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* debian/mandos-client.postinst: Converted to Bourne shell.  Also
                                 minor message change.
* debian/mandos-client.postrm: Minor message change.
* debian/mandos.postinst: Converted to Bourne shell.  Also minor
                          message change.
* debian/mandos.prerm: Minor message change.

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Lines of Context:
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# 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 © 2008,2009 Teddy Hogeborn
 
15
# Copyright © 2008,2009 Björn Påhlsson
16
16
17
17
# This program is free software: you can redistribute it and/or modify
18
18
# it under the terms of the GNU General Public License as published by
28
28
# along with this program.  If not, see
29
29
# <http://www.gnu.org/licenses/>.
30
30
31
 
# Contact the authors at <mandos@recompile.se>.
 
31
# Contact the authors at <mandos@fukt.bsnet.se>.
32
32
33
33
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
 
34
from __future__ import division, with_statement, absolute_import
36
35
 
37
 
import SocketServer as socketserver
 
36
import SocketServer
38
37
import socket
39
 
import argparse
 
38
import optparse
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 hashlib
 
59
from contextlib import closing
67
60
 
68
61
import dbus
69
62
import dbus.service
72
65
from dbus.mainloop.glib import DBusGMainLoop
73
66
import ctypes
74
67
import ctypes.util
75
 
import xml.dom.minidom
76
 
import inspect
77
 
import Crypto.Cipher.AES
78
 
 
79
 
try:
80
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
 
except AttributeError:
82
 
    try:
83
 
        from IN import SO_BINDTODEVICE
84
 
    except ImportError:
85
 
        SO_BINDTODEVICE = None
86
 
 
87
 
 
88
 
version = "1.4.1"
89
 
 
90
 
stored_state_path = "/var/lib/mandos/clients.pickle"
91
 
 
92
 
#logger = logging.getLogger('mandos')
 
68
 
 
69
version = "1.0.5"
 
70
 
93
71
logger = logging.Logger('mandos')
94
72
syslogger = (logging.handlers.SysLogHandler
95
73
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
96
 
              address = str("/dev/log")))
 
74
              address = "/dev/log"))
97
75
syslogger.setFormatter(logging.Formatter
98
 
                       ('Mandos [%(process)d]: %(levelname)s:'
99
 
                        ' %(message)s'))
 
76
                       ('Mandos: %(levelname)s: %(message)s'))
100
77
logger.addHandler(syslogger)
101
78
 
102
79
console = logging.StreamHandler()
103
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
104
 
                                       ' %(levelname)s:'
 
80
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
105
81
                                       ' %(message)s'))
106
82
logger.addHandler(console)
107
83
 
121
97
 
122
98
class AvahiService(object):
123
99
    """An Avahi (Zeroconf) service.
124
 
    
125
100
    Attributes:
126
101
    interface: integer; avahi.IF_UNSPEC or an interface index.
127
102
               Used to optionally bind to the specified interface.
135
110
    max_renames: integer; maximum number of renames
136
111
    rename_count: integer; counter so we only rename after collisions
137
112
                  a sensible number of times
138
 
    group: D-Bus Entry Group
139
 
    server: D-Bus Server
140
 
    bus: dbus.SystemBus()
141
113
    """
142
114
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
143
115
                 servicetype = None, port = None, TXT = None,
144
 
                 domain = "", host = "", max_renames = 32768,
145
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
116
                 domain = "", host = "", max_renames = 32768):
146
117
        self.interface = interface
147
118
        self.name = name
148
119
        self.type = servicetype
152
123
        self.host = host
153
124
        self.rename_count = 0
154
125
        self.max_renames = max_renames
155
 
        self.protocol = protocol
156
 
        self.group = None       # our entry group
157
 
        self.server = None
158
 
        self.bus = bus
159
 
        self.entry_group_state_changed_match = None
160
126
    def rename(self):
161
127
        """Derived from the Avahi example code"""
162
128
        if self.rename_count >= self.max_renames:
163
 
            logger.critical("No suitable Zeroconf service name found"
164
 
                            " after %i retries, exiting.",
 
129
            logger.critical(u"No suitable Zeroconf service name found"
 
130
                            u" after %i retries, exiting.",
165
131
                            self.rename_count)
166
 
            raise AvahiServiceError("Too many renames")
167
 
        self.name = unicode(self.server
168
 
                            .GetAlternativeServiceName(self.name))
169
 
        logger.info("Changing Zeroconf service name to %r ...",
170
 
                    self.name)
 
132
            raise AvahiServiceError(u"Too many renames")
 
133
        self.name = server.GetAlternativeServiceName(self.name)
 
134
        logger.info(u"Changing Zeroconf service name to %r ...",
 
135
                    str(self.name))
171
136
        syslogger.setFormatter(logging.Formatter
172
 
                               ('Mandos (%s) [%%(process)d]:'
173
 
                                ' %%(levelname)s: %%(message)s'
174
 
                                % self.name))
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                                ' %%(message)s' % self.name))
175
139
        self.remove()
176
 
        try:
177
 
            self.add()
178
 
        except dbus.exceptions.DBusException as error:
179
 
            logger.critical("DBusException: %s", error)
180
 
            self.cleanup()
181
 
            os._exit(1)
 
140
        self.add()
182
141
        self.rename_count += 1
183
142
    def remove(self):
184
143
        """Derived from the Avahi example code"""
185
 
        if self.entry_group_state_changed_match is not None:
186
 
            self.entry_group_state_changed_match.remove()
187
 
            self.entry_group_state_changed_match = None
188
 
        if self.group is not None:
189
 
            self.group.Reset()
 
144
        if group is not None:
 
145
            group.Reset()
190
146
    def add(self):
191
147
        """Derived from the Avahi example code"""
192
 
        self.remove()
193
 
        if self.group is None:
194
 
            self.group = dbus.Interface(
195
 
                self.bus.get_object(avahi.DBUS_NAME,
196
 
                                    self.server.EntryGroupNew()),
197
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
198
 
        self.entry_group_state_changed_match = (
199
 
            self.group.connect_to_signal(
200
 
                'StateChanged', self .entry_group_state_changed))
201
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
202
 
                     self.name, self.type)
203
 
        self.group.AddService(
204
 
            self.interface,
205
 
            self.protocol,
206
 
            dbus.UInt32(0),     # flags
207
 
            self.name, self.type,
208
 
            self.domain, self.host,
209
 
            dbus.UInt16(self.port),
210
 
            avahi.string_array_to_txt_array(self.TXT))
211
 
        self.group.Commit()
212
 
    def entry_group_state_changed(self, state, error):
213
 
        """Derived from the Avahi example code"""
214
 
        logger.debug("Avahi entry group state change: %i", state)
215
 
        
216
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
217
 
            logger.debug("Zeroconf service established.")
218
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
219
 
            logger.info("Zeroconf service name collision.")
220
 
            self.rename()
221
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
222
 
            logger.critical("Avahi: Error in group state changed %s",
223
 
                            unicode(error))
224
 
            raise AvahiGroupError("State changed: %s"
225
 
                                  % unicode(error))
226
 
    def cleanup(self):
227
 
        """Derived from the Avahi example code"""
228
 
        if self.group is not None:
229
 
            try:
230
 
                self.group.Free()
231
 
            except (dbus.exceptions.UnknownMethodException,
232
 
                    dbus.exceptions.DBusException) as e:
233
 
                pass
234
 
            self.group = None
235
 
        self.remove()
236
 
    def server_state_changed(self, state, error=None):
237
 
        """Derived from the Avahi example code"""
238
 
        logger.debug("Avahi server state change: %i", state)
239
 
        bad_states = { avahi.SERVER_INVALID:
240
 
                           "Zeroconf server invalid",
241
 
                       avahi.SERVER_REGISTERING: None,
242
 
                       avahi.SERVER_COLLISION:
243
 
                           "Zeroconf server name collision",
244
 
                       avahi.SERVER_FAILURE:
245
 
                           "Zeroconf server failure" }
246
 
        if state in bad_states:
247
 
            if bad_states[state] is not None:
248
 
                if error is None:
249
 
                    logger.error(bad_states[state])
250
 
                else:
251
 
                    logger.error(bad_states[state] + ": %r", error)
252
 
            self.cleanup()
253
 
        elif state == avahi.SERVER_RUNNING:
254
 
            self.add()
255
 
        else:
256
 
            if error is None:
257
 
                logger.debug("Unknown state: %r", state)
258
 
            else:
259
 
                logger.debug("Unknown state: %r: %r", state, error)
260
 
    def activate(self):
261
 
        """Derived from the Avahi example code"""
262
 
        if self.server is None:
263
 
            self.server = dbus.Interface(
264
 
                self.bus.get_object(avahi.DBUS_NAME,
265
 
                                    avahi.DBUS_PATH_SERVER,
266
 
                                    follow_name_owner_changes=True),
267
 
                avahi.DBUS_INTERFACE_SERVER)
268
 
        self.server.connect_to_signal("StateChanged",
269
 
                                 self.server_state_changed)
270
 
        self.server_state_changed(self.server.GetState())
271
 
 
272
 
 
273
 
def _timedelta_to_milliseconds(td):
274
 
    "Convert a datetime.timedelta() to milliseconds"
275
 
    return ((td.days * 24 * 60 * 60 * 1000)
276
 
            + (td.seconds * 1000)
277
 
            + (td.microseconds // 1000))
278
 
        
279
 
class Client(object):
 
148
        global group
 
149
        if group is None:
 
150
            group = dbus.Interface(bus.get_object
 
151
                                   (avahi.DBUS_NAME,
 
152
                                    server.EntryGroupNew()),
 
153
                                   avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
            group.connect_to_signal('StateChanged',
 
155
                                    entry_group_state_changed)
 
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
157
                     service.name, service.type)
 
158
        group.AddService(
 
159
                self.interface,         # interface
 
160
                avahi.PROTO_INET6,      # protocol
 
161
                dbus.UInt32(0),         # flags
 
162
                self.name, self.type,
 
163
                self.domain, self.host,
 
164
                dbus.UInt16(self.port),
 
165
                avahi.string_array_to_txt_array(self.TXT))
 
166
        group.Commit()
 
167
 
 
168
# From the Avahi example code:
 
169
group = None                            # our entry group
 
170
# End of Avahi example code
 
171
 
 
172
 
 
173
def _datetime_to_dbus(dt, variant_level=0):
 
174
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
175
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
176
 
 
177
 
 
178
class Client(dbus.service.Object):
280
179
    """A representation of a client host served by this server.
281
 
    
282
180
    Attributes:
283
 
    _approved:   bool(); 'None' if not yet approved/disapproved
284
 
    approval_delay: datetime.timedelta(); Time to wait for approval
285
 
    approval_duration: datetime.timedelta(); Duration of one approval
 
181
    name:       string; from the config file, used in log messages
 
182
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
183
                 uniquely identify the client
 
184
    secret:     bytestring; sent verbatim (over TLS) to client
 
185
    host:       string; available for use by the checker command
 
186
    created:    datetime.datetime(); (UTC) object creation
 
187
    last_enabled: datetime.datetime(); (UTC)
 
188
    enabled:    bool()
 
189
    last_checked_ok: datetime.datetime(); (UTC) or None
 
190
    timeout:    datetime.timedelta(); How long from last_checked_ok
 
191
                                      until this client is invalid
 
192
    interval:   datetime.timedelta(); How often to start a new checker
 
193
    disable_hook:  If set, called by disable() as disable_hook(self)
286
194
    checker:    subprocess.Popen(); a running checker process used
287
195
                                    to see if the client lives.
288
196
                                    'None' if no process is running.
289
 
    checker_callback_tag: a gobject event source tag, or None
290
 
    checker_command: string; External command which is run to check
291
 
                     if client lives.  %() expansions are done at
 
197
    checker_initiator_tag: a gobject event source tag, or None
 
198
    disable_initiator_tag:    - '' -
 
199
    checker_callback_tag:  - '' -
 
200
    checker_command: string; External command which is run to check if
 
201
                     client lives.  %() expansions are done at
292
202
                     runtime with vars(self) as dict, so that for
293
203
                     instance %(name)s can be used in the command.
294
 
    checker_initiator_tag: a gobject event source tag, or None
295
 
    created:    datetime.datetime(); (UTC) object creation
296
 
    client_structure: Object describing what attributes a client has
297
 
                      and is used for storing the client at exit
298
 
    current_checker_command: string; current running checker_command
299
 
    disable_initiator_tag: a gobject event source tag, or None
300
 
    enabled:    bool()
301
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
302
 
                 uniquely identify the client
303
 
    host:       string; available for use by the checker command
304
 
    interval:   datetime.timedelta(); How often to start a new checker
305
 
    last_approval_request: datetime.datetime(); (UTC) or None
306
 
    last_checked_ok: datetime.datetime(); (UTC) or None
307
 
    Last_checker_status: integer between 0 and 255 reflecting exit status
308
 
                         of last checker. -1 reflect crashed checker.
309
 
    last_enabled: datetime.datetime(); (UTC)
310
 
    name:       string; from the config file, used in log messages and
311
 
                        D-Bus identifiers
312
 
    secret:     bytestring; sent verbatim (over TLS) to client
313
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
314
 
                                      until this client is disabled
315
 
    extended_timeout:   extra long timeout when password has been sent
316
 
    runtime_expansions: Allowed attributes for runtime expansion.
317
 
    expires:    datetime.datetime(); time (UTC) when a client will be
318
 
                disabled, or None
 
204
    use_dbus: bool(); Whether to provide D-Bus interface and signals
 
205
    dbus_object_path: dbus.ObjectPath ; only set if self.use_dbus
319
206
    """
320
 
    
321
 
    runtime_expansions = ("approval_delay", "approval_duration",
322
 
                          "created", "enabled", "fingerprint",
323
 
                          "host", "interval", "last_checked_ok",
324
 
                          "last_enabled", "name", "timeout")
325
 
    
326
207
    def timeout_milliseconds(self):
327
208
        "Return the 'timeout' attribute in milliseconds"
328
 
        return _timedelta_to_milliseconds(self.timeout)
329
 
    
330
 
    def extended_timeout_milliseconds(self):
331
 
        "Return the 'extended_timeout' attribute in milliseconds"
332
 
        return _timedelta_to_milliseconds(self.extended_timeout)
 
209
        return ((self.timeout.days * 24 * 60 * 60 * 1000)
 
210
                + (self.timeout.seconds * 1000)
 
211
                + (self.timeout.microseconds // 1000))
333
212
    
334
213
    def interval_milliseconds(self):
335
214
        "Return the 'interval' attribute in milliseconds"
336
 
        return _timedelta_to_milliseconds(self.interval)
337
 
    
338
 
    def approval_delay_milliseconds(self):
339
 
        return _timedelta_to_milliseconds(self.approval_delay)
340
 
    
341
 
    def __init__(self, name = None, config=None):
 
215
        return ((self.interval.days * 24 * 60 * 60 * 1000)
 
216
                + (self.interval.seconds * 1000)
 
217
                + (self.interval.microseconds // 1000))
 
218
    
 
219
    def __init__(self, name = None, disable_hook=None, config=None,
 
220
                 use_dbus=True):
342
221
        """Note: the 'checker' key in 'config' sets the
343
222
        'checker_command' attribute and *not* the 'checker'
344
223
        attribute."""
345
224
        self.name = name
346
225
        if config is None:
347
226
            config = {}
348
 
        logger.debug("Creating client %r", self.name)
 
227
        logger.debug(u"Creating client %r", self.name)
 
228
        self.use_dbus = use_dbus
 
229
        if self.use_dbus:
 
230
            self.dbus_object_path = (dbus.ObjectPath
 
231
                                     ("/Mandos/clients/"
 
232
                                      + self.name.replace(".", "_")))
 
