/mandos/trunk

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

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

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

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

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

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Lines of Context:
6
6
# This program is partly derived from an example program for an Avahi
7
7
# service publisher, downloaded from
8
8
# <http://avahi.org/wiki/PythonPublishExample>.  This includes the
9
 
# methods "add", "remove", "server_state_changed",
10
 
# "entry_group_state_changed", "cleanup", and "activate" in the
11
 
# "AvahiService" class, and some lines in "main".
 
9
# methods "add" and "remove" in the "AvahiService" class, the
 
10
# "server_state_changed" and "entry_group_state_changed" functions,
 
11
# and some lines in "main".
12
12
13
13
# Everything else is
14
 
# Copyright © 2008-2011 Teddy Hogeborn
15
 
# Copyright © 2008-2011 Björn Påhlsson
 
14
# Copyright © 2008 Teddy Hogeborn & Björn Påhlsson
16
15
17
16
# This program is free software: you can redistribute it and/or modify
18
17
# it under the terms of the GNU General Public License as published by
31
30
# Contact the authors at <mandos@fukt.bsnet.se>.
32
31
33
32
 
34
 
from __future__ import (division, absolute_import, print_function,
35
 
                        unicode_literals)
 
33
from __future__ import division
36
34
 
37
 
import SocketServer as socketserver
 
35
import SocketServer
38
36
import socket
39
 
import optparse
 
37
from optparse import OptionParser
40
38
import datetime
41
39
import errno
42
40
import gnutls.crypto
45
43
import gnutls.library.functions
46
44
import gnutls.library.constants
47
45
import gnutls.library.types
48
 
import ConfigParser as configparser
 
46
import ConfigParser
49
47
import sys
50
48
import re
51
49
import os
52
50
import signal
 
51
from sets import Set
53
52
import subprocess
54
53
import atexit
55
54
import stat
56
55
import logging
57
56
import logging.handlers
58
57
import pwd
59
 
import contextlib
60
 
import struct
61
 
import fcntl
62
 
import functools
63
 
import cPickle as pickle
64
 
import multiprocessing
65
58
 
66
59
import dbus
67
 
import dbus.service
68
60
import gobject
69
61
import avahi
70
62
from dbus.mainloop.glib import DBusGMainLoop
71
63
import ctypes
72
64
import ctypes.util
73
 
import xml.dom.minidom
74
 
import inspect
75
 
 
76
 
try:
77
 
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
 
except AttributeError:
79
 
    try:
80
 
        from IN import SO_BINDTODEVICE
81
 
    except ImportError:
82
 
        SO_BINDTODEVICE = None
83
 
 
84
 
 
85
 
version = "1.2.3"
86
 
 
87
 
#logger = logging.getLogger('mandos')
 
65
 
 
66
version = "1.0"
 
67
 
88
68
logger = logging.Logger('mandos')
89
 
syslogger = (logging.handlers.SysLogHandler
90
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
 
              address = str("/dev/log")))
92
 
syslogger.setFormatter(logging.Formatter
93
 
                       ('Mandos [%(process)d]: %(levelname)s:'
94
 
                        ' %(message)s'))
 
69
syslogger = logging.handlers.SysLogHandler\
 
70
            (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
71
             address = "/dev/log")
 
72
syslogger.setFormatter(logging.Formatter\
 
73
                        ('Mandos: %(levelname)s: %(message)s'))
95
74
logger.addHandler(syslogger)
96
75
 
97
76
console = logging.StreamHandler()
98
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
 
                                       ' %(levelname)s:'
 
77
console.setFormatter(logging.Formatter('%(name)s: %(levelname)s:'
100
78
                                       ' %(message)s'))
101
79
logger.addHandler(console)
102
80
 
103
81
class AvahiError(Exception):
104
 
    def __init__(self, value, *args, **kwargs):
 
82
    def __init__(self, value):
105
83
        self.value = value
106
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
107
 
    def __unicode__(self):
108
 
        return unicode(repr(self.value))
 
84
        super(AvahiError, self).__init__()
 
85
    def __str__(self):
 
86
        return repr(self.value)
109
87
 
110
88
class AvahiServiceError(AvahiError):
111
89
    pass
116
94
 
117
95
class AvahiService(object):
118
96
    """An Avahi (Zeroconf) service.
119
 
    
120
97
    Attributes:
121
98
    interface: integer; avahi.IF_UNSPEC or an interface index.
122
99
               Used to optionally bind to the specified interface.
130
107
    max_renames: integer; maximum number of renames
131
108
    rename_count: integer; counter so we only rename after collisions
132
109
                  a sensible number of times
133
 
    group: D-Bus Entry Group
134
 
    server: D-Bus Server
135
 
    bus: dbus.SystemBus()
136
110
    """
137
111
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
 
                 servicetype = None, port = None, TXT = None,
139
 
                 domain = "", host = "", max_renames = 32768,
140
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
112
                 servicetype = None, port = None, TXT = None, domain = "",
 
113
                 host = "", max_renames = 32768):
141
114
        self.interface = interface
142
115
        self.name = name
143
116
        self.type = servicetype
144
117
        self.port = port
145
 
        self.TXT = TXT if TXT is not None else []
 
118
        if TXT is None:
 
119
            self.TXT = []
 
120
        else:
 
121
            self.TXT = TXT
146
122
        self.domain = domain
147
123
        self.host = host
148
124
        self.rename_count = 0
149
125
        self.max_renames = max_renames
150
 
        self.protocol = protocol
151
 
        self.group = None       # our entry group
152
 
        self.server = None
153
 
        self.bus = bus
154
126
    def rename(self):
155
127
        """Derived from the Avahi example code"""
156
128
        if self.rename_count >= self.max_renames:
157
 
            logger.critical("No suitable Zeroconf service name found"
158
 
                            " after %i retries, exiting.",
 
129
            logger.critical(u"No suitable Zeroconf service name found"
 
130
                            u" after %i retries, exiting.",
159
131
                            self.rename_count)
160
132
            raise AvahiServiceError("Too many renames")
161
 
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
162
 
        logger.info("Changing Zeroconf service name to %r ...",
163
 
                    self.name)
164
 
        syslogger.setFormatter(logging.Formatter
165
 
                               ('Mandos (%s) [%%(process)d]:'
166
 
                                ' %%(levelname)s: %%(message)s'
167
 
                                % self.name))
 
133
        self.name = server.GetAlternativeServiceName(self.name)
 
134
        logger.info(u"Changing Zeroconf service name to %r ...",
 
135
                    str(self.name))
 
136
        syslogger.setFormatter(logging.Formatter\
 
137
                               ('Mandos (%s): %%(levelname)s:'
 
138
                               ' %%(message)s' % self.name))
168
139
        self.remove()
169
 
        try:
170
 
            self.add()
171
 
        except dbus.exceptions.DBusException, error:
172
 
            logger.critical("DBusException: %s", error)
173
 
            self.cleanup()
174
 
            os._exit(1)
 
140
        self.add()
175
141
        self.rename_count += 1
176
142
    def remove(self):
177
143
        """Derived from the Avahi example code"""
178
 
        if self.group is not None:
179
 
            self.group.Reset()
 
144
        if group is not None:
 
145
            group.Reset()
180
146
    def add(self):
181
147
        """Derived from the Avahi example code"""
182
 
        if self.group is None:
183
 
            self.group = dbus.Interface(
184
 
                self.bus.get_object(avahi.DBUS_NAME,
185
 
                                    self.server.EntryGroupNew()),
186
 
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
187
 
            self.group.connect_to_signal('StateChanged',
188
 
                                         self
189
 
                                         .entry_group_state_changed)
190
 
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
191
 
                     self.name, self.type)
192
 
        self.group.AddService(
193
 
            self.interface,
194
 
            self.protocol,
195
 
            dbus.UInt32(0),     # flags
196
 
            self.name, self.type,
197
 
            self.domain, self.host,
198
 
            dbus.UInt16(self.port),
199
 
            avahi.string_array_to_txt_array(self.TXT))
200
 
        self.group.Commit()
201
 
    def entry_group_state_changed(self, state, error):
202
 
        """Derived from the Avahi example code"""
203
 
        logger.debug("Avahi entry group state change: %i", state)
204
 
        
205
 
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
206
 
            logger.debug("Zeroconf service established.")
207
 
        elif state == avahi.ENTRY_GROUP_COLLISION:
208
 
            logger.info("Zeroconf service name collision.")
209
 
            self.rename()
210
 
        elif state == avahi.ENTRY_GROUP_FAILURE:
211
 
            logger.critical("Avahi: Error in group state changed %s",
212
 
                            unicode(error))
213
 
            raise AvahiGroupError("State changed: %s"
214
 
                                  % unicode(error))
215
 
    def cleanup(self):
216
 
        """Derived from the Avahi example code"""
217
 
        if self.group is not None:
218
 
            self.group.Free()
219
 
            self.group = None
220
 
    def server_state_changed(self, state):
221
 
        """Derived from the Avahi example code"""
222
 
        logger.debug("Avahi server state change: %i", state)
223
 
        if state == avahi.SERVER_COLLISION:
224
 
            logger.error("Zeroconf server name collision")
225
 
            self.remove()
226
 
        elif state == avahi.SERVER_RUNNING:
227
 
            self.add()
228
 
    def activate(self):
229
 
        """Derived from the Avahi example code"""
230
 
        if self.server is None:
231
 
            self.server = dbus.Interface(
232
 
                self.bus.get_object(avahi.DBUS_NAME,
233
 
                                    avahi.DBUS_PATH_SERVER),
234
 
                avahi.DBUS_INTERFACE_SERVER)
235
 
        self.server.connect_to_signal("StateChanged",
236
 
                                 self.server_state_changed)
237
 
        self.server_state_changed(self.server.GetState())
 
148
        global group
 
149
        if group is None:
 
150
            group = dbus.Interface\
 
151
                    (bus.get_object(avahi.DBUS_NAME,
 
152
                                    server.EntryGroupNew()),
 
153
                     avahi.DBUS_INTERFACE_ENTRY_GROUP)
 
154
            group.connect_to_signal('StateChanged',
 
155
                                    entry_group_state_changed)
 
156
        logger.debug(u"Adding Zeroconf service '%s' of type '%s' ...",
 
157
                     service.name, service.type)
 
158
        group.AddService(
 
159
                self.interface,         # interface
 
160
                avahi.PROTO_INET6,      # protocol
 
161
                dbus.UInt32(0),         # flags
 
162
                self.name, self.type,
 
163
                self.domain, self.host,
 
164
                dbus.UInt16(self.port),
 
165
                avahi.string_array_to_txt_array(self.TXT))
 
166
        group.Commit()
 
167
 
 
168
# From the Avahi example code:
 
169
group = None                            # our entry group
 
170
# End of Avahi example code
238
171
 
239
172
 
240
173
class Client(object):
241
174
    """A representation of a client host served by this server.
242
 
    
243
175
    Attributes:
244
 
    _approved:   bool(); 'None' if not yet approved/disapproved
245
 
    approval_delay: datetime.timedelta(); Time to wait for approval
246
 
    approval_duration: datetime.timedelta(); Duration of one approval
247
 
    checker:    subprocess.Popen(); a running checker process used
248
 
                                    to see if the client lives.
249
 
                                    'None' if no process is running.
250
 
    checker_callback_tag: a gobject event source tag, or None
251
 
    checker_command: string; External command which is run to check
252
 
                     if client lives.  %() expansions are done at
 
176
    name:      string; from the config file, used in log messages
 
177
    fingerprint: string (40 or 32 hexadecimal digits); used to
 
178
                 uniquely identify the client
 
179
    secret:    bytestring; sent verbatim (over TLS) to client
 
180
    host:      string; available for use by the checker command
 
181
    created:   datetime.datetime(); object creation, not client host
 
182
    last_checked_ok: datetime.datetime() or None if not yet checked OK
 
183
    timeout:   datetime.timedelta(); How long from last_checked_ok
 
184
                                     until this client is invalid
 
185
    interval:  datetime.timedelta(); How often to start a new checker
 
186
    stop_hook: If set, called by stop() as stop_hook(self)
 
187
    checker:   subprocess.Popen(); a running checker process used
 
188
                                   to see if the client lives.
 
189
                                   'None' if no process is running.
 
190
    checker_initiator_tag: a gobject event source tag, or None
 
191
    stop_initiator_tag:    - '' -
 
192
    checker_callback_tag:  - '' -
 
193
    checker_command: string; External command which is run to check if
 
194
                     client lives.  %() expansions are done at
253
195
                     runtime with vars(self) as dict, so that for
254
196
                     instance %(name)s can be used in the command.
255
 
    checker_initiator_tag: a gobject event source tag, or None
256
 
    created:    datetime.datetime(); (UTC) object creation
257
 
    current_checker_command: string; current running checker_command
258
 
    disable_hook:  If set, called by disable() as disable_hook(self)
259
 
    disable_initiator_tag: a gobject event source tag, or None
260
 
    enabled:    bool()
261
 
    fingerprint: string (40 or 32 hexadecimal digits); used to
262
 
                 uniquely identify the client
263
 
    host:       string; available for use by the checker command
264
 
    interval:   datetime.timedelta(); How often to start a new checker
265
 
    last_approval_request: datetime.datetime(); (UTC) or None
266
 
    last_checked_ok: datetime.datetime(); (UTC) or None
267
 
    last_enabled: datetime.datetime(); (UTC)
268
 
    name:       string; from the config file, used in log messages and
269
 
                        D-Bus identifiers
270
 
    secret:     bytestring; sent verbatim (over TLS) to client
271
 
    timeout:    datetime.timedelta(); How long from last_checked_ok
272
 
                                      until this client is disabled
273
 
    runtime_expansions: Allowed attributes for runtime expansion.
 
