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  • Committer: Teddy Hogeborn
  • Date: 2018-02-06 20:03:50 UTC
  • Revision ID: teddy@recompile.se-20180206200350-jzvorueb731xkph3
Update Debian Debhelper compatibility version.

* (debian/compat): Change to "10".

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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 © 2008-2017 Teddy Hogeborn
 
15
# Copyright © 2008-2017 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
 
# 
31
 
# Contact the authors at <mandos@fukt.bsnet.se>.
32
 
# 
 
30
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
 
31
#
 
32
# Contact the authors at <mandos@recompile.se>.
 
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
 
74
import types
 
75
import binascii
 
76
import tempfile
 
77
import itertools
 
78
import collections
 
79
import codecs
65
80
 
66
81
import dbus
67
82
import dbus.service
68
 
import gobject
69
 
import avahi
 
83
from gi.repository import GLib
70
84
from dbus.mainloop.glib import DBusGMainLoop
71
85
import ctypes
72
86
import ctypes.util
73
87
import xml.dom.minidom
74
88
import inspect
75
89
 
 
90
# Try to find the value of SO_BINDTODEVICE:
76
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:
77
94
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
78
95
except AttributeError:
79
96
    try:
 
97
        # This is where SO_BINDTODEVICE was up to and including Python
 
98
        # 2.6, and also 3.2:
80
99
        from IN import SO_BINDTODEVICE
81
100
    except ImportError:
82
 
        SO_BINDTODEVICE = None
83
 
 
84
 
 
85
 
version = "1.3.1"
86
 
 
87
 
#logger = logging.getLogger('mandos')
88
 
logger = logging.Logger('mandos')
89
 
syslogger = (logging.handlers.SysLogHandler
90
 
             (facility = logging.handlers.SysLogHandler.LOG_DAEMON,
91
 
              address = str("/dev/log")))
92
 
syslogger.setFormatter(logging.Formatter
93
 
                       ('Mandos [%(process)d]: %(levelname)s:'
94
 
                        ' %(message)s'))
95
 
logger.addHandler(syslogger)
96
 
 
97
 
console = logging.StreamHandler()
98
 
console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'
99
 
                                       ' %(levelname)s:'
100
 
                                       ' %(message)s'))
101
 
logger.addHandler(console)
 
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 = "1.7.16"
 
119
stored_state_file = "clients.pickle"
 
120
 
 
121
logger = logging.getLogger()
 
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()
 
302
 
102
303
 
103
304
class AvahiError(Exception):
104
305
    def __init__(self, value, *args, **kwargs):
105
306
        self.value = value
106
 
        super(AvahiError, self).__init__(value, *args, **kwargs)
107
 
    def __unicode__(self):
108
 
        return unicode(repr(self.value))
 
307
        return super(AvahiError, self).__init__(value, *args,
 
308
                                                **kwargs)
 
309
 
109
310
 
110
311
class AvahiServiceError(AvahiError):
111
312
    pass
112
313
 
 
314
 
113
315
class AvahiGroupError(AvahiError):
114
316
    pass
115
317
 
116
318
 
117
319
class AvahiService(object):
118
320
    """An Avahi (Zeroconf) service.
119
 
    
 
321
 
120
322
    Attributes:
121
323
    interface: integer; avahi.IF_UNSPEC or an interface index.
122
324
               Used to optionally bind to the specified interface.
123
325
    name: string; Example: 'Mandos'
124
326
    type: string; Example: '_mandos._tcp'.
125
 
                  See <http://www.dns-sd.org/ServiceTypes.html>
 
327
     See <https://www.iana.org/assignments/service-names-port-numbers>
126
328
    port: integer; what port to announce
127
329
    TXT: list of strings; TXT record for the service
128
330
    domain: string; Domain to publish on, default to .local if empty.
134
336
    server: D-Bus Server
135
337
    bus: dbus.SystemBus()
136
338
    """
137
 
    def __init__(self, interface = avahi.IF_UNSPEC, name = None,
138
 
                 servicetype = None, port = None, TXT = None,
139
 
                 domain = "", host = "", max_renames = 32768,
140
 
                 protocol = avahi.PROTO_UNSPEC, bus = None):
 
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):
141
351
        self.interface = interface
142
352
        self.name = name
143
353
        self.type = servicetype
152
362
        self.server = None
153
363
        self.bus = bus
154
364
        self.entry_group_state_changed_match = None
155
 
    def rename(self):
 
365
 
 
366
    def rename(self, remove=True):
156
367
        """Derived from the Avahi example code"""
157
368
        if self.rename_count >= self.max_renames:
158
369
            logger.critical("No suitable Zeroconf service name found"
159
370
                            " after %i retries, exiting.",
160
371
                            self.rename_count)
161
372
            raise AvahiServiceError("Too many renames")
162
 
        self.name = unicode(self.server.GetAlternativeServiceName(self.name))
 
373
        self.name = str(
 
374
            self.server.GetAlternativeServiceName(self.name))
 
375
        self.rename_count += 1
163
376
        logger.info("Changing Zeroconf service name to %r ...",
164
377
                    self.name)
165
 
        syslogger.setFormatter(logging.Formatter
166
 
                               ('Mandos (%s) [%%(process)d]:'
167
 
                                ' %%(levelname)s: %%(message)s'
168
 
                                % self.name))
169
 
        self.remove()
 
378
        if remove:
 
379
            self.remove()
170
380
        try:
171
381
            self.add()
172
382
        except dbus.exceptions.DBusException as error:
173
 
            logger.critical("DBusException: %s", error)
174
 
            self.cleanup()
175
 
            os._exit(1)
176
 
        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
 
177
392
    def remove(self):
178
393
        """Derived from the Avahi example code"""
179
394
        if self.entry_group_state_changed_match is not None:
181
396
            self.entry_group_state_changed_match = None
182
397
        if self.group is not None:
183
398
            self.group.Reset()
 
399
 
184
400
    def add(self):
185
401
        """Derived from the Avahi example code"""
186
402
        self.remove()
191
407
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
192
408
        self.entry_group_state_changed_match = (
193
409
            self.group.connect_to_signal(
194
 
                'StateChanged', self .entry_group_state_changed))
 
410
                'StateChanged', self.entry_group_state_changed))
195
411
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
196
412
                     self.name, self.type)
197
413
        self.group.AddService(
203
419
            dbus.UInt16(self.port),
204
420
            avahi.string_array_to_txt_array(self.TXT))
205
421
        self.group.Commit()
 
422
 
206
423
    def entry_group_state_changed(self, state, error):
207
424
        """Derived from the Avahi example code"""
208
425
        logger.debug("Avahi entry group state change: %i", state)
209
 
        
 
426
 
210
427
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
211
428
            logger.debug("Zeroconf service established.")
212
429
        elif state == avahi.ENTRY_GROUP_COLLISION:
214
431
            self.rename()
215
432
        elif state == avahi.ENTRY_GROUP_FAILURE:
216
433
            logger.critical("Avahi: Error in group state changed %s",
217
 
                            unicode(error))
218
 
            raise AvahiGroupError("State changed: %s"
219
 
                                  % unicode(error))
 
434
                            str(error))
 
435
            raise AvahiGroupError("State changed: {!s}".format(error))
 
436
 
220
437
    def cleanup(self):
221
438
        """Derived from the Avahi example code"""
222
439
        if self.group is not None:
223
440
            try:
224
441
                self.group.Free()
225
442
            except (dbus.exceptions.UnknownMethodException,
226
 
                    dbus.exceptions.DBusException) as e:
 
443
                    dbus.exceptions.DBusException):
227
444
                pass
228
445
            self.group = None
229
446
        self.remove()
 
447
 
230
448
    def server_state_changed(self, state, error=None):
231
449
        """Derived from the Avahi example code"""
232
450
        logger.debug("Avahi server state change: %i", state)
233
 
        bad_states = { avahi.SERVER_INVALID:
234
 
                           "Zeroconf server invalid",
235
 
                       avahi.SERVER_REGISTERING: None,
236
 
                       avahi.SERVER_COLLISION:
237
 
                           "Zeroconf server name collision",
238
 
                       avahi.SERVER_FAILURE:
239
 
                           "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
        }
240
457
        if state in bad_states:
241
458
            if bad_states[state] is not None:
242
459
                if error is None:
245
462
                    logger.error(bad_states[state] + ": %r", error)
246
463
            self.cleanup()
247
464
        elif state == avahi.SERVER_RUNNING:
248
 
            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)
249
477
        else:
250
478
            if error is None:
251
479
                logger.debug("Unknown state: %r", state)
252
480
            else:
253
481
                logger.debug("Unknown state: %r: %r", state, error)
 
482
 
254
483
    def activate(self):
255
484
        """Derived from the Avahi example code"""
256
485
        if self.server is None:
260
489
                                    follow_name_owner_changes=True),
261
490
                avahi.DBUS_INTERFACE_SERVER)
262
491
        self.server.connect_to_signal("StateChanged",
263
 
                                 self.server_state_changed)
 
492
                                      self.server_state_changed)
264
493
        self.server_state_changed(self.server.GetState())
265
494
 
266
495
 
 
496
class AvahiServiceToSyslog(AvahiService):
 
497
    def rename(self, *args, **kwargs):
 
498
        """Add the new name to the syslog messages"""
 
499
        ret = super(AvahiServiceToSyslog, self).rename(self, *args,
 
500
                                                       **kwargs)
 
501
        syslogger.setFormatter(logging.Formatter(
 
502
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
 
503
            .format(self.name)))
 
504
        return ret
 
505
 
 
506
 
 
507
# Pretend that we have a GnuTLS module
 
508
class GnuTLS(object):
 
509
    """This isn't so much a class as it is a module-like namespace.
 
510
    It is instantiated once, and simulates having a GnuTLS module."""
 
511
 
 
512
    library = ctypes.util.find_library("gnutls")
 
513
    if library is None:
 
514
        library = ctypes.util.find_library("gnutls-deb0")
 
515
    _library = ctypes.cdll.LoadLibrary(library)
 
516
    del library
 
517
    _need_version = b"3.3.0"
 
518
 
 
519
    def __init__(self):
 
520
        # Need to use "self" here, since this method is called before
 
521
        # the assignment to the "gnutls" global variable happens.
 
522
        if self.check_version(self._need_version) is None:
 
523
            raise self.Error("Needs GnuTLS {} or later"
 
524
                             .format(self._need_version))
 
525
 
 
526
    # Unless otherwise indicated, the constants and types below are
 
527
    # all from the gnutls/gnutls.h C header file.
 
528
 
 
529
    # Constants
 
530
    E_SUCCESS = 0
 
531
    E_INTERRUPTED = -52
 
532
    E_AGAIN = -28
 
533
    CRT_OPENPGP = 2
 
534
    CLIENT = 2
 
535
    SHUT_RDWR = 0
 
536
    CRD_CERTIFICATE = 1
 
537
    E_NO_CERTIFICATE_FOUND = -49
 
538
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
 
539
 
 
540
    # Types
 
541
    class session_int(ctypes.Structure):
 
542
        _fields_ = []
 
543
    session_t = ctypes.POINTER(session_int)
 
544
 
 
545
    class certificate_credentials_st(ctypes.Structure):
 
546
        _fields_ = []
 
547
    certificate_credentials_t = ctypes.POINTER(
 
548
        certificate_credentials_st)
 
549
    certificate_type_t = ctypes.c_int
 
550
 
 
551
    class datum_t(ctypes.Structure):
 
552
        _fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
 
553
                    ('size', ctypes.c_uint)]
 
554
 
 
555
    class openpgp_crt_int(ctypes.Structure):
 
556
        _fields_ = []
 
557
    openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
 
558
    openpgp_crt_fmt_t = ctypes.c_int  # gnutls/openpgp.h
 
559
    log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
 
560
    credentials_type_t = ctypes.c_int
 
561
    transport_ptr_t = ctypes.c_void_p
 
562
    close_request_t = ctypes.c_int
 
563
 
 
564
    # Exceptions
 
565
    class Error(Exception):
 
566
        # We need to use the class name "GnuTLS" here, since this
 
567
        # exception might be raised from within GnuTLS.__init__,
 
568
        # which is called before the assignment to the "gnutls"
 
569
        # global variable has happened.
 
570
        def __init__(self, message=None, code=None, args=()):
 
571
            # Default usage is by a message string, but if a return
 
572
            # code is passed, convert it to a string with
 
573
            # gnutls.strerror()
 
574
            self.code = code
 
575
            if message is None and code is not None:
 
576
                message = GnuTLS.strerror(code)
 
577
            return super(GnuTLS.Error, self).__init__(
 
578
                message, *args)
 
579
 
 
580
    class CertificateSecurityError(Error):
 
581
        pass
 
582
 
 
583
    # Classes
 
584
    class Credentials(object):
 
585
        def __init__(self):
 
586
            self._c_object = gnutls.certificate_credentials_t()
 
587
            gnutls.certificate_allocate_credentials(
 
588
                ctypes.byref(self._c_object))
 
589
            self.type = gnutls.CRD_CERTIFICATE
 
590
 
 
591
        def __del__(self):
 
592
            gnutls.certificate_free_credentials(self._c_object)
 
593
 
 
594
    class ClientSession(object):
 
595
        def __init__(self, socket, credentials=None):
 
596
            self._c_object = gnutls.session_t()
 
597
            gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
 
598
            gnutls.set_default_priority(self._c_object)
 
599
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
 
600
            gnutls.handshake_set_private_extensions(self._c_object,
 
601
                                                    True)
 
602
            self.socket = socket
 
603
            if credentials is None:
 
604
                credentials = gnutls.Credentials()
 
605
            gnutls.credentials_set(self._c_object, credentials.type,
 
606
                                   ctypes.cast(credentials._c_object,
 
607
                                               ctypes.c_void_p))
 
608
            self.credentials = credentials
 
609
 
 
610
        def __del__(self):
 
611
            gnutls.deinit(self._c_object)
 
612
 
 
613
        def handshake(self):
 
614
            return gnutls.handshake(self._c_object)
 
615
 
 
616
        def send(self, data):
 
617
            data = bytes(data)
 
618
            data_len = len(data)
 
619
            while data_len > 0:
 
620
                data_len -= gnutls.record_send(self._c_object,
 
621
                                               data[-data_len:],
 
622
                                               data_len)
 
623
 
 
624
        def bye(self):
 
625
            return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
 
626
 
 
627
    # Error handling functions
 
628
    def _error_code(result):
 
629
        """A function to raise exceptions on errors, suitable
 
630
        for the 'restype' attribute on ctypes functions"""
 
631
        if result >= 0:
 
632
            return result
 
633
        if result == gnutls.E_NO_CERTIFICATE_FOUND:
 
634
            raise gnutls.CertificateSecurityError(code=result)
 
635
        raise gnutls.Error(code=result)
 
636
 
 
637
    def _retry_on_error(result, func, arguments):
 
638
        """A function to retry on some errors, suitable
 
639
        for the 'errcheck' attribute on ctypes functions"""
 
640
        while result < 0:
 
641
            if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
 
642
                return _error_code(result)
 
643
            result = func(*arguments)
 
644
        return result
 
645
 
 
646
    # Unless otherwise indicated, the function declarations below are
 
647
    # all from the gnutls/gnutls.h C header file.
 
648
 
 
649
    # Functions
 
650
    priority_set_direct = _library.gnutls_priority_set_direct
 
651
    priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
 
652
                                    ctypes.POINTER(ctypes.c_char_p)]
 
653
    priority_set_direct.restype = _error_code
 
654
 
 
655
    init = _library.gnutls_init
 
656
    init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
 
657
    init.restype = _error_code
 
658
 
 
659
    set_default_priority = _library.gnutls_set_default_priority
 
660
    set_default_priority.argtypes = [session_t]
 
661
    set_default_priority.restype = _error_code
 
662
 
 
663
    record_send = _library.gnutls_record_send
 
664
    record_send.argtypes = [session_t, ctypes.c_void_p,
 
665
                            ctypes.c_size_t]
 
666
    record_send.restype = ctypes.c_ssize_t
 
667
    record_send.errcheck = _retry_on_error
 
668
 
 
669
    certificate_allocate_credentials = (
 
670
        _library.gnutls_certificate_allocate_credentials)
 
671
    certificate_allocate_credentials.argtypes = [
 
672
        ctypes.POINTER(certificate_credentials_t)]
 
673
    certificate_allocate_credentials.restype = _error_code
 
674
 
 
675
    certificate_free_credentials = (
 
676
        _library.gnutls_certificate_free_credentials)
 
677
    certificate_free_credentials.argtypes = [
 
678
        certificate_credentials_t]
 
679
    certificate_free_credentials.restype = None
 
680
 
 
681
    handshake_set_private_extensions = (
 
682
        _library.gnutls_handshake_set_private_extensions)
 
683
    handshake_set_private_extensions.argtypes = [session_t,
 
684
                                                 ctypes.c_int]
 
685
    handshake_set_private_extensions.restype = None
 
686
 
 
687
    credentials_set = _library.gnutls_credentials_set
 
688
    credentials_set.argtypes = [session_t, credentials_type_t,
 
689
                                ctypes.c_void_p]
 
690
    credentials_set.restype = _error_code
 
691
 
 
692
    strerror = _library.gnutls_strerror
 
693
    strerror.argtypes = [ctypes.c_int]
 
694
    strerror.restype = ctypes.c_char_p
 
695
 
 
696
    certificate_type_get = _library.gnutls_certificate_type_get
 
697
    certificate_type_get.argtypes = [session_t]
 
698
    certificate_type_get.restype = _error_code
 
699
 
 
700
    certificate_get_peers = _library.gnutls_certificate_get_peers
 
701
    certificate_get_peers.argtypes = [session_t,
 
702
                                      ctypes.POINTER(ctypes.c_uint)]
 
703
    certificate_get_peers.restype = ctypes.POINTER(datum_t)
 
704
 
 
705
    global_set_log_level = _library.gnutls_global_set_log_level
 
706
    global_set_log_level.argtypes = [ctypes.c_int]
 
707
    global_set_log_level.restype = None
 
708
 
 
709
    global_set_log_function = _library.gnutls_global_set_log_function
 
710
    global_set_log_function.argtypes = [log_func]
 
711
    global_set_log_function.restype = None
 
712
 
 
713
    deinit = _library.gnutls_deinit
 
714
    deinit.argtypes = [session_t]
 
715
    deinit.restype = None
 
716
 
 
717
    handshake = _library.gnutls_handshake
 
718
    handshake.argtypes = [session_t]
 
719
    handshake.restype = _error_code
 
720
    handshake.errcheck = _retry_on_error
 
721
 
 
722
    transport_set_ptr = _library.gnutls_transport_set_ptr
 
723
    transport_set_ptr.argtypes = [session_t, transport_ptr_t]
 
724
    transport_set_ptr.restype = None
 
725
 
 
726
    bye = _library.gnutls_bye
 
727
    bye.argtypes = [session_t, close_request_t]
 
728
    bye.restype = _error_code
 
729
    bye.errcheck = _retry_on_error
 
730
 
 
731
    check_version = _library.gnutls_check_version
 
732
    check_version.argtypes = [ctypes.c_char_p]
 
733
    check_version.restype = ctypes.c_char_p
 
734
 
 
735
    # All the function declarations below are from gnutls/openpgp.h
 
736
 
 
737
    openpgp_crt_init = _library.gnutls_openpgp_crt_init
 
738
    openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
 
739
    openpgp_crt_init.restype = _error_code
 
740
 
 
741
    openpgp_crt_import = _library.gnutls_openpgp_crt_import
 
742
    openpgp_crt_import.argtypes = [openpgp_crt_t,
 
743
                                   ctypes.POINTER(datum_t),
 
744
                                   openpgp_crt_fmt_t]
 
745
    openpgp_crt_import.restype = _error_code
 
746
 
 
747
    openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
 
748
    openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
 
749
                                        ctypes.POINTER(ctypes.c_uint)]
 
750
    openpgp_crt_verify_self.restype = _error_code
 
751
 
 
752
    openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
 
753
    openpgp_crt_deinit.argtypes = [openpgp_crt_t]
 
754
    openpgp_crt_deinit.restype = None
 
755
 
 
756
    openpgp_crt_get_fingerprint = (
 
757
        _library.gnutls_openpgp_crt_get_fingerprint)
 
758
    openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
 
759
                                            ctypes.c_void_p,
 
760
                                            ctypes.POINTER(
 
761
                                                ctypes.c_size_t)]
 
762
    openpgp_crt_get_fingerprint.restype = _error_code
 
763
 
 
764
    # Remove non-public functions
 
765
    del _error_code, _retry_on_error
 
766
# Create the global "gnutls" object, simulating a module
 
767
gnutls = GnuTLS()
 
768
 
 
769
 
 
770
def call_pipe(connection,       # : multiprocessing.Connection
 
771
              func, *args, **kwargs):
 
772
    """This function is meant to be called by multiprocessing.Process
 
773
 
 
774
    This function runs func(*args, **kwargs), and writes the resulting
 
775
    return value on the provided multiprocessing.Connection.
 