233
            dbus.service.Object.__init__(self, bus,
 
234
                                         self.dbus_object_path)
349
235
        # Uppercase and remove spaces from fingerprint for later
350
236
        # comparison purposes with return value from the fingerprint()
351
237
        # function
352
238
        self.fingerprint = (config["fingerprint"].upper()
353
 
                            .replace(" ", ""))
354
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
 
239
                            .replace(u" ", u""))
 
240
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
355
241
        if "secret" in config:
356
 
            self.secret = config["secret"].decode("base64")
 
242
            self.secret = config["secret"].decode(u"base64")
357
243
        elif "secfile" in config:
358
 
            with open(os.path.expanduser(os.path.expandvars
359
 
                                         (config["secfile"])),
360
 
                      "rb") as secfile:
 
244
            with closing(open(os.path.expanduser
 
245
                              (os.path.expandvars
 
246
                               (config["secfile"])))) as secfile:
361
247
                self.secret = secfile.read()
362
248
        else:
363
 
            raise TypeError("No secret or secfile for client %s"
 
249
            raise TypeError(u"No secret or secfile for client %s"
364
250
                            % self.name)
365
251
        self.host = config.get("host", "")
366
252
        self.created = datetime.datetime.utcnow()
367
 
        self.enabled = True
368
 
        self.last_approval_request = None
369
 
        self.last_enabled = datetime.datetime.utcnow()
 
253
        self.enabled = False
 
254
        self.last_enabled = None
370
255
        self.last_checked_ok = None
371
 
        self.last_checker_status = 0
372
256
        self.timeout = string_to_delta(config["timeout"])
373
 
        self.extended_timeout = string_to_delta(config
374
 
                                                ["extended_timeout"])
375
257
        self.interval = string_to_delta(config["interval"])
 
258
        self.disable_hook = disable_hook
376
259
        self.checker = None
377
260
        self.checker_initiator_tag = None
378
261
        self.disable_initiator_tag = None
379
 
        self.expires = datetime.datetime.utcnow() + self.timeout
380
262
        self.checker_callback_tag = None
381
263
        self.checker_command = config["checker"]
382
 
        self.current_checker_command = None
383
 
        self._approved = None
384
 
        self.approved_by_default = config.get("approved_by_default",
385
 
                                              True)
386
 
        self.approvals_pending = 0
387
 
        self.approval_delay = string_to_delta(
388
 
            config["approval_delay"])
389
 
        self.approval_duration = string_to_delta(
390
 
            config["approval_duration"])
391
 
        self.changedstate = (multiprocessing_manager
392
 
                             .Condition(multiprocessing_manager
393
 
                                        .Lock()))
394
 
        self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
395
 
        self.client_structure.append("client_structure")
396
 
 
397
 
 
398
 
        for name, t in inspect.getmembers(type(self),
399
 
                                          lambda obj: isinstance(obj, property)):
400
 
            if not name.startswith("_"):
401
 
                self.client_structure.append(name)
402
 
    
403
 
    
404
 
    def send_changedstate(self):
405
 
        self.changedstate.acquire()
406
 
        self.changedstate.notify_all()
407
 
        self.changedstate.release()
408
264
    
409
265
    def enable(self):
410
266
        """Start this client's checker and timeout hooks"""
411
 
        if getattr(self, "enabled", False):
412
 
            # Already enabled
413
 
            return
414
 
        self.send_changedstate()
415
 
        self.expires = datetime.datetime.utcnow() + self.timeout
 
267
        self.last_enabled = datetime.datetime.utcnow()
 
268
        # Schedule a new checker to be started an 'interval' from now,
 
269
        # and every interval from then on.
 
270
        self.checker_initiator_tag = (gobject.timeout_add
 
271
                                      (self.interval_milliseconds(),
 
272
                                       self.start_checker))
 
273
        # Also start a new checker *right now*.
 
274
        self.start_checker()
 
275
        # Schedule a disable() when 'timeout' has passed
 
276
        self.disable_initiator_tag = (gobject.timeout_add
 
277
                                   (self.timeout_milliseconds(),
 
278
                                    self.disable))
416
279
        self.enabled = True
417
 
        self.last_enabled = datetime.datetime.utcnow()
418
 
        self.init_checker()
 
280
        if self.use_dbus:
 
281
            # Emit D-Bus signals
 
282
            self.PropertyChanged(dbus.String(u"enabled"),
 
283
                                 dbus.Boolean(True, variant_level=1))
 
284
            self.PropertyChanged(dbus.String(u"last_enabled"),
 
285
                                 (_datetime_to_dbus(self.last_enabled,
 
286
                                                    variant_level=1)))
419
287
    
420
 
    def disable(self, quiet=True):
 
288
    def disable(self):
421
289
        """Disable this client."""
422
290
        if not getattr(self, "enabled", False):
423
291
            return False
424
 
        if not quiet:
425
 
            self.send_changedstate()
426
 
        if not quiet:
427
 
            logger.info("Disabling client %s", self.name)
 
292
        logger.info(u"Disabling client %s", self.name)
428
293
        if getattr(self, "disable_initiator_tag", False):
429
294
            gobject.source_remove(self.disable_initiator_tag)
430
295
            self.disable_initiator_tag = None
431
 
        self.expires = None
432
296
        if getattr(self, "checker_initiator_tag", False):
433
297
            gobject.source_remove(self.checker_initiator_tag)
434
298
            self.checker_initiator_tag = None
435
299
        self.stop_checker()
 
300
        if self.disable_hook:
 
301
            self.disable_hook(self)
436
302
        self.enabled = False
 
303
        if self.use_dbus:
 
304
            # Emit D-Bus signal
 
305
            self.PropertyChanged(dbus.String(u"enabled"),
 
306
                                 dbus.Boolean(False, variant_level=1))
437
307
        # Do not run this again if called by a gobject.timeout_add
438
308
        return False
439
309
    
440
310
    def __del__(self):
 
311
        self.disable_hook = None
441
312
        self.disable()
442
 
 
443
 
    def init_checker(self):
444
 
        # Schedule a new checker to be started an 'interval' from now,
445
 
        # and every interval from then on.
446
 
        self.checker_initiator_tag = (gobject.timeout_add
447
 
                                      (self.interval_milliseconds(),
448
 
                                       self.start_checker))
449
 
        # Schedule a disable() when 'timeout' has passed
450
 
        self.disable_initiator_tag = (gobject.timeout_add
451
 
                                   (self.timeout_milliseconds(),
452
 
                                    self.disable))
453
 
        # Also start a new checker *right now*.
454
 
        self.start_checker()
455
 
 
456
 
        
 
313
    
457
314
    def checker_callback(self, pid, condition, command):
458
315
        """The checker has completed, so take appropriate actions."""
459
316
        self.checker_callback_tag = None
460
317
        self.checker = None
461
 
        if os.WIFEXITED(condition):
462
 
            self.last_checker_status =  os.WEXITSTATUS(condition)
463
 
            if self.last_checker_status == 0:
464
 
                logger.info("Checker for %(name)s succeeded",
465
 
                            vars(self))
466
 
                self.checked_ok()
467
 
            else:
468
 
                logger.info("Checker for %(name)s failed",
469
 
                            vars(self))
470
 
        else:
471
 
            self.last_checker_status = -1
472
 
            logger.warning("Checker for %(name)s crashed?",
 
318
        if self.use_dbus:
 
319
            # Emit D-Bus signal
 
320
            self.PropertyChanged(dbus.String(u"checker_running"),
 
321
                                 dbus.Boolean(False, variant_level=1))
 
322
        if (os.WIFEXITED(condition)
 
323
            and (os.WEXITSTATUS(condition) == 0)):
 
324
            logger.info(u"Checker for %(name)s succeeded",
 
325
                        vars(self))
 
326
            if self.use_dbus:
 
327
                # Emit D-Bus signal
 
328
                self.CheckerCompleted(dbus.Boolean(True),
 
329
                                      dbus.UInt16(condition),
 
330
                                      dbus.String(command))
 
331
            self.bump_timeout()
 
332
        elif not os.WIFEXITED(condition):
 
333
            logger.warning(u"Checker for %(name)s crashed?",
473
334
                           vars(self))
 
335
            if self.use_dbus:
 
336
                # Emit D-Bus signal
 
337
                self.CheckerCompleted(dbus.Boolean(False),
 
338
                                      dbus.UInt16(condition),
 
339
                                      dbus.String(command))
 
340
        else:
 
341
            logger.info(u"Checker for %(name)s failed",
 
342
                        vars(self))
 
343
            if self.use_dbus:
 
344
                # Emit D-Bus signal
 
345
                self.CheckerCompleted(dbus.Boolean(False),
 
346
                                      dbus.UInt16(condition),
 
347
                                      dbus.String(command))
474
348
    
475
 
    def checked_ok(self, timeout=None):
 
349
    def bump_timeout(self):
476
350
        """Bump up the timeout for this client.
477
 
        
478
351
        This should only be called when the client has been seen,
479
352
        alive and well.
480
353
        """
481
 
        if timeout is None:
482
 
            timeout = self.timeout
483
354
        self.last_checked_ok = datetime.datetime.utcnow()
484
 
        if self.disable_initiator_tag is not None:
485
 
            gobject.source_remove(self.disable_initiator_tag)
486
 
        if getattr(self, "enabled", False):
487
 
            self.disable_initiator_tag = (gobject.timeout_add
488
 
                                          (_timedelta_to_milliseconds
489
 
                                           (timeout), self.disable))
490
 
            self.expires = datetime.datetime.utcnow() + timeout
491
 
    
492
 
    def need_approval(self):
493
 
        self.last_approval_request = datetime.datetime.utcnow()
 
355
        gobject.source_remove(self.disable_initiator_tag)
 
356
        self.disable_initiator_tag = (gobject.timeout_add
 
357
                                      (self.timeout_milliseconds(),
 
358
                                       self.disable))
 
359
        if self.use_dbus:
 
360
            # Emit D-Bus signal
 
361
            self.PropertyChanged(
 
362
                dbus.String(u"last_checked_ok"),
 
363
                (_datetime_to_dbus(self.last_checked_ok,
 
364
                                   variant_level=1)))
494
365
    
495
366
    def start_checker(self):
496
367
        """Start a new checker subprocess if one is not running.
497
 
        
498
368
        If a checker already exists, leave it running and do
499
369
        nothing."""
500
370
        # The reason for not killing a running checker is that if we
503
373
        # client would inevitably timeout, since no checker would get
504
374
        # a chance to run to completion.  If we instead leave running
505
375
        # checkers alone, the checker would have to take more time
506
 
        # than 'timeout' for the client to be disabled, which is as it
507
 
        # should be.
508
 
        
509
 
        # If a checker exists, make sure it is not a zombie
510
 
        try:
511
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
512
 
        except (AttributeError, OSError) as error:
513
 
            if (isinstance(error, OSError)
514
 
                and error.errno != errno.ECHILD):
515
 
                raise error
516
 
        else:
517
 
            if pid:
518
 
                logger.warning("Checker was a zombie")
519
 
                gobject.source_remove(self.checker_callback_tag)
520
 
                self.checker_callback(pid, status,
521
 
                                      self.current_checker_command)
522
 
        # Start a new checker if needed
 
376
        # than 'timeout' for the client to be declared invalid, which
 
377
        # is as it should be.
523
378
        if self.checker is None:
524
379
            try:
525
380
                # In case checker_command has exactly one % operator
526
381
                command = self.checker_command % self.host
527
382
            except TypeError:
528
383
                # Escape attributes for the shell
529
 
                escaped_attrs = dict(
530
 
                    (attr,
531
 
                     re.escape(unicode(str(getattr(self, attr, "")),
532
 
                                       errors=
533
 
                                       'replace')))
534
 
                    for attr in
535
 
                    self.runtime_expansions)
536
 
                
 
384
                escaped_attrs = dict((key, re.escape(str(val)))
 
385
                                     for key, val in
 
386
                                     vars(self).iteritems())
537
387
                try:
538
388
                    command = self.checker_command % escaped_attrs
539
 
                except TypeError as error:
540
 
                    logger.error('Could not format string "%s":'
541
 
                                 ' %s', self.checker_command, error)
 
389
                except TypeError, error:
 
390
                    logger.error(u'Could not format string "%s":'
 
391
                                 u' %s', self.checker_command, error)
542
392
                    return True # Try again later
543
 
            self.current_checker_command = command
544
393
            try:
545
 
                logger.info("Starting checker %r for %s",
 
394
                logger.info(u"Starting checker %r for %s",
546
395
                            command, self.name)
547
396
                # We don't need to redirect stdout and stderr, since
548
397
                # in normal mode, that is already done by daemon(),
551
400
                self.checker = subprocess.Popen(command,
552
401
                                                close_fds=True,
553
402
                                                shell=True, cwd="/")
 
403
                if self.use_dbus:
 
404
                    # Emit D-Bus signal
 
405
                    self.CheckerStarted(command)
 
406
                    self.PropertyChanged(
 
407
                        dbus.String("checker_running"),
 
408
                        dbus.Boolean(True, variant_level=1))
554
409
                self.checker_callback_tag = (gobject.child_watch_add
555
410
                                             (self.checker.pid,
556
411
                                              self.checker_callback,
557
412
                                              data=command))
558
 
                # The checker may have completed before the gobject
559
 
                # watch was added.  Check for this.
560
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
561
 
                if pid:
562
 
                    gobject.source_remove(self.checker_callback_tag)
563
 
                    self.checker_callback(pid, status, command)
564
 
            except OSError as error:
565
 
                logger.error("Failed to start subprocess: %s",
 
413
            except OSError, error:
 
414
                logger.error(u"Failed to start subprocess: %s",
566
415
                             error)
567
416
        # Re-run this periodically if run by gobject.timeout_add
568
417
        return True
574
423
            self.checker_callback_tag = None
575
424
        if getattr(self, "checker", None) is None:
576
425
            return
577
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
426
        logger.debug(u"Stopping checker for %(name)s", vars(self))
578
427
        try:
579
428
            os.kill(self.checker.pid, signal.SIGTERM)
580
 
            #time.sleep(0.5)
 
429
            #os.sleep(0.5)
581
430
            #if self.checker.poll() is None:
582
431
            #    os.kill(self.checker.pid, signal.SIGKILL)
583
 
        except OSError as error:
 
432
        except OSError, error:
584
433
            if error.errno != errno.ESRCH: # No such process
585
434
                raise
586
435
        self.checker = None
587
 
