
    Assumes a gobject.MainLoop event loop.
2039
 
    """
2040
 
    
2041
 
    def __init__(self, server_address, RequestHandlerClass,
2042
 
                 interface=None,
2043
 
                 use_ipv6=True,
2044
 
                 clients=None,
2045
 
                 gnutls_priority=None,
2046
 
                 use_dbus=True,
2047
 
                 socketfd=None):
2048
 
        self.enabled = False
2049
 
        self.clients = clients
2050
 
        if self.clients is None:
2051
 
            self.clients = {}
2052
 
        self.use_dbus = use_dbus
2053
 
        self.gnutls_priority = gnutls_priority
2054
 
        IPv6_TCPServer.__init__(self, server_address,
2055
 
                                RequestHandlerClass,
2056
 
                                interface = interface,
2057
 
                                use_ipv6 = use_ipv6,
2058
 
                                socketfd = socketfd)
2059
 
    
2060
 
    def server_activate(self):
2061
 
        if self.enabled:
2062
 
            return socketserver.TCPServer.server_activate(self)
2063
 
    
2064
 
    def enable(self):
2065
 
        self.enabled = True
2066
 
    
2067
 
    def add_pipe(self, parent_pipe, proc):
2068
 
        # Call "handle_ipc" for both data and EOF events
2069
 
        gobject.io_add_watch(
2070
 
            parent_pipe.fileno(),
2071
 
            gobject.IO_IN | gobject.IO_HUP,
2072
 
            functools.partial(self.handle_ipc,
2073
 
                              parent_pipe = parent_pipe,
2074
 
                              proc = proc))
2075
 
    
2076
 
    def handle_ipc(self, source, condition,
2077
 
                   parent_pipe=None,
2078
 
                   proc = None,
2079
 
                   client_object=None):
2080
 
        # error, or the other end of multiprocessing.Pipe has closed
2081
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2082
 
            # Wait for other process to exit
2083
 
            proc.join()
2084
 
            return False
2085
 
        
2086
 
        # Read a request from the child
2087
 
        request = parent_pipe.recv()
2088
 
        command = request[0]
2089
 
        
2090
 
        if command == 'init':
2091
 
            fpr = request[1]
2092
 
            address = request[2]
2093
 
            
2094
 
            for c in self.clients.itervalues():
2095
 
                if c.fingerprint == fpr:
2096
 
                    client = c
2097
 
                    break
2098
 
            else:
2099
 
                logger.info("Client not found for fingerprint: %s, ad"
2100
 
                            "dress: %s", fpr, address)
2101
 
                if self.use_dbus:
2102
 
                    # Emit D-Bus signal
2103
 
                    mandos_dbus_service.ClientNotFound(fpr,
2104
 
                                                       address[0])
2105
 
                parent_pipe.send(False)
2106
 
                return False
2107
 
            
2108
 
            gobject.io_add_watch(
2109
 
                parent_pipe.fileno(),
2110
 
                gobject.IO_IN | gobject.IO_HUP,
2111
 
                functools.partial(self.handle_ipc,
2112
 
                                  parent_pipe = parent_pipe,
2113
 
                                  proc = proc,
2114
 
                                  client_object = client))
2115
 
            parent_pipe.send(True)
2116
 
            # remove the old hook in favor of the new above hook on
2117
 
            # same fileno
2118
 
            return False
2119
 
        if command == 'funcall':
2120
 
            funcname = request[1]
2121
 
            args = request[2]
2122
 
            kwargs = request[3]
2123
 
            
2124
 
            parent_pipe.send(('data', getattr(client_object,
2125
 
                                              funcname)(*args,
2126
 
                                                        **kwargs)))
2127
 
        
2128
 
        if command == 'getattr':
2129
 
            attrname = request[1]
2130
 
            if callable(client_object.__getattribute__(attrname)):
2131
 
                parent_pipe.send(('function', ))
2132
 
            else:
2133
 
                parent_pipe.send((
2134
 
                    'data', client_object.__getattribute__(attrname)))
2135
 
        
2136
 
        if command == 'setattr':
2137
 
            attrname = request[1]
2138
 
            value = request[2]
2139
 
            setattr(client_object, attrname, value)
2140
 
        
2141
 
        return True
2142
 
 
2143
 
 
2144
 
def rfc3339_duration_to_delta(duration):
2145
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2146
 
