/mandos/trunk

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  • Committer: Teddy Hogeborn
  • Date: 2018-02-22 09:20:19 UTC
  • Revision ID: teddy@recompile.se-20180222092019-ehyz79hzti9dnk2g
Client bug fix: Don't use leak sanitizer with leaking libraries

* Makefile (plugin-helpers/mandos-client): Remove "-fsanitize=leak"
  from CFLAGS.

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Lines of Context:
mandos
1
1
#!/usr/bin/python
2
2
# -*- mode: python; coding: utf-8 -*-
3
 
# 
 
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
 
# 
 
5
#
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
9
# methods "add", "remove", "server_state_changed",
10
10
# "entry_group_state_changed", "cleanup", and "activate" in the
11
11
# "AvahiService" class, and some lines in "main".
12
 
# 
 
12
#
13
13
# Everything else is
14
 
# Copyright © 2008-2011 Teddy Hogeborn
15
 
# Copyright © 2008-2011 Björn Påhlsson
16
 
# 
17
 
# This program is free software: you can redistribute it and/or modify
18
 
# it under the terms of the GNU General Public License as published by
 
14
# Copyright © 2008-2018 Teddy Hogeborn
 
15
# Copyright © 2008-2018 Björn Påhlsson
 
16
#
 
17
# This file is part of Mandos.
 
18
#
 
19
# Mandos is free software: you can redistribute it and/or modify it
 
20
# under the terms of the GNU General Public License as published by
19
21
# the Free Software Foundation, either version 3 of the License, or
20
22
# (at your option) any later version.
21
23
#
22
 
#     This program is distributed in the hope that it will be useful,
23
 
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
 
24
#     Mandos is distributed in the hope that it will be useful, but
 
25
#     WITHOUT ANY WARRANTY; without even the implied warranty of
24
26
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
25
27
#     GNU General Public License for more details.
26
 
# 
 
28
#
27
29
# You should have received a copy of the GNU General Public License
28
 
# along with this program.  If not, see
29
 
# <http://www.gnu.org/licenses/>.
30
 
# 
 
30
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
31
#
31
32
# Contact the authors at <mandos@recompile.se>.
32
 
# 
 
33
#
33
34
 
34
35
from __future__ import (division, absolute_import, print_function,
35
36
                        unicode_literals)
36
37
 
37
 
import SocketServer as socketserver
 
38
try:
 
39
    from future_builtins import *
 
40
except ImportError:
 
41
    pass
 
42
 
 
43
try:
 
44
    import SocketServer as socketserver
 
45
except ImportError:
 
46
    import socketserver
38
47
import socket
39
48
import argparse
40
49
import datetime
41
50
import errno
42
 
import gnutls.crypto
43
 
import gnutls.connection
44
 
import gnutls.errors
45
 
import gnutls.library.functions
46
 
import gnutls.library.constants
47
 
import gnutls.library.types
48
 
import ConfigParser as configparser
 
51
try:
 
52
    import ConfigParser as configparser
 
53
except ImportError:
 
54
    import configparser
49
55
import sys
50
56
import re
51
57
import os
60
66
import struct
61
67
import fcntl
62
68
import functools
63
 
import cPickle as pickle
 
69
try:
 
70
    import cPickle as pickle
 
71
except ImportError:
 
72
    import pickle
64
73
import multiprocessing
65
74
import types
66
 
import hashlib
 
75
import binascii
 
76
import tempfile
 
77
import itertools
 
78
import collections
 
79
import codecs
67
80
 
68
81
import dbus
69
82
import dbus.service
70
 
import gobject
71
 
import avahi
 
83
from gi.repository import GLib
72
84
from dbus.mainloop.glib import DBusGMainLoop
73
85
import ctypes
74
86
import ctypes.util
75
87
import xml.dom.minidom
76
88
import inspect
77
 
import Crypto.Cipher.AES
78
89
 
 
90
# Try to find the value of SO_BINDTODEVICE:
79
91
try:
 
92
    # This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
 
93
    # newer, and it is also the most natural place for it:
80
94
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
81
95
except AttributeError:
82
96
    try:
 
97
        # This is where SO_BINDTODEVICE was up to and including Python
 
98
        # 2.6, and also 3.2:
83
99
        from IN import SO_BINDTODEVICE
84
100
    except ImportError:
85
 
        SO_BINDTODEVICE = None
86
 
 
87
 
 
88
 
version = "1.4.1"
 
101
        # In Python 2.7 it seems to have been removed entirely.
 
102
        # Try running the C preprocessor:
 
103
        try:
 
104
            cc = subprocess.Popen(["cc", "--language=c", "-E",
 
105
                                   "/dev/stdin"],
 
106
                                  stdin=subprocess.PIPE,
 
107
                                  stdout=subprocess.PIPE)
 
108
            stdout = cc.communicate(
 
109
                "#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]
 
110
            SO_BINDTODEVICE = int(stdout.splitlines()[-1])
 
111
        except (OSError, ValueError, IndexError):
 
112
            # No value found
 
113
            SO_BINDTODEVICE = None
 
114
 
 
115
if sys.version_info.major == 2:
 
116
    str = unicode
 
117
 
 
118
version = "1.7.18"
 
119
stored_state_file = "clients.pickle"
89
120
 
90
121
logger = logging.getLogger()
91
 
stored_state_path = "/var/lib/mandos/clients.pickle"
92
 
 
93
 
syslogger = (logging.handlers.SysLogHandler
94
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
95
 
              address = str("/dev/log")))
96
 
syslogger.setFormatter(logging.Formatter
97
 
                       ('Mandos [%(process)d]: %(levelname)s:'
98
 
                        ' %(message)s'))
99
 
logger.addHandler(syslogger)
100
 
 
101
 
console = logging.StreamHandler()
102
 
console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
103
 
                                       ' [%(process)d]:'
104
 
                                       ' %(levelname)s:'
105
 
                                       ' %(message)s'))
106
 
logger.addHandler(console)
 
122
syslogger = None
 
123
 
 
124
try:
 
125
    if_nametoindex = ctypes.cdll.LoadLibrary(
 
126
        ctypes.util.find_library("c")).if_nametoindex
 
127
except (OSError, AttributeError):
 
128
 
 
129
    def if_nametoindex(interface):
 
130
        "Get an interface index the hard way, i.e. using fcntl()"
 
131
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
 
132
        with contextlib.closing(socket.socket()) as s:
 
133
            ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
 
134
                                struct.pack(b"16s16x", interface))
 
135
        interface_index = struct.unpack("I", ifreq[16:20])[0]
 
136
        return interface_index
 
137
 
 
138
 
 
139
def copy_function(func):
 
140
    """Make a copy of a function"""
 
141
    if sys.version_info.major == 2:
 
142
        return types.FunctionType(func.func_code,
 
143
                                  func.func_globals,
 
144
                                  func.func_name,
 
145
                                  func.func_defaults,
 
146
                                  func.func_closure)
 
147
    else:
 
148
        return types.FunctionType(func.__code__,
 
149
                                  func.__globals__,
 
150
                                  func.__name__,
 
151
                                  func.__defaults__,
 
152
                                  func.__closure__)
 
153
 
 
154
 
 
155
def initlogger(debug, level=logging.WARNING):
 
156
    """init logger and add loglevel"""
 
157
 
 
158
    global syslogger
 
159
    syslogger = (logging.handlers.SysLogHandler(
 
160
        facility=logging.handlers.SysLogHandler.LOG_DAEMON,
 
161
        address="/dev/log"))
 
162
    syslogger.setFormatter(logging.Formatter
 
163
                           ('Mandos [%(process)d]: %(levelname)s:'
 
164
                            ' %(message)s'))
 
165
    logger.addHandler(syslogger)
 
166
 
 
167
    if debug:
 
168
        console = logging.StreamHandler()
 
169
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
 
170
                                               ' [%(process)d]:'
 
171
                                               ' %(levelname)s:'
 
172
                                               ' %(message)s'))
 
173
        logger.addHandler(console)
 
174
    logger.setLevel(level)
 
175
 
 
176
 
 
177
class PGPError(Exception):
 
178
    """Exception if encryption/decryption fails"""
 
179
    pass
 
180
 
 
181
 
 
182
class PGPEngine(object):
 
183
    """A simple class for OpenPGP symmetric encryption & decryption"""
 
184
 
 
185
    def __init__(self):
 
186
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
 
187
        self.gpg = "gpg"
 
188
        try:
 
189
            output = subprocess.check_output(["gpgconf"])
 
190
            for line in output.splitlines():
 
191
                name, text, path = line.split(b":")
 
192
                if name == "gpg":
 
193
                    self.gpg = path
 
194
                    break
 
195
        except OSError as e:
 
196
            if e.errno != errno.ENOENT:
 
197
                raise
 
198
        self.gnupgargs = ['--batch',
 
199
                          '--homedir', self.tempdir,
 
200
                          '--force-mdc',
 
201
                          '--quiet']
 
202
        # Only GPG version 1 has the --no-use-agent option.
 
203
        if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
 
204
            self.gnupgargs.append("--no-use-agent")
 
205
 
 
206
    def __enter__(self):
 
207
        return self
 
208
 
 
209
    def __exit__(self, exc_type, exc_value, traceback):
 
210
        self._cleanup()
 
211
        return False
 
212
 
 
213
    def __del__(self):
 
214
        self._cleanup()
 
215
 
 
216
    def _cleanup(self):
 
217
        if self.tempdir is not None:
 
218
            # Delete contents of tempdir
 
219
            for root, dirs, files in os.walk(self.tempdir,
 
220
                                             topdown=False):
 
221
                for filename in files:
 
222
                    os.remove(os.path.join(root, filename))
 
223
                for dirname in dirs:
 
224
                    os.rmdir(os.path.join(root, dirname))
 
225
            # Remove tempdir
 
226
            os.rmdir(self.tempdir)
 
227
            self.tempdir = None
 
228
 
 
229
    def password_encode(self, password):
 
230
        # Passphrase can not be empty and can not contain newlines or
 
231
        # NUL bytes.  So we prefix it and hex encode it.
 
232
        encoded = b"mandos" + binascii.hexlify(password)
 
233
        if len(encoded) > 2048:
 
234
            # GnuPG can't handle long passwords, so encode differently
 
235
            encoded = (b"mandos" + password.replace(b"\\", b"\\\\")
 
236
                       .replace(b"\n", b"\\n")
 
237
                       .replace(b"\0", b"\\x00"))
 
238
        return encoded
 
239
 
 
240
    def encrypt(self, data, password):
 
241
        passphrase = self.password_encode(password)
 
242
        with tempfile.NamedTemporaryFile(
 
243
                dir=self.tempdir) as passfile:
 
244
            passfile.write(passphrase)
 
245
            passfile.flush()
 
246
            proc = subprocess.Popen([self.gpg, '--symmetric',
 
247
                                     '--passphrase-file',
 
248
                                     passfile.name]
 
249
                                    + self.gnupgargs,
 
250
                                    stdin=subprocess.PIPE,
 
251
                                    stdout=subprocess.PIPE,
 
252
                                    stderr=subprocess.PIPE)
 
253
            ciphertext, err = proc.communicate(input=data)
 
254
        if proc.returncode != 0:
 
255
            raise PGPError(err)
 
256
        return ciphertext
 
257
 
 
258
    def decrypt(self, data, password):
 
259
        passphrase = self.password_encode(password)
 
260
        with tempfile.NamedTemporaryFile(
 
261
                dir=self.tempdir) as passfile:
 
262
            passfile.write(passphrase)
 
263
            passfile.flush()
 
264
            proc = subprocess.Popen([self.gpg, '--decrypt',
 
265
                                     '--passphrase-file',
 
266
                                     passfile.name]
 
267
                                    + self.gnupgargs,
 
268
                                    stdin=subprocess.PIPE,
 
269
                                    stdout=subprocess.PIPE,
 
270
                                    stderr=subprocess.PIPE)
 
271
            decrypted_plaintext, err = proc.communicate(input=data)
 
272
        if proc.returncode != 0:
 
273
            raise PGPError(err)
 
274
        return decrypted_plaintext
 
275
 
 
276
 
 
277
# Pretend that we have an Avahi module
 
278
class Avahi(object):
 
279
    """This isn't so much a class as it is a module-like namespace.
 
280
    It is instantiated once, and simulates having an Avahi module."""
 
281
    IF_UNSPEC = -1               # avahi-common/address.h
 
282
    PROTO_UNSPEC = -1            # avahi-common/address.h
 
283
    PROTO_INET = 0               # avahi-common/address.h
 
284
    PROTO_INET6 = 1              # avahi-common/address.h
 
285
    DBUS_NAME = "org.freedesktop.Avahi"
 
286
    DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
 
287
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
 
288
    DBUS_PATH_SERVER = "/"
 
289
 
 
290
    def string_array_to_txt_array(self, t):
 
291
        return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
 
292
                           for s in t), signature="ay")
 
293
    ENTRY_GROUP_ESTABLISHED = 2  # avahi-common/defs.h
 
294
    ENTRY_GROUP_COLLISION = 3    # avahi-common/defs.h
 
295
    ENTRY_GROUP_FAILURE = 4      # avahi-common/defs.h
 
296
    SERVER_INVALID = 0           # avahi-common/defs.h
 
297
    SERVER_REGISTERING = 1       # avahi-common/defs.h
 
298
    SERVER_RUNNING = 2           # avahi-common/defs.h
 
299
    SERVER_COLLISION = 3         # avahi-common/defs.h
 
300
    SERVER_FAILURE = 4           # avahi-common/defs.h
 
301
avahi = Avahi()
107
302
 
108
303
 
109
304
class AvahiError(Exception):
110
305
    def __init__(self, value, *args, **kwargs):
111
306
        self.value = value
112
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
113
 
    def __unicode__(self):
114
 
        return unicode(repr(self.value))
 
307
        return super(AvahiError, self).__init__(value, *args,
 
308
                                                **kwargs)
 
309
 
115
310
 
116
311
class AvahiServiceError(AvahiError):
117
312
    pass
118
313
 
 
314
 
119
315
class AvahiGroupError(AvahiError):
120
316
    pass
121
317
 
122
318
 
123
319
class AvahiService(object):
124
320
    """An Avahi (Zeroconf) service.
125
 
    
 
321
 
126
322
    Attributes:
127
323
    interface: integer; avahi.IF_UNSPEC or an interface index.
128
324
               Used to optionally bind to the specified interface.
129
325
    name: string; Example: 'Mandos'
130
326
    type: string; Example: '_mandos._tcp'.
131
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
 
327
     See <https://www.iana.org/assignments/service-names-port-numbers>
132
328
    port: integer; what port to announce
133
329
    TXT: list of strings; TXT record for the service
134
330
    domain: string; Domain to publish on, default to .local if empty.
140
336
    server: D-Bus Server
141
337
    bus: dbus.SystemBus()
142
338
    """
143
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
144
 
                 servicetype = None, port = None, TXT = None,
145
 
                 domain = "", host = "", max_renames = 32768,
146
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
339
 
 
340
    def __init__(self,
 
341
                 interface=avahi.IF_UNSPEC,
 
342
                 name=None,
 
343
                 servicetype=None,
 
344
                 port=None,
 
345
                 TXT=None,
 
346
                 domain="",
 
347
                 host="",
 
348
                 max_renames=32768,
 
349
                 protocol=avahi.PROTO_UNSPEC,
 
350
                 bus=None):
147
351
        self.interface = interface
148
352
        self.name = name
149
353
        self.type = servicetype
158
362
        self.server = None
159
363
        self.bus = bus
160
364
        self.entry_group_state_changed_match = None
161
 
    def rename(self):
 
365
 
 
366
    def rename(self, remove=True):
162
367
        """Derived from the Avahi example code"""
163
368
        if self.rename_count >= self.max_renames:
164
369
            logger.critical("No suitable Zeroconf service name found"
165
370
                            " after %i retries, exiting.",
166
371
                            self.rename_count)
167
372
            raise AvahiServiceError("Too many renames")
168
 
        self.name = unicode(self.server
169
 
                            .GetAlternativeServiceName(self.name))
 
373
        self.name = str(
 
374
            self.server.GetAlternativeServiceName(self.name))
 
375
        self.rename_count += 1
170
376
        logger.info("Changing Zeroconf service name to %r ...",
171
377
                    self.name)
172
 
        self.remove()
 
378
        if remove:
 
379
            self.remove()
173
380
        try:
174
381
            self.add()
175
382
        except dbus.exceptions.DBusException as error:
176
 
            logger.critical("DBusException: %s", error)
177
 
            self.cleanup()
178
 
            os._exit(1)
179
 
        self.rename_count += 1
 
383
            if (error.get_dbus_name()
 
384
                == "org.freedesktop.Avahi.CollisionError"):
 
385
                logger.info("Local Zeroconf service name collision.")
 
386
                return self.rename(remove=False)
 
387
            else:
 
388
                logger.critical("D-Bus Exception", exc_info=error)
 
389
                self.cleanup()
 
390
                os._exit(1)
 
391
 
180
392
    def remove(self):
181
393
        """Derived from the Avahi example code"""
182
394
        if self.entry_group_state_changed_match is not None:
184
396
            self.entry_group_state_changed_match = None
185
397
        if self.group is not None:
186
398
            self.group.Reset()
 
399
 
187
400
    def add(self):
188
401
        """Derived from the Avahi example code"""
189
402
        self.remove()
206
419
            dbus.UInt16(self.port),
207
420
            avahi.string_array_to_txt_array(self.TXT))
208
421
        self.group.Commit()
 
422
 
209
423
    def entry_group_state_changed(self, state, error):
210
424
        """Derived from the Avahi example code"""
211
425
        logger.debug("Avahi entry group state change: %i", state)
212
 
        
 
426
 
213
427
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
214
428
            logger.debug("Zeroconf service established.")
215
429
        elif state == avahi.ENTRY_GROUP_COLLISION:
217
431
            self.rename()
218
432
        elif state == avahi.ENTRY_GROUP_FAILURE:
219
433
            logger.critical("Avahi: Error in group state changed %s",
220
 
                            unicode(error))
221
 
            raise AvahiGroupError("State changed: %s"
222
 
                                  % unicode(error))
 
434
                            str(error))
 
435
            raise AvahiGroupError("State changed: {!s}".format(error))
 
436
 
223
437
    def cleanup(self):
224
438
        """Derived from the Avahi example code"""
225
439
        if self.group is not None:
226
440
            try:
227
441
                self.group.Free()
228
442
            except (dbus.exceptions.UnknownMethodException,
229
 
                    dbus.exceptions.DBusException) as e:
 
443
                    dbus.exceptions.DBusException):
230
444
                pass
231
445
            self.group = None
232
446
        self.remove()
 
447
 
233
448
    def server_state_changed(self, state, error=None):
234
449
        """Derived from the Avahi example code"""
235
450
        logger.debug("Avahi server state change: %i", state)
236
 
        bad_states = { avahi.SERVER_INVALID:
237
 
                           "Zeroconf server invalid",
238
 
                       avahi.SERVER_REGISTERING: None,
239
 
                       avahi.SERVER_COLLISION:
240
 
                           "Zeroconf server name collision",
241
 
                       avahi.SERVER_FAILURE:
242
 
                           "Zeroconf server failure" }
 
451
        bad_states = {
 
452
            avahi.SERVER_INVALID: "Zeroconf server invalid",
 
453
            avahi.SERVER_REGISTERING: None,
 
454
            avahi.SERVER_COLLISION: "Zeroconf server name collision",
 
455
            avahi.SERVER_FAILURE: "Zeroconf server failure",
 
456
        }
243
457
        if state in bad_states:
244
458
            if bad_states[state] is not None:
245
459
                if error is None:
248
462
                    logger.error(bad_states[state] + ": %r", error)
249
463
            self.cleanup()
250
464
        elif state == avahi.SERVER_RUNNING:
251
 
            self.add()
 
465
            try:
 
466
                self.add()
 
467
            except dbus.exceptions.DBusException as error:
 
468
                if (error.get_dbus_name()
 
469
                    == "org.freedesktop.Avahi.CollisionError"):
 
470
                    logger.info("Local Zeroconf service name"
 
471
                                " collision.")
 
472
                    return self.rename(remove=False)
 
473
                else:
 
474
                    logger.critical("D-Bus Exception", exc_info=error)
 
475
                    self.cleanup()
 
476
                    os._exit(1)
252
477
        else:
253
478
            if error is None:
254
479
                logger.debug("Unknown state: %r", state)
255
480
            else:
256
481
                logger.debug("Unknown state: %r: %r", state, error)
 
482
 
257
483
    def activate(self):
258
484
        """Derived from the Avahi example code"""
259
485
        if self.server is None:
263
489
                                    follow_name_owner_changes=True),
264
490
                avahi.DBUS_INTERFACE_SERVER)
265
491
        self.server.connect_to_signal("StateChanged",
266
 
                                 self.server_state_changed)
 
492
                                      self.server_state_changed)
267
493
        self.server_state_changed(self.server.GetState())
268
494
 
 
495
 
269
496
class AvahiServiceToSyslog(AvahiService):
270
 
    def rename(self):
 
497
    def rename(self, *args, **kwargs):
271
498
        """Add the new name to the syslog messages"""
272
 
        ret = AvahiService.rename(self)
273
 
        syslogger.setFormatter(logging.Formatter
274
 
                               ('Mandos (%s) [%%(process)d]:'
275
 
                                ' %%(levelname)s: %%(message)s'
276
 
                                % self.name))
 
499
        ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
 
500
        syslogger.setFormatter(logging.Formatter(
 
501
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
 
502
            .format(self.name)))
277
503
        return ret
278
504
 
279
 
def _timedelta_to_milliseconds(td):
280
 
    "Convert a datetime.timedelta() to milliseconds"
281
 
    return ((td.days * 24 * 60 * 60 * 1000)
282
 
            + (td.seconds * 1000)
283
 
            + (td.microseconds // 1000))
284
 
        
 
505
 
 
506
# Pretend that we have a GnuTLS module
 
507
class GnuTLS(object):
 
508
    """This isn't so much a class as it is a module-like namespace.
 
509
    It is instantiated once, and simulates having a GnuTLS module."""
 
510
 
 
511
    library = ctypes.util.find_library("gnutls")
 
512
    if library is None:
 
513
        library = ctypes.util.find_library("gnutls-deb0")
 
514
    _library = ctypes.cdll.LoadLibrary(library)
 
515
    del library
 
516
    _need_version = b"3.3.0"
 
517
 
 
518
    def __init__(self):
 
519
        # Need to use "self" here, since this method is called before
 
520
        # the assignment to the "gnutls" global variable happens.
 
521
        if self.check_version(self._need_version) is None:
 
522
            raise self.Error("Needs GnuTLS {} or later"
 
523
                             .format(self._need_version))
 
524
 
 
525
    # Unless otherwise indicated, the constants and types below are
 
526
    # all from the gnutls/gnutls.h C header file.
 
527
 
 
528
    # Constants
 
529
    E_SUCCESS = 0
 
530
    E_INTERRUPTED = -52
 
531
    E_AGAIN = -28
 
532
    CRT_OPENPGP = 2
 
533
    CLIENT = 2
 
534
    SHUT_RDWR = 0
 
535
    CRD_CERTIFICATE = 1
 
536
    E_NO_CERTIFICATE_FOUND = -49
 
537
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
 
538
 
 
539
    # Types
 
540
    class session_int(ctypes.Structure):
 
541
        _fields_ = []
 
542
    session_t = ctypes.POINTER(session_int)
 
543
 
 
544
    class certificate_credentials_st(ctypes.Structure):
 
545
        _fields_ = []
 
546
    certificate_credentials_t = ctypes.POINTER(
 
547
        certificate_credentials_st)
 
548
    certificate_type_t = ctypes.c_int
 
549
 
 
550
    class datum_t(ctypes.Structure):
 
551
        _fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
 
552
                    ('size', ctypes.c_uint)]
 
553
 
 
554
    class openpgp_crt_int(ctypes.Structure):
 
555
        _fields_ = []
 
556
    openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
 
557
    openpgp_crt_fmt_t = ctypes.c_int  # gnutls/openpgp.h
 
558
    log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
 
559
    credentials_type_t = ctypes.c_int
 
560
    transport_ptr_t = ctypes.c_void_p
 
561
    close_request_t = ctypes.c_int
 
562
 
 
563
    # Exceptions
 
564
    class Error(Exception):
 
565
        # We need to use the class name "GnuTLS" here, since this
 
566
        # exception might be raised from within GnuTLS.__init__,
 
567
        # which is called before the assignment to the "gnutls"
 
568
        # global variable has happened.
 