197
    Private attibutes:
 
198
    _timeout: Real variable for 'timeout'
 
199
    _interval: Real variable for 'interval'
 
200
    _timeout_milliseconds: Used when calling gobject.timeout_add()
 
201
    _interval_milliseconds: - '' -
274
202
    """
275
 
    
276
 
    runtime_expansions = ("approval_delay", "approval_duration",
277
 
                          "created", "enabled", "fingerprint",
278
 
                          "host", "interval", "last_checked_ok",
279
 
                          "last_enabled", "name", "timeout")
280
 
    
281
 
    @staticmethod
282
 
    def _timedelta_to_milliseconds(td):
283
 
        "Convert a datetime.timedelta() to milliseconds"
284
 
        return ((td.days * 24 * 60 * 60 * 1000)
285
 
                + (td.seconds * 1000)
286
 
                + (td.microseconds // 1000))
287
 
    
288
 
    def timeout_milliseconds(self):
289
 
        "Return the 'timeout' attribute in milliseconds"
290
 
        return self._timedelta_to_milliseconds(self.timeout)
291
 
    
292
 
    def interval_milliseconds(self):
293
 
        "Return the 'interval' attribute in milliseconds"
294
 
        return self._timedelta_to_milliseconds(self.interval)
295
 
 
296
 
    def approval_delay_milliseconds(self):
297
 
        return self._timedelta_to_milliseconds(self.approval_delay)
298
 
    
299
 
    def __init__(self, name = None, disable_hook=None, config=None):
 
203
    def _set_timeout(self, timeout):
 
204
        "Setter function for 'timeout' attribute"
 
205
        self._timeout = timeout
 
206
        self._timeout_milliseconds = ((self.timeout.days
 
207
                                       * 24 * 60 * 60 * 1000)
 
208
                                      + (self.timeout.seconds * 1000)
 
209
                                      + (self.timeout.microseconds
 
210
                                         // 1000))
 
211
    timeout = property(lambda self: self._timeout,
 
212
                       _set_timeout)
 
213
    del _set_timeout
 
214
    def _set_interval(self, interval):
 
215
        "Setter function for 'interval' attribute"
 
216
        self._interval = interval
 
217
        self._interval_milliseconds = ((self.interval.days
 
218
                                        * 24 * 60 * 60 * 1000)
 
219
                                       + (self.interval.seconds
 
220
                                          * 1000)
 
221
                                       + (self.interval.microseconds
 
222
                                          // 1000))
 
223
    interval = property(lambda self: self._interval,
 
224
                        _set_interval)
 
225
    del _set_interval
 
226
    def __init__(self, name = None, stop_hook=None, config=None):
300
227
        """Note: the 'checker' key in 'config' sets the
301
228
        'checker_command' attribute and *not* the 'checker'
302
229
        attribute."""
303
 
        self.name = name
304
230
        if config is None:
305
231
            config = {}
306
 
        logger.debug("Creating client %r", self.name)
 
232
        self.name = name
 
233
        logger.debug(u"Creating client %r", self.name)
307
234
        # Uppercase and remove spaces from fingerprint for later
308
235
        # comparison purposes with return value from the fingerprint()
309
236
        # function
310
 
        self.fingerprint = (config["fingerprint"].upper()
311
 
                            .replace(" ", ""))
312
 
        logger.debug("  Fingerprint: %s", self.fingerprint)
 
237
        self.fingerprint = config["fingerprint"].upper()\
 
238
                           .replace(u" ", u"")
 
239
        logger.debug(u"  Fingerprint: %s", self.fingerprint)
313
240
        if "secret" in config:
314
 
            self.secret = config["secret"].decode("base64")
 
241
            self.secret = config["secret"].decode(u"base64")
315
242
        elif "secfile" in config:
316
 
            with open(os.path.expanduser(os.path.expandvars
317
 
                                         (config["secfile"])),
318
 
                      "rb") as secfile:
319
 
                self.secret = secfile.read()
 
243
            secfile = open(config["secfile"])
 
244
            self.secret = secfile.read()
 
245
            secfile.close()
320
246
        else:
321
 
            raise TypeError("No secret or secfile for client %s"
 
247
            raise TypeError(u"No secret or secfile for client %s"
322
248
                            % self.name)
323
249
        self.host = config.get("host", "")
324
 
        self.created = datetime.datetime.utcnow()
325
 
        self.enabled = False
326
 
        self.last_approval_request = None
327
 
        self.last_enabled = None
 
250
        self.created = datetime.datetime.now()
328
251
        self.last_checked_ok = None
329
252
        self.timeout = string_to_delta(config["timeout"])
330
253
        self.interval = string_to_delta(config["interval"])
331
 
        self.disable_hook = disable_hook
 
254
        self.stop_hook = stop_hook
332
255
        self.checker = None
333
256
        self.checker_initiator_tag = None
334
 
        self.disable_initiator_tag = None
 
257
        self.stop_initiator_tag = None
335
258
        self.checker_callback_tag = None
336
 
        self.checker_command = config["checker"]
337
 
        self.current_checker_command = None
338
 
        self.last_connect = None
339
 
        self._approved = None
340
 
        self.approved_by_default = config.get("approved_by_default",
341
 
                                              True)
342
 
        self.approvals_pending = 0
343
 
        self.approval_delay = string_to_delta(
344
 
            config["approval_delay"])
345
 
        self.approval_duration = string_to_delta(
346
 
            config["approval_duration"])
347
 
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
348
 
    
349
 
    def send_changedstate(self):
350
 
        self.changedstate.acquire()
351
 
        self.changedstate.notify_all()
352
 
        self.changedstate.release()
353
 
        
354
 
    def enable(self):
 
259
        self.check_command = config["checker"]
 
260
    def start(self):
355
261
        """Start this client's checker and timeout hooks"""
356
 
        if getattr(self, "enabled", False):
357
 
            # Already enabled
358
 
            return
359
 
        self.send_changedstate()
360
 
        self.last_enabled = datetime.datetime.utcnow()
361
262
        # Schedule a new checker to be started an 'interval' from now,
362
263
        # and every interval from then on.
363
 
        self.checker_initiator_tag = (gobject.timeout_add
364
 
                                      (self.interval_milliseconds(),
365
 
                                       self.start_checker))
366
 
        # Schedule a disable() when 'timeout' has passed
367
 
        self.disable_initiator_tag = (gobject.timeout_add
368
 
                                   (self.timeout_milliseconds(),
369
 
                                    self.disable))
370
 
        self.enabled = True
 
264
        self.checker_initiator_tag = gobject.timeout_add\
 
265
                                     (self._interval_milliseconds,
 
266
                                      self.start_checker)
371
267
        # Also start a new checker *right now*.
372
268
        self.start_checker()
373
 
    
374
 
    def disable(self, quiet=True):
375
 
        """Disable this client."""
376
 
        if not getattr(self, "enabled", False):
 
269
        # Schedule a stop() when 'timeout' has passed
 
270
        self.stop_initiator_tag = gobject.timeout_add\
 
271
                                  (self._timeout_milliseconds,
 
272
                                   self.stop)
 
273
    def stop(self):
 
274
        """Stop this client.
 
275
        The possibility that a client might be restarted is left open,
 
276
        but not currently used."""
 
277
        # If this client doesn't have a secret, it is already stopped.
 
278
        if hasattr(self, "secret") and self.secret:
 
279
            logger.info(u"Stopping client %s", self.name)
 
280
            self.secret = None
 
281
        else:
377
282
            return False
378
 
        if not quiet:
379
 
            self.send_changedstate()
380
 
        if not quiet:
381
 
            logger.info("Disabling client %s", self.name)
382
 
        if getattr(self, "disable_initiator_tag", False):
383
 
            gobject.source_remove(self.disable_initiator_tag)
384
 
            self.disable_initiator_tag = None
 
283
        if getattr(self, "stop_initiator_tag", False):
 
284
            gobject.source_remove(self.stop_initiator_tag)
 
285
            self.stop_initiator_tag = None
385
286
        if getattr(self, "checker_initiator_tag", False):
386
287
            gobject.source_remove(self.checker_initiator_tag)
387
288
            self.checker_initiator_tag = None
388
289
        self.stop_checker()
389
 
        if self.disable_hook:
390
 
            self.disable_hook(self)
391
 
        self.enabled = False
 
290
        if self.stop_hook:
 
291
            self.stop_hook(self)
392
292
        # Do not run this again if called by a gobject.timeout_add
393
293
        return False
394
 
    
395
294
    def __del__(self):
396
 
        self.disable_hook = None
397
 
        self.disable()
398
 
    
399
 
    def checker_callback(self, pid, condition, command):
 
295
        self.stop_hook = None
 
296
        self.stop()
 
297
    def checker_callback(self, pid, condition):
400
298
        """The checker has completed, so take appropriate actions."""
 
299
        now = datetime.datetime.now()
401
300
        self.checker_callback_tag = None
402
301
        self.checker = None
403
 
        if os.WIFEXITED(condition):
404
 
            exitstatus = os.WEXITSTATUS(condition)
405
 
            if exitstatus == 0:
406
 
                logger.info("Checker for %(name)s succeeded",
407
 
                            vars(self))
408
 
                self.checked_ok()
409
 
            else:
410
 
                logger.info("Checker for %(name)s failed",
411
 
                            vars(self))
412
 
        else:
413
 
            logger.warning("Checker for %(name)s crashed?",
 
302
        if os.WIFEXITED(condition) \
 
303
               and (os.WEXITSTATUS(condition) == 0):
 
304
            logger.info(u"Checker for %(name)s succeeded",
 
305
                        vars(self))
 
306
            self.last_checked_ok = now
 
307
            gobject.source_remove(self.stop_initiator_tag)
 
308
            self.stop_initiator_tag = gobject.timeout_add\
 
309
                                      (self._timeout_milliseconds,
 
310
                                       self.stop)
 
311
        elif not os.WIFEXITED(condition):
 
312
            logger.warning(u"Checker for %(name)s crashed?",
414
313
                           vars(self))
415
 
    
416
 
    def checked_ok(self):
417
 
        """Bump up the timeout for this client.
418
 
        
419
 
        This should only be called when the client has been seen,
420
 
        alive and well.
421
 
        """
422
 
        self.last_checked_ok = datetime.datetime.utcnow()
423
 
        gobject.source_remove(self.disable_initiator_tag)
424
 
        self.disable_initiator_tag = (gobject.timeout_add
425
 
                                      (self.timeout_milliseconds(),
426
 
                                       self.disable))
427
 
    
428
 
    def need_approval(self):
429
 
        self.last_approval_request = datetime.datetime.utcnow()
430
 
    
 
314
        else:
 
315
            logger.info(u"Checker for %(name)s failed",
 
316
                        vars(self))
431
317
    def start_checker(self):
432
318
        """Start a new checker subprocess if one is not running.
433
 
        
434
319
        If a checker already exists, leave it running and do
435
320
        nothing."""
436
321
        # The reason for not killing a running checker is that if we
439
324
        # client would inevitably timeout, since no checker would get
440
325
        # a chance to run to completion.  If we instead leave running
441
326
        # checkers alone, the checker would have to take more time
442
 
        # than 'timeout' for the client to be disabled, which is as it
443
 
        # should be.
444
 
        
445
 
        # If a checker exists, make sure it is not a zombie
446
 
        try:
447
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
448
 
        except (AttributeError, OSError), error:
449
 
            if (isinstance(error, OSError)
450
 
                and error.errno != errno.ECHILD):
451
 
                raise error
452
 
        else:
453
 
            if pid:
454
 
                logger.warning("Checker was a zombie")
455
 
                gobject.source_remove(self.checker_callback_tag)
456
 
                self.checker_callback(pid, status,
457
 
                                      self.current_checker_command)
458
 
        # Start a new checker if needed
 
327
        # than 'timeout' for the client to be declared invalid, which
 
328
        # is as it should be.
459
329
        if self.checker is None:
460
330
            try:
461
 
                # In case checker_command has exactly one % operator
462
 
                command = self.checker_command % self.host
 
331
                # In case check_command has exactly one % operator
 
332
                command = self.check_command % self.host
463
333
            except TypeError:
464
334
                # Escape attributes for the shell
465
 
                escaped_attrs = dict(
466
 
                    (attr,
467
 
                     re.escape(unicode(str(getattr(self, attr, "")),
468
 
                                       errors=
469
 
                                       'replace')))
470
 
                    for attr in
471
 
                    self.runtime_expansions)
472
 
 
 
335
                escaped_attrs = dict((key, re.escape(str(val)))
 
336
                                     for key, val in
 
337
                                     vars(self).iteritems())
473
338
                try:
474
 
                    command = self.checker_command % escaped_attrs
 
339
                    command = self.check_command % escaped_attrs
475
340
                except TypeError, error:
476
 
                    logger.error('Could not format string "%s":'
477
 
                                 ' %s', self.checker_command, error)
 
341
                    logger.error(u'Could not format string "%s":'
 
