/mandos/trunk

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  • Committer: Björn Påhlsson
  • Date: 2008-07-20 02:52:20 UTC
  • Revision ID: belorn@braxen-20080720025220-r5u0388uy9iu23h6
Added following support:
Pluginbased client handler
rewritten Mandos client
       Avahi instead of udp server discovery
       openpgp encrypted key support
Passprompt stand alone application for direct console input
Added logging for Mandos server

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1
#!/usr/bin/python
2
 
# -*- mode: python; coding: utf-8 -*-
3
 
#
4
 
# Mandos server - give out binary blobs to connecting clients.
5
 
#
6
 
# This program is partly derived from an example program for an Avahi
7
 
# service publisher, downloaded from
8
 
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
12
 
#
13
 
# Everything else is
14
 
# Copyright © 2008-2016 Teddy Hogeborn
15
 
# Copyright © 2008-2016 Björn Påhlsson
16
 
#
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
19
 
# the Free Software Foundation, either version 3 of the License, or
20
 
# (at your option) any later version.
21
 
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
24
 
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
 
#     GNU General Public License for more details.
26
 
#
27
 
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
#
31
 
# Contact the authors at <mandos@recompile.se>.
32
 
#
33
 
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
try:
38
 
    from future_builtins import *
39
 
except ImportError:
40
 
    pass
41
 
 
42
 
try:
43
 
    import SocketServer as socketserver
44
 
except ImportError:
45
 
    import socketserver
 
2
 
 
3
from __future__ import division
 
4
 
 
5
import SocketServer
46
6
import socket
47
 
import argparse
 
7
import select
 
8
from optparse import OptionParser
48
9
import datetime
49
10
import errno
50
 
try:
51
 
    import ConfigParser as configparser
52
 
except ImportError:
53
 
    import configparser
 
11
import gnutls.crypto
 
12
import gnutls.connection
 
13
import gnutls.errors
 
14
import gnutls.library.functions
 
15
import gnutls.library.constants
 
16
import gnutls.library.types
 
17
import ConfigParser
54
18
import sys
55
19
import re
56
20
import os
57
21
import signal
 
22
from sets import Set
58
23
import subprocess
59
 
import atexit
60
 
import stat
61
 
import logging
62
 
import logging.handlers
63
 
import pwd
64
 
import contextlib
65
 
import struct
66
 
import fcntl
67
 
import functools
68
 
try:
69
 
    import cPickle as pickle
70
 
except ImportError:
71
 
    import pickle
72
 
import multiprocessing
73
 
import types
74
 
import binascii
75
 
import tempfile
76
 
import itertools
77
 
import collections
78
 
import codecs
79
24
 
80
25
import dbus
81
 
import dbus.service
82
 
from gi.repository import GLib
 
26
import gobject
 
27
import avahi
83
28
from dbus.mainloop.glib import DBusGMainLoop
84
29
import ctypes
85
 
import ctypes.util
86
 
import xml.dom.minidom
87
 
import inspect
88
 
 
89
 
# Try to find the value of SO_BINDTODEVICE:
90
 
try:
91
 
    # This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
92
 
    # newer, and it is also the most natural place for it:
93
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
94
 
except AttributeError:
95
 
    try:
96
 
        # This is where SO_BINDTODEVICE was up to and including Python
97
 
        # 2.6, and also 3.2:
98
 
        from IN import SO_BINDTODEVICE
99
 
    except ImportError:
100
 
        # In Python 2.7 it seems to have been removed entirely.
101
 
        # Try running the C preprocessor:
102
 
        try:
103
 
            cc = subprocess.Popen(["cc", "--language=c", "-E",
104
 
                                   "/dev/stdin"],
105
 
                                  stdin=subprocess.PIPE,
106
 
                                  stdout=subprocess.PIPE)
107
 
            stdout = cc.communicate(
108
 
                "#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
109
 
            SO_BINDTODEVICE = int(stdout.splitlines()[-1])
110
 
        except (OSError, ValueError, IndexError):
111
 
            # No value found
112
 
            SO_BINDTODEVICE = None
113
 
 
114
 
if sys.version_info.major == 2:
115
 
    str = unicode
116
 
 
117
 
version = "1.7.13"
118
 
stored_state_file = "clients.pickle"
119
 
 
120
 
logger = logging.getLogger()
121
 
syslogger = None
122
 
 
123
 
try:
124
 
    if_nametoindex = ctypes.cdll.LoadLibrary(
125
 
        ctypes.util.find_library("c")).if_nametoindex
126
 
except (OSError, AttributeError):
127
 
 
128
 
    def if_nametoindex(interface):
129
 
        "Get an interface index the hard way, i.e. using fcntl()"
130
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
131
 
        with contextlib.closing(socket.socket()) as s:
132
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
133
 
                                struct.pack(b"16s16x", interface))
134
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
135
 
        return interface_index
136
 
 
137
 
 
138
 
def copy_function(func):
139
 
    """Make a copy of a function"""
140
 
    if sys.version_info.major == 2:
141
 
        return types.FunctionType(func.func_code,
142
 
                                  func.func_globals,
143
 
                                  func.func_name,
144
 
                                  func.func_defaults,
145
 
                                  func.func_closure)
146
 
    else:
147
 
        return types.FunctionType(func.__code__,
148
 
                                  func.__globals__,
149
 
                                  func.__name__,
150
 
                                  func.__defaults__,
151
 
                                  func.__closure__)
152
 
 
153
 
 
154
 
def initlogger(debug, level=logging.WARNING):
155
 
    """init logger and add loglevel"""
156
 
 
157
 
    global syslogger
158
 
    syslogger = (logging.handlers.SysLogHandler(
159
 
        facility=logging.handlers.SysLogHandler.LOG_DAEMON,
160
 
        address="/dev/log"))
161
 
    syslogger.setFormatter(logging.Formatter
162
 
                           ('Mandos [%(process)d]: %(levelname)s:'
163
 
                            ' %(message)s'))
164
 
    logger.addHandler(syslogger)
165
 
 
166
 
    if debug:
167
 
        console = logging.StreamHandler()
168
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
169
 
                                               ' [%(process)d]:'
170
 
                                               ' %(levelname)s:'
171
 
                                               ' %(message)s'))
172
 
        logger.addHandler(console)
173
 
    logger.setLevel(level)
174
 
 
175
 
 
176
 
class PGPError(Exception):
177
 
    """Exception if encryption/decryption fails"""
178
 
    pass
179
 
 
180
 
 
181
 
class PGPEngine(object):
182
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
183
 
 
184
 
    def __init__(self):
185
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
186
 
        self.gpg = "gpg"
187
 
        try:
188
 
            output = subprocess.check_output(["gpgconf"])
189
 
            for line in output.splitlines():
190
 
                name, text, path = line.split(b":")
191
 
                if name == "gpg":
192
 
                    self.gpg = path
193
 
                    break
194
 
        except OSError as e:
195
 
            if e.errno != errno.ENOENT:
196
 
                raise
197
 
        self.gnupgargs = ['--batch',
198
 
                          '--homedir', self.tempdir,
199
 
                          '--force-mdc',
200
 
                          '--quiet']
201
 
        # Only GPG version 1 has the --no-use-agent option.
202
 
        if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
203
 
            self.gnupgargs.append("--no-use-agent")
204
 
 
205
 
    def __enter__(self):
206
 
        return self
207
 
 
208
 
    def __exit__(self, exc_type, exc_value, traceback):
209
 
        self._cleanup()
210
 
        return False
211
 
 
212
 
    def __del__(self):
213
 
        self._cleanup()
214
 
 
215
 
    def _cleanup(self):
216
 
        if self.tempdir is not None:
217
 
            # Delete contents of tempdir
218
 
            for root, dirs, files in os.walk(self.tempdir,
219
 
                                             topdown=False):
220
 
                for filename in files:
221
 
                    os.remove(os.path.join(root, filename))
222
 
                for dirname in dirs:
223
 
                    os.rmdir(os.path.join(root, dirname))
224
 
            # Remove tempdir
225
 
            os.rmdir(self.tempdir)
226
 
            self.tempdir = None
227
 
 
228
 
    def password_encode(self, password):
229
 
        # Passphrase can not be empty and can not contain newlines or
230
 
        # NUL bytes.  So we prefix it and hex encode it.
231
 
        encoded = b"mandos" + binascii.hexlify(password)
232
 
        if len(encoded) > 2048:
233
 
            # GnuPG can't handle long passwords, so encode differently
234
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
235
 
                       .replace(b"\n", b"\\n")
236
 
                       .replace(b"\0", b"\\x00"))
237
 
        return encoded
238
 
 
239
 
    def encrypt(self, data, password):
240
 
        passphrase = self.password_encode(password)
241
 
        with tempfile.NamedTemporaryFile(
242
 
                dir=self.tempdir) as passfile:
243
 
            passfile.write(passphrase)
244
 
            passfile.flush()
245
 
            proc = subprocess.Popen([self.gpg, '--symmetric',
246
 
                                     '--passphrase-file',
247
 
                                     passfile.name]
248
 
                                    + self.gnupgargs,
249
 
                                    stdin=subprocess.PIPE,
250
 
                                    stdout=subprocess.PIPE,
251
 
                                    stderr=subprocess.PIPE)
252
 
            ciphertext, err = proc.communicate(input=data)
253
 
        if proc.returncode != 0:
254
 
            raise PGPError(err)
255
 
        return ciphertext
256
 
 
257
 
    def decrypt(self, data, password):
258
 
        passphrase = self.password_encode(password)
259
 
        with tempfile.NamedTemporaryFile(
260
 
                dir=self.tempdir) as passfile:
261
 
            passfile.write(passphrase)
262
 
            passfile.flush()
263
 
            proc = subprocess.Popen([self.gpg, '--decrypt',
264
 
                                     '--passphrase-file',
265
 
                                     passfile.name]
266
 
                                    + self.gnupgargs,
267
 
                                    stdin=subprocess.PIPE,
268
 
                                    stdout=subprocess.PIPE,
269
 
                                    stderr=subprocess.PIPE)
270
 
            decrypted_plaintext, err = proc.communicate(input=data)
271
 
        if proc.returncode != 0:
272
 
            raise PGPError(err)
273
 
        return decrypted_plaintext
274
 
 
275
 
 
276
 
# Pretend that we have an Avahi module
277
 
class Avahi(object):
278
 
    """This isn't so much a class as it is a module-like namespace.
279
 
    It is instantiated once, and simulates having an Avahi module."""
280
 
    IF_UNSPEC = -1               # avahi-common/address.h
281
 
    PROTO_UNSPEC = -1            # avahi-common/address.h
282
 
    PROTO_INET = 0               # avahi-common/address.h
283
 
    PROTO_INET6 = 1              # avahi-common/address.h
284
 
    DBUS_NAME = "org.freedesktop.Avahi"
285
 
    DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
286
 
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
287
 
    DBUS_PATH_SERVER = "/"
288
 
 
289
 
    def string_array_to_txt_array(self, t):
290
 
        return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
291
 
                           for s in t), signature="ay")
292
 
    ENTRY_GROUP_ESTABLISHED = 2  # avahi-common/defs.h
293
 
    ENTRY_GROUP_COLLISION = 3    # avahi-common/defs.h
294
 
    ENTRY_GROUP_FAILURE = 4      # avahi-common/defs.h
295
 
    SERVER_INVALID = 0           # avahi-common/defs.h
296
 
    SERVER_REGISTERING = 1       # avahi-common/defs.h
297
 
    SERVER_RUNNING = 2           # avahi-common/defs.h
298
 
    SERVER_COLLISION = 3         # avahi-common/defs.h
299
 
    SERVER_FAILURE = 4           # avahi-common/defs.h
300
 
avahi = Avahi()
301
 
 
302
 
 
303
 
class AvahiError(Exception):
304
 
    def __init__(self, value, *args, **kwargs):
305
 
        self.value = value
306
 
        return super(AvahiError, self).__init__(value, *args,
307
 
                                                **kwargs)
308
 
 
309
 
 
310
 
class AvahiServiceError(AvahiError):
311
 
    pass
312
 
 
313
 
 
314
 
class AvahiGroupError(AvahiError):
315
 
    pass
316
 
 
317
 
 
318
 
class AvahiService(object):
319
 
    """An Avahi (Zeroconf) service.
320
 
 
321
 
    Attributes:
322
 
    interface: integer; avahi.IF_UNSPEC or an interface index.
323
 
               Used to optionally bind to the specified interface.
324
 
    name: string; Example: 'Mandos'
325
 
    type: string; Example: '_mandos._tcp'.
326
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
327
 
    port: integer; what port to announce
328
 
    TXT: list of strings; TXT record for the service
329
 
    domain: string; Domain to publish on, default to .local if empty.
330
 
    host: string; Host to publish records for, default is localhost
331
 
    max_renames: integer; maximum number of renames
332
 
    rename_count: integer; counter so we only rename after collisions
333
 
                  a sensible number of times
334
 
    group: D-Bus Entry Group
335
 
    server: D-Bus Server
336
 
    bus: dbus.SystemBus()
337
 
    """
338
 
 
339
 
    def __init__(self,
340
 
                 interface=avahi.IF_UNSPEC,
341
 
                 name=None,
342
 
                 servicetype=None,
343
 
                 port=None,
344
 
                 TXT=None,
345
 
                 domain="",
346
 
                 host="",
347
 
                 max_renames=32768,
348
 
                 protocol=avahi.PROTO_UNSPEC,
349
 
                 bus=None):
350
 
        self.interface = interface
351
 
        self.name = name
352
 
        self.type = servicetype
353
 
        self.port = port
354
 
        self.TXT = TXT if TXT is not None else []
355
 
        self.domain = domain
356
 
        self.host = host
357
 
        self.rename_count = 0
358
 
        self.max_renames = max_renames
359
 
        self.protocol = protocol
360
 
        self.group = None       # our entry group
361
 
        self.server = None
362
 
        self.bus = bus
363
 
        self.entry_group_state_changed_match = None
364
 
 
365
 
    def rename(self, remove=True):
366
 
        """Derived from the Avahi example code"""
367
 
        if self.rename_count >= self.max_renames:
368
 
            logger.critical("No suitable Zeroconf service name found"
369
 
                            " after %i retries, exiting.",
370
 
                            self.rename_count)
371
 
            raise AvahiServiceError("Too many renames")
372
 
        self.name = str(
373
 
            self.server.GetAlternativeServiceName(self.name))
374
 
        self.rename_count += 1
375
 
        logger.info("Changing Zeroconf service name to %r ...",
376
 
                    self.name)
377
 
        if remove:
378
 
            self.remove()
379
 
        try:
380
 
            self.add()
381
 
        except dbus.exceptions.DBusException as error:
382
 
            if (error.get_dbus_name()
383
 
                == "org.freedesktop.Avahi.CollisionError"):
384
 
                logger.info("Local Zeroconf service name collision.")
385
 
                return self.rename(remove=False)
386
 
            else:
387
 
                logger.critical("D-Bus Exception", exc_info=error)
388
 
                self.cleanup()
389
 
                os._exit(1)
390
 
 
391
 
    def remove(self):
392
 
        """Derived from the Avahi example code"""
393
 
        if self.entry_group_state_changed_match is not None:
394
 
            self.entry_group_state_changed_match.remove()
395
 
            self.entry_group_state_changed_match = None
396
 
        if self.group is not None:
397
 
            self.group.Reset()
398
 
 
399
 
    def add(self):
400
 
        """Derived from the Avahi example code"""
401
 
        self.remove()
402
 
        if self.group is None:
403
 
            self.group = dbus.Interface(
404
 
                self.bus.get_object(avahi.DBUS_NAME,
405
 
                                    self.server.EntryGroupNew()),
406
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
407
 
        self.entry_group_state_changed_match = (
408
 
            self.group.connect_to_signal(
409
 
                'StateChanged', self.entry_group_state_changed))
410
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
411
 
                     self.name, self.type)
412
 
        self.group.AddService(
413
 
            self.interface,
414
 
            self.protocol,
415
 
            dbus.UInt32(0),     # flags
416
 
            self.name, self.type,
417
 
            self.domain, self.host,
418
 
            dbus.UInt16(self.port),
419
 
            avahi.string_array_to_txt_array(self.TXT))
420
 
        self.group.Commit()
421
 
 
422
 
    def entry_group_state_changed(self, state, error):
423
 
        """Derived from the Avahi example code"""
424
 
        logger.debug("Avahi entry group state change: %i", state)
425
 
 
426
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
427
 
            logger.debug("Zeroconf service established.")
428
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
429
 