    
2147
 
    >>> rfc3339_duration_to_delta("P7D")
2148
 
    datetime.timedelta(7)
2149
 
    >>> rfc3339_duration_to_delta("PT60S")
2150
 
    datetime.timedelta(0, 60)
2151
 
    >>> rfc3339_duration_to_delta("PT60M")
2152
 
    datetime.timedelta(0, 3600)
2153
 
    >>> rfc3339_duration_to_delta("PT24H")
2154
 
    datetime.timedelta(1)
2155
 
    >>> rfc3339_duration_to_delta("P1W")
2156
 
    datetime.timedelta(7)
2157
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2158
 
    datetime.timedelta(0, 330)
2159
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2160
 
    datetime.timedelta(1, 200)
2161
 
    """
2162
 
    
2163
 
    # Parsing an RFC 3339 duration with regular expressions is not
2164
 
    # possible - there would have to be multiple places for the same
2165
 
    # values, like seconds.  The current code, while more esoteric, is
2166
 
    # cleaner without depending on a parsing library.  If Python had a
2167
 
    # built-in library for parsing we would use it, but we'd like to
2168
 
    # avoid excessive use of external libraries.
2169
 
    
2170
 
    # New type for defining tokens, syntax, and semantics all-in-one
2171
 
    Token = collections.namedtuple("Token",
2172
 
                                   ("regexp", # To match token; if
2173
 
                                              # "value" is not None,
2174
 
                                              # must have a "group"
2175
 
                                              # containing digits
2176
 
                                    "value",  # datetime.timedelta or
2177
 
                                              # None
2178
 
                                    "followers")) # Tokens valid after
2179
 
                                                  # this token
2180
 
    Token = collections.namedtuple("Token", (
2181
 
        "regexp",  # To match token; if "value" is not None, must have
2182
 
                   # a "group" containing digits
2183
 
        "value",   # datetime.timedelta or None
2184
 
        "followers"))           # Tokens valid after this token
2185
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2186
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2187
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2188
 
    token_second = Token(re.compile(r"(\d+)S"),
2189
 
                         datetime.timedelta(seconds=1),
2190
 
                         frozenset((token_end, )))
2191
 
    token_minute = Token(re.compile(r"(\d+)M"),
2192
 
                         datetime.timedelta(minutes=1),
2193
 
                         frozenset((token_second, token_end)))
2194
 
    token_hour = Token(re.compile(r"(\d+)H"),
2195
 
                       datetime.timedelta(hours=1),
2196
 
                       frozenset((token_minute, token_end)))
2197
 
    token_time = Token(re.compile(r"T"),
2198
 
                       None,
2199
 
                       frozenset((token_hour, token_minute,
2200
 
                                  token_second)))
2201
 
    token_day = Token(re.compile(r"(\d+)D"),
2202
 
                      datetime.timedelta(days=1),
2203
 
                      frozenset((token_time, token_end)))
2204
 
    token_month = Token(re.compile(r"(\d+)M"),
2205
 
                        datetime.timedelta(weeks=4),
2206
 
                        frozenset((token_day, token_end)))
2207
 
    token_year = Token(re.compile(r"(\d+)Y"),
2208
 
                       datetime.timedelta(weeks=52),
2209
 
                       frozenset((token_month, token_end)))
2210
 
    token_week = Token(re.compile(r"(\d+)W"),
2211
 
                       datetime.timedelta(weeks=1),
2212
 
                       frozenset((token_end, )))
2213
 
    token_duration = Token(re.compile(r"P"), None,
2214
 
                           frozenset((token_year, token_month,
2215
 
                                      token_day, token_time,
2216
 
                                      token_week)))
2217
 
    # Define starting values
2218
 
    value = datetime.timedelta() # Value so far
2219
 
    found_token = None
2220
 
    followers = frozenset((token_duration,)) # Following valid tokens
2221
 
    s = duration                # String left to parse
2222
 
    # Loop until end token is found
2223
 
    while found_token is not token_end:
2224
 
        # Search for any currently valid tokens
2225
 
        for token in followers:
2226
 
            match = token.regexp.match(s)
2227
 
            if match is not None:
2228
 
                # Token found
2229
 
                if token.value is not None:
2230
 
                    # Value found, parse digits
2231
 
                    factor = int(match.group(1), 10)
2232
 
                    # Add to value so far
2233
 
                    value += factor * token.value
2234
 
                # Strip token from string
2235
 
                s = token.regexp.sub("", s, 1)
2236
 
                # Go to found token
2237
 
                found_token = token
2238
 
                # Set valid next tokens
2239
 
                followers = found_token.followers
2240
 
                break
2241
 
        else:
2242
 
            # No currently valid tokens were found
2243
 
            raise ValueError("Invalid RFC 3339 duration")
2244
 
    # End token found
2245
 
    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()
2246
467
 
2247
468
 
2248
469
def string_to_delta(interval):
2249
470
    """Parse a string and return a datetime.timedelta
2250
 
    
 
471
 
2251
472
    >>> string_to_delta('7d')
2252
473
    datetime.timedelta(7)
2253
474
    >>> string_to_delta('60s')
2256
477
    datetime.timedelta(0, 3600)
2257
478
    >>> string_to_delta('24h')
2258
479
    datetime.timedelta(1)
2259
 