776
    """
 
777
    connection.send(func(*args, **kwargs))
 
778
    connection.close()
 
779
 
 
780
 
267
781
class Client(object):
268
782
    """A representation of a client host served by this server.
269
 
    
 
783
 
270
784
    Attributes:
271
 
    _approved:   bool(); 'None' if not yet approved/disapproved
 
785
    approved:   bool(); 'None' if not yet approved/disapproved
272
786
    approval_delay: datetime.timedelta(); Time to wait for approval
273
787
    approval_duration: datetime.timedelta(); Duration of one approval
274
788
    checker:    subprocess.Popen(); a running checker process used
275
789
                                    to see if the client lives.
276
790
                                    'None' if no process is running.
277
 
    checker_callback_tag: a gobject event source tag, or None
 
791
    checker_callback_tag: a GLib event source tag, or None
278
792
    checker_command: string; External command which is run to check
279
793
                     if client lives.  %() expansions are done at
280
794
                     runtime with vars(self) as dict, so that for
281
795
                     instance %(name)s can be used in the command.
282
 
    checker_initiator_tag: a gobject event source tag, or None
 
796
    checker_initiator_tag: a GLib event source tag, or None
283
797
    created:    datetime.datetime(); (UTC) object creation
 
798
    client_structure: Object describing what attributes a client has
 
799
                      and is used for storing the client at exit
284
800
    current_checker_command: string; current running checker_command
285
 
    disable_hook:  If set, called by disable() as disable_hook(self)
286
 
    disable_initiator_tag: a gobject event source tag, or None
 
801
    disable_initiator_tag: a GLib event source tag, or None
287
802
    enabled:    bool()
288
803
    fingerprint: string (40 or 32 hexadecimal digits); used to
289
804
                 uniquely identify the client
291
806
    interval:   datetime.timedelta(); How often to start a new checker
292
807
    last_approval_request: datetime.datetime(); (UTC) or None
293
808
    last_checked_ok: datetime.datetime(); (UTC) or None
294
 
    last_enabled: datetime.datetime(); (UTC)
 
809
    last_checker_status: integer between 0 and 255 reflecting exit
 
810
                         status of last checker. -1 reflects crashed
 
811
                         checker, -2 means no checker completed yet.
 
812
    last_checker_signal: The signal which killed the last checker, if
 
813
                         last_checker_status is -1
 
814
    last_enabled: datetime.datetime(); (UTC) or None
295
815
    name:       string; from the config file, used in log messages and
296
816
                        D-Bus identifiers
297
817
    secret:     bytestring; sent verbatim (over TLS) to client
298
818
    timeout:    datetime.timedelta(); How long from last_checked_ok
299
819
                                      until this client is disabled
 
820
    extended_timeout:   extra long timeout when secret has been sent
300
821
    runtime_expansions: Allowed attributes for runtime expansion.
 
822
    expires:    datetime.datetime(); time (UTC) when a client will be
 
823
                disabled, or None
 
824
    server_settings: The server_settings dict from main()
301
825
    """
302
 
    
 
826
 
303
827
    runtime_expansions = ("approval_delay", "approval_duration",
304
 
                          "created", "enabled", "fingerprint",
305
 
                          "host", "interval", "last_checked_ok",
 
828
                          "created", "enabled", "expires",
 
829
                          "fingerprint", "host", "interval",
 
830
                          "last_approval_request", "last_checked_ok",
306
831
                          "last_enabled", "name", "timeout")
307
 
    
 
832
    client_defaults = {
 
833
        "timeout": "PT5M",
 
834
        "extended_timeout": "PT15M",
 
835
        "interval": "PT2M",
 
836
        "checker": "fping -q -- %%(host)s",
 
837
        "host": "",
 
838
        "approval_delay": "PT0S",
 
839
        "approval_duration": "PT1S",
 
840
        "approved_by_default": "True",
 
841
        "enabled": "True",
 
842
    }
 
843
 
308
844
    @staticmethod
309
 
    def _timedelta_to_milliseconds(td):
310
 
        "Convert a datetime.timedelta() to milliseconds"
311
 
        return ((td.days * 24 * 60 * 60 * 1000)
312
 
                + (td.seconds * 1000)
313
 
                + (td.microseconds // 1000))
314
 
    
315
 
    def timeout_milliseconds(self):
316
 
        "Return the 'timeout' attribute in milliseconds"
317
 
        return self._timedelta_to_milliseconds(self.timeout)
318
 
    
319
 
    def interval_milliseconds(self):
320
 
        "Return the 'interval' attribute in milliseconds"
321
 
        return self._timedelta_to_milliseconds(self.interval)
322
 
 
323
 
    def approval_delay_milliseconds(self):
324
 
        return self._timedelta_to_milliseconds(self.approval_delay)
325
 
    
326
 
    def __init__(self, name = None, disable_hook=None, config=None):
327
 
        """Note: the 'checker' key in 'config' sets the
328
 
        'checker_command' attribute and *not* the 'checker'
329
 
        attribute."""
 
845
    def config_parser(config):
 
846
        """Construct a new dict of client settings of this form:
 
847
        { client_name: {setting_name: value, ...}, ...}
 
848
        with exceptions for any special settings as defined above.
 
849
        NOTE: Must be a pure function. Must return the same result
 
850
        value given the same arguments.
 
851
        """
 
852
        settings = {}
 
853
        for client_name in config.sections():
 
854
            section = dict(config.items(client_name))
 
855
            client = settings[client_name] = {}
 
856
 
 
857
            client["host"] = section["host"]
 
858
            # Reformat values from string types to Python types
 
859
            client["approved_by_default"] = config.getboolean(
 
860
                client_name, "approved_by_default")
 
861
            client["enabled"] = config.getboolean(client_name,
 
862
                                                  "enabled")
 
863
 
 
864
            # Uppercase and remove spaces from fingerprint for later
 
865
            # comparison purposes with return value from the
 
866
            # fingerprint() function
 
867
            client["fingerprint"] = (section["fingerprint"].upper()
 
868
                                     .replace(" ", ""))
 
869
            if "secret" in section:
 
870
                client["secret"] = codecs.decode(section["secret"]
 
871
                                                 .encode("utf-8"),
 
872
                                                 "base64")
 
873
            elif "secfile" in section:
 
874
                with open(os.path.expanduser(os.path.expandvars
 
875
                                             (section["secfile"])),
 
876
                          "rb") as secfile:
 
877
                    client["secret"] = secfile.read()
 
878
            else:
 
879
                raise TypeError("No secret or secfile for section {}"
 
880
                                .format(section))
 
881
            client["timeout"] = string_to_delta(section["timeout"])
 
882
            client["extended_timeout"] = string_to_delta(
 
883
                section["extended_timeout"])
 
884
            client["interval"] = string_to_delta(section["interval"])
 
885
            client["approval_delay"] = string_to_delta(
 
886
                section["approval_delay"])
 
887
            client["approval_duration"] = string_to_delta(
 
888
                section["approval_duration"])
 
889
            client["checker_command"] = section["checker"]
 
890
            client["last_approval_request"] = None
 
891
            client["last_checked_ok"] = None
 
892
            client["last_checker_status"] = -2
 
893
 
 
894
        return settings
 
895
 
 
896
    def __init__(self, settings, name=None, server_settings=None):
330
897
        self.name = name
331
 
        if config is None:
332
 
            config = {}
 
898
        if server_settings is None:
 
899
            server_settings = {}
 
900
        self.server_settings = server_settings
 
901
        # adding all client settings
 
902
        for setting, value in settings.items():
 
903
            setattr(self, setting, value)
 
904
 
 
905
        if self.enabled:
 
906
            if not hasattr(self, "last_enabled"):
 
907
                self.last_enabled = datetime.datetime.utcnow()
 
908
            if not hasattr(self, "expires"):
 
909
                self.expires = (datetime.datetime.utcnow()
 
910
                                + self.timeout)
 
911
        else:
 
912
            self.last_enabled = None
 
913
            self.expires = None
 
914
 
333
915
        logger.debug("Creating client %r", self.name)
334
 
        # Uppercase and remove spaces from fingerprint for later
335
 
        # comparison purposes with return value from the fingerprint()
336
 
        # function
337
 
        self.fingerprint = (config["fingerprint"].upper()
338
 
                            .replace(" ", ""))
339
916
        logger.debug("  Fingerprint: %s", self.fingerprint)
340
 
        if "secret" in config:
341
 
            self.secret = config["secret"].decode("base64")
342
 
        elif "secfile" in config:
343
 
            with open(os.path.expanduser(os.path.expandvars
344
 
                                         (config["secfile"])),
345
 
                      "rb") as secfile:
346
 
                self.secret = secfile.read()
347
 
        else:
348
 
            raise TypeError("No secret or secfile for client %s"
349
 
                            % self.name)
350
 
        self.host = config.get("host", "")
351
 
        self.created = datetime.datetime.utcnow()
352
 
        self.enabled = False
353
 
        self.last_approval_request = None
354
 
        self.last_enabled = None
355
 
        self.last_checked_ok = None
356
 
        self.timeout = string_to_delta(config["timeout"])
357
 
        self.interval = string_to_delta(config["interval"])
358
 
        self.disable_hook = disable_hook
 
917
        self.created = settings.get("created",
 
918
                                    datetime.datetime.utcnow())
 
919
 
 
920
        # attributes specific for this server instance
359
921
        self.checker = None
360
922
        self.checker_initiator_tag = None
361
923
        self.disable_initiator_tag = None
362
924
        self.checker_callback_tag = None
363
 
        self.checker_command = config["checker"]
364
925
        self.current_checker_command = None
365
 
        self.last_connect = None
366
 
        self._approved = None
367
 
        self.approved_by_default = config.get("approved_by_default",
368
 
                                              True)
 
926
        self.approved = None
369
927
        self.approvals_pending = 0
370
 
        self.approval_delay = string_to_delta(
371
 
            config["approval_delay"])
372
 
        self.approval_duration = string_to_delta(
373
 
            config["approval_duration"])
374
 
        self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())
375
 
    
 
928
        self.changedstate = multiprocessing_manager.Condition(
 
929
            multiprocessing_manager.Lock())
 
930
        self.client_structure = [attr
 
931
                                 for attr in self.__dict__.keys()
 
932
                                 if not attr.startswith("_")]
 
933
        self.client_structure.append("client_structure")
 
934
 
 
935
        for name, t in inspect.getmembers(
 
936
                type(self), lambda obj: isinstance(obj, property)):
 
937
            if not name.startswith("_"):
 
938
                self.client_structure.append(name)
 
939
 
 
940
    # Send notice to process children that client state has changed
376
941
    def send_changedstate(self):
377
 
        self.changedstate.acquire()
378
 
        self.changedstate.notify_all()
379
 
        self.changedstate.release()
380
 
        
 
942
        with self.changedstate:
 
943
            self.changedstate.notify_all()
 
944
 
381
945
    def enable(self):
382
946
        """Start this client's checker and timeout hooks"""
383
947
        if getattr(self, "enabled", False):
384
948
            # Already enabled
385
949
            return
386
 
        self.send_changedstate()
 
950
        self.expires = datetime.datetime.utcnow() + self.timeout
 
951
        self.enabled = True
387
952
        self.last_enabled = datetime.datetime.utcnow()
388
 
        # Schedule a new checker to be started an 'interval' from now,
389
 
        # and every interval from then on.
390
 
        self.checker_initiator_tag = (gobject.timeout_add
391
 
                                      (self.interval_milliseconds(),
392
 
                                       self.start_checker))
393
 
        # Schedule a disable() when 'timeout' has passed
394
 
        self.disable_initiator_tag = (gobject.timeout_add
395
 
                                   (self.timeout_milliseconds(),
396
 
                                    self.disable))
397
 
        self.enabled = True
398
 
        # Also start a new checker *right now*.
399
 
        self.start_checker()
400
 
    
 
953
        self.init_checker()
 
954
        self.send_changedstate()
 
955
 
401
956
    def disable(self, quiet=True):
402
957
        """Disable this client."""
403
958
        if not getattr(self, "enabled", False):
404
959
            return False
405
960
        if not quiet:
406
 
            self.send_changedstate()
407
 
        if not quiet:
408
961
            logger.info("Disabling client %s", self.name)
409
 
        if getattr(self, "disable_initiator_tag", False):
410
 
            gobject.source_remove(self.disable_initiator_tag)
 
962
        if getattr(self, "disable_initiator_tag", None) is not None:
 
963
            GLib.source_remove(self.disable_initiator_tag)
411
964
            self.disable_initiator_tag = None
412
 
        if getattr(self, "checker_initiator_tag", False):
413
 
            gobject.source_remove(self.checker_initiator_tag)
 
965
        self.expires = None
 
966
        if getattr(self, "checker_initiator_tag", None) is not None:
 
967
            GLib.source_remove(self.checker_initiator_tag)
414
968
            self.checker_initiator_tag = None
415
969
        self.stop_checker()
416
 
        if self.disable_hook:
417
 
            self.disable_hook(self)
418
970
        self.enabled = False
419
 
        # Do not run this again if called by a gobject.timeout_add
 
971
        if not quiet:
 
972
            self.send_changedstate()
 
973
        # Do not run this again if called by a GLib.timeout_add
420
974
        return False
421
 
    
 
975
 
422
976
    def __del__(self):
423
 
        self.disable_hook = None
424
977
        self.disable()
425
 
    
426
 
    def checker_callback(self, pid, condition, command):
 
978
 
 
979
    def init_checker(self):
 
980
        # Schedule a new checker to be started an 'interval' from now,
 
981
        # and every interval from then on.
 
982
        if self.checker_initiator_tag is not None:
 
983
            GLib.source_remove(self.checker_initiator_tag)
 
984
        self.checker_initiator_tag = GLib.timeout_add(
 
985
            int(self.interval.total_seconds() * 1000),
 
986
            self.start_checker)
 
987
        # Schedule a disable() when 'timeout' has passed
 
988
        if self.disable_initiator_tag is not None:
 
989
            GLib.source_remove(self.disable_initiator_tag)
 
990
        self.disable_initiator_tag = GLib.timeout_add(
 
991
            int(self.timeout.total_seconds() * 1000), self.disable)
 
992
        # Also start a new checker *right now*.
 
993
        self.start_checker()
 
994
 
 
995
    def checker_callback(self, source, condition, connection,
 
996
                         command):
427
997
        """The checker has completed, so take appropriate actions."""
428
998
        self.checker_callback_tag = None
429
999
        self.checker = None
430
 
        if os.WIFEXITED(condition):
431
 
            exitstatus = os.WEXITSTATUS(condition)
432
 
            if exitstatus == 0:
 
1000
        # Read return code from connection (see call_pipe)
 
1001
        returncode = connection.recv()
 
1002
        connection.close()
 
1003
 
 
1004
        if returncode >= 0:
 
1005
            self.last_checker_status = returncode
 
1006
            self.last_checker_signal = None
 
1007
            if self.last_checker_status == 0:
433
1008
                logger.info("Checker for %(name)s succeeded",
434
1009
                            vars(self))
435
1010
                self.checked_ok()
436
1011
            else:
437
 
                logger.info("Checker for %(name)s failed",
438
 
                            vars(self))
 
1012
                logger.info("Checker for %(name)s failed", vars(self))
439
1013
        else:
 
1014
            self.last_checker_status = -1
 
1015
            self.last_checker_signal = -returncode
440
1016
            logger.warning("Checker for %(name)s crashed?",
441
1017
                           vars(self))
442
 
    
 
1018
        return False
 
1019
 
443
1020
    def checked_ok(self):
444
 
        """Bump up the timeout for this client.
445
 
        
446
 
        This should only be called when the client has been seen,
447
 
        alive and well.
448
 
        """
 
1021
        """Assert that the client has been seen, alive and well."""
449
1022
        self.last_checked_ok = datetime.datetime.utcnow()
450
 
        gobject.source_remove(self.disable_initiator_tag)
451
 
        self.disable_initiator_tag = (gobject.timeout_add
452
 
                                      (self.timeout_milliseconds(),
453
 
                                       self.disable))
454
 
    
 
1023
        self.last_checker_status = 0
 
1024
        self.last_checker_signal = None
 
1025
        self.bump_timeout()
 
1026
 
 
1027
    def bump_timeout(self, timeout=None):
 
1028
        """Bump up the timeout for this client."""
 
1029
        if timeout is None:
 
1030
            timeout = self.timeout
 
1031
        if self.disable_initiator_tag is not None:
 
1032
            GLib.source_remove(self.disable_initiator_tag)
 
1033
            self.disable_initiator_tag = None
 
1034
        if getattr(self, "enabled", False):
 
1035
            self.disable_initiator_tag = GLib.timeout_add(
 
1036
                int(timeout.total_seconds() * 1000), self.disable)
 
1037
            self.expires = datetime.datetime.utcnow() + timeout
 
1038
 
455
1039
    def need_approval(self):
456
1040
        self.last_approval_request = datetime.datetime.utcnow()
457
 
    
 
1041
 
458
1042
    def start_checker(self):
459
1043
        """Start a new checker subprocess if one is not running.
460
 
        
 
1044
 
461
1045
        If a checker already exists, leave it running and do
462
1046
        nothing."""
463
1047
        # The reason for not killing a running checker is that if we
464
 
        # did that, then if a checker (for some reason) started
465
 
        # running slowly and taking more than 'interval' time, the
466
 
        # client would inevitably timeout, since no checker would get
467
 
        # a chance to run to completion.  If we instead leave running
 
1048
        # did that, and if a checker (for some reason) started running
 
1049
        # slowly and taking more than 'interval' time, then the client
 
1050
        # would inevitably timeout, since no checker would get a
 
1051
        # chance to run to completion.  If we instead leave running
468
1052
        # checkers alone, the checker would have to take more time
469
1053
        # than 'timeout' for the client to be disabled, which is as it
470
1054
        # should be.
471
 
        
472
 
        # If a checker exists, make sure it is not a zombie
473
 
        try:
474
 
            pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
475
 
        except (AttributeError, OSError) as error:
476
 
            if (isinstance(error, OSError)
477
 
                and error.errno != errno.ECHILD):
478
 
                raise error
479
 
        else:
480
 
            if pid:
481
 
                logger.warning("Checker was a zombie")
482
 
                gobject.source_remove(self.checker_callback_tag)
483
 
                self.checker_callback(pid, status,
484
 
                                      self.current_checker_command)
 
1055
 
 
1056
        if self.checker is not None and not self.checker.is_alive():
 
1057
            logger.warning("Checker was not alive; joining")
 
1058
            self.checker.join()
 
1059
            self.checker = None
485
1060
        # Start a new checker if needed
486
1061
        if self.checker is None:
 
1062
            # Escape attributes for the shell
 
1063
            escaped_attrs = {
 
1064
                attr: re.escape(str(getattr(self, attr)))
 
1065
                for attr in self.runtime_expansions}
487
1066
            try:
488
 
                # In case checker_command has exactly one % operator
489
 
                command = self.checker_command % self.host
490
 
            except TypeError:
491
 
                # Escape attributes for the shell
492
 
                escaped_attrs = dict(
493
 
                    (attr,
494
 
                     re.escape(unicode(str(getattr(self, attr, "")),
495
 
                                       errors=
496
 
                                       'replace')))
497
 
                    for attr in
498
 
                    self.runtime_expansions)
499
 
 
500
 
                try:
501
 
                    command = self.checker_command % escaped_attrs
502
 
                except TypeError as error:
503
 
                    logger.error('Could not format string "%s":'
504
 
                                 ' %s', self.checker_command, error)
505
 
                    return True # Try again later
 
1067
                command = self.checker_command % escaped_attrs
 
1068
            except TypeError as error:
 
1069
                logger.error('Could not format string "%s"',
 
1070
                             self.checker_command,
 
1071
                             exc_info=error)
 
1072
                return True     # Try again later
506
1073
            self.current_checker_command = command
507
 
            try:
508
 
                logger.info("Starting checker %r for %s",
509
 
                            command, self.name)
510
 
                # We don't need to redirect stdout and stderr, since
511
 
                # in normal mode, that is already done by daemon(),
512
 
                # and in debug mode we don't want to.  (Stdin is
513
 
                # always replaced by /dev/null.)
514
 
                self.checker = subprocess.Popen(command,
515
 
                                                close_fds=True,
516
 
                                                shell=True, cwd="/")
517
 
                self.checker_callback_tag = (gobject.child_watch_add
518
 
                                             (self.checker.pid,
519
 
                                              self.checker_callback,
520
 
                                              data=command))
521
 
                # The checker may have completed before the gobject
522
 
                # watch was added.  Check for this.
523
 
                pid, status = os.waitpid(self.checker.pid, os.WNOHANG)
524
 
                if pid:
525
 
                    gobject.source_remove(self.checker_callback_tag)
526
 
                    self.checker_callback(pid, status, command)
527
 
            except OSError as error:
528
 
                logger.error("Failed to start subprocess: %s",
529
 
                             error)
530
 
        # Re-run this periodically if run by gobject.timeout_add
 
1074
            logger.info("Starting checker %r for %s", command,
 
1075
                        self.name)
 
1076
            # We don't need to redirect stdout and stderr, since
 
1077
            # in normal mode, that is already done by daemon(),
 
1078
            # and in debug mode we don't want to.  (Stdin is
 
1079
            # always replaced by /dev/null.)
 
1080
            # The exception is when not debugging but nevertheless
 
1081
            # running in the foreground; use the previously
 
1082
            # created wnull.
 