 
588
 
    # Encrypts a client secret and stores it in a varible encrypted_secret
589
 
    def encrypt_secret(self, key):
590
 
        # Encryption-key need to be specific size, so we hash inputed key
591
 
        hasheng = hashlib.sha256()
592
 
        hasheng.update(key)
593
 
        encryptionkey = hasheng.digest()
594
 
 
595
 
        # Create validation hash so we know at decryption if it was sucessful
596
 
        hasheng = hashlib.sha256()
597
 
        hasheng.update(self.secret)
598
 
        validationhash = hasheng.digest()
599
 
 
600
 
        # Encrypt secret
601
 
        iv = os.urandom(Crypto.Cipher.AES.block_size)
602
 
        ciphereng = Crypto.Cipher.AES.new(encryptionkey,
603
 
                                        Crypto.Cipher.AES.MODE_CFB, iv)
604
 
        ciphertext = ciphereng.encrypt(validationhash+self.secret)
605
 
        self.encrypted_secret = (ciphertext, iv)
606
 
 
607
 
    # Decrypt a encrypted client secret
608
 
    def decrypt_secret(self, key):
609
 
        # Decryption-key need to be specific size, so we hash inputed key
610
 
        hasheng = hashlib.sha256()
611
 
        hasheng.update(key)
612
 
        encryptionkey = hasheng.digest()
613
 
 
614
 
        # Decrypt encrypted secret
615
 
        ciphertext, iv = self.encrypted_secret
616
 
        ciphereng = Crypto.Cipher.AES.new(encryptionkey,
617
 
                                        Crypto.Cipher.AES.MODE_CFB, iv)
618
 
        plain = ciphereng.decrypt(ciphertext)
619
 
 
620
 
        # Validate decrypted secret to know if it was succesful
621
 
        hasheng = hashlib.sha256()
622
 
        validationhash = plain[:hasheng.digest_size]
623
 
        secret = plain[hasheng.digest_size:]
624
 
        hasheng.update(secret)
625
 
 
626
 
        # if validation fails, we use key as new secret. Otherwhise, we use
627
 
        # the decrypted secret
628
 
        if hasheng.digest() == validationhash:
629
 
            self.secret = secret
630
 
        else:
631
 
            self.secret = key
632
 
        del self.encrypted_secret
633
 
 
634
 
 
635
 
def dbus_service_property(dbus_interface, signature="v",
636
 
                          access="readwrite", byte_arrays=False):
637
 
    """Decorators for marking methods of a DBusObjectWithProperties to
638
 
    become properties on the D-Bus.
639
 
    
640
 
    The decorated method will be called with no arguments by "Get"
641
 
    and with one argument by "Set".
642
 
    
643
 
    The parameters, where they are supported, are the same as
644
 
    dbus.service.method, except there is only "signature", since the
645
 
    type from Get() and the type sent to Set() is the same.
646
 
    """
647
 
    # Encoding deeply encoded byte arrays is not supported yet by the
648
 
    # "Set" method, so we fail early here:
649
 
    if byte_arrays and signature != "ay":
650
 
        raise ValueError("Byte arrays not supported for non-'ay'"
651
 
                         " signature %r" % signature)
652
 
    def decorator(func):
653
 
        func._dbus_is_property = True
654
 
        func._dbus_interface = dbus_interface
655
 
        func._dbus_signature = signature
656
 
        func._dbus_access = access
657
 
        func._dbus_name = func.__name__
658
 
        if func._dbus_name.endswith("_dbus_property"):
659
 
            func._dbus_name = func._dbus_name[:-14]
660
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
661
 
        return func
662
 
    return decorator
663
 
 
664
 
 
665
 
class DBusPropertyException(dbus.exceptions.DBusException):
666
 
    """A base class for D-Bus property-related exceptions
667
 
    """
668
 
    def __unicode__(self):
669
 
        return unicode(str(self))
670
 
 
671
 
 
672
 
class DBusPropertyAccessException(DBusPropertyException):
673
 
    """A property's access permissions disallows an operation.
674
 
    """
675
 
    pass
676
 
 
677
 
 
678
 
class DBusPropertyNotFound(DBusPropertyException):
679
 
    """An attempt was made to access a non-existing property.
680
 
    """
681
 
    pass
682
 
 
683
 
 
684
 
class DBusObjectWithProperties(dbus.service.Object):
685
 
    """A D-Bus object with properties.
686
 
    
687
 
    Classes inheriting from this can use the dbus_service_property
688
 
    decorator to expose methods as D-Bus properties.  It exposes the
689
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
690
 