342
                                 u' %s', self.check_command, error)
478
343
                    return True # Try again later
479
 
            self.current_checker_command = command
480
344
            try:
481
 
                logger.info("Starting checker %r for %s",
 
345
                logger.info(u"Starting checker %r for %s",
482
346
                            command, self.name)
483
347
                # We don't need to redirect stdout and stderr, since
484
348
                # in normal mode, that is already done by daemon(),
487
351
                self.checker = subprocess.Popen(command,
488
352
                                                close_fds=True,
489
353
                                                shell=True, cwd="/")
490
 
                self.checker_callback_tag = (gobject.child_watch_add
491
 
                                             (self.checker.pid,
492
 
                                              self.checker_callback,
493
 
                                              data=command))
494
 
                # The checker may have completed before the gobject
495
 
                # watch was added.  Check for this.
496
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
497
 
                if pid:
498
 
                    gobject.source_remove(self.checker_callback_tag)
499
 
                    self.checker_callback(pid, status, command)
 
354
                self.checker_callback_tag = gobject.child_watch_add\
 
355
                                            (self.checker.pid,
 
356
                                             self.checker_callback)
500
357
            except OSError, error:
501
 
                logger.error("Failed to start subprocess: %s",
 
358
                logger.error(u"Failed to start subprocess: %s",
502
359
                             error)
503
360
        # Re-run this periodically if run by gobject.timeout_add
504
361
        return True
505
 
    
506
362
    def stop_checker(self):
507
363
        """Force the checker process, if any, to stop."""
508
364
        if self.checker_callback_tag:
510
366
            self.checker_callback_tag = None
511
367
        if getattr(self, "checker", None) is None:
512
368
            return
513
 
        logger.debug("Stopping checker for %(name)s", vars(self))
 
369
        logger.debug(u"Stopping checker for %(name)s", vars(self))
514
370
        try:
515
371
            os.kill(self.checker.pid, signal.SIGTERM)
516
 
            #time.sleep(0.5)
 
372
            #os.sleep(0.5)
517
373
            #if self.checker.poll() is None:
518
374
            #    os.kill(self.checker.pid, signal.SIGKILL)
519
375
        except OSError, error:
520
376
            if error.errno != errno.ESRCH: # No such process
521
377
                raise
522
378
        self.checker = None
523
 
 
524
 
def dbus_service_property(dbus_interface, signature="v",
525
 
                          access="readwrite", byte_arrays=False):
526
 
    """Decorators for marking methods of a DBusObjectWithProperties to
527
 
    become properties on the D-Bus.
528
 
    
529
 
    The decorated method will be called with no arguments by "Get"
530
 
    and with one argument by "Set".
531
 
    
532
 
    The parameters, where they are supported, are the same as
533
 
    dbus.service.method, except there is only "signature", since the
534
 
    type from Get() and the type sent to Set() is the same.
535
 
    """
536
 
    # Encoding deeply encoded byte arrays is not supported yet by the
537
 
    # "Set" method, so we fail early here:
538
 
    if byte_arrays and signature != "ay":
539
 
        raise ValueError("Byte arrays not supported for non-'ay'"
540
 
                         " signature %r" % signature)
541
 
    def decorator(func):
542
 
        func._dbus_is_property = True
543
 
        func._dbus_interface = dbus_interface
544
 
        func._dbus_signature = signature
545
 
        func._dbus_access = access
546
 
        func._dbus_name = func.__name__
547
 
        if func._dbus_name.endswith("_dbus_property"):
548
 
            func._dbus_name = func._dbus_name[:-14]
549
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
550
 
        return func
551
 
    return decorator
552
 
 
553
 
 
554
 
class DBusPropertyException(dbus.exceptions.DBusException):
555
 
    """A base class for D-Bus property-related exceptions
556
 
    """
557
 
    def __unicode__(self):
558
 
        return unicode(str(self))
559
 
 
560
 
 
561
 
class DBusPropertyAccessException(DBusPropertyException):
562
 
    """A property's access permissions disallows an operation.
563
 
    """
564
 
    pass
565
 
 
566
 
 
567
 
class DBusPropertyNotFound(DBusPropertyException):
568
 
    """An attempt was made to access a non-existing property.
569
 
    """
570
 
    pass
571
 
 
572
 
 
573
 
class DBusObjectWithProperties(dbus.service.Object):
574
 
    """A D-Bus object with properties.
575
 
 
576
 
    Classes inheriting from this can use the dbus_service_property
577
 
    decorator to expose methods as D-Bus properties.  It exposes the
578
 
    standard Get(), Set(), and GetAll() methods on the D-Bus.
579
 
    """
580
 
    
581
 
    @staticmethod
582
 
    def _is_dbus_property(obj):
583
 
        return getattr(obj, "_dbus_is_property", False)
584
 
    
585
 
    def _get_all_dbus_properties(self):
586
 
        """Returns a generator of (name, attribute) pairs
587
 
        """
588
 
        return ((prop._dbus_name, prop)
589
 
                for name, prop in
590
 
                inspect.getmembers(self, self._is_dbus_property))
591
 
    
592
 
    def _get_dbus_property(self, interface_name, property_name):
593
 
        """Returns a bound method if one exists which is a D-Bus
594
 
        property with the specified name and interface.
595
 
        """
596
 
        for name in (property_name,
597
 
                     property_name + "_dbus_property"):
598
 
            prop = getattr(self, name, None)
599
 
            if (prop is None
600
 
                or not self._is_dbus_property(prop)
601
 
                or prop._dbus_name != property_name
602
 
                or (interface_name and prop._dbus_interface
603
 
                    and interface_name != prop._dbus_interface)):
604
 
                continue
605
 
            return prop
606
 
        # No such property
607
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
608
 
                                   + interface_name + "."
609
 
                                   + property_name)
610
 
    
611
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
612
 
                         out_signature="v")
613
 
    def Get(self, interface_name, property_name):
614
 
        """Standard D-Bus property Get() method, see D-Bus standard.
615
 
        """
616
 
        prop = self._get_dbus_property(interface_name, property_name)
617
 
        if prop._dbus_access == "write":
618
 
            raise DBusPropertyAccessException(property_name)
619
 
        value = prop()
620
 
        if not hasattr(value, "variant_level"):
621
 
            return value
622
 
        return type(value)(value, variant_level=value.variant_level+1)
623
 
    
624
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
625
 
    def Set(self, interface_name, property_name, value):
626
 
        """Standard D-Bus property Set() method, see D-Bus standard.
627
 
        """
628
 
        prop = self._get_dbus_property(interface_name, property_name)
629
 
        if prop._dbus_access == "read":
630
 
            raise DBusPropertyAccessException(property_name)
631
 
        if prop._dbus_get_args_options["byte_arrays"]:
632
 
            # The byte_arrays option is not supported yet on
633
 
            # signatures other than "ay".
634
 
            if prop._dbus_signature != "ay":
635
 
                raise ValueError
636
 
            value = dbus.ByteArray(''.join(unichr(byte)
637
 
                                           for byte in value))
638
 
        prop(value)
639
 
    
640
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
641
 
                         out_signature="a{sv}")
642
 
    def GetAll(self, interface_name):
643
 
        """Standard D-Bus property GetAll() method, see D-Bus
644
 
        standard.
645
 
 
646
 
        Note: Will not include properties with access="write".
647
 
        """
648
 
        all = {}
649
 
        for name, prop in self._get_all_dbus_properties():
650
 
            if (interface_name
651
 
                and interface_name != prop._dbus_interface):
652
 
                # Interface non-empty but did not match
653
 
                continue
654
 
            # Ignore write-only properties
655
 
            if prop._dbus_access == "write":
656
 
                continue
657
 
            value = prop()
658
 
            if not hasattr(value, "variant_level"):
659
 
                all[name] = value
660
 
                continue
661
 
            all[name] = type(value)(value, variant_level=
662
 
                                    value.variant_level+1)
663
 
        return dbus.Dictionary(all, signature="sv")
664
 
    
665
 
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
666
 
                         out_signature="s",
667
 
                         path_keyword='object_path',
668
 
                         connection_keyword='connection')
669
 
    def Introspect(self, object_path, connection):
670
 
        """Standard D-Bus method, overloaded to insert property tags.
671
 
        """
672
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
673
 
                                                   connection)
674
 
        try:
675
 
            document = xml.dom.minidom.parseString(xmlstring)
676
 
            def make_tag(document, name, prop):
677
 
                e = document.createElement("property")
678
 
                e.setAttribute("name", name)
679
 
                e.setAttribute("type", prop._dbus_signature)
680
 
                e.setAttribute("access", prop._dbus_access)
681
 
                return e
682
 
            for if_tag in document.getElementsByTagName("interface"):
683
 
                for tag in (make_tag(document, name, prop)
684
 
                            for name, prop
685
 
                            in self._get_all_dbus_properties()
686
 
                            if prop._dbus_interface
687
 
                            == if_tag.getAttribute("name")):
688
 
                    if_tag.appendChild(tag)
689
 
                # Add the names to the return values for the
690
 
                # "org.freedesktop.DBus.Properties" methods
691
 
                if (if_tag.getAttribute("name")
692
 
                    == "org.freedesktop.DBus.Properties"):
693
 
                    for cn in if_tag.getElementsByTagName("method"):
694
 
                        if cn.getAttribute("name") == "Get":
695
 
                            for arg in cn.getElementsByTagName("arg"):
696
 
                                if (arg.getAttribute("direction")
697
 
                                    == "out"):
698
 
                                    arg.setAttribute("name", "value")
699
 
                        elif cn.getAttribute("name") == "GetAll":
700
 
                            for arg in cn.getElementsByTagName("arg"):
701
 
                                if (arg.getAttribute("direction")
702
 
                                    == "out"):
703
 
                                    arg.setAttribute("name", "props")
704
 
            xmlstring = document.toxml("utf-8")
705
 
            document.unlink()
706
 
        except (AttributeError, xml.dom.DOMException,
707
 
                xml.parsers.expat.ExpatError), error:
708
 
            logger.error("Failed to override Introspection method",
709
 
                         error)
710
 
        return xmlstring
711
 
 
712
 
 
713
 
class ClientDBus(Client, DBusObjectWithProperties):
714
 
    """A Client class using D-Bus
715
 
    
716
 
    Attributes:
717
 
    dbus_object_path: dbus.ObjectPath
718
 
    bus: dbus.SystemBus()
719
 
    """
720
 
    
721
 
    runtime_expansions = (Client.runtime_expansions
722
 
                          + ("dbus_object_path",))
723
 
    
724
 
    # dbus.service.Object doesn't use super(), so we can't either.
725
 
    
726
 
    def __init__(self, bus = None, *args, **kwargs):
727
 
        self._approvals_pending = 0
728
 
        self.bus = bus
729
 
        Client.__init__(self, *args, **kwargs)
730
 
        # Only now, when this client is initialized, can it show up on
731
 
        # the D-Bus
732
 
        client_object_name = unicode(self.name).translate(
733
 
            {ord("."): ord("_"),
734
 
             ord("-"): ord("_")})
735
 
        self.dbus_object_path = (dbus.ObjectPath
736
 
                                 ("/clients/" + client_object_name))
737
 
        DBusObjectWithProperties.__init__(self, self.bus,
738
 
                                          self.dbus_object_path)
739
 
        
740
 
    def _get_approvals_pending(self):
741
 
        return self._approvals_pending
742
 
    def _set_approvals_pending(self, value):
743
 
        old_value = self._approvals_pending
744
 
        self._approvals_pending = value
745
 
        bval = bool(value)
746
 
        if (hasattr(self, "dbus_object_path")
747
 
            and bval is not bool(old_value)):
748
 
            dbus_bool = dbus.Boolean(bval, variant_level=1)
749
 
            self.PropertyChanged(dbus.String("ApprovalPending"),
750
 
                                 dbus_bool)
751
 
 
752
 
    approvals_pending = property(_get_approvals_pending,
753
 
                                 _set_approvals_pending)
754
 
    del _get_approvals_pending, _set_approvals_pending
755
 
    
756
 
    @staticmethod
757
 
    def _datetime_to_dbus(dt, variant_level=0):
758
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
759
 