            logger.info("Zeroconf service name collision.")
430
 
            self.rename()
431
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
432
 
            logger.critical("Avahi: Error in group state changed %s",
433
 
                            str(error))
434
 
            raise AvahiGroupError("State changed: {!s}".format(error))
435
 
 
436
 
    def cleanup(self):
437
 
        """Derived from the Avahi example code"""
438
 
        if self.group is not None:
439
 
            try:
440
 
                self.group.Free()
441
 
            except (dbus.exceptions.UnknownMethodException,
442
 
                    dbus.exceptions.DBusException):
443
 
                pass
444
 
            self.group = None
445
 
        self.remove()
446
 
 
447
 
    def server_state_changed(self, state, error=None):
448
 
        """Derived from the Avahi example code"""
449
 
        logger.debug("Avahi server state change: %i", state)
450
 
        bad_states = {
451
 
            avahi.SERVER_INVALID: "Zeroconf server invalid",
452
 
            avahi.SERVER_REGISTERING: None,
453
 
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
454
 
            avahi.SERVER_FAILURE: "Zeroconf server failure",
455
 
        }
456
 
        if state in bad_states:
457
 
            if bad_states[state] is not None:
458
 
                if error is None:
459
 
                    logger.error(bad_states[state])
460
 
                else:
461
 
                    logger.error(bad_states[state] + ": %r", error)
462
 
            self.cleanup()
463
 
        elif state == avahi.SERVER_RUNNING:
464
 
            try:
465
 
                self.add()
466
 
            except dbus.exceptions.DBusException as error:
467
 
                if (error.get_dbus_name()
468
 
                    == "org.freedesktop.Avahi.CollisionError"):
469
 
                    logger.info("Local Zeroconf service name"
470
 
                                " collision.")
471
 
                    return self.rename(remove=False)
472
 
                else:
473
 
                    logger.critical("D-Bus Exception", exc_info=error)
474
 
                    self.cleanup()
475
 
                    os._exit(1)
476
 
        else:
477
 
            if error is None:
478
 
                logger.debug("Unknown state: %r", state)
479
 
            else:
480
 
                logger.debug("Unknown state: %r: %r", state, error)
481
 
 
482
 
    def activate(self):
483
 
        """Derived from the Avahi example code"""
484
 
        if self.server is None:
485
 
            self.server = dbus.Interface(
486
 
                self.bus.get_object(avahi.DBUS_NAME,
487
 
                                    avahi.DBUS_PATH_SERVER,
488
 
                                    follow_name_owner_changes=True),
489
 
                avahi.DBUS_INTERFACE_SERVER)
490
 
        self.server.connect_to_signal("StateChanged",
491
 
                                      self.server_state_changed)
492
 
        self.server_state_changed(self.server.GetState())
493
 
 
494
 
 
495
 
class AvahiServiceToSyslog(AvahiService):
496
 
    def rename(self, *args, **kwargs):
497
 
        """Add the new name to the syslog messages"""
498
 
        ret = AvahiService.rename(self, *args, **kwargs)
499
 
        syslogger.setFormatter(logging.Formatter(
500
 
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
501
 
            .format(self.name)))
502
 
        return ret
503
 
 
504
 
 
505
 
# Pretend that we have a GnuTLS module
506
 
class GnuTLS(object):
507
 
    """This isn't so much a class as it is a module-like namespace.
508
 
    It is instantiated once, and simulates having a GnuTLS module."""
509
 
 
510
 
    library = ctypes.util.find_library("gnutls")
511
 
    if library is None:
512
 
        library = ctypes.util.find_library("gnutls-deb0")
513
 
    _library = ctypes.cdll.LoadLibrary(library)
514
 
    del library
515
 
    _need_version = b"3.3.0"
516
 
 
517
 
    def __init__(self):
518
 
        # Need to use "self" here, since this method is called before
519
 
        # the assignment to the "gnutls" global variable happens.
520
 
        if self.check_version(self._need_version) is None:
521
 
            raise self.Error("Needs GnuTLS {} or later"
522
 
                             .format(self._need_version))
523
 
 
524
 
    # Unless otherwise indicated, the constants and types below are
525
 
    # all from the gnutls/gnutls.h C header file.
526
 
 
527
 
    # Constants
528
 
    E_SUCCESS = 0
529
 
    E_INTERRUPTED = -52
530
 
    E_AGAIN = -28
531
 
    CRT_OPENPGP = 2
532
 
    CLIENT = 2
533
 
    SHUT_RDWR = 0
534
 
    CRD_CERTIFICATE = 1
535
 
    E_NO_CERTIFICATE_FOUND = -49
536
 
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
537
 
 
538
 
    # Types
539
 
    class session_int(ctypes.Structure):
540
 
        _fields_ = []
541
 
    session_t = ctypes.POINTER(session_int)
542
 
 
543
 
    class certificate_credentials_st(ctypes.Structure):
544
 
        _fields_ = []
545
 
    certificate_credentials_t = ctypes.POINTER(
546
 
        certificate_credentials_st)
547
 
    certificate_type_t = ctypes.c_int
548
 
 
549
 
    class datum_t(ctypes.Structure):
550
 
        _fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
551
 
                    ('size', ctypes.c_uint)]
552
 
 
553
 
    class openpgp_crt_int(ctypes.Structure):
554
 
        _fields_ = []
555
 
    openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
556
 
    openpgp_crt_fmt_t = ctypes.c_int  # gnutls/openpgp.h
557
 
    log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
558
 
    credentials_type_t = ctypes.c_int
559
 
    transport_ptr_t = ctypes.c_void_p
560
 
    close_request_t = ctypes.c_int
561
 
 
562
 
    # Exceptions
563
 
    class Error(Exception):
564
 
        # We need to use the class name "GnuTLS" here, since this
565
 
        # exception might be raised from within GnuTLS.__init__,
566
 
        # which is called before the assignment to the "gnutls"
567
 
        # global variable has happened.
568
 
        def __init__(self, message=None, code=None, args=()):
569
 
            # Default usage is by a message string, but if a return
570
 
            # code is passed, convert it to a string with
571
 
            # gnutls.strerror()
572
 
            self.code = code
573
 
            if message is None and code is not None:
574
 
                message = GnuTLS.strerror(code)
575
 
            return super(GnuTLS.Error, self).__init__(
576
 
                message, *args)
577
 
 
578
 
    class CertificateSecurityError(Error):
579
 
        pass
580
 
 
581
 
    # Classes
582
 
    class Credentials(object):
583
 
        def __init__(self):
584
 
            self._c_object = gnutls.certificate_credentials_t()
585
 
            gnutls.certificate_allocate_credentials(
586
 
                ctypes.byref(self._c_object))
587
 
            self.type = gnutls.CRD_CERTIFICATE
588
 
 
589
 
        def __del__(self):
590
 
            gnutls.certificate_free_credentials(self._c_object)
591
 
 
592
 
    class ClientSession(object):
593
 
        def __init__(self, socket, credentials=None):
594
 
            self._c_object = gnutls.session_t()
595
 
            gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
596
 
            gnutls.set_default_priority(self._c_object)
597
 
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
598
 
            gnutls.handshake_set_private_extensions(self._c_object,
599
 
                                                    True)
600
 
            self.socket = socket
601
 
            if credentials is None:
602
 
                credentials = gnutls.Credentials()
603
 
            gnutls.credentials_set(self._c_object, credentials.type,
604
 
                                   ctypes.cast(credentials._c_object,
605
 
                                               ctypes.c_void_p))
606
 
            self.credentials = credentials
607
 
 
608
 
        def __del__(self):
609
 
            gnutls.deinit(self._c_object)
610
 
 
611
 
        def handshake(self):
612
 
            return gnutls.handshake(self._c_object)
613
 
 
614
 
        def send(self, data):
615
 
            data = bytes(data)
616
 
            data_len = len(data)
617
 
            while data_len > 0:
618
 
                data_len -= gnutls.record_send(self._c_object,
619
 
                                               data[-data_len:],
620
 
                                               data_len)
621
 
 
622
 
        def bye(self):
623
 
            return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
624
 
 
625
 
    # Error handling functions
626
 
    def _error_code(result):
627
 
        """A function to raise exceptions on errors, suitable
628
 
        for the 'restype' attribute on ctypes functions"""
629
 
        if result >= 0:
630
 
            return result
631
 
        if result == gnutls.E_NO_CERTIFICATE_FOUND:
632
 
            raise gnutls.CertificateSecurityError(code=result)
633
 
        raise gnutls.Error(code=result)
634
 
 
635
 
    def _retry_on_error(result, func, arguments):
636
 
        """A function to retry on some errors, suitable
637
 
        for the 'errcheck' attribute on ctypes functions"""
638
 
        while result < 0:
639
 
            if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
640
 
                return _error_code(result)
641
 
            result = func(*arguments)
642
 
        return result
643
 
 
644
 
    # Unless otherwise indicated, the function declarations below are
645
 
    # all from the gnutls/gnutls.h C header file.
646
 
 
647
 
    # Functions
648
 
    priority_set_direct = _library.gnutls_priority_set_direct
649
 
    priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
650
 
                                    ctypes.POINTER(ctypes.c_char_p)]
651
 
    priority_set_direct.restype = _error_code
652
 
 
653
 
    init = _library.gnutls_init
654
 
    init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
655
 
    init.restype = _error_code
656
 
 
657
 
    set_default_priority = _library.gnutls_set_default_priority
658
 
    set_default_priority.argtypes = [session_t]
659
 
    set_default_priority.restype = _error_code
660
 
 
661
 
    record_send = _library.gnutls_record_send
662
 
    record_send.argtypes = [session_t, ctypes.c_void_p,
663
 
                            ctypes.c_size_t]
664
 
    record_send.restype = ctypes.c_ssize_t
665
 
    record_send.errcheck = _retry_on_error
666
 
 
667
 
    certificate_allocate_credentials = (
668
 
        _library.gnutls_certificate_allocate_credentials)
669
 
    certificate_allocate_credentials.argtypes = [
670
 
        ctypes.POINTER(certificate_credentials_t)]
671
 
    certificate_allocate_credentials.restype = _error_code
672
 
 
673
 
    certificate_free_credentials = (
674
 
        _library.gnutls_certificate_free_credentials)
675
 
    certificate_free_credentials.argtypes = [
676
 
        certificate_credentials_t]
677
 
    certificate_free_credentials.restype = None
678
 
 
679
 
    handshake_set_private_extensions = (
680
 
        _library.gnutls_handshake_set_private_extensions)
681
 
    handshake_set_private_extensions.argtypes = [session_t,
682
 
                                                 ctypes.c_int]
683
 
    handshake_set_private_extensions.restype = None
684
 
 
685
 
    credentials_set = _library.gnutls_credentials_set
686
 
    credentials_set.argtypes = [session_t, credentials_type_t,
687
 
                                ctypes.c_void_p]
688
 
    credentials_set.restype = _error_code
689
 
 
690
 
    strerror = _library.gnutls_strerror
691
 
    strerror.argtypes = [ctypes.c_int]
692
 
    strerror.restype = ctypes.c_char_p
693
 
 
694
 
    certificate_type_get = _library.gnutls_certificate_type_get
695
 
    certificate_type_get.argtypes = [session_t]
696
 
    certificate_type_get.restype = _error_code
697
 
 
698
 
    certificate_get_peers = _library.gnutls_certificate_get_peers
699
 
    certificate_get_peers.argtypes = [session_t,
700
 
                                      ctypes.POINTER(ctypes.c_uint)]
701
 
    certificate_get_peers.restype = ctypes.POINTER(datum_t)
702
 
 
703
 
    global_set_log_level = _library.gnutls_global_set_log_level
704
 
    global_set_log_level.argtypes = [ctypes.c_int]
705
 
    global_set_log_level.restype = None
706
 
 
707
 
    global_set_log_function = _library.gnutls_global_set_log_function
708
 
    global_set_log_function.argtypes = [log_func]
709
 
    global_set_log_function.restype = None
710
 
 
711
 
    deinit = _library.gnutls_deinit
712
 
    deinit.argtypes = [session_t]
713
 
    deinit.restype = None
714
 
 
715
 
    handshake = _library.gnutls_handshake
716
 
    handshake.argtypes = [session_t]
717
 
    handshake.restype = _error_code
718
 
    handshake.errcheck = _retry_on_error
719
 
 
720
 
    transport_set_ptr = _library.gnutls_transport_set_ptr
721
 
    transport_set_ptr.argtypes = [session_t, transport_ptr_t]
722
 
    transport_set_ptr.restype = None
723
 
 
724
 
    bye = _library.gnutls_bye
725
 
    bye.argtypes = [session_t, close_request_t]
726
 
    bye.restype = _error_code
727
 
    bye.errcheck = _retry_on_error
728
 
 
729
 
    check_version = _library.gnutls_check_version
730
 
    check_version.argtypes = [ctypes.c_char_p]
731
 
    check_version.restype = ctypes.c_char_p
732
 
 
733
 
    # All the function declarations below are from gnutls/openpgp.h
734
 
 
735
 
    openpgp_crt_init = _library.gnutls_openpgp_crt_init
736
 
    openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
737
 
    openpgp_crt_init.restype = _error_code
738
 
 
739
 
    openpgp_crt_import = _library.gnutls_openpgp_crt_import
740
 
    openpgp_crt_import.argtypes = [openpgp_crt_t,
741
 
                                   ctypes.POINTER(datum_t),
742
 
                                   openpgp_crt_fmt_t]
743
 
    openpgp_crt_import.restype = _error_code
744
 
 
745
 
    openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
746
 
    openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
747
 
                                        ctypes.POINTER(ctypes.c_uint)]
748
 
    openpgp_crt_verify_self.restype = _error_code
749
 
 
750
 
    openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
751
 
    openpgp_crt_deinit.argtypes = [openpgp_crt_t]
752
 
    openpgp_crt_deinit.restype = None
753
 
 
754
 
    openpgp_crt_get_fingerprint = (
755
 
        _library.gnutls_openpgp_crt_get_fingerprint)
756
 
    openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
757
 
                                            ctypes.c_void_p,
758
 
                                            ctypes.POINTER(
759
 
                                                ctypes.c_size_t)]
760
 
    openpgp_crt_get_fingerprint.restype = _error_code
761
 
 
762
 
    # Remove non-public functions
763
 
    del _error_code, _retry_on_error
764
 
# Create the global "gnutls" object, simulating a module
765
 
gnutls = GnuTLS()
766
 
 
767
 
 
768
 
def call_pipe(connection,       # : multiprocessing.Connection
769
 
              func, *args, **kwargs):
770
 
    """This function is meant to be called by multiprocessing.Process
771
 
 
772
 
    This function runs func(*args, **kwargs), and writes the resulting
773
 
    return value on the provided multiprocessing.Connection.
774
 
    """
775
 
    connection.send(func(*args, **kwargs))
776
 
    connection.close()
 
30
 
 
31
import logging
 
32
import logging.handlers
 
33
 
 
34
# logghandler.setFormatter(logging.Formatter('%(levelname)s %(message)s')
 
35
 
 
36
logger = logging.Logger('mandos')
 
37
logger.addHandler(logging.handlers.SysLogHandler(facility = logging.handlers.SysLogHandler.LOG_DAEMON))
 
38
 
 
39
# This variable is used to optionally bind to a specified interface.
 
40
# It is a global variable to fit in with the other variables from the
 
41
# Avahi server example code.
 
42
serviceInterface = avahi.IF_UNSPEC
 
43
# From the Avahi server example code:
 
44
serviceName = "Mandos"
 
45
serviceType = "_mandos._tcp" # http://www.dns-sd.org/ServiceTypes.html
 
46
servicePort = None                      # Not known at startup
 
47
serviceTXT = []                         # TXT record for the service
 
48
domain = ""                  # Domain to publish on, default to .local
 
49
host = ""          # Host to publish records for, default to localhost
 
50
group = None #our entry group
 
51
rename_count = 12       # Counter so we only rename after collisions a
 
52
                        # sensible number of times
 
53
# End of Avahi example code
777
54
 
778
55
 
779
56
class Client(object):
780
57
    """A representation of a client host served by this server.
781
 
 
782
58
    Attributes:
783
 
    approved:   bool(); 'None' if not yet approved/disapproved
784
 
    approval_delay: datetime.timedelta(); Time to wait for approval
785
 
    approval_duration: datetime.timedelta(); Duration of one approval
786
 
    checker:    subprocess.Popen(); a running checker process used
787
 
                                    to see if the client lives.
788
 
                                    'None' if no process is running.
789
 
    checker_callback_tag: a GLib event source tag, or None
790
 
    checker_command: string; External command which is run to check
791
 
                     if client lives.  %() expansions are done at
 
59
    name:      string; from the config file, used in log messages
 
60
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
61
                 uniquely identify the client
 
62
    secret:    bytestring; sent verbatim (over TLS) to client
 
63
    fqdn:      string (FQDN); available for use by the checker command
 
64
    created:   datetime.datetime()
 
65
    last_seen: datetime.datetime() or None if not yet seen
 
66
    timeout:   datetime.timedelta(); How long from last_seen until
 
67
                                     this client is invalid
 
68
    interval:  datetime.timedelta(); How often to start a new checker
 
69
    stop_hook: If set, called by stop() as stop_hook(self)
 
70
    checker:   subprocess.Popen(); a running checker process used
 
71
                                   to see if the client lives.
 
72
                                   Is None if no process is running.
 
73
    checker_initiator_tag: a gobject event source tag, or None
 
74
    stop_initiator_tag:    - '' -
 
75
    checker_callback_tag:  - '' -
 
76
    checker_command: string; External command which is run to check if
 
77
                     client lives.  %()s expansions are done at
792
78
                     runtime with vars(self) as dict, so that for
793
79
                     instance %(name)s can be used in the command.
794
 
    checker_initiator_tag: a GLib event source tag, or None
795
 
    created:    datetime.datetime(); (UTC) object creation
796
 
    client_structure: Object describing what attributes a client has
797
 
                      and is used for storing the client at exit
798
 
    current_checker_command: string; current running checker_command
799
 
    disable_initiator_tag: a GLib event source tag, or None
800
 
    enabled:    bool()
801
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
802
 
                 uniquely identify the client
803
 
    host:       string; available for use by the checker command
804
 
    interval:   datetime.timedelta(); How often to start a new checker
805
 
    last_approval_request: datetime.datetime(); (UTC) or None
806
 
    last_checked_ok: datetime.datetime(); (UTC) or None
807
 
    last_checker_status: integer between 0 and 255 reflecting exit
808
 
                         status of last checker. -1 reflects crashed
809
 
                         checker, -2 means no checker completed yet.
810
 
    last_checker_signal: The signal which killed the last checker, if
811
 
                         last_checker_status is -1
812
 
    last_enabled: datetime.datetime(); (UTC) or None
813
 
    name:       string; from the config file, used in log messages and
814
 
                        D-Bus identifiers
815
 
    secret:     bytestring; sent verbatim (over TLS) to client
816
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
817
 
                                      until this client is disabled
818
 
    extended_timeout:   extra long timeout when secret has been sent
819
 
    runtime_expansions: Allowed attributes for runtime expansion.
820
 
    expires:    datetime.datetime(); time (UTC) when a client will be
821
 
                disabled, or None
822
 
    server_settings: The server_settings dict from main()
 
80
    Private attibutes:
 
81
    _timeout: Real variable for 'timeout'
 
82
    _interval: Real variable for 'interval'
 
83
    _timeout_milliseconds: Used by gobject.timeout_add()
 
84
    _interval_milliseconds: - '' -
823
85
    """
824
 
 
825
 
    runtime_expansions = ("approval_delay", "approval_duration",
826
 
                          "created", "enabled", "expires",
827
 
                          "fingerprint", "host", "interval",
828
 
                          "last_approval_request", "last_checked_ok",
829
 
                          "last_enabled", "name", "timeout")
830
 
    client_defaults = {
831
 
        "timeout": "PT5M",
832
 
        "extended_timeout": "PT15M",
833
 
        "interval": "PT2M",
834
 
        "checker": "fping -q -- %%(host)s",
835
 
        "host": "",
836
 
        "approval_delay": "PT0S",
837
 
        "approval_duration": "PT1S",
838
 
        "approved_by_default": "True",
839
 
        "enabled": "True",
840
 
    }
841
 
 
842
 
    @staticmethod
843
 
    def config_parser(config):
844
 
        """Construct a new dict of client settings of this form:
845
 
        { client_name: {setting_name: value, ...}, ...}
846
 
        with exceptions for any special settings as defined above.
847
 
        NOTE: Must be a pure function. Must return the same result
848
 
        value given the same arguments.
849
 
        """
850
 
        settings = {}
851
 
        for client_name in config.sections():
852
 
            section = dict(config.items(client_name))
853
 
            client = settings[client_name] = {}
854
 
 
855
 
            client["host"] = section["host"]
856
 
            # Reformat values from string types to Python types
857
 
            client["approved_by_default"] = config.getboolean(
858
 
                client_name, "approved_by_default")
859
 
            client["enabled"] = config.getboolean(client_name,
860
 
                                                  "enabled")
861
 
 
862
 
            # Uppercase and remove spaces from fingerprint for later
863
 
            # comparison purposes with return value from the
864
 
            # fingerprint() function
865
 
            client["fingerprint"] = (section["fingerprint"].upper()
866
 
                                     .replace(" ", ""))
867
 
            if "secret" in section:
868
 
                client["secret"] = codecs.decode(section["secret"]
869
 
                                                 .encode("utf-8"),
870
 
                                                 "base64")
871
 
            elif "secfile" in section:
872
 
                with open(os.path.expanduser(os.path.expandvars
873
 
                                             (section["secfile"])),
874
 
                          "rb") as secfile:
875
 
                    client["secret"] = secfile.read()
876
 
            else:
877
 
                raise TypeError("No secret or secfile for section {}"
878
 
                                .format(section))
879
 
            client["timeout"] = string_to_delta(section["timeout"])
880
 
            client["extended_timeout"] = string_to_delta(
881
 
                section["extended_timeout"])
882
 
            client["interval"] = string_to_delta(section["interval"])
883
 
            client["approval_delay"] = string_to_delta(
884
 
                section["approval_delay"])
885
 
            client["approval_duration"] = string_to_delta(
886
 
                section["approval_duration"])
887
 
            client["checker_command"] = section["checker"]
888
 
            client["last_approval_request"] = None
889
 
            client["last_checked_ok"] = None
890
 
            client["last_checker_status"] = -2
891
 
 
892
 
        return settings
893
 
 
894
 
    def __init__(self, settings, name=None, server_settings=None):
 
86
    def _set_timeout(self, timeout):
 
87
        "Setter function for 'timeout' attribute"
 
88
        self._timeout = timeout
 
89
        self._timeout_milliseconds = ((self.timeout.days
 
90
                                       * 24 * 60 * 60 * 1000)
 
91
                                      + (self.timeout.seconds * 1000)
 
92
                                      + (self.timeout.microseconds
 
93
                                         // 1000))
 
94
    timeout = property(lambda self: self._timeout,
 
95
                       _set_timeout)
 
96
    del _set_timeout
 
97
    def _set_interval(self, interval):
 
98
        "Setter function for 'interval' attribute"
 
99
        self._interval = interval
 
100
        self._interval_milliseconds = ((self.interval.days
 
101
                                        * 24 * 60 * 60 * 1000)
 
102
                                       + (self.interval.seconds
 
103
                                          * 1000)
 
104
                                       + (self.interval.microseconds
 
105
                                          // 1000))
 
106
    interval = property(lambda self: self._interval,
 
107
                        _set_interval)
 
108
    del _set_interval
 
109
    def __init__(self, name=None, options=None, stop_hook=None,
 
110
                 fingerprint=None, secret=None, secfile=None, fqdn=None,
 
111
                 timeout=None, interval=-1, checker=None):
895
112
        self.name = name
896
 
        if server_settings is None:
897
 
            server_settings = {}
898
 
        self.server_settings = server_settings
899
 
        # adding all client settings
900
 
        for setting, value in settings.items():
901
 
            setattr(self, setting, value)
902
 
 
903
 
        if self.enabled:
904
 
            if not hasattr(self, "last_enabled"):
905
 
                self.last_enabled = datetime.datetime.utcnow()
906
 
            if not hasattr(self, "expires"):
907
 
                self.expires = (datetime.datetime.utcnow()
908
 
                                + self.timeout)
909
 
        else:
910
 
            self.last_enabled = None
911
 
            self.expires = None
912
 
 
913
 
        logger.debug("Creating client %r", self.name)
914
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
915
 
        self.created = settings.get("created",
916
 
                                    datetime.datetime.utcnow())
917
 
 
918
 
        # attributes specific for this server instance
 
113
        # Uppercase and remove spaces from fingerprint
 
114
        # for later comparison purposes with return value of
 
115
        # the fingerprint() function
 
116
        self.fingerprint = fingerprint.upper().replace(u" ", u"")
 
117
        if secret:
 
118
            self.secret = secret.decode(u"base64")
 
119
        elif secfile:
 
120
            sf = open(secfile)
 
121
            self.secret = sf.read()
 
122
            sf.close()
 
123
        else:
 
124
            raise RuntimeError(u"No secret or secfile for client %s"
 
125
                               % self.name)
 
126
        self.fqdn = fqdn                # string
 
127
        self.created = datetime.datetime.now()
 
128
        self.last_seen = None
 
129
        if timeout is None:
 
130
            timeout = options.timeout
 
131
        self.timeout = timeout
 
132
        if interval == -1:
 
133
            interval = options.interval
 
134
        else:
 
135
            interval = string_to_delta(interval)
 