    """
691
 
    
692
 
    @staticmethod
693
 
    def _is_dbus_property(obj):
694
 
        return getattr(obj, "_dbus_is_property", False)
695
 
    
696
 
    def _get_all_dbus_properties(self):
697
 
        """Returns a generator of (name, attribute) pairs
698
 
        """
699
 
        return ((prop.__get__(self)._dbus_name, prop.__get__(self))
700
 
                for cls in self.__class__.__mro__
701
 
                for name, prop in
702
 
                inspect.getmembers(cls, self._is_dbus_property))
703
 
    
704
 
    def _get_dbus_property(self, interface_name, property_name):
705
 
        """Returns a bound method if one exists which is a D-Bus
706
 
        property with the specified name and interface.
707
 
        """
708
 
        for cls in  self.__class__.__mro__:
709
 
            for name, value in (inspect.getmembers
710
 
                                (cls, self._is_dbus_property)):
711
 
                if (value._dbus_name == property_name
712
 
                    and value._dbus_interface == interface_name):
713
 
                    return value.__get__(self)
714
 
        
715
 
        # No such property
716
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
717
 
                                   + interface_name + "."
718
 
                                   + property_name)
719
 
    
720
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
721
 
                         out_signature="v")
722
 
    def Get(self, interface_name, property_name):
723
 
        """Standard D-Bus property Get() method, see D-Bus standard.
724
 
        """
725
 
        prop = self._get_dbus_property(interface_name, property_name)
726
 
        if prop._dbus_access == "write":
727
 
            raise DBusPropertyAccessException(property_name)
728
 
        value = prop()
729
 
        if not hasattr(value, "variant_level"):
730
 
            return value
731
 
        return type(value)(value, variant_level=value.variant_level+1)
732
 
    
733
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
734
 
    def Set(self, interface_name, property_name, value):
735
 
        """Standard D-Bus property Set() method, see D-Bus standard.
736
 
        """
737
 
        prop = self._get_dbus_property(interface_name, property_name)
738
 
        if prop._dbus_access == "read":
739
 
            raise DBusPropertyAccessException(property_name)
740
 
        if prop._dbus_get_args_options["byte_arrays"]:
741
 
            # The byte_arrays option is not supported yet on
742
 
            # signatures other than "ay".
743
 
            if prop._dbus_signature != "ay":
744
 
                raise ValueError
745
 
            value = dbus.ByteArray(''.join(unichr(byte)
746
 
                                           for byte in value))
747
 
        prop(value)
748
 
    
749
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
750
 
                         out_signature="a{sv}")
751
 
    def GetAll(self, interface_name):
752
 
        """Standard D-Bus property GetAll() method, see D-Bus
753
 
        standard.
754
 
        
755
 
        Note: Will not include properties with access="write".
756
 
        """
757
 
        all = {}
758
 
        for name, prop in self._get_all_dbus_properties():
759
 
            if (interface_name
760
 
                and interface_name != prop._dbus_interface):
761
 
                # Interface non-empty but did not match
762
 
                continue
763
 
            # Ignore write-only properties
764
 
            if prop._dbus_access == "write":
765
 
                continue
766
 
            value = prop()
767
 
            if not hasattr(value, "variant_level"):
768
 
                all[name] = value
769
 
                continue
770
 
            all[name] = type(value)(value, variant_level=
771
 
                                    value.variant_level+1)
772
 
        return dbus.Dictionary(all, signature="sv")
773
 
    
774
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
775
 
                         out_signature="s",
776
 
                         path_keyword='object_path',
777
 
                         connection_keyword='connection')
778
 
    def Introspect(self, object_path, connection):
779
 
        """Standard D-Bus method, overloaded to insert property tags.
780
 
        """
781
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
782
 
                                                   connection)
783
 
        try:
784
 
            document = xml.dom.minidom.parseString(xmlstring)
785
 
            def make_tag(document, name, prop):
786
 
                e = document.createElement("property")
787
 
                e.setAttribute("name", name)
788
 
                e.setAttribute("type", prop._dbus_signature)
789
 
                e.setAttribute("access", prop._dbus_access)
790
 
                return e
791
 
            for if_tag in document.getElementsByTagName("interface"):
792
 
                for tag in (make_tag(document, name, prop)
793
 
                            for name, prop
794
 
                            in self._get_all_dbus_properties()
795
 
                            if prop._dbus_interface
796
 
                            == if_tag.getAttribute("name")):
797
 
                    if_tag.appendChild(tag)
798
 
                # Add the names to the return values for the
799
 
                # "org.freedesktop.DBus.Properties" methods
800
 
                if (if_tag.getAttribute("name")
801
 
                    == "org.freedesktop.DBus.Properties"):
802
 
                    for cn in if_tag.getElementsByTagName("method"):
803
 
                        if cn.getAttribute("name") == "Get":
804
 
                            for arg in cn.getElementsByTagName("arg"):
805
 
                                if (arg.getAttribute("direction")
806
 
                                    == "out"):
807
 
                                    arg.setAttribute("name", "value")
808
 
                        elif cn.getAttribute("name") == "GetAll":
809
 
                            for arg in cn.getElementsByTagName("arg"):
810
 
                                if (arg.getAttribute("direction")
811
 
                                    == "out"):
812
 
                                    arg.setAttribute("name", "props")
813
 
            xmlstring = document.toxml("utf-8")
814
 
            document.unlink()
815
 
        except (AttributeError, xml.dom.DOMException,
816
 
                xml.parsers.expat.ExpatError) as error:
817
 
            logger.error("Failed to override Introspection method",
818
 
                         error)
819
 
        return xmlstring
820
 
 
821
 
 
822
 
def datetime_to_dbus (dt, variant_level=0):
823
 
    """Convert a UTC datetime.datetime() to a D-Bus type."""
824
 
    if dt is None:
825
 
        return dbus.String("", variant_level = variant_level)
826
 
    return dbus.String(dt.isoformat(),
827
 
                       variant_level=variant_level)
828
 
 
829
 
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
830
 
                                  .__metaclass__):
831
 
    """Applied to an empty subclass of a D-Bus object, this metaclass
832
 
    will add additional D-Bus attributes matching a certain pattern.
833
 
    """
834
 
    def __new__(mcs, name, bases, attr):
835
 
        # Go through all the base classes which could have D-Bus
836
 
        # methods, signals, or properties in them
837
 
        for base in (b for b in bases
838
 
                     if issubclass(b, dbus.service.Object)):
839
 
            # Go though all attributes of the base class
840
 
            for attrname, attribute in inspect.getmembers(base):
841
 
                # Ignore non-D-Bus attributes, and D-Bus attributes
842
 
                # with the wrong interface name
843
 
                if (not hasattr(attribute, "_dbus_interface")
844
 
                    or not attribute._dbus_interface
845
 
                    .startswith("se.recompile.Mandos")):
846
 
                    continue
847
 
                # Create an alternate D-Bus interface name based on
848
 
                # the current name
849
 
                alt_interface = (attribute._dbus_interface
850
 
                                 .replace("se.recompile.Mandos",
851
 
                                          "se.bsnet.fukt.Mandos"))
852
 
                # Is this a D-Bus signal?
853
 
                if getattr(attribute, "_dbus_is_signal", False):
854
 
                    # Extract the original non-method function by
855
 
                    # black magic
856
 
                    nonmethod_func = (dict(
857
 
                            zip(attribute.func_code.co_freevars,
858
 
                                attribute.__closure__))["func"]
859
 
                                      .cell_contents)
860
 
                    # Create a new, but exactly alike, function
861
 
                    # object, and decorate it to be a new D-Bus signal
862
 
                    # with the alternate D-Bus interface name
863
 
                    new_function = (dbus.service.signal
864
 
                                    (alt_interface,
865
 
                                     attribute._dbus_signature)
866
 
                                    (types.FunctionType(
867
 
                                nonmethod_func.func_code,
868
 
                                nonmethod_func.func_globals,
869
 
                                nonmethod_func.func_name,
870
 
                                nonmethod_func.func_defaults,
871
 
                                nonmethod_func.func_closure)))
872
 
                    # Define a creator of a function to call both the
873
 
                    # old and new functions, so both the old and new
874
 
                    # signals gets sent when the function is called
875
 
                    def fixscope(func1, func2):
876
 
                        """This function is a scope container to pass
877
 
                        func1 and func2 to the "call_both" function
878
 
                        outside of its arguments"""
879
 
                        def call_both(*args, **kwargs):
880
 
                            """This function will emit two D-Bus
881
 
                            signals by calling func1 and func2"""
882
 
                            func1(*args, **kwargs)
883
 
                            func2(*args, **kwargs)
884
 
                        return call_both
885
 
                    # Create the "call_both" function and add it to
886
 
                    # the class
887
 
                    attr[attrname] = fixscope(attribute,
888
 
                                              new_function)
889
 
                # Is this a D-Bus method?
890
 
                elif getattr(attribute, "_dbus_is_method", False):
891
 
                    # Create a new, but exactly alike, function
892
 
                    # object.  Decorate it to be a new D-Bus method
893
 
                    # with the alternate D-Bus interface name.  Add it
894
 
                    # to the class.
895
 
                    attr[attrname] = (dbus.service.method
896
 
                                      (alt_interface,
897
 
                                       attribute._dbus_in_signature,
898
 
                                       attribute._dbus_out_signature)
899
 
                                      (types.FunctionType
900
 
                                       (attribute.func_code,
901
 
                                        attribute.func_globals,
902
 
                                        attribute.func_name,
903
 
                                        attribute.func_defaults,
904
 
                                        attribute.func_closure)))
905
 
                # Is this a D-Bus property?
906
 
                elif getattr(attribute, "_dbus_is_property", False):
907
 
                    # Create a new, but exactly alike, function
908
 
                    # object, and decorate it to be a new D-Bus
909
 
                    # property with the alternate D-Bus interface
910
 
                    # name.  Add it to the class.
911
 
                    attr[attrname] = (dbus_service_property
912
 
                                      (alt_interface,
913
 
                                       attribute._dbus_signature,
914
 
                                       attribute._dbus_access,
915
 
                                       attribute
916
 
                                       ._dbus_get_args_options
917
 
                                       ["byte_arrays"])
918
 
                                      (types.FunctionType
919
 
                                       (attribute.func_code,
920
 
                                        attribute.func_globals,
921
 
                                        attribute.func_name,
922
 
                                        attribute.func_defaults,
923
 
                                        attribute.func_closure)))
924
 
        return type.__new__(mcs, name, bases, attr)
925
 
 
926
 
class ClientDBus(Client, DBusObjectWithProperties):
927
 
    """A Client class using D-Bus
928
 
    
929
 
    Attributes:
930
 
    dbus_object_path: dbus.ObjectPath
931
 
    bus: dbus.SystemBus()
932
 
    """
933
 
    
934
 
    runtime_expansions = (Client.runtime_expansions
935
 
                          + ("dbus_object_path",))
936
 
    
937
 
    # dbus.service.Object doesn't use super(), so we can't either.
938
 
    
939
 
    def __init__(self, bus = None, *args, **kwargs):
940
 
        self.bus = bus
941
 
        Client.__init__(self, *args, **kwargs)
942
 
 
943
 
        self._approvals_pending = 0
944
 
        # Only now, when this client is initialized, can it show up on
945
 
        # the D-Bus
946
 
        client_object_name = unicode(self.name).translate(
947
 
            {ord("."): ord("_"),
948
 
             ord("-"): ord("_")})
949
 
        self.dbus_object_path = (dbus.ObjectPath
950
 
                                 ("/clients/" + client_object_name))
951
 
        DBusObjectWithProperties.__init__(self, self.bus,
952
 
                                          self.dbus_object_path)
953
 
        
954
 
    def notifychangeproperty(transform_func,
955
 
                             dbus_name, type_func=lambda x: x,
956
 
                             variant_level=1):
957
 
        """ Modify a variable so that it's a property which announces
958
 
        its changes to DBus.
959
 
 
960
 
        transform_fun: Function that takes a value and a variant_level
961
 
                       and transforms it to a D-Bus type.
962
 
        dbus_name: D-Bus name of the variable
963
 
        type_func: Function that transform the value before sending it
964
 
                   to the D-Bus.  Default: no transform
965
 
        variant_level: D-Bus variant level.  Default: 1
966
 
        """
967
 
        attrname = "_{0}".format(dbus_name)
968
 
        def setter(self, value):
969
 
            if hasattr(self, "dbus_object_path"):
970
 
                if (not hasattr(self, attrname) or
971
 
                    type_func(getattr(self, attrname, None))
972
 
                    != type_func(value)):
973
 
                    dbus_value = transform_func(type_func(value),
974
 
                                                variant_level
975
 
                                                =variant_level)
976
 
                    self.PropertyChanged(dbus.String(dbus_name),
977
 
                                         dbus_value)
978
 
            setattr(self, attrname, value)
979
 
        
980
 
        return property(lambda self: getattr(self, attrname), setter)
981
 
    
982
 
    
983
 
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
984
 
    approvals_pending = notifychangeproperty(dbus.Boolean,
985
 
                                             "ApprovalPending",
986
 
                                             type_func = bool)
987
 
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
988
 
    last_enabled = notifychangeproperty(datetime_to_dbus,
989
 
                                        "LastEnabled")
990
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
991
 
                                   type_func = lambda checker:
992
 
                                       checker is not None)
993
 
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
994
 
                                           "LastCheckedOK")
995
 
    last_approval_request = notifychangeproperty(
996
 
        datetime_to_dbus, "LastApprovalRequest")
997
 
    approved_by_default = notifychangeproperty(dbus.Boolean,
998
 
                                               "ApprovedByDefault")
999
 
    approval_delay = notifychangeproperty(dbus.UInt16,
1000
 
                                          "ApprovalDelay",
1001
 
                                          type_func =
1002
 
                                          _timedelta_to_milliseconds)
1003
 
    approval_duration = notifychangeproperty(
1004
 
        dbus.UInt16, "ApprovalDuration",
1005
 
        type_func = _timedelta_to_milliseconds)
1006
 
    host = notifychangeproperty(dbus.String, "Host")
1007
 
    timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1008
 
                                   type_func =
1009
 
                                   _timedelta_to_milliseconds)
1010
 
    extended_timeout = notifychangeproperty(
1011
 
        dbus.UInt16, "ExtendedTimeout",
1012
 
        type_func = _timedelta_to_milliseconds)
1013
 
    interval = notifychangeproperty(dbus.UInt16,
1014
 
                                    "Interval",
1015
 
                                    type_func =
1016
 
                                    _timedelta_to_milliseconds)
1017
 
    checker_command = notifychangeproperty(dbus.String, "Checker")
1018
 
    
1019
 
    del notifychangeproperty
1020
 
    
1021
 
    def __del__(self, *args, **kwargs):
1022
 
        try:
1023
 
            self.remove_from_connection()
1024
 
        except LookupError:
1025
 
            pass
1026
 
        if hasattr(DBusObjectWithProperties, "__del__"):
1027
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1028
 
        Client.__del__(self, *args, **kwargs)
1029
 
    
1030
 
    def checker_callback(self, pid, condition, command,
1031
 
                         *args, **kwargs):
1032
 
        self.checker_callback_tag = None
1033
 
        self.checker = None
1034
 
        if os.WIFEXITED(condition):
1035
 
            exitstatus = os.WEXITSTATUS(condition)
1036
 
            # Emit D-Bus signal
1037
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
1038
 
                                  dbus.Int64(condition),
1039
 
                                  dbus.String(command))
1040
 
        else:
1041
 
            # Emit D-Bus signal
1042
 
            self.CheckerCompleted(dbus.Int16(-1),
1043
 
                                  dbus.Int64(condition),
1044
 
                                  dbus.String(command))
1045
 
        
1046
 
        return Client.checker_callback(self, pid, condition, command,
1047
 
                                       *args, **kwargs)
1048
 
    
1049
 
    def start_checker(self, *args, **kwargs):
1050
 
        old_checker = self.checker
1051
 
        if self.checker is not None:
1052
 
            old_checker_pid = self.checker.pid
1053
 
        else:
1054
 
            old_checker_pid = None
1055
 
        r = Client.start_checker(self, *args, **kwargs)
1056
 
        # Only if new checker process was started
1057
 
        if (self.checker is not None
1058
 
            and old_checker_pid != self.checker.pid):
1059
 
            # Emit D-Bus signal
1060
 
            self.CheckerStarted(self.current_checker_command)
1061
 
        return r
1062
 
    
1063
 
    def _reset_approved(self):
1064
 
        self._approved = None
1065
 
        return False
1066
 
    
1067
 
    def approve(self, value=True):
1068
 
        self.send_changedstate()
1069
 
        self._approved = value
1070
 
        gobject.timeout_add(_timedelta_to_milliseconds
1071
 
                            (self.approval_duration),
1072
 
                            self._reset_approved)
1073
 
    
1074
 
    
1075
 
    ## D-Bus methods, signals & properties
1076
 
    _interface = "se.recompile.Mandos.Client"
1077
 
    
1078
 
    ## Signals
 
436
        if self.use_dbus:
 
437
            self.PropertyChanged(dbus.String(u"checker_running"),
 
438
                                 dbus.Boolean(False, variant_level=1))
 
439
    
 
440
    def still_valid(self):
 
441
        """Has the timeout not yet passed for this client?"""
 
442
        if not getattr(self, "enabled", False):
 
443
            return False
 
444
        now = datetime.datetime.utcnow()
 
445
        if self.last_checked_ok is None:
 
446
            return now < (self.created + self.timeout)
 
447
        else:
 
448
            return now < (self.last_checked_ok + self.timeout)
 
449
    
 
450
    ## D-Bus methods & signals
 
451
    _interface = u"org.mandos_system.Mandos.Client"
 
452
    
 
453
    # BumpTimeout - method
 
454
    BumpTimeout = dbus.service.method(_interface)(bump_timeout)
 
455
    BumpTimeout.__name__ = "BumpTimeout"
1079
456
    
1080
457
    # CheckerCompleted - signal
1081
 
    @dbus.service.signal(_interface, signature="nxs")
1082
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
 
458
    @dbus.service.signal(_interface, signature="bqs")
 
459
    def CheckerCompleted(self, success, condition, command):
1083
460
        "D-Bus signal"
1084
461
        pass
1085
462
    
1089
466
        "D-Bus signal"
1090
467
        pass
1091
468
    
 
469
    # GetAllProperties - method
 
470
    @dbus.service.method(_interface, out_signature="a{sv}")
 
471
    def GetAllProperties(self):
 
472
        "D-Bus method"
 
473
        return dbus.Dictionary({
 
474
                dbus.String("name"):
 
475
                    dbus.String(self.name, variant_level=1),
 
476
                dbus.String("fingerprint"):
 
477
                    dbus.String(self.fingerprint, variant_level=1),
 
478
                dbus.String("host"):
 
479
                    dbus.String(self.host, variant_level=1),
 
480
                dbus.String("created"):
 
481
                    _datetime_to_dbus(self.created, variant_level=1),
 
482
                dbus.String("last_enabled"):
 
483
                    (_datetime_to_dbus(self.last_enabled,
 
484
                                       variant_level=1)
 
485
                     if self.last_enabled is not None
 
486
                     else dbus.Boolean(False, variant_level=1)),
 
487
                dbus.String("enabled"):
 
488
                    dbus.Boolean(self.enabled, variant_level=1),
 
489
                dbus.String("last_checked_ok"):
 
490
                    (_datetime_to_dbus(self.last_checked_ok,
 
491
                                       variant_level=1)
 
492
                     if self.last_checked_ok is not None
 
493
                     else dbus.Boolean (False, variant_level=1)),
 
494
                dbus.String("timeout"):
 
495
                    dbus.UInt64(self.timeout_milliseconds(),
 
496
                                variant_level=1),
 
497
                dbus.String("interval"):
 
498
                    dbus.UInt64(self.interval_milliseconds(),
 
499
                                variant_level=1),
 
500
                dbus.String("checker"):
 
501
                    dbus.String(self.checker_command,
 
502
                                variant_level=1),
 
503
                dbus.String("checker_running"):
 
504
                    dbus.Boolean(self.checker is not None,
 
505
                                 variant_level=1),
 
506
                }, signature="sv")
 
507
    
 
508
    # IsStillValid - method
 
509
    IsStillValid = (dbus.service.method(_interface, out_signature="b")
 
510
                    (still_valid))
 
511
    IsStillValid.__name__ = "IsStillValid"
 
512
    
1092
513
    # PropertyChanged - signal
1093
514
    @dbus.service.signal(_interface, signature="sv")
1094
515
    def PropertyChanged(self, property, value):
1095
516
        "D-Bus signal"
1096
517
        pass
1097
518
    
1098
 
    # GotSecret - signal
1099
 
    @dbus.service.signal(_interface)
1100
 
    def GotSecret(self):
1101
 
        """D-Bus signal
1102
 
        Is sent after a successful transfer of secret from the Mandos
1103
 
        server to mandos-client
1104
 
        """
1105
 
        pass
1106
 
    
1107
 
    # Rejected - signal
1108
 
    @dbus.service.signal(_interface, signature="s")
1109
 
    def Rejected(self, reason):
1110
 
        "D-Bus signal"
1111
 
        pass
1112
 
    
1113
 
    # NeedApproval - signal
1114
 
    @dbus.service.signal(_interface, signature="tb")
1115
 
    def NeedApproval(self, timeout, default):
1116
 
        "D-Bus signal"
1117
 
        return self.need_approval()
1118
 
    
1119
 
    ## Methods
1120
 
    
1121
 
    # Approve - method
1122
 
    @dbus.service.method(_interface, in_signature="b")
1123
 
    def Approve(self, value):
1124
 
        self.approve(value)
1125
 
    
1126
 
    # CheckedOK - method
1127
 
    @dbus.service.method(_interface)
1128
 
    def CheckedOK(self):
1129
 
        self.checked_ok()
 
519
    # SetChecker - method
 
520
    @dbus.service.method(_interface, in_signature="s")
 
521
    def SetChecker(self, checker):
 
522
        "D-Bus setter method"
 
523
        self.checker_command = checker
 
524
        # Emit D-Bus signal
 
525
        self.PropertyChanged(dbus.String(u"checker"),
 
526
                             dbus.String(self.checker_command,
 
527
                                         variant_level=1))
 
528
    
 
529
    # SetHost - method
 
530
    @dbus.service.method(_interface, in_signature="s")
 
531
    def SetHost(self, host):
 
532
        "D-Bus setter method"
 
533
        self.host = host
 
534
        # Emit D-Bus signal
 
535
        self.PropertyChanged(dbus.String(u"host"),
 
536
                             dbus.String(self.host, variant_level=1))
 
537
    
 
538
    # SetInterval - method
 
539
    @dbus.service.method(_interface, in_signature="t")
 
540
    def SetInterval(self, milliseconds):
 
541
        self.interval = datetime.timedelta(0, 0, 0, milliseconds)
 
542
        # Emit D-Bus signal
 
543
        self.PropertyChanged(dbus.String(u"interval"),
 
544
                             (dbus.UInt64(self.interval_milliseconds(),
 
545
                                          variant_level=1)))
 
546
    
 
547
    # SetSecret - method
 
548
    @dbus.service.method(_interface, in_signature="ay",
 
549
                         byte_arrays=True)
 
550
    def SetSecret(self, secret):
 
551
        "D-Bus setter method"
 
552
        self.secret = str(secret)
 
553
    
 
554
    # SetTimeout - method
 
555
    @dbus.service.method(_interface, in_signature="t")
 
556
    def SetTimeout(self, milliseconds):
 
557
        self.timeout = datetime.timedelta(0, 0, 0, milliseconds)
 
558
        # Emit D-Bus signal
 
559
        self.PropertyChanged(dbus.String(u"timeout"),
 
560
                             (dbus.UInt64(self.timeout_milliseconds(),
 
561
                                          variant_level=1)))
1130
562
    
1131
563
    # Enable - method
1132
 
    @dbus.service.method(_interface)
1133
 
    def Enable(self):
1134
 
        "D-Bus method"
1135
 
        self.enable()
 
564
    Enable = dbus.service.method(_interface)(enable)
 
565
    Enable.__name__ = "Enable"
1136
566
    
1137
567
    # StartChecker - method
1138
568
    @dbus.service.method(_interface)
1147
577
        self.disable()
1148
578
    
1149
579
    # StopChecker - method
1150
 
    @dbus.service.method(_interface)
1151
 
    def StopChecker(self):
1152
 
        self.stop_checker()
1153
 
    
1154
 
    ## Properties
1155
 
    
1156
 
    # ApprovalPending - property
1157
 
    @dbus_service_property(_interface, signature="b", access="read")
1158
 
    def ApprovalPending_dbus_property(self):
1159
 
        return dbus.Boolean(bool(self.approvals_pending))
1160
 
    
1161
 
    # ApprovedByDefault - property
1162
 
    @dbus_service_property(_interface, signature="b",
1163
 
                           access="readwrite")
1164
 
    def ApprovedByDefault_dbus_property(self, value=None):
1165
 
        if value is None:       # get
1166
 
            return dbus.Boolean(self.approved_by_default)
1167
 
        self.approved_by_default = bool(value)
1168
 
    
1169
 
    # ApprovalDelay - property
1170
 
    @dbus_service_property(_interface, signature="t",
1171
 
                           access="readwrite")
1172
 
    def ApprovalDelay_dbus_property(self, value=None):
1173
 
        if value is None:       # get
1174
 
            return dbus.UInt64(self.approval_delay_milliseconds())
1175
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1176
 
    
1177
 
    # ApprovalDuration - property
1178
 
    @dbus_service_property(_interface, signature="t",
1179
 
                           access="readwrite")
1180
 
    def ApprovalDuration_dbus_property(self, value=None):
1181
 
        if value is None:       # get
1182
 
            return dbus.UInt64(_timedelta_to_milliseconds(
1183
 
                    self.approval_duration))
1184
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1185
 
    
1186
 
    # Name - property
1187
 
    @dbus_service_property(_interface, signature="s", access="read")
1188
 
    def Name_dbus_property(self):
1189
 
        return dbus.String(self.name)
1190
 
    
1191
 
    # Fingerprint - property
1192
 
    @dbus_service_property(_interface, signature="s", access="read")
1193
 
    def Fingerprint_dbus_property(self):
1194
 
        return dbus.String(self.fingerprint)
1195
 
    
1196
 
    # Host - property
1197
 
    @dbus_service_property(_interface, signature="s",
1198
 
                           access="readwrite")
1199
 
    def Host_dbus_property(self, value=None):
1200
 
        if value is None:       # get
1201
 
            return dbus.String(self.host)
1202
 
        self.host = value
1203
 
    
1204
 
    # Created - property
1205
 
    @dbus_service_property(_interface, signature="s", access="read")
1206
 
    def Created_dbus_property(self):
1207
 
        return dbus.String(datetime_to_dbus(self.created))
1208
 
    
1209
 
    # LastEnabled - property
1210
 
    @dbus_service_property(_interface, signature="s", access="read")
1211
 
    def LastEnabled_dbus_property(self):
1212
 
        return datetime_to_dbus(self.last_enabled)
1213
 
    
1214
 
    # Enabled - property
1215
 
    @dbus_service_property(_interface, signature="b",
1216
 
                           access="readwrite")
1217
 
    def Enabled_dbus_property(self, value=None):
1218
 
        if value is None:       # get
1219
 
            return dbus.Boolean(self.enabled)
1220
 
        if value:
1221
 
            self.enable()
1222
 
        else:
1223
 
            self.disable()
1224
 
    
1225
 
    # LastCheckedOK - property
1226
 
    @dbus_service_property(_interface, signature="s",
1227
 
                           access="readwrite")
1228
 
    def LastCheckedOK_dbus_property(self, value=None):
1229
 
        if value is not None:
1230
 
            self.checked_ok()
1231
 
            return
1232
 
        return datetime_to_dbus(self.last_checked_ok)
1233
 
    
1234
 
    # Expires - property
1235
 
    @dbus_service_property(_interface, signature="s", access="read")
1236
 
    def Expires_dbus_property(self):
1237
 
        return datetime_to_dbus(self.expires)
1238
 
    
1239
 
    # LastApprovalRequest - property
1240
 
    @dbus_service_property(_interface, signature="s", access="read")
1241
 
    def LastApprovalRequest_dbus_property(self):
1242
 
        return datetime_to_dbus(self.last_approval_request)
1243
 
    
1244
 
    # Timeout - property
1245
 
    @dbus_service_property(_interface, signature="t",
1246
 
                           access="readwrite")
1247
 
    def Timeout_dbus_property(self, value=None):
1248
 
        if value is None:       # get
1249
 
            return dbus.UInt64(self.timeout_milliseconds())
1250
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1251
 
        if getattr(self, "disable_initiator_tag", None) is None:
1252
 
            return
1253
 
        # Reschedule timeout
1254
 
        gobject.source_remove(self.disable_initiator_tag)
1255
 
        self.disable_initiator_tag = None
1256
 
        self.expires = None
1257
 
        time_to_die = _timedelta_to_milliseconds((self
1258
 
                                                  .last_checked_ok
1259
 
                                                  + self.timeout)
1260
 
                                                 - datetime.datetime
1261
 
                                                 .utcnow())
1262
 
        if time_to_die <= 0:
1263
 
            # The timeout has passed
1264
 
            self.disable()
1265
 
        else:
1266
 
            self.expires = (datetime.datetime.utcnow()
1267
 
                            + datetime.timedelta(milliseconds =
1268
 
                                                 time_to_die))
1269
 
            self.disable_initiator_tag = (gobject.timeout_add
1270
 
                                          (time_to_die, self.disable))
1271
 
    
1272
 
    # ExtendedTimeout - property
1273
 
    @dbus_service_property(_interface, signature="t",
1274
 
                           access="readwrite")
1275
 
    def ExtendedTimeout_dbus_property(self, value=None):
1276
 
        if value is None:       # get
1277
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
1278
 
