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  • Committer: Teddy Hogeborn
  • Date: 2008-09-13 15:36:18 UTC
  • Revision ID: teddy@fukt.bsnet.se-20080913153618-atp386q2bqj0ku99
* Makefile (install-client-nokey): Do "&&" instead of ";" to catch
                                   errors.

* README: Kill the straight quotes.  Add copyright notice.

* overview.xml: Improved wording.

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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 © 2008-2011 Teddy Hogeborn
15
 
# Copyright © 2008-2011 Björn Påhlsson
 
14
# Copyright © 2007-2008 Teddy Hogeborn & Björn Påhlsson
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
28
27
# along with this program.  If not, see
29
28
# <http://www.gnu.org/licenses/>.
30
29
31
 
# Contact the authors at <mandos@recompile.se>.
 
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
33
32
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
 
33
from __future__ import division
36
34
 
37
 
import SocketServer as socketserver
 
35
import SocketServer
38
36
import socket
39
 
import argparse
 
37
import select
 
38
from optparse import OptionParser
40
39
import datetime
41
40
import errno
42
41
import gnutls.crypto
45
44
import gnutls.library.functions
46
45
import gnutls.library.constants
47
46
import gnutls.library.types
48
 
import ConfigParser as configparser
 
47
import ConfigParser
49
48
import sys
50
49
import re
51
50
import os
52
51
import signal
 
52
from sets import Set
53
53
import subprocess
54
54
import atexit
55
55
import stat
56
56
import logging
57
57
import logging.handlers
58
58
import pwd
59
 
import contextlib
60
 
import struct
61
 
import fcntl
62
 
import functools
63
 
import cPickle as pickle
64
 
import multiprocessing
65
 
import types
66
 
import binascii
67
 
import tempfile
68
59
 
69
60
import dbus
70
 
import dbus.service
71
61
import gobject
72
62
import avahi
73
63
from dbus.mainloop.glib import DBusGMainLoop
74
64
import ctypes
75
 
import ctypes.util
76
 
import xml.dom.minidom
77
 
import inspect
78
 
import GnuPGInterface
79
 
 
80
 
try:
81
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
82
 
except AttributeError:
83
 
    try:
84
 
        from IN import SO_BINDTODEVICE
85
 
    except ImportError:
86
 
        SO_BINDTODEVICE = None
87
 
 
88
 
 
89
 
version = "1.4.1"
90
 
stored_state_file = "clients.pickle"
91
 
 
92
 
logger = logging.getLogger()
93
 
syslogger = (logging.handlers.SysLogHandler
94
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
 
              address = str("/dev/log")))
96
 
 
97
 
try:
98
 
    if_nametoindex = (ctypes.cdll.LoadLibrary
99
 
                      (ctypes.util.find_library("c"))
100
 
                      .if_nametoindex)
101
 
except (OSError, AttributeError):
102
 
    def if_nametoindex(interface):
103
 
        "Get an interface index the hard way, i.e. using fcntl()"
104
 
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
105
 
        with contextlib.closing(socket.socket()) as s:
106
 
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
107
 
                                struct.pack(str("16s16x"),
108
 
                                            interface))
109
 
        interface_index = struct.unpack(str("I"),
110
 
                                        ifreq[16:20])[0]
111
 
        return interface_index
112
 
 
113
 
 
114
 
def initlogger(level=logging.WARNING):
115
 
    """init logger and add loglevel"""
116
 
    
117
 
    syslogger.setFormatter(logging.Formatter
118
 
                           ('Mandos [%(process)d]: %(levelname)s:'
119
 
                            ' %(message)s'))
120
 
    logger.addHandler(syslogger)
121
 
    
122
 
    console = logging.StreamHandler()
123
 
    console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
124
 
                                           ' [%(process)d]:'
125
 
                                           ' %(levelname)s:'
126
 
                                           ' %(message)s'))
127
 
    logger.addHandler(console)
128
 
    logger.setLevel(level)
129
 
 
130
 
 
131
 
class CryptoError(Exception):
132
 
    pass
133
 
 
134
 
 
135
 
class Crypto(object):
136
 
    """A simple class for OpenPGP symmetric encryption & decryption"""
137
 
    def __init__(self):
138
 
        self.gnupg = GnuPGInterface.GnuPG()
139
 
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
140
 
        self.gnupg = GnuPGInterface.GnuPG()
141
 
        self.gnupg.options.meta_interactive = False
142
 
        self.gnupg.options.homedir = self.tempdir
143
 
        self.gnupg.options.extra_args.extend(['--force-mdc',
144
 
                                              '--quiet'])
145
 
    
146
 
    def __enter__(self):
147
 
        return self
148
 
    
149
 
    def __exit__ (self, exc_type, exc_value, traceback):
150
 
        self._cleanup()
151
 
        return False
152
 
    
153
 
    def __del__(self):
154
 
        self._cleanup()
155
 
    
156
 
    def _cleanup(self):
157
 
        if self.tempdir is not None:
158
 
            # Delete contents of tempdir
159
 
            for root, dirs, files in os.walk(self.tempdir,
160
 
                                             topdown = False):
161
 
                for filename in files:
162
 
                    os.remove(os.path.join(root, filename))
163
 
                for dirname in dirs:
164
 
                    os.rmdir(os.path.join(root, dirname))
165
 
            # Remove tempdir
166
 
            os.rmdir(self.tempdir)
167
 
            self.tempdir = None
168
 
    
169
 
    def password_encode(self, password):
170
 
        # Passphrase can not be empty and can not contain newlines or
171
 
        # NUL bytes.  So we prefix it and hex encode it.
172
 
        return b"mandos" + binascii.hexlify(password)
173
 
    
174
 
    def encrypt(self, data, password):
175
 
        self.gnupg.passphrase = self.password_encode(password)
176
 
        with open(os.devnull) as devnull:
177
 
            try:
178
 
                proc = self.gnupg.run(['--symmetric'],
179
 
                                      create_fhs=['stdin', 'stdout'],
180
 
                                      attach_fhs={'stderr': devnull})
181
 
                with contextlib.closing(proc.handles['stdin']) as f:
182
 
                    f.write(data)
183
 
                with contextlib.closing(proc.handles['stdout']) as f:
184
 
                    ciphertext = f.read()
185
 
                proc.wait()
186
 
            except IOError as e:
187
 
                raise CryptoError(e)
188
 
        self.gnupg.passphrase = None
189
 
        return ciphertext
190
 
    
191
 
    def decrypt(self, data, password):
192
 
        self.gnupg.passphrase = self.password_encode(password)
193
 
        with open(os.devnull) as devnull:
194
 
            try:
195
 
                proc = self.gnupg.run(['--decrypt'],
196
 
                                      create_fhs=['stdin', 'stdout'],
197
 
                                      attach_fhs={'stderr': devnull})
198
 
                with contextlib.closing(proc.handles['stdin'] ) as f:
199
 
                    f.write(data)
200
 
                with contextlib.closing(proc.handles['stdout']) as f:
201
 
                    decrypted_plaintext = f.read()
202
 
                proc.wait()
203
 
            except IOError as e:
204
 
                raise CryptoError(e)
205
 
        self.gnupg.passphrase = None
206
 
        return decrypted_plaintext
207
 
 
208
 
 
 
65
 
 
66
version = "1.0"
 
67
 
 
68
logger = logging.Logger('mandos')
 
69
syslogger = logging.handlers.SysLogHandler\
 
70
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
71
             address = "/dev/log")
 
72
syslogger.setFormatter(logging.Formatter\
 
73
                        ('Mandos: %(levelname)s: %(message)s'))
 
74
logger.addHandler(syslogger)
 
75
 
 
76
console = logging.StreamHandler()
 
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
 
78
                                       ' %(message)s'))
 
79
logger.addHandler(console)
209
80
 
210
81
class AvahiError(Exception):
211
 
    def __init__(self, value, *args, **kwargs):
 
82
    def __init__(self, value):
212
83
        self.value = value
213
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
214
 
    def __unicode__(self):
215
 
        return unicode(repr(self.value))
 
84
    def __str__(self):
 
85
        return repr(self.value)
216
86
 
217
87
class AvahiServiceError(AvahiError):
218
88
    pass
223
93
 
224
94
class AvahiService(object):
225
95
    """An Avahi (Zeroconf) service.
226
 
    
227
96
    Attributes:
228
97
    interface: integer; avahi.IF_UNSPEC or an interface index.
229
98
               Used to optionally bind to the specified interface.
237
106
    max_renames: integer; maximum number of renames
238
107
    rename_count: integer; counter so we only rename after collisions
239
108
                  a sensible number of times
240
 
    group: D-Bus Entry Group
241
 
    server: D-Bus Server
242
 
    bus: dbus.SystemBus()
243
109
    """
244
110
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
245
 
                 servicetype = None, port = None, TXT = None,
246
 
                 domain = "", host = "", max_renames = 32768,
247
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
111
                 type = None, port = None, TXT = None, domain = "",
 
112
                 host = "", max_renames = 32768):
248
113
        self.interface = interface
249
114
        self.name = name
250
 
        self.type = servicetype
 
115
        self.type = type
251
116
        self.port = port
252
 
        self.TXT = TXT if TXT is not None else []
 
117
        if TXT is None:
 
118
            self.TXT = []
 
119
        else:
 
120
            self.TXT = TXT
253
121
        self.domain = domain
254
122
        self.host = host
255
123
        self.rename_count = 0
256
124
        self.max_renames = max_renames
257
 
        self.protocol = protocol
258
 
        self.group = None       # our entry group
259
 
        self.server = None
260
 
        self.bus = bus
261
 
        self.entry_group_state_changed_match = None
262
125
    def rename(self):
263
126
        """Derived from the Avahi example code"""
264
127
        if self.rename_count >= self.max_renames:
265
 
            logger.critical("No suitable Zeroconf service name found"
266
 
                            " after %i retries, exiting.",
267
 
                            self.rename_count)
 
128
            logger.critical(u"No suitable Zeroconf service name found"
 
129
                            u" after %i retries, exiting.",
 
130
                            rename_count)
268
131
            raise AvahiServiceError("Too many renames")
269
 
        self.name = unicode(self.server
270
 
                            .GetAlternativeServiceName(self.name))
271
 
        logger.info("Changing Zeroconf service name to %r ...",
272
 
                    self.name)
 
132
        self.name = server.GetAlternativeServiceName(self.name)
 
133
        logger.info(u"Changing Zeroconf service name to %r ...",
 
134
                    str(self.name))
 
135
        syslogger.setFormatter(logging.Formatter\
 
136
                               ('Mandos (%s): %%(levelname)s:'
 
137
                               ' %%(message)s' % self.name))
273
138
        self.remove()
274
 
        try:
275
 
            self.add()
276
 
        except dbus.exceptions.DBusException as error:
277
 
            logger.critical("DBusException: %s", error)
278
 
            self.cleanup()
279
 
            os._exit(1)
 
139
        self.add()
280
140
        self.rename_count += 1
281
141
    def remove(self):
282
142
        """Derived from the Avahi example code"""
283
 
        if self.entry_group_state_changed_match is not None:
284
 
            self.entry_group_state_changed_match.remove()
285
 
            self.entry_group_state_changed_match = None
286
 
        if self.group is not None:
287
 
            self.group.Reset()
 
143
        if group is not None:
 
144
            group.Reset()
288
145
    def add(self):
289
146
        """Derived from the Avahi example code"""
290
 
        self.remove()
291
 
        if self.group is None:
292
 
            self.group = dbus.Interface(
293
 
                self.bus.get_object(avahi.DBUS_NAME,
294
 
                                    self.server.EntryGroupNew()),
295
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
296
 
        self.entry_group_state_changed_match = (
297
 
            self.group.connect_to_signal(
298
 
                'StateChanged', self.entry_group_state_changed))
299
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
300
 
                     self.name, self.type)
301
 
        self.group.AddService(
302
 
            self.interface,
303
 
            self.protocol,
304
 
            dbus.UInt32(0),     # flags
305
 
            self.name, self.type,
306
 
            self.domain, self.host,
307
 
            dbus.UInt16(self.port),
308
 
            avahi.string_array_to_txt_array(self.TXT))
309
 
        self.group.Commit()
310
 
    def entry_group_state_changed(self, state, error):
311
 
        """Derived from the Avahi example code"""
312
 
        logger.debug("Avahi entry group state change: %i", state)
313
 
        
314
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
315
 
            logger.debug("Zeroconf service established.")
316
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
317
 
            logger.info("Zeroconf service name collision.")
318
 
            self.rename()
319
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
320
 
            logger.critical("Avahi: Error in group state changed %s",
321
 
                            unicode(error))
322
 
            raise AvahiGroupError("State changed: %s"
323
 
                                  % unicode(error))
324
 
    def cleanup(self):
325
 
        """Derived from the Avahi example code"""
326
 
        if self.group is not None:
327
 
            try:
328
 
                self.group.Free()
329
 
            except (dbus.exceptions.UnknownMethodException,
330
 
                    dbus.exceptions.DBusException):
331
 
                pass
332
 
            self.group = None
333
 
        self.remove()
334
 
    def server_state_changed(self, state, error=None):
335
 
        """Derived from the Avahi example code"""
336
 
        logger.debug("Avahi server state change: %i", state)
337
 
        bad_states = { avahi.SERVER_INVALID:
338
 
                           "Zeroconf server invalid",
339
 
                       avahi.SERVER_REGISTERING: None,
340
 
                       avahi.SERVER_COLLISION:
341
 
                           "Zeroconf server name collision",
342
 
                       avahi.SERVER_FAILURE:
343
 
                           "Zeroconf server failure" }
344
 
        if state in bad_states:
345
 
            if bad_states[state] is not None:
346
 
                if error is None:
347
 
                    logger.error(bad_states[state])
348
 
                else:
349
 
                    logger.error(bad_states[state] + ": %r", error)
350
 
            self.cleanup()
351
 
        elif state == avahi.SERVER_RUNNING:
352
 
            self.add()
353
 
        else:
354
 
            if error is None:
355
 
                logger.debug("Unknown state: %r", state)
356
 
            else:
357
 
                logger.debug("Unknown state: %r: %r", state, error)
358
 
    def activate(self):
359
 
        """Derived from the Avahi example code"""
360
 
        if self.server is None:
361
 
            self.server = dbus.Interface(
362
 
                self.bus.get_object(avahi.DBUS_NAME,
363
 
                                    avahi.DBUS_PATH_SERVER,
364
 
                                    follow_name_owner_changes=True),
365
 
                avahi.DBUS_INTERFACE_SERVER)
366
 
        self.server.connect_to_signal("StateChanged",
367
 
                                 self.server_state_changed)
368
 
        self.server_state_changed(self.server.GetState())
369
 
 
370
 
class AvahiServiceToSyslog(AvahiService):
371
 
    def rename(self):
372
 
        """Add the new name to the syslog messages"""
373
 
        ret = AvahiService.rename(self)
374
 
        syslogger.setFormatter(logging.Formatter
375
 
                               ('Mandos (%s) [%%(process)d]:'
376
 
                                ' %%(levelname)s: %%(message)s'
377
 
                                % self.name))
378
 
        return ret
379
 
 
380
 
def _timedelta_to_milliseconds(td):
381
 
    "Convert a datetime.timedelta() to milliseconds"
382
 
    return ((td.days * 24 * 60 * 60 * 1000)
383
 
            + (td.seconds * 1000)
384
 
            + (td.microseconds // 1000))
385
 
        
 
147
        global group
 
148
        if group is None:
 
149
            group = dbus.Interface\
 
150
                    (bus.get_object(avahi.DBUS_NAME,
 
151
                                    server.EntryGroupNew()),
 
152
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
153
            group.connect_to_signal('StateChanged',
 
154
                                    entry_group_state_changed)
 
155
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
156
                     service.name, service.type)
 
157
        group.AddService(
 
158
                self.interface,         # interface
 
159
                avahi.PROTO_INET6,      # protocol
 
160
                dbus.UInt32(0),         # flags
 
161
                self.name, self.type,
 
162
                self.domain, self.host,
 
163
                dbus.UInt16(self.port),
 
164
                avahi.string_array_to_txt_array(self.TXT))
 
165
        group.Commit()
 
166
 
 
167
# From the Avahi example code:
 
168
group = None                            # our entry group
 
169
# End of Avahi example code
 
170
 
 
171
 
386
172
class Client(object):
387
173
    """A representation of a client host served by this server.
388
 
    
389
174
    Attributes:
390
 
    _approved:   bool(); 'None' if not yet approved/disapproved
391
 
    approval_delay: datetime.timedelta(); Time to wait for approval
392
 
    approval_duration: datetime.timedelta(); Duration of one approval
393
 
    checker:    subprocess.Popen(); a running checker process used
394
 
                                    to see if the client lives.
395
 
                                    'None' if no process is running.
396
 
    checker_callback_tag: a gobject event source tag, or None
397
 
    checker_command: string; External command which is run to check
398
 
                     if client lives.  %() expansions are done at
 
175
    name:      string; from the config file, used in log messages
 
176
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
177
                 uniquely identify the client
 
178
    secret:    bytestring; sent verbatim (over TLS) to client
 
179
    host:      string; available for use by the checker command
 
180
    created:   datetime.datetime(); object creation, not client host
 
181
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
182
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
183
                                     until this client is invalid
 
184
    interval:  datetime.timedelta(); How often to start a new checker
 
185
    stop_hook: If set, called by stop() as stop_hook(self)
 
186
    checker:   subprocess.Popen(); a running checker process used
 
187
                                   to see if the client lives.
 