136
        self.interval = interval
 
137
        self.stop_hook = stop_hook
919
138
        self.checker = None
920
139
        self.checker_initiator_tag = None
921
 
        self.disable_initiator_tag = None
 
140
        self.stop_initiator_tag = None
922
141
        self.checker_callback_tag = None
923
 
        self.current_checker_command = None
924
 
        self.approved = None
925
 
        self.approvals_pending = 0
926
 
        self.changedstate = multiprocessing_manager.Condition(
927
 
            multiprocessing_manager.Lock())
928
 
        self.client_structure = [attr
929
 
                                 for attr in self.__dict__.keys()
930
 
                                 if not attr.startswith("_")]
931
 
        self.client_structure.append("client_structure")
932
 
 
933
 
        for name, t in inspect.getmembers(
934
 
                type(self), lambda obj: isinstance(obj, property)):
935
 
            if not name.startswith("_"):
936
 
                self.client_structure.append(name)
937
 
 
938
 
    # Send notice to process children that client state has changed
939
 
    def send_changedstate(self):
940
 
        with self.changedstate:
941
 
            self.changedstate.notify_all()
942
 
 
943
 
    def enable(self):
944
 
        """Start this client's checker and timeout hooks"""
945
 
        if getattr(self, "enabled", False):
946
 
            # Already enabled
947
 
            return
948
 
        self.expires = datetime.datetime.utcnow() + self.timeout
949
 
        self.enabled = True
950
 
        self.last_enabled = datetime.datetime.utcnow()
951
 
        self.init_checker()
952
 
        self.send_changedstate()
953
 
 
954
 
    def disable(self, quiet=True):
955
 
        """Disable this client."""
956
 
        if not getattr(self, "enabled", False):
957
 
            return False
958
 
        if not quiet:
959
 
            logger.info("Disabling client %s", self.name)
960
 
        if getattr(self, "disable_initiator_tag", None) is not None:
961
 
            GLib.source_remove(self.disable_initiator_tag)
962
 
            self.disable_initiator_tag = None
963
 
        self.expires = None
964
 
        if getattr(self, "checker_initiator_tag", None) is not None:
965
 
            GLib.source_remove(self.checker_initiator_tag)
966
 
            self.checker_initiator_tag = None
967
 
        self.stop_checker()
968
 
        self.enabled = False
969
 
        if not quiet:
970
 
            self.send_changedstate()
971
 
        # Do not run this again if called by a GLib.timeout_add
972
 
        return False
973
 
 
974
 
    def __del__(self):
975
 
        self.disable()
976
 
 
977
 
    def init_checker(self):
 
142
        self.check_command = checker
 
143
    def start(self):
 
144
        """Start this clients checker and timeout hooks"""
978
145
        # Schedule a new checker to be started an 'interval' from now,
979
146
        # and every interval from then on.
980
 
        if self.checker_initiator_tag is not None:
981
 
            GLib.source_remove(self.checker_initiator_tag)
982
 
        self.checker_initiator_tag = GLib.timeout_add(
983
 
            int(self.interval.total_seconds() * 1000),
984
 
            self.start_checker)
985
 
        # Schedule a disable() when 'timeout' has passed
986
 
        if self.disable_initiator_tag is not None:
987
 
            GLib.source_remove(self.disable_initiator_tag)
988
 
        self.disable_initiator_tag = GLib.timeout_add(
989
 
            int(self.timeout.total_seconds() * 1000), self.disable)
 
147
        self.checker_initiator_tag = gobject.timeout_add\
 
148
                                     (self._interval_milliseconds,
 
149
                                      self.start_checker)
990
150
        # Also start a new checker *right now*.
991
151
        self.start_checker()
992
 
 
993
 
    def checker_callback(self, source, condition, connection,
994
 
                         command):
 
152
        # Schedule a stop() when 'timeout' has passed
 
153
        self.stop_initiator_tag = gobject.timeout_add\
 
154
                                  (self._timeout_milliseconds,
 
155
                                   self.stop)
 
156
    def stop(self):
 
157
        """Stop this client.
 
158
        The possibility that this client might be restarted is left
 
159
        open, but not currently used."""
 
160
        logger.debug(u"Stopping client %s", self.name)
 
161
        self.secret = None
 
162
        if self.stop_initiator_tag:
 
163
            gobject.source_remove(self.stop_initiator_tag)
 
164
            self.stop_initiator_tag = None
 
165
        if self.checker_initiator_tag:
 
166
            gobject.source_remove(self.checker_initiator_tag)
 
167
            self.checker_initiator_tag = None
 
168
        self.stop_checker()
 
169
        if self.stop_hook:
 
170
            self.stop_hook(self)
 
171
        # Do not run this again if called by a gobject.timeout_add
 
172
        return False
 
173
    def __del__(self):
 
174
        # Some code duplication here and in stop()
 
175
        if hasattr(self, "stop_initiator_tag") \
 
176
               and self.stop_initiator_tag:
 
177
            gobject.source_remove(self.stop_initiator_tag)
 
178
            self.stop_initiator_tag = None
 
179
        if hasattr(self, "checker_initiator_tag") \
 
180
               and self.checker_initiator_tag:
 
181
            gobject.source_remove(self.checker_initiator_tag)
 
182
            self.checker_initiator_tag = None
 
183
        self.stop_checker()
 
184
    def checker_callback(self, pid, condition):
995
185
        """The checker has completed, so take appropriate actions."""
996
 
        self.checker_callback_tag = None
997
 
        self.checker = None
998
 
        # Read return code from connection (see call_pipe)
999
 
        returncode = connection.recv()
1000
 
        connection.close()
1001
 
 
1002
 
        if returncode >= 0:
1003
 
            self.last_checker_status = returncode
1004
 
            self.last_checker_signal = None
1005
 
            if self.last_checker_status == 0:
1006
 
                logger.info("Checker for %(name)s succeeded",
1007
 
                            vars(self))
1008
 
                self.checked_ok()
1009
 
            else:
1010
 
                logger.info("Checker for %(name)s failed", vars(self))
1011
 
        else:
1012
 
            self.last_checker_status = -1
1013
 
            self.last_checker_signal = -returncode
1014
 
            logger.warning("Checker for %(name)s crashed?",
 
186
        now = datetime.datetime.now()
 
187
        if os.WIFEXITED(condition) \
 
188
               and (os.WEXITSTATUS(condition) == 0):
 
189
            logger.debug(u"Checker for %(name)s succeeded",
 
190
                         vars(self))
 
191
            self.last_seen = now
 
192
            gobject.source_remove(self.stop_initiator_tag)
 
193
            self.stop_initiator_tag = gobject.timeout_add\
 
194
                                      (self._timeout_milliseconds,
 
195
                                       self.stop)
 
196
        if not os.WIFEXITED(condition):
 
197
            logger.warning(u"Checker for %(name)s crashed?",
1015
198
                           vars(self))
1016
 
        return False
1017
 
 
1018
 
    def checked_ok(self):
1019
 
        """Assert that the client has been seen, alive and well."""
1020
 
        self.last_checked_ok = datetime.datetime.utcnow()
1021
 
        self.last_checker_status = 0
1022
 
        self.last_checker_signal = None
1023
 
        self.bump_timeout()
1024
 
 
1025
 
    def bump_timeout(self, timeout=None):
1026
 
        """Bump up the timeout for this client."""
1027
 
        if timeout is None:
1028
 
            timeout = self.timeout
1029
 
        if self.disable_initiator_tag is not None:
1030
 
            GLib.source_remove(self.disable_initiator_tag)
1031
 
            self.disable_initiator_tag = None
1032
 
        if getattr(self, "enabled", False):
1033
 
            self.disable_initiator_tag = GLib.timeout_add(
1034
 
                int(timeout.total_seconds() * 1000), self.disable)
1035
 
            self.expires = datetime.datetime.utcnow() + timeout
1036
 
 
1037
 
    def need_approval(self):
1038
 
        self.last_approval_request = datetime.datetime.utcnow()
1039
 
 
 
199
        else:
 
200
            logger.debug(u"Checker for %(name)s failed",
 
201
                         vars(self))
 
202
            self.checker = None
 
203
        self.checker_callback_tag = None
1040
204
    def start_checker(self):
1041
205
        """Start a new checker subprocess if one is not running.
1042
 
 
1043
206
        If a checker already exists, leave it running and do
1044
207
        nothing."""
1045
 
        # The reason for not killing a running checker is that if we
1046
 
        # did that, and if a checker (for some reason) started running
1047
 
        # slowly and taking more than 'interval' time, then the client
1048
 
        # would inevitably timeout, since no checker would get a
1049
 
        # chance to run to completion.  If we instead leave running
1050
 
        # checkers alone, the checker would have to take more time
1051
 
        # than 'timeout' for the client to be disabled, which is as it
1052
 
        # should be.
1053
 
 
1054
 
        if self.checker is not None and not self.checker.is_alive():
1055
 
            logger.warning("Checker was not alive; joining")
1056
 
            self.checker.join()
1057
 
            self.checker = None
1058
 
        # Start a new checker if needed
1059
208
        if self.checker is None:
1060
 
            # Escape attributes for the shell
1061
 
            escaped_attrs = {
1062
 
                attr: re.escape(str(getattr(self, attr)))
1063
 
                for attr in self.runtime_expansions}
1064
 
            try:
1065
 
                command = self.checker_command % escaped_attrs
1066
 
            except TypeError as error:
1067
 
                logger.error('Could not format string "%s"',
1068
 
                             self.checker_command,
1069
 
                             exc_info=error)
1070
 
                return True     # Try again later
1071
 
            self.current_checker_command = command
1072
 
            logger.info("Starting checker %r for %s", command,
1073
 
                        self.name)
1074
 
            # We don't need to redirect stdout and stderr, since
1075
 
            # in normal mode, that is already done by daemon(),
1076
 
            # and in debug mode we don't want to.  (Stdin is
1077
 
            # always replaced by /dev/null.)
1078
 
            # The exception is when not debugging but nevertheless
1079
 
            # running in the foreground; use the previously
1080
 
            # created wnull.
1081
 
            popen_args = {"close_fds": True,
1082
 
                          "shell": True,
1083
 
                          "cwd": "/"}
1084
 
            if (not self.server_settings["debug"]
1085
 
                and self.server_settings["foreground"]):
1086
 
                popen_args.update({"stdout": wnull,
1087
 
                                   "stderr": wnull})
1088
 
            pipe = multiprocessing.Pipe(duplex=False)
1089
 
            self.checker = multiprocessing.Process(
1090
 
                target=call_pipe,
1091
 
                args=(pipe[1], subprocess.call, command),
1092
 
                kwargs=popen_args)
1093
 
            self.checker.start()
1094
 
            self.checker_callback_tag = GLib.io_add_watch(
1095
 
                pipe[0].fileno(), GLib.IO_IN,
1096
 
                self.checker_callback, pipe[0], command)
1097
 
        # Re-run this periodically if run by GLib.timeout_add
 
209
            logger.debug(u"Starting checker for %s",
 
210
                         self.name)
 
211
            try:
 
212
                command = self.check_command % self.fqdn
 
213
            except TypeError:
 
214
                escaped_attrs = dict((key, re.escape(str(val)))
 
215
                                     for key, val in
 
216
                                     vars(self).iteritems())
 
217
                try:
 
218
                    command = self.check_command % escaped_attrs
 
219
                except TypeError, error:
 
220
                    logger.critical(u'Could not format string "%s": %s',
 
221
                                    self.check_command, error)
 
222
                    return True # Try again later
 
223
            try:
 
224
                self.checker = subprocess.\
 
225
                               Popen(command,
 
226
                                     stdout=subprocess.PIPE,
 
227
                                     close_fds=True, shell=True,
 
228
                                     cwd="/")
 
229
                self.checker_callback_tag = gobject.\
 
230
                                            child_watch_add(self.checker.pid,
 
231
                                                            self.\
 
232
                                                            checker_callback)
 
233
            except subprocess.OSError, error:
 
234
                logger.error(u"Failed to start subprocess: %s",
 
235
                             error)
 
236
        # Re-run this periodically if run by gobject.timeout_add
1098
237
        return True
1099
 
 
1100
238
    def stop_checker(self):
1101
239
        """Force the checker process, if any, to stop."""
1102
 
        if self.checker_callback_tag:
1103
 
            GLib.source_remove(self.checker_callback_tag)
1104
 
            self.checker_callback_tag = None
1105
 
        if getattr(self, "checker", None) is None:
 
240
        if not hasattr(self, "checker") or self.checker is None:
1106
241
            return
1107
 
        logger.debug("Stopping checker for %(name)s", vars(self))
1108
 
        self.checker.terminate()
 
242
        gobject.source_remove(self.checker_callback_tag)
 
243
        self.checker_callback_tag = None
 
244
        os.kill(self.checker.pid, signal.SIGTERM)
 
245
        if self.checker.poll() is None:
 
246
            os.kill(self.checker.pid, signal.SIGKILL)
1109
247
        self.checker = None
1110
 
 
1111
 
 
1112
 
def dbus_service_property(dbus_interface,
1113
 
                          signature="v",
1114
 
                          access="readwrite",
1115
 
                          byte_arrays=False):
1116
 
    """Decorators for marking methods of a DBusObjectWithProperties to
1117
 
    become properties on the D-Bus.
1118
 
 
1119
 
    The decorated method will be called with no arguments by "Get"
1120
 
    and with one argument by "Set".
1121
 
 
1122
 
    The parameters, where they are supported, are the same as
1123
 
    dbus.service.method, except there is only "signature", since the
1124
 
    type from Get() and the type sent to Set() is the same.
1125
 
    """
1126
 
    # Encoding deeply encoded byte arrays is not supported yet by the
1127
 
    # "Set" method, so we fail early here:
1128
 
    if byte_arrays and signature != "ay":
1129
 
        raise ValueError("Byte arrays not supported for non-'ay'"
1130
 
                         " signature {!r}".format(signature))
1131
 
 
1132
 
    def decorator(func):
1133
 
        func._dbus_is_property = True
1134
 
        func._dbus_interface = dbus_interface
1135
 
        func._dbus_signature = signature
1136
 
        func._dbus_access = access
1137
 
        func._dbus_name = func.__name__
1138
 
        if func._dbus_name.endswith("_dbus_property"):
1139
 
            func._dbus_name = func._dbus_name[:-14]
1140
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays}
1141
 
        return func
1142
 
 
1143
 
    return decorator
1144
 
 
1145
 
 
1146
 
def dbus_interface_annotations(dbus_interface):
1147
 
    """Decorator for marking functions returning interface annotations
1148
 
 
1149
 
    Usage:
1150
 
 
1151
 
    @dbus_interface_annotations("org.example.Interface")
1152
 
    def _foo(self):  # Function name does not matter
1153
 
        return {"org.freedesktop.DBus.Deprecated": "true",
1154
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
1155
 
                    "false"}
1156
 
    """
1157
 
 
1158
 
    def decorator(func):
1159
 
        func._dbus_is_interface = True
1160
 
        func._dbus_interface = dbus_interface
1161
 
        func._dbus_name = dbus_interface
1162
 
        return func
1163
 
 
1164
 
    return decorator
1165
 
 
1166
 
 
1167
 
def dbus_annotations(annotations):
1168
 
    """Decorator to annotate D-Bus methods, signals or properties
1169
 
    Usage:
1170
 
 
1171
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1172
 
                       "org.freedesktop.DBus.Property."
1173
 
                       "EmitsChangedSignal": "false"})
1174
 
    @dbus_service_property("org.example.Interface", signature="b",
1175
 
                           access="r")
1176
 
    def Property_dbus_property(self):
1177
 
        return dbus.Boolean(False)
1178
 
 
1179
 
    See also the DBusObjectWithAnnotations class.
1180
 
    """
1181
 
 
1182
 
    def decorator(func):
1183
 
        func._dbus_annotations = annotations
1184
 
        return func
1185
 
 
1186
 
    return decorator
1187
 
 
1188
 
 
1189
 
class DBusPropertyException(dbus.exceptions.DBusException):
1190
 
    """A base class for D-Bus property-related exceptions
1191
 
    """
1192
 
    pass
1193
 
 
1194
 
 
1195
 
class DBusPropertyAccessException(DBusPropertyException):
1196
 
    """A property's access permissions disallows an operation.
1197
 
    """
1198
 
    pass
1199
 
 
1200
 
 
1201
 
class DBusPropertyNotFound(DBusPropertyException):
1202
 
    """An attempt was made to access a non-existing property.
1203
 
    """
1204
 
    pass
1205
 
 
1206
 
 
1207
 
class DBusObjectWithAnnotations(dbus.service.Object):
1208
 
    """A D-Bus object with annotations.
1209
 
 
1210
 
    Classes inheriting from this can use the dbus_annotations
1211
 
    decorator to add annotations to methods or signals.
1212
 
    """
1213
 
 
1214
 
    @staticmethod
1215
 
    def _is_dbus_thing(thing):
1216
 
        """Returns a function testing if an attribute is a D-Bus thing
1217
 
 
1218
 
        If called like _is_dbus_thing("method") it returns a function
1219
 
        suitable for use as predicate to inspect.getmembers().
1220
 
        """
1221
 
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1222
 
                                   False)
1223
 
 
1224
 
    def _get_all_dbus_things(self, thing):
1225
 
        """Returns a generator of (name, attribute) pairs
1226
 
        """
1227
 
        return ((getattr(athing.__get__(self), "_dbus_name", name),
1228
 
                 athing.__get__(self))
1229
 
                for cls in self.__class__.__mro__
1230
 
                for name, athing in
1231
 
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
1232
 
 
1233
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1234
 
                         out_signature="s",
1235
 
                         path_keyword='object_path',
1236
 
                         connection_keyword='connection')
1237
 
    def Introspect(self, object_path, connection):
1238
 
        """Overloading of standard D-Bus method.
1239
 
 
1240
 
        Inserts annotation tags on methods and signals.
1241
 
        """
1242
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
1243
 
                                                   connection)
1244
 
        try:
1245
 
            document = xml.dom.minidom.parseString(xmlstring)
1246
 
 
1247
 
            for if_tag in document.getElementsByTagName("interface"):
1248
 
                # Add annotation tags
1249
 
                for typ in ("method", "signal"):
1250
 
                    for tag in if_tag.getElementsByTagName(typ):
1251
 
                        annots = dict()
1252
 
                        for name, prop in (self.
1253
 
                                           _get_all_dbus_things(typ)):
1254
 
                            if (name == tag.getAttribute("name")
1255
 
                                and prop._dbus_interface
1256
 
                                == if_tag.getAttribute("name")):
1257
 
                                annots.update(getattr(
1258
 
                                    prop, "_dbus_annotations", {}))
1259
 
                        for name, value in annots.items():
1260
 
                            ann_tag = document.createElement(
1261
 
                                "annotation")
1262
 
                            ann_tag.setAttribute("name", name)
1263
 
                            ann_tag.setAttribute("value", value)
1264
 
                            tag.appendChild(ann_tag)
1265
 
                # Add interface annotation tags
1266
 
                for annotation, value in dict(
1267
 
                    itertools.chain.from_iterable(
1268
 
                        annotations().items()
1269
 
                        for name, annotations
1270
 
                        in self._get_all_dbus_things("interface")
1271
 
                        if name == if_tag.getAttribute("name")
1272
 
                        )).items():
1273
 
                    ann_tag = document.createElement("annotation")
1274
 
                    ann_tag.setAttribute("name", annotation)
1275
 
                    ann_tag.setAttribute("value", value)
1276
 
                    if_tag.appendChild(ann_tag)
1277
 
                # Fix argument name for the Introspect method itself
1278
 
                if (if_tag.getAttribute("name")
1279
 
                    == dbus.INTROSPECTABLE_IFACE):
1280
 
                    for cn in if_tag.getElementsByTagName("method"):
1281
 
                        if cn.getAttribute("name") == "Introspect":
1282
 
                            for arg in cn.getElementsByTagName("arg"):
1283
 
                                if (arg.getAttribute("direction")
1284
 
                                    == "out"):
1285
 
                                    arg.setAttribute("name",
1286
 
                                                     "xml_data")
1287
 
            xmlstring = document.toxml("utf-8")
1288
 
            document.unlink()
1289
 
        except (AttributeError, xml.dom.DOMException,
1290
 
                xml.parsers.expat.ExpatError) as error:
1291
 
            logger.error("Failed to override Introspection method",
1292
 
                         exc_info=error)
1293
 
        return xmlstring
1294
 
 
1295
 
 
1296
 
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1297
 
    """A D-Bus object with properties.
1298
 
 
1299
 
    Classes inheriting from this can use the dbus_service_property
1300
 
    decorator to expose methods as D-Bus properties.  It exposes the
1301
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
1302
 