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1279
 
    
1280
 
    # Interval - property
1281
 
    @dbus_service_property(_interface, signature="t",
1282
 
                           access="readwrite")
1283
 
    def Interval_dbus_property(self, value=None):
1284
 
        if value is None:       # get
1285
 
            return dbus.UInt64(self.interval_milliseconds())
1286
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1287
 
        if getattr(self, "checker_initiator_tag", None) is None:
1288
 
            return
1289
 
        # Reschedule checker run
1290
 
        gobject.source_remove(self.checker_initiator_tag)
1291
 
        self.checker_initiator_tag = (gobject.timeout_add
1292
 
                                      (value, self.start_checker))
1293
 
        self.start_checker()    # Start one now, too
1294
 
    
1295
 
    # Checker - property
1296
 
    @dbus_service_property(_interface, signature="s",
1297
 
                           access="readwrite")
1298
 
    def Checker_dbus_property(self, value=None):
1299
 
        if value is None:       # get
1300
 
            return dbus.String(self.checker_command)
1301
 
        self.checker_command = value
1302
 
    
1303
 
    # CheckerRunning - property
1304
 
    @dbus_service_property(_interface, signature="b",
1305
 
                           access="readwrite")
1306
 
    def CheckerRunning_dbus_property(self, value=None):
1307
 
        if value is None:       # get
1308
 
            return dbus.Boolean(self.checker is not None)
1309
 
        if value:
1310
 
            self.start_checker()
1311
 
        else:
1312
 
            self.stop_checker()
1313
 
    
1314
 
    # ObjectPath - property
1315
 
    @dbus_service_property(_interface, signature="o", access="read")
1316
 
    def ObjectPath_dbus_property(self):
1317
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1318
 
    
1319
 
    # Secret = property
1320
 
    @dbus_service_property(_interface, signature="ay",
1321
 
                           access="write", byte_arrays=True)
1322
 
    def Secret_dbus_property(self, value):
1323
 
        self.secret = str(value)
 
580
    StopChecker = dbus.service.method(_interface)(stop_checker)
 
581
    StopChecker.__name__ = "StopChecker"
1324
582
    
1325
583
    del _interface
1326
584
 
1327
585
 
1328
 
class ProxyClient(object):
1329
 
    def __init__(self, child_pipe, fpr, address):
1330
 
        self._pipe = child_pipe
1331
 
        self._pipe.send(('init', fpr, address))
1332
 
        if not self._pipe.recv():
1333
 
            raise KeyError()
1334
 
    
1335
 
    def __getattribute__(self, name):
1336
 
        if(name == '_pipe'):
1337
 
            return super(ProxyClient, self).__getattribute__(name)
1338
 
        self._pipe.send(('getattr', name))
1339
 
        data = self._pipe.recv()
1340
 
        if data[0] == 'data':
1341
 
            return data[1]
1342
 
        if data[0] == 'function':
1343
 
            def func(*args, **kwargs):
1344
 
                self._pipe.send(('funcall', name, args, kwargs))
1345
 
                return self._pipe.recv()[1]
1346
 
            return func
1347
 
    
1348
 
    def __setattr__(self, name, value):
1349
 
        if(name == '_pipe'):
1350
 
            return super(ProxyClient, self).__setattr__(name, value)
1351
 
        self._pipe.send(('setattr', name, value))
1352
 
 
1353
 
class ClientDBusTransitional(ClientDBus):
1354
 
    __metaclass__ = AlternateDBusNamesMetaclass
1355
 
 
1356
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1357
 
    """A class to handle client connections.
1358
 
    
1359
 
    Instantiated once for each connection to handle it.
 
586
def peer_certificate(session):
 
587
    "Return the peer's OpenPGP certificate as a bytestring"
 
588
    # If not an OpenPGP certificate...
 
589
    if (gnutls.library.functions
 
590
        .gnutls_certificate_type_get(session._c_object)
 
591
        != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
 
592
        # ...do the normal thing
 
593
        return session.peer_certificate
 
594
    list_size = ctypes.c_uint()
 
595
    cert_list = (gnutls.library.functions
 
596
                 .gnutls_certificate_get_peers
 
597
                 (session._c_object, ctypes.byref(list_size)))
 
598
    if list_size.value == 0:
 
599
        return None
 
600
    cert = cert_list[0]
 
601
    return ctypes.string_at(cert.data, cert.size)
 
602
 
 
603
 
 
604
def fingerprint(openpgp):
 
605
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
606
    # New GnuTLS "datum" with the OpenPGP public key
 
607
    datum = (gnutls.library.types
 
608
             .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
 
609
                                         ctypes.POINTER
 
610
                                         (ctypes.c_ubyte)),
 
611
                             ctypes.c_uint(len(openpgp))))
 
612
    # New empty GnuTLS certificate
 
613
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
614
    (gnutls.library.functions
 
615
     .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
616
    # Import the OpenPGP public key into the certificate
 
617
    (gnutls.library.functions
 
618
     .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
 
619
                                gnutls.library.constants
 
620
                                .GNUTLS_OPENPGP_FMT_RAW))
 
621
    # Verify the self signature in the key
 
622
    crtverify = ctypes.c_uint()
 
623
    (gnutls.library.functions
 
624
     .gnutls_openpgp_crt_verify_self(crt, 0, ctypes.byref(crtverify)))
 
625
    if crtverify.value != 0:
 
626
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
627
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
628
    # New buffer for the fingerprint
 
629
    buf = ctypes.create_string_buffer(20)
 
630
    buf_len = ctypes.c_size_t()
 
631
    # Get the fingerprint from the certificate into the buffer
 
632
    (gnutls.library.functions
 
633
     .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
634
                                         ctypes.byref(buf_len)))
 
635
    # Deinit the certificate
 
636
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
637
    # Convert the buffer to a Python bytestring
 
638
    fpr = ctypes.string_at(buf, buf_len.value)
 
639
    # Convert the bytestring to hexadecimal notation
 
640
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
641
    return hex_fpr
 
642
 
 
643
 
 
644
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
645
    """A TCP request handler class.
 
646
    Instantiated by IPv6_TCPServer for each request to handle it.
1360
647
    Note: This will run in its own forked process."""
1361
648
    
1362
649
    def handle(self):
1363
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1364
 
            logger.info("TCP connection from: %s",
1365
 
                        unicode(self.client_address))
1366
 
            logger.debug("Pipe FD: %d",
1367
 
                         self.server.child_pipe.fileno())
1368
 
            
1369
 
            session = (gnutls.connection
1370
 
                       .ClientSession(self.request,
1371
 
                                      gnutls.connection
1372
 
                                      .X509Credentials()))
1373
 
            
1374
 
            # Note: gnutls.connection.X509Credentials is really a
1375
 
            # generic GnuTLS certificate credentials object so long as
1376
 
            # no X.509 keys are added to it.  Therefore, we can use it
1377
 
            # here despite using OpenPGP certificates.
1378
 
            
1379
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1380
 
            #                      "+AES-256-CBC", "+SHA1",
1381
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1382
 
            #                      "+DHE-DSS"))
1383
 
            # Use a fallback default, since this MUST be set.
1384
 
            priority = self.server.gnutls_priority
1385
 
            if priority is None:
1386
 
                priority = "NORMAL"
1387
 
            (gnutls.library.functions
1388
 
             .gnutls_priority_set_direct(session._c_object,
1389
 
                                         priority, None))
1390
 
            
1391
 
            # Start communication using the Mandos protocol
1392
 
            # Get protocol number
1393
 
            line = self.request.makefile().readline()
1394
 
            logger.debug("Protocol version: %r", line)
1395
 
            try:
1396
 
                if int(line.strip().split()[0]) > 1:
1397
 
                    raise RuntimeError
1398
 
            except (ValueError, IndexError, RuntimeError) as error:
1399
 
                logger.error("Unknown protocol version: %s", error)
1400
 
                return
1401
 
            
1402
 
            # Start GnuTLS connection
1403
 
            try:
1404
 
                session.handshake()
1405
 
            except gnutls.errors.GNUTLSError as error:
1406
 
                logger.warning("Handshake failed: %s", error)
1407
 
                # Do not run session.bye() here: the session is not
1408
 
                # established.  Just abandon the request.
1409
 
                return
1410
 
            logger.debug("Handshake succeeded")
1411
 
            
1412
 
            approval_required = False
1413
 
            try:
1414
 
                try:
1415
 
                    fpr = self.fingerprint(self.peer_certificate
1416
 
                                           (session))
1417
 
                except (TypeError,
1418
 
                        gnutls.errors.GNUTLSError) as error:
1419
 
                    logger.warning("Bad certificate: %s", error)
1420
 
                    return
1421
 
                logger.debug("Fingerprint: %s", fpr)
1422
 
                
1423
 
                try:
1424
 
                    client = ProxyClient(child_pipe, fpr,
1425
 
                                         self.client_address)
1426
 
                except KeyError:
1427
 
                    return
1428
 
                
1429
 
                if client.approval_delay:
1430
 
                    delay = client.approval_delay
1431
 
                    client.approvals_pending += 1
1432
 
                    approval_required = True
1433
 
                
1434
 
                while True:
1435
 
                    if not client.enabled:
1436
 
                        logger.info("Client %s is disabled",
1437
 
                                       client.name)
1438
 
                        if self.server.use_dbus:
1439
 
                            # Emit D-Bus signal
1440
 
                            client.Rejected("Disabled")
1441
 
                        return
1442
 
                    
1443
 
                    if client._approved or not client.approval_delay:
1444
 
                        #We are approved or approval is disabled
1445
 
                        break
1446
 
                    elif client._approved is None:
1447
 
                        logger.info("Client %s needs approval",
1448
 
                                    client.name)
1449
 
                        if self.server.use_dbus:
1450
 
                            # Emit D-Bus signal
1451
 
                            client.NeedApproval(
1452
 
                                client.approval_delay_milliseconds(),
1453
 
                                client.approved_by_default)
1454
 
                    else:
1455
 
                        logger.warning("Client %s was not approved",
1456
 
                                       client.name)
1457
 
                        if self.server.use_dbus:
1458
 
                            # Emit D-Bus signal
1459
 
                            client.Rejected("Denied")
1460
 
                        return
1461
 
                    
1462
 
                    #wait until timeout or approved
1463
 
                    time = datetime.datetime.now()
1464
 
                    client.changedstate.acquire()
1465
 
                    (client.changedstate.wait
1466
 
                     (float(client._timedelta_to_milliseconds(delay)
1467
 
                            / 1000)))
1468
 
                    client.changedstate.release()
1469
 
                    time2 = datetime.datetime.now()
1470
 
                    if (time2 - time) >= delay:
1471
 
                        if not client.approved_by_default:
1472
 
                            logger.warning("Client %s timed out while"
1473
 
                                           " waiting for approval",
1474
 
                                           client.name)
1475
 
                            if self.server.use_dbus:
1476
 
                                # Emit D-Bus signal
1477
 
                                client.Rejected("Approval timed out")
1478
 
                            return
1479
 
                        else:
1480
 
                            break
1481
 
                    else:
1482
 
                        delay -= time2 - time
1483
 
                
1484
 
                sent_size = 0
1485
 
                while sent_size < len(client.secret):
1486
 
                    try:
1487
 
                        sent = session.send(client.secret[sent_size:])
1488
 
                    except gnutls.errors.GNUTLSError as error:
1489
 
                        logger.warning("gnutls send failed")
1490
 
                        return
1491
 
                    logger.debug("Sent: %d, remaining: %d",
1492
 
                                 sent, len(client.secret)
1493
 
                                 - (sent_size + sent))
1494
 
                    sent_size += sent
1495
 
                
1496
 
                logger.info("Sending secret to %s", client.name)
1497
 
                # bump the timeout using extended_timeout
1498
 
                client.checked_ok(client.extended_timeout)
1499
 
                if self.server.use_dbus:
1500
 
                    # Emit D-Bus signal
1501
 
                    client.GotSecret()
1502
 
            
1503
 
            finally:
1504
 
                if approval_required:
1505
 
                    client.approvals_pending -= 1
1506
 
                try:
1507
 
                    session.bye()
1508
 
                except gnutls.errors.GNUTLSError as error:
1509
 
                    logger.warning("GnuTLS bye failed")
1510
 
    
1511
 
    @staticmethod
1512
 
    def peer_certificate(session):
1513
 
        "Return the peer's OpenPGP certificate as a bytestring"
1514
 
        # If not an OpenPGP certificate...
1515
 
        if (gnutls.library.functions
1516
 
            .gnutls_certificate_type_get(session._c_object)
1517
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1518
 
            # ...do the normal thing
1519
 
            return session.peer_certificate
1520
 
        list_size = ctypes.c_uint(1)
1521
 
        cert_list = (gnutls.library.functions
1522
 
                     .gnutls_certificate_get_peers
1523
 
                     (session._c_object, ctypes.byref(list_size)))
1524
 
        if not bool(cert_list) and list_size.value != 0:
1525
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1526
 
                                            " certificate")
1527
 
        if list_size.value == 0:
1528
 
            return None
1529
 
        cert = cert_list[0]
1530
 
        return ctypes.string_at(cert.data, cert.size)
1531
 
    
1532
 
    @staticmethod
1533
 
    def fingerprint(openpgp):
1534
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1535
 
        # New GnuTLS "datum" with the OpenPGP public key
1536
 
        datum = (gnutls.library.types
1537
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1538
 
                                             ctypes.POINTER
1539
 
                                             (ctypes.c_ubyte)),
1540
 
                                 ctypes.c_uint(len(openpgp))))
1541
 
        # New empty GnuTLS certificate
1542
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1543
 
        (gnutls.library.functions
1544
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1545
 
        # Import the OpenPGP public key into the certificate
1546
 
        (gnutls.library.functions
1547
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1548
 
                                    gnutls.library.constants
1549
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1550
 