1083
            popen_args = {"close_fds": True,
 
1084
                          "shell": True,
 
1085
                          "cwd": "/"}
 
1086
            if (not self.server_settings["debug"]
 
1087
                and self.server_settings["foreground"]):
 
1088
                popen_args.update({"stdout": wnull,
 
1089
                                   "stderr": wnull})
 
1090
            pipe = multiprocessing.Pipe(duplex=False)
 
1091
            self.checker = multiprocessing.Process(
 
1092
                target=call_pipe,
 
1093
                args=(pipe[1], subprocess.call, command),
 
1094
                kwargs=popen_args)
 
1095
            self.checker.start()
 
1096
            self.checker_callback_tag = GLib.io_add_watch(
 
1097
                pipe[0].fileno(), GLib.IO_IN,
 
1098
                self.checker_callback, pipe[0], command)
 
1099
        # Re-run this periodically if run by GLib.timeout_add
531
1100
        return True
532
 
    
 
1101
 
533
1102
    def stop_checker(self):
534
1103
        """Force the checker process, if any, to stop."""
535
1104
        if self.checker_callback_tag:
536
 
            gobject.source_remove(self.checker_callback_tag)
 
1105
            GLib.source_remove(self.checker_callback_tag)
537
1106
            self.checker_callback_tag = None
538
1107
        if getattr(self, "checker", None) is None:
539
1108
            return
540
1109
        logger.debug("Stopping checker for %(name)s", vars(self))
541
 
        try:
542
 
            os.kill(self.checker.pid, signal.SIGTERM)
543
 
            #time.sleep(0.5)
544
 
            #if self.checker.poll() is None:
545
 
            #    os.kill(self.checker.pid, signal.SIGKILL)
546
 
        except OSError as error:
547
 
            if error.errno != errno.ESRCH: # No such process
548
 
                raise
 
1110
        self.checker.terminate()
549
1111
        self.checker = None
550
1112
 
551
 
def dbus_service_property(dbus_interface, signature="v",
552
 
                          access="readwrite", byte_arrays=False):
 
1113
 
 
1114
def dbus_service_property(dbus_interface,
 
1115
                          signature="v",
 
1116
                          access="readwrite",
 
1117
                          byte_arrays=False):
553
1118
    """Decorators for marking methods of a DBusObjectWithProperties to
554
1119
    become properties on the D-Bus.
555
 
    
 
1120
 
556
1121
    The decorated method will be called with no arguments by "Get"
557
1122
    and with one argument by "Set".
558
 
    
 
1123
 
559
1124
    The parameters, where they are supported, are the same as
560
1125
    dbus.service.method, except there is only "signature", since the
561
1126
    type from Get() and the type sent to Set() is the same.
564
1129
    # "Set" method, so we fail early here:
565
1130
    if byte_arrays and signature != "ay":
566
1131
        raise ValueError("Byte arrays not supported for non-'ay'"
567
 
                         " signature %r" % signature)
 
1132
                         " signature {!r}".format(signature))
 
1133
 
568
1134
    def decorator(func):
569
1135
        func._dbus_is_property = True
570
1136
        func._dbus_interface = dbus_interface
573
1139
        func._dbus_name = func.__name__
574
1140
        if func._dbus_name.endswith("_dbus_property"):
575
1141
            func._dbus_name = func._dbus_name[:-14]
576
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
577
 
        return func
 
1142
        func._dbus_get_args_options = {'byte_arrays': byte_arrays}
 
1143
        return func
 
1144
 
 
1145
    return decorator
 
1146
 
 
1147
 
 
1148
def dbus_interface_annotations(dbus_interface):
 
1149
    """Decorator for marking functions returning interface annotations
 
1150
 
 
1151
    Usage:
 
1152
 
 
1153
    @dbus_interface_annotations("org.example.Interface")
 
1154
    def _foo(self):  # Function name does not matter
 
1155
        return {"org.freedesktop.DBus.Deprecated": "true",
 
1156
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
 
1157
                    "false"}
 
1158
    """
 
1159
 
 
1160
    def decorator(func):
 
1161
        func._dbus_is_interface = True
 
1162
        func._dbus_interface = dbus_interface
 
1163
        func._dbus_name = dbus_interface
 
1164
        return func
 
1165
 
 
1166
    return decorator
 
1167
 
 
1168
 
 
1169
def dbus_annotations(annotations):
 
1170
    """Decorator to annotate D-Bus methods, signals or properties
 
1171
    Usage:
 
1172
 
 
1173
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
 
1174
                       "org.freedesktop.DBus.Property."
 
1175
                       "EmitsChangedSignal": "false"})
 
1176
    @dbus_service_property("org.example.Interface", signature="b",
 
1177
                           access="r")
 
1178
    def Property_dbus_property(self):
 
1179
        return dbus.Boolean(False)
 
1180
 
 
1181
    See also the DBusObjectWithAnnotations class.
 
1182
    """
 
1183
 
 
1184
    def decorator(func):
 
1185
        func._dbus_annotations = annotations
 
1186
        return func
 
1187
 
578
1188
    return decorator
579
1189
 
580
1190
 
581
1191
class DBusPropertyException(dbus.exceptions.DBusException):
582
1192
    """A base class for D-Bus property-related exceptions
583
1193
    """
584
 
    def __unicode__(self):
585
 
        return unicode(str(self))
 
1194
    pass
586
1195
 
587
1196
 
588
1197
class DBusPropertyAccessException(DBusPropertyException):
597
1206
    pass
598
1207
 
599
1208
 
600
 
class DBusObjectWithProperties(dbus.service.Object):
 
1209
class DBusObjectWithAnnotations(dbus.service.Object):
 
1210
    """A D-Bus object with annotations.
 
1211
 
 
1212
    Classes inheriting from this can use the dbus_annotations
 
1213
    decorator to add annotations to methods or signals.
 
1214
    """
 
1215
 
 
1216
    @staticmethod
 
1217
    def _is_dbus_thing(thing):
 
1218
        """Returns a function testing if an attribute is a D-Bus thing
 
1219
 
 
1220
        If called like _is_dbus_thing("method") it returns a function
 
1221
        suitable for use as predicate to inspect.getmembers().
 
1222
        """
 
1223
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
 
1224
                                   False)
 
1225
 
 
1226
    def _get_all_dbus_things(self, thing):
 
1227
        """Returns a generator of (name, attribute) pairs
 
1228
        """
 
1229
        return ((getattr(athing.__get__(self), "_dbus_name", name),
 
1230
                 athing.__get__(self))
 
1231
                for cls in self.__class__.__mro__
 
1232
                for name, athing in
 
1233
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
 
1234
 
 
1235
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1236
                         out_signature="s",
 
1237
                         path_keyword='object_path',
 
1238
                         connection_keyword='connection')
 
1239
    def Introspect(self, object_path, connection):
 
1240
        """Overloading of standard D-Bus method.
 
1241
 
 
1242
        Inserts annotation tags on methods and signals.
 
1243
        """
 
1244
        xmlstring = dbus.service.Object.Introspect(self, object_path,
 
1245
                                                   connection)
 
1246
        try:
 
1247
            document = xml.dom.minidom.parseString(xmlstring)
 
1248
 
 
1249
            for if_tag in document.getElementsByTagName("interface"):
 
1250
                # Add annotation tags
 
1251
                for typ in ("method", "signal"):
 
1252
                    for tag in if_tag.getElementsByTagName(typ):
 
1253
                        annots = dict()
 
1254
                        for name, prop in (self.
 
1255
                                           _get_all_dbus_things(typ)):
 
1256
                            if (name == tag.getAttribute("name")
 
1257
                                and prop._dbus_interface
 
1258
                                == if_tag.getAttribute("name")):
 
1259
                                annots.update(getattr(
 
1260
                                    prop, "_dbus_annotations", {}))
 
1261
                        for name, value in annots.items():
 
1262
                            ann_tag = document.createElement(
 
1263
                                "annotation")
 
1264
                            ann_tag.setAttribute("name", name)
 
1265
                            ann_tag.setAttribute("value", value)
 
1266
                            tag.appendChild(ann_tag)
 
1267
                # Add interface annotation tags
 
1268
                for annotation, value in dict(
 
1269
                    itertools.chain.from_iterable(
 
1270
                        annotations().items()
 
1271
                        for name, annotations
 
1272
                        in self._get_all_dbus_things("interface")
 
1273
                        if name == if_tag.getAttribute("name")
 
1274
                        )).items():
 
1275
                    ann_tag = document.createElement("annotation")
 
1276
                    ann_tag.setAttribute("name", annotation)
 
1277
                    ann_tag.setAttribute("value", value)
 
1278
                    if_tag.appendChild(ann_tag)
 
1279
                # Fix argument name for the Introspect method itself
 
1280
                if (if_tag.getAttribute("name")
 
1281
                    == dbus.INTROSPECTABLE_IFACE):
 
1282
                    for cn in if_tag.getElementsByTagName("method"):
 
1283
                        if cn.getAttribute("name") == "Introspect":
 
1284
                            for arg in cn.getElementsByTagName("arg"):
 
1285
                                if (arg.getAttribute("direction")
 
1286
                                    == "out"):
 
1287
                                    arg.setAttribute("name",
 
1288
                                                     "xml_data")
 
1289
            xmlstring = document.toxml("utf-8")
 
1290
            document.unlink()
 
1291
        except (AttributeError, xml.dom.DOMException,
 
1292
                xml.parsers.expat.ExpatError) as error:
 
1293
            logger.error("Failed to override Introspection method",
 
1294
                         exc_info=error)
 
1295
        return xmlstring
 
1296
 
 
1297
 
 
1298
class DBusObjectWithProperties(DBusObjectWithAnnotations):
601
1299
    """A D-Bus object with properties.
602
1300
 
603
1301
    Classes inheriting from this can use the dbus_service_property
604
1302
    decorator to expose methods as D-Bus properties.  It exposes the
605
1303
    standard Get(), Set(), and GetAll() methods on the D-Bus.
606
1304
    """
607
 
    
608
 
    @staticmethod
609
 
    def _is_dbus_property(obj):
610
 
        return getattr(obj, "_dbus_is_property", False)
611
 
    
612
 
    def _get_all_dbus_properties(self):
613
 
        """Returns a generator of (name, attribute) pairs
614
 
        """
615
 
        return ((prop._dbus_name, prop)
616
 
                for name, prop in
617
 
                inspect.getmembers(self, self._is_dbus_property))
618
 
    
 
1305
 
619
1306
    def _get_dbus_property(self, interface_name, property_name):
620
1307
        """Returns a bound method if one exists which is a D-Bus
621
1308
        property with the specified name and interface.
622
1309
        """
623
 
        for name in (property_name,
624
 
                     property_name + "_dbus_property"):
625
 
            prop = getattr(self, name, None)
626
 
            if (prop is None
627
 
                or not self._is_dbus_property(prop)
628
 
                or prop._dbus_name != property_name
629
 
                or (interface_name and prop._dbus_interface
630
 
                    and interface_name != prop._dbus_interface)):
631
 
                continue
632
 
            return prop
 
1310
        for cls in self.__class__.__mro__:
 
1311
            for name, value in inspect.getmembers(
 
1312
                    cls, self._is_dbus_thing("property")):
 
1313
                if (value._dbus_name == property_name
 
1314
                    and value._dbus_interface == interface_name):
 
1315
                    return value.__get__(self)
 
1316
 
633
1317
        # No such property
634
 
        raise DBusPropertyNotFound(self.dbus_object_path + ":"
635
 
                                   + interface_name + "."
636
 
                                   + property_name)
637
 
    
638
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",
 
1318
        raise DBusPropertyNotFound("{}:{}.{}".format(
 
1319
            self.dbus_object_path, interface_name, property_name))
 
1320
 
 
1321
    @classmethod
 
1322
    def _get_all_interface_names(cls):
 
1323
        """Get a sequence of all interfaces supported by an object"""
 
1324
        return (name for name in set(getattr(getattr(x, attr),
 
1325
                                             "_dbus_interface", None)
 
1326
                                     for x in (inspect.getmro(cls))
 
1327
                                     for attr in dir(x))
 
1328
                if name is not None)
 
1329
 
 
1330
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1331
                         in_signature="ss",
639
1332
                         out_signature="v")
640
1333
    def Get(self, interface_name, property_name):
641
1334
        """Standard D-Bus property Get() method, see D-Bus standard.
647
1340
        if not hasattr(value, "variant_level"):
648
1341
            return value
649
1342
        return type(value)(value, variant_level=value.variant_level+1)
650
 
    
 
1343
 
651
1344
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
652
1345
    def Set(self, interface_name, property_name, value):
653
1346
        """Standard D-Bus property Set() method, see D-Bus standard.
659
1352
            # The byte_arrays option is not supported yet on
660
1353
            # signatures other than "ay".
661
1354
            if prop._dbus_signature != "ay":
662
 
                raise ValueError
663
 
            value = dbus.ByteArray(''.join(unichr(byte)
664
 
                                           for byte in value))
 
1355
                raise ValueError("Byte arrays not supported for non-"
 
1356
                                 "'ay' signature {!r}"
 
1357
                                 .format(prop._dbus_signature))
 
1358
            value = dbus.ByteArray(b''.join(chr(byte)
 
1359
                                            for byte in value))
665
1360
        prop(value)
666
 
    
667
 
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",
 
1361
 
 
1362
    @dbus.service.method(dbus.PROPERTIES_IFACE,
 
1363
                         in_signature="s",
668
1364
                         out_signature="a{sv}")
669
1365
    def GetAll(self, interface_name):
670
1366
        """Standard D-Bus property GetAll() method, see D-Bus
672
1368
 
673
1369
        Note: Will not include properties with access="write".
674
1370
        """
675
 
        all = {}
676
 
        for name, prop in self._get_all_dbus_properties():
 
1371
        properties = {}
 
1372
        for name, prop in self._get_all_dbus_things("property"):
677
1373
            if (interface_name
678
1374
                and interface_name != prop._dbus_interface):
679
1375
                # Interface non-empty but did not match
683
1379
                continue
684
1380
            value = prop()
685
1381
            if not hasattr(value, "variant_level"):
686
 
                all[name] = value
 
1382
                properties[name] = value
687
1383
                continue
688
 
            all[name] = type(value)(value, variant_level=
689
 
                                    value.variant_level+1)
690
 
        return dbus.Dictionary(all, signature="sv")
691
 
    
 
1384
            properties[name] = type(value)(
 
1385
                value, variant_level=value.variant_level + 1)
 
1386
        return dbus.Dictionary(properties, signature="sv")
 
1387
 
 
1388
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
 
1389
    def PropertiesChanged(self, interface_name, changed_properties,
 
1390
                          invalidated_properties):
 
1391
        """Standard D-Bus PropertiesChanged() signal, see D-Bus
 
1392
        standard.
 
1393
        """
 
1394
        pass
 
1395
 
692
1396
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
693
1397
                         out_signature="s",
694
1398
                         path_keyword='object_path',
695
1399
                         connection_keyword='connection')
696
1400
    def Introspect(self, object_path, connection):
697
 
        """Standard D-Bus method, overloaded to insert property tags.
 
1401
        """Overloading of standard D-Bus method.
 
1402
 
 
1403
        Inserts property tags and interface annotation tags.
698
1404
        """
699
 
        xmlstring = dbus.service.Object.Introspect(self, object_path,
700
 
                                                   connection)
 
1405
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1406
                                                         object_path,
 
1407
                                                         connection)
701
1408
        try:
702
1409
            document = xml.dom.minidom.parseString(xmlstring)
 
1410
 
703
1411
            def make_tag(document, name, prop):
704
1412
                e = document.createElement("property")
705
1413
                e.setAttribute("name", name)
706
1414
                e.setAttribute("type", prop._dbus_signature)
707
1415
                e.setAttribute("access", prop._dbus_access)
708
1416
                return e
 
1417
 
709
1418
            for if_tag in document.getElementsByTagName("interface"):
 
1419
                # Add property tags
710
1420
                for tag in (make_tag(document, name, prop)
711
1421
                            for name, prop
712
 
                            in self._get_all_dbus_properties()
 
1422
                            in self._get_all_dbus_things("property")
713
1423
                            if prop._dbus_interface
714
1424
                            == if_tag.getAttribute("name")):
715
1425
                    if_tag.appendChild(tag)
 
1426
                # Add annotation tags for properties
 
1427
                for tag in if_tag.getElementsByTagName("property"):
 
1428
                    annots = dict()
 
1429
                    for name, prop in self._get_all_dbus_things(
 
1430
                            "property"):
 
1431
                        if (name == tag.getAttribute("name")
 
1432
                            and prop._dbus_interface
 
1433
                            == if_tag.getAttribute("name")):
 
1434
                            annots.update(getattr(
 
1435
                                prop, "_dbus_annotations", {}))
 
1436
                    for name, value in annots.items():
 
1437
                        ann_tag = document.createElement(
 
1438
                            "annotation")
 
1439
                        ann_tag.setAttribute("name", name)
 
1440
                        ann_tag.setAttribute("value", value)
 
1441
                        tag.appendChild(ann_tag)
716
1442
                # Add the names to the return values for the
717
1443
                # "org.freedesktop.DBus.Properties" methods
718
1444
                if (if_tag.getAttribute("name")
733
1459
        except (AttributeError, xml.dom.DOMException,
734
1460
                xml.parsers.expat.ExpatError) as error:
735
1461
            logger.error("Failed to override Introspection method",
736
 
                         error)
737
 
        return xmlstring
738
 
 
739
 
 
 
1462
                         exc_info=error)
 
1463
        return xmlstring
 
1464
 
 
1465
 
 
1466
try:
 
1467
    dbus.OBJECT_MANAGER_IFACE
 
1468
except AttributeError:
 
1469
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
 
1470
 
 
1471
 
 
1472
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
 
1473
    """A D-Bus object with an ObjectManager.
 
1474
 
 
1475
    Classes inheriting from this exposes the standard
 
1476
    GetManagedObjects call and the InterfacesAdded and
 
1477
    InterfacesRemoved signals on the standard
 
1478
    "org.freedesktop.DBus.ObjectManager" interface.
 
1479
 
 
1480
    Note: No signals are sent automatically; they must be sent
 
1481
    manually.
 
1482
    """
 
1483
    @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
1484
                         out_signature="a{oa{sa{sv}}}")
 
1485
    def GetManagedObjects(self):
 
1486
        """This function must be overridden"""
 
1487
        raise NotImplementedError()
 
1488
 
 
1489
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
 
1490
                         signature="oa{sa{sv}}")
 
1491
    def InterfacesAdded(self, object_path, interfaces_and_properties):
 
1492
        pass
 
1493
 
 
1494
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
 
1495
    def InterfacesRemoved(self, object_path, interfaces):
 
1496
        pass
 
1497
 
 
1498
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
 
1499
                         out_signature="s",
 
1500
                         path_keyword='object_path',
 
1501
                         connection_keyword='connection')
 
1502
    def Introspect(self, object_path, connection):
 
1503
        """Overloading of standard D-Bus method.
 
1504
 
 
1505
        Override return argument name of GetManagedObjects to be
 
1506
        "objpath_interfaces_and_properties"
 
1507
        """
 
1508
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
 
1509
                                                         object_path,
 
1510
                                                         connection)
 
1511
        try:
 
1512
            document = xml.dom.minidom.parseString(xmlstring)
 
1513
 
 
1514
            for if_tag in document.getElementsByTagName("interface"):
 
1515
                # Fix argument name for the GetManagedObjects method
 
1516
                if (if_tag.getAttribute("name")
 
1517
                    == dbus.OBJECT_MANAGER_IFACE):
 
1518
                    for cn in if_tag.getElementsByTagName("method"):
 
1519
                        if (cn.getAttribute("name")
 
1520
                            == "GetManagedObjects"):
 
1521
                            for arg in cn.getElementsByTagName("arg"):
 
1522
                                if (arg.getAttribute("direction")
 
1523
                                    == "out"):
 
1524
                                    arg.setAttribute(
 
1525
                                        "name",
 
1526
                                        "objpath_interfaces"
 
1527
                                        "_and_properties")
 
1528
            xmlstring = document.toxml("utf-8")
 
1529
            document.unlink()
 
1530
        except (AttributeError, xml.dom.DOMException,
 
1531
                xml.parsers.expat.ExpatError) as error:
 
1532
            logger.error("Failed to override Introspection method",
 
1533
                         exc_info=error)
 
1534
        return xmlstring
 
1535
 
 
1536
 
 
1537
def datetime_to_dbus(dt, variant_level=0):
 
1538
    """Convert a UTC datetime.datetime() to a D-Bus type."""
 
1539
    if dt is None:
 
1540
        return dbus.String("", variant_level=variant_level)
 
1541
    return dbus.String(dt.isoformat(), variant_level=variant_level)
 
1542
 
 
1543
 
 
1544
def alternate_dbus_interfaces(alt_interface_names, deprecate=True):
 
1545
    """A class decorator; applied to a subclass of
 
1546
    dbus.service.Object, it will add alternate D-Bus attributes with
 
1547
    interface names according to the "alt_interface_names" mapping.
 
1548
    Usage:
 
1549
 
 
1550
    @alternate_dbus_interfaces({"org.example.Interface":
 
1551
                                    "net.example.AlternateInterface"})
 
1552
    class SampleDBusObject(dbus.service.Object):
 
1553
        @dbus.service.method("org.example.Interface")
 
1554
        def SampleDBusMethod():
 
1555
            pass
 
1556
 
 
1557
    The above "SampleDBusMethod" on "SampleDBusObject" will be
 
1558
    reachable via two interfaces: "org.example.Interface" and
 
1559
    "net.example.AlternateInterface", the latter of which will have
 
1560
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
 
1561
    "true", unless "deprecate" is passed with a False value.
 
1562
 
 
1563
    This works for methods and signals, and also for D-Bus properties
 
1564
    (from DBusObjectWithProperties) and interfaces (from the
 
1565
    dbus_interface_annotations decorator).
 
1566
    """
 
1567
 
 
1568
    def wrapper(cls):
 
1569
        for orig_interface_name, alt_interface_name in (
 
1570
                alt_interface_names.items()):
 
1571
            attr = {}
 
1572
            interface_names = set()
 
1573
            # Go though all attributes of the class
 
1574
            for attrname, attribute in inspect.getmembers(cls):
 
1575
                # Ignore non-D-Bus attributes, and D-Bus attributes
 
1576
                # with the wrong interface name
 
1577
                if (not hasattr(attribute, "_dbus_interface")
 
1578
                    or not attribute._dbus_interface.startswith(
 
1579
                        orig_interface_name)):
 
1580
                    continue
 
1581
                # Create an alternate D-Bus interface name based on
 
1582
                # the current name
 
1583
                alt_interface = attribute._dbus_interface.replace(
 
1584
                    orig_interface_name, alt_interface_name)
 
1585
                interface_names.add(alt_interface)
 
1586
                # Is this a D-Bus signal?
 