569
        def __init__(self, message=None, code=None, args=()):
 
570
            # Default usage is by a message string, but if a return
 
571
            # code is passed, convert it to a string with
 
572
            # gnutls.strerror()
 
573
            self.code = code
 
574
            if message is None and code is not None:
 
575
                message = GnuTLS.strerror(code)
 
576
            return super(GnuTLS.Error, self).__init__(
 
577
                message, *args)
 
578
 
 
579
    class CertificateSecurityError(Error):
 
580
        pass
 
581
 
 
582
    # Classes
 
583
    class Credentials(object):
 
584
        def __init__(self):
 
585
            self._c_object = gnutls.certificate_credentials_t()
 
586
            gnutls.certificate_allocate_credentials(
 
587
                ctypes.byref(self._c_object))
 
588
            self.type = gnutls.CRD_CERTIFICATE
 
589
 
 
590
        def __del__(self):
 
591
            gnutls.certificate_free_credentials(self._c_object)
 
592
 
 
593
    class ClientSession(object):
 
594
        def __init__(self, socket, credentials=None):
 
595
            self._c_object = gnutls.session_t()
 
596
            gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
 
597
            gnutls.set_default_priority(self._c_object)
 
598
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
 
599
            gnutls.handshake_set_private_extensions(self._c_object,
 
600
                                                    True)
 
601
            self.socket = socket
 
602
            if credentials is None:
 
603
                credentials = gnutls.Credentials()
 
604
            gnutls.credentials_set(self._c_object, credentials.type,
 
605
                                   ctypes.cast(credentials._c_object,
 
606
                                               ctypes.c_void_p))
 
607
            self.credentials = credentials
 
608
 
 
609
        def __del__(self):
 
610
            gnutls.deinit(self._c_object)
 
611
 
 
612
        def handshake(self):
 
613
            return gnutls.handshake(self._c_object)
 
614
 
 
615
        def send(self, data):
 
616
            data = bytes(data)
 
617
            data_len = len(data)
 
618
            while data_len > 0:
 
619
                data_len -= gnutls.record_send(self._c_object,
 
620
                                               data[-data_len:],
 
621
                                               data_len)
 
622
 
 
623
        def bye(self):
 
624
            return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
 
625
 
 
626
    # Error handling functions
 
627
    def _error_code(result):
 
628
        """A function to raise exceptions on errors, suitable
 
629
        for the 'restype' attribute on ctypes functions"""
 
630
        if result >= 0:
 
631
            return result
 
632
        if result == gnutls.E_NO_CERTIFICATE_FOUND:
 
633
            raise gnutls.CertificateSecurityError(code=result)
 
634
        raise gnutls.Error(code=result)
 
635
 
 
636
    def _retry_on_error(result, func, arguments):
 
637
        """A function to retry on some errors, suitable
 
638
        for the 'errcheck' attribute on ctypes functions"""
 
639
        while result < 0:
 
640
            if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
 
641
                return _error_code(result)
 
642
            result = func(*arguments)
 
643
        return result
 
644
 
 
645
    # Unless otherwise indicated, the function declarations below are
 
646
    # all from the gnutls/gnutls.h C header file.
 
647
 
 
648
    # Functions
 
649
    priority_set_direct = _library.gnutls_priority_set_direct
 
650
    priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
 
651
                                    ctypes.POINTER(ctypes.c_char_p)]
 
652
    priority_set_direct.restype = _error_code
 
653
 
 
654
    init = _library.gnutls_init
 
655
    init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
 
656
    init.restype = _error_code
 
657
 
 
658
    set_default_priority = _library.gnutls_set_default_priority
 
659
    set_default_priority.argtypes = [session_t]
 
660
    set_default_priority.restype = _error_code
 
661
 
 
662
    record_send = _library.gnutls_record_send
 
663
    record_send.argtypes = [session_t, ctypes.c_void_p,
 
664
                            ctypes.c_size_t]
 
665
    record_send.restype = ctypes.c_ssize_t
 
666
    record_send.errcheck = _retry_on_error
 
667
 
 
668
    certificate_allocate_credentials = (
 
669
        _library.gnutls_certificate_allocate_credentials)
 
670
    certificate_allocate_credentials.argtypes = [
 
671
        ctypes.POINTER(certificate_credentials_t)]
 
672
    certificate_allocate_credentials.restype = _error_code
 
673
 
 
674
    certificate_free_credentials = (
 
675
        _library.gnutls_certificate_free_credentials)
 
676
    certificate_free_credentials.argtypes = [
 
677
        certificate_credentials_t]
 
678
    certificate_free_credentials.restype = None
 
679
 
 
680
    handshake_set_private_extensions = (
 
681
        _library.gnutls_handshake_set_private_extensions)
 
682
    handshake_set_private_extensions.argtypes = [session_t,
 
683
                                                 ctypes.c_int]
 
684
    handshake_set_private_extensions.restype = None
 
685
 
 
686
    credentials_set = _library.gnutls_credentials_set
 
687
    credentials_set.argtypes = [session_t, credentials_type_t,
 
688
                                ctypes.c_void_p]
 
689
    credentials_set.restype = _error_code
 
690
 
 
691
    strerror = _library.gnutls_strerror
 
692
    strerror.argtypes = [ctypes.c_int]
 
693
    strerror.restype = ctypes.c_char_p
 
694
 
 
695
    certificate_type_get = _library.gnutls_certificate_type_get
 
696
    certificate_type_get.argtypes = [session_t]
 
697
    certificate_type_get.restype = _error_code
 
698
 
 
699
    certificate_get_peers = _library.gnutls_certificate_get_peers
 
700
    certificate_get_peers.argtypes = [session_t,
 
701
                                      ctypes.POINTER(ctypes.c_uint)]
 
702
    certificate_get_peers.restype = ctypes.POINTER(datum_t)
 
703
 
 
704
    global_set_log_level = _library.gnutls_global_set_log_level
 
705
    global_set_log_level.argtypes = [ctypes.c_int]
 
706
    global_set_log_level.restype = None
 
707
 
 
708
    global_set_log_function = _library.gnutls_global_set_log_function
 
709
    global_set_log_function.argtypes = [log_func]
 
710
    global_set_log_function.restype = None
 
711
 
 
712
    deinit = _library.gnutls_deinit
 
713
    deinit.argtypes = [session_t]
 
714
    deinit.restype = None
 
715
 
 
716
    handshake = _library.gnutls_handshake
 
717
    handshake.argtypes = [session_t]
 
718
    handshake.restype = _error_code
 
719
    handshake.errcheck = _retry_on_error
 
720
 
 
721
    transport_set_ptr = _library.gnutls_transport_set_ptr
 
722
    transport_set_ptr.argtypes = [session_t, transport_ptr_t]
 
723
    transport_set_ptr.restype = None
 
724
 
 
725
    bye = _library.gnutls_bye
 
726
    bye.argtypes = [session_t, close_request_t]
 
727
    bye.restype = _error_code
 
728
    bye.errcheck = _retry_on_error
 
729
 
 
730
    check_version = _library.gnutls_check_version
 
731
    check_version.argtypes = [ctypes.c_char_p]
 
732
    check_version.restype = ctypes.c_char_p
 
733
 
 
734
    # All the function declarations below are from gnutls/openpgp.h
 
735
 
 
736
    openpgp_crt_init = _library.gnutls_openpgp_crt_init
 
737
    openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
 
738
    openpgp_crt_init.restype = _error_code
 
739
 
 
740
    openpgp_crt_import = _library.gnutls_openpgp_crt_import
 
741
    openpgp_crt_import.argtypes = [openpgp_crt_t,
 
742
                                   ctypes.POINTER(datum_t),
 
743
                                   openpgp_crt_fmt_t]
 
744
    openpgp_crt_import.restype = _error_code
 
745
 
 
746
    openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
 
747
    openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
 
748
                                        ctypes.POINTER(ctypes.c_uint)]
 
749
    openpgp_crt_verify_self.restype = _error_code
 
750
 
 
751
    openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
 
752
    openpgp_crt_deinit.argtypes = [openpgp_crt_t]
 
753
    openpgp_crt_deinit.restype = None
 
754
 
 
755
    openpgp_crt_get_fingerprint = (
 
756
        _library.gnutls_openpgp_crt_get_fingerprint)
 
757
    openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
 
758
                                            ctypes.c_void_p,
 
759
                                            ctypes.POINTER(
 
760
                                                ctypes.c_size_t)]
 
761
    openpgp_crt_get_fingerprint.restype = _error_code
 
762
 
 
763
    # Remove non-public functions
 
764
    del _error_code, _retry_on_error
 
765
# Create the global "gnutls" object, simulating a module
 
766
gnutls = GnuTLS()
 
767
 
 
768
 
 
769
def call_pipe(connection,       # : multiprocessing.Connection
 
770
              func, *args, **kwargs):
 
771
    """This function is meant to be called by multiprocessing.Process
 
772
 
 
773
    This function runs func(*args, **kwargs), and writes the resulting
 
774
    return value on the provided multiprocessing.Connection.
 
775
    """
 
776
    connection.send(func(*args, **kwargs))
 
777
    connection.close()
 
778
 
 
779
 
285
780
class Client(object):
286
781
    """A representation of a client host served by this server.
287
 
    
 
782
 
288
783
    Attributes:
289
 
    _approved:   bool(); 'None' if not yet approved/disapproved
 
784
    approved:   bool(); 'None' if not yet approved/disapproved
290
785
    approval_delay: datetime.timedelta(); Time to wait for approval
291
786
    approval_duration: datetime.timedelta(); Duration of one approval
292
787
    checker:    subprocess.Popen(); a running checker process used
293
788
                                    to see if the client lives.
294
789
                                    'None' if no process is running.
295
 
    checker_callback_tag: a gobject event source tag, or None
 
790
    checker_callback_tag: a GLib event source tag, or None
296
791
    checker_command: string; External command which is run to check
297
792
                     if client lives.  %() expansions are done at
298
793
                     runtime with vars(self) as dict, so that for
299
794
                     instance %(name)s can be used in the command.
300
 
    checker_initiator_tag: a gobject event source tag, or None
 
795
    checker_initiator_tag: a GLib event source tag, or None
301
796
    created:    datetime.datetime(); (UTC) object creation
302
797
    client_structure: Object describing what attributes a client has
303
798
                      and is used for storing the client at exit
304
799
    current_checker_command: string; current running checker_command
305
 
    disable_initiator_tag: a gobject event source tag, or None
 
800
    disable_initiator_tag: a GLib event source tag, or None
306
801
    enabled:    bool()
307
802
    fingerprint: string (40 or 32 hexadecimal digits); used to
308
803
                 uniquely identify the client
310
805
    interval:   datetime.timedelta(); How often to start a new checker
311
806
    last_approval_request: datetime.datetime(); (UTC) or None
312
807
    last_checked_ok: datetime.datetime(); (UTC) or None
313
 
    last_checker_status: integer between 0 and 255 reflecting exit status
314
 
                         of last checker. -1 reflect crashed checker,
315
 
                         or None.
316
 
    last_enabled: datetime.datetime(); (UTC)
 
808
    last_checker_status: integer between 0 and 255 reflecting exit
 
809
                         status of last checker. -1 reflects crashed
 
810
                         checker, -2 means no checker completed yet.
 
811
    last_checker_signal: The signal which killed the last checker, if
 
812
                         last_checker_status is -1
 
813
    last_enabled: datetime.datetime(); (UTC) or None
317
814
    name:       string; from the config file, used in log messages and
318
815
                        D-Bus identifiers
319
816
    secret:     bytestring; sent verbatim (over TLS) to client
320
817
    timeout:    datetime.timedelta(); How long from last_checked_ok
321
818
                                      until this client is disabled
322
 
    extended_timeout:   extra long timeout when password has been sent
 
819
    extended_timeout:   extra long timeout when secret has been sent
323
820
    runtime_expansions: Allowed attributes for runtime expansion.
324
821
    expires:    datetime.datetime(); time (UTC) when a client will be
325
822
                disabled, or None
 
823
    server_settings: The server_settings dict from main()
326
824
    """
327
 
    
 
825
 
328
826
    runtime_expansions = ("approval_delay", "approval_duration",
329
 
                          "created", "enabled", "fingerprint",
330
 
                          "host", "interval", "last_checked_ok",
 
827
                          "created", "enabled", "expires",
 
828
                          "fingerprint", "host", "interval",
 
829
                          "last_approval_request", "last_checked_ok",
331
830
                          "last_enabled", "name", "timeout")
332
 
    
333
 
    def timeout_milliseconds(self):
334
 
        "Return the 'timeout' attribute in milliseconds"
335
 
        return _timedelta_to_milliseconds(self.timeout)
336
 
    
337
 
    def extended_timeout_milliseconds(self):
338
 
        "Return the 'extended_timeout' attribute in milliseconds"
339
 
        return _timedelta_to_milliseconds(self.extended_timeout)
340
 
    
341
 
    def interval_milliseconds(self):
342
 
        "Return the 'interval' attribute in milliseconds"
343
 
        return _timedelta_to_milliseconds(self.interval)
344
 
    
345
 
    def approval_delay_milliseconds(self):
346
 
        return _timedelta_to_milliseconds(self.approval_delay)
347
 
    
348
 
    def __init__(self, name = None, config=None):
349
 
        """Note: the 'checker' key in 'config' sets the
350
 
        'checker_command' attribute and *not* the 'checker'
351
 
        attribute."""
 
831
    client_defaults = {
 
832
        "timeout": "PT5M",
 
833
        "extended_timeout": "PT15M",
 
834
        "interval": "PT2M",
 
835
        "checker": "fping -q -- %%(host)s",
 
836
        "host": "",
 
837
        "approval_delay": "PT0S",
 
838
        "approval_duration": "PT1S",
 
839
        "approved_by_default": "True",
 
840
        "enabled": "True",
 
841
    }
 
842
 
 
843
    @staticmethod
 
844
    def config_parser(config):
 
845
        """Construct a new dict of client settings of this form:
 
846
        { client_name: {setting_name: value, ...}, ...}
 
847
        with exceptions for any special settings as defined above.
 
848
        NOTE: Must be a pure function. Must return the same result
 
849
        value given the same arguments.
 
850
        """
 
851
        settings = {}
 
852
        for client_name in config.sections():
 
853
            section = dict(config.items(client_name))
 
854
            client = settings[client_name] = {}
 
855
 
 
856
            client["host"] = section["host"]
 
857
            # Reformat values from string types to Python types
 
858
            client["approved_by_default"] = config.getboolean(
 
859
                client_name, "approved_by_default")
 
860
            client["enabled"] = config.getboolean(client_name,
 
861
                                                  "enabled")
 
862
 
 
863
            # Uppercase and remove spaces from fingerprint for later
 
864
            # comparison purposes with return value from the
 
865
            # fingerprint() function
 
866
            client["fingerprint"] = (section["fingerprint"].upper()
 
867
                                     .replace(" ", ""))
 
868
            if "secret" in section:
 
869
                client["secret"] = codecs.decode(section["secret"]
 
870
                                                 .encode("utf-8"),
 
871
                                                 "base64")
 
872
            elif "secfile" in section:
 
873
                with open(os.path.expanduser(os.path.expandvars
 
874
                                             (section["secfile"])),
 
875
                          "rb") as secfile:
 
876
                    client["secret"] = secfile.read()
 
877
            else:
 
878
                raise TypeError("No secret or secfile for section {}"
 
879
                                .format(section))
 
880
            client["timeout"] = string_to_delta(section["timeout"])
 
881
            client["extended_timeout"] = string_to_delta(
 
882
                section["extended_timeout"])
 
883
            client["interval"] = string_to_delta(section["interval"])
 
884
            client["approval_delay"] = string_to_delta(
 
885
                section["approval_delay"])
 
886
            client["approval_duration"] = string_to_delta(
 
887
                section["approval_duration"])
 
888
            client["checker_command"] = section["checker"]
 
889
            client["last_approval_request"] = None
 
890
            client["last_checked_ok"] = None
 
891
            client["last_checker_status"] = -2
 
892
 
 
893
        return settings
 
894
 
 
895
    def __init__(self, settings, name=None, server_settings=None):
352
896
        self.name = name
353
 
        if config is None:
354
 
            config = {}
 
897
        if server_settings is None:
 
898
            server_settings = {}
 
899
        self.server_settings = server_settings
 
900
        # adding all client settings
 
901
        for setting, value in settings.items():
 
902
            setattr(self, setting, value)
 
903
 
 
904
        if self.enabled:
 
905
            if not hasattr(self, "last_enabled"):
 
906
                self.last_enabled = datetime.datetime.utcnow()
 
907
            if not hasattr(self, "expires"):
 
908
                self.expires = (datetime.datetime.utcnow()
 
909
                                + self.timeout)
 
910
        else:
 
911
            self.last_enabled = None
 
912
            self.expires = None
 
913
 
355
914
        logger.debug("Creating client %r", self.name)
356
 
        # Uppercase and remove spaces from fingerprint for later
357
 
        # comparison purposes with return value from the fingerprint()
358
 
        # function
359
 
        self.fingerprint = (config["fingerprint"].upper()
360
 
                            .replace(" ", ""))
361
915
        logger.debug("  Fingerprint: %s", self.fingerprint)
362
 
        if "secret" in config:
363
 
            self.secret = config["secret"].decode("base64")
364
 
        elif "secfile" in config:
365
 
            with open(os.path.expanduser(os.path.expandvars
366
 
                                         (config["secfile"])),
367
 
                      "rb") as secfile:
368
 
                self.secret = secfile.read()
369
 
        else:
370
 
            raise TypeError("No secret or secfile for client %s"
371
 
                            % self.name)
372
 
        self.host = config.get("host", "")
373
 
        self.created = datetime.datetime.utcnow()
374
 
        self.enabled = True
375
 
        self.last_approval_request = None
376
 
        self.last_enabled = datetime.datetime.utcnow()
377
 
        self.last_checked_ok = None
378
 
        self.last_checker_status = None
379
 
        self.timeout = string_to_delta(config["timeout"])
380
 
        self.extended_timeout = string_to_delta(config
381
 
                                                ["extended_timeout"])
382
 
        self.interval = string_to_delta(config["interval"])
 
916
        self.created = settings.get("created",
 
917
                                    datetime.datetime.utcnow())
 
918
 
 
919
        # attributes specific for this server instance
383
920
        self.checker = None
384
921
        self.checker_initiator_tag = None
385
922
        self.disable_initiator_tag = None
386
 
        self.expires = datetime.datetime.utcnow() + self.timeout
387
923
        self.checker_callback_tag = None
388
 
        self.checker_command = config["checker"]
389
924
        self.current_checker_command = None
390
 
        self._approved = None
391
 
        self.approved_by_default = config.get("approved_by_default",
392
 
                                              True)
 
925
        self.approved = None
393
926
        self.approvals_pending = 0
394
 
        self.approval_delay = string_to_delta(
395
 
            config["approval_delay"])
396
 
        self.approval_duration = string_to_delta(
397
 
            config["approval_duration"])
398
 
        self.changedstate = (multiprocessing_manager
399
 
                             .Condition(multiprocessing_manager
400
 
                                        .Lock()))
401
 
        self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]
 
927
        self.changedstate = multiprocessing_manager.Condition(
 
928
            multiprocessing_manager.Lock())
 
929
        self.client_structure = [attr
 
930
                                 for attr in self.__dict__.keys()
 
931
                                 if not attr.startswith("_")]
402
932
        self.client_structure.append("client_structure")
403
933
 
404
 
 
405
 
        for name, t in inspect.getmembers(type(self),
406
 
                                          lambda obj: isinstance(obj, property)):
 
934
        for name, t in inspect.getmembers(
 
935
                type(self), lambda obj: isinstance(obj, property)):
407
936
            if not name.startswith("_"):
408
937
                self.client_structure.append(name)
409
 
    
 
938
 
410
939
    # Send notice to process children that client state has changed
411
940
    def send_changedstate(self):
412
941
        with self.changedstate:
413
942
            self.changedstate.notify_all()
414
 
    
 
943
 
415
944
    def enable(self):
416
945
        """Start this client's checker and timeout hooks"""
417
946
        if getattr(self, "enabled", False):
418
947
            # Already enabled
419
948
            return
420
 
        self.send_changedstate()
421
949
        self.expires = datetime.datetime.utcnow() + self.timeout
422
950
        self.enabled = True
423
951
        self.last_enabled = datetime.datetime.utcnow()
424
952
        self.init_checker()
425
 
    
 
953
        self.send_changedstate()
 
954
 
426
955
    def disable(self, quiet=True):
427
956
        """Disable this client."""
428
957
        if not getattr(self, "enabled", False):
429
958
            return False
430
959
        if not quiet:
431
 
            self.send_changedstate()
432
 
        if not quiet:
433
960
            logger.info("Disabling client %s", self.name)
434
 
        if getattr(self, "disable_initiator_tag", False):
435
 
            gobject.source_remove(self.disable_initiator_tag)
 
961
        if getattr(self, "disable_initiator_tag", None) is not None:
 
962
            GLib.source_remove(self.disable_initiator_tag)
436
963
            self.disable_initiator_tag = None
437
964
        self.expires = None
438
 
        if getattr(self, "checker_initiator_tag", False):
439
 
            gobject.source_remove(self.checker_initiator_tag)
 
965
        if getattr(self, "checker_initiator_tag", None) is not None:
 
966
            GLib.source_remove(self.checker_initiator_tag)
440
967
            self.checker_initiator_tag = None
441
968
        self.stop_checker()
442
969
        self.enabled = False
443
 
        # Do not run this again if called by a gobject.timeout_add
 
970
        if not quiet:
 
971
            self.send_changedstate()
 
972
        # Do not run this again if called by a GLib.timeout_add
444
973
        return False
445
 
    
 
974
 
446
975
    def __del__(self):
447
976
        self.disable()
448
977
 
449
978
    def init_checker(self):
450
979
        # Schedule a new checker to be started an 'interval' from now,
451
980
        # and every interval from then on.
452
 
        self.checker_initiator_tag = (gobject.timeout_add
453
 
                                      (self.interval_milliseconds(),
454
 
                                       self.start_checker))
 
981
        if self.checker_initiator_tag is not None:
 
982
            GLib.source_remove(self.checker_initiator_tag)
 
983
        self.checker_initiator_tag = GLib.timeout_add(
 
984
            int(self.interval.total_seconds() * 1000),
 
985
            self.start_checker)
455
986
        # Schedule a disable() when 'timeout' has passed
456
 
        self.disable_initiator_tag = (gobject.timeout_add
457
 
                                   (self.timeout_milliseconds(),
458
 
                                    self.disable))
 
987
        if self.disable_initiator_tag is not None:
 
988
            GLib.source_remove(self.disable_initiator_tag)
 
989
        self.disable_initiator_tag = GLib.timeout_add(
 
990
            int(self.timeout.total_seconds() * 1000), self.disable)
459
991
        # Also start a new checker *right now*.
460
992
        self.start_checker()
461
993
 
462
 
        
463
 
    def checker_callback(self, pid, condition, command):
 
994
    def checker_callback(self, source, condition, connection,
 
995
                         command):
464
996
        """The checker has completed, so take appropriate actions."""
465
997
        self.checker_callback_tag = None
466
998
        self.checker = None
467
 
        if os.WIFEXITED(condition):
468
 
            self.last_checker_status =  os.WEXITSTATUS(condition)
 
999
        # Read return code from connection (see call_pipe)
 
1000
        returncode = connection.recv()
 
1001
        connection.close()
 
1002
 
 
1003
        if returncode >= 0:
 
1004
            self.last_checker_status = returncode
 
1005
            self.last_checker_signal = None
469
1006
            if self.last_checker_status == 0:
470
1007
                logger.info("Checker for %(name)s succeeded",
471
1008
                            vars(self))
472
1009
                self.checked_ok()
473
1010
            else:
474
 
                logger.info("Checker for %(name)s failed",
475
 
                            vars(self))
 
1011
                logger.info("Checker for %(name)s failed", vars(self))
476
1012
        else:
477
1013
            self.last_checker_status = -1
 
1014
            self.last_checker_signal = -returncode
478
1015
            logger.warning("Checker for %(name)s crashed?",
479
1016
                           vars(self))
480
 
    
481
 
    def checked_ok(self, timeout=None):
482
 
        """Bump up the timeout for this client.
483
 
        
484
 
        This should only be called when the client has been seen,
485
 
        alive and well.
486
 
        """
 
1017
        return False
 
1018
 
 
1019
    def checked_ok(self):
 
1020
        """Assert that the client has been seen, alive and well."""
 