        # Verify the self signature in the key
1551
 
        crtverify = ctypes.c_uint()
1552
 
        (gnutls.library.functions
1553
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1554
 
                                         ctypes.byref(crtverify)))
1555
 
        if crtverify.value != 0:
1556
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1557
 
            raise (gnutls.errors.CertificateSecurityError
1558
 
                   ("Verify failed"))
1559
 
        # New buffer for the fingerprint
1560
 
        buf = ctypes.create_string_buffer(20)
1561
 
        buf_len = ctypes.c_size_t()
1562
 
        # Get the fingerprint from the certificate into the buffer
1563
 
        (gnutls.library.functions
1564
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1565
 
                                             ctypes.byref(buf_len)))
1566
 
        # Deinit the certificate
1567
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1568
 
        # Convert the buffer to a Python bytestring
1569
 
        fpr = ctypes.string_at(buf, buf_len.value)
1570
 
        # Convert the bytestring to hexadecimal notation
1571
 
        hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1572
 
        return hex_fpr
1573
 
 
1574
 
 
1575
 
class MultiprocessingMixIn(object):
1576
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1577
 
    def sub_process_main(self, request, address):
1578
 
        try:
1579
 
            self.finish_request(request, address)
1580
 
        except:
1581
 
            self.handle_error(request, address)
1582
 
        self.close_request(request)
1583
 
    
1584
 
    def process_request(self, request, address):
1585
 
        """Start a new process to process the request."""
1586
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1587
 
                                       args = (request,
1588
 
                                               address))
1589
 
        proc.start()
1590
 
        return proc
1591
 
 
1592
 
 
1593
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1594
 
    """ adds a pipe to the MixIn """
1595
 
    def process_request(self, request, client_address):
1596
 
        """Overrides and wraps the original process_request().
1597
 
        
1598
 
        This function creates a new pipe in self.pipe
1599
 
        """
1600
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1601
 
        
1602
 
        proc = MultiprocessingMixIn.process_request(self, request,
1603
 
                                                    client_address)
1604
 
        self.child_pipe.close()
1605
 
        self.add_pipe(parent_pipe, proc)
1606
 
    
1607
 
    def add_pipe(self, parent_pipe, proc):
1608
 
        """Dummy function; override as necessary"""
1609
 
        raise NotImplementedError
1610
 
 
1611
 
 
1612
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1613
 
                     socketserver.TCPServer, object):
1614
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1615
 
    
 
650
        logger.info(u"TCP connection from: %s",
 
651
                    unicode(self.client_address))
 
652
        session = (gnutls.connection
 
653
                   .ClientSession(self.request,
 
654
                                  gnutls.connection
 
655
                                  .X509Credentials()))
 
656
        
 
657
        line = self.request.makefile().readline()
 
658
        logger.debug(u"Protocol version: %r", line)
 
659
        try:
 
660
            if int(line.strip().split()[0]) > 1:
 
661
                raise RuntimeError
 
662
        except (ValueError, IndexError, RuntimeError), error:
 
663
            logger.error(u"Unknown protocol version: %s", error)
 
664
            return
 
665
        
 
666
        # Note: gnutls.connection.X509Credentials is really a generic
 
667
        # GnuTLS certificate credentials object so long as no X.509
 
668
        # keys are added to it.  Therefore, we can use it here despite
 
669
        # using OpenPGP certificates.
 
670
        
 
671
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
672
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
673
        #                "+DHE-DSS"))
 
674
        # Use a fallback default, since this MUST be set.
 
675
        priority = self.server.settings.get("priority", "NORMAL")
 
676
        (gnutls.library.functions
 
677
         .gnutls_priority_set_direct(session._c_object,
 
678
                                     priority, None))
 
679
        
 
680
        try:
 
681
            session.handshake()
 
682
        except gnutls.errors.GNUTLSError, error:
 
683
            logger.warning(u"Handshake failed: %s", error)
 
684
            # Do not run session.bye() here: the session is not
 
685
            # established.  Just abandon the request.
 
686
            return
 
687
        try:
 
688
            fpr = fingerprint(peer_certificate(session))
 
689
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
690
            logger.warning(u"Bad certificate: %s", error)
 
691
            session.bye()
 
692
            return
 
693
        logger.debug(u"Fingerprint: %s", fpr)
 
694
        for c in self.server.clients:
 
695
            if c.fingerprint == fpr:
 
696
                client = c
 
697
                break
 
698
        else:
 
699
            logger.warning(u"Client not found for fingerprint: %s",
 
700
                           fpr)
 
701
            session.bye()
 
702
            return
 
703
        # Have to check if client.still_valid(), since it is possible
 
704
        # that the client timed out while establishing the GnuTLS
 
705
        # session.
 
706
        if not client.still_valid():
 
707
            logger.warning(u"Client %(name)s is invalid",
 
708
                           vars(client))
 
709
            session.bye()
 
710
            return
 
711
        ## This won't work here, since we're in a fork.
 
712
        # client.bump_timeout()
 
713
        sent_size = 0
 
714
        while sent_size < len(client.secret):
 
715
            sent = session.send(client.secret[sent_size:])
 
716
            logger.debug(u"Sent: %d, remaining: %d",
 
717
                         sent, len(client.secret)
 
718
                         - (sent_size + sent))
 
719
            sent_size += sent
 
720
        session.bye()
 
721
 
 
722
 
 
723
class IPv6_TCPServer(SocketServer.ForkingMixIn,
 
724
                     SocketServer.TCPServer, object):
 
725
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1616
726
    Attributes:
 
727
        settings:       Server settings
 
728
        clients:        Set() of Client objects
1617
729
        enabled:        Boolean; whether this server is activated yet
1618
 
        interface:      None or a network interface name (string)
1619
 
        use_ipv6:       Boolean; to use IPv6 or not
1620
730
    """
1621
 
    def __init__(self, server_address, RequestHandlerClass,
1622
 
                 interface=None, use_ipv6=True):
1623
 
        self.interface = interface
1624
 
        if use_ipv6:
1625
 
            self.address_family = socket.AF_INET6
1626
 
        socketserver.TCPServer.__init__(self, server_address,
1627
 
                                        RequestHandlerClass)
 
731
    address_family = socket.AF_INET6
 
732
    def __init__(self, *args, **kwargs):
 
733
        if "settings" in kwargs:
 
734
            self.settings = kwargs["settings"]
 
735
            del kwargs["settings"]
 
736
        if "clients" in kwargs:
 
737
            self.clients = kwargs["clients"]
 
738
            del kwargs["clients"]
 
739
        self.enabled = False
 
740
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1628
741
    def server_bind(self):
1629
742
        """This overrides the normal server_bind() function
1630
743
        to bind to an interface if one was specified, and also NOT to
1631
744
        bind to an address or port if they were not specified."""
1632
 
        if self.interface is not None:
1633
 
            if SO_BINDTODEVICE is None:
1634
 
                logger.error("SO_BINDTODEVICE does not exist;"
1635
 
                             " cannot bind to interface %s",
1636
 
                             self.interface)
1637
 
            else:
1638
 
                try:
1639
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1640
 
                                           SO_BINDTODEVICE,
1641
 
                                           str(self.interface
1642
 
                                               + '\0'))
1643
 
                except socket.error as error:
1644
 
                    if error[0] == errno.EPERM:
1645
 
                        logger.error("No permission to"
1646
 
                                     " bind to interface %s",
1647
 
                                     self.interface)
1648
 
                    elif error[0] == errno.ENOPROTOOPT:
1649
 
                        logger.error("SO_BINDTODEVICE not available;"
1650
 
                                     " cannot bind to interface %s",
1651
 
                                     self.interface)
1652
 
                    else:
1653
 
                        raise
 
745
        if self.settings["interface"]:
 
746
            # 25 is from /usr/include/asm-i486/socket.h
 
747
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
748
            try:
 
749
                self.socket.setsockopt(socket.SOL_SOCKET,
 
750
                                       SO_BINDTODEVICE,
 
751
                                       self.settings["interface"])
 
752
            except socket.error, error:
 
753
                if error[0] == errno.EPERM:
 
754
                    logger.error(u"No permission to"
 
755
                                 u" bind to interface %s",
 
756
                                 self.settings["interface"])
 
757
                else:
 
758
                    raise error
1654
759
        # Only bind(2) the socket if we really need to.
1655
760
        if self.server_address[0] or self.server_address[1]:
1656
761
            if not self.server_address[0]:
1657
 
                if self.address_family == socket.AF_INET6:
1658
 
                    any_address = "::" # in6addr_any
1659
 
                else:
1660
 
                    any_address = socket.INADDR_ANY
1661
 
                self.server_address = (any_address,
 
762
                in6addr_any = "::"
 
763
                self.server_address = (in6addr_any,
1662
764
                                       self.server_address[1])
1663
765
            elif not self.server_address[1]:
1664
766
                self.server_address = (self.server_address[0],
1665
767
                                       0)
1666
 
#                 if self.interface:
 
768
#                 if self.settings["interface"]:
1667
769
#                     self.server_address = (self.server_address[0],
1668
770
#                                            0, # port
1669
771
#                                            0, # flowinfo
1670
772
#                                            if_nametoindex
1671
 
#                                            (self.interface))
1672
 
            return socketserver.TCPServer.server_bind(self)
1673
 
 
1674
 
 
1675
 
class MandosServer(IPv6_TCPServer):
1676
 
    """Mandos server.
1677
 
    
1678
 
    Attributes:
1679
 
        clients:        set of Client objects
1680
 
        gnutls_priority GnuTLS priority string
1681
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1682
 
    
1683
 
    Assumes a gobject.MainLoop event loop.
1684
 
    """
1685
 
    def __init__(self, server_address, RequestHandlerClass,
1686
 
                 interface=None, use_ipv6=True, clients=None,
1687
 
                 gnutls_priority=None, use_dbus=True):
1688
 
        self.enabled = False
1689
 
        self.clients = clients
1690
 
        if self.clients is None:
1691
 
            self.clients = {}
1692
 
        self.use_dbus = use_dbus
1693
 
        self.gnutls_priority = gnutls_priority
1694
 
        IPv6_TCPServer.__init__(self, server_address,
1695
 
                                RequestHandlerClass,
1696
 
                                interface = interface,
1697
 
                                use_ipv6 = use_ipv6)
 
773
#                                            (self.settings
 
774
#                                             ["interface"]))
 
775
            return super(IPv6_TCPServer, self).server_bind()
1698
776
    def server_activate(self):
1699
777
        if self.enabled:
1700
 
            return socketserver.TCPServer.server_activate(self)
1701
 
    
 
778
            return super(IPv6_TCPServer, self).server_activate()
1702
779
    def enable(self):
1703
780
        self.enabled = True
1704
 
    
1705
 
    def add_pipe(self, parent_pipe, proc):
1706
 
        # Call "handle_ipc" for both data and EOF events
1707
 
        gobject.io_add_watch(parent_pipe.fileno(),
1708
 
                             gobject.IO_IN | gobject.IO_HUP,
1709
 
                             functools.partial(self.handle_ipc,
1710
 
                                               parent_pipe =
1711
 
                                               parent_pipe,
1712
 
                                               proc = proc))
1713
 
    
1714
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1715
 
                   proc = None, client_object=None):
1716
 
        condition_names = {
1717
 
            gobject.IO_IN: "IN",   # There is data to read.
1718
 
            gobject.IO_OUT: "OUT", # Data can be written (without
1719
 
                                    # blocking).
1720
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
1721
 
            gobject.IO_ERR: "ERR", # Error condition.
1722
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
1723
 
                                    # broken, usually for pipes and
1724
 
                                    # sockets).
1725
 
            }
1726
 
        conditions_string = ' | '.join(name
1727
 
                                       for cond, name in
1728
 
                                       condition_names.iteritems()
1729
 
                                       if cond & condition)
1730
 
        # error, or the other end of multiprocessing.Pipe has closed
1731
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1732
 
            # Wait for other process to exit
1733
 
            proc.join()
1734
 
            return False
1735
 
        
1736
 
        # Read a request from the child
1737
 
        request = parent_pipe.recv()
1738
 
        command = request[0]
1739
 
        
1740
 
        if command == 'init':
1741
 
            fpr = request[1]
1742
 
            address = request[2]
1743
 
            
1744
 
            for c in self.clients.itervalues():
1745
 
                if c.fingerprint == fpr:
1746
 
                    client = c
1747
 
                    break
1748
 
            else:
1749
 
                logger.info("Client not found for fingerprint: %s, ad"
1750
 
                            "dress: %s", fpr, address)
1751
 
                if self.use_dbus:
1752
 
                    # Emit D-Bus signal
1753
 
                    mandos_dbus_service.ClientNotFound(fpr,
1754
 
                                                       address[0])
1755
 
                parent_pipe.send(False)
1756
 
                return False
1757
 
            
1758
 
            gobject.io_add_watch(parent_pipe.fileno(),
1759
 
                                 gobject.IO_IN | gobject.IO_HUP,
1760
 
                                 functools.partial(self.handle_ipc,
1761
 
                                                   parent_pipe =
1762
 
                                                   parent_pipe,
1763
 
                                                   proc = proc,
1764
 
                                                   client_object =
1765
 
                                                   client))
1766
 
            parent_pipe.send(True)
1767
 
            # remove the old hook in favor of the new above hook on
1768
 
            # same fileno
1769
 
            return False
1770
 
        if command == 'funcall':
1771
 
            funcname = request[1]
1772
 
            args = request[2]
1773
 
            kwargs = request[3]
1774
 
            
1775
 
            parent_pipe.send(('data', getattr(client_object,
1776
 
                                              funcname)(*args,
1777
 
                                                         **kwargs)))
1778
 
        
1779
 
        if command == 'getattr':
1780
 
            attrname = request[1]
1781
 
            if callable(client_object.__getattribute__(attrname)):
1782
 
                parent_pipe.send(('function',))
1783
 
            else:
1784
 
                parent_pipe.send(('data', client_object
1785
 
                                  .__getattribute__(attrname)))
1786
 
        
1787
 
        if command == 'setattr':
1788
 
            attrname = request[1]
1789
 
            value = request[2]
1790
 
            setattr(client_object, attrname, value)
1791
 
        
1792
 
        return True
1793
781
 
1794
782
 
1795
783
def string_to_delta(interval):
1796
784
    """Parse a string and return a datetime.timedelta
1797
 
    
 
785
 
1798
786
    >>> string_to_delta('7d')
1799
787
    datetime.timedelta(7)
1800
788
    >>> string_to_delta('60s')
1803
791
    datetime.timedelta(0, 3600)
1804
792
    >>> string_to_delta('24h')
1805
793
    datetime.timedelta(1)
1806
 
    >>> string_to_delta('1w')
 
794
    >>> string_to_delta(u'1w')
1807
795
    datetime.timedelta(7)
1808
796
    >>> string_to_delta('5m 30s')
1809
797
    datetime.timedelta(0, 330)
1813
801
        try:
1814
802
            suffix = unicode(s[-1])
1815
803
            value = int(s[:-1])
1816
 
            if suffix == "d":
 
804
            if suffix == u"d":
1817
805
                delta = datetime.timedelta(value)
1818
 
            elif suffix == "s":
 
806
            elif suffix == u"s":
1819
807
                delta = datetime.timedelta(0, value)
1820
 
            elif suffix == "m":
 
808
            elif suffix == u"m":
1821
809
                delta = datetime.timedelta(0, 0, 0, 0, value)
1822
 
            elif suffix == "h":
 
810
            elif suffix == u"h":
1823
811
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1824
 
            elif suffix == "w":
 
812
            elif suffix == u"w":
1825
813
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1826
814
            else:
1827
 
                raise ValueError("Unknown suffix %r" % suffix)
1828
 
        except (ValueError, IndexError) as e:
1829
 
            raise ValueError(*(e.args))
 
815
                raise ValueError
 
816
        except (ValueError, IndexError):
 
817
            raise ValueError
1830
818
        timevalue += delta
1831
819
    return timevalue
1832
820
 
1833
821
 
 
822
def server_state_changed(state):
 
823
    """Derived from the Avahi example code"""
 
824
    if state == avahi.SERVER_COLLISION:
 
825
        logger.error(u"Zeroconf server name collision")
 
826
        service.remove()
 
827
    elif state == avahi.SERVER_RUNNING:
 
828
        service.add()
 
829
 
 
830
 
 
831
def entry_group_state_changed(state, error):
 
832
    """Derived from the Avahi example code"""
 
833
    logger.debug(u"Avahi state change: %i", state)
 
834
    
 
835
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
836
        logger.debug(u"Zeroconf service established.")
 
