/mandos/trunk

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

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added added

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Lines of Context:
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008-2013 Teddy Hogeborn
15
 
# Copyright © 2008-2013 Björn Påhlsson
 
14
# Copyright © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
16
16
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program.  If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
31
 
# Contact the authors at <mandos@recompile.se>.
 
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
33
33
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
36
 
 
37
 
from future_builtins import *
38
 
 
39
 
import SocketServer as socketserver
 
34
from __future__ import division, with_statement, absolute_import
 
35
 
 
36
import SocketServer
40
37
import socket
41
 
import argparse
 
38
import optparse
42
39
import datetime
43
40
import errno
44
41
import gnutls.crypto
47
44
import gnutls.library.functions
48
45
import gnutls.library.constants
49
46
import gnutls.library.types
50
 
import ConfigParser as configparser
 
47
import ConfigParser
51
48
import sys
52
49
import re
53
50
import os
54
51
import signal
 
52
from sets import Set
55
53
import subprocess
56
54
import atexit
57
55
import stat
58
56
import logging
59
57
import logging.handlers
60
58
import pwd
61
 
import contextlib
62
 
import struct
63
 
import fcntl
64
 
import functools
65
 
import cPickle as pickle
66
 
import multiprocessing
67
 
import types
68
 
import binascii
69
 
import tempfile
70
 
import itertools
71
 
import collections
 
59
from contextlib import closing
72
60
 
73
61
import dbus
74
62
import dbus.service
77
65
from dbus.mainloop.glib import DBusGMainLoop
78
66
import ctypes
79
67
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
 
version = "1.6.2"
92
 
stored_state_file = "clients.pickle"
93
 
 
94
 
logger = logging.getLogger()
 
68
 
 
69
version = "1.0.5"
 
70
 
 
71
logger = logging.Logger('mandos')
95
72
syslogger = (logging.handlers.SysLogHandler
96
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
97
 
              address = str("/dev/log")))
98
 
 
99
 
try:
100
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
101
 
                      (ctypes.util.find_library("c"))
102
 
                      .if_nametoindex)
103
 
except (OSError, AttributeError):
104
 
    def if_nametoindex(interface):
105
 
        "Get an interface index the hard way, i.e. using fcntl()"
106
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
107
 
        with contextlib.closing(socket.socket()) as s:
108
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
109
 
                                struct.pack(str("16s16x"),
110
 
                                            interface))
111
 
        interface_index = struct.unpack(str("I"),
112
 
                                        ifreq[16:20])[0]
113
 
        return interface_index
114
 
 
115
 
 
116
 
def initlogger(debug, level=logging.WARNING):
117
 
    """init logger and add loglevel"""
118
 
    
119
 
    syslogger.setFormatter(logging.Formatter
120
 
                           ('Mandos [%(process)d]: %(levelname)s:'
121
 
                            ' %(message)s'))
122
 
    logger.addHandler(syslogger)
123
 
    
124
 
    if debug:
125
 
        console = logging.StreamHandler()
126
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
127
 
                                               ' [%(process)d]:'
128
 
                                               ' %(levelname)s:'
129
 
                                               ' %(message)s'))
130
 
        logger.addHandler(console)
131
 
    logger.setLevel(level)
132
 
 
133
 
 
134
 
class PGPError(Exception):
135
 
    """Exception if encryption/decryption fails"""
136
 
    pass
137
 
 
138
 
 
139
 
class PGPEngine(object):
140
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
141
 
    def __init__(self):
142
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
143
 
        self.gnupgargs = ['--batch',
144
 
                          '--home', self.tempdir,
145
 
                          '--force-mdc',
146
 
                          '--quiet',
147
 
                          '--no-use-agent']
148
 
    
149
 
    def __enter__(self):
150
 
        return self
151
 
    
152
 
    def __exit__(self, exc_type, exc_value, traceback):
153
 
        self._cleanup()
154
 
        return False
155
 
    
156
 
    def __del__(self):
157
 
        self._cleanup()
158
 
    
159
 
    def _cleanup(self):
160
 
        if self.tempdir is not None:
161
 
            # Delete contents of tempdir
162
 
            for root, dirs, files in os.walk(self.tempdir,
163
 
                                             topdown = False):
164
 
                for filename in files:
165
 
                    os.remove(os.path.join(root, filename))
166
 
                for dirname in dirs:
167
 
                    os.rmdir(os.path.join(root, dirname))
168
 
            # Remove tempdir
169
 
            os.rmdir(self.tempdir)
170
 
            self.tempdir = None
171
 
    
172
 
    def password_encode(self, password):
173
 
        # Passphrase can not be empty and can not contain newlines or
174
 
        # NUL bytes.  So we prefix it and hex encode it.
175
 
        encoded = b"mandos" + binascii.hexlify(password)
176
 
        if len(encoded) > 2048:
177
 
            # GnuPG can't handle long passwords, so encode differently
178
 
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
179
 
                       .replace(b"\n", b"\\n")
180
 
                       .replace(b"\0", b"\\x00"))
181
 
        return encoded
182
 
    
183
 
    def encrypt(self, data, password):
184
 
        passphrase = self.password_encode(password)
185
 
        with tempfile.NamedTemporaryFile(dir=self.tempdir
186
 
                                         ) as passfile:
187
 
            passfile.write(passphrase)
188
 
            passfile.flush()
189
 
            proc = subprocess.Popen(['gpg', '--symmetric',
190
 
                                     '--passphrase-file',
191
 
                                     passfile.name]
192
 
                                    + self.gnupgargs,
193
 
                                    stdin = subprocess.PIPE,
194
 
                                    stdout = subprocess.PIPE,
195
 
                                    stderr = subprocess.PIPE)
196
 
            ciphertext, err = proc.communicate(input = data)
197
 
        if proc.returncode != 0:
198
 
            raise PGPError(err)
199
 
        return ciphertext
200
 
    
201
 
    def decrypt(self, data, password):
202
 
        passphrase = self.password_encode(password)
203
 
        with tempfile.NamedTemporaryFile(dir = self.tempdir
204
 
                                         ) as passfile:
205
 
            passfile.write(passphrase)
206
 
            passfile.flush()
207
 
            proc = subprocess.Popen(['gpg', '--decrypt',
208
 
                                     '--passphrase-file',
209
 
                                     passfile.name]
210
 
                                    + self.gnupgargs,
211
 
                                    stdin = subprocess.PIPE,
212
 
                                    stdout = subprocess.PIPE,
213
 
                                    stderr = subprocess.PIPE)
214
 
            decrypted_plaintext, err = proc.communicate(input
215
 
                                                        = data)
216
 
        if proc.returncode != 0:
217
 
            raise PGPError(err)
218
 
        return decrypted_plaintext
219
 
 
 
74
              address = "/dev/log"))
 
75
syslogger.setFormatter(logging.Formatter
 
76
                       ('Mandos: %(levelname)s: %(message)s'))
 
77
logger.addHandler(syslogger)
 
78
 
 
79
console = logging.StreamHandler()
 
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
81
                                       ' %(message)s'))
 
82
logger.addHandler(console)
220
83
 
221
84
class AvahiError(Exception):
222
85
    def __init__(self, value, *args, **kwargs):
234
97
 
235
98
class AvahiService(object):
236
99
    """An Avahi (Zeroconf) service.
237
 
    
238
100
    Attributes:
239
101
    interface: integer; avahi.IF_UNSPEC or an interface index.
240
102
               Used to optionally bind to the specified interface.
241
103
    name: string; Example: 'Mandos'
242
104
    type: string; Example: '_mandos._tcp'.
243
 
     See <https://www.iana.org/assignments/service-names-port-numbers>
 
105
                  See <http://www.dns-sd.org/ServiceTypes.html>
244
106
    port: integer; what port to announce
245
107
    TXT: list of strings; TXT record for the service
246
108
    domain: string; Domain to publish on, default to .local if empty.
248
110
    max_renames: integer; maximum number of renames
249
111
    rename_count: integer; counter so we only rename after collisions
250
112
                  a sensible number of times
251
 
    group: D-Bus Entry Group
252
 
    server: D-Bus Server
253
 
    bus: dbus.SystemBus()
254
113
    """
255
 
    
256
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
257
115
                 servicetype = None, port = None, TXT = None,
258
 
                 domain = "", host = "", max_renames = 32768,
259
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
116
                 domain = "", host = "", max_renames = 32768):
260
117
        self.interface = interface
261
118
        self.name = name
262
119
        self.type = servicetype
266
123
        self.host = host
267
124
        self.rename_count = 0
268
125
        self.max_renames = max_renames
269
 
        self.protocol = protocol
270
 
        self.group = None       # our entry group
271
 
        self.server = None
272
 
        self.bus = bus
273
 
        self.entry_group_state_changed_match = None
274
 
    
275
126
    def rename(self):
276
127
        """Derived from the Avahi example code"""
277
128
        if self.rename_count >= self.max_renames:
278
 
            logger.critical("No suitable Zeroconf service name found"
279
 
                            " after %i retries, exiting.",
 
129
            logger.critical(u"No suitable Zeroconf service name found"
 
130
                            u" after %i retries, exiting.",
280
131
                            self.rename_count)
281
 
            raise AvahiServiceError("Too many renames")
282
 
        self.name = unicode(self.server
283
 
                            .GetAlternativeServiceName(self.name))
284
 
        logger.info("Changing Zeroconf service name to %r ...",
285
 
                    self.name)
 
132
            raise AvahiServiceError(u"Too many renames")
 
133
        self.name = server.GetAlternativeServiceName(self.name)
 
134
        logger.info(u"Changing Zeroconf service name to %r ...",
 
135
                    str(self.name))
 
136
        syslogger.setFormatter(logging.Formatter
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                                ' %%(message)s' % self.name))
286
139
        self.remove()
287
 
        try:
288
 
            self.add()
289
 
        except dbus.exceptions.DBusException as error:
290
 
            logger.critical("D-Bus Exception", exc_info=error)
291
 
            self.cleanup()
292
 
            os._exit(1)
 
140
        self.add()
293
141
        self.rename_count += 1
294
 
    
295
142
    def remove(self):
296
143
        """Derived from the Avahi example code"""
297
 
        if self.entry_group_state_changed_match is not None:
298
 
            self.entry_group_state_changed_match.remove()
299
 
            self.entry_group_state_changed_match = None
300
 
        if self.group is not None:
301
 
            self.group.Reset()
302
 
    
 
144
        if group is not None:
 
145
            group.Reset()
303
146
    def add(self):
304
147
        """Derived from the Avahi example code"""
305
 
        self.remove()
306
 
        if self.group is None:
307
 
            self.group = dbus.Interface(
308
 
                self.bus.get_object(avahi.DBUS_NAME,
309
 
                                    self.server.EntryGroupNew()),
310
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
311
 
        self.entry_group_state_changed_match = (
312
 
            self.group.connect_to_signal(
313
 
                'StateChanged', self.entry_group_state_changed))
314
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
315
 
                     self.name, self.type)
316
 
        self.group.AddService(
317
 
            self.interface,
318
 
            self.protocol,
319
 
            dbus.UInt32(0),     # flags
320
 
            self.name, self.type,
321
 
            self.domain, self.host,
322
 
            dbus.UInt16(self.port),
323
 
            avahi.string_array_to_txt_array(self.TXT))
324
 
        self.group.Commit()
325
 
    
326
 
    def entry_group_state_changed(self, state, error):
327
 
        """Derived from the Avahi example code"""
328
 
        logger.debug("Avahi entry group state change: %i", state)
329
 
        
330
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
331
 
            logger.debug("Zeroconf service established.")
332
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
333
 
            logger.info("Zeroconf service name collision.")
334
 
            self.rename()
335
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
336
 
            logger.critical("Avahi: Error in group state changed %s",
337
 
                            unicode(error))
338
 
            raise AvahiGroupError("State changed: {0!s}"
339
 
                                  .format(error))
340
 
    
341
 
    def cleanup(self):
342
 
        """Derived from the Avahi example code"""
343
 
        if self.group is not None:
344
 
            try:
345
 
                self.group.Free()
346
 
            except (dbus.exceptions.UnknownMethodException,
347
 
                    dbus.exceptions.DBusException):
348
 
                pass
349
 
            self.group = None
350
 
        self.remove()
351
 
    
352
 
    def server_state_changed(self, state, error=None):
353
 
        """Derived from the Avahi example code"""
354
 
        logger.debug("Avahi server state change: %i", state)
355
 
        bad_states = { avahi.SERVER_INVALID:
356
 
                           "Zeroconf server invalid",
357
 
                       avahi.SERVER_REGISTERING: None,
358
 
                       avahi.SERVER_COLLISION:
359
 
                           "Zeroconf server name collision",
360
 
                       avahi.SERVER_FAILURE:
361
 
                           "Zeroconf server failure" }
362
 
        if state in bad_states:
363
 
            if bad_states[state] is not None:
364
 
                if error is None:
365
 
                    logger.error(bad_states[state])
366
 
                else:
367
 
                    logger.error(bad_states[state] + ": %r", error)
368
 
            self.cleanup()
369
 
        elif state == avahi.SERVER_RUNNING:
370
 
            self.add()
371
 
        else:
372
 
            if error is None:
373
 
                logger.debug("Unknown state: %r", state)
374
 
            else:
375
 
                logger.debug("Unknown state: %r: %r", state, error)
376
 
    
377
 
    def activate(self):
378
 
        """Derived from the Avahi example code"""
379
 
        if self.server is None:
380
 
            self.server = dbus.Interface(
381
 
                self.bus.get_object(avahi.DBUS_NAME,
382
 
                                    avahi.DBUS_PATH_SERVER,
383
 
                                    follow_name_owner_changes=True),
384
 
                avahi.DBUS_INTERFACE_SERVER)
385
 
        self.server.connect_to_signal("StateChanged",
386
 
                                 self.server_state_changed)
387
 
        self.server_state_changed(self.server.GetState())
388
 
 
389
 
 
390
 
class AvahiServiceToSyslog(AvahiService):
391
 
    def rename(self):
392
 
        """Add the new name to the syslog messages"""
393
 
        ret = AvahiService.rename(self)
394
 
        syslogger.setFormatter(logging.Formatter
395
 
                               ('Mandos ({0}) [%(process)d]:'
396
 
                                ' %(levelname)s: %(message)s'
397
 
                                .format(self.name)))
398
 
        return ret
399
 
 
400
 
 
401
 
def timedelta_to_milliseconds(td):
402
 
    "Convert a datetime.timedelta() to milliseconds"
403
 
    return ((td.days * 24 * 60 * 60 * 1000)
404
 
            + (td.seconds * 1000)
405
 
            + (td.microseconds // 1000))
406
 
 
407
 
 
408
 
class Client(object):
 
148
        global group
 
149
        if group is None:
 
150
            group = dbus.Interface(bus.get_object
 
151
                                   (avahi.DBUS_NAME,
 
152
                                    server.EntryGroupNew()),
 
153
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
            group.connect_to_signal('StateChanged',
 
155
                                    entry_group_state_changed)
 
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
157
                     service.name, service.type)
 
158
        group.AddService(
 
159
                self.interface,         # interface
 
160
                avahi.PROTO_INET6,      # protocol
 
161
                dbus.UInt32(0),         # flags
 
162
                self.name, self.type,
 
163
                self.domain, self.host,
 
164
                dbus.UInt16(self.port),
 
165
                avahi.string_array_to_txt_array(self.TXT))
 
166
        group.Commit()
 
167
 
 
168
# From the Avahi example code:
 
169
group = None                            # our entry group
 
170
# End of Avahi example code
 
171
 
 
172
 
 
173
def _datetime_to_dbus(dt, variant_level=0):
 
174
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
175
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
176
 
 
177
 
 
178
class Client(dbus.service.Object):
409
179
    """A representation of a client host served by this server.
410
 
    
411
180
    Attributes:
412
 
    approved:   bool(); 'None' if not yet approved/disapproved
413
 
    approval_delay: datetime.timedelta(); Time to wait for approval
414
 
    approval_duration: datetime.timedelta(); Duration of one approval
 
181
    name:       string; from the config file, used in log messages
 
182
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
183
                 uniquely identify the client
 
184
    secret:     bytestring; sent verbatim (over TLS) to client
 
185
    host:       string; available for use by the checker command
 
186
    created:    datetime.datetime(); (UTC) object creation
 
187
    last_enabled: datetime.datetime(); (UTC)
 
188
    enabled:    bool()
 
189
    last_checked_ok: datetime.datetime(); (UTC) or None
 
190
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
191
                                      until this client is invalid
 
192
    interval:   datetime.timedelta(); How often to start a new checker
 
193
    disable_hook:  If set, called by disable() as disable_hook(self)
415
194
    checker:    subprocess.Popen(); a running checker process used
416
195
                                    to see if the client lives.
417
196
                                    'None' if no process is running.
418
 
    checker_callback_tag: a gobject event source tag, or None
419
 
    checker_command: string; External command which is run to check
420
 
                     if client lives.  %() expansions are done at
 
197
    checker_initiator_tag: a gobject event source tag, or None
 
198
    disable_initiator_tag:    - '' -
 
199
    checker_callback_tag:  - '' -
 
200
    checker_command: string; External command which is run to check if
 
201
                     client lives.  %() expansions are done at
421
202
                     runtime with vars(self) as dict, so that for
422
203
                     instance %(name)s can be used in the command.
423
 
    checker_initiator_tag: a gobject event source tag, or None
424
 
    created:    datetime.datetime(); (UTC) object creation
425
 
    client_structure: Object describing what attributes a client has
426
 
                      and is used for storing the client at exit
427
 
    current_checker_command: string; current running checker_command
428
 
    disable_initiator_tag: a gobject event source tag, or None
429
 
    enabled:    bool()
430
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
431
 
                 uniquely identify the client
432
 
    host:       string; available for use by the checker command
433
 
    interval:   datetime.timedelta(); How often to start a new checker
434
 
    last_approval_request: datetime.datetime(); (UTC) or None
435
 
    last_checked_ok: datetime.datetime(); (UTC) or None
436
 
    last_checker_status: integer between 0 and 255 reflecting exit
437
 
                         status of last checker. -1 reflects crashed
438
 
                         checker, -2 means no checker completed yet.
439
 
    last_enabled: datetime.datetime(); (UTC) or None
440
 
    name:       string; from the config file, used in log messages and
441
 
                        D-Bus identifiers
442
 
    secret:     bytestring; sent verbatim (over TLS) to client
443
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
444
 