1021
        self.last_checked_ok = datetime.datetime.utcnow()
 
1022
        self.last_checker_status = 0
 
1023
        self.last_checker_signal = None
 
1024
        self.bump_timeout()
 
1025
 
 
1026
    def bump_timeout(self, timeout=None):
 
1027
        """Bump up the timeout for this client."""
487
1028
        if timeout is None:
488
1029
            timeout = self.timeout
489
 
        self.last_checked_ok = datetime.datetime.utcnow()
490
1030
        if self.disable_initiator_tag is not None:
491
 
            gobject.source_remove(self.disable_initiator_tag)
 
1031
            GLib.source_remove(self.disable_initiator_tag)
 
1032
            self.disable_initiator_tag = None
492
1033
        if getattr(self, "enabled", False):
493
 
            self.disable_initiator_tag = (gobject.timeout_add
494
 
                                          (_timedelta_to_milliseconds
495
 
                                           (timeout), self.disable))
 
1034
            self.disable_initiator_tag = GLib.timeout_add(
 
1035
                int(timeout.total_seconds() * 1000), self.disable)
496
1036
            self.expires = datetime.datetime.utcnow() + timeout
497
 
    
 
1037
 
498
1038
    def need_approval(self):
499
1039
        self.last_approval_request = datetime.datetime.utcnow()
500
 
    
 
1040
 
501
1041
    def start_checker(self):
502
1042
        """Start a new checker subprocess if one is not running.
503
 
        
 
1043
 
504
1044
        If a checker already exists, leave it running and do
505
1045
        nothing."""
506
1046
        # The reason for not killing a running checker is that if we
507
 
        # did that, then if a checker (for some reason) started
508
 
        # running slowly and taking more than 'interval' time, the
509
 
        # client would inevitably timeout, since no checker would get
510
 
        # a chance to run to completion.  If we instead leave running
 
1047
        # did that, and if a checker (for some reason) started running
 
1048
        # slowly and taking more than 'interval' time, then the client
 
1049
        # would inevitably timeout, since no checker would get a
 
1050
        # chance to run to completion.  If we instead leave running
511
1051
        # checkers alone, the checker would have to take more time
512
1052
        # than 'timeout' for the client to be disabled, which is as it
513
1053
        # should be.
514
 
        
515
 
        # If a checker exists, make sure it is not a zombie
516
 
        try:
517
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
518
 
        except (AttributeError, OSError) as error:
519
 
            if (isinstance(error, OSError)
520
 
                and error.errno != errno.ECHILD):
521
 
                raise error
522
 
        else:
523
 
            if pid:
524
 
                logger.warning("Checker was a zombie")
525
 
                gobject.source_remove(self.checker_callback_tag)
526
 
                self.checker_callback(pid, status,
527
 
                                      self.current_checker_command)
 
1054
 
 
1055
        if self.checker is not None and not self.checker.is_alive():
 
1056
            logger.warning("Checker was not alive; joining")
 
1057
            self.checker.join()
 
1058
            self.checker = None
528
1059
        # Start a new checker if needed
529
1060
        if self.checker is None:
 
1061
            # Escape attributes for the shell
 
1062
            escaped_attrs = {
 
1063
                attr: re.escape(str(getattr(self, attr)))
 
1064
                for attr in self.runtime_expansions}
530
1065
            try:
531
 
                # In case checker_command has exactly one % operator
532
 
                command = self.checker_command % self.host
533
 
            except TypeError:
534
 
                # Escape attributes for the shell
535
 
                escaped_attrs = dict(
536
 
                    (attr,
537
 
                     re.escape(unicode(str(getattr(self, attr, "")),
538
 
                                       errors=
539
 
                                       'replace')))
540
 
                    for attr in
541
 
                    self.runtime_expansions)
542
 
                
543
 
                try:
544
 
                    command = self.checker_command % escaped_attrs
545
 
                except TypeError as error:
546
 
                    logger.error('Could not format string "%s":'
547
 
                                 ' %s', self.checker_command, error)
548
 
                    return True # Try again later
 
1066
                command = self.checker_command % escaped_attrs
 
1067
            except TypeError as error:
 
1068
                logger.error('Could not format string "%s"',
 
1069
                             self.checker_command,
 
1070
                             exc_info=error)
 
1071
                return True     # Try again later
549
1072
            self.current_checker_command = command
550
 
            try:
551
 
                logger.info("Starting checker %r for %s",
552
 
                            command, self.name)
553
 
                # We don't need to redirect stdout and stderr, since
554
 
                # in normal mode, that is already done by daemon(),
555
 
                # and in debug mode we don't want to.  (Stdin is
556
 
                # always replaced by /dev/null.)
557
 
                self.checker = subprocess.Popen(command,
558
 
                                                close_fds=True,
559
 
                                                shell=True, cwd="/")
560
 
                self.checker_callback_tag = (gobject.child_watch_add
561
 
                                             (self.checker.pid,
562
 
                                              self.checker_callback,
563
 
                                              data=command))
564
 
                # The checker may have completed before the gobject
565
 
                # watch was added.  Check for this.
566
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
567
 
                if pid:
568
 
                    gobject.source_remove(self.checker_callback_tag)
569
 
                    self.checker_callback(pid, status, command)
570
 
            except OSError as error:
571
 
                logger.error("Failed to start subprocess: %s",
572
 
                             error)
573
 
        # Re-run this periodically if run by gobject.timeout_add
 
1073
            logger.info("Starting checker %r for %s", command,
 
1074
                        self.name)
 
1075
            # We don't need to redirect stdout and stderr, since
 
1076
            # in normal mode, that is already done by daemon(),
 
1077
            # and in debug mode we don't want to.  (Stdin is
 
1078
            # always replaced by /dev/null.)
 
1079
            # The exception is when not debugging but nevertheless
 
1080
            # running in the foreground; use the previously
 
1081
            # created wnull.
 
1082
            popen_args = {"close_fds": True,
 
1083
                          "shell": True,
 
1084
                          "cwd": "/"}
 
1085
            if (not self.server_settings["debug"]
 
1086
                and self.server_settings["foreground"]):
 
1087
                popen_args.update({"stdout": wnull,
 
1088
                                   "stderr": wnull})
 
1089
            pipe = multiprocessing.Pipe(duplex=False)
 
1090
            self.checker = multiprocessing.Process(
 
1091
                target=call_pipe,
 
1092
                args=(pipe[1], subprocess.call, command),
 
1093
                kwargs=popen_args)
 
1094
            self.checker.start()
 
1095
            self.checker_callback_tag = GLib.io_add_watch(
 
1096
                pipe[0].fileno(), GLib.IO_IN,
 
1097
                self.checker_callback, pipe[0], command)
 
1098
        # Re-run this periodically if run by GLib.timeout_add
574
1099
        return True
575
 
    
 
1100
 
576
1101
    def stop_checker(self):
577
1102
        """Force the checker process, if any, to stop."""
578
1103
        if self.checker_callback_tag:
579
 
            gobject.source_remove(self.checker_callback_tag)
 
1104
            GLib.source_remove(self.checker_callback_tag)
580
1105
            self.checker_callback_tag = None
581
1106
        if getattr(self, "checker", None) is None:
582
1107
            return
583
1108
        logger.debug("Stopping checker for %(name)s", vars(self))
584
 
        try:
585
 
            os.kill(self.checker.pid, signal.SIGTERM)
586
 
            #time.sleep(0.5)
587
 
            #if self.checker.poll() is None:
588
 
            #    os.kill(self.checker.pid, signal.SIGKILL)
589
 
        except OSError as error:
590
 
            if error.errno != errno.ESRCH: # No such process
591
 
                raise
 
1109
        self.checker.terminate()
592
1110
        self.checker = None
593
1111
 
594
 
    # Encrypts a client secret and stores it in a varible encrypted_secret
595
 
    def encrypt_secret(self, key):
596
 
        # Encryption-key need to be of a specific size, so we hash inputed key
597
 
        hasheng = hashlib.sha256()
598
 
        hasheng.update(key)
599
 
        encryptionkey = hasheng.digest()
600
 
 
601
 
        # Create validation hash so we know at decryption if it was sucessful
602
 
        hasheng = hashlib.sha256()
603
 
        hasheng.update(self.secret)
604
 
        validationhash = hasheng.digest()
605
 
 
606
 
        # Encrypt secret
607
 
        iv = os.urandom(Crypto.Cipher.AES.block_size)
608
 
        ciphereng = Crypto.Cipher.AES.new(encryptionkey,
609
 
                                        Crypto.Cipher.AES.MODE_CFB, iv)
610
 
        ciphertext = ciphereng.encrypt(validationhash+self.secret)
611
 
        self.encrypted_secret = (ciphertext, iv)
612
 
 
613
 
    # Decrypt a encrypted client secret
614
 
    def decrypt_secret(self, key):
615
 
        # Decryption-key need to be of a specific size, so we hash inputed key
616
 
        hasheng = hashlib.sha256()
617
 
        hasheng.update(key)
618
 
        encryptionkey = hasheng.digest()
619
 
 
620
 
        # Decrypt encrypted secret
621
 
        ciphertext, iv = self.encrypted_secret
622
 
        ciphereng = Crypto.Cipher.AES.new(encryptionkey,
623
 
                                        Crypto.Cipher.AES.MODE_CFB, iv)
624
 
        plain = ciphereng.decrypt(ciphertext)
625
 
 
626
 
        # Validate decrypted secret to know if it was succesful
627
 
        hasheng = hashlib.sha256()
628
 
        validationhash = plain[:hasheng.digest_size]
629
 
        secret = plain[hasheng.digest_size:]
630
 
        hasheng.update(secret)
631
 
 
632
 
        # if validation fails, we use key as new secret. Otherwhise, we use
633
 
        # the decrypted secret
634
 
        if hasheng.digest() == validationhash:
635
 
            self.secret = secret
636
 
        else:
637
 
            self.secret = key
638
 
        del self.encrypted_secret
639
 
 
640
 
 
641
 
def dbus_service_property(dbus_interface, signature="v",
642
 
                          access="readwrite", byte_arrays=False):
 
1112
 
 
1113
def dbus_service_property(dbus_interface,
 
1114
                          signature="v",
 
1115
                          access="readwrite",
 
1116
                          byte_arrays=False):
643
1117
    """Decorators for marking methods of a DBusObjectWithProperties to
644
1118
    become properties on the D-Bus.
645
 
    
 
1119
 
646
1120
    The decorated method will be called with no arguments by "Get"
647
1121
    and with one argument by "Set".
648
 
    
 
1122
 
649
1123
    The parameters, where they are supported, are the same as
650
1124
    dbus.service.method, except there is only "signature", since the
651
1125
    type from Get() and the type sent to Set() is the same.
654
1128
    # "Set" method, so we fail early here:
655
1129
    if byte_arrays and signature != "ay":
656
1130
        raise ValueError("Byte arrays not supported for non-'ay'"
657
 
                         " signature %r" % signature)
 
1131
                         " signature {!r}".format(signature))
 
1132
 
658
1133
    def decorator(func):
659
1134
        func._dbus_is_property = True
660
1135
        func._dbus_interface = dbus_interface
663
1138
        func._dbus_name = func.__name__
664
1139
        if func._dbus_name.endswith("_dbus_property"):
665
1140
            func._dbus_name = func._dbus_name[:-14]
666
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
667
 
        return func
 
1141
        func._dbus_get_args_options = {'byte_arrays': byte_arrays}
 
1142
        return func
 
1143
 
 
1144
    return decorator
 
1145
 
 
1146
 
 
1147
def dbus_interface_annotations(dbus_interface):
 
1148
    """Decorator for marking functions returning interface annotations
 
1149
 
 
1150
    Usage:
 
1151
 
 
1152
    @dbus_interface_annotations("org.example.Interface")
 
1153
    def _foo(self):  # Function name does not matter
 
1154
        return {"org.freedesktop.DBus.Deprecated": "true",
 
1155
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
 
1156
                    "false"}
 
1157
    """
 
1158
 
 
1159
    def decorator(func):
 
1160
        func._dbus_is_interface = True
 
1161
        func._dbus_interface = dbus_interface
 
1162
        func._dbus_name = dbus_interface
 
1163
        return func
 
1164
 
 
1165
    return decorator
 
1166
 
 
1167
 
 
1168
def dbus_annotations(annotations):
 
1169
    """Decorator to annotate D-Bus methods, signals or properties
 
1170
    Usage:
 
1171
 
 
1172
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
 
1173
                       "org.freedesktop.DBus.Property."
 
1174
                       "EmitsChangedSignal": "false"})
 
1175
    @dbus_service_property("org.example.Interface", signature="b",
 
1176
                           access="r")
 
1177
    def Property_dbus_property(self):
 
1178
        return dbus.Boolean(False)
 
1179
 
 
1180
    See also the DBusObjectWithAnnotations class.
 
1181
    """
 
1182
 
 
1183
    def decorator(func):
 
1184
        func._dbus_annotations = annotations
 
1185
        return func
 
1186
 
668
1187
    return decorator
669
1188
 
670
1189
 
671
1190
class DBusPropertyException(dbus.exceptions.DBusException):
672
1191
    """A base class for D-Bus property-related exceptions
673
1192
    """
674
 
    def __unicode__(self):
675
 
        return unicode(str(self))
 
1193
    pass
676
1194
 
677
1195
 
678
1196
class DBusPropertyAccessException(DBusPropertyException):
687
1205
    pass
688
1206
 
689
1207
 
690
 
class DBusObjectWithProperties(dbus.service.Object):
 
1208
class DBusObjectWithAnnotations(dbus.service.Object):
 
1209
    """A D-Bus object with annotations.
 
1210
 
 
1211
    Classes inheriting from this can use the dbus_annotations
 
1212
    decorator to add annotations to methods or signals.
 
1213
    """
 
1214
 
 
1215
    @staticmethod
 
1216
    def _is_dbus_thing(thing):
 
1217
        """Returns a function testing if an attribute is a D-Bus thing
 
1218
 
 
1219
        If called like _is_dbus_thing("method") it returns a function
 
1220
        suitable for use as predicate to inspect.getmembers().
 
1221
        """
 
1222
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
 
1223
                                   False)
 
1224
 
 
1225
    def _get_all_dbus_things(self, thing):
 
1226
        """Returns a generator of (name, attribute) pairs
 
1227
        """
 
1228
        return ((getattr(athing.__get__(self), "_dbus_name", name),
 
1229
                 athing.__get__(self))
 
1230
                for cls in self.__class__.__mro__
 
1231
                for name, athing in
 
1232
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
 
1233
 
 
1234
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1235
                         out_signature="s",
 
1236
                         path_keyword='object_path',
 
1237
                         connection_keyword='connection')
 
1238
    def Introspect(self, object_path, connection):
 
1239
        """Overloading of standard D-Bus method.
 
1240
 
 
1241
        Inserts annotation tags on methods and signals.
 
1242
        """
 
1243
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
1244
                                                   connection)
 
1245
        try:
 
1246
            document = xml.dom.minidom.parseString(xmlstring)
 
1247
 
 
1248
            for if_tag in document.getElementsByTagName("interface"):
 
1249
                # Add annotation tags
 
1250
                for typ in ("method", "signal"):
 
1251
                    for tag in if_tag.getElementsByTagName(typ):
 
1252
                        annots = dict()
 
1253
                        for name, prop in (self.
 
1254
                                           _get_all_dbus_things(typ)):
 
1255
                            if (name == tag.getAttribute("name")
 
1256
                                and prop._dbus_interface
 
1257
                                == if_tag.getAttribute("name")):
 
1258
                                annots.update(getattr(
 
1259
                                    prop, "_dbus_annotations", {}))
 
1260
                        for name, value in annots.items():
 
1261
                            ann_tag = document.createElement(
 
1262
                                "annotation")
 
1263
                            ann_tag.setAttribute("name", name)
 
1264
                            ann_tag.setAttribute("value", value)
 
1265
                            tag.appendChild(ann_tag)
 
1266
                # Add interface annotation tags
 
1267
                for annotation, value in dict(
 
1268
                    itertools.chain.from_iterable(
 
1269
                        annotations().items()
 
1270
                        for name, annotations
 
1271
                        in self._get_all_dbus_things("interface")
 
1272
                        if name == if_tag.getAttribute("name")
 
1273
                        )).items():
 
1274
                    ann_tag = document.createElement("annotation")
 
1275
                    ann_tag.setAttribute("name", annotation)
 
1276
                    ann_tag.setAttribute("value", value)
 
1277
                    if_tag.appendChild(ann_tag)
 
1278
                # Fix argument name for the Introspect method itself
 
1279
                if (if_tag.getAttribute("name")
 
1280
                    == dbus.INTROSPECTABLE_IFACE):
 
1281
                    for cn in if_tag.getElementsByTagName("method"):
 
1282
                        if cn.getAttribute("name") == "Introspect":
 
1283
                            for arg in cn.getElementsByTagName("arg"):
 
1284
                                if (arg.getAttribute("direction")
 
1285
                                    == "out"):
 
1286
                                    arg.setAttribute("name",
 
1287
                                                     "xml_data")
 
1288
            xmlstring = document.toxml("utf-8")
 
1289
            document.unlink()
 
1290
        except (AttributeError, xml.dom.DOMException,
 
1291
                xml.parsers.expat.ExpatError) as error:
 
1292
            logger.error("Failed to override Introspection method",
 
1293
                         exc_info=error)
 
1294
        return xmlstring
 
1295
 
 
1296
 
 
1297
class DBusObjectWithProperties(DBusObjectWithAnnotations):
691
1298
    """A D-Bus object with properties.
692
 
    
 
1299
 
693
1300
    Classes inheriting from this can use the dbus_service_property
694
1301
    decorator to expose methods as D-Bus properties.  It exposes the
695
1302
    standard Get(), Set(), and GetAll() methods on the D-Bus.
696
1303
    """
697
 
    
698
 
    @staticmethod
699
 
    def _is_dbus_property(obj):
700
 
        return getattr(obj, "_dbus_is_property", False)
701
 
    
702
 
    def _get_all_dbus_properties(self):
703
 
        """Returns a generator of (name, attribute) pairs
704
 
        """
705
 
        return ((prop.__get__(self)._dbus_name, prop.__get__(self))
706
 
                for cls in self.__class__.__mro__
707
 
                for name, prop in
708
 
                inspect.getmembers(cls, self._is_dbus_property))
709
 
    
 
1304
 
710
1305
    def _get_dbus_property(self, interface_name, property_name):
711
1306
        """Returns a bound method if one exists which is a D-Bus
712
1307
        property with the specified name and interface.
713
1308
        """
714
 
        for cls in  self.__class__.__mro__:
715
 
            for name, value in (inspect.getmembers
716
 
                                (cls, self._is_dbus_property)):
 
1309
        for cls in self.__class__.__mro__:
 
1310
            for name, value in inspect.getmembers(
 
1311
                    cls, self._is_dbus_thing("property")):
717
1312
                if (value._dbus_name == property_name
718
1313
                    and value._dbus_interface == interface_name):
719
1314
                    return value.__get__(self)
720
 
        
 
1315
 
721
1316
        # No such property
722
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
723
 
                                   + interface_name + "."
724
 
                                   + property_name)
725
 
    
726
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
 
1317
        raise DBusPropertyNotFound("{}:{}.{}".format(
 
1318
            self.dbus_object_path, interface_name, property_name))
 
1319
 
 
1320
    @classmethod
 
1321
    def _get_all_interface_names(cls):
 
1322
        """Get a sequence of all interfaces supported by an object"""
 
1323
        return (name for name in set(getattr(getattr(x, attr),
 
1324
                                             "_dbus_interface", None)
 
1325
                                     for x in (inspect.getmro(cls))
 
1326
                                     for attr in dir(x))
 
1327
                if name is not None)
 
1328
 
 
1329
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1330
                         in_signature="ss",
727
1331
                         out_signature="v")
728
1332
    def Get(self, interface_name, property_name):
729
1333
        """Standard D-Bus property Get() method, see D-Bus standard.
735
1339
        if not hasattr(value, "variant_level"):
736
1340
            return value
737
1341
        return type(value)(value, variant_level=value.variant_level+1)
738
 
    
 
1342
 
739
1343
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
740
1344
    def Set(self, interface_name, property_name, value):
741
1345
        """Standard D-Bus property Set() method, see D-Bus standard.
747
1351
            # The byte_arrays option is not supported yet on
748
1352
            # signatures other than "ay".
749
1353
            if prop._dbus_signature != "ay":
750
 
                raise ValueError
751
 
            value = dbus.ByteArray(''.join(unichr(byte)
752
 
                                           for byte in value))
 
1354
                raise ValueError("Byte arrays not supported for non-"
 
1355
                                 "'ay' signature {!r}"
 
1356
                                 .format(prop._dbus_signature))
 
1357
            value = dbus.ByteArray(b''.join(chr(byte)
 
1358
                                            for byte in value))
753
1359
        prop(value)
754
 
    
755
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
 
1360
 
 
1361
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1362
                         in_signature="s",
756
1363
                         out_signature="a{sv}")
757
1364
    def GetAll(self, interface_name):
758
1365
        """Standard D-Bus property GetAll() method, see D-Bus
759
1366
        standard.
760
 
        
 
1367
 
761
1368
        Note: Will not include properties with access="write".
762
1369
        """
763
 
        all = {}
764
 
        for name, prop in self._get_all_dbus_properties():
 
1370
        properties = {}
 
1371
        for name, prop in self._get_all_dbus_things("property"):
765
1372
            if (interface_name
766
1373
                and interface_name != prop._dbus_interface):
767
1374
                # Interface non-empty but did not match
771
1378
                continue
772
1379
            value = prop()
773
1380
            if not hasattr(value, "variant_level"):
774
 
                all[name] = value
 
1381
                properties[name] = value
775
1382
                continue
776
 
            all[name] = type(value)(value, variant_level=
777
 
                                    value.variant_level+1)
778
 
        return dbus.Dictionary(all, signature="sv")
779
 
    
 
1383
            properties[name] = type(value)(
 
1384
                value, variant_level=value.variant_level + 1)
 
1385
        return dbus.Dictionary(properties, signature="sv")
 
1386
 
 
1387
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
 
1388
    def PropertiesChanged(self, interface_name, changed_properties,
 
1389
                          invalidated_properties):
 
1390
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
 
1391
        standard.
 