837
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
838
        logger.warning(u"Zeroconf service name collision.")
 
839
        service.rename()
 
840
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
841
        logger.critical(u"Avahi: Error in group state changed %s",
 
842
                        unicode(error))
 
843
        raise AvahiGroupError(u"State changed: %s" % unicode(error))
 
844
 
1834
845
def if_nametoindex(interface):
1835
 
    """Call the C function if_nametoindex(), or equivalent
1836
 
    
1837
 
    Note: This function cannot accept a unicode string."""
 
846
    """Call the C function if_nametoindex(), or equivalent"""
1838
847
    global if_nametoindex
1839
848
    try:
1840
849
        if_nametoindex = (ctypes.cdll.LoadLibrary
1841
850
                          (ctypes.util.find_library("c"))
1842
851
                          .if_nametoindex)
1843
852
    except (OSError, AttributeError):
1844
 
        logger.warning("Doing if_nametoindex the hard way")
 
853
        if "struct" not in sys.modules:
 
854
            import struct
 
855
        if "fcntl" not in sys.modules:
 
856
            import fcntl
1845
857
        def if_nametoindex(interface):
1846
858
            "Get an interface index the hard way, i.e. using fcntl()"
1847
859
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1848
 
            with contextlib.closing(socket.socket()) as s:
 
860
            with closing(socket.socket()) as s:
1849
861
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1850
 
                                    struct.pack(str("16s16x"),
1851
 
                                                interface))
1852
 
            interface_index = struct.unpack(str("I"),
1853
 
                                            ifreq[16:20])[0]
 
862
                                    struct.pack("16s16x", interface))
 
863
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1854
864
            return interface_index
1855
865
    return if_nametoindex(interface)
1856
866
 
1857
867
 
1858
868
def daemon(nochdir = False, noclose = False):
1859
869
    """See daemon(3).  Standard BSD Unix function.
1860
 
    
1861
870
    This should really exist as os.daemon, but it doesn't (yet)."""
1862
871
    if os.fork():
1863
872
        sys.exit()
1871
880
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1872
881
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1873
882
            raise OSError(errno.ENODEV,
1874
 
                          "%s not a character device"
1875
 
                          % os.path.devnull)
 
883
                          "/dev/null not a character device")
1876
884
        os.dup2(null, sys.stdin.fileno())
1877
885
        os.dup2(null, sys.stdout.fileno())
1878
886
        os.dup2(null, sys.stderr.fileno())
1881
889
 
1882
890
 
1883
891
def main():
1884
 
    
1885
 
    ##################################################################
1886
 
    # Parsing of options, both command line and config file
1887
 
    
1888
 
    parser = argparse.ArgumentParser()
1889
 
    parser.add_argument("-v", "--version", action="version",
1890
 
                        version = "%%(prog)s %s" % version,
1891
 
                        help="show version number and exit")
1892
 
    parser.add_argument("-i", "--interface", metavar="IF",
1893
 
                        help="Bind to interface IF")
1894
 
    parser.add_argument("-a", "--address",
1895
 
                        help="Address to listen for requests on")
1896
 
    parser.add_argument("-p", "--port", type=int,
1897
 
                        help="Port number to receive requests on")
1898
 
    parser.add_argument("--check", action="store_true",
1899
 
                        help="Run self-test")
1900
 
    parser.add_argument("--debug", action="store_true",
1901
 
                        help="Debug mode; run in foreground and log"
1902
 
                        " to terminal")
1903
 
    parser.add_argument("--debuglevel", metavar="LEVEL",
1904
 
                        help="Debug level for stdout output")
1905
 
    parser.add_argument("--priority", help="GnuTLS"
1906
 
                        " priority string (see GnuTLS documentation)")
1907
 
    parser.add_argument("--servicename",
1908
 
                        metavar="NAME", help="Zeroconf service name")
1909
 
    parser.add_argument("--configdir",
1910
 
                        default="/etc/mandos", metavar="DIR",
1911
 
                        help="Directory to search for configuration"
1912
 
                        " files")
1913
 
    parser.add_argument("--no-dbus", action="store_false",
1914
 
                        dest="use_dbus", help="Do not provide D-Bus"
1915
 
                        " system bus interface")
1916
 
    parser.add_argument("--no-ipv6", action="store_false",
1917
 
                        dest="use_ipv6", help="Do not use IPv6")
1918
 
    parser.add_argument("--no-restore", action="store_false",
1919
 
                        dest="restore", help="Do not restore old state",
1920
 
                        default=True)
1921
 
 
1922
 
    options = parser.parse_args()
 
892
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
893
    parser.add_option("-i", "--interface", type="string",
 
894
                      metavar="IF", help="Bind to interface IF")
 
895
    parser.add_option("-a", "--address", type="string",
 
896
                      help="Address to listen for requests on")
 
897
    parser.add_option("-p", "--port", type="int",
 
898
                      help="Port number to receive requests on")
 
899
    parser.add_option("--check", action="store_true",
 
900
                      help="Run self-test")
 
901
    parser.add_option("--debug", action="store_true",
 
902
                      help="Debug mode; run in foreground and log to"
 
903
                      " terminal")
 
904
    parser.add_option("--priority", type="string", help="GnuTLS"
 
905
                      " priority string (see GnuTLS documentation)")
 
906
    parser.add_option("--servicename", type="string", metavar="NAME",
 
907
                      help="Zeroconf service name")
 
908
    parser.add_option("--configdir", type="string",
 
909
                      default="/etc/mandos", metavar="DIR",
 
910
                      help="Directory to search for configuration"
 
911
                      " files")
 
912
    parser.add_option("--no-dbus", action="store_false",
 
913
                      dest="use_dbus",
 
914
                      help="Do not provide D-Bus system bus"
 
915
                      " interface")
 
916
    options = parser.parse_args()[0]
1923
917
    
1924
918
    if options.check:
1925
919
        import doctest
1935
929
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1936
930
                        "servicename": "Mandos",
1937
931
                        "use_dbus": "True",
1938
 
                        "use_ipv6": "True",
1939
 
                        "debuglevel": "",
1940
932
                        }
1941
933
    
1942
934
    # Parse config file for server-global settings
1943
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
935
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1944
936
    del server_defaults
1945
 
    server_config.read(os.path.join(options.configdir,
1946
 
                                    "mandos.conf"))
 
937
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1947
938
    # Convert the SafeConfigParser object to a dict
1948
939
    server_settings = server_config.defaults()
1949
 
    # Use the appropriate methods on the non-string config options
1950
 
    for option in ("debug", "use_dbus", "use_ipv6"):
1951
 
        server_settings[option] = server_config.getboolean("DEFAULT",
1952
 
                                                           option)
1953
 
    if server_settings["port"]:
1954
 
        server_settings["port"] = server_config.getint("DEFAULT",
1955
 
                                                       "port")
 
940
    # Use getboolean on the boolean config options
 
941
    server_settings["debug"] = (server_config.getboolean
 
942
                                ("DEFAULT", "debug"))
 
943
    server_settings["use_dbus"] = (server_config.getboolean
 
944
                                   ("DEFAULT", "use_dbus"))
1956
945
    del server_config
1957
946
    
1958
947
    # Override the settings from the config file with command line
1959
948
    # options, if set.
1960
949
    for option in ("interface", "address", "port", "debug",
1961
950
                   "priority", "servicename", "configdir",
1962
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore"):
 
951
                   "use_dbus"):
1963
952
        value = getattr(options, option)
1964
953
        if value is not None:
1965
954
            server_settings[option] = value
1966
955
    del options
1967
 
    # Force all strings to be unicode
1968
 
    for option in server_settings.keys():
1969
 
        if type(server_settings[option]) is str:
1970
 
            server_settings[option] = unicode(server_settings[option])
1971
956
    # Now we have our good server settings in "server_settings"
1972
957
    
1973
 
    ##################################################################
1974
 
    
1975
958
    # For convenience
1976
959
    debug = server_settings["debug"]
1977
 
    debuglevel = server_settings["debuglevel"]
1978
960
    use_dbus = server_settings["use_dbus"]
1979
 
    use_ipv6 = server_settings["use_ipv6"]
 
961
    
 
962
    if not debug:
 
963
        syslogger.setLevel(logging.WARNING)
 
964
        console.setLevel(logging.WARNING)
1980
965
    
1981
966
    if server_settings["servicename"] != "Mandos":
1982
967
        syslogger.setFormatter(logging.Formatter
1983
 
                               ('Mandos (%s) [%%(process)d]:'
1984
 
                                ' %%(levelname)s: %%(message)s'
 
968
                               ('Mandos (%s): %%(levelname)s:'
 
969
                                ' %%(message)s'
1985
970
                                % server_settings["servicename"]))
1986
971
    
1987
972
    # Parse config file with clients
1988
 
    client_defaults = { "timeout": "5m",
1989
 
                        "extended_timeout": "15m",
1990
 
                        "interval": "2m",
 
973
    client_defaults = { "timeout": "1h",
 
974
                        "interval": "5m",
1991
975
                        "checker": "fping -q -- %%(host)s",
1992
976
                        "host": "",
1993
 
                        "approval_delay": "0s",
1994
 
                        "approval_duration": "1s",
1995
977
                        }
1996
 
    client_config = configparser.SafeConfigParser(client_defaults)
 
978
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1997
979
    client_config.read(os.path.join(server_settings["configdir"],
1998
980
                                    "clients.conf"))
1999
981
    
2000
 
    global mandos_dbus_service
2001
 
    mandos_dbus_service = None
2002
 
    
2003
 
    tcp_server = MandosServer((server_settings["address"],
2004
 
                               server_settings["port"]),
2005
 
                              ClientHandler,
2006
 
                              interface=(server_settings["interface"]
2007
 
                                         or None),
2008
 
                              use_ipv6=use_ipv6,
2009
 
                              gnutls_priority=
2010
 
                              server_settings["priority"],
2011
 
                              use_dbus=use_dbus)
2012
 
    if not debug:
2013
 
        pidfilename = "/var/run/mandos.pid"
2014
 
        try:
2015
 
            pidfile = open(pidfilename, "w")
2016
 
        except IOError:
2017
 
            logger.error("Could not open file %r", pidfilename)
 
982
    clients = Set()
 
983
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
984
                                 server_settings["port"]),
 
985
                                TCP_handler,
 
986
                                settings=server_settings,
 
987
                                clients=clients)
 
988
    pidfilename = "/var/run/mandos.pid"
 
989
    try:
 
990
        pidfile = open(pidfilename, "w")
 
991
    except IOError, error:
 
992
        logger.error("Could not open file %r", pidfilename)
2018
993
    
2019
994
    try:
2020
995
        uid = pwd.getpwnam("_mandos").pw_uid
2026
1001
        except KeyError:
2027
1002
            try:
2028
1003
                uid = pwd.getpwnam("nobody").pw_uid
2029
 
                gid = pwd.getpwnam("nobody").pw_gid
 
1004
                gid = pwd.getpwnam("nogroup").pw_gid
2030
1005
            except KeyError:
2031
1006
                uid = 65534
2032
1007
                gid = 65534
2033
1008
    try:
 
1009
        os.setuid(uid)
2034
1010
        os.setgid(gid)
2035
 
        os.setuid(uid)
2036
 
    except OSError as error:
 
1011
    except OSError, error:
2037
1012
        if error[0] != errno.EPERM:
2038
1013
            raise error
2039
1014
    
2040
 
    if not debug and not debuglevel:
2041
 
        syslogger.setLevel(logging.WARNING)
2042
 
        console.setLevel(logging.WARNING)
2043
 
    if debuglevel:
2044
 
        level = getattr(logging, debuglevel.upper())
2045
 
        syslogger.setLevel(level)
2046
 
        console.setLevel(level)
 
1015
    global service
 
1016
    service = AvahiService(name = server_settings["servicename"],
 
1017
                           servicetype = "_mandos._tcp", )
 
1018
    if server_settings["interface"]:
 
1019
        service.interface = (if_nametoindex
 
1020
                             (server_settings["interface"]))
 
1021
    
 
1022
    global main_loop
 
1023
    global bus
 
1024
    global server
 
1025
    # From the Avahi example code
 
1026
    DBusGMainLoop(set_as_default=True )
 
1027
    main_loop = gobject.MainLoop()
 
1028
    bus = dbus.SystemBus()
 
1029
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
1030
                                           avahi.DBUS_PATH_SERVER),
 
1031
                            avahi.DBUS_INTERFACE_SERVER)
 
1032
    # End of Avahi example code
 
1033
    if use_dbus:
 
1034
        bus_name = dbus.service.BusName(u"org.mandos-system.Mandos",
 
1035
                                        bus)
 
1036
    
 
1037
    clients.update(Set(Client(name = section,
 
1038
                              config
 
1039
                              = dict(client_config.items(section)),
 
1040
                              use_dbus = use_dbus)
 
1041
                       for section in client_config.sections()))
 
1042
    if not clients:
 
1043
        logger.warning(u"No clients defined")
2047
1044
    
2048
1045
    if debug:
2049
 
        # Enable all possible GnuTLS debugging
2050
 
        
2051
 
        # "Use a log level over 10 to enable all debugging options."
2052
 
        # - GnuTLS manual
2053
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2054
 
        
2055
 
        @gnutls.library.types.gnutls_log_func
2056
 
        def debug_gnutls(level, string):
2057
 
            logger.debug("GnuTLS: %s", string[:-1])
2058
 
        
2059
 
        (gnutls.library.functions
2060
 
         .gnutls_global_set_log_function(debug_gnutls))
2061
 
        
2062
1046
        # Redirect stdin so all checkers get /dev/null
2063
1047
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
2064
1048
        os.dup2(null, sys.stdin.fileno())
2067
1051
    else:
2068
1052
        # No console logging
2069
1053
        logger.removeHandler(console)
2070
 
    
2071
 
    # Need to fork before connecting to D-Bus
2072
 
    if not debug:
2073
1054
        # Close all input and output, do double fork, etc.
2074
1055
        daemon()
2075
1056
    
2076
 
    global main_loop
2077
 
    # From the Avahi example code
2078
 
    DBusGMainLoop(set_as_default=True )
2079
 
    main_loop = gobject.MainLoop()
2080
 
    bus = dbus.SystemBus()
2081
 
    # End of Avahi example code
2082
 
    if use_dbus:
2083
 
        try:
2084
 
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2085
 
                                            bus, do_not_queue=True)
2086
 
            old_bus_name = (dbus.service.BusName
2087
 
                            ("se.bsnet.fukt.Mandos", bus,
2088
 
                             do_not_queue=True))
2089
 
        except dbus.exceptions.NameExistsException as e:
2090
 
            logger.error(unicode(e) + ", disabling D-Bus")
2091
 
            use_dbus = False
2092
 
            server_settings["use_dbus"] = False
2093
 
            tcp_server.use_dbus = False
2094
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2095
 
    service = AvahiService(name = server_settings["servicename"],
2096
 
                           servicetype = "_mandos._tcp",
2097
 
                           protocol = protocol, bus = bus)
2098
 
    if server_settings["interface"]:
2099
 
        service.interface = (if_nametoindex
2100
 
                             (str(server_settings["interface"])))
2101
 
    
2102
 
    global multiprocessing_manager
2103
 
    multiprocessing_manager = multiprocessing.Manager()
2104
 
    
2105
 
    client_class = Client
2106
 
    if use_dbus:
2107
 
        client_class = functools.partial(ClientDBusTransitional,
2108
 
                                         bus = bus)
2109
 
    
2110
 
    special_settings = {
2111
 
        # Some settings need to be accessd by special methods;
2112
 
        # booleans need .getboolean(), etc.  Here is a list of them:
2113
 
        "approved_by_default":
2114
 
            lambda section:
2115
 
            client_config.getboolean(section, "approved_by_default"),
2116
 
        }
2117
 
    # Construct a new dict of client settings of this form:
2118
 
    # { client_name: {setting_name: value, ...}, ...}
2119
 
    # with exceptions for any special settings as defined above
2120
 
    client_settings = dict((clientname,
2121
 
                           dict((setting,
2122
 
                                 (value if setting not in special_settings
2123
 
                                  else special_settings[setting](clientname)))
2124
 
                                for setting, value in client_config.items(clientname)))
2125
 
                          for clientname in client_config.sections())
2126
 
    
2127
 
    old_client_settings = {}
2128
 
    clients_data = []
2129
 
 
2130
 
    if server_settings["restore"]:
2131
 
        try:
2132
 
            with open(stored_state_path, "rb") as stored_state:
2133
 
                clients_data, old_client_settings = pickle.load(stored_state)
2134
 
            os.remove(stored_state_path)
2135
 
        except IOError as e:
2136
 
            logger.warning("Could not load persistant state: {0}".format(e))
2137
 
            if e.errno != errno.ENOENT:
2138
 
                raise
2139
 
 
2140
 
    for client in clients_data:
2141
 
        client_name = client["name"]
2142
 
        
2143
 
        # Decide which value to use after restoring saved state.
2144
 
        # We have three different values: Old config file,
2145
 
        # new config file, and saved state.
2146
 
        # New config value takes precedence if it differs from old
2147
 
        # config value, otherwise use saved state.
2148
 
        for name, value in client_settings[client_name].items():
2149
 
            try:
2150
 
                # For each value in new config, check if it differs
2151
 
                # from the old config value (Except for the "secret"
2152
 
                # attribute)
2153
 
                if name != "secret" and value != old_client_settings[client_name][name]:
2154
 
                    setattr(client, name, value)
2155
 
            except KeyError:
2156
 
                pass
2157
 
 
2158
 
        # Clients who has passed its expire date, can still be enabled if its
2159
 
        # last checker was sucessful. Clients who checkers failed before we
2160
 
        # stored it state is asumed to had failed checker during downtime.
2161
 
        if client["enabled"] and client["last_checked_ok"]:
2162
 
            if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2163
 
                > client["interval"]):
2164
 
                if client["last_checker_status"] != 0:
2165
 
                    client["enabled"] = False
2166
 
                else:
2167
 
                    client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2168
 
 
2169
 
        client["changedstate"] = (multiprocessing_manager
2170
 
                                  .Condition(multiprocessing_manager
2171
 
                                             .Lock()))
2172
 
        if use_dbus:
2173
 
            new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2174
 
            tcp_server.clients[client_name] = new_client
2175
 
            new_client.bus = bus
2176
 
            for name, value in client.iteritems():
2177
 
                setattr(new_client, name, value)
2178
 
            client_object_name = unicode(client_name).translate(
2179
 
                {ord("."): ord("_"),
2180
 
                 ord("-"): ord("_")})
2181
 
            new_client.dbus_object_path = (dbus.ObjectPath
2182
 
                                     ("/clients/" + client_object_name))
2183
 
            DBusObjectWithProperties.__init__(new_client,
2184
 
                                              new_client.bus,
2185
 
                                              new_client.dbus_object_path)
2186
 
        else:
2187
 
            tcp_server.clients[client_name] = Client.__new__(Client)
2188
 
            for name, value in client.iteritems():
2189
 
                setattr(tcp_server.clients[client_name], name, value)
2190
 
                
2191
 
        tcp_server.clients[client_name].decrypt_secret(
2192
 
            client_settings[client_name]["secret"])            
2193
 
        
2194
 
    # Create/remove clients based on new changes made to config
2195
 
    for clientname in set(old_client_settings) - set(client_settings):
2196
 
        del tcp_server.clients[clientname]
2197
 
    for clientname in set(client_settings) - set(old_client_settings):
2198
 
        tcp_server.clients[clientname] = (client_class(name = clientname,
2199
 
                                                       config =
2200
 
                                                       client_settings
2201
 
                                                       [clientname]))
2202
 
    
2203
 
 
2204
 
    if not tcp_server.clients:
2205
 
        logger.warning("No clients defined")
2206
 
        
 
1057
    try:
 
1058
        pid = os.getpid()
 
1059
        pidfile.write(str(pid) + "\n")
 
1060
        pidfile.close()
 
1061
        del pidfile
 
1062
    except IOError:
 
1063
        logger.error(u"Could not write to file %r with PID %d",
 
1064
                     pidfilename, pid)
 
1065
    except NameError:
 
1066
        # "pidfile" was never created
 
1067
        pass
 
1068
    del pidfilename
 
1069
    
 
1070
    def cleanup():
 
1071
        "Cleanup function; run on exit"
 
1072
        global group
 
1073
        # From the Avahi example code
 
1074
        if not group is None:
 
1075
            group.Free()
 
1076
            group = None
 
1077
        # End of Avahi example code
 
1078
        
 
1079
        while clients:
 
1080
            client = clients.pop()
 
1081
            client.disable_hook = None
 
1082
            client.disable()
 
1083
    
 
1084
    atexit.register(cleanup)
 
1085
    
2207
1086
    if not debug:
2208
 
        try:
2209
 
            with pidfile:
2210
 
                pid = os.getpid()
2211
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
2212
 
            del pidfile
2213
 
        except IOError:
2214
 
            logger.error("Could not write to file %r with PID %d",
2215
 
                         pidfilename, pid)
2216
 
        except NameError:
2217
 
            # "pidfile" was never created
2218
 
            pass
2219
 
        del pidfilename
2220
 
        
2221
1087
        signal.signal(signal.SIGINT, signal.SIG_IGN)
2222
 
    
2223
1088
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2224
1089
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2225
1090
    
2226
1091
    if use_dbus:
2227
 
        class MandosDBusService(dbus.service.Object):
 
1092
        class MandosServer(dbus.service.Object):
2228
1093
            """A D-Bus proxy object"""
2229
1094
            def __init__(self):
2230
 
                dbus.service.Object.__init__(self, bus, "/")
2231
 
            _interface = "se.recompile.Mandos"
2232
 
            
 
1095
                dbus.service.Object.__init__(self, bus,
 
1096
                                             "/Mandos")
 
1097
            _interface = u"org.mandos_system.Mandos"
 
1098
 
 
1099
            @dbus.service.signal(_interface, signature="oa{sv}")
 
1100
            def ClientAdded(self, objpath, properties):
 
1101
                "D-Bus signal"
 
1102
                pass
 
1103
 
2233
1104
            @dbus.service.signal(_interface, signature="o")
2234
 
            def ClientAdded(self, objpath):
2235
 
                "D-Bus signal"
2236
 
                pass
2237
 
            
2238
 
            @dbus.service.signal(_interface, signature="ss")
2239
 
            def ClientNotFound(self, fingerprint, address):
2240
 
                "D-Bus signal"
2241
 
                pass
2242
 
            
2243
 
            @dbus.service.signal(_interface, signature="os")
2244
 
            def ClientRemoved(self, objpath, name):
2245
 
                "D-Bus signal"
2246
 
                pass
2247
 
            
 
1105
            def ClientRemoved(self, objpath):
 
1106
                "D-Bus signal"
 
1107
                pass
 
1108
 
2248
1109
            @dbus.service.method(_interface, out_signature="ao")
2249
1110
            def GetAllClients(self):
2250
 
                "D-Bus method"
2251
 
                return dbus.Array(c.dbus_object_path
2252
 
                                  for c in
2253
 
                                  tcp_server.clients.itervalues())
2254
 
            
2255
 
            @dbus.service.method(_interface,
2256
 
                                 out_signature="a{oa{sv}}")
 
1111
                return dbus.Array(c.dbus_object_path for c in clients)
 
1112
 
 
1113
            @dbus.service.method(_interface, out_signature="a{oa{sv}}")
2257
1114
            def GetAllClientsWithProperties(self):
2258
 
                "D-Bus method"
2259
1115
                return dbus.Dictionary(
2260
 
                    ((c.dbus_object_path, c.GetAll(""))
2261
 
                     for c in tcp_server.clients.itervalues()),
 
1116
                    ((c.dbus_object_path, c.GetAllProperties())
 
1117
                     for c in clients),
2262
1118
                    signature="oa{sv}")
2263
 
            
 
1119
 
2264
1120
            @dbus.service.method(_interface, in_signature="o")
2265
1121
            def RemoveClient(self, object_path):
2266
 
                "D-Bus method"
2267
 
                for c in tcp_server.clients.itervalues():
 
1122
                for c in clients:
2268
1123
                    if c.dbus_object_path == object_path:
2269
 
                        del tcp_server.clients[c.name]
2270
 
                        c.remove_from_connection()
 
1124
                        clients.remove(c)
2271
1125
                        # Don't signal anything except ClientRemoved
2272
 
                        c.disable(quiet=True)
 
1126
                        c.use_dbus = False
 
1127
                        c.disable()
2273
1128
                        # Emit D-Bus signal
2274
 
                        self.ClientRemoved(object_path, c.name)
 
1129
                        self.ClientRemoved(object_path)
2275
1130
                        return
2276
 
                raise KeyError(object_path)
2277
 
            
 
1131
                raise KeyError
 
1132
            @dbus.service.method(_interface)
 
1133
            def Quit(self):
 
1134
                main_loop.quit()
 
1135
 
2278
1136
            del _interface
2279
 
        
2280
 
        class MandosDBusServiceTransitional(MandosDBusService):
2281
 
            __metaclass__ = AlternateDBusNamesMetaclass
2282
 
        mandos_dbus_service = MandosDBusServiceTransitional()
2283
 
    
2284
 
    def cleanup():
2285
 
        "Cleanup function; run on exit"
2286
 
        service.cleanup()
2287
 
        
2288
 
        multiprocessing.active_children()
2289
 
        if not (tcp_server.clients or client_settings):
2290
 
            return
2291
 
 
2292
 
        # Store client before exiting. Secrets are encrypted with key based
2293
 
        # on what config file has. If config file is removed/edited, old
2294
 
        # secret will thus be unrecovable.
2295
 
        clients = []
2296
 
        for client in tcp_server.clients.itervalues():
2297
 
            client.encrypt_secret(client_settings[client.name]["secret"])
2298
 
 
2299
 
            client_dict = {}
2300
 
 
2301
 
            # A list of attributes that will not be stored when shuting down.
2302
 
            exclude = set(("bus", "changedstate", "secret"))            
2303
 
            for name, typ in inspect.getmembers(dbus.service.Object):
2304
 
                exclude.add(name)
2305
 
                
2306
 
            client_dict["encrypted_secret"] = client.encrypted_secret
2307
 
            for attr in client.client_structure:
2308
 
                if attr not in exclude:
2309
 
                    client_dict[attr] = getattr(client, attr)
2310
 
 
2311
 
            clients.append(client_dict) 
2312
 
            del client_settings[client.name]["secret"]
2313
 
            
2314
 
        try:
2315
 
            with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2316
 
                pickle.dump((clients, client_settings), stored_state)
2317
 
        except IOError as e:
2318
 
            logger.warning("Could not save persistant state: {0}".format(e))
2319
 
            if e.errno != errno.ENOENT:
2320
 
                raise
2321
 
 
2322
 
        # Delete all clients, and settings from config
2323
 
        while tcp_server.clients:
2324
 
            name, client = tcp_server.clients.popitem()
2325
 
            if use_dbus:
2326
 
                client.remove_from_connection()
2327
 
            # Don't signal anything except ClientRemoved
2328
 
            client.disable(quiet=True)
2329
 
            if use_dbus:
2330
 
                # Emit D-Bus signal
2331
 
                mandos_dbus_service.ClientRemoved(client
2332
 
                                              .dbus_object_path,
2333
 
                                              client.name)
2334
 
        client_settings.clear()
2335
 
    
2336
 
    atexit.register(cleanup)
2337
 
    
2338
 
    for client in tcp_server.clients.itervalues():
 
1137
    
 
1138
        mandos_server = MandosServer()
 
1139
    
 
1140
    for client in clients:
2339
1141
        if use_dbus:
2340
1142
            # Emit D-Bus signal
2341
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2342
 
        # Need to initiate checking of clients
2343
 
        if client.enabled:
2344
 
            client.init_checker()
2345
 
 
 
1143
            mandos_server.ClientAdded(client.dbus_object_path,
 
1144
                                      client.GetAllProperties())
 
1145
        client.enable()
2346
1146
    
2347
1147
    tcp_server.enable()
2348
1148
    tcp_server.server_activate()
2349
1149
    
2350
1150
    # Find out what port we got
2351
1151
    service.port = tcp_server.socket.getsockname()[1]
2352
 
    if use_ipv6:
2353
 
        logger.info("Now listening on address %r, port %d,"
2354
 
                    " flowinfo %d, scope_id %d"
2355
 
                    % tcp_server.socket.getsockname())
2356
 
    else:                       # IPv4
2357
 
        logger.info("Now listening on address %r, port %d"
2358
 
                    % tcp_server.socket.getsockname())
 
1152
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
1153
                u" scope_id %d" % tcp_server.socket.getsockname())
2359
1154
    
2360
1155
    #service.interface = tcp_server.socket.getsockname()[3]
2361
1156
    
2362
1157
    try:
2363
1158
        # From the Avahi example code
 
1159
        server.connect_to_signal("StateChanged", server_state_changed)
2364
1160
        try:
2365
 
            service.activate()
2366
 
        except dbus.exceptions.DBusException as error:
2367
 
            logger.critical("DBusException: %s", error)
2368
 
            cleanup()
 
1161
            server_state_changed(server.GetState())
 
1162
        except dbus.exceptions.DBusException, error:
 
1163
            logger.critical(u"DBusException: %s", error)
2369
1164
            sys.exit(1)
2370
1165
        # End of Avahi example code
2371
1166
        
2374
1169
                             (tcp_server.handle_request
2375
1170
                              (*args[2:], **kwargs) or True))
2376
1171
        
2377
 
        logger.debug("Starting main loop")
 
1172
        logger.debug(u"Starting main loop")
2378
1173
        main_loop.run()
2379
 
    except AvahiError as error:
2380
 
        logger.critical("AvahiError: %s", error)
2381
 
        cleanup()
 
1174
    except AvahiError, error:
 
1175
        logger.critical(u"AvahiError: %s", error)
2382
1176
        sys.exit(1)
2383
1177
    except KeyboardInterrupt:
2384
1178
        if debug:
2385
 
            print("", file=sys.stderr)
2386
 
        logger.debug("Server received KeyboardInterrupt")
2387
 
    logger.debug("Server exiting")
2388
 
    # Must run before the D-Bus bus name gets deregistered
2389
 
    cleanup()
2390
 
 
 
1179
            print
2391
1180
 
2392
1181
if __name__ == '__main__':
2393
1182
    main()