                                      until this client is disabled
445
 
    extended_timeout:   extra long timeout when secret has been sent
446
 
    runtime_expansions: Allowed attributes for runtime expansion.
447
 
    expires:    datetime.datetime(); time (UTC) when a client will be
448
 
                disabled, or None
449
 
    server_settings: The server_settings dict from main()
 
204
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
205
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
450
206
    """
451
 
    
452
 
    runtime_expansions = ("approval_delay", "approval_duration",
453
 
                          "created", "enabled", "expires",
454
 
                          "fingerprint", "host", "interval",
455
 
                          "last_approval_request", "last_checked_ok",
456
 
                          "last_enabled", "name", "timeout")
457
 
    client_defaults = { "timeout": "PT5M",
458
 
                        "extended_timeout": "PT15M",
459
 
                        "interval": "PT2M",
460
 
                        "checker": "fping -q -- %%(host)s",
461
 
                        "host": "",
462
 
                        "approval_delay": "PT0S",
463
 
                        "approval_duration": "PT1S",
464
 
                        "approved_by_default": "True",
465
 
                        "enabled": "True",
466
 
                        }
467
 
    
468
207
    def timeout_milliseconds(self):
469
208
        "Return the 'timeout' attribute in milliseconds"
470
 
        return timedelta_to_milliseconds(self.timeout)
471
 
    
472
 
    def extended_timeout_milliseconds(self):
473
 
        "Return the 'extended_timeout' attribute in milliseconds"
474
 
        return timedelta_to_milliseconds(self.extended_timeout)
 
209
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
210
                + (self.timeout.seconds * 1000)
 
211
                + (self.timeout.microseconds // 1000))
475
212
    
476
213
    def interval_milliseconds(self):
477
214
        "Return the 'interval' attribute in milliseconds"
478
 
        return timedelta_to_milliseconds(self.interval)
479
 
    
480
 
    def approval_delay_milliseconds(self):
481
 
        return timedelta_to_milliseconds(self.approval_delay)
482
 
    
483
 
    @staticmethod
484
 
    def config_parser(config):
485
 
        """Construct a new dict of client settings of this form:
486
 
        { client_name: {setting_name: value, ...}, ...}
487
 
        with exceptions for any special settings as defined above.
488
 
        NOTE: Must be a pure function. Must return the same result
489
 
        value given the same arguments.
490
 
        """
491
 
        settings = {}
492
 
        for client_name in config.sections():
493
 
            section = dict(config.items(client_name))
494
 
            client = settings[client_name] = {}
495
 
            
496
 
            client["host"] = section["host"]
497
 
            # Reformat values from string types to Python types
498
 
            client["approved_by_default"] = config.getboolean(
499
 
                client_name, "approved_by_default")
500
 
            client["enabled"] = config.getboolean(client_name,
501
 
                                                  "enabled")
502
 
            
503
 
            client["fingerprint"] = (section["fingerprint"].upper()
504
 
                                     .replace(" ", ""))
505
 
            if "secret" in section:
506
 
                client["secret"] = section["secret"].decode("base64")
507
 
            elif "secfile" in section:
508
 
                with open(os.path.expanduser(os.path.expandvars
509
 
                                             (section["secfile"])),
510
 
                          "rb") as secfile:
511
 
                    client["secret"] = secfile.read()
512
 
            else:
513
 
                raise TypeError("No secret or secfile for section {0}"
514
 
                                .format(section))
515
 
            client["timeout"] = string_to_delta(section["timeout"])
516
 
            client["extended_timeout"] = string_to_delta(
517
 
                section["extended_timeout"])
518
 
            client["interval"] = string_to_delta(section["interval"])
519
 
            client["approval_delay"] = string_to_delta(
520
 
                section["approval_delay"])
521
 
            client["approval_duration"] = string_to_delta(
522
 
                section["approval_duration"])
523
 
            client["checker_command"] = section["checker"]
524
 
            client["last_approval_request"] = None
525
 
            client["last_checked_ok"] = None
526
 
            client["last_checker_status"] = -2
527
 
        
528
 
        return settings
529
 
    
530
 
    def __init__(self, settings, name = None, server_settings=None):
 
215
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
216
                + (self.interval.seconds * 1000)
 
217
                + (self.interval.microseconds // 1000))
 
218
    
 
219
    def __init__(self, name = None, disable_hook=None, config=None,
 
220
                 use_dbus=True):
 
221
        """Note: the 'checker' key in 'config' sets the
 
222
        'checker_command' attribute and *not* the 'checker'
 
223
        attribute."""
531
224
        self.name = name
532
 
        if server_settings is None:
533
 
            server_settings = {}
534
 
        self.server_settings = server_settings
535
 
        # adding all client settings
536
 
        for setting, value in settings.iteritems():
537
 
            setattr(self, setting, value)
538
 
        
539
 
        if self.enabled:
540
 
            if not hasattr(self, "last_enabled"):
541
 
                self.last_enabled = datetime.datetime.utcnow()
542
 
            if not hasattr(self, "expires"):
543
 
                self.expires = (datetime.datetime.utcnow()
544
 
                                + self.timeout)
545
 
        else:
546
 
            self.last_enabled = None
547
 
            self.expires = None
548
 
        
549
 
        logger.debug("Creating client %r", self.name)
 
225
        if config is None:
 
226
            config = {}
 
227
        logger.debug(u"Creating client %r", self.name)
 
228
        self.use_dbus = use_dbus
 
229
        if self.use_dbus:
 
230
            self.dbus_object_path = (dbus.ObjectPath
 
231
                                     ("/Mandos/clients/"
 
232
                                      + self.name.replace(".", "_")))
 
233
            dbus.service.Object.__init__(self, bus,
 
234
                                         self.dbus_object_path)
550
235
        # Uppercase and remove spaces from fingerprint for later
551
236
        # comparison purposes with return value from the fingerprint()
552
237
        # function
553
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
554
 
        self.created = settings.get("created",
555
 
                                    datetime.datetime.utcnow())
556
 
        
557
 
        # attributes specific for this server instance
 
238
        self.fingerprint = (config["fingerprint"].upper()
 
239
                            .replace(u" ", u""))
 
240
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
 
241
        if "secret" in config:
 
242
            self.secret = config["secret"].decode(u"base64")
 
243
        elif "secfile" in config:
 
244
            with closing(open(os.path.expanduser
 
245
                              (os.path.expandvars
 
246
                               (config["secfile"])))) as secfile:
 
247
                self.secret = secfile.read()
 
248
        else:
 
249
            raise TypeError(u"No secret or secfile for client %s"
 
250
                            % self.name)
 
251
        self.host = config.get("host", "")
 
252
        self.created = datetime.datetime.utcnow()
 
253
        self.enabled = False
 
254
        self.last_enabled = None
 
255
        self.last_checked_ok = None
 
256
        self.timeout = string_to_delta(config["timeout"])
 
257
        self.interval = string_to_delta(config["interval"])
 
258
        self.disable_hook = disable_hook
558
259
        self.checker = None
559
260
        self.checker_initiator_tag = None
560
261
        self.disable_initiator_tag = None
561
262
        self.checker_callback_tag = None
562
 
        self.current_checker_command = None
563
 
        self.approved = None
564
 
        self.approvals_pending = 0
565
 
        self.changedstate = (multiprocessing_manager
566
 
                             .Condition(multiprocessing_manager
567
 
                                        .Lock()))
568
 
        self.client_structure = [attr for attr in
569
 
                                 self.__dict__.iterkeys()
570
 
                                 if not attr.startswith("_")]
571
 
        self.client_structure.append("client_structure")
572
 
        
573
 
        for name, t in inspect.getmembers(type(self),
574
 
                                          lambda obj:
575
 
                                              isinstance(obj,
576
 
                                                         property)):
577
 
            if not name.startswith("_"):
578
 
                self.client_structure.append(name)
579
 
    
580
 
    # Send notice to process children that client state has changed
581
 
    def send_changedstate(self):
582
 
        with self.changedstate:
583
 
            self.changedstate.notify_all()
 
263
        self.checker_command = config["checker"]
584
264
    
585
265
    def enable(self):
586
266
        """Start this client's checker and timeout hooks"""
587
 
        if getattr(self, "enabled", False):
588
 
            # Already enabled
589
 
            return
590
 
        self.expires = datetime.datetime.utcnow() + self.timeout
591
 
        self.enabled = True
592
267
        self.last_enabled = datetime.datetime.utcnow()
593
 
        self.init_checker()
594
 
        self.send_changedstate()
595
 
    
596
 
    def disable(self, quiet=True):
597
 
        """Disable this client."""
598
 
        if not getattr(self, "enabled", False):
599
 
            return False
600
 
        if not quiet:
601
 
            logger.info("Disabling client %s", self.name)
602
 
        if getattr(self, "disable_initiator_tag", None) is not None:
603
 
            gobject.source_remove(self.disable_initiator_tag)
604
 
            self.disable_initiator_tag = None
605
 
        self.expires = None
606
 
        if getattr(self, "checker_initiator_tag", None) is not None:
607
 
            gobject.source_remove(self.checker_initiator_tag)
608
 
            self.checker_initiator_tag = None
609
 
        self.stop_checker()
610
 
        self.enabled = False
611
 
        if not quiet:
612
 
            self.send_changedstate()
613
 
        # Do not run this again if called by a gobject.timeout_add
614
 
        return False
615
 
    
616
 
    def __del__(self):
617
 
        self.disable()
618
 
    
619
 
    def init_checker(self):
620
268
        # Schedule a new checker to be started an 'interval' from now,
621
269
        # and every interval from then on.
622
 
        if self.checker_initiator_tag is not None:
623
 
            gobject.source_remove(self.checker_initiator_tag)
624
270
        self.checker_initiator_tag = (gobject.timeout_add
625
271
                                      (self.interval_milliseconds(),
626
272
                                       self.start_checker))
 
273
        # Also start a new checker *right now*.
 
274
        self.start_checker()
627
275
        # Schedule a disable() when 'timeout' has passed
628
 
        if self.disable_initiator_tag is not None:
629
 
            gobject.source_remove(self.disable_initiator_tag)
630
276
        self.disable_initiator_tag = (gobject.timeout_add
631
277
                                   (self.timeout_milliseconds(),
632
278
                                    self.disable))
633
 
        # Also start a new checker *right now*.
634
 
        self.start_checker()
 
279
        self.enabled = True
 
280
        if self.use_dbus:
 
281
            # Emit D-Bus signals
 
282
            self.PropertyChanged(dbus.String(u"enabled"),
 
283
                                 dbus.Boolean(True, variant_level=1))
 
284
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
285
                                 (_datetime_to_dbus(self.last_enabled,
 
286
                                                    variant_level=1)))
 
287
    
 
288
    def disable(self):
 
289
        """Disable this client."""
 
290
        if not getattr(self, "enabled", False):
 
291
            return False
 
292
        logger.info(u"Disabling client %s", self.name)
 
293
        if getattr(self, "disable_initiator_tag", False):
 
294
            gobject.source_remove(self.disable_initiator_tag)
 
295
            self.disable_initiator_tag = None
 
296
        if getattr(self, "checker_initiator_tag", False):
 
297
            gobject.source_remove(self.checker_initiator_tag)
 
298
            self.checker_initiator_tag = None
 
299
        self.stop_checker()
 
300
        if self.disable_hook:
 
301
            self.disable_hook(self)
 
302
        self.enabled = False
 
303
        if self.use_dbus:
 
304
            # Emit D-Bus signal
 
305
            self.PropertyChanged(dbus.String(u"enabled"),
 
306
                                 dbus.Boolean(False, variant_level=1))
 
307
        # Do not run this again if called by a gobject.timeout_add
 
308
        return False
 
309
    
 
310
    def __del__(self):
 
311
        self.disable_hook = None
 
312
        self.disable()
635
313
    
636
314
    def checker_callback(self, pid, condition, command):
637
315
        """The checker has completed, so take appropriate actions."""
638
316
        self.checker_callback_tag = None
639
317
        self.checker = None
640
 
        if os.WIFEXITED(condition):
641
 
            self.last_checker_status = os.WEXITSTATUS(condition)
642
 
            if self.last_checker_status == 0:
643
 
                logger.info("Checker for %(name)s succeeded",
644
 
                            vars(self))
645
 
                self.checked_ok()
646
 
            else:
647
 
                logger.info("Checker for %(name)s failed",
648
 
                            vars(self))
649
 
        else:
650
 
            self.last_checker_status = -1
651
 
            logger.warning("Checker for %(name)s crashed?",
 
318
        if self.use_dbus:
 
319
            # Emit D-Bus signal
 
320
            self.PropertyChanged(dbus.String(u"checker_running"),
 
321
                                 dbus.Boolean(False, variant_level=1))
 
322
        if (os.WIFEXITED(condition)
 
323
            and (os.WEXITSTATUS(condition) == 0)):
 
324
            logger.info(u"Checker for %(name)s succeeded",
 
325
                        vars(self))
 
326
            if self.use_dbus:
 
327
                # Emit D-Bus signal
 
328
                self.CheckerCompleted(dbus.Boolean(True),
 
329
                                      dbus.UInt16(condition),
 
330
                                      dbus.String(command))
 
331
            self.bump_timeout()
 
332
        elif not os.WIFEXITED(condition):
 
333
            logger.warning(u"Checker for %(name)s crashed?",
652
334
                           vars(self))
 
335
            if self.use_dbus:
 
336
                # Emit D-Bus signal
 
337
                self.CheckerCompleted(dbus.Boolean(False),
 
338
                                      dbus.UInt16(condition),
 
339
                                      dbus.String(command))
 
340
        else:
 
341
            logger.info(u"Checker for %(name)s failed",
 
342
                        vars(self))
 
343
            if self.use_dbus:
 
344
                # Emit D-Bus signal
 
345
                self.CheckerCompleted(dbus.Boolean(False),
 
346
                                      dbus.UInt16(condition),
 
347
                                      dbus.String(command))
653
348
    
654
 
    def checked_ok(self):
655
 
        """Assert that the client has been seen, alive and well."""
 
349
    def bump_timeout(self):
 
350
        """Bump up the timeout for this client.
 
351
        This should only be called when the client has been seen,
 
352
        alive and well.
 
353
        """
656
354
        self.last_checked_ok = datetime.datetime.utcnow()
657
 
        self.last_checker_status = 0
658
 
        self.bump_timeout()
659
 
    
660
 
    def bump_timeout(self, timeout=None):
661
 
        """Bump up the timeout for this client."""
662
 
        if timeout is None:
663
 
            timeout = self.timeout
664
 
        if self.disable_initiator_tag is not None:
665
 
            gobject.source_remove(self.disable_initiator_tag)
666
 
            self.disable_initiator_tag = None
667
 
        if getattr(self, "enabled", False):
668
 
            self.disable_initiator_tag = (gobject.timeout_add
669
 
                                          (timedelta_to_milliseconds
670
 
                                           (timeout), self.disable))
671
 
            self.expires = datetime.datetime.utcnow() + timeout
672
 
    
673
 
    def need_approval(self):
674
 
        self.last_approval_request = datetime.datetime.utcnow()
 
355
        gobject.source_remove(self.disable_initiator_tag)
 
356
        self.disable_initiator_tag = (gobject.timeout_add
 
357
                                      (self.timeout_milliseconds(),
 
358
                                       self.disable))
 
359
        if self.use_dbus:
 
360
            # Emit D-Bus signal
 
361
            self.PropertyChanged(
 
362
                dbus.String(u"last_checked_ok"),
 
363
                (_datetime_to_dbus(self.last_checked_ok,
 
364
                                   variant_level=1)))
675
365
    
676
366
    def start_checker(self):
677
367
        """Start a new checker subprocess if one is not running.
678
 
        
679
368
        If a checker already exists, leave it running and do
680
369
        nothing."""
681
370
        # The reason for not killing a running checker is that if we
682
 
        # did that, and if a checker (for some reason) started running
683
 
        # slowly and taking more than 'interval' time, then the client
684
 
        # would inevitably timeout, since no checker would get a
685
 
        # chance to run to completion.  If we instead leave running
 
371
        # did that, then if a checker (for some reason) started
 
372
        # running slowly and taking more than 'interval' time, the
 
373
        # client would inevitably timeout, since no checker would get
 
374
        # a chance to run to completion.  If we instead leave running
686
375
        # checkers alone, the checker would have to take more time
687
 
        # than 'timeout' for the client to be disabled, which is as it
688
 
        # should be.
689
 
        
690
 
        # If a checker exists, make sure it is not a zombie
691
 
        try:
692
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
693
 
        except (AttributeError, OSError) as error:
694
 
            if (isinstance(error, OSError)
695
 
                and error.errno != errno.ECHILD):
696
 
                raise error
697
 
        else:
698
 
            if pid:
699
 
                logger.warning("Checker was a zombie")
700
 
                gobject.source_remove(self.checker_callback_tag)
701
 
                self.checker_callback(pid, status,
702
 
                                      self.current_checker_command)
703
 
        # Start a new checker if needed
 
376
        # than 'timeout' for the client to be declared invalid, which
 
377
        # is as it should be.
704
378
        if self.checker is None:
705
 
            # Escape attributes for the shell
706
 
            escaped_attrs = dict(
707
 
                (attr, re.escape(unicode(getattr(self, attr))))
708
 
                for attr in
709
 
                self.runtime_expansions)
710
 
            try:
711
 
                command = self.checker_command % escaped_attrs
712
 
            except TypeError as error:
713
 
                logger.error('Could not format string "%s"',
714
 
                             self.checker_command, exc_info=error)
715
 
                return True # Try again later
716
 
            self.current_checker_command = command
717
 
            try:
718
 
                logger.info("Starting checker %r for %s",
 
379
            try:
 
380
                # In case checker_command has exactly one % operator
 
381
                command = self.checker_command % self.host
 
382
            except TypeError:
 
383
                # Escape attributes for the shell
 
384
                escaped_attrs = dict((key, re.escape(str(val)))
 
385
                                     for key, val in
 
386
                                     vars(self).iteritems())
 
387
                try:
 
388
                    command = self.checker_command % escaped_attrs
 
389
                except TypeError, error:
 
390
                    logger.error(u'Could not format string "%s":'
 
391
                                 u' %s', self.checker_command, error)
 
392
                    return True # Try again later
 
393
            try:
 
394
                logger.info(u"Starting checker %r for %s",
719
395
                            command, self.name)
720
396
                # We don't need to redirect stdout and stderr, since
721
397
                # in normal mode, that is already done by daemon(),
722
398
                # and in debug mode we don't want to.  (Stdin is
723
399
                # always replaced by /dev/null.)
724
 