1392
        """
 
1393
        pass
 
1394
 
780
1395
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
781
1396
                         out_signature="s",
782
1397
                         path_keyword='object_path',
783
1398
                         connection_keyword='connection')
784
1399
    def Introspect(self, object_path, connection):
785
 
        """Standard D-Bus method, overloaded to insert property tags.
 
1400
        """Overloading of standard D-Bus method.
 
1401
 
 
1402
        Inserts property tags and interface annotation tags.
786
1403
        """
787
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
788
 
                                                   connection)
 
1404
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1405
                                                         object_path,
 
1406
                                                         connection)
789
1407
        try:
790
1408
            document = xml.dom.minidom.parseString(xmlstring)
 
1409
 
791
1410
            def make_tag(document, name, prop):
792
1411
                e = document.createElement("property")
793
1412
                e.setAttribute("name", name)
794
1413
                e.setAttribute("type", prop._dbus_signature)
795
1414
                e.setAttribute("access", prop._dbus_access)
796
1415
                return e
 
1416
 
797
1417
            for if_tag in document.getElementsByTagName("interface"):
 
1418
                # Add property tags
798
1419
                for tag in (make_tag(document, name, prop)
799
1420
                            for name, prop
800
 
                            in self._get_all_dbus_properties()
 
1421
                            in self._get_all_dbus_things("property")
801
1422
                            if prop._dbus_interface
802
1423
                            == if_tag.getAttribute("name")):
803
1424
                    if_tag.appendChild(tag)
 
1425
                # Add annotation tags for properties
 
1426
                for tag in if_tag.getElementsByTagName("property"):
 
1427
                    annots = dict()
 
1428
                    for name, prop in self._get_all_dbus_things(
 
1429
                            "property"):
 
1430
                        if (name == tag.getAttribute("name")
 
1431
                            and prop._dbus_interface
 
1432
                            == if_tag.getAttribute("name")):
 
1433
                            annots.update(getattr(
 
1434
                                prop, "_dbus_annotations", {}))
 
1435
                    for name, value in annots.items():
 
1436
                        ann_tag = document.createElement(
 
1437
                            "annotation")
 
1438
                        ann_tag.setAttribute("name", name)
 
1439
                        ann_tag.setAttribute("value", value)
 
1440
                        tag.appendChild(ann_tag)
804
1441
                # Add the names to the return values for the
805
1442
                # "org.freedesktop.DBus.Properties" methods
806
1443
                if (if_tag.getAttribute("name")
821
1458
        except (AttributeError, xml.dom.DOMException,
822
1459
                xml.parsers.expat.ExpatError) as error:
823
1460
            logger.error("Failed to override Introspection method",
824
 
                         error)
825
 
        return xmlstring
826
 
 
827
 
 
828
 
def datetime_to_dbus (dt, variant_level=0):
 
1461
                         exc_info=error)
 
1462
        return xmlstring
 
1463
 
 
1464
 
 
1465
try:
 
1466
    dbus.OBJECT_MANAGER_IFACE
 
1467
except AttributeError:
 
1468
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
1469
 
 
1470
 
 
1471
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
 
1472
    """A D-Bus object with an ObjectManager.
 
1473
 
 
1474
    Classes inheriting from this exposes the standard
 
1475
    GetManagedObjects call and the InterfacesAdded and
 
1476
    InterfacesRemoved signals on the standard
 
1477
    "org.freedesktop.DBus.ObjectManager" interface.
 
1478
 
 
1479
    Note: No signals are sent automatically; they must be sent
 
1480
    manually.
 
1481
    """
 
1482
    @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
1483
                         out_signature="a{oa{sa{sv}}}")
 
1484
    def GetManagedObjects(self):
 
1485
        """This function must be overridden"""
 
1486
        raise NotImplementedError()
 
1487
 
 
1488
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
 
1489
                         signature="oa{sa{sv}}")
 
1490
    def InterfacesAdded(self, object_path, interfaces_and_properties):
 
1491
        pass
 
1492
 
 
1493
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
 
1494
    def InterfacesRemoved(self, object_path, interfaces):
 
1495
        pass
 
1496
 
 
1497
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1498
                         out_signature="s",
 
1499
                         path_keyword='object_path',
 
1500
                         connection_keyword='connection')
 
1501
    def Introspect(self, object_path, connection):
 
1502
        """Overloading of standard D-Bus method.
 
1503
 
 
1504
        Override return argument name of GetManagedObjects to be
 
1505
        "objpath_interfaces_and_properties"
 
1506
        """
 
1507
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1508
                                                         object_path,
 
1509
                                                         connection)
 
1510
        try:
 
1511
            document = xml.dom.minidom.parseString(xmlstring)
 
1512
 
 
1513
            for if_tag in document.getElementsByTagName("interface"):
 
1514
                # Fix argument name for the GetManagedObjects method
 
1515
                if (if_tag.getAttribute("name")
 
1516
                    == dbus.OBJECT_MANAGER_IFACE):
 
1517
                    for cn in if_tag.getElementsByTagName("method"):
 
1518
                        if (cn.getAttribute("name")
 
1519
                            == "GetManagedObjects"):
 
1520
                            for arg in cn.getElementsByTagName("arg"):
 
1521
                                if (arg.getAttribute("direction")
 
1522
                                    == "out"):
 
1523
                                    arg.setAttribute(
 
1524
                                        "name",
 
1525
                                        "objpath_interfaces"
 
1526
                                        "_and_properties")
 
1527
            xmlstring = document.toxml("utf-8")
 
1528
            document.unlink()
 
1529
        except (AttributeError, xml.dom.DOMException,
 
1530
                xml.parsers.expat.ExpatError) as error:
 
1531
            logger.error("Failed to override Introspection method",
 
1532
                         exc_info=error)
 
1533
        return xmlstring
 
1534
 
 
1535
 
 
1536
def datetime_to_dbus(dt, variant_level=0):
829
1537
    """Convert a UTC datetime.datetime() to a D-Bus type."""
830
1538
    if dt is None:
831
 
        return dbus.String("", variant_level = variant_level)
832
 
    return dbus.String(dt.isoformat(),
833
 
                       variant_level=variant_level)
834
 
 
835
 
class AlternateDBusNamesMetaclass(DBusObjectWithProperties
836
 
                                  .__metaclass__):
837
 
    """Applied to an empty subclass of a D-Bus object, this metaclass
838
 
    will add additional D-Bus attributes matching a certain pattern.
 
1539
        return dbus.String("", variant_level=variant_level)
 
1540
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
1541
 
 
1542
 
 
1543
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
 
1544
    """A class decorator; applied to a subclass of
 
1545
    dbus.service.Object, it will add alternate D-Bus attributes with
 
1546
    interface names according to the "alt_interface_names" mapping.
 
1547
    Usage:
 
1548
 
 
1549
    @alternate_dbus_interfaces({"org.example.Interface":
 
1550
                                    "net.example.AlternateInterface"})
 
1551
    class SampleDBusObject(dbus.service.Object):
 
1552
        @dbus.service.method("org.example.Interface")
 
1553
        def SampleDBusMethod():
 
1554
            pass
 
1555
 
 
1556
    The above "SampleDBusMethod" on "SampleDBusObject" will be
 
1557
    reachable via two interfaces: "org.example.Interface" and
 
1558
    "net.example.AlternateInterface", the latter of which will have
 
1559
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
 
1560
    "true", unless "deprecate" is passed with a False value.
 
1561
 
 
1562
    This works for methods and signals, and also for D-Bus properties
 
1563
    (from DBusObjectWithProperties) and interfaces (from the
 
1564
    dbus_interface_annotations decorator).
839
1565
    """
840
 
    def __new__(mcs, name, bases, attr):
841
 
        # Go through all the base classes which could have D-Bus
842
 
        # methods, signals, or properties in them
843
 
        for base in (b for b in bases
844
 
                     if issubclass(b, dbus.service.Object)):
845
 
            # Go though all attributes of the base class
846
 
            for attrname, attribute in inspect.getmembers(base):
 
1566
 
 
1567
    def wrapper(cls):
 
1568
        for orig_interface_name, alt_interface_name in (
 
1569
                alt_interface_names.items()):
 
1570
            attr = {}
 
1571
            interface_names = set()
 
1572
            # Go though all attributes of the class
 
1573
            for attrname, attribute in inspect.getmembers(cls):
847
1574
                # Ignore non-D-Bus attributes, and D-Bus attributes
848
1575
                # with the wrong interface name
849
1576
                if (not hasattr(attribute, "_dbus_interface")
850
 
                    or not attribute._dbus_interface
851
 
                    .startswith("se.recompile.Mandos")):
 
1577
                    or not attribute._dbus_interface.startswith(
 
1578
                        orig_interface_name)):
852
1579
                    continue
853
1580
                # Create an alternate D-Bus interface name based on
854
1581
                # the current name
855
 
                alt_interface = (attribute._dbus_interface
856
 
                                 .replace("se.recompile.Mandos",
857
 
                                          "se.bsnet.fukt.Mandos"))
 
1582
                alt_interface = attribute._dbus_interface.replace(
 
1583
                    orig_interface_name, alt_interface_name)
 
1584
                interface_names.add(alt_interface)
858
1585
                # Is this a D-Bus signal?
859
1586
                if getattr(attribute, "_dbus_is_signal", False):
860
 
                    # Extract the original non-method function by
861
 
                    # black magic
862
 
                    nonmethod_func = (dict(
 
1587
                    # Extract the original non-method undecorated
 
1588
                    # function by black magic
 
1589
                    if sys.version_info.major == 2:
 
1590
                        nonmethod_func = (dict(
863
1591
                            zip(attribute.func_code.co_freevars,
864
 
                                attribute.__closure__))["func"]
865
 
                                      .cell_contents)
 
1592
                                attribute.__closure__))
 
1593
                                          ["func"].cell_contents)
 
1594
                    else:
 
1595
                        nonmethod_func = (dict(
 
1596
                            zip(attribute.__code__.co_freevars,
 
1597
                                attribute.__closure__))
 
1598
                                          ["func"].cell_contents)
866
1599
                    # Create a new, but exactly alike, function
867
1600
                    # object, and decorate it to be a new D-Bus signal
868
1601
                    # with the alternate D-Bus interface name
869
 
                    new_function = (dbus.service.signal
870
 
                                    (alt_interface,
871
 
                                     attribute._dbus_signature)
872
 
                                    (types.FunctionType(
873
 
                                nonmethod_func.func_code,
874
 
                                nonmethod_func.func_globals,
875
 
                                nonmethod_func.func_name,
876
 
                                nonmethod_func.func_defaults,
877
 
                                nonmethod_func.func_closure)))
 
1602
                    new_function = copy_function(nonmethod_func)
 
1603
                    new_function = (dbus.service.signal(
 
1604
                        alt_interface,
 
1605
                        attribute._dbus_signature)(new_function))
 
1606
                    # Copy annotations, if any
 
1607
                    try:
 
1608
                        new_function._dbus_annotations = dict(
 
1609
                            attribute._dbus_annotations)
 
1610
                    except AttributeError:
 
1611
                        pass
 
1612
 
878
1613
                    # Define a creator of a function to call both the
879
 
                    # old and new functions, so both the old and new
880
 
                    # signals gets sent when the function is called
 
1614
                    # original and alternate functions, so both the
 
1615
                    # original and alternate signals gets sent when
 
1616
                    # the function is called
881
1617
                    def fixscope(func1, func2):
882
1618
                        """This function is a scope container to pass
883
1619
                        func1 and func2 to the "call_both" function
884
1620
                        outside of its arguments"""
 
1621
 
 
1622
                        @functools.wraps(func2)
885
1623
                        def call_both(*args, **kwargs):
886
1624
                            """This function will emit two D-Bus
887
1625
                            signals by calling func1 and func2"""
888
1626
                            func1(*args, **kwargs)
889
1627
                            func2(*args, **kwargs)
 
1628
                        # Make wrapper function look like a D-Bus
 
1629
                        # signal
 
1630
                        for name, attr in inspect.getmembers(func2):
 
1631
                            if name.startswith("_dbus_"):
 
1632
                                setattr(call_both, name, attr)
 
1633
 
890
1634
                        return call_both
891
1635
                    # Create the "call_both" function and add it to
892
1636
                    # the class
893
 
                    attr[attrname] = fixscope(attribute,
894
 
                                              new_function)
 
1637
                    attr[attrname] = fixscope(attribute, new_function)
895
1638
                # Is this a D-Bus method?
896
1639
                elif getattr(attribute, "_dbus_is_method", False):
897
1640
                    # Create a new, but exactly alike, function
898
1641
                    # object.  Decorate it to be a new D-Bus method
899
1642
                    # with the alternate D-Bus interface name.  Add it
900
1643
                    # to the class.
901
 
                    attr[attrname] = (dbus.service.method
902
 
                                      (alt_interface,
903
 
                                       attribute._dbus_in_signature,
904
 
                                       attribute._dbus_out_signature)
905
 
                                      (types.FunctionType
906
 
                                       (attribute.func_code,
907
 
                                        attribute.func_globals,
908
 
                                        attribute.func_name,
909
 
                                        attribute.func_defaults,
910
 
                                        attribute.func_closure)))
 
1644
                    attr[attrname] = (
 
1645
                        dbus.service.method(
 
1646
                            alt_interface,
 
1647
                            attribute._dbus_in_signature,
 
1648
                            attribute._dbus_out_signature)
 
1649
                        (copy_function(attribute)))
 
1650
                    # Copy annotations, if any
 
1651
                    try:
 
1652
                        attr[attrname]._dbus_annotations = dict(
 
1653
                            attribute._dbus_annotations)
 
1654
                    except AttributeError:
 
1655
                        pass
911
1656
                # Is this a D-Bus property?
912
1657
                elif getattr(attribute, "_dbus_is_property", False):
913
1658
                    # Create a new, but exactly alike, function
914
1659
                    # object, and decorate it to be a new D-Bus
915
1660
                    # property with the alternate D-Bus interface
916
1661
                    # name.  Add it to the class.
917
 
                    attr[attrname] = (dbus_service_property
918
 
                                      (alt_interface,
919
 
                                       attribute._dbus_signature,
920
 
                                       attribute._dbus_access,
921
 
                                       attribute
922
 
                                       ._dbus_get_args_options
923
 
                                       ["byte_arrays"])
924
 
                                      (types.FunctionType
925
 
                                       (attribute.func_code,
926
 
                                        attribute.func_globals,
927
 
                                        attribute.func_name,
928
 
                                        attribute.func_defaults,
929
 
                                        attribute.func_closure)))
930
 
        return type.__new__(mcs, name, bases, attr)
931
 
 
 
1662
                    attr[attrname] = (dbus_service_property(
 
1663
                        alt_interface, attribute._dbus_signature,
 
1664
                        attribute._dbus_access,
 
1665
                        attribute._dbus_get_args_options
 
1666
                        ["byte_arrays"])
 
1667
                                      (copy_function(attribute)))
 
1668
                    # Copy annotations, if any
 
1669
                    try:
 
1670
                        attr[attrname]._dbus_annotations = dict(
 
1671
                            attribute._dbus_annotations)
 
1672
                    except AttributeError:
 
1673
                        pass
 
1674
                # Is this a D-Bus interface?
 
1675
                elif getattr(attribute, "_dbus_is_interface", False):
 
1676
                    # Create a new, but exactly alike, function
 
1677
                    # object.  Decorate it to be a new D-Bus interface
 
1678
                    # with the alternate D-Bus interface name.  Add it
 
1679
                    # to the class.
 
1680
                    attr[attrname] = (
 
1681
                        dbus_interface_annotations(alt_interface)
 
1682
                        (copy_function(attribute)))
 
1683
            if deprecate:
 
1684
                # Deprecate all alternate interfaces
 
1685
                iname = "_AlternateDBusNames_interface_annotation{}"
 
1686
                for interface_name in interface_names:
 
1687
 
 
1688
                    @dbus_interface_annotations(interface_name)
 
1689
                    def func(self):
 
1690
                        return {"org.freedesktop.DBus.Deprecated":
 
1691
                                "true"}
 
1692
                    # Find an unused name
 
1693
                    for aname in (iname.format(i)
 
1694
                                  for i in itertools.count()):
 
1695
                        if aname not in attr:
 
1696
                            attr[aname] = func
 
1697
                            break
 
1698
            if interface_names:
 
1699
                # Replace the class with a new subclass of it with
 
1700
                # methods, signals, etc. as created above.
 
1701
                if sys.version_info.major == 2:
 
1702
                    cls = type(b"{}Alternate".format(cls.__name__),
 
1703
                               (cls, ), attr)
 
1704
                else:
 
1705
                    cls = type("{}Alternate".format(cls.__name__),
 
1706
                               (cls, ), attr)
 
1707
        return cls
 
1708
 
 
1709
    return wrapper
 
1710
 
 
1711
 
 
1712
@alternate_dbus_interfaces({"se.recompile.Mandos":
 
1713
                            "se.bsnet.fukt.Mandos"})
932
1714
class ClientDBus(Client, DBusObjectWithProperties):
933
1715
    """A Client class using D-Bus
934
 
    
 
1716
 
935
1717
    Attributes:
936
1718
    dbus_object_path: dbus.ObjectPath
937
1719
    bus: dbus.SystemBus()
938
1720
    """
939
 
    
 
1721
 
940
1722
    runtime_expansions = (Client.runtime_expansions
941
 
                          + ("dbus_object_path",))
942
 
    
 
1723
                          + ("dbus_object_path", ))
 
1724
 
 
1725
    _interface = "se.recompile.Mandos.Client"
 
1726
 
943
1727
    # dbus.service.Object doesn't use super(), so we can't either.
944
 
    
945
 
    def __init__(self, bus = None, *args, **kwargs):
 
1728
 
 
1729
    def __init__(self, bus=None, *args, **kwargs):
946
1730
        self.bus = bus
947
1731
        Client.__init__(self, *args, **kwargs)
948
 
 
949
 
        self._approvals_pending = 0
950
1732
        # Only now, when this client is initialized, can it show up on
951
1733
        # the D-Bus
952
 
        client_object_name = unicode(self.name).translate(
 
1734
        client_object_name = str(self.name).translate(
953
1735
            {ord("."): ord("_"),
954
1736
             ord("-"): ord("_")})
955
 
        self.dbus_object_path = (dbus.ObjectPath
956
 
                                 ("/clients/" + client_object_name))
 
1737
        self.dbus_object_path = dbus.ObjectPath(
 
1738
            "/clients/" + client_object_name)
957
1739
        DBusObjectWithProperties.__init__(self, self.bus,
958
1740
                                          self.dbus_object_path)
959
 
        
960
 
    def notifychangeproperty(transform_func,
961
 
                             dbus_name, type_func=lambda x: x,
962
 
                             variant_level=1):
 
1741
 
 
1742
    def notifychangeproperty(transform_func, dbus_name,
 
1743
                             type_func=lambda x: x,
 
1744
                             variant_level=1,
 
1745
                             invalidate_only=False,
 
1746
                             _interface=_interface):
963
1747
        """ Modify a variable so that it's a property which announces
964
1748
        its changes to DBus.
965
1749
 
970
1754
                   to the D-Bus.  Default: no transform
971
1755
        variant_level: D-Bus variant level.  Default: 1
972
1756
        """
973
 
        attrname = "_{0}".format(dbus_name)
 
1757
        attrname = "_{}".format(dbus_name)
 
1758
 
974
1759
        def setter(self, value):
975
1760
            if hasattr(self, "dbus_object_path"):
976
1761
                if (not hasattr(self, attrname) or
977
1762
                    type_func(getattr(self, attrname, None))
978
1763
                    != type_func(value)):
979
 
                    dbus_value = transform_func(type_func(value),
980
 
                                                variant_level
981
 
                                                =variant_level)
982
 
                    self.PropertyChanged(dbus.String(dbus_name),
983
 
                                         dbus_value)
 
1764
                    if invalidate_only:
 
1765
                        self.PropertiesChanged(
 
1766
                            _interface, dbus.Dictionary(),
 
1767
                            dbus.Array((dbus_name, )))
 
1768
                    else:
 
1769
                        dbus_value = transform_func(
 
1770
                            type_func(value),
 
1771
                            variant_level=variant_level)
 
1772
                        self.PropertyChanged(dbus.String(dbus_name),
 
1773
                                             dbus_value)
 
1774
                        self.PropertiesChanged(
 
1775
                            _interface,
 
1776
                            dbus.Dictionary({dbus.String(dbus_name):
 
1777
                                             dbus_value}),
 
1778
                            dbus.Array())
984
1779
            setattr(self, attrname, value)
985
 
        
 
1780
 
986
1781
        return property(lambda self: getattr(self, attrname), setter)
987
 
    
988
 
    
 
1782
 
989
1783
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
990
1784
    approvals_pending = notifychangeproperty(dbus.Boolean,
991
1785
                                             "ApprovalPending",
992
 
                                             type_func = bool)
 
1786
                                             type_func=bool)
993
1787
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
994
1788
    last_enabled = notifychangeproperty(datetime_to_dbus,
995
1789
                                        "LastEnabled")
996
 
    checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",
997
 
                                   type_func = lambda checker:
998
 
                                       checker is not None)
 
1790
    checker = notifychangeproperty(
 
1791
        dbus.Boolean, "CheckerRunning",
 
1792
        type_func=lambda checker: checker is not None)
999
1793
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1000
1794
                                           "LastCheckedOK")
 
1795
    last_checker_status = notifychangeproperty(dbus.Int16,
 
1796
                                               "LastCheckerStatus")
1001
1797
    last_approval_request = notifychangeproperty(
1002
1798
        datetime_to_dbus, "LastApprovalRequest")
1003
1799
    approved_by_default = notifychangeproperty(dbus.Boolean,
1004
1800
                                               "ApprovedByDefault")
1005
 
    approval_delay = notifychangeproperty(dbus.UInt16,
1006
 
                                          "ApprovalDelay",
1007
 
                                          type_func =
1008
 
                                          _timedelta_to_milliseconds)
 
1801
    approval_delay = notifychangeproperty(
 
1802
        dbus.UInt64, "ApprovalDelay",
 
1803
        type_func=lambda td: td.total_seconds() * 1000)
1009
1804
    approval_duration = notifychangeproperty(
1010
 
        dbus.UInt16, "ApprovalDuration",
1011
 
        type_func = _timedelta_to_milliseconds)
 
1805
        dbus.UInt64, "ApprovalDuration",
 
1806
        type_func=lambda td: td.total_seconds() * 1000)
1012
1807
    host = notifychangeproperty(dbus.String, "Host")
1013
 
    timeout = notifychangeproperty(dbus.UInt16, "Timeout",
1014
 
                                   type_func =
1015
 
                                   _timedelta_to_milliseconds)
 
1808
    timeout = notifychangeproperty(
 
1809
        dbus.UInt64, "Timeout",
 
1810
        type_func=lambda td: td.total_seconds() * 1000)
1016
1811
    extended_timeout = notifychangeproperty(
1017
 
        dbus.UInt16, "ExtendedTimeout",
1018
 
        type_func = _timedelta_to_milliseconds)
1019
 
    interval = notifychangeproperty(dbus.UInt16,
1020
 
                                    "Interval",
1021
 
                                    type_func =
1022
 
                                    _timedelta_to_milliseconds)
 
1812
        dbus.UInt64, "ExtendedTimeout",
 
1813
        type_func=lambda td: td.total_seconds() * 1000)
 
1814
    interval = notifychangeproperty(
 
1815
        dbus.UInt64, "Interval",
 
1816
        type_func=lambda td: td.total_seconds() * 1000)
1023
1817
    checker_command = notifychangeproperty(dbus.String, "Checker")
1024
 
    
 
1818
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
 
1819
                                  invalidate_only=True)
 
1820
 
1025
1821
    del notifychangeproperty
1026
 
    
 
