/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2008-09-30 07:23:39 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080930072339-jn15gyrtfpdk2dhx
* .bzrignore: Added "man" directory (created by "make install-html").

* Makefile: Add "common.ent" dependency to all manual pages.
  (htmldir, version, SED): New variables.
  (CFLAGS): Add -D option to define VERSION to $(version).
  (MANPOST, HTMLPOST): Use $(SED).
  (PROGS): Use $(CPROGS)
  (CPROGS): New; C-only programs.
  (objects): Use $(CPROGS).
  (common.ent, mandos, mandos-keygen): New targets; update version
                                       number to $(version).
  (clean): Use $(CPROGS).
  (check): Depend on "all".
  (install-html): Install to $(htmldir).

* common.ent: New file with "version" entity.

* mandos-clients.conf.xml: Use "common.ent".
* mandos-keygen.xml: - '' -
* mandos.conf.xml: - '' -
* mandos.xml: - '' -
* plugin-runner.xml: - '' -
* plugins.d/mandos-client.xml: - '' -
* plugins.d/password-prompt.xml: - '' -

* plugin-runner.c (argp_program_version): Use VERSION.
* plugins.d/mandos-client.c (argp_program_version): - '' -
* plugins.d/password-prompt.c (argp_program_version): - '' -

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1
 
#!/usr/bin/python2.7
 
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
3
4
4
# Mandos server - give out binary blobs to connecting clients.
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008-2014 Teddy Hogeborn
15
 
# Copyright © 2008-2014 Björn Påhlsson
 
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
28
27
# along with this program.  If not, see
29
28
# <http://www.gnu.org/licenses/>.
30
29
31
 
# Contact the authors at <mandos@recompile.se>.
 
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
33
32
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
from future_builtins import *
38
 
 
39
 
import SocketServer as socketserver
 
33
from __future__ import division
 
34
 
 
35
import SocketServer
40
36
import socket
41
 
import argparse
 
37
from optparse import OptionParser
42
38
import datetime
43
39
import errno
44
40
import gnutls.crypto
47
43
import gnutls.library.functions
48
44
import gnutls.library.constants
49
45
import gnutls.library.types
50
 
import ConfigParser as configparser
 
46
import ConfigParser
51
47
import sys
52
48
import re
53
49
import os
54
50
import signal
 
51
from sets import Set
55
52
import subprocess
56
53
import atexit
57
54
import stat
58
55
import logging
59
56
import logging.handlers
60
57
import pwd
61
 
import contextlib
62
 
import struct
63
 
import fcntl
64
 
import functools
65
 
import cPickle as pickle
66
 
import multiprocessing
67
 
import types
68
 
import binascii
69
 
import tempfile
70
 
import itertools
71
 
import collections
72
58
 
73
59
import dbus
74
 
import dbus.service
75
60
import gobject
76
61
import avahi
77
62
from dbus.mainloop.glib import DBusGMainLoop
78
63
import ctypes
79
64
import ctypes.util
80
 
import xml.dom.minidom
81
 
import inspect
82
 
 
83
 
try:
84
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
85
 
except AttributeError:
86
 
    try:
87
 
        from IN import SO_BINDTODEVICE
88
 
    except ImportError:
89
 
        SO_BINDTODEVICE = None
90
 
 
91
 
if sys.version_info.major == 2:
92
 
    str = unicode
93
 
 
94
 
version = "1.6.9"
95
 
stored_state_file = "clients.pickle"
96
 
 
97
 
logger = logging.getLogger()
98
 
syslogger = None
99
 
 
100
 
try:
101
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
102
 
                      (ctypes.util.find_library("c"))
103
 
                      .if_nametoindex)
104
 
except (OSError, AttributeError):
105
 
    def if_nametoindex(interface):
106
 
        "Get an interface index the hard way, i.e. using fcntl()"
107
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
108
 
        with contextlib.closing(socket.socket()) as s:
109
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
110
 
                                struct.pack(b"16s16x", interface))
111
 
        interface_index = struct.unpack("I", ifreq[16:20])[0]
112
 
        return interface_index
113
 
 
114
 
 
115
 
def initlogger(debug, level=logging.WARNING):
116
 
    """init logger and add loglevel"""
117
 
    
118
 
    global syslogger
119
 
    syslogger = (logging.handlers.SysLogHandler
120
 
                 (facility =
121
 
                  logging.handlers.SysLogHandler.LOG_DAEMON,
122
 
                  address = "/dev/log"))
123
 
    syslogger.setFormatter(logging.Formatter
124
 
                           ('Mandos [%(process)d]: %(levelname)s:'
125
 
                            ' %(message)s'))
126
 
    logger.addHandler(syslogger)
127
 
    
128
 
    if debug:
129
 
        console = logging.StreamHandler()
130
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
131
 
                                               ' [%(process)d]:'
132
 
                                               ' %(levelname)s:'
133
 
                                               ' %(message)s'))
134
 
        logger.addHandler(console)
135
 
    logger.setLevel(level)
136
 
 
137
 
 
138
 
class PGPError(Exception):
139
 
    """Exception if encryption/decryption fails"""
140
 
    pass
141
 
 
142
 
 
143
 
class PGPEngine(object):
144
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
145
 
    def __init__(self):
146
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
147
 
        self.gnupgargs = ['--batch',
148
 
                          '--home', self.tempdir,
149
 
                          '--force-mdc',
150
 
                          '--quiet',
151
 
                          '--no-use-agent']
152
 
    
153
 
    def __enter__(self):
154
 
        return self
155
 
    
156
 
    def __exit__(self, exc_type, exc_value, traceback):
157
 
        self._cleanup()
158
 
        return False
159
 
    
160
 
    def __del__(self):
161
 
        self._cleanup()
162
 
    
163
 
    def _cleanup(self):
164
 
        if self.tempdir is not None:
165
 
            # Delete contents of tempdir
166
 
            for root, dirs, files in os.walk(self.tempdir,
167
 
                                             topdown = False):
168
 
                for filename in files:
169
 
                    os.remove(os.path.join(root, filename))
170
 
                for dirname in dirs:
171
 
                    os.rmdir(os.path.join(root, dirname))
172
 
            # Remove tempdir
173
 
            os.rmdir(self.tempdir)
174
 
            self.tempdir = None
175
 
    
176
 
    def password_encode(self, password):
177
 
        # Passphrase can not be empty and can not contain newlines or
178
 
        # NUL bytes.  So we prefix it and hex encode it.
179
 
        encoded = b"mandos" + binascii.hexlify(password)
180
 
        if len(encoded) > 2048:
181
 
            # GnuPG can't handle long passwords, so encode differently
182
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
183
 
                       .replace(b"\n", b"\\n")
184
 
                       .replace(b"\0", b"\\x00"))
185
 
        return encoded
186
 
    
187
 
    def encrypt(self, data, password):
188
 
        passphrase = self.password_encode(password)
189
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
190
 
                                         ) as passfile:
191
 
            passfile.write(passphrase)
192
 
            passfile.flush()
193
 
            proc = subprocess.Popen(['gpg', '--symmetric',
194
 
                                     '--passphrase-file',
195
 
                                     passfile.name]
196
 
                                    + self.gnupgargs,
197
 
                                    stdin = subprocess.PIPE,
198
 
                                    stdout = subprocess.PIPE,
199
 
                                    stderr = subprocess.PIPE)
200
 
            ciphertext, err = proc.communicate(input = data)
201
 
        if proc.returncode != 0:
202
 
            raise PGPError(err)
203
 
        return ciphertext
204
 
    
205
 
    def decrypt(self, data, password):
206
 
        passphrase = self.password_encode(password)
207
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
208
 
                                         ) as passfile:
209
 
            passfile.write(passphrase)
210
 
            passfile.flush()
211
 
            proc = subprocess.Popen(['gpg', '--decrypt',
212
 
                                     '--passphrase-file',
213
 
                                     passfile.name]
214
 
                                    + self.gnupgargs,
215
 
                                    stdin = subprocess.PIPE,
216
 
                                    stdout = subprocess.PIPE,
217
 
                                    stderr = subprocess.PIPE)
218
 
            decrypted_plaintext, err = proc.communicate(input
219
 
                                                        = data)
220
 
        if proc.returncode != 0:
221
 
            raise PGPError(err)
222
 
        return decrypted_plaintext
223
 
 
 
65
 
 
66
version = "1.0"
 
67
 
 
68
logger = logging.Logger('mandos')
 
69
syslogger = logging.handlers.SysLogHandler\
 
70
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
71
             address = "/dev/log")
 
72
syslogger.setFormatter(logging.Formatter\
 
73
                        ('Mandos: %(levelname)s: %(message)s'))
 
74
logger.addHandler(syslogger)
 
75
 
 
76
console = logging.StreamHandler()
 
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
78
                                       ' %(message)s'))
 
79
logger.addHandler(console)
224
80
 
225
81
class AvahiError(Exception):
226
 
    def __init__(self, value, *args, **kwargs):
 
82
    def __init__(self, value):
227
83
        self.value = value
228
 
        return super(AvahiError, self).__init__(value, *args,
229
 
                                                **kwargs)
 
84
        super(AvahiError, self).__init__()
 
85
    def __str__(self):
 
86
        return repr(self.value)
230
87
 
231
88
class AvahiServiceError(AvahiError):
232
89
    pass
237
94
 
238
95
class AvahiService(object):
239
96
    """An Avahi (Zeroconf) service.
240
 
    
241
97
    Attributes:
242
98
    interface: integer; avahi.IF_UNSPEC or an interface index.
243
99
               Used to optionally bind to the specified interface.
244
100
    name: string; Example: 'Mandos'
245
101
    type: string; Example: '_mandos._tcp'.
246
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
 
102
                  See <http://www.dns-sd.org/ServiceTypes.html>
247
103
    port: integer; what port to announce
248
104
    TXT: list of strings; TXT record for the service
249
105
    domain: string; Domain to publish on, default to .local if empty.
251
107
    max_renames: integer; maximum number of renames
252
108
    rename_count: integer; counter so we only rename after collisions
253
109
                  a sensible number of times
254
 
    group: D-Bus Entry Group
255
 
    server: D-Bus Server
256
 
    bus: dbus.SystemBus()
257
110
    """
258
 
    
259
111
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
260
 
                 servicetype = None, port = None, TXT = None,
261
 
                 domain = "", host = "", max_renames = 32768,
262
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
112
                 servicetype = None, port = None, TXT = None, domain = "",
 
113
                 host = "", max_renames = 32768):
263
114
        self.interface = interface
264
115
        self.name = name
265
116
        self.type = servicetype
266
117
        self.port = port
267
 
        self.TXT = TXT if TXT is not None else []
 
118
        if TXT is None:
 
119
            self.TXT = []
 
120
        else:
 
121
            self.TXT = TXT
268
122
        self.domain = domain
269
123
        self.host = host
270
124
        self.rename_count = 0
271
125
        self.max_renames = max_renames
272
 
        self.protocol = protocol
273
 
        self.group = None       # our entry group
274
 
        self.server = None
275
 
        self.bus = bus
276
 
        self.entry_group_state_changed_match = None
277
 
    
278
 
    def rename(self, remove=True):
 
126
    def rename(self):
279
127
        """Derived from the Avahi example code"""
280
128
        if self.rename_count >= self.max_renames:
281
 
            logger.critical("No suitable Zeroconf service name found"
282
 
                            " after %i retries, exiting.",
 
129
            logger.critical(u"No suitable Zeroconf service name found"
 
130
                            u" after %i retries, exiting.",
283
131
                            self.rename_count)
284
132
            raise AvahiServiceError("Too many renames")
285
 
        self.name = str(self.server
286
 
                        .GetAlternativeServiceName(self.name))
 
133
        self.name = server.GetAlternativeServiceName(self.name)
 
134
        logger.info(u"Changing Zeroconf service name to %r ...",
 
135
                    str(self.name))
 
136
        syslogger.setFormatter(logging.Formatter\
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                               ' %%(message)s' % self.name))
 
139
        self.remove()
 
140
        self.add()
287
141
        self.rename_count += 1
288
 
        logger.info("Changing Zeroconf service name to %r ...",
289
 
                    self.name)
290
 
        if remove:
291
 
            self.remove()
292
 
        try:
293
 
            self.add()
294
 
        except dbus.exceptions.DBusException as error:
295
 
            if (error.get_dbus_name()
296
 
                == "org.freedesktop.Avahi.CollisionError"):
297
 
                logger.info("Local Zeroconf service name collision.")
298
 
                return self.rename(remove=False)
299
 
            else:
300
 
                logger.critical("D-Bus Exception", exc_info=error)
301
 
                self.cleanup()
302
 
                os._exit(1)
303
 
    
304
142
    def remove(self):
305
143
        """Derived from the Avahi example code"""
306
 
        if self.entry_group_state_changed_match is not None:
307
 
            self.entry_group_state_changed_match.remove()
308
 
            self.entry_group_state_changed_match = None
309
 
        if self.group is not None:
310
 
            self.group.Reset()
311
 
    
 
144
        if group is not None:
 
145
            group.Reset()
312
146
    def add(self):
313
147
        """Derived from the Avahi example code"""
314
 
        self.remove()
315
 
        if self.group is None:
316
 
            self.group = dbus.Interface(
317
 
                self.bus.get_object(avahi.DBUS_NAME,
318
 
                                    self.server.EntryGroupNew()),
319
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
320
 
        self.entry_group_state_changed_match = (
321
 
            self.group.connect_to_signal(
322
 
                'StateChanged', self.entry_group_state_changed))
323
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
324
 
                     self.name, self.type)
325
 
        self.group.AddService(
326
 
            self.interface,
327
 
            self.protocol,
328
 
            dbus.UInt32(0),     # flags
329
 
            self.name, self.type,
330
 
            self.domain, self.host,
331
 
            dbus.UInt16(self.port),
332
 
            avahi.string_array_to_txt_array(self.TXT))
333
 
        self.group.Commit()
334
 
    
335
 
    def entry_group_state_changed(self, state, error):
336
 
        """Derived from the Avahi example code"""
337
 
        logger.debug("Avahi entry group state change: %i", state)
338
 
        
339
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
340
 
            logger.debug("Zeroconf service established.")
341
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
342
 
            logger.info("Zeroconf service name collision.")
343
 
            self.rename()
344
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
345
 
            logger.critical("Avahi: Error in group state changed %s",
346
 
                            str(error))
347
 
            raise AvahiGroupError("State changed: {!s}"
348
 
                                  .format(error))
349
 
    
350
 
    def cleanup(self):
351
 
        """Derived from the Avahi example code"""
352
 
        if self.group is not None:
353
 
            try:
354
 
                self.group.Free()
355
 
            except (dbus.exceptions.UnknownMethodException,
356
 
                    dbus.exceptions.DBusException):
357
 
                pass
358
 
            self.group = None
359
 
        self.remove()
360
 
    
361
 
    def server_state_changed(self, state, error=None):
362
 
        """Derived from the Avahi example code"""
363
 
        logger.debug("Avahi server state change: %i", state)
364
 
        bad_states = { avahi.SERVER_INVALID:
365
 
                           "Zeroconf server invalid",
366
 
                       avahi.SERVER_REGISTERING: None,
367
 
                       avahi.SERVER_COLLISION:
368
 
                           "Zeroconf server name collision",
369
 
                       avahi.SERVER_FAILURE:
370
 
                           "Zeroconf server failure" }
371
 
        if state in bad_states:
372
 
            if bad_states[state] is not None:
373
 
                if error is None:
374
 
                    logger.error(bad_states[state])
375
 
                else:
376
 
                    logger.error(bad_states[state] + ": %r", error)
377
 
            self.cleanup()
378
 
        elif state == avahi.SERVER_RUNNING:
379
 
            self.add()
380
 
        else:
381
 
            if error is None:
382
 
                logger.debug("Unknown state: %r", state)
383
 
            else:
384
 
                logger.debug("Unknown state: %r: %r", state, error)
385
 
    
386
 
    def activate(self):
387
 
        """Derived from the Avahi example code"""
388
 
        if self.server is None:
389
 
            self.server = dbus.Interface(
390
 
                self.bus.get_object(avahi.DBUS_NAME,
391
 
                                    avahi.DBUS_PATH_SERVER,
392
 
                                    follow_name_owner_changes=True),
393
 
                avahi.DBUS_INTERFACE_SERVER)
394
 
        self.server.connect_to_signal("StateChanged",
395
 
                                 self.server_state_changed)
396
 
        self.server_state_changed(self.server.GetState())
397
 
 
398
 
 
399
 
class AvahiServiceToSyslog(AvahiService):
400
 
    def rename(self, *args, **kwargs):
401
 
        """Add the new name to the syslog messages"""
402
 
        ret = AvahiService.rename(self, *args, **kwargs)
403
 
        syslogger.setFormatter(logging.Formatter
404
 
                               ('Mandos ({}) [%(process)d]:'
405
 
                                ' %(levelname)s: %(message)s'
406
 
                                .format(self.name)))
407
 
        return ret
 
148
        global group
 
149
        if group is None:
 
150
            group = dbus.Interface\
 
151
                    (bus.get_object(avahi.DBUS_NAME,
 
152
                                    server.EntryGroupNew()),
 
153
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
            group.connect_to_signal('StateChanged',
 
155
                                    entry_group_state_changed)
 
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
157
                     service.name, service.type)
 
158
        group.AddService(
 
159
                self.interface,         # interface
 
160
                avahi.PROTO_INET6,      # protocol
 
161
                dbus.UInt32(0),         # flags
 
162
                self.name, self.type,
 
163
                self.domain, self.host,
 
164
                dbus.UInt16(self.port),
 
165
                avahi.string_array_to_txt_array(self.TXT))
 
166
        group.Commit()
 
167
 
 
168
# From the Avahi example code:
 
169
group = None                            # our entry group
 
170
# End of Avahi example code
408
171
 
409
172
 
410
173
class Client(object):
411
174
    """A representation of a client host served by this server.
412
 
    
413
175
    Attributes:
414
 
    approved:   bool(); 'None' if not yet approved/disapproved
415
 
    approval_delay: datetime.timedelta(); Time to wait for approval
416
 
    approval_duration: datetime.timedelta(); Duration of one approval
417
 
    checker:    subprocess.Popen(); a running checker process used
418
 
                                    to see if the client lives.
419
 
                                    'None' if no process is running.
420
 
    checker_callback_tag: a gobject event source tag, or None
421
 
    checker_command: string; External command which is run to check
422
 
                     if client lives.  %() expansions are done at
 
176
    name:      string; from the config file, used in log messages
 
177
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
178
                 uniquely identify the client
 
179
    secret:    bytestring; sent verbatim (over TLS) to client
 
180
    host:      string; available for use by the checker command
 
181
    created:   datetime.datetime(); object creation, not client host
 
182
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
183
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
184
                                     until this client is invalid
 
185
    interval:  datetime.timedelta(); How often to start a new checker
 
186
    stop_hook: If set, called by stop() as stop_hook(self)
 
187
    checker:   subprocess.Popen(); a running checker process used
 
188
                                   to see if the client lives.
 
189
                                   'None' if no process is running.
 
190
    checker_initiator_tag: a gobject event source tag, or None
 
191
    stop_initiator_tag:    - '' -
 
192
    checker_callback_tag:  - '' -
 
193
    checker_command: string; External command which is run to check if
 
194
                     client lives.  %() expansions are done at
423
195
                     runtime with vars(self) as dict, so that for
424
196
                     instance %(name)s can be used in the command.
425
 
    checker_initiator_tag: a gobject event source tag, or None
426
 
    created:    datetime.datetime(); (UTC) object creation
427
 
    client_structure: Object describing what attributes a client has
428
 
                      and is used for storing the client at exit
429
 
    current_checker_command: string; current running checker_command
430
 
    disable_initiator_tag: a gobject event source tag, or None
431
 
    enabled:    bool()
432
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
433
 
                 uniquely identify the client
434
 
    host:       string; available for use by the checker command
435
 
    interval:   datetime.timedelta(); How often to start a new checker
436
 
    last_approval_request: datetime.datetime(); (UTC) or None
437
 
    last_checked_ok: datetime.datetime(); (UTC) or None
438
 
    last_checker_status: integer between 0 and 255 reflecting exit
439
 
                         status of last checker. -1 reflects crashed
440
 
                         checker, -2 means no checker completed yet.
441
 
    last_enabled: datetime.datetime(); (UTC) or None
442
 
    name:       string; from the config file, used in log messages and
443
 
                        D-Bus identifiers
444
 
    secret:     bytestring; sent verbatim (over TLS) to client
445
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
446
 
                                      until this client is disabled
447
 
    extended_timeout:   extra long timeout when secret has been sent
448
 
    runtime_expansions: Allowed attributes for runtime expansion.
449
 
    expires:    datetime.datetime(); time (UTC) when a client will be
450
 
                disabled, or None
451
 
    server_settings: The server_settings dict from main()
 
197
    Private attibutes:
 
198
    _timeout: Real variable for 'timeout'
 
199
    _interval: Real variable for 'interval'
 
200
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
201
    _interval_milliseconds: - '' -
452
202
    """
453
 
    
454
 
    runtime_expansions = ("approval_delay", "approval_duration",
455
 
                          "created", "enabled", "expires",
456
 
                          "fingerprint", "host", "interval",
457
 
                          "last_approval_request", "last_checked_ok",
458
 
                          "last_enabled", "name", "timeout")
459
 
    client_defaults = { "timeout": "PT5M",
460
 
                        "extended_timeout": "PT15M",
461
 
                        "interval": "PT2M",
462
 
                        "checker": "fping -q -- %%(host)s",
463
 
                        "host": "",
464
 
                        "approval_delay": "PT0S",
465
 
                        "approval_duration": "PT1S",
466
 
                        "approved_by_default": "True",
467
 
                        "enabled": "True",
468
 
                        }
469
 
    
470
 
    @staticmethod
471
 
    def config_parser(config):
472
 
        """Construct a new dict of client settings of this form:
473
 
        { client_name: {setting_name: value, ...}, ...}
474
 
        with exceptions for any special settings as defined above.
475
 
        NOTE: Must be a pure function. Must return the same result
476
 
        value given the same arguments.
477
 
        """
478
 
        settings = {}
479
 
        for client_name in config.sections():
480
 
            section = dict(config.items(client_name))
481
 
            client = settings[client_name] = {}
482
 
            
483
 
            client["host"] = section["host"]
484
 
            # Reformat values from string types to Python types
485
 
            client["approved_by_default"] = config.getboolean(
486
 
                client_name, "approved_by_default")
487
 
            client["enabled"] = config.getboolean(client_name,
488
 
                                                  "enabled")
489
 
            
490
 
            client["fingerprint"] = (section["fingerprint"].upper()
491
 
                                     .replace(" ", ""))
492
 
            if "secret" in section:
493
 
                client["secret"] = section["secret"].decode("base64")
494
 
            elif "secfile" in section:
495
 
                with open(os.path.expanduser(os.path.expandvars
496
 
                                             (section["secfile"])),
497
 
                          "rb") as secfile:
498
 
                    client["secret"] = secfile.read()
499
 
            else:
500
 
                raise TypeError("No secret or secfile for section {}"
501
 
                                .format(section))
502
 
            client["timeout"] = string_to_delta(section["timeout"])
503
 
            client["extended_timeout"] = string_to_delta(
504
 
                section["extended_timeout"])
505
 
            client["interval"] = string_to_delta(section["interval"])
506
 
            client["approval_delay"] = string_to_delta(
507
 
                section["approval_delay"])
508
 
            client["approval_duration"] = string_to_delta(
509
 
                section["approval_duration"])
510
 
            client["checker_command"] = section["checker"]
511
 
            client["last_approval_request"] = None
512
 
            client["last_checked_ok"] = None
513
 
            client["last_checker_status"] = -2
514
 
        
515
 
        return settings
516
 
    
517
 
    def __init__(self, settings, name = None, server_settings=None):
 
203
    def _set_timeout(self, timeout):
 
204
        "Setter function for 'timeout' attribute"
 
205
        self._timeout = timeout
 
206
        self._timeout_milliseconds = ((self.timeout.days
 
207
                                       * 24 * 60 * 60 * 1000)
 
208
                                      + (self.timeout.seconds * 1000)
 
209
                                      + (self.timeout.microseconds
 
210
                                         // 1000))
 
211
    timeout = property(lambda self: self._timeout,
 
212
                       _set_timeout)
 
213
    del _set_timeout
 
214
    def _set_interval(self, interval):
 
215
        "Setter function for 'interval' attribute"
 
216
        self._interval = interval
 
217
        self._interval_milliseconds = ((self.interval.days
 
218
                                        * 24 * 60 * 60 * 1000)
 
219
                                       + (self.interval.seconds
 
220
                                          * 1000)
 
221
                                       + (self.interval.microseconds
 
222
                                          // 1000))
 
223
    interval = property(lambda self: self._interval,
 
224
                        _set_interval)
 
225
    del _set_interval
 
226
    def __init__(self, name = None, stop_hook=None, config=None):
 
227
        """Note: the 'checker' key in 'config' sets the
 
228
        'checker_command' attribute and *not* the 'checker'
 
229
        attribute."""
 
230
        if config is None:
 
231
            config = {}
518
232
        self.name = name
519
 
        if server_settings is None:
520
 
            server_settings = {}
521
 
        self.server_settings = server_settings
522
 
        # adding all client settings
523
 
        for setting, value in settings.items():
524
 
            setattr(self, setting, value)
525
 
        
526
 
        if self.enabled:
527
 
            if not hasattr(self, "last_enabled"):
528
 
                self.last_enabled = datetime.datetime.utcnow()
529
 
            if not hasattr(self, "expires"):
530
 
                self.expires = (datetime.datetime.utcnow()
531
 
                                + self.timeout)
532
 
        else:
533
 
            self.last_enabled = None
534
 
            self.expires = None
535
 
        
536
 
        logger.debug("Creating client %r", self.name)
 
233
        logger.debug(u"Creating client %r", self.name)
537
234
        # Uppercase and remove spaces from fingerprint for later
538
235
        # comparison purposes with return value from the fingerprint()
539
236
        # function
540
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
541
 
        self.created = settings.get("created",
542
 
                                    datetime.datetime.utcnow())
543
 
        
544
 
        # attributes specific for this server instance
 
237
        self.fingerprint = config["fingerprint"].upper()\
 
238
                           .replace(u" ", u"")
 
239
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
 
240
        if "secret" in config:
 
241
            self.secret = config["secret"].decode(u"base64")
 
242
        elif "secfile" in config:
 
243
            secfile = open(config["secfile"])
 
244
            self.secret = secfile.read()
 
245
            secfile.close()
 
246
        else:
 
247
            raise TypeError(u"No secret or secfile for client %s"
 
248
                            % self.name)
 
249
        self.host = config.get("host", "")
 
250
        self.created = datetime.datetime.now()
 
251
        self.last_checked_ok = None
 
252
        self.timeout = string_to_delta(config["timeout"])
 
253
        self.interval = string_to_delta(config["interval"])
 
254
        self.stop_hook = stop_hook
545
255
        self.checker = None
546
256
        self.checker_initiator_tag = None
547
 
        self.disable_initiator_tag = None
 
257
        self.stop_initiator_tag = None
548
258
        self.checker_callback_tag = None
549
 
        self.current_checker_command = None
550
 
        self.approved = None
551
 
        self.approvals_pending = 0
552
 
        self.changedstate = (multiprocessing_manager
553
 
                             .Condition(multiprocessing_manager
554
 
                                        .Lock()))
555
 
        self.client_structure = [attr for attr in
556
 
                                 self.__dict__.iterkeys()
557
 
                                 if not attr.startswith("_")]
558
 
        self.client_structure.append("client_structure")
559
 
        
560
 
        for name, t in inspect.getmembers(type(self),
561
 
                                          lambda obj:
562
 
                                              isinstance(obj,
563
 
                                                         property)):
564
 
            if not name.startswith("_"):
565
 
                self.client_structure.append(name)
566
 
    
567
 
    # Send notice to process children that client state has changed
568
 
    def send_changedstate(self):
569
 
        with self.changedstate:
570
 
            self.changedstate.notify_all()
571
 
    
572
 
    def enable(self):
 
259
        self.check_command = config["checker"]
 
260
    def start(self):
573
261
        """Start this client's checker and timeout hooks"""
574
 
        if getattr(self, "enabled", False):
575
 
            # Already enabled
576
 
            return
577
 
        self.expires = datetime.datetime.utcnow() + self.timeout
578
 
        self.enabled = True
579
 
        self.last_enabled = datetime.datetime.utcnow()
580
 
        self.init_checker()
581
 
        self.send_changedstate()
582
 
    
583
 
    def disable(self, quiet=True):
584
 
        """Disable this client."""
585
 
        if not getattr(self, "enabled", False):
586
 
            return False
587
 
        if not quiet:
588
 
            logger.info("Disabling client %s", self.name)
589
 
        if getattr(self, "disable_initiator_tag", None) is not None:
590
 
            gobject.source_remove(self.disable_initiator_tag)
591
 
            self.disable_initiator_tag = None
592
 
        self.expires = None
593
 
        if getattr(self, "checker_initiator_tag", None) is not None:
594
 
            gobject.source_remove(self.checker_initiator_tag)
595
 
            self.checker_initiator_tag = None
596
 
        self.stop_checker()
597
 
        self.enabled = False
598
 
        if not quiet:
599
 
            self.send_changedstate()
600
 
        # Do not run this again if called by a gobject.timeout_add
601
 
        return False
602
 
    
603
 
    def __del__(self):
604
 
        self.disable()
605
 
    
606
 
    def init_checker(self):
607
262
        # Schedule a new checker to be started an 'interval' from now,
608
263
        # and every interval from then on.
609
 
        if self.checker_initiator_tag is not None:
610
 
            gobject.source_remove(self.checker_initiator_tag)
611
 
        self.checker_initiator_tag = (gobject.timeout_add
612
 
                                      (int(self.interval
613
 
                                           .total_seconds() * 1000),
614
 
                                       self.start_checker))
615
 
        # Schedule a disable() when 'timeout' has passed
616
 
        if self.disable_initiator_tag is not None:
617
 
            gobject.source_remove(self.disable_initiator_tag)
618
 
        self.disable_initiator_tag = (gobject.timeout_add
619
 
                                      (int(self.timeout
620
 
                                           .total_seconds() * 1000),
621
 
                                       self.disable))
 
264
        self.checker_initiator_tag = gobject.timeout_add\
 
265
                                     (self._interval_milliseconds,
 
266
                                      self.start_checker)
622
267
        # Also start a new checker *right now*.
623
268
        self.start_checker()
624
 
    
625
 
    def checker_callback(self, pid, condition, command):
 
269
        # Schedule a stop() when 'timeout' has passed
 
270
        self.stop_initiator_tag = gobject.timeout_add\
 
271
                                  (self._timeout_milliseconds,
 
272
                                   self.stop)
 
273
    def stop(self):
 
274
        """Stop this client.
 
275
        The possibility that a client might be restarted is left open,
 
276
        but not currently used."""
 
277
        # If this client doesn't have a secret, it is already stopped.
 
278
        if hasattr(self, "secret") and self.secret:
 
279
            logger.info(u"Stopping client %s", self.name)
 
280
            self.secret = None
 
281
        else:
 
282
            return False
 
283
        if getattr(self, "stop_initiator_tag", False):
 
284
            gobject.source_remove(self.stop_initiator_tag)
 
285
            self.stop_initiator_tag = None
 
286
        if getattr(self, "checker_initiator_tag", False):
 
287
            gobject.source_remove(self.checker_initiator_tag)
 
288
            self.checker_initiator_tag = None
 
289
        self.stop_checker()
 
290
        if self.stop_hook:
 
291
            self.stop_hook(self)
 
292
        # Do not run this again if called by a gobject.timeout_add
 
293
        return False
 
294
    def __del__(self):
 
295
        self.stop_hook = None
 
296
        self.stop()
 
297
    def checker_callback(self, pid, condition):
626
298
        """The checker has completed, so take appropriate actions."""
 
299
        now = datetime.datetime.now()
627
300
        self.checker_callback_tag = None
628
301
        self.checker = None
629
 
        if os.WIFEXITED(condition):
630
 
            self.last_checker_status = os.WEXITSTATUS(condition)
631
 
            if self.last_checker_status == 0:
632
 
                logger.info("Checker for %(name)s succeeded",
633
 
                            vars(self))
634
 
                self.checked_ok()
635
 
            else:
636
 
                logger.info("Checker for %(name)s failed",
637
 
                            vars(self))
638
 
        else:
639
 
            self.last_checker_status = -1
640
 
            logger.warning("Checker for %(name)s crashed?",
 
302
        if os.WIFEXITED(condition) \
 
303
               and (os.WEXITSTATUS(condition) == 0):
 
304
            logger.info(u"Checker for %(name)s succeeded",
 
305
                        vars(self))
 
306
            self.last_checked_ok = now
 
307
            gobject.source_remove(self.stop_initiator_tag)
 
308
            self.stop_initiator_tag = gobject.timeout_add\
 
309
                                      (self._timeout_milliseconds,
 
310
                                       self.stop)
 
311
        elif not os.WIFEXITED(condition):
 
312
            logger.warning(u"Checker for %(name)s crashed?",
641
313
                           vars(self))
642
 
    
643
 
    def checked_ok(self):
644
 
        """Assert that the client has been seen, alive and well."""
645
 
        self.last_checked_ok = datetime.datetime.utcnow()
646
 
        self.last_checker_status = 0
647
 
        self.bump_timeout()
648
 
    
649
 
    def bump_timeout(self, timeout=None):
650
 
        """Bump up the timeout for this client."""
651
 
        if timeout is None:
652
 
            timeout = self.timeout
653
 
        if self.disable_initiator_tag is not None:
654
 
            gobject.source_remove(self.disable_initiator_tag)
655
 
            self.disable_initiator_tag = None
656
 
        if getattr(self, "enabled", False):
657
 
            self.disable_initiator_tag = (gobject.timeout_add
658
 
                                          (int(timeout.total_seconds()
659
 
                                               * 1000), self.disable))
660
 
            self.expires = datetime.datetime.utcnow() + timeout
661
 
    
662
 
    def need_approval(self):
663
 
        self.last_approval_request = datetime.datetime.utcnow()
664
 
    
 
314
        else:
 
315
            logger.info(u"Checker for %(name)s failed",
 
316
                        vars(self))
665
317
    def start_checker(self):
666
318
        """Start a new checker subprocess if one is not running.
667
 
        
668
319
        If a checker already exists, leave it running and do
669
320
        nothing."""
670
321
        # The reason for not killing a running checker is that if we
671
 
        # did that, and if a checker (for some reason) started running
672
 
        # slowly and taking more than 'interval' time, then the client
673
 
        # would inevitably timeout, since no checker would get a
674
 
        # chance to run to completion.  If we instead leave running
 
322
        # did that, then if a checker (for some reason) started
 
323
        # running slowly and taking more than 'interval' time, the
 
324
        # client would inevitably timeout, since no checker would get
 
325
        # a chance to run to completion.  If we instead leave running
675
326
        # checkers alone, the checker would have to take more time
676
 
        # than 'timeout' for the client to be disabled, which is as it
677
 
        # should be.
678
 
        
679
 
        # If a checker exists, make sure it is not a zombie
680
 
        try:
681
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
682
 
        except AttributeError:
683
 
            pass
684
 
        except OSError as error:
685
 
            if error.errno != errno.ECHILD:
686
 
                raise
687
 
        else:
688
 
            if pid:
689
 
                logger.warning("Checker was a zombie")
690
 
                gobject.source_remove(self.checker_callback_tag)
691
 
                self.checker_callback(pid, status,
692
 
                                      self.current_checker_command)
693
 
        # Start a new checker if needed
 
327
        # than 'timeout' for the client to be declared invalid, which
 
328
        # is as it should be.
694
329
        if self.checker is None:
695
 
            # Escape attributes for the shell
696
 
            escaped_attrs = { attr:
697
 
                                  re.escape(str(getattr(self, attr)))
698
 
                              for attr in self.runtime_expansions }
699
 
            try:
700
 
                command = self.checker_command % escaped_attrs
701
 
            except TypeError as error:
702
 
                logger.error('Could not format string "%s"',
703
 
                             self.checker_command, exc_info=error)
704
 
                return True # Try again later
705
 
            self.current_checker_command = command
706
 
            try:
707
 
                logger.info("Starting checker %r for %s",
 
330
            try:
 
331
                # In case check_command has exactly one % operator
 
332
                command = self.check_command % self.host
 
333
            except TypeError:
 
334
                # Escape attributes for the shell
 
335
                escaped_attrs = dict((key, re.escape(str(val)))
 
336
                                     for key, val in
 
337
                                     vars(self).iteritems())
 
338
                try:
 
339
                    command = self.check_command % escaped_attrs
 
340
                except TypeError, error:
 
341
                    logger.error(u'Could not format string "%s":'
 
342
                                 u' %s', self.check_command, error)
 
343
                    return True # Try again later
 
344
            try:
 
345
                logger.info(u"Starting checker %r for %s",
708
346
                            command, self.name)
709
347
                # We don't need to redirect stdout and stderr, since
710
348
                # in normal mode, that is already done by daemon(),
711
349
                # and in debug mode we don't want to.  (Stdin is
712
350
                # always replaced by /dev/null.)
713
 
                # The exception is when not debugging but nevertheless
714
 
                # running in the foreground; use the previously
715
 
                # created wnull.
716
 
                popen_args = {}
717
 
                if (not self.server_settings["debug"]
718
 
                    and self.server_settings["foreground"]):
719
 
                    popen_args.update({"stdout": wnull,
720
 
                                       "stderr": wnull })
721
351
                self.checker = subprocess.Popen(command,
722
352
                                                close_fds=True,
723
 
                                                shell=True, cwd="/",
724
 
                                                **popen_args)
725
 
            except OSError as error:
726
 
                logger.error("Failed to start subprocess",
727
 
                             exc_info=error)
728
 
                return True
729
 
            self.checker_callback_tag = (gobject.child_watch_add
730
 
                                         (self.checker.pid,
731
 
                                          self.checker_callback,
732
 
                                          data=command))
733
 
            # The checker may have completed before the gobject
734
 
            # watch was added.  Check for this.
735
 
            try:
736
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
737
 
            except OSError as error:
738
 
                if error.errno == errno.ECHILD:
739
 
                    # This should never happen
740
 
                    logger.error("Child process vanished",
741
 
                                 exc_info=error)
742
 
                    return True
743
 
                raise
744
 
            if pid:
745
 
                gobject.source_remove(self.checker_callback_tag)
746
 
                self.checker_callback(pid, status, command)
 
353
                                                shell=True, cwd="/")
 
354
                self.checker_callback_tag = gobject.child_watch_add\
 
355
                                            (self.checker.pid,
 
356
                                             self.checker_callback)
 
357
            except OSError, error:
 
358
                logger.error(u"Failed to start subprocess: %s",
 
359
                             error)
747
360
        # Re-run this periodically if run by gobject.timeout_add
748
361
        return True
749
 
    
750
362
    def stop_checker(self):
751
363
        """Force the checker process, if any, to stop."""
752
364
        if self.checker_callback_tag:
754
366
            self.checker_callback_tag = None
755
367
        if getattr(self, "checker", None) is None:
756
368
            return
757
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
369
        logger.debug(u"Stopping checker for %(name)s", vars(self))
758
370
        try:
759
 
            self.checker.terminate()
760
 
            #time.sleep(0.5)
 
371
            os.kill(self.checker.pid, signal.SIGTERM)
 
372
            #os.sleep(0.5)
761
373
            #if self.checker.poll() is None:
762
 
            #    self.checker.kill()
763
 
        except OSError as error:
 
374
            #    os.kill(self.checker.pid, signal.SIGKILL)
 
375
        except OSError, error:
764
376
            if error.errno != errno.ESRCH: # No such process
765
377
                raise
766
378
        self.checker = None
767
 
 
768
 
 
769
 
def dbus_service_property(dbus_interface, signature="v",
770
 
                          access="readwrite", byte_arrays=False):
771
 
    """Decorators for marking methods of a DBusObjectWithProperties to
772
 
    become properties on the D-Bus.
773
 
    
774
 
    The decorated method will be called with no arguments by "Get"
775
 
    and with one argument by "Set".
776
 
    
777
 
    The parameters, where they are supported, are the same as
778
 
    dbus.service.method, except there is only "signature", since the
779
 
    type from Get() and the type sent to Set() is the same.
780
 
    """
781
 
    # Encoding deeply encoded byte arrays is not supported yet by the
782
 
    # "Set" method, so we fail early here:
783
 
    if byte_arrays and signature != "ay":
784
 
        raise ValueError("Byte arrays not supported for non-'ay'"
785
 
                         " signature {!r}".format(signature))
786
 
    def decorator(func):
787
 
        func._dbus_is_property = True
788
 
        func._dbus_interface = dbus_interface
789
 
        func._dbus_signature = signature
790
 
        func._dbus_access = access
791
 
        func._dbus_name = func.__name__
792
 
        if func._dbus_name.endswith("_dbus_property"):
793
 
            func._dbus_name = func._dbus_name[:-14]
794
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
795
 
        return func
796
 
    return decorator
797
 
 
798
 
 
799
 
def dbus_interface_annotations(dbus_interface):
800
 
    """Decorator for marking functions returning interface annotations
801
 
    
802
 
    Usage:
803
 
    
804
 
    @dbus_interface_annotations("org.example.Interface")
805
 
    def _foo(self):  # Function name does not matter
806
 
        return {"org.freedesktop.DBus.Deprecated": "true",
807
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
808
 
                    "false"}
809
 
    """
810
 
    def decorator(func):
811
 
        func._dbus_is_interface = True
812
 
        func._dbus_interface = dbus_interface
813
 
        func._dbus_name = dbus_interface
814
 
        return func
815
 
    return decorator
816
 
 
817
 
 
818
 
def dbus_annotations(annotations):
819
 
    """Decorator to annotate D-Bus methods, signals or properties
820
 
    Usage:
821
 
    
822
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
823
 
                       "org.freedesktop.DBus.Property."
824
 
                       "EmitsChangedSignal": "false"})
825
 
    @dbus_service_property("org.example.Interface", signature="b",
826
 
                           access="r")
827
 
    def Property_dbus_property(self):
828
 
        return dbus.Boolean(False)
829
 
    """
830
 
    def decorator(func):
831
 
        func._dbus_annotations = annotations
832
 
        return func
833
 
    return decorator
834
 
 
835
 
 
836
 
class DBusPropertyException(dbus.exceptions.DBusException):
837
 
    """A base class for D-Bus property-related exceptions
838
 
    """
839
 
    pass
840
 
 
841
 
class DBusPropertyAccessException(DBusPropertyException):
842
 
    """A property's access permissions disallows an operation.
843
 
    """
844
 
    pass
845
 
 
846
 
 
847
 
class DBusPropertyNotFound(DBusPropertyException):
848
 
    """An attempt was made to access a non-existing property.
849
 
    """
850
 
    pass
851
 
 
852
 
 
853
 
class DBusObjectWithProperties(dbus.service.Object):
854
 
    """A D-Bus object with properties.
855
 
    
856
 
    Classes inheriting from this can use the dbus_service_property
857
 
    decorator to expose methods as D-Bus properties.  It exposes the
858
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
859
 
    """
860
 
    
861
 
    @staticmethod
862
 
    def _is_dbus_thing(thing):
863
 
        """Returns a function testing if an attribute is a D-Bus thing
864
 
        
865
 
        If called like _is_dbus_thing("method") it returns a function
866
 
        suitable for use as predicate to inspect.getmembers().
867
 
        """
868
 
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
869
 
                                   False)
870
 
    
871
 
    def _get_all_dbus_things(self, thing):
872
 
        """Returns a generator of (name, attribute) pairs
873
 
        """
874
 
        return ((getattr(athing.__get__(self), "_dbus_name",
875
 
                         name),
876
 
                 athing.__get__(self))
877
 
                for cls in self.__class__.__mro__
878
 
                for name, athing in
879
 
                inspect.getmembers(cls,
880
 
                                   self._is_dbus_thing(thing)))
881
 
    
882
 
    def _get_dbus_property(self, interface_name, property_name):
883
 
        """Returns a bound method if one exists which is a D-Bus
884
 
        property with the specified name and interface.
885
 
        """
886
 
        for cls in  self.__class__.__mro__:
887
 
            for name, value in (inspect.getmembers
888
 
                                (cls,
889
 
                                 self._is_dbus_thing("property"))):
890
 
                if (value._dbus_name == property_name
891
 
                    and value._dbus_interface == interface_name):
892
 
                    return value.__get__(self)
893
 
        
894
 
        # No such property
895
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
896
 
                                   + interface_name + "."
897
 
                                   + property_name)
898
 
    
899
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
900
 
                         out_signature="v")
901
 
    def Get(self, interface_name, property_name):
902
 
        """Standard D-Bus property Get() method, see D-Bus standard.
903
 
        """
904
 
        prop = self._get_dbus_property(interface_name, property_name)
905
 
        if prop._dbus_access == "write":
906
 
            raise DBusPropertyAccessException(property_name)
907
 
        value = prop()
908
 
        if not hasattr(value, "variant_level"):
909
 
            return value
910
 
        return type(value)(value, variant_level=value.variant_level+1)
911
 
    
912
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
913
 
    def Set(self, interface_name, property_name, value):
914
 
        """Standard D-Bus property Set() method, see D-Bus standard.
915
 
        """
916
 
        prop = self._get_dbus_property(interface_name, property_name)
917
 
        if prop._dbus_access == "read":
918
 
            raise DBusPropertyAccessException(property_name)
919
 
        if prop._dbus_get_args_options["byte_arrays"]:
920
 
            # The byte_arrays option is not supported yet on
921
 
            # signatures other than "ay".
922
 
            if prop._dbus_signature != "ay":
923
 
                raise ValueError("Byte arrays not supported for non-"
924
 
                                 "'ay' signature {!r}"
925
 
                                 .format(prop._dbus_signature))
926
 
            value = dbus.ByteArray(b''.join(chr(byte)
927
 
                                            for byte in value))
928
 
        prop(value)
929
 
    
930
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
931
 
                         out_signature="a{sv}")
932
 
    def GetAll(self, interface_name):
933
 
        """Standard D-Bus property GetAll() method, see D-Bus
934
 
        standard.
935
 
        
936
 
        Note: Will not include properties with access="write".
937
 
        """
938
 
        properties = {}
939
 
        for name, prop in self._get_all_dbus_things("property"):
940
 
            if (interface_name
941
 
                and interface_name != prop._dbus_interface):
942
 
                # Interface non-empty but did not match
943
 
                continue
944
 
            # Ignore write-only properties
945
 
            if prop._dbus_access == "write":
946
 
                continue
947
 
            value = prop()
948
 
            if not hasattr(value, "variant_level"):
949
 
                properties[name] = value
950
 
                continue
951
 
            properties[name] = type(value)(value, variant_level=
952
 
                                           value.variant_level+1)
953
 
        return dbus.Dictionary(properties, signature="sv")
954
 
    
955
 
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
956
 
    def PropertiesChanged(self, interface_name, changed_properties,
957
 
                          invalidated_properties):
958
 
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
959
 
        standard.
960
 
        """
961
 
        pass
962
 
    
963
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
964
 
                         out_signature="s",
965
 
                         path_keyword='object_path',
966
 
                         connection_keyword='connection')
967
 
    def Introspect(self, object_path, connection):
968
 
        """Overloading of standard D-Bus method.
969
 
        
970
 
        Inserts property tags and interface annotation tags.
971
 
        """
972
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
973
 
                                                   connection)
974
 
        try:
975
 
            document = xml.dom.minidom.parseString(xmlstring)
976
 
            def make_tag(document, name, prop):
977
 
                e = document.createElement("property")
978
 
                e.setAttribute("name", name)
979
 
                e.setAttribute("type", prop._dbus_signature)
980
 
                e.setAttribute("access", prop._dbus_access)
981
 
                return e
982
 
            for if_tag in document.getElementsByTagName("interface"):
983
 
                # Add property tags
984
 
                for tag in (make_tag(document, name, prop)
985
 
                            for name, prop
986
 
                            in self._get_all_dbus_things("property")
987
 
                            if prop._dbus_interface
988
 
                            == if_tag.getAttribute("name")):
989
 
                    if_tag.appendChild(tag)
990
 
                # Add annotation tags
991
 
                for typ in ("method", "signal", "property"):
992
 
                    for tag in if_tag.getElementsByTagName(typ):
993
 
                        annots = dict()
994
 
                        for name, prop in (self.
995
 
                                           _get_all_dbus_things(typ)):
996
 
                            if (name == tag.getAttribute("name")
997
 
                                and prop._dbus_interface
998
 
                                == if_tag.getAttribute("name")):
999
 
                                annots.update(getattr
1000
 
                                              (prop,
1001
 
                                               "_dbus_annotations",
1002
 
                                               {}))
1003
 
                        for name, value in annots.items():
1004
 
                            ann_tag = document.createElement(
1005
 
                                "annotation")
1006
 
                            ann_tag.setAttribute("name", name)
1007
 
                            ann_tag.setAttribute("value", value)
1008
 
                            tag.appendChild(ann_tag)
1009
 
                # Add interface annotation tags
1010
 
                for annotation, value in dict(
1011
 
                    itertools.chain.from_iterable(
1012
 
                        annotations().items()
1013
 
                        for name, annotations in
1014
 
                        self._get_all_dbus_things("interface")
1015
 
                        if name == if_tag.getAttribute("name")
1016
 
                        )).items():
1017
 
                    ann_tag = document.createElement("annotation")
1018
 
                    ann_tag.setAttribute("name", annotation)
1019
 
                    ann_tag.setAttribute("value", value)
1020
 
                    if_tag.appendChild(ann_tag)
1021
 
                # Add the names to the return values for the
1022
 
                # "org.freedesktop.DBus.Properties" methods
1023
 
                if (if_tag.getAttribute("name")
1024
 
                    == "org.freedesktop.DBus.Properties"):
1025
 
                    for cn in if_tag.getElementsByTagName("method"):
1026
 
                        if cn.getAttribute("name") == "Get":
1027
 
                            for arg in cn.getElementsByTagName("arg"):
1028
 
                                if (arg.getAttribute("direction")
1029
 
                                    == "out"):
1030
 
                                    arg.setAttribute("name", "value")
1031
 
                        elif cn.getAttribute("name") == "GetAll":
1032
 
                            for arg in cn.getElementsByTagName("arg"):
1033
 
                                if (arg.getAttribute("direction")
1034
 
                                    == "out"):
1035
 
                                    arg.setAttribute("name", "props")
1036
 
            xmlstring = document.toxml("utf-8")
1037
 
            document.unlink()
1038
 
        except (AttributeError, xml.dom.DOMException,
1039
 
                xml.parsers.expat.ExpatError) as error:
1040
 
            logger.error("Failed to override Introspection method",
1041
 
                         exc_info=error)
1042
 
        return xmlstring
1043
 
 
1044
 
 
1045
 
def datetime_to_dbus(dt, variant_level=0):
1046
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1047
 
    if dt is None:
1048
 
        return dbus.String("", variant_level = variant_level)
1049
 
    return dbus.String(dt.isoformat(),
1050
 
                       variant_level=variant_level)
1051
 
 
1052
 
 
1053
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1054
 
    """A class decorator; applied to a subclass of
1055
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1056
 
    interface names according to the "alt_interface_names" mapping.
1057
 
    Usage:
1058
 
    
1059
 
    @alternate_dbus_interfaces({"org.example.Interface":
1060
 
                                    "net.example.AlternateInterface"})
1061
 
    class SampleDBusObject(dbus.service.Object):
1062
 
        @dbus.service.method("org.example.Interface")
1063
 
        def SampleDBusMethod():
1064
 
            pass
1065
 
    
1066
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1067
 
    reachable via two interfaces: "org.example.Interface" and
1068
 
    "net.example.AlternateInterface", the latter of which will have
1069
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1070
 
    "true", unless "deprecate" is passed with a False value.
1071
 
    
1072
 
    This works for methods and signals, and also for D-Bus properties
1073
 
    (from DBusObjectWithProperties) and interfaces (from the
1074
 
    dbus_interface_annotations decorator).
1075
 
    """
1076
 
    def wrapper(cls):
1077
 
        for orig_interface_name, alt_interface_name in (
1078
 
            alt_interface_names.items()):
1079
 
            attr = {}
1080
 
            interface_names = set()
1081
 
            # Go though all attributes of the class
1082
 
            for attrname, attribute in inspect.getmembers(cls):
1083
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1084
 
                # with the wrong interface name
1085
 
                if (not hasattr(attribute, "_dbus_interface")
1086
 
                    or not attribute._dbus_interface
1087
 
                    .startswith(orig_interface_name)):
1088
 
                    continue
1089
 
                # Create an alternate D-Bus interface name based on
1090
 
                # the current name
1091
 
                alt_interface = (attribute._dbus_interface
1092
 
                                 .replace(orig_interface_name,
1093
 
                                          alt_interface_name))
1094
 
                interface_names.add(alt_interface)
1095
 
                # Is this a D-Bus signal?
1096
 
                if getattr(attribute, "_dbus_is_signal", False):
1097
 
                    # Extract the original non-method undecorated
1098
 
                    # function by black magic
1099
 
                    nonmethod_func = (dict(
1100
 
                            zip(attribute.func_code.co_freevars,
1101
 
                                attribute.__closure__))["func"]
1102
 
                                      .cell_contents)
1103
 
                    # Create a new, but exactly alike, function
1104
 
                    # object, and decorate it to be a new D-Bus signal
1105
 
                    # with the alternate D-Bus interface name
1106
 
                    new_function = (dbus.service.signal
1107
 
                                    (alt_interface,
1108
 
                                     attribute._dbus_signature)
1109
 
                                    (types.FunctionType(
1110
 
                                nonmethod_func.func_code,
1111
 
                                nonmethod_func.func_globals,
1112
 
                                nonmethod_func.func_name,
1113
 
                                nonmethod_func.func_defaults,
1114
 
                                nonmethod_func.func_closure)))
1115
 
                    # Copy annotations, if any
1116
 
                    try:
1117
 
                        new_function._dbus_annotations = (
1118
 
                            dict(attribute._dbus_annotations))
1119
 
                    except AttributeError:
1120
 
                        pass
1121
 
                    # Define a creator of a function to call both the
1122
 
                    # original and alternate functions, so both the
1123
 
                    # original and alternate signals gets sent when
1124
 
                    # the function is called
1125
 
                    def fixscope(func1, func2):
1126
 
                        """This function is a scope container to pass
1127
 
                        func1 and func2 to the "call_both" function
1128
 
                        outside of its arguments"""
1129
 
                        def call_both(*args, **kwargs):
1130
 
                            """This function will emit two D-Bus
1131
 
                            signals by calling func1 and func2"""
1132
 
                            func1(*args, **kwargs)
1133
 
                            func2(*args, **kwargs)
1134
 
                        return call_both
1135
 
                    # Create the "call_both" function and add it to
1136
 
                    # the class
1137
 
                    attr[attrname] = fixscope(attribute, new_function)
1138
 
                # Is this a D-Bus method?
1139
 
                elif getattr(attribute, "_dbus_is_method", False):
1140
 
                    # Create a new, but exactly alike, function
1141
 
                    # object.  Decorate it to be a new D-Bus method
1142
 
                    # with the alternate D-Bus interface name.  Add it
1143
 
                    # to the class.
1144
 
                    attr[attrname] = (dbus.service.method
1145
 
                                      (alt_interface,
1146
 
                                       attribute._dbus_in_signature,
1147
 
                                       attribute._dbus_out_signature)
1148
 
                                      (types.FunctionType
1149
 
                                       (attribute.func_code,
1150
 
                                        attribute.func_globals,
1151
 
                                        attribute.func_name,
1152
 
                                        attribute.func_defaults,
1153
 
                                        attribute.func_closure)))
1154
 
                    # Copy annotations, if any
1155
 
                    try:
1156
 
                        attr[attrname]._dbus_annotations = (
1157
 
                            dict(attribute._dbus_annotations))
1158
 
                    except AttributeError:
1159
 
                        pass
1160
 
                # Is this a D-Bus property?
1161
 
                elif getattr(attribute, "_dbus_is_property", False):
1162
 
                    # Create a new, but exactly alike, function
1163
 
                    # object, and decorate it to be a new D-Bus
1164
 
                    # property with the alternate D-Bus interface
1165
 
                    # name.  Add it to the class.
1166
 
                    attr[attrname] = (dbus_service_property
1167
 
                                      (alt_interface,
1168
 
                                       attribute._dbus_signature,
1169
 
                                       attribute._dbus_access,
1170
 
                                       attribute
1171
 
                                       ._dbus_get_args_options
1172
 
                                       ["byte_arrays"])
1173
 
                                      (types.FunctionType
1174
 
                                       (attribute.func_code,
1175
 
                                        attribute.func_globals,
1176
 
                                        attribute.func_name,
1177
 
                                        attribute.func_defaults,
1178
 
                                        attribute.func_closure)))
1179
 
                    # Copy annotations, if any
1180
 
                    try:
1181
 
                        attr[attrname]._dbus_annotations = (
1182
 
                            dict(attribute._dbus_annotations))
1183
 
                    except AttributeError:
1184
 
                        pass
1185
 
                # Is this a D-Bus interface?
1186
 
                elif getattr(attribute, "_dbus_is_interface", False):
1187
 
                    # Create a new, but exactly alike, function
1188
 
                    # object.  Decorate it to be a new D-Bus interface
1189
 
                    # with the alternate D-Bus interface name.  Add it
1190
 
                    # to the class.
1191
 
                    attr[attrname] = (dbus_interface_annotations
1192
 
                                      (alt_interface)
1193
 
                                      (types.FunctionType
1194
 
                                       (attribute.func_code,
1195
 
                                        attribute.func_globals,
1196
 
                                        attribute.func_name,
1197
 
                                        attribute.func_defaults,
1198
 
                                        attribute.func_closure)))
1199
 
            if deprecate:
1200
 
                # Deprecate all alternate interfaces
1201
 
                iname="_AlternateDBusNames_interface_annotation{}"
1202
 
                for interface_name in interface_names:
1203
 
                    @dbus_interface_annotations(interface_name)
1204
 
                    def func(self):
1205
 
                        return { "org.freedesktop.DBus.Deprecated":
1206
 
                                     "true" }
1207
 
                    # Find an unused name
1208
 
                    for aname in (iname.format(i)
1209
 
                                  for i in itertools.count()):
1210
 
                        if aname not in attr:
1211
 
                            attr[aname] = func
1212
 
                            break
1213
 
            if interface_names:
1214
 
                # Replace the class with a new subclass of it with
1215
 
                # methods, signals, etc. as created above.
1216
 
                cls = type(b"{}Alternate".format(cls.__name__),
1217
 
                           (cls,), attr)
1218
 
        return cls
1219
 
    return wrapper
1220
 
 
1221
 
 
1222
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1223
 
                                "se.bsnet.fukt.Mandos"})
1224
 
class ClientDBus(Client, DBusObjectWithProperties):
1225
 
    """A Client class using D-Bus
1226
 
    
1227
 
    Attributes:
1228
 
    dbus_object_path: dbus.ObjectPath
1229
 
    bus: dbus.SystemBus()
1230
 
    """
1231
 
    
1232
 
    runtime_expansions = (Client.runtime_expansions
1233
 
                          + ("dbus_object_path",))
1234
 
    
1235
 
    _interface = "se.recompile.Mandos.Client"
1236
 
    
1237
 
    # dbus.service.Object doesn't use super(), so we can't either.
1238
 
    
1239
 
    def __init__(self, bus = None, *args, **kwargs):
1240
 
        self.bus = bus
1241
 
        Client.__init__(self, *args, **kwargs)
1242
 
        # Only now, when this client is initialized, can it show up on
1243
 
        # the D-Bus
1244
 
        client_object_name = str(self.name).translate(
1245
 
            {ord("."): ord("_"),
1246
 
             ord("-"): ord("_")})
1247
 
        self.dbus_object_path = (dbus.ObjectPath
1248
 
                                 ("/clients/" + client_object_name))
1249
 
        DBusObjectWithProperties.__init__(self, self.bus,
1250
 
                                          self.dbus_object_path)
1251
 
    
1252
 
    def notifychangeproperty(transform_func,
1253
 
                             dbus_name, type_func=lambda x: x,
1254
 
                             variant_level=1, invalidate_only=False,
1255
 
                             _interface=_interface):
1256
 
        """ Modify a variable so that it's a property which announces
1257
 
        its changes to DBus.
1258
 
        
1259
 
        transform_fun: Function that takes a value and a variant_level
1260
 
                       and transforms it to a D-Bus type.
1261
 
        dbus_name: D-Bus name of the variable
1262
 
        type_func: Function that transform the value before sending it
1263
 
                   to the D-Bus.  Default: no transform
1264
 
        variant_level: D-Bus variant level.  Default: 1
1265
 
        """
1266
 
        attrname = "_{}".format(dbus_name)
1267
 
        def setter(self, value):
1268
 
            if hasattr(self, "dbus_object_path"):
1269
 
                if (not hasattr(self, attrname) or
1270
 
                    type_func(getattr(self, attrname, None))
1271
 
                    != type_func(value)):
1272
 
                    if invalidate_only:
1273
 
                        self.PropertiesChanged(_interface,
1274
 
                                               dbus.Dictionary(),
1275
 
                                               dbus.Array
1276
 
                                               ((dbus_name,)))
1277
 
                    else:
1278
 
                        dbus_value = transform_func(type_func(value),
1279
 
                                                    variant_level
1280
 
                                                    =variant_level)
1281
 
                        self.PropertyChanged(dbus.String(dbus_name),
1282
 
                                             dbus_value)
1283
 
                        self.PropertiesChanged(_interface,
1284
 
                                               dbus.Dictionary({
1285
 
                                    dbus.String(dbus_name):
1286
 
                                        dbus_value }), dbus.Array())
1287
 
            setattr(self, attrname, value)
1288
 
        
1289
 
        return property(lambda self: getattr(self, attrname), setter)
1290
 
    
1291
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1292
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1293
 
                                             "ApprovalPending",
1294
 
                                             type_func = bool)
1295
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1296
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1297
 
                                        "LastEnabled")
1298
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1299
 
                                   type_func = lambda checker:
1300
 
                                       checker is not None)
1301
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1302
 
                                           "LastCheckedOK")
1303
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1304
 
                                               "LastCheckerStatus")
1305
 
    last_approval_request = notifychangeproperty(
1306
 
        datetime_to_dbus, "LastApprovalRequest")
1307
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1308
 
                                               "ApprovedByDefault")
1309
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1310
 
                                          "ApprovalDelay",
1311
 
                                          type_func =
1312
 
                                          lambda td: td.total_seconds()
1313
 
                                          * 1000)
1314
 
    approval_duration = notifychangeproperty(
1315
 
        dbus.UInt64, "ApprovalDuration",
1316
 
        type_func = lambda td: td.total_seconds() * 1000)
1317
 
    host = notifychangeproperty(dbus.String, "Host")
1318
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1319
 
                                   type_func = lambda td:
1320
 
                                       td.total_seconds() * 1000)
1321
 
    extended_timeout = notifychangeproperty(
1322
 
        dbus.UInt64, "ExtendedTimeout",
1323
 
        type_func = lambda td: td.total_seconds() * 1000)
1324
 
    interval = notifychangeproperty(dbus.UInt64,
1325
 
                                    "Interval",
1326
 
                                    type_func =
1327
 
                                    lambda td: td.total_seconds()
1328
 
                                    * 1000)
1329
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1330
 
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
1331
 
                                  invalidate_only=True)
1332
 
    
1333
 
    del notifychangeproperty
1334
 
    
1335
 
    def __del__(self, *args, **kwargs):
1336
 
        try:
1337
 
            self.remove_from_connection()
1338
 
        except LookupError:
1339
 
            pass
1340
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1341
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1342
 
        Client.__del__(self, *args, **kwargs)
1343
 
    
1344
 
    def checker_callback(self, pid, condition, command,
1345
 
                         *args, **kwargs):
1346
 
        self.checker_callback_tag = None
1347
 
        self.checker = None
1348
 
        if os.WIFEXITED(condition):
1349
 
            exitstatus = os.WEXITSTATUS(condition)
1350
 
            # Emit D-Bus signal
1351
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1352
 
                                  dbus.Int64(condition),
1353
 
                                  dbus.String(command))
1354
 
        else:
1355
 
            # Emit D-Bus signal
1356
 
            self.CheckerCompleted(dbus.Int16(-1),
1357
 
                                  dbus.Int64(condition),
1358
 
                                  dbus.String(command))
1359
 
        
1360
 
        return Client.checker_callback(self, pid, condition, command,
1361
 
                                       *args, **kwargs)
1362
 
    
1363
 
    def start_checker(self, *args, **kwargs):
1364
 
        old_checker_pid = getattr(self.checker, "pid", None)
1365
 
        r = Client.start_checker(self, *args, **kwargs)
1366
 
        # Only if new checker process was started
1367
 
        if (self.checker is not None
1368
 
            and old_checker_pid != self.checker.pid):
1369
 
            # Emit D-Bus signal
1370
 
            self.CheckerStarted(self.current_checker_command)
1371
 
        return r
1372
 
    
1373
 
    def _reset_approved(self):
1374
 
        self.approved = None
1375
 
        return False
1376
 
    
1377
 
    def approve(self, value=True):
1378
 
        self.approved = value
1379
 
        gobject.timeout_add(int(self.approval_duration.total_seconds()
1380
 
                                * 1000), self._reset_approved)
1381
 
        self.send_changedstate()
1382
 
    
1383
 
    ## D-Bus methods, signals & properties
1384
 
    
1385
 
    ## Interfaces
1386
 
    
1387
 
    ## Signals
1388
 
    
1389
 
    # CheckerCompleted - signal
1390
 
    @dbus.service.signal(_interface, signature="nxs")
1391
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1392
 
        "D-Bus signal"
1393
 
        pass
1394
 
    
1395
 
    # CheckerStarted - signal
1396
 
    @dbus.service.signal(_interface, signature="s")
1397
 
    def CheckerStarted(self, command):
1398
 
        "D-Bus signal"
1399
 
        pass
1400
 
    
1401
 
    # PropertyChanged - signal
1402
 
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1403
 
    @dbus.service.signal(_interface, signature="sv")
1404
 
    def PropertyChanged(self, property, value):
1405
 
        "D-Bus signal"
1406
 
        pass
1407
 
    
1408
 
    # GotSecret - signal
1409
 
    @dbus.service.signal(_interface)
1410
 
    def GotSecret(self):
1411
 
        """D-Bus signal
1412
 
        Is sent after a successful transfer of secret from the Mandos
1413
 
        server to mandos-client
1414
 
        """
1415
 
        pass
1416
 
    
1417
 
    # Rejected - signal
1418
 
    @dbus.service.signal(_interface, signature="s")
1419
 
    def Rejected(self, reason):
1420
 
        "D-Bus signal"
1421
 
        pass
1422
 
    
1423
 
    # NeedApproval - signal
1424
 
    @dbus.service.signal(_interface, signature="tb")
1425
 
    def NeedApproval(self, timeout, default):
1426
 
        "D-Bus signal"
1427
 
        return self.need_approval()
1428
 
    
1429
 
    ## Methods
1430
 
    
1431
 
    # Approve - method
1432
 
    @dbus.service.method(_interface, in_signature="b")
1433
 
    def Approve(self, value):
1434
 
        self.approve(value)
1435
 
    
1436
 
    # CheckedOK - method
1437
 
    @dbus.service.method(_interface)
1438
 
    def CheckedOK(self):
1439
 
        self.checked_ok()
1440
 
    
1441
 
    # Enable - method
1442
 
    @dbus.service.method(_interface)
1443
 
    def Enable(self):
1444
 
        "D-Bus method"
1445
 
        self.enable()
1446
 
    
1447
 
    # StartChecker - method
1448
 
    @dbus.service.method(_interface)
1449
 
    def StartChecker(self):
1450
 
        "D-Bus method"
1451
 
        self.start_checker()
1452
 
    
1453
 
    # Disable - method
1454
 
    @dbus.service.method(_interface)
1455
 
    def Disable(self):
1456
 
        "D-Bus method"
1457
 
        self.disable()
1458
 
    
1459
 
    # StopChecker - method
1460
 
    @dbus.service.method(_interface)
1461
 
    def StopChecker(self):
1462
 
        self.stop_checker()
1463
 
    
1464
 
    ## Properties
1465
 
    
1466
 
    # ApprovalPending - property
1467
 
    @dbus_service_property(_interface, signature="b", access="read")
1468
 
    def ApprovalPending_dbus_property(self):
1469
 
        return dbus.Boolean(bool(self.approvals_pending))
1470
 
    
1471
 
    # ApprovedByDefault - property
1472
 
    @dbus_service_property(_interface, signature="b",
1473
 
                           access="readwrite")
1474
 
    def ApprovedByDefault_dbus_property(self, value=None):
1475
 
        if value is None:       # get
1476
 
            return dbus.Boolean(self.approved_by_default)
1477
 
        self.approved_by_default = bool(value)
1478
 
    
1479
 
    # ApprovalDelay - property
1480
 
    @dbus_service_property(_interface, signature="t",
1481
 
                           access="readwrite")
1482
 
    def ApprovalDelay_dbus_property(self, value=None):
1483
 
        if value is None:       # get
1484
 
            return dbus.UInt64(self.approval_delay.total_seconds()
1485
 
                               * 1000)
1486
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1487
 
    
1488
 
    # ApprovalDuration - property
1489
 
    @dbus_service_property(_interface, signature="t",
1490
 
                           access="readwrite")
1491
 
    def ApprovalDuration_dbus_property(self, value=None):
1492
 
        if value is None:       # get
1493
 
            return dbus.UInt64(self.approval_duration.total_seconds()
1494
 
                               * 1000)
1495
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1496
 
    
1497
 
    # Name - property
1498
 
    @dbus_service_property(_interface, signature="s", access="read")
1499
 
    def Name_dbus_property(self):
1500
 
        return dbus.String(self.name)
1501
 
    
1502
 
    # Fingerprint - property
1503
 
    @dbus_service_property(_interface, signature="s", access="read")
1504
 
    def Fingerprint_dbus_property(self):
1505
 
        return dbus.String(self.fingerprint)
1506
 
    
1507
 
    # Host - property
1508
 
    @dbus_service_property(_interface, signature="s",
1509
 
                           access="readwrite")
1510
 
    def Host_dbus_property(self, value=None):
1511
 
        if value is None:       # get
1512
 
            return dbus.String(self.host)
1513
 
        self.host = str(value)
1514
 
    
1515
 
    # Created - property
1516
 
    @dbus_service_property(_interface, signature="s", access="read")
1517
 
    def Created_dbus_property(self):
1518
 
        return datetime_to_dbus(self.created)
1519
 
    
1520
 
    # LastEnabled - property
1521
 
    @dbus_service_property(_interface, signature="s", access="read")
1522
 
    def LastEnabled_dbus_property(self):
1523
 
        return datetime_to_dbus(self.last_enabled)
1524
 
    
1525
 
    # Enabled - property
1526
 
    @dbus_service_property(_interface, signature="b",
1527
 
                           access="readwrite")
1528
 
    def Enabled_dbus_property(self, value=None):
1529
 
        if value is None:       # get
1530
 
            return dbus.Boolean(self.enabled)
1531
 
        if value:
1532
 
            self.enable()
1533
 
        else:
1534
 
            self.disable()
1535
 
    
1536
 
    # LastCheckedOK - property
1537
 
    @dbus_service_property(_interface, signature="s",
1538
 
                           access="readwrite")
1539
 
    def LastCheckedOK_dbus_property(self, value=None):
1540
 
        if value is not None:
1541
 
            self.checked_ok()
1542
 
            return
1543
 
        return datetime_to_dbus(self.last_checked_ok)
1544
 
    
1545
 
    # LastCheckerStatus - property
1546
 
    @dbus_service_property(_interface, signature="n",
1547
 
                           access="read")
1548
 
    def LastCheckerStatus_dbus_property(self):
1549
 
        return dbus.Int16(self.last_checker_status)
1550
 
    
1551
 
    # Expires - property
1552
 
    @dbus_service_property(_interface, signature="s", access="read")
1553
 
    def Expires_dbus_property(self):
1554
 
        return datetime_to_dbus(self.expires)
1555
 
    
1556
 
    # LastApprovalRequest - property
1557
 
    @dbus_service_property(_interface, signature="s", access="read")
1558
 
    def LastApprovalRequest_dbus_property(self):
1559
 
        return datetime_to_dbus(self.last_approval_request)
1560
 
    
1561
 
    # Timeout - property
1562
 
    @dbus_service_property(_interface, signature="t",
1563
 
                           access="readwrite")
1564
 
    def Timeout_dbus_property(self, value=None):
1565
 
        if value is None:       # get
1566
 
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
1567
 
        old_timeout = self.timeout
1568
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1569
 
        # Reschedule disabling
1570
 
        if self.enabled:
1571
 
            now = datetime.datetime.utcnow()
1572
 
            self.expires += self.timeout - old_timeout
1573
 
            if self.expires <= now:
1574
 
                # The timeout has passed
1575
 
                self.disable()
1576
 
            else:
1577
 
                if (getattr(self, "disable_initiator_tag", None)
1578
 
                    is None):
1579
 
                    return
1580
 
                gobject.source_remove(self.disable_initiator_tag)
1581
 
                self.disable_initiator_tag = (
1582
 
                    gobject.timeout_add(
1583
 
                        int((self.expires - now).total_seconds()
1584
 
                            * 1000), self.disable))
1585
 
    
1586
 
    # ExtendedTimeout - property
1587
 
    @dbus_service_property(_interface, signature="t",
1588
 
                           access="readwrite")
1589
 
    def ExtendedTimeout_dbus_property(self, value=None):
1590
 
        if value is None:       # get
1591
 
            return dbus.UInt64(self.extended_timeout.total_seconds()
1592
 
                               * 1000)
1593
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1594
 
    
1595
 
    # Interval - property
1596
 
    @dbus_service_property(_interface, signature="t",
1597
 
                           access="readwrite")
1598
 
    def Interval_dbus_property(self, value=None):
1599
 
        if value is None:       # get
1600
 
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1601
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1602
 
        if getattr(self, "checker_initiator_tag", None) is None:
1603
 
            return
1604
 
        if self.enabled:
1605
 
            # Reschedule checker run
1606
 
            gobject.source_remove(self.checker_initiator_tag)
1607
 
            self.checker_initiator_tag = (gobject.timeout_add
1608
 
                                          (value, self.start_checker))
1609
 
            self.start_checker()    # Start one now, too
1610
 
    
1611
 
    # Checker - property
1612
 
    @dbus_service_property(_interface, signature="s",
1613
 
                           access="readwrite")
1614
 
    def Checker_dbus_property(self, value=None):
1615
 
        if value is None:       # get
1616
 
            return dbus.String(self.checker_command)
1617
 
        self.checker_command = str(value)
1618
 
    
1619
 
    # CheckerRunning - property
1620
 
    @dbus_service_property(_interface, signature="b",
1621
 
                           access="readwrite")
1622
 
    def CheckerRunning_dbus_property(self, value=None):
1623
 
        if value is None:       # get
1624
 
            return dbus.Boolean(self.checker is not None)
1625
 
        if value:
1626
 
            self.start_checker()
1627
 
        else:
1628
 
            self.stop_checker()
1629
 
    
1630
 
    # ObjectPath - property
1631
 
    @dbus_service_property(_interface, signature="o", access="read")
1632
 
    def ObjectPath_dbus_property(self):
1633
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1634
 
    
1635
 
    # Secret = property
1636
 
    @dbus_service_property(_interface, signature="ay",
1637
 
                           access="write", byte_arrays=True)
1638
 
    def Secret_dbus_property(self, value):
1639
 
        self.secret = bytes(value)
1640
 
    
1641
 
    del _interface
1642
 
 
1643
 
 
1644
 
class ProxyClient(object):
1645
 
    def __init__(self, child_pipe, fpr, address):
1646
 
        self._pipe = child_pipe
1647
 
        self._pipe.send(('init', fpr, address))
1648
 
        if not self._pipe.recv():
1649
 
            raise KeyError()
1650
 
    
1651
 
    def __getattribute__(self, name):
1652
 
        if name == '_pipe':
1653
 
            return super(ProxyClient, self).__getattribute__(name)
1654
 
        self._pipe.send(('getattr', name))
1655
 
        data = self._pipe.recv()
1656
 
        if data[0] == 'data':
1657
 
            return data[1]
1658
 
        if data[0] == 'function':
1659
 
            def func(*args, **kwargs):
1660
 
                self._pipe.send(('funcall', name, args, kwargs))
1661
 
                return self._pipe.recv()[1]
1662
 
            return func
1663
 
    
1664
 
    def __setattr__(self, name, value):
1665
 
        if name == '_pipe':
1666
 
            return super(ProxyClient, self).__setattr__(name, value)
1667
 
        self._pipe.send(('setattr', name, value))
1668
 
 
1669
 
 
1670
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1671
 
    """A class to handle client connections.
1672
 
    
1673
 
    Instantiated once for each connection to handle it.
 
379
    def still_valid(self):
 
380
        """Has the timeout not yet passed for this client?"""
 
381
        now = datetime.datetime.now()
 
382
        if self.last_checked_ok is None:
 
383
            return now < (self.created + self.timeout)
 
384
        else:
 
385
            return now < (self.last_checked_ok + self.timeout)
 
386
 
 
387
 
 
388
def peer_certificate(session):
 
389
    "Return the peer's OpenPGP certificate as a bytestring"
 
390
    # If not an OpenPGP certificate...
 
391
    if gnutls.library.functions.gnutls_certificate_type_get\
 
392
            (session._c_object) \
 
393
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
394
        # ...do the normal thing
 
395
        return session.peer_certificate
 
396
    list_size = ctypes.c_uint()
 
397
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
398
        (session._c_object, ctypes.byref(list_size))
 
399
    if list_size.value == 0:
 
400
        return None
 
401
    cert = cert_list[0]
 
402
    return ctypes.string_at(cert.data, cert.size)
 
403
 
 
404
 
 
405
def fingerprint(openpgp):
 
406
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
407
    # New GnuTLS "datum" with the OpenPGP public key
 
408
    datum = gnutls.library.types.gnutls_datum_t\
 
409
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
410
                     ctypes.POINTER(ctypes.c_ubyte)),
 
411
         ctypes.c_uint(len(openpgp)))
 
412
    # New empty GnuTLS certificate
 
413
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
414
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
415
        (ctypes.byref(crt))
 
416
    # Import the OpenPGP public key into the certificate
 
417
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
418
                    (crt, ctypes.byref(datum),
 
419
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
420
    # Verify the self signature in the key
 
421
    crtverify = ctypes.c_uint()
 
422
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
423
        (crt, 0, ctypes.byref(crtverify))
 
424
    if crtverify.value != 0:
 
425
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
426
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
427
    # New buffer for the fingerprint
 
428
    buf = ctypes.create_string_buffer(20)
 
429
    buf_len = ctypes.c_size_t()
 
430
    # Get the fingerprint from the certificate into the buffer
 
431
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
432
        (crt, ctypes.byref(buf), ctypes.byref(buf_len))
 
433
    # Deinit the certificate
 
434
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
435
    # Convert the buffer to a Python bytestring
 
436
    fpr = ctypes.string_at(buf, buf_len.value)
 
437
    # Convert the bytestring to hexadecimal notation
 
438
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
439
    return hex_fpr
 
440
 
 
441
 
 
442
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
443
    """A TCP request handler class.
 
444
    Instantiated by IPv6_TCPServer for each request to handle it.
1674
445
    Note: This will run in its own forked process."""
1675
446
    
1676
447
    def handle(self):
1677
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1678
 
            logger.info("TCP connection from: %s",
1679
 
                        str(self.client_address))
1680
 
            logger.debug("Pipe FD: %d",
1681
 
                         self.server.child_pipe.fileno())
1682
 
            
1683
 
            session = (gnutls.connection
1684
 
                       .ClientSession(self.request,
1685
 
                                      gnutls.connection
1686
 
                                      .X509Credentials()))
1687
 
            
1688
 
            # Note: gnutls.connection.X509Credentials is really a
1689
 
            # generic GnuTLS certificate credentials object so long as
1690
 
            # no X.509 keys are added to it.  Therefore, we can use it
1691
 
            # here despite using OpenPGP certificates.
1692
 
            
1693
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1694
 
            #                      "+AES-256-CBC", "+SHA1",
1695
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1696
 
            #                      "+DHE-DSS"))
1697
 
            # Use a fallback default, since this MUST be set.
1698
 
            priority = self.server.gnutls_priority
1699
 
            if priority is None:
1700
 
                priority = "NORMAL"
1701
 
            (gnutls.library.functions
1702
 
             .gnutls_priority_set_direct(session._c_object,
1703
 
                                         priority, None))
1704
 
            
1705
 
            # Start communication using the Mandos protocol
1706
 
            # Get protocol number
1707
 
            line = self.request.makefile().readline()
1708
 
            logger.debug("Protocol version: %r", line)
1709
 
            try:
1710
 
                if int(line.strip().split()[0]) > 1:
1711
 
                    raise RuntimeError(line)
1712
 
            except (ValueError, IndexError, RuntimeError) as error:
1713
 
                logger.error("Unknown protocol version: %s", error)
1714
 
                return
1715
 
            
1716
 
            # Start GnuTLS connection
1717
 
            try:
1718
 
                session.handshake()
1719
 
            except gnutls.errors.GNUTLSError as error:
1720
 
                logger.warning("Handshake failed: %s", error)
1721
 
                # Do not run session.bye() here: the session is not
1722
 
                # established.  Just abandon the request.
1723
 
                return
1724
 
            logger.debug("Handshake succeeded")
1725
 
            
1726
 
            approval_required = False
1727
 
            try:
1728
 
                try:
1729
 
                    fpr = self.fingerprint(self.peer_certificate
1730
 
                                           (session))
1731
 
                except (TypeError,
1732
 
                        gnutls.errors.GNUTLSError) as error:
1733
 
                    logger.warning("Bad certificate: %s", error)
1734
 
                    return
1735
 
                logger.debug("Fingerprint: %s", fpr)
1736
 
                
1737
 
                try:
1738
 
                    client = ProxyClient(child_pipe, fpr,
1739
 
                                         self.client_address)
1740
 
                except KeyError:
1741
 
                    return
1742
 
                
1743
 
                if client.approval_delay:
1744
 
                    delay = client.approval_delay
1745
 
                    client.approvals_pending += 1
1746
 
                    approval_required = True
1747
 
                
1748
 
                while True:
1749
 
                    if not client.enabled:
1750
 
                        logger.info("Client %s is disabled",
1751
 
                                       client.name)
1752
 
                        if self.server.use_dbus:
1753
 
                            # Emit D-Bus signal
1754
 
                            client.Rejected("Disabled")
1755
 
                        return
1756
 
                    
1757
 
                    if client.approved or not client.approval_delay:
1758
 
                        #We are approved or approval is disabled
1759
 
                        break
1760
 
                    elif client.approved is None:
1761
 
                        logger.info("Client %s needs approval",
1762
 
                                    client.name)
1763
 
                        if self.server.use_dbus:
1764
 
                            # Emit D-Bus signal
1765
 
                            client.NeedApproval(
1766
 
                                client.approval_delay.total_seconds()
1767
 
                                * 1000, client.approved_by_default)
1768
 
                    else:
1769
 
                        logger.warning("Client %s was not approved",
1770
 
                                       client.name)
1771
 
                        if self.server.use_dbus:
1772
 
                            # Emit D-Bus signal
1773
 
                            client.Rejected("Denied")
1774
 
                        return
1775
 
                    
1776
 
                    #wait until timeout or approved
1777
 
                    time = datetime.datetime.now()
1778
 
                    client.changedstate.acquire()
1779
 
                    client.changedstate.wait(delay.total_seconds())
1780
 
                    client.changedstate.release()
1781
 
                    time2 = datetime.datetime.now()
1782
 
                    if (time2 - time) >= delay:
1783
 
                        if not client.approved_by_default:
1784
 
                            logger.warning("Client %s timed out while"
1785
 
                                           " waiting for approval",
1786
 
                                           client.name)
1787
 
                            if self.server.use_dbus:
1788
 
                                # Emit D-Bus signal
1789
 
                                client.Rejected("Approval timed out")
1790
 
                            return
1791
 
                        else:
1792
 
                            break
1793
 
                    else:
1794
 
                        delay -= time2 - time
1795
 
                
1796
 
                sent_size = 0
1797
 
                while sent_size < len(client.secret):
1798
 
                    try:
1799
 
                        sent = session.send(client.secret[sent_size:])
1800
 
                    except gnutls.errors.GNUTLSError as error:
1801
 
                        logger.warning("gnutls send failed",
1802
 
                                       exc_info=error)
1803
 
                        return
1804
 
                    logger.debug("Sent: %d, remaining: %d",
1805
 
                                 sent, len(client.secret)
1806
 
                                 - (sent_size + sent))
1807
 
                    sent_size += sent
1808
 
                
1809
 
                logger.info("Sending secret to %s", client.name)
1810
 
                # bump the timeout using extended_timeout
1811
 
                client.bump_timeout(client.extended_timeout)
1812
 
                if self.server.use_dbus:
1813
 
                    # Emit D-Bus signal
1814
 
                    client.GotSecret()
1815
 
            
1816
 
            finally:
1817
 
                if approval_required:
1818
 
                    client.approvals_pending -= 1
1819
 
                try:
1820
 
                    session.bye()
1821
 
                except gnutls.errors.GNUTLSError as error:
1822
 
                    logger.warning("GnuTLS bye failed",
1823
 
                                   exc_info=error)
1824
 
    
1825
 
    @staticmethod
1826
 
    def peer_certificate(session):
1827
 
        "Return the peer's OpenPGP certificate as a bytestring"
1828
 
        # If not an OpenPGP certificate...
1829
 
        if (gnutls.library.functions
1830
 
            .gnutls_certificate_type_get(session._c_object)
1831
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1832
 
            # ...do the normal thing
1833
 
            return session.peer_certificate
1834
 
        list_size = ctypes.c_uint(1)
1835
 
        cert_list = (gnutls.library.functions
1836
 
                     .gnutls_certificate_get_peers
1837
 
                     (session._c_object, ctypes.byref(list_size)))
1838
 
        if not bool(cert_list) and list_size.value != 0:
1839
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1840
 
                                            " certificate")
1841
 
        if list_size.value == 0:
1842
 
            return None
1843
 
        cert = cert_list[0]
1844
 
        return ctypes.string_at(cert.data, cert.size)
1845
 
    
1846
 
    @staticmethod
1847
 
    def fingerprint(openpgp):
1848
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1849
 
        # New GnuTLS "datum" with the OpenPGP public key
1850
 
        datum = (gnutls.library.types
1851
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1852
 
                                             ctypes.POINTER
1853
 
                                             (ctypes.c_ubyte)),
1854
 
                                 ctypes.c_uint(len(openpgp))))
1855
 
        # New empty GnuTLS certificate
1856
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1857
 
        (gnutls.library.functions
1858
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1859
 
        # Import the OpenPGP public key into the certificate
1860
 
        (gnutls.library.functions
1861
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1862
 
                                    gnutls.library.constants
1863
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1864
 
        # Verify the self signature in the key
1865
 
        crtverify = ctypes.c_uint()
1866
 
        (gnutls.library.functions
1867
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1868
 
                                         ctypes.byref(crtverify)))
1869
 
        if crtverify.value != 0:
1870
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1871
 
            raise (gnutls.errors.CertificateSecurityError
1872
 
                   ("Verify failed"))
1873
 
        # New buffer for the fingerprint
1874
 
        buf = ctypes.create_string_buffer(20)
1875
 
        buf_len = ctypes.c_size_t()
1876
 
        # Get the fingerprint from the certificate into the buffer
1877
 
        (gnutls.library.functions
1878
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1879
 
                                             ctypes.byref(buf_len)))
1880
 
        # Deinit the certificate
1881
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1882
 
        # Convert the buffer to a Python bytestring
1883
 
        fpr = ctypes.string_at(buf, buf_len.value)
1884
 
        # Convert the bytestring to hexadecimal notation
1885
 
        hex_fpr = binascii.hexlify(fpr).upper()
1886
 
        return hex_fpr
1887
 
 
1888
 
 
1889
 
class MultiprocessingMixIn(object):
1890
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1891
 
    def sub_process_main(self, request, address):
1892
 
        try:
1893
 
            self.finish_request(request, address)
1894
 
        except Exception:
1895
 
            self.handle_error(request, address)
1896
 
        self.close_request(request)
1897
 
    
1898
 
    def process_request(self, request, address):
1899
 
        """Start a new process to process the request."""
1900
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1901
 
                                       args = (request, address))
1902
 
        proc.start()
1903
 
        return proc
1904
 
 
1905
 
 
1906
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1907
 
    """ adds a pipe to the MixIn """
1908
 
    def process_request(self, request, client_address):
1909
 
        """Overrides and wraps the original process_request().
1910
 
        
1911
 
        This function creates a new pipe in self.pipe
1912
 
        """
1913
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1914
 
        
1915
 
        proc = MultiprocessingMixIn.process_request(self, request,
1916
 
                                                    client_address)
1917
 
        self.child_pipe.close()
1918
 
        self.add_pipe(parent_pipe, proc)
1919
 
    
1920
 
    def add_pipe(self, parent_pipe, proc):
1921
 
        """Dummy function; override as necessary"""
1922
 
        raise NotImplementedError()
1923
 
 
1924
 
 
1925
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1926
 
                     socketserver.TCPServer, object):
1927
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1928
 
    
 
448
        logger.info(u"TCP connection from: %s",
 
449
                     unicode(self.client_address))
 
450
        session = gnutls.connection.ClientSession\
 
451
                  (self.request, gnutls.connection.X509Credentials())
 
452
        
 
453
        line = self.request.makefile().readline()
 
454
        logger.debug(u"Protocol version: %r", line)
 
455
        try:
 
456
            if int(line.strip().split()[0]) > 1:
 
457
                raise RuntimeError
 
458
        except (ValueError, IndexError, RuntimeError), error:
 
459
            logger.error(u"Unknown protocol version: %s", error)
 
460
            return
 
461
        
 
462
        # Note: gnutls.connection.X509Credentials is really a generic
 
463
        # GnuTLS certificate credentials object so long as no X.509
 
464
        # keys are added to it.  Therefore, we can use it here despite
 
465
        # using OpenPGP certificates.
 
466
        
 
467
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
468
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
469
        #                "+DHE-DSS"))
 
470
        priority = "NORMAL"             # Fallback default, since this
 
471
                                        # MUST be set.
 
472
        if self.server.settings["priority"]:
 
473
            priority = self.server.settings["priority"]
 
474
        gnutls.library.functions.gnutls_priority_set_direct\
 
475
            (session._c_object, priority, None)
 
476
        
 
477
        try:
 
478
            session.handshake()
 
479
        except gnutls.errors.GNUTLSError, error:
 
480
            logger.warning(u"Handshake failed: %s", error)
 
481
            # Do not run session.bye() here: the session is not
 
482
            # established.  Just abandon the request.
 
483
            return
 
484
        try:
 
485
            fpr = fingerprint(peer_certificate(session))
 
486
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
487
            logger.warning(u"Bad certificate: %s", error)
 
488
            session.bye()
 
489
            return
 
490
        logger.debug(u"Fingerprint: %s", fpr)
 
491
        client = None
 
492
        for c in self.server.clients:
 
493
            if c.fingerprint == fpr:
 
494
                client = c
 
495
                break
 
496
        if not client:
 
497
            logger.warning(u"Client not found for fingerprint: %s",
 
498
                           fpr)
 
499
            session.bye()
 
500
            return
 
501
        # Have to check if client.still_valid(), since it is possible
 
502
        # that the client timed out while establishing the GnuTLS
 
503
        # session.
 
504
        if not client.still_valid():
 
505
            logger.warning(u"Client %(name)s is invalid",
 
506
                           vars(client))
 
507
            session.bye()
 
508
            return
 
509
        sent_size = 0
 
510
        while sent_size < len(client.secret):
 
511
            sent = session.send(client.secret[sent_size:])
 
512
            logger.debug(u"Sent: %d, remaining: %d",
 
513
                         sent, len(client.secret)
 
514
                         - (sent_size + sent))
 
515
            sent_size += sent
 
516
        session.bye()
 
517
 
 
518
 
 
519
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
520
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1929
521
    Attributes:
 
522
        settings:       Server settings
 
523
        clients:        Set() of Client objects
1930
524
        enabled:        Boolean; whether this server is activated yet
1931
 
        interface:      None or a network interface name (string)
1932
 
        use_ipv6:       Boolean; to use IPv6 or not
1933
525
    """
1934
 
    def __init__(self, server_address, RequestHandlerClass,
1935
 
                 interface=None, use_ipv6=True, socketfd=None):
1936
 
        """If socketfd is set, use that file descriptor instead of
1937
 
        creating a new one with socket.socket().
1938
 
        """
1939
 
        self.interface = interface
1940
 
        if use_ipv6:
1941
 
            self.address_family = socket.AF_INET6
1942
 
        if socketfd is not None:
1943
 
            # Save the file descriptor
1944
 
            self.socketfd = socketfd
1945
 
            # Save the original socket.socket() function
1946
 
            self.socket_socket = socket.socket
1947
 
            # To implement --socket, we monkey patch socket.socket.
1948
 
            # 
1949
 
            # (When socketserver.TCPServer is a new-style class, we
1950
 
            # could make self.socket into a property instead of monkey
1951
 
            # patching socket.socket.)
1952
 
            # 
1953
 
            # Create a one-time-only replacement for socket.socket()
1954
 
            @functools.wraps(socket.socket)
1955
 
            def socket_wrapper(*args, **kwargs):
1956
 
                # Restore original function so subsequent calls are
1957
 
                # not affected.
1958
 
                socket.socket = self.socket_socket
1959
 
                del self.socket_socket
1960
 
                # This time only, return a new socket object from the
1961
 
                # saved file descriptor.
1962
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1963
 
            # Replace socket.socket() function with wrapper
1964
 
            socket.socket = socket_wrapper
1965
 
        # The socketserver.TCPServer.__init__ will call
1966
 
        # socket.socket(), which might be our replacement,
1967
 
        # socket_wrapper(), if socketfd was set.
1968
 
        socketserver.TCPServer.__init__(self, server_address,
1969
 
                                        RequestHandlerClass)
1970
 
    
 
526
    address_family = socket.AF_INET6
 
527
    def __init__(self, *args, **kwargs):
 
528
        if "settings" in kwargs:
 
529
            self.settings = kwargs["settings"]
 
530
            del kwargs["settings"]
 
531
        if "clients" in kwargs:
 
532
            self.clients = kwargs["clients"]
 
533
            del kwargs["clients"]
 
534
        self.enabled = False
 
535
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1971
536
    def server_bind(self):
1972
537
        """This overrides the normal server_bind() function
1973
538
        to bind to an interface if one was specified, and also NOT to
1974
539
        bind to an address or port if they were not specified."""
1975
 
        if self.interface is not None:
1976
 
            if SO_BINDTODEVICE is None:
1977
 
                logger.error("SO_BINDTODEVICE does not exist;"
1978
 
                             " cannot bind to interface %s",
1979
 
                             self.interface)
1980
 
            else:
1981
 
                try:
1982
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1983
 
                                           SO_BINDTODEVICE,
1984
 
                                           (self.interface + "\0")
1985
 
                                           .encode("utf-8"))
1986
 
                except socket.error as error:
1987
 
                    if error.errno == errno.EPERM:
1988
 
                        logger.error("No permission to bind to"
1989
 
                                     " interface %s", self.interface)
1990
 
                    elif error.errno == errno.ENOPROTOOPT:
1991
 
                        logger.error("SO_BINDTODEVICE not available;"
1992
 
                                     " cannot bind to interface %s",
1993
 
                                     self.interface)
1994
 
                    elif error.errno == errno.ENODEV:
1995
 
                        logger.error("Interface %s does not exist,"
1996
 
                                     " cannot bind", self.interface)
1997
 
                    else:
1998
 
                        raise
 
540
        if self.settings["interface"]:
 
541
            # 25 is from /usr/include/asm-i486/socket.h
 
542
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
543
            try:
 
544
                self.socket.setsockopt(socket.SOL_SOCKET,
 
545
                                       SO_BINDTODEVICE,
 
546
                                       self.settings["interface"])
 
547
            except socket.error, error:
 
548
                if error[0] == errno.EPERM:
 
549
                    logger.error(u"No permission to"
 
550
                                 u" bind to interface %s",
 
551
                                 self.settings["interface"])
 
552
                else:
 
553
                    raise error
1999
554
        # Only bind(2) the socket if we really need to.
2000
555
        if self.server_address[0] or self.server_address[1]:
2001
556
            if not self.server_address[0]:
2002
 
                if self.address_family == socket.AF_INET6:
2003
 
                    any_address = "::" # in6addr_any
2004
 
                else:
2005
 
                    any_address = "0.0.0.0" # INADDR_ANY
2006
 
                self.server_address = (any_address,
 
557
                in6addr_any = "::"
 
558
                self.server_address = (in6addr_any,
2007
559
                                       self.server_address[1])
2008
560
            elif not self.server_address[1]:
2009
561
                self.server_address = (self.server_address[0],
2010
562
                                       0)
2011
 
#                 if self.interface:
 
563
#                 if self.settings["interface"]:
2012
564
#                     self.server_address = (self.server_address[0],
2013
565
#                                            0, # port
2014
566
#                                            0, # flowinfo
2015
567
#                                            if_nametoindex
2016
 
#                                            (self.interface))
2017
 
            return socketserver.TCPServer.server_bind(self)
2018
 
 
2019
 
 
2020
 
class MandosServer(IPv6_TCPServer):
2021
 
    """Mandos server.
2022
 
    
2023
 
    Attributes:
2024
 
        clients:        set of Client objects
2025
 
        gnutls_priority GnuTLS priority string
2026
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2027
 
    
2028
 
    Assumes a gobject.MainLoop event loop.
2029
 
    """
2030
 
    def __init__(self, server_address, RequestHandlerClass,
2031
 
                 interface=None, use_ipv6=True, clients=None,
2032
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
2033
 
        self.enabled = False
2034
 
        self.clients = clients
2035
 
        if self.clients is None:
2036
 
            self.clients = {}
2037
 
        self.use_dbus = use_dbus
2038
 
        self.gnutls_priority = gnutls_priority
2039
 
        IPv6_TCPServer.__init__(self, server_address,
2040
 
                                RequestHandlerClass,
2041
 
                                interface = interface,
2042
 
                                use_ipv6 = use_ipv6,
2043
 
                                socketfd = socketfd)
 
568
#                                            (self.settings
 
569
#                                             ["interface"]))
 
570
            return super(IPv6_TCPServer, self).server_bind()
2044
571
    def server_activate(self):
2045
572
        if self.enabled:
2046
 
            return socketserver.TCPServer.server_activate(self)
2047
 
    
 
573
            return super(IPv6_TCPServer, self).server_activate()
2048
574
    def enable(self):
2049
575
        self.enabled = True
2050
 
    
2051
 
    def add_pipe(self, parent_pipe, proc):
2052
 
        # Call "handle_ipc" for both data and EOF events
2053
 
        gobject.io_add_watch(parent_pipe.fileno(),
2054
 
                             gobject.IO_IN | gobject.IO_HUP,
2055
 
                             functools.partial(self.handle_ipc,
2056
 
                                               parent_pipe =
2057
 
                                               parent_pipe,
2058
 
                                               proc = proc))
2059
 
    
2060
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2061
 
                   proc = None, client_object=None):
2062
 
        # error, or the other end of multiprocessing.Pipe has closed
2063
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2064
 
            # Wait for other process to exit
2065
 
            proc.join()
2066
 
            return False
2067
 
        
2068
 
        # Read a request from the child
2069
 
        request = parent_pipe.recv()
2070
 
        command = request[0]
2071
 
        
2072
 
        if command == 'init':
2073
 
            fpr = request[1]
2074
 
            address = request[2]
2075
 
            
2076
 
            for c in self.clients.itervalues():
2077
 
                if c.fingerprint == fpr:
2078
 
                    client = c
2079
 
                    break
2080
 
            else:
2081
 
                logger.info("Client not found for fingerprint: %s, ad"
2082
 
                            "dress: %s", fpr, address)
2083
 
                if self.use_dbus:
2084
 
                    # Emit D-Bus signal
2085
 
                    mandos_dbus_service.ClientNotFound(fpr,
2086
 
                                                       address[0])
2087
 
                parent_pipe.send(False)
2088
 
                return False
2089
 
            
2090
 
            gobject.io_add_watch(parent_pipe.fileno(),
2091
 
                                 gobject.IO_IN | gobject.IO_HUP,
2092
 
                                 functools.partial(self.handle_ipc,
2093
 
                                                   parent_pipe =
2094
 
                                                   parent_pipe,
2095
 
                                                   proc = proc,
2096
 
                                                   client_object =
2097
 
                                                   client))
2098
 
            parent_pipe.send(True)
2099
 
            # remove the old hook in favor of the new above hook on
2100
 
            # same fileno
2101
 
            return False
2102
 
        if command == 'funcall':
2103
 
            funcname = request[1]
2104
 
            args = request[2]
2105
 
            kwargs = request[3]
2106
 
            
2107
 
            parent_pipe.send(('data', getattr(client_object,
2108
 
                                              funcname)(*args,
2109
 
                                                         **kwargs)))
2110
 
        
2111
 
        if command == 'getattr':
2112
 
            attrname = request[1]
2113
 
            if callable(client_object.__getattribute__(attrname)):
2114
 
                parent_pipe.send(('function',))
2115
 
            else:
2116
 
                parent_pipe.send(('data', client_object
2117
 
                                  .__getattribute__(attrname)))
2118
 
        
2119
 
        if command == 'setattr':
2120
 
            attrname = request[1]
2121
 
            value = request[2]
2122
 
            setattr(client_object, attrname, value)
2123
 
        
2124
 
        return True
2125
 
 
2126
 
 
2127
 
def rfc3339_duration_to_delta(duration):
2128
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2129
 
    
2130
 
    >>> rfc3339_duration_to_delta("P7D")
2131
 
    datetime.timedelta(7)
2132
 
    >>> rfc3339_duration_to_delta("PT60S")
2133
 
    datetime.timedelta(0, 60)
2134
 
    >>> rfc3339_duration_to_delta("PT60M")
2135
 
    datetime.timedelta(0, 3600)
2136
 
    >>> rfc3339_duration_to_delta("PT24H")
2137
 
    datetime.timedelta(1)
2138
 
    >>> rfc3339_duration_to_delta("P1W")
2139
 
    datetime.timedelta(7)
2140
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2141
 
    datetime.timedelta(0, 330)
2142
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2143
 
    datetime.timedelta(1, 200)
2144
 
    """
2145
 
    
2146
 
    # Parsing an RFC 3339 duration with regular expressions is not
2147
 
    # possible - there would have to be multiple places for the same
2148
 
    # values, like seconds.  The current code, while more esoteric, is
2149
 
    # cleaner without depending on a parsing library.  If Python had a
2150
 
    # built-in library for parsing we would use it, but we'd like to
2151
 
    # avoid excessive use of external libraries.
2152
 
    
2153
 
    # New type for defining tokens, syntax, and semantics all-in-one
2154
 
    Token = collections.namedtuple("Token",
2155
 
                                   ("regexp", # To match token; if
2156
 
                                              # "value" is not None,
2157
 
                                              # must have a "group"
2158
 
                                              # containing digits
2159
 
                                    "value",  # datetime.timedelta or
2160
 
                                              # None
2161
 
                                    "followers")) # Tokens valid after
2162
 
                                                  # this token
2163
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2164
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2165
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2166
 
    token_second = Token(re.compile(r"(\d+)S"),
2167
 
                         datetime.timedelta(seconds=1),
2168
 
                         frozenset((token_end,)))
2169
 
    token_minute = Token(re.compile(r"(\d+)M"),
2170
 
                         datetime.timedelta(minutes=1),
2171
 
                         frozenset((token_second, token_end)))
2172
 
    token_hour = Token(re.compile(r"(\d+)H"),
2173
 
                       datetime.timedelta(hours=1),
2174
 
                       frozenset((token_minute, token_end)))
2175
 
    token_time = Token(re.compile(r"T"),
2176
 
                       None,
2177
 
                       frozenset((token_hour, token_minute,
2178
 
                                  token_second)))
2179
 
    token_day = Token(re.compile(r"(\d+)D"),
2180
 
                      datetime.timedelta(days=1),
2181
 
                      frozenset((token_time, token_end)))
2182
 
    token_month = Token(re.compile(r"(\d+)M"),
2183
 
                        datetime.timedelta(weeks=4),
2184
 
                        frozenset((token_day, token_end)))
2185
 
    token_year = Token(re.compile(r"(\d+)Y"),
2186
 
                       datetime.timedelta(weeks=52),
2187
 
                       frozenset((token_month, token_end)))
2188
 
    token_week = Token(re.compile(r"(\d+)W"),
2189
 
                       datetime.timedelta(weeks=1),
2190
 
                       frozenset((token_end,)))
2191
 
    token_duration = Token(re.compile(r"P"), None,
2192
 
                           frozenset((token_year, token_month,
2193
 
                                      token_day, token_time,
2194
 
                                      token_week)))
2195
 
    # Define starting values
2196
 
    value = datetime.timedelta() # Value so far
2197
 
    found_token = None
2198
 
    followers = frozenset((token_duration,)) # Following valid tokens
2199
 
    s = duration                # String left to parse
2200
 
    # Loop until end token is found
2201
 
    while found_token is not token_end:
2202
 
        # Search for any currently valid tokens
2203
 
        for token in followers:
2204
 
            match = token.regexp.match(s)
2205
 
            if match is not None:
2206
 
                # Token found
2207
 
                if token.value is not None:
2208
 
                    # Value found, parse digits
2209
 
                    factor = int(match.group(1), 10)
2210
 
                    # Add to value so far
2211
 
                    value += factor * token.value
2212
 
                # Strip token from string
2213
 
                s = token.regexp.sub("", s, 1)
2214
 
                # Go to found token
2215
 
                found_token = token
2216
 
                # Set valid next tokens
2217
 
                followers = found_token.followers
2218
 
                break
2219
 
        else:
2220
 
            # No currently valid tokens were found
2221
 
            raise ValueError("Invalid RFC 3339 duration")
2222
 
    # End token found
2223
 
    return value
2224
576
 
2225
577
 
2226
578
def string_to_delta(interval):
2227
579
    """Parse a string and return a datetime.timedelta
2228
 
    
 
580
 
2229
581
    >>> string_to_delta('7d')
2230
582
    datetime.timedelta(7)
2231
583
    >>> string_to_delta('60s')
2234
586
    datetime.timedelta(0, 3600)
2235
587
    >>> string_to_delta('24h')
2236
588
    datetime.timedelta(1)
2237
 
    >>> string_to_delta('1w')
 
589
    >>> string_to_delta(u'1w')
2238
590
    datetime.timedelta(7)
2239
591
    >>> string_to_delta('5m 30s')
2240
592
    datetime.timedelta(0, 330)
2241
593
    """
2242
 
    
2243
 
    try:
2244
 
        return rfc3339_duration_to_delta(interval)
2245
 
    except ValueError:
2246
 
        pass
2247
 
    
2248
594
    timevalue = datetime.timedelta(0)
2249
595
    for s in interval.split():
2250
596
        try:
2251
 
            suffix = s[-1]
 
597
            suffix = unicode(s[-1])
2252
598
            value = int(s[:-1])
2253
 
            if suffix == "d":
 
599
            if suffix == u"d":
2254
600
                delta = datetime.timedelta(value)
2255
 
            elif suffix == "s":
 
601
            elif suffix == u"s":
2256
602
                delta = datetime.timedelta(0, value)
2257
 
            elif suffix == "m":
 
603
            elif suffix == u"m":
2258
604
                delta = datetime.timedelta(0, 0, 0, 0, value)
2259
 
            elif suffix == "h":
 
605
            elif suffix == u"h":
2260
606
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2261
 
            elif suffix == "w":
 
607
            elif suffix == u"w":
2262
608
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2263
609
            else:
2264
 
                raise ValueError("Unknown suffix {!r}"
2265
 
                                 .format(suffix))
2266
 
        except IndexError as e:
2267
 
            raise ValueError(*(e.args))
 
610
                raise ValueError
 
611
        except (ValueError, IndexError):
 
612
            raise ValueError
2268
613
        timevalue += delta
2269
614
    return timevalue
2270
615
 
2271
616
 
 
617
def server_state_changed(state):
 
618
    """Derived from the Avahi example code"""
 
619
    if state == avahi.SERVER_COLLISION:
 
620
        logger.error(u"Zeroconf server name collision")
 
621
        service.remove()
 
622
    elif state == avahi.SERVER_RUNNING:
 
623
        service.add()
 
624
 
 
625
 
 
626
def entry_group_state_changed(state, error):
 
627
    """Derived from the Avahi example code"""
 
628
    logger.debug(u"Avahi state change: %i", state)
 
629
    
 
630
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
631
        logger.debug(u"Zeroconf service established.")
 
632
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
633
        logger.warning(u"Zeroconf service name collision.")
 
634
        service.rename()
 
635
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
636
        logger.critical(u"Avahi: Error in group state changed %s",
 
637
                        unicode(error))
 
638
        raise AvahiGroupError("State changed: %s", str(error))
 
639
 
 
640
def if_nametoindex(interface):
 
641
    """Call the C function if_nametoindex(), or equivalent"""
 
642
    global if_nametoindex
 
643
    try:
 
644
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
645
            (ctypes.util.find_library("c")).if_nametoindex
 
646
    except (OSError, AttributeError):
 
647
        if "struct" not in sys.modules:
 
648
            import struct
 
649
        if "fcntl" not in sys.modules:
 
650
            import fcntl
 
651
        def if_nametoindex(interface):
 
652
            "Get an interface index the hard way, i.e. using fcntl()"
 
653
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
654
            s = socket.socket()
 
655
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
656
                                struct.pack("16s16x", interface))
 
657
            s.close()
 
658
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
659
            return interface_index
 
660
    return if_nametoindex(interface)
 
661
 
 
662
 
2272
663
def daemon(nochdir = False, noclose = False):
2273
664
    """See daemon(3).  Standard BSD Unix function.
2274
 
    
2275
665
    This should really exist as os.daemon, but it doesn't (yet)."""
2276
666
    if os.fork():
2277
667
        sys.exit()
2282
672
        sys.exit()
2283
673
    if not noclose:
2284
674
        # Close all standard open file descriptors
2285
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
675
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2286
676
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2287
 
            raise OSError(errno.ENODEV, "{} not a character device"
2288
 
                          .format(os.devnull))
 
677
            raise OSError(errno.ENODEV,
 
678
                          "/dev/null not a character device")
2289
679
        os.dup2(null, sys.stdin.fileno())
2290
680
        os.dup2(null, sys.stdout.fileno())
2291
681
        os.dup2(null, sys.stderr.fileno())
2294
684
 
2295
685
 
2296
686
def main():
2297
 
    
2298
 
    ##################################################################
2299
 
    # Parsing of options, both command line and config file
2300
 
    
2301
 
    parser = argparse.ArgumentParser()
2302
 
    parser.add_argument("-v", "--version", action="version",
2303
 
                        version = "%(prog)s {}".format(version),
2304
 
                        help="show version number and exit")
2305
 
    parser.add_argument("-i", "--interface", metavar="IF",
2306
 
                        help="Bind to interface IF")
2307
 
    parser.add_argument("-a", "--address",
2308
 
                        help="Address to listen for requests on")
2309
 
    parser.add_argument("-p", "--port", type=int,
2310
 
                        help="Port number to receive requests on")
2311
 
    parser.add_argument("--check", action="store_true",
2312
 
                        help="Run self-test")
2313
 
    parser.add_argument("--debug", action="store_true",
2314
 
                        help="Debug mode; run in foreground and log"
2315
 
                        " to terminal", default=None)
2316
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2317
 
                        help="Debug level for stdout output")
2318
 
    parser.add_argument("--priority", help="GnuTLS"
2319
 
                        " priority string (see GnuTLS documentation)")
2320
 
    parser.add_argument("--servicename",
2321
 
                        metavar="NAME", help="Zeroconf service name")
2322
 
    parser.add_argument("--configdir",
2323
 
                        default="/etc/mandos", metavar="DIR",
2324
 
                        help="Directory to search for configuration"
2325
 
                        " files")
2326
 
    parser.add_argument("--no-dbus", action="store_false",
2327
 
                        dest="use_dbus", help="Do not provide D-Bus"
2328
 
                        " system bus interface", default=None)
2329
 
    parser.add_argument("--no-ipv6", action="store_false",
2330
 
                        dest="use_ipv6", help="Do not use IPv6",
2331
 
                        default=None)
2332
 
    parser.add_argument("--no-restore", action="store_false",
2333
 
                        dest="restore", help="Do not restore stored"
2334
 
                        " state", default=None)
2335
 
    parser.add_argument("--socket", type=int,
2336
 
                        help="Specify a file descriptor to a network"
2337
 
                        " socket to use instead of creating one")
2338
 
    parser.add_argument("--statedir", metavar="DIR",
2339
 
                        help="Directory to save/restore state in")
2340
 
    parser.add_argument("--foreground", action="store_true",
2341
 
                        help="Run in foreground", default=None)
2342
 
    parser.add_argument("--no-zeroconf", action="store_false",
2343
 
                        dest="zeroconf", help="Do not use Zeroconf",
2344
 
                        default=None)
2345
 
    
2346
 
    options = parser.parse_args()
 
687
    parser = OptionParser(version = "%%prog %s" % version)
 
688
    parser.add_option("-i", "--interface", type="string",
 
689
                      metavar="IF", help="Bind to interface IF")
 
690
    parser.add_option("-a", "--address", type="string",
 
691
                      help="Address to listen for requests on")
 
692
    parser.add_option("-p", "--port", type="int",
 
693
                      help="Port number to receive requests on")
 
694
    parser.add_option("--check", action="store_true", default=False,
 
695
                      help="Run self-test")
 
696
    parser.add_option("--debug", action="store_true",
 
697
                      help="Debug mode; run in foreground and log to"
 
698
                      " terminal")
 
699
    parser.add_option("--priority", type="string", help="GnuTLS"
 
700
                      " priority string (see GnuTLS documentation)")
 
701
    parser.add_option("--servicename", type="string", metavar="NAME",
 
702
                      help="Zeroconf service name")
 
703
    parser.add_option("--configdir", type="string",
 
704
                      default="/etc/mandos", metavar="DIR",
 
705
                      help="Directory to search for configuration"
 
706
                      " files")
 
707
    options = parser.parse_args()[0]
2347
708
    
2348
709
    if options.check:
2349
710
        import doctest
2350
 
        fail_count, test_count = doctest.testmod()
2351
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
711
        doctest.testmod()
 
712
        sys.exit()
2352
713
    
2353
714
    # Default values for config file for server-global settings
2354
715
    server_defaults = { "interface": "",
2356
717
                        "port": "",
2357
718
                        "debug": "False",
2358
719
                        "priority":
2359
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
 
720
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2360
721
                        "servicename": "Mandos",
2361
 
                        "use_dbus": "True",
2362
 
                        "use_ipv6": "True",
2363
 
                        "debuglevel": "",
2364
 
                        "restore": "True",
2365
 
                        "socket": "",
2366
 
                        "statedir": "/var/lib/mandos",
2367
 
                        "foreground": "False",
2368
 
                        "zeroconf": "True",
2369
722
                        }
2370
723
    
2371
724
    # Parse config file for server-global settings
2372
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
725
    server_config = ConfigParser.SafeConfigParser(server_defaults)
2373
726
    del server_defaults
2374
 
    server_config.read(os.path.join(options.configdir,
2375
 
                                    "mandos.conf"))
 
727
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2376
728
    # Convert the SafeConfigParser object to a dict
2377
729
    server_settings = server_config.defaults()
2378
 
    # Use the appropriate methods on the non-string config options
2379
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2380
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2381
 
                                                           option)
2382
 
    if server_settings["port"]:
2383
 
        server_settings["port"] = server_config.getint("DEFAULT",
2384
 
                                                       "port")
2385
 
    if server_settings["socket"]:
2386
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2387
 
                                                         "socket")
2388
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2389
 
        # over with an opened os.devnull.  But we don't want this to
2390
 
        # happen with a supplied network socket.
2391
 
        if 0 <= server_settings["socket"] <= 2:
2392
 
            server_settings["socket"] = os.dup(server_settings
2393
 
                                               ["socket"])
 
730
    # Use getboolean on the boolean config option
 
731
    server_settings["debug"] = server_config.getboolean\
 
732
                               ("DEFAULT", "debug")
2394
733
    del server_config
2395
734
    
2396
735
    # Override the settings from the config file with command line
2397
736
    # options, if set.
2398
737
    for option in ("interface", "address", "port", "debug",
2399
 
                   "priority", "servicename", "configdir",
2400
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2401
 
                   "statedir", "socket", "foreground", "zeroconf"):
 
738
                   "priority", "servicename", "configdir"):
2402
739
        value = getattr(options, option)
2403
740
        if value is not None:
2404
741
            server_settings[option] = value
2405
742
    del options
2406
 
    # Force all strings to be unicode
2407
 
    for option in server_settings.keys():
2408
 
        if isinstance(server_settings[option], bytes):
2409
 
            server_settings[option] = (server_settings[option]
2410
 
                                       .decode("utf-8"))
2411
 
    # Force all boolean options to be boolean
2412
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2413
 
                   "foreground", "zeroconf"):
2414
 
        server_settings[option] = bool(server_settings[option])
2415
 
    # Debug implies foreground
2416
 
    if server_settings["debug"]:
2417
 
        server_settings["foreground"] = True
2418
743
    # Now we have our good server settings in "server_settings"
2419
744
    
2420
 
    ##################################################################
2421
 
    
2422
 
    if (not server_settings["zeroconf"] and
2423
 
        not (server_settings["port"]
2424
 
             or server_settings["socket"] != "")):
2425
 
            parser.error("Needs port or socket to work without"
2426
 
                         " Zeroconf")
2427
 
    
2428
 
    # For convenience
2429
745
    debug = server_settings["debug"]
2430
 
    debuglevel = server_settings["debuglevel"]
2431
 
    use_dbus = server_settings["use_dbus"]
2432
 
    use_ipv6 = server_settings["use_ipv6"]
2433
 
    stored_state_path = os.path.join(server_settings["statedir"],
2434
 
                                     stored_state_file)
2435
 
    foreground = server_settings["foreground"]
2436
 
    zeroconf = server_settings["zeroconf"]
2437
746
    
2438
 
    if debug:
2439
 
        initlogger(debug, logging.DEBUG)
2440
 
    else:
2441
 
        if not debuglevel:
2442
 
            initlogger(debug)
2443
 
        else:
2444
 
            level = getattr(logging, debuglevel.upper())
2445
 
            initlogger(debug, level)
 
747
    if not debug:
 
748
        syslogger.setLevel(logging.WARNING)
 
749
        console.setLevel(logging.WARNING)
2446
750
    
2447
751
    if server_settings["servicename"] != "Mandos":
2448
 
        syslogger.setFormatter(logging.Formatter
2449
 
                               ('Mandos ({}) [%(process)d]:'
2450
 
                                ' %(levelname)s: %(message)s'
2451
 
                                .format(server_settings
2452
 
                                        ["servicename"])))
 
752
        syslogger.setFormatter(logging.Formatter\
 
753
                               ('Mandos (%s): %%(levelname)s:'
 
754
                                ' %%(message)s'
 
755
                                % server_settings["servicename"]))
2453
756
    
2454
757
    # Parse config file with clients
2455
 
    client_config = configparser.SafeConfigParser(Client
2456
 
                                                  .client_defaults)
 
758
    client_defaults = { "timeout": "1h",
 
759
                        "interval": "5m",
 
760
                        "checker": "fping -q -- %(host)s",
 
761
                        "host": "",
 
762
                        }
 
763
    client_config = ConfigParser.SafeConfigParser(client_defaults)
2457
764
    client_config.read(os.path.join(server_settings["configdir"],
2458
765
                                    "clients.conf"))
2459
766
    
2460
 
    global mandos_dbus_service
2461
 
    mandos_dbus_service = None
2462
 
    
2463
 
    socketfd = None
2464
 
    if server_settings["socket"] != "":
2465
 
        socketfd = server_settings["socket"]
2466
 
    tcp_server = MandosServer((server_settings["address"],
2467
 
                               server_settings["port"]),
2468
 
                              ClientHandler,
2469
 
                              interface=(server_settings["interface"]
2470
 
                                         or None),
2471
 
                              use_ipv6=use_ipv6,
2472
 
                              gnutls_priority=
2473
 
                              server_settings["priority"],
2474
 
                              use_dbus=use_dbus,
2475
 
                              socketfd=socketfd)
2476
 
    if not foreground:
2477
 
        pidfilename = "/run/mandos.pid"
2478
 
        if not os.path.isdir("/run/."):
2479
 
            pidfilename = "/var/run/mandos.pid"
2480
 
        pidfile = None
2481
 
        try:
2482
 
            pidfile = open(pidfilename, "w")
2483
 
        except IOError as e:
2484
 
            logger.error("Could not open file %r", pidfilename,
2485
 
                         exc_info=e)
2486
 
    
2487
 
    for name in ("_mandos", "mandos", "nobody"):
2488
 
        try:
2489
 
            uid = pwd.getpwnam(name).pw_uid
2490
 
            gid = pwd.getpwnam(name).pw_gid
2491
 
            break
2492
 
        except KeyError:
2493
 
            continue
2494
 
    else:
2495
 
        uid = 65534
2496
 
        gid = 65534
2497
 
    try:
 
767
    clients = Set()
 
768
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
769
                                 server_settings["port"]),
 
770
                                TCP_handler,
 
771
                                settings=server_settings,
 
772
                                clients=clients)
 
773
    pidfilename = "/var/run/mandos.pid"
 
774
    try:
 
775
        pidfile = open(pidfilename, "w")
 
776
    except IOError, error:
 
777
        logger.error("Could not open file %r", pidfilename)
 
778
    
 
779
    uid = 65534
 
780
    gid = 65534
 
781
    try:
 
782
        uid = pwd.getpwnam("mandos").pw_uid
 
783
    except KeyError:
 
784
        try:
 
785
            uid = pwd.getpwnam("nobody").pw_uid
 
786
        except KeyError:
 
787
            pass
 
788
    try:
 
789
        gid = pwd.getpwnam("mandos").pw_gid
 
790
    except KeyError:
 
791
        try:
 
792
            gid = pwd.getpwnam("nogroup").pw_gid
 
793
        except KeyError:
 
794
            pass
 
795
    try:
 
796
        os.setuid(uid)
2498
797
        os.setgid(gid)
2499
 
        os.setuid(uid)
2500
 
    except OSError as error:
2501
 
        if error.errno != errno.EPERM:
2502
 
            raise
2503
 
    
2504
 
    if debug:
2505
 
        # Enable all possible GnuTLS debugging
2506
 
        
2507
 
        # "Use a log level over 10 to enable all debugging options."
2508
 
        # - GnuTLS manual
2509
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2510
 
        
2511
 
        @gnutls.library.types.gnutls_log_func
2512
 
        def debug_gnutls(level, string):
2513
 
            logger.debug("GnuTLS: %s", string[:-1])
2514
 
        
2515
 
        (gnutls.library.functions
2516
 
         .gnutls_global_set_log_function(debug_gnutls))
2517
 
        
2518
 
        # Redirect stdin so all checkers get /dev/null
2519
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2520
 
        os.dup2(null, sys.stdin.fileno())
2521
 
        if null > 2:
2522
 
            os.close(null)
2523
 
    
2524
 
    # Need to fork before connecting to D-Bus
2525
 
    if not foreground:
2526
 
        # Close all input and output, do double fork, etc.
2527
 
        daemon()
2528
 
    
2529
 
    # multiprocessing will use threads, so before we use gobject we
2530
 
    # need to inform gobject that threads will be used.
2531
 
    gobject.threads_init()
 
798
    except OSError, error:
 
799
        if error[0] != errno.EPERM:
 
800
            raise error
 
801
    
 
802
    global service
 
803
    service = AvahiService(name = server_settings["servicename"],
 
804
                           servicetype = "_mandos._tcp", )
 
805
    if server_settings["interface"]:
 
806
        service.interface = if_nametoindex\
 
807
                            (server_settings["interface"])
2532
808
    
2533
809
    global main_loop
 
810
    global bus
 
811
    global server
2534
812
    # From the Avahi example code
2535
 
    DBusGMainLoop(set_as_default=True)
 
813
    DBusGMainLoop(set_as_default=True )
2536
814
    main_loop = gobject.MainLoop()
2537
815
    bus = dbus.SystemBus()
 
816
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
817
                                           avahi.DBUS_PATH_SERVER),
 
818
                            avahi.DBUS_INTERFACE_SERVER)
2538
819
    # End of Avahi example code
2539
 
    if use_dbus:
2540
 
        try:
2541
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2542
 
                                            bus, do_not_queue=True)
2543
 
            old_bus_name = (dbus.service.BusName
2544
 
                            ("se.bsnet.fukt.Mandos", bus,
2545
 
                             do_not_queue=True))
2546
 
        except dbus.exceptions.NameExistsException as e:
2547
 
            logger.error("Disabling D-Bus:", exc_info=e)
2548
 
            use_dbus = False
2549
 
            server_settings["use_dbus"] = False
2550
 
            tcp_server.use_dbus = False
2551
 
    if zeroconf:
2552
 
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2553
 
        service = AvahiServiceToSyslog(name =
2554
 
                                       server_settings["servicename"],
2555
 
                                       servicetype = "_mandos._tcp",
2556
 
                                       protocol = protocol, bus = bus)
2557
 
        if server_settings["interface"]:
2558
 
            service.interface = (if_nametoindex
2559
 
                                 (server_settings["interface"]
2560
 
                                  .encode("utf-8")))
2561
 
    
2562
 
    global multiprocessing_manager
2563
 
    multiprocessing_manager = multiprocessing.Manager()
2564
 
    
2565
 
    client_class = Client
2566
 
    if use_dbus:
2567
 
        client_class = functools.partial(ClientDBus, bus = bus)
2568
 
    
2569
 
    client_settings = Client.config_parser(client_config)
2570
 
    old_client_settings = {}
2571
 
    clients_data = {}
2572
 
    
2573
 
    # This is used to redirect stdout and stderr for checker processes
2574
 
    global wnull
2575
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2576
 
    # Only used if server is running in foreground but not in debug
2577
 
    # mode
2578
 
    if debug or not foreground:
2579
 
        wnull.close()
2580
 
    
2581
 
    # Get client data and settings from last running state.
2582
 
    if server_settings["restore"]:
2583
 
        try:
2584
 
            with open(stored_state_path, "rb") as stored_state:
2585
 
                clients_data, old_client_settings = (pickle.load
2586
 
                                                     (stored_state))
2587
 
            os.remove(stored_state_path)
2588
 
        except IOError as e:
2589
 
            if e.errno == errno.ENOENT:
2590
 
                logger.warning("Could not load persistent state: {}"
2591
 
                                .format(os.strerror(e.errno)))
2592
 
            else:
2593
 
                logger.critical("Could not load persistent state:",
2594
 
                                exc_info=e)
2595
 
                raise
2596
 
        except EOFError as e:
2597
 
            logger.warning("Could not load persistent state: "
2598
 
                           "EOFError:", exc_info=e)
2599
 
    
2600
 
    with PGPEngine() as pgp:
2601
 
        for client_name, client in clients_data.items():
2602
 
            # Skip removed clients
2603
 
            if client_name not in client_settings:
2604
 
                continue
2605
 
            
2606
 
            # Decide which value to use after restoring saved state.
2607
 
            # We have three different values: Old config file,
2608
 
            # new config file, and saved state.
2609
 
            # New config value takes precedence if it differs from old
2610
 
            # config value, otherwise use saved state.
2611
 
            for name, value in client_settings[client_name].items():
2612
 
                try:
2613
 
                    # For each value in new config, check if it
2614
 
                    # differs from the old config value (Except for
2615
 
                    # the "secret" attribute)
2616
 
                    if (name != "secret" and
2617
 
                        value != old_client_settings[client_name]
2618
 
                        [name]):
2619
 
                        client[name] = value
2620
 
                except KeyError:
2621
 
                    pass
2622
 
            
2623
 
            # Clients who has passed its expire date can still be
2624
 
            # enabled if its last checker was successful.  Clients
2625
 
            # whose checker succeeded before we stored its state is
2626
 
            # assumed to have successfully run all checkers during
2627
 
            # downtime.
2628
 
            if client["enabled"]:
2629
 
                if datetime.datetime.utcnow() >= client["expires"]:
2630
 
                    if not client["last_checked_ok"]:
2631
 
                        logger.warning(
2632
 
                            "disabling client {} - Client never "
2633
 
                            "performed a successful checker"
2634
 
                            .format(client_name))
2635
 
                        client["enabled"] = False
2636
 
                    elif client["last_checker_status"] != 0:
2637
 
                        logger.warning(
2638
 
                            "disabling client {} - Client last"
2639
 
                            " checker failed with error code {}"
2640
 
                            .format(client_name,
2641
 
                                    client["last_checker_status"]))
2642
 
                        client["enabled"] = False
2643
 
                    else:
2644
 
                        client["expires"] = (datetime.datetime
2645
 
                                             .utcnow()
2646
 
                                             + client["timeout"])
2647
 
                        logger.debug("Last checker succeeded,"
2648
 
                                     " keeping {} enabled"
2649
 
                                     .format(client_name))
2650
 
            try:
2651
 
                client["secret"] = (
2652
 
                    pgp.decrypt(client["encrypted_secret"],
2653
 
                                client_settings[client_name]
2654
 
                                ["secret"]))
2655
 
            except PGPError:
2656
 
                # If decryption fails, we use secret from new settings
2657
 
                logger.debug("Failed to decrypt {} old secret"
2658
 
                             .format(client_name))
2659
 
                client["secret"] = (
2660
 
                    client_settings[client_name]["secret"])
2661
 
    
2662
 
    # Add/remove clients based on new changes made to config
2663
 
    for client_name in (set(old_client_settings)
2664
 
                        - set(client_settings)):
2665
 
        del clients_data[client_name]
2666
 
    for client_name in (set(client_settings)
2667
 
                        - set(old_client_settings)):
2668
 
        clients_data[client_name] = client_settings[client_name]
2669
 
    
2670
 
    # Create all client objects
2671
 
    for client_name, client in clients_data.items():
2672
 
        tcp_server.clients[client_name] = client_class(
2673
 
            name = client_name, settings = client,
2674
 
            server_settings = server_settings)
2675
 
    
2676
 
    if not tcp_server.clients:
2677
 
        logger.warning("No clients defined")
2678
 
    
2679
 
    if not foreground:
2680
 
        if pidfile is not None:
2681
 
            try:
2682
 
                with pidfile:
2683
 
                    pid = os.getpid()
2684
 
                    pidfile.write("{}\n".format(pid).encode("utf-8"))
2685
 
            except IOError:
2686
 
                logger.error("Could not write to file %r with PID %d",
2687
 
                             pidfilename, pid)
 
820
    
 
821
    def remove_from_clients(client):
 
822
        clients.remove(client)
 
823
        if not clients:
 
824
            logger.critical(u"No clients left, exiting")
 
825
            sys.exit()
 
826
    
 
827
    clients.update(Set(Client(name = section,
 
828
                              stop_hook = remove_from_clients,
 
829
                              config
 
830
                              = dict(client_config.items(section)))
 
831
                       for section in client_config.sections()))
 
832
    if not clients:
 
833
        logger.critical(u"No clients defined")
 
834
        sys.exit(1)
 
835
    
 
836
    if debug:
 
837
        # Redirect stdin so all checkers get /dev/null
 
838
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
839
        os.dup2(null, sys.stdin.fileno())
 
840
        if null > 2:
 
841
            os.close(null)
 
842
    else:
 
843
        # No console logging
 
844
        logger.removeHandler(console)
 
845
        # Close all input and output, do double fork, etc.
 
846
        daemon()
 
847
    
 
848
    try:
 
849
        pid = os.getpid()
 
850
        pidfile.write(str(pid) + "\n")
 
851
        pidfile.close()
2688
852
        del pidfile
2689
 
        del pidfilename
2690
 
    
2691
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2692
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2693
 
    
2694
 
    if use_dbus:
2695
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2696
 
                                        "se.bsnet.fukt.Mandos"})
2697
 
        class MandosDBusService(DBusObjectWithProperties):
2698
 
            """A D-Bus proxy object"""
2699
 
            def __init__(self):
2700
 
                dbus.service.Object.__init__(self, bus, "/")
2701
 
            _interface = "se.recompile.Mandos"
2702
 
            
2703
 
            @dbus_interface_annotations(_interface)
2704
 
            def _foo(self):
2705
 
                return { "org.freedesktop.DBus.Property"
2706
 
                         ".EmitsChangedSignal":
2707
 
                             "false"}
2708
 
            
2709
 
            @dbus.service.signal(_interface, signature="o")
2710
 
            def ClientAdded(self, objpath):
2711
 
                "D-Bus signal"
2712
 
                pass
2713
 
            
2714
 
            @dbus.service.signal(_interface, signature="ss")
2715
 
            def ClientNotFound(self, fingerprint, address):
2716
 
                "D-Bus signal"
2717
 
                pass
2718
 
            
2719
 
            @dbus.service.signal(_interface, signature="os")
2720
 
            def ClientRemoved(self, objpath, name):
2721
 
                "D-Bus signal"
2722
 
                pass
2723
 
            
2724
 
            @dbus.service.method(_interface, out_signature="ao")
2725
 
            def GetAllClients(self):
2726
 
                "D-Bus method"
2727
 
                return dbus.Array(c.dbus_object_path
2728
 
                                  for c in
2729
 
                                  tcp_server.clients.itervalues())
2730
 
            
2731
 
            @dbus.service.method(_interface,
2732
 
                                 out_signature="a{oa{sv}}")
2733
 
            def GetAllClientsWithProperties(self):
2734
 
                "D-Bus method"
2735
 
                return dbus.Dictionary(
2736
 
                    { c.dbus_object_path: c.GetAll("")
2737
 
                      for c in tcp_server.clients.itervalues() },
2738
 
                    signature="oa{sv}")
2739
 
            
2740
 
            @dbus.service.method(_interface, in_signature="o")
2741
 
            def RemoveClient(self, object_path):
2742
 
                "D-Bus method"
2743
 
                for c in tcp_server.clients.itervalues():
2744
 
                    if c.dbus_object_path == object_path:
2745
 
                        del tcp_server.clients[c.name]
2746
 
                        c.remove_from_connection()
2747
 
                        # Don't signal anything except ClientRemoved
2748
 
                        c.disable(quiet=True)
2749
 
                        # Emit D-Bus signal
2750
 
                        self.ClientRemoved(object_path, c.name)
2751
 
                        return
2752
 
                raise KeyError(object_path)
2753
 
            
2754
 
            del _interface
2755
 
        
2756
 
        mandos_dbus_service = MandosDBusService()
 
853
    except IOError:
 
854
        logger.error(u"Could not write to file %r with PID %d",
 
855
                     pidfilename, pid)
 
856
    except NameError:
 
857
        # "pidfile" was never created
 
858
        pass
 
859
    del pidfilename
2757
860
    
2758
861
    def cleanup():
2759
862
        "Cleanup function; run on exit"
2760
 
        if zeroconf:
2761
 
            service.cleanup()
2762
 
        
2763
 
        multiprocessing.active_children()
2764
 
        wnull.close()
2765
 
        if not (tcp_server.clients or client_settings):
2766
 
            return
2767
 
        
2768
 
        # Store client before exiting. Secrets are encrypted with key
2769
 
        # based on what config file has. If config file is
2770
 
        # removed/edited, old secret will thus be unrecovable.
2771
 
        clients = {}
2772
 
        with PGPEngine() as pgp:
2773
 
            for client in tcp_server.clients.itervalues():
2774
 
                key = client_settings[client.name]["secret"]
2775
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2776
 
                                                      key)
2777
 
                client_dict = {}
2778
 
                
2779
 
                # A list of attributes that can not be pickled
2780
 
                # + secret.
2781
 
                exclude = { "bus", "changedstate", "secret",
2782
 
                            "checker", "server_settings" }
2783
 
                for name, typ in (inspect.getmembers
2784
 
                                  (dbus.service.Object)):
2785
 
                    exclude.add(name)
2786
 
                
2787
 
                client_dict["encrypted_secret"] = (client
2788
 
                                                   .encrypted_secret)
2789
 
                for attr in client.client_structure:
2790
 
                    if attr not in exclude:
2791
 
                        client_dict[attr] = getattr(client, attr)
2792
 
                
2793
 
                clients[client.name] = client_dict
2794
 
                del client_settings[client.name]["secret"]
2795
 
        
2796
 
        try:
2797
 
            with (tempfile.NamedTemporaryFile
2798
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2799
 
                   dir=os.path.dirname(stored_state_path),
2800
 
                   delete=False)) as stored_state:
2801
 
                pickle.dump((clients, client_settings), stored_state)
2802
 
                tempname=stored_state.name
2803
 
            os.rename(tempname, stored_state_path)
2804
 
        except (IOError, OSError) as e:
2805
 
            if not debug:
2806
 
                try:
2807
 
                    os.remove(tempname)
2808
 
                except NameError:
2809
 
                    pass
2810
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2811
 
                logger.warning("Could not save persistent state: {}"
2812
 
                               .format(os.strerror(e.errno)))
2813
 
            else:
2814
 
                logger.warning("Could not save persistent state:",
2815
 
                               exc_info=e)
2816
 
                raise
2817
 
        
2818
 
        # Delete all clients, and settings from config
2819
 
        while tcp_server.clients:
2820
 
            name, client = tcp_server.clients.popitem()
2821
 
            if use_dbus:
2822
 
                client.remove_from_connection()
2823
 
            # Don't signal anything except ClientRemoved
2824
 
            client.disable(quiet=True)
2825
 
            if use_dbus:
2826
 
                # Emit D-Bus signal
2827
 
                mandos_dbus_service.ClientRemoved(client
2828
 
                                                  .dbus_object_path,
2829
 
                                                  client.name)
2830
 
        client_settings.clear()
 
863
        global group
 
864
        # From the Avahi example code
 
865
        if not group is None:
 
866
            group.Free()
 
867
            group = None
 
868
        # End of Avahi example code
 
869
        
 
870
        while clients:
 
871
            client = clients.pop()
 
872
            client.stop_hook = None
 
873
            client.stop()
2831
874
    
2832
875
    atexit.register(cleanup)
2833
876
    
2834
 
    for client in tcp_server.clients.itervalues():
2835
 
        if use_dbus:
2836
 
            # Emit D-Bus signal
2837
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2838
 
        # Need to initiate checking of clients
2839
 
        if client.enabled:
2840
 
            client.init_checker()
 
877
    if not debug:
 
878
        signal.signal(signal.SIGINT, signal.SIG_IGN)
 
879
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
 
880
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
 
881
    
 
882
    for client in clients:
 
883
        client.start()
2841
884
    
2842
885
    tcp_server.enable()
2843
886
    tcp_server.server_activate()
2844
887
    
2845
888
    # Find out what port we got
2846
 
    if zeroconf:
2847
 
        service.port = tcp_server.socket.getsockname()[1]
2848
 
    if use_ipv6:
2849
 
        logger.info("Now listening on address %r, port %d,"
2850
 
                    " flowinfo %d, scope_id %d",
2851
 
                    *tcp_server.socket.getsockname())
2852
 
    else:                       # IPv4
2853
 
        logger.info("Now listening on address %r, port %d",
2854
 
                    *tcp_server.socket.getsockname())
 
889
    service.port = tcp_server.socket.getsockname()[1]
 
890
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
891
                u" scope_id %d" % tcp_server.socket.getsockname())
2855
892
    
2856
893
    #service.interface = tcp_server.socket.getsockname()[3]
2857
894
    
2858
895
    try:
2859
 
        if zeroconf:
2860
 
            # From the Avahi example code
2861
 
            try:
2862
 
                service.activate()
2863
 
            except dbus.exceptions.DBusException as error:
2864
 
                logger.critical("D-Bus Exception", exc_info=error)
2865
 
                cleanup()
2866
 
                sys.exit(1)
2867
 
            # End of Avahi example code
 
896
        # From the Avahi example code
 
897
        server.connect_to_signal("StateChanged", server_state_changed)
 
898
        try:
 
899
            server_state_changed(server.GetState())
 
900
        except dbus.exceptions.DBusException, error:
 
901
            logger.critical(u"DBusException: %s", error)
 
902
            sys.exit(1)
 
903
        # End of Avahi example code
2868
904
        
2869
905
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2870
906
                             lambda *args, **kwargs:
2871
 
                             (tcp_server.handle_request
2872
 
                              (*args[2:], **kwargs) or True))
 
907
                             tcp_server.handle_request\
 
908
                             (*args[2:], **kwargs) or True)
2873
909
        
2874
 
        logger.debug("Starting main loop")
 
910
        logger.debug(u"Starting main loop")
2875
911
        main_loop.run()
2876
 
    except AvahiError as error:
2877
 
        logger.critical("Avahi Error", exc_info=error)
2878
 
        cleanup()
 
912
    except AvahiError, error:
 
913
        logger.critical(u"AvahiError: %s" + unicode(error))
2879
914
        sys.exit(1)
2880
915
    except KeyboardInterrupt:
2881
916
        if debug:
2882
 
            print("", file=sys.stderr)
2883
 
        logger.debug("Server received KeyboardInterrupt")
2884
 
    logger.debug("Server exiting")
2885
 
    # Must run before the D-Bus bus name gets deregistered
2886
 
    cleanup()
 
917
            print
2887
918
 
2888
919
if __name__ == '__main__':
2889
920
    main()