                # The exception is when not debugging but nevertheless
725
 
                # running in the foreground; use the previously
726
 
                # created wnull.
727
 
                popen_args = {}
728
 
                if (not self.server_settings["debug"]
729
 
                    and self.server_settings["foreground"]):
730
 
                    popen_args.update({"stdout": wnull,
731
 
                                       "stderr": wnull })
732
400
                self.checker = subprocess.Popen(command,
733
401
                                                close_fds=True,
734
 
                                                shell=True, cwd="/",
735
 
                                                **popen_args)
736
 
            except OSError as error:
737
 
                logger.error("Failed to start subprocess",
738
 
                             exc_info=error)
739
 
                return True
740
 
            self.checker_callback_tag = (gobject.child_watch_add
741
 
                                         (self.checker.pid,
742
 
                                          self.checker_callback,
743
 
                                          data=command))
744
 
            # The checker may have completed before the gobject
745
 
            # watch was added.  Check for this.
746
 
            try:
747
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
748
 
            except OSError as error:
749
 
                if error.errno == errno.ECHILD:
750
 
                    # This should never happen
751
 
                    logger.error("Child process vanished",
752
 
                                 exc_info=error)
753
 
                    return True
754
 
                raise
755
 
            if pid:
756
 
                gobject.source_remove(self.checker_callback_tag)
757
 
                self.checker_callback(pid, status, command)
 
402
                                                shell=True, cwd="/")
 
403
                if self.use_dbus:
 
404
                    # Emit D-Bus signal
 
405
                    self.CheckerStarted(command)
 
406
                    self.PropertyChanged(
 
407
                        dbus.String("checker_running"),
 
408
                        dbus.Boolean(True, variant_level=1))
 
409
                self.checker_callback_tag = (gobject.child_watch_add
 
410
                                             (self.checker.pid,
 
411
                                              self.checker_callback,
 
412
                                              data=command))
 
413
            except OSError, error:
 
414
                logger.error(u"Failed to start subprocess: %s",
 
415
                             error)
758
416
        # Re-run this periodically if run by gobject.timeout_add
759
417
        return True
760
418
    
765
423
            self.checker_callback_tag = None
766
424
        if getattr(self, "checker", None) is None:
767
425
            return
768
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
426
        logger.debug(u"Stopping checker for %(name)s", vars(self))
769
427
        try:
770
 
            self.checker.terminate()
771
 
            #time.sleep(0.5)
 
428
            os.kill(self.checker.pid, signal.SIGTERM)
 
429
            #os.sleep(0.5)
772
430
            #if self.checker.poll() is None:
773
 
            #    self.checker.kill()
774
 
        except OSError as error:
 
431
            #    os.kill(self.checker.pid, signal.SIGKILL)
 
432
        except OSError, error:
775
433
            if error.errno != errno.ESRCH: # No such process
776
434
                raise
777
435
        self.checker = None
778
 
 
779
 
 
780
 
def dbus_service_property(dbus_interface, signature="v",
781
 
                          access="readwrite", byte_arrays=False):
782
 
    """Decorators for marking methods of a DBusObjectWithProperties to
783
 
    become properties on the D-Bus.
784
 
    
785
 
    The decorated method will be called with no arguments by "Get"
786
 
    and with one argument by "Set".
787
 
    
788
 
    The parameters, where they are supported, are the same as
789
 
    dbus.service.method, except there is only "signature", since the
790
 
    type from Get() and the type sent to Set() is the same.
791
 
    """
792
 
    # Encoding deeply encoded byte arrays is not supported yet by the
793
 
    # "Set" method, so we fail early here:
794
 
    if byte_arrays and signature != "ay":
795
 
        raise ValueError("Byte arrays not supported for non-'ay'"
796
 
                         " signature {0!r}".format(signature))
797
 
    def decorator(func):
798
 
        func._dbus_is_property = True
799
 
        func._dbus_interface = dbus_interface
800
 
        func._dbus_signature = signature
801
 
        func._dbus_access = access
802
 
        func._dbus_name = func.__name__
803
 
        if func._dbus_name.endswith("_dbus_property"):
804
 
            func._dbus_name = func._dbus_name[:-14]
805
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
806
 
        return func
807
 
    return decorator
808
 
 
809
 
 
810
 
def dbus_interface_annotations(dbus_interface):
811
 
    """Decorator for marking functions returning interface annotations
812
 
    
813
 
    Usage:
814
 
    
815
 
    @dbus_interface_annotations("org.example.Interface")
816
 
    def _foo(self):  # Function name does not matter
817
 
        return {"org.freedesktop.DBus.Deprecated": "true",
818
 
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
819
 
                    "false"}
820
 
    """
821
 
    def decorator(func):
822
 
        func._dbus_is_interface = True
823
 
        func._dbus_interface = dbus_interface
824
 
        func._dbus_name = dbus_interface
825
 
        return func
826
 
    return decorator
827
 
 
828
 
 
829
 
def dbus_annotations(annotations):
830
 
    """Decorator to annotate D-Bus methods, signals or properties
831
 
    Usage:
832
 
    
833
 
    @dbus_service_property("org.example.Interface", signature="b",
834
 
                           access="r")
835
 
    @dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",
836
 
                        "org.freedesktop.DBus.Property."
837
 
                        "EmitsChangedSignal": "false"})
838
 
    def Property_dbus_property(self):
839
 
        return dbus.Boolean(False)
840
 
    """
841
 
    def decorator(func):
842
 
        func._dbus_annotations = annotations
843
 
        return func
844
 
    return decorator
845
 
 
846
 
 
847
 
class DBusPropertyException(dbus.exceptions.DBusException):
848
 
    """A base class for D-Bus property-related exceptions
849
 
    """
850
 
    def __unicode__(self):
851
 
        return unicode(str(self))
852
 
 
853
 
 
854
 
class DBusPropertyAccessException(DBusPropertyException):
855
 
    """A property's access permissions disallows an operation.
856
 
    """
857
 
    pass
858
 
 
859
 
 
860
 
class DBusPropertyNotFound(DBusPropertyException):
861
 
    """An attempt was made to access a non-existing property.
862
 
    """
863
 
    pass
864
 
 
865
 
 
866
 
class DBusObjectWithProperties(dbus.service.Object):
867
 
    """A D-Bus object with properties.
868
 
    
869
 
    Classes inheriting from this can use the dbus_service_property
870
 
    decorator to expose methods as D-Bus properties.  It exposes the
871
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
872
 
    """
873
 
    
874
 
    @staticmethod
875
 
    def _is_dbus_thing(thing):
876
 
        """Returns a function testing if an attribute is a D-Bus thing
877
 
        
878
 
        If called like _is_dbus_thing("method") it returns a function
879
 
        suitable for use as predicate to inspect.getmembers().
880
 
        """
881
 
        return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),
882
 
                                   False)
883
 
    
884
 
    def _get_all_dbus_things(self, thing):
885
 
        """Returns a generator of (name, attribute) pairs
886
 
        """
887
 
        return ((getattr(athing.__get__(self), "_dbus_name",
888
 
                         name),
889
 
                 athing.__get__(self))
890
 
                for cls in self.__class__.__mro__
891
 
                for name, athing in
892
 
                inspect.getmembers(cls,
893
 
                                   self._is_dbus_thing(thing)))
894
 
    
895
 
    def _get_dbus_property(self, interface_name, property_name):
896
 
        """Returns a bound method if one exists which is a D-Bus
897
 
        property with the specified name and interface.
898
 
        """
899
 
        for cls in  self.__class__.__mro__:
900
 
            for name, value in (inspect.getmembers
901
 
                                (cls,
902
 
                                 self._is_dbus_thing("property"))):
903
 
                if (value._dbus_name == property_name
904
 
                    and value._dbus_interface == interface_name):
905
 
                    return value.__get__(self)
906
 
        
907
 
        # No such property
908
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
909
 
                                   + interface_name + "."
910
 
                                   + property_name)
911
 
    
912
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
913
 
                         out_signature="v")
914
 
    def Get(self, interface_name, property_name):
915
 
        """Standard D-Bus property Get() method, see D-Bus standard.
916
 
        """
917
 
        prop = self._get_dbus_property(interface_name, property_name)
918
 
        if prop._dbus_access == "write":
919
 
            raise DBusPropertyAccessException(property_name)
920
 
        value = prop()
921
 
        if not hasattr(value, "variant_level"):
922
 
            return value
923
 
        return type(value)(value, variant_level=value.variant_level+1)
924
 
    
925
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
926
 
    def Set(self, interface_name, property_name, value):
927
 
        """Standard D-Bus property Set() method, see D-Bus standard.
928
 
        """
929
 
        prop = self._get_dbus_property(interface_name, property_name)
930
 
        if prop._dbus_access == "read":
931
 
            raise DBusPropertyAccessException(property_name)
932
 
        if prop._dbus_get_args_options["byte_arrays"]:
933
 
            # The byte_arrays option is not supported yet on
934
 
            # signatures other than "ay".
935
 
            if prop._dbus_signature != "ay":
936
 
                raise ValueError
937
 
            value = dbus.ByteArray(b''.join(chr(byte)
938
 
                                            for byte in value))
939
 
        prop(value)
940
 
    
941
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
942
 
                         out_signature="a{sv}")
943
 
    def GetAll(self, interface_name):
944
 
        """Standard D-Bus property GetAll() method, see D-Bus
945
 
        standard.
946
 
        
947
 
        Note: Will not include properties with access="write".
948
 
        """
949
 
        properties = {}
950
 
        for name, prop in self._get_all_dbus_things("property"):
951
 
            if (interface_name
952
 
                and interface_name != prop._dbus_interface):
953
 
                # Interface non-empty but did not match
954
 
                continue
955
 
            # Ignore write-only properties
956
 
            if prop._dbus_access == "write":
957
 
                continue
958
 
            value = prop()
959
 
            if not hasattr(value, "variant_level"):
960
 
                properties[name] = value
961
 
                continue
962
 
            properties[name] = type(value)(value, variant_level=
963
 
                                           value.variant_level+1)
964
 
        return dbus.Dictionary(properties, signature="sv")
965
 
    
966
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
967
 
                         out_signature="s",
968
 
                         path_keyword='object_path',
969
 
                         connection_keyword='connection')
970
 
    def Introspect(self, object_path, connection):
971
 
        """Overloading of standard D-Bus method.
972
 
        
973
 
        Inserts property tags and interface annotation tags.
974
 
        """
975
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
976
 
                                                   connection)
977
 
        try:
978
 
            document = xml.dom.minidom.parseString(xmlstring)
979
 
            def make_tag(document, name, prop):
980
 
                e = document.createElement("property")
981
 
                e.setAttribute("name", name)
982
 
                e.setAttribute("type", prop._dbus_signature)
983
 
                e.setAttribute("access", prop._dbus_access)
984
 
                return e
985
 
            for if_tag in document.getElementsByTagName("interface"):
986
 
                # Add property tags
987
 
                for tag in (make_tag(document, name, prop)
988
 
                            for name, prop
989
 
                            in self._get_all_dbus_things("property")
990
 
                            if prop._dbus_interface
991
 
                            == if_tag.getAttribute("name")):
992
 
                    if_tag.appendChild(tag)
993
 
                # Add annotation tags
994
 
                for typ in ("method", "signal", "property"):
995
 
                    for tag in if_tag.getElementsByTagName(typ):
996
 
                        annots = dict()
997
 
                        for name, prop in (self.
998
 
                                           _get_all_dbus_things(typ)):
999
 
                            if (name == tag.getAttribute("name")
1000
 
                                and prop._dbus_interface
1001
 
                                == if_tag.getAttribute("name")):
1002
 
                                annots.update(getattr
1003
 
                                              (prop,
1004
 
                                               "_dbus_annotations",
1005
 
                                               {}))
1006
 
                        for name, value in annots.iteritems():
1007
 
                            ann_tag = document.createElement(
1008
 
                                "annotation")
1009
 
                            ann_tag.setAttribute("name", name)
1010
 
                            ann_tag.setAttribute("value", value)
1011
 
                            tag.appendChild(ann_tag)
1012
 
                # Add interface annotation tags
1013
 
                for annotation, value in dict(
1014
 
                    itertools.chain.from_iterable(
1015
 
                        annotations().iteritems()
1016
 
                        for name, annotations in
1017
 
                        self._get_all_dbus_things("interface")
1018
 
                        if name == if_tag.getAttribute("name")
1019
 
                        )).iteritems():
1020
 
                    ann_tag = document.createElement("annotation")
1021
 
                    ann_tag.setAttribute("name", annotation)
1022
 
                    ann_tag.setAttribute("value", value)
1023
 
                    if_tag.appendChild(ann_tag)
1024
 
                # Add the names to the return values for the
1025
 
                # "org.freedesktop.DBus.Properties" methods
1026
 
                if (if_tag.getAttribute("name")
1027
 
                    == "org.freedesktop.DBus.Properties"):
1028
 
                    for cn in if_tag.getElementsByTagName("method"):
1029
 
                        if cn.getAttribute("name") == "Get":
1030
 
                            for arg in cn.getElementsByTagName("arg"):
1031
 
                                if (arg.getAttribute("direction")
1032
 
                                    == "out"):
1033
 
                                    arg.setAttribute("name", "value")
1034
 
                        elif cn.getAttribute("name") == "GetAll":
1035
 
                            for arg in cn.getElementsByTagName("arg"):
1036
 
                                if (arg.getAttribute("direction")
1037
 
                                    == "out"):
1038
 
                                    arg.setAttribute("name", "props")
1039
 
            xmlstring = document.toxml("utf-8")
1040
 
            document.unlink()
1041
 
        except (AttributeError, xml.dom.DOMException,
1042
 
                xml.parsers.expat.ExpatError) as error:
1043
 
            logger.error("Failed to override Introspection method",
1044
 
                         exc_info=error)
1045
 
        return xmlstring
1046
 
 
1047
 
 
1048
 
def datetime_to_dbus(dt, variant_level=0):
1049
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1050
 
    if dt is None:
1051
 
        return dbus.String("", variant_level = variant_level)
1052
 
    return dbus.String(dt.isoformat(),
1053
 
                       variant_level=variant_level)
1054
 
 
1055
 
 
1056
 
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
1057
 
    """A class decorator; applied to a subclass of
1058
 
    dbus.service.Object, it will add alternate D-Bus attributes with
1059
 
    interface names according to the "alt_interface_names" mapping.
1060
 
    Usage:
1061
 
    
1062
 
    @alternate_dbus_interfaces({"org.example.Interface":
1063
 
                                    "net.example.AlternateInterface"})
1064
 
    class SampleDBusObject(dbus.service.Object):
1065
 
        @dbus.service.method("org.example.Interface")
1066
 
        def SampleDBusMethod():
1067
 
            pass
1068
 
    
1069
 
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1070
 
    reachable via two interfaces: "org.example.Interface" and
1071
 
    "net.example.AlternateInterface", the latter of which will have
1072
 
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1073
 
    "true", unless "deprecate" is passed with a False value.
1074
 
    
1075
 
    This works for methods and signals, and also for D-Bus properties
1076
 
    (from DBusObjectWithProperties) and interfaces (from the
1077
 
    dbus_interface_annotations decorator).
1078
 
    """
1079
 
    def wrapper(cls):
1080
 
        for orig_interface_name, alt_interface_name in (
1081
 
            alt_interface_names.iteritems()):
1082
 
            attr = {}
1083
 
            interface_names = set()
1084
 
            # Go though all attributes of the class
1085
 
            for attrname, attribute in inspect.getmembers(cls):
1086
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
1087
 