    >>> string_to_delta('1w')
 
480
    >>> string_to_delta(u'1w')
2260
481
    datetime.timedelta(7)
2261
 
    >>> string_to_delta('5m 30s')
2262
 
    datetime.timedelta(0, 330)
2263
482
    """
2264
 
    
2265
 
    try:
2266
 
        return rfc3339_duration_to_delta(interval)
2267
 
    except ValueError:
2268
 
        pass
2269
 
    
2270
 
    timevalue = datetime.timedelta(0)
2271
 
    for s in interval.split():
2272
 
        try:
2273
 
            suffix = s[-1]
2274
 
            value = int(s[:-1])
2275
 
            if suffix == "d":
2276
 
                delta = datetime.timedelta(value)
2277
 
            elif suffix == "s":
2278
 
                delta = datetime.timedelta(0, value)
2279
 
            elif suffix == "m":
2280
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2281
 
            elif suffix == "h":
2282
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2283
 
            elif suffix == "w":
2284
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2285
 
            else:
2286
 
                raise ValueError("Unknown suffix {!r}".format(suffix))
2287
 
        except IndexError as e:
2288
 
            raise ValueError(*(e.args))
2289
 
        timevalue += delta
2290
 
    return timevalue
2291
 
 
2292
 
 
2293
 
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):
2294
593
    """See daemon(3).  Standard BSD Unix function.
2295
 
    
2296
594
    This should really exist as os.daemon, but it doesn't (yet)."""
2297
595
    if os.fork():
2298
596
        sys.exit()
2299
597
    os.setsid()
2300
598
    if not nochdir:
2301
599
        os.chdir("/")
2302
 
    if os.fork():
2303
 
        sys.exit()
2304
600
    if not noclose:
2305
601
        # Close all standard open file descriptors
2306
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
602
        null = os.open("/dev/null", os.O_NOCTTY | os.O_RDWR)
2307
603
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2308
604
            raise OSError(errno.ENODEV,
2309
 
                          "{} not a character device"
2310
 
                          .format(os.devnull))
 
605
                          "/dev/null not a character device")
2311
606
        os.dup2(null, sys.stdin.fileno())
2312
607
        os.dup2(null, sys.stdout.fileno())
2313
608
        os.dup2(null, sys.stderr.fileno())
2315
610
            os.close(null)
2316
611
 
2317
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
 
2318
622
def main():
2319
 
    
2320
 
    ##################################################################
2321
 
    # Parsing of options, both command line and config file
2322
 
    
2323
 
    parser = argparse.ArgumentParser()
2324
 
    parser.add_argument("-v", "--version", action="version",
2325
 
                        version = "%(prog)s {}".format(version),
2326
 
                        help="show version number and exit")
2327
 
    parser.add_argument("-i", "--interface", metavar="IF",
2328
 
                        help="Bind to interface IF")
2329
 
    parser.add_argument("-a", "--address",
2330
 
                        help="Address to listen for requests on")
2331
 
    parser.add_argument("-p", "--port", type=int,
2332
 
                        help="Port number to receive requests on")
2333
 
    parser.add_argument("--check", action="store_true",
2334
 
                        help="Run self-test")
2335
 
    parser.add_argument("--debug", action="store_true",
2336
 
                        help="Debug mode; run in foreground and log"
2337
 
                        " to terminal", default=None)
2338
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2339
 
                        help="Debug level for stdout output")
2340
 
    parser.add_argument("--priority", help="GnuTLS"
2341
 
                        " priority string (see GnuTLS documentation)")
2342
 
    parser.add_argument("--servicename",
2343
 
                        metavar="NAME", help="Zeroconf service name")
2344
 
    parser.add_argument("--configdir",
2345
 
                        default="/etc/mandos", metavar="DIR",
2346
 
                        help="Directory to search for configuration"
2347
 
                        " files")
2348
 
    parser.add_argument("--no-dbus", action="store_false",
2349
 
                        dest="use_dbus", help="Do not provide D-Bus"
2350
 
                        " system bus interface", default=None)
2351
 
    parser.add_argument("--no-ipv6", action="store_false",
2352
 
                        dest="use_ipv6", help="Do not use IPv6",
2353
 
                        default=None)
2354
 
    parser.add_argument("--no-restore", action="store_false",
2355
 
                        dest="restore", help="Do not restore stored"
2356
 
                        " state", default=None)
2357
 
    parser.add_argument("--socket", type=int,
2358
 
                        help="Specify a file descriptor to a network"
2359
 
                        " socket to use instead of creating one")
2360
 
    parser.add_argument("--statedir", metavar="DIR",
2361
 
                        help="Directory to save/restore state in")
2362
 
    parser.add_argument("--foreground", action="store_true",
2363
 
                        help="Run in foreground", default=None)
2364
 
    parser.add_argument("--no-zeroconf", action="store_false",
2365
 
                        dest="zeroconf", help="Do not use Zeroconf",
2366
 
                        default=None)
2367
 
    
2368
 
    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()
2369
647
    
2370
648
    if options.check:
2371
649
        import doctest
2372
 
        fail_count, test_count = doctest.testmod()
2373
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2374
 
    
2375
 
    # Default values for config file for server-global settings
2376
 
    server_defaults = { "interface": "",
2377
 
                        "address": "",
2378
 
                        "port": "",
2379
 
                        "debug": "False",
2380
 
                        "priority":
2381
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2382
 
                        ":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
2383
 
                        "servicename": "Mandos",
2384
 
                        "use_dbus": "True",
2385
 
                        "use_ipv6": "True",
2386
 
                        "debuglevel": "",
2387
 
                        "restore": "True",
2388
 
                        "socket": "",
2389
 
                        "statedir": "/var/lib/mandos",
2390
 
                        "foreground": "False",
2391
 
                        "zeroconf": "True",
2392
 
                    }
2393
 
    
2394
 
    # Parse config file for server-global settings
2395
 
    server_config = configparser.SafeConfigParser(server_defaults)
2396
 
    del server_defaults
2397
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2398
 
    # Convert the SafeConfigParser object to a dict
2399
 
    server_settings = server_config.defaults()
2400
 
    # Use the appropriate methods on the non-string config options
2401
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2402
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2403
 
                                                           option)
2404
 
    if server_settings["port"]:
2405
 
        server_settings["port"] = server_config.getint("DEFAULT",
2406
 
                                                       "port")
2407
 
    if server_settings["socket"]:
2408
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2409
 