1587
                if getattr(attribute, "_dbus_is_signal", False):
 
1588
                    # Extract the original non-method undecorated
 
1589
                    # function by black magic
 
1590
                    if sys.version_info.major == 2:
 
1591
                        nonmethod_func = (dict(
 
1592
                            zip(attribute.func_code.co_freevars,
 
1593
                                attribute.__closure__))
 
1594
                                          ["func"].cell_contents)
 
1595
                    else:
 
1596
                        nonmethod_func = (dict(
 
1597
                            zip(attribute.__code__.co_freevars,
 
1598
                                attribute.__closure__))
 
1599
                                          ["func"].cell_contents)
 
1600
                    # Create a new, but exactly alike, function
 
1601
                    # object, and decorate it to be a new D-Bus signal
 
1602
                    # with the alternate D-Bus interface name
 
1603
                    new_function = copy_function(nonmethod_func)
 
1604
                    new_function = (dbus.service.signal(
 
1605
                        alt_interface,
 
1606
                        attribute._dbus_signature)(new_function))
 
1607
                    # Copy annotations, if any
 
1608
                    try:
 
1609
                        new_function._dbus_annotations = dict(
 
1610
                            attribute._dbus_annotations)
 
1611
                    except AttributeError:
 
1612
                        pass
 
1613
 
 
1614
                    # Define a creator of a function to call both the
 
1615
                    # original and alternate functions, so both the
 
1616
                    # original and alternate signals gets sent when
 
1617
                    # the function is called
 
1618
                    def fixscope(func1, func2):
 
1619
                        """This function is a scope container to pass
 
1620
                        func1 and func2 to the "call_both" function
 
1621
                        outside of its arguments"""
 
1622
 
 
1623
                        @functools.wraps(func2)
 
1624
                        def call_both(*args, **kwargs):
 
1625
                            """This function will emit two D-Bus
 
1626
                            signals by calling func1 and func2"""
 
1627
                            func1(*args, **kwargs)
 
1628
                            func2(*args, **kwargs)
 
1629
                        # Make wrapper function look like a D-Bus
 
1630
                        # signal
 
1631
                        for name, attr in inspect.getmembers(func2):
 
1632
                            if name.startswith("_dbus_"):
 
1633
                                setattr(call_both, name, attr)
 
1634
 
 
1635
                        return call_both
 
1636
                    # Create the "call_both" function and add it to
 
1637
                    # the class
 
1638
                    attr[attrname] = fixscope(attribute, new_function)
 
1639
                # Is this a D-Bus method?
 
1640
                elif getattr(attribute, "_dbus_is_method", False):
 
1641
                    # Create a new, but exactly alike, function
 
1642
                    # object.  Decorate it to be a new D-Bus method
 
1643
                    # with the alternate D-Bus interface name.  Add it
 
1644
                    # to the class.
 
1645
                    attr[attrname] = (
 
1646
                        dbus.service.method(
 
1647
                            alt_interface,
 
1648
                            attribute._dbus_in_signature,
 
1649
                            attribute._dbus_out_signature)
 
1650
                        (copy_function(attribute)))
 
1651
                    # Copy annotations, if any
 
1652
                    try:
 
1653
                        attr[attrname]._dbus_annotations = dict(
 
1654
                            attribute._dbus_annotations)
 
1655
                    except AttributeError:
 
1656
                        pass
 
1657
                # Is this a D-Bus property?
 
1658
                elif getattr(attribute, "_dbus_is_property", False):
 
1659
                    # Create a new, but exactly alike, function
 
1660
                    # object, and decorate it to be a new D-Bus
 
1661
                    # property with the alternate D-Bus interface
 
1662
                    # name.  Add it to the class.
 
1663
                    attr[attrname] = (dbus_service_property(
 
1664
                        alt_interface, attribute._dbus_signature,
 
1665
                        attribute._dbus_access,
 
1666
                        attribute._dbus_get_args_options
 
1667
                        ["byte_arrays"])
 
1668
                                      (copy_function(attribute)))
 
1669
                    # Copy annotations, if any
 
1670
                    try:
 
1671
                        attr[attrname]._dbus_annotations = dict(
 
1672
                            attribute._dbus_annotations)
 
1673
                    except AttributeError:
 
1674
                        pass
 
1675
                # Is this a D-Bus interface?
 
1676
                elif getattr(attribute, "_dbus_is_interface", False):
 
1677
                    # Create a new, but exactly alike, function
 
1678
                    # object.  Decorate it to be a new D-Bus interface
 
1679
                    # with the alternate D-Bus interface name.  Add it
 
1680
                    # to the class.
 
1681
                    attr[attrname] = (
 
1682
                        dbus_interface_annotations(alt_interface)
 
1683
                        (copy_function(attribute)))
 
1684
            if deprecate:
 
1685
                # Deprecate all alternate interfaces
 
1686
                iname = "_AlternateDBusNames_interface_annotation{}"
 
1687
                for interface_name in interface_names:
 
1688
 
 
1689
                    @dbus_interface_annotations(interface_name)
 
1690
                    def func(self):
 
1691
                        return {"org.freedesktop.DBus.Deprecated":
 
1692
                                "true"}
 
1693
                    # Find an unused name
 
1694
                    for aname in (iname.format(i)
 
1695
                                  for i in itertools.count()):
 
1696
                        if aname not in attr:
 
1697
                            attr[aname] = func
 
1698
                            break
 
1699
            if interface_names:
 
1700
                # Replace the class with a new subclass of it with
 
1701
                # methods, signals, etc. as created above.
 
1702
                if sys.version_info.major == 2:
 
1703
                    cls = type(b"{}Alternate".format(cls.__name__),
 
1704
                               (cls, ), attr)
 
1705
                else:
 
1706
                    cls = type("{}Alternate".format(cls.__name__),
 
1707
                               (cls, ), attr)
 
1708
        return cls
 
1709
 
 
1710
    return wrapper
 
1711
 
 
1712
 
 
1713
@alternate_dbus_interfaces({"se.recompile.Mandos":
 
1714
                            "se.bsnet.fukt.Mandos"})
740
1715
class ClientDBus(Client, DBusObjectWithProperties):
741
1716
    """A Client class using D-Bus
742
 
    
 
1717
 
743
1718
    Attributes:
744
1719
    dbus_object_path: dbus.ObjectPath
745
1720
    bus: dbus.SystemBus()
746
1721
    """
747
 
    
 
1722
 
748
1723
    runtime_expansions = (Client.runtime_expansions
749
 
                          + ("dbus_object_path",))
750
 
    
 
1724
                          + ("dbus_object_path", ))
 
1725
 
 
1726
    _interface = "se.recompile.Mandos.Client"
 
1727
 
751
1728
    # dbus.service.Object doesn't use super(), so we can't either.
752
 
    
753
 
    def __init__(self, bus = None, *args, **kwargs):
754
 
        self._approvals_pending = 0
 
1729
 
 
1730
    def __init__(self, bus=None, *args, **kwargs):
755
1731
        self.bus = bus
756
1732
        Client.__init__(self, *args, **kwargs)
757
1733
        # Only now, when this client is initialized, can it show up on
758
1734
        # the D-Bus
759
 
        client_object_name = unicode(self.name).translate(
 
1735
        client_object_name = str(self.name).translate(
760
1736
            {ord("."): ord("_"),
761
1737
             ord("-"): ord("_")})
762
 
        self.dbus_object_path = (dbus.ObjectPath
763
 
                                 ("/clients/" + client_object_name))
 
1738
        self.dbus_object_path = dbus.ObjectPath(
 
1739
            "/clients/" + client_object_name)
764
1740
        DBusObjectWithProperties.__init__(self, self.bus,
765
1741
                                          self.dbus_object_path)
766
 
        
767
 
    def _get_approvals_pending(self):
768
 
        return self._approvals_pending
769
 
    def _set_approvals_pending(self, value):
770
 
        old_value = self._approvals_pending
771
 
        self._approvals_pending = value
772
 
        bval = bool(value)
773
 
        if (hasattr(self, "dbus_object_path")
774
 
            and bval is not bool(old_value)):
775
 
            dbus_bool = dbus.Boolean(bval, variant_level=1)
776
 
            self.PropertyChanged(dbus.String("ApprovalPending"),
777
 
                                 dbus_bool)
778
 
 
779
 
    approvals_pending = property(_get_approvals_pending,
780
 
                                 _set_approvals_pending)
781
 
    del _get_approvals_pending, _set_approvals_pending
782
 
    
783
 
    @staticmethod
784
 
    def _datetime_to_dbus(dt, variant_level=0):
785
 
        """Convert a UTC datetime.datetime() to a D-Bus type."""
786
 
        return dbus.String(dt.isoformat(),
787
 
                           variant_level=variant_level)
788
 
    
789
 
    def enable(self):
790
 
        oldstate = getattr(self, "enabled", False)
791
 
        r = Client.enable(self)
792
 
        if oldstate != self.enabled:
793
 
            # Emit D-Bus signals
794
 
            self.PropertyChanged(dbus.String("Enabled"),
795
 
                                 dbus.Boolean(True, variant_level=1))
796
 
            self.PropertyChanged(
797
 
                dbus.String("LastEnabled"),
798
 
                self._datetime_to_dbus(self.last_enabled,
799
 
                                       variant_level=1))
800
 
        return r
801
 
    
802
 
    def disable(self, quiet = False):
803
 
        oldstate = getattr(self, "enabled", False)
804
 
        r = Client.disable(self, quiet=quiet)
805
 
        if not quiet and oldstate != self.enabled:
806
 
            # Emit D-Bus signal
807
 
            self.PropertyChanged(dbus.String("Enabled"),
808
 
                                 dbus.Boolean(False, variant_level=1))
809
 
        return r
810
 
    
 
1742
 
 
1743
    def notifychangeproperty(transform_func, dbus_name,
 
1744
                             type_func=lambda x: x,
 
1745
                             variant_level=1,
 
1746
                             invalidate_only=False,
 
1747
                             _interface=_interface):
 
1748
        """ Modify a variable so that it's a property which announces
 
1749
        its changes to DBus.
 
1750
 
 
1751
        transform_fun: Function that takes a value and a variant_level
 
1752
                       and transforms it to a D-Bus type.
 
1753
        dbus_name: D-Bus name of the variable
 
1754
        type_func: Function that transform the value before sending it
 
1755
                   to the D-Bus.  Default: no transform
 
1756
        variant_level: D-Bus variant level.  Default: 1
 
1757
        """
 
1758
        attrname = "_{}".format(dbus_name)
 
1759
 
 
1760
        def setter(self, value):
 
1761
            if hasattr(self, "dbus_object_path"):
 
1762
                if (not hasattr(self, attrname) or
 
1763
                    type_func(getattr(self, attrname, None))
 
1764
                    != type_func(value)):
 
1765
                    if invalidate_only:
 
1766
                        self.PropertiesChanged(
 
1767
                            _interface, dbus.Dictionary(),
 
1768
                            dbus.Array((dbus_name, )))
 
1769
                    else:
 
1770
                        dbus_value = transform_func(
 
1771
                            type_func(value),
 
1772
                            variant_level=variant_level)
 
1773
                        self.PropertyChanged(dbus.String(dbus_name),
 
1774
                                             dbus_value)
 
1775
                        self.PropertiesChanged(
 
1776
                            _interface,
 
1777
                            dbus.Dictionary({dbus.String(dbus_name):
 
1778
                                             dbus_value}),
 
1779
                            dbus.Array())
 
1780
            setattr(self, attrname, value)
 
1781
 
 
1782
        return property(lambda self: getattr(self, attrname), setter)
 
1783
 
 
1784
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
 
1785
    approvals_pending = notifychangeproperty(dbus.Boolean,
 
1786
                                             "ApprovalPending",
 
1787
                                             type_func=bool)
 
1788
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
 
1789
    last_enabled = notifychangeproperty(datetime_to_dbus,
 
1790
                                        "LastEnabled")
 
1791
    checker = notifychangeproperty(
 
1792
        dbus.Boolean, "CheckerRunning",
 
1793
        type_func=lambda checker: checker is not None)
 
1794
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
 
1795
                                           "LastCheckedOK")
 
1796
    last_checker_status = notifychangeproperty(dbus.Int16,
 
1797
                                               "LastCheckerStatus")
 
1798
    last_approval_request = notifychangeproperty(
 
1799
        datetime_to_dbus, "LastApprovalRequest")
 
1800
    approved_by_default = notifychangeproperty(dbus.Boolean,
 
1801
                                               "ApprovedByDefault")
 
1802
    approval_delay = notifychangeproperty(
 
1803
        dbus.UInt64, "ApprovalDelay",
 
1804
        type_func=lambda td: td.total_seconds() * 1000)
 
1805
    approval_duration = notifychangeproperty(
 
1806
        dbus.UInt64, "ApprovalDuration",
 
1807
        type_func=lambda td: td.total_seconds() * 1000)
 
1808
    host = notifychangeproperty(dbus.String, "Host")
 
1809
    timeout = notifychangeproperty(
 
1810
        dbus.UInt64, "Timeout",
 
1811
        type_func=lambda td: td.total_seconds() * 1000)
 
1812
    extended_timeout = notifychangeproperty(
 
1813
        dbus.UInt64, "ExtendedTimeout",
 
1814
        type_func=lambda td: td.total_seconds() * 1000)
 
1815
    interval = notifychangeproperty(
 
1816
        dbus.UInt64, "Interval",
 
1817
        type_func=lambda td: td.total_seconds() * 1000)
 
1818
    checker_command = notifychangeproperty(dbus.String, "Checker")
 
1819
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
 
1820
                                  invalidate_only=True)
 
1821
 
 
1822
    del notifychangeproperty
 
1823
 
811
1824
    def __del__(self, *args, **kwargs):
812
1825
        try:
813
1826
            self.remove_from_connection()
816
1829
        if hasattr(DBusObjectWithProperties, "__del__"):
817
1830
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
818
1831
        Client.__del__(self, *args, **kwargs)
819
 
    
820
 
    def checker_callback(self, pid, condition, command,
821
 
                         *args, **kwargs):
822
 
        self.checker_callback_tag = None
823
 
        self.checker = None
824
 
        # Emit D-Bus signal
825
 
        self.PropertyChanged(dbus.String("CheckerRunning"),
826
 
                             dbus.Boolean(False, variant_level=1))
827
 
        if os.WIFEXITED(condition):
828
 
            exitstatus = os.WEXITSTATUS(condition)
 
1832
 
 
1833
    def checker_callback(self, source, condition,
 
1834
                         connection, command, *args, **kwargs):
 
1835
        ret = Client.checker_callback(self, source, condition,
 
1836
                                      connection, command, *args,
 
1837
                                      **kwargs)
 
1838
        exitstatus = self.last_checker_status
 
1839
        if exitstatus >= 0:
829
1840
            # Emit D-Bus signal
830
1841
            self.CheckerCompleted(dbus.Int16(exitstatus),
831
 
                                  dbus.Int64(condition),
 
1842
                                  # This is specific to GNU libC
 
1843
                                  dbus.Int64(exitstatus << 8),
832
1844
                                  dbus.String(command))
833
1845
        else:
834
1846
            # Emit D-Bus signal
835
1847
            self.CheckerCompleted(dbus.Int16(-1),
836
 
                                  dbus.Int64(condition),
 
1848
                                  dbus.Int64(
 
1849
                                      # This is specific to GNU libC
 
1850
                                      (exitstatus << 8)
 
1851
                                      | self.last_checker_signal),
837
1852
                                  dbus.String(command))
838
 
        
839
 
        return Client.checker_callback(self, pid, condition, command,
840
 
                                       *args, **kwargs)
841
 
    
842
 
    def checked_ok(self, *args, **kwargs):
843
 
        Client.checked_ok(self, *args, **kwargs)
844
 
        # Emit D-Bus signal
845
 
        self.PropertyChanged(
846
 
            dbus.String("LastCheckedOK"),
847
 
            (self._datetime_to_dbus(self.last_checked_ok,
848
 
                                    variant_level=1)))
849
 
    
850
 
    def need_approval(self, *args, **kwargs):
851
 
        r = Client.need_approval(self, *args, **kwargs)
852
 
        # Emit D-Bus signal
853
 
        self.PropertyChanged(
854
 
            dbus.String("LastApprovalRequest"),
855
 
            (self._datetime_to_dbus(self.last_approval_request,
856
 
                                    variant_level=1)))
857
 
        return r
858
 
    
 
1853
        return ret
 
1854
 
859
1855
    def start_checker(self, *args, **kwargs):
860
 
        old_checker = self.checker
861
 
        if self.checker is not None:
862
 
            old_checker_pid = self.checker.pid
863
 
        else:
864
 
            old_checker_pid = None
 
1856
        old_checker_pid = getattr(self.checker, "pid", None)
865
1857
        r = Client.start_checker(self, *args, **kwargs)
866
1858
        # Only if new checker process was started
867
1859
        if (self.checker is not None
868
1860
            and old_checker_pid != self.checker.pid):
869
1861
            # Emit D-Bus signal
870
1862
            self.CheckerStarted(self.current_checker_command)
871
 
            self.PropertyChanged(
872
 
                dbus.String("CheckerRunning"),
873
 
                dbus.Boolean(True, variant_level=1))
874
 
        return r
875
 
    
876
 
    def stop_checker(self, *args, **kwargs):
877
 
        old_checker = getattr(self, "checker", None)
878
 
        r = Client.stop_checker(self, *args, **kwargs)
879
 
        if (old_checker is not None
880
 
            and getattr(self, "checker", None) is None):
881
 
            self.PropertyChanged(dbus.String("CheckerRunning"),
882
 
                                 dbus.Boolean(False, variant_level=1))
883
1863
        return r
884
1864
 
885
1865
    def _reset_approved(self):
886
 
        self._approved = None
 
1866
        self.approved = None
887
1867
        return False
888
 
    
 
1868
 
889
1869
    def approve(self, value=True):
 
1870
        self.approved = value
 
1871
        GLib.timeout_add(int(self.approval_duration.total_seconds()
 
1872
                             * 1000), self._reset_approved)
890
1873
        self.send_changedstate()
891
 
        self._approved = value
892
 
        gobject.timeout_add(self._timedelta_to_milliseconds
893
 
                            (self.approval_duration),
894
 
                            self._reset_approved)
895
 
    
896
 
    
897
 
    ## D-Bus methods, signals & properties
898
 
    _interface = "se.bsnet.fukt.Mandos.Client"
899
 
    
900
 
    ## Signals
901
 
    
 
1874
 
 
1875
    #  D-Bus methods, signals & properties
 
1876
 
 
1877
    #  Interfaces
 
1878
 
 
1879
    #  Signals
 
1880
 
902
1881
    # CheckerCompleted - signal
903
1882
    @dbus.service.signal(_interface, signature="nxs")
904
1883
    def CheckerCompleted(self, exitcode, waitstatus, command):
905
1884
        "D-Bus signal"
906
1885
        pass
907
 
    
 
1886
 
908
1887
    # CheckerStarted - signal
909
1888
    @dbus.service.signal(_interface, signature="s")
910
1889
    def CheckerStarted(self, command):
911
1890
        "D-Bus signal"
912
1891
        pass
913
 
    
 
1892
 
914
1893
    # PropertyChanged - signal
 
1894
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
915
1895
    @dbus.service.signal(_interface, signature="sv")
916
1896
    def PropertyChanged(self, property, value):
917
1897
        "D-Bus signal"
918
1898
        pass
919
 
    
 
1899
 
920
1900
    # GotSecret - signal
921
1901
    @dbus.service.signal(_interface)
922
1902
    def GotSecret(self):
925
1905
        server to mandos-client
926
1906
        """
927
1907
        pass
928
 
    
 
1908
 
929
1909
    # Rejected - signal
930
1910
    @dbus.service.signal(_interface, signature="s")
931
1911
    def Rejected(self, reason):
932
1912
        "D-Bus signal"
933
1913
        pass
934
 
    
 
1914
 
935
1915
    # NeedApproval - signal
936
1916
    @dbus.service.signal(_interface, signature="tb")
937
1917
    def NeedApproval(self, timeout, default):
938
1918
        "D-Bus signal"
939
1919
        return self.need_approval()
940
 
    
941
 
    ## Methods
942
 
    
 
1920
 
 
1921
    #  Methods
 
1922
 
943
1923
    # Approve - method
944
1924
    @dbus.service.method(_interface, in_signature="b")
945
1925
    def Approve(self, value):
946
1926
        self.approve(value)
947
 
    
 
1927
 
948
1928
    # CheckedOK - method
949
1929
    @dbus.service.method(_interface)
950
1930
    def CheckedOK(self):
951
1931
        self.checked_ok()
952
 
    
 
1932
 
953
1933
    # Enable - method
 
1934
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
954
1935
    @dbus.service.method(_interface)
955
1936
    def Enable(self):
956
1937
        "D-Bus method"
957
1938
        self.enable()
958
 
    
 
1939
 
959
1940
    # StartChecker - method
 
1941
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
960
1942
    @dbus.service.method(_interface)
961
1943
    def StartChecker(self):
962
1944
        "D-Bus method"
963
1945
        self.start_checker()
964
 
    
 
1946
 
965
1947
    # Disable - method
 
1948
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
966
1949
    @dbus.service.method(_interface)
967
1950
    def Disable(self):
968
1951
        "D-Bus method"
969
1952
        self.disable()
970
 
    
 
1953
 
971
1954
    # StopChecker - method
 
1955
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
972
1956
    @dbus.service.method(_interface)
973
1957
    def StopChecker(self):
974
1958
        self.stop_checker()
975
 
    
976
 
    ## Properties
977
 
    
 