        return dbus.String(dt.isoformat(),
760
 
                           variant_level=variant_level)
761
 
    
762
 
    def enable(self):
763
 
        oldstate = getattr(self, "enabled", False)
764
 
        r = Client.enable(self)
765
 
        if oldstate != self.enabled:
766
 
            # Emit D-Bus signals
767
 
            self.PropertyChanged(dbus.String("Enabled"),
768
 
                                 dbus.Boolean(True, variant_level=1))
769
 
            self.PropertyChanged(
770
 
                dbus.String("LastEnabled"),
771
 
                self._datetime_to_dbus(self.last_enabled,
772
 
                                       variant_level=1))
773
 
        return r
774
 
    
775
 
    def disable(self, quiet = False):
776
 
        oldstate = getattr(self, "enabled", False)
777
 
        r = Client.disable(self, quiet=quiet)
778
 
        if not quiet and oldstate != self.enabled:
779
 
            # Emit D-Bus signal
780
 
            self.PropertyChanged(dbus.String("Enabled"),
781
 
                                 dbus.Boolean(False, variant_level=1))
782
 
        return r
783
 
    
784
 
    def __del__(self, *args, **kwargs):
785
 
        try:
786
 
            self.remove_from_connection()
787
 
        except LookupError:
788
 
            pass
789
 
        if hasattr(DBusObjectWithProperties, "__del__"):
790
 
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
791
 
        Client.__del__(self, *args, **kwargs)
792
 
    
793
 
    def checker_callback(self, pid, condition, command,
794
 
                         *args, **kwargs):
795
 
        self.checker_callback_tag = None
796
 
        self.checker = None
797
 
        # Emit D-Bus signal
798
 
        self.PropertyChanged(dbus.String("CheckerRunning"),
799
 
                             dbus.Boolean(False, variant_level=1))
800
 
        if os.WIFEXITED(condition):
801
 
            exitstatus = os.WEXITSTATUS(condition)
802
 
            # Emit D-Bus signal
803
 
            self.CheckerCompleted(dbus.Int16(exitstatus),
804
 
                                  dbus.Int64(condition),
805
 
                                  dbus.String(command))
806
 
        else:
807
 
            # Emit D-Bus signal
808
 
            self.CheckerCompleted(dbus.Int16(-1),
809
 
                                  dbus.Int64(condition),
810
 
                                  dbus.String(command))
811
 
        
812
 
        return Client.checker_callback(self, pid, condition, command,
813
 
                                       *args, **kwargs)
814
 
    
815
 
    def checked_ok(self, *args, **kwargs):
816
 
        r = Client.checked_ok(self, *args, **kwargs)
817
 
        # Emit D-Bus signal
818
 
        self.PropertyChanged(
819
 
            dbus.String("LastCheckedOK"),
820
 
            (self._datetime_to_dbus(self.last_checked_ok,
821
 
                                    variant_level=1)))
822
 
        return r
823
 
    
824
 
    def need_approval(self, *args, **kwargs):
825
 
        r = Client.need_approval(self, *args, **kwargs)
826
 
        # Emit D-Bus signal
827
 
        self.PropertyChanged(
828
 
            dbus.String("LastApprovalRequest"),
829
 
            (self._datetime_to_dbus(self.last_approval_request,
830
 
                                    variant_level=1)))
831
 
        return r
832
 
    
833
 
    def start_checker(self, *args, **kwargs):
834
 
        old_checker = self.checker
835
 
        if self.checker is not None:
836
 
            old_checker_pid = self.checker.pid
837
 
        else:
838
 
            old_checker_pid = None
839
 
        r = Client.start_checker(self, *args, **kwargs)
840
 
        # Only if new checker process was started
841
 
        if (self.checker is not None
842
 
            and old_checker_pid != self.checker.pid):
843
 
            # Emit D-Bus signal
844
 
            self.CheckerStarted(self.current_checker_command)
845
 
            self.PropertyChanged(
846
 
                dbus.String("CheckerRunning"),
847
 
                dbus.Boolean(True, variant_level=1))
848
 
        return r
849
 
    
850
 
    def stop_checker(self, *args, **kwargs):
851
 
        old_checker = getattr(self, "checker", None)
852
 
        r = Client.stop_checker(self, *args, **kwargs)
853
 
        if (old_checker is not None
854
 
            and getattr(self, "checker", None) is None):
855
 
            self.PropertyChanged(dbus.String("CheckerRunning"),
856
 
                                 dbus.Boolean(False, variant_level=1))
857
 
        return r
858
 
 
859
 
    def _reset_approved(self):
860
 
        self._approved = None
861
 
        return False
862
 
    
863
 
    def approve(self, value=True):
864
 
        self.send_changedstate()
865
 
        self._approved = value
866
 
        gobject.timeout_add(self._timedelta_to_milliseconds
867
 
                            (self.approval_duration),
868
 
                            self._reset_approved)
869
 
    
870
 
    
871
 
    ## D-Bus methods, signals & properties
872
 
    _interface = "se.bsnet.fukt.Mandos.Client"
873
 
    
874
 
    ## Signals
875
 
    
876
 
    # CheckerCompleted - signal
877
 
    @dbus.service.signal(_interface, signature="nxs")
878
 
    def CheckerCompleted(self, exitcode, waitstatus, command):
879
 
        "D-Bus signal"
880
 
        pass
881
 
    
882
 
    # CheckerStarted - signal
883
 
    @dbus.service.signal(_interface, signature="s")
884
 
    def CheckerStarted(self, command):
885
 
        "D-Bus signal"
886
 
        pass
887
 
    
888
 
    # PropertyChanged - signal
889
 
    @dbus.service.signal(_interface, signature="sv")
890
 
    def PropertyChanged(self, property, value):
891
 
        "D-Bus signal"
892
 
        pass
893
 
    
894
 
    # GotSecret - signal
895
 
    @dbus.service.signal(_interface)
896
 
    def GotSecret(self):
897
 
        """D-Bus signal
898
 
        Is sent after a successful transfer of secret from the Mandos
899
 
        server to mandos-client
900
 
        """
901
 
        pass
902
 
    
903
 
    # Rejected - signal
904
 
    @dbus.service.signal(_interface, signature="s")
905
 
    def Rejected(self, reason):
906
 
        "D-Bus signal"
907
 
        pass
908
 
    
909
 
    # NeedApproval - signal
910
 
    @dbus.service.signal(_interface, signature="tb")
911
 
    def NeedApproval(self, timeout, default):
912
 
        "D-Bus signal"
913
 
        return self.need_approval()
914
 
    
915
 
    ## Methods
916
 
    
917
 
    # Approve - method
918
 
    @dbus.service.method(_interface, in_signature="b")
919
 
    def Approve(self, value):
920
 
        self.approve(value)
921
 
    
922
 
    # CheckedOK - method
923
 
    @dbus.service.method(_interface)
924
 
    def CheckedOK(self):
925
 
        return self.checked_ok()
926
 
    
927
 
    # Enable - method
928
 
    @dbus.service.method(_interface)
929
 
    def Enable(self):
930
 
        "D-Bus method"
931
 
        self.enable()
932
 
    
933
 
    # StartChecker - method
934
 
    @dbus.service.method(_interface)
935
 
    def StartChecker(self):
936
 
        "D-Bus method"
937
 
        self.start_checker()
938
 
    
939
 
    # Disable - method
940
 
    @dbus.service.method(_interface)
941
 
    def Disable(self):
942
 
        "D-Bus method"
943
 
        self.disable()
944
 
    
945
 
    # StopChecker - method
946
 
    @dbus.service.method(_interface)
947
 
    def StopChecker(self):
948
 
        self.stop_checker()
949
 
    
950
 
    ## Properties
951
 
    
952
 
    # ApprovalPending - property
953
 
    @dbus_service_property(_interface, signature="b", access="read")
954
 
    def ApprovalPending_dbus_property(self):
955
 
        return dbus.Boolean(bool(self.approvals_pending))
956
 
    
957
 
    # ApprovedByDefault - property
958
 
    @dbus_service_property(_interface, signature="b",
959
 
                           access="readwrite")
960
 
    def ApprovedByDefault_dbus_property(self, value=None):
961
 
        if value is None:       # get
962
 
            return dbus.Boolean(self.approved_by_default)
963
 
        self.approved_by_default = bool(value)
964
 
        # Emit D-Bus signal
965
 
        self.PropertyChanged(dbus.String("ApprovedByDefault"),
966
 
                             dbus.Boolean(value, variant_level=1))
967
 
    
968
 
    # ApprovalDelay - property
969
 
    @dbus_service_property(_interface, signature="t",
970
 
                           access="readwrite")
971
 
    def ApprovalDelay_dbus_property(self, value=None):
972
 
        if value is None:       # get
973
 
            return dbus.UInt64(self.approval_delay_milliseconds())
974
 
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
975
 
        # Emit D-Bus signal
976
 
        self.PropertyChanged(dbus.String("ApprovalDelay"),
977
 
                             dbus.UInt64(value, variant_level=1))
978
 
    
979
 
    # ApprovalDuration - property
980
 
    @dbus_service_property(_interface, signature="t",
981
 
                           access="readwrite")
982
 
    def ApprovalDuration_dbus_property(self, value=None):
983
 
        if value is None:       # get
984
 
            return dbus.UInt64(self._timedelta_to_milliseconds(
985
 
                    self.approval_duration))
986
 
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
987
 
        # Emit D-Bus signal
988
 
        self.PropertyChanged(dbus.String("ApprovalDuration"),
989
 
                             dbus.UInt64(value, variant_level=1))
990
 
    
991
 
    # Name - property
992
 
    @dbus_service_property(_interface, signature="s", access="read")
993
 
    def Name_dbus_property(self):
994
 
        return dbus.String(self.name)
995
 
    
996
 
    # Fingerprint - property
997
 
    @dbus_service_property(_interface, signature="s", access="read")
998
 
    def Fingerprint_dbus_property(self):
999
 
        return dbus.String(self.fingerprint)
1000
 
    
1001
 
    # Host - property
1002
 
    @dbus_service_property(_interface, signature="s",
1003
 
                           access="readwrite")
1004
 
    def Host_dbus_property(self, value=None):
1005
 
        if value is None:       # get
1006
 
            return dbus.String(self.host)
1007
 
        self.host = value
1008
 
        # Emit D-Bus signal
1009
 
        self.PropertyChanged(dbus.String("Host"),
1010
 
                             dbus.String(value, variant_level=1))
1011
 
    
1012
 
    # Created - property
1013
 
    @dbus_service_property(_interface, signature="s", access="read")
1014
 
    def Created_dbus_property(self):
1015
 
        return dbus.String(self._datetime_to_dbus(self.created))
1016
 
    
1017
 
    # LastEnabled - property
1018
 
    @dbus_service_property(_interface, signature="s", access="read")
1019
 
    def LastEnabled_dbus_property(self):
1020
 
        if self.last_enabled is None:
1021
 
            return dbus.String("")
1022
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
1023
 
    
1024
 
    # Enabled - property
1025
 
    @dbus_service_property(_interface, signature="b",
1026
 
                           access="readwrite")
1027
 
    def Enabled_dbus_property(self, value=None):
1028
 
        if value is None:       # get
1029
 
            return dbus.Boolean(self.enabled)
1030
 
        if value:
1031
 
            self.enable()
1032
 
        else:
1033
 
            self.disable()
1034
 
    
1035
 
    # LastCheckedOK - property
1036
 
    @dbus_service_property(_interface, signature="s",
1037
 
                           access="readwrite")
1038
 
    def LastCheckedOK_dbus_property(self, value=None):
1039
 
        if value is not None:
1040
 
            self.checked_ok()
1041
 
            return
 
379
    def still_valid(self):
 
380
        """Has the timeout not yet passed for this client?"""
 
381
        now = datetime.datetime.now()
1042
382
        if self.last_checked_ok is None:
1043
 
            return dbus.String("")
1044
 
        return dbus.String(self._datetime_to_dbus(self
1045
 
                                                  .last_checked_ok))
1046
 
    
1047
 
    # LastApprovalRequest - property
1048
 
    @dbus_service_property(_interface, signature="s", access="read")
1049
 
    def LastApprovalRequest_dbus_property(self):
1050
 
        if self.last_approval_request is None:
1051
 
            return dbus.String("")
1052
 
        return dbus.String(self.
1053
 
                           _datetime_to_dbus(self
1054
 
                                             .last_approval_request))
1055
 
    
1056
 
    # Timeout - property
1057
 
    @dbus_service_property(_interface, signature="t",
1058
 
                           access="readwrite")
1059
 
    def Timeout_dbus_property(self, value=None):
1060
 
        if value is None:       # get
1061
 
            return dbus.UInt64(self.timeout_milliseconds())
1062
 
        self.timeout = datetime.timedelta(0, 0, 0, value)
1063
 
        # Emit D-Bus signal
1064
 
        self.PropertyChanged(dbus.String("Timeout"),
1065
 
                             dbus.UInt64(value, variant_level=1))
1066
 
        if getattr(self, "disable_initiator_tag", None) is None:
1067
 
            return
1068
 
        # Reschedule timeout
1069
 
        gobject.source_remove(self.disable_initiator_tag)
1070
 
        self.disable_initiator_tag = None
1071
 
        time_to_die = (self.
1072
 
                       _timedelta_to_milliseconds((self
1073
 
                                                   .last_checked_ok
1074
 
                                                   + self.timeout)
1075
 
                                                  - datetime.datetime
1076
 
                                                  .utcnow()))
1077
 
        if time_to_die <= 0:
1078
 
            # The timeout has passed
1079
 
            self.disable()
1080
 
        else:
1081
 
            self.disable_initiator_tag = (gobject.timeout_add
1082
 
                                          (time_to_die, self.disable))
1083
 
    
1084
 
    # Interval - property
1085
 
    @dbus_service_property(_interface, signature="t",
1086
 
                           access="readwrite")
1087
 
    def Interval_dbus_property(self, value=None):
1088
 
        if value is None:       # get
1089
 
            return dbus.UInt64(self.interval_milliseconds())
1090
 
        self.interval = datetime.timedelta(0, 0, 0, value)
1091
 
        # Emit D-Bus signal
1092
 
        self.PropertyChanged(dbus.String("Interval"),
1093
 
                             dbus.UInt64(value, variant_level=1))
1094
 
        if getattr(self, "checker_initiator_tag", None) is None:
1095
 
            return
1096
 
        # Reschedule checker run
1097
 
        gobject.source_remove(self.checker_initiator_tag)
1098
 
        self.checker_initiator_tag = (gobject.timeout_add
1099
 
                                      (value, self.start_checker))
1100
 
        self.start_checker()    # Start one now, too
1101
 
 
1102
 
    # Checker - property
1103
 
    @dbus_service_property(_interface, signature="s",
1104
 
                           access="readwrite")
1105
 
    def Checker_dbus_property(self, value=None):
1106
 
        if value is None:       # get
1107
 
            return dbus.String(self.checker_command)
1108
 
        self.checker_command = value
1109
 
        # Emit D-Bus signal
1110
 
        self.PropertyChanged(dbus.String("Checker"),
1111
 
                             dbus.String(self.checker_command,
1112
 
                                         variant_level=1))
1113
 
    
1114
 
    # CheckerRunning - property
1115
 
    @dbus_service_property(_interface, signature="b",
1116
 
                           access="readwrite")
1117
 
    def CheckerRunning_dbus_property(self, value=None):
1118
 
        if value is None:       # get
1119
 
            return dbus.Boolean(self.checker is not None)
1120
 
        if value:
1121
 
            self.start_checker()
1122
 
        else:
1123
 
            self.stop_checker()
1124
 
    
1125
 
    # ObjectPath - property
1126
 
    @dbus_service_property(_interface, signature="o", access="read")
1127
 
    def ObjectPath_dbus_property(self):
1128
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1129
 