                                                         "socket")
2410
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2411
 
        # over with an opened os.devnull.  But we don't want this to
2412
 
        # happen with a supplied network socket.
2413
 
        if 0 <= server_settings["socket"] <= 2:
2414
 
            server_settings["socket"] = os.dup(server_settings
2415
 
                                               ["socket"])
2416
 
    del server_config
2417
 
    
2418
 
    # Override the settings from the config file with command line
2419
 
    # options, if set.
2420
 
    for option in ("interface", "address", "port", "debug",
2421
 
                   "priority", "servicename", "configdir", "use_dbus",
2422
 
                   "use_ipv6", "debuglevel", "restore", "statedir",
2423
 
                   "socket", "foreground", "zeroconf"):
2424
 
        value = getattr(options, option)
2425
 
        if value is not None:
2426
 
            server_settings[option] = value
2427
 
    del options
2428
 
    # Force all strings to be unicode
2429
 
    for option in server_settings.keys():
2430
 
        if isinstance(server_settings[option], bytes):
2431
 
            server_settings[option] = (server_settings[option]
2432
 
                                       .decode("utf-8"))
2433
 
    # Force all boolean options to be boolean
2434
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2435
 
                   "foreground", "zeroconf"):
2436
 
        server_settings[option] = bool(server_settings[option])
2437
 
    # Debug implies foreground
2438
 
    if server_settings["debug"]:
2439
 
        server_settings["foreground"] = True
2440
 
    # Now we have our good server settings in "server_settings"
2441
 
    
2442
 
    ##################################################################
2443
 
    
2444
 
    if (not server_settings["zeroconf"]
2445
 
        and not (server_settings["port"]
2446
 
                 or server_settings["socket"] != "")):
2447
 
        parser.error("Needs port or socket to work without Zeroconf")
2448
 
    
2449
 
    # For convenience
2450
 
    debug = server_settings["debug"]
2451
 
    debuglevel = server_settings["debuglevel"]
2452
 
    use_dbus = server_settings["use_dbus"]
2453
 
    use_ipv6 = server_settings["use_ipv6"]
2454
 
    stored_state_path = os.path.join(server_settings["statedir"],
2455
 
                                     stored_state_file)
2456
 
    foreground = server_settings["foreground"]
2457
 
    zeroconf = server_settings["zeroconf"]
2458
 
    
2459
 
    if debug:
2460
 
        initlogger(debug, logging.DEBUG)
2461
 
    else:
2462
 
        if not debuglevel:
2463
 
            initlogger(debug)
2464
 
        else:
2465
 
            level = getattr(logging, debuglevel.upper())
2466
 
            initlogger(debug, level)
2467
 
    
2468
 
    if server_settings["servicename"] != "Mandos":
2469
 
        syslogger.setFormatter(
2470
 
            logging.Formatter('Mandos ({}) [%(process)d]:'
2471
 
                              ' %(levelname)s: %(message)s'.format(
2472
 
                                  server_settings["servicename"])))
2473
 
    
2474
 
    # Parse config file with clients
2475
 
    client_config = configparser.SafeConfigParser(Client
2476
 
                                                  .client_defaults)
2477
 
    client_config.read(os.path.join(server_settings["configdir"],
2478
 
                                    "clients.conf"))
2479
 
    
2480
 
    global mandos_dbus_service
2481
 
    mandos_dbus_service = None
2482
 
    
2483
 
    socketfd = None
2484
 
    if server_settings["socket"] != "":
2485
 
        socketfd = server_settings["socket"]
2486
 
    tcp_server = MandosServer(
2487
 
        (server_settings["address"], server_settings["port"]),
2488
 
        ClientHandler,
2489
 
        interface=(server_settings["interface"] or None),
2490
 
        use_ipv6=use_ipv6,
2491
 
        gnutls_priority=server_settings["priority"],
2492
 
        use_dbus=use_dbus,
2493
 
        socketfd=socketfd)
2494
 
    if not foreground:
2495
 
        pidfilename = "/run/mandos.pid"
2496
 
        if not os.path.isdir("/run/."):
2497
 
            pidfilename = "/var/run/mandos.pid"
2498
 
        pidfile = None
2499
 
        try:
2500
 
            pidfile = open(pidfilename, "w")
2501
 
        except IOError as e:
2502
 
            logger.error("Could not open file %r", pidfilename,
2503
 
                         exc_info=e)
2504
 
    
2505
 
    for name in ("_mandos", "mandos", "nobody"):
2506
 
        try:
2507
 
            uid = pwd.getpwnam(name).pw_uid
2508
 
            gid = pwd.getpwnam(name).pw_gid
2509
 
            break
2510
 
        except KeyError:
2511
 
            continue
2512
 
    else:
2513
 
        uid = 65534
2514
 
        gid = 65534
2515
 
    try:
2516
 
        os.setgid(gid)
2517
 
        os.setuid(uid)
2518
 
    except OSError as error:
2519
 
        if error.errno != errno.EPERM:
2520
 
            raise
2521
 
    
2522
 
    if debug:
2523
 
        # Enable all possible GnuTLS debugging
2524
 
        
2525
 
        # "Use a log level over 10 to enable all debugging options."
2526
 
        # - GnuTLS manual
2527
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2528
 
        
2529
 
        @gnutls.library.types.gnutls_log_func
2530
 
        def debug_gnutls(level, string):
2531
 
            logger.debug("GnuTLS: %s", string[:-1])
2532
 
        
2533
 
        gnutls.library.functions.gnutls_global_set_log_function(
2534
 
            debug_gnutls)
2535
 
        
2536
 
        # Redirect stdin so all checkers get /dev/null
2537
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2538
 
        os.dup2(null, sys.stdin.fileno())
2539
 
        if null > 2:
2540
 
            os.close(null)
2541
 
    
2542
 
    # Need to fork before connecting to D-Bus
2543
 
    if not foreground:
2544
 
        # Close all input and output, do double fork, etc.
2545
 
        daemon()
2546
 
    
2547
 
    # multiprocessing will use threads, so before we use gobject we
2548
 
    # need to inform gobject that threads will be used.
2549
 
    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;
2550
664
    
2551
665
    global main_loop
 
666
    global bus
 
667
    global server
2552
668
    # From the Avahi example code
2553
 
    DBusGMainLoop(set_as_default=True)
 
669
    DBusGMainLoop(set_as_default=True )
2554
670
    main_loop = gobject.MainLoop()
2555
671
    bus = dbus.SystemBus()
 
672
    server = dbus.Interface(
 
673
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
674
            avahi.DBUS_INTERFACE_SERVER )
2556
675
    # End of Avahi example code
2557
 