1959
 
 
1960
    #  Properties
 
1961
 
978
1962
    # ApprovalPending - property
979
1963
    @dbus_service_property(_interface, signature="b", access="read")
980
1964
    def ApprovalPending_dbus_property(self):
981
1965
        return dbus.Boolean(bool(self.approvals_pending))
982
 
    
 
1966
 
983
1967
    # ApprovedByDefault - property
984
 
    @dbus_service_property(_interface, signature="b",
 
1968
    @dbus_service_property(_interface,
 
1969
                           signature="b",
985
1970
                           access="readwrite")
986
1971
    def ApprovedByDefault_dbus_property(self, value=None):
987
1972
        if value is None:       # get
988
1973
            return dbus.Boolean(self.approved_by_default)
989
1974
        self.approved_by_default = bool(value)
990
 
        # Emit D-Bus signal
991
 
        self.PropertyChanged(dbus.String("ApprovedByDefault"),
992
 
                             dbus.Boolean(value, variant_level=1))
993
 
    
 
1975
 
994
1976
    # ApprovalDelay - property
995
 
    @dbus_service_property(_interface, signature="t",
 
1977
    @dbus_service_property(_interface,
 
1978
                           signature="t",
996
1979
                           access="readwrite")
997
1980
    def ApprovalDelay_dbus_property(self, value=None):
998
1981
        if value is None:       # get
999
 
            return dbus.UInt64(self.approval_delay_milliseconds())
 
1982
            return dbus.UInt64(self.approval_delay.total_seconds()
 
1983
                               * 1000)
1000
1984
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1001
 
        # Emit D-Bus signal
1002
 
        self.PropertyChanged(dbus.String("ApprovalDelay"),
1003
 
                             dbus.UInt64(value, variant_level=1))
1004
 
    
 
1985
 
1005
1986
    # ApprovalDuration - property
1006
 
    @dbus_service_property(_interface, signature="t",
 
1987
    @dbus_service_property(_interface,
 
1988
                           signature="t",
1007
1989
                           access="readwrite")
1008
1990
    def ApprovalDuration_dbus_property(self, value=None):
1009
1991
        if value is None:       # get
1010
 
            return dbus.UInt64(self._timedelta_to_milliseconds(
1011
 
                    self.approval_duration))
 
1992
            return dbus.UInt64(self.approval_duration.total_seconds()
 
1993
                               * 1000)
1012
1994
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1013
 
        # Emit D-Bus signal
1014
 
        self.PropertyChanged(dbus.String("ApprovalDuration"),
1015
 
                             dbus.UInt64(value, variant_level=1))
1016
 
    
 
1995
 
1017
1996
    # Name - property
 
1997
    @dbus_annotations(
 
1998
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1018
1999
    @dbus_service_property(_interface, signature="s", access="read")
1019
2000
    def Name_dbus_property(self):
1020
2001
        return dbus.String(self.name)
1021
 
    
 
2002
 
1022
2003
    # Fingerprint - property
 
2004
    @dbus_annotations(
 
2005
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1023
2006
    @dbus_service_property(_interface, signature="s", access="read")
1024
2007
    def Fingerprint_dbus_property(self):
1025
2008
        return dbus.String(self.fingerprint)
1026
 
    
 
2009
 
1027
2010
    # Host - property
1028
 
    @dbus_service_property(_interface, signature="s",
 
2011
    @dbus_service_property(_interface,
 
2012
                           signature="s",
1029
2013
                           access="readwrite")
1030
2014
    def Host_dbus_property(self, value=None):
1031
2015
        if value is None:       # get
1032
2016
            return dbus.String(self.host)
1033
 
        self.host = value
1034
 
        # Emit D-Bus signal
1035
 
        self.PropertyChanged(dbus.String("Host"),
1036
 
                             dbus.String(value, variant_level=1))
1037
 
    
 
2017
        self.host = str(value)
 
2018
 
1038
2019
    # Created - property
 
2020
    @dbus_annotations(
 
2021
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1039
2022
    @dbus_service_property(_interface, signature="s", access="read")
1040
2023
    def Created_dbus_property(self):
1041
 
        return dbus.String(self._datetime_to_dbus(self.created))
1042
 
    
 
2024
        return datetime_to_dbus(self.created)
 
2025
 
1043
2026
    # LastEnabled - property
1044
2027
    @dbus_service_property(_interface, signature="s", access="read")
1045
2028
    def LastEnabled_dbus_property(self):
1046
 
        if self.last_enabled is None:
1047
 
            return dbus.String("")
1048
 
        return dbus.String(self._datetime_to_dbus(self.last_enabled))
1049
 
    
 
2029
        return datetime_to_dbus(self.last_enabled)
 
2030
 
1050
2031
    # Enabled - property
1051
 
    @dbus_service_property(_interface, signature="b",
 
2032
    @dbus_service_property(_interface,
 
2033
                           signature="b",
1052
2034
                           access="readwrite")
1053
2035
    def Enabled_dbus_property(self, value=None):
1054
2036
        if value is None:       # get
1057
2039
            self.enable()
1058
2040
        else:
1059
2041
            self.disable()
1060
 
    
 
2042
 
1061
2043
    # LastCheckedOK - property
1062
 
    @dbus_service_property(_interface, signature="s",
 
2044
    @dbus_service_property(_interface,
 
2045
                           signature="s",
1063
2046
                           access="readwrite")
1064
2047
    def LastCheckedOK_dbus_property(self, value=None):
1065
2048
        if value is not None:
1066
2049
            self.checked_ok()
1067
2050
            return
1068
 
        if self.last_checked_ok is None:
1069
 
            return dbus.String("")
1070
 
        return dbus.String(self._datetime_to_dbus(self
1071
 
                                                  .last_checked_ok))
1072
 
    
 
2051
        return datetime_to_dbus(self.last_checked_ok)
 
2052
 
 
2053
    # LastCheckerStatus - property
 
2054
    @dbus_service_property(_interface, signature="n", access="read")
 
2055
    def LastCheckerStatus_dbus_property(self):
 
2056
        return dbus.Int16(self.last_checker_status)
 
2057
 
 
2058
    # Expires - property
 
2059
    @dbus_service_property(_interface, signature="s", access="read")
 
2060
    def Expires_dbus_property(self):
 
2061
        return datetime_to_dbus(self.expires)
 
2062
 
1073
2063
    # LastApprovalRequest - property
1074
2064
    @dbus_service_property(_interface, signature="s", access="read")
1075
2065
    def LastApprovalRequest_dbus_property(self):
1076
 
        if self.last_approval_request is None:
1077
 
            return dbus.String("")
1078
 
        return dbus.String(self.
1079
 
                           _datetime_to_dbus(self
1080
 
                                             .last_approval_request))
1081
 
    
 
2066
        return datetime_to_dbus(self.last_approval_request)
 
2067
 
1082
2068
    # Timeout - property
1083
 
    @dbus_service_property(_interface, signature="t",
 
2069
    @dbus_service_property(_interface,
 
2070
                           signature="t",
1084
2071
                           access="readwrite")
1085
2072
    def Timeout_dbus_property(self, value=None):
1086
2073
        if value is None:       # get
1087
 
            return dbus.UInt64(self.timeout_milliseconds())
 
2074
            return dbus.UInt64(self.timeout.total_seconds() * 1000)
 
2075
        old_timeout = self.timeout
1088
2076
        self.timeout = datetime.timedelta(0, 0, 0, value)
1089
 
        # Emit D-Bus signal
1090
 
        self.PropertyChanged(dbus.String("Timeout"),
1091
 
                             dbus.UInt64(value, variant_level=1))
1092
 
        if getattr(self, "disable_initiator_tag", None) is None:
1093
 
            return
1094
 
        # Reschedule timeout
1095
 
        gobject.source_remove(self.disable_initiator_tag)
1096
 
        self.disable_initiator_tag = None
1097
 
        time_to_die = (self.
1098
 
                       _timedelta_to_milliseconds((self
1099
 
                                                   .last_checked_ok
1100
 
                                                   + self.timeout)
1101
 
                                                  - datetime.datetime
1102
 
                                                  .utcnow()))
1103
 
        if time_to_die <= 0:
1104
 
            # The timeout has passed
1105
 
            self.disable()
1106
 
        else:
1107
 
            self.disable_initiator_tag = (gobject.timeout_add
1108
 
                                          (time_to_die, self.disable))
1109
 
    
 
2077
        # Reschedule disabling
 
2078
        if self.enabled:
 
2079
            now = datetime.datetime.utcnow()
 
2080
            self.expires += self.timeout - old_timeout
 
2081
            if self.expires <= now:
 
2082
                # The timeout has passed
 
2083
                self.disable()
 
2084
            else:
 
2085
                if (getattr(self, "disable_initiator_tag", None)
 
2086
                    is None):
 
2087
                    return
 
2088
                GLib.source_remove(self.disable_initiator_tag)
 
2089
                self.disable_initiator_tag = GLib.timeout_add(
 
2090
                    int((self.expires - now).total_seconds() * 1000),
 
2091
                    self.disable)
 
2092
 
 
2093
    # ExtendedTimeout - property
 
2094
    @dbus_service_property(_interface,
 
2095
                           signature="t",
 
2096
                           access="readwrite")
 
2097
    def ExtendedTimeout_dbus_property(self, value=None):
 
2098
        if value is None:       # get
 
2099
            return dbus.UInt64(self.extended_timeout.total_seconds()
 
2100
                               * 1000)
 
2101
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
 
2102
 
1110
2103
    # Interval - property
1111
 
    @dbus_service_property(_interface, signature="t",
 
2104
    @dbus_service_property(_interface,
 
2105
                           signature="t",
1112
2106
                           access="readwrite")
1113
2107
    def Interval_dbus_property(self, value=None):
1114
2108
        if value is None:       # get
1115
 
            return dbus.UInt64(self.interval_milliseconds())
 
2109
            return dbus.UInt64(self.interval.total_seconds() * 1000)
1116
2110
        self.interval = datetime.timedelta(0, 0, 0, value)
1117
 
        # Emit D-Bus signal
1118
 
        self.PropertyChanged(dbus.String("Interval"),
1119
 
                             dbus.UInt64(value, variant_level=1))
1120
2111
        if getattr(self, "checker_initiator_tag", None) is None:
1121
2112
            return
1122
 
        # Reschedule checker run
1123
 
        gobject.source_remove(self.checker_initiator_tag)
1124
 
        self.checker_initiator_tag = (gobject.timeout_add
1125
 
                                      (value, self.start_checker))
1126
 
        self.start_checker()    # Start one now, too
 
2113
        if self.enabled:
 
2114
            # Reschedule checker run
 
2115
            GLib.source_remove(self.checker_initiator_tag)
 
2116
            self.checker_initiator_tag = GLib.timeout_add(
 
2117
                value, self.start_checker)
 
2118
            self.start_checker()  # Start one now, too
1127
2119
 
1128
2120
    # Checker - property
1129
 
    @dbus_service_property(_interface, signature="s",
 
2121
    @dbus_service_property(_interface,
 
2122
                           signature="s",
1130
2123
                           access="readwrite")
1131
2124
    def Checker_dbus_property(self, value=None):
1132
2125
        if value is None:       # get
1133
2126
            return dbus.String(self.checker_command)
1134
 
        self.checker_command = value
1135
 
        # Emit D-Bus signal
1136
 
        self.PropertyChanged(dbus.String("Checker"),
1137
 
                             dbus.String(self.checker_command,
1138
 
                                         variant_level=1))
1139
 
    
 
2127
        self.checker_command = str(value)
 
2128
 
1140
2129
    # CheckerRunning - property
1141
 
    @dbus_service_property(_interface, signature="b",
 
2130
    @dbus_service_property(_interface,
 
2131
                           signature="b",
1142
2132
                           access="readwrite")
1143
2133
    def CheckerRunning_dbus_property(self, value=None):
1144
2134
        if value is None:       # get
1147
2137
            self.start_checker()
1148
2138
        else:
1149
2139
            self.stop_checker()
1150
 
    
 
2140
 
1151
2141
    # ObjectPath - property
 
2142
    @dbus_annotations(
 
2143
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
 
2144
         "org.freedesktop.DBus.Deprecated": "true"})
1152
2145
    @dbus_service_property(_interface, signature="o", access="read")
1153
2146
    def ObjectPath_dbus_property(self):
1154
 
        return self.dbus_object_path # is already a dbus.ObjectPath
1155
 
    
 
2147
        return self.dbus_object_path  # is already a dbus.ObjectPath
 
2148
 
1156
2149
    # Secret = property
1157
 
    @dbus_service_property(_interface, signature="ay",
1158
 
                           access="write", byte_arrays=True)
 
2150
    @dbus_annotations(
 
2151
        {"org.freedesktop.DBus.Property.EmitsChangedSignal":
 
2152
         "invalidates"})
 
2153
    @dbus_service_property(_interface,
 
2154
                           signature="ay",
 
2155
                           access="write",
 
2156
                           byte_arrays=True)
1159
2157
    def Secret_dbus_property(self, value):
1160
 
        self.secret = str(value)
1161
 
    
 
2158
        self.secret = bytes(value)
 
2159
 
1162
2160
    del _interface
1163
2161
 
1164
2162
 
1167
2165
        self._pipe = child_pipe
1168
2166
        self._pipe.send(('init', fpr, address))
1169
2167
        if not self._pipe.recv():
1170
 
            raise KeyError()
 
2168
            raise KeyError(fpr)
1171
2169
 
1172
2170
    def __getattribute__(self, name):
1173
 
        if(name == '_pipe'):
 
2171
        if name == '_pipe':
1174
2172
            return super(ProxyClient, self).__getattribute__(name)
1175
2173
        self._pipe.send(('getattr', name))
1176
2174
        data = self._pipe.recv()
1177
2175
        if data[0] == 'data':
1178
2176
            return data[1]
1179
2177
        if data[0] == 'function':
 
2178
 
1180
2179
            def func(*args, **kwargs):
1181
2180
                self._pipe.send(('funcall', name, args, kwargs))
1182
2181
                return self._pipe.recv()[1]
 
2182
 
1183
2183
            return func
1184
2184
 
1185
2185
    def __setattr__(self, name, value):
1186
 
        if(name == '_pipe'):
 
2186
        if name == '_pipe':
1187
2187
            return super(ProxyClient, self).__setattr__(name, value)
1188
2188
        self._pipe.send(('setattr', name, value))
1189
2189
 
1190
2190
 
1191
2191
class ClientHandler(socketserver.BaseRequestHandler, object):
1192
2192
    """A class to handle client connections.
1193
 
    
 
2193
 
1194
2194
    Instantiated once for each connection to handle it.
1195
2195
    Note: This will run in its own forked process."""
1196
 
    
 
2196
 
1197
2197
    def handle(self):
1198
2198
        with contextlib.closing(self.server.child_pipe) as child_pipe:
1199
2199
            logger.info("TCP connection from: %s",
1200
 
                        unicode(self.client_address))
 
2200
                        str(self.client_address))
1201
2201
            logger.debug("Pipe FD: %d",
1202
2202
                         self.server.child_pipe.fileno())
1203
2203
 
1204
 
            session = (gnutls.connection
1205
 
                       .ClientSession(self.request,
1206
 
                                      gnutls.connection
1207
 
                                      .X509Credentials()))
1208
 
 
1209
 
            # Note: gnutls.connection.X509Credentials is really a
1210
 
            # generic GnuTLS certificate credentials object so long as
1211
 
            # no X.509 keys are added to it.  Therefore, we can use it
1212
 
            # here despite using OpenPGP certificates.
1213
 
 
1214
 
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
1215
 
            #                      "+AES-256-CBC", "+SHA1",
1216
 
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
1217
 
            #                      "+DHE-DSS"))
 
2204
            session = gnutls.ClientSession(self.request)
 
2205
 
 
2206
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
2207
            #                       "+AES-256-CBC", "+SHA1",
 
2208
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
 
2209
            #                       "+DHE-DSS"))
1218
2210
            # Use a fallback default, since this MUST be set.
1219
2211
            priority = self.server.gnutls_priority
1220
2212
            if priority is None:
1221
2213
                priority = "NORMAL"
1222
 
            (gnutls.library.functions
1223
 
             .gnutls_priority_set_direct(session._c_object,
1224
 
                                         priority, None))
 
2214
            gnutls.priority_set_direct(session._c_object,
 
2215
                                       priority.encode("utf-8"),
 
2216
                                       None)
1225
2217
 
1226
2218
            # Start communication using the Mandos protocol
1227
2219
            # Get protocol number
1229
2221
            logger.debug("Protocol version: %r", line)
1230
2222
            try:
1231
2223
                if int(line.strip().split()[0]) > 1:
1232
 
                    raise RuntimeError
 
2224
                    raise RuntimeError(line)
1233
2225
            except (ValueError, IndexError, RuntimeError) as error:
1234
2226
                logger.error("Unknown protocol version: %s", error)
1235
2227
                return
1237
2229
            # Start GnuTLS connection
1238
2230
            try:
1239
2231
                session.handshake()
1240
 
            except gnutls.errors.GNUTLSError as error:
 
2232
            except gnutls.Error as error:
1241
2233
                logger.warning("Handshake failed: %s", error)
1242
2234
                # Do not run session.bye() here: the session is not
1243
2235
                # established.  Just abandon the request.
1247
2239
            approval_required = False
1248
2240
            try:
1249
2241
                try:
1250
 
                    fpr = self.fingerprint(self.peer_certificate
1251
 
                                           (session))
1252
 
                except (TypeError,
1253
 
                        gnutls.errors.GNUTLSError) as error:
 
2242
                    fpr = self.fingerprint(
 
2243
                        self.peer_certificate(session))
 
2244
                except (TypeError, gnutls.Error) as error:
1254
2245
                    logger.warning("Bad certificate: %s", error)
1255
2246
                    return
1256
2247
                logger.debug("Fingerprint: %s", fpr)
1260
2251
                                         self.client_address)
1261
2252
                except KeyError:
1262
2253
                    return
1263
 
                
 
2254
 
1264
2255
                if client.approval_delay:
1265
2256
                    delay = client.approval_delay
1266
2257
                    client.approvals_pending += 1
1267
2258
                    approval_required = True
1268
 
                
 
2259
 
1269
2260
                while True:
1270
2261
                    if not client.enabled:
1271
2262
                        logger.info("Client %s is disabled",
1272
 
                                       client.name)
 
2263
                                    client.name)
1273
2264
                        if self.server.use_dbus:
1274
2265
                            # Emit D-Bus signal
1275
 
                            client.Rejected("Disabled")                    
 
2266
                            client.Rejected("Disabled")
1276
2267
                        return
1277
 
                    
1278
 
                    if client._approved or not client.approval_delay:
1279
 
                        #We are approved or approval is disabled
 
2268
 
 
2269
                    if client.approved or not client.approval_delay:
 
2270
                        # We are approved or approval is disabled
1280
2271
                        break
1281
 
                    elif client._approved is None:
 
2272
                    elif client.approved is None:
1282
2273
                        logger.info("Client %s needs approval",
1283
2274
                                    client.name)
1284
2275
                        if self.server.use_dbus:
1285
2276
                            # Emit D-Bus signal
1286
2277
                            client.NeedApproval(
1287
 
                                client.approval_delay_milliseconds(),
1288
 
                                client.approved_by_default)
 
2278
                                client.approval_delay.total_seconds()
 
2279
                                * 1000, client.approved_by_default)
1289
2280
                    else:
1290
2281
                        logger.warning("Client %s was not approved",
1291
2282
                                       client.name)
1293
2284
                            # Emit D-Bus signal
1294
2285
                            client.Rejected("Denied")
1295
2286
                        return
1296
 
                    
1297
 
                    #wait until timeout or approved
1298
 
                    #x = float(client._timedelta_to_milliseconds(delay))
 
2287
 
 
2288
                    # wait until timeout or approved
1299
2289
                    time = datetime.datetime.now()
1300
2290
                    client.changedstate.acquire()
1301
 
                    client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))
 
2291
                    client.changedstate.wait(delay.total_seconds())
1302
2292
                    client.changedstate.release()
1303
2293
                    time2 = datetime.datetime.now()
1304
2294
                    if (time2 - time) >= delay:
1314
2304
                            break
1315
2305
                    else:
1316
2306
                        delay -= time2 - time
1317
 
                
1318
 
                sent_size = 0
1319
 
                while sent_size < len(client.secret):
1320
 
                    try:
1321
 
                        sent = session.send(client.secret[sent_size:])
1322
 
                    except gnutls.errors.GNUTLSError as error:
1323
 
                        logger.warning("gnutls send failed")
1324
 
                        return
1325
 
                    logger.debug("Sent: %d, remaining: %d",
1326
 
                                 sent, len(client.secret)
1327
 
                                 - (sent_size + sent))
1328
 
                    sent_size += sent
 
2307
 
 
2308
                try:
 
2309
                    session.send(client.secret)
 
2310
                except gnutls.Error as error:
 
2311
                    logger.warning("gnutls send failed",
 
2312
                                   exc_info=error)
 
2313
                    return
1329
2314
 
1330
2315
                logger.info("Sending secret to %s", client.name)
1331
 
                # bump the timeout as if seen
1332
 
                client.checked_ok()
 
2316
                # bump the timeout using extended_timeout
 
2317
                client.bump_timeout(client.extended_timeout)
1333
2318
                if self.server.use_dbus:
1334
2319
                    # Emit D-Bus signal
1335
2320
                    client.GotSecret()
1336
 
            
 
2321
 
1337
2322
            finally:
1338
2323
                if approval_required:
1339
2324
                    client.approvals_pending -= 1
1340
2325
                try:
1341
2326
                    session.bye()
1342
 
                except gnutls.errors.GNUTLSError as error:
1343
 
                    logger.warning("GnuTLS bye failed")
1344
 
    
 
2327
                except gnutls.Error as error:
 
2328
                    logger.warning("GnuTLS bye failed",
 
2329
                                   exc_info=error)
 