188
                                   'None' if no process is running.
 
189
    checker_initiator_tag: a gobject event source tag, or None
 
190
    stop_initiator_tag:    - '' -
 
191
    checker_callback_tag:  - '' -
 
192
    checker_command: string; External command which is run to check if
 
193
                     client lives.  %() expansions are done at
399
194
                     runtime with vars(self) as dict, so that for
400
195
                     instance %(name)s can be used in the command.
401
 
    checker_initiator_tag: a gobject event source tag, or None
402
 
    created:    datetime.datetime(); (UTC) object creation
403
 
    client_structure: Object describing what attributes a client has
404
 
                      and is used for storing the client at exit
405
 
    current_checker_command: string; current running checker_command
406
 
    disable_initiator_tag: a gobject event source tag, or None
407
 
    enabled:    bool()
408
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
409
 
                 uniquely identify the client
410
 
    host:       string; available for use by the checker command
411
 
    interval:   datetime.timedelta(); How often to start a new checker
412
 
    last_approval_request: datetime.datetime(); (UTC) or None
413
 
    last_checked_ok: datetime.datetime(); (UTC) or None
414
 
 
415
 
    last_checker_status: integer between 0 and 255 reflecting exit
416
 
                         status of last checker. -1 reflects crashed
417
 
                         checker, or None.
418
 
    last_enabled: datetime.datetime(); (UTC) or None
419
 
    name:       string; from the config file, used in log messages and
420
 
                        D-Bus identifiers
421
 
    secret:     bytestring; sent verbatim (over TLS) to client
422
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
423
 
                                      until this client is disabled
424
 
    extended_timeout:   extra long timeout when password has been sent
425
 
    runtime_expansions: Allowed attributes for runtime expansion.
426
 
    expires:    datetime.datetime(); time (UTC) when a client will be
427
 
                disabled, or None
 
196
    Private attibutes:
 
197
    _timeout: Real variable for 'timeout'
 
198
    _interval: Real variable for 'interval'
 
199
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
200
    _interval_milliseconds: - '' -
428
201
    """
429
 
    
430
 
    runtime_expansions = ("approval_delay", "approval_duration",
431
 
                          "created", "enabled", "fingerprint",
432
 
                          "host", "interval", "last_checked_ok",
433
 
                          "last_enabled", "name", "timeout")
434
 
    
435
 
    def timeout_milliseconds(self):
436
 
        "Return the 'timeout' attribute in milliseconds"
437
 
        return _timedelta_to_milliseconds(self.timeout)
438
 
    
439
 
    def extended_timeout_milliseconds(self):
440
 
        "Return the 'extended_timeout' attribute in milliseconds"
441
 
        return _timedelta_to_milliseconds(self.extended_timeout)
442
 
    
443
 
    def interval_milliseconds(self):
444
 
        "Return the 'interval' attribute in milliseconds"
445
 
        return _timedelta_to_milliseconds(self.interval)
446
 
    
447
 
    def approval_delay_milliseconds(self):
448
 
        return _timedelta_to_milliseconds(self.approval_delay)
449
 
    
450
 
    def __init__(self, name = None, config=None):
 
202
    def _set_timeout(self, timeout):
 
203
        "Setter function for 'timeout' attribute"
 
204
        self._timeout = timeout
 
205
        self._timeout_milliseconds = ((self.timeout.days
 
206
                                       * 24 * 60 * 60 * 1000)
 
207
                                      + (self.timeout.seconds * 1000)
 
208
                                      + (self.timeout.microseconds
 
209
                                         // 1000))
 
210
    timeout = property(lambda self: self._timeout,
 
211
                       _set_timeout)
 
212
    del _set_timeout
 
213
    def _set_interval(self, interval):
 
214
        "Setter function for 'interval' attribute"
 
215
        self._interval = interval
 
216
        self._interval_milliseconds = ((self.interval.days
 
217
                                        * 24 * 60 * 60 * 1000)
 
218
                                       + (self.interval.seconds
 
219
                                          * 1000)
 
220
                                       + (self.interval.microseconds
 
221
                                          // 1000))
 
222
    interval = property(lambda self: self._interval,
 
223
                        _set_interval)
 
224
    del _set_interval
 
225
    def __init__(self, name = None, stop_hook=None, config={}):
451
226
        """Note: the 'checker' key in 'config' sets the
452
227
        'checker_command' attribute and *not* the 'checker'
453
228
        attribute."""
454
229
        self.name = name
455
 
        if config is None:
456
 
            config = {}
457
 
        logger.debug("Creating client %r", self.name)
 
230
        logger.debug(u"Creating client %r", self.name)
458
231
        # Uppercase and remove spaces from fingerprint for later
459
232
        # comparison purposes with return value from the fingerprint()
460
233
        # function
461
 
        self.fingerprint = (config["fingerprint"].upper()
462
 
                            .replace(" ", ""))
463
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
 
234
        self.fingerprint = config["fingerprint"].upper()\
 
235
                           .replace(u" ", u"")
 
236
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
464
237
        if "secret" in config:
465
 
            self.secret = config["secret"].decode("base64")
 
238
            self.secret = config["secret"].decode(u"base64")
466
239
        elif "secfile" in config:
467
 
            with open(os.path.expanduser(os.path.expandvars
468
 
                                         (config["secfile"])),
469
 
                      "rb") as secfile:
470
 
                self.secret = secfile.read()
 
240
            sf = open(config["secfile"])
 
241
            self.secret = sf.read()
 
242
            sf.close()
471
243
        else:
472
 
            raise TypeError("No secret or secfile for client %s"
 
244
            raise TypeError(u"No secret or secfile for client %s"
473
245
                            % self.name)
474
246
        self.host = config.get("host", "")
475
 
        self.created = datetime.datetime.utcnow()
476
 
        self.enabled = config.get("enabled", True)
477
 
        self.last_approval_request = None
478
 
        if self.enabled:
479
 
            self.last_enabled = datetime.datetime.utcnow()
480
 
        else:
481
 
            self.last_enabled = None
 
247
        self.created = datetime.datetime.now()
482
248
        self.last_checked_ok = None
483
 
        self.last_checker_status = None
484
249
        self.timeout = string_to_delta(config["timeout"])
485
 
        self.extended_timeout = string_to_delta(config
486
 
                                                ["extended_timeout"])
487
250
        self.interval = string_to_delta(config["interval"])
 
251
        self.stop_hook = stop_hook
488
252
        self.checker = None
489
253
        self.checker_initiator_tag = None
490
 
        self.disable_initiator_tag = None
491
 
        if self.enabled:
492
 
            self.expires = datetime.datetime.utcnow() + self.timeout
493
 
        else:
494
 
            self.expires = None
 
254
        self.stop_initiator_tag = None
495
255
        self.checker_callback_tag = None
496
 
        self.checker_command = config["checker"]
497
 
        self.current_checker_command = None
498
 
        self._approved = None
499
 
        self.approved_by_default = config.get("approved_by_default",
500
 
                                              True)
501
 
        self.approvals_pending = 0
502
 
        self.approval_delay = string_to_delta(
503
 
            config["approval_delay"])
504
 
        self.approval_duration = string_to_delta(
505
 
            config["approval_duration"])
506
 
        self.changedstate = (multiprocessing_manager
507
 
                             .Condition(multiprocessing_manager
508
 
                                        .Lock()))
509
 
        self.client_structure = [attr for attr in
510
 
                                 self.__dict__.iterkeys()
511
 
                                 if not attr.startswith("_")]
512
 
        self.client_structure.append("client_structure")
513
 
        
514
 
        for name, t in inspect.getmembers(type(self),
515
 
                                          lambda obj:
516
 
                                              isinstance(obj,
517
 
                                                         property)):
518
 
            if not name.startswith("_"):
519
 
                self.client_structure.append(name)
520
 
    
521
 
    # Send notice to process children that client state has changed
522
 
    def send_changedstate(self):
523
 
        with self.changedstate:
524
 
            self.changedstate.notify_all()
525
 
    
526
 
    def enable(self):
 
256
        self.check_command = config["checker"]
 
257
    def start(self):
527
258
        """Start this client's checker and timeout hooks"""
528
 
        if getattr(self, "enabled", False):
529
 
            # Already enabled
530
 
            return
531
 
        self.send_changedstate()
532
 
        self.expires = datetime.datetime.utcnow() + self.timeout
533
 
        self.enabled = True
534
 
        self.last_enabled = datetime.datetime.utcnow()
535
 
        self.init_checker()
536
 
    
537
 
    def disable(self, quiet=True):
538
 
        """Disable this client."""
539
 
        if not getattr(self, "enabled", False):
 
259
        # Schedule a new checker to be started an 'interval' from now,
 
260
        # and every interval from then on.
 
261
        self.checker_initiator_tag = gobject.timeout_add\
 
262
                                     (self._interval_milliseconds,
 
263
                                      self.start_checker)
 
264
        # Also start a new checker *right now*.
 
265
        self.start_checker()
 
266
        # Schedule a stop() when 'timeout' has passed
 
267
        self.stop_initiator_tag = gobject.timeout_add\
 
268
                                  (self._timeout_milliseconds,
 
269
                                   self.stop)
 
270
    def stop(self):
 
271
        """Stop this client.
 
272
        The possibility that a client might be restarted is left open,
 
273
        but not currently used."""
 
274
        # If this client doesn't have a secret, it is already stopped.
 
275
        if hasattr(self, "secret") and self.secret:
 
276
            logger.info(u"Stopping client %s", self.name)
 
277
            self.secret = None
 
278
        else:
540
279
            return False
541
 
        if not quiet:
542
 
            self.send_changedstate()
543
 
        if not quiet:
544
 
            logger.info("Disabling client %s", self.name)
545
 
        if getattr(self, "disable_initiator_tag", False):
546
 
            gobject.source_remove(self.disable_initiator_tag)
547
 
            self.disable_initiator_tag = None
548
 
        self.expires = None
 
280
        if getattr(self, "stop_initiator_tag", False):
 
281
            gobject.source_remove(self.stop_initiator_tag)
 
282
            self.stop_initiator_tag = None
549
283
        if getattr(self, "checker_initiator_tag", False):
550
284
            gobject.source_remove(self.checker_initiator_tag)
551
285
            self.checker_initiator_tag = None
552
286
        self.stop_checker()
553
 
        self.enabled = False
 
287
        if self.stop_hook:
 
288
            self.stop_hook(self)
554
289
        # Do not run this again if called by a gobject.timeout_add
555
290
        return False
556
 
    
557
291
    def __del__(self):
558
 
        self.disable()
559
 
    
560
 
    def init_checker(self):
561
 
        # Schedule a new checker to be started an 'interval' from now,
562
 
        # and every interval from then on.
563
 
        self.checker_initiator_tag = (gobject.timeout_add
564
 
                                      (self.interval_milliseconds(),
565
 
                                       self.start_checker))
566
 
        # Schedule a disable() when 'timeout' has passed
567
 
        self.disable_initiator_tag = (gobject.timeout_add
568
 
                                   (self.timeout_milliseconds(),
569
 
                                    self.disable))
570
 
        # Also start a new checker *right now*.
571
 
        self.start_checker()
572
 
    
573
 
    def checker_callback(self, pid, condition, command):
 
292
        self.stop_hook = None
 
293
        self.stop()
 
294
    def checker_callback(self, pid, condition):
574
295
        """The checker has completed, so take appropriate actions."""
 
296
        now = datetime.datetime.now()
575
297
        self.checker_callback_tag = None
576
298
        self.checker = None
577
 
        if os.WIFEXITED(condition):
578
 
            self.last_checker_status =  os.WEXITSTATUS(condition)
579
 
            if self.last_checker_status == 0:
580
 
                logger.info("Checker for %(name)s succeeded",
581
 
                            vars(self))
582
 
                self.checked_ok()
583
 
            else:
584
 
                logger.info("Checker for %(name)s failed",
585
 
                            vars(self))
586
 
        else:
587
 
            self.last_checker_status = -1
588
 
            logger.warning("Checker for %(name)s crashed?",
 
299
        if os.WIFEXITED(condition) \
 
300
               and (os.WEXITSTATUS(condition) == 0):
 
301
            logger.info(u"Checker for %(name)s succeeded",
 
302
                        vars(self))
 
303
            self.last_checked_ok = now
 
304
            gobject.source_remove(self.stop_initiator_tag)
 
305
            self.stop_initiator_tag = gobject.timeout_add\
 
306
                                      (self._timeout_milliseconds,
 
307
                                       self.stop)
 
308
        elif not os.WIFEXITED(condition):
 
309
            logger.warning(u"Checker for %(name)s crashed?",
589
310
                           vars(self))
590
 
    
591
 
    def checked_ok(self, timeout=None):
592
 
        """Bump up the timeout for this client.
593
 
        
594
 
        This should only be called when the client has been seen,
595
 
        alive and well.
596
 
        """
597
 
        if timeout is None:
598
 
            timeout = self.timeout
599
 
        self.last_checked_ok = datetime.datetime.utcnow()
600
 
        if self.disable_initiator_tag is not None:
601
 
            gobject.source_remove(self.disable_initiator_tag)
602
 
        if getattr(self, "enabled", False):
603
 
            self.disable_initiator_tag = (gobject.timeout_add
604
 
                                          (_timedelta_to_milliseconds
605
 
                                           (timeout), self.disable))
606
 
            self.expires = datetime.datetime.utcnow() + timeout
607
 
    
608
 
    def need_approval(self):
609
 
        self.last_approval_request = datetime.datetime.utcnow()
610
 
    
 
311
        else:
 
312
            logger.info(u"Checker for %(name)s failed",
 
313
                        vars(self))
611
314
    def start_checker(self):
612
315
        """Start a new checker subprocess if one is not running.
613
 
        
614
316
        If a checker already exists, leave it running and do
615
317
        nothing."""
616
318
        # The reason for not killing a running checker is that if we
619
321
        # client would inevitably timeout, since no checker would get
620
322
        # a chance to run to completion.  If we instead leave running
621
323
        # checkers alone, the checker would have to take more time
622
 
        # than 'timeout' for the client to be disabled, which is as it
623
 
        # should be.
624
 
        
625
 
        # If a checker exists, make sure it is not a zombie
626
 
        try:
627
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
628
 
        except (AttributeError, OSError) as error:
629
 
            if (isinstance(error, OSError)
630
 
                and error.errno != errno.ECHILD):
631
 
                raise error
632
 
        else:
633
 
            if pid:
634
 
                logger.warning("Checker was a zombie")
635
 
                gobject.source_remove(self.checker_callback_tag)
636
 
                self.checker_callback(pid, status,
637
 
                                      self.current_checker_command)
638
 
        # Start a new checker if needed
 
324
        # than 'timeout' for the client to be declared invalid, which
 
325
        # is as it should be.
639
326
        if self.checker is None:
640
327
            try:
641
 
                # In case checker_command has exactly one % operator
642
 
                command = self.checker_command % self.host
 
328
                # In case check_command has exactly one % operator
 
329
                command = self.check_command % self.host
643
330
            except TypeError:
644
331
                # Escape attributes for the shell
645
 
                escaped_attrs = dict(
646
 
                    (attr,
647
 
                     re.escape(unicode(str(getattr(self, attr, "")),
648
 
                                       errors=
649
 
                                       'replace')))
650
 
                    for attr in
651
 
                    self.runtime_expansions)
652
 
                
 
332
                escaped_attrs = dict((key, re.escape(str(val)))
 
333
                                     for key, val in
 
334
                                     vars(self).iteritems())
653
335
                try:
654
 
                    command = self.checker_command % escaped_attrs
655
 
                except TypeError as error:
656
 
                    logger.error('Could not format string "%s":'
657
 
                                 ' %s', self.checker_command, error)
 
336
                    command = self.check_command % escaped_attrs
 
337
                except TypeError, error:
 
338
                    logger.error(u'Could not format string "%s":'
 
339
                                 u' %s', self.check_command, error)
658
340
                    return True # Try again later
659
 
            self.current_checker_command = command
660
341
            try:
661
 
                logger.info("Starting checker %r for %s",
 
342
                logger.info(u"Starting checker %r for %s",
662
343
                            command, self.name)
663
344
                # We don't need to redirect stdout and stderr, since
664
345
                # in normal mode, that is already done by daemon(),
667
348
                self.checker = subprocess.Popen(command,
668
349
                                                close_fds=True,
669
350
                                                shell=True, cwd="/")
670
 
                self.checker_callback_tag = (gobject.child_watch_add
671
 
                                             (self.checker.pid,
672
 
                                              self.checker_callback,
673
 
                                              data=command))
674
 
                # The checker may have completed before the gobject
675
 
                # watch was added.  Check for this.
676
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
677
 
                if pid:
678
 
                    gobject.source_remove(self.checker_callback_tag)
679
 
                    self.checker_callback(pid, status, command)
680
 
            except OSError as error:
681
 
                logger.error("Failed to start subprocess: %s",
 
351
                self.checker_callback_tag = gobject.child_watch_add\
 
352
                                            (self.checker.pid,
 
353
                                             self.checker_callback)
 
354
            except OSError, error:
 
355
                logger.error(u"Failed to start subprocess: %s",
682
356
                             error)
683
357
        # Re-run this periodically if run by gobject.timeout_add
684
358
        return True
685
 
    
686
359
    def stop_checker(self):
687
360
        """Force the checker process, if any, to stop."""
688
361
        if self.checker_callback_tag:
690
363
            self.checker_callback_tag = None
691
364
        if getattr(self, "checker", None) is None:
692
365
            return
693
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
366
        logger.debug(u"Stopping checker for %(name)s", vars(self))
694
367
        try:
695
368
            os.kill(self.checker.pid, signal.SIGTERM)
696
 
            #time.sleep(0.5)
 
369
            #os.sleep(0.5)
697
370
            #if self.checker.poll() is None:
698
371
            #    os.kill(self.checker.pid, signal.SIGKILL)
699
 
        except OSError as error:
 
372
        except OSError, error:
700
373
            if error.errno != errno.ESRCH: # No such process
701
374
                raise
702
375
        self.checker = None
703
 
 
704
 
 
705
 
def dbus_service_property(dbus_interface, signature="v",
706
 
                          access="readwrite", byte_arrays=False):
707
 
    """Decorators for marking methods of a DBusObjectWithProperties to
708
 
    become properties on the D-Bus.
709
 
    
710
 
    The decorated method will be called with no arguments by "Get"
711
 
    and with one argument by "Set".
712
 
    
713
 
    The parameters, where they are supported, are the same as
714
 
    dbus.service.method, except there is only "signature", since the
715
 
    type from Get() and the type sent to Set() is the same.
716
 
    """
717
 
    # Encoding deeply encoded byte arrays is not supported yet by the
718
 
    # "Set" method, so we fail early here:
719
 
    if byte_arrays and signature != "ay":
720
 
        raise ValueError("Byte arrays not supported for non-'ay'"
721
 
                         " signature %r" % signature)
722
 
    def decorator(func):
723
 
        func._dbus_is_property = True
724
 
        func._dbus_interface = dbus_interface
725
 
        func._dbus_signature = signature
726
 
        func._dbus_access = access
727
 
        func._dbus_name = func.__name__
728
 
        if func._dbus_name.endswith("_dbus_property"):
729
 
            func._dbus_name = func._dbus_name[:-14]
730
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
731
 
        return func
732
 
    return decorator
733
 
 
734
 
 
735
 
class DBusPropertyException(dbus.exceptions.DBusException):
736
 
    """A base class for D-Bus property-related exceptions
737
 
    """
738
 
    def __unicode__(self):
739
 
        return unicode(str(self))
740
 
 
741
 
 
742
 
class DBusPropertyAccessException(DBusPropertyException):
743
 
    """A property's access permissions disallows an operation.
744
 
    """
745
 
    pass
746
 
 
747
 
 
748
 
class DBusPropertyNotFound(DBusPropertyException):
749
 
    """An attempt was made to access a non-existing property.
750
 
    """
751
 
    pass
752
 
 
753
 
 
754
 
class DBusObjectWithProperties(dbus.service.Object):
755
 
    """A D-Bus object with properties.
756
 
    
757
 
    Classes inheriting from this can use the dbus_service_property
758
 
    decorator to expose methods as D-Bus properties.  It exposes the
759
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
760
 
    """
761
 
    
762
 
    @staticmethod
763
 
    def _is_dbus_property(obj):
764
 
        return getattr(obj, "_dbus_is_property", False)
765
 
    
766
 
    def _get_all_dbus_properties(self):
767
 
        """Returns a generator of (name, attribute) pairs
768
 
        """
769
 
        return ((prop.__get__(self)._dbus_name, prop.__get__(self))
770
 
                for cls in self.__class__.__mro__
771
 
                for name, prop in
772
 
                inspect.getmembers(cls, self._is_dbus_property))
773
 
    
774
 
    def _get_dbus_property(self, interface_name, property_name):
775
 
        """Returns a bound method if one exists which is a D-Bus
776
 
        property with the specified name and interface.
777
 
        """
778
 
        for cls in  self.__class__.__mro__:
779
 
            for name, value in (inspect.getmembers
780
 
                                (cls, self._is_dbus_property)):
781
 
                if (value._dbus_name == property_name
782
 
                    and value._dbus_interface == interface_name):
783
 
                    return value.__get__(self)
784
 
        
785
 
        # No such property
786
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
787
 
                                   + interface_name + "."
788
 
                                   + property_name)
789
 
    
790
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
791
 
                         out_signature="v")
792
 
    def Get(self, interface_name, property_name):
793
 
        """Standard D-Bus property Get() method, see D-Bus standard.
794
 
        """
795
 
        prop = self._get_dbus_property(interface_name, property_name)
796
 
        if prop._dbus_access == "write":
797
 
            raise DBusPropertyAccessException(property_name)
798
 
        value = prop()
799
 
        if not hasattr(value, "variant_level"):
800
 
            return value
801
 
        return type(value)(value, variant_level=value.variant_level+1)
802
 
    
803
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
804
 
    def Set(self, interface_name, property_name, value):
805
 
        """Standard D-Bus property Set() method, see D-Bus standard.
806
 
        """
807
 
        prop = self._get_dbus_property(interface_name, property_name)
808
 
        if prop._dbus_access == "read":
809
 
            raise DBusPropertyAccessException(property_name)
810
 
        if prop._dbus_get_args_options["byte_arrays"]:
811
 
            # The byte_arrays option is not supported yet on
812
 
            # signatures other than "ay".
813
 
            if prop._dbus_signature != "ay":
814
 
                raise ValueError
815
 
            value = dbus.ByteArray(''.join(unichr(byte)
816
 
                                           for byte in value))
817
 
        prop(value)
818
 
    
819
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
820
 
                         out_signature="a{sv}")
821
 
    def GetAll(self, interface_name):
822
 
        """Standard D-Bus property GetAll() method, see D-Bus
823
 
        standard.
824
 
        
825
 
        Note: Will not include properties with access="write".
826
 
        """
827
 
        properties = {}
828
 
        for name, prop in self._get_all_dbus_properties():
829
 
            if (interface_name
830
 
                and interface_name != prop._dbus_interface):
831
 
                # Interface non-empty but did not match
832
 
                continue
833
 
            # Ignore write-only properties
834
 
            if prop._dbus_access == "write":
835
 
                continue
836
 
            value = prop()
837
 
            if not hasattr(value, "variant_level"):
838
 
                properties[name] = value
839
 
                continue
840
 
            properties[name] = type(value)(value, variant_level=
841
 
                                           value.variant_level+1)
842
 
        return dbus.Dictionary(properties, signature="sv")
843
 
    
844
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
845
 
                         out_signature="s",
846
 
                         path_keyword='object_path',
847
 
                         connection_keyword='connection')
848
 
    def Introspect(self, object_path, connection):
849
 
        """Standard D-Bus method, overloaded to insert property tags.
850
 
        """
851
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
852
 
                                                   connection)
853
 
        try:
854
 
            document = xml.dom.minidom.parseString(xmlstring)
855
 
            def make_tag(document, name, prop):
856
 
                e = document.createElement("property")
857
 
                e.setAttribute("name", name)
858
 
                e.setAttribute("type", prop._dbus_signature)
859
 
                e.setAttribute("access", prop._dbus_access)
860
 
                return e
861
 
            for if_tag in document.getElementsByTagName("interface"):
862
 
                for tag in (make_tag(document, name, prop)
863
 
                            for name, prop
864
 
                            in self._get_all_dbus_properties()
865
 
                            if prop._dbus_interface
866
 
                            == if_tag.getAttribute("name")):
867
 
                    if_tag.appendChild(tag)
868
 
                # Add the names to the return values for the
869
 
                # "org.freedesktop.DBus.Properties" methods
870
 
                if (if_tag.getAttribute("name")
871
 
                    == "org.freedesktop.DBus.Properties"):
872
 
                    for cn in if_tag.getElementsByTagName("method"):
873
 
                        if cn.getAttribute("name") == "Get":
874
 
                            for arg in cn.getElementsByTagName("arg"):
875
 
                                if (arg.getAttribute("direction")
876
 
                                    == "out"):
877
 
                                    arg.setAttribute("name", "value")
878
 
                        elif cn.getAttribute("name") == "GetAll":
879
 
                            for arg in cn.getElementsByTagName("arg"):
880
 
                                if (arg.getAttribute("direction")
881
 
                                    == "out"):
882
 
                                    arg.setAttribute("name", "props")
883
 
            xmlstring = document.toxml("utf-8")
884
 
            document.unlink()
885
 
        except (AttributeError, xml.dom.DOMException,
886
 
                xml.parsers.expat.ExpatError) as error:
887
 
            logger.error("Failed to override Introspection method",
888
 
                         error)
889
 
        return xmlstring
890
 
 
891
 
 
892
 
def datetime_to_dbus (dt, variant_level=0):
893
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
894
 
    if dt is None:
895
 
        return dbus.String("", variant_level = variant_level)
896
 
    return dbus.String(dt.isoformat(),
897
 
                       variant_level=variant_level)
898
 
 
899
 
 
900
 
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
901
 
                                  .__metaclass__):
902
 
    """Applied to an empty subclass of a D-Bus object, this metaclass
903
 
    will add additional D-Bus attributes matching a certain pattern.
904
 
    """
905
 
    def __new__(mcs, name, bases, attr):
906
 
        # Go through all the base classes which could have D-Bus
907
 
        # methods, signals, or properties in them
908
 
        for base in (b for b in bases
909
 
                     if issubclass(b, dbus.service.Object)):
910
 
            # Go though all attributes of the base class
911
 
            for attrname, attribute in inspect.getmembers(base):
912
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
913
 
                # with the wrong interface name
914
 
                if (not hasattr(attribute, "_dbus_interface")
915
 
                    or not attribute._dbus_interface
916
 
                    .startswith("se.recompile.Mandos")):
917
 
                    continue
918
 
                # Create an alternate D-Bus interface name based on
919
 
                # the current name
920
 
                alt_interface = (attribute._dbus_interface
921
 
                                 .replace("se.recompile.Mandos",
922
 
                                          "se.bsnet.fukt.Mandos"))
923
 
                # Is this a D-Bus signal?
924
 
                if getattr(attribute, "_dbus_is_signal", False):
925
 
                    # Extract the original non-method function by
926
 
                    # black magic
927
 
                    nonmethod_func = (dict(
928
 
                            zip(attribute.func_code.co_freevars,
929
 
                                attribute.__closure__))["func"]
930
 
                                      .cell_contents)
931
 
                    # Create a new, but exactly alike, function
932
 
                    # object, and decorate it to be a new D-Bus signal
933
 
                    # with the alternate D-Bus interface name
934
 
                    new_function = (dbus.service.signal
935
 
                                    (alt_interface,
936
 
                                     attribute._dbus_signature)
937
 
                                    (types.FunctionType(
938
 
                                nonmethod_func.func_code,
939
 
                                nonmethod_func.func_globals,
940
 
                                nonmethod_func.func_name,
941
 
                                nonmethod_func.func_defaults,
942
 
                                nonmethod_func.func_closure)))
943
 
                    # Define a creator of a function to call both the
944
 
                    # old and new functions, so both the old and new
945
 
                    # signals gets sent when the function is called
946
 
                    def fixscope(func1, func2):
947
 
                        """This function is a scope container to pass
948
 
                        func1 and func2 to the "call_both" function
949
 
                        outside of its arguments"""
950
 
                        def call_both(*args, **kwargs):
951
 
                            """This function will emit two D-Bus
952
 
                            signals by calling func1 and func2"""
953
 
                            func1(*args, **kwargs)
954
 
                            func2(*args, **kwargs)
955
 
                        return call_both
956
 
                    # Create the "call_both" function and add it to
957
 
                    # the class
958
 
                    attr[attrname] = fixscope(attribute,
959
 
                                              new_function)
960
 
                # Is this a D-Bus method?
961
 
                elif getattr(attribute, "_dbus_is_method", False):
962
 
                    # Create a new, but exactly alike, function
963
 
                    # object.  Decorate it to be a new D-Bus method
964
 
                    # with the alternate D-Bus interface name.  Add it
965
 
                    # to the class.
966
 
                    attr[attrname] = (dbus.service.method
967
 
                                      (alt_interface,
968
 
                                       attribute._dbus_in_signature,
969
 
                                       attribute._dbus_out_signature)
970
 
                                      (types.FunctionType
971
 
                                       (attribute.func_code,
972
 
                                        attribute.func_globals,
973
 
                                        attribute.func_name,
974
 
                                        attribute.func_defaults,
975
 
                                        attribute.func_closure)))
976
 
                # Is this a D-Bus property?
977
 
                elif getattr(attribute, "_dbus_is_property", False):
978
 
                    # Create a new, but exactly alike, function
979
 
                    # object, and decorate it to be a new D-Bus
980
 
                    # property with the alternate D-Bus interface
981
 
                    # name.  Add it to the class.
982
 
                    attr[attrname] = (dbus_service_property
983
 
                                      (alt_interface,
984
 
                                       attribute._dbus_signature,
985
 
                                       attribute._dbus_access,
986
 
                                       attribute
987
 
                                       ._dbus_get_args_options
988
 
                                       ["byte_arrays"])
989
 
                                      (types.FunctionType
990
 
                                       (attribute.func_code,
991
 
                                        attribute.func_globals,
992
 
                                        attribute.func_name,
993
 
                                        attribute.func_defaults,
994
 
                                        attribute.func_closure)))
995
 
        return type.__new__(mcs, name, bases, attr)
996
 
 
997
 
 
998
 
class ClientDBus(Client, DBusObjectWithProperties):
999
 
    """A Client class using D-Bus
1000
 
    
1001
 
    Attributes:
1002
 
    dbus_object_path: dbus.ObjectPath
1003
 
    bus: dbus.SystemBus()
1004
 
    """
1005
 
    
1006
 
    runtime_expansions = (Client.runtime_expansions
1007
 
                          + ("dbus_object_path",))
1008
 
    
1009
 
    # dbus.service.Object doesn't use super(), so we can't either.
1010
 
    
1011
 
    def __init__(self, bus = None, *args, **kwargs):
1012
 
        self.bus = bus
1013
 
        Client.__init__(self, *args, **kwargs)
1014
 
        
1015
 
        self._approvals_pending = 0
1016
 
        # Only now, when this client is initialized, can it show up on
1017
 
        # the D-Bus
1018
 
        client_object_name = unicode(self.name).translate(
1019
 
            {ord("."): ord("_"),
1020
 
             ord("-"): ord("_")})
1021
 
        self.dbus_object_path = (dbus.ObjectPath
1022
 
                                 ("/clients/" + client_object_name))
1023
 
        DBusObjectWithProperties.__init__(self, self.bus,
1024
 
                                          self.dbus_object_path)
1025
 
        
1026
 
    def notifychangeproperty(transform_func,
1027
 
                             dbus_name, type_func=lambda x: x,
1028
 
                             variant_level=1):
1029
 
        """ Modify a variable so that it's a property which announces
1030
 
        its changes to DBus.
1031
 
        
1032
 
        transform_fun: Function that takes a value and a variant_level
1033
 
                       and transforms it to a D-Bus type.
1034
 
        dbus_name: D-Bus name of the variable
1035
 
        type_func: Function that transform the value before sending it
1036
 
                   to the D-Bus.  Default: no transform
1037
 
        variant_level: D-Bus variant level.  Default: 1
1038
 
        """
1039
 
        attrname = "_{0}".format(dbus_name)
1040
 
        def setter(self, value):
1041
 
            if hasattr(self, "dbus_object_path"):
1042
 
                if (not hasattr(self, attrname) or
1043
 
                    type_func(getattr(self, attrname, None))
1044
 
                    != type_func(value)):
1045
 
                    dbus_value = transform_func(type_func(value),
1046
 
                                                variant_level
1047
 
                                                =variant_level)
1048
 
                    self.PropertyChanged(dbus.String(dbus_name),
1049
 
                                         dbus_value)
1050
 
            setattr(self, attrname, value)
1051
 
        
1052
 
        return property(lambda self: getattr(self, attrname), setter)
1053
 
    
1054
 
    
1055
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1056
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
1057
 
                                             "ApprovalPending",
1058
 
                                             type_func = bool)
1059
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1060
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
1061
 
                                        "LastEnabled")
1062
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
1063
 
                                   type_func = lambda checker:
1064
 
                                       checker is not None)
1065
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1066
 
                                           "LastCheckedOK")
1067
 
    last_approval_request = notifychangeproperty(
1068
 
        datetime_to_dbus, "LastApprovalRequest")
1069
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
1070
 
                                               "ApprovedByDefault")
1071
 
    approval_delay = notifychangeproperty(dbus.UInt16,
1072
 
                                          "ApprovalDelay",
1073
 
                                          type_func =
1074
 
                                          _timedelta_to_milliseconds)
1075
 
    approval_duration = notifychangeproperty(
1076
 
        dbus.UInt16, "ApprovalDuration",
1077
 
        type_func = _timedelta_to_milliseconds)
1078
 
    host = notifychangeproperty(dbus.String, "Host")
1079
 
    timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1080
 
                                   type_func =
1081
 
                                   _timedelta_to_milliseconds)
1082
 
    extended_timeout = notifychangeproperty(
1083
 
        dbus.UInt16, "ExtendedTimeout",
1084
 
        type_func = _timedelta_to_milliseconds)
1085
 
    interval = notifychangeproperty(dbus.UInt16,
1086
 
                                    "Interval",
1087
 
                                    type_func =
1088
 
                                    _timedelta_to_milliseconds)
1089
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1090
 
    
1091
 
    del notifychangeproperty
1092
 
    
1093
 
    def __del__(self, *args, **kwargs):
1094
 
        try:
1095
 
            self.remove_from_connection()
1096
 
        except LookupError:
1097
 
            pass
1098
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1099
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1100
 
        Client.__del__(self, *args, **kwargs)
1101
 
    
1102
 
    def checker_callback(self, pid, condition, command,
1103
 
                         *args, **kwargs):
1104
 
        self.checker_callback_tag = None
1105
 
        self.checker = None
1106
 
        if os.WIFEXITED(condition):
1107
 
            exitstatus = os.WEXITSTATUS(condition)
1108
 
            # Emit D-Bus signal
1109
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1110
 
                                  dbus.Int64(condition),
1111
 
                                  dbus.String(command))
1112
 
        else:
1113
 
            # Emit D-Bus signal
1114
 
            self.CheckerCompleted(dbus.Int16(-1),
1115
 
                                  dbus.Int64(condition),
1116
 
                                  dbus.String(command))
1117
 
        
1118
 
        return Client.checker_callback(self, pid, condition, command,
1119
 
                                       *args, **kwargs)
1120
 
    
1121
 
    def start_checker(self, *args, **kwargs):
1122
 
        old_checker = self.checker
1123
 
        if self.checker is not None:
1124
 
            old_checker_pid = self.checker.pid
1125
 
        else:
1126
 
            old_checker_pid = None
1127
 
        r = Client.start_checker(self, *args, **kwargs)
1128
 
        # Only if new checker process was started
1129
 
        if (self.checker is not None
1130
 
            and old_checker_pid != self.checker.pid):
1131
 
            # Emit D-Bus signal
1132
 
            self.CheckerStarted(self.current_checker_command)
1133
 
        return r
1134
 
    
1135
 
    def _reset_approved(self):
1136
 
        self._approved = None
1137
 
        return False
1138
 
    
1139
 
    def approve(self, value=True):
1140
 
        self.send_changedstate()
1141
 
        self._approved = value
1142
 
        gobject.timeout_add(_timedelta_to_milliseconds
1143
 
                            (self.approval_duration),
1144
 
                            self._reset_approved)
1145
 
    
1146
 
    
1147
 
    ## D-Bus methods, signals & properties
1148
 
    _interface = "se.recompile.Mandos.Client"
1149
 
    
1150
 
    ## Signals
1151
 
    
1152
 
    # CheckerCompleted - signal
1153
 
    @dbus.service.signal(_interface, signature="nxs")
1154
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
1155
 
        "D-Bus signal"
1156
 
        pass
1157
 
    
1158
 
    # CheckerStarted - signal
1159
 
    @dbus.service.signal(_interface, signature="s")
1160
 
    def CheckerStarted(self, command):
1161
 
        "D-Bus signal"
1162
 
        pass
1163
 
    
1164
 
    # PropertyChanged - signal
1165
 
    @dbus.service.signal(_interface, signature="sv")
1166
 
    def PropertyChanged(self, property, value):
1167
 
        "D-Bus signal"
1168
 
        pass
1169
 
    
1170
 
    # GotSecret - signal
1171
 
    @dbus.service.signal(_interface)
1172
 
    def GotSecret(self):
1173
 
        """D-Bus signal
1174
 
        Is sent after a successful transfer of secret from the Mandos
1175
 
        server to mandos-client
1176
 
        """
1177
 
        pass
1178
 
    
1179
 
    # Rejected - signal
1180
 
    @dbus.service.signal(_interface, signature="s")
1181
 
    def Rejected(self, reason):
1182
 
        "D-Bus signal"
1183
 
        pass
1184
 
    
1185
 
    # NeedApproval - signal
1186
 
    @dbus.service.signal(_interface, signature="tb")
1187
 
    def NeedApproval(self, timeout, default):
1188
 
        "D-Bus signal"
1189
 
        return self.need_approval()
1190
 
    
1191
 
    # NeRwequest - signal
1192
 
    @dbus.service.signal(_interface, signature="s")
1193
 
    def NewRequest(self, ip):
1194
 
        """D-Bus signal
1195
 
        Is sent after a client request a password.
1196
 
        """
1197
 
        pass
1198
 
    
1199
 
    ## Methods
1200
 
    
1201
 
    # Approve - method
1202
 
    @dbus.service.method(_interface, in_signature="b")
1203
 
    def Approve(self, value):
1204
 
        self.approve(value)
1205
 
    
1206
 
    # CheckedOK - method
1207
 
    @dbus.service.method(_interface)
1208
 
    def CheckedOK(self):
1209
 
        self.checked_ok()
1210
 
    
1211
 
    # Enable - method
1212
 
    @dbus.service.method(_interface)
1213
 
    def Enable(self):
1214
 
        "D-Bus method"
1215
 
        self.enable()
1216
 
    
1217
 
    # StartChecker - method
1218
 
    @dbus.service.method(_interface)
1219
 
    def StartChecker(self):
1220
 
        "D-Bus method"
1221
 
        self.start_checker()
1222
 
    
1223
 
    # Disable - method
1224
 
    @dbus.service.method(_interface)
1225
 
    def Disable(self):
1226
 
        "D-Bus method"
1227
 
        self.disable()
1228
 
    
1229
 
    # StopChecker - method
1230
 
    @dbus.service.method(_interface)
1231
 
    def StopChecker(self):
1232
 
        self.stop_checker()
1233
 
    
1234
 
    ## Properties
1235
 
    
1236
 
    # ApprovalPending - property
1237
 
    @dbus_service_property(_interface, signature="b", access="read")
1238
 
    def ApprovalPending_dbus_property(self):
1239
 
        return dbus.Boolean(bool(self.approvals_pending))
1240
 
    
1241
 
    # ApprovedByDefault - property
1242
 
    @dbus_service_property(_interface, signature="b",
1243
 
                           access="readwrite")
1244
 
    def ApprovedByDefault_dbus_property(self, value=None):
1245
 
        if value is None:       # get
1246
 
            return dbus.Boolean(self.approved_by_default)
1247
 
        self.approved_by_default = bool(value)
1248
 
    
1249
 
    # ApprovalDelay - property
1250
 
    @dbus_service_property(_interface, signature="t",
1251
 
                           access="readwrite")
1252
 
    def ApprovalDelay_dbus_property(self, value=None):
1253
 
        if value is None:       # get
1254
 
            return dbus.UInt64(self.approval_delay_milliseconds())
1255
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1256
 
    
1257
 
    # ApprovalDuration - property
1258
 
    @dbus_service_property(_interface, signature="t",
1259
 
                           access="readwrite")
1260
 
    def ApprovalDuration_dbus_property(self, value=None):
1261
 
        if value is None:       # get
1262
 
            return dbus.UInt64(_timedelta_to_milliseconds(
1263
 
                    self.approval_duration))
1264
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1265
 
    
1266
 
    # Name - property
1267
 
    @dbus_service_property(_interface, signature="s", access="read")
1268
 
    def Name_dbus_property(self):
1269
 
        return dbus.String(self.name)
1270
 
    
1271
 
    # Fingerprint - property
1272
 
    @dbus_service_property(_interface, signature="s", access="read")
1273
 
    def Fingerprint_dbus_property(self):
1274
 
        return dbus.String(self.fingerprint)
1275
 
    
1276
 
    # Host - property
1277
 
    @dbus_service_property(_interface, signature="s",
1278
 
                           access="readwrite")
1279
 
    def Host_dbus_property(self, value=None):
1280
 
        if value is None:       # get
1281
 
            return dbus.String(self.host)
1282
 
        self.host = value
1283
 
    
1284
 
    # Created - property
1285
 
    @dbus_service_property(_interface, signature="s", access="read")
1286
 
    def Created_dbus_property(self):
1287
 
        return datetime_to_dbus(self.created)
1288
 
    
1289
 
    # LastEnabled - property
1290
 
    @dbus_service_property(_interface, signature="s", access="read")
1291
 
    def LastEnabled_dbus_property(self):
1292
 
        return datetime_to_dbus(self.last_enabled)
1293
 
    
1294
 
    # Enabled - property
1295
 
    @dbus_service_property(_interface, signature="b",
1296
 
                           access="readwrite")
1297
 
    def Enabled_dbus_property(self, value=None):
1298
 
        if value is None:       # get
1299
 
            return dbus.Boolean(self.enabled)
1300
 
        if value:
1301
 
            self.enable()
1302
 
        else:
1303
 
            self.disable()
1304
 
    
1305
 
    # LastCheckedOK - property
1306
 
    @dbus_service_property(_interface, signature="s",
1307
 
                           access="readwrite")
1308
 
    def LastCheckedOK_dbus_property(self, value=None):
1309
 
        if value is not None:
1310
 
            self.checked_ok()
1311
 
            return
1312
 
        return datetime_to_dbus(self.last_checked_ok)
1313
 
    
1314
 
    # Expires - property
1315
 
    @dbus_service_property(_interface, signature="s", access="read")
1316
 
    def Expires_dbus_property(self):
1317
 
        return datetime_to_dbus(self.expires)
1318
 
    
1319
 
    # LastApprovalRequest - property
1320
 
    @dbus_service_property(_interface, signature="s", access="read")
1321
 
    def LastApprovalRequest_dbus_property(self):
1322
 
        return datetime_to_dbus(self.last_approval_request)
1323
 
    
1324
 
    # Timeout - property
1325
 
    @dbus_service_property(_interface, signature="t",
1326
 
                           access="readwrite")
1327
 
    def Timeout_dbus_property(self, value=None):
1328
 
        if value is None:       # get
1329
 
            return dbus.UInt64(self.timeout_milliseconds())
1330
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1331
 
        if getattr(self, "disable_initiator_tag", None) is None:
1332
 
            return
1333
 
        # Reschedule timeout
1334
 
        gobject.source_remove(self.disable_initiator_tag)
1335
 
        self.disable_initiator_tag = None
1336
 
        self.expires = None
1337
 
        time_to_die = _timedelta_to_milliseconds((self
1338
 
                                                  .last_checked_ok
1339
 
                                                  + self.timeout)
1340
 
                                                 - datetime.datetime
1341
 
                                                 .utcnow())
1342
 
        if time_to_die <= 0:
1343
 
            # The timeout has passed
1344
 
            self.disable()
1345
 
        else:
1346
 
            self.expires = (datetime.datetime.utcnow()
1347
 
                            + datetime.timedelta(milliseconds =
1348
 
                                                 time_to_die))
1349
 
            self.disable_initiator_tag = (gobject.timeout_add
1350
 
                                          (time_to_die, self.disable))
1351
 
    
1352
 
    # ExtendedTimeout - property
1353
 
    @dbus_service_property(_interface, signature="t",
1354
 
                           access="readwrite")
1355
 
    def ExtendedTimeout_dbus_property(self, value=None):
1356
 
        if value is None:       # get
1357
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
1358
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1359
 
    
1360
 
    # Interval - property
1361
 
    @dbus_service_property(_interface, signature="t",
1362
 
                           access="readwrite")
1363
 
    def Interval_dbus_property(self, value=None):
1364
 
        if value is None:       # get
1365
 
            return dbus.UInt64(self.interval_milliseconds())
1366
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1367
 
        if getattr(self, "checker_initiator_tag", None) is None:
1368
 
            return
1369
 
        if self.enabled:
1370
 
            # Reschedule checker run
1371
 
            gobject.source_remove(self.checker_initiator_tag)
1372
 
            self.checker_initiator_tag = (gobject.timeout_add
1373
 
                                          (value, self.start_checker))
1374
 
            self.start_checker()    # Start one now, too
1375
 
    
1376
 
    # Checker - property
1377
 
    @dbus_service_property(_interface, signature="s",
1378
 
                           access="readwrite")
1379
 
    def Checker_dbus_property(self, value=None):
1380
 
        if value is None:       # get
1381
 
            return dbus.String(self.checker_command)
1382
 
        self.checker_command = value
1383
 
    
1384
 
    # CheckerRunning - property
1385
 
    @dbus_service_property(_interface, signature="b",
1386
 
                           access="readwrite")
1387
 
    def CheckerRunning_dbus_property(self, value=None):
1388
 
        if value is None:       # get
1389
 
            return dbus.Boolean(self.checker is not None)
1390
 
        if value:
1391
 
            self.start_checker()
1392
 
        else:
1393
 
            self.stop_checker()
1394
 
    
1395
 
    # ObjectPath - property
1396
 
    @dbus_service_property(_interface, signature="o", access="read")
1397
 
    def ObjectPath_dbus_property(self):
1398
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1399
 
    
1400
 
    # Secret = property
1401
 
    @dbus_service_property(_interface, signature="ay",
1402
 
                           access="write", byte_arrays=True)
1403
 
    def Secret_dbus_property(self, value):
1404
 
        self.secret = str(value)
1405
 
    
1406
 
    del _interface
1407
 
 
1408
 
 
1409
 
class ProxyClient(object):
1410
 
    def __init__(self, child_pipe, fpr, address):
1411
 
        self._pipe = child_pipe
1412
 
        self._pipe.send(('init', fpr, address))
1413
 
        if not self._pipe.recv():
1414
 
            raise KeyError()
1415
 
    
1416
 
    def __getattribute__(self, name):
1417
 
        if(name == '_pipe'):
1418
 
            return super(ProxyClient, self).__getattribute__(name)
1419
 
        self._pipe.send(('getattr', name))
1420
 
        data = self._pipe.recv()
1421
 
        if data[0] == 'data':
1422
 
            return data[1]
1423
 
        if data[0] == 'function':
1424
 
            def func(*args, **kwargs):
1425
 
                self._pipe.send(('funcall', name, args, kwargs))
1426
 
                return self._pipe.recv()[1]
1427
 
            return func
1428
 
    
1429
 
    def __setattr__(self, name, value):
1430
 
        if(name == '_pipe'):
1431
 
            return super(ProxyClient, self).__setattr__(name, value)
1432
 
        self._pipe.send(('setattr', name, value))
1433
 
 
1434
 
 
1435
 
class ClientDBusTransitional(ClientDBus):
1436
 
    __metaclass__ = AlternateDBusNamesMetaclass
1437
 
 
1438
 
 
1439
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1440
 
    """A class to handle client connections.
1441
 
    
1442
 
    Instantiated once for each connection to handle it.
 
376
    def still_valid(self):
 
377
        """Has the timeout not yet passed for this client?"""
 
378
        now = datetime.datetime.now()
 
379
        if self.last_checked_ok is None:
 
380
            return now < (self.created + self.timeout)
 
381
        else:
 
382
            return now < (self.last_checked_ok + self.timeout)
 
383
 
 
384
 
 
385
def peer_certificate(session):
 
386
    "Return the peer's OpenPGP certificate as a bytestring"
 
387
    # If not an OpenPGP certificate...
 
388
    if gnutls.library.functions.gnutls_certificate_type_get\
 
389
            (session._c_object) \
 
390
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
391
        # ...do the normal thing
 
392
        return session.peer_certificate
 
393
    list_size = ctypes.c_uint()
 
394
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
395
        (session._c_object, ctypes.byref(list_size))
 
396
    if list_size.value == 0:
 
397
        return None
 
398
    cert = cert_list[0]
 
399
    return ctypes.string_at(cert.data, cert.size)
 
400
 
 
401
 
 
402
def fingerprint(openpgp):
 
403
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
404
    # New GnuTLS "datum" with the OpenPGP public key
 
405
    datum = gnutls.library.types.gnutls_datum_t\
 
406
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
407
                     ctypes.POINTER(ctypes.c_ubyte)),
 
408
         ctypes.c_uint(len(openpgp)))
 
409
    # New empty GnuTLS certificate
 
410
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
411
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
412
        (ctypes.byref(crt))
 
413
    # Import the OpenPGP public key into the certificate
 
414
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
415
                    (crt, ctypes.byref(datum),
 
416
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
417
    # Verify the self signature in the key
 
418
    crtverify = ctypes.c_uint();
 
419
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
420
        (crt, 0, ctypes.byref(crtverify))
 
421
    if crtverify.value != 0:
 
422
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
423
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
424
    # New buffer for the fingerprint
 
425
    buffer = ctypes.create_string_buffer(20)
 
426
    buffer_length = ctypes.c_size_t()
 
427
    # Get the fingerprint from the certificate into the buffer
 
428
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
429
        (crt, ctypes.byref(buffer), ctypes.byref(buffer_length))
 
430
    # Deinit the certificate
 
431
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
432
    # Convert the buffer to a Python bytestring
 
433
    fpr = ctypes.string_at(buffer, buffer_length.value)
 
434
    # Convert the bytestring to hexadecimal notation
 
435
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
436
    return hex_fpr
 
437
 
 
438
 
 
439
class tcp_handler(SocketServer.BaseRequestHandler, object):
 
440
    """A TCP request handler class.
 
441
    Instantiated by IPv6_TCPServer for each request to handle it.
1443
442
    Note: This will run in its own forked process."""
1444
443
    
1445
444
    def handle(self):
1446
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1447
 
            logger.info("TCP connection from: %s",
1448
 
                        unicode(self.client_address))
1449
 
            logger.debug("Pipe FD: %d",
1450
 
                         self.server.child_pipe.fileno())
1451
 
            
1452
 
            session = (gnutls.connection
1453
 
                       .ClientSession(self.request,
1454
 
                                      gnutls.connection
1455
 
                                      .X509Credentials()))
1456
 
            
1457
 
            # Note: gnutls.connection.X509Credentials is really a
1458
 
            # generic GnuTLS certificate credentials object so long as
1459
 
            # no X.509 keys are added to it.  Therefore, we can use it
1460
 
            # here despite using OpenPGP certificates.
1461
 
            
1462
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1463
 
            #                      "+AES-256-CBC", "+SHA1",
1464
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1465
 
            #                      "+DHE-DSS"))
1466
 
            # Use a fallback default, since this MUST be set.
1467
 
            priority = self.server.gnutls_priority
1468
 
            if priority is None:
1469
 
                priority = "NORMAL"
1470
 
            (gnutls.library.functions
1471
 
             .gnutls_priority_set_direct(session._c_object,
1472
 
                                         priority, None))
1473
 
            
1474
 
            # Start communication using the Mandos protocol
1475
 
            # Get protocol number
1476
 
            line = self.request.makefile().readline()
1477
 
            logger.debug("Protocol version: %r", line)
1478
 
            try:
1479
 
                if int(line.strip().split()[0]) > 1:
1480
 
                    raise RuntimeError
1481
 
            except (ValueError, IndexError, RuntimeError) as error:
1482
 
                logger.error("Unknown protocol version: %s", error)
1483
 
                return
1484
 
            
1485
 
            # Start GnuTLS connection
1486
 
            try:
1487
 
                session.handshake()
1488
 
            except gnutls.errors.GNUTLSError as error:
1489
 
                logger.warning("Handshake failed: %s", error)
1490
 
                # Do not run session.bye() here: the session is not
1491
 
                # established.  Just abandon the request.
1492
 
                return
1493
 
            logger.debug("Handshake succeeded")
1494
 
            
1495
 
            approval_required = False
1496
 
            try:
1497
 
                try:
1498
 
                    fpr = self.fingerprint(self.peer_certificate
1499
 
                                           (session))
1500
 
                except (TypeError,
1501
 
                        gnutls.errors.GNUTLSError) as error:
1502
 
                    logger.warning("Bad certificate: %s", error)
1503
 
                    return
1504
 
                logger.debug("Fingerprint: %s", fpr)
1505
 
                if self.server.use_dbus:
1506
 
                    # Emit D-Bus signal
1507
 
                    client.NewRequest(str(self.client_address))
1508
 
                
1509
 
                try:
1510
 
                    client = ProxyClient(child_pipe, fpr,
1511
 
                                         self.client_address)
1512
 
                except KeyError:
1513
 
                    return
1514
 
                
1515
 
                if client.approval_delay:
1516
 
                    delay = client.approval_delay
1517
 
                    client.approvals_pending += 1
1518
 
                    approval_required = True
1519
 
                
1520
 
                while True:
1521
 
                    if not client.enabled:
1522
 
                        logger.info("Client %s is disabled",
1523
 
                                       client.name)
1524
 
                        if self.server.use_dbus:
1525
 
                            # Emit D-Bus signal
1526
 
                            client.Rejected("Disabled")
1527
 
                        return
1528
 
                    
1529
 
                    if client._approved or not client.approval_delay:
1530
 
                        #We are approved or approval is disabled
1531
 
                        break
1532
 
                    elif client._approved is None:
1533
 
                        logger.info("Client %s needs approval",
1534
 
                                    client.name)
1535
 
                        if self.server.use_dbus:
1536
 
                            # Emit D-Bus signal
1537
 
                            client.NeedApproval(
1538
 
                                client.approval_delay_milliseconds(),
1539
 
                                client.approved_by_default)
1540
 
                    else:
1541
 
                        logger.warning("Client %s was not approved",
1542
 
                                       client.name)
1543
 
                        if self.server.use_dbus:
1544
 
                            # Emit D-Bus signal
1545
 
                            client.Rejected("Denied")
1546
 
                        return
1547
 
                    
1548
 
                    #wait until timeout or approved
1549
 
                    time = datetime.datetime.now()
1550
 
                    client.changedstate.acquire()
1551
 
                    (client.changedstate.wait
1552
 
                     (float(client._timedelta_to_milliseconds(delay)
1553
 
                            / 1000)))
1554
 
                    client.changedstate.release()
1555
 
                    time2 = datetime.datetime.now()
1556
 
                    if (time2 - time) >= delay:
1557
 
                        if not client.approved_by_default:
1558
 
                            logger.warning("Client %s timed out while"
1559
 
                                           " waiting for approval",
1560
 
                                           client.name)
1561
 
                            if self.server.use_dbus:
1562
 
                                # Emit D-Bus signal
1563
 
                                client.Rejected("Approval timed out")
1564
 
                            return
1565
 
                        else:
1566
 
                            break
1567
 
                    else:
1568
 
                        delay -= time2 - time
1569
 
                
1570
 
                sent_size = 0
1571
 
                while sent_size < len(client.secret):
1572
 
                    try:
1573
 
                        sent = session.send(client.secret[sent_size:])
1574
 
                    except gnutls.errors.GNUTLSError as error:
1575
 
                        logger.warning("gnutls send failed")
1576
 
                        return
1577
 
                    logger.debug("Sent: %d, remaining: %d",
1578
 
                                 sent, len(client.secret)
1579
 
                                 - (sent_size + sent))
1580
 
                    sent_size += sent
1581
 
                
1582
 
                logger.info("Sending secret to %s", client.name)
1583
 
                # bump the timeout using extended_timeout
1584
 
                client.checked_ok(client.extended_timeout)
1585
 
                if self.server.use_dbus:
1586
 
                    # Emit D-Bus signal
1587
 
                    client.GotSecret()
1588
 
            
1589
 
            finally:
1590
 
                if approval_required:
1591
 
                    client.approvals_pending -= 1
1592
 
                try:
1593
 
                    session.bye()
1594
 
                except gnutls.errors.GNUTLSError as error:
1595
 
                    logger.warning("GnuTLS bye failed")
1596
 
    
1597
 
    @staticmethod
1598
 
    def peer_certificate(session):
1599
 
        "Return the peer's OpenPGP certificate as a bytestring"
1600
 
        # If not an OpenPGP certificate...
1601
 
        if (gnutls.library.functions
1602
 
            .gnutls_certificate_type_get(session._c_object)
1603
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1604
 
            # ...do the normal thing
1605
 
            return session.peer_certificate
1606
 
        list_size = ctypes.c_uint(1)
1607
 
        cert_list = (gnutls.library.functions
1608
 
                     .gnutls_certificate_get_peers
1609
 
                     (session._c_object, ctypes.byref(list_size)))
1610
 
        if not bool(cert_list) and list_size.value != 0:
1611
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1612
 
                                            " certificate")
1613
 
        if list_size.value == 0:
1614
 
            return None
1615
 
        cert = cert_list[0]
1616
 
        return ctypes.string_at(cert.data, cert.size)
1617
 
    
1618
 
    @staticmethod
1619
 
    def fingerprint(openpgp):
1620
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1621
 
        # New GnuTLS "datum" with the OpenPGP public key
1622
 
        datum = (gnutls.library.types
1623
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1624
 
                                             ctypes.POINTER
1625
 
                                             (ctypes.c_ubyte)),
1626
 
                                 ctypes.c_uint(len(openpgp))))
1627
 
        # New empty GnuTLS certificate
1628
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1629
 
        (gnutls.library.functions
1630
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1631
 
        # Import the OpenPGP public key into the certificate
1632
 
        (gnutls.library.functions
1633
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1634
 
                                    gnutls.library.constants
1635
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1636
 
        # Verify the self signature in the key
1637
 
        crtverify = ctypes.c_uint()
1638
 
        (gnutls.library.functions
1639
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1640
 
                                         ctypes.byref(crtverify)))
1641
 
        if crtverify.value != 0:
1642
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1643
 
            raise (gnutls.errors.CertificateSecurityError
1644
 
                   ("Verify failed"))
1645
 
        # New buffer for the fingerprint
1646
 
        buf = ctypes.create_string_buffer(20)
1647
 
        buf_len = ctypes.c_size_t()
1648
 
        # Get the fingerprint from the certificate into the buffer
1649
 
        (gnutls.library.functions
1650
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1651
 
                                             ctypes.byref(buf_len)))
1652
 
        # Deinit the certificate
1653
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1654
 
        # Convert the buffer to a Python bytestring
1655
 
        fpr = ctypes.string_at(buf, buf_len.value)
1656
 
        # Convert the bytestring to hexadecimal notation
1657
 
        hex_fpr = binascii.hexlify(fpr).upper()
1658
 
        return hex_fpr
1659
 
 
1660
 
 
1661
 
class MultiprocessingMixIn(object):
1662
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1663
 
    def sub_process_main(self, request, address):
1664
 
        try:
1665
 
            self.finish_request(request, address)
1666
 
        except:
1667
 
            self.handle_error(request, address)
1668
 
        self.close_request(request)
1669
 
    
1670
 
    def process_request(self, request, address):
1671
 
        """Start a new process to process the request."""
1672
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1673
 
                                       args = (request,
1674
 
                                               address))
1675
 
        proc.start()
1676
 
        return proc
1677
 
 
1678
 
 
1679
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1680
 
    """ adds a pipe to the MixIn """
1681
 
    def process_request(self, request, client_address):
1682
 
        """Overrides and wraps the original process_request().
1683
 
        
1684
 
        This function creates a new pipe in self.pipe
1685
 
        """
1686
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1687
 
        
1688
 
        proc = MultiprocessingMixIn.process_request(self, request,
1689
 
                                                    client_address)
1690
 
        self.child_pipe.close()
1691
 
        self.add_pipe(parent_pipe, proc)
1692
 
    
1693
 
    def add_pipe(self, parent_pipe, proc):
1694
 
        """Dummy function; override as necessary"""
1695
 
        raise NotImplementedError
1696
 
 
1697
 
 
1698
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1699
 
                     socketserver.TCPServer, object):
1700
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1701
 
    
 
445
        logger.info(u"TCP connection from: %s",
 
446
                     unicode(self.client_address))
 
447
        session = gnutls.connection.ClientSession\
 
448
                  (self.request, gnutls.connection.X509Credentials())
 
449
        
 
450
        line = self.request.makefile().readline()
 
451
        logger.debug(u"Protocol version: %r", line)
 
452
        try:
 
453
            if int(line.strip().split()[0]) > 1:
 
454
                raise RuntimeError
 
455
        except (ValueError, IndexError, RuntimeError), error:
 
456
            logger.error(u"Unknown protocol version: %s", error)
 
457
            return
 
458
        
 
459
        # Note: gnutls.connection.X509Credentials is really a generic
 
460
        # GnuTLS certificate credentials object so long as no X.509
 
461
        # keys are added to it.  Therefore, we can use it here despite
 
462
        # using OpenPGP certificates.
 
463
        
 
464
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
465
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
466
        #                "+DHE-DSS"))
 
467
        priority = "NORMAL"             # Fallback default, since this
 
468
                                        # MUST be set.
 
469
        if self.server.settings["priority"]:
 
470
            priority = self.server.settings["priority"]
 
471
        gnutls.library.functions.gnutls_priority_set_direct\
 
472
            (session._c_object, priority, None);
 
473
        
 
474
        try:
 
475
            session.handshake()
 
476
        except gnutls.errors.GNUTLSError, error:
 
477
            logger.warning(u"Handshake failed: %s", error)
 
478
            # Do not run session.bye() here: the session is not
 
479
            # established.  Just abandon the request.
 
480
            return
 
481
        try:
 
482
            fpr = fingerprint(peer_certificate(session))
 
483
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
484
            logger.warning(u"Bad certificate: %s", error)
 
485
            session.bye()
 
486
            return
 
487
        logger.debug(u"Fingerprint: %s", fpr)
 
488
        client = None
 
489
        for c in self.server.clients:
 
490
            if c.fingerprint == fpr:
 
491
                client = c
 
492
                break
 
493
        if not client:
 
494
            logger.warning(u"Client not found for fingerprint: %s",
 
495
                           fpr)
 
496
            session.bye()
 
497
            return
 
498
        # Have to check if client.still_valid(), since it is possible
 
499
        # that the client timed out while establishing the GnuTLS
 
500
        # session.
 
501
        if not client.still_valid():
 
502
            logger.warning(u"Client %(name)s is invalid",
 
503
                           vars(client))
 
504
            session.bye()
 
505
            return
 
506
        sent_size = 0
 
507
        while sent_size < len(client.secret):
 
508
            sent = session.send(client.secret[sent_size:])
 
509
            logger.debug(u"Sent: %d, remaining: %d",
 
510
                         sent, len(client.secret)
 
511
                         - (sent_size + sent))
 
512
            sent_size += sent
 
513
        session.bye()
 
514
 
 
515
 
 
516
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
517
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1702
518
    Attributes:
 
519
        settings:       Server settings
 
520
        clients:        Set() of Client objects
1703
521
        enabled:        Boolean; whether this server is activated yet
1704
 
        interface:      None or a network interface name (string)
1705
 
        use_ipv6:       Boolean; to use IPv6 or not
1706
522
    """
1707
 
    def __init__(self, server_address, RequestHandlerClass,
1708
 
                 interface=None, use_ipv6=True):
1709
 
        self.interface = interface
1710
 
        if use_ipv6:
1711
 
            self.address_family = socket.AF_INET6
1712
 
        socketserver.TCPServer.__init__(self, server_address,
1713
 
                                        RequestHandlerClass)
 
523
    address_family = socket.AF_INET6
 
524
    def __init__(self, *args, **kwargs):
 
525
        if "settings" in kwargs:
 
526
            self.settings = kwargs["settings"]
 
527
            del kwargs["settings"]
 
528
        if "clients" in kwargs:
 
529
            self.clients = kwargs["clients"]
 
530
            del kwargs["clients"]
 
531
        self.enabled = False
 
532
        return super(type(self), self).__init__(*args, **kwargs)
1714
533
    def server_bind(self):
1715
534
        """This overrides the normal server_bind() function
1716
535
        to bind to an interface if one was specified, and also NOT to
1717
536
        bind to an address or port if they were not specified."""
1718
 
        if self.interface is not None:
1719
 
            if SO_BINDTODEVICE is None:
1720
 
                logger.error("SO_BINDTODEVICE does not exist;"
1721
 
                             " cannot bind to interface %s",
1722
 
                             self.interface)
1723
 
            else:
1724
 
                try:
1725
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1726
 
                                           SO_BINDTODEVICE,
1727
 
                                           str(self.interface
1728
 
                                               + '\0'))
1729
 
                except socket.error as error:
1730
 
                    if error[0] == errno.EPERM:
1731
 
                        logger.error("No permission to"
1732
 
                                     " bind to interface %s",
1733
 
                                     self.interface)
1734
 
                    elif error[0] == errno.ENOPROTOOPT:
1735
 
                        logger.error("SO_BINDTODEVICE not available;"
1736
 
                                     " cannot bind to interface %s",
1737
 
                                     self.interface)
1738
 
                    else:
1739
 
                        raise
 
537
        if self.settings["interface"]:
 
538
            # 25 is from /usr/include/asm-i486/socket.h
 
539
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
540
            try:
 
541
                self.socket.setsockopt(socket.SOL_SOCKET,
 
542
                                       SO_BINDTODEVICE,
 
543
                                       self.settings["interface"])
 
544
            except socket.error, error:
 
545
                if error[0] == errno.EPERM:
 
546
                    logger.error(u"No permission to"
 
547
                                 u" bind to interface %s",
 
548
                                 self.settings["interface"])
 
549
                else:
 
550
                    raise error
1740
551
        # Only bind(2) the socket if we really need to.
1741
552
        if self.server_address[0] or self.server_address[1]:
1742
553
            if not self.server_address[0]:
1743
 
                if self.address_family == socket.AF_INET6:
1744
 
                    any_address = "::" # in6addr_any
1745
 
                else:
1746
 
                    any_address = socket.INADDR_ANY
1747
 
                self.server_address = (any_address,
 
554
                in6addr_any = "::"
 
555
                self.server_address = (in6addr_any,
1748
556
                                       self.server_address[1])
1749
557
            elif not self.server_address[1]:
1750
558
                self.server_address = (self.server_address[0],
1751
559
                                       0)
1752
 
#                 if self.interface:
 
560
#                 if self.settings["interface"]:
1753
561
#                     self.server_address = (self.server_address[0],
1754
562
#                                            0, # port
1755
563
#                                            0, # flowinfo
1756
564
#                                            if_nametoindex
1757
 
#                                            (self.interface))
1758
 
            return socketserver.TCPServer.server_bind(self)
1759
 
 
1760
 
 
1761
 
class MandosServer(IPv6_TCPServer):
1762
 
    """Mandos server.
1763
 
    
1764
 
    Attributes:
1765
 
        clients:        set of Client objects
1766
 
        gnutls_priority GnuTLS priority string
1767
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1768
 
    
1769
 
    Assumes a gobject.MainLoop event loop.
1770
 
    """
1771
 
    def __init__(self, server_address, RequestHandlerClass,
1772
 
                 interface=None, use_ipv6=True, clients=None,
1773
 
                 gnutls_priority=None, use_dbus=True):
1774
 
        self.enabled = False
1775
 
        self.clients = clients
1776
 
        if self.clients is None:
1777
 
            self.clients = {}
1778
 
        self.use_dbus = use_dbus
1779
 
        self.gnutls_priority = gnutls_priority
1780
 
        IPv6_TCPServer.__init__(self, server_address,
1781
 
                                RequestHandlerClass,
1782
 
                                interface = interface,
1783
 
                                use_ipv6 = use_ipv6)
 
565
#                                            (self.settings
 
566
#                                             ["interface"]))
 
567
            return super(type(self), self).server_bind()
1784
568
    def server_activate(self):
1785
569
        if self.enabled:
1786
 
            return socketserver.TCPServer.server_activate(self)
1787
 
    
 
570
            return super(type(self), self).server_activate()
1788
571
    def enable(self):
1789
572
        self.enabled = True
1790
 
    
1791
 
    def add_pipe(self, parent_pipe, proc):
1792
 
        # Call "handle_ipc" for both data and EOF events
1793
 
        gobject.io_add_watch(parent_pipe.fileno(),
1794
 
                             gobject.IO_IN | gobject.IO_HUP,
1795
 
                             functools.partial(self.handle_ipc,
1796
 
                                               parent_pipe =
1797
 
                                               parent_pipe,
1798
 
                                               proc = proc))
1799
 
    
1800
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1801
 
                   proc = None, client_object=None):
1802
 
        condition_names = {
1803
 
            gobject.IO_IN: "IN",   # There is data to read.
1804
 
            gobject.IO_OUT: "OUT", # Data can be written (without
1805
 
                                    # blocking).
1806
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
1807
 
            gobject.IO_ERR: "ERR", # Error condition.
1808
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
1809
 
                                    # broken, usually for pipes and
1810
 
                                    # sockets).
1811
 
            }
1812
 
        conditions_string = ' | '.join(name
1813
 
                                       for cond, name in
1814
 
                                       condition_names.iteritems()
1815
 
                                       if cond & condition)
1816
 
        # error, or the other end of multiprocessing.Pipe has closed
1817
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1818
 
            # Wait for other process to exit
1819
 
            proc.join()
1820
 
            return False
1821
 
        
1822
 
        # Read a request from the child
1823
 
        request = parent_pipe.recv()
1824
 
        command = request[0]
1825
 
        
1826
 
        if command == 'init':
1827
 
            fpr = request[1]
1828
 
            address = request[2]
1829
 
            
1830
 
            for c in self.clients.itervalues():
1831
 
                if c.fingerprint == fpr:
1832
 
                    client = c
1833
 
                    break
1834
 
            else:
1835
 
                logger.info("Client not found for fingerprint: %s, ad"
1836
 
                            "dress: %s", fpr, address)
1837
 
                if self.use_dbus:
1838
 
                    # Emit D-Bus signal
1839
 
                    mandos_dbus_service.ClientNotFound(fpr,
1840
 
                                                       address[0])
1841
 
                parent_pipe.send(False)
1842
 
                return False
1843
 
            
1844
 
            gobject.io_add_watch(parent_pipe.fileno(),
1845
 
                                 gobject.IO_IN | gobject.IO_HUP,
1846
 
                                 functools.partial(self.handle_ipc,
1847
 
                                                   parent_pipe =
1848
 
                                                   parent_pipe,
1849
 
                                                   proc = proc,
1850
 
                                                   client_object =
1851
 
                                                   client))
1852
 
            parent_pipe.send(True)
1853
 
            # remove the old hook in favor of the new above hook on
1854
 
            # same fileno
1855
 
            return False
1856
 
        if command == 'funcall':
1857
 
            funcname = request[1]
1858
 
            args = request[2]
1859
 
            kwargs = request[3]
1860
 
            
1861
 
            parent_pipe.send(('data', getattr(client_object,
1862
 
                                              funcname)(*args,
1863
 
                                                         **kwargs)))
1864
 
        
1865
 
        if command == 'getattr':
1866
 
            attrname = request[1]
1867
 
            if callable(client_object.__getattribute__(attrname)):
1868
 
                parent_pipe.send(('function',))
1869
 
            else:
1870
 
                parent_pipe.send(('data', client_object
1871
 
                                  .__getattribute__(attrname)))
1872
 
        
1873
 
        if command == 'setattr':
1874
 
            attrname = request[1]
1875
 
            value = request[2]
1876
 
            setattr(client_object, attrname, value)
1877
 
        
1878
 
        return True
1879
573
 
1880
574
 
1881
575
def string_to_delta(interval):
1882
576
    """Parse a string and return a datetime.timedelta
1883
 
    
 
577
 
1884
578
    >>> string_to_delta('7d')
1885
579
    datetime.timedelta(7)
1886
580
    >>> string_to_delta('60s')
1889
583
    datetime.timedelta(0, 3600)
1890
584
    >>> string_to_delta('24h')
1891
585
    datetime.timedelta(1)
1892
 
    >>> string_to_delta('1w')
 
586
    >>> string_to_delta(u'1w')
1893
587
    datetime.timedelta(7)
1894
588
    >>> string_to_delta('5m 30s')
1895
589
    datetime.timedelta(0, 330)
1897
591
    timevalue = datetime.timedelta(0)
1898
592
    for s in interval.split():
1899
593
        try:
1900
 
            suffix = unicode(s[-1])
1901
 
            value = int(s[:-1])
1902
 
            if suffix == "d":
 
594
            suffix=unicode(s[-1])
 
595
            value=int(s[:-1])
 
596
            if suffix == u"d":
1903
597
                delta = datetime.timedelta(value)
1904
 
            elif suffix == "s":
 
598
            elif suffix == u"s":
1905
599
                delta = datetime.timedelta(0, value)
1906
 
            elif suffix == "m":
 
600
            elif suffix == u"m":
1907
601
                delta = datetime.timedelta(0, 0, 0, 0, value)
1908
 
            elif suffix == "h":
 
602
            elif suffix == u"h":
1909
603
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1910
 
            elif suffix == "w":
 
604
            elif suffix == u"w":
1911
605
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1912
606
            else:
1913
 
                raise ValueError("Unknown suffix %r" % suffix)
1914
 
        except (ValueError, IndexError) as e:
1915
 
            raise ValueError(*(e.args))
 
607
                raise ValueError
 
608
        except (ValueError, IndexError):
 
609
            raise ValueError
1916
610
        timevalue += delta
1917
611
    return timevalue
1918
612
 
1919
613
 
 
614
def server_state_changed(state):
 
615
    """Derived from the Avahi example code"""
 
616
    if state == avahi.SERVER_COLLISION:
 
617
        logger.error(u"Zeroconf server name collision")
 
618
        service.remove()
 
619
    elif state == avahi.SERVER_RUNNING:
 
620
        service.add()
 
621
 
 
622
 
 
623
def entry_group_state_changed(state, error):
 
624
    """Derived from the Avahi example code"""
 
625
    logger.debug(u"Avahi state change: %i", state)
 
626
    
 
627
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
628
        logger.debug(u"Zeroconf service established.")
 
629
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
630
        logger.warning(u"Zeroconf service name collision.")
 