    """
1303
 
 
1304
 
    def _get_dbus_property(self, interface_name, property_name):
1305
 
        """Returns a bound method if one exists which is a D-Bus
1306
 
        property with the specified name and interface.
1307
 
        """
1308
 
        for cls in self.__class__.__mro__:
1309
 
            for name, value in inspect.getmembers(
1310
 
                    cls, self._is_dbus_thing("property")):
1311
 
                if (value._dbus_name == property_name
1312
 
                    and value._dbus_interface == interface_name):
1313
 
                    return value.__get__(self)
1314
 
 
1315
 
        # No such property
1316
 
        raise DBusPropertyNotFound("{}:{}.{}".format(
1317
 
            self.dbus_object_path, interface_name, property_name))
1318
 
 
1319
 
    @classmethod
1320
 
    def _get_all_interface_names(cls):
1321
 
        """Get a sequence of all interfaces supported by an object"""
1322
 
        return (name for name in set(getattr(getattr(x, attr),
1323
 
                                             "_dbus_interface", None)
1324
 
                                     for x in (inspect.getmro(cls))
1325
 
                                     for attr in dir(x))
1326
 
                if name is not None)
1327
 
 
1328
 
    @dbus.service.method(dbus.PROPERTIES_IFACE,
1329
 
                         in_signature="ss",
1330
 
                         out_signature="v")
1331
 
    def Get(self, interface_name, property_name):
1332
 
        """Standard D-Bus property Get() method, see D-Bus standard.
1333
 
        """
1334
 
        prop = self._get_dbus_property(interface_name, property_name)
1335
 
        if prop._dbus_access == "write":
1336
 
            raise DBusPropertyAccessException(property_name)
1337
 
        value = prop()
1338
 
        if not hasattr(value, "variant_level"):
1339
 
            return value
1340
 
        return type(value)(value, variant_level=value.variant_level+1)
1341
 
 
1342
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1343
 
    def Set(self, interface_name, property_name, value):
1344
 
        """Standard D-Bus property Set() method, see D-Bus standard.
1345
 
        """
1346
 
        prop = self._get_dbus_property(interface_name, property_name)
1347
 
        if prop._dbus_access == "read":
1348
 
            raise DBusPropertyAccessException(property_name)
1349
 
        if prop._dbus_get_args_options["byte_arrays"]:
1350
 
            # The byte_arrays option is not supported yet on
1351
 
            # signatures other than "ay".
1352
 
            if prop._dbus_signature != "ay":
1353
 
                raise ValueError("Byte arrays not supported for non-"
1354
 
                                 "'ay' signature {!r}"
1355
 
                                 .format(prop._dbus_signature))
1356
 
            value = dbus.ByteArray(b''.join(chr(byte)
1357
 
                                            for byte in value))
1358
 
        prop(value)
1359
 
 
1360
 
    @dbus.service.method(dbus.PROPERTIES_IFACE,
1361
 
                         in_signature="s",
1362
 
                         out_signature="a{sv}")
1363
 
    def GetAll(self, interface_name):
1364
 
        """Standard D-Bus property GetAll() method, see D-Bus
1365
 
        standard.
1366
 
 
1367
 
        Note: Will not include properties with access="write".
1368
 
        """
1369
 
        properties = {}
1370
 
        for name, prop in self._get_all_dbus_things("property"):
1371
 
            if (interface_name
1372
 
                and interface_name != prop._dbus_interface):
1373
 
                # Interface non-empty but did not match
1374
 
                continue
1375
 
            # Ignore write-only properties
1376
 
            if prop._dbus_access == "write":
1377
 
                continue
1378
 
            value = prop()
1379
 
            if not hasattr(value, "variant_level"):
1380
 
                properties[name] = value
1381
 
                continue
1382
 
            properties[name] = type(value)(
1383
 
                value, variant_level=value.variant_level + 1)
1384
 
        return dbus.Dictionary(properties, signature="sv")
1385
 
 
1386
 
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1387
 
    def PropertiesChanged(self, interface_name, changed_properties,
1388
 
                          invalidated_properties):
1389
 
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
1390
 
        standard.
1391
 
        """
1392
 
        pass
1393
 
 
1394
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1395
 
                         out_signature="s",
1396
 
                         path_keyword='object_path',
1397
 
                         connection_keyword='connection')
1398
 
    def Introspect(self, object_path, connection):
1399
 
        """Overloading of standard D-Bus method.
1400
 
 
1401
 
        Inserts property tags and interface annotation tags.
1402
 
        """
1403
 
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
1404
 
                                                         object_path,
1405
 
                                                         connection)
1406
 
        try:
1407
 
            document = xml.dom.minidom.parseString(xmlstring)
1408
 
 
1409
 
            def make_tag(document, name, prop):
1410
 
                e = document.createElement("property")
1411
 
                e.setAttribute("name", name)
1412
 
                e.setAttribute("type", prop._dbus_signature)
1413
 
                e.setAttribute("access", prop._dbus_access)
1414
 
                return e
1415
 
 
1416
 
            for if_tag in document.getElementsByTagName("interface"):
1417
 
                # Add property tags
1418
 
                for tag in (make_tag(document, name, prop)
1419
 
                            for name, prop
1420
 
                            in self._get_all_dbus_things("property")
1421
 
                            if prop._dbus_interface
1422
 
                            == if_tag.getAttribute("name")):
1423
 
                    if_tag.appendChild(tag)
1424
 
                # Add annotation tags for properties
1425
 
                for tag in if_tag.getElementsByTagName("property"):
1426
 
                    annots = dict()
1427
 
                    for name, prop in self._get_all_dbus_things(
1428
 
                            "property"):
1429
 
                        if (name == tag.getAttribute("name")
1430
 
                            and prop._dbus_interface
1431
 
                            == if_tag.getAttribute("name")):
1432
 
                            annots.update(getattr(
1433
 
                                prop, "_dbus_annotations", {}))
1434
 
                    for name, value in annots.items():
1435
 
                        ann_tag = document.createElement(
1436
 
                            "annotation")
1437
 
                        ann_tag.setAttribute("name", name)
1438
 
                        ann_tag.setAttribute("value", value)
1439
 
                        tag.appendChild(ann_tag)
1440
 
                # Add the names to the return values for the
1441
 
                # "org.freedesktop.DBus.Properties" methods
1442
 
                if (if_tag.getAttribute("name")
1443
 
                    == "org.freedesktop.DBus.Properties"):
1444
 
                    for cn in if_tag.getElementsByTagName("method"):
1445
 
                        if cn.getAttribute("name") == "Get":
1446
 
                            for arg in cn.getElementsByTagName("arg"):
1447
 
                                if (arg.getAttribute("direction")
1448
 
                                    == "out"):
1449
 
                                    arg.setAttribute("name", "value")
1450
 
                        elif cn.getAttribute("name") == "GetAll":
1451
 
                            for arg in cn.getElementsByTagName("arg"):
1452
 
                                if (arg.getAttribute("direction")
1453
 
                                    == "out"):
1454
 
                                    arg.setAttribute("name", "props")
1455
 
            xmlstring = document.toxml("utf-8")
1456
 
            document.unlink()
1457
 
        except (AttributeError, xml.dom.DOMException,
1458
 
                xml.parsers.expat.ExpatError) as error:
1459
 
            logger.error("Failed to override Introspection method",
1460
 
                         exc_info=error)
1461
 
        return xmlstring
1462
 
 
1463
 
try:
1464
 
    dbus.OBJECT_MANAGER_IFACE
1465
 
except AttributeError:
1466
 
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1467
 
 
1468
 
 
1469
 
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1470
 
    """A D-Bus object with an ObjectManager.
1471
 
 
1472
 
    Classes inheriting from this exposes the standard
1473
 
    GetManagedObjects call and the InterfacesAdded and
1474
 
    InterfacesRemoved signals on the standard
1475
 
    "org.freedesktop.DBus.ObjectManager" interface.
1476
 
 
1477
 
    Note: No signals are sent automatically; they must be sent
1478
 
    manually.
1479
 
    """
1480
 
    @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1481
 
                         out_signature="a{oa{sa{sv}}}")
1482
 
    def GetManagedObjects(self):
1483
 
        """This function must be overridden"""
1484
 
        raise NotImplementedError()
1485
 
 
1486
 
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1487
 
                         signature="oa{sa{sv}}")
1488
 
    def InterfacesAdded(self, object_path, interfaces_and_properties):
1489
 
        pass
1490
 
 
1491
 
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
1492
 
    def InterfacesRemoved(self, object_path, interfaces):
1493
 
        pass
1494
 
 
1495
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1496
 
                         out_signature="s",
1497
 
                         path_keyword='object_path',
1498
 
                         connection_keyword='connection')
1499
 
    def Introspect(self, object_path, connection):
1500
 
        """Overloading of standard D-Bus method.
1501
 
 
1502
 
        Override return argument name of GetManagedObjects to be
1503
 
        "objpath_interfaces_and_properties"
1504
 
        """
1505
 
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
1506
 
                                                         object_path,
1507
 
                                                         connection)
1508
 
        try:
1509
 
            document = xml.dom.minidom.parseString(xmlstring)
1510
 
 
1511
 
            for if_tag in document.getElementsByTagName("interface"):
1512
 
                # Fix argument name for the GetManagedObjects method
1513
 
                if (if_tag.getAttribute("name")
1514
 
                    == dbus.OBJECT_MANAGER_IFACE):
1515
 
                    for cn in if_tag.getElementsByTagName("method"):
1516
 
                        if (cn.getAttribute("name")
1517
 
                            == "GetManagedObjects"):
1518
 
                            for arg in cn.getElementsByTagName("arg"):
1519
 
                                if (arg.getAttribute("direction")
1520
 
                                    == "out"):
1521
 
                                    arg.setAttribute(
1522
 
                                        "name",
1523
 
                                        "objpath_interfaces"
1524
 
                                        "_and_properties")
1525
 
            xmlstring = document.toxml("utf-8")
1526
 
            document.unlink()
1527
 
        except (AttributeError, xml.dom.DOMException,
1528
 
                xml.parsers.expat.ExpatError) as error:
1529
 
            logger.error("Failed to override Introspection method",
1530
 
                         exc_info=error)
1531
 
        return xmlstring
1532
 
 
1533
 
 
1534
 
def datetime_to_dbus(dt, variant_level=0):
1535
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1536
 
    if dt is None:
1537
 
        return dbus.String("", variant_level=variant_level)
1538
 
    return dbus.String(dt.isoformat(), variant_level=variant_level)
1539
 
 
1540
 
 
1541
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1542
 
    """A class decorator; applied to a subclass of
1543
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1544
 
    interface names according to the "alt_interface_names" mapping.
1545
 
    Usage:
1546
 
 
1547
 
    @alternate_dbus_interfaces({"org.example.Interface":
1548
 
                                    "net.example.AlternateInterface"})
1549
 
    class SampleDBusObject(dbus.service.Object):
1550
 
        @dbus.service.method("org.example.Interface")
1551
 
        def SampleDBusMethod():
1552
 
            pass
1553
 
 
1554
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1555
 
    reachable via two interfaces: "org.example.Interface" and
1556
 
    "net.example.AlternateInterface", the latter of which will have
1557
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1558
 
    "true", unless "deprecate" is passed with a False value.
1559
 
 
1560
 
    This works for methods and signals, and also for D-Bus properties
1561
 
    (from DBusObjectWithProperties) and interfaces (from the
1562
 
    dbus_interface_annotations decorator).
1563
 
    """
1564
 
 
1565
 
    def wrapper(cls):
1566
 
        for orig_interface_name, alt_interface_name in (
1567
 
                alt_interface_names.items()):
1568
 
            attr = {}
1569
 
            interface_names = set()
1570
 
            # Go though all attributes of the class
1571
 
            for attrname, attribute in inspect.getmembers(cls):
1572
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1573
 
                # with the wrong interface name
1574
 
                if (not hasattr(attribute, "_dbus_interface")
1575
 
                    or not attribute._dbus_interface.startswith(
1576
 
                        orig_interface_name)):
1577
 
                    continue
1578
 
                # Create an alternate D-Bus interface name based on
1579
 
                # the current name
1580
 
                alt_interface = attribute._dbus_interface.replace(
1581
 
                    orig_interface_name, alt_interface_name)
1582
 
                interface_names.add(alt_interface)
1583
 
                # Is this a D-Bus signal?
1584
 
                if getattr(attribute, "_dbus_is_signal", False):
1585
 
                    # Extract the original non-method undecorated
1586
 
                    # function by black magic
1587
 
                    if sys.version_info.major == 2:
1588
 
                        nonmethod_func = (dict(
1589
 
                            zip(attribute.func_code.co_freevars,
1590
 
                                attribute.__closure__))
1591
 
                                          ["func"].cell_contents)
1592
 
                    else:
1593
 
                        nonmethod_func = (dict(
1594
 
                            zip(attribute.__code__.co_freevars,
1595
 
                                attribute.__closure__))
1596
 
                                          ["func"].cell_contents)
1597
 
                    # Create a new, but exactly alike, function
1598
 
                    # object, and decorate it to be a new D-Bus signal
1599
 
                    # with the alternate D-Bus interface name
1600
 
                    new_function = copy_function(nonmethod_func)
1601
 
                    new_function = (dbus.service.signal(
1602
 
                        alt_interface,
1603
 
                        attribute._dbus_signature)(new_function))
1604
 
                    # Copy annotations, if any
1605
 
                    try:
1606
 
                        new_function._dbus_annotations = dict(
1607
 
                            attribute._dbus_annotations)
1608
 
                    except AttributeError:
1609
 
                        pass
1610
 
 
1611
 
                    # Define a creator of a function to call both the
1612
 
                    # original and alternate functions, so both the
1613
 
                    # original and alternate signals gets sent when
1614
 
                    # the function is called
1615
 
                    def fixscope(func1, func2):
1616
 
                        """This function is a scope container to pass
1617
 
                        func1 and func2 to the "call_both" function
1618
 
                        outside of its arguments"""
1619
 
 
1620
 
                        @functools.wraps(func2)
1621
 
                        def call_both(*args, **kwargs):
1622
 
                            """This function will emit two D-Bus
1623
 
                            signals by calling func1 and func2"""
1624
 
                            func1(*args, **kwargs)
1625
 
                            func2(*args, **kwargs)
1626
 
                        # Make wrapper function look like a D-Bus
1627
 
                        # signal
1628
 
                        for name, attr in inspect.getmembers(func2):
1629
 
                            if name.startswith("_dbus_"):
1630
 
                                setattr(call_both, name, attr)
1631
 
 
1632
 
                        return call_both
1633
 
                    # Create the "call_both" function and add it to
1634
 
                    # the class
1635
 
                    attr[attrname] = fixscope(attribute, new_function)
1636
 
                # Is this a D-Bus method?
1637
 
                elif getattr(attribute, "_dbus_is_method", False):
1638
 
                    # Create a new, but exactly alike, function
1639
 
                    # object.  Decorate it to be a new D-Bus method
1640
 
                    # with the alternate D-Bus interface name.  Add it
1641
 
                    # to the class.
1642
 
                    attr[attrname] = (
1643
 
                        dbus.service.method(
1644
 
                            alt_interface,
1645
 
                            attribute._dbus_in_signature,
1646
 
                            attribute._dbus_out_signature)
1647
 
                        (copy_function(attribute)))
1648
 
                    # Copy annotations, if any
1649
 
                    try:
1650
 
                        attr[attrname]._dbus_annotations = dict(
1651
 
                            attribute._dbus_annotations)
1652
 
                    except AttributeError:
1653
 
                        pass
1654
 
                # Is this a D-Bus property?
1655
 
                elif getattr(attribute, "_dbus_is_property", False):
1656
 
                    # Create a new, but exactly alike, function
1657
 
                    # object, and decorate it to be a new D-Bus
1658
 
                    # property with the alternate D-Bus interface
1659
 
                    # name.  Add it to the class.
1660
 
                    attr[attrname] = (dbus_service_property(
1661
 
                        alt_interface, attribute._dbus_signature,
1662
 
                        attribute._dbus_access,
1663
 
                        attribute._dbus_get_args_options
1664
 
                        ["byte_arrays"])
1665
 
                                      (copy_function(attribute)))
1666
 
                    # Copy annotations, if any
1667
 
                    try:
1668
 
                        attr[attrname]._dbus_annotations = dict(
1669
 
                            attribute._dbus_annotations)
1670
 
                    except AttributeError:
1671
 
                        pass
1672
 
                # Is this a D-Bus interface?
1673
 
                elif getattr(attribute, "_dbus_is_interface", False):
1674
 
                    # Create a new, but exactly alike, function
1675
 
                    # object.  Decorate it to be a new D-Bus interface
1676
 
                    # with the alternate D-Bus interface name.  Add it
1677
 
                    # to the class.
1678
 
                    attr[attrname] = (
1679
 
                        dbus_interface_annotations(alt_interface)
1680
 
                        (copy_function(attribute)))
1681
 
            if deprecate:
1682
 
                # Deprecate all alternate interfaces
1683
 
                iname = "_AlternateDBusNames_interface_annotation{}"
1684
 
                for interface_name in interface_names:
1685
 
 
1686
 
                    @dbus_interface_annotations(interface_name)
1687
 
                    def func(self):
1688
 
                        return {"org.freedesktop.DBus.Deprecated":
1689
 
                                "true"}
1690
 
                    # Find an unused name
1691
 
                    for aname in (iname.format(i)
1692
 
                                  for i in itertools.count()):
1693
 
                        if aname not in attr:
1694
 
                            attr[aname] = func
1695
 
                            break
1696
 
            if interface_names:
1697
 
                # Replace the class with a new subclass of it with
1698
 
                # methods, signals, etc. as created above.
1699
 
                if sys.version_info.major == 2:
1700
 
                    cls = type(b"{}Alternate".format(cls.__name__),
1701
 
                               (cls, ), attr)
1702
 
                else:
1703
 
                    cls = type("{}Alternate".format(cls.__name__),
1704
 
                               (cls, ), attr)
1705
 
        return cls
1706
 
 
1707
 
    return wrapper
1708
 
 
1709
 
 
1710
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1711
 
                            "se.bsnet.fukt.Mandos"})
1712
 
class ClientDBus(Client, DBusObjectWithProperties):
1713
 
    """A Client class using D-Bus
1714
 
 
1715
 
    Attributes:
1716
 
    dbus_object_path: dbus.ObjectPath
1717
 
    bus: dbus.SystemBus()
1718
 
    """
1719
 
 
1720
 
    runtime_expansions = (Client.runtime_expansions
1721
 
                          + ("dbus_object_path", ))
1722
 
 
1723
 
    _interface = "se.recompile.Mandos.Client"
1724
 
 
1725
 
    # dbus.service.Object doesn't use super(), so we can't either.
1726
 
 
1727
 
    def __init__(self, bus=None, *args, **kwargs):
1728
 
        self.bus = bus
1729
 
        Client.__init__(self, *args, **kwargs)
1730
 
        # Only now, when this client is initialized, can it show up on
1731
 
        # the D-Bus
1732
 
        client_object_name = str(self.name).translate(
1733
 
            {ord("."): ord("_"),
1734
 
             ord("-"): ord("_")})
1735
 
        self.dbus_object_path = dbus.ObjectPath(
1736
 
            "/clients/" + client_object_name)
1737
 
        DBusObjectWithProperties.__init__(self, self.bus,
1738
 
                                          self.dbus_object_path)
1739
 
 
1740
 
    def notifychangeproperty(transform_func, dbus_name,
1741
 
                             type_func=lambda x: x,
1742
 
                             variant_level=1,
1743
 
                             invalidate_only=False,
1744
 
                             _interface=_interface):
1745
 
        """ Modify a variable so that it's a property which announces
1746
 
        its changes to DBus.
1747
 
 
1748
 
        transform_fun: Function that takes a value and a variant_level
1749
 
                       and transforms it to a D-Bus type.
1750
 
        dbus_name: D-Bus name of the variable
1751
 
        type_func: Function that transform the value before sending it
1752
 
                   to the D-Bus.  Default: no transform
1753
 
        variant_level: D-Bus variant level.  Default: 1
1754
 
        """
1755
 
        attrname = "_{}".format(dbus_name)
1756
 
 
1757
 
        def setter(self, value):
1758
 
            if hasattr(self, "dbus_object_path"):
1759
 
                if (not hasattr(self, attrname) or
1760
 
                    type_func(getattr(self, attrname, None))
1761
 
                    != type_func(value)):
1762
 
                    if invalidate_only:
1763
 
                        self.PropertiesChanged(
1764
 
                            _interface, dbus.Dictionary(),
1765
 
                            dbus.Array((dbus_name, )))
1766
 
                    else:
1767
 
                        dbus_value = transform_func(
1768
 
                            type_func(value),
1769
 
                            variant_level=variant_level)
1770
 
                        self.PropertyChanged(dbus.String(dbus_name),
1771
 
                                             dbus_value)
1772
 
                        self.PropertiesChanged(
1773
 
                            _interface,
1774
 
                            dbus.Dictionary({dbus.String(dbus_name):
1775
 
                                             dbus_value}),
1776
 
                            dbus.Array())
1777
 
            setattr(self, attrname, value)
1778
 
 
1779
 
        return property(lambda self: getattr(self, attrname), setter)
1780
 
 
1781
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1782
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1783
 
                                             "ApprovalPending",
1784
 
                                             type_func=bool)
1785
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1786
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1787
 
                                        "LastEnabled")
1788
 
    checker = notifychangeproperty(
1789
 
        dbus.Boolean, "CheckerRunning",
1790
 
        type_func=lambda checker: checker is not None)
1791
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1792
 
                                           "LastCheckedOK")
1793
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1794
 
                                               "LastCheckerStatus")
1795
 
    last_approval_request = notifychangeproperty(
1796
 
        datetime_to_dbus, "LastApprovalRequest")
1797
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1798
 