2330
 
1345
2331
    @staticmethod
1346
2332
    def peer_certificate(session):
1347
2333
        "Return the peer's OpenPGP certificate as a bytestring"
1348
2334
        # If not an OpenPGP certificate...
1349
 
        if (gnutls.library.functions
1350
 
            .gnutls_certificate_type_get(session._c_object)
1351
 
            != gnutls.library.constants.GNUTLS_CRT_OPENPGP):
1352
 
            # ...do the normal thing
1353
 
            return session.peer_certificate
 
2335
        if (gnutls.certificate_type_get(session._c_object)
 
2336
            != gnutls.CRT_OPENPGP):
 
2337
            # ...return invalid data
 
2338
            return b""
1354
2339
        list_size = ctypes.c_uint(1)
1355
 
        cert_list = (gnutls.library.functions
1356
 
                     .gnutls_certificate_get_peers
 
2340
        cert_list = (gnutls.certificate_get_peers
1357
2341
                     (session._c_object, ctypes.byref(list_size)))
1358
2342
        if not bool(cert_list) and list_size.value != 0:
1359
 
            raise gnutls.errors.GNUTLSError("error getting peer"
1360
 
                                            " certificate")
 
2343
            raise gnutls.Error("error getting peer certificate")
1361
2344
        if list_size.value == 0:
1362
2345
            return None
1363
2346
        cert = cert_list[0]
1364
2347
        return ctypes.string_at(cert.data, cert.size)
1365
 
    
 
2348
 
1366
2349
    @staticmethod
1367
2350
    def fingerprint(openpgp):
1368
2351
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
1369
2352
        # New GnuTLS "datum" with the OpenPGP public key
1370
 
        datum = (gnutls.library.types
1371
 
                 .gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),
1372
 
                                             ctypes.POINTER
1373
 
                                             (ctypes.c_ubyte)),
1374
 
                                 ctypes.c_uint(len(openpgp))))
 
2353
        datum = gnutls.datum_t(
 
2354
            ctypes.cast(ctypes.c_char_p(openpgp),
 
2355
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2356
            ctypes.c_uint(len(openpgp)))
1375
2357
        # New empty GnuTLS certificate
1376
 
        crt = gnutls.library.types.gnutls_openpgp_crt_t()
1377
 
        (gnutls.library.functions
1378
 
         .gnutls_openpgp_crt_init(ctypes.byref(crt)))
 
2358
        crt = gnutls.openpgp_crt_t()
 
2359
        gnutls.openpgp_crt_init(ctypes.byref(crt))
1379
2360
        # Import the OpenPGP public key into the certificate
1380
 
        (gnutls.library.functions
1381
 
         .gnutls_openpgp_crt_import(crt, ctypes.byref(datum),
1382
 
                                    gnutls.library.constants
1383
 
                                    .GNUTLS_OPENPGP_FMT_RAW))
 
2361
        gnutls.openpgp_crt_import(crt, ctypes.byref(datum),
 
2362
                                  gnutls.OPENPGP_FMT_RAW)
1384
2363
        # Verify the self signature in the key
1385
2364
        crtverify = ctypes.c_uint()
1386
 
        (gnutls.library.functions
1387
 
         .gnutls_openpgp_crt_verify_self(crt, 0,
1388
 
                                         ctypes.byref(crtverify)))
 
2365
        gnutls.openpgp_crt_verify_self(crt, 0,
 
2366
                                       ctypes.byref(crtverify))
1389
2367
        if crtverify.value != 0:
1390
 
            gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
1391
 
            raise (gnutls.errors.CertificateSecurityError
1392
 
                   ("Verify failed"))
 
2368
            gnutls.openpgp_crt_deinit(crt)
 
2369
            raise gnutls.CertificateSecurityError("Verify failed")
1393
2370
        # New buffer for the fingerprint
1394
2371
        buf = ctypes.create_string_buffer(20)
1395
2372
        buf_len = ctypes.c_size_t()
1396
2373
        # Get the fingerprint from the certificate into the buffer
1397
 
        (gnutls.library.functions
1398
 
         .gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
1399
 
                                             ctypes.byref(buf_len)))
 
2374
        gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),
 
2375
                                           ctypes.byref(buf_len))
1400
2376
        # Deinit the certificate
1401
 
        gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)
 
2377
        gnutls.openpgp_crt_deinit(crt)
1402
2378
        # Convert the buffer to a Python bytestring
1403
2379
        fpr = ctypes.string_at(buf, buf_len.value)
1404
2380
        # Convert the bytestring to hexadecimal notation
1405
 
        hex_fpr = ''.join("%02X" % ord(char) for char in fpr)
 
2381
        hex_fpr = binascii.hexlify(fpr).upper()
1406
2382
        return hex_fpr
1407
2383
 
1408
2384
 
1409
2385
class MultiprocessingMixIn(object):
1410
2386
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
 
2387
 
1411
2388
    def sub_process_main(self, request, address):
1412
2389
        try:
1413
2390
            self.finish_request(request, address)
1414
 
        except:
 
2391
        except Exception:
1415
2392
            self.handle_error(request, address)
1416
2393
        self.close_request(request)
1417
 
            
 
2394
 
1418
2395
    def process_request(self, request, address):
1419
2396
        """Start a new process to process the request."""
1420
 
        multiprocessing.Process(target = self.sub_process_main,
1421
 
                                args = (request, address)).start()
 
2397
        proc = multiprocessing.Process(target=self.sub_process_main,
 
2398
                                       args=(request, address))
 
2399
        proc.start()
 
2400
        return proc
 
2401
 
1422
2402
 
1423
2403
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
1424
2404
    """ adds a pipe to the MixIn """
 
2405
 
1425
2406
    def process_request(self, request, client_address):
1426
2407
        """Overrides and wraps the original process_request().
1427
 
        
 
2408
 
1428
2409
        This function creates a new pipe in self.pipe
1429
2410
        """
1430
2411
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
1431
2412
 
1432
 
        super(MultiprocessingMixInWithPipe,
1433
 
              self).process_request(request, client_address)
 
2413
        proc = MultiprocessingMixIn.process_request(self, request,
 
2414
                                                    client_address)
1434
2415
        self.child_pipe.close()
1435
 
        self.add_pipe(parent_pipe)
 
2416
        self.add_pipe(parent_pipe, proc)
1436
2417
 
1437
 
    def add_pipe(self, parent_pipe):
 
2418
    def add_pipe(self, parent_pipe, proc):
1438
2419
        """Dummy function; override as necessary"""
1439
 
        raise NotImplementedError
 
2420
        raise NotImplementedError()
 
2421
 
1440
2422
 
1441
2423
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
1442
2424
                     socketserver.TCPServer, object):
1443
2425
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
1444
 
    
 
2426
 
1445
2427
    Attributes:
1446
2428
        enabled:        Boolean; whether this server is activated yet
1447
2429
        interface:      None or a network interface name (string)
1448
2430
        use_ipv6:       Boolean; to use IPv6 or not
1449
2431
    """
 
2432
 
1450
2433
    def __init__(self, server_address, RequestHandlerClass,
1451
 
                 interface=None, use_ipv6=True):
 
2434
                 interface=None,
 
2435
                 use_ipv6=True,
 
2436
                 socketfd=None):
 
2437
        """If socketfd is set, use that file descriptor instead of
 
2438
        creating a new one with socket.socket().
 
2439
        """
1452
2440
        self.interface = interface
1453
2441
        if use_ipv6:
1454
2442
            self.address_family = socket.AF_INET6
 
2443
        if socketfd is not None:
 
2444
            # Save the file descriptor
 
2445
            self.socketfd = socketfd
 
2446
            # Save the original socket.socket() function
 
2447
            self.socket_socket = socket.socket
 
2448
 
 
2449
            # To implement --socket, we monkey patch socket.socket.
 
2450
            #
 
2451
            # (When socketserver.TCPServer is a new-style class, we
 
2452
            # could make self.socket into a property instead of monkey
 
2453
            # patching socket.socket.)
 
2454
            #
 
2455
            # Create a one-time-only replacement for socket.socket()
 
2456
            @functools.wraps(socket.socket)
 
2457
            def socket_wrapper(*args, **kwargs):
 
2458
                # Restore original function so subsequent calls are
 
2459
                # not affected.
 
2460
                socket.socket = self.socket_socket
 
2461
                del self.socket_socket
 
2462
                # This time only, return a new socket object from the
 
2463
                # saved file descriptor.
 
2464
                return socket.fromfd(self.socketfd, *args, **kwargs)
 
2465
            # Replace socket.socket() function with wrapper
 
2466
            socket.socket = socket_wrapper
 
2467
        # The socketserver.TCPServer.__init__ will call
 
2468
        # socket.socket(), which might be our replacement,
 
2469
        # socket_wrapper(), if socketfd was set.
1455
2470
        socketserver.TCPServer.__init__(self, server_address,
1456
2471
                                        RequestHandlerClass)
 
2472
 
1457
2473
    def server_bind(self):
1458
2474
        """This overrides the normal server_bind() function
1459
2475
        to bind to an interface if one was specified, and also NOT to
1460
2476
        bind to an address or port if they were not specified."""
 
2477
        global SO_BINDTODEVICE
1461
2478
        if self.interface is not None:
1462
2479
            if SO_BINDTODEVICE is None:
1463
 
                logger.error("SO_BINDTODEVICE does not exist;"
1464
 
                             " cannot bind to interface %s",
1465
 
                             self.interface)
1466
 
            else:
1467
 
                try:
1468
 
                    self.socket.setsockopt(socket.SOL_SOCKET,
1469
 
                                           SO_BINDTODEVICE,
1470
 
                                           str(self.interface
1471
 
                                               + '\0'))
1472
 
                except socket.error as error:
1473
 
                    if error[0] == errno.EPERM:
1474
 
                        logger.error("No permission to"
1475
 
                                     " bind to interface %s",
1476
 
                                     self.interface)
1477
 
                    elif error[0] == errno.ENOPROTOOPT:
1478
 
                        logger.error("SO_BINDTODEVICE not available;"
1479
 
                                     " cannot bind to interface %s",
1480
 
                                     self.interface)
1481
 
                    else:
1482
 
                        raise
 
2480
                # Fall back to a hard-coded value which seems to be
 
2481
                # common enough.
 
2482
                logger.warning("SO_BINDTODEVICE not found, trying 25")
 
2483
                SO_BINDTODEVICE = 25
 
2484
            try:
 
2485
                self.socket.setsockopt(
 
2486
                    socket.SOL_SOCKET, SO_BINDTODEVICE,
 
2487
                    (self.interface + "\0").encode("utf-8"))
 
2488
            except socket.error as error:
 
2489
                if error.errno == errno.EPERM:
 
2490
                    logger.error("No permission to bind to"
 
2491
                                 " interface %s", self.interface)
 
2492
                elif error.errno == errno.ENOPROTOOPT:
 
2493
                    logger.error("SO_BINDTODEVICE not available;"
 
2494
                                 " cannot bind to interface %s",
 
2495
                                 self.interface)
 
2496
                elif error.errno == errno.ENODEV:
 
2497
                    logger.error("Interface %s does not exist,"
 
2498
                                 " cannot bind", self.interface)
 
2499
                else:
 
2500
                    raise
1483
2501
        # Only bind(2) the socket if we really need to.
1484
2502
        if self.server_address[0] or self.server_address[1]:
1485
2503
            if not self.server_address[0]:
1486
2504
                if self.address_family == socket.AF_INET6:
1487
 
                    any_address = "::" # in6addr_any
 
2505
                    any_address = "::"  # in6addr_any
1488
2506
                else:
1489
 
                    any_address = socket.INADDR_ANY
 
2507
                    any_address = "0.0.0.0"  # INADDR_ANY
1490
2508
                self.server_address = (any_address,
1491
2509
                                       self.server_address[1])
1492
2510
            elif not self.server_address[1]:
1493
 
                self.server_address = (self.server_address[0],
1494
 
                                       0)
 
2511
                self.server_address = (self.server_address[0], 0)
1495
2512
#                 if self.interface:
1496
2513
#                     self.server_address = (self.server_address[0],
1497
2514
#                                            0, # port
1503
2520
 
1504
2521
class MandosServer(IPv6_TCPServer):
1505
2522
    """Mandos server.
1506
 
    
 
2523
 
1507
2524
    Attributes:
1508
2525
        clients:        set of Client objects
1509
2526
        gnutls_priority GnuTLS priority string
1510
2527
        use_dbus:       Boolean; to emit D-Bus signals or not
1511
 
    
1512
 
    Assumes a gobject.MainLoop event loop.
 
2528
 
 
2529
    Assumes a GLib.MainLoop event loop.
1513
2530
    """
 
2531
 
1514
2532
    def __init__(self, server_address, RequestHandlerClass,
1515
 
                 interface=None, use_ipv6=True, clients=None,
1516
 
                 gnutls_priority=None, use_dbus=True):
 
2533
                 interface=None,
 
2534
                 use_ipv6=True,
 
2535
                 clients=None,
 
2536
                 gnutls_priority=None,
 
2537
                 use_dbus=True,
 
2538
                 socketfd=None):
1517
2539
        self.enabled = False
1518
2540
        self.clients = clients
1519
2541
        if self.clients is None:
1520
 
            self.clients = set()
 
2542
            self.clients = {}
1521
2543
        self.use_dbus = use_dbus
1522
2544
        self.gnutls_priority = gnutls_priority
1523
2545
        IPv6_TCPServer.__init__(self, server_address,
1524
2546
                                RequestHandlerClass,
1525
 
                                interface = interface,
1526
 
                                use_ipv6 = use_ipv6)
 
2547
                                interface=interface,
 
2548
                                use_ipv6=use_ipv6,
 
2549
                                socketfd=socketfd)
 
2550
 
1527
2551
    def server_activate(self):
1528
2552
        if self.enabled:
1529
2553
            return socketserver.TCPServer.server_activate(self)
 
2554
 
1530
2555
    def enable(self):
1531
2556
        self.enabled = True
1532
 
    def add_pipe(self, parent_pipe):
 
2557
 
 
2558
    def add_pipe(self, parent_pipe, proc):
1533
2559
        # Call "handle_ipc" for both data and EOF events
1534
 
        gobject.io_add_watch(parent_pipe.fileno(),
1535
 
                             gobject.IO_IN | gobject.IO_HUP,
1536
 
                             functools.partial(self.handle_ipc,
1537
 
                                               parent_pipe = parent_pipe))
1538
 
        
1539
 
    def handle_ipc(self, source, condition, parent_pipe=None,
 
2560
        GLib.io_add_watch(
 
2561
            parent_pipe.fileno(),
 
2562
            GLib.IO_IN | GLib.IO_HUP,
 
2563
            functools.partial(self.handle_ipc,
 
2564
                              parent_pipe=parent_pipe,
 
2565
                              proc=proc))
 
2566
 
 
2567
    def handle_ipc(self, source, condition,
 
2568
                   parent_pipe=None,
 
2569
                   proc=None,
1540
2570
                   client_object=None):
1541
 
        condition_names = {
1542
 
            gobject.IO_IN: "IN",   # There is data to read.
1543
 
            gobject.IO_OUT: "OUT", # Data can be written (without
1544
 
                                    # blocking).
1545
 
            gobject.IO_PRI: "PRI", # There is urgent data to read.
1546
 
            gobject.IO_ERR: "ERR", # Error condition.
1547
 
            gobject.IO_HUP: "HUP"  # Hung up (the connection has been
1548
 
                                    # broken, usually for pipes and
1549
 
                                    # sockets).
1550
 
            }
1551
 
        conditions_string = ' | '.join(name
1552
 
                                       for cond, name in
1553
 
                                       condition_names.iteritems()
1554
 
                                       if cond & condition)
1555
 
        # error or the other end of multiprocessing.Pipe has closed
1556
 
        if condition & (gobject.IO_ERR | condition & gobject.IO_HUP):
 
2571
        # error, or the other end of multiprocessing.Pipe has closed
 
2572
        if condition & (GLib.IO_ERR | GLib.IO_HUP):
 
2573
            # Wait for other process to exit
 
2574
            proc.join()
1557
2575
            return False
1558
 
        
 
2576
 
1559
2577
        # Read a request from the child
1560
2578
        request = parent_pipe.recv()
1561
2579
        command = request[0]
1562
 
        
 
2580
 
1563
2581
        if command == 'init':
1564
 
            fpr = request[1]
 
2582
            fpr = request[1].decode("ascii")
1565
2583
            address = request[2]
1566
 
            
1567
 
            for c in self.clients:
 
2584
 
 
2585
            for c in self.clients.values():
1568
2586
                if c.fingerprint == fpr:
1569
2587
                    client = c
1570
2588
                    break
1573
2591
                            "dress: %s", fpr, address)
1574
2592
                if self.use_dbus:
1575
2593
                    # Emit D-Bus signal
1576
 
                    mandos_dbus_service.ClientNotFound(fpr, address[0])
 
2594
                    mandos_dbus_service.ClientNotFound(fpr,
 
2595
                                                       address[0])
1577
2596
                parent_pipe.send(False)
1578
2597
                return False
1579
 
            
1580
 
            gobject.io_add_watch(parent_pipe.fileno(),
1581
 
                                 gobject.IO_IN | gobject.IO_HUP,
1582
 
                                 functools.partial(self.handle_ipc,
1583
 
                                                   parent_pipe = parent_pipe,
1584
 
                                                   client_object = client))
 
2598
 
 
2599
            GLib.io_add_watch(
 
2600
                parent_pipe.fileno(),
 
2601
                GLib.IO_IN | GLib.IO_HUP,
 
2602
                functools.partial(self.handle_ipc,
 
2603
                                  parent_pipe=parent_pipe,
 
2604
                                  proc=proc,
 
2605
                                  client_object=client))
1585
2606
            parent_pipe.send(True)
1586
 
            # remove the old hook in favor of the new above hook on same fileno
 
2607
            # remove the old hook in favor of the new above hook on
 
2608
            # same fileno
1587
2609
            return False
1588
2610
        if command == 'funcall':
1589
2611
            funcname = request[1]
1590
2612
            args = request[2]
1591
2613
            kwargs = request[3]
1592
 
            
1593
 
            parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))
 
2614
 
 
2615
            parent_pipe.send(('data', getattr(client_object,
 
2616
                                              funcname)(*args,
 
2617
                                                        **kwargs)))
1594
2618
 
1595
2619
        if command == 'getattr':
1596
2620
            attrname = request[1]
1597
 
            if callable(client_object.__getattribute__(attrname)):
1598
 
                parent_pipe.send(('function',))
 
2621
            if isinstance(client_object.__getattribute__(attrname),
 
2622
                          collections.Callable):
 
2623
                parent_pipe.send(('function', ))
1599
2624
            else:
1600
 
                parent_pipe.send(('data', client_object.__getattribute__(attrname)))
1601
 
        
 
2625
                parent_pipe.send((
 
2626
                    'data', client_object.__getattribute__(attrname)))
 
2627
 
1602
2628
        if command == 'setattr':
1603
2629
            attrname = request[1]
1604
2630
            value = request[2]
1607
2633
        return True
1608
2634
 
1609
2635
 
 
2636
def rfc3339_duration_to_delta(duration):
 
2637
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
 
2638
 
 
2639
    >>> rfc3339_duration_to_delta("P7D")
 
2640
    datetime.timedelta(7)
 
2641
    >>> rfc3339_duration_to_delta("PT60S")
 
2642
    datetime.timedelta(0, 60)
 
2643
    >>> rfc3339_duration_to_delta("PT60M")
 
2644
    datetime.timedelta(0, 3600)
 
2645
    >>> rfc3339_duration_to_delta("PT24H")
 
2646
    datetime.timedelta(1)
 
2647
    >>> rfc3339_duration_to_delta("P1W")
 
2648
    datetime.timedelta(7)
 
2649
    >>> rfc3339_duration_to_delta("PT5M30S")
 
2650
    datetime.timedelta(0, 330)
 
2651
    >>> rfc3339_duration_to_delta("P1DT3M20S")
 
2652
    datetime.timedelta(1, 200)
 
2653
    """
 
2654
 
 
2655
    # Parsing an RFC 3339 duration with regular expressions is not
 
2656
    # possible - there would have to be multiple places for the same
 
2657
    # values, like seconds.  The current code, while more esoteric, is
 
2658
    # cleaner without depending on a parsing library.  If Python had a
 
2659
    # built-in library for parsing we would use it, but we'd like to
 
2660
    # avoid excessive use of external libraries.
 
2661
 
 
2662
    # New type for defining tokens, syntax, and semantics all-in-one
 
2663
    Token = collections.namedtuple("Token", (
 
2664
        "regexp",  # To match token; if "value" is not None, must have
 
2665
                   # a "group" containing digits
 
2666
        "value",   # datetime.timedelta or None
 
2667
        "followers"))           # Tokens valid after this token
 
2668
    # RFC 3339 "duration" tokens, syntax, and semantics; taken from
 
2669
    # the "duration" ABNF definition in RFC 3339, Appendix A.
 