631
        service.rename()
 
632
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
633
        logger.critical(u"Avahi: Error in group state changed %s",
 
634
                        unicode(error))
 
635
        raise AvahiGroupError("State changed: %s", str(error))
 
636
 
 
637
def if_nametoindex(interface):
 
638
    """Call the C function if_nametoindex(), or equivalent"""
 
639
    global if_nametoindex
 
640
    try:
 
641
        if "ctypes.util" not in sys.modules:
 
642
            import ctypes.util
 
643
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
644
            (ctypes.util.find_library("c")).if_nametoindex
 
645
    except (OSError, AttributeError):
 
646
        if "struct" not in sys.modules:
 
647
            import struct
 
648
        if "fcntl" not in sys.modules:
 
649
            import fcntl
 
650
        def if_nametoindex(interface):
 
651
            "Get an interface index the hard way, i.e. using fcntl()"
 
652
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
653
            s = socket.socket()
 
654
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
655
                                struct.pack("16s16x", interface))
 
656
            s.close()
 
657
            interface_index = struct.unpack("I", ifreq[16:20])[0]
 
658
            return interface_index
 
659
    return if_nametoindex(interface)
 
660
 
 
661
 
1920
662
def daemon(nochdir = False, noclose = False):
1921
663
    """See daemon(3).  Standard BSD Unix function.
1922
 
    
1923
664
    This should really exist as os.daemon, but it doesn't (yet)."""
1924
665
    if os.fork():
1925
666
        sys.exit()
1933
674
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1934
675
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1935
676
            raise OSError(errno.ENODEV,
1936
 
                          "%s not a character device"
1937
 
                          % os.path.devnull)
 
677
                          "/dev/null not a character device")
1938
678
        os.dup2(null, sys.stdin.fileno())
1939
679
        os.dup2(null, sys.stdout.fileno())
1940
680
        os.dup2(null, sys.stderr.fileno())
1943
683
 
1944
684
 
1945
685
def main():
1946
 
    
1947
 
    ##################################################################
1948
 
    # Parsing of options, both command line and config file
1949
 
    
1950
 
    parser = argparse.ArgumentParser()
1951
 
    parser.add_argument("-v", "--version", action="version",
1952
 
                        version = "%%(prog)s %s" % version,
1953
 
                        help="show version number and exit")
1954
 
    parser.add_argument("-i", "--interface", metavar="IF",
1955
 
                        help="Bind to interface IF")
1956
 
    parser.add_argument("-a", "--address",
1957
 
                        help="Address to listen for requests on")
1958
 
    parser.add_argument("-p", "--port", type=int,
1959
 
                        help="Port number to receive requests on")
1960
 
    parser.add_argument("--check", action="store_true",
1961
 
                        help="Run self-test")
1962
 
    parser.add_argument("--debug", action="store_true",
1963
 
                        help="Debug mode; run in foreground and log"
1964
 
                        " to terminal")
1965
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
1966
 
                        help="Debug level for stdout output")
1967
 
    parser.add_argument("--priority", help="GnuTLS"
1968
 
                        " priority string (see GnuTLS documentation)")
1969
 
    parser.add_argument("--servicename",
1970
 
                        metavar="NAME", help="Zeroconf service name")
1971
 
    parser.add_argument("--configdir",
1972
 
                        default="/etc/mandos", metavar="DIR",
1973
 
                        help="Directory to search for configuration"
1974
 
                        " files")
1975
 
    parser.add_argument("--no-dbus", action="store_false",
1976
 
                        dest="use_dbus", help="Do not provide D-Bus"
1977
 
                        " system bus interface")
1978
 
    parser.add_argument("--no-ipv6", action="store_false",
1979
 
                        dest="use_ipv6", help="Do not use IPv6")
1980
 
    parser.add_argument("--no-restore", action="store_false",
1981
 
                        dest="restore", help="Do not restore stored"
1982
 
                        " state")
1983
 
    parser.add_argument("--statedir", metavar="DIR",
1984
 
                        help="Directory to save/restore state in")
1985
 
    
1986
 
    options = parser.parse_args()
 
686
    global main_loop_started
 
687
    main_loop_started = False
 
688
    
 
689
    parser = OptionParser(version = "%%prog %s" % version)
 
690
    parser.add_option("-i", "--interface", type="string",
 
691
                      metavar="IF", help="Bind to interface IF")
 
692
    parser.add_option("-a", "--address", type="string",
 
693
                      help="Address to listen for requests on")
 
694
    parser.add_option("-p", "--port", type="int",
 
695
                      help="Port number to receive requests on")
 
696
    parser.add_option("--check", action="store_true", default=False,
 
697
                      help="Run self-test")
 
698
    parser.add_option("--debug", action="store_true",
 
699
                      help="Debug mode; run in foreground and log to"
 
700
                      " terminal")
 
701
    parser.add_option("--priority", type="string", help="GnuTLS"
 
702
                      " priority string (see GnuTLS documentation)")
 
703
    parser.add_option("--servicename", type="string", metavar="NAME",
 
704
                      help="Zeroconf service name")
 
705
    parser.add_option("--configdir", type="string",
 
706
                      default="/etc/mandos", metavar="DIR",
 
707
                      help="Directory to search for configuration"
 
708
                      " files")
 
709
    (options, args) = parser.parse_args()
1987
710
    
1988
711
    if options.check:
1989
712
        import doctest
1998
721
                        "priority":
1999
722
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
2000
723
                        "servicename": "Mandos",
2001
 
                        "use_dbus": "True",
2002
 
                        "use_ipv6": "True",
2003
 
                        "debuglevel": "",
2004
 
                        "restore": "True",
2005
 
                        "statedir": "/var/lib/mandos"
2006
724
                        }
2007
725
    
2008
726
    # Parse config file for server-global settings
2009
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
727
    server_config = ConfigParser.SafeConfigParser(server_defaults)
2010
728
    del server_defaults
2011
 
    server_config.read(os.path.join(options.configdir,
2012
 
                                    "mandos.conf"))
 
729
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2013
730
    # Convert the SafeConfigParser object to a dict
2014
731
    server_settings = server_config.defaults()
2015
 
    # Use the appropriate methods on the non-string config options
2016
 
    for option in ("debug", "use_dbus", "use_ipv6"):
2017
 
        server_settings[option] = server_config.getboolean("DEFAULT",
2018
 
                                                           option)
2019
 
    if server_settings["port"]:
2020
 
        server_settings["port"] = server_config.getint("DEFAULT",
2021
 
                                                       "port")
 
732
    # Use getboolean on the boolean config option
 
733
    server_settings["debug"] = server_config.getboolean\
 
734
                               ("DEFAULT", "debug")
2022
735
    del server_config
2023
736
    
2024
737
    # Override the settings from the config file with command line
2025
738
    # options, if set.
2026
739
    for option in ("interface", "address", "port", "debug",
2027
 
                   "priority", "servicename", "configdir",
2028
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore",
2029
 
                   "statedir"):
 
740
                   "priority", "servicename", "configdir"):
2030
741
        value = getattr(options, option)
2031
742
        if value is not None:
2032
743
            server_settings[option] = value
2033
744
    del options
2034
 
    # Force all strings to be unicode
2035
 
    for option in server_settings.keys():
2036
 
        if type(server_settings[option]) is str:
2037
 
            server_settings[option] = unicode(server_settings[option])
2038
745
    # Now we have our good server settings in "server_settings"
2039
746
    
2040
 
    ##################################################################
2041
 
    
2042
 
    # For convenience
2043
747
    debug = server_settings["debug"]
2044
 
    debuglevel = server_settings["debuglevel"]
2045
 
    use_dbus = server_settings["use_dbus"]
2046
 
    use_ipv6 = server_settings["use_ipv6"]
2047
 
    stored_state_path = os.path.join(server_settings["statedir"],
2048
 
                                     stored_state_file)
2049
748
    
2050
 
    if debug:
2051
 
        initlogger(logging.DEBUG)
2052
 
    else:
2053
 
        if not debuglevel:
2054
 
            initlogger()
2055
 
        else:
2056
 
            level = getattr(logging, debuglevel.upper())
2057
 
            initlogger(level)
 
749
    if not debug:
 
750
        syslogger.setLevel(logging.WARNING)
 
751
        console.setLevel(logging.WARNING)
2058
752
    
2059
753
    if server_settings["servicename"] != "Mandos":
2060
 
        syslogger.setFormatter(logging.Formatter
2061
 
                               ('Mandos (%s) [%%(process)d]:'
2062
 
                                ' %%(levelname)s: %%(message)s'
 
754
        syslogger.setFormatter(logging.Formatter\
 
755
                               ('Mandos (%s): %%(levelname)s:'
 
756
                                ' %%(message)s'
2063
757
                                % server_settings["servicename"]))
2064
758
    
2065
759
    # Parse config file with clients
2066
 
    client_defaults = { "timeout": "5m",
2067
 
                        "extended_timeout": "15m",
2068
 
                        "interval": "2m",
2069
 
                        "checker": "fping -q -- %%(host)s",
 
760
    client_defaults = { "timeout": "1h",
 
761
                        "interval": "5m",
 
762
                        "checker": "fping -q -- %(host)s",
2070
763
                        "host": "",
2071
 
                        "approval_delay": "0s",
2072
 
                        "approval_duration": "1s",
2073
764
                        }
2074
 
    client_config = configparser.SafeConfigParser(client_defaults)
 
765
    client_config = ConfigParser.SafeConfigParser(client_defaults)
2075
766
    client_config.read(os.path.join(server_settings["configdir"],
2076
767
                                    "clients.conf"))
2077
768
    
2078
 
    global mandos_dbus_service
2079
 
    mandos_dbus_service = None
2080
 
    
2081
 
    tcp_server = MandosServer((server_settings["address"],
2082
 
                               server_settings["port"]),
2083
 
                              ClientHandler,
2084
 
                              interface=(server_settings["interface"]
2085
 
                                         or None),
2086
 
                              use_ipv6=use_ipv6,
2087
 
                              gnutls_priority=
2088
 
                              server_settings["priority"],
2089
 
                              use_dbus=use_dbus)
2090
 
    if not debug:
2091
 
        pidfilename = "/var/run/mandos.pid"
2092
 
        try:
2093
 
            pidfile = open(pidfilename, "w")
2094
 
        except IOError:
2095
 
            logger.error("Could not open file %r", pidfilename)
2096
 
    
2097
 
    try:
2098
 
        uid = pwd.getpwnam("_mandos").pw_uid
2099
 
        gid = pwd.getpwnam("_mandos").pw_gid
2100
 
    except KeyError:
2101
 
        try:
2102
 
            uid = pwd.getpwnam("mandos").pw_uid
2103
 
            gid = pwd.getpwnam("mandos").pw_gid
2104
 
        except KeyError:
2105
 
            try:
2106
 
                uid = pwd.getpwnam("nobody").pw_uid
2107
 
                gid = pwd.getpwnam("nobody").pw_gid
2108
 
            except KeyError:
2109
 
                uid = 65534
2110
 
                gid = 65534
2111
 
    try:
 
769
    clients = Set()
 
770
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
771
                                 server_settings["port"]),
 
772
                                tcp_handler,
 
773
                                settings=server_settings,
 
774
                                clients=clients)
 
775
    pidfilename = "/var/run/mandos.pid"
 
776
    try:
 
777
        pidfile = open(pidfilename, "w")
 
778
    except IOError, error:
 
779
        logger.error("Could not open file %r", pidfilename)
 
780
    
 
781
    uid = 65534
 
782
    gid = 65534
 
783
    try:
 
784
        uid = pwd.getpwnam("mandos").pw_uid
 
785
    except KeyError:
 
786
        try:
 
787
            uid = pwd.getpwnam("nobody").pw_uid
 
788
        except KeyError:
 
789
            pass
 
790
    try:
 
791
        gid = pwd.getpwnam("mandos").pw_gid
 
792
    except KeyError:
 
793
        try:
 
794
            gid = pwd.getpwnam("nogroup").pw_gid
 
795
        except KeyError:
 
796
            pass
 
797
    try:
 
798
        os.setuid(uid)
2112
799
        os.setgid(gid)
2113
 
        os.setuid(uid)
2114
 
    except OSError as error:
 
800
    except OSError, error:
2115
801
        if error[0] != errno.EPERM:
2116
802
            raise error
2117
803
    
2118
 
    if debug:
2119
 
        # Enable all possible GnuTLS debugging
2120
 
        
2121
 
        # "Use a log level over 10 to enable all debugging options."
2122
 
        # - GnuTLS manual
2123
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2124
 
        
2125
 
        @gnutls.library.types.gnutls_log_func
2126
 
        def debug_gnutls(level, string):
2127
 
            logger.debug("GnuTLS: %s", string[:-1])
2128
 
        
2129
 
        (gnutls.library.functions
2130
 
         .gnutls_global_set_log_function(debug_gnutls))
2131
 
        
2132
 
        # Redirect stdin so all checkers get /dev/null
2133
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2134
 
        os.dup2(null, sys.stdin.fileno())
2135
 
        if null > 2:
2136
 
            os.close(null)
2137
 
    else:
2138
 
        # No console logging
2139
 
        logger.removeHandler(console)
2140
 
    
2141
 
    # Need to fork before connecting to D-Bus
2142
 
    if not debug:
2143
 
        # Close all input and output, do double fork, etc.
2144
 
        daemon()
 
804
    global service
 
805
    service = AvahiService(name = server_settings["servicename"],
 
806
                           type = "_mandos._tcp", );
 
807
    if server_settings["interface"]:
 
808
        service.interface = if_nametoindex\
 
809
                            (server_settings["interface"])
2145
810
    
2146
811
    global main_loop
 
812
    global bus
 
813
    global server
2147
814
    # From the Avahi example code
2148
815
    DBusGMainLoop(set_as_default=True )
2149
816
    main_loop = gobject.MainLoop()
2150
817
    bus = dbus.SystemBus()
 
818
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
819
                                           avahi.DBUS_PATH_SERVER),
 