    
1130
 
    # Secret = property
1131
 
    @dbus_service_property(_interface, signature="ay",
1132
 
                           access="write", byte_arrays=True)
1133
 
    def Secret_dbus_property(self, value):
1134
 
        self.secret = str(value)
1135
 
    
1136
 
    del _interface
1137
 
 
1138
 
 
1139
 
class ProxyClient(object):
1140
 
    def __init__(self, child_pipe, fpr, address):
1141
 
        self._pipe = child_pipe
1142
 
        self._pipe.send(('init', fpr, address))
1143
 
        if not self._pipe.recv():
1144
 
            raise KeyError()
1145
 
 
1146
 
    def __getattribute__(self, name):
1147
 
        if(name == '_pipe'):
1148
 
            return super(ProxyClient, self).__getattribute__(name)
1149
 
        self._pipe.send(('getattr', name))
1150
 
        data = self._pipe.recv()
1151
 
        if data[0] == 'data':
1152
 
            return data[1]
1153
 
        if data[0] == 'function':
1154
 
            def func(*args, **kwargs):
1155
 
                self._pipe.send(('funcall', name, args, kwargs))
1156
 
                return self._pipe.recv()[1]
1157
 
            return func
1158
 
 
1159
 
    def __setattr__(self, name, value):
1160
 
        if(name == '_pipe'):
1161
 
            return super(ProxyClient, self).__setattr__(name, value)
1162
 
        self._pipe.send(('setattr', name, value))
1163
 
 
1164
 
 
1165
 
class ClientHandler(socketserver.BaseRequestHandler, object):
1166
 
    """A class to handle client connections.
1167
 
    
1168
 
    Instantiated once for each connection to handle it.
 
383
            return now < (self.created + self.timeout)
 
384
        else:
 
385
            return now < (self.last_checked_ok + self.timeout)
 
386
 
 
387
 
 
388
def peer_certificate(session):
 
389
    "Return the peer's OpenPGP certificate as a bytestring"
 
390
    # If not an OpenPGP certificate...
 
391
    if gnutls.library.functions.gnutls_certificate_type_get\
 
392
            (session._c_object) \
 
393
           != gnutls.library.constants.GNUTLS_CRT_OPENPGP:
 
394
        # ...do the normal thing
 
395
        return session.peer_certificate
 
396
    list_size = ctypes.c_uint()
 
397
    cert_list = gnutls.library.functions.gnutls_certificate_get_peers\
 
398
        (session._c_object, ctypes.byref(list_size))
 
399
    if list_size.value == 0:
 
400
        return None
 
401
    cert = cert_list[0]
 
402
    return ctypes.string_at(cert.data, cert.size)
 
403
 
 
404
 
 
405
def fingerprint(openpgp):
 
406
    "Convert an OpenPGP bytestring to a hexdigit fingerprint string"
 
407
    # New GnuTLS "datum" with the OpenPGP public key
 
408
    datum = gnutls.library.types.gnutls_datum_t\
 
409
        (ctypes.cast(ctypes.c_char_p(openpgp),
 
410
                     ctypes.POINTER(ctypes.c_ubyte)),
 
411
         ctypes.c_uint(len(openpgp)))
 
412
    # New empty GnuTLS certificate
 
413
    crt = gnutls.library.types.gnutls_openpgp_crt_t()
 
414
    gnutls.library.functions.gnutls_openpgp_crt_init\
 
415
        (ctypes.byref(crt))
 
416
    # Import the OpenPGP public key into the certificate
 
417
    gnutls.library.functions.gnutls_openpgp_crt_import\
 
418
                    (crt, ctypes.byref(datum),
 
419
                     gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)
 
420
    # Verify the self signature in the key
 
421
    crtverify = ctypes.c_uint()
 
422
    gnutls.library.functions.gnutls_openpgp_crt_verify_self\
 
423
        (crt, 0, ctypes.byref(crtverify))
 
424
    if crtverify.value != 0:
 
425
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
426
        raise gnutls.errors.CertificateSecurityError("Verify failed")
 
427
    # New buffer for the fingerprint
 
428
    buf = ctypes.create_string_buffer(20)
 
429
    buf_len = ctypes.c_size_t()
 
430
    # Get the fingerprint from the certificate into the buffer
 
431
    gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint\
 
432
        (crt, ctypes.byref(buf), ctypes.byref(buf_len))
 
433
    # Deinit the certificate
 
434
    gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
435
    # Convert the buffer to a Python bytestring
 
436
    fpr = ctypes.string_at(buf, buf_len.value)
 
437
    # Convert the bytestring to hexadecimal notation
 
438
    hex_fpr = u''.join(u"%02X" % ord(char) for char in fpr)
 
439
    return hex_fpr
 
440
 
 
441
 
 
442
class TCP_handler(SocketServer.BaseRequestHandler, object):
 
443
    """A TCP request handler class.
 
444
    Instantiated by IPv6_TCPServer for each request to handle it.
1169
445
    Note: This will run in its own forked process."""
1170
446
    
1171
447
    def handle(self):
1172
 
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1173
 
            logger.info("TCP connection from: %s",
1174
 
                        unicode(self.client_address))
1175
 
            logger.debug("Pipe FD: %d",
1176
 
                         self.server.child_pipe.fileno())
1177
 
 
1178
 
            session = (gnutls.connection
1179
 
                       .ClientSession(self.request,
1180
 
                                      gnutls.connection
1181
 
                                      .X509Credentials()))
1182
 
 
1183
 
            # Note: gnutls.connection.X509Credentials is really a
1184
 
            # generic GnuTLS certificate credentials object so long as
1185
 
            # no X.509 keys are added to it.  Therefore, we can use it
1186
 
            # here despite using OpenPGP certificates.
1187
 
 
1188
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1189
 
            #                      "+AES-256-CBC", "+SHA1",
1190
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1191
 
            #                      "+DHE-DSS"))
1192
 
            # Use a fallback default, since this MUST be set.
1193
 
            priority = self.server.gnutls_priority
1194
 
            if priority is None:
1195
 
                priority = "NORMAL"
1196
 
            (gnutls.library.functions
1197
 
             .gnutls_priority_set_direct(session._c_object,
1198
 
                                         priority, None))
1199
 
 
1200
 
            # Start communication using the Mandos protocol
1201
 
            # Get protocol number
1202
 
            line = self.request.makefile().readline()
1203
 
            logger.debug("Protocol version: %r", line)
1204
 
            try:
1205
 
                if int(line.strip().split()[0]) > 1:
1206
 
                    raise RuntimeError
1207
 
            except (ValueError, IndexError, RuntimeError), error:
1208
 
                logger.error("Unknown protocol version: %s", error)
1209
 
                return
1210
 
 
1211
 
            # Start GnuTLS connection
1212
 
            try:
1213
 
                session.handshake()
1214
 
            except gnutls.errors.GNUTLSError, error:
1215
 
                logger.warning("Handshake failed: %s", error)
1216
 
                # Do not run session.bye() here: the session is not
1217
 
                # established.  Just abandon the request.
1218
 
                return
1219
 
            logger.debug("Handshake succeeded")
1220
 
 
1221
 
            approval_required = False
1222
 
            try:
1223
 
                try:
1224
 
                    fpr = self.fingerprint(self.peer_certificate
1225
 
                                           (session))
1226
 
                except (TypeError, gnutls.errors.GNUTLSError), error:
1227
 
                    logger.warning("Bad certificate: %s", error)
1228
 
                    return
1229
 
                logger.debug("Fingerprint: %s", fpr)
1230
 
 
1231
 
                try:
1232
 
                    client = ProxyClient(child_pipe, fpr,
1233
 
                                         self.client_address)
1234
 
                except KeyError:
1235
 
                    return
1236
 
                
1237
 
                if client.approval_delay:
1238
 
                    delay = client.approval_delay
1239
 
                    client.approvals_pending += 1
1240
 
                    approval_required = True
1241
 
                
1242
 
                while True:
1243
 
                    if not client.enabled:
1244
 
                        logger.warning("Client %s is disabled",
1245
 
                                       client.name)
1246
 
                        if self.server.use_dbus:
1247
 
                            # Emit D-Bus signal
1248
 
                            client.Rejected("Disabled")                    
1249
 
                        return
1250
 
                    
1251
 
                    if client._approved or not client.approval_delay:
1252
 
                        #We are approved or approval is disabled
1253
 
                        break
1254
 
                    elif client._approved is None:
1255
 
                        logger.info("Client %s needs approval",
1256
 
                                    client.name)
1257
 
                        if self.server.use_dbus:
1258
 
                            # Emit D-Bus signal
1259
 
                            client.NeedApproval(
1260
 
                                client.approval_delay_milliseconds(),
1261
 
                                client.approved_by_default)
1262
 
                    else:
1263
 
                        logger.warning("Client %s was not approved",
1264
 
                                       client.name)
1265
 
                        if self.server.use_dbus:
1266
 
                            # Emit D-Bus signal
1267
 
                            client.Rejected("Denied")
1268
 
                        return
1269
 
                    
1270
 
                    #wait until timeout or approved
1271
 
                    #x = float(client._timedelta_to_milliseconds(delay))
1272
 
                    time = datetime.datetime.now()
1273
 
                    client.changedstate.acquire()
1274
 
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
1275
 
                    client.changedstate.release()
1276
 
                    time2 = datetime.datetime.now()
1277
 
                    if (time2 - time) >= delay:
1278
 
                        if not client.approved_by_default:
1279
 
                            logger.warning("Client %s timed out while"
1280
 
                                           " waiting for approval",
1281
 
                                           client.name)
1282
 
                            if self.server.use_dbus:
1283
 
                                # Emit D-Bus signal
1284
 
                                client.Rejected("Approval timed out")
1285
 
                            return
1286
 
                        else:
1287
 
                            break
1288
 
                    else:
1289
 
                        delay -= time2 - time
1290
 
                
1291
 
                sent_size = 0
1292
 
                while sent_size < len(client.secret):
1293
 
                    try:
1294
 
                        sent = session.send(client.secret[sent_size:])
1295
 
                    except (gnutls.errors.GNUTLSError), error:
1296
 
                        logger.warning("gnutls send failed")
1297
 
                        return
1298
 
                    logger.debug("Sent: %d, remaining: %d",
1299
 
                                 sent, len(client.secret)
1300
 
                                 - (sent_size + sent))
1301
 
                    sent_size += sent
1302
 
 
1303
 
                logger.info("Sending secret to %s", client.name)
1304
 
                # bump the timeout as if seen
1305
 
                client.checked_ok()
1306
 
                if self.server.use_dbus:
1307
 
                    # Emit D-Bus signal
1308
 
                    client.GotSecret()
1309
 
            
1310
 
            finally:
1311
 
                if approval_required:
1312
 
                    client.approvals_pending -= 1
1313
 
                try:
1314
 
                    session.bye()
1315
 
                except (gnutls.errors.GNUTLSError), error:
1316
 
                    logger.warning("GnuTLS bye failed")
1317
 
    
1318
 
    @staticmethod
1319
 
    def peer_certificate(session):
1320
 
        "Return the peer's OpenPGP certificate as a bytestring"
1321
 
        # If not an OpenPGP certificate...
1322
 
        if (gnutls.library.functions
1323
 
            .gnutls_certificate_type_get(session._c_object)
1324
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1325
 
            # ...do the normal thing
1326
 
            return session.peer_certificate
1327
 
        list_size = ctypes.c_uint(1)
1328
 
        cert_list = (gnutls.library.functions
1329
 
                     .gnutls_certificate_get_peers
1330
 
                     (session._c_object, ctypes.byref(list_size)))
1331
 
        if not bool(cert_list) and list_size.value != 0:
1332
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1333
 
                                            " certificate")
1334
 
        if list_size.value == 0:
1335
 
            return None
1336
 
        cert = cert_list[0]
1337
 
        return ctypes.string_at(cert.data, cert.size)
1338
 
    
1339
 
    @staticmethod
1340
 
    def fingerprint(openpgp):
1341
 
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1342
 
        # New GnuTLS "datum" with the OpenPGP public key
1343
 
        datum = (gnutls.library.types
1344
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1345
 