2670
    token_end = Token(re.compile(r"$"), None, frozenset())
 
2671
    token_second = Token(re.compile(r"(\d+)S"),
 
2672
                         datetime.timedelta(seconds=1),
 
2673
                         frozenset((token_end, )))
 
2674
    token_minute = Token(re.compile(r"(\d+)M"),
 
2675
                         datetime.timedelta(minutes=1),
 
2676
                         frozenset((token_second, token_end)))
 
2677
    token_hour = Token(re.compile(r"(\d+)H"),
 
2678
                       datetime.timedelta(hours=1),
 
2679
                       frozenset((token_minute, token_end)))
 
2680
    token_time = Token(re.compile(r"T"),
 
2681
                       None,
 
2682
                       frozenset((token_hour, token_minute,
 
2683
                                  token_second)))
 
2684
    token_day = Token(re.compile(r"(\d+)D"),
 
2685
                      datetime.timedelta(days=1),
 
2686
                      frozenset((token_time, token_end)))
 
2687
    token_month = Token(re.compile(r"(\d+)M"),
 
2688
                        datetime.timedelta(weeks=4),
 
2689
                        frozenset((token_day, token_end)))
 
2690
    token_year = Token(re.compile(r"(\d+)Y"),
 
2691
                       datetime.timedelta(weeks=52),
 
2692
                       frozenset((token_month, token_end)))
 
2693
    token_week = Token(re.compile(r"(\d+)W"),
 
2694
                       datetime.timedelta(weeks=1),
 
2695
                       frozenset((token_end, )))
 
2696
    token_duration = Token(re.compile(r"P"), None,
 
2697
                           frozenset((token_year, token_month,
 
2698
                                      token_day, token_time,
 
2699
                                      token_week)))
 
2700
    # Define starting values:
 
2701
    # Value so far
 
2702
    value = datetime.timedelta()
 
2703
    found_token = None
 
2704
    # Following valid tokens
 
2705
    followers = frozenset((token_duration, ))
 
2706
    # String left to parse
 
2707
    s = duration
 
2708
    # Loop until end token is found
 
2709
    while found_token is not token_end:
 
2710
        # Search for any currently valid tokens
 
2711
        for token in followers:
 
2712
            match = token.regexp.match(s)
 
2713
            if match is not None:
 
2714
                # Token found
 
2715
                if token.value is not None:
 
2716
                    # Value found, parse digits
 
2717
                    factor = int(match.group(1), 10)
 
2718
                    # Add to value so far
 
2719
                    value += factor * token.value
 
2720
                # Strip token from string
 
2721
                s = token.regexp.sub("", s, 1)
 
2722
                # Go to found token
 
2723
                found_token = token
 
2724
                # Set valid next tokens
 
2725
                followers = found_token.followers
 
2726
                break
 
2727
        else:
 
2728
            # No currently valid tokens were found
 
2729
            raise ValueError("Invalid RFC 3339 duration: {!r}"
 
2730
                             .format(duration))
 
2731
    # End token found
 
2732
    return value
 
2733
 
 
2734
 
1610
2735
def string_to_delta(interval):
1611
2736
    """Parse a string and return a datetime.timedelta
1612
 
    
 
2737
 
1613
2738
    >>> string_to_delta('7d')
1614
2739
    datetime.timedelta(7)
1615
2740
    >>> string_to_delta('60s')
1623
2748
    >>> string_to_delta('5m 30s')
1624
2749
    datetime.timedelta(0, 330)
1625
2750
    """
 
2751
 
 
2752
    try:
 
2753
        return rfc3339_duration_to_delta(interval)
 
2754
    except ValueError:
 
2755
        pass
 
2756
 
1626
2757
    timevalue = datetime.timedelta(0)
1627
2758
    for s in interval.split():
1628
2759
        try:
1629
 
            suffix = unicode(s[-1])
 
2760
            suffix = s[-1]
1630
2761
            value = int(s[:-1])
1631
2762
            if suffix == "d":
1632
2763
                delta = datetime.timedelta(value)
1639
2770
            elif suffix == "w":
1640
2771
                delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)
1641
2772
            else:
1642
 
                raise ValueError("Unknown suffix %r" % suffix)
1643
 
        except (ValueError, IndexError) as e:
 
2773
                raise ValueError("Unknown suffix {!r}".format(suffix))
 
2774
        except IndexError as e:
1644
2775
            raise ValueError(*(e.args))
1645
2776
        timevalue += delta
1646
2777
    return timevalue
1647
2778
 
1648
2779
 
1649
 
def if_nametoindex(interface):
1650
 
    """Call the C function if_nametoindex(), or equivalent
1651
 
    
1652
 
    Note: This function cannot accept a unicode string."""
1653
 
    global if_nametoindex
1654
 
    try:
1655
 
        if_nametoindex = (ctypes.cdll.LoadLibrary
1656
 
                          (ctypes.util.find_library("c"))
1657
 
                          .if_nametoindex)
1658
 
    except (OSError, AttributeError):
1659
 
        logger.warning("Doing if_nametoindex the hard way")
1660
 
        def if_nametoindex(interface):
1661
 
            "Get an interface index the hard way, i.e. using fcntl()"
1662
 
            SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
1663
 
            with contextlib.closing(socket.socket()) as s:
1664
 
                ifreq = fcntl.ioctl(s, SIOCGIFINDEX,
1665
 
                                    struct.pack(str("16s16x"),
1666
 
                                                interface))
1667
 
            interface_index = struct.unpack(str("I"),
1668
 
                                            ifreq[16:20])[0]
1669
 
            return interface_index
1670
 
    return if_nametoindex(interface)
1671
 
 
1672
 
 
1673
 
def daemon(nochdir = False, noclose = False):
 
2780
def daemon(nochdir=False, noclose=False):
1674
2781
    """See daemon(3).  Standard BSD Unix function.
1675
 
    
 
2782
 
1676
2783
    This should really exist as os.daemon, but it doesn't (yet)."""
1677
2784
    if os.fork():
1678
2785
        sys.exit()
1683
2790
        sys.exit()
1684
2791
    if not noclose:
1685
2792
        # Close all standard open file descriptors
1686
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
2793
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1687
2794
        if not stat.S_ISCHR(os.fstat(null).st_mode):
1688
2795
            raise OSError(errno.ENODEV,
1689
 
                          "%s not a character device"
1690
 
                          % os.path.devnull)
 
2796
                          "{} not a character device"
 
2797
                          .format(os.devnull))
1691
2798
        os.dup2(null, sys.stdin.fileno())
1692
2799
        os.dup2(null, sys.stdout.fileno())
1693
2800
        os.dup2(null, sys.stderr.fileno())
1696
2803
 
1697
2804
 
1698
2805
def main():
1699
 
    
 
2806
 
1700
2807
    ##################################################################
1701
2808
    # Parsing of options, both command line and config file
1702
 
    
 
2809
 
1703
2810
    parser = argparse.ArgumentParser()
1704
2811
    parser.add_argument("-v", "--version", action="version",
1705
 
                        version = "%%(prog)s %s" % version,
 
2812
                        version="%(prog)s {}".format(version),
1706
2813
                        help="show version number and exit")
1707
2814
    parser.add_argument("-i", "--interface", metavar="IF",
1708
2815
                        help="Bind to interface IF")
1714
2821
                        help="Run self-test")
1715
2822
    parser.add_argument("--debug", action="store_true",
1716
2823
                        help="Debug mode; run in foreground and log"
1717
 
                        " to terminal")
 
2824
                        " to terminal", default=None)
1718
2825
    parser.add_argument("--debuglevel", metavar="LEVEL",
1719
2826
                        help="Debug level for stdout output")
1720
2827
    parser.add_argument("--priority", help="GnuTLS"
1727
2834
                        " files")
1728
2835
    parser.add_argument("--no-dbus", action="store_false",
1729
2836
                        dest="use_dbus", help="Do not provide D-Bus"
1730
 
                        " system bus interface")
 
2837
                        " system bus interface", default=None)
1731
2838
    parser.add_argument("--no-ipv6", action="store_false",
1732
 
                        dest="use_ipv6", help="Do not use IPv6")
 
2839
                        dest="use_ipv6", help="Do not use IPv6",
 
2840
                        default=None)
 
2841
    parser.add_argument("--no-restore", action="store_false",
 
2842
                        dest="restore", help="Do not restore stored"
 
2843
                        " state", default=None)
 
2844
    parser.add_argument("--socket", type=int,
 
2845
                        help="Specify a file descriptor to a network"
 
2846
                        " socket to use instead of creating one")
 
2847
    parser.add_argument("--statedir", metavar="DIR",
 
2848
                        help="Directory to save/restore state in")
 
2849
    parser.add_argument("--foreground", action="store_true",
 
2850
                        help="Run in foreground", default=None)
 
2851
    parser.add_argument("--no-zeroconf", action="store_false",
 
2852
                        dest="zeroconf", help="Do not use Zeroconf",
 
2853
                        default=None)
 
2854
 
1733
2855
    options = parser.parse_args()
1734
 
    
 
2856
 
1735
2857
    if options.check:
1736
2858
        import doctest
1737
 
        doctest.testmod()
1738
 
        sys.exit()
1739
 
    
 
2859
        fail_count, test_count = doctest.testmod()
 
2860
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
2861
 
1740
2862
    # Default values for config file for server-global settings
1741
 
    server_defaults = { "interface": "",
1742
 
                        "address": "",
1743
 
                        "port": "",
1744
 
                        "debug": "False",
1745
 
                        "priority":
1746
 
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",
1747
 
                        "servicename": "Mandos",
1748
 
                        "use_dbus": "True",
1749
 
                        "use_ipv6": "True",
1750
 
                        "debuglevel": "",
1751
 
                        }
1752
 
    
 
2863
    server_defaults = {"interface": "",
 
2864
                       "address": "",
 
2865
                       "port": "",
 
2866
                       "debug": "False",
 
2867
                       "priority":
 
2868
                       "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
2869
                       ":+SIGN-DSA-SHA256",
 
2870
                       "servicename": "Mandos",
 
2871
                       "use_dbus": "True",
 
2872
                       "use_ipv6": "True",
 
2873
                       "debuglevel": "",
 
2874
                       "restore": "True",
 
2875
                       "socket": "",
 
2876
                       "statedir": "/var/lib/mandos",
 
2877
                       "foreground": "False",
 
2878
                       "zeroconf": "True",
 
2879
                       }
 
2880
 
1753
2881
    # Parse config file for server-global settings
1754
2882
    server_config = configparser.SafeConfigParser(server_defaults)
1755
2883
    del server_defaults
1756
 
    server_config.read(os.path.join(options.configdir,
1757
 
                                    "mandos.conf"))
 
2884
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
1758
2885
    # Convert the SafeConfigParser object to a dict
1759
2886
    server_settings = server_config.defaults()
1760
2887
    # Use the appropriate methods on the non-string config options
1761
 
    for option in ("debug", "use_dbus", "use_ipv6"):
 
2888
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
2889
                   "foreground", "zeroconf"):
1762
2890
        server_settings[option] = server_config.getboolean("DEFAULT",
1763
2891
                                                           option)
1764
2892
    if server_settings["port"]:
1765
2893
        server_settings["port"] = server_config.getint("DEFAULT",
1766
2894
                                                       "port")
 
2895
    if server_settings["socket"]:
 
2896
        server_settings["socket"] = server_config.getint("DEFAULT",
 
2897
                                                         "socket")
 
2898
        # Later, stdin will, and stdout and stderr might, be dup'ed
 
2899
        # over with an opened os.devnull.  But we don't want this to
 
2900
        # happen with a supplied network socket.
 
2901
        if 0 <= server_settings["socket"] <= 2:
 
2902
            server_settings["socket"] = os.dup(server_settings
 
2903
                                               ["socket"])
1767
2904
    del server_config
1768
 
    
 
2905
 
1769
2906
    # Override the settings from the config file with command line
1770
2907
    # options, if set.
1771
2908
    for option in ("interface", "address", "port", "debug",
1772
 
                   "priority", "servicename", "configdir",
1773
 
                   "use_dbus", "use_ipv6", "debuglevel"):
 
2909
                   "priority", "servicename", "configdir", "use_dbus",
 
2910
                   "use_ipv6", "debuglevel", "restore", "statedir",
 
2911
                   "socket", "foreground", "zeroconf"):
1774
2912
        value = getattr(options, option)
1775
2913
        if value is not None:
1776
2914
            server_settings[option] = value
1777
2915
    del options
1778
2916
    # Force all strings to be unicode
1779
2917
    for option in server_settings.keys():
1780
 
        if type(server_settings[option]) is str:
1781
 
            server_settings[option] = unicode(server_settings[option])
 
2918
        if isinstance(server_settings[option], bytes):
 
2919
            server_settings[option] = (server_settings[option]
 
2920
                                       .decode("utf-8"))
 
2921
    # Force all boolean options to be boolean
 
2922
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
 
2923
                   "foreground", "zeroconf"):
 
2924
        server_settings[option] = bool(server_settings[option])
 
2925
    # Debug implies foreground
 
2926
    if server_settings["debug"]:
 
2927
        server_settings["foreground"] = True
1782
2928
    # Now we have our good server settings in "server_settings"
1783
 
    
 
2929
 
1784
2930
    ##################################################################
1785
 
    
 
2931
 
 
2932
    if (not server_settings["zeroconf"]
 
2933
        and not (server_settings["port"]
 
2934
                 or server_settings["socket"] != "")):
 
2935
        parser.error("Needs port or socket to work without Zeroconf")
 
2936
 
1786
2937
    # For convenience
1787
2938
    debug = server_settings["debug"]
1788
2939
    debuglevel = server_settings["debuglevel"]
1789
2940
    use_dbus = server_settings["use_dbus"]
1790
2941
    use_ipv6 = server_settings["use_ipv6"]
 
2942
    stored_state_path = os.path.join(server_settings["statedir"],
 
2943
                                     stored_state_file)
 
2944
    foreground = server_settings["foreground"]
 
2945
    zeroconf = server_settings["zeroconf"]
 
2946
 
 
2947
    if debug:
 
2948
        initlogger(debug, logging.DEBUG)
 
2949
    else:
 
2950
        if not debuglevel:
 
2951
            initlogger(debug)
 
2952
        else:
 
2953
            level = getattr(logging, debuglevel.upper())
 
2954
            initlogger(debug, level)
1791
2955
 
1792
2956
    if server_settings["servicename"] != "Mandos":
1793
 
        syslogger.setFormatter(logging.Formatter
1794
 
                               ('Mandos (%s) [%%(process)d]:'
1795
 
                                ' %%(levelname)s: %%(message)s'
1796
 
                                % server_settings["servicename"]))
1797
 
    
 
2957
        syslogger.setFormatter(
 
2958
            logging.Formatter('Mandos ({}) [%(process)d]:'
 
2959
                              ' %(levelname)s: %(message)s'.format(
 
2960
                                  server_settings["servicename"])))
 
2961
 
1798
2962
    # Parse config file with clients
1799
 
    client_defaults = { "timeout": "1h",
1800
 
                        "interval": "5m",
1801
 
                        "checker": "fping -q -- %%(host)s",
1802
 
                        "host": "",
1803
 
                        "approval_delay": "0s",
1804
 
                        "approval_duration": "1s",
1805
 
                        }
1806
 
    client_config = configparser.SafeConfigParser(client_defaults)
 
2963
    client_config = configparser.SafeConfigParser(Client
 
2964
                                                  .client_defaults)
1807
2965
    client_config.read(os.path.join(server_settings["configdir"],
1808
2966
                                    "clients.conf"))
1809
 
    
 
2967
 
1810
2968
    global mandos_dbus_service
1811
2969
    mandos_dbus_service = None
1812
 
    
1813
 
    tcp_server = MandosServer((server_settings["address"],
1814
 
                               server_settings["port"]),
1815
 
                              ClientHandler,
1816
 
                              interface=(server_settings["interface"]
1817
 
                                         or None),
1818
 
                              use_ipv6=use_ipv6,
1819
 
                              gnutls_priority=
1820
 
                              server_settings["priority"],
1821
 
                              use_dbus=use_dbus)
1822
 
    if not debug:
1823
 
        pidfilename = "/var/run/mandos.pid"
1824
 
        try:
1825
 
            pidfile = open(pidfilename, "w")
1826
 
        except IOError:
1827
 
            logger.error("Could not open file %r", pidfilename)
1828
 
    
1829
 
    try:
1830
 
        uid = pwd.getpwnam("_mandos").pw_uid
1831
 
        gid = pwd.getpwnam("_mandos").pw_gid
1832
 
    except KeyError:
1833
 
        try:
1834
 
            uid = pwd.getpwnam("mandos").pw_uid
1835
 
            gid = pwd.getpwnam("mandos").pw_gid
 
2970
 
 
2971
    socketfd = None
 
2972
    if server_settings["socket"] != "":
 
2973
        socketfd = server_settings["socket"]
 
2974
    tcp_server = MandosServer(
 
2975
        (server_settings["address"], server_settings["port"]),
 
2976
        ClientHandler,
 
2977
        interface=(server_settings["interface"] or None),
 
2978
        use_ipv6=use_ipv6,
 
2979
        gnutls_priority=server_settings["priority"],
 
2980
        use_dbus=use_dbus,
 
2981
        socketfd=socketfd)
 
2982
    if not foreground:
 
2983
        pidfilename = "/run/mandos.pid"
 
2984
        if not os.path.isdir("/run/."):
 
2985
            pidfilename = "/var/run/mandos.pid"
 
2986
        pidfile = None
 
2987
        try:
 
2988
            pidfile = codecs.open(pidfilename, "w", encoding="utf-8")
 
2989
        except IOError as e:
 
2990
            logger.error("Could not open file %r", pidfilename,
 
2991
                         exc_info=e)
 
2992
 
 
2993
    for name, group in (("_mandos", "_mandos"),
 
2994
                        ("mandos", "mandos"),
 
2995
                        ("nobody", "nogroup")):
 
2996
        try:
 
2997
            uid = pwd.getpwnam(name).pw_uid
 
2998
            gid = pwd.getpwnam(group).pw_gid
 
2999
            break
1836
3000
        except KeyError:
1837
 
            try:
1838
 
                uid = pwd.getpwnam("nobody").pw_uid
1839
 
                gid = pwd.getpwnam("nobody").pw_gid
1840
 
            except KeyError:
1841
 
                uid = 65534
1842
 
                gid = 65534
 
3001
            continue
 
3002
    else:
 
3003
        uid = 65534
 
3004
        gid = 65534
1843
3005
    try:
1844
3006
        os.setgid(gid)
1845
3007
        os.setuid(uid)
 
3008
        if debug:
 
3009
            logger.debug("Did setuid/setgid to {}:{}".format(uid,
 
3010
                                                             gid))
1846
3011
    except OSError as error:
1847
 
        if error[0] != errno.EPERM:
1848
 
            raise error
1849
 
    
1850
 
    if not debug and not debuglevel:
1851
 
        syslogger.setLevel(logging.WARNING)
1852
 
        console.setLevel(logging.WARNING)
1853
 
    if debuglevel:
1854
 
        level = getattr(logging, debuglevel.upper())
1855
 
        syslogger.setLevel(level)
1856
 
        console.setLevel(level)
 
3012
        logger.warning("Failed to setuid/setgid to {}:{}: {}"
 
3013
                       .format(uid, gid, os.strerror(error.errno)))
 
3014
        if error.errno != errno.EPERM:
 
3015
            raise
1857
3016
 
1858
3017
    if debug:
1859
3018
        # Enable all possible GnuTLS debugging
1860
 
        
 
3019
 
1861
3020
        # "Use a log level over 10 to enable all debugging options."
1862
3021
        # - GnuTLS manual
1863
 
        gnutls.library.functions.gnutls_global_set_log_level(11)
1864
 
        
1865
 
        @gnutls.library.types.gnutls_log_func
 
3022
        gnutls.global_set_log_level(11)
 
3023
 
 
3024
        @gnutls.log_func
1866
3025
        def debug_gnutls(level, string):
1867
3026
            logger.debug("GnuTLS: %s", string[:-1])
1868
 
        
1869
 
        (gnutls.library.functions
1870
 
         .gnutls_global_set_log_function(debug_gnutls))
1871
 
        
 
3027
 
 
3028
        gnutls.global_set_log_function(debug_gnutls)
 
3029
 
1872
3030
        # Redirect stdin so all checkers get /dev/null
1873
 
        null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)
 
3031
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
1874
3032
        os.dup2(null, sys.stdin.fileno())
1875
3033
        if null > 2:
1876
3034
            os.close(null)
1877
 
    else:
1878
 
        # No console logging
1879
 
        logger.removeHandler(console)
1880
 
    
 
3035
 
1881
3036
    # Need to fork before connecting to D-Bus
1882
 
    if not debug:
 
3037
    if not foreground:
1883
3038
        # Close all input and output, do double fork, etc.
1884
3039
        daemon()
1885
 
    
 
3040
 
 
3041
    # multiprocessing will use threads, so before we use GLib we need
 
3042
    # to inform GLib that threads will be used.
 