    if use_dbus:
2558
 
        try:
2559
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2560
 
                                            bus,
2561
 
                                            do_not_queue=True)
2562
 
            old_bus_name = dbus.service.BusName(
2563
 
                "se.bsnet.fukt.Mandos", bus,
2564
 
                do_not_queue=True)
2565
 
        except dbus.exceptions.NameExistsException as e:
2566
 
            logger.error("Disabling D-Bus:", exc_info=e)
2567
 
            use_dbus = False
2568
 
            server_settings["use_dbus"] = False
2569
 
            tcp_server.use_dbus = False
2570
 
    if zeroconf:
2571
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2572
 
        service = AvahiServiceToSyslog(
2573
 
            name = server_settings["servicename"],
2574
 
            servicetype = "_mandos._tcp",
2575
 
            protocol = protocol,
2576
 
            bus = bus)
2577
 
        if server_settings["interface"]:
2578
 
            service.interface = if_nametoindex(
2579
 
                server_settings["interface"].encode("utf-8"))
2580
 
    
2581
 
    global multiprocessing_manager
2582
 
    multiprocessing_manager = multiprocessing.Manager()
2583
 
    
2584
 
    client_class = Client
2585
 
    if use_dbus:
2586
 
        client_class = functools.partial(ClientDBus, bus = bus)
2587
 
    
2588
 
    client_settings = Client.config_parser(client_config)
2589
 
    old_client_settings = {}
2590
 
    clients_data = {}
2591
 
    
2592
 
    # This is used to redirect stdout and stderr for checker processes
2593
 
    global wnull
2594
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2595
 
    # Only used if server is running in foreground but not in debug
2596
 
    # mode
2597
 
    if debug or not foreground:
2598
 
        wnull.close()
2599
 
    
2600
 
    # Get client data and settings from last running state.
2601
 
    if server_settings["restore"]:
2602
 
        try:
2603
 
            with open(stored_state_path, "rb") as stored_state:
2604
 
                clients_data, old_client_settings = pickle.load(
2605
 
                    stored_state)
2606
 
            os.remove(stored_state_path)
2607
 
        except IOError as e:
2608
 
            if e.errno == errno.ENOENT:
2609
 
                logger.warning("Could not load persistent state:"
2610
 
                               " {}".format(os.strerror(e.errno)))
2611
 
            else:
2612
 
                logger.critical("Could not load persistent state:",
2613
 
                                exc_info=e)
2614
 
                raise
2615
 
        except EOFError as e:
2616
 
            logger.warning("Could not load persistent state: "
2617
 
                           "EOFError:",
2618
 
                           exc_info=e)
2619
 
    
2620
 
    with PGPEngine() as pgp:
2621
 
        for client_name, client in clients_data.items():
2622
 
            # Skip removed clients
2623
 
            if client_name not in client_settings:
2624
 
                continue
2625
 
            
2626
 
            # Decide which value to use after restoring saved state.
2627
 
            # We have three different values: Old config file,
2628
 
            # new config file, and saved state.
2629
 
            # New config value takes precedence if it differs from old
2630
 
            # config value, otherwise use saved state.
2631
 
            for name, value in client_settings[client_name].items():
2632
 
                try:
2633
 
                    # For each value in new config, check if it
2634
 
                    # differs from the old config value (Except for
2635
 
                    # the "secret" attribute)
2636
 
                    if (name != "secret"
2637
 
                        and (value !=
2638
 
                             old_client_settings[client_name][name])):
2639
 
                        client[name] = value
2640
 
                except KeyError:
2641
 
                    pass
2642
 
            
2643
 
            # Clients who has passed its expire date can still be
2644
 
            # enabled if its last checker was successful.  A Client
2645
 
            # whose checker succeeded before we stored its state is
2646
 
            # assumed to have successfully run all checkers during
2647
 
            # downtime.
2648
 
            if client["enabled"]:
2649
 
                if datetime.datetime.utcnow() >= client["expires"]:
2650
 
                    if not client["last_checked_ok"]:
2651
 
                        logger.warning(
2652
 
                            "disabling client {} - Client never "
2653
 
                            "performed a successful checker".format(
2654
 
                                client_name))
2655
 
                        client["enabled"] = False
2656
 
                    elif client["last_checker_status"] != 0:
2657
 
                        logger.warning(
2658
 
                            "disabling client {} - Client last"
2659
 
                            " checker failed with error code"
2660
 
                            " {}".format(
2661
 
                                client_name,
2662
 
                                client["last_checker_status"]))
2663
 
                        client["enabled"] = False
2664
 
                    else:
2665
 
                        client["expires"] = (
2666
 
                            datetime.datetime.utcnow()
2667
 
                            + client["timeout"])
2668
 
                        logger.debug("Last checker succeeded,"
2669
 
                                     " keeping {} enabled".format(
2670
 
                                         client_name))
2671
 
            try:
2672
 
                client["secret"] = pgp.decrypt(