                # with the wrong interface name
1088
 
                if (not hasattr(attribute, "_dbus_interface")
1089
 
                    or not attribute._dbus_interface
1090
 
                    .startswith(orig_interface_name)):
1091
 
                    continue
1092
 
                # Create an alternate D-Bus interface name based on
1093
 
                # the current name
1094
 
                alt_interface = (attribute._dbus_interface
1095
 
                                 .replace(orig_interface_name,
1096
 
                                          alt_interface_name))
1097
 
                interface_names.add(alt_interface)
1098
 
                # Is this a D-Bus signal?
1099
 
                if getattr(attribute, "_dbus_is_signal", False):
1100
 
                    # Extract the original non-method undecorated
1101
 
                    # function by black magic
1102
 
                    nonmethod_func = (dict(
1103
 
                            zip(attribute.func_code.co_freevars,
1104
 
                                attribute.__closure__))["func"]
1105
 
                                      .cell_contents)
1106
 
                    # Create a new, but exactly alike, function
1107
 
                    # object, and decorate it to be a new D-Bus signal
1108
 
                    # with the alternate D-Bus interface name
1109
 
                    new_function = (dbus.service.signal
1110
 
                                    (alt_interface,
1111
 
                                     attribute._dbus_signature)
1112
 
                                    (types.FunctionType(
1113
 
                                nonmethod_func.func_code,
1114
 
                                nonmethod_func.func_globals,
1115
 
                                nonmethod_func.func_name,
1116
 
                                nonmethod_func.func_defaults,
1117
 
                                nonmethod_func.func_closure)))
1118
 
                    # Copy annotations, if any
1119
 
                    try:
1120
 
                        new_function._dbus_annotations = (
1121
 
                            dict(attribute._dbus_annotations))
1122
 
                    except AttributeError:
1123
 
                        pass
1124
 
                    # Define a creator of a function to call both the
1125
 
                    # original and alternate functions, so both the
1126
 
                    # original and alternate signals gets sent when
1127
 
                    # the function is called
1128
 
                    def fixscope(func1, func2):
1129
 
                        """This function is a scope container to pass
1130
 
                        func1 and func2 to the "call_both" function
1131
 
                        outside of its arguments"""
1132
 
                        def call_both(*args, **kwargs):
1133
 
                            """This function will emit two D-Bus
1134
 
                            signals by calling func1 and func2"""
1135
 
                            func1(*args, **kwargs)
1136
 
                            func2(*args, **kwargs)
1137
 
                        return call_both
1138
 
                    # Create the "call_both" function and add it to
1139
 
                    # the class
1140
 
                    attr[attrname] = fixscope(attribute, new_function)
1141
 
                # Is this a D-Bus method?
1142
 
                elif getattr(attribute, "_dbus_is_method", False):
1143
 
                    # Create a new, but exactly alike, function
1144
 
                    # object.  Decorate it to be a new D-Bus method
1145
 
                    # with the alternate D-Bus interface name.  Add it
1146
 
                    # to the class.
1147
 
                    attr[attrname] = (dbus.service.method
1148
 
                                      (alt_interface,
1149
 
                                       attribute._dbus_in_signature,
1150
 
                                       attribute._dbus_out_signature)
1151
 
                                      (types.FunctionType
1152
 
                                       (attribute.func_code,
1153
 
                                        attribute.func_globals,
1154
 
                                        attribute.func_name,
1155
 
                                        attribute.func_defaults,
1156
 
                                        attribute.func_closure)))
1157
 
                    # Copy annotations, if any
1158
 
                    try:
1159
 
                        attr[attrname]._dbus_annotations = (
1160
 
                            dict(attribute._dbus_annotations))
1161
 
                    except AttributeError:
1162
 
                        pass
1163
 
                # Is this a D-Bus property?
1164
 
                elif getattr(attribute, "_dbus_is_property", False):
1165
 
                    # Create a new, but exactly alike, function
1166
 
                    # object, and decorate it to be a new D-Bus
1167
 
                    # property with the alternate D-Bus interface
1168
 
                    # name.  Add it to the class.
1169
 
                    attr[attrname] = (dbus_service_property
1170
 
                                      (alt_interface,
1171
 
                                       attribute._dbus_signature,
1172
 
                                       attribute._dbus_access,
1173
 
                                       attribute
1174
 
                                       ._dbus_get_args_options
1175
 
                                       ["byte_arrays"])
1176
 
                                      (types.FunctionType
1177
 
                                       (attribute.func_code,
1178
 
                                        attribute.func_globals,
1179
 
                                        attribute.func_name,
1180
 
                                        attribute.func_defaults,
1181
 
                                        attribute.func_closure)))
1182
 
                    # Copy annotations, if any
1183
 
                    try:
1184
 
                        attr[attrname]._dbus_annotations = (
1185
 
                            dict(attribute._dbus_annotations))
1186
 
                    except AttributeError:
1187
 
                        pass
1188
 
                # Is this a D-Bus interface?
1189
 
                elif getattr(attribute, "_dbus_is_interface", False):
1190
 
                    # Create a new, but exactly alike, function
1191
 
                    # object.  Decorate it to be a new D-Bus interface
1192
 
                    # with the alternate D-Bus interface name.  Add it
1193
 
                    # to the class.
1194
 
                    attr[attrname] = (dbus_interface_annotations
1195
 
                                      (alt_interface)
1196
 
                                      (types.FunctionType
1197
 
                                       (attribute.func_code,
1198
 
                                        attribute.func_globals,
1199
 
                                        attribute.func_name,
1200
 
                                        attribute.func_defaults,
1201
 
                                        attribute.func_closure)))
1202
 
            if deprecate:
1203
 
                # Deprecate all alternate interfaces
1204
 
                iname="_AlternateDBusNames_interface_annotation{0}"
1205
 
                for interface_name in interface_names:
1206
 
                    @dbus_interface_annotations(interface_name)
1207
 
                    def func(self):
1208
 
                        return { "org.freedesktop.DBus.Deprecated":
1209
 
                                     "true" }
1210
 
                    # Find an unused name
1211
 
                    for aname in (iname.format(i)
1212
 
                                  for i in itertools.count()):
1213
 
                        if aname not in attr:
1214
 
                            attr[aname] = func
1215
 
                            break
1216
 
            if interface_names:
1217
 
                # Replace the class with a new subclass of it with
1218
 
                # methods, signals, etc. as created above.
1219
 
                cls = type(b"{0}Alternate".format(cls.__name__),
1220
 
                           (cls,), attr)
1221
 
        return cls
1222
 
    return wrapper
1223
 
 
1224
 
 
1225
 
@alternate_dbus_interfaces({"se.recompile.Mandos":
1226
 
                                "se.bsnet.fukt.Mandos"})
1227
 
class ClientDBus(Client, DBusObjectWithProperties):
1228
 
    """A Client class using D-Bus
1229
 
    
1230
 
    Attributes:
1231
 
    dbus_object_path: dbus.ObjectPath
1232
 
    bus: dbus.SystemBus()
1233
 
    """
1234
 
    
1235
 
    runtime_expansions = (Client.runtime_expansions
1236
 
                          + ("dbus_object_path",))
1237
 
    
1238
 
    # dbus.service.Object doesn't use super(), so we can't either.
1239
 
    
1240
 
    def __init__(self, bus = None, *args, **kwargs):
1241
 
        self.bus = bus
1242
 
        Client.__init__(self, *args, **kwargs)
1243
 
        # Only now, when this client is initialized, can it show up on
1244
 
        # the D-Bus
1245
 
        client_object_name = unicode(self.name).translate(
1246
 
            {ord("."): ord("_"),
1247
 
             ord("-"): ord("_")})
1248
 
        self.dbus_object_path = (dbus.ObjectPath
1249
 
                                 ("/clients/" + client_object_name))
1250
 
        DBusObjectWithProperties.__init__(self, self.bus,
1251
 
                                          self.dbus_object_path)
1252
 
    
1253
 
    def notifychangeproperty(transform_func,
1254
 
                             dbus_name, type_func=lambda x: x,
1255
 
                             variant_level=1):
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 = "_{0}".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
 
                    dbus_value = transform_func(type_func(value),
1273
 
                                                variant_level
1274
 
                                                =variant_level)
1275
 
                    self.PropertyChanged(dbus.String(dbus_name),
1276
 
                                         dbus_value)
1277
 
            setattr(self, attrname, value)
1278
 
        
1279
 
        return property(lambda self: getattr(self, attrname), setter)
1280
 
    
1281
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1282
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1283
 
                                             "ApprovalPending",
1284
 
                                             type_func = bool)
1285
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1286
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1287
 
                                        "LastEnabled")
1288
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1289
 
                                   type_func = lambda checker:
1290
 
                                       checker is not None)
1291
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1292
 
                                           "LastCheckedOK")
1293
 
    last_checker_status = notifychangeproperty(dbus.Int16,
1294
 
                                               "LastCheckerStatus")
1295
 
    last_approval_request = notifychangeproperty(
1296
 
        datetime_to_dbus, "LastApprovalRequest")
1297
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1298
 
                                               "ApprovedByDefault")
1299
 
    approval_delay = notifychangeproperty(dbus.UInt64,
1300
 
                                          "ApprovalDelay",
1301
 
                                          type_func =
1302
 
                                          timedelta_to_milliseconds)
1303
 
    approval_duration = notifychangeproperty(
1304
 
        dbus.UInt64, "ApprovalDuration",
1305
 
        type_func = timedelta_to_milliseconds)
1306
 
    host = notifychangeproperty(dbus.String, "Host")
1307
 
    timeout = notifychangeproperty(dbus.UInt64, "Timeout",
1308
 
                                   type_func =
1309
 
                                   timedelta_to_milliseconds)
1310
 
    extended_timeout = notifychangeproperty(
1311
 
        dbus.UInt64, "ExtendedTimeout",
1312
 
        type_func = timedelta_to_milliseconds)
1313
 
    interval = notifychangeproperty(dbus.UInt64,
1314
 
                                    "Interval",
1315
 
                                    type_func =
1316
 
                                    timedelta_to_milliseconds)
1317
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1318
 
    
1319
 
    del notifychangeproperty
1320
 
    
1321
 
    def __del__(self, *args, **kwargs):
1322
 
        try:
1323
 
            self.remove_from_connection()
1324
 
        except LookupError:
1325
 
            pass
1326
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1327
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1328
 
        Client.__del__(self, *args, **kwargs)
1329
 
    
1330
 
    def checker_callback(self, pid, condition, command,
1331
 
                         *args, **kwargs):
1332
 
        self.checker_callback_tag = None
1333
 
        self.checker = None
1334
 
        if os.WIFEXITED(condition):
1335
 
            exitstatus = os.WEXITSTATUS(condition)
1336
 
            # Emit D-Bus signal
1337
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1338
 
                                  dbus.Int64(condition),
1339
 
                                  dbus.String(command))
1340
 
        else:
1341
 
            # Emit D-Bus signal
1342
 
            self.CheckerCompleted(dbus.Int16(-1),
1343
 
                                  dbus.Int64(condition),
1344
 
                                  dbus.String(command))
1345
 
        
1346
 
        return Client.checker_callback(self, pid, condition, command,
1347
 
                                       *args, **kwargs)
1348
 
    
1349
 
    def start_checker(self, *args, **kwargs):
1350
 
        old_checker = self.checker
1351
 
        if self.checker is not None:
1352
 
            old_checker_pid = self.checker.pid
1353
 
        else:
1354
 
            old_checker_pid = None
1355
 
        r = Client.start_checker(self, *args, **kwargs)
1356
 
        # Only if new checker process was started
1357
 
        if (self.checker is not None
1358
 
            and old_checker_pid != self.checker.pid):
1359
 
            # Emit D-Bus signal
1360
 
            self.CheckerStarted(self.current_checker_command)
1361
 
        return r
1362
 
    
1363
 
    def _reset_approved(self):
1364
 
        self.approved = None
1365
 
        return False
1366
 
    
1367
 
    def approve(self, value=True):
1368
 
        self.approved = value
1369
 
        gobject.timeout_add(timedelta_to_milliseconds
1370
 
                            (self.approval_duration),
1371
 
                            self._reset_approved)
1372
 
        self.send_changedstate()
1373
 
    
1374
 
    ## D-Bus methods, signals & properties
1375
 
    _interface = "se.recompile.Mandos.Client"
1376
 
    
1377
 
    ## Interfaces
1378
 
    
1379
 
    @dbus_interface_annotations(_interface)
1380
 
    def _foo(self):
1381
 
        return { "org.freedesktop.DBus.Property.EmitsChangedSignal":
1382
 
                     "false"}
1383
 
    
1384
 
    ## Signals
 
436
        if self.use_dbus:
 
437
            self.PropertyChanged(dbus.String(u"checker_running"),
 
438
                                 dbus.Boolean(False, variant_level=1))
 
439
    
 
440
    def still_valid(self):
 
441
        """Has the timeout not yet passed for this client?"""
 
442
        if not getattr(self, "enabled", False):
 
443
            return False
 
444
        now = datetime.datetime.utcnow()
 
445
        if self.last_checked_ok is None:
 
446
            return now < (self.created + self.timeout)
 
447
        else:
 
448
            return now < (self.last_checked_ok + self.timeout)
 
449
    
 
450
    ## D-Bus methods & signals
 
451
    _interface = u"org.mandos_system.Mandos.Client"
 
452
    
 
453
    # BumpTimeout - method
 
454
    BumpTimeout = dbus.service.method(_interface)(bump_timeout)
 
455
    BumpTimeout.__name__ = "BumpTimeout"
1385
456
    
1386
457
    # CheckerCompleted - signal
1387
 
    @dbus.service.signal(_interface, signature="nxs")
1388
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
458
    @dbus.service.signal(_interface, signature="bqs")
 
459
    def CheckerCompleted(self, success, condition, command):
1389
460
        "D-Bus signal"
1390
461
        pass
1391
462
    
1395
466
        "D-Bus signal"
1396
467
        pass
1397
468
    
 
469
    # GetAllProperties - method
 
470
    @dbus.service.method(_interface, out_signature="a{sv}")
 
471
    def GetAllProperties(self):
 
472
        "D-Bus method"
 
473
        return dbus.Dictionary({
 
474
                dbus.String("name"):
 
475
                    dbus.String(self.name, variant_level=1),
 
476
                dbus.String("fingerprint"):
 
477
                    dbus.String(self.fingerprint, variant_level=1),
 
478
                dbus.String("host"):
 
479
                    dbus.String(self.host, variant_level=1),
 
480
                dbus.String("created"):
 
481
                    _datetime_to_dbus(self.created, variant_level=1),
 
482
                dbus.String("last_enabled"):
 
483
                    (_datetime_to_dbus(self.last_enabled,
 
484
                                       variant_level=1)
 
485
                     if self.last_enabled is not None
 
486
                     else dbus.Boolean(False, variant_level=1)),
 
487
                dbus.String("enabled"):
 
488
                    dbus.Boolean(self.enabled, variant_level=1),
 
489
                dbus.String("last_checked_ok"):
 
490
                    (_datetime_to_dbus(self.last_checked_ok,
 
491
                                       variant_level=1)
 
492
                     if self.last_checked_ok is not None
 
493
                     else dbus.Boolean (False, variant_level=1)),
 
494
                dbus.String("timeout"):
 
495
                    dbus.UInt64(self.timeout_milliseconds(),
 
496
                                variant_level=1),
 
497
                dbus.String("interval"):
 
498
                    dbus.UInt64(self.interval_milliseconds(),
 
499
                                variant_level=1),
 
500
                dbus.String("checker"):
 
501
                    dbus.String(self.checker_command,
 
502
                                variant_level=1),
 
503
                dbus.String("checker_running"):
 
504
                    dbus.Boolean(self.checker is not None,
 
505
                                 variant_level=1),
 
506
                }, signature="sv")
 
507
    
 
508
    # IsStillValid - method
 
509
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
510
                    (still_valid))
 
511
    IsStillValid.__name__ = "IsStillValid"
 
512
    
1398
513
    # PropertyChanged - signal
1399
514
    @dbus.service.signal(_interface, signature="sv")
1400
515
    def PropertyChanged(self, property, value):
1401
516
        "D-Bus signal"
1402
517
        pass
1403
518
    
1404
 
    # GotSecret - signal
1405
 
    @dbus.service.signal(_interface)
1406
 
    def GotSecret(self):
1407
 
        """D-Bus signal
1408
 
        Is sent after a successful transfer of secret from the Mandos
1409
 
        server to mandos-client
1410
 
        """
1411
 
        pass
1412
 
    
1413
 
    # Rejected - signal
1414
 
    @dbus.service.signal(_interface, signature="s")
1415
 
    def Rejected(self, reason):
1416
 
        "D-Bus signal"
1417
 
        pass
1418
 
    
1419
 
    # NeedApproval - signal
1420
 
    @dbus.service.signal(_interface, signature="tb")
1421
 
    def NeedApproval(self, timeout, default):
1422
 
        "D-Bus signal"
1423
 
        return self.need_approval()
1424
 
    
1425
 
    ## Methods
1426
 
    
1427
 
    # Approve - method
1428
 
    @dbus.service.method(_interface, in_signature="b")
1429
 
    def Approve(self, value):
1430
 
        self.approve(value)
1431
 
    
1432
 
    # CheckedOK - method
1433
 
    @dbus.service.method(_interface)
1434
 
    def CheckedOK(self):
1435
 
        self.checked_ok()
 
519
    # SetChecker - method
 
520
    @dbus.service.method(_interface, in_signature="s")
 
521
    def SetChecker(self, checker):
 
522
        "D-Bus setter method"
 
523
        self.checker_command = checker
 
524
        # Emit D-Bus signal
 
525
        self.PropertyChanged(dbus.String(u"checker"),
 
526
                             dbus.String(self.checker_command,
 
527
                                         variant_level=1))
 
528
    
 
529
    # SetHost - method
 
530
    @dbus.service.method(_interface, in_signature="s")
 
531
    def SetHost(self, host):
 
532
        "D-Bus setter method"
 
533
        self.host = host
 
534
        # Emit D-Bus signal
 
535
        self.PropertyChanged(dbus.String(u"host"),
 
536
                             dbus.String(self.host, variant_level=1))
 
537
    
 
538
    # SetInterval - method
 
539
    @dbus.service.method(_interface, in_signature="t")
 
540
    def SetInterval(self, milliseconds):
 
541
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
542
        # Emit D-Bus signal
 
543
        self.PropertyChanged(dbus.String(u"interval"),
 
544
                             (dbus.UInt64(self.interval_milliseconds(),
 
545
                                          variant_level=1)))
 
546
    
 
547
    # SetSecret - method
 
548
    @dbus.service.method(_interface, in_signature="ay",
 
549
                         byte_arrays=True)
 
550
    def SetSecret(self, secret):
 
551
        "D-Bus setter method"
 
552
        self.secret = str(secret)
 
553
    
 
554
    # SetTimeout - method
 
555
    @dbus.service.method(_interface, in_signature="t")
 
556
    def SetTimeout(self, milliseconds):
 
557
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
558
        # Emit D-Bus signal
 
559
        self.PropertyChanged(dbus.String(u"timeout"),
 
560
                             (dbus.UInt64(self.timeout_milliseconds(),
 
561
                                          variant_level=1)))
1436
562
    
1437
563
    # Enable - method
1438
 
    @dbus.service.method(_interface)
1439
 
    def Enable(self):
1440
 
        "D-Bus method"
1441
 
        self.enable()
 
564
    Enable = dbus.service.method(_interface)(enable)
 
565
    Enable.__name__ = "Enable"
1442
566
    
1443
567
    # StartChecker - method
1444
568
    @dbus.service.method(_interface)
1453
577
        self.disable()
1454
578
    
1455
579
    # StopChecker - method
1456
 
    @dbus.service.method(_interface)
1457
 
    def StopChecker(self):
1458
 
        self.stop_checker()
1459
 
    
1460
 
    ## Properties
1461
 
    
1462
 
    # ApprovalPending - property
1463
 
    @dbus_service_property(_interface, signature="b", access="read")
1464
 
    def ApprovalPending_dbus_property(self):
1465
 
        return dbus.Boolean(bool(self.approvals_pending))
1466
 
    
1467
 
    # ApprovedByDefault - property
1468
 
    @dbus_service_property(_interface, signature="b",
1469
 
                           access="readwrite")
1470
 
    def ApprovedByDefault_dbus_property(self, value=None):
1471
 
        if value is None:       # get
1472
 
            return dbus.Boolean(self.approved_by_default)
1473
 
        self.approved_by_default = bool(value)
1474
 
    
1475
 
    # ApprovalDelay - property
1476
 
    @dbus_service_property(_interface, signature="t",
1477
 
                           access="readwrite")
1478
 
    def ApprovalDelay_dbus_property(self, value=None):
1479
 
        if value is None:       # get
1480
 
            return dbus.UInt64(self.approval_delay_milliseconds())
1481
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1482
 
    
1483
 
    # ApprovalDuration - property
1484
 
    @dbus_service_property(_interface, signature="t",
1485
 
                           access="readwrite")
1486
 
    def ApprovalDuration_dbus_property(self, value=None):
1487
 
        if value is None:       # get
1488
 
            return dbus.UInt64(timedelta_to_milliseconds(
1489
 
                    self.approval_duration))
1490
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1491
 