                                               "ApprovedByDefault")
1799
 
    approval_delay = notifychangeproperty(
1800
 
        dbus.UInt64, "ApprovalDelay",
1801
 
        type_func=lambda td: td.total_seconds() * 1000)
1802
 
    approval_duration = notifychangeproperty(
1803
 
        dbus.UInt64, "ApprovalDuration",
1804
 
        type_func=lambda td: td.total_seconds() * 1000)
1805
 
    host = notifychangeproperty(dbus.String, "Host")
1806
 
    timeout = notifychangeproperty(
1807
 
        dbus.UInt64, "Timeout",
1808
 
        type_func=lambda td: td.total_seconds() * 1000)
1809
 
    extended_timeout = notifychangeproperty(
1810
 
        dbus.UInt64, "ExtendedTimeout",
1811
 
        type_func=lambda td: td.total_seconds() * 1000)
1812
 
    interval = notifychangeproperty(
1813
 
        dbus.UInt64, "Interval",
1814
 
        type_func=lambda td: td.total_seconds() * 1000)
1815
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1816
 
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
1817
 
                                  invalidate_only=True)
1818
 
 
1819
 
    del notifychangeproperty
1820
 
 
1821
 
    def __del__(self, *args, **kwargs):
1822
 
        try:
1823
 
            self.remove_from_connection()
1824
 
        except LookupError:
1825
 
            pass
1826
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1827
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1828
 
        Client.__del__(self, *args, **kwargs)
1829
 
 
1830
 
    def checker_callback(self, source, condition,
1831
 
                         connection, command, *args, **kwargs):
1832
 
        ret = Client.checker_callback(self, source, condition,
1833
 
                                      connection, command, *args,
1834
 
                                      **kwargs)
1835
 
        exitstatus = self.last_checker_status
1836
 
        if exitstatus >= 0:
1837
 
            # Emit D-Bus signal
1838
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1839
 
                                  # This is specific to GNU libC
1840
 
                                  dbus.Int64(exitstatus << 8),
1841
 
                                  dbus.String(command))
1842
 
        else:
1843
 
            # Emit D-Bus signal
1844
 
            self.CheckerCompleted(dbus.Int16(-1),
1845
 
                                  dbus.Int64(
1846
 
                                      # This is specific to GNU libC
1847
 
                                      (exitstatus << 8)
1848
 
                                      | self.last_checker_signal),
1849
 
                                  dbus.String(command))
1850
 
        return ret
1851
 
 
1852
 
    def start_checker(self, *args, **kwargs):
1853
 
        old_checker_pid = getattr(self.checker, "pid", None)
1854
 
        r = Client.start_checker(self, *args, **kwargs)
1855
 
        # Only if new checker process was started
1856
 
        if (self.checker is not None
1857
 
            and old_checker_pid != self.checker.pid):
1858
 
            # Emit D-Bus signal
1859
 
            self.CheckerStarted(self.current_checker_command)
1860
 
        return r
1861
 
 
1862
 
    def _reset_approved(self):
1863
 
        self.approved = None
1864
 
        return False
1865
 
 
1866
 
    def approve(self, value=True):
1867
 
        self.approved = value
1868
 
        GLib.timeout_add(int(self.approval_duration.total_seconds()
1869
 
                             * 1000), self._reset_approved)
1870
 
        self.send_changedstate()
1871
 
 
1872
 
    #  D-Bus methods, signals & properties
1873
 
 
1874
 
    #  Interfaces
1875
 
 
1876
 
    #  Signals
1877
 
 
1878
 
    # CheckerCompleted - signal
1879
 
    @dbus.service.signal(_interface, signature="nxs")
1880
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1881
 
        "D-Bus signal"
1882
 
        pass
1883
 
 
1884
 
    # CheckerStarted - signal
1885
 
    @dbus.service.signal(_interface, signature="s")
1886
 
    def CheckerStarted(self, command):
1887
 
        "D-Bus signal"
1888
 
        pass
1889
 
 
1890
 
    # PropertyChanged - signal
1891
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1892
 
    @dbus.service.signal(_interface, signature="sv")
1893
 
    def PropertyChanged(self, property, value):
1894
 
        "D-Bus signal"
1895
 
        pass
1896
 
 
1897
 
    # GotSecret - signal
1898
 
    @dbus.service.signal(_interface)
1899
 
    def GotSecret(self):
1900
 
        """D-Bus signal
1901
 
        Is sent after a successful transfer of secret from the Mandos
1902
 
        server to mandos-client
1903
 
        """
1904
 
        pass
1905
 
 
1906
 
    # Rejected - signal
1907
 
    @dbus.service.signal(_interface, signature="s")
1908
 
    def Rejected(self, reason):
1909
 
        "D-Bus signal"
1910
 
        pass
1911
 
 
1912
 
    # NeedApproval - signal
1913
 
    @dbus.service.signal(_interface, signature="tb")
1914
 
    def NeedApproval(self, timeout, default):
1915
 
        "D-Bus signal"
1916
 
        return self.need_approval()
1917
 
 
1918
 
    #  Methods
1919
 
 
1920
 
    # Approve - method
1921
 
    @dbus.service.method(_interface, in_signature="b")
1922
 
    def Approve(self, value):
1923
 
        self.approve(value)
1924
 
 
1925
 
    # CheckedOK - method
1926
 
    @dbus.service.method(_interface)
1927
 
    def CheckedOK(self):
1928
 
        self.checked_ok()
1929
 
 
1930
 
    # Enable - method
1931
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1932
 
    @dbus.service.method(_interface)
1933
 
    def Enable(self):
1934
 
        "D-Bus method"
1935
 
        self.enable()
1936
 
 
1937
 
    # StartChecker - method
1938
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1939
 
    @dbus.service.method(_interface)
1940
 
    def StartChecker(self):
1941
 
        "D-Bus method"
1942
 
        self.start_checker()
1943
 
 
1944
 
    # Disable - method
1945
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1946
 
    @dbus.service.method(_interface)
1947
 
    def Disable(self):
1948
 
        "D-Bus method"
1949
 
        self.disable()
1950
 
 
1951
 
    # StopChecker - method
1952
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1953
 
    @dbus.service.method(_interface)
1954
 
    def StopChecker(self):
1955
 
        self.stop_checker()
1956
 
 
1957
 
    #  Properties
1958
 
 
1959
 
    # ApprovalPending - property
1960
 
    @dbus_service_property(_interface, signature="b", access="read")
1961
 
    def ApprovalPending_dbus_property(self):
1962
 
        return dbus.Boolean(bool(self.approvals_pending))
1963
 
 
1964
 
    # ApprovedByDefault - property
1965
 
    @dbus_service_property(_interface,
1966
 
                           signature="b",
1967
 
                           access="readwrite")
1968
 
    def ApprovedByDefault_dbus_property(self, value=None):
1969
 
        if value is None:       # get
1970
 
            return dbus.Boolean(self.approved_by_default)
1971
 
        self.approved_by_default = bool(value)
1972
 
 
1973
 
    # ApprovalDelay - property
1974
 
    @dbus_service_property(_interface,
1975
 
                           signature="t",
1976
 
                           access="readwrite")
1977
 
    def ApprovalDelay_dbus_property(self, value=None):
1978
 
        if value is None:       # get
1979
 
            return dbus.UInt64(self.approval_delay.total_seconds()
1980
 
                               * 1000)
1981
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1982
 
 
1983
 
    # ApprovalDuration - property
1984
 
    @dbus_service_property(_interface,
1985
 
                           signature="t",
1986
 
                           access="readwrite")
1987
 
    def ApprovalDuration_dbus_property(self, value=None):
1988
 
        if value is None:       # get
1989
 
            return dbus.UInt64(self.approval_duration.total_seconds()
1990
 
                               * 1000)
1991
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1992
 
 
1993
 
    # Name - property
1994
 
    @dbus_annotations(
1995
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1996
 
    @dbus_service_property(_interface, signature="s", access="read")
1997
 
    def Name_dbus_property(self):
1998
 
        return dbus.String(self.name)
1999
 
 
2000
 
    # Fingerprint - property
2001
 
    @dbus_annotations(
2002
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2003
 
    @dbus_service_property(_interface, signature="s", access="read")
2004
 
    def Fingerprint_dbus_property(self):
2005
 
        return dbus.String(self.fingerprint)
2006
 
 
2007
 
    # Host - property
2008
 
    @dbus_service_property(_interface,
2009
 
                           signature="s",
2010
 
                           access="readwrite")
2011
 
    def Host_dbus_property(self, value=None):
2012
 
        if value is None:       # get
2013
 
            return dbus.String(self.host)
2014
 
        self.host = str(value)
2015
 
 
2016
 
    # Created - property
2017
 
    @dbus_annotations(
2018
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2019
 
    @dbus_service_property(_interface, signature="s", access="read")
2020
 
    def Created_dbus_property(self):
2021
 
        return datetime_to_dbus(self.created)
2022
 
 
2023
 
    # LastEnabled - property
2024
 
    @dbus_service_property(_interface, signature="s", access="read")
2025
 
    def LastEnabled_dbus_property(self):
2026
 
        return datetime_to_dbus(self.last_enabled)
2027
 
 
2028
 
    # Enabled - property
2029
 
    @dbus_service_property(_interface,
2030
 
                           signature="b",
2031
 
                           access="readwrite")
2032
 
    def Enabled_dbus_property(self, value=None):
2033
 
        if value is None:       # get
2034
 
            return dbus.Boolean(self.enabled)
2035
 
        if value:
2036
 
            self.enable()
2037
 
        else:
2038
 
            self.disable()
2039
 
 
2040
 
    # LastCheckedOK - property
2041
 
    @dbus_service_property(_interface,
2042
 
                           signature="s",
2043
 
                           access="readwrite")
2044
 
    def LastCheckedOK_dbus_property(self, value=None):
2045
 
        if value is not None:
2046
 
            self.checked_ok()
2047
 
            return
2048
 
        return datetime_to_dbus(self.last_checked_ok)
2049
 
 
2050
 
    # LastCheckerStatus - property
2051
 
    @dbus_service_property(_interface, signature="n", access="read")
2052
 
    def LastCheckerStatus_dbus_property(self):
2053
 
        return dbus.Int16(self.last_checker_status)
2054
 
 
2055
 
    # Expires - property
2056
 
    @dbus_service_property(_interface, signature="s", access="read")
2057
 
    def Expires_dbus_property(self):
2058
 
        return datetime_to_dbus(self.expires)
2059
 
 
2060
 
    # LastApprovalRequest - property
2061
 
    @dbus_service_property(_interface, signature="s", access="read")
2062
 
    def LastApprovalRequest_dbus_property(self):
2063
 
        return datetime_to_dbus(self.last_approval_request)
2064
 
 
2065
 
    # Timeout - property
2066
 
    @dbus_service_property(_interface,
2067
 
                           signature="t",
2068
 
                           access="readwrite")
2069
 
    def Timeout_dbus_property(self, value=None):
2070
 
        if value is None:       # get
2071
 
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
2072
 
        old_timeout = self.timeout
2073
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
2074
 
        # Reschedule disabling
2075
 
        if self.enabled:
2076
 
            now = datetime.datetime.utcnow()
2077
 
            self.expires += self.timeout - old_timeout
2078
 
            if self.expires <= now:
2079
 
                # The timeout has passed
2080
 
                self.disable()
2081
 
            else:
2082
 
                if (getattr(self, "disable_initiator_tag", None)
2083
 
                    is None):
2084
 
                    return
2085
 
                GLib.source_remove(self.disable_initiator_tag)
2086
 
                self.disable_initiator_tag = GLib.timeout_add(
2087
 
                    int((self.expires - now).total_seconds() * 1000),
2088
 
                    self.disable)
2089
 
 
2090
 
    # ExtendedTimeout - property
2091
 
    @dbus_service_property(_interface,
2092
 
                           signature="t",
2093
 
                           access="readwrite")
2094
 
    def ExtendedTimeout_dbus_property(self, value=None):
2095
 
        if value is None:       # get
2096
 
            return dbus.UInt64(self.extended_timeout.total_seconds()
2097
 
                               * 1000)
2098
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2099
 
 
2100
 
    # Interval - property
2101
 
    @dbus_service_property(_interface,
2102
 
                           signature="t",
2103
 
                           access="readwrite")
2104
 
    def Interval_dbus_property(self, value=None):
2105
 
        if value is None:       # get
2106
 
            return dbus.UInt64(self.interval.total_seconds() * 1000)
2107
 
        self.interval = datetime.timedelta(0, 0, 0, value)
2108
 
        if getattr(self, "checker_initiator_tag", None) is None:
2109
 
            return
2110
 
        if self.enabled:
2111
 
            # Reschedule checker run
2112
 
            GLib.source_remove(self.checker_initiator_tag)
2113
 
            self.checker_initiator_tag = GLib.timeout_add(
2114
 
                value, self.start_checker)
2115
 
            self.start_checker()  # Start one now, too
2116
 
 
2117
 
    # Checker - property
2118
 
    @dbus_service_property(_interface,
2119
 
                           signature="s",
2120
 
                           access="readwrite")
2121
 
    def Checker_dbus_property(self, value=None):
2122
 
        if value is None:       # get
2123
 
            return dbus.String(self.checker_command)
2124
 
        self.checker_command = str(value)
2125
 
 
2126
 
    # CheckerRunning - property
2127
 
    @dbus_service_property(_interface,
2128
 
                           signature="b",
2129
 
                           access="readwrite")
2130
 
    def CheckerRunning_dbus_property(self, value=None):
2131
 
        if value is None:       # get
2132
 
            return dbus.Boolean(self.checker is not None)
2133
 
        if value:
2134
 
            self.start_checker()
2135
 
        else:
2136
 
            self.stop_checker()
2137
 
 
2138
 
    # ObjectPath - property
2139
 
    @dbus_annotations(
2140
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2141
 
         "org.freedesktop.DBus.Deprecated": "true"})
2142
 
    @dbus_service_property(_interface, signature="o", access="read")
2143
 
    def ObjectPath_dbus_property(self):
2144
 
        return self.dbus_object_path  # is already a dbus.ObjectPath
2145
 
 
2146
 
    # Secret = property
2147
 
    @dbus_annotations(
2148
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal":
2149
 
         "invalidates"})
2150
 
    @dbus_service_property(_interface,
2151
 
                           signature="ay",
2152
 
                           access="write",
2153
 
                           byte_arrays=True)
2154
 
    def Secret_dbus_property(self, value):
2155
 
        self.secret = bytes(value)
2156
 
 
2157
 
    del _interface
2158
 
 
2159
 
 
2160
 
class ProxyClient(object):
2161
 
    def __init__(self, child_pipe, fpr, address):
2162
 
        self._pipe = child_pipe
2163
 
        self._pipe.send(('init', fpr, address))
2164
 
        if not self._pipe.recv():
2165
 
            raise KeyError(fpr)
2166
 
 
2167
 
    def __getattribute__(self, name):
2168
 
        if name == '_pipe':
2169
 
            return super(ProxyClient, self).__getattribute__(name)
2170
 
        self._pipe.send(('getattr', name))
2171
 
        data = self._pipe.recv()
2172
 
        if data[0] == 'data':
2173
 
            return data[1]
2174
 
        if data[0] == 'function':
2175
 
 
2176
 
            def func(*args, **kwargs):
2177
 
                self._pipe.send(('funcall', name, args, kwargs))
2178
 
                return self._pipe.recv()[1]
2179
 
 
2180
 
            return func
2181
 
 
2182
 
    def __setattr__(self, name, value):
2183
 
        if name == '_pipe':
2184
 
            return super(ProxyClient, self).__setattr__(name, value)
2185
 
        self._pipe.send(('setattr', name, value))
2186
 
 
2187
 
 
2188
 
class ClientHandler(socketserver.BaseRequestHandler, object):
2189
 
    """A class to handle client connections.
2190
 
 
2191
 
    Instantiated once for each connection to handle it.
 
248
    def still_valid(self, now=None):
 
249
        """Has the timeout not yet passed for this client?"""
 
250
        if now is None:
 
251
            now = datetime.datetime.now()
 
252
        if self.last_seen is None:
 
253
            return now < (self.created + self.timeout)
 
254
        else:
 
255
            return now < (self.last_seen + self.timeout)
 
256
 
 
257
 
 
258
def peer_certificate(session):
 
259
    # If not an OpenPGP certificate...
 
260
    if gnutls.library.functions.gnutls_certificate_type_get\
 
261
            (session._c_object) \
 
262
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
263
        # ...do the normal thing
 
264
        return session.peer_certificate
 
265
    list_size = ctypes.c_uint()
 
266
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
267
        (session._c_object, ctypes.byref(list_size))
 
268
    if list_size.value == 0:
 
269
        return None
 
270
    cert = cert_list[0]
 
271
    return ctypes.string_at(cert.data, cert.size)
 
272
 
 
273
 
 
274
def fingerprint(openpgp):
 
275
    # New empty GnuTLS certificate
 
276
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
277
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
278
        (ctypes.byref(crt))
 
279
    # New GnuTLS "datum" with the OpenPGP public key
 
280
    datum = gnutls.library.types.gnutls_datum_t\
 
281
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
282
                     ctypes.POINTER(ctypes.c_ubyte)),
 
283
         ctypes.c_uint(len(openpgp)))
 
284
    # Import the OpenPGP public key into the certificate
 
285
    ret = gnutls.library.functions.gnutls_openpgp_crt_import\
 
286
        (crt,
 
287
         ctypes.byref(datum),
 
288
         gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
289
    # New buffer for the fingerprint
 
290
    buffer = ctypes.create_string_buffer(20)
 
291
    buffer_length = ctypes.c_size_t()
 
292
    # Get the fingerprint from the certificate into the buffer
 
293
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
294
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
295
    # Deinit the certificate
 
296
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
297
    # Convert the buffer to a Python bytestring
 
298
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
299
    # Convert the bytestring to hexadecimal notation
 
300
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
301
    return hex_fpr
 
302
 
 
303
 
 
304
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
305
    """A TCP request handler class.
 