2673
 
                    client["encrypted_secret"],
2674
 
                    client_settings[client_name]["secret"])
2675
 
            except PGPError:
2676
 
                # If decryption fails, we use secret from new settings
2677
 
                logger.debug("Failed to decrypt {} old secret".format(
2678
 
                    client_name))
2679
 
                client["secret"] = (client_settings[client_name]
2680
 
                                    ["secret"])
2681
 
    
2682
 
    # Add/remove clients based on new changes made to config
2683
 
    for client_name in (set(old_client_settings)
2684
 
                        - set(client_settings)):
2685
 
        del clients_data[client_name]
2686
 
    for client_name in (set(client_settings)
2687
 
                        - set(old_client_settings)):
2688
 
        clients_data[client_name] = client_settings[client_name]
2689
 
    
2690
 
    # Create all client objects
2691
 
    for client_name, client in clients_data.items():
2692
 
        tcp_server.clients[client_name] = client_class(
2693
 
            name = client_name,
2694
 
            settings = client,
2695
 
            server_settings = server_settings)
2696
 
    
2697
 
    if not tcp_server.clients:
2698
 
        logger.warning("No clients defined")
2699
 
    
2700
 
    if not foreground:
2701
 
        if pidfile is not None:
2702
 
            try:
2703
 
                with pidfile:
2704
 
                    pid = os.getpid()
2705
 
                    pidfile.write("{}\n".format(pid).encode("utf-8"))
2706
 
            except IOError:
2707
 
                logger.error("Could not write to file %r with PID %d",
2708
 
                             pidfilename, pid)
2709
 
        del pidfile
2710
 
        del pidfilename
2711
 
    
2712
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2713
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2714
 
    
2715
 
    if use_dbus:
2716
 
        
2717
 
        @alternate_dbus_interfaces(
2718
 
            { "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
2719
 
        class MandosDBusService(DBusObjectWithProperties):
2720
 
            """A D-Bus proxy object"""
2721
 
            
2722
 
            def __init__(self):
2723
 
                dbus.service.Object.__init__(self, bus, "/")
2724
 
            
2725
 
            _interface = "se.recompile.Mandos"
2726
 
            
2727
 
            @dbus_interface_annotations(_interface)
2728
 
            def _foo(self):
2729
 
                return {
2730
 
                    "org.freedesktop.DBus.Property.EmitsChangedSignal":
2731
 
                    "false" }
2732
 
            
2733
 
            @dbus.service.signal(_interface, signature="o")
2734
 
            def ClientAdded(self, objpath):
2735
 
                "D-Bus signal"
2736
 
                pass
2737
 
            
2738
 
            @dbus.service.signal(_interface, signature="ss")
2739
 
            def ClientNotFound(self, fingerprint, address):
2740
 
                "D-Bus signal"
2741
 
                pass
2742
 
            
2743
 
            @dbus.service.signal(_interface, signature="os")
2744
 
            def ClientRemoved(self, objpath, name):
2745
 
                "D-Bus signal"
2746
 
                pass
2747
 
            
2748
 
            @dbus.service.method(_interface, out_signature="ao")
2749
 
            def GetAllClients(self):
2750
 
                "D-Bus method"
2751
 
                return dbus.Array(c.dbus_object_path for c in
2752
 
                                  tcp_server.clients.itervalues())
2753
 
            
2754
 
            @dbus.service.method(_interface,
2755
 
                                 out_signature="a{oa{sv}}")
2756
 
            def GetAllClientsWithProperties(self):
2757
 
                "D-Bus method"
2758
 
                return dbus.Dictionary(
2759
 
                    { c.dbus_object_path: c.GetAll("")
2760
 
                      for c in tcp_server.clients.itervalues() },
2761
 
                    signature="oa{sv}")
2762
 
            
2763
 
            @dbus.service.method(_interface, in_signature="o")
2764
 
            def RemoveClient(self, object_path):
2765
 
                "D-Bus method"
2766
 
                for c in tcp_server.clients.itervalues():
2767
 
                    if c.dbus_object_path == object_path:
2768
 
                        del tcp_server.clients[c.name]
2769
 
                        c.remove_from_connection()
2770
 
                        # Don't signal anything except ClientRemoved
2771
 
                        c.disable(quiet=True)
2772
 
                        # Emit D-Bus signal
2773
 
                        self.ClientRemoved(object_path, c.name)
2774
 
                        return
2775
 
                raise KeyError(object_path)
2776
 
            
2777
 
            del _interface
2778
 
        
2779
 
        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)
2780
702
    
2781
703
    def cleanup():
2782
704
        "Cleanup function; run on exit"
2783
 
        if zeroconf:
2784
 
            service.cleanup()
2785
 
        
2786
 
        multiprocessing.active_children()
2787
 
        wnull.close()
2788
 
        if not (tcp_server.clients or client_settings):
2789
 
            return
2790
 
        
2791
 
        # Store client before exiting. Secrets are encrypted with key
2792
 
        # based on what config file has. If config file is
2793
 
        # removed/edited, old secret will thus be unrecovable.
2794
 
        clients = {}
2795
 
        with PGPEngine() as pgp:
2796
 
            for client in tcp_server.clients.itervalues():
2797
 
                key = client_settings[client.name]["secret"]
2798
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2799
 