                                             ctypes.POINTER
1346
 
                                             (ctypes.c_ubyte)),
1347
 
                                 ctypes.c_uint(len(openpgp))))
1348
 
        # New empty GnuTLS certificate
1349
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1350
 
        (gnutls.library.functions
1351
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
1352
 
        # Import the OpenPGP public key into the certificate
1353
 
        (gnutls.library.functions
1354
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1355
 
                                    gnutls.library.constants
1356
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
1357
 
        # Verify the self signature in the key
1358
 
        crtverify = ctypes.c_uint()
1359
 
        (gnutls.library.functions
1360
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1361
 
                                         ctypes.byref(crtverify)))
1362
 
        if crtverify.value != 0:
1363
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1364
 
            raise (gnutls.errors.CertificateSecurityError
1365
 
                   ("Verify failed"))
1366
 
        # New buffer for the fingerprint
1367
 
        buf = ctypes.create_string_buffer(20)
1368
 
        buf_len = ctypes.c_size_t()
1369
 
        # Get the fingerprint from the certificate into the buffer
1370
 
        (gnutls.library.functions
1371
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1372
 
                                             ctypes.byref(buf_len)))
1373
 
        # Deinit the certificate
1374
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1375
 
        # Convert the buffer to a Python bytestring
1376
 
        fpr = ctypes.string_at(buf, buf_len.value)
1377
 
        # Convert the bytestring to hexadecimal notation
1378
 
        hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
1379
 
        return hex_fpr
1380
 
 
1381
 
 
1382
 
class MultiprocessingMixIn(object):
1383
 
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
1384
 
    def sub_process_main(self, request, address):
1385
 
        try:
1386
 
            self.finish_request(request, address)
1387
 
        except:
1388
 
            self.handle_error(request, address)
1389
 
        self.close_request(request)
1390
 
            
1391
 
    def process_request(self, request, address):
1392
 
        """Start a new process to process the request."""
1393
 
        multiprocessing.Process(target = self.sub_process_main,
1394
 
                                args = (request, address)).start()
1395
 
 
1396
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1397
 
    """ adds a pipe to the MixIn """
1398
 
    def process_request(self, request, client_address):
1399
 
        """Overrides and wraps the original process_request().
1400
 
        
1401
 
        This function creates a new pipe in self.pipe
1402
 
        """
1403
 
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1404
 
 
1405
 
        super(MultiprocessingMixInWithPipe,
1406
 
              self).process_request(request, client_address)
1407
 
        self.child_pipe.close()
1408
 
        self.add_pipe(parent_pipe)
1409
 
 
1410
 
    def add_pipe(self, parent_pipe):
1411
 
        """Dummy function; override as necessary"""
1412
 
        raise NotImplementedError
1413
 
 
1414
 
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1415
 
                     socketserver.TCPServer, object):
1416
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1417
 
    
 
448
        logger.info(u"TCP connection from: %s",
 
449
                     unicode(self.client_address))
 
450
        session = gnutls.connection.ClientSession\
 
451
                  (self.request, gnutls.connection.X509Credentials())
 
452
        
 
453
        line = self.request.makefile().readline()
 
454
        logger.debug(u"Protocol version: %r", line)
 
455
        try:
 
456
            if int(line.strip().split()[0]) > 1:
 
457
                raise RuntimeError
 
458
        except (ValueError, IndexError, RuntimeError), error:
 
459
            logger.error(u"Unknown protocol version: %s", error)
 
460
            return
 
461
        
 
462
        # Note: gnutls.connection.X509Credentials is really a generic
 
463
        # GnuTLS certificate credentials object so long as no X.509
 
464
        # keys are added to it.  Therefore, we can use it here despite
 
465
        # using OpenPGP certificates.
 
466
        
 
467
        #priority = ':'.join(("NONE", "+VERS-TLS1.1", "+AES-256-CBC",
 
468
        #                "+SHA1", "+COMP-NULL", "+CTYPE-OPENPGP",
 
469
        #                "+DHE-DSS"))
 
470
        priority = "NORMAL"             # Fallback default, since this
 
471
                                        # MUST be set.
 
472
        if self.server.settings["priority"]:
 
473
            priority = self.server.settings["priority"]
 
474
        gnutls.library.functions.gnutls_priority_set_direct\
 
475
            (session._c_object, priority, None)
 
476
        
 
477
        try:
 
478
            session.handshake()
 
479
        except gnutls.errors.GNUTLSError, error:
 
480
            logger.warning(u"Handshake failed: %s", error)
 
481
            # Do not run session.bye() here: the session is not
 
482
            # established.  Just abandon the request.
 
483
            return
 
484
        try:
 
485
            fpr = fingerprint(peer_certificate(session))
 
486
        except (TypeError, gnutls.errors.GNUTLSError), error:
 
487
            logger.warning(u"Bad certificate: %s", error)
 
488
            session.bye()
 
489
            return
 
490
        logger.debug(u"Fingerprint: %s", fpr)
 
491
        client = None
 
492
        for c in self.server.clients:
 
493
            if c.fingerprint == fpr:
 
494
                client = c
 
495
                break
 
496
        if not client:
 
497
            logger.warning(u"Client not found for fingerprint: %s",
 
498
                           fpr)
 
499
            session.bye()
 
500
            return
 
501
        # Have to check if client.still_valid(), since it is possible
 
502
        # that the client timed out while establishing the GnuTLS
 
503
        # session.
 
504
        if not client.still_valid():
 
505
            logger.warning(u"Client %(name)s is invalid",
 
506
                           vars(client))
 
507
            session.bye()
 
508
            return
 
509
        sent_size = 0
 
510
        while sent_size < len(client.secret):
 
511
            sent = session.send(client.secret[sent_size:])
 
512
            logger.debug(u"Sent: %d, remaining: %d",
 
513
                         sent, len(client.secret)
 
514
                         - (sent_size + sent))
 
515
            sent_size += sent
 
516
        session.bye()
 
517
 
 
518
 
 
519
class IPv6_TCPServer(SocketServer.ForkingTCPServer, object):
 
520
    """IPv6 TCP server.  Accepts 'None' as address and/or port.
1418
521
    Attributes:
 
522
        settings:       Server settings
 
523
        clients:        Set() of Client objects
1419
524
        enabled:        Boolean; whether this server is activated yet
1420
 
        interface:      None or a network interface name (string)
1421
 
        use_ipv6:       Boolean; to use IPv6 or not
1422
525
    """
1423
 
    def __init__(self, server_address, RequestHandlerClass,
1424
 
                 interface=None, use_ipv6=True):
1425
 
        self.interface = interface
1426
 
        if use_ipv6:
1427
 
            self.address_family = socket.AF_INET6
1428
 
        socketserver.TCPServer.__init__(self, server_address,
1429
 
                                        RequestHandlerClass)
 
526
    address_family = socket.AF_INET6
 
527
    def __init__(self, *args, **kwargs):
 
528
        if "settings" in kwargs:
 
529
            self.settings = kwargs["settings"]
 
530
            del kwargs["settings"]
 
531
        if "clients" in kwargs:
 
532
            self.clients = kwargs["clients"]
 
533
            del kwargs["clients"]
 
534
        self.enabled = False
 
535
        super(IPv6_TCPServer, self).__init__(*args, **kwargs)
1430
536
    def server_bind(self):
1431
537
        """This overrides the normal server_bind() function
1432
538
        to bind to an interface if one was specified, and also NOT to
1433
539
        bind to an address or port if they were not specified."""
1434
 
        if self.interface is not None:
1435
 
            if SO_BINDTODEVICE is None:
1436
 
                logger.error("SO_BINDTODEVICE does not exist;"
1437
 
                             " cannot bind to interface %s",
1438
 
                             self.interface)
1439
 
            else:
1440
 
                try:
1441
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1442
 
                                           SO_BINDTODEVICE,
1443
 
                                           str(self.interface
1444
 
                                               + '\0'))
1445
 
                except socket.error, error:
1446
 
                    if error[0] == errno.EPERM:
1447
 
                        logger.error("No permission to"
1448
 
                                     " bind to interface %s",
1449
 
                                     self.interface)
1450
 
                    elif error[0] == errno.ENOPROTOOPT:
1451
 
                        logger.error("SO_BINDTODEVICE not available;"
1452
 
                                     " cannot bind to interface %s",
1453
 
                                     self.interface)
1454
 
                    else:
1455
 
                        raise
 
540
        if self.settings["interface"]:
 
541
            # 25 is from /usr/include/asm-i486/socket.h
 
542
            SO_BINDTODEVICE = getattr(socket, "SO_BINDTODEVICE", 25)
 
543
            try:
 
544
                self.socket.setsockopt(socket.SOL_SOCKET,
 
545
                                       SO_BINDTODEVICE,
 
546
                                       self.settings["interface"])
 
547
            except socket.error, error:
 
548
                if error[0] == errno.EPERM:
 
549
                    logger.error(u"No permission to"
 
550
                                 u" bind to interface %s",
 
551
                                 self.settings["interface"])
 
552
                else:
 
553
                    raise error
1456
554
        # Only bind(2) the socket if we really need to.
1457
555
        if self.server_address[0] or self.server_address[1]:
1458
556
            if not self.server_address[0]:
1459
 
                if self.address_family == socket.AF_INET6:
1460
 
                    any_address = "::" # in6addr_any
1461
 
                else:
1462
 
                    any_address = socket.INADDR_ANY
1463
 
                self.server_address = (any_address,
 
557
                in6addr_any = "::"
 
558
                self.server_address = (in6addr_any,
1464
559
                                       self.server_address[1])
1465
560
            elif not self.server_address[1]:
1466
561
                self.server_address = (self.server_address[0],
1467
562
                                       0)
1468
 
#                 if self.interface:
 
563
#                 if self.settings["interface"]:
1469
564
#                     self.server_address = (self.server_address[0],
1470
565
#                                            0, # port
1471
566
#                                            0, # flowinfo
1472
567
#                                            if_nametoindex
1473
 
#                                            (self.interface))
1474
 
            return socketserver.TCPServer.server_bind(self)
1475
 
 
1476
 
 
1477
 
class MandosServer(IPv6_TCPServer):
1478
 
    """Mandos server.
1479
 
    
1480
 
    Attributes:
1481
 
        clients:        set of Client objects
1482
 
        gnutls_priority GnuTLS priority string
1483
 
        use_dbus:       Boolean; to emit D-Bus signals or not
1484
 
    
1485
 
    Assumes a gobject.MainLoop event loop.
1486
 
    """
1487
 
    def __init__(self, server_address, RequestHandlerClass,
1488
 
                 interface=None, use_ipv6=True, clients=None,
1489
 
                 gnutls_priority=None, use_dbus=True):
1490
 
        self.enabled = False
1491
 
        self.clients = clients
1492
 
        if self.clients is None:
1493
 
            self.clients = set()
1494
 
        self.use_dbus = use_dbus
1495
 
        self.gnutls_priority = gnutls_priority
1496
 
        IPv6_TCPServer.__init__(self, server_address,
1497
 
                                RequestHandlerClass,
1498
 
                                interface = interface,
1499
 
                                use_ipv6 = use_ipv6)
 
568
#                                            (self.settings
 
569
#                                             ["interface"]))
 
570
            return super(IPv6_TCPServer, self).server_bind()
1500
571
    def server_activate(self):
1501
572
        if self.enabled:
1502
 
            return socketserver.TCPServer.server_activate(self)
 
573
            return super(IPv6_TCPServer, self).server_activate()
1503
574
    def enable(self):
1504
575
        self.enabled = True
1505
 
    def add_pipe(self, parent_pipe):
1506
 
        # Call "handle_ipc" for both data and EOF events
1507
 
        gobject.io_add_watch(parent_pipe.fileno(),
1508
 
                             gobject.IO_IN | gobject.IO_HUP,
1509
 
                             functools.partial(self.handle_ipc,
1510
 
                                               parent_pipe = parent_pipe))
1511
 
        
1512
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1513
 
                   client_object=None):
1514
 
        condition_names = {
1515
 
            gobject.IO_IN: "IN",   # There is data to read.
1516
 
            gobject.IO_OUT: "OUT", # Data can be written (without
1517
 
                                    # blocking).
1518
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
1519
 
            gobject.IO_ERR: "ERR", # Error condition.
1520
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
1521
 
                                    # broken, usually for pipes and
1522
 
                                    # sockets).
1523
 
            }
1524
 
        conditions_string = ' | '.join(name
1525
 
                                       for cond, name in
1526
 
                                       condition_names.iteritems()
1527
 
                                       if cond & condition)
1528
 
        # error or the other end of multiprocessing.Pipe has closed
1529
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
1530
 
            return False
1531
 
        
1532
 
        # Read a request from the child
1533
 
        request = parent_pipe.recv()
1534
 
        command = request[0]
1535
 
        
1536
 
        if command == 'init':
1537
 
            fpr = request[1]
1538
 
            address = request[2]
1539
 
            
1540
 
            for c in self.clients:
1541
 
                if c.fingerprint == fpr:
1542
 
                    client = c
1543
 
                    break
1544
 
            else:
1545
 
                logger.warning("Client not found for fingerprint: %s, ad"
1546
 
                               "dress: %s", fpr, address)
1547
 
                if self.use_dbus:
1548
 
                    # Emit D-Bus signal
1549
 
                    mandos_dbus_service.ClientNotFound(fpr, address[0])
1550
 
                parent_pipe.send(False)
1551
 
                return False
1552
 
            
1553
 
            gobject.io_add_watch(parent_pipe.fileno(),
1554
 
                                 gobject.IO_IN | gobject.IO_HUP,
1555
 
                                 functools.partial(self.handle_ipc,
1556
 
                                                   parent_pipe = parent_pipe,
1557
 
                                                   client_object = client))
1558
 
            parent_pipe.send(True)
1559
 
            # remove the old hook in favor of the new above hook on same fileno
1560
 
            return False
1561
 
        if command == 'funcall':
1562
 
            funcname = request[1]
1563
 
            args = request[2]
1564
 
            kwargs = request[3]
1565
 
            
1566
 
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
1567
 
 
1568
 
        if command == 'getattr':
1569
 
            attrname = request[1]
1570
 
            if callable(client_object.__getattribute__(attrname)):
1571
 
                parent_pipe.send(('function',))
1572
 
            else:
1573
 
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1574
 
        
1575
 
        if command == 'setattr':
1576
 
            attrname = request[1]
1577
 
            value = request[2]
1578
 
            setattr(client_object, attrname, value)
1579
 
 
1580
 
        return True
1581
576
 
1582
577
 
1583
578
def string_to_delta(interval):
1584
579
    """Parse a string and return a datetime.timedelta
1585
 