3043
    GLib.threads_init()
 
3044
 
1886
3045
    global main_loop
1887
3046
    # From the Avahi example code
1888
 
    DBusGMainLoop(set_as_default=True )
1889
 
    main_loop = gobject.MainLoop()
 
3047
    DBusGMainLoop(set_as_default=True)
 
3048
    main_loop = GLib.MainLoop()
1890
3049
    bus = dbus.SystemBus()
1891
3050
    # End of Avahi example code
1892
3051
    if use_dbus:
1893
3052
        try:
1894
 
            bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",
1895
 
                                            bus, do_not_queue=True)
1896
 
        except dbus.exceptions.NameExistsException as e:
1897
 
            logger.error(unicode(e) + ", disabling D-Bus")
 
3053
            bus_name = dbus.service.BusName("se.recompile.Mandos",
 
3054
                                            bus,
 
3055
                                            do_not_queue=True)
 
3056
            old_bus_name = dbus.service.BusName(
 
3057
                "se.bsnet.fukt.Mandos", bus,
 
3058
                do_not_queue=True)
 
3059
        except dbus.exceptions.DBusException as e:
 
3060
            logger.error("Disabling D-Bus:", exc_info=e)
1898
3061
            use_dbus = False
1899
3062
            server_settings["use_dbus"] = False
1900
3063
            tcp_server.use_dbus = False
1901
 
    protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
1902
 
    service = AvahiService(name = server_settings["servicename"],
1903
 
                           servicetype = "_mandos._tcp",
1904
 
                           protocol = protocol, bus = bus)
1905
 
    if server_settings["interface"]:
1906
 
        service.interface = (if_nametoindex
1907
 
                             (str(server_settings["interface"])))
1908
 
    
 
3064
    if zeroconf:
 
3065
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
 
3066
        service = AvahiServiceToSyslog(
 
3067
            name=server_settings["servicename"],
 
3068
            servicetype="_mandos._tcp",
 
3069
            protocol=protocol,
 
3070
            bus=bus)
 
3071
        if server_settings["interface"]:
 
3072
            service.interface = if_nametoindex(
 
3073
                server_settings["interface"].encode("utf-8"))
 
3074
 
1909
3075
    global multiprocessing_manager
1910
3076
    multiprocessing_manager = multiprocessing.Manager()
1911
 
    
 
3077
 
1912
3078
    client_class = Client
1913
3079
    if use_dbus:
1914
 
        client_class = functools.partial(ClientDBus, bus = bus)
1915
 
    def client_config_items(config, section):
1916
 
        special_settings = {
1917
 
            "approved_by_default":
1918
 
                lambda: config.getboolean(section,
1919
 
                                          "approved_by_default"),
1920
 
            }
1921
 
        for name, value in config.items(section):
 
3080
        client_class = functools.partial(ClientDBus, bus=bus)
 
3081
 
 
3082
    client_settings = Client.config_parser(client_config)
 
3083
    old_client_settings = {}
 
3084
    clients_data = {}
 
3085
 
 
3086
    # This is used to redirect stdout and stderr for checker processes
 
3087
    global wnull
 
3088
    wnull = open(os.devnull, "w")  # A writable /dev/null
 
3089
    # Only used if server is running in foreground but not in debug
 
3090
    # mode
 
3091
    if debug or not foreground:
 
3092
        wnull.close()
 
3093
 
 
3094
    # Get client data and settings from last running state.
 
3095
    if server_settings["restore"]:
 
3096
        try:
 
3097
            with open(stored_state_path, "rb") as stored_state:
 
3098
                if sys.version_info.major == 2:
 
3099
                    clients_data, old_client_settings = pickle.load(
 
3100
                        stored_state)
 
3101
                else:
 
3102
                    bytes_clients_data, bytes_old_client_settings = (
 
3103
                        pickle.load(stored_state, encoding="bytes"))
 
3104
                    #   Fix bytes to strings
 
3105
                    #  clients_data
 
3106
                    # .keys()
 
3107
                    clients_data = {(key.decode("utf-8")
 
3108
                                     if isinstance(key, bytes)
 
3109
                                     else key): value
 
3110
                                    for key, value in
 
3111
                                    bytes_clients_data.items()}
 
3112
                    del bytes_clients_data
 
3113
                    for key in clients_data:
 
3114
                        value = {(k.decode("utf-8")
 
3115
                                  if isinstance(k, bytes) else k): v
 
3116
                                 for k, v in
 
3117
                                 clients_data[key].items()}
 
3118
                        clients_data[key] = value
 
3119
                        # .client_structure
 
3120
                        value["client_structure"] = [
 
3121
                            (s.decode("utf-8")
 
3122
                             if isinstance(s, bytes)
 
3123
                             else s) for s in
 
3124
                            value["client_structure"]]
 
3125
                        # .name & .host
 
3126
                        for k in ("name", "host"):
 
3127
                            if isinstance(value[k], bytes):
 
3128
                                value[k] = value[k].decode("utf-8")
 
3129
                    #  old_client_settings
 
3130
                    # .keys()
 
3131
                    old_client_settings = {
 
3132
                        (key.decode("utf-8")
 
3133
                         if isinstance(key, bytes)
 
3134
                         else key): value
 
3135
                        for key, value in
 
3136
                        bytes_old_client_settings.items()}
 
3137
                    del bytes_old_client_settings
 
3138
                    # .host
 
3139
                    for value in old_client_settings.values():
 
3140
                        if isinstance(value["host"], bytes):
 
3141
                            value["host"] = (value["host"]
 
3142
                                             .decode("utf-8"))
 
3143
            os.remove(stored_state_path)
 
3144
        except IOError as e:
 
3145
            if e.errno == errno.ENOENT:
 
3146
                logger.warning("Could not load persistent state:"
 
3147
                               " {}".format(os.strerror(e.errno)))
 
3148
            else:
 
3149
                logger.critical("Could not load persistent state:",
 
3150
                                exc_info=e)
 
3151
                raise
 
3152
        except EOFError as e:
 
3153
            logger.warning("Could not load persistent state: "
 
3154
                           "EOFError:",
 
3155
                           exc_info=e)
 
3156
 
 
3157
    with PGPEngine() as pgp:
 
3158
        for client_name, client in clients_data.items():
 
3159
            # Skip removed clients
 
3160
            if client_name not in client_settings:
 
3161
                continue
 
3162
 
 
3163
            # Decide which value to use after restoring saved state.
 
3164
            # We have three different values: Old config file,
 
3165
            # new config file, and saved state.
 
3166
            # New config value takes precedence if it differs from old
 
3167
            # config value, otherwise use saved state.
 
3168
            for name, value in client_settings[client_name].items():
 
3169
                try:
 
3170
                    # For each value in new config, check if it
 
3171
                    # differs from the old config value (Except for
 
3172
                    # the "secret" attribute)
 
3173
                    if (name != "secret"
 
3174
                        and (value !=
 
3175
                             old_client_settings[client_name][name])):
 
3176
                        client[name] = value
 
3177
                except KeyError:
 
3178
                    pass
 
3179
 
 
3180
            # Clients who has passed its expire date can still be
 
3181
            # enabled if its last checker was successful.  A Client
 
3182
            # whose checker succeeded before we stored its state is
 
3183
            # assumed to have successfully run all checkers during
 
3184
            # downtime.
 
3185
            if client["enabled"]:
 
3186
                if datetime.datetime.utcnow() >= client["expires"]:
 
3187
                    if not client["last_checked_ok"]:
 
3188
                        logger.warning(
 
3189
                            "disabling client {} - Client never "
 
3190
                            "performed a successful checker".format(
 
3191
                                client_name))
 
3192
                        client["enabled"] = False
 
3193
                    elif client["last_checker_status"] != 0:
 
3194
                        logger.warning(
 
3195
                            "disabling client {} - Client last"
 
3196
                            " checker failed with error code"
 
3197
                            " {}".format(
 
3198
                                client_name,
 
3199
                                client["last_checker_status"]))
 
3200
                        client["enabled"] = False
 
3201
                    else:
 
3202
                        client["expires"] = (
 
3203
                            datetime.datetime.utcnow()
 
3204
                            + client["timeout"])
 
3205
                        logger.debug("Last checker succeeded,"
 
3206
                                     " keeping {} enabled".format(
 
3207
                                         client_name))
1922
3208
            try:
1923
 
                yield (name, special_settings[name]())
1924
 
            except KeyError:
1925
 
                yield (name, value)
1926
 
    
1927
 
    tcp_server.clients.update(set(
1928
 
            client_class(name = section,
1929
 
                         config= dict(client_config_items(
1930
 
                        client_config, section)))
1931
 
            for section in client_config.sections()))
 
3209
                client["secret"] = pgp.decrypt(
 
3210
                    client["encrypted_secret"],
 
3211
                    client_settings[client_name]["secret"])
 
3212
            except PGPError:
 
3213
                # If decryption fails, we use secret from new settings
 
3214
                logger.debug("Failed to decrypt {} old secret".format(
 
3215
                    client_name))
 
3216
                client["secret"] = (client_settings[client_name]
 
3217
                                    ["secret"])
 
3218
 
 
3219
    # Add/remove clients based on new changes made to config
 
3220
    for client_name in (set(old_client_settings)
 
3221
                        - set(client_settings)):
 
3222
        del clients_data[client_name]
 
3223
    for client_name in (set(client_settings)
 
3224
                        - set(old_client_settings)):
 
3225
        clients_data[client_name] = client_settings[client_name]
 
3226
 
 
3227
    # Create all client objects
 
3228
    for client_name, client in clients_data.items():
 
3229
        tcp_server.clients[client_name] = client_class(
 
3230
            name=client_name,
 
3231
            settings=client,
 
3232
            server_settings=server_settings)
 
3233
 
1932
3234
    if not tcp_server.clients:
1933
3235
        logger.warning("No clients defined")
1934
 
        
1935
 
    if not debug:
1936
 
        try:
1937
 
            with pidfile:
1938
 
                pid = os.getpid()
1939
 
                pidfile.write(str(pid) + "\n".encode("utf-8"))
1940
 
            del pidfile
1941
 
        except IOError:
1942
 
            logger.error("Could not write to file %r with PID %d",
1943
 
                         pidfilename, pid)
1944
 
        except NameError:
1945
 
            # "pidfile" was never created
1946
 
            pass
 
3236
 
 
3237
    if not foreground:
 
3238
        if pidfile is not None:
 
3239
            pid = os.getpid()
 
3240
            try:
 
3241
                with pidfile:
 
3242
                    print(pid, file=pidfile)
 
3243
            except IOError:
 
3244
                logger.error("Could not write to file %r with PID %d",
 
3245
                             pidfilename, pid)
 
3246
        del pidfile
1947
3247
        del pidfilename
1948
 
        
1949
 
        signal.signal(signal.SIGINT, signal.SIG_IGN)
1950
 
 
1951
 
    signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())
1952
 
    signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())
1953
 
    
 
3248
 
 
3249
    for termsig in (signal.SIGHUP, signal.SIGTERM):
 
3250
        GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
 
3251
                             lambda: main_loop.quit() and False)
 
3252
 
1954
3253
    if use_dbus:
1955
 
        class MandosDBusService(dbus.service.Object):
 
3254
 
 
3255
        @alternate_dbus_interfaces(
 
3256
            {"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
 
3257
        class MandosDBusService(DBusObjectWithObjectManager):
1956
3258
            """A D-Bus proxy object"""
 
3259
 
1957
3260
            def __init__(self):
1958
3261
                dbus.service.Object.__init__(self, bus, "/")
1959
 
            _interface = "se.bsnet.fukt.Mandos"
1960
 
            
 
3262
 
 
3263
            _interface = "se.recompile.Mandos"
 
3264
 
1961
3265
            @dbus.service.signal(_interface, signature="o")
1962
3266
            def ClientAdded(self, objpath):
1963
3267
                "D-Bus signal"
1964
3268
                pass
1965
 
            
 
3269
 
1966
3270
            @dbus.service.signal(_interface, signature="ss")
1967
3271
            def ClientNotFound(self, fingerprint, address):
1968
3272
                "D-Bus signal"
1969
3273
                pass
1970
 
            
 
3274
 
 
3275
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3276
                               "true"})
1971
3277
            @dbus.service.signal(_interface, signature="os")
1972
3278
            def ClientRemoved(self, objpath, name):
1973
3279
                "D-Bus signal"
1974
3280
                pass
1975
 
            
 
3281
 
 
3282
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3283
                               "true"})
1976
3284
            @dbus.service.method(_interface, out_signature="ao")
1977
3285
            def GetAllClients(self):
1978
3286
                "D-Bus method"
1979
 
                return dbus.Array(c.dbus_object_path
1980
 
                                  for c in tcp_server.clients)
1981
 
            
 
3287
                return dbus.Array(c.dbus_object_path for c in
 
3288
                                  tcp_server.clients.values())
 
3289
 
 
3290
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
 
3291
                               "true"})
1982
3292
            @dbus.service.method(_interface,
1983
3293
                                 out_signature="a{oa{sv}}")
1984
3294
            def GetAllClientsWithProperties(self):
1985
3295
                "D-Bus method"
1986
3296
                return dbus.Dictionary(
1987
 
                    ((c.dbus_object_path, c.GetAll(""))
1988
 
                     for c in tcp_server.clients),
 
3297
                    {c.dbus_object_path: c.GetAll(
 
3298
                        "se.recompile.Mandos.Client")
 
3299
                     for c in tcp_server.clients.values()},
1989
3300
                    signature="oa{sv}")
1990
 
            
 
3301
 
1991
3302
            @dbus.service.method(_interface, in_signature="o")
1992
3303
            def RemoveClient(self, object_path):
1993
3304
                "D-Bus method"
1994
 
                for c in tcp_server.clients:
 
3305
                for c in tcp_server.clients.values():
1995
3306
                    if c.dbus_object_path == object_path:
1996
 
                        tcp_server.clients.remove(c)
 
3307
                        del tcp_server.clients[c.name]
1997
3308
                        c.remove_from_connection()
1998
 
                        # Don't signal anything except ClientRemoved
 
3309
                        # Don't signal the disabling
1999
3310
                        c.disable(quiet=True)
2000
 
                        # Emit D-Bus signal
2001
 
                        self.ClientRemoved(object_path, c.name)
 
3311
                        # Emit D-Bus signal for removal
 
3312
                        self.client_removed_signal(c)
2002
3313
                        return
2003
3314
                raise KeyError(object_path)
2004
 
            
 
3315
 
2005
3316
            del _interface
2006
 
        
 
3317
 
 
3318
            @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
 
3319
                                 out_signature="a{oa{sa{sv}}}")
 
3320
            def GetManagedObjects(self):
 
3321
                """D-Bus method"""
 
3322
                return dbus.Dictionary(
 
3323
                    {client.dbus_object_path:
 
3324
                     dbus.Dictionary(
 
3325
                         {interface: client.GetAll(interface)
 
3326
                          for interface in
 
3327
                          client._get_all_interface_names()})
 
3328
                     for client in tcp_server.clients.values()})
 
3329
 
 
3330
            def client_added_signal(self, client):
 
3331
                """Send the new standard signal and the old signal"""
 
3332
                if use_dbus:
 
3333
                    # New standard signal
 
3334
                    self.InterfacesAdded(
 
3335
                        client.dbus_object_path,
 
3336
                        dbus.Dictionary(
 
3337
                            {interface: client.GetAll(interface)
 
3338
                             for interface in
 
3339
                             client._get_all_interface_names()}))
 
3340
                    # Old signal
 
3341
                    self.ClientAdded(client.dbus_object_path)
 
3342
 
 
3343
            def client_removed_signal(self, client):
 
3344
                """Send the new standard signal and the old signal"""
 
3345
                if use_dbus:
 
3346
                    # New standard signal
 
3347
                    self.InterfacesRemoved(
 
3348
                        client.dbus_object_path,
 
3349
                        client._get_all_interface_names())
 
3350
                    # Old signal
 
3351
                    self.ClientRemoved(client.dbus_object_path,
 
3352
                                       client.name)
 
3353
 
2007
3354
        mandos_dbus_service = MandosDBusService()
2008
 
    
 
3355
 
 
3356
    # Save modules to variables to exempt the modules from being
 
3357
    # unloaded before the function registered with atexit() is run.
 
3358
    mp = multiprocessing
 
3359
    wn = wnull
 
3360
 
2009
3361
    def cleanup():
2010
3362
        "Cleanup function; run on exit"
2011
 
        service.cleanup()
2012
 
        
 
3363
        if zeroconf:
 
3364
            service.cleanup()
 
3365
 
 
3366
        mp.active_children()
 
3367
        wn.close()
 
3368
        if not (tcp_server.clients or client_settings):
 
3369
            return
 
3370
 
 
3371
        # Store client before exiting. Secrets are encrypted with key
 
3372
        # based on what config file has. If config file is
 
3373
        # removed/edited, old secret will thus be unrecovable.
 
3374
        clients = {}
 
3375
        with PGPEngine() as pgp:
 
3376
            for client in tcp_server.clients.values():
 
3377
                key = client_settings[client.name]["secret"]
 
3378
                client.encrypted_secret = pgp.encrypt(client.secret,
 
3379
                                                      key)
 
3380
                client_dict = {}
 
3381
 
 
3382
                # A list of attributes that can not be pickled
 
3383
                # + secret.
 
3384
                exclude = {"bus", "changedstate", "secret",
 
3385
                           "checker", "server_settings"}
 
3386
                for name, typ in inspect.getmembers(dbus.service
 
3387
                                                    .Object):
 
3388
                    exclude.add(name)
 
3389
 
 
3390
                client_dict["encrypted_secret"] = (client
 
3391
                                                   .encrypted_secret)
 
3392
                for attr in client.client_structure:
 
3393
                    if attr not in exclude:
 
3394
                        client_dict[attr] = getattr(client, attr)
 
3395
 
 
3396
                clients[client.name] = client_dict
 
3397
                del client_settings[client.name]["secret"]
 
3398
 
 
3399
        try:
 
3400
            with tempfile.NamedTemporaryFile(
 
3401
                    mode='wb',
 
3402
                    suffix=".pickle",
 
3403
                    prefix='clients-',
 
3404
                    dir=os.path.dirname(stored_state_path),
 
3405
                    delete=False) as stored_state:
 
3406
                pickle.dump((clients, client_settings), stored_state,
 
3407
                            protocol=2)
 
3408
                tempname = stored_state.name
 
3409
            os.rename(tempname, stored_state_path)
 
3410
        except (IOError, OSError) as e:
 
3411
            if not debug:
 
3412
                try:
 
3413
                    os.remove(tempname)
 
3414
                except NameError:
 
3415
                    pass
 
3416
            if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):
 
3417
                logger.warning("Could not save persistent state: {}"
 
3418
                               .format(os.strerror(e.errno)))
 
3419
            else:
 
3420
                logger.warning("Could not save persistent state:",
 
3421
                               exc_info=e)
 
3422
                raise
 
3423
 
 
3424
        # Delete all clients, and settings from config
2013
3425
        while tcp_server.clients:
2014
 
            client = tcp_server.clients.pop()
 
3426
            name, client = tcp_server.clients.popitem()
2015
3427
            if use_dbus:
2016
3428
                client.remove_from_connection()
2017
 
            client.disable_hook = None
2018
 
            # Don't signal anything except ClientRemoved
 
3429
            # Don't signal the disabling
2019
3430
            client.disable(quiet=True)
 
3431
            # Emit D-Bus signal for removal
2020
3432
            if use_dbus:
2021
 
                # Emit D-Bus signal
2022
 
                mandos_dbus_service.ClientRemoved(client.dbus_object_path,
2023
 
                                                  client.name)
2024
 
    
 
3433
                mandos_dbus_service.client_removed_signal(client)
 
3434
        client_settings.clear()
 
3435
 
2025
3436
    atexit.register(cleanup)
2026
 
    
2027
 
    for client in tcp_server.clients:
 
3437
 
 
3438
    for client in tcp_server.clients.values():
2028
3439
        if use_dbus:
2029
 
            # Emit D-Bus signal
2030
 
            mandos_dbus_service.ClientAdded(client.dbus_object_path)
2031
 
        client.enable()
2032
 
    
 
3440
            # Emit D-Bus signal for adding
 
3441
            mandos_dbus_service.client_added_signal(client)
 
3442
        # Need to initiate checking of clients
 
3443
        if client.enabled:
 
3444
            client.init_checker()
 
3445
 
2033
3446
    tcp_server.enable()
2034
3447
    tcp_server.server_activate()
2035
 
    
 
3448
 
2036
3449
    # Find out what port we got
2037
 
    service.port = tcp_server.socket.getsockname()[1]
 
3450
    if zeroconf:
 
3451
        service.port = tcp_server.socket.getsockname()[1]
2038
3452
    if use_ipv6:
2039
3453
        logger.info("Now listening on address %r, port %d,"
2040
 
                    " flowinfo %d, scope_id %d"
2041
 
                    % tcp_server.socket.getsockname())
 
3454
                    " flowinfo %d, scope_id %d",
 
3455
                    *tcp_server.socket.getsockname())
2042
3456
    else:                       # IPv4
2043
 
        logger.info("Now listening on address %r, port %d"
2044
 
                    % tcp_server.socket.getsockname())
2045
 
    
2046
 
    #service.interface = tcp_server.socket.getsockname()[3]
2047
 
    
 
3457
        logger.info("Now listening on address %r, port %d",
 
3458
                    *tcp_server.socket.getsockname())
 
3459
 
 
3460
    # service.interface = tcp_server.socket.getsockname()[3]
 
3461
 
2048
3462
    try:
2049
 
        # From the Avahi example code
2050
 
        try:
2051
 
            service.activate()
2052
 
        except dbus.exceptions.DBusException as error:
2053
 
            logger.critical("DBusException: %s", error)
2054
 
            cleanup()
2055
 
            sys.exit(1)
2056
 
        # End of Avahi example code
2057
 
        
2058
 
        gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,
2059
 
                             lambda *args, **kwargs:
2060
 
                             (tcp_server.handle_request
2061
 
                              (*args[2:], **kwargs) or True))
2062
 
        
 
3463
        if zeroconf:
 
3464
            # From the Avahi example code
 
3465
            try:
 
3466
                service.activate()
 
3467
            except dbus.exceptions.DBusException as error:
 
3468
                logger.critical("D-Bus Exception", exc_info=error)
 
3469
                cleanup()
 
3470
                sys.exit(1)
 
3471
            # End of Avahi example code
 
3472
 
 
3473
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
 
3474
                          lambda *args, **kwargs:
 
3475
                          (tcp_server.handle_request
 
3476
                           (*args[2:], **kwargs) or True))
 
3477
 
2063
3478
        logger.debug("Starting main loop")
2064
3479
        main_loop.run()
2065
3480
    except AvahiError as error:
2066
 
        logger.critical("AvahiError: %s", error)
 
3481
        logger.critical("Avahi Error", exc_info=error)
2067
3482
        cleanup()
2068
3483
        sys.exit(1)
2069
3484
    except KeyboardInterrupt:
2074
3489
    # Must run before the D-Bus bus name gets deregistered
2075
3490
    cleanup()
2076
3491
 
 
3492
 
2077
3493
if __name__ == '__main__':
2078
3494
    main()