1822
 
1027
1823
    def __del__(self, *args, **kwargs):
1028
1824
        try:
1029
1825
            self.remove_from_connection()
1032
1828
        if hasattr(DBusObjectWithProperties, "__del__"):
1033
1829
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1034
1830
        Client.__del__(self, *args, **kwargs)
1035
 
    
1036
 
    def checker_callback(self, pid, condition, command,
1037
 
                         *args, **kwargs):
1038
 
        self.checker_callback_tag = None
1039
 
        self.checker = None
1040
 
        if os.WIFEXITED(condition):
1041
 
            exitstatus = os.WEXITSTATUS(condition)
 
1831
 
 
1832
    def checker_callback(self, source, condition,
 
1833
                         connection, command, *args, **kwargs):
 
1834
        ret = Client.checker_callback(self, source, condition,
 
1835
                                      connection, command, *args,
 
1836
                                      **kwargs)
 
1837
        exitstatus = self.last_checker_status
 
1838
        if exitstatus >= 0:
1042
1839
            # Emit D-Bus signal
1043
1840
            self.CheckerCompleted(dbus.Int16(exitstatus),
1044
 
                                  dbus.Int64(condition),
 
1841
                                  # This is specific to GNU libC
 
1842
                                  dbus.Int64(exitstatus << 8),
1045
1843
                                  dbus.String(command))
1046
1844
        else:
1047
1845
            # Emit D-Bus signal
1048
1846
            self.CheckerCompleted(dbus.Int16(-1),
1049
 
                                  dbus.Int64(condition),
 
1847
                                  dbus.Int64(
 
1848
                                      # This is specific to GNU libC
 
1849
                                      (exitstatus << 8)
 
1850
                                      | self.last_checker_signal),
1050
1851
                                  dbus.String(command))
1051
 
        
1052
 
        return Client.checker_callback(self, pid, condition, command,
1053
 
                                       *args, **kwargs)
1054
 
    
 
1852
        return ret
 
1853
 
1055
1854
    def start_checker(self, *args, **kwargs):
1056
 
        old_checker = self.checker
1057
 
        if self.checker is not None:
1058
 
            old_checker_pid = self.checker.pid
1059
 
        else:
1060
 
            old_checker_pid = None
 
1855
        old_checker_pid = getattr(self.checker, "pid", None)
1061
1856
        r = Client.start_checker(self, *args, **kwargs)
1062
1857
        # Only if new checker process was started
1063
1858
        if (self.checker is not None
1065
1860
            # Emit D-Bus signal
1066
1861
            self.CheckerStarted(self.current_checker_command)
1067
1862
        return r
1068
 
    
 
1863
 
1069
1864
    def _reset_approved(self):
1070
 
        self._approved = None
 
1865
        self.approved = None
1071
1866
        return False
1072
 
    
 
1867
 
1073
1868
    def approve(self, value=True):
 
1869
        self.approved = value
 
1870
        GLib.timeout_add(int(self.approval_duration.total_seconds()
 
1871
                             * 1000), self._reset_approved)
1074
1872
        self.send_changedstate()
1075
 
        self._approved = value
1076
 
        gobject.timeout_add(_timedelta_to_milliseconds
1077
 
                            (self.approval_duration),
1078
 
                            self._reset_approved)
1079
 
    
1080
 
    
1081
 
    ## D-Bus methods, signals & properties
1082
 
    _interface = "se.recompile.Mandos.Client"
1083
 
    
1084
 
    ## Signals
1085
 
    
 
1873
 
 
1874
    #  D-Bus methods, signals & properties
 
1875
 
 
1876
    #  Interfaces
 
1877
 
 
1878
    #  Signals
 
1879
 
1086
1880
    # CheckerCompleted - signal
1087
1881
    @dbus.service.signal(_interface, signature="nxs")
1088
1882
    def CheckerCompleted(self, exitcode, waitstatus, command):
1089
1883
        "D-Bus signal"
1090
1884
        pass
1091
 
    
 
1885
 
1092
1886
    # CheckerStarted - signal
1093
1887
    @dbus.service.signal(_interface, signature="s")
1094
1888
    def CheckerStarted(self, command):
1095
1889
        "D-Bus signal"
1096
1890
        pass
1097
 
    
 
1891
 
1098
1892
    # PropertyChanged - signal
 
1893
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1099
1894
    @dbus.service.signal(_interface, signature="sv")
1100
1895
    def PropertyChanged(self, property, value):
1101
1896
        "D-Bus signal"
1102
1897
        pass
1103
 
    
 
1898
 
1104
1899
    # GotSecret - signal
1105
1900
    @dbus.service.signal(_interface)
1106
1901
    def GotSecret(self):
1109
1904
        server to mandos-client
1110
1905
        """
1111
1906
        pass
1112
 
    
 
1907
 
1113
1908
    # Rejected - signal
1114
1909
    @dbus.service.signal(_interface, signature="s")
1115
1910
    def Rejected(self, reason):
1116
1911
        "D-Bus signal"
1117
1912
        pass
1118
 
    
 
1913
 
1119
1914
    # NeedApproval - signal
1120
1915
    @dbus.service.signal(_interface, signature="tb")
1121
1916
    def NeedApproval(self, timeout, default):
1122
1917
        "D-Bus signal"
1123
1918
        return self.need_approval()
1124
 
    
1125
 
    ## Methods
1126
 
    
 
1919
 
 
1920
    #  Methods
 
1921
 
1127
1922
    # Approve - method
1128
1923
    @dbus.service.method(_interface, in_signature="b")
1129
1924
    def Approve(self, value):
1130
1925
        self.approve(value)
1131
 
    
 
1926
 
1132
1927
    # CheckedOK - method
1133
1928
    @dbus.service.method(_interface)
1134
1929
    def CheckedOK(self):
1135
1930
        self.checked_ok()
1136
 
    
 
1931
 
1137
1932
    # Enable - method
 
1933
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1138
1934
    @dbus.service.method(_interface)
1139
1935
    def Enable(self):
1140
1936
        "D-Bus method"
1141
1937
        self.enable()
1142
 
    
 
1938
 
1143
1939
    # StartChecker - method
 
1940
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1144
1941
    @dbus.service.method(_interface)
1145
1942
    def StartChecker(self):
1146
1943
        "D-Bus method"
1147
1944
        self.start_checker()
1148
 
    
 
1945
 
1149
1946
    # Disable - method
 
1947
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1150
1948
    @dbus.service.method(_interface)
1151
1949
    def Disable(self):
1152
1950
        "D-Bus method"
1153
1951
        self.disable()
1154
 
    
 
1952
 
1155
1953
    # StopChecker - method
 
1954
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1156
1955
    @dbus.service.method(_interface)
1157
1956
    def StopChecker(self):
1158
1957
        self.stop_checker()
1159
 
    
1160
 
    ## Properties
1161
 
    
 
1958
 
 
1959
    #  Properties
 
1960
 
1162
1961
    # ApprovalPending - property
1163
1962
    @dbus_service_property(_interface, signature="b", access="read")
1164
1963
    def ApprovalPending_dbus_property(self):
1165
1964
        return dbus.Boolean(bool(self.approvals_pending))
1166
 
    
 
1965
 
1167
1966
    # ApprovedByDefault - property
1168
 
    @dbus_service_property(_interface, signature="b",
 
1967
    @dbus_service_property(_interface,
 
1968
                           signature="b",
1169
1969
                           access="readwrite")
1170
1970
    def ApprovedByDefault_dbus_property(self, value=None):
1171
1971
        if value is None:       # get
1172
1972
            return dbus.Boolean(self.approved_by_default)
1173
1973
        self.approved_by_default = bool(value)
1174
 
    
 
1974
 
1175
1975
    # ApprovalDelay - property
1176
 
    @dbus_service_property(_interface, signature="t",
 
1976
    @dbus_service_property(_interface,
 
1977
                           signature="t",
1177
1978
                           access="readwrite")
1178
1979
    def ApprovalDelay_dbus_property(self, value=None):
1179
1980
        if value is None:       # get
1180
 
            return dbus.UInt64(self.approval_delay_milliseconds())
 
1981
            return dbus.UInt64(self.approval_delay.total_seconds()
 
1982
                               * 1000)
1181
1983
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1182
 
    
 
1984
 
1183
1985
    # ApprovalDuration - property
1184
 
    @dbus_service_property(_interface, signature="t",
 
1986
    @dbus_service_property(_interface,
 
1987
                           signature="t",
1185
1988
                           access="readwrite")
1186
1989
    def ApprovalDuration_dbus_property(self, value=None):
1187
1990
        if value is None:       # get
1188
 
            return dbus.UInt64(_timedelta_to_milliseconds(
1189
 
                    self.approval_duration))
 
1991
            return dbus.UInt64(self.approval_duration.total_seconds()
 
1992
                               * 1000)
1190
1993
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1191
 
    
 
1994
 
1192
1995
    # Name - property
 
1996
    @dbus_annotations(
 
1997
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1193
1998
    @dbus_service_property(_interface, signature="s", access="read")
1194
1999
    def Name_dbus_property(self):
1195
2000
        return dbus.String(self.name)
1196
 
    
 
2001
 
1197
2002
    # Fingerprint - property
 
2003
    @dbus_annotations(
 
2004
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1198
2005
    @dbus_service_property(_interface, signature="s", access="read")
1199
2006
    def Fingerprint_dbus_property(self):
1200
2007
        return dbus.String(self.fingerprint)
1201
 
    
 
2008
 
1202
2009
    # Host - property
1203
 
    @dbus_service_property(_interface, signature="s",
 
2010
    @dbus_service_property(_interface,
 
2011
                           signature="s",
1204
2012
                           access="readwrite")
1205
2013
    def Host_dbus_property(self, value=None):
1206
2014
        if value is None:       # get
1207
2015
            return dbus.String(self.host)
1208
 
        self.host = value
1209
 
    
 
2016
        self.host = str(value)
 
2017
 
1210
2018
    # Created - property
 
2019
    @dbus_annotations(
 
2020
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1211
2021
    @dbus_service_property(_interface, signature="s", access="read")
1212
2022
    def Created_dbus_property(self):
1213
 
        return dbus.String(datetime_to_dbus(self.created))
1214
 
    
 
2023
        return datetime_to_dbus(self.created)
 
2024
 
1215
2025
    # LastEnabled - property
1216
2026
    @dbus_service_property(_interface, signature="s", access="read")
1217
2027
    def LastEnabled_dbus_property(self):
1218
2028
        return datetime_to_dbus(self.last_enabled)
1219
 
    
 
2029
 
1220
2030
    # Enabled - property
1221
 
    @dbus_service_property(_interface, signature="b",
 
2031
    @dbus_service_property(_interface,
 
2032
                           signature="b",
1222
2033
                           access="readwrite")
1223
2034
    def Enabled_dbus_property(self, value=None):
1224
2035
        if value is None:       # get
1227
2038
            self.enable()
1228
2039
        else:
1229
2040
            self.disable()
1230
 
    
 
2041
 
1231
2042
    # LastCheckedOK - property
1232
 
    @dbus_service_property(_interface, signature="s",
 
2043
    @dbus_service_property(_interface,
 
2044
                           signature="s",
1233
2045
                           access="readwrite")
1234
2046
    def LastCheckedOK_dbus_property(self, value=None):
1235
2047
        if value is not None:
1236
2048
            self.checked_ok()
1237
2049
            return
1238
2050
        return datetime_to_dbus(self.last_checked_ok)
1239
 
    
 
2051
 
 
2052
    # LastCheckerStatus - property
 
2053
    @dbus_service_property(_interface, signature="n", access="read")
 
2054
    def LastCheckerStatus_dbus_property(self):
 
2055
        return dbus.Int16(self.last_checker_status)
 
2056
 
1240
2057
    # Expires - property
1241
2058
    @dbus_service_property(_interface, signature="s", access="read")
1242
2059
    def Expires_dbus_property(self):
1243
2060
        return datetime_to_dbus(self.expires)
1244
 
    
 
2061
 
1245
2062
    # LastApprovalRequest - property
1246
2063
    @dbus_service_property(_interface, signature="s", access="read")
1247
2064
    def LastApprovalRequest_dbus_property(self):
1248
2065
        return datetime_to_dbus(self.last_approval_request)
1249
 
    
 
2066
 
1250
2067
    # Timeout - property
1251
 
    @dbus_service_property(_interface, signature="t",
 
2068
    @dbus_service_property(_interface,
 
2069
                           signature="t",
1252
2070
                           access="readwrite")
1253
2071
    def Timeout_dbus_property(self, value=None):
1254
2072
        if value is None:       # get
1255
 
            return dbus.UInt64(self.timeout_milliseconds())
 
2073
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
 
2074
        old_timeout = self.timeout
1256
2075
        self.timeout = datetime.timedelta(0, 0, 0, value)
1257
 
        if getattr(self, "disable_initiator_tag", None) is None:
1258
 
            return
1259
 
        # Reschedule timeout
1260
 
        gobject.source_remove(self.disable_initiator_tag)
1261
 
        self.disable_initiator_tag = None
1262
 
        self.expires = None
1263
 
        time_to_die = _timedelta_to_milliseconds((self
1264
 
                                                  .last_checked_ok
1265
 
                                                  + self.timeout)
1266
 
                                                 - datetime.datetime
1267
 
                                                 .utcnow())
1268
 
        if time_to_die <= 0:
1269
 
            # The timeout has passed
1270
 
            self.disable()
1271
 
        else:
1272
 
            self.expires = (datetime.datetime.utcnow()
1273
 
                            + datetime.timedelta(milliseconds =
1274
 
                                                 time_to_die))
1275
 
            self.disable_initiator_tag = (gobject.timeout_add
1276
 
                                          (time_to_die, self.disable))
1277
 
    
 
2076
        # Reschedule disabling
 
2077
        if self.enabled:
 
2078
            now = datetime.datetime.utcnow()
 
2079
            self.expires += self.timeout - old_timeout
 
2080
            if self.expires <= now:
 
2081
                # The timeout has passed
 
2082
                self.disable()
 
2083
            else:
 
2084
                if (getattr(self, "disable_initiator_tag", None)
 
2085
                    is None):
 
2086
                    return
 
2087
                GLib.source_remove(self.disable_initiator_tag)
 
2088
                self.disable_initiator_tag = GLib.timeout_add(
 
2089
                    int((self.expires - now).total_seconds() * 1000),
 
2090
                    self.disable)
 
2091
 
1278
2092
    # ExtendedTimeout - property
1279
 
    @dbus_service_property(_interface, signature="t",
 
2093
    @dbus_service_property(_interface,
 
2094
                           signature="t",
1280
2095
                           access="readwrite")
1281
2096
    def ExtendedTimeout_dbus_property(self, value=None):
1282
2097
        if value is None:       # get
1283
 
            return dbus.UInt64(self.extended_timeout_milliseconds())
 
2098
            return dbus.UInt64(self.extended_timeout.total_seconds()
 
2099
                               * 1000)
1284
2100
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
1285
 
    
 
2101
 
1286
2102
    # Interval - property
1287
 
    @dbus_service_property(_interface, signature="t",
 
2103
    @dbus_service_property(_interface,
 
2104
                           signature="t",
1288
2105
                           access="readwrite")
1289
2106
    def Interval_dbus_property(self, value=None):
1290
2107
        if value is None:       # get
1291
 
            return dbus.UInt64(self.interval_milliseconds())
 
2108
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1292
2109
        self.interval = datetime.timedelta(0, 0, 0, value)
1293
2110
        if getattr(self, "checker_initiator_tag", None) is None:
1294
2111
            return
1295
 
        # Reschedule checker run
1296
 
        gobject.source_remove(self.checker_initiator_tag)
1297
 
        self.checker_initiator_tag = (gobject.timeout_add
1298
 
                                      (value, self.start_checker))
1299
 
        self.start_checker()    # Start one now, too
1300
 
    
 
2112
        if self.enabled:
 
2113
            # Reschedule checker run
 
2114
            GLib.source_remove(self.checker_initiator_tag)
 
2115
            self.checker_initiator_tag = GLib.timeout_add(
 
2116
                value, self.start_checker)
 
2117
            self.start_checker()  # Start one now, too
 
2118
 
1301
2119
    # Checker - property
1302
 
    @dbus_service_property(_interface, signature="s",
 
2120
    @dbus_service_property(_interface,
 
2121
                           signature="s",
1303
2122
                           access="readwrite")
1304
2123
    def Checker_dbus_property(self, value=None):
1305
2124
        if value is None:       # get
1306
2125
            return dbus.String(self.checker_command)
1307
 
        self.checker_command = value
1308
 
    
 
2126
        self.checker_command = str(value)
 
2127
 
1309
2128
    # CheckerRunning - property
1310
 
    @dbus_service_property(_interface, signature="b",
 
2129
    @dbus_service_property(_interface,
 
2130
                           signature="b",
1311
2131
                           access="readwrite")
1312
2132
    def CheckerRunning_dbus_property(self, value=None):
1313
2133
        if value is None:       # get
1316
2136
            self.start_checker()
1317
2137
        else:
1318
2138
            self.stop_checker()
1319
 
    
 
2139
 
1320
2140
    # ObjectPath - property
 
2141
    @dbus_annotations(
 
2142
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
 
2143
         "org.freedesktop.DBus.Deprecated": "true"})
1321
2144
    @dbus_service_property(_interface, signature="o", access="read")
1322
2145
    def ObjectPath_dbus_property(self):
1323
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1324
 
    
 
2146
        return self.dbus_object_path  # is already a dbus.ObjectPath
 
2147
 
1325
2148
    # Secret = property
1326
 
    @dbus_service_property(_interface, signature="ay",
1327
 
                           access="write", byte_arrays=True)
 
2149
    @dbus_annotations(
 
2150
        {"org.freedesktop.DBus.Property.EmitsChangedSignal":
 
2151
         "invalidates"})
 
2152
    @dbus_service_property(_interface,
 
2153
                           signature="ay",
 
2154
                           access="write",
 
2155
                           byte_arrays=True)
1328
2156
    def Secret_dbus_property(self, value):
1329
 
        self.secret = str(value)
1330
 
    
 
2157
        self.secret = bytes(value)
 
2158
 
1331
2159
    del _interface
1332
2160
 
1333
2161
 
1336
2164
        self._pipe = child_pipe
1337
2165
        self._pipe.send(('init', fpr, address))
1338
2166
        if not self._pipe.recv():
1339
 
            raise KeyError()
1340
 
    
 
2167
            raise KeyError(fpr)
 
2168
 
1341
2169
    def __getattribute__(self, name):
1342
 
        if(name == '_pipe'):
 
2170
        if name == '_pipe':
1343
2171
            return super(ProxyClient, self).__getattribute__(name)
1344
2172
        self._pipe.send(('getattr', name))
1345
2173
        data = self._pipe.recv()
1346
2174
        if data[0] == 'data':
1347
2175
            return data[1]
1348
2176
        if data[0] == 'function':
 
2177
 
1349
2178
            def func(*args, **kwargs):
1350
2179
                self._pipe.send(('funcall', name, args, kwargs))
1351
2180
                return self._pipe.recv()[1]
 
2181
 
1352
2182
            return func
1353
 
    
 
2183
 
1354
2184
    def __setattr__(self, name, value):
1355
 
        if(name == '_pipe'):
 
2185
        if name == '_pipe':
1356
2186
            return super(ProxyClient, self).__setattr__(name, value)
1357
2187
        self._pipe.send(('setattr', name, value))
1358
2188
 
1359
 
class ClientDBusTransitional(ClientDBus):
1360
 
    __metaclass__ = AlternateDBusNamesMetaclass
1361
2189
 
1362
2190
class ClientHandler(socketserver.BaseRequestHandler, object):
1363
2191
    """A class to handle client connections.
1364
 
    
 
2192
 
1365
2193
    Instantiated once for each connection to handle it.
1366
2194
    Note: This will run in its own forked process."""
1367
 
    
 
2195
 
1368
2196
    def handle(self):
1369
2197
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1370
2198
            logger.info("TCP connection from: %s",
1371
 
                        unicode(self.client_address))
 
2199
                        str(self.client_address))
1372
2200
            logger.debug("Pipe FD: %d",
1373
2201
                         self.server.child_pipe.fileno())
1374
 
            
1375
 
            session = (gnutls.connection
1376
 
                       .ClientSession(self.request,
1377
 
                                      gnutls.connection
1378
 
                                      .X509Credentials()))
1379
 
            
1380
 
            # Note: gnutls.connection.X509Credentials is really a
1381
 
            # generic GnuTLS certificate credentials object so long as
1382
 
            # no X.509 keys are added to it.  Therefore, we can use it
1383
 
            # here despite using OpenPGP certificates.
1384
 
            
1385
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1386
 
            #                      "+AES-256-CBC", "+SHA1",
1387
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1388
 
            #                      "+DHE-DSS"))
 
2202
 
 
2203
            session = gnutls.ClientSession(self.request)
 
2204
 
 
2205
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
2206
            #                       "+AES-256-CBC", "+SHA1",
 
2207
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
 
2208
            #                       "+DHE-DSS"))
1389
2209
            # Use a fallback default, since this MUST be set.
1390
2210
            priority = self.server.gnutls_priority
1391
2211
            if priority is None:
1392
2212
                priority = "NORMAL"
1393
 
            (gnutls.library.functions
1394
 
             .gnutls_priority_set_direct(session._c_object,
1395
 
                                         priority, None))
1396
 
            
 
2213
            gnutls.priority_set_direct(session._c_object,
 
2214
                                       priority.encode("utf-8"),
 
2215
                                       None)
 
2216
 
1397
2217
            # Start communication using the Mandos protocol
1398
2218
            # Get protocol number
1399
2219
            line = self.request.makefile().readline()
1400
2220
            logger.debug("Protocol version: %r", line)
1401
2221
            try:
1402
2222
                if int(line.strip().split()[0]) > 1:
1403
 
                    raise RuntimeError
 
2223
                    raise RuntimeError(line)
1404
2224
            except (ValueError, IndexError, RuntimeError) as error:
1405
2225
                logger.error("Unknown protocol version: %s", error)
1406
2226
                return
1407
 
            
 
2227
 
1408
2228
            # Start GnuTLS connection
1409
2229
            try:
1410
2230
                session.handshake()
1411
 
            except gnutls.errors.GNUTLSError as error:
 
2231
            except gnutls.Error as error:
1412
2232
                logger.warning("Handshake failed: %s", error)
1413
2233
                # Do not run session.bye() here: the session is not
1414
2234
                # established.  Just abandon the request.
1415
2235
                return
1416
2236
            logger.debug("Handshake succeeded")
1417
 
            
 
2237
 
1418
2238
            approval_required = False
1419
2239
            try:
1420
2240
                try:
1421
 
                    fpr = self.fingerprint(self.peer_certificate
1422
 
                                           (session))
1423
 
                except (TypeError,
1424
 
                        gnutls.errors.GNUTLSError) as error:
 
2241
                    fpr = self.fingerprint(
 
2242
                        self.peer_certificate(session))
 
2243
                except (TypeError, gnutls.Error) as error:
1425
2244
                    logger.warning("Bad certificate: %s", error)
1426
2245
                    return
1427
2246
                logger.debug("Fingerprint: %s", fpr)
1428
 
                
 
2247
 
1429
2248
                try:
1430
2249
                    client = ProxyClient(child_pipe, fpr,
1431
2250
                                         self.client_address)
1432
2251
                except KeyError:
1433
2252
                    return
1434
 
                
 
2253
 
1435
2254
                if client.approval_delay:
1436
2255
                    delay = client.approval_delay
1437
2256
                    client.approvals_pending += 1
1438
2257
                    approval_required = True
1439
 
                
 
2258
 
1440
2259
                while True:
1441
2260
                    if not client.enabled:
1442
2261
                        logger.info("Client %s is disabled",
1443
 
                                       client.name)
 
2262
                                    client.name)
1444
2263
                        if self.server.use_dbus:
1445
2264
                            # Emit D-Bus signal
1446
2265
                            client.Rejected("Disabled")
1447
2266
                        return
1448
 