                                                      key)
2800
 
                client_dict = {}
2801
 
                
2802
 
                # A list of attributes that can not be pickled
2803
 
                # + secret.
2804
 
                exclude = { "bus", "changedstate", "secret",
2805
 
                            "checker", "server_settings" }
2806
 
                for name, typ in inspect.getmembers(dbus.service
2807
 
                                                    .Object):
2808
 
                    exclude.add(name)
2809
 
                
2810
 
                client_dict["encrypted_secret"] = (client
2811
 
                                                   .encrypted_secret)
2812
 
                for attr in client.client_structure:
2813
 
                    if attr not in exclude:
2814
 
                        client_dict[attr] = getattr(client, attr)
2815
 
                
2816
 
                clients[client.name] = client_dict
2817
 
                del client_settings[client.name]["secret"]
2818
 
        
2819
 
        try:
2820
 
            with tempfile.NamedTemporaryFile(
2821
 
                    mode='wb',
2822
 
                    suffix=".pickle",
2823
 
                    prefix='clients-',
2824
 
                    dir=os.path.dirname(stored_state_path),
2825
 
                    delete=False) as stored_state:
2826
 
                pickle.dump((clients, client_settings), stored_state)
2827
 
                tempname = stored_state.name
2828
 
            os.rename(tempname, stored_state_path)
2829
 
        except (IOError, OSError) as e:
2830
 
            if not debug:
2831
 
                try:
2832
 
                    os.remove(tempname)
2833
 
                except NameError:
2834
 
                    pass
2835
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2836
 
                logger.warning("Could not save persistent state: {}"
2837
 
                               .format(os.strerror(e.errno)))
2838
 
            else:
2839
 
                logger.warning("Could not save persistent state:",
2840
 
                               exc_info=e)
2841
 
                raise
2842
 
        
2843
 
        # Delete all clients, and settings from config
2844
 
        while tcp_server.clients:
2845
 
            name, client = tcp_server.clients.popitem()
2846
 
            if use_dbus:
2847
 
                client.remove_from_connection()
2848
 
            # Don't signal anything except ClientRemoved
2849
 
            client.disable(quiet=True)
2850
 
            if use_dbus:
2851
 
                # Emit D-Bus signal
2852
 
                mandos_dbus_service.ClientRemoved(
2853
 
                    client.dbus_object_path, client.name)
2854
 
        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()
2855
716
    
2856
717
    atexit.register(cleanup)
2857
718
    
2858
 
    for client in tcp_server.clients.itervalues():
2859
 
        if use_dbus:
2860
 
            # Emit D-Bus signal
2861
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2862
 
        # Need to initiate checking of clients
2863
 
        if client.enabled:
2864
 
            client.init_checker()
2865
 
    
2866
 
    tcp_server.enable()
2867
 
    tcp_server.server_activate()
2868
 
    
2869
 
    # Find out what port we got
2870
 
    if zeroconf:
2871
 
        service.port = tcp_server.socket.getsockname()[1]
2872
 
    if use_ipv6:
2873
 
        logger.info("Now listening on address %r, port %d,"
2874
 
                    " flowinfo %d, scope_id %d",
2875
 
                    *tcp_server.socket.getsockname())
2876
 
    else:                       # IPv4
2877
 
        logger.info("Now listening on address %r, port %d",
2878
 
                    *tcp_server.socket.getsockname())
2879
 
    
2880
 
    #service.interface = tcp_server.socket.getsockname()[3]
2881
 
    
2882
 
    try:
2883
 
        if zeroconf:
2884
 
            # From the Avahi example code
2885
 
            try:
2886
 
                service.activate()
2887
 
            except dbus.exceptions.DBusException as error:
2888
 
                logger.critical("D-Bus Exception", exc_info=error)
2889
 
                cleanup()
2890
 
                sys.exit(1)
2891
 
            # End of Avahi example code
2892
 
        
2893
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2894
 
                             lambda *args, **kwargs:
2895
 
                             (tcp_server.handle_request
2896
 
                              (*args[2:], **kwargs) or True))
2897
 
        
 
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:
2898
754
        logger.debug("Starting main loop")
 
755
        main_loop_started = True
2899
756
        main_loop.run()
2900
 
    except AvahiError as error:
2901
 
        logger.critical("Avahi Error", exc_info=error)
2902
 
        cleanup()
2903
 
        sys.exit(1)
2904
757
    except KeyboardInterrupt:
2905
758
        if debug:
2906
 
            print("", file=sys.stderr)
2907
 
        logger.debug("Server received KeyboardInterrupt")
2908
 
    logger.debug("Server exiting")
2909
 
    # Must run before the D-Bus bus name gets deregistered
2910
 
    cleanup()
2911
 
 
 
759
            print
 
760
    
 
761
    sys.exit(exitstatus)
2912
762
 
2913
763
if __name__ == '__main__':
2914
764
    main()