306
    Instantiated by IPv6_TCPServer for each request to handle it.
2192
307
    Note: This will run in its own forked process."""
2193
 
 
 
308
    
2194
309
    def handle(self):
2195
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
2196
 
            logger.info("TCP connection from: %s",
2197
 
                        str(self.client_address))
2198
 
            logger.debug("Pipe FD: %d",
2199
 
                         self.server.child_pipe.fileno())
2200
 
 
2201
 
            session = gnutls.ClientSession(self.request)
2202
 
 
2203
 
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
2204
 
            #                       "+AES-256-CBC", "+SHA1",
2205
 
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
2206
 
            #                       "+DHE-DSS"))
2207
 
            # Use a fallback default, since this MUST be set.
2208
 
            priority = self.server.gnutls_priority
2209
 
            if priority is None:
2210
 
                priority = "NORMAL"
2211
 
            gnutls.priority_set_direct(session._c_object,
2212
 
                                       priority.encode("utf-8"),
2213
 
                                       None)
2214
 
 
2215
 
            # Start communication using the Mandos protocol
2216
 
            # Get protocol number
2217
 
            line = self.request.makefile().readline()
2218
 
            logger.debug("Protocol version: %r", line)
2219
 
            try:
2220
 
                if int(line.strip().split()[0]) > 1:
2221
 
                    raise RuntimeError(line)
2222
 
            except (ValueError, IndexError, RuntimeError) as error:
2223
 
                logger.error("Unknown protocol version: %s", error)
2224
 
                return
2225
 
 
2226
 
            # Start GnuTLS connection
2227
 
            try:
2228
 
                session.handshake()
2229
 
            except gnutls.Error as error:
2230
 
                logger.warning("Handshake failed: %s", error)
2231
 
                # Do not run session.bye() here: the session is not
2232
 
                # established.  Just abandon the request.
2233
 
                return
2234
 
            logger.debug("Handshake succeeded")
2235
 
 
2236
 
            approval_required = False
2237
 
            try:
2238
 
                try:
2239
 
                    fpr = self.fingerprint(
2240
 
                        self.peer_certificate(session))
2241
 
                except (TypeError, gnutls.Error) as error:
2242
 
                    logger.warning("Bad certificate: %s", error)
2243
 
                    return
2244
 
                logger.debug("Fingerprint: %s", fpr)
2245
 
 
2246
 
                try:
2247
 
                    client = ProxyClient(child_pipe, fpr,
2248
 
                                         self.client_address)
2249
 
                except KeyError:
2250
 
                    return
2251
 
 
2252
 
                if client.approval_delay:
2253
 
                    delay = client.approval_delay
2254
 
                    client.approvals_pending += 1
2255
 
                    approval_required = True
2256
 
 
2257
 
                while True:
2258
 
                    if not client.enabled:
2259
 
                        logger.info("Client %s is disabled",
2260
 
                                    client.name)
2261
 
                        if self.server.use_dbus:
2262
 
                            # Emit D-Bus signal
2263
 
                            client.Rejected("Disabled")
2264
 
                        return
2265
 
 
2266
 
                    if client.approved or not client.approval_delay:
2267
 
                        # We are approved or approval is disabled
2268
 
                        break
2269
 
                    elif client.approved is None:
2270
 
                        logger.info("Client %s needs approval",
2271
 
                                    client.name)
2272
 
                        if self.server.use_dbus:
2273
 
                            # Emit D-Bus signal
2274
 
                            client.NeedApproval(
2275
 
                                client.approval_delay.total_seconds()
2276
 
                                * 1000, client.approved_by_default)
2277
 
                    else:
2278
 
                        logger.warning("Client %s was not approved",
2279
 
                                       client.name)
2280
 
                        if self.server.use_dbus:
2281
 
                            # Emit D-Bus signal
2282
 
                            client.Rejected("Denied")
2283
 
                        return
2284
 
 
2285
 
                    # wait until timeout or approved
2286
 
                    time = datetime.datetime.now()
2287
 
                    client.changedstate.acquire()
2288
 
                    client.changedstate.wait(delay.total_seconds())
2289
 
                    client.changedstate.release()
2290
 
                    time2 = datetime.datetime.now()
2291
 
                    if (time2 - time) >= delay:
2292
 
                        if not client.approved_by_default:
2293
 
                            logger.warning("Client %s timed out while"
2294
 
                                           " waiting for approval",
2295
 
                                           client.name)
2296
 
                            if self.server.use_dbus:
2297
 
                                # Emit D-Bus signal
2298
 
                                client.Rejected("Approval timed out")
2299
 
                            return
2300
 
                        else:
2301
 
                            break
2302
 
                    else:
2303
 
                        delay -= time2 - time
2304
 
 
2305
 
                try:
2306
 
                    session.send(client.secret)
2307
 
                except gnutls.Error as error:
2308
 
                    logger.warning("gnutls send failed",
2309
 
                                   exc_info=error)
2310
 
                    return
2311
 
 
2312
 
                logger.info("Sending secret to %s", client.name)
2313
 
                # bump the timeout using extended_timeout
2314
 
                client.bump_timeout(client.extended_timeout)
2315
 
                if self.server.use_dbus:
2316
 
                    # Emit D-Bus signal
2317
 
                    client.GotSecret()
2318
 
 
2319
 
            finally:
2320
 
                if approval_required:
2321
 
                    client.approvals_pending -= 1
2322
 
                try:
2323
 
                    session.bye()
2324
 
                except gnutls.Error as error:
2325
 
                    logger.warning("GnuTLS bye failed",
2326
 
                                   exc_info=error)
2327
 
 
2328
 
    @staticmethod
2329
 
    def peer_certificate(session):
2330
 
        "Return the peer's OpenPGP certificate as a bytestring"
2331
 
        # If not an OpenPGP certificate...
2332
 
        if (gnutls.certificate_type_get(session._c_object)
2333
 
            != gnutls.CRT_OPENPGP):
2334
 
            # ...return invalid data
2335
 
            return b""
2336
 
        list_size = ctypes.c_uint(1)
2337
 
        cert_list = (gnutls.certificate_get_peers
2338
 
                     (session._c_object, ctypes.byref(list_size)))
2339
 
        if not bool(cert_list) and list_size.value != 0:
2340
 
            raise gnutls.Error("error getting peer certificate")
2341
 
        if list_size.value == 0:
2342
 
            return None
2343
 
        cert = cert_list[0]
2344
 
        return ctypes.string_at(cert.data, cert.size)
2345
 
 
2346
 
    @staticmethod
2347
 
    def fingerprint(openpgp):
2348
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
2349
 
        # New GnuTLS "datum" with the OpenPGP public key
2350
 
        datum = gnutls.datum_t(
2351
 
            ctypes.cast(ctypes.c_char_p(openpgp),
2352
 
                        ctypes.POINTER(ctypes.c_ubyte)),
2353
 
            ctypes.c_uint(len(openpgp)))
2354
 
        # New empty GnuTLS certificate
2355
 
        crt = gnutls.openpgp_crt_t()
2356
 
        gnutls.openpgp_crt_init(ctypes.byref(crt))
2357
 
        # Import the OpenPGP public key into the certificate
2358
 
        gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
2359
 
                                  gnutls.OPENPGP_FMT_RAW)
2360
 
        # Verify the self signature in the key
2361
 
        crtverify = ctypes.c_uint()
2362
 
        gnutls.openpgp_crt_verify_self(crt, 0,
2363
 
                                       ctypes.byref(crtverify))
2364
 
        if crtverify.value != 0:
2365
 
            gnutls.openpgp_crt_deinit(crt)
2366
 
            raise gnutls.CertificateSecurityError("Verify failed")
2367
 
        # New buffer for the fingerprint
2368
 
        buf = ctypes.create_string_buffer(20)
2369
 
        buf_len = ctypes.c_size_t()
2370
 
        # Get the fingerprint from the certificate into the buffer
2371
 
        gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
2372
 
                                           ctypes.byref(buf_len))
2373
 
        # Deinit the certificate
2374
 
        gnutls.openpgp_crt_deinit(crt)
2375
 
        # Convert the buffer to a Python bytestring
2376
 
        fpr = ctypes.string_at(buf, buf_len.value)
2377
 
        # Convert the bytestring to hexadecimal notation
2378
 
        hex_fpr = binascii.hexlify(fpr).upper()
2379
 
        return hex_fpr
2380
 
 
2381
 
 
2382
 
class MultiprocessingMixIn(object):
2383
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
2384
 
 
2385
 
    def sub_process_main(self, request, address):
2386
 
        try:
2387
 
            self.finish_request(request, address)
2388
 
        except Exception:
2389
 
            self.handle_error(request, address)
2390
 
        self.close_request(request)
2391
 
 
2392
 
    def process_request(self, request, address):
2393
 
        """Start a new process to process the request."""
2394
 
        proc = multiprocessing.Process(target=self.sub_process_main,
2395
 
                                       args=(request, address))
2396
 
        proc.start()
2397
 
        return proc
2398
 
 
2399
 
 
2400
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2401
 
    """ adds a pipe to the MixIn """
2402
 
 
2403
 
    def process_request(self, request, client_address):
2404
 
        """Overrides and wraps the original process_request().
2405
 
 
2406
 
        This function creates a new pipe in self.pipe
2407
 
        """
2408
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
2409
 
 
2410
 
        proc = MultiprocessingMixIn.process_request(self, request,
2411
 
                                                    client_address)
2412
 
        self.child_pipe.close()
2413
 
        self.add_pipe(parent_pipe, proc)
2414
 
 
2415
 
    def add_pipe(self, parent_pipe, proc):
2416
 
        """Dummy function; override as necessary"""
2417
 
        raise NotImplementedError()
2418
 
 
2419
 
 
2420
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2421
 
                     socketserver.TCPServer, object):
2422
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
2423
 
 
 
310
        logger.debug(u"TCP connection from: %s",
 
311
                     unicode(self.client_address))
 
312
        session = gnutls.connection.ClientSession(self.request,
 
313
                                                  gnutls.connection.\
 
314
                                                  X509Credentials())
 
315
        
 
316
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
317
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
318
        #                "+DHE-DSS"))
 
319
        priority = "SECURE256"
 
320
        
 
321
        gnutls.library.functions.gnutls_priority_set_direct\
 
322
            (session._c_object, priority, None);
 
323
        
 
324
        try:
 
325
            session.handshake()
 
326
        except gnutls.errors.GNUTLSError, error:
 
327
            logger.debug(u"Handshake failed: %s", error)
 
328
            # Do not run session.bye() here: the session is not
 
329
            # established.  Just abandon the request.
 
330
            return
 
331
        try:
 
332
            fpr = fingerprint(peer_certificate(session))
 
333
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
334
            logger.debug(u"Bad certificate: %s", error)
 
335
            session.bye()
 
336
            return
 
337
        logger.debug(u"Fingerprint: %s", fpr)
 
338
        client = None
 
339
        for c in clients:
 
340
            if c.fingerprint == fpr:
 
341
                client = c
 
342
                break
 
343
        # Have to check if client.still_valid(), since it is possible
 
344
        # that the client timed out while establishing the GnuTLS
 
345
        # session.
 
346
        if (not client) or (not client.still_valid()):
 
347
            if client:
 
348
                logger.debug(u"Client %(name)s is invalid",
 
349
                             vars(client))
 
350
            else:
 
351
                logger.debug(u"Client not found for fingerprint: %s",
 
352
                             fpr)
 
353
            session.bye()
 
354
            return
 
355
        sent_size = 0
 
356
        while sent_size < len(client.secret):
 
357
            sent = session.send(client.secret[sent_size:])
 
358
            logger.debug(u"Sent: %d, remaining: %d",
 
359
                         sent, len(client.secret)
 
360
                         - (sent_size + sent))
 
361
            sent_size += sent
 
362
        session.bye()
 
363
 
 
364
 
 
365
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
366
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
2424
367
    Attributes:
2425
 
        enabled:        Boolean; whether this server is activated yet
2426
 
        interface:      None or a network interface name (string)
2427
 
        use_ipv6:       Boolean; to use IPv6 or not
 
368
        options:        Command line options
 
369
        clients:        Set() of Client objects
2428
370
    """
2429
 
 
2430
 
    def __init__(self, server_address, RequestHandlerClass,
2431
 
                 interface=None,
2432
 
                 use_ipv6=True,
2433
 
                 socketfd=None):
2434
 
        """If socketfd is set, use that file descriptor instead of
2435
 
        creating a new one with socket.socket().
2436
 
        """
2437
 
        self.interface = interface
2438
 
        if use_ipv6:
2439
 
            self.address_family = socket.AF_INET6
2440
 
        if socketfd is not None:
2441
 
            # Save the file descriptor
2442
 
            self.socketfd = socketfd
2443
 
            # Save the original socket.socket() function
2444
 
            self.socket_socket = socket.socket
2445
 
 
2446
 
            # To implement --socket, we monkey patch socket.socket.
2447
 
            #
2448
 
            # (When socketserver.TCPServer is a new-style class, we
2449
 
            # could make self.socket into a property instead of monkey
2450
 
            # patching socket.socket.)
2451
 
            #
2452
 
            # Create a one-time-only replacement for socket.socket()
2453
 
            @functools.wraps(socket.socket)
2454
 
            def socket_wrapper(*args, **kwargs):
2455
 
                # Restore original function so subsequent calls are
2456
 
                # not affected.
2457
 
                socket.socket = self.socket_socket
2458
 
                del self.socket_socket
2459
 
                # This time only, return a new socket object from the
2460
 
                # saved file descriptor.
2461
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
2462
 
            # Replace socket.socket() function with wrapper
2463
 
            socket.socket = socket_wrapper
2464
 
        # The socketserver.TCPServer.__init__ will call
2465
 
        # socket.socket(), which might be our replacement,
2466
 
        # socket_wrapper(), if socketfd was set.
2467
 
        socketserver.TCPServer.__init__(self, server_address,
2468
 
                                        RequestHandlerClass)
2469
 
 
 
371
    address_family = socket.AF_INET6
 
372
    def __init__(self, *args, **kwargs):
 
373
        if "options" in kwargs:
 
374
            self.options = kwargs["options"]
 
375
            del kwargs["options"]
 
376
        if "clients" in kwargs:
 
377
            self.clients = kwargs["clients"]
 
378
            del kwargs["clients"]
 
379
        return super(type(self), self).__init__(*args, **kwargs)
2470
380
    def server_bind(self):
2471
381
        """This overrides the normal server_bind() function
2472
382
        to bind to an interface if one was specified, and also NOT to
2473
383
        bind to an address or port if they were not specified."""
2474
 
        global SO_BINDTODEVICE
2475
 
        if self.interface is not None:
2476
 
            if SO_BINDTODEVICE is None:
2477
 
                # Fall back to a hard-coded value which seems to be
2478
 
                # common enough.
2479
 
                logger.warning("SO_BINDTODEVICE not found, trying 25")
2480
 
                SO_BINDTODEVICE = 25
 
384
        if self.options.interface:
 
385
            if not hasattr(socket, "SO_BINDTODEVICE"):
 
386
                # From /usr/include/asm-i486/socket.h
 
387
                socket.SO_BINDTODEVICE = 25
2481
388
            try:
2482
 
                self.socket.setsockopt(
2483
 
                    socket.SOL_SOCKET, SO_BINDTODEVICE,
2484
 
                    (self.interface + "\0").encode("utf-8"))
2485
 
            except socket.error as error:
2486
 
                if error.errno == errno.EPERM:
2487
 
                    logger.error("No permission to bind to"
2488
 
                                 " interface %s", self.interface)
2489
 
                elif error.errno == errno.ENOPROTOOPT:
2490
 
                    logger.error("SO_BINDTODEVICE not available;"
2491
 
                                 " cannot bind to interface %s",
2492
 
                                 self.interface)
2493
 
                elif error.errno == errno.ENODEV:
2494
 
                    logger.error("Interface %s does not exist,"
2495
 
                                 " cannot bind", self.interface)
 
389
                self.socket.setsockopt(socket.SOL_SOCKET,
 
390
                                       socket.SO_BINDTODEVICE,
 
391
                                       self.options.interface)
 
392
            except socket.error, error:
 
393
                if error[0] == errno.EPERM:
 
394
                    logger.warning(u"No permission to"
 
395
                                   u" bind to interface %s",
 
396
                                   self.options.interface)
2496
397
                else:
2497
 
                    raise
 
398
                    raise error
2498
399
        # Only bind(2) the socket if we really need to.
2499
400
        if self.server_address[0] or self.server_address[1]:
2500
401
            if not self.server_address[0]:
2501
 
                if self.address_family == socket.AF_INET6:
2502
 
                    any_address = "::"  # in6addr_any
2503
 
                else:
2504
 
                    any_address = "0.0.0.0"  # INADDR_ANY
2505
 
                self.server_address = (any_address,
 
402
                in6addr_any = "::"
 
403
                self.server_address = (in6addr_any,
2506
404
                                       self.server_address[1])
2507
 
            elif not self.server_address[1]:
2508
 
                self.server_address = (self.server_address[0], 0)
2509
 
#                 if self.interface:
2510
 
#                     self.server_address = (self.server_address[0],
2511
 
#                                            0, # port
2512
 
#                                            0, # flowinfo
2513
 
#                                            if_nametoindex
2514
 
#                                            (self.interface))
2515
 
            return socketserver.TCPServer.server_bind(self)
2516
 
 
2517
 
 
2518
 
class MandosServer(IPv6_TCPServer):
2519
 
    """Mandos server.
2520
 
 
2521
 
    Attributes:
2522
 
        clients:        set of Client objects
2523
 
        gnutls_priority GnuTLS priority string
2524
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2525
 
 
2526
 
    Assumes a GLib.MainLoop event loop.
2527
 
    """
2528
 
 
2529
 
    def __init__(self, server_address, RequestHandlerClass,
2530
 
                 interface=None,
2531
 
                 use_ipv6=True,
2532
 
                 clients=None,
2533
 
                 gnutls_priority=None,
2534
 
                 use_dbus=True,
2535
 
                 socketfd=None):
2536
 
        self.enabled = False
2537
 
        self.clients = clients
2538
 
        if self.clients is None:
2539
 
            self.clients = {}
2540
 
        self.use_dbus = use_dbus
2541
 
        self.gnutls_priority = gnutls_priority
2542
 
        IPv6_TCPServer.__init__(self, server_address,
2543
 
                                RequestHandlerClass,
2544
 
                                interface=interface,
2545
 
                                use_ipv6=use_ipv6,
2546
 
                                socketfd=socketfd)
2547
 
 
2548
 
    def server_activate(self):
2549
 
        if self.enabled:
2550
 
            return socketserver.TCPServer.server_activate(self)
2551
 
 
2552
 
    def enable(self):
2553
 
        self.enabled = True
2554
 
 
2555
 
    def add_pipe(self, parent_pipe, proc):
2556
 
        # Call "handle_ipc" for both data and EOF events
2557
 
        GLib.io_add_watch(
2558
 
            parent_pipe.fileno(),
2559
 
            GLib.IO_IN | GLib.IO_HUP,
2560
 
            functools.partial(self.handle_ipc,
2561
 
                              parent_pipe=parent_pipe,
2562
 
                              proc=proc))
2563
 
 
2564
 
    def handle_ipc(self, source, condition,
2565
 
                   parent_pipe=None,
2566
 
                   proc=None,
2567
 
                   client_object=None):
2568
 
        # error, or the other end of multiprocessing.Pipe has closed
2569
 
        if condition & (GLib.IO_ERR | GLib.IO_HUP):
2570
 
            # Wait for other process to exit
2571
 
            proc.join()
2572
 
            return False
2573
 
 
2574
 
        # Read a request from the child
2575
 
        request = parent_pipe.recv()
2576
 
        command = request[0]
2577
 
 
2578
 
        if command == 'init':
2579
 
            fpr = request[1]
2580
 
            address = request[2]
2581
 
 
2582
 
            for c in self.clients.values():
2583
 
                if c.fingerprint == fpr:
2584
 
                    client = c
2585
 
                    break
2586
 
            else:
2587
 
                logger.info("Client not found for fingerprint: %s, ad"
2588
 
                            "dress: %s", fpr, address)
2589
 
                if self.use_dbus:
2590
 
                    # Emit D-Bus signal
2591
 
                    mandos_dbus_service.ClientNotFound(fpr,
2592
 
                                                       address[0])
2593
 
                parent_pipe.send(False)
2594
 
                return False
2595
 
 
2596
 
            GLib.io_add_watch(
2597
 
                parent_pipe.fileno(),
2598
 
                GLib.IO_IN | GLib.IO_HUP,
2599
 
                functools.partial(self.handle_ipc,
2600
 
                                  parent_pipe=parent_pipe,
2601
 
                                  proc=proc,
2602
 
                                  client_object=client))
2603
 
            parent_pipe.send(True)
2604
 
            # remove the old hook in favor of the new above hook on
2605
 
            # same fileno
2606
 
            return False
2607
 
        if command == 'funcall':
2608
 
            funcname = request[1]
2609
 
            args = request[2]
2610
 
            kwargs = request[3]
2611
 
 
2612
 
            parent_pipe.send(('data', getattr(client_object,
2613
 
                                              funcname)(*args,
2614
 
                                                        **kwargs)))
2615
 
 
2616
 
        if command == 'getattr':
2617
 
            attrname = request[1]
2618
 
            if isinstance(client_object.__getattribute__(attrname),
2619
 
                          collections.Callable):
2620
 
                parent_pipe.send(('function', ))
2621
 
            else:
2622
 
                parent_pipe.send((
2623
 
                    'data', client_object.__getattribute__(attrname)))
2624
 
 
2625
 
        if command == 'setattr':
2626
 
            attrname = request[1]
2627
 
            value = request[2]
2628
 
            setattr(client_object, attrname, value)
2629
 
 
2630
 
        return True
2631
 
 
2632
 
 
2633
 
def rfc3339_duration_to_delta(duration):
2634
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2635
 
 
2636
 
    >>> rfc3339_duration_to_delta("P7D")
2637
 
    datetime.timedelta(7)
2638
 
    >>> rfc3339_duration_to_delta("PT60S")
2639
 
    datetime.timedelta(0, 60)
2640
 
    >>> rfc3339_duration_to_delta("PT60M")
2641
 
    datetime.timedelta(0, 3600)
2642
 
    >>> rfc3339_duration_to_delta("PT24H")
2643
 
    datetime.timedelta(1)
2644
 
    >>> rfc3339_duration_to_delta("P1W")
2645
 
    datetime.timedelta(7)
2646
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2647
 
    datetime.timedelta(0, 330)
2648
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2649
 
    datetime.timedelta(1, 200)
2650
 
    """
2651
 
 
2652
 
    # Parsing an RFC 3339 duration with regular expressions is not
2653
 
    # possible - there would have to be multiple places for the same
2654
 
    # values, like seconds.  The current code, while more esoteric, is
2655
 
    # cleaner without depending on a parsing library.  If Python had a
2656
 
    # built-in library for parsing we would use it, but we'd like to
2657
 
    # avoid excessive use of external libraries.
2658
 
 
2659
 
    # New type for defining tokens, syntax, and semantics all-in-one
2660
 
    Token = collections.namedtuple("Token", (
2661
 
        "regexp",  # To match token; if "value" is not None, must have
2662
 
                   # a "group" containing digits
2663
 
        "value",   # datetime.timedelta or None
2664
 
        "followers"))           # Tokens valid after this token
2665
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2666
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2667
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2668
 
    token_second = Token(re.compile(r"(\d+)S"),
2669
 
                         datetime.timedelta(seconds=1),
2670
 
                         frozenset((token_end, )))
2671
 
    token_minute = Token(re.compile(r"(\d+)M"),
2672
 
                         datetime.timedelta(minutes=1),
2673
 
                         frozenset((token_second, token_end)))
2674
 
    token_hour = Token(re.compile(r"(\d+)H"),
2675
 
                       datetime.timedelta(hours=1),
2676
 
                       frozenset((token_minute, token_end)))
2677
 
    token_time = Token(re.compile(r"T"),
2678
 
                       None,
2679
 
                       frozenset((token_hour, token_minute,
2680
 
                                  token_second)))
2681
 
    token_day = Token(re.compile(r"(\d+)D"),
2682
 
                      datetime.timedelta(days=1),
2683
 
                      frozenset((token_time, token_end)))
2684
 
    token_month = Token(re.compile(r"(\d+)M"),
2685
 
                        datetime.timedelta(weeks=4),
2686
 
                        frozenset((token_day, token_end)))
2687
 
    token_year = Token(re.compile(r"(\d+)Y"),
2688
 
                       datetime.timedelta(weeks=52),
2689
 
                       frozenset((token_month, token_end)))
2690
 
    token_week = Token(re.compile(r"(\d+)W"),
2691
 
                       datetime.timedelta(weeks=1),
2692
 
                       frozenset((token_end, )))
2693
 
    token_duration = Token(re.compile(r"P"), None,
2694
 
                           frozenset((token_year, token_month,
2695
 
                                      token_day, token_time,
2696
 
                                      token_week)))
2697
 
    # Define starting values:
2698
 
    # Value so far
2699
 
    value = datetime.timedelta()
2700
 
    found_token = None
2701
 
    # Following valid tokens
2702
 
    followers = frozenset((token_duration, ))
2703
 
    # String left to parse
2704
 
    s = duration
2705
 
    # Loop until end token is found
2706
 
    while found_token is not token_end:
2707
 
        # Search for any currently valid tokens
2708
 
        for token in followers:
2709
 
            match = token.regexp.match(s)
2710
 
            if match is not None:
2711
 
                # Token found
2712
 
                if token.value is not None:
2713
 
                    # Value found, parse digits
2714
 
                    factor = int(match.group(1), 10)
2715
 
                    # Add to value so far
2716
 
                    value += factor * token.value
2717
 
                # Strip token from string
2718
 
                s = token.regexp.sub("", s, 1)
2719
 
                # Go to found token
2720
 
                found_token = token
2721
 
                # Set valid next tokens
2722
 
                followers = found_token.followers
2723
 
                break
2724
 
        else:
2725
 
            # No currently valid tokens were found
2726
 
            raise ValueError("Invalid RFC 3339 duration: {!r}"
2727
 
                             .format(duration))
2728
 
    # End token found
2729
 
    return value
 
405
            elif self.server_address[1] is None:
 