820
                            avahi.DBUS_INTERFACE_SERVER)
2151
821
    # End of Avahi example code
2152
 
    if use_dbus:
2153
 
        try:
2154
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2155
 
                                            bus, do_not_queue=True)
2156
 
            old_bus_name = (dbus.service.BusName
2157
 
                            ("se.bsnet.fukt.Mandos", bus,
2158
 
                             do_not_queue=True))
2159
 
        except dbus.exceptions.NameExistsException as e:
2160
 
            logger.error(unicode(e) + ", disabling D-Bus")
2161
 
            use_dbus = False
2162
 
            server_settings["use_dbus"] = False
2163
 
            tcp_server.use_dbus = False
2164
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2165
 
    service = AvahiServiceToSyslog(name =
2166
 
                                   server_settings["servicename"],
2167
 
                                   servicetype = "_mandos._tcp",
2168
 
                                   protocol = protocol, bus = bus)
2169
 
    if server_settings["interface"]:
2170
 
        service.interface = (if_nametoindex
2171
 
                             (str(server_settings["interface"])))
2172
 
    
2173
 
    global multiprocessing_manager
2174
 
    multiprocessing_manager = multiprocessing.Manager()
2175
 
    
2176
 
    client_class = Client
2177
 
    if use_dbus:
2178
 
        client_class = functools.partial(ClientDBusTransitional,
2179
 
                                         bus = bus)
2180
 
    
2181
 
    special_settings = {
2182
 
        # Some settings need to be accessd by special methods;
2183
 
        # booleans need .getboolean(), etc.  Here is a list of them:
2184
 
        "approved_by_default":
2185
 
            lambda section:
2186
 
            client_config.getboolean(section, "approved_by_default"),
2187
 
        "enabled":
2188
 
            lambda section:
2189
 
            client_config.getboolean(section, "enabled"),
2190
 
        }
2191
 
    # Construct a new dict of client settings of this form:
2192
 
    # { client_name: {setting_name: value, ...}, ...}
2193
 
    # with exceptions for any special settings as defined above
2194
 
    client_settings = dict((clientname,
2195
 
                           dict((setting,
2196
 
                                 (value
2197
 
                                  if setting not in special_settings
2198
 
                                  else special_settings[setting]
2199
 
                                  (clientname)))
2200
 
                                for setting, value in
2201
 
                                client_config.items(clientname)))
2202
 
                          for clientname in client_config.sections())
2203
 
    
2204
 
    old_client_settings = {}
2205
 
    clients_data = []
2206
 
    
2207
 
    # Get client data and settings from last running state.
2208
 
    if server_settings["restore"]:
2209
 
        try:
2210
 
            with open(stored_state_path, "rb") as stored_state:
2211
 
                clients_data, old_client_settings = (pickle.load
2212
 
                                                     (stored_state))
2213
 
            os.remove(stored_state_path)
2214
 
        except IOError as e:
2215
 
            logger.warning("Could not load persistent state: {0}"
2216
 
                           .format(e))
2217
 
            if e.errno != errno.ENOENT:
2218
 
                raise
2219
 
    
2220
 
    with Crypto() as crypt:
2221
 
        for client in clients_data:
2222
 
            client_name = client["name"]
2223
 
            
2224
 
            # Decide which value to use after restoring saved state.
2225
 
            # We have three different values: Old config file,
2226
 
            # new config file, and saved state.
2227
 
            # New config value takes precedence if it differs from old
2228
 
            # config value, otherwise use saved state.
2229
 
            for name, value in client_settings[client_name].items():
2230
 
                try:
2231
 
                    # For each value in new config, check if it
2232
 
                    # differs from the old config value (Except for
2233
 
                    # the "secret" attribute)
2234
 
                    if (name != "secret" and
2235
 
                        value != old_client_settings[client_name]
2236
 
                        [name]):
2237
 
                        setattr(client, name, value)
2238
 
                except KeyError:
2239
 
                    pass
2240
 
            
2241
 
            # Clients who has passed its expire date can still be
2242
 
            # enabled if its last checker was sucessful.  Clients
2243
 
            # whose checker failed before we stored its state is
2244
 
            # assumed to have failed all checkers during downtime.
2245
 
            if client["enabled"] and client["last_checked_ok"]:
2246
 
                if ((datetime.datetime.utcnow()
2247
 
                     - client["last_checked_ok"])
2248
 
                    > client["interval"]):
2249
 
                    if client["last_checker_status"] != 0:
2250
 
                        client["enabled"] = False
2251
 
                    else:
2252
 
                        client["expires"] = (datetime.datetime
2253
 
                                             .utcnow()
2254
 
                                             + client["timeout"])
2255
 
            
2256
 
            client["changedstate"] = (multiprocessing_manager
2257
 
                                      .Condition
2258
 
                                      (multiprocessing_manager
2259
 
                                       .Lock()))
2260
 
            if use_dbus:
2261
 
                new_client = (ClientDBusTransitional.__new__
2262
 
                              (ClientDBusTransitional))
2263
 
                tcp_server.clients[client_name] = new_client
2264
 
                new_client.bus = bus
2265
 
                for name, value in client.iteritems():
2266
 
                    setattr(new_client, name, value)
2267
 
                client_object_name = unicode(client_name).translate(
2268
 
                    {ord("."): ord("_"),
2269
 
                     ord("-"): ord("_")})
2270
 
                new_client.dbus_object_path = (dbus.ObjectPath
2271
 
                                               ("/clients/"
2272
 
                                                + client_object_name))
2273
 
                DBusObjectWithProperties.__init__(new_client,
2274
 
                                                  new_client.bus,
2275
 
                                                  new_client
2276
 
                                                  .dbus_object_path)
2277
 
            else:
2278
 
                tcp_server.clients[client_name] = (Client.__new__
2279
 
                                                   (Client))
2280
 
                for name, value in client.iteritems():
2281
 
                    setattr(tcp_server.clients[client_name],
2282
 
                            name, value)
2283
 
            
2284
 
            try:
2285
 
                tcp_server.clients[client_name].secret = (
2286
 
                    crypt.decrypt(tcp_server.clients[client_name]
2287
 
                                  .encrypted_secret,
2288
 
                                  client_settings[client_name]
2289
 
                                  ["secret"]))
2290
 
            except CryptoError:
2291
 
                # If decryption fails, we use secret from new settings
2292
 
                tcp_server.clients[client_name].secret = (
2293
 
                    client_settings[client_name]["secret"])
2294
 
    
2295
 
    # Create/remove clients based on new changes made to config
2296
 
    for clientname in set(old_client_settings) - set(client_settings):
2297
 
        del tcp_server.clients[clientname]
2298
 
    for clientname in set(client_settings) - set(old_client_settings):
2299
 
        tcp_server.clients[clientname] = (client_class(name
2300
 
                                                       = clientname,
2301
 
                                                       config =
2302
 
                                                       client_settings
2303
 
                                                       [clientname]))
2304
 
    
2305
 
    if not tcp_server.clients:
2306
 
        logger.warning("No clients defined")
 
822
    
 
823
    def remove_from_clients(client):
 
824
        clients.remove(client)
 
825
        if not clients:
 
826
            logger.critical(u"No clients left, exiting")
 
827
            sys.exit()
 
828
    
 
829
    clients.update(Set(Client(name = section,
 
830
                              stop_hook = remove_from_clients,
 
831
                              config
 
832
                              = dict(client_config.items(section)))
 
833
                       for section in client_config.sections()))
 
834
    if not clients:
 
835
        logger.critical(u"No clients defined")
 
836
        sys.exit(1)
 
837
    
 
838
    if debug:
 
839
        # Redirect stdin so all checkers get /dev/null
 
840
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
841
        os.dup2(null, sys.stdin.fileno())
 
842
        if null > 2:
 
843
            os.close(null)
 
844
    else:
 
845
        # No console logging
 
846
        logger.removeHandler(console)
 
847
        # Close all input and output, do double fork, etc.
 
848
        daemon()
 
849
    
 
850
    try:
 
851
        pid = os.getpid()
 
852
        pidfile.write(str(pid) + "\n")
 
853
        pidfile.close()
 
854
        del pidfile
 
855
    except IOError, err:
 
856
        logger.error(u"Could not write to file %r with PID %d",
 
857
                     pidfilename, pid)
 
858
    except NameError:
 
859
        # "pidfile" was never created
 
860
        pass
 
861
    del pidfilename
 
862
    
 
863
    def cleanup():
 
864
        "Cleanup function; run on exit"
 
865
        global group
 
866
        # From the Avahi example code
 
867
        if not group is None:
 
868
            group.Free()
 
869
            group = None
 
870
        # End of Avahi example code
2307
871
        
 
872
        while clients:
 
873
            client = clients.pop()
 
874
            client.stop_hook = None
 
875
            client.stop()
 
876
    
 
877
    atexit.register(cleanup)
 
878
    
2308
879
    if not debug:
2309
 
        try:
2310
 
            with pidfile:
2311
 
                pid = os.getpid()
2312
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
2313
 
            del pidfile
2314
 
        except IOError:
2315
 
            logger.error("Could not write to file %r with PID %d",
2316
 
                         pidfilename, pid)
2317
 
        except NameError:
2318
 
            # "pidfile" was never created
2319
 
            pass
2320
 
        del pidfilename
2321
 
        
2322
880
        signal.signal(signal.SIGINT, signal.SIG_IGN)
2323
 
    
2324
881
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2325
882
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2326
883
    
2327
 
    if use_dbus:
2328
 
        class MandosDBusService(dbus.service.Object):
2329
 
            """A D-Bus proxy object"""
2330
 
            def __init__(self):
2331
 
                dbus.service.Object.__init__(self, bus, "/")
2332
 
            _interface = "se.recompile.Mandos"
2333
 
            
2334
 
            @dbus.service.signal(_interface, signature="o")
2335
 
            def ClientAdded(self, objpath):
2336
 
                "D-Bus signal"
2337
 
                pass
2338
 
            
2339
 
            @dbus.service.signal(_interface, signature="ss")
2340
 
            def ClientNotFound(self, fingerprint, address):
2341
 
                "D-Bus signal"
2342
 
                pass
2343
 
            
2344
 
            @dbus.service.signal(_interface, signature="os")
2345
 
            def ClientRemoved(self, objpath, name):
2346
 
                "D-Bus signal"
2347
 
                pass
2348
 
            
2349
 
            @dbus.service.method(_interface, out_signature="ao")
2350
 
            def GetAllClients(self):
2351
 
                "D-Bus method"
2352
 
                return dbus.Array(c.dbus_object_path
2353
 
                                  for c in
2354
 
                                  tcp_server.clients.itervalues())
2355
 
            
2356
 
            @dbus.service.method(_interface,
2357
 
                                 out_signature="a{oa{sv}}")
2358
 
            def GetAllClientsWithProperties(self):
2359
 
                "D-Bus method"
2360
 
                return dbus.Dictionary(
2361
 
                    ((c.dbus_object_path, c.GetAll(""))
2362
 
                     for c in tcp_server.clients.itervalues()),
2363
 
                    signature="oa{sv}")
2364
 
            
2365
 
            @dbus.service.method(_interface, in_signature="o")
2366
 
            def RemoveClient(self, object_path):
2367
 
                "D-Bus method"
2368
 
                for c in tcp_server.clients.itervalues():
2369
 
                    if c.dbus_object_path == object_path:
2370
 
                        del tcp_server.clients[c.name]
2371
 
                        c.remove_from_connection()
2372
 
                        # Don't signal anything except ClientRemoved
2373
 
                        c.disable(quiet=True)
2374
 
                        # Emit D-Bus signal
2375
 
                        self.ClientRemoved(object_path, c.name)
2376
 
                        return
2377
 
                raise KeyError(object_path)
2378
 
            
2379
 
            del _interface
2380
 
        
2381
 
        class MandosDBusServiceTransitional(MandosDBusService):
2382
 
            __metaclass__ = AlternateDBusNamesMetaclass
2383
 
        mandos_dbus_service = MandosDBusServiceTransitional()
2384
 
    
2385
 
    def cleanup():
2386
 
        "Cleanup function; run on exit"
2387
 
        service.cleanup()
2388
 
        
2389
 
        multiprocessing.active_children()
2390
 
        if not (tcp_server.clients or client_settings):
2391
 
            return
2392
 
        
2393
 
        # Store client before exiting. Secrets are encrypted with key
2394
 
        # based on what config file has. If config file is
2395
 
        # removed/edited, old secret will thus be unrecovable.
2396
 
        clients = []
2397
 
        with Crypto() as crypt:
2398
 
            for client in tcp_server.clients.itervalues():
2399
 
                key = client_settings[client.name]["secret"]
2400
 
                client.encrypted_secret = crypt.encrypt(client.secret,
2401
 
                                                        key)
2402
 
                client_dict = {}
2403
 
                
2404
 
                # A list of attributes that will not be stored when
2405
 
                # shutting down.
2406
 
                exclude = set(("bus", "changedstate", "secret"))
2407
 
                for name, typ in (inspect.getmembers
2408
 
                                  (dbus.service.Object)):
2409
 
                    exclude.add(name)
2410
 
                
2411
 
                client_dict["encrypted_secret"] = (client
2412
 
                                                   .encrypted_secret)
2413
 
                for attr in client.client_structure:
2414
 
                    if attr not in exclude:
2415
 
                        client_dict[attr] = getattr(client, attr)
2416
 
                
2417
 
                clients.append(client_dict)
2418
 
                del client_settings[client.name]["secret"]
2419
 
        
2420
 
        try:
2421
 
            with os.fdopen(os.open(stored_state_path,
2422
 
                                   os.O_CREAT|os.O_WRONLY|os.O_TRUNC,
2423
 
                                   0600), "wb") as stored_state:
2424
 
                pickle.dump((clients, client_settings), stored_state)
2425
 
        except (IOError, OSError) as e:
2426
 
            logger.warning("Could not save persistent state: {0}"
2427
 
                           .format(e))
2428
 
            if e.errno not in (errno.ENOENT, errno.EACCES):
2429
 
                raise
2430
 
        
2431
 
        # Delete all clients, and settings from config
2432
 
        while tcp_server.clients:
2433
 
            name, client = tcp_server.clients.popitem()
2434
 
            if use_dbus:
2435
 
                client.remove_from_connection()
2436
 
            # Don't signal anything except ClientRemoved
2437
 
            client.disable(quiet=True)
2438
 
            if use_dbus:
2439
 
                # Emit D-Bus signal
2440
 
                mandos_dbus_service.ClientRemoved(client
2441
 
                                                  .dbus_object_path,
2442
 
                                                  client.name)
2443
 
        client_settings.clear()
2444
 
    
2445
 
    atexit.register(cleanup)
2446
 
    
2447
 
    for client in tcp_server.clients.itervalues():
2448
 
        if use_dbus:
2449
 
            # Emit D-Bus signal
2450
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2451
 
        # Need to initiate checking of clients
2452
 
        if client.enabled:
2453
 
            client.init_checker()
 
884
    for client in clients:
 
885
        client.start()
2454
886
    
2455
887
    tcp_server.enable()
2456
888
    tcp_server.server_activate()
2457
889
    
2458
890
    # Find out what port we got
2459
891
    service.port = tcp_server.socket.getsockname()[1]
2460
 
    if use_ipv6:
2461
 
        logger.info("Now listening on address %r, port %d,"
2462
 
                    " flowinfo %d, scope_id %d"
2463
 
                    % tcp_server.socket.getsockname())
2464
 
    else:                       # IPv4
2465
 
        logger.info("Now listening on address %r, port %d"
2466
 
                    % tcp_server.socket.getsockname())
 
892
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
893
                u" scope_id %d" % tcp_server.socket.getsockname())
2467
894
    
2468
895
    #service.interface = tcp_server.socket.getsockname()[3]
2469
896
    
2470
897
    try:
2471
898
        # From the Avahi example code
 
899
        server.connect_to_signal("StateChanged", server_state_changed)
2472
900
        try:
2473
 
            service.activate()
2474
 
        except dbus.exceptions.DBusException as error:
2475
 
            logger.critical("DBusException: %s", error)
2476
 
            cleanup()
 
901
            server_state_changed(server.GetState())
 
902
        except dbus.exceptions.DBusException, error:
 
903
            logger.critical(u"DBusException: %s", error)
2477
904
            sys.exit(1)
2478
905
        # End of Avahi example code
2479
906
        
2480
907
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2481
908
                             lambda *args, **kwargs:
2482
 
                             (tcp_server.handle_request
2483
 
                              (*args[2:], **kwargs) or True))
 
909
                             tcp_server.handle_request\
 
910
                             (*args[2:], **kwargs) or True)
2484
911
        
2485
 
        logger.debug("Starting main loop")
 
912
        logger.debug(u"Starting main loop")
 
913
        main_loop_started = True
2486
914
        main_loop.run()
2487
 
    except AvahiError as error:
2488
 
        logger.critical("AvahiError: %s", error)
2489
 
        cleanup()
 
915
    except AvahiError, error:
 
916
        logger.critical(u"AvahiError: %s" + unicode(error))
2490
917
        sys.exit(1)
2491
918
    except KeyboardInterrupt:
2492
919
        if debug:
2493
 
            print("", file=sys.stderr)
2494
 
        logger.debug("Server received KeyboardInterrupt")
2495
 
    logger.debug("Server exiting")
2496
 
    # Must run before the D-Bus bus name gets deregistered
2497
 
    cleanup()
2498
 
 
 
920
            print
2499
921
 
2500
922
if __name__ == '__main__':
2501
923
    main()