                    
1449
 
                    if client._approved or not client.approval_delay:
1450
 
                        #We are approved or approval is disabled
 
2267
 
 
2268
                    if client.approved or not client.approval_delay:
 
2269
                        # We are approved or approval is disabled
1451
2270
                        break
1452
 
                    elif client._approved is None:
 
2271
                    elif client.approved is None:
1453
2272
                        logger.info("Client %s needs approval",
1454
2273
                                    client.name)
1455
2274
                        if self.server.use_dbus:
1456
2275
                            # Emit D-Bus signal
1457
2276
                            client.NeedApproval(
1458
 
                                client.approval_delay_milliseconds(),
1459
 
                                client.approved_by_default)
 
2277
                                client.approval_delay.total_seconds()
 
2278
                                * 1000, client.approved_by_default)
1460
2279
                    else:
1461
2280
                        logger.warning("Client %s was not approved",
1462
2281
                                       client.name)
1464
2283
                            # Emit D-Bus signal
1465
2284
                            client.Rejected("Denied")
1466
2285
                        return
1467
 
                    
1468
 
                    #wait until timeout or approved
 
2286
 
 
2287
                    # wait until timeout or approved
1469
2288
                    time = datetime.datetime.now()
1470
2289
                    client.changedstate.acquire()
1471
 
                    (client.changedstate.wait
1472
 
                     (float(client._timedelta_to_milliseconds(delay)
1473
 
                            / 1000)))
 
2290
                    client.changedstate.wait(delay.total_seconds())
1474
2291
                    client.changedstate.release()
1475
2292
                    time2 = datetime.datetime.now()
1476
2293
                    if (time2 - time) >= delay:
1486
2303
                            break
1487
2304
                    else:
1488
2305
                        delay -= time2 - time
1489
 
                
1490
 
                sent_size = 0
1491
 
                while sent_size < len(client.secret):
1492
 
                    try:
1493
 
                        sent = session.send(client.secret[sent_size:])
1494
 
                    except gnutls.errors.GNUTLSError as error:
1495
 
                        logger.warning("gnutls send failed")
1496
 
                        return
1497
 
                    logger.debug("Sent: %d, remaining: %d",
1498
 
                                 sent, len(client.secret)
1499
 
                                 - (sent_size + sent))
1500
 
                    sent_size += sent
1501
 
                
 
2306
 
 
2307
                try:
 
2308
                    session.send(client.secret)
 
2309
                except gnutls.Error as error:
 
2310
                    logger.warning("gnutls send failed",
 
2311
                                   exc_info=error)
 
2312
                    return
 
2313
 
1502
2314
                logger.info("Sending secret to %s", client.name)
1503
2315
                # bump the timeout using extended_timeout
1504
 
                client.checked_ok(client.extended_timeout)
 
2316
                client.bump_timeout(client.extended_timeout)
1505
2317
                if self.server.use_dbus:
1506
2318
                    # Emit D-Bus signal
1507
2319
                    client.GotSecret()
1508
 
            
 
2320
 
1509
2321
            finally:
1510
2322
                if approval_required:
1511
2323
                    client.approvals_pending -= 1
1512
2324
                try:
1513
2325
                    session.bye()
1514
 
                except gnutls.errors.GNUTLSError as error:
1515
 
                    logger.warning("GnuTLS bye failed")
1516
 
    
 
2326
                except gnutls.Error as error:
 
2327
                    logger.warning("GnuTLS bye failed",
 
2328
                                   exc_info=error)
 
2329
 
1517
2330
    @staticmethod
1518
2331
    def peer_certificate(session):
1519
2332
        "Return the peer's OpenPGP certificate as a bytestring"
1520
2333
        # If not an OpenPGP certificate...
1521
 
        if (gnutls.library.functions
1522
 
            .gnutls_certificate_type_get(session._c_object)
1523
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1524
 
            # ...do the normal thing
1525
 
            return session.peer_certificate
 
2334
        if (gnutls.certificate_type_get(session._c_object)
 
2335
            != gnutls.CRT_OPENPGP):
 
2336
            # ...return invalid data
 
2337
            return b""
1526
2338
        list_size = ctypes.c_uint(1)
1527
 
        cert_list = (gnutls.library.functions
1528
 
                     .gnutls_certificate_get_peers
 
2339
        cert_list = (gnutls.certificate_get_peers
1529
2340
                     (session._c_object, ctypes.byref(list_size)))
1530
2341
        if not bool(cert_list) and list_size.value != 0:
1531
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1532
 
                                            " certificate")
 
2342
            raise gnutls.Error("error getting peer certificate")
1533
2343
        if list_size.value == 0:
1534
2344
            return None
1535
2345
        cert = cert_list[0]
1536
2346
        return ctypes.string_at(cert.data, cert.size)
1537
 
    
 
2347
 
1538
2348
    @staticmethod
1539
2349
    def fingerprint(openpgp):
1540
2350
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1541
2351
        # New GnuTLS "datum" with the OpenPGP public key
1542
 
        datum = (gnutls.library.types
1543
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1544
 
                                             ctypes.POINTER
1545
 
                                             (ctypes.c_ubyte)),
1546
 
                                 ctypes.c_uint(len(openpgp))))
 
2352
        datum = gnutls.datum_t(
 
2353
            ctypes.cast(ctypes.c_char_p(openpgp),
 
2354
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2355
            ctypes.c_uint(len(openpgp)))
1547
2356
        # New empty GnuTLS certificate
1548
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1549
 
        (gnutls.library.functions
1550
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
2357
        crt = gnutls.openpgp_crt_t()
 
2358
        gnutls.openpgp_crt_init(ctypes.byref(crt))
1551
2359
        # Import the OpenPGP public key into the certificate
1552
 
        (gnutls.library.functions
1553
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1554
 
                                    gnutls.library.constants
1555
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
2360
        gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
 
2361
                                  gnutls.OPENPGP_FMT_RAW)
1556
2362
        # Verify the self signature in the key
1557
2363
        crtverify = ctypes.c_uint()
1558
 
        (gnutls.library.functions
1559
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1560
 
                                         ctypes.byref(crtverify)))
 
2364
        gnutls.openpgp_crt_verify_self(crt, 0,
 
2365
                                       ctypes.byref(crtverify))
1561
2366
        if crtverify.value != 0:
1562
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1563
 
            raise (gnutls.errors.CertificateSecurityError
1564
 
                   ("Verify failed"))
 
2367
            gnutls.openpgp_crt_deinit(crt)
 
2368
            raise gnutls.CertificateSecurityError("Verify failed")
1565
2369
        # New buffer for the fingerprint
1566
2370
        buf = ctypes.create_string_buffer(20)
1567
2371
        buf_len = ctypes.c_size_t()
1568
2372
        # Get the fingerprint from the certificate into the buffer
1569
 
        (gnutls.library.functions
1570
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1571
 
                                             ctypes.byref(buf_len)))
 
2373
        gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
2374
                                           ctypes.byref(buf_len))
1572
2375
        # Deinit the certificate
1573
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
2376
        gnutls.openpgp_crt_deinit(crt)
1574
2377
        # Convert the buffer to a Python bytestring
1575
2378
        fpr = ctypes.string_at(buf, buf_len.value)
1576
2379
        # Convert the bytestring to hexadecimal notation
1577
 
        hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
 
2380
        hex_fpr = binascii.hexlify(fpr).upper()
1578
2381
        return hex_fpr
1579
2382
 
1580
2383
 
1581
2384
class MultiprocessingMixIn(object):
1582
2385
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
2386
 
1583
2387
    def sub_process_main(self, request, address):
1584
2388
        try:
1585
2389
            self.finish_request(request, address)
1586
 
        except:
 
2390
        except Exception:
1587
2391
            self.handle_error(request, address)
1588
2392
        self.close_request(request)
1589
 
    
 
2393
 
1590
2394
    def process_request(self, request, address):
1591
2395
        """Start a new process to process the request."""
1592
 
        proc = multiprocessing.Process(target = self.sub_process_main,
1593
 
                                       args = (request,
1594
 
                                               address))
 
2396
        proc = multiprocessing.Process(target=self.sub_process_main,
 
2397
                                       args=(request, address))
1595
2398
        proc.start()
1596
2399
        return proc
1597
2400
 
1598
2401
 
1599
2402
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1600
2403
    """ adds a pipe to the MixIn """
 
2404
 
1601
2405
    def process_request(self, request, client_address):
1602
2406
        """Overrides and wraps the original process_request().
1603
 
        
 
2407
 
1604
2408
        This function creates a new pipe in self.pipe
1605
2409
        """
1606
2410
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1607
 
        
 
2411
 
1608
2412
        proc = MultiprocessingMixIn.process_request(self, request,
1609
2413
                                                    client_address)
1610
2414
        self.child_pipe.close()
1611
2415
        self.add_pipe(parent_pipe, proc)
1612
 
    
 
2416
 
1613
2417
    def add_pipe(self, parent_pipe, proc):
1614
2418
        """Dummy function; override as necessary"""
1615
 
        raise NotImplementedError
 
2419
        raise NotImplementedError()
1616
2420
 
1617
2421
 
1618
2422
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1619
2423
                     socketserver.TCPServer, object):
1620
2424
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1621
 
    
 
2425
 
1622
2426
    Attributes:
1623
2427
        enabled:        Boolean; whether this server is activated yet
1624
2428
        interface:      None or a network interface name (string)
1625
2429
        use_ipv6:       Boolean; to use IPv6 or not
1626
2430
    """
 
2431
 
1627
2432
    def __init__(self, server_address, RequestHandlerClass,
1628
 
                 interface=None, use_ipv6=True):
 
2433
                 interface=None,
 
2434
                 use_ipv6=True,
 
2435
                 socketfd=None):
 
2436
        """If socketfd is set, use that file descriptor instead of
 
2437
        creating a new one with socket.socket().
 
2438
        """
1629
2439
        self.interface = interface
1630
2440
        if use_ipv6:
1631
2441
            self.address_family = socket.AF_INET6
 
2442
        if socketfd is not None:
 
2443
            # Save the file descriptor
 
2444
            self.socketfd = socketfd
 
2445
            # Save the original socket.socket() function
 
2446
            self.socket_socket = socket.socket
 
2447
 
 
2448
            # To implement --socket, we monkey patch socket.socket.
 
2449
            #
 
2450
            # (When socketserver.TCPServer is a new-style class, we
 
2451
            # could make self.socket into a property instead of monkey
 
2452
            # patching socket.socket.)
 
2453
            #
 
2454
            # Create a one-time-only replacement for socket.socket()
 
2455
            @functools.wraps(socket.socket)
 
2456
            def socket_wrapper(*args, **kwargs):
 
2457
                # Restore original function so subsequent calls are
 
2458
                # not affected.
 
2459
                socket.socket = self.socket_socket
 
2460
                del self.socket_socket
 
2461
                # This time only, return a new socket object from the
 
2462
                # saved file descriptor.
 
2463
                return socket.fromfd(self.socketfd, *args, **kwargs)
 
2464
            # Replace socket.socket() function with wrapper
 
2465
            socket.socket = socket_wrapper
 
2466
        # The socketserver.TCPServer.__init__ will call
 
2467
        # socket.socket(), which might be our replacement,
 
2468
        # socket_wrapper(), if socketfd was set.
1632
2469
        socketserver.TCPServer.__init__(self, server_address,
1633
2470
                                        RequestHandlerClass)
 
2471
 
1634
2472
    def server_bind(self):
1635
2473
        """This overrides the normal server_bind() function
1636
2474
        to bind to an interface if one was specified, and also NOT to
1637
2475
        bind to an address or port if they were not specified."""
 
2476
        global SO_BINDTODEVICE
1638
2477
        if self.interface is not None:
1639
2478
            if SO_BINDTODEVICE is None:
1640
 
                logger.error("SO_BINDTODEVICE does not exist;"
1641
 
                             " cannot bind to interface %s",
1642
 
                             self.interface)
1643
 
            else:
1644
 
                try:
1645
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1646
 
                                           SO_BINDTODEVICE,
1647
 
                                           str(self.interface
1648
 
                                               + '\0'))
1649
 
                except socket.error as error:
1650
 
                    if error[0] == errno.EPERM:
1651
 
                        logger.error("No permission to"
1652
 
                                     " bind to interface %s",
1653
 
                                     self.interface)
1654
 
                    elif error[0] == errno.ENOPROTOOPT:
1655
 
                        logger.error("SO_BINDTODEVICE not available;"
1656
 
                                     " cannot bind to interface %s",
1657
 
                                     self.interface)
1658
 
                    else:
1659
 
                        raise
 
2479
                # Fall back to a hard-coded value which seems to be
 
2480
                # common enough.
 
2481
                logger.warning("SO_BINDTODEVICE not found, trying 25")
 
2482
                SO_BINDTODEVICE = 25
 
2483
            try:
 
2484
                self.socket.setsockopt(
 
2485
                    socket.SOL_SOCKET, SO_BINDTODEVICE,
 
2486
                    (self.interface + "\0").encode("utf-8"))
 
2487
            except socket.error as error:
 
2488
                if error.errno == errno.EPERM:
 
2489
                    logger.error("No permission to bind to"
 
2490
                                 " interface %s", self.interface)
 
2491
                elif error.errno == errno.ENOPROTOOPT:
 
2492
                    logger.error("SO_BINDTODEVICE not available;"
 
2493
                                 " cannot bind to interface %s",
 
2494
                                 self.interface)
 
2495
                elif error.errno == errno.ENODEV:
 
2496
                    logger.error("Interface %s does not exist,"
 
2497
                                 " cannot bind", self.interface)
 
2498
                else:
 
2499
                    raise
1660
2500
        # Only bind(2) the socket if we really need to.
1661
2501
        if self.server_address[0] or self.server_address[1]:
1662
2502
            if not self.server_address[0]:
1663
2503
                if self.address_family == socket.AF_INET6:
1664
 
                    any_address = "::" # in6addr_any
 
2504
                    any_address = "::"  # in6addr_any
1665
2505
                else:
1666
 
                    any_address = socket.INADDR_ANY
 
2506
                    any_address = "0.0.0.0"  # INADDR_ANY
1667
2507
                self.server_address = (any_address,
1668
2508
                                       self.server_address[1])
1669
2509
            elif not self.server_address[1]:
1670
 
                self.server_address = (self.server_address[0],
1671
 
                                       0)
 
2510
                self.server_address = (self.server_address[0], 0)
1672
2511
#                 if self.interface:
1673
2512
#                     self.server_address = (self.server_address[0],
1674
2513
#                                            0, # port
1680
2519
 
1681
2520
class MandosServer(IPv6_TCPServer):
1682
2521
    """Mandos server.
1683
 
    
 
2522
 
1684
2523
    Attributes:
1685
2524
        clients:        set of Client objects
1686
2525
        gnutls_priority GnuTLS priority string
1687
2526
        use_dbus:       Boolean; to emit D-Bus signals or not
1688
 
    
1689
 
    Assumes a gobject.MainLoop event loop.
 
2527
 
 
2528
    Assumes a GLib.MainLoop event loop.
1690
2529
    """
 
2530
 
1691
2531
    def __init__(self, server_address, RequestHandlerClass,
1692
 
                 interface=None, use_ipv6=True, clients=None,
1693
 
                 gnutls_priority=None, use_dbus=True):
 
2532
                 interface=None,
 
2533
                 use_ipv6=True,
 
2534
                 clients=None,
 
2535
                 gnutls_priority=None,
 
2536
                 use_dbus=True,
 
2537
                 socketfd=None):
1694
2538
        self.enabled = False
1695
2539
        self.clients = clients
1696
2540
        if self.clients is None:
1699
2543
        self.gnutls_priority = gnutls_priority
1700
2544
        IPv6_TCPServer.__init__(self, server_address,
1701
2545
                                RequestHandlerClass,
1702
 
                                interface = interface,
1703
 
                                use_ipv6 = use_ipv6)
 
2546
                                interface=interface,
 
2547
                                use_ipv6=use_ipv6,
 
2548
                                socketfd=socketfd)
 
2549
 
1704
2550
    def server_activate(self):
1705
2551
        if self.enabled:
1706
2552
            return socketserver.TCPServer.server_activate(self)
1707
 
    
 
2553
 
1708
2554
    def enable(self):
1709
2555
        self.enabled = True
1710
 
    
 
2556
 
1711
2557
    def add_pipe(self, parent_pipe, proc):
1712
2558
        # Call "handle_ipc" for both data and EOF events
1713
 
        gobject.io_add_watch(parent_pipe.fileno(),
1714
 
                             gobject.IO_IN | gobject.IO_HUP,
1715
 
                             functools.partial(self.handle_ipc,
1716
 
                                               parent_pipe =
1717
 
                                               parent_pipe,
1718
 
                                               proc = proc))
1719
 
    
1720
 
    def handle_ipc(self, source, condition, parent_pipe=None,
1721
 
                   proc = None, client_object=None):
1722
 
        condition_names = {
1723
 
            gobject.IO_IN: "IN",   # There is data to read.
1724
 
            gobject.IO_OUT: "OUT", # Data can be written (without
1725
 
                                    # blocking).
1726
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
1727
 
            gobject.IO_ERR: "ERR", # Error condition.
1728
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
1729
 
                                    # broken, usually for pipes and
1730
 
                                    # sockets).
1731
 
            }
1732
 
        conditions_string = ' | '.join(name
1733
 
                                       for cond, name in
1734
 
                                       condition_names.iteritems()
1735
 
                                       if cond & condition)
 
2559
        GLib.io_add_watch(
 
2560
            parent_pipe.fileno(),
 
2561
            GLib.IO_IN | GLib.IO_HUP,
 
2562
            functools.partial(self.handle_ipc,
 
2563
                              parent_pipe=parent_pipe,
 
2564
                              proc=proc))
 
2565
 
 
2566
    def handle_ipc(self, source, condition,
 
2567
                   parent_pipe=None,
 
2568
                   proc=None,
 
2569
                   client_object=None):
1736
2570
        # error, or the other end of multiprocessing.Pipe has closed
1737
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
 
2571
        if condition & (GLib.IO_ERR | GLib.IO_HUP):
1738
2572
            # Wait for other process to exit
1739
2573
            proc.join()
1740
2574
            return False
1741
 
        
 
2575
 
1742
2576
        # Read a request from the child
1743
2577
        request = parent_pipe.recv()
1744
2578
        command = request[0]
1745
 
        
 
2579
 
1746
2580
        if command == 'init':
1747
 
            fpr = request[1]
 
2581
            fpr = request[1].decode("ascii")
1748
2582
            address = request[2]
1749
 
            
1750
 
            for c in self.clients.itervalues():
 
2583
 
 
2584
            for c in self.clients.values():
1751
2585
                if c.fingerprint == fpr:
1752
2586
                    client = c
1753
2587
                    break
1760
2594
                                                       address[0])
1761
2595
                parent_pipe.send(False)
1762
2596
                return False
1763
 
            
1764
 
            gobject.io_add_watch(parent_pipe.fileno(),
1765
 
                                 gobject.IO_IN | gobject.IO_HUP,
1766
 
                                 functools.partial(self.handle_ipc,
1767
 
                                                   parent_pipe =
1768
 
                                                   parent_pipe,
1769
 
                                                   proc = proc,
1770
 
                                                   client_object =
1771
 
                                                   client))
 
2597
 
 
2598
            GLib.io_add_watch(
 
2599
                parent_pipe.fileno(),
 
2600
                GLib.IO_IN | GLib.IO_HUP,
 
2601
                functools.partial(self.handle_ipc,
 
2602
                                  parent_pipe=parent_pipe,
 
2603
                                  proc=proc,
 
2604
                                  client_object=client))
1772
2605
            parent_pipe.send(True)
1773
2606
            # remove the old hook in favor of the new above hook on
1774
2607
            # same fileno
1777
2610
            funcname = request[1]
1778
2611
            args = request[2]
1779
2612
            kwargs = request[3]
1780
 
            
 
2613
 
1781
2614
            parent_pipe.send(('data', getattr(client_object,
1782
2615
                                              funcname)(*args,
1783
 
                                                         **kwargs)))
1784
 
        
 
2616
                                                        **kwargs)))
 
2617
 
1785
2618
        if command == 'getattr':
1786
2619
            attrname = request[1]
1787
 
            if callable(client_object.__getattribute__(attrname)):
1788
 
                parent_pipe.send(('function',))
 
2620
            if isinstance(client_object.__getattribute__(attrname),
 
2621
                          collections.Callable):
 
2622
                parent_pipe.send(('function', ))
1789
2623
            else:
1790
 
                parent_pipe.send(('data', client_object
1791
 
                                  .__getattribute__(attrname)))
1792
 
        
 
2624
                parent_pipe.send((
 
2625
                    'data', client_object.__getattribute__(attrname)))
 
2626
 
1793
2627
        if command == 'setattr':
1794
2628
            attrname = request[1]
1795
2629
            value = request[2]
1796
2630
            setattr(client_object, attrname, value)
1797
 
        
 
2631
 
1798
2632
        return True
1799
2633
 
1800
2634
 
 
2635
def rfc3339_duration_to_delta(duration):
 
2636
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
 
2637
 
 
2638
    >>> rfc3339_duration_to_delta("P7D")
 
2639
    datetime.timedelta(7)
 
2640
    >>> rfc3339_duration_to_delta("PT60S")
 
2641
    datetime.timedelta(0, 60)
 
2642
    >>> rfc3339_duration_to_delta("PT60M")
 
2643
    datetime.timedelta(0, 3600)
 
2644
    >>> rfc3339_duration_to_delta("PT24H")
 
2645
    datetime.timedelta(1)
 
2646
    >>> rfc3339_duration_to_delta("P1W")
 
2647
    datetime.timedelta(7)
 
2648
    >>> rfc3339_duration_to_delta("PT5M30S")
 
2649
    datetime.timedelta(0, 330)
 
2650
    >>> rfc3339_duration_to_delta("P1DT3M20S")
 
2651
    datetime.timedelta(1, 200)
 
2652
    """
 
2653
 
 
2654
    # Parsing an RFC 3339 duration with regular expressions is not
 
2655
    # possible - there would have to be multiple places for the same
 
2656
    # values, like seconds.  The current code, while more esoteric, is
 
2657
    # cleaner without depending on a parsing library.  If Python had a
 
2658
    # built-in library for parsing we would use it, but we'd like to
 
2659
    # avoid excessive use of external libraries.
 
2660
 
 
2661
    # New type for defining tokens, syntax, and semantics all-in-one
 
2662
    Token = collections.namedtuple("Token", (
 
2663
        "regexp",  # To match token; if "value" is not None, must have
 
2664
                   # a "group" containing digits
 
2665
        "value",   # datetime.timedelta or None
 
2666
        "followers"))           # Tokens valid after this token
 
2667
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
 
2668
    # the "duration" ABNF definition in RFC 3339, Appendix A.
 