406
                self.server_address = (self.server_address[0],
 
407
                                       0)
 
408
            return super(type(self), self).server_bind()
2730
409
 
2731
410
 
2732
411
def string_to_delta(interval):
2740
419
    datetime.timedelta(0, 3600)
2741
420
    >>> string_to_delta('24h')
2742
421
    datetime.timedelta(1)
2743
 
    >>> string_to_delta('1w')
 
422
    >>> string_to_delta(u'1w')
2744
423
    datetime.timedelta(7)
2745
 
    >>> string_to_delta('5m 30s')
2746
 
    datetime.timedelta(0, 330)
2747
424
    """
2748
 
 
2749
 
    try:
2750
 
        return rfc3339_duration_to_delta(interval)
2751
 
    except ValueError:
2752
 
        pass
2753
 
 
2754
 
    timevalue = datetime.timedelta(0)
2755
 
    for s in interval.split():
2756
 
        try:
2757
 
            suffix = s[-1]
2758
 
            value = int(s[:-1])
2759
 
            if suffix == "d":
2760
 
                delta = datetime.timedelta(value)
2761
 
            elif suffix == "s":
2762
 
                delta = datetime.timedelta(0, value)
2763
 
            elif suffix == "m":
2764
 
                delta = datetime.timedelta(0, 0, 0, 0, value)
2765
 
            elif suffix == "h":
2766
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2767
 
            elif suffix == "w":
2768
 
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2769
 
            else:
2770
 
                raise ValueError("Unknown suffix {!r}".format(suffix))
2771
 
        except IndexError as e:
2772
 
            raise ValueError(*(e.args))
2773
 
        timevalue += delta
2774
 
    return timevalue
2775
 
 
2776
 
 
2777
 
def daemon(nochdir=False, noclose=False):
2778
 
    """See daemon(3).  Standard BSD Unix function.
2779
 
 
2780
 
    This should really exist as os.daemon, but it doesn't (yet)."""
2781
 
    if os.fork():
2782
 
        sys.exit()
2783
 
    os.setsid()
2784
 
    if not nochdir:
2785
 
        os.chdir("/")
2786
 
    if os.fork():
2787
 
        sys.exit()
2788
 
    if not noclose:
2789
 
        # Close all standard open file descriptors
2790
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2791
 
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2792
 
            raise OSError(errno.ENODEV,
2793
 
                          "{} not a character device"
2794
 
                          .format(os.devnull))
2795
 
        os.dup2(null, sys.stdin.fileno())
2796
 
        os.dup2(null, sys.stdout.fileno())
2797
 
        os.dup2(null, sys.stderr.fileno())
2798
 
        if null > 2:
2799
 
            os.close(null)
2800
 
 
2801
 
 
2802
 
def main():
2803
 
 
2804
 
    ##################################################################
2805
 
    # Parsing of options, both command line and config file
2806
 
 
2807
 
    parser = argparse.ArgumentParser()
2808
 
    parser.add_argument("-v", "--version", action="version",
2809
 
                        version="%(prog)s {}".format(version),
2810
 
                        help="show version number and exit")
2811
 
    parser.add_argument("-i", "--interface", metavar="IF",
2812
 
                        help="Bind to interface IF")
2813
 
    parser.add_argument("-a", "--address",
2814
 
                        help="Address to listen for requests on")
2815
 
    parser.add_argument("-p", "--port", type=int,
2816
 
                        help="Port number to receive requests on")
2817
 
    parser.add_argument("--check", action="store_true",
2818
 
                        help="Run self-test")
2819
 
    parser.add_argument("--debug", action="store_true",
2820
 
                        help="Debug mode; run in foreground and log"
2821
 
                        " to terminal", default=None)
2822
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2823
 
                        help="Debug level for stdout output")
2824
 
    parser.add_argument("--priority", help="GnuTLS"
2825
 
                        " priority string (see GnuTLS documentation)")
2826
 
    parser.add_argument("--servicename",
2827
 
                        metavar="NAME", help="Zeroconf service name")
2828
 
    parser.add_argument("--configdir",
2829
 
                        default="/etc/mandos", metavar="DIR",
2830
 
                        help="Directory to search for configuration"
2831
 
                        " files")
2832
 
    parser.add_argument("--no-dbus", action="store_false",
2833
 
                        dest="use_dbus", help="Do not provide D-Bus"
2834
 
                        " system bus interface", default=None)
2835
 
    parser.add_argument("--no-ipv6", action="store_false",
2836
 
                        dest="use_ipv6", help="Do not use IPv6",
2837
 
                        default=None)
2838
 
    parser.add_argument("--no-restore", action="store_false",
2839
 
                        dest="restore", help="Do not restore stored"
2840
 
                        " state", default=None)
2841
 
    parser.add_argument("--socket", type=int,
2842
 
                        help="Specify a file descriptor to a network"
2843
 
                        " socket to use instead of creating one")
2844
 
    parser.add_argument("--statedir", metavar="DIR",
2845
 
                        help="Directory to save/restore state in")
2846
 
    parser.add_argument("--foreground", action="store_true",
2847
 
                        help="Run in foreground", default=None)
2848
 
    parser.add_argument("--no-zeroconf", action="store_false",
2849
 
                        dest="zeroconf", help="Do not use Zeroconf",
2850
 
                        default=None)
2851
 
 
2852
 
    options = parser.parse_args()
2853
 
 
 
425
    try:
 
426
        suffix=unicode(interval[-1])
 
427
        value=int(interval[:-1])
 
428
        if suffix == u"d":
 
429
            delta = datetime.timedelta(value)
 
430
        elif suffix == u"s":
 
431
            delta = datetime.timedelta(0, value)
 
432
        elif suffix == u"m":
 
433
            delta = datetime.timedelta(0, 0, 0, 0, value)
 
434
        elif suffix == u"h":
 
435
            delta = datetime.timedelta(0, 0, 0, 0, 0, value)
 
436
        elif suffix == u"w":
 
437
            delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
 
438
        else:
 
439
            raise ValueError
 
440
    except (ValueError, IndexError):
 
441
        raise ValueError
 
442
    return delta
 
443
 
 
444
 
 
445
def add_service():
 
446
    """From the Avahi server example code"""
 
447
    global group, serviceName, serviceType, servicePort, serviceTXT, \
 
448
           domain, host
 
449
    if group is None:
 
450
        group = dbus.Interface(
 
451
                bus.get_object( avahi.DBUS_NAME,
 
452
                                server.EntryGroupNew()),
 
453
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
454
        group.connect_to_signal('StateChanged',
 
455
                                entry_group_state_changed)
 
456
    logger.debug(u"Adding service '%s' of type '%s' ...",
 
457
                 serviceName, serviceType)
 
458
    
 
459
    group.AddService(
 
460
            serviceInterface,           # interface
 
461
            avahi.PROTO_INET6,          # protocol
 
462
            dbus.UInt32(0),             # flags
 
463
            serviceName, serviceType,
 
464
            domain, host,
 
465
            dbus.UInt16(servicePort),
 
466
            avahi.string_array_to_txt_array(serviceTXT))
 
467
    group.Commit()
 
468
 
 
469
 
 
470
def remove_service():
 
471
    """From the Avahi server example code"""
 
472
    global group
 
473
    
 
474
    if not group is None:
 
475
        group.Reset()
 
476
 
 
477
 
 
478
def server_state_changed(state):
 
479
    """From the Avahi server example code"""
 
480
    if state == avahi.SERVER_COLLISION:
 
481
        logger.warning(u"Server name collision")
 
482
        remove_service()
 
483
    elif state == avahi.SERVER_RUNNING:
 
484
        add_service()
 
485
 
 
486
 
 
487
def entry_group_state_changed(state, error):
 
488
    """From the Avahi server example code"""
 
489
    global serviceName, server, rename_count
 
490
    
 
491
    logger.debug(u"state change: %i", state)
 
492
    
 
493
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
494
        logger.debug(u"Service established.")
 
495
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
496
        
 
497
        rename_count = rename_count - 1
 
498
        if rename_count > 0:
 
499
            name = server.GetAlternativeServiceName(name)
 
500
            logger.warning(u"Service name collision, "
 
501
                           u"changing name to '%s' ...", name)
 
502
            remove_service()
 
503
            add_service()
 
504
            
 
505
        else:
 
506
            logger.error(u"No suitable service name found "
 
507
                         u"after %i retries, exiting.",
 
508
                         n_rename)
 
509
            main_loop.quit()
 
510
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
511
        logger.error(u"Error in group state changed %s",
 
512
                     unicode(error))
 
513
        main_loop.quit()
 
514
        return
 
515
 
 
516
 
 
517
def if_nametoindex(interface):
 
518
    """Call the C function if_nametoindex()"""
 
519
    try:
 
520
        libc = ctypes.cdll.LoadLibrary("libc.so.6")
 
521
        return libc.if_nametoindex(interface)
 
522
    except (OSError, AttributeError):
 
523
        if "struct" not in sys.modules:
 
524
            import struct
 
525
        if "fcntl" not in sys.modules:
 
526
            import fcntl
 
527
        SIOCGIFINDEX = 0x8933      # From /usr/include/linux/sockios.h
 
528
        s = socket.socket()
 
529
        ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
530
                            struct.pack("16s16x", interface))
 
531
        s.close()
 
532
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
533
        return interface_index
 
534
 
 
535
 
 
536
if __name__ == '__main__':
 
537
    parser = OptionParser()
 
538
    parser.add_option("-i", "--interface", type="string",
 
539
                      default=None, metavar="IF",
 
540
                      help="Bind to interface IF")
 
541
    parser.add_option("--cert", type="string", default="cert.pem",
 
542
                      metavar="FILE",
 
543
                      help="Public key certificate PEM file to use")
 
544
    parser.add_option("--key", type="string", default="key.pem",
 
545
                      metavar="FILE",
 
546
                      help="Private key PEM file to use")
 
547
    parser.add_option("--ca", type="string", default="ca.pem",
 
548
                      metavar="FILE",
 
549
                      help="Certificate Authority certificate PEM file to use")
 
550
    parser.add_option("--crl", type="string", default="crl.pem",
 
551
                      metavar="FILE",
 
552
                      help="Certificate Revokation List PEM file to use")
 
553
    parser.add_option("-p", "--port", type="int", default=None,
 
554
                      help="Port number to receive requests on")
 
555
    parser.add_option("--timeout", type="string", # Parsed later
 
556
                      default="1h",
 
557
                      help="Amount of downtime allowed for clients")
 
558
    parser.add_option("--interval", type="string", # Parsed later
 
559
                      default="5m",
 
560
                      help="How often to check that a client is up")
 
561
    parser.add_option("--check", action="store_true", default=False,
 
562
                      help="Run self-test")
 
563
    parser.add_option("--debug", action="store_true", default=False,
 
564
                      help="Debug mode")
 
565
    (options, args) = parser.parse_args()
 
566
    
2854
567
    if options.check:
2855
568
        import doctest
2856
 
        fail_count, test_count = doctest.testmod()
2857
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2858
 
 
2859
 
    # Default values for config file for server-global settings
2860
 
    server_defaults = {"interface": "",
2861
 
                       "address": "",
2862
 
                       "port": "",
2863
 
                       "debug": "False",
2864
 
                       "priority":
2865
 
                       "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2866
 
                       ":+SIGN-DSA-SHA256",
2867
 
                       "servicename": "Mandos",
2868
 
                       "use_dbus": "True",
2869
 
                       "use_ipv6": "True",
2870
 
                       "debuglevel": "",
2871
 
                       "restore": "True",
2872
 
                       "socket": "",
2873
 
                       "statedir": "/var/lib/mandos",
2874
 
                       "foreground": "False",
2875
 
                       "zeroconf": "True",
2876
 
                       }
2877
 
 
2878
 
    # Parse config file for server-global settings
2879
 
    server_config = configparser.SafeConfigParser(server_defaults)
2880
 
    del server_defaults
2881
 
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2882
 
    # Convert the SafeConfigParser object to a dict
2883
 
    server_settings = server_config.defaults()
2884
 
    # Use the appropriate methods on the non-string config options
2885
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2886
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2887
 
                                                           option)
2888
 
    if server_settings["port"]:
2889
 
        server_settings["port"] = server_config.getint("DEFAULT",
2890
 
                                                       "port")
2891
 
    if server_settings["socket"]:
2892
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2893
 
                                                         "socket")
2894
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2895
 
        # over with an opened os.devnull.  But we don't want this to
2896
 
        # happen with a supplied network socket.
2897
 
        if 0 <= server_settings["socket"] <= 2:
2898
 
            server_settings["socket"] = os.dup(server_settings
2899
 
                                               ["socket"])
2900
 
    del server_config
2901
 
 
2902
 
    # Override the settings from the config file with command line
2903
 
    # options, if set.
2904
 
    for option in ("interface", "address", "port", "debug",
2905
 
                   "priority", "servicename", "configdir", "use_dbus",
2906
 
                   "use_ipv6", "debuglevel", "restore", "statedir",
2907
 
                   "socket", "foreground", "zeroconf"):
2908
 
        value = getattr(options, option)
2909
 
        if value is not None:
2910
 
            server_settings[option] = value
2911
 
    del options
2912
 
    # Force all strings to be unicode
2913
 
    for option in server_settings.keys():
2914
 
        if isinstance(server_settings[option], bytes):
2915
 
            server_settings[option] = (server_settings[option]
2916
 
                                       .decode("utf-8"))
2917
 
    # Force all boolean options to be boolean
2918
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2919
 
                   "foreground", "zeroconf"):
2920
 
        server_settings[option] = bool(server_settings[option])
2921
 
    # Debug implies foreground
2922
 
    if server_settings["debug"]:
2923
 
        server_settings["foreground"] = True
2924
 
    # Now we have our good server settings in "server_settings"
2925
 
 
2926
 
    ##################################################################
2927
 
 
2928
 
    if (not server_settings["zeroconf"]
2929
 
        and not (server_settings["port"]
2930
 
                 or server_settings["socket"] != "")):
2931
 
        parser.error("Needs port or socket to work without Zeroconf")
2932
 
 
2933
 
    # For convenience
2934
 
    debug = server_settings["debug"]
2935
 
    debuglevel = server_settings["debuglevel"]
2936
 
    use_dbus = server_settings["use_dbus"]
2937
 
    use_ipv6 = server_settings["use_ipv6"]
2938
 
    stored_state_path = os.path.join(server_settings["statedir"],
2939
 
                                     stored_state_file)
2940
 
    foreground = server_settings["foreground"]
2941
 
    zeroconf = server_settings["zeroconf"]
2942
 
 
2943
 
    if debug:
2944
 
        initlogger(debug, logging.DEBUG)
2945
 
    else:
2946
 
        if not debuglevel:
2947
 
            initlogger(debug)
2948
 
        else:
2949
 
            level = getattr(logging, debuglevel.upper())
2950
 
            initlogger(debug, level)
2951
 
 
2952
 
    if server_settings["servicename"] != "Mandos":
2953
 
        syslogger.setFormatter(
2954
 
            logging.Formatter('Mandos ({}) [%(process)d]:'
2955
 
                              ' %(levelname)s: %(message)s'.format(
2956
 
                                  server_settings["servicename"])))
2957
 
 
2958
 
    # Parse config file with clients
2959
 
    client_config = configparser.SafeConfigParser(Client
2960
 
                                                  .client_defaults)
2961
 
    client_config.read(os.path.join(server_settings["configdir"],
2962
 
                                    "clients.conf"))
2963
 
 
2964
 
    global mandos_dbus_service
2965
 
    mandos_dbus_service = None
2966
 
 
2967
 
    socketfd = None
2968
 
    if server_settings["socket"] != "":
2969
 
        socketfd = server_settings["socket"]
2970
 
    tcp_server = MandosServer(
2971
 
        (server_settings["address"], server_settings["port"]),
2972
 
        ClientHandler,
2973
 
        interface=(server_settings["interface"] or None),
2974
 
        use_ipv6=use_ipv6,
2975
 
        gnutls_priority=server_settings["priority"],
2976
 
        use_dbus=use_dbus,
2977
 
        socketfd=socketfd)
2978
 
    if not foreground:
2979
 
        pidfilename = "/run/mandos.pid"
2980
 
        if not os.path.isdir("/run/."):
2981
 
            pidfilename = "/var/run/mandos.pid"
2982
 
        pidfile = None
2983
 
        try:
2984
 
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
2985
 
        except IOError as e:
2986
 
            logger.error("Could not open file %r", pidfilename,
2987
 
                         exc_info=e)
2988
 
 
2989
 
    for name, group in (("_mandos", "_mandos"),
2990
 
                        ("mandos", "mandos"),
2991
 
                        ("nobody", "nogroup")):
2992
 
        try:
2993
 
            uid = pwd.getpwnam(name).pw_uid
2994
 
            gid = pwd.getpwnam(group).pw_gid
2995
 
            break
2996
 
        except KeyError:
2997
 
            continue
2998
 
    else:
2999
 
        uid = 65534
3000
 
        gid = 65534
3001
 
    try:
3002
 
        os.setgid(gid)
3003
 
        os.setuid(uid)
3004
 
        if debug:
3005
 
            logger.debug("Did setuid/setgid to {}:{}".format(uid,
3006
 
                                                             gid))
3007
 
    except OSError as error:
3008
 
        logger.warning("Failed to setuid/setgid to {}:{}: {}"
3009
 
                       .format(uid, gid, os.strerror(error.errno)))
3010
 
        if error.errno != errno.EPERM:
3011
 
            raise
3012
 
 
3013
 
    if debug:
3014
 
        # Enable all possible GnuTLS debugging
3015
 
 
3016
 
        # "Use a log level over 10 to enable all debugging options."
3017
 
        # - GnuTLS manual
3018
 
        gnutls.global_set_log_level(11)
3019
 
 
3020
 
        @gnutls.log_func
3021
 
        def debug_gnutls(level, string):
3022
 
            logger.debug("GnuTLS: %s", string[:-1])
3023
 
 
3024
 
        gnutls.global_set_log_function(debug_gnutls)
3025
 
 
3026
 
        # Redirect stdin so all checkers get /dev/null
3027
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3028
 
        os.dup2(null, sys.stdin.fileno())
3029
 
        if null > 2:
3030
 
            os.close(null)
3031
 
 
3032
 
    # Need to fork before connecting to D-Bus
3033
 
    if not foreground:
3034
 
        # Close all input and output, do double fork, etc.
3035
 
        daemon()
3036
 
 
3037
 
    # multiprocessing will use threads, so before we use GLib we need
3038
 
    # to inform GLib that threads will be used.
3039
 
    GLib.threads_init()
3040
 
 
3041
 
    global main_loop
3042
 
    # From the Avahi example code
3043
 
    DBusGMainLoop(set_as_default=True)
3044
 
    main_loop = GLib.MainLoop()
 
569
        doctest.testmod()
 
570
        sys.exit()
 
571
    
 
572
    # Parse the time arguments
 
573
    try:
 
574
        options.timeout = string_to_delta(options.timeout)
 
575
    except ValueError:
 
576
        parser.error("option --timeout: Unparseable time")
 