    
 
580
 
1586
581
    >>> string_to_delta('7d')
1587
582
    datetime.timedelta(7)
1588
583
    >>> string_to_delta('60s')
1591
586
    datetime.timedelta(0, 3600)
1592
587
    >>> string_to_delta('24h')
1593
588
    datetime.timedelta(1)
1594
 
    >>> string_to_delta('1w')
 
589
    >>> string_to_delta(u'1w')
1595
590
    datetime.timedelta(7)
1596
591
    >>> string_to_delta('5m 30s')
1597
592
    datetime.timedelta(0, 330)
1601
596
        try:
1602
597
            suffix = unicode(s[-1])
1603
598
            value = int(s[:-1])
1604
 
            if suffix == "d":
 
599
            if suffix == u"d":
1605
600
                delta = datetime.timedelta(value)
1606
 
            elif suffix == "s":
 
601
            elif suffix == u"s":
1607
602
                delta = datetime.timedelta(0, value)
1608
 
            elif suffix == "m":
 
603
            elif suffix == u"m":
1609
604
                delta = datetime.timedelta(0, 0, 0, 0, value)
1610
 
            elif suffix == "h":
 
605
            elif suffix == u"h":
1611
606
                delta = datetime.timedelta(0, 0, 0, 0, 0, value)
1612
 
            elif suffix == "w":
 
607
            elif suffix == u"w":
1613
608
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1614
609
            else:
1615
 
                raise ValueError("Unknown suffix %r" % suffix)
1616
 
        except (ValueError, IndexError), e:
1617
 
            raise ValueError(*(e.args))
 
610
                raise ValueError
 
611
        except (ValueError, IndexError):
 
612
            raise ValueError
1618
613
        timevalue += delta
1619
614
    return timevalue
1620
615
 
1621
616
 
 
617
def server_state_changed(state):
 
618
    """Derived from the Avahi example code"""
 
619
    if state == avahi.SERVER_COLLISION:
 
620
        logger.error(u"Zeroconf server name collision")
 
621
        service.remove()
 
622
    elif state == avahi.SERVER_RUNNING:
 
623
        service.add()
 
624
 
 
625
 
 
626
def entry_group_state_changed(state, error):
 
627
    """Derived from the Avahi example code"""
 
628
    logger.debug(u"Avahi state change: %i", state)
 
629
    
 
630
    if state == avahi.ENTRY_GROUP_ESTABLISHED:
 
631
        logger.debug(u"Zeroconf service established.")
 
632
    elif state == avahi.ENTRY_GROUP_COLLISION:
 
633
        logger.warning(u"Zeroconf service name collision.")
 
634
        service.rename()
 
635
    elif state == avahi.ENTRY_GROUP_FAILURE:
 
636
        logger.critical(u"Avahi: Error in group state changed %s",
 
637
                        unicode(error))
 
638
        raise AvahiGroupError("State changed: %s", str(error))
 
639
 
1622
640
def if_nametoindex(interface):
1623
 
    """Call the C function if_nametoindex(), or equivalent
1624
 
    
1625
 
    Note: This function cannot accept a unicode string."""
 
641
    """Call the C function if_nametoindex(), or equivalent"""
1626
642
    global if_nametoindex
1627
643
    try:
1628
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1629
 
                          (ctypes.util.find_library("c"))
1630
 
                          .if_nametoindex)
 
644
        if_nametoindex = ctypes.cdll.LoadLibrary\
 
645
            (ctypes.util.find_library("c")).if_nametoindex
1631
646
    except (OSError, AttributeError):
1632
 
        logger.warning("Doing if_nametoindex the hard way")
 
647
        if "struct" not in sys.modules:
 
648
            import struct
 
649
        if "fcntl" not in sys.modules:
 
650
            import fcntl
1633
651
        def if_nametoindex(interface):
1634
652
            "Get an interface index the hard way, i.e. using fcntl()"
1635
653
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1636
 
            with contextlib.closing(socket.socket()) as s:
1637
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1638
 
                                    struct.pack(str("16s16x"),
1639
 
                                                interface))
1640
 
            interface_index = struct.unpack(str("I"),
1641
 
                                            ifreq[16:20])[0]
 
654
            s = socket.socket()
 
655
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
656
                                struct.pack("16s16x", interface))
 
657
            s.close()
 
658
            interface_index = struct.unpack("I", ifreq[16:20])[0]
1642
659
            return interface_index
1643
660
    return if_nametoindex(interface)
1644
661
 
1645
662
 
1646
663
def daemon(nochdir = False, noclose = False):
1647
664
    """See daemon(3).  Standard BSD Unix function.
1648
 
    
1649
665
    This should really exist as os.daemon, but it doesn't (yet)."""
1650
666
    if os.fork():
1651
667
        sys.exit()
1659
675
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1660
676
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1661
677
            raise OSError(errno.ENODEV,
1662
 
                          "%s not a character device"
1663
 
                          % os.path.devnull)
 
678
                          "/dev/null not a character device")
1664
679
        os.dup2(null, sys.stdin.fileno())
1665
680
        os.dup2(null, sys.stdout.fileno())
1666
681
        os.dup2(null, sys.stderr.fileno())
1669
684
 
1670
685
 
1671
686
def main():
1672
 
    
1673
 
    ##################################################################
1674
 
    # Parsing of options, both command line and config file
1675
 
    
1676
 
    parser = optparse.OptionParser(version = "%%prog %s" % version)
 
687
    parser = OptionParser(version = "%%prog %s" % version)
1677
688
    parser.add_option("-i", "--interface", type="string",
1678
689
                      metavar="IF", help="Bind to interface IF")
1679
690
    parser.add_option("-a", "--address", type="string",
1680
691
                      help="Address to listen for requests on")
1681
692
    parser.add_option("-p", "--port", type="int",
1682
693
                      help="Port number to receive requests on")
1683
 
    parser.add_option("--check", action="store_true",
 
694
    parser.add_option("--check", action="store_true", default=False,
1684
695
                      help="Run self-test")
1685
696
    parser.add_option("--debug", action="store_true",
1686
697
                      help="Debug mode; run in foreground and log to"
1687
698
                      " terminal")
1688
 
    parser.add_option("--debuglevel", type="string", metavar="LEVEL",
1689
 
                      help="Debug level for stdout output")
1690
699
    parser.add_option("--priority", type="string", help="GnuTLS"
1691
700
                      " priority string (see GnuTLS documentation)")
1692
 
    parser.add_option("--servicename", type="string",
1693
 
                      metavar="NAME", help="Zeroconf service name")
 
701
    parser.add_option("--servicename", type="string", metavar="NAME",
 
702
                      help="Zeroconf service name")
1694
703
    parser.add_option("--configdir", type="string",
1695
704
                      default="/etc/mandos", metavar="DIR",
1696
705
                      help="Directory to search for configuration"
1697
706
                      " files")
1698
 
    parser.add_option("--no-dbus", action="store_false",
1699
 
                      dest="use_dbus", help="Do not provide D-Bus"
1700
 
                      " system bus interface")
1701
 
    parser.add_option("--no-ipv6", action="store_false",
1702
 
                      dest="use_ipv6", help="Do not use IPv6")
1703
707
    options = parser.parse_args()[0]
1704
708
    
1705
709
    if options.check:
1715
719
                        "priority":
1716
720
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1717
721
                        "servicename": "Mandos",
1718
 
                        "use_dbus": "True",
1719
 
                        "use_ipv6": "True",
1720
 
                        "debuglevel": "",
1721
722
                        }
1722
723
    
1723
724
    # Parse config file for server-global settings
1724
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
725
    server_config = ConfigParser.SafeConfigParser(server_defaults)
1725
726
    del server_defaults
1726
 
    server_config.read(os.path.join(options.configdir,
1727
 
                                    "mandos.conf"))
 
727
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1728
728
    # Convert the SafeConfigParser object to a dict
1729
729
    server_settings = server_config.defaults()
1730
 
    # Use the appropriate methods on the non-string config options
1731
 
    for option in ("debug", "use_dbus", "use_ipv6"):
1732
 
        server_settings[option] = server_config.getboolean("DEFAULT",
1733
 
                                                           option)
1734
 
    if server_settings["port"]:
1735
 
        server_settings["port"] = server_config.getint("DEFAULT",
1736
 
                                                       "port")
 
730
    # Use getboolean on the boolean config option
 
731
    server_settings["debug"] = server_config.getboolean\
 
732
                               ("DEFAULT", "debug")
1737
733
    del server_config
1738
734
    
1739
735
    # Override the settings from the config file with command line
1740
736
    # options, if set.
1741
737
    for option in ("interface", "address", "port", "debug",
1742
 
                   "priority", "servicename", "configdir",
1743
 
                   "use_dbus", "use_ipv6", "debuglevel"):
 
738
                   "priority", "servicename", "configdir"):
1744
739
        value = getattr(options, option)
1745
740
        if value is not None:
1746
741
            server_settings[option] = value
1747
742
    del options
1748
 
    # Force all strings to be unicode
1749
 
    for option in server_settings.keys():
1750
 
        if type(server_settings[option]) is str:
1751
 
            server_settings[option] = unicode(server_settings[option])
1752
743
    # Now we have our good server settings in "server_settings"
1753
744
    
1754
 
    ##################################################################
1755
 
    
1756
 
    # For convenience
1757
745
    debug = server_settings["debug"]
1758
 
    debuglevel = server_settings["debuglevel"]
1759
 
    use_dbus = server_settings["use_dbus"]
1760
 
    use_ipv6 = server_settings["use_ipv6"]
1761
 
 
 
746
    
 
747
    if not debug:
 
748
        syslogger.setLevel(logging.WARNING)
 
749
        console.setLevel(logging.WARNING)
 
750
    
1762
751
    if server_settings["servicename"] != "Mandos":
1763
 
        syslogger.setFormatter(logging.Formatter
1764
 
                               ('Mandos (%s) [%%(process)d]:'
1765
 
                                ' %%(levelname)s: %%(message)s'
 
752
        syslogger.setFormatter(logging.Formatter\
 
753
                               ('Mandos (%s): %%(levelname)s:'
 
754
                                ' %%(message)s'
1766
755
                                % server_settings["servicename"]))
1767
756
    
1768
757
    # Parse config file with clients
1769
758
    client_defaults = { "timeout": "1h",
1770
759
                        "interval": "5m",
1771
 
                        "checker": "fping -q -- %%(host)s",
 
760
                        "checker": "fping -q -- %(host)s",
1772
761
                        "host": "",
1773
 
                        "approval_delay": "0s",
1774
 
                        "approval_duration": "1s",
1775
762
                        }
1776
 
    client_config = configparser.SafeConfigParser(client_defaults)
 
763
    client_config = ConfigParser.SafeConfigParser(client_defaults)
1777
764
    client_config.read(os.path.join(server_settings["configdir"],
1778
765
                                    "clients.conf"))
1779
766
    
1780
 
    global mandos_dbus_service
1781
 
    mandos_dbus_service = None
1782
 
    
1783
 
    tcp_server = MandosServer((server_settings["address"],
1784
 
                               server_settings["port"]),
1785
 
                              ClientHandler,
1786
 
                              interface=(server_settings["interface"]
1787
 
                                         or None),
1788
 
                              use_ipv6=use_ipv6,
1789
 
                              gnutls_priority=
1790
 
                              server_settings["priority"],
1791
 
                              use_dbus=use_dbus)
1792
 
    if not debug:
1793
 
        pidfilename = "/var/run/mandos.pid"
1794
 
        try:
1795
 
            pidfile = open(pidfilename, "w")
1796
 
        except IOError:
1797
 
            logger.error("Could not open file %r", pidfilename)
1798
 
    
1799
 
    try:
1800
 
        uid = pwd.getpwnam("_mandos").pw_uid
1801
 
        gid = pwd.getpwnam("_mandos").pw_gid
1802
 
    except KeyError:
1803
 
        try:
1804
 
            uid = pwd.getpwnam("mandos").pw_uid
1805
 
            gid = pwd.getpwnam("mandos").pw_gid
1806
 
        except KeyError:
1807
 
            try:
1808
 
                uid = pwd.getpwnam("nobody").pw_uid
1809
 
                gid = pwd.getpwnam("nobody").pw_gid
1810
 
            except KeyError:
1811
 
                uid = 65534
1812
 
                gid = 65534
1813
 
    try:
 
767
    clients = Set()
 
768
    tcp_server = IPv6_TCPServer((server_settings["address"],
 
769
                                 server_settings["port"]),
 
770
                                TCP_handler,
 
771
                                settings=server_settings,
 
772
                                clients=clients)
 
773
    pidfilename = "/var/run/mandos.pid"
 
774
    try:
 
775
        pidfile = open(pidfilename, "w")
 
776
    except IOError, error:
 
777
        logger.error("Could not open file %r", pidfilename)
 
778
    
 
779
    uid = 65534
 
780
    gid = 65534
 
781
    try:
 
782
        uid = pwd.getpwnam("mandos").pw_uid
 
783
    except KeyError:
 
784
        try:
 
785
            uid = pwd.getpwnam("nobody").pw_uid
 
786
        except KeyError:
 
787
            pass
 
788
    try:
 
789
        gid = pwd.getpwnam("mandos").pw_gid
 
790
    except KeyError:
 
791
        try:
 
792
            gid = pwd.getpwnam("nogroup").pw_gid
 
793
        except KeyError:
 
794
            pass
 
795
    try:
 
796
        os.setuid(uid)
1814
797
        os.setgid(gid)
1815
 
        os.setuid(uid)
1816
798
    except OSError, error:
1817
799
        if error[0] != errno.EPERM:
1818
800
            raise error
1819
801
    
1820
 
    if not debug and not debuglevel:
1821
 
        syslogger.setLevel(logging.WARNING)
1822
 
        console.setLevel(logging.WARNING)
1823
 
    if debuglevel:
1824
 
        level = getattr(logging, debuglevel.upper())
1825
 
        syslogger.setLevel(level)
1826
 
        console.setLevel(level)
1827
 
 
 
802
    global service
 
803
    service = AvahiService(name = server_settings["servicename"],
 
804
                           servicetype = "_mandos._tcp", )
 
805
    if server_settings["interface"]:
 
806
        service.interface = if_nametoindex\
 
807
                            (server_settings["interface"])
 
808
    
 
809
    global main_loop
 
810
    global bus
 
811
    global server
 
812
    # From the Avahi example code
 
813
    DBusGMainLoop(set_as_default=True )
 
814
    main_loop = gobject.MainLoop()
 
815
    bus = dbus.SystemBus()
 
816
    server = dbus.Interface(bus.get_object(avahi.DBUS_NAME,
 
817
                                           avahi.DBUS_PATH_SERVER),
 
818
                            avahi.DBUS_INTERFACE_SERVER)
 
819
    # End of Avahi example code
 
820
    
 
821
    def remove_from_clients(client):
 
822
        clients.remove(client)
 
823
        if not clients:
 
824
            logger.critical(u"No clients left, exiting")
 
825
            sys.exit()
 
826
    
 
827
    clients.update(Set(Client(name = section,
 
828
                              stop_hook = remove_from_clients,
 
829
                              config
 
830
                              = dict(client_config.items(section)))
 
831
                       for section in client_config.sections()))
 
832
    if not clients:
 
833
        logger.critical(u"No clients defined")
 
834
        sys.exit(1)
 
835
    
1828
836
    if debug:
1829
 
        # Enable all possible GnuTLS debugging
1830
 
        
1831
 
        # "Use a log level over 10 to enable all debugging options."
1832
 
        # - GnuTLS manual
1833
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1834
 
        
1835
 
        @gnutls.library.types.gnutls_log_func
1836
 
        def debug_gnutls(level, string):
1837
 
            logger.debug("GnuTLS: %s", string[:-1])
1838
 
        
1839
 
        (gnutls.library.functions
1840
 
         .gnutls_global_set_log_function(debug_gnutls))
1841
 
        
1842
837
        # Redirect stdin so all checkers get /dev/null
1843
838
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
1844
839
        os.dup2(null, sys.stdin.fileno())
1847
842
    else:
1848
843
        # No console logging
1849
844
        logger.removeHandler(console)
1850
 
    
1851
 
    # Need to fork before connecting to D-Bus
1852
 
    if not debug:
1853
845
        # Close all input and output, do double fork, etc.
1854
846
        daemon()
1855
847
    
1856
 
    global main_loop
1857
 
    # From the Avahi example code
1858
 
    DBusGMainLoop(set_as_default=True )
1859
 
    main_loop = gobject.MainLoop()
1860
 
    bus = dbus.SystemBus()
1861
 
    # End of Avahi example code
1862
 
    if use_dbus:
1863
 
        try:
1864
 
            bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1865
 
                                            bus, do_not_queue=True)
1866
 
        except dbus.exceptions.NameExistsException, e:
1867
 
            logger.error(unicode(e) + ", disabling D-Bus")
1868
 
            use_dbus = False
1869
 
            server_settings["use_dbus"] = False
1870
 
            tcp_server.use_dbus = False
1871
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1872
 
    service = AvahiService(name = server_settings["servicename"],
1873
 
                           servicetype = "_mandos._tcp",
1874
 
                           protocol = protocol, bus = bus)
1875
 
    if server_settings["interface"]:
1876
 
        service.interface = (if_nametoindex
1877
 
                             (str(server_settings["interface"])))
1878
 
    
1879
 
    global multiprocessing_manager
1880
 
    multiprocessing_manager = multiprocessing.Manager()
1881
 
    
1882
 
    client_class = Client
1883
 
    if use_dbus:
1884
 
        client_class = functools.partial(ClientDBus, bus = bus)
1885
 
    def client_config_items(config, section):
1886
 
        special_settings = {
1887
 
            "approved_by_default":
1888
 
                lambda: config.getboolean(section,
1889
 
                                          "approved_by_default"),
1890
 
            }
1891
 
        for name, value in config.items(section):
1892
 
            try:
1893
 
                yield (name, special_settings[name]())
1894
 
            except KeyError:
1895
 
                yield (name, value)
1896
 
    
1897
 
    tcp_server.clients.update(set(
1898
 
            client_class(name = section,
1899
 
                         config= dict(client_config_items(
1900
 
                        client_config, section)))
1901
 
            for section in client_config.sections()))
1902
 
    if not tcp_server.clients:
1903
 
        logger.warning("No clients defined")
 
848
    try:
 
849
        pid = os.getpid()
 
850
        pidfile.write(str(pid) + "\n")
 
851
        pidfile.close()
 
852
        del pidfile
 
853
    except IOError:
 
854
        logger.error(u"Could not write to file %r with PID %d",
 
855
                     pidfilename, pid)
 
856
    except NameError:
 
857
        # "pidfile" was never created
 
858
        pass
 
859
    del pidfilename
 
860
    
 
861
    def cleanup():
 
862
        "Cleanup function; run on exit"
 
863
        global group
 
864
        # From the Avahi example code
 
865
        if not group is None:
 
866
            group.Free()
 
867
            group = None
 
868
        # End of Avahi example code
1904
869
        
 
870
        while clients:
 
871
            client = clients.pop()
 
872
            client.stop_hook = None
 
873
            client.stop()
 
874
    
 
875
    atexit.register(cleanup)
 
876
    
1905
877
    if not debug:
1906
 
        try:
1907
 
            with pidfile:
1908
 
                pid = os.getpid()
1909
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
1910
 
            del pidfile
1911
 
        except IOError:
1912
 
            logger.error("Could not write to file %r with PID %d",
1913
 
                         pidfilename, pid)
1914
 
        except NameError:
1915
 
            # "pidfile" was never created
1916
 
            pass
1917
 
        del pidfilename
1918
 
        
1919
878
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1920
 
 
1921
879
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1922
880
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1923
881
    
1924
 
    if use_dbus:
1925
 
        class MandosDBusService(dbus.service.Object):
1926
 
            """A D-Bus proxy object"""
1927
 
            def __init__(self):
1928
 
                dbus.service.Object.__init__(self, bus, "/")
1929
 
            _interface = "se.bsnet.fukt.Mandos"
1930
 
            
1931
 
            @dbus.service.signal(_interface, signature="o")
1932
 
            def ClientAdded(self, objpath):
1933
 
                "D-Bus signal"
1934
 
                pass
1935
 
            
1936
 
            @dbus.service.signal(_interface, signature="ss")
1937
 
            def ClientNotFound(self, fingerprint, address):
1938
 
                "D-Bus signal"
1939
 
                pass
1940
 
            
1941
 
            @dbus.service.signal(_interface, signature="os")
1942
 
            def ClientRemoved(self, objpath, name):
1943
 
                "D-Bus signal"
1944
 
                pass
1945
 
            
1946
 
            @dbus.service.method(_interface, out_signature="ao")
1947
 
            def GetAllClients(self):
1948
 
                "D-Bus method"
1949
 
                return dbus.Array(c.dbus_object_path
1950
 
                                  for c in tcp_server.clients)
1951
 
            
1952
 
            @dbus.service.method(_interface,
1953
 
                                 out_signature="a{oa{sv}}")
1954
 
            def GetAllClientsWithProperties(self):
1955
 
                "D-Bus method"
1956
 
                return dbus.Dictionary(
1957
 
                    ((c.dbus_object_path, c.GetAll(""))
1958
 
                     for c in tcp_server.clients),
1959
 
                    signature="oa{sv}")
1960
 
            
1961
 
            @dbus.service.method(_interface, in_signature="o")
1962
 
            def RemoveClient(self, object_path):
1963
 
                "D-Bus method"
1964
 
                for c in tcp_server.clients:
1965
 
                    if c.dbus_object_path == object_path:
1966
 
                        tcp_server.clients.remove(c)
1967
 
                        c.remove_from_connection()
1968
 
                        # Don't signal anything except ClientRemoved
1969
 
                        c.disable(quiet=True)
1970
 
                        # Emit D-Bus signal
1971
 
                        self.ClientRemoved(object_path, c.name)
1972
 
                        return
1973
 
                raise KeyError(object_path)
1974
 
            
1975
 
            del _interface
1976
 
        
1977
 
        mandos_dbus_service = MandosDBusService()
1978
 
    
1979
 
    def cleanup():
1980
 
        "Cleanup function; run on exit"
1981
 
        service.cleanup()
1982
 
        
1983
 
        while tcp_server.clients:
1984
 
            client = tcp_server.clients.pop()
1985
 
            if use_dbus:
1986
 
                client.remove_from_connection()
1987
 
            client.disable_hook = None
1988
 
            # Don't signal anything except ClientRemoved
1989
 
            client.disable(quiet=True)
1990
 
            if use_dbus:
1991
 
                # Emit D-Bus signal
1992
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
1993
 
                                                  client.name)
1994
 
    
1995
 
    atexit.register(cleanup)
1996
 
    
1997
 
    for client in tcp_server.clients:
1998
 
        if use_dbus:
1999
 
            # Emit D-Bus signal
2000
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2001
 
        client.enable()
 
882
    for client in clients:
 
883
        client.start()
2002
884
    
2003
885
    tcp_server.enable()
2004
886
    tcp_server.server_activate()
2005
887
    
2006
888
    # Find out what port we got
2007
889
    service.port = tcp_server.socket.getsockname()[1]
2008
 
    if use_ipv6:
2009
 
        logger.info("Now listening on address %r, port %d,"
2010
 
                    " flowinfo %d, scope_id %d"
2011
 
                    % tcp_server.socket.getsockname())
2012
 
    else:                       # IPv4
2013
 
        logger.info("Now listening on address %r, port %d"
2014
 
                    % tcp_server.socket.getsockname())
 
890
    logger.info(u"Now listening on address %r, port %d, flowinfo %d,"
 
891
                u" scope_id %d" % tcp_server.socket.getsockname())
2015
892
    
2016
893
    #service.interface = tcp_server.socket.getsockname()[3]
2017
894
    
2018
895
    try:
2019
896
        # From the Avahi example code
 
897
        server.connect_to_signal("StateChanged", server_state_changed)
2020
898
        try:
2021
 
            service.activate()
 
899
            server_state_changed(server.GetState())
2022
900
        except dbus.exceptions.DBusException, error:
2023
 
            logger.critical("DBusException: %s", error)
2024
 
            cleanup()
 
901
            logger.critical(u"DBusException: %s", error)
2025
902
            sys.exit(1)
2026
903
        # End of Avahi example code
2027
904
        
2028
905
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2029
906
                             lambda *args, **kwargs:
2030
 
                             (tcp_server.handle_request
2031
 
                              (*args[2:], **kwargs) or True))
 
907
                             tcp_server.handle_request\
 
908
                             (*args[2:], **kwargs) or True)
2032
909
        
2033
 
        logger.debug("Starting main loop")
 
910
        logger.debug(u"Starting main loop")
2034
911
        main_loop.run()
2035
912
    except AvahiError, error:
2036
 
        logger.critical("AvahiError: %s", error)
2037
 
        cleanup()
 
913
        logger.critical(u"AvahiError: %s" + unicode(error))
2038
914
        sys.exit(1)
2039
915
    except KeyboardInterrupt:
2040
916
        if debug:
2041
 
            print("", file=sys.stderr)
2042
 
        logger.debug("Server received KeyboardInterrupt")
2043
 
    logger.debug("Server exiting")
2044
 
    # Must run before the D-Bus bus name gets deregistered
2045
 
    cleanup()
 
917
            print
2046
918
 
2047
919
if __name__ == '__main__':
2048
920
    main()