2669
    token_end = Token(re.compile(r"$"), None, frozenset())
 
2670
    token_second = Token(re.compile(r"(\d+)S"),
 
2671
                         datetime.timedelta(seconds=1),
 
2672
                         frozenset((token_end, )))
 
2673
    token_minute = Token(re.compile(r"(\d+)M"),
 
2674
                         datetime.timedelta(minutes=1),
 
2675
                         frozenset((token_second, token_end)))
 
2676
    token_hour = Token(re.compile(r"(\d+)H"),
 
2677
                       datetime.timedelta(hours=1),
 
2678
                       frozenset((token_minute, token_end)))
 
2679
    token_time = Token(re.compile(r"T"),
 
2680
                       None,
 
2681
                       frozenset((token_hour, token_minute,
 
2682
                                  token_second)))
 
2683
    token_day = Token(re.compile(r"(\d+)D"),
 
2684
                      datetime.timedelta(days=1),
 
2685
                      frozenset((token_time, token_end)))
 
2686
    token_month = Token(re.compile(r"(\d+)M"),
 
2687
                        datetime.timedelta(weeks=4),
 
2688
                        frozenset((token_day, token_end)))
 
2689
    token_year = Token(re.compile(r"(\d+)Y"),
 
2690
                       datetime.timedelta(weeks=52),
 
2691
                       frozenset((token_month, token_end)))
 
2692
    token_week = Token(re.compile(r"(\d+)W"),
 
2693
                       datetime.timedelta(weeks=1),
 
2694
                       frozenset((token_end, )))
 
2695
    token_duration = Token(re.compile(r"P"), None,
 
2696
                           frozenset((token_year, token_month,
 
2697
                                      token_day, token_time,
 
2698
                                      token_week)))
 
2699
    # Define starting values:
 
2700
    # Value so far
 
2701
    value = datetime.timedelta()
 
2702
    found_token = None
 
2703
    # Following valid tokens
 
2704
    followers = frozenset((token_duration, ))
 
2705
    # String left to parse
 
2706
    s = duration
 
2707
    # Loop until end token is found
 
2708
    while found_token is not token_end:
 
2709
        # Search for any currently valid tokens
 
2710
        for token in followers:
 
2711
            match = token.regexp.match(s)
 
2712
            if match is not None:
 
2713
                # Token found
 
2714
                if token.value is not None:
 
2715
                    # Value found, parse digits
 
2716
                    factor = int(match.group(1), 10)
 
2717
                    # Add to value so far
 
2718
                    value += factor * token.value
 
2719
                # Strip token from string
 
2720
                s = token.regexp.sub("", s, 1)
 
2721
                # Go to found token
 
2722
                found_token = token
 
2723
                # Set valid next tokens
 
2724
                followers = found_token.followers
 
2725
                break
 
2726
        else:
 
2727
            # No currently valid tokens were found
 
2728
            raise ValueError("Invalid RFC 3339 duration: {!r}"
 
2729
                             .format(duration))
 
2730
    # End token found
 
2731
    return value
 
2732
 
 
2733
 
1801
2734
def string_to_delta(interval):
1802
2735
    """Parse a string and return a datetime.timedelta
1803
 
    
 
2736
 
1804
2737
    >>> string_to_delta('7d')
1805
2738
    datetime.timedelta(7)
1806
2739
    >>> string_to_delta('60s')
1814
2747
    >>> string_to_delta('5m 30s')
1815
2748
    datetime.timedelta(0, 330)
1816
2749
    """
 
2750
 
 
2751
    try:
 
2752
        return rfc3339_duration_to_delta(interval)
 
2753
    except ValueError:
 
2754
        pass
 
2755
 
1817
2756
    timevalue = datetime.timedelta(0)
1818
2757
    for s in interval.split():
1819
2758
        try:
1820
 
            suffix = unicode(s[-1])
 
2759
            suffix = s[-1]
1821
2760
            value = int(s[:-1])
1822
2761
            if suffix == "d":
1823
2762
                delta = datetime.timedelta(value)
1830
2769
            elif suffix == "w":
1831
2770
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1832
2771
            else:
1833
 
                raise ValueError("Unknown suffix %r" % suffix)
1834
 
        except (ValueError, IndexError) as e:
 
2772
                raise ValueError("Unknown suffix {!r}".format(suffix))
 
2773
        except IndexError as e:
1835
2774
            raise ValueError(*(e.args))
1836
2775
        timevalue += delta
1837
2776
    return timevalue
1838
2777
 
1839
2778
 
1840
 
def if_nametoindex(interface):
1841
 
    """Call the C function if_nametoindex(), or equivalent
1842
 
    
1843
 
    Note: This function cannot accept a unicode string."""
1844
 
    global if_nametoindex
1845
 
    try:
1846
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1847
 
                          (ctypes.util.find_library("c"))
1848
 
                          .if_nametoindex)
1849
 
    except (OSError, AttributeError):
1850
 
        logger.warning("Doing if_nametoindex the hard way")
1851
 
        def if_nametoindex(interface):
1852
 
            "Get an interface index the hard way, i.e. using fcntl()"
1853
 
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1854
 
            with contextlib.closing(socket.socket()) as s:
1855
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1856
 
                                    struct.pack(str("16s16x"),
1857
 
                                                interface))
1858
 
            interface_index = struct.unpack(str("I"),
1859
 
                                            ifreq[16:20])[0]
1860
 
            return interface_index
1861
 
    return if_nametoindex(interface)
1862
 
 
1863
 
 
1864
 
def daemon(nochdir = False, noclose = False):
 
2779
def daemon(nochdir=False, noclose=False):
1865
2780
    """See daemon(3).  Standard BSD Unix function.
1866
 
    
 
2781
 
1867
2782
    This should really exist as os.daemon, but it doesn't (yet)."""
1868
2783
    if os.fork():
1869
2784
        sys.exit()
1874
2789
        sys.exit()
1875
2790
    if not noclose:
1876
2791
        # Close all standard open file descriptors
1877
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
2792
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1878
2793
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1879
2794
            raise OSError(errno.ENODEV,
1880
 
                          "%s not a character device"
1881
 
                          % os.path.devnull)
 
2795
                          "{} not a character device"
 
2796
                          .format(os.devnull))
1882
2797
        os.dup2(null, sys.stdin.fileno())
1883
2798
        os.dup2(null, sys.stdout.fileno())
1884
2799
        os.dup2(null, sys.stderr.fileno())
1887
2802
 
1888
2803
 
1889
2804
def main():
1890
 
    
 
2805
 
1891
2806
    ##################################################################
1892
2807
    # Parsing of options, both command line and config file
1893
 
    
 
2808
 
1894
2809
    parser = argparse.ArgumentParser()
1895
2810
    parser.add_argument("-v", "--version", action="version",
1896
 
                        version = "%%(prog)s %s" % version,
 
2811
                        version="%(prog)s {}".format(version),
1897
2812
                        help="show version number and exit")
1898
2813
    parser.add_argument("-i", "--interface", metavar="IF",
1899
2814
                        help="Bind to interface IF")
1905
2820
                        help="Run self-test")
1906
2821
    parser.add_argument("--debug", action="store_true",
1907
2822
                        help="Debug mode; run in foreground and log"
1908
 
                        " to terminal")
 
2823
                        " to terminal", default=None)
1909
2824
    parser.add_argument("--debuglevel", metavar="LEVEL",
1910
2825
                        help="Debug level for stdout output")
1911
2826
    parser.add_argument("--priority", help="GnuTLS"
1918
2833
                        " files")
1919
2834
    parser.add_argument("--no-dbus", action="store_false",
1920
2835
                        dest="use_dbus", help="Do not provide D-Bus"
1921
 
                        " system bus interface")
 
2836
                        " system bus interface", default=None)
1922
2837
    parser.add_argument("--no-ipv6", action="store_false",
1923
 
                        dest="use_ipv6", help="Do not use IPv6")
 
2838
                        dest="use_ipv6", help="Do not use IPv6",
 
2839
                        default=None)
1924
2840
    parser.add_argument("--no-restore", action="store_false",
1925
 
                        dest="restore", help="Do not restore stored state",
1926
 
                        default=True)
 
2841
                        dest="restore", help="Do not restore stored"
 
2842
                        " state", default=None)
 
2843
    parser.add_argument("--socket", type=int,
 
2844
                        help="Specify a file descriptor to a network"
 
2845
                        " socket to use instead of creating one")
 
2846
    parser.add_argument("--statedir", metavar="DIR",
 
2847
                        help="Directory to save/restore state in")
 
2848
    parser.add_argument("--foreground", action="store_true",
 
2849
                        help="Run in foreground", default=None)
 
2850
    parser.add_argument("--no-zeroconf", action="store_false",
 
2851
                        dest="zeroconf", help="Do not use Zeroconf",
 
2852
                        default=None)
1927
2853
 
1928
2854
    options = parser.parse_args()
1929
 
    
 
2855
 
1930
2856
    if options.check:
1931
2857
        import doctest
1932
 
        doctest.testmod()
1933
 
        sys.exit()
1934
 
    
 
2858
        fail_count, test_count = doctest.testmod()
 
2859
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
2860
 
1935
2861
    # Default values for config file for server-global settings
1936
 
    server_defaults = { "interface": "",
1937
 
                        "address": "",
1938
 
                        "port": "",
1939
 
                        "debug": "False",
1940
 
                        "priority":
1941
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1942
 
                        "servicename": "Mandos",
1943
 
                        "use_dbus": "True",
1944
 
                        "use_ipv6": "True",
1945
 
                        "debuglevel": "",
1946
 
                        }
1947
 
    
 
2862
    server_defaults = {"interface": "",
 
2863
                       "address": "",
 
2864
                       "port": "",
 
2865
                       "debug": "False",
 
2866
                       "priority":
 
2867
                       "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
2868
                       ":+SIGN-DSA-SHA256",
 
2869
                       "servicename": "Mandos",
 
2870
                       "use_dbus": "True",
 
2871
                       "use_ipv6": "True",
 
2872
                       "debuglevel": "",
 
2873
                       "restore": "True",
 
2874
                       "socket": "",
 
2875
                       "statedir": "/var/lib/mandos",
 
2876
                       "foreground": "False",
 
2877
                       "zeroconf": "True",
 
2878
                       }
 
2879
 
1948
2880
    # Parse config file for server-global settings
1949
2881
    server_config = configparser.SafeConfigParser(server_defaults)
1950
2882
    del server_defaults
1951
 
    server_config.read(os.path.join(options.configdir,
1952
 
                                    "mandos.conf"))
 
2883
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1953
2884
    # Convert the SafeConfigParser object to a dict
1954
2885
    server_settings = server_config.defaults()
1955
2886
    # Use the appropriate methods on the non-string config options
1956
 
    for option in ("debug", "use_dbus", "use_ipv6"):
 
2887
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
2888
                   "foreground", "zeroconf"):
1957
2889
        server_settings[option] = server_config.getboolean("DEFAULT",
1958
2890
                                                           option)
1959
2891
    if server_settings["port"]:
1960
2892
        server_settings["port"] = server_config.getint("DEFAULT",
1961
2893
                                                       "port")
 
2894
    if server_settings["socket"]:
 
2895
        server_settings["socket"] = server_config.getint("DEFAULT",
 
2896
                                                         "socket")
 
2897
        # Later, stdin will, and stdout and stderr might, be dup'ed
 
2898
        # over with an opened os.devnull.  But we don't want this to
 
2899
        # happen with a supplied network socket.
 
2900
        if 0 <= server_settings["socket"] <= 2:
 
2901
            server_settings["socket"] = os.dup(server_settings
 
2902
                                               ["socket"])
1962
2903
    del server_config
1963
 
    
 
2904
 
1964
2905
    # Override the settings from the config file with command line
1965
2906
    # options, if set.
1966
2907
    for option in ("interface", "address", "port", "debug",
1967
 
                   "priority", "servicename", "configdir",
1968
 
                   "use_dbus", "use_ipv6", "debuglevel", "restore"):
 
2908
                   "priority", "servicename", "configdir", "use_dbus",
 
2909
                   "use_ipv6", "debuglevel", "restore", "statedir",
 
2910
                   "socket", "foreground", "zeroconf"):
1969
2911
        value = getattr(options, option)
1970
2912
        if value is not None:
1971
2913
            server_settings[option] = value
1972
2914
    del options
1973
2915
    # Force all strings to be unicode
1974
2916
    for option in server_settings.keys():
1975
 
        if type(server_settings[option]) is str:
1976
 
            server_settings[option] = unicode(server_settings[option])
 
2917
        if isinstance(server_settings[option], bytes):
 
2918
            server_settings[option] = (server_settings[option]
 
2919
                                       .decode("utf-8"))
 
2920
    # Force all boolean options to be boolean
 
2921
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
2922
                   "foreground", "zeroconf"):
 
2923
        server_settings[option] = bool(server_settings[option])
 
2924
    # Debug implies foreground
 
2925
    if server_settings["debug"]:
 
2926
        server_settings["foreground"] = True
1977
2927
    # Now we have our good server settings in "server_settings"
1978
 
    
 
2928
 
1979
2929
    ##################################################################
1980
 
    
 
2930
 
 
2931
    if (not server_settings["zeroconf"]
 
2932
        and not (server_settings["port"]
 
2933
                 or server_settings["socket"] != "")):
 
2934
        parser.error("Needs port or socket to work without Zeroconf")
 
2935
 
1981
2936
    # For convenience
1982
2937
    debug = server_settings["debug"]
1983
2938
    debuglevel = server_settings["debuglevel"]
1984
2939
    use_dbus = server_settings["use_dbus"]
1985
2940
    use_ipv6 = server_settings["use_ipv6"]
1986
 
    
 
2941
    stored_state_path = os.path.join(server_settings["statedir"],
 
2942
                                     stored_state_file)
 
2943
    foreground = server_settings["foreground"]
 
2944
    zeroconf = server_settings["zeroconf"]
 
2945
 
 
2946
    if debug:
 
2947
        initlogger(debug, logging.DEBUG)
 
2948
    else:
 
2949
        if not debuglevel:
 
2950
            initlogger(debug)
 
2951
        else:
 
2952
            level = getattr(logging, debuglevel.upper())
 
2953
            initlogger(debug, level)
 
2954
 
1987
2955
    if server_settings["servicename"] != "Mandos":
1988
 
        syslogger.setFormatter(logging.Formatter
1989
 
                               ('Mandos (%s) [%%(process)d]:'
1990
 
                                ' %%(levelname)s: %%(message)s'
1991
 
                                % server_settings["servicename"]))
1992
 
    
 
2956
        syslogger.setFormatter(
 
2957
            logging.Formatter('Mandos ({}) [%(process)d]:'
 
2958
                              ' %(levelname)s: %(message)s'.format(
 
2959
                                  server_settings["servicename"])))
 
2960
 
1993
2961
    # Parse config file with clients
1994
 
    client_defaults = { "timeout": "5m",
1995
 
                        "extended_timeout": "15m",
1996
 
                        "interval": "2m",
1997
 
                        "checker": "fping -q -- %%(host)s",
1998
 
                        "host": "",
1999
 
                        "approval_delay": "0s",
2000
 
                        "approval_duration": "1s",
2001
 
                        }
2002
 
    client_config = configparser.SafeConfigParser(client_defaults)
 
2962
    client_config = configparser.SafeConfigParser(Client
 
2963
                                                  .client_defaults)
2003
2964
    client_config.read(os.path.join(server_settings["configdir"],
2004
2965
                                    "clients.conf"))
2005
 
    
 
2966
 
2006
2967
    global mandos_dbus_service
2007
2968
    mandos_dbus_service = None
2008
 
    
2009
 
    tcp_server = MandosServer((server_settings["address"],
2010
 
                               server_settings["port"]),
2011
 
                              ClientHandler,
2012
 
                              interface=(server_settings["interface"]
2013
 
                                         or None),
2014
 
                              use_ipv6=use_ipv6,
2015
 
                              gnutls_priority=
2016
 
                              server_settings["priority"],
2017
 
                              use_dbus=use_dbus)
2018
 
    if not debug:
2019
 
        pidfilename = "/var/run/mandos.pid"
2020
 
        try:
2021
 
            pidfile = open(pidfilename, "w")
2022
 
        except IOError:
2023
 
            logger.error("Could not open file %r", pidfilename)
2024
 
    
2025
 
    try:
2026
 
        uid = pwd.getpwnam("_mandos").pw_uid
2027
 
        gid = pwd.getpwnam("_mandos").pw_gid
2028
 
    except KeyError:
2029
 
        try:
2030
 
            uid = pwd.getpwnam("mandos").pw_uid
2031
 
            gid = pwd.getpwnam("mandos").pw_gid
 
2969
 
 
2970
    socketfd = None
 
2971
    if server_settings["socket"] != "":
 
2972
        socketfd = server_settings["socket"]
 
2973
    tcp_server = MandosServer(
 
2974
        (server_settings["address"], server_settings["port"]),
 
2975
        ClientHandler,
 
2976
        interface=(server_settings["interface"] or None),
 
2977
        use_ipv6=use_ipv6,
 
2978
        gnutls_priority=server_settings["priority"],
 
2979
        use_dbus=use_dbus,
 
2980
        socketfd=socketfd)
 
2981
    if not foreground:
 
2982
        pidfilename = "/run/mandos.pid"
 
2983
        if not os.path.isdir("/run/."):
 
2984
            pidfilename = "/var/run/mandos.pid"
 
2985
        pidfile = None
 
2986
        try:
 
2987
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
 
2988
        except IOError as e:
 
2989
            logger.error("Could not open file %r", pidfilename,
 
2990
                         exc_info=e)
 
2991
 
 
2992
    for name, group in (("_mandos", "_mandos"),
 
2993
                        ("mandos", "mandos"),
 
2994
                        ("nobody", "nogroup")):
 
2995
        try:
 
2996
            uid = pwd.getpwnam(name).pw_uid
 
2997
            gid = pwd.getpwnam(group).pw_gid
 
2998
            break
2032
2999
        except KeyError:
2033
 
            try:
2034
 
                uid = pwd.getpwnam("nobody").pw_uid
2035
 
                gid = pwd.getpwnam("nobody").pw_gid
2036
 
            except KeyError:
2037
 
                uid = 65534
2038
 
                gid = 65534
 
3000
            continue
 
3001
    else:
 
3002
        uid = 65534
 
3003
        gid = 65534
2039
3004
    try:
2040
3005
        os.setgid(gid)
2041
3006
        os.setuid(uid)
 
3007
        if debug:
 
3008
            logger.debug("Did setuid/setgid to {}:{}".format(uid,
 
3009
                                                             gid))
2042
3010
    except OSError as error:
2043
 
        if error[0] != errno.EPERM:
2044
 
            raise error
2045
 
    
2046
 
    if not debug and not debuglevel:
2047
 
        logger.setLevel(logging.WARNING)
2048
 
    if debuglevel:
2049
 
        level = getattr(logging, debuglevel.upper())
2050
 
        logger.setLevel(level)
2051
 
    
 
3011
        logger.warning("Failed to setuid/setgid to {}:{}: {}"
 
3012
                       .format(uid, gid, os.strerror(error.errno)))
 
3013
        if error.errno != errno.EPERM:
 
3014
            raise
 
3015
 
2052
3016
    if debug:
2053
 
        logger.setLevel(logging.DEBUG)
2054
3017
        # Enable all possible GnuTLS debugging
2055
 
        
 
3018
 
2056
3019
        # "Use a log level over 10 to enable all debugging options."
2057
3020
        # - GnuTLS manual
2058
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
2059
 
        
2060
 
        @gnutls.library.types.gnutls_log_func
 
3021
        gnutls.global_set_log_level(11)
 
3022
 
 
3023
        @gnutls.log_func
2061
3024
        def debug_gnutls(level, string):
2062
3025
            logger.debug("GnuTLS: %s", string[:-1])
2063
 
        
2064
 
        (gnutls.library.functions
2065
 
         .gnutls_global_set_log_function(debug_gnutls))
2066
 
        
 
3026
 
 
3027
        gnutls.global_set_log_function(debug_gnutls)
 
3028
 
2067
3029
        # Redirect stdin so all checkers get /dev/null
2068
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
3030
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
2069
3031
        os.dup2(null, sys.stdin.fileno())
2070
3032
        if null > 2:
2071
3033
            os.close(null)
2072
 
    else:
2073
 
        # No console logging
2074
 
        logger.removeHandler(console)
2075
 
    
 
3034
 
2076
3035
    # Need to fork before connecting to D-Bus
2077
 
    if not debug:
 
3036
    if not foreground:
2078
3037
        # Close all input and output, do double fork, etc.
2079
3038
        daemon()
2080
 
    
 
3039
 
 
3040
    # multiprocessing will use threads, so before we use GLib we need
 
3041
    # to inform GLib that threads will be used.
 
3042
    GLib.threads_init()
 
3043
 
2081
3044
    global main_loop
2082
3045
    # From the Avahi example code
2083
 
    DBusGMainLoop(set_as_default=True )
2084
 
    main_loop = gobject.MainLoop()
 
3046
    DBusGMainLoop(set_as_default=True)
 
3047
    main_loop = GLib.MainLoop()
2085
3048
    bus = dbus.SystemBus()
2086
3049
    # End of Avahi example code
2087
3050
    if use_dbus:
2088
3051
        try:
2089
3052
            bus_name = dbus.service.BusName("se.recompile.Mandos",
2090
 
                                            bus, do_not_queue=True)
2091
 
            old_bus_name = (dbus.service.BusName
2092
 
                            ("se.bsnet.fukt.Mandos", bus,
2093
 
                             do_not_queue=True))
2094
 
        except dbus.exceptions.NameExistsException as e:
2095
 
            logger.error(unicode(e) + ", disabling D-Bus")
 
3053
                                            bus,
 
3054
                                            do_not_queue=True)
 
3055
            old_bus_name = dbus.service.BusName(
 
3056
                "se.bsnet.fukt.Mandos", bus,
 
3057
                do_not_queue=True)
 
3058
        except dbus.exceptions.DBusException as e:
 
3059
            logger.error("Disabling D-Bus:", exc_info=e)
2096
3060
            use_dbus = False
2097
3061
            server_settings["use_dbus"] = False
2098
3062
            tcp_server.use_dbus = False
2099
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
2100
 
    service = AvahiServiceToSyslog(name =
2101
 
                                   server_settings["servicename"],
2102
 
                                   servicetype = "_mandos._tcp",
2103
 
                                   protocol = protocol, bus = bus)
2104
 
    if server_settings["interface"]:
2105
 
        service.interface = (if_nametoindex
2106
 
                             (str(server_settings["interface"])))
2107
 
    
 
3063
    if zeroconf:
 
3064
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
3065
        service = AvahiServiceToSyslog(
 
3066
            name=server_settings["servicename"],
 
3067
            servicetype="_mandos._tcp",
 
3068
            protocol=protocol,
 
3069
            bus=bus)
 
3070
        if server_settings["interface"]:
 
3071
            service.interface = if_nametoindex(
 
3072
                server_settings["interface"].encode("utf-8"))
 
3073
 
2108
3074
    global multiprocessing_manager
2109
3075
    multiprocessing_manager = multiprocessing.Manager()
2110
 
    
 
3076
 
2111
3077
    client_class = Client
2112
3078
    if use_dbus:
2113
 
        client_class = functools.partial(ClientDBusTransitional,
2114
 
                                         bus = bus)
2115
 
    
2116
 
    special_settings = {
2117
 
        # Some settings need to be accessd by special methods;
2118
 
        # booleans need .getboolean(), etc.  Here is a list of them:
2119
 
        "approved_by_default":
2120
 
            lambda section:
2121
 
            client_config.getboolean(section, "approved_by_default"),
2122
 
        }
2123
 
    # Construct a new dict of client settings of this form:
2124
 
    # { client_name: {setting_name: value, ...}, ...}
2125
 
    # with exceptions for any special settings as defined above
2126
 
    client_settings = dict((clientname,
2127
 
                           dict((setting,
2128
 
                                 (value if setting not in special_settings
2129
 
                                  else special_settings[setting](clientname)))
2130
 
                                for setting, value in client_config.items(clientname)))
2131
 
                          for clientname in client_config.sections())
2132
 
    
 
3079
        client_class = functools.partial(ClientDBus, bus=bus)
 
3080
 
 
3081
    client_settings = Client.config_parser(client_config)
2133
3082
    old_client_settings = {}
2134
 
    clients_data = []
2135
 
 
2136
 
    # Get client data and settings from last running state. 
 
3083
    clients_data = {}
 
3084
 
 
3085
    # This is used to redirect stdout and stderr for checker processes
 
3086
    global wnull
 
3087
    wnull = open(os.devnull, "w")  # A writable /dev/null
 
3088
    # Only used if server is running in foreground but not in debug
 
3089
    # mode
 
3090
    if debug or not foreground:
 