    
1492
 
    # Name - property
1493
 
    @dbus_service_property(_interface, signature="s", access="read")
1494
 
    def Name_dbus_property(self):
1495
 
        return dbus.String(self.name)
1496
 
    
1497
 
    # Fingerprint - property
1498
 
    @dbus_service_property(_interface, signature="s", access="read")
1499
 
    def Fingerprint_dbus_property(self):
1500
 
        return dbus.String(self.fingerprint)
1501
 
    
1502
 
    # Host - property
1503
 
    @dbus_service_property(_interface, signature="s",
1504
 
                           access="readwrite")
1505
 
    def Host_dbus_property(self, value=None):
1506
 
        if value is None:       # get
1507
 
            return dbus.String(self.host)
1508
 
        self.host = unicode(value)
1509
 
    
1510
 
    # Created - property
1511
 
    @dbus_service_property(_interface, signature="s", access="read")
1512
 
    def Created_dbus_property(self):
1513
 
        return datetime_to_dbus(self.created)
1514
 
    
1515
 
    # LastEnabled - property
1516
 
    @dbus_service_property(_interface, signature="s", access="read")
1517
 
    def LastEnabled_dbus_property(self):
1518
 
        return datetime_to_dbus(self.last_enabled)
1519
 
    
1520
 
    # Enabled - property
1521
 
    @dbus_service_property(_interface, signature="b",
1522
 
                           access="readwrite")
1523
 
    def Enabled_dbus_property(self, value=None):
1524
 
        if value is None:       # get
1525
 
            return dbus.Boolean(self.enabled)
1526
 
        if value:
1527
 
            self.enable()
1528
 
        else:
1529
 
            self.disable()
1530
 
    
1531
 
    # LastCheckedOK - property
1532
 
    @dbus_service_property(_interface, signature="s",
1533
 
                           access="readwrite")
1534
 
    def LastCheckedOK_dbus_property(self, value=None):
1535
 
        if value is not None:
1536
 
            self.checked_ok()
1537
 
            return
1538
 
        return datetime_to_dbus(self.last_checked_ok)
1539
 
    
1540
 
    # LastCheckerStatus - property
1541
 
    @dbus_service_property(_interface, signature="n",
1542
 
                           access="read")
1543
 
    def LastCheckerStatus_dbus_property(self):
1544
 
        return dbus.Int16(self.last_checker_status)
1545
 
    
1546
 
    # Expires - property
1547
 
    @dbus_service_property(_interface, signature="s", access="read")
1548
 
    def Expires_dbus_property(self):
1549
 
        return datetime_to_dbus(self.expires)
1550
 
    
1551
 
    # LastApprovalRequest - property
1552
 
    @dbus_service_property(_interface, signature="s", access="read")
1553
 
    def LastApprovalRequest_dbus_property(self):
1554
 
        return datetime_to_dbus(self.last_approval_request)
1555
 
    
1556
 
    # Timeout - property
1557
 
    @dbus_service_property(_interface, signature="t",
1558
 
                           access="readwrite")
1559
 
    def Timeout_dbus_property(self, value=None):
1560
 
        if value is None:       # get
1561
 
            return dbus.UInt64(self.timeout_milliseconds())
1562
 
        old_timeout = self.timeout
1563
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1564
 
        # Reschedule disabling
1565
 
        if self.enabled:
1566
 
            now = datetime.datetime.utcnow()
1567
 
            self.expires += self.timeout - old_timeout
1568
 
            if self.expires <= now:
1569
 
                # The timeout has passed
1570
 
                self.disable()
1571
 
            else:
1572
 
                if (getattr(self, "disable_initiator_tag", None)
1573
 
                    is None):
1574
 
                    return
1575
 
                gobject.source_remove(self.disable_initiator_tag)
1576
 
                self.disable_initiator_tag = (
1577
 
                    gobject.timeout_add(
1578
 
                        timedelta_to_milliseconds(self.expires - now),
1579
 
                        self.disable))
1580
 
    
1581
 
    # ExtendedTimeout - property
1582
 
    @dbus_service_property(_interface, signature="t",
1583
 
                           access="readwrite")
1584
 
    def ExtendedTimeout_dbus_property(self, value=None):
1585
 
        if value is None:       # get
1586
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
1587
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1588
 
    
1589
 
    # Interval - property
1590
 
    @dbus_service_property(_interface, signature="t",
1591
 
                           access="readwrite")
1592
 
    def Interval_dbus_property(self, value=None):
1593
 
        if value is None:       # get
1594
 
            return dbus.UInt64(self.interval_milliseconds())
1595
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1596
 
        if getattr(self, "checker_initiator_tag", None) is None:
1597
 
            return
1598
 
        if self.enabled:
1599
 
            # Reschedule checker run
1600
 
            gobject.source_remove(self.checker_initiator_tag)
1601
 
            self.checker_initiator_tag = (gobject.timeout_add
1602
 
                                          (value, self.start_checker))
1603
 
            self.start_checker()    # Start one now, too
1604
 
    
1605
 
    # Checker - property
1606
 
    @dbus_service_property(_interface, signature="s",
1607
 
                           access="readwrite")
1608
 
    def Checker_dbus_property(self, value=None):
1609
 
        if value is None:       # get
1610
 
            return dbus.String(self.checker_command)
1611
 
        self.checker_command = unicode(value)
1612
 
    
1613
 
    # CheckerRunning - property
1614
 
    @dbus_service_property(_interface, signature="b",
1615
 
                           access="readwrite")
1616
 
    def CheckerRunning_dbus_property(self, value=None):
1617
 
        if value is None:       # get
1618
 
            return dbus.Boolean(self.checker is not None)
1619
 
        if value:
1620
 
            self.start_checker()
1621
 
        else:
1622
 
            self.stop_checker()
1623
 
    
1624
 
    # ObjectPath - property
1625
 
    @dbus_service_property(_interface, signature="o", access="read")
1626
 
    def ObjectPath_dbus_property(self):
1627
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1628
 
    
1629
 
    # Secret = property
1630
 
    @dbus_service_property(_interface, signature="ay",
1631
 
                           access="write", byte_arrays=True)
1632
 
    def Secret_dbus_property(self, value):
1633
 
        self.secret = str(value)
 
580
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
581
    StopChecker.__name__ = "StopChecker"
1634
582
    
1635
583
    del _interface
1636
584
 
1637
585
 
1638
 
class ProxyClient(object):
1639
 
    def __init__(self, child_pipe, fpr, address):
1640
 
        self._pipe = child_pipe
1641
 
        self._pipe.send(('init', fpr, address))
1642
 
        if not self._pipe.recv():
1643
 
            raise KeyError()
1644
 
    
1645
 
    def __getattribute__(self, name):
1646
 
        if name == '_pipe':
1647
 
            return super(ProxyClient, self).__getattribute__(name)
1648
 
        self._pipe.send(('getattr', name))
1649
 
        data = self._pipe.recv()
1650
 
        if data[0] == 'data':
1651
 
            return data[1]
1652
 
        if data[0] == 'function':
1653
 
            def func(*args, **kwargs):
1654
 
                self._pipe.send(('funcall', name, args, kwargs))
1655
 
                return self._pipe.recv()[1]
1656
 
            return func
1657
 
    
1658
 
    def __setattr__(self, name, value):
1659
 
        if name == '_pipe':
1660
 
            return super(ProxyClient, self).__setattr__(name, value)
1661
 
        self._pipe.send(('setattr', name, value))
1662
 
 
1663
 
 
1664
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1665
 
    """A class to handle client connections.
1666
 
    
1667
 
    Instantiated once for each connection to handle it.
 
586
def peer_certificate(session):
 
587
    "Return the peer's OpenPGP certificate as a bytestring"
 
588
    # If not an OpenPGP certificate...
 
589
    if (gnutls.library.functions
 
590
        .gnutls_certificate_type_get(session._c_object)
 
591
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
592
        # ...do the normal thing
 
593
        return session.peer_certificate
 
594
    list_size = ctypes.c_uint()
 
595
    cert_list = (gnutls.library.functions
 
596
                 .gnutls_certificate_get_peers
 
597
                 (session._c_object, ctypes.byref(list_size)))
 
598
    if list_size.value == 0:
 
599
        return None
 
600
    cert = cert_list[0]
 
601
    return ctypes.string_at(cert.data, cert.size)
 
602
 
 
603
 
 
604
def fingerprint(openpgp):
 
605
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
606
    # New GnuTLS "datum" with the OpenPGP public key
 
607
    datum = (gnutls.library.types
 
608
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
609
                                         ctypes.POINTER
 
610
                                         (ctypes.c_ubyte)),
 
611
                             ctypes.c_uint(len(openpgp))))
 
612
    # New empty GnuTLS certificate
 
613
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
614
    (gnutls.library.functions
 
615
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
616
    # Import the OpenPGP public key into the certificate
 
617
    (gnutls.library.functions
 
618
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
619
                                gnutls.library.constants
 
620
                                .GNUTLS_OPENPGP_FMT_RAW))
 
621
    # Verify the self signature in the key
 
622
    crtverify = ctypes.c_uint()
 
623
    (gnutls.library.functions
 
624
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
625
    if crtverify.value != 0:
 
626
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
627
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
628
    # New buffer for the fingerprint
 
629
    buf = ctypes.create_string_buffer(20)
 
630
    buf_len = ctypes.c_size_t()
 
631
    # Get the fingerprint from the certificate into the buffer
 
632
    (gnutls.library.functions
 
633
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
634
                                         ctypes.byref(buf_len)))
 
635
    # Deinit the certificate
 
636
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
637
    # Convert the buffer to a Python bytestring
 
638
    fpr = ctypes.string_at(buf, buf_len.value)
 
639
    # Convert the bytestring to hexadecimal notation
 
640
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
641
    return hex_fpr
 
642
 
 
643
 
 
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
645
    """A TCP request handler class.
 
646
    Instantiated by IPv6_TCPServer for each request to handle it.
1668
647
    Note: This will run in its own forked process."""
1669
648
    
1670
649
    def handle(self):
1671
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1672
 
            logger.info("TCP connection from: %s",
1673
 
                        unicode(self.client_address))
1674
 
            logger.debug("Pipe FD: %d",
1675
 
                         self.server.child_pipe.fileno())
1676
 
            
1677
 
            session = (gnutls.connection
1678
 
                       .ClientSession(self.request,
1679
 
                                      gnutls.connection
1680
 
                                      .X509Credentials()))
1681
 
            
1682
 
            # Note: gnutls.connection.X509Credentials is really a
1683
 
            # generic GnuTLS certificate credentials object so long as
1684
 
            # no X.509 keys are added to it.  Therefore, we can use it
1685
 
            # here despite using OpenPGP certificates.
1686
 
            
1687
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1688
 
            #                      "+AES-256-CBC", "+SHA1",
1689
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1690
 
            #                      "+DHE-DSS"))
1691
 
            # Use a fallback default, since this MUST be set.
1692
 
            priority = self.server.gnutls_priority
1693
 
            if priority is None:
1694
 
                priority = "NORMAL"
1695
 
            (gnutls.library.functions
1696
 
             .gnutls_priority_set_direct(session._c_object,
1697
 
                                         priority, None))
1698
 
            
1699
 
            # Start communication using the Mandos protocol
1700
 
            # Get protocol number
1701
 
            line = self.request.makefile().readline()
1702
 
            logger.debug("Protocol version: %r", line)
1703
 
            try:
1704
 
                if int(line.strip().split()[0]) > 1:
1705
 
                    raise RuntimeError
1706
 
            except (ValueError, IndexError, RuntimeError) as error:
1707
 
                logger.error("Unknown protocol version: %s", error)
1708
 
                return
1709
 
            
1710
 
            # Start GnuTLS connection
1711
 
            try:
1712
 
                session.handshake()
1713
 
            except gnutls.errors.GNUTLSError as error:
1714
 
                logger.warning("Handshake failed: %s", error)
1715
 
                # Do not run session.bye() here: the session is not
1716
 
                # established.  Just abandon the request.
1717
 
                return
1718
 
            logger.debug("Handshake succeeded")
1719
 
            
1720
 
            approval_required = False
1721
 
            try:
1722
 
                try:
1723
 
                    fpr = self.fingerprint(self.peer_certificate
1724
 
                                           (session))
1725
 
                except (TypeError,
1726
 
                        gnutls.errors.GNUTLSError) as error:
1727
 
                    logger.warning("Bad certificate: %s", error)
1728
 
                    return
1729
 
                logger.debug("Fingerprint: %s", fpr)
1730
 
                
1731
 
                try:
1732
 
                    client = ProxyClient(child_pipe, fpr,
1733
 
                                         self.client_address)
1734
 
                except KeyError:
1735
 
                    return
1736
 
                
1737
 
                if client.approval_delay:
1738
 
                    delay = client.approval_delay
1739
 
                    client.approvals_pending += 1
1740
 
                    approval_required = True
1741
 
                
1742
 
                while True:
1743
 
                    if not client.enabled:
1744
 
                        logger.info("Client %s is disabled",
1745
 
                                       client.name)
1746
 
                        if self.server.use_dbus:
1747
 
                            # Emit D-Bus signal
1748
 
                            client.Rejected("Disabled")
1749
 
                        return
1750
 
                    
1751
 
                    if client.approved or not client.approval_delay:
1752
 
                        #We are approved or approval is disabled
1753
 
                        break
1754
 
                    elif client.approved is None:
1755
 
                        logger.info("Client %s needs approval",
1756
 
                                    client.name)
1757
 
                        if self.server.use_dbus:
1758
 
                            # Emit D-Bus signal
1759
 
                            client.NeedApproval(
1760
 
                                client.approval_delay_milliseconds(),
1761
 
                                client.approved_by_default)
1762
 
                    else:
1763
 
                        logger.warning("Client %s was not approved",
1764
 
                                       client.name)
1765
 
                        if self.server.use_dbus:
1766
 
                            # Emit D-Bus signal
1767
 
                            client.Rejected("Denied")
1768
 
                        return
1769
 
                    
1770
 
                    #wait until timeout or approved
1771
 
                    time = datetime.datetime.now()
1772
 
                    client.changedstate.acquire()
1773
 
                    client.changedstate.wait(
1774
 
                        float(timedelta_to_milliseconds(delay)
1775
 
                              / 1000))
1776
 
                    client.changedstate.release()
1777
 
                    time2 = datetime.datetime.now()
1778
 
                    if (time2 - time) >= delay:
1779
 
                        if not client.approved_by_default:
1780
 
                            logger.warning("Client %s timed out while"
1781
 
                                           " waiting for approval",
1782
 
                                           client.name)
1783
 
                            if self.server.use_dbus:
1784
 
                                # Emit D-Bus signal
1785
 
                                client.Rejected("Approval timed out")
1786
 
                            return
1787
 
                        else:
1788
 
                            break
1789
 
                    else:
1790
 
                        delay -= time2 - time
1791
 
                
1792
 
                sent_size = 0
1793
 
                while sent_size < len(client.secret):
1794
 
                    try:
1795
 
                        sent = session.send(client.secret[sent_size:])
1796
 
                    except gnutls.errors.GNUTLSError as error:
1797
 
                        logger.warning("gnutls send failed",
1798
 
                                       exc_info=error)
1799
 
                        return
1800
 
                    logger.debug("Sent: %d, remaining: %d",
1801
 
                                 sent, len(client.secret)
1802
 
                                 - (sent_size + sent))
1803
 
                    sent_size += sent
1804
 
                
1805
 
                logger.info("Sending secret to %s", client.name)
1806
 
                # bump the timeout using extended_timeout
1807
 
                client.bump_timeout(client.extended_timeout)
1808
 
                if self.server.use_dbus:
1809
 
                    # Emit D-Bus signal
1810
 
                    client.GotSecret()
1811
 
            
1812
 
            finally:
1813
 
                if approval_required:
1814
 
                    client.approvals_pending -= 1
1815
 
                try:
1816
 
                    session.bye()
1817
 
                except gnutls.errors.GNUTLSError as error:
1818
 
                    logger.warning("GnuTLS bye failed",
1819
 
                                   exc_info=error)
1820
 
    
1821
 
    @staticmethod
1822
 
    def peer_certificate(session):
1823
 
        "Return the peer's OpenPGP certificate as a bytestring"
1824
 
        # If not an OpenPGP certificate...
1825
 
        if (gnutls.library.functions
1826
 
            .gnutls_certificate_type_get(session._c_object)
1827
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1828
 
            # ...do the normal thing
1829
 
            return session.peer_certificate
1830
 
        list_size = ctypes.c_uint(1)
1831
 
        cert_list = (gnutls.library.functions
1832
 
                     .gnutls_certificate_get_peers
1833
 
                     (session._c_object, ctypes.byref(list_size)))
1834
 
        if not bool(cert_list) and list_size.value != 0:
1835
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1836
 
                                            " certificate")
1837
 
        if list_size.value == 0:
1838
 
            return None
1839
 
        cert = cert_list[0]
1840
 
        return ctypes.string_at(cert.data, cert.size)
1841
 
    
1842
 
    @staticmethod
1843
 
    def fingerprint(openpgp):
1844
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1845
 
        # New GnuTLS "datum" with the OpenPGP public key
1846
 
        datum = (gnutls.library.types
1847
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1848
 
                                             ctypes.POINTER
1849
 
                                             (ctypes.c_ubyte)),
1850
 
                                 ctypes.c_uint(len(openpgp))))
1851
 
        # New empty GnuTLS certificate
1852
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1853
 
        (gnutls.library.functions
1854
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1855
 
        # Import the OpenPGP public key into the certificate
1856
 
        (gnutls.library.functions
1857
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1858
 
                                    gnutls.library.constants
1859
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1860
 
        # Verify the self signature in the key
1861
 
        crtverify = ctypes.c_uint()
1862
 
        (gnutls.library.functions
1863
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1864
 
                                         ctypes.byref(crtverify)))
1865
 
        if crtverify.value != 0:
1866
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1867
 
            raise (gnutls.errors.CertificateSecurityError
1868
 
                   ("Verify failed"))
1869
 
        # New buffer for the fingerprint
1870
 
        buf = ctypes.create_string_buffer(20)
1871
 
        buf_len = ctypes.c_size_t()
1872
 
        # Get the fingerprint from the certificate into the buffer
1873
 
        (gnutls.library.functions
1874
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1875
 
                                             ctypes.byref(buf_len)))
1876
 
        # Deinit the certificate
1877
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1878
 
        # Convert the buffer to a Python bytestring
1879
 
        fpr = ctypes.string_at(buf, buf_len.value)
1880
 
        # Convert the bytestring to hexadecimal notation
1881
 
        hex_fpr = binascii.hexlify(fpr).upper()
1882
 
        return hex_fpr
1883
 
 
1884
 
 
1885
 
class MultiprocessingMixIn(object):
1886
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1887
 
    def sub_process_main(self, request, address):
1888
 
        try:
1889
 
            self.finish_request(request, address)
1890
 
        except Exception:
1891
 
            self.handle_error(request, address)
1892
 
        self.close_request(request)
1893
 
    
1894
 
    def process_request(self, request, address):
1895
 
        """Start a new process to process the request."""
1896
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1897
 
                                       args = (request, address))
1898
 
        proc.start()
1899
 
        return proc
1900
 
 
1901
 
 
1902
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1903
 
    """ adds a pipe to the MixIn """
1904
 
    def process_request(self, request, client_address):
1905
 
        """Overrides and wraps the original process_request().
1906
 
        
1907
 
        This function creates a new pipe in self.pipe
1908
 
        """
1909
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1910
 
        
1911
 
        proc = MultiprocessingMixIn.process_request(self, request,
1912
 
                                                    client_address)
1913
 
        self.child_pipe.close()
1914
 
        self.add_pipe(parent_pipe, proc)
1915
 
    
1916
 
    def add_pipe(self, parent_pipe, proc):
1917
 
        """Dummy function; override as necessary"""
1918
 
        raise NotImplementedError
1919
 
 
1920
 
 
1921
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1922
 
                     socketserver.TCPServer, object):
1923
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1924
 
    
 
650
        logger.info(u"TCP connection from: %s",
 
651
                    unicode(self.client_address))
 
652
        session = (gnutls.connection
 
653
                   .ClientSession(self.request,
 
654
                                  gnutls.connection
 
655
                                  .X509Credentials()))
 
656
        
 
657
        line = self.request.makefile().readline()
 
658
        logger.debug(u"Protocol version: %r", line)
 
659
        try:
 
660
            if int(line.strip().split()[0]) > 1:
 
661
                raise RuntimeError
 
662
        except (ValueError, IndexError, RuntimeError), error:
 
663
            logger.error(u"Unknown protocol version: %s", error)
 
664
            return
 
665
        
 
666
        # Note: gnutls.connection.X509Credentials is really a generic
 
667
        # GnuTLS certificate credentials object so long as no X.509
 
668
        # keys are added to it.  Therefore, we can use it here despite
 
669
        # using OpenPGP certificates.
 
670
        
 
671
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
672
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
673
        #                "+DHE-DSS"))
 
674
        # Use a fallback default, since this MUST be set.
 
675
        priority = self.server.settings.get("priority", "NORMAL")
 
676
        (gnutls.library.functions
 
677
         .gnutls_priority_set_direct(session._c_object,
 
678
                                     priority, None))
 
679
        
 
680
        try:
 
681
            session.handshake()
 
682
        except gnutls.errors.GNUTLSError, error:
 
683
            logger.warning(u"Handshake failed: %s", error)
 
684
            # Do not run session.bye() here: the session is not
 
685
            # established.  Just abandon the request.
 
686
            return
 
687
        try:
 
688
            fpr = fingerprint(peer_certificate(session))
 
689
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
690
            logger.warning(u"Bad certificate: %s", error)
 
691
            session.bye()
 
692
            return
 
693
        logger.debug(u"Fingerprint: %s", fpr)
 
694
        for c in self.server.clients:
 
695
            if c.fingerprint == fpr:
 
696
                client = c
 
697
                break
 
698
        else:
 
699
            logger.warning(u"Client not found for fingerprint: %s",
 
700
                           fpr)
 
701
            session.bye()
 
702
            return
 
703
        # Have to check if client.still_valid(), since it is possible
 
704
        # that the client timed out while establishing the GnuTLS
 
705
        # session.
 
706
        if not client.still_valid():
 
707
            logger.warning(u"Client %(name)s is invalid",
 
708
                           vars(client))
 
709
            session.bye()
 
710
            return
 
711
        ## This won't work here, since we're in a fork.
 
712
        # client.bump_timeout()
 
713
        sent_size = 0
 
714
        while sent_size < len(client.secret):
 
715
            sent = session.send(client.secret[sent_size:])
 
716
            logger.debug(u"Sent: %d, remaining: %d",
 
717
                         sent, len(client.secret)
 
718
                         - (sent_size + sent))
 
719
            sent_size += sent
 
720
        session.bye()
 
721
 
 
722
 
 
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
724
                     SocketServer.TCPServer, object):
 
725
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1925
726
    Attributes:
 
727
        settings:       Server settings
 
728
        clients:        Set() of Client objects
1926
729
        enabled:        Boolean; whether this server is activated yet
1927
 
        interface:      None or a network interface name (string)
1928
 
        use_ipv6:       Boolean; to use IPv6 or not
1929
730
    """
1930
 
    def __init__(self, server_address, RequestHandlerClass,
1931
 
                 interface=None, use_ipv6=True, socketfd=None):
1932
 
        """If socketfd is set, use that file descriptor instead of
1933
 
        creating a new one with socket.socket().
1934
 
        """
1935
 
        self.interface = interface
1936
 
        if use_ipv6:
1937
 
            self.address_family = socket.AF_INET6
1938
 
        if socketfd is not None:
1939
 
            # Save the file descriptor
1940
 
            self.socketfd = socketfd
1941
 
            # Save the original socket.socket() function
1942
 
            self.socket_socket = socket.socket
1943
 
            # To implement --socket, we monkey patch socket.socket.
1944
 
            # 
1945
 
            # (When socketserver.TCPServer is a new-style class, we
1946
 
            # could make self.socket into a property instead of monkey
1947
 
            # patching socket.socket.)
1948
 
            # 
1949
 
            # Create a one-time-only replacement for socket.socket()
1950
 
            @functools.wraps(socket.socket)
1951
 
            def socket_wrapper(*args, **kwargs):
1952
 
                # Restore original function so subsequent calls are
1953
 
                # not affected.
1954
 
                socket.socket = self.socket_socket
1955
 
                del self.socket_socket
1956
 
                # This time only, return a new socket object from the
1957
 
                # saved file descriptor.
1958
 
                return socket.fromfd(self.socketfd, *args, **kwargs)
1959
 
            # Replace socket.socket() function with wrapper
1960
 
            socket.socket = socket_wrapper
1961
 
        # The socketserver.TCPServer.__init__ will call
1962
 
        # socket.socket(), which might be our replacement,
1963
 
        # socket_wrapper(), if socketfd was set.
1964
 
        socketserver.TCPServer.__init__(self, server_address,
1965
 
                                        RequestHandlerClass)
1966
 
    
 
731
    address_family = socket.AF_INET6
 
732
    def __init__(self, *args, **kwargs):
 
733
        if "settings" in kwargs:
 
734
            self.settings = kwargs["settings"]
 
735
            del kwargs["settings"]
 
736
        if "clients" in kwargs:
 
737
            self.clients = kwargs["clients"]
 
738
            del kwargs["clients"]
 
739
        self.enabled = False
 
740
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1967
741
    def server_bind(self):
1968
742
        """This overrides the normal server_bind() function
1969
743
        to bind to an interface if one was specified, and also NOT to
1970
744
        bind to an address or port if they were not specified."""
1971
 
        if self.interface is not None:
1972
 
            if SO_BINDTODEVICE is None:
1973
 
                logger.error("SO_BINDTODEVICE does not exist;"
1974
 
                             " cannot bind to interface %s",
1975
 
                             self.interface)
1976
 
            else:
1977
 
                try:
1978
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1979
 
                                           SO_BINDTODEVICE,
1980
 
                                           str(self.interface + '\0'))
1981
 
                except socket.error as error:
1982
 
                    if error.errno == errno.EPERM:
1983
 
                        logger.error("No permission to bind to"
1984
 
                                     " interface %s", self.interface)
1985
 
                    elif error.errno == errno.ENOPROTOOPT:
1986
 
                        logger.error("SO_BINDTODEVICE not available;"
1987
 
                                     " cannot bind to interface %s",
1988
 
                                     self.interface)
1989
 
                    elif error.errno == errno.ENODEV:
1990
 
                        logger.error("Interface %s does not exist,"
1991
 
                                     " cannot bind", self.interface)
1992
 
                    else:
1993
 
                        raise
 
745
        if self.settings["interface"]:
 
746
            # 25 is from /usr/include/asm-i486/socket.h
 
747
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
748
            try:
 
749
                self.socket.setsockopt(socket.SOL_SOCKET,
 
750
                                       SO_BINDTODEVICE,
 
751
                                       self.settings["interface"])
 
752
            except socket.error, error:
 
753
                if error[0] == errno.EPERM:
 
754
                    logger.error(u"No permission to"
 
755
                                 u" bind to interface %s",
 
756
                                 self.settings["interface"])
 
757
                else:
 
758
                    raise error
1994
759
        # Only bind(2) the socket if we really need to.
1995
760
        if self.server_address[0] or self.server_address[1]:
1996
761
            if not self.server_address[0]:
1997
 
                if self.address_family == socket.AF_INET6:
1998
 
                    any_address = "::" # in6addr_any
1999
 
                else:
2000
 
                    any_address = "0.0.0.0" # INADDR_ANY
2001
 
                self.server_address = (any_address,
 
762
                in6addr_any = "::"
 
763
                self.server_address = (in6addr_any,
2002
764
                                       self.server_address[1])
2003
765
            elif not self.server_address[1]:
2004
766
                self.server_address = (self.server_address[0],
2005
767
                                       0)
2006
 
#                 if self.interface:
 
768
#                 if self.settings["interface"]:
2007
769
#                     self.server_address = (self.server_address[0],
2008
770
#                                            0, # port
2009
771
#                                            0, # flowinfo
2010
772
#                                            if_nametoindex
2011
 
#                                            (self.interface))
2012
 
            return socketserver.TCPServer.server_bind(self)
2013
 
 
2014
 
 
2015
 
class MandosServer(IPv6_TCPServer):
2016
 
    """Mandos server.
2017
 
    
2018
 
    Attributes:
2019
 
        clients:        set of Client objects
2020
 
        gnutls_priority GnuTLS priority string
2021
 
        use_dbus:       Boolean; to emit D-Bus signals or not
2022
 
    
2023
 
    Assumes a gobject.MainLoop event loop.
2024
 
    """
2025
 
    def __init__(self, server_address, RequestHandlerClass,
2026
 
                 interface=None, use_ipv6=True, clients=None,
2027
 
                 gnutls_priority=None, use_dbus=True, socketfd=None):
2028
 
        self.enabled = False
2029
 
        self.clients = clients
2030
 
        if self.clients is None:
2031
 
            self.clients = {}
2032
 
        self.use_dbus = use_dbus
2033
 
        self.gnutls_priority = gnutls_priority
2034
 
        IPv6_TCPServer.__init__(self, server_address,
2035
 
                                RequestHandlerClass,
2036
 
                                interface = interface,
2037
 
                                use_ipv6 = use_ipv6,
2038
 
                                socketfd = socketfd)
 
773
#                                            (self.settings
 
774
#                                             ["interface"]))
 
775
            return super(IPv6_TCPServer, self).server_bind()
2039
776
    def server_activate(self):
2040
777
        if self.enabled:
2041
 
            return socketserver.TCPServer.server_activate(self)
2042
 
    
 
778
            return super(IPv6_TCPServer, self).server_activate()
2043
779
    def enable(self):
2044
780
        self.enabled = True
2045
 
    
2046
 
    def add_pipe(self, parent_pipe, proc):
2047
 
        # Call "handle_ipc" for both data and EOF events
2048
 
        gobject.io_add_watch(parent_pipe.fileno(),
2049
 
                             gobject.IO_IN | gobject.IO_HUP,
2050
 
                             functools.partial(self.handle_ipc,
2051
 
                                               parent_pipe =
2052
 
                                               parent_pipe,
2053
 
                                               proc = proc))
2054
 
    
2055
 
    def handle_ipc(self, source, condition, parent_pipe=None,
2056
 
                   proc = None, client_object=None):
2057
 
        # error, or the other end of multiprocessing.Pipe has closed
2058
 
        if condition & (gobject.IO_ERR | gobject.IO_HUP):
2059
 
            # Wait for other process to exit
2060
 
            proc.join()
2061
 
            return False
2062
 
        
2063
 
        # Read a request from the child
2064
 
        request = parent_pipe.recv()
2065
 
        command = request[0]
2066
 
        
2067
 
        if command == 'init':
2068
 
            fpr = request[1]
2069
 
            address = request[2]
2070
 
            
2071
 
            for c in self.clients.itervalues():
2072
 
                if c.fingerprint == fpr:
2073
 
                    client = c
2074
 
                    break
2075
 
            else:
2076
 
                logger.info("Client not found for fingerprint: %s, ad"
2077
 
                            "dress: %s", fpr, address)
2078
 
                if self.use_dbus:
2079
 
                    # Emit D-Bus signal
2080
 
                    mandos_dbus_service.ClientNotFound(fpr,
2081
 
                                                       address[0])
2082
 
                parent_pipe.send(False)
2083
 
                return False
2084
 
            
2085
 
            gobject.io_add_watch(parent_pipe.fileno(),
2086
 
                                 gobject.IO_IN | gobject.IO_HUP,
2087
 
                                 functools.partial(self.handle_ipc,
2088
 
                                                   parent_pipe =
2089
 
                                                   parent_pipe,
2090
 
                                                   proc = proc,
2091
 
                                                   client_object =
2092
 
                                                   client))
2093
 
            parent_pipe.send(True)
2094
 
            # remove the old hook in favor of the new above hook on
2095
 
            # same fileno
2096
 
            return False
2097
 
        if command == 'funcall':
2098
 
            funcname = request[1]
2099
 
            args = request[2]
2100
 
            kwargs = request[3]
2101
 
            
2102
 
            parent_pipe.send(('data', getattr(client_object,
2103
 
                                              funcname)(*args,
2104
 
                                                         **kwargs)))
2105
 
        
2106
 
        if command == 'getattr':
2107
 
            attrname = request[1]
2108
 
            if callable(client_object.__getattribute__(attrname)):
2109
 
                parent_pipe.send(('function',))
2110
 
            else:
2111
 
                parent_pipe.send(('data', client_object
2112
 
                                  .__getattribute__(attrname)))
2113
 
        
2114
 
        if command == 'setattr':
2115
 
            attrname = request[1]
2116
 
            value = request[2]
2117
 
            setattr(client_object, attrname, value)
2118
 
        
2119
 
        return True
2120
 
 
2121
 
 
2122
 
def rfc3339_duration_to_delta(duration):
2123
 
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2124
 
    
2125
 
    >>> rfc3339_duration_to_delta("P7D")
2126
 
    datetime.timedelta(7)
2127
 
    >>> rfc3339_duration_to_delta("PT60S")
2128
 
    datetime.timedelta(0, 60)
2129
 
    >>> rfc3339_duration_to_delta("PT60M")
2130
 
    datetime.timedelta(0, 3600)
2131
 
    >>> rfc3339_duration_to_delta("PT24H")
2132
 
    datetime.timedelta(1)
2133
 
    >>> rfc3339_duration_to_delta("P1W")
2134
 
    datetime.timedelta(7)
2135
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2136
 
    datetime.timedelta(0, 330)
2137
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2138
 
    datetime.timedelta(1, 200)
2139
 
    """
2140
 
    
2141
 
    # Parsing an RFC 3339 duration with regular expressions is not
2142
 
    # possible - there would have to be multiple places for the same
2143
 
    # values, like seconds.  The current code, while more esoteric, is
2144
 
    # cleaner without depending on a parsing library.  If Python had a
2145
 
    # built-in library for parsing we would use it, but we'd like to
2146
 
    # avoid excessive use of external libraries.
2147
 
    
2148
 
    # New type for defining tokens, syntax, and semantics all-in-one
2149
 
    Token = collections.namedtuple("Token",
2150
 
                                   ("regexp", # To match token; if
2151
 
                                              # "value" is not None,
2152
 
                                              # must have a "group"
2153
 
                                              # containing digits
2154
 
                                    "value",  # datetime.timedelta or
2155
 
                                              # None
2156
 
                                    "followers")) # Tokens valid after
2157
 
                                                  # this token
2158
 
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
2159
 
    # the "duration" ABNF definition in RFC 3339, Appendix A.
2160
 
    token_end = Token(re.compile(r"$"), None, frozenset())
2161
 
    token_second = Token(re.compile(r"(\d+)S"),
2162
 
                         datetime.timedelta(seconds=1),
2163
 
                         frozenset((token_end,)))
2164
 
    token_minute = Token(re.compile(r"(\d+)M"),
2165
 
                         datetime.timedelta(minutes=1),
2166
 
                         frozenset((token_second, token_end)))
2167
 
    token_hour = Token(re.compile(r"(\d+)H"),
2168
 
                       datetime.timedelta(hours=1),
2169
 
                       frozenset((token_minute, token_end)))
2170
 
    token_time = Token(re.compile(r"T"),
2171
 
                       None,
2172
 
                       frozenset((token_hour, token_minute,
2173
 
                                  token_second)))
2174
 
    token_day = Token(re.compile(r"(\d+)D"),
2175
 
                      datetime.timedelta(days=1),
2176
 
                      frozenset((token_time, token_end)))
2177
 
    token_month = Token(re.compile(r"(\d+)M"),
2178
 
                        datetime.timedelta(weeks=4),
2179
 
                        frozenset((token_day, token_end)))
2180
 
    token_year = Token(re.compile(r"(\d+)Y"),
2181
 
                       datetime.timedelta(weeks=52),
2182
 
                       frozenset((token_month, token_end)))
2183
 
    token_week = Token(re.compile(r"(\d+)W"),
2184
 
                       datetime.timedelta(weeks=1),
2185
 
                       frozenset((token_end,)))
2186
 
    token_duration = Token(re.compile(r"P"), None,
2187
 
                           frozenset((token_year, token_month,
2188
 
                                      token_day, token_time,
2189
 
                                      token_week))),
2190
 
    # Define starting values
2191
 
    value = datetime.timedelta() # Value so far
2192
 
    found_token = None
2193
 
    followers = frozenset(token_duration,) # Following valid tokens
2194
 
    s = duration                # String left to parse
2195
 
    # Loop until end token is found
2196
 
    while found_token is not token_end:
2197
 
        # Search for any currently valid tokens
2198
 
        for token in followers:
2199
 
            match = token.regexp.match(s)
2200
 
            if match is not None:
2201
 
                # Token found
2202
 
                if token.value is not None:
2203
 
                    # Value found, parse digits
2204
 
                    factor = int(match.group(1), 10)
2205
 
                    # Add to value so far
2206
 
                    value += factor * token.value
2207
 
                # Strip token from string
2208
 
                s = token.regexp.sub("", s, 1)
2209
 
                # Go to found token
2210
 
                found_token = token
2211
 
                # Set valid next tokens
2212
 
                followers = found_token.followers
2213
 
                break
2214
 
        else:
2215
 
            # No currently valid tokens were found
2216
 
            raise ValueError("Invalid RFC 3339 duration")
2217
 
    # End token found
2218
 
    return value
2219
781
 
2220
782
 
2221
783
def string_to_delta(interval):
2222
784
    """Parse a string and return a datetime.timedelta
2223
 
    
 
785
 
2224
786
    >>> string_to_delta('7d')
2225
787
    datetime.timedelta(7)
2226
788
    >>> string_to_delta('60s')
2229
791
    datetime.timedelta(0, 3600)
2230
792
    >>> string_to_delta('24h')
2231
793
    datetime.timedelta(1)
2232
 
    >>> string_to_delta('1w')
 
794
    >>> string_to_delta(u'1w')
2233
795
    datetime.timedelta(7)
2234
796
    >>> string_to_delta('5m 30s')
2235
797
    datetime.timedelta(0, 330)
2236
798
    """
2237
 
    
2238
 
    try:
2239
 
        return rfc3339_duration_to_delta(interval)
2240
 
    except ValueError:
2241
 
        pass
2242
 
    
2243
799
    timevalue = datetime.timedelta(0)
2244
800
    for s in interval.split():
2245
801
        try:
2246
802
            suffix = unicode(s[-1])
2247
803
            value = int(s[:-1])
2248
 
            if suffix == "d":
 
804
            if suffix == u"d":
2249
805
                delta = datetime.timedelta(value)
2250
 
            elif suffix == "s":
 
806
            elif suffix == u"s":
2251
807
                delta = datetime.timedelta(0, value)
2252
 
            elif suffix == "m":
 
808
            elif suffix == u"m":
2253
809
                delta = datetime.timedelta(0, 0, 0, 0, value)
2254
 
            elif suffix == "h":
 
810
            elif suffix == u"h":
2255
811
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
2256
 
            elif suffix == "w":
 
812
            elif suffix == u"w":
2257
813
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
2258
814
            else:
2259
 
                raise ValueError("Unknown suffix {0!r}"
2260
 
                                 .format(suffix))
2261
 
        except (ValueError, IndexError) as e:
2262
 
            raise ValueError(*(e.args))
 
815
                raise ValueError
 
816
        except (ValueError, IndexError):
 
817
            raise ValueError
2263
818
        timevalue += delta
2264
819
    return timevalue
2265
820
 
2266
821
 
 
822
def server_state_changed(state):
 
823
    """Derived from the Avahi example code"""
 
824
    if state == avahi.SERVER_COLLISION:
 
825
        logger.error(u"Zeroconf server name collision")
 
826
        service.remove()
 
827
    elif state == avahi.SERVER_RUNNING:
 
828
        service.add()
 
829
 
 
830
 
 
831
def entry_group_state_changed(state, error):
 
832
    """Derived from the Avahi example code"""
 
833
    logger.debug(u"Avahi state change: %i", state)
 
834
    
 
835
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
836
        logger.debug(u"Zeroconf service established.")
 
837
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
838
        logger.warning(u"Zeroconf service name collision.")
 
839
        service.rename()
 
840
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
841
        logger.critical(u"Avahi: Error in group state changed %s",
 
842
                        unicode(error))
 
843
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
844
 
 
845
def if_nametoindex(interface):
 
846
    """Call the C function if_nametoindex(), or equivalent"""
 
847
    global if_nametoindex
 
848
    try:
 
849
        if_nametoindex = (ctypes.cdll.LoadLibrary
 
850
                          (ctypes.util.find_library("c"))
 
851
                          .if_nametoindex)
 
852
    except (OSError, AttributeError):
 
853
        if "struct" not in sys.modules:
 
854
            import struct
 
855
        if "fcntl" not in sys.modules:
 
856
            import fcntl
 
857
        def if_nametoindex(interface):
 
858
            "Get an interface index the hard way, i.e. using fcntl()"
 
859
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
860
            with closing(socket.socket()) as s:
 
861
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
862
                                    struct.pack("16s16x", interface))
 
863
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
864
            return interface_index
 
865
    return if_nametoindex(interface)
 
866
 
 
867
 
2267
868
def daemon(nochdir = False, noclose = False):
2268
869
    """See daemon(3).  Standard BSD Unix function.
2269
 
    
2270
870
    This should really exist as os.daemon, but it doesn't (yet)."""
2271
871
    if os.fork():
2272
872
        sys.exit()
2277
877
        sys.exit()
2278
878
    if not noclose:
2279
879
        # Close all standard open file descriptors
2280
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
 
880
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2281
881
        if not stat.S_ISCHR(os.fstat(null).st_mode):
2282
882
            raise OSError(errno.ENODEV,
2283
 
                          "{0} not a character device"
2284
 
                          .format(os.devnull))
 
883
                          "/dev/null not a character device")
2285
884
        os.dup2(null, sys.stdin.fileno())
2286
885
        os.dup2(null, sys.stdout.fileno())
2287
886
        os.dup2(null, sys.stderr.fileno())
2290
889
 
2291
890
 
2292
891
def main():
2293
 
    
2294
 
    ##################################################################
2295
 
    # Parsing of options, both command line and config file
2296
 
    
2297
 
    parser = argparse.ArgumentParser()
2298
 
    parser.add_argument("-v", "--version", action="version",
2299
 
                        version = "%(prog)s {0}".format(version),
2300
 
                        help="show version number and exit")
2301
 
    parser.add_argument("-i", "--interface", metavar="IF",
2302
 
                        help="Bind to interface IF")
2303
 
    parser.add_argument("-a", "--address",
2304
 
                        help="Address to listen for requests on")
2305
 
    parser.add_argument("-p", "--port", type=int,
2306
 
                        help="Port number to receive requests on")
2307
 
    parser.add_argument("--check", action="store_true",
2308
 
                        help="Run self-test")
2309
 
    parser.add_argument("--debug", action="store_true",
2310
 
                        help="Debug mode; run in foreground and log"
2311
 
                        " to terminal", default=None)
2312
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
2313
 
                        help="Debug level for stdout output")
2314
 
    parser.add_argument("--priority", help="GnuTLS"
2315
 
                        " priority string (see GnuTLS documentation)")
2316
 
    parser.add_argument("--servicename",
2317
 
                        metavar="NAME", help="Zeroconf service name")
2318
 
    parser.add_argument("--configdir",
2319
 
                        default="/etc/mandos", metavar="DIR",
2320
 
                        help="Directory to search for configuration"
2321
 
                        " files")
2322
 
    parser.add_argument("--no-dbus", action="store_false",
2323
 
                        dest="use_dbus", help="Do not provide D-Bus"
2324
 
                        " system bus interface", default=None)
2325
 
    parser.add_argument("--no-ipv6", action="store_false",
2326
 
                        dest="use_ipv6", help="Do not use IPv6",
2327
 
                        default=None)
2328
 
    parser.add_argument("--no-restore", action="store_false",
2329
 
                        dest="restore", help="Do not restore stored"
2330
 
                        " state", default=None)
2331
 
    parser.add_argument("--socket", type=int,
2332
 
                        help="Specify a file descriptor to a network"
2333
 
                        " socket to use instead of creating one")
2334
 
    parser.add_argument("--statedir", metavar="DIR",
2335
 
                        help="Directory to save/restore state in")
2336
 
    parser.add_argument("--foreground", action="store_true",
2337
 
                        help="Run in foreground", default=None)
2338
 
    
2339
 
    options = parser.parse_args()
 
892
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
893
    parser.add_option("-i", "--interface", type="string",
 
894
                      metavar="IF", help="Bind to interface IF")
 
895
    parser.add_option("-a", "--address", type="string",
 
896
                      help="Address to listen for requests on")
 
897
    parser.add_option("-p", "--port", type="int",
 
898
                      help="Port number to receive requests on")
 
899
    parser.add_option("--check", action="store_true",
 
900
                      help="Run self-test")
 
901
    parser.add_option("--debug", action="store_true",
 
902
                      help="Debug mode; run in foreground and log to"
 
903
                      " terminal")
 
904
    parser.add_option("--priority", type="string", help="GnuTLS"
 
905
                      " priority string (see GnuTLS documentation)")
 
906
    parser.add_option("--servicename", type="string", metavar="NAME",
 
907
                      help="Zeroconf service name")
 
908
    parser.add_option("--configdir", type="string",
 
909
                      default="/etc/mandos", metavar="DIR",
 
910
                      help="Directory to search for configuration"
 
911
                      " files")
 
912
    parser.add_option("--no-dbus", action="store_false",
 
913
                      dest="use_dbus",
 
914
                      help="Do not provide D-Bus system bus"
 
915
                      " interface")
 
916
    options = parser.parse_args()[0]
2340
917
    
2341
918
    if options.check:
2342
919
        import doctest
2349
926
                        "port": "",
2350
927
                        "debug": "False",
2351
928
                        "priority":
2352
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",
 
929
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2353
930
                        "servicename": "Mandos",
2354
931
                        "use_dbus": "True",
2355
 
                        "use_ipv6": "True",
2356
 
                        "debuglevel": "",
2357
 
                        "restore": "True",
2358
 
                        "socket": "",
2359
 
                        "statedir": "/var/lib/mandos",
2360
 
                        "foreground": "False",
2361
932
                        }
2362
933
    
2363
934
    # Parse config file for server-global settings
2364
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
935
    server_config = ConfigParser.SafeConfigParser(server_defaults)
2365
936
    del server_defaults
2366
 
    server_config.read(os.path.join(options.configdir,
2367
 
                                    "mandos.conf"))
 
937
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2368
938
    # Convert the SafeConfigParser object to a dict
2369
939
    server_settings = server_config.defaults()
2370
 
    # Use the appropriate methods on the non-string config options
2371
 
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2372
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2373
 
                                                           option)
2374
 
    if server_settings["port"]:
2375
 
        server_settings["port"] = server_config.getint("DEFAULT",
2376
 
                                                       "port")
2377
 
    if server_settings["socket"]:
2378
 
        server_settings["socket"] = server_config.getint("DEFAULT",
2379
 
                                                         "socket")
2380
 
        # Later, stdin will, and stdout and stderr might, be dup'ed
2381
 
        # over with an opened os.devnull.  But we don't want this to
2382
 
        # happen with a supplied network socket.
2383
 
        if 0 <= server_settings["socket"] <= 2:
2384
 
            server_settings["socket"] = os.dup(server_settings
2385
 
                                               ["socket"])
 
940
    # Use getboolean on the boolean config options
 
941
    server_settings["debug"] = (server_config.getboolean
 
942
                                ("DEFAULT", "debug"))
 
943
    server_settings["use_dbus"] = (server_config.getboolean
 
944
                                   ("DEFAULT", "use_dbus"))
2386
945
    del server_config
2387
946
    
2388
947
    # Override the settings from the config file with command line
2389
948
    # options, if set.
2390
949
    for option in ("interface", "address", "port", "debug",
2391
950
                   "priority", "servicename", "configdir",
2392
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2393
 
                   "statedir", "socket", "foreground"):
 
951
                   "use_dbus"):
2394
952
        value = getattr(options, option)
2395
953
        if value is not None:
2396
954
            server_settings[option] = value
2397
955
    del options
2398
 
    # Force all strings to be unicode
2399
 
    for option in server_settings.keys():
2400
 
        if type(server_settings[option]) is str:
2401
 
            server_settings[option] = unicode(server_settings[option])
2402
 
    # Force all boolean options to be boolean
2403
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2404
 
                   "foreground"):
2405
 
        server_settings[option] = bool(server_settings[option])
2406
 
    # Debug implies foreground
2407
 
    if server_settings["debug"]:
2408
 
        server_settings["foreground"] = True
2409
956
    # Now we have our good server settings in "server_settings"
2410
957
    
2411
 
    ##################################################################
2412
 
    
2413
958
    # For convenience
2414
959
    debug = server_settings["debug"]
2415
 
    debuglevel = server_settings["debuglevel"]
2416
960
    use_dbus = server_settings["use_dbus"]
2417
 
    use_ipv6 = server_settings["use_ipv6"]
2418
 
    stored_state_path = os.path.join(server_settings["statedir"],
2419
 
                                     stored_state_file)
2420
 
    foreground = server_settings["foreground"]
2421
961
    
2422
 
    if debug:
2423
 
        initlogger(debug, logging.DEBUG)
2424
 
    else:
2425
 
        if not debuglevel:
2426
 
            initlogger(debug)
2427
 
        else:
2428
 
            level = getattr(logging, debuglevel.upper())
2429
 
            initlogger(debug, level)
 
962
    if not debug:
 
963
        syslogger.setLevel(logging.WARNING)
 
964
        console.setLevel(logging.WARNING)
2430
965
    
2431
966
    if server_settings["servicename"] != "Mandos":
2432
967
        syslogger.setFormatter(logging.Formatter
2433
 
                               ('Mandos ({0}) [%(process)d]:'
2434
 
                                ' %(levelname)s: %(message)s'
2435
 
                                .format(server_settings
2436
 
                                        ["servicename"])))
 
968
                               ('Mandos (%s): %%(levelname)s:'
 
969
                                ' %%(message)s'
 
970
                                % server_settings["servicename"]))
2437
971
    
2438
972
    # Parse config file with clients
2439
 
    client_config = configparser.SafeConfigParser(Client
2440
 
                                                  .client_defaults)
 
973
    client_defaults = { "timeout": "1h",
 
974
                        "interval": "5m",
 
975
                        "checker": "fping -q -- %%(host)s",
 
976
                        "host": "",
 
977
                        }
 
978
    client_config = ConfigParser.SafeConfigParser(client_defaults)
2441
979
    client_config.read(os.path.join(server_settings["configdir"],
2442
980
                                    "clients.conf"))
2443
981
    
2444
 
    global mandos_dbus_service
2445
 
    mandos_dbus_service = None
2446
 
    
2447
 
    tcp_server = MandosServer((server_settings["address"],
2448
 
                               server_settings["port"]),
2449
 
                              ClientHandler,
2450
 
                              interface=(server_settings["interface"]
2451
 
                                         or None),
2452
 
                              use_ipv6=use_ipv6,
2453
 
                              gnutls_priority=
2454
 
                              server_settings["priority"],
2455
 
                              use_dbus=use_dbus,
2456
 
                              socketfd=(server_settings["socket"]
2457
 
                                        or None))
2458
 
    if not foreground:
2459
 
        pidfilename = "/run/mandos.pid"
2460
 
        if not os.path.isdir("/run/."):
2461
 
            pidfilename = "/var/run/mandos.pid"
2462
 
        pidfile = None
2463
 
        try:
2464
 
            pidfile = open(pidfilename, "w")
2465
 
        except IOError as e:
2466
 
            logger.error("Could not open file %r", pidfilename,
2467
 
                         exc_info=e)
2468
 
    
2469
 
    for name in ("_mandos", "mandos", "nobody"):
2470
 
        try:
2471
 
            uid = pwd.getpwnam(name).pw_uid
2472
 
            gid = pwd.getpwnam(name).pw_gid
2473
 
            break
 
982
    clients = Set()
 
983
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
984
                                 server_settings["port"]),
 
985
                                TCP_handler,
 
986
                                settings=server_settings,
 
987
                                clients=clients)
 
988
    pidfilename = "/var/run/mandos.pid"
 
989
    try:
 
990
        pidfile = open(pidfilename, "w")
 
991
    except IOError, error:
 
992
        logger.error("Could not open file %r", pidfilename)
 
993
    
 
994
    try:
 
995
        uid = pwd.getpwnam("_mandos").pw_uid
 
996
        gid = pwd.getpwnam("_mandos").pw_gid
 
997
    except KeyError:
 
998
        try:
 
999
            uid = pwd.getpwnam("mandos").pw_uid
 
1000
            gid = pwd.getpwnam("mandos").pw_gid
2474
1001
        except KeyError:
2475
 
            continue
2476
 
    else:
2477
 
        uid = 65534
2478
 
        gid = 65534
 
1002
            try:
 
1003
                uid = pwd.getpwnam("nobody").pw_uid
 
1004
                gid = pwd.getpwnam("nogroup").pw_gid
 
1005
            except KeyError:
 
1006
                uid = 65534
 
1007
                gid = 65534
2479
1008
    try:
 
1009
        os.setuid(uid)
2480
1010
        os.setgid(gid)
2481
 
        os.setuid(uid)
2482
 
    except OSError as error:
2483
 
        if error.errno != errno.EPERM:
 
1011
    except OSError, error:
 
1012
        if error[0] != errno.EPERM:
2484
1013
            raise error
2485
1014
    
2486
 
    if debug:
2487
 
        # Enable all possible GnuTLS debugging
2488
 
        
2489
 
        # "Use a log level over 10 to enable all debugging options."
2490
 
        # - GnuTLS manual
2491
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2492
 
        
2493
 
        @gnutls.library.types.gnutls_log_func
2494
 
        def debug_gnutls(level, string):
2495
 
            logger.debug("GnuTLS: %s", string[:-1])
2496
 
        
2497
 
        (gnutls.library.functions
2498
 
         .gnutls_global_set_log_function(debug_gnutls))
2499
 
        
2500
 
        # Redirect stdin so all checkers get /dev/null
2501
 
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2502
 
        os.dup2(null, sys.stdin.fileno())
2503
 
        if null > 2:
2504
 
            os.close(null)
2505
 
    
2506
 
    # Need to fork before connecting to D-Bus
2507
 
    if not foreground:
2508
 
        # Close all input and output, do double fork, etc.
2509
 
        daemon()
2510
 
    
2511
 
    # multiprocessing will use threads, so before we use gobject we
2512
 
    # need to inform gobject that threads will be used.
2513
 
    gobject.threads_init()
 
1015
    global service
 
1016
    service = AvahiService(name = server_settings["servicename"],
 
1017
                           servicetype = "_mandos._tcp", )
 
1018
    if server_settings["interface"]:
 
1019
        service.interface = (if_nametoindex
 
1020
                             (server_settings["interface"]))
2514
1021
    
2515
1022
    global main_loop
 
1023
    global bus
 
1024
    global server
2516
1025
    # From the Avahi example code
2517
 
    DBusGMainLoop(set_as_default=True)
 
1026
    DBusGMainLoop(set_as_default=True )
2518
1027
    main_loop = gobject.MainLoop()
2519
1028
    bus = dbus.SystemBus()
 
1029
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1030
                                           avahi.DBUS_PATH_SERVER),
 
1031
                            avahi.DBUS_INTERFACE_SERVER)
2520
1032
    # End of Avahi example code
2521
1033
    if use_dbus:
2522
 
        try:
2523
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2524
 
                                            bus, do_not_queue=True)
2525
 
            old_bus_name = (dbus.service.BusName
2526
 
                            ("se.bsnet.fukt.Mandos", bus,
2527
 
                             do_not_queue=True))
2528
 
        except dbus.exceptions.NameExistsException as e:
2529
 
            logger.error("Disabling D-Bus:", exc_info=e)
2530
 
            use_dbus = False
2531
 
            server_settings["use_dbus"] = False
2532
 
            tcp_server.use_dbus = False
2533
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2534
 
    service = AvahiServiceToSyslog(name =
2535
 
                                   server_settings["servicename"],
2536
 
                                   servicetype = "_mandos._tcp",
2537
 
                                   protocol = protocol, bus = bus)
2538
 
    if server_settings["interface"]:
2539
 
        service.interface = (if_nametoindex
2540
 
                             (str(server_settings["interface"])))
2541
 
    
2542
 
    global multiprocessing_manager
2543
 
    multiprocessing_manager = multiprocessing.Manager()
2544
 
    
2545
 
    client_class = Client
2546
 
    if use_dbus:
2547
 
        client_class = functools.partial(ClientDBus, bus = bus)
2548
 
    
2549
 
    client_settings = Client.config_parser(client_config)
2550
 
    old_client_settings = {}
2551
 
    clients_data = {}
2552
 
    
2553
 
    # This is used to redirect stdout and stderr for checker processes
2554
 
    global wnull
2555
 
    wnull = open(os.devnull, "w") # A writable /dev/null
2556
 
    # Only used if server is running in foreground but not in debug
2557
 
    # mode
2558
 
    if debug or not foreground:
2559
 
        wnull.close()
2560
 
    
2561
 
    # Get client data and settings from last running state.
2562
 
    if server_settings["restore"]:
2563
 
        try:
2564
 
            with open(stored_state_path, "rb") as stored_state:
2565
 
                clients_data, old_client_settings = (pickle.load
2566
 
                                                     (stored_state))
2567
 
            os.remove(stored_state_path)
2568
 
        except IOError as e:
2569
 
            if e.errno == errno.ENOENT:
2570
 
                logger.warning("Could not load persistent state: {0}"
2571
 
                                .format(os.strerror(e.errno)))
2572
 
            else:
2573
 
                logger.critical("Could not load persistent state:",
2574
 
                                exc_info=e)
2575
 
                raise
2576
 
        except EOFError as e:
2577
 
            logger.warning("Could not load persistent state: "
2578
 
                           "EOFError:", exc_info=e)
2579
 
    
2580
 
    with PGPEngine() as pgp:
2581
 
        for client_name, client in clients_data.iteritems():
2582
 
            # Skip removed clients
2583
 
            if client_name not in client_settings:
2584
 
                continue
2585
 
            
2586
 
            # Decide which value to use after restoring saved state.
2587
 
            # We have three different values: Old config file,
2588
 
            # new config file, and saved state.
2589
 
            # New config value takes precedence if it differs from old
2590
 
            # config value, otherwise use saved state.
2591
 
            for name, value in client_settings[client_name].items():
2592
 
                try:
2593
 
                    # For each value in new config, check if it
2594
 
                    # differs from the old config value (Except for
2595
 
                    # the "secret" attribute)
2596
 
                    if (name != "secret" and
2597
 
                        value != old_client_settings[client_name]
2598
 
                        [name]):
2599
 
                        client[name] = value
2600
 
                except KeyError:
2601
 
                    pass
2602
 
            
2603
 
            # Clients who has passed its expire date can still be
2604
 
            # enabled if its last checker was successful.  Clients
2605
 
            # whose checker succeeded before we stored its state is
2606
 
            # assumed to have successfully run all checkers during
2607
 
            # downtime.
2608
 
            if client["enabled"]:
2609
 
                if datetime.datetime.utcnow() >= client["expires"]:
2610
 
                    if not client["last_checked_ok"]:
2611
 
                        logger.warning(
2612
 
                            "disabling client {0} - Client never "
2613
 
                            "performed a successful checker"
2614
 
                            .format(client_name))
2615
 
                        client["enabled"] = False
2616
 
                    elif client["last_checker_status"] != 0:
2617
 
                        logger.warning(
2618
 
                            "disabling client {0} - Client "
2619
 
                            "last checker failed with error code {1}"
2620
 
                            .format(client_name,
2621
 
                                    client["last_checker_status"]))
2622
 
                        client["enabled"] = False
2623
 
                    else:
2624
 
                        client["expires"] = (datetime.datetime
2625
 
                                             .utcnow()
2626
 
                                             + client["timeout"])
2627
 
                        logger.debug("Last checker succeeded,"
2628
 
                                     " keeping {0} enabled"
2629
 
                                     .format(client_name))
2630
 
            try:
2631
 
                client["secret"] = (
2632
 
                    pgp.decrypt(client["encrypted_secret"],
2633
 
                                client_settings[client_name]
2634
 
                                ["secret"]))
2635
 
            except PGPError:
2636
 
                # If decryption fails, we use secret from new settings
2637
 
                logger.debug("Failed to decrypt {0} old secret"
2638
 
                             .format(client_name))
2639
 
                client["secret"] = (
2640
 
                    client_settings[client_name]["secret"])
2641
 
    
2642
 
    # Add/remove clients based on new changes made to config
2643
 
    for client_name in (set(old_client_settings)
2644
 
                        - set(client_settings)):
2645
 
        del clients_data[client_name]
2646
 
    for client_name in (set(client_settings)
2647
 
                        - set(old_client_settings)):
2648
 
        clients_data[client_name] = client_settings[client_name]
2649
 
    
2650
 
    # Create all client objects
2651
 
    for client_name, client in clients_data.iteritems():
2652
 
        tcp_server.clients[client_name] = client_class(
2653
 
            name = client_name, settings = client,
2654
 
            server_settings = server_settings)
2655
 
    
2656
 
    if not tcp_server.clients:
2657
 
        logger.warning("No clients defined")
2658
 
    
2659
 
    if not foreground:
2660
 
        if pidfile is not None:
2661
 
            try:
2662
 
                with pidfile:
2663
 
                    pid = os.getpid()
2664
 
                    pidfile.write(str(pid) + "\n".encode("utf-8"))
2665
 
            except IOError:
2666
 
                logger.error("Could not write to file %r with PID %d",
2667
 
                             pidfilename, pid)
 
1034
        bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
 
1035
                                        bus)
 
1036
    
 
1037
    clients.update(Set(Client(name = section,
 
1038
                              config
 
1039
                              = dict(client_config.items(section)),
 
1040
                              use_dbus = use_dbus)
 
1041
                       for section in client_config.sections()))
 
1042
    if not clients:
 
1043
        logger.warning(u"No clients defined")
 
1044
    
 
1045
    if debug:
 
1046
        # Redirect stdin so all checkers get /dev/null
 
1047
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
1048
        os.dup2(null, sys.stdin.fileno())
 
1049
        if null > 2:
 
1050
            os.close(null)
 
1051
    else:
 
1052
        # No console logging
 
1053
        logger.removeHandler(console)
 
1054
        # Close all input and output, do double fork, etc.
 
1055
        daemon()
 
1056
    
 
1057
    try:
 
1058
        pid = os.getpid()
 
1059
        pidfile.write(str(pid) + "\n")
 
1060
        pidfile.close()
2668
1061
        del pidfile
2669
 
        del pidfilename
2670
 
    
 
1062
    except IOError:
 
1063
        logger.error(u"Could not write to file %r with PID %d",
 
1064
                     pidfilename, pid)
 
1065
    except NameError:
 
1066
        # "pidfile" was never created
 
1067
        pass
 
1068
    del pidfilename
 
1069
    
 
1070
    def cleanup():
 
1071
        "Cleanup function; run on exit"
 
1072
        global group
 
1073
        # From the Avahi example code
 
1074
        if not group is None:
 
1075
            group.Free()
 
1076
            group = None
 
1077
        # End of Avahi example code
 
1078
        
 
1079
        while clients:
 
1080
            client = clients.pop()
 
1081
            client.disable_hook = None
 
1082
            client.disable()
 
1083
    
 
1084
    atexit.register(cleanup)
 
1085
    
 
1086
    if not debug:
 
1087
        signal.signal(signal.SIGINT, signal.SIG_IGN)
2671
1088
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2672
1089
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2673
1090
    
2674
1091
    if use_dbus:
2675
 
        @alternate_dbus_interfaces({"se.recompile.Mandos":
2676
 
                                        "se.bsnet.fukt.Mandos"})
2677
 
        class MandosDBusService(DBusObjectWithProperties):
 
1092
        class MandosServer(dbus.service.Object):
2678
1093
            """A D-Bus proxy object"""
2679
1094
            def __init__(self):
2680
 
                dbus.service.Object.__init__(self, bus, "/")
2681
 
            _interface = "se.recompile.Mandos"
2682
 
            
2683
 
            @dbus_interface_annotations(_interface)
2684
 
            def _foo(self):
2685
 
                return { "org.freedesktop.DBus.Property"
2686
 
                         ".EmitsChangedSignal":
2687
 
                             "false"}
2688
 
            
 
1095
                dbus.service.Object.__init__(self, bus,
 
1096
                                             "/Mandos")
 
1097
            _interface = u"org.mandos_system.Mandos"
 
1098
 
 
1099
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1100
            def ClientAdded(self, objpath, properties):
 
1101
                "D-Bus signal"
 
1102
                pass
 
1103
 
2689
1104
            @dbus.service.signal(_interface, signature="o")
2690
 
            def ClientAdded(self, objpath):
2691
 
                "D-Bus signal"
2692
 
                pass
2693
 
            
2694
 
            @dbus.service.signal(_interface, signature="ss")
2695
 
            def ClientNotFound(self, fingerprint, address):
2696
 
                "D-Bus signal"
2697
 
                pass
2698
 
            
2699
 
            @dbus.service.signal(_interface, signature="os")
2700
 
            def ClientRemoved(self, objpath, name):
2701
 
                "D-Bus signal"
2702
 
                pass
2703
 
            
 
1105
            def ClientRemoved(self, objpath):
 
1106
                "D-Bus signal"
 
1107
                pass
 
1108
 
2704
1109
            @dbus.service.method(_interface, out_signature="ao")
2705
1110
            def GetAllClients(self):
2706
 
                "D-Bus method"
2707
 
                return dbus.Array(c.dbus_object_path
2708
 
                                  for c in
2709
 
                                  tcp_server.clients.itervalues())
2710
 
            
2711
 
            @dbus.service.method(_interface,
2712
 
                                 out_signature="a{oa{sv}}")
 
1111
                return dbus.Array(c.dbus_object_path for c in clients)
 
1112
 
 
1113
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
2713
1114
            def GetAllClientsWithProperties(self):
2714
 
                "D-Bus method"
2715
1115
                return dbus.Dictionary(
2716
 
                    ((c.dbus_object_path, c.GetAll(""))
2717
 
                     for c in tcp_server.clients.itervalues()),
 
1116
                    ((c.dbus_object_path, c.GetAllProperties())
 
1117
                     for c in clients),
2718
1118
                    signature="oa{sv}")
2719
 
            
 
1119
 
2720
1120
            @dbus.service.method(_interface, in_signature="o")
2721
1121
            def RemoveClient(self, object_path):
2722
 
                "D-Bus method"
2723
 
                for c in tcp_server.clients.itervalues():
 
1122
                for c in clients:
2724
1123
                    if c.dbus_object_path == object_path:
2725
 
                        del tcp_server.clients[c.name]
2726
 
                        c.remove_from_connection()
 
1124
                        clients.remove(c)
2727
1125
                        # Don't signal anything except ClientRemoved
2728
 
                        c.disable(quiet=True)
 
1126
                        c.use_dbus = False
 
1127
                        c.disable()
2729
1128
                        # Emit D-Bus signal
2730
 
                        self.ClientRemoved(object_path, c.name)
 
1129
                        self.ClientRemoved(object_path)
2731
1130
                        return
2732
 
                raise KeyError(object_path)
2733
 
            
 
1131
                raise KeyError
 
1132
            @dbus.service.method(_interface)
 
1133
            def Quit(self):
 
1134
                main_loop.quit()
 
1135
 
2734
1136
            del _interface
2735
 
        
2736
 
        mandos_dbus_service = MandosDBusService()
2737
 
    
2738
 
    def cleanup():
2739
 
        "Cleanup function; run on exit"
2740
 
        service.cleanup()
2741
 
        
2742
 
        multiprocessing.active_children()
2743
 
        wnull.close()
2744
 
        if not (tcp_server.clients or client_settings):
2745
 
            return
2746
 
        
2747
 
        # Store client before exiting. Secrets are encrypted with key
2748
 
        # based on what config file has. If config file is
2749
 
        # removed/edited, old secret will thus be unrecovable.
2750
 
        clients = {}
2751
 
        with PGPEngine() as pgp:
2752
 
            for client in tcp_server.clients.itervalues():
2753
 
                key = client_settings[client.name]["secret"]
2754
 
                client.encrypted_secret = pgp.encrypt(client.secret,
2755
 
                                                      key)
2756
 
                client_dict = {}
2757
 
                
2758
 
                # A list of attributes that can not be pickled
2759
 
                # + secret.
2760
 
                exclude = set(("bus", "changedstate", "secret",
2761
 
                               "checker", "server_settings"))
2762
 
                for name, typ in (inspect.getmembers
2763
 
                                  (dbus.service.Object)):
2764
 
                    exclude.add(name)
2765
 
                
2766
 
                client_dict["encrypted_secret"] = (client
2767
 
                                                   .encrypted_secret)
2768
 
                for attr in client.client_structure:
2769
 
                    if attr not in exclude:
2770
 
                        client_dict[attr] = getattr(client, attr)
2771
 
                
2772
 
                clients[client.name] = client_dict
2773
 
                del client_settings[client.name]["secret"]
2774
 
        
2775
 
        try:
2776
 
            with (tempfile.NamedTemporaryFile
2777
 
                  (mode='wb', suffix=".pickle", prefix='clients-',
2778
 
                   dir=os.path.dirname(stored_state_path),
2779
 
                   delete=False)) as stored_state:
2780
 
                pickle.dump((clients, client_settings), stored_state)
2781
 
                tempname=stored_state.name
2782
 
            os.rename(tempname, stored_state_path)
2783
 
        except (IOError, OSError) as e:
2784
 
            if not debug:
2785
 
                try:
2786
 
                    os.remove(tempname)
2787
 
                except NameError:
2788
 
                    pass
2789
 
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
2790
 
                logger.warning("Could not save persistent state: {0}"
2791
 
                               .format(os.strerror(e.errno)))
2792
 
            else:
2793
 
                logger.warning("Could not save persistent state:",
2794
 
                               exc_info=e)
2795
 
                raise e
2796
 
        
2797
 
        # Delete all clients, and settings from config
2798
 
        while tcp_server.clients:
2799
 
            name, client = tcp_server.clients.popitem()
2800
 
            if use_dbus:
2801
 
                client.remove_from_connection()
2802
 
            # Don't signal anything except ClientRemoved
2803
 
            client.disable(quiet=True)
2804
 
            if use_dbus:
2805
 
                # Emit D-Bus signal
2806
 
                mandos_dbus_service.ClientRemoved(client
2807
 
                                                  .dbus_object_path,
2808
 
                                                  client.name)
2809
 
        client_settings.clear()
2810
 
    
2811
 
    atexit.register(cleanup)
2812
 
    
2813
 
    for client in tcp_server.clients.itervalues():
 
1137
    
 
1138
        mandos_server = MandosServer()
 
1139
    
 
1140
    for client in clients:
2814
1141
        if use_dbus:
2815
1142
            # Emit D-Bus signal
2816
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2817
 
        # Need to initiate checking of clients
2818
 
        if client.enabled:
2819
 
            client.init_checker()
 
1143
            mandos_server.ClientAdded(client.dbus_object_path,
 
1144
                                      client.GetAllProperties())
 
1145
        client.enable()
2820
1146
    
2821
1147
    tcp_server.enable()
2822
1148
    tcp_server.server_activate()
2823
1149
    
2824
1150
    # Find out what port we got
2825
1151
    service.port = tcp_server.socket.getsockname()[1]
2826
 
    if use_ipv6:
2827
 
        logger.info("Now listening on address %r, port %d,"
2828
 
                    " flowinfo %d, scope_id %d",
2829
 
                    *tcp_server.socket.getsockname())
2830
 
    else:                       # IPv4
2831
 
        logger.info("Now listening on address %r, port %d",
2832
 
                    *tcp_server.socket.getsockname())
 
1152
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
1153
                u" scope_id %d" % tcp_server.socket.getsockname())
2833
1154
    
2834
1155
    #service.interface = tcp_server.socket.getsockname()[3]
2835
1156
    
2836
1157
    try:
2837
1158
        # From the Avahi example code
 
1159
        server.connect_to_signal("StateChanged", server_state_changed)
2838
1160
        try:
2839
 
            service.activate()
2840
 
        except dbus.exceptions.DBusException as error:
2841
 
            logger.critical("D-Bus Exception", exc_info=error)
2842
 
            cleanup()
 
1161
            server_state_changed(server.GetState())
 
1162
        except dbus.exceptions.DBusException, error:
 
1163
            logger.critical(u"DBusException: %s", error)
2843
1164
            sys.exit(1)
2844
1165
        # End of Avahi example code
2845
1166
        
2848
1169
                             (tcp_server.handle_request
2849
1170
                              (*args[2:], **kwargs) or True))
2850
1171
        
2851
 
        logger.debug("Starting main loop")
 
1172
        logger.debug(u"Starting main loop")
2852
1173
        main_loop.run()
2853
 
    except AvahiError as error:
2854
 
        logger.critical("Avahi Error", exc_info=error)
2855
 
        cleanup()
 
1174
    except AvahiError, error:
 
1175
        logger.critical(u"AvahiError: %s", error)
2856
1176
        sys.exit(1)
2857
1177
    except KeyboardInterrupt:
2858
1178
        if debug:
2859
 
            print("", file=sys.stderr)
2860
 
        logger.debug("Server received KeyboardInterrupt")
2861
 
    logger.debug("Server exiting")
2862
 
    # Must run before the D-Bus bus name gets deregistered
2863
 
    cleanup()
 
1179
            print
2864
1180
 
2865
1181
if __name__ == '__main__':
2866
1182
    main()