577
    try:
 
578
        options.interval = string_to_delta(options.interval)
 
579
    except ValueError:
 
580
        parser.error("option --interval: Unparseable time")
 
581
    
 
582
    # Parse config file
 
583
    defaults = { "checker": "sleep 1; fping -q -- %%(fqdn)s" }
 
584
    client_config = ConfigParser.SafeConfigParser(defaults)
 
585
    #client_config.readfp(open("secrets.conf"), "secrets.conf")
 
586
    client_config.read("mandos-clients.conf")
 
587
    
 
588
    # From the Avahi server example code
 
589
    DBusGMainLoop(set_as_default=True )
 
590
    main_loop = gobject.MainLoop()
3045
591
    bus = dbus.SystemBus()
3046
 
    # End of Avahi example code
3047
 
    if use_dbus:
3048
 
        try:
3049
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
3050
 
                                            bus,
3051
 
                                            do_not_queue=True)
3052
 
            old_bus_name = dbus.service.BusName(
3053
 
                "se.bsnet.fukt.Mandos", bus,
3054
 
                do_not_queue=True)
3055
 
        except dbus.exceptions.DBusException as e:
3056
 
            logger.error("Disabling D-Bus:", exc_info=e)
3057
 
            use_dbus = False
3058
 
            server_settings["use_dbus"] = False
3059
 
            tcp_server.use_dbus = False
3060
 
    if zeroconf:
3061
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3062
 
        service = AvahiServiceToSyslog(
3063
 
            name=server_settings["servicename"],
3064
 
            servicetype="_mandos._tcp",
3065
 
            protocol=protocol,
3066
 
            bus=bus)
3067
 
        if server_settings["interface"]:
3068
 
            service.interface = if_nametoindex(
3069
 
                server_settings["interface"].encode("utf-8"))
3070
 
 
3071
 
    global multiprocessing_manager
3072
 
    multiprocessing_manager = multiprocessing.Manager()
3073
 
 
3074
 
    client_class = Client
3075
 
    if use_dbus:
3076
 
        client_class = functools.partial(ClientDBus, bus=bus)
3077
 
 
3078
 
    client_settings = Client.config_parser(client_config)
3079
 
    old_client_settings = {}
3080
 
    clients_data = {}
3081
 
 
3082
 
    # This is used to redirect stdout and stderr for checker processes
3083
 
    global wnull
3084
 
    wnull = open(os.devnull, "w")  # A writable /dev/null
3085
 
    # Only used if server is running in foreground but not in debug
3086
 
    # mode
3087
 
    if debug or not foreground:
3088
 
        wnull.close()
3089
 
 
3090
 
    # Get client data and settings from last running state.
3091
 
    if server_settings["restore"]:
3092
 
        try:
3093
 
            with open(stored_state_path, "rb") as stored_state:
3094
 
                if sys.version_info.major == 2:
3095
 
                    clients_data, old_client_settings = pickle.load(
3096
 
                        stored_state)
3097
 
                else:
3098
 
                    bytes_clients_data, bytes_old_client_settings = (
3099
 
                        pickle.load(stored_state, encoding="bytes"))
3100
 
                    #   Fix bytes to strings
3101
 
                    #  clients_data
3102
 
                    # .keys()
3103
 
                    clients_data = {(key.decode("utf-8")
3104
 
                                     if isinstance(key, bytes)
3105
 
                                     else key): value
3106
 
                                    for key, value in
3107
 
                                    bytes_clients_data.items()}
3108
 
                    del bytes_clients_data
3109
 
                    for key in clients_data:
3110
 
                        value = {(k.decode("utf-8")
3111
 
                                  if isinstance(k, bytes) else k): v
3112
 
                                 for k, v in
3113
 
                                 clients_data[key].items()}
3114
 
                        clients_data[key] = value
3115
 
                        # .client_structure
3116
 
                        value["client_structure"] = [
3117
 
                            (s.decode("utf-8")
3118
 
                             if isinstance(s, bytes)
3119
 
                             else s) for s in
3120
 
                            value["client_structure"]]
3121
 
                        # .name & .host
3122
 
                        for k in ("name", "host"):
3123
 
                            if isinstance(value[k], bytes):
3124
 
                                value[k] = value[k].decode("utf-8")
3125
 
                    #  old_client_settings
3126
 
                    # .keys()
3127
 
                    old_client_settings = {
3128
 
                        (key.decode("utf-8")
3129
 
                         if isinstance(key, bytes)
3130
 
                         else key): value
3131
 
                        for key, value in
3132
 
                        bytes_old_client_settings.items()}
3133
 
                    del bytes_old_client_settings
3134
 
                    # .host
3135
 
                    for value in old_client_settings.values():
3136
 
                        if isinstance(value["host"], bytes):
3137
 
                            value["host"] = (value["host"]
3138
 
                                             .decode("utf-8"))
3139
 
            os.remove(stored_state_path)
3140
 
        except IOError as e:
3141
 
            if e.errno == errno.ENOENT:
3142
 
                logger.warning("Could not load persistent state:"
3143
 
                               " {}".format(os.strerror(e.errno)))
3144
 
            else:
3145
 
                logger.critical("Could not load persistent state:",
3146
 
                                exc_info=e)
3147
 
                raise
3148
 
        except EOFError as e:
3149
 
            logger.warning("Could not load persistent state: "
3150
 
                           "EOFError:",
3151
 
                           exc_info=e)
3152
 
 
3153
 
    with PGPEngine() as pgp:
3154
 
        for client_name, client in clients_data.items():
3155
 
            # Skip removed clients
3156
 
            if client_name not in client_settings:
3157
 
                continue
3158
 
 
3159
 
            # Decide which value to use after restoring saved state.
3160
 
            # We have three different values: Old config file,
3161
 
            # new config file, and saved state.
3162
 
            # New config value takes precedence if it differs from old
3163
 
            # config value, otherwise use saved state.
3164
 
            for name, value in client_settings[client_name].items():
3165
 
                try:
3166
 
                    # For each value in new config, check if it
3167
 
                    # differs from the old config value (Except for
3168
 
                    # the "secret" attribute)
3169
 
                    if (name != "secret"
3170
 
                        and (value !=
3171
 
                             old_client_settings[client_name][name])):
3172
 
                        client[name] = value
3173
 
                except KeyError:
3174
 
                    pass
3175
 
 
3176
 
            # Clients who has passed its expire date can still be
3177
 
            # enabled if its last checker was successful.  A Client
3178
 
            # whose checker succeeded before we stored its state is
3179
 
            # assumed to have successfully run all checkers during
3180
 
            # downtime.
3181
 
            if client["enabled"]:
3182
 
                if datetime.datetime.utcnow() >= client["expires"]:
3183
 
                    if not client["last_checked_ok"]:
3184
 
                        logger.warning(
3185
 
                            "disabling client {} - Client never "
3186
 
                            "performed a successful checker".format(
3187
 
                                client_name))
3188
 
                        client["enabled"] = False
3189
 
                    elif client["last_checker_status"] != 0:
3190
 
                        logger.warning(
3191
 
                            "disabling client {} - Client last"
3192
 
                            " checker failed with error code"
3193
 
                            " {}".format(
3194
 
                                client_name,
3195
 
                                client["last_checker_status"]))
3196
 
                        client["enabled"] = False
3197
 
                    else:
3198
 
                        client["expires"] = (
3199
 
                            datetime.datetime.utcnow()
3200
 
                            + client["timeout"])
3201
 
                        logger.debug("Last checker succeeded,"
3202
 
                                     " keeping {} enabled".format(
3203
 
                                         client_name))
3204
 
            try:
3205
 
                client["secret"] = pgp.decrypt(
3206
 
                    client["encrypted_secret"],
3207
 
                    client_settings[client_name]["secret"])
3208
 
            except PGPError:
3209
 
                # If decryption fails, we use secret from new settings
3210
 
                logger.debug("Failed to decrypt {} old secret".format(
3211
 
                    client_name))
3212
 
                client["secret"] = (client_settings[client_name]
3213
 
                                    ["secret"])
3214
 
 
3215
 
    # Add/remove clients based on new changes made to config
3216
 
    for client_name in (set(old_client_settings)
3217
 
                        - set(client_settings)):
3218
 
        del clients_data[client_name]
3219
 
    for client_name in (set(client_settings)
3220
 
                        - set(old_client_settings)):
3221
 
        clients_data[client_name] = client_settings[client_name]
3222
 
 
3223
 
    # Create all client objects
3224
 
    for client_name, client in clients_data.items():
3225
 
        tcp_server.clients[client_name] = client_class(
3226
 
            name=client_name,
3227
 
            settings=client,
3228
 
            server_settings=server_settings)
3229
 
 
3230
 
    if not tcp_server.clients:
3231
 
        logger.warning("No clients defined")
3232
 
 
3233
 
    if not foreground:
3234
 
        if pidfile is not None:
3235
 
            pid = os.getpid()
3236
 
            try:
3237
 
                with pidfile:
3238
 
                    print(pid, file=pidfile)
3239
 
            except IOError:
3240
 
                logger.error("Could not write to file %r with PID %d",
3241
 
                             pidfilename, pid)
3242
 
        del pidfile
3243
 
        del pidfilename
3244
 
 
3245
 
    for termsig in (signal.SIGHUP, signal.SIGTERM):
3246
 
        GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3247
 
                             lambda: main_loop.quit() and False)
3248
 
 
3249
 
    if use_dbus:
3250
 
 
3251
 
        @alternate_dbus_interfaces(
3252
 
            {"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
3253
 
        class MandosDBusService(DBusObjectWithObjectManager):
3254
 
            """A D-Bus proxy object"""
3255
 
 
3256
 
            def __init__(self):
3257
 
                dbus.service.Object.__init__(self, bus, "/")
3258
 
 
3259
 
            _interface = "se.recompile.Mandos"
3260
 
 
3261
 
            @dbus.service.signal(_interface, signature="o")
3262
 
            def ClientAdded(self, objpath):
3263
 
                "D-Bus signal"
3264
 
                pass
3265
 
 
3266
 
            @dbus.service.signal(_interface, signature="ss")
3267
 
            def ClientNotFound(self, fingerprint, address):
3268
 
                "D-Bus signal"
3269
 
                pass
3270
 
 
3271
 
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
3272
 
                               "true"})
3273
 
            @dbus.service.signal(_interface, signature="os")
3274
 
            def ClientRemoved(self, objpath, name):
3275
 
                "D-Bus signal"
3276
 
                pass
3277
 
 
3278
 
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
3279
 
                               "true"})
3280
 
            @dbus.service.method(_interface, out_signature="ao")
3281
 
            def GetAllClients(self):
3282
 
                "D-Bus method"
3283
 
                return dbus.Array(c.dbus_object_path for c in
3284
 
                                  tcp_server.clients.values())
3285
 
 
3286
 
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
3287
 
                               "true"})
3288
 
            @dbus.service.method(_interface,
3289
 
                                 out_signature="a{oa{sv}}")
3290
 
            def GetAllClientsWithProperties(self):
3291
 
                "D-Bus method"
3292
 
                return dbus.Dictionary(
3293
 
                    {c.dbus_object_path: c.GetAll(
3294
 
                        "se.recompile.Mandos.Client")
3295
 
                     for c in tcp_server.clients.values()},
3296
 
                    signature="oa{sv}")
3297
 
 
3298
 
            @dbus.service.method(_interface, in_signature="o")
3299
 
            def RemoveClient(self, object_path):
3300
 
                "D-Bus method"
3301
 
                for c in tcp_server.clients.values():
3302
 
                    if c.dbus_object_path == object_path:
3303
 
                        del tcp_server.clients[c.name]
3304
 
                        c.remove_from_connection()
3305
 
                        # Don't signal the disabling
3306
 
                        c.disable(quiet=True)
3307
 
                        # Emit D-Bus signal for removal
3308
 
                        self.client_removed_signal(c)
3309
 
                        return
3310
 
                raise KeyError(object_path)
3311
 
 
3312
 
            del _interface
3313
 
 
3314
 
            @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3315
 
                                 out_signature="a{oa{sa{sv}}}")
3316
 
            def GetManagedObjects(self):
3317
 
                """D-Bus method"""
3318
 
                return dbus.Dictionary(
3319
 
                    {client.dbus_object_path:
3320
 
                     dbus.Dictionary(
3321
 
                         {interface: client.GetAll(interface)
3322
 
                          for interface in
3323
 
                          client._get_all_interface_names()})
3324
 
                     for client in tcp_server.clients.values()})
3325
 
 
3326
 
            def client_added_signal(self, client):
3327
 
                """Send the new standard signal and the old signal"""
3328
 
                if use_dbus:
3329
 
                    # New standard signal
3330
 
                    self.InterfacesAdded(
3331
 
                        client.dbus_object_path,
3332
 
                        dbus.Dictionary(
3333
 
                            {interface: client.GetAll(interface)
3334
 
                             for interface in
3335
 
                             client._get_all_interface_names()}))
3336
 
                    # Old signal
3337
 
                    self.ClientAdded(client.dbus_object_path)
3338
 
 
3339
 
            def client_removed_signal(self, client):
3340
 
                """Send the new standard signal and the old signal"""
3341
 
                if use_dbus:
3342
 
                    # New standard signal
3343
 
                    self.InterfacesRemoved(
3344
 
                        client.dbus_object_path,
3345
 
                        client._get_all_interface_names())
3346
 
                    # Old signal
3347
 
                    self.ClientRemoved(client.dbus_object_path,
3348
 
                                       client.name)
3349
 
 
3350
 
        mandos_dbus_service = MandosDBusService()
3351
 
 
3352
 
    # Save modules to variables to exempt the modules from being
3353
 
    # unloaded before the function registered with atexit() is run.
3354
 
    mp = multiprocessing
3355
 
    wn = wnull
3356
 
 
3357
 
    def cleanup():
3358
 
        "Cleanup function; run on exit"
3359
 
        if zeroconf:
3360
 
            service.cleanup()
3361
 
 
3362
 
        mp.active_children()
3363
 
        wn.close()
3364
 
        if not (tcp_server.clients or client_settings):
3365
 
            return
3366
 
 
3367
 
        # Store client before exiting. Secrets are encrypted with key
3368
 
        # based on what config file has. If config file is
3369
 
        # removed/edited, old secret will thus be unrecovable.
3370
 
        clients = {}
3371
 
        with PGPEngine() as pgp:
3372
 
            for client in tcp_server.clients.values():
3373
 
                key = client_settings[client.name]["secret"]
3374
 
                client.encrypted_secret = pgp.encrypt(client.secret,
3375
 
                                                      key)
3376
 
                client_dict = {}
3377
 
 
3378
 
                # A list of attributes that can not be pickled
3379
 
                # + secret.
3380
 
                exclude = {"bus", "changedstate", "secret",
3381
 
                           "checker", "server_settings"}
3382
 
                for name, typ in inspect.getmembers(dbus.service
3383
 
                                                    .Object):
3384
 
                    exclude.add(name)
3385
 
 
3386
 
                client_dict["encrypted_secret"] = (client
3387
 
                                                   .encrypted_secret)
3388
 
                for attr in client.client_structure:
3389
 
                    if attr not in exclude:
3390
 
                        client_dict[attr] = getattr(client, attr)
3391
 
 
3392
 
                clients[client.name] = client_dict
3393
 
                del client_settings[client.name]["secret"]
3394
 
 
3395
 
        try:
3396
 
            with tempfile.NamedTemporaryFile(
3397
 
                    mode='wb',
3398
 
                    suffix=".pickle",
3399
 
                    prefix='clients-',
3400
 
                    dir=os.path.dirname(stored_state_path),
3401
 
                    delete=False) as stored_state:
3402
 
                pickle.dump((clients, client_settings), stored_state,
3403
 
                            protocol=2)
3404
 
                tempname = stored_state.name
3405
 
            os.rename(tempname, stored_state_path)
3406
 
        except (IOError, OSError) as e:
3407
 
            if not debug:
3408
 
                try:
3409
 
                    os.remove(tempname)
3410
 
                except NameError:
3411
 
                    pass
3412
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
3413
 
                logger.warning("Could not save persistent state: {}"
3414
 
                               .format(os.strerror(e.errno)))
3415
 
            else:
3416
 
                logger.warning("Could not save persistent state:",
3417
 
                               exc_info=e)
3418
 
                raise
3419
 
 
3420
 
        # Delete all clients, and settings from config
3421
 
        while tcp_server.clients:
3422
 
            name, client = tcp_server.clients.popitem()
3423
 
            if use_dbus:
3424
 
                client.remove_from_connection()
3425
 
            # Don't signal the disabling
3426
 
            client.disable(quiet=True)
3427
 
            # Emit D-Bus signal for removal
3428
 
            if use_dbus:
3429
 
                mandos_dbus_service.client_removed_signal(client)
3430
 
        client_settings.clear()
3431
 
 
3432
 
    atexit.register(cleanup)
3433
 
 
3434
 
    for client in tcp_server.clients.values():
3435
 
        if use_dbus:
3436
 
            # Emit D-Bus signal for adding
3437
 
            mandos_dbus_service.client_added_signal(client)
3438
 
        # Need to initiate checking of clients
3439
 
        if client.enabled:
3440
 
            client.init_checker()
3441
 
 
3442
 
    tcp_server.enable()
3443
 
    tcp_server.server_activate()
3444
 
 
3445
 
    # Find out what port we got
3446
 
    if zeroconf:
3447
 
        service.port = tcp_server.socket.getsockname()[1]
3448
 
    if use_ipv6:
3449
 
        logger.info("Now listening on address %r, port %d,"
3450
 
                    " flowinfo %d, scope_id %d",
3451
 
                    *tcp_server.socket.getsockname())
3452
 
    else:                       # IPv4
3453
 
        logger.info("Now listening on address %r, port %d",
3454
 
                    *tcp_server.socket.getsockname())
3455
 
 
3456
 
    # service.interface = tcp_server.socket.getsockname()[3]
3457
 
 
 
592
    server = dbus.Interface(
 
593
            bus.get_object( avahi.DBUS_NAME, avahi.DBUS_PATH_SERVER ),
 
594
            avahi.DBUS_INTERFACE_SERVER )
 
595
    # End of Avahi example code
 
596
    
 
597
    debug = options.debug
 
598
    
 
599
    clients = Set()
 
600
    def remove_from_clients(client):
 
601
        clients.remove(client)
 
602
        if not clients:
 
603
            logger.debug(u"No clients left, exiting")
 
604
            main_loop.quit()
 
605
    
 
606
    clients.update(Set(Client(name=section, options=options,
 
607
                              stop_hook = remove_from_clients,
 
608
                              **(dict(client_config\
 
609
                                      .items(section))))
 
610
                       for section in client_config.sections()))
 
611
    for client in clients:
 
612
        client.start()
 
613
    
 
614
    tcp_server = IPv6_TCPServer((None, options.port),
 
615
                                tcp_handler,
 
616
                                options=options,
 
617
                                clients=clients)
 
618
    # Find out what random port we got
 
619
    servicePort = tcp_server.socket.getsockname()[1]
 
620
    logger.debug(u"Now listening on port %d", servicePort)
 
621
    
 
622
    if options.interface is not None:
 
623
        serviceInterface = if_nametoindex(options.interface)
 
624
    
 
625
    # From the Avahi server example code
 
626
    server.connect_to_signal("StateChanged", server_state_changed)
 
627
    server_state_changed(server.GetState())
 
628
    # End of Avahi example code
 
629
    
 
630
    gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
 
631
                         lambda *args, **kwargs:
 
632
                         tcp_server.handle_request(*args[2:],
 
633
                                                   **kwargs) or True)
3458
634
    try:
3459
 
        if zeroconf:
3460
 
            # From the Avahi example code
3461
 
            try:
3462
 
                service.activate()
3463
 
            except dbus.exceptions.DBusException as error:
3464
 
                logger.critical("D-Bus Exception", exc_info=error)
3465
 
                cleanup()
3466
 
                sys.exit(1)
3467
 
            # End of Avahi example code
3468
 
 
3469
 
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3470
 
                          lambda *args, **kwargs:
3471
 
                          (tcp_server.handle_request
3472
 
                           (*args[2:], **kwargs) or True))
3473
 
 
3474
 
        logger.debug("Starting main loop")
3475
635
        main_loop.run()
3476
 
    except AvahiError as error:
3477
 
        logger.critical("Avahi Error", exc_info=error)
3478
 
        cleanup()
3479
 
        sys.exit(1)
3480
636
    except KeyboardInterrupt:
3481
 
        if debug:
3482
 
            print("", file=sys.stderr)
3483
 
        logger.debug("Server received KeyboardInterrupt")
3484
 
    logger.debug("Server exiting")
3485
 
    # Must run before the D-Bus bus name gets deregistered
3486
 
    cleanup()
3487
 
 
3488
 
 
3489
 
if __name__ == '__main__':
3490
 
    main()
 
637
        print
 
638
    
 
639
    # Cleanup here
 
640
 
 
641
    # From the Avahi server example code
 
642
    if not group is None:
 
643
        group.Free()
 
644
    # End of Avahi example code
 
645
    
 
646
    for client in clients:
 
647
        client.stop_hook = None
 
648
        client.stop()