3091
        wnull.close()
 
3092
 
 
3093
    # Get client data and settings from last running state.
2137
3094
    if server_settings["restore"]:
2138
3095
        try:
2139
3096
            with open(stored_state_path, "rb") as stored_state:
2140
 
                clients_data, old_client_settings = pickle.load(stored_state)
 
3097
                if sys.version_info.major == 2:
 
3098
                    clients_data, old_client_settings = pickle.load(
 
3099
                        stored_state)
 
3100
                else:
 
3101
                    bytes_clients_data, bytes_old_client_settings = (
 
3102
                        pickle.load(stored_state, encoding="bytes"))
 
3103
                    #   Fix bytes to strings
 
3104
                    #  clients_data
 
3105
                    # .keys()
 
3106
                    clients_data = {(key.decode("utf-8")
 
3107
                                     if isinstance(key, bytes)
 
3108
                                     else key): value
 
3109
                                    for key, value in
 
3110
                                    bytes_clients_data.items()}
 
3111
                    del bytes_clients_data
 
3112
                    for key in clients_data:
 
3113
                        value = {(k.decode("utf-8")
 
3114
                                  if isinstance(k, bytes) else k): v
 
3115
                                 for k, v in
 
3116
                                 clients_data[key].items()}
 
3117
                        clients_data[key] = value
 
3118
                        # .client_structure
 
3119
                        value["client_structure"] = [
 
3120
                            (s.decode("utf-8")
 
3121
                             if isinstance(s, bytes)
 
3122
                             else s) for s in
 
3123
                            value["client_structure"]]
 
3124
                        # .name & .host
 
3125
                        for k in ("name", "host"):
 
3126
                            if isinstance(value[k], bytes):
 
3127
                                value[k] = value[k].decode("utf-8")
 
3128
                    #  old_client_settings
 
3129
                    # .keys()
 
3130
                    old_client_settings = {
 
3131
                        (key.decode("utf-8")
 
3132
                         if isinstance(key, bytes)
 
3133
                         else key): value
 
3134
                        for key, value in
 
3135
                        bytes_old_client_settings.items()}
 
3136
                    del bytes_old_client_settings
 
3137
                    # .host
 
3138
                    for value in old_client_settings.values():
 
3139
                        if isinstance(value["host"], bytes):
 
3140
                            value["host"] = (value["host"]
 
3141
                                             .decode("utf-8"))
2141
3142
            os.remove(stored_state_path)
2142
3143
        except IOError as e:
2143
 
            logger.warning("Could not load persistant state: {0}".format(e))
2144
 
            if e.errno != errno.ENOENT:
 
3144
            if e.errno == errno.ENOENT:
 
3145
                logger.warning("Could not load persistent state:"
 
3146
                               " {}".format(os.strerror(e.errno)))
 
3147
            else:
 
3148
                logger.critical("Could not load persistent state:",
 
3149
                                exc_info=e)
2145
3150
                raise
2146
 
 
2147
 
    for client in clients_data:
2148
 
        client_name = client["name"]
2149
 
        
2150
 
        # Decide which value to use after restoring saved state.
2151
 
        # We have three different values: Old config file,
2152
 
        # new config file, and saved state.
2153
 
        # New config value takes precedence if it differs from old
2154
 
        # config value, otherwise use saved state.
2155
 
        for name, value in client_settings[client_name].items():
 
3151
        except EOFError as e:
 
3152
            logger.warning("Could not load persistent state: "
 
3153
                           "EOFError:",
 
3154
                           exc_info=e)
 
3155
 
 
3156
    with PGPEngine() as pgp:
 
3157
        for client_name, client in clients_data.items():
 
3158
            # Skip removed clients
 
3159
            if client_name not in client_settings:
 
3160
                continue
 
3161
 
 
3162
            # Decide which value to use after restoring saved state.
 
3163
            # We have three different values: Old config file,
 
3164
            # new config file, and saved state.
 
3165
            # New config value takes precedence if it differs from old
 
3166
            # config value, otherwise use saved state.
 
3167
            for name, value in client_settings[client_name].items():
 
3168
                try:
 
3169
                    # For each value in new config, check if it
 
3170
                    # differs from the old config value (Except for
 
3171
                    # the "secret" attribute)
 
3172
                    if (name != "secret"
 
3173
                        and (value !=
 
3174
                             old_client_settings[client_name][name])):
 
3175
                        client[name] = value
 
3176
                except KeyError:
 
3177
                    pass
 
3178
 
 
3179
            # Clients who has passed its expire date can still be
 
3180
            # enabled if its last checker was successful.  A Client
 
3181
            # whose checker succeeded before we stored its state is
 
3182
            # assumed to have successfully run all checkers during
 
3183
            # downtime.
 
3184
            if client["enabled"]:
 
3185
                if datetime.datetime.utcnow() >= client["expires"]:
 
3186
                    if not client["last_checked_ok"]:
 
3187
                        logger.warning(
 
3188
                            "disabling client {} - Client never "
 
3189
                            "performed a successful checker".format(
 
3190
                                client_name))
 
3191
                        client["enabled"] = False
 
3192
                    elif client["last_checker_status"] != 0:
 
3193
                        logger.warning(
 
3194
                            "disabling client {} - Client last"
 
3195
                            " checker failed with error code"
 
3196
                            " {}".format(
 
3197
                                client_name,
 
3198
                                client["last_checker_status"]))
 
3199
                        client["enabled"] = False
 
3200
                    else:
 
3201
                        client["expires"] = (
 
3202
                            datetime.datetime.utcnow()
 
3203
                            + client["timeout"])
 
3204
                        logger.debug("Last checker succeeded,"
 
3205
                                     " keeping {} enabled".format(
 
3206
                                         client_name))
2156
3207
            try:
2157
 
                # For each value in new config, check if it differs
2158
 
                # from the old config value (Except for the "secret"
2159
 
                # attribute)
2160
 
                if name != "secret" and value != old_client_settings[client_name][name]:
2161
 
                    setattr(client, name, value)
2162
 
            except KeyError:
2163
 
                pass
2164
 
 
2165
 
        # Clients who has passed its expire date, can still be enabled if its
2166
 
        # last checker was sucessful. Clients who checkers failed before we
2167
 
        # stored it state is asumed to had failed checker during downtime.
2168
 
        if client["enabled"] and client["last_checked_ok"]:
2169
 
            if ((datetime.datetime.utcnow() - client["last_checked_ok"])
2170
 
                > client["interval"]):
2171
 
                if client["last_checker_status"] != 0:
2172
 
                    client["enabled"] = False
2173
 
                else:
2174
 
                    client["expires"] = datetime.datetime.utcnow() + client["timeout"]
2175
 
 
2176
 
        client["changedstate"] = (multiprocessing_manager
2177
 
                                  .Condition(multiprocessing_manager
2178
 
                                             .Lock()))
2179
 
        if use_dbus:
2180
 
            new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)
2181
 
            tcp_server.clients[client_name] = new_client
2182
 
            new_client.bus = bus
2183
 
            for name, value in client.iteritems():
2184
 
                setattr(new_client, name, value)
2185
 
            client_object_name = unicode(client_name).translate(
2186
 
                {ord("."): ord("_"),
2187
 
                 ord("-"): ord("_")})
2188
 
            new_client.dbus_object_path = (dbus.ObjectPath
2189
 
                                     ("/clients/" + client_object_name))
2190
 
            DBusObjectWithProperties.__init__(new_client,
2191
 
                                              new_client.bus,
2192
 
                                              new_client.dbus_object_path)
2193
 
        else:
2194
 
            tcp_server.clients[client_name] = Client.__new__(Client)
2195
 
            for name, value in client.iteritems():
2196
 
                setattr(tcp_server.clients[client_name], name, value)
2197
 
                
2198
 
        tcp_server.clients[client_name].decrypt_secret(
2199
 
            client_settings[client_name]["secret"])            
2200
 
        
2201
 
    # Create/remove clients based on new changes made to config
2202
 
    for clientname in set(old_client_settings) - set(client_settings):
2203
 
        del tcp_server.clients[clientname]
2204
 
    for clientname in set(client_settings) - set(old_client_settings):
2205
 
        tcp_server.clients[clientname] = (client_class(name = clientname,
2206
 
                                                       config =
2207
 
                                                       client_settings
2208
 
                                                       [clientname]))
2209
 
    
 
3208
                client["secret"] = pgp.decrypt(
 
3209
                    client["encrypted_secret"],
 
3210
                    client_settings[client_name]["secret"])
 
3211
            except PGPError:
 
3212
                # If decryption fails, we use secret from new settings
 
3213
                logger.debug("Failed to decrypt {} old secret".format(
 
3214
                    client_name))
 
3215
                client["secret"] = (client_settings[client_name]
 
3216
                                    ["secret"])
 
3217
 
 
3218
    # Add/remove clients based on new changes made to config
 
3219
    for client_name in (set(old_client_settings)
 
3220
                        - set(client_settings)):
 
3221
        del clients_data[client_name]
 
3222
    for client_name in (set(client_settings)
 
3223
                        - set(old_client_settings)):
 
3224
        clients_data[client_name] = client_settings[client_name]
 
3225
 
 
3226
    # Create all client objects
 
3227
    for client_name, client in clients_data.items():
 
3228
        tcp_server.clients[client_name] = client_class(
 
3229
            name=client_name,
 
3230
            settings=client,
 
3231
            server_settings=server_settings)
2210
3232
 
2211
3233
    if not tcp_server.clients:
2212
3234
        logger.warning("No clients defined")
2213
 
        
2214
 
    if not debug:
2215
 
        try:
2216
 
            with pidfile:
2217
 
                pid = os.getpid()
2218
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
2219
 
            del pidfile
2220
 
        except IOError:
2221
 
            logger.error("Could not write to file %r with PID %d",
2222
 
                         pidfilename, pid)
2223
 
        except NameError:
2224
 
            # "pidfile" was never created
2225
 
            pass
 
3235
 
 
3236
    if not foreground:
 
3237
        if pidfile is not None:
 
3238
            pid = os.getpid()
 
3239
            try:
 
3240
                with pidfile:
 
3241
                    print(pid, file=pidfile)
 
3242
            except IOError:
 
3243
                logger.error("Could not write to file %r with PID %d",
 
3244
                             pidfilename, pid)
 
3245
        del pidfile
2226
3246
        del pidfilename
2227
 
        
2228
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
2229
 
    
2230
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
2231
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
2232
 
    
 
3247
 
 
3248
    for termsig in (signal.SIGHUP, signal.SIGTERM):
 
3249
        GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
 
3250
                             lambda: main_loop.quit() and False)
 
3251
 
2233
3252
    if use_dbus:
2234
 
        class MandosDBusService(dbus.service.Object):
 
3253
 
 
3254
        @alternate_dbus_interfaces(
 
3255
            {"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
 
3256
        class MandosDBusService(DBusObjectWithObjectManager):
2235
3257
            """A D-Bus proxy object"""
 
3258
 
2236
3259
            def __init__(self):
2237
3260
                dbus.service.Object.__init__(self, bus, "/")
 
3261
 
2238
3262
            _interface = "se.recompile.Mandos"
2239
 
            
 
3263
 
2240
3264
            @dbus.service.signal(_interface, signature="o")
2241
3265
            def ClientAdded(self, objpath):
2242
3266
                "D-Bus signal"
2243
3267
                pass
2244
 
            
 
3268
 
2245
3269
            @dbus.service.signal(_interface, signature="ss")
2246
3270
            def ClientNotFound(self, fingerprint, address):
2247
3271
                "D-Bus signal"
2248
3272
                pass
2249
 
            
 
3273
 
 
3274
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3275
                               "true"})
2250
3276
            @dbus.service.signal(_interface, signature="os")
2251
3277
            def ClientRemoved(self, objpath, name):
2252
3278
                "D-Bus signal"
2253
3279
                pass
2254
 
            
 
3280
 
 
3281
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3282
                               "true"})
2255
3283
            @dbus.service.method(_interface, out_signature="ao")
2256
3284
            def GetAllClients(self):
2257
3285
                "D-Bus method"
2258
 
                return dbus.Array(c.dbus_object_path
2259
 
                                  for c in
2260
 
                                  tcp_server.clients.itervalues())
2261
 
            
 
3286
                return dbus.Array(c.dbus_object_path for c in
 
3287
                                  tcp_server.clients.values())
 
3288
 
 
3289
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3290
                               "true"})
2262
3291
            @dbus.service.method(_interface,
2263
3292
                                 out_signature="a{oa{sv}}")
2264
3293
            def GetAllClientsWithProperties(self):
2265
3294
                "D-Bus method"
2266
3295
                return dbus.Dictionary(
2267
 
                    ((c.dbus_object_path, c.GetAll(""))
2268
 
                     for c in tcp_server.clients.itervalues()),
 
3296
                    {c.dbus_object_path: c.GetAll(
 
3297
                        "se.recompile.Mandos.Client")
 
3298
                     for c in tcp_server.clients.values()},
2269
3299
                    signature="oa{sv}")
2270
 
            
 
3300
 
2271
3301
            @dbus.service.method(_interface, in_signature="o")
2272
3302
            def RemoveClient(self, object_path):
2273
3303
                "D-Bus method"
2274
 
                for c in tcp_server.clients.itervalues():
 
3304
                for c in tcp_server.clients.values():
2275
3305
                    if c.dbus_object_path == object_path:
2276
3306
                        del tcp_server.clients[c.name]
2277
3307
                        c.remove_from_connection()
2278
 
                        # Don't signal anything except ClientRemoved
 
3308
                        # Don't signal the disabling
2279
3309
                        c.disable(quiet=True)
2280
 
                        # Emit D-Bus signal
2281
 
                        self.ClientRemoved(object_path, c.name)
 
3310
                        # Emit D-Bus signal for removal
 
3311
                        self.client_removed_signal(c)
2282
3312
                        return
2283
3313
                raise KeyError(object_path)
2284
 
            
 
3314
 
2285
3315
            del _interface
2286
 
        
2287
 
        class MandosDBusServiceTransitional(MandosDBusService):
2288
 
            __metaclass__ = AlternateDBusNamesMetaclass
2289
 
        mandos_dbus_service = MandosDBusServiceTransitional()
2290
 
    
 
3316
 
 
3317
            @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
3318
                                 out_signature="a{oa{sa{sv}}}")
 
3319
            def GetManagedObjects(self):
 
3320
                """D-Bus method"""
 
3321
                return dbus.Dictionary(
 
3322
                    {client.dbus_object_path:
 
3323
                     dbus.Dictionary(
 
3324
                         {interface: client.GetAll(interface)
 
3325
                          for interface in
 
3326
                          client._get_all_interface_names()})
 
3327
                     for client in tcp_server.clients.values()})
 
3328
 
 
3329
            def client_added_signal(self, client):
 
3330
                """Send the new standard signal and the old signal"""
 
3331
                if use_dbus:
 
3332
                    # New standard signal
 
3333
                    self.InterfacesAdded(
 
3334
                        client.dbus_object_path,
 
3335
                        dbus.Dictionary(
 
3336
                            {interface: client.GetAll(interface)
 
3337
                             for interface in
 
3338
                             client._get_all_interface_names()}))
 
3339
                    # Old signal
 
3340
                    self.ClientAdded(client.dbus_object_path)
 
3341
 
 
3342
            def client_removed_signal(self, client):
 
3343
                """Send the new standard signal and the old signal"""
 
3344
                if use_dbus:
 
3345
                    # New standard signal
 
3346
                    self.InterfacesRemoved(
 
3347
                        client.dbus_object_path,
 
3348
                        client._get_all_interface_names())
 
3349
                    # Old signal
 
3350
                    self.ClientRemoved(client.dbus_object_path,
 
3351
                                       client.name)
 
3352
 
 
3353
        mandos_dbus_service = MandosDBusService()
 
3354
 
 
3355
    # Save modules to variables to exempt the modules from being
 
3356
    # unloaded before the function registered with atexit() is run.
 
3357
    mp = multiprocessing
 
3358
    wn = wnull
 
3359
 
2291
3360
    def cleanup():
2292
3361
        "Cleanup function; run on exit"
2293
 
        service.cleanup()
2294
 
        
2295
 
        multiprocessing.active_children()
 
3362
        if zeroconf:
 
3363
            service.cleanup()
 
3364
 
 
3365
        mp.active_children()
 
3366
        wn.close()
2296
3367
        if not (tcp_server.clients or client_settings):
2297
3368
            return
2298
3369
 
2299
 
        # Store client before exiting. Secrets are encrypted with key based
2300
 
        # on what config file has. If config file is removed/edited, old
2301
 
        # secret will thus be unrecovable.
2302
 
        clients = []
2303
 
        for client in tcp_server.clients.itervalues():
2304
 
            client.encrypt_secret(client_settings[client.name]["secret"])
2305
 
 
2306
 
            client_dict = {}
2307
 
 
2308
 
            # A list of attributes that will not be stored when shuting down.
2309
 
            exclude = set(("bus", "changedstate", "secret"))            
2310
 
            for name, typ in inspect.getmembers(dbus.service.Object):
2311
 
                exclude.add(name)
2312
 
                
2313
 
            client_dict["encrypted_secret"] = client.encrypted_secret
2314
 
            for attr in client.client_structure:
2315
 
                if attr not in exclude:
2316
 
                    client_dict[attr] = getattr(client, attr)
2317
 
 
2318
 
            clients.append(client_dict) 
2319
 
            del client_settings[client.name]["secret"]
2320
 
            
 
3370
        # Store client before exiting. Secrets are encrypted with key
 
3371
        # based on what config file has. If config file is
 
3372
        # removed/edited, old secret will thus be unrecovable.
 
3373
        clients = {}
 
3374
        with PGPEngine() as pgp:
 
3375
            for client in tcp_server.clients.values():
 
3376
                key = client_settings[client.name]["secret"]
 
3377
                client.encrypted_secret = pgp.encrypt(client.secret,
 
3378
                                                      key)
 
3379
                client_dict = {}
 
3380
 
 
3381
                # A list of attributes that can not be pickled
 
3382
                # + secret.
 
3383
                exclude = {"bus", "changedstate", "secret",
 
3384
                           "checker", "server_settings"}
 
3385
                for name, typ in inspect.getmembers(dbus.service
 
3386
                                                    .Object):
 
3387
                    exclude.add(name)
 
3388
 
 
3389
                client_dict["encrypted_secret"] = (client
 
3390
                                                   .encrypted_secret)
 
3391
                for attr in client.client_structure:
 
3392
                    if attr not in exclude:
 
3393
                        client_dict[attr] = getattr(client, attr)
 
3394
 
 
3395
                clients[client.name] = client_dict
 
3396
                del client_settings[client.name]["secret"]
 
3397
 
2321
3398
        try:
2322
 
            with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:
2323
 
                pickle.dump((clients, client_settings), stored_state)
2324
 
        except IOError as e:
2325
 
            logger.warning("Could not save persistant state: {0}".format(e))
2326
 
            if e.errno != errno.ENOENT:
 
3399
            with tempfile.NamedTemporaryFile(
 
3400
                    mode='wb',
 
3401
                    suffix=".pickle",
 
3402
                    prefix='clients-',
 
3403
                    dir=os.path.dirname(stored_state_path),
 
3404
                    delete=False) as stored_state:
 
3405
                pickle.dump((clients, client_settings), stored_state,
 
3406
                            protocol=2)
 
3407
                tempname = stored_state.name
 
3408
            os.rename(tempname, stored_state_path)
 
3409
        except (IOError, OSError) as e:
 
3410
            if not debug:
 
3411
                try:
 
3412
                    os.remove(tempname)
 
3413
                except NameError:
 
3414
                    pass
 
3415
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
 
3416
                logger.warning("Could not save persistent state: {}"
 
3417
                               .format(os.strerror(e.errno)))
 
3418
            else:
 
3419
                logger.warning("Could not save persistent state:",
 
3420
                               exc_info=e)
2327
3421
                raise
2328
3422
 
2329
3423
        # Delete all clients, and settings from config
2331
3425
            name, client = tcp_server.clients.popitem()
2332
3426
            if use_dbus:
2333
3427
                client.remove_from_connection()
2334
 
            # Don't signal anything except ClientRemoved
 
3428
            # Don't signal the disabling
2335
3429
            client.disable(quiet=True)
 
3430
            # Emit D-Bus signal for removal
2336
3431
            if use_dbus:
2337
 
                # Emit D-Bus signal
2338
 
                mandos_dbus_service.ClientRemoved(client
2339
 
                                                  .dbus_object_path,
2340
 
                                                  client.name)
 
3432
                mandos_dbus_service.client_removed_signal(client)
2341
3433
        client_settings.clear()
2342
 
    
 
3434
 
2343
3435
    atexit.register(cleanup)
2344
 
    
2345
 
    for client in tcp_server.clients.itervalues():
 
3436
 
 
3437
    for client in tcp_server.clients.values():
2346
3438
        if use_dbus:
2347
 
            # Emit D-Bus signal
2348
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
 
3439
            # Emit D-Bus signal for adding
 
3440
            mandos_dbus_service.client_added_signal(client)
2349
3441
        # Need to initiate checking of clients
2350
3442
        if client.enabled:
2351
3443
            client.init_checker()
2352
3444
 
2353
 
    
2354
3445
    tcp_server.enable()
2355
3446
    tcp_server.server_activate()
2356
 
    
 
3447
 
2357
3448
    # Find out what port we got
2358
 
    service.port = tcp_server.socket.getsockname()[1]
 
3449
    if zeroconf:
 
3450
        service.port = tcp_server.socket.getsockname()[1]
2359
3451
    if use_ipv6:
2360
3452
        logger.info("Now listening on address %r, port %d,"
2361
 
                    " flowinfo %d, scope_id %d"
2362
 
                    % tcp_server.socket.getsockname())
 
3453
                    " flowinfo %d, scope_id %d",
 
3454
                    *tcp_server.socket.getsockname())
2363
3455
    else:                       # IPv4
2364
 
        logger.info("Now listening on address %r, port %d"
2365
 
                    % tcp_server.socket.getsockname())
2366
 
    
2367
 
    #service.interface = tcp_server.socket.getsockname()[3]
2368
 
    
 
3456
        logger.info("Now listening on address %r, port %d",
 
3457
                    *tcp_server.socket.getsockname())
 
3458
 
 
3459
    # service.interface = tcp_server.socket.getsockname()[3]
 
3460
 
2369
3461
    try:
2370
 
        # From the Avahi example code
2371
 
        try:
2372
 
            service.activate()
2373
 
        except dbus.exceptions.DBusException as error:
2374
 
            logger.critical("DBusException: %s", error)
2375
 
            cleanup()
2376
 
            sys.exit(1)
2377
 
        # End of Avahi example code
2378
 
        
2379
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2380
 
                             lambda *args, **kwargs:
2381
 
                             (tcp_server.handle_request
2382
 
                              (*args[2:], **kwargs) or True))
2383
 
        
 
3462
        if zeroconf:
 
3463
            # From the Avahi example code
 
3464
            try:
 
3465
                service.activate()
 
3466
            except dbus.exceptions.DBusException as error:
 
3467
                logger.critical("D-Bus Exception", exc_info=error)
 
3468
                cleanup()
 
3469
                sys.exit(1)
 
3470
            # End of Avahi example code
 
3471
 
 
3472
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
 
3473
                          lambda *args, **kwargs:
 
3474
                          (tcp_server.handle_request
 
3475
                           (*args[2:], **kwargs) or True))
 
3476
 
2384
3477
        logger.debug("Starting main loop")
2385
3478
        main_loop.run()
2386
3479
    except AvahiError as error:
2387
 
        logger.critical("AvahiError: %s", error)
 
3480
        logger.critical("Avahi Error", exc_info=error)
2388
3481
        cleanup()
2389
3482
        sys.exit(1)
2390
3483
    except KeyboardInterrupt: