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  • Committer: Teddy Hogeborn
  • Date: 2016-03-19 03:48:56 UTC
  • Revision ID: teddy@recompile.se-20160319034856-d8rox0kdxekgr03g
Server: Make persistent state directory mode u=rwx,go=

The Makefile target "install-server" creates the server persistent
state directory /var/lib/mandos as mode u=rwx,go= (0700).  Make this
also the case for the Debian package (unless overridden by
dpkg-statoverride).

* debian/mandos.postinst (configure): Fix state directory permissions,
  but only if not listed by "dpkg-statoverride".

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#!/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 © 2008-2018 Teddy Hogeborn
15
 
# Copyright © 2008-2018 Björn Påhlsson
16
 
#
17
 
# This file is part of Mandos.
18
 
#
19
 
# Mandos is free software: you can redistribute it and/or modify it
20
 
# under the terms of the GNU General Public License as published by
 
14
# Copyright © 2008-2016 Teddy Hogeborn
 
15
# Copyright © 2008-2016 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
21
19
# the Free Software Foundation, either version 3 of the License, or
22
20
# (at your option) any later version.
23
21
#
24
 
#     Mandos is distributed in the hope that it will be useful, but
25
 
#     WITHOUT ANY WARRANTY; without even the implied warranty of
 
22
#     This program is distributed in the hope that it will be useful,
 
23
#     but WITHOUT ANY WARRANTY; without even the implied warranty of
26
24
#     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
27
25
#     GNU General Public License for more details.
28
 
#
 
26
29
27
# You should have received a copy of the GNU General Public License
30
 
# along with Mandos.  If not, see <http://www.gnu.org/licenses/>.
31
 
#
 
28
# along with this program.  If not, see
 
29
# <http://www.gnu.org/licenses/>.
 
30
32
31
# Contact the authors at <mandos@recompile.se>.
33
 
#
 
32
34
33
 
35
34
from __future__ import (division, absolute_import, print_function,
36
35
                        unicode_literals)
87
86
import xml.dom.minidom
88
87
import inspect
89
88
 
90
 
# Try to find the value of SO_BINDTODEVICE:
91
89
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:
94
90
    SO_BINDTODEVICE = socket.SO_BINDTODEVICE
95
91
except AttributeError:
96
92
    try:
97
 
        # This is where SO_BINDTODEVICE was up to and including Python
98
 
        # 2.6, and also 3.2:
99
93
        from IN import SO_BINDTODEVICE
100
94
    except ImportError:
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
 
95
        SO_BINDTODEVICE = None
114
96
 
115
97
if sys.version_info.major == 2:
116
98
    str = unicode
117
99
 
118
 
version = "1.7.19"
 
100
version = "1.7.6"
119
101
stored_state_file = "clients.pickle"
120
102
 
121
103
logger = logging.getLogger()
125
107
    if_nametoindex = ctypes.cdll.LoadLibrary(
126
108
        ctypes.util.find_library("c")).if_nametoindex
127
109
except (OSError, AttributeError):
128
 
 
 
110
    
129
111
    def if_nametoindex(interface):
130
112
        "Get an interface index the hard way, i.e. using fcntl()"
131
113
        SIOCGIFINDEX = 0x8933  # From /usr/include/linux/sockios.h
154
136
 
155
137
def initlogger(debug, level=logging.WARNING):
156
138
    """init logger and add loglevel"""
157
 
 
 
139
    
158
140
    global syslogger
159
141
    syslogger = (logging.handlers.SysLogHandler(
160
 
        facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
 
        address="/dev/log"))
 
142
        facility = logging.handlers.SysLogHandler.LOG_DAEMON,
 
143
        address = "/dev/log"))
162
144
    syslogger.setFormatter(logging.Formatter
163
145
                           ('Mandos [%(process)d]: %(levelname)s:'
164
146
                            ' %(message)s'))
165
147
    logger.addHandler(syslogger)
166
 
 
 
148
    
167
149
    if debug:
168
150
        console = logging.StreamHandler()
169
151
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
181
163
 
182
164
class PGPEngine(object):
183
165
    """A simple class for OpenPGP symmetric encryption & decryption"""
184
 
 
 
166
    
185
167
    def __init__(self):
186
168
        self.tempdir = tempfile.mkdtemp(prefix="mandos-")
187
169
        self.gpg = "gpg"
198
180
        self.gnupgargs = ['--batch',
199
181
                          '--homedir', self.tempdir,
200
182
                          '--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
 
 
 
183
                          '--quiet',
 
184
                          '--no-use-agent']
 
185
    
206
186
    def __enter__(self):
207
187
        return self
208
 
 
 
188
    
209
189
    def __exit__(self, exc_type, exc_value, traceback):
210
190
        self._cleanup()
211
191
        return False
212
 
 
 
192
    
213
193
    def __del__(self):
214
194
        self._cleanup()
215
 
 
 
195
    
216
196
    def _cleanup(self):
217
197
        if self.tempdir is not None:
218
198
            # Delete contents of tempdir
219
199
            for root, dirs, files in os.walk(self.tempdir,
220
 
                                             topdown=False):
 
200
                                             topdown = False):
221
201
                for filename in files:
222
202
                    os.remove(os.path.join(root, filename))
223
203
                for dirname in dirs:
225
205
            # Remove tempdir
226
206
            os.rmdir(self.tempdir)
227
207
            self.tempdir = None
228
 
 
 
208
    
229
209
    def password_encode(self, password):
230
210
        # Passphrase can not be empty and can not contain newlines or
231
211
        # NUL bytes.  So we prefix it and hex encode it.
236
216
                       .replace(b"\n", b"\\n")
237
217
                       .replace(b"\0", b"\\x00"))
238
218
        return encoded
239
 
 
 
219
    
240
220
    def encrypt(self, data, password):
241
221
        passphrase = self.password_encode(password)
242
222
        with tempfile.NamedTemporaryFile(
247
227
                                     '--passphrase-file',
248
228
                                     passfile.name]
249
229
                                    + self.gnupgargs,
250
 
                                    stdin=subprocess.PIPE,
251
 
                                    stdout=subprocess.PIPE,
252
 
                                    stderr=subprocess.PIPE)
253
 
            ciphertext, err = proc.communicate(input=data)
 
230
                                    stdin = subprocess.PIPE,
 
231
                                    stdout = subprocess.PIPE,
 
232
                                    stderr = subprocess.PIPE)
 
233
            ciphertext, err = proc.communicate(input = data)
254
234
        if proc.returncode != 0:
255
235
            raise PGPError(err)
256
236
        return ciphertext
257
 
 
 
237
    
258
238
    def decrypt(self, data, password):
259
239
        passphrase = self.password_encode(password)
260
240
        with tempfile.NamedTemporaryFile(
261
 
                dir=self.tempdir) as passfile:
 
241
                dir = self.tempdir) as passfile:
262
242
            passfile.write(passphrase)
263
243
            passfile.flush()
264
244
            proc = subprocess.Popen([self.gpg, '--decrypt',
265
245
                                     '--passphrase-file',
266
246
                                     passfile.name]
267
247
                                    + self.gnupgargs,
268
 
                                    stdin=subprocess.PIPE,
269
 
                                    stdout=subprocess.PIPE,
270
 
                                    stderr=subprocess.PIPE)
271
 
            decrypted_plaintext, err = proc.communicate(input=data)
 
248
                                    stdin = subprocess.PIPE,
 
249
                                    stdout = subprocess.PIPE,
 
250
                                    stderr = subprocess.PIPE)
 
251
            decrypted_plaintext, err = proc.communicate(input = data)
272
252
        if proc.returncode != 0:
273
253
            raise PGPError(err)
274
254
        return decrypted_plaintext
275
255
 
276
 
 
277
256
# Pretend that we have an Avahi module
278
257
class Avahi(object):
279
258
    """This isn't so much a class as it is a module-like namespace.
280
259
    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
 
260
    IF_UNSPEC = -1              # avahi-common/address.h
 
261
    PROTO_UNSPEC = -1           # avahi-common/address.h
 
262
    PROTO_INET = 0              # avahi-common/address.h
 
263
    PROTO_INET6 = 1             # avahi-common/address.h
285
264
    DBUS_NAME = "org.freedesktop.Avahi"
286
265
    DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"
287
266
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
267
    DBUS_PATH_SERVER = "/"
289
 
 
290
268
    def string_array_to_txt_array(self, t):
291
269
        return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
270
                           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
 
271
    ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h
 
272
    ENTRY_GROUP_COLLISION = 3   # avahi-common/defs.h
 
273
    ENTRY_GROUP_FAILURE = 4     # avahi-common/defs.h
 
274
    SERVER_INVALID = 0          # avahi-common/defs.h
 
275
    SERVER_REGISTERING = 1      # avahi-common/defs.h
 
276
    SERVER_RUNNING = 2          # avahi-common/defs.h
 
277
    SERVER_COLLISION = 3        # avahi-common/defs.h
 
278
    SERVER_FAILURE = 4          # avahi-common/defs.h
301
279
avahi = Avahi()
302
280
 
303
 
 
304
281
class AvahiError(Exception):
305
282
    def __init__(self, value, *args, **kwargs):
306
283
        self.value = value
318
295
 
319
296
class AvahiService(object):
320
297
    """An Avahi (Zeroconf) service.
321
 
 
 
298
    
322
299
    Attributes:
323
300
    interface: integer; avahi.IF_UNSPEC or an interface index.
324
301
               Used to optionally bind to the specified interface.
336
313
    server: D-Bus Server
337
314
    bus: dbus.SystemBus()
338
315
    """
339
 
 
 
316
    
340
317
    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):
 
318
                 interface = avahi.IF_UNSPEC,
 
319
                 name = None,
 
320
                 servicetype = None,
 
321
                 port = None,
 
322
                 TXT = None,
 
323
                 domain = "",
 
324
                 host = "",
 
325
                 max_renames = 32768,
 
326
                 protocol = avahi.PROTO_UNSPEC,
 
327
                 bus = None):
351
328
        self.interface = interface
352
329
        self.name = name
353
330
        self.type = servicetype
362
339
        self.server = None
363
340
        self.bus = bus
364
341
        self.entry_group_state_changed_match = None
365
 
 
 
342
    
366
343
    def rename(self, remove=True):
367
344
        """Derived from the Avahi example code"""
368
345
        if self.rename_count >= self.max_renames:
388
365
                logger.critical("D-Bus Exception", exc_info=error)
389
366
                self.cleanup()
390
367
                os._exit(1)
391
 
 
 
368
    
392
369
    def remove(self):
393
370
        """Derived from the Avahi example code"""
394
371
        if self.entry_group_state_changed_match is not None:
396
373
            self.entry_group_state_changed_match = None
397
374
        if self.group is not None:
398
375
            self.group.Reset()
399
 
 
 
376
    
400
377
    def add(self):
401
378
        """Derived from the Avahi example code"""
402
379
        self.remove()
419
396
            dbus.UInt16(self.port),
420
397
            avahi.string_array_to_txt_array(self.TXT))
421
398
        self.group.Commit()
422
 
 
 
399
    
423
400
    def entry_group_state_changed(self, state, error):
424
401
        """Derived from the Avahi example code"""
425
402
        logger.debug("Avahi entry group state change: %i", state)
426
 
 
 
403
        
427
404
        if state == avahi.ENTRY_GROUP_ESTABLISHED:
428
405
            logger.debug("Zeroconf service established.")
429
406
        elif state == avahi.ENTRY_GROUP_COLLISION:
433
410
            logger.critical("Avahi: Error in group state changed %s",
434
411
                            str(error))
435
412
            raise AvahiGroupError("State changed: {!s}".format(error))
436
 
 
 
413
    
437
414
    def cleanup(self):
438
415
        """Derived from the Avahi example code"""
439
416
        if self.group is not None:
444
421
                pass
445
422
            self.group = None
446
423
        self.remove()
447
 
 
 
424
    
448
425
    def server_state_changed(self, state, error=None):
449
426
        """Derived from the Avahi example code"""
450
427
        logger.debug("Avahi server state change: %i", state)
479
456
                logger.debug("Unknown state: %r", state)
480
457
            else:
481
458
                logger.debug("Unknown state: %r: %r", state, error)
482
 
 
 
459
    
483
460
    def activate(self):
484
461
        """Derived from the Avahi example code"""
485
462
        if self.server is None:
496
473
class AvahiServiceToSyslog(AvahiService):
497
474
    def rename(self, *args, **kwargs):
498
475
        """Add the new name to the syslog messages"""
499
 
        ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
 
476
        ret = AvahiService.rename(self, *args, **kwargs)
500
477
        syslogger.setFormatter(logging.Formatter(
501
478
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
502
479
            .format(self.name)))
503
480
        return ret
504
481
 
505
 
 
506
482
# Pretend that we have a GnuTLS module
507
483
class GnuTLS(object):
508
484
    """This isn't so much a class as it is a module-like namespace.
509
485
    It is instantiated once, and simulates having a GnuTLS module."""
510
 
 
511
 
    library = ctypes.util.find_library("gnutls")
512
 
    if library is None:
513
 
        library = ctypes.util.find_library("gnutls-deb0")
514
 
    _library = ctypes.cdll.LoadLibrary(library)
515
 
    del library
 
486
    
 
487
    _library = ctypes.cdll.LoadLibrary(
 
488
        ctypes.util.find_library("gnutls"))
516
489
    _need_version = b"3.3.0"
517
 
 
518
490
    def __init__(self):
519
 
        # Need to use "self" here, since this method is called before
520
 
        # the assignment to the "gnutls" global variable happens.
521
 
        if self.check_version(self._need_version) is None:
522
 
            raise self.Error("Needs GnuTLS {} or later"
523
 
                             .format(self._need_version))
524
 
 
 
491
        # Need to use class name "GnuTLS" here, since this method is
 
492
        # called before the assignment to the "gnutls" global variable
 
493
        # happens.
 
494
        if GnuTLS.check_version(self._need_version) is None:
 
495
            raise GnuTLS.Error("Needs GnuTLS {} or later"
 
496
                               .format(self._need_version))
 
497
    
525
498
    # Unless otherwise indicated, the constants and types below are
526
499
    # all from the gnutls/gnutls.h C header file.
527
 
 
 
500
    
528
501
    # Constants
529
502
    E_SUCCESS = 0
530
503
    E_INTERRUPTED = -52
535
508
    CRD_CERTIFICATE = 1
536
509
    E_NO_CERTIFICATE_FOUND = -49
537
510
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
538
 
 
 
511
    
539
512
    # Types
540
513
    class session_int(ctypes.Structure):
541
514
        _fields_ = []
542
515
    session_t = ctypes.POINTER(session_int)
543
 
 
544
516
    class certificate_credentials_st(ctypes.Structure):
545
517
        _fields_ = []
546
518
    certificate_credentials_t = ctypes.POINTER(
547
519
        certificate_credentials_st)
548
520
    certificate_type_t = ctypes.c_int
549
 
 
550
521
    class datum_t(ctypes.Structure):
551
522
        _fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
523
                    ('size', ctypes.c_uint)]
553
 
 
554
524
    class openpgp_crt_int(ctypes.Structure):
555
525
        _fields_ = []
556
526
    openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
557
 
    openpgp_crt_fmt_t = ctypes.c_int  # gnutls/openpgp.h
 
527
    openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h
558
528
    log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
529
    credentials_type_t = ctypes.c_int
560
530
    transport_ptr_t = ctypes.c_void_p
561
531
    close_request_t = ctypes.c_int
562
 
 
 
532
    
563
533
    # Exceptions
564
534
    class Error(Exception):
565
535
        # We need to use the class name "GnuTLS" here, since this
566
536
        # exception might be raised from within GnuTLS.__init__,
567
537
        # which is called before the assignment to the "gnutls"
568
538
        # global variable has happened.
569
 
        def __init__(self, message=None, code=None, args=()):
 
539
        def __init__(self, message = None, code = None, args=()):
570
540
            # Default usage is by a message string, but if a return
571
541
            # code is passed, convert it to a string with
572
542
            # gnutls.strerror()
575
545
                message = GnuTLS.strerror(code)
576
546
            return super(GnuTLS.Error, self).__init__(
577
547
                message, *args)
578
 
 
 
548
    
579
549
    class CertificateSecurityError(Error):
580
550
        pass
581
 
 
 
551
    
582
552
    # Classes
583
553
    class Credentials(object):
584
554
        def __init__(self):
586
556
            gnutls.certificate_allocate_credentials(
587
557
                ctypes.byref(self._c_object))
588
558
            self.type = gnutls.CRD_CERTIFICATE
589
 
 
 
559
        
590
560
        def __del__(self):
591
561
            gnutls.certificate_free_credentials(self._c_object)
592
 
 
 
562
    
593
563
    class ClientSession(object):
594
 
        def __init__(self, socket, credentials=None):
 
564
        def __init__(self, socket, credentials = None):
595
565
            self._c_object = gnutls.session_t()
596
566
            gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
567
            gnutls.set_default_priority(self._c_object)
605
575
                                   ctypes.cast(credentials._c_object,
606
576
                                               ctypes.c_void_p))
607
577
            self.credentials = credentials
608
 
 
 
578
        
609
579
        def __del__(self):
610
580
            gnutls.deinit(self._c_object)
611
 
 
 
581
        
612
582
        def handshake(self):
613
583
            return gnutls.handshake(self._c_object)
614
 
 
 
584
        
615
585
        def send(self, data):
616
586
            data = bytes(data)
617
587
            data_len = len(data)
619
589
                data_len -= gnutls.record_send(self._c_object,
620
590
                                               data[-data_len:],
621
591
                                               data_len)
622
 
 
 
592
        
623
593
        def bye(self):
624
594
            return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
625
 
 
 
595
    
626
596
    # Error handling functions
627
597
    def _error_code(result):
628
598
        """A function to raise exceptions on errors, suitable
630
600
        if result >= 0:
631
601
            return result
632
602
        if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
 
            raise gnutls.CertificateSecurityError(code=result)
634
 
        raise gnutls.Error(code=result)
635
 
 
 
603
            raise gnutls.CertificateSecurityError(code = result)
 
604
        raise gnutls.Error(code = result)
 
605
    
636
606
    def _retry_on_error(result, func, arguments):
637
607
        """A function to retry on some errors, suitable
638
608
        for the 'errcheck' attribute on ctypes functions"""
641
611
                return _error_code(result)
642
612
            result = func(*arguments)
643
613
        return result
644
 
 
 
614
    
645
615
    # Unless otherwise indicated, the function declarations below are
646
616
    # all from the gnutls/gnutls.h C header file.
647
 
 
 
617
    
648
618
    # Functions
649
619
    priority_set_direct = _library.gnutls_priority_set_direct
650
620
    priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
651
621
                                    ctypes.POINTER(ctypes.c_char_p)]
652
622
    priority_set_direct.restype = _error_code
653
 
 
 
623
    
654
624
    init = _library.gnutls_init
655
625
    init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
656
626
    init.restype = _error_code
657
 
 
 
627
    
658
628
    set_default_priority = _library.gnutls_set_default_priority
659
629
    set_default_priority.argtypes = [session_t]
660
630
    set_default_priority.restype = _error_code
661
 
 
 
631
    
662
632
    record_send = _library.gnutls_record_send
663
633
    record_send.argtypes = [session_t, ctypes.c_void_p,
664
634
                            ctypes.c_size_t]
665
635
    record_send.restype = ctypes.c_ssize_t
666
636
    record_send.errcheck = _retry_on_error
667
 
 
 
637
    
668
638
    certificate_allocate_credentials = (
669
639
        _library.gnutls_certificate_allocate_credentials)
670
640
    certificate_allocate_credentials.argtypes = [
671
641
        ctypes.POINTER(certificate_credentials_t)]
672
642
    certificate_allocate_credentials.restype = _error_code
673
 
 
 
643
    
674
644
    certificate_free_credentials = (
675
645
        _library.gnutls_certificate_free_credentials)
676
 
    certificate_free_credentials.argtypes = [
677
 
        certificate_credentials_t]
 
646
    certificate_free_credentials.argtypes = [certificate_credentials_t]
678
647
    certificate_free_credentials.restype = None
679
 
 
 
648
    
680
649
    handshake_set_private_extensions = (
681
650
        _library.gnutls_handshake_set_private_extensions)
682
651
    handshake_set_private_extensions.argtypes = [session_t,
683
652
                                                 ctypes.c_int]
684
653
    handshake_set_private_extensions.restype = None
685
 
 
 
654
    
686
655
    credentials_set = _library.gnutls_credentials_set
687
656
    credentials_set.argtypes = [session_t, credentials_type_t,
688
657
                                ctypes.c_void_p]
689
658
    credentials_set.restype = _error_code
690
 
 
 
659
    
691
660
    strerror = _library.gnutls_strerror
692
661
    strerror.argtypes = [ctypes.c_int]
693
662
    strerror.restype = ctypes.c_char_p
694
 
 
 
663
    
695
664
    certificate_type_get = _library.gnutls_certificate_type_get
696
665
    certificate_type_get.argtypes = [session_t]
697
666
    certificate_type_get.restype = _error_code
698
 
 
 
667
    
699
668
    certificate_get_peers = _library.gnutls_certificate_get_peers
700
669
    certificate_get_peers.argtypes = [session_t,
701
670
                                      ctypes.POINTER(ctypes.c_uint)]
702
671
    certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
 
 
 
672
    
704
673
    global_set_log_level = _library.gnutls_global_set_log_level
705
674
    global_set_log_level.argtypes = [ctypes.c_int]
706
675
    global_set_log_level.restype = None
707
 
 
 
676
    
708
677
    global_set_log_function = _library.gnutls_global_set_log_function
709
678
    global_set_log_function.argtypes = [log_func]
710
679
    global_set_log_function.restype = None
711
 
 
 
680
    
712
681
    deinit = _library.gnutls_deinit
713
682
    deinit.argtypes = [session_t]
714
683
    deinit.restype = None
715
 
 
 
684
    
716
685
    handshake = _library.gnutls_handshake
717
686
    handshake.argtypes = [session_t]
718
687
    handshake.restype = _error_code
719
688
    handshake.errcheck = _retry_on_error
720
 
 
 
689
    
721
690
    transport_set_ptr = _library.gnutls_transport_set_ptr
722
691
    transport_set_ptr.argtypes = [session_t, transport_ptr_t]
723
692
    transport_set_ptr.restype = None
724
 
 
 
693
    
725
694
    bye = _library.gnutls_bye
726
695
    bye.argtypes = [session_t, close_request_t]
727
696
    bye.restype = _error_code
728
697
    bye.errcheck = _retry_on_error
729
 
 
 
698
    
730
699
    check_version = _library.gnutls_check_version
731
700
    check_version.argtypes = [ctypes.c_char_p]
732
701
    check_version.restype = ctypes.c_char_p
733
 
 
 
702
    
734
703
    # All the function declarations below are from gnutls/openpgp.h
735
 
 
 
704
    
736
705
    openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
706
    openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
707
    openpgp_crt_init.restype = _error_code
739
 
 
 
708
    
740
709
    openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
710
    openpgp_crt_import.argtypes = [openpgp_crt_t,
742
711
                                   ctypes.POINTER(datum_t),
743
712
                                   openpgp_crt_fmt_t]
744
713
    openpgp_crt_import.restype = _error_code
745
 
 
 
714
    
746
715
    openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
716
    openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
717
                                        ctypes.POINTER(ctypes.c_uint)]
749
718
    openpgp_crt_verify_self.restype = _error_code
750
 
 
 
719
    
751
720
    openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
721
    openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
722
    openpgp_crt_deinit.restype = None
754
 
 
 
723
    
755
724
    openpgp_crt_get_fingerprint = (
756
725
        _library.gnutls_openpgp_crt_get_fingerprint)
757
726
    openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
759
728
                                            ctypes.POINTER(
760
729
                                                ctypes.c_size_t)]
761
730
    openpgp_crt_get_fingerprint.restype = _error_code
762
 
 
 
731
    
763
732
    # Remove non-public functions
764
733
    del _error_code, _retry_on_error
765
734
# Create the global "gnutls" object, simulating a module
766
735
gnutls = GnuTLS()
767
736
 
768
 
 
769
737
def call_pipe(connection,       # : multiprocessing.Connection
770
738
              func, *args, **kwargs):
771
739
    """This function is meant to be called by multiprocessing.Process
772
 
 
 
740
    
773
741
    This function runs func(*args, **kwargs), and writes the resulting
774
742
    return value on the provided multiprocessing.Connection.
775
743
    """
776
744
    connection.send(func(*args, **kwargs))
777
745
    connection.close()
778
746
 
779
 
 
780
747
class Client(object):
781
748
    """A representation of a client host served by this server.
782
 
 
 
749
    
783
750
    Attributes:
784
751
    approved:   bool(); 'None' if not yet approved/disapproved
785
752
    approval_delay: datetime.timedelta(); Time to wait for approval
822
789
                disabled, or None
823
790
    server_settings: The server_settings dict from main()
824
791
    """
825
 
 
 
792
    
826
793
    runtime_expansions = ("approval_delay", "approval_duration",
827
794
                          "created", "enabled", "expires",
828
795
                          "fingerprint", "host", "interval",
839
806
        "approved_by_default": "True",
840
807
        "enabled": "True",
841
808
    }
842
 
 
 
809
    
843
810
    @staticmethod
844
811
    def config_parser(config):
845
812
        """Construct a new dict of client settings of this form:
852
819
        for client_name in config.sections():
853
820
            section = dict(config.items(client_name))
854
821
            client = settings[client_name] = {}
855
 
 
 
822
            
856
823
            client["host"] = section["host"]
857
824
            # Reformat values from string types to Python types
858
825
            client["approved_by_default"] = config.getboolean(
859
826
                client_name, "approved_by_default")
860
827
            client["enabled"] = config.getboolean(client_name,
861
828
                                                  "enabled")
862
 
 
 
829
            
863
830
            # Uppercase and remove spaces from fingerprint for later
864
831
            # comparison purposes with return value from the
865
832
            # fingerprint() function
889
856
            client["last_approval_request"] = None
890
857
            client["last_checked_ok"] = None
891
858
            client["last_checker_status"] = -2
892
 
 
 
859
        
893
860
        return settings
894
 
 
895
 
    def __init__(self, settings, name=None, server_settings=None):
 
861
    
 
862
    def __init__(self, settings, name = None, server_settings=None):
896
863
        self.name = name
897
864
        if server_settings is None:
898
865
            server_settings = {}
900
867
        # adding all client settings
901
868
        for setting, value in settings.items():
902
869
            setattr(self, setting, value)
903
 
 
 
870
        
904
871
        if self.enabled:
905
872
            if not hasattr(self, "last_enabled"):
906
873
                self.last_enabled = datetime.datetime.utcnow()
910
877
        else:
911
878
            self.last_enabled = None
912
879
            self.expires = None
913
 
 
 
880
        
914
881
        logger.debug("Creating client %r", self.name)
915
882
        logger.debug("  Fingerprint: %s", self.fingerprint)
916
883
        self.created = settings.get("created",
917
884
                                    datetime.datetime.utcnow())
918
 
 
 
885
        
919
886
        # attributes specific for this server instance
920
887
        self.checker = None
921
888
        self.checker_initiator_tag = None
930
897
                                 for attr in self.__dict__.keys()
931
898
                                 if not attr.startswith("_")]
932
899
        self.client_structure.append("client_structure")
933
 
 
 
900
        
934
901
        for name, t in inspect.getmembers(
935
902
                type(self), lambda obj: isinstance(obj, property)):
936
903
            if not name.startswith("_"):
937
904
                self.client_structure.append(name)
938
 
 
 
905
    
939
906
    # Send notice to process children that client state has changed
940
907
    def send_changedstate(self):
941
908
        with self.changedstate:
942
909
            self.changedstate.notify_all()
943
 
 
 
910
    
944
911
    def enable(self):
945
912
        """Start this client's checker and timeout hooks"""
946
913
        if getattr(self, "enabled", False):
951
918
        self.last_enabled = datetime.datetime.utcnow()
952
919
        self.init_checker()
953
920
        self.send_changedstate()
954
 
 
 
921
    
955
922
    def disable(self, quiet=True):
956
923
        """Disable this client."""
957
924
        if not getattr(self, "enabled", False):
971
938
            self.send_changedstate()
972
939
        # Do not run this again if called by a GLib.timeout_add
973
940
        return False
974
 
 
 
941
    
975
942
    def __del__(self):
976
943
        self.disable()
977
 
 
 
944
    
978
945
    def init_checker(self):
979
946
        # Schedule a new checker to be started an 'interval' from now,
980
947
        # and every interval from then on.
990
957
            int(self.timeout.total_seconds() * 1000), self.disable)
991
958
        # Also start a new checker *right now*.
992
959
        self.start_checker()
993
 
 
 
960
    
994
961
    def checker_callback(self, source, condition, connection,
995
962
                         command):
996
963
        """The checker has completed, so take appropriate actions."""
999
966
        # Read return code from connection (see call_pipe)
1000
967
        returncode = connection.recv()
1001
968
        connection.close()
1002
 
 
 
969
        
1003
970
        if returncode >= 0:
1004
971
            self.last_checker_status = returncode
1005
972
            self.last_checker_signal = None
1015
982
            logger.warning("Checker for %(name)s crashed?",
1016
983
                           vars(self))
1017
984
        return False
1018
 
 
 
985
    
1019
986
    def checked_ok(self):
1020
987
        """Assert that the client has been seen, alive and well."""
1021
988
        self.last_checked_ok = datetime.datetime.utcnow()
1022
989
        self.last_checker_status = 0
1023
990
        self.last_checker_signal = None
1024
991
        self.bump_timeout()
1025
 
 
 
992
    
1026
993
    def bump_timeout(self, timeout=None):
1027
994
        """Bump up the timeout for this client."""
1028
995
        if timeout is None:
1034
1001
            self.disable_initiator_tag = GLib.timeout_add(
1035
1002
                int(timeout.total_seconds() * 1000), self.disable)
1036
1003
            self.expires = datetime.datetime.utcnow() + timeout
1037
 
 
 
1004
    
1038
1005
    def need_approval(self):
1039
1006
        self.last_approval_request = datetime.datetime.utcnow()
1040
 
 
 
1007
    
1041
1008
    def start_checker(self):
1042
1009
        """Start a new checker subprocess if one is not running.
1043
 
 
 
1010
        
1044
1011
        If a checker already exists, leave it running and do
1045
1012
        nothing."""
1046
1013
        # The reason for not killing a running checker is that if we
1051
1018
        # checkers alone, the checker would have to take more time
1052
1019
        # than 'timeout' for the client to be disabled, which is as it
1053
1020
        # should be.
1054
 
 
 
1021
        
1055
1022
        if self.checker is not None and not self.checker.is_alive():
1056
1023
            logger.warning("Checker was not alive; joining")
1057
1024
            self.checker.join()
1061
1028
            # Escape attributes for the shell
1062
1029
            escaped_attrs = {
1063
1030
                attr: re.escape(str(getattr(self, attr)))
1064
 
                for attr in self.runtime_expansions}
 
1031
                for attr in self.runtime_expansions }
1065
1032
            try:
1066
1033
                command = self.checker_command % escaped_attrs
1067
1034
            except TypeError as error:
1079
1046
            # The exception is when not debugging but nevertheless
1080
1047
            # running in the foreground; use the previously
1081
1048
            # created wnull.
1082
 
            popen_args = {"close_fds": True,
1083
 
                          "shell": True,
1084
 
                          "cwd": "/"}
 
1049
            popen_args = { "close_fds": True,
 
1050
                           "shell": True,
 
1051
                           "cwd": "/" }
1085
1052
            if (not self.server_settings["debug"]
1086
1053
                and self.server_settings["foreground"]):
1087
1054
                popen_args.update({"stdout": wnull,
1088
 
                                   "stderr": wnull})
1089
 
            pipe = multiprocessing.Pipe(duplex=False)
 
1055
                                   "stderr": wnull })
 
1056
            pipe = multiprocessing.Pipe(duplex = False)
1090
1057
            self.checker = multiprocessing.Process(
1091
 
                target=call_pipe,
1092
 
                args=(pipe[1], subprocess.call, command),
1093
 
                kwargs=popen_args)
 
1058
                target = call_pipe,
 
1059
                args = (pipe[1], subprocess.call, command),
 
1060
                kwargs = popen_args)
1094
1061
            self.checker.start()
1095
1062
            self.checker_callback_tag = GLib.io_add_watch(
1096
1063
                pipe[0].fileno(), GLib.IO_IN,
1097
1064
                self.checker_callback, pipe[0], command)
1098
1065
        # Re-run this periodically if run by GLib.timeout_add
1099
1066
        return True
1100
 
 
 
1067
    
1101
1068
    def stop_checker(self):
1102
1069
        """Force the checker process, if any, to stop."""
1103
1070
        if self.checker_callback_tag:
1116
1083
                          byte_arrays=False):
1117
1084
    """Decorators for marking methods of a DBusObjectWithProperties to
1118
1085
    become properties on the D-Bus.
1119
 
 
 
1086
    
1120
1087
    The decorated method will be called with no arguments by "Get"
1121
1088
    and with one argument by "Set".
1122
 
 
 
1089
    
1123
1090
    The parameters, where they are supported, are the same as
1124
1091
    dbus.service.method, except there is only "signature", since the
1125
1092
    type from Get() and the type sent to Set() is the same.
1129
1096
    if byte_arrays and signature != "ay":
1130
1097
        raise ValueError("Byte arrays not supported for non-'ay'"
1131
1098
                         " signature {!r}".format(signature))
1132
 
 
 
1099
    
1133
1100
    def decorator(func):
1134
1101
        func._dbus_is_property = True
1135
1102
        func._dbus_interface = dbus_interface
1138
1105
        func._dbus_name = func.__name__
1139
1106
        if func._dbus_name.endswith("_dbus_property"):
1140
1107
            func._dbus_name = func._dbus_name[:-14]
1141
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays}
 
1108
        func._dbus_get_args_options = {'byte_arrays': byte_arrays }
1142
1109
        return func
1143
 
 
 
1110
    
1144
1111
    return decorator
1145
1112
 
1146
1113
 
1147
1114
def dbus_interface_annotations(dbus_interface):
1148
1115
    """Decorator for marking functions returning interface annotations
1149
 
 
 
1116
    
1150
1117
    Usage:
1151
 
 
 
1118
    
1152
1119
    @dbus_interface_annotations("org.example.Interface")
1153
1120
    def _foo(self):  # Function name does not matter
1154
1121
        return {"org.freedesktop.DBus.Deprecated": "true",
1155
1122
                "org.freedesktop.DBus.Property.EmitsChangedSignal":
1156
1123
                    "false"}
1157
1124
    """
1158
 
 
 
1125
    
1159
1126
    def decorator(func):
1160
1127
        func._dbus_is_interface = True
1161
1128
        func._dbus_interface = dbus_interface
1162
1129
        func._dbus_name = dbus_interface
1163
1130
        return func
1164
 
 
 
1131
    
1165
1132
    return decorator
1166
1133
 
1167
1134
 
1168
1135
def dbus_annotations(annotations):
1169
1136
    """Decorator to annotate D-Bus methods, signals or properties
1170
1137
    Usage:
1171
 
 
 
1138
    
1172
1139
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",
1173
1140
                       "org.freedesktop.DBus.Property."
1174
1141
                       "EmitsChangedSignal": "false"})
1176
1143
                           access="r")
1177
1144
    def Property_dbus_property(self):
1178
1145
        return dbus.Boolean(False)
1179
 
 
 
1146
    
1180
1147
    See also the DBusObjectWithAnnotations class.
1181
1148
    """
1182
 
 
 
1149
    
1183
1150
    def decorator(func):
1184
1151
        func._dbus_annotations = annotations
1185
1152
        return func
1186
 
 
 
1153
    
1187
1154
    return decorator
1188
1155
 
1189
1156
 
1207
1174
 
1208
1175
class DBusObjectWithAnnotations(dbus.service.Object):
1209
1176
    """A D-Bus object with annotations.
1210
 
 
 
1177
    
1211
1178
    Classes inheriting from this can use the dbus_annotations
1212
1179
    decorator to add annotations to methods or signals.
1213
1180
    """
1214
 
 
 
1181
    
1215
1182
    @staticmethod
1216
1183
    def _is_dbus_thing(thing):
1217
1184
        """Returns a function testing if an attribute is a D-Bus thing
1218
 
 
 
1185
        
1219
1186
        If called like _is_dbus_thing("method") it returns a function
1220
1187
        suitable for use as predicate to inspect.getmembers().
1221
1188
        """
1222
1189
        return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),
1223
1190
                                   False)
1224
 
 
 
1191
    
1225
1192
    def _get_all_dbus_things(self, thing):
1226
1193
        """Returns a generator of (name, attribute) pairs
1227
1194
        """
1230
1197
                for cls in self.__class__.__mro__
1231
1198
                for name, athing in
1232
1199
                inspect.getmembers(cls, self._is_dbus_thing(thing)))
1233
 
 
 
1200
    
1234
1201
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
 
                         out_signature="s",
1236
 
                         path_keyword='object_path',
1237
 
                         connection_keyword='connection')
 
1202
                         out_signature = "s",
 
1203
                         path_keyword = 'object_path',
 
1204
                         connection_keyword = 'connection')
1238
1205
    def Introspect(self, object_path, connection):
1239
1206
        """Overloading of standard D-Bus method.
1240
 
 
 
1207
        
1241
1208
        Inserts annotation tags on methods and signals.
1242
1209
        """
1243
1210
        xmlstring = dbus.service.Object.Introspect(self, object_path,
1244
1211
                                                   connection)
1245
1212
        try:
1246
1213
            document = xml.dom.minidom.parseString(xmlstring)
1247
 
 
 
1214
            
1248
1215
            for if_tag in document.getElementsByTagName("interface"):
1249
1216
                # Add annotation tags
1250
1217
                for typ in ("method", "signal"):
1277
1244
                    if_tag.appendChild(ann_tag)
1278
1245
                # Fix argument name for the Introspect method itself
1279
1246
                if (if_tag.getAttribute("name")
1280
 
                    == dbus.INTROSPECTABLE_IFACE):
 
1247
                                == dbus.INTROSPECTABLE_IFACE):
1281
1248
                    for cn in if_tag.getElementsByTagName("method"):
1282
1249
                        if cn.getAttribute("name") == "Introspect":
1283
1250
                            for arg in cn.getElementsByTagName("arg"):
1296
1263
 
1297
1264
class DBusObjectWithProperties(DBusObjectWithAnnotations):
1298
1265
    """A D-Bus object with properties.
1299
 
 
 
1266
    
1300
1267
    Classes inheriting from this can use the dbus_service_property
1301
1268
    decorator to expose methods as D-Bus properties.  It exposes the
1302
1269
    standard Get(), Set(), and GetAll() methods on the D-Bus.
1303
1270
    """
1304
 
 
 
1271
    
1305
1272
    def _get_dbus_property(self, interface_name, property_name):
1306
1273
        """Returns a bound method if one exists which is a D-Bus
1307
1274
        property with the specified name and interface.
1312
1279
                if (value._dbus_name == property_name
1313
1280
                    and value._dbus_interface == interface_name):
1314
1281
                    return value.__get__(self)
1315
 
 
 
1282
        
1316
1283
        # No such property
1317
1284
        raise DBusPropertyNotFound("{}:{}.{}".format(
1318
1285
            self.dbus_object_path, interface_name, property_name))
1319
 
 
 
1286
    
1320
1287
    @classmethod
1321
1288
    def _get_all_interface_names(cls):
1322
1289
        """Get a sequence of all interfaces supported by an object"""
1325
1292
                                     for x in (inspect.getmro(cls))
1326
1293
                                     for attr in dir(x))
1327
1294
                if name is not None)
1328
 
 
 
1295
    
1329
1296
    @dbus.service.method(dbus.PROPERTIES_IFACE,
1330
1297
                         in_signature="ss",
1331
1298
                         out_signature="v")
1339
1306
        if not hasattr(value, "variant_level"):
1340
1307
            return value
1341
1308
        return type(value)(value, variant_level=value.variant_level+1)
1342
 
 
 
1309
    
1343
1310
    @dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")
1344
1311
    def Set(self, interface_name, property_name, value):
1345
1312
        """Standard D-Bus property Set() method, see D-Bus standard.
1357
1324
            value = dbus.ByteArray(b''.join(chr(byte)
1358
1325
                                            for byte in value))
1359
1326
        prop(value)
1360
 
 
 
1327
    
1361
1328
    @dbus.service.method(dbus.PROPERTIES_IFACE,
1362
1329
                         in_signature="s",
1363
1330
                         out_signature="a{sv}")
1364
1331
    def GetAll(self, interface_name):
1365
1332
        """Standard D-Bus property GetAll() method, see D-Bus
1366
1333
        standard.
1367
 
 
 
1334
        
1368
1335
        Note: Will not include properties with access="write".
1369
1336
        """
1370
1337
        properties = {}
1381
1348
                properties[name] = value
1382
1349
                continue
1383
1350
            properties[name] = type(value)(
1384
 
                value, variant_level=value.variant_level + 1)
 
1351
                value, variant_level = value.variant_level + 1)
1385
1352
        return dbus.Dictionary(properties, signature="sv")
1386
 
 
 
1353
    
1387
1354
    @dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")
1388
1355
    def PropertiesChanged(self, interface_name, changed_properties,
1389
1356
                          invalidated_properties):
1391
1358
        standard.
1392
1359
        """
1393
1360
        pass
1394
 
 
 
1361
    
1395
1362
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1396
1363
                         out_signature="s",
1397
1364
                         path_keyword='object_path',
1398
1365
                         connection_keyword='connection')
1399
1366
    def Introspect(self, object_path, connection):
1400
1367
        """Overloading of standard D-Bus method.
1401
 
 
 
1368
        
1402
1369
        Inserts property tags and interface annotation tags.
1403
1370
        """
1404
1371
        xmlstring = DBusObjectWithAnnotations.Introspect(self,
1406
1373
                                                         connection)
1407
1374
        try:
1408
1375
            document = xml.dom.minidom.parseString(xmlstring)
1409
 
 
 
1376
            
1410
1377
            def make_tag(document, name, prop):
1411
1378
                e = document.createElement("property")
1412
1379
                e.setAttribute("name", name)
1413
1380
                e.setAttribute("type", prop._dbus_signature)
1414
1381
                e.setAttribute("access", prop._dbus_access)
1415
1382
                return e
1416
 
 
 
1383
            
1417
1384
            for if_tag in document.getElementsByTagName("interface"):
1418
1385
                # Add property tags
1419
1386
                for tag in (make_tag(document, name, prop)
1461
1428
                         exc_info=error)
1462
1429
        return xmlstring
1463
1430
 
1464
 
 
1465
1431
try:
1466
1432
    dbus.OBJECT_MANAGER_IFACE
1467
1433
except AttributeError:
1468
1434
    dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"
1469
1435
 
1470
 
 
1471
1436
class DBusObjectWithObjectManager(DBusObjectWithAnnotations):
1472
1437
    """A D-Bus object with an ObjectManager.
1473
 
 
 
1438
    
1474
1439
    Classes inheriting from this exposes the standard
1475
1440
    GetManagedObjects call and the InterfacesAdded and
1476
1441
    InterfacesRemoved signals on the standard
1477
1442
    "org.freedesktop.DBus.ObjectManager" interface.
1478
 
 
 
1443
    
1479
1444
    Note: No signals are sent automatically; they must be sent
1480
1445
    manually.
1481
1446
    """
1482
1447
    @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
1483
 
                         out_signature="a{oa{sa{sv}}}")
 
1448
                         out_signature = "a{oa{sa{sv}}}")
1484
1449
    def GetManagedObjects(self):
1485
1450
        """This function must be overridden"""
1486
1451
        raise NotImplementedError()
1487
 
 
 
1452
    
1488
1453
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,
1489
 
                         signature="oa{sa{sv}}")
 
1454
                         signature = "oa{sa{sv}}")
1490
1455
    def InterfacesAdded(self, object_path, interfaces_and_properties):
1491
1456
        pass
1492
 
 
1493
 
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")
 
1457
    
 
1458
    @dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")
1494
1459
    def InterfacesRemoved(self, object_path, interfaces):
1495
1460
        pass
1496
 
 
 
1461
    
1497
1462
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
 
                         out_signature="s",
1499
 
                         path_keyword='object_path',
1500
 
                         connection_keyword='connection')
 
1463
                         out_signature = "s",
 
1464
                         path_keyword = 'object_path',
 
1465
                         connection_keyword = 'connection')
1501
1466
    def Introspect(self, object_path, connection):
1502
1467
        """Overloading of standard D-Bus method.
1503
 
 
 
1468
        
1504
1469
        Override return argument name of GetManagedObjects to be
1505
1470
        "objpath_interfaces_and_properties"
1506
1471
        """
1509
1474
                                                         connection)
1510
1475
        try:
1511
1476
            document = xml.dom.minidom.parseString(xmlstring)
1512
 
 
 
1477
            
1513
1478
            for if_tag in document.getElementsByTagName("interface"):
1514
1479
                # Fix argument name for the GetManagedObjects method
1515
1480
                if (if_tag.getAttribute("name")
1516
 
                    == dbus.OBJECT_MANAGER_IFACE):
 
1481
                                == dbus.OBJECT_MANAGER_IFACE):
1517
1482
                    for cn in if_tag.getElementsByTagName("method"):
1518
1483
                        if (cn.getAttribute("name")
1519
1484
                            == "GetManagedObjects"):
1529
1494
        except (AttributeError, xml.dom.DOMException,
1530
1495
                xml.parsers.expat.ExpatError) as error:
1531
1496
            logger.error("Failed to override Introspection method",
1532
 
                         exc_info=error)
 
1497
                         exc_info = error)
1533
1498
        return xmlstring
1534
1499
 
1535
 
 
1536
1500
def datetime_to_dbus(dt, variant_level=0):
1537
1501
    """Convert a UTC datetime.datetime() to a D-Bus type."""
1538
1502
    if dt is None:
1539
 
        return dbus.String("", variant_level=variant_level)
 
1503
        return dbus.String("", variant_level = variant_level)
1540
1504
    return dbus.String(dt.isoformat(), variant_level=variant_level)
1541
1505
 
1542
1506
 
1545
1509
    dbus.service.Object, it will add alternate D-Bus attributes with
1546
1510
    interface names according to the "alt_interface_names" mapping.
1547
1511
    Usage:
1548
 
 
 
1512
    
1549
1513
    @alternate_dbus_interfaces({"org.example.Interface":
1550
1514
                                    "net.example.AlternateInterface"})
1551
1515
    class SampleDBusObject(dbus.service.Object):
1552
1516
        @dbus.service.method("org.example.Interface")
1553
1517
        def SampleDBusMethod():
1554
1518
            pass
1555
 
 
 
1519
    
1556
1520
    The above "SampleDBusMethod" on "SampleDBusObject" will be
1557
1521
    reachable via two interfaces: "org.example.Interface" and
1558
1522
    "net.example.AlternateInterface", the latter of which will have
1559
1523
    its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to
1560
1524
    "true", unless "deprecate" is passed with a False value.
1561
 
 
 
1525
    
1562
1526
    This works for methods and signals, and also for D-Bus properties
1563
1527
    (from DBusObjectWithProperties) and interfaces (from the
1564
1528
    dbus_interface_annotations decorator).
1565
1529
    """
1566
 
 
 
1530
    
1567
1531
    def wrapper(cls):
1568
1532
        for orig_interface_name, alt_interface_name in (
1569
1533
                alt_interface_names.items()):
1609
1573
                            attribute._dbus_annotations)
1610
1574
                    except AttributeError:
1611
1575
                        pass
1612
 
 
1613
1576
                    # Define a creator of a function to call both the
1614
1577
                    # original and alternate functions, so both the
1615
1578
                    # original and alternate signals gets sent when
1618
1581
                        """This function is a scope container to pass
1619
1582
                        func1 and func2 to the "call_both" function
1620
1583
                        outside of its arguments"""
1621
 
 
 
1584
                        
1622
1585
                        @functools.wraps(func2)
1623
1586
                        def call_both(*args, **kwargs):
1624
1587
                            """This function will emit two D-Bus
1625
1588
                            signals by calling func1 and func2"""
1626
1589
                            func1(*args, **kwargs)
1627
1590
                            func2(*args, **kwargs)
1628
 
                        # Make wrapper function look like a D-Bus
1629
 
                        # signal
 
1591
                        # Make wrapper function look like a D-Bus signal
1630
1592
                        for name, attr in inspect.getmembers(func2):
1631
1593
                            if name.startswith("_dbus_"):
1632
1594
                                setattr(call_both, name, attr)
1633
 
 
 
1595
                        
1634
1596
                        return call_both
1635
1597
                    # Create the "call_both" function and add it to
1636
1598
                    # the class
1682
1644
                        (copy_function(attribute)))
1683
1645
            if deprecate:
1684
1646
                # Deprecate all alternate interfaces
1685
 
                iname = "_AlternateDBusNames_interface_annotation{}"
 
1647
                iname="_AlternateDBusNames_interface_annotation{}"
1686
1648
                for interface_name in interface_names:
1687
 
 
 
1649
                    
1688
1650
                    @dbus_interface_annotations(interface_name)
1689
1651
                    def func(self):
1690
 
                        return {"org.freedesktop.DBus.Deprecated":
1691
 
                                "true"}
 
1652
                        return { "org.freedesktop.DBus.Deprecated":
 
1653
                                 "true" }
1692
1654
                    # Find an unused name
1693
1655
                    for aname in (iname.format(i)
1694
1656
                                  for i in itertools.count()):
1705
1667
                    cls = type("{}Alternate".format(cls.__name__),
1706
1668
                               (cls, ), attr)
1707
1669
        return cls
1708
 
 
 
1670
    
1709
1671
    return wrapper
1710
1672
 
1711
1673
 
1713
1675
                            "se.bsnet.fukt.Mandos"})
1714
1676
class ClientDBus(Client, DBusObjectWithProperties):
1715
1677
    """A Client class using D-Bus
1716
 
 
 
1678
    
1717
1679
    Attributes:
1718
1680
    dbus_object_path: dbus.ObjectPath
1719
1681
    bus: dbus.SystemBus()
1720
1682
    """
1721
 
 
 
1683
    
1722
1684
    runtime_expansions = (Client.runtime_expansions
1723
1685
                          + ("dbus_object_path", ))
1724
 
 
 
1686
    
1725
1687
    _interface = "se.recompile.Mandos.Client"
1726
 
 
 
1688
    
1727
1689
    # dbus.service.Object doesn't use super(), so we can't either.
1728
 
 
1729
 
    def __init__(self, bus=None, *args, **kwargs):
 
1690
    
 
1691
    def __init__(self, bus = None, *args, **kwargs):
1730
1692
        self.bus = bus
1731
1693
        Client.__init__(self, *args, **kwargs)
1732
1694
        # Only now, when this client is initialized, can it show up on
1738
1700
            "/clients/" + client_object_name)
1739
1701
        DBusObjectWithProperties.__init__(self, self.bus,
1740
1702
                                          self.dbus_object_path)
1741
 
 
 
1703
    
1742
1704
    def notifychangeproperty(transform_func, dbus_name,
1743
1705
                             type_func=lambda x: x,
1744
1706
                             variant_level=1,
1746
1708
                             _interface=_interface):
1747
1709
        """ Modify a variable so that it's a property which announces
1748
1710
        its changes to DBus.
1749
 
 
 
1711
        
1750
1712
        transform_fun: Function that takes a value and a variant_level
1751
1713
                       and transforms it to a D-Bus type.
1752
1714
        dbus_name: D-Bus name of the variable
1755
1717
        variant_level: D-Bus variant level.  Default: 1
1756
1718
        """
1757
1719
        attrname = "_{}".format(dbus_name)
1758
 
 
 
1720
        
1759
1721
        def setter(self, value):
1760
1722
            if hasattr(self, "dbus_object_path"):
1761
1723
                if (not hasattr(self, attrname) or
1768
1730
                    else:
1769
1731
                        dbus_value = transform_func(
1770
1732
                            type_func(value),
1771
 
                            variant_level=variant_level)
 
1733
                            variant_level = variant_level)
1772
1734
                        self.PropertyChanged(dbus.String(dbus_name),
1773
1735
                                             dbus_value)
1774
1736
                        self.PropertiesChanged(
1775
1737
                            _interface,
1776
 
                            dbus.Dictionary({dbus.String(dbus_name):
1777
 
                                             dbus_value}),
 
1738
                            dbus.Dictionary({ dbus.String(dbus_name):
 
1739
                                              dbus_value }),
1778
1740
                            dbus.Array())
1779
1741
            setattr(self, attrname, value)
1780
 
 
 
1742
        
1781
1743
        return property(lambda self: getattr(self, attrname), setter)
1782
 
 
 
1744
    
1783
1745
    expires = notifychangeproperty(datetime_to_dbus, "Expires")
1784
1746
    approvals_pending = notifychangeproperty(dbus.Boolean,
1785
1747
                                             "ApprovalPending",
1786
 
                                             type_func=bool)
 
1748
                                             type_func = bool)
1787
1749
    enabled = notifychangeproperty(dbus.Boolean, "Enabled")
1788
1750
    last_enabled = notifychangeproperty(datetime_to_dbus,
1789
1751
                                        "LastEnabled")
1790
1752
    checker = notifychangeproperty(
1791
1753
        dbus.Boolean, "CheckerRunning",
1792
 
        type_func=lambda checker: checker is not None)
 
1754
        type_func = lambda checker: checker is not None)
1793
1755
    last_checked_ok = notifychangeproperty(datetime_to_dbus,
1794
1756
                                           "LastCheckedOK")
1795
1757
    last_checker_status = notifychangeproperty(dbus.Int16,
1800
1762
                                               "ApprovedByDefault")
1801
1763
    approval_delay = notifychangeproperty(
1802
1764
        dbus.UInt64, "ApprovalDelay",
1803
 
        type_func=lambda td: td.total_seconds() * 1000)
 
1765
        type_func = lambda td: td.total_seconds() * 1000)
1804
1766
    approval_duration = notifychangeproperty(
1805
1767
        dbus.UInt64, "ApprovalDuration",
1806
 
        type_func=lambda td: td.total_seconds() * 1000)
 
1768
        type_func = lambda td: td.total_seconds() * 1000)
1807
1769
    host = notifychangeproperty(dbus.String, "Host")
1808
1770
    timeout = notifychangeproperty(
1809
1771
        dbus.UInt64, "Timeout",
1810
 
        type_func=lambda td: td.total_seconds() * 1000)
 
1772
        type_func = lambda td: td.total_seconds() * 1000)
1811
1773
    extended_timeout = notifychangeproperty(
1812
1774
        dbus.UInt64, "ExtendedTimeout",
1813
 
        type_func=lambda td: td.total_seconds() * 1000)
 
1775
        type_func = lambda td: td.total_seconds() * 1000)
1814
1776
    interval = notifychangeproperty(
1815
1777
        dbus.UInt64, "Interval",
1816
 
        type_func=lambda td: td.total_seconds() * 1000)
 
1778
        type_func = lambda td: td.total_seconds() * 1000)
1817
1779
    checker_command = notifychangeproperty(dbus.String, "Checker")
1818
1780
    secret = notifychangeproperty(dbus.ByteArray, "Secret",
1819
1781
                                  invalidate_only=True)
1820
 
 
 
1782
    
1821
1783
    del notifychangeproperty
1822
 
 
 
1784
    
1823
1785
    def __del__(self, *args, **kwargs):
1824
1786
        try:
1825
1787
            self.remove_from_connection()
1828
1790
        if hasattr(DBusObjectWithProperties, "__del__"):
1829
1791
            DBusObjectWithProperties.__del__(self, *args, **kwargs)
1830
1792
        Client.__del__(self, *args, **kwargs)
1831
 
 
 
1793
    
1832
1794
    def checker_callback(self, source, condition,
1833
1795
                         connection, command, *args, **kwargs):
1834
1796
        ret = Client.checker_callback(self, source, condition,
1850
1812
                                      | self.last_checker_signal),
1851
1813
                                  dbus.String(command))
1852
1814
        return ret
1853
 
 
 
1815
    
1854
1816
    def start_checker(self, *args, **kwargs):
1855
1817
        old_checker_pid = getattr(self.checker, "pid", None)
1856
1818
        r = Client.start_checker(self, *args, **kwargs)
1860
1822
            # Emit D-Bus signal
1861
1823
            self.CheckerStarted(self.current_checker_command)
1862
1824
        return r
1863
 
 
 
1825
    
1864
1826
    def _reset_approved(self):
1865
1827
        self.approved = None
1866
1828
        return False
1867
 
 
 
1829
    
1868
1830
    def approve(self, value=True):
1869
1831
        self.approved = value
1870
1832
        GLib.timeout_add(int(self.approval_duration.total_seconds()
1871
1833
                             * 1000), self._reset_approved)
1872
1834
        self.send_changedstate()
1873
 
 
1874
 
    #  D-Bus methods, signals & properties
1875
 
 
1876
 
    #  Interfaces
1877
 
 
1878
 
    #  Signals
1879
 
 
 
1835
    
 
1836
    ## D-Bus methods, signals & properties
 
1837
    
 
1838
    ## Interfaces
 
1839
    
 
1840
    ## Signals
 
1841
    
1880
1842
    # CheckerCompleted - signal
1881
1843
    @dbus.service.signal(_interface, signature="nxs")
1882
1844
    def CheckerCompleted(self, exitcode, waitstatus, command):
1883
1845
        "D-Bus signal"
1884
1846
        pass
1885
 
 
 
1847
    
1886
1848
    # CheckerStarted - signal
1887
1849
    @dbus.service.signal(_interface, signature="s")
1888
1850
    def CheckerStarted(self, command):
1889
1851
        "D-Bus signal"
1890
1852
        pass
1891
 
 
 
1853
    
1892
1854
    # PropertyChanged - signal
1893
1855
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1894
1856
    @dbus.service.signal(_interface, signature="sv")
1895
1857
    def PropertyChanged(self, property, value):
1896
1858
        "D-Bus signal"
1897
1859
        pass
1898
 
 
 
1860
    
1899
1861
    # GotSecret - signal
1900
1862
    @dbus.service.signal(_interface)
1901
1863
    def GotSecret(self):
1904
1866
        server to mandos-client
1905
1867
        """
1906
1868
        pass
1907
 
 
 
1869
    
1908
1870
    # Rejected - signal
1909
1871
    @dbus.service.signal(_interface, signature="s")
1910
1872
    def Rejected(self, reason):
1911
1873
        "D-Bus signal"
1912
1874
        pass
1913
 
 
 
1875
    
1914
1876
    # NeedApproval - signal
1915
1877
    @dbus.service.signal(_interface, signature="tb")
1916
1878
    def NeedApproval(self, timeout, default):
1917
1879
        "D-Bus signal"
1918
1880
        return self.need_approval()
1919
 
 
1920
 
    #  Methods
1921
 
 
 
1881
    
 
1882
    ## Methods
 
1883
    
1922
1884
    # Approve - method
1923
1885
    @dbus.service.method(_interface, in_signature="b")
1924
1886
    def Approve(self, value):
1925
1887
        self.approve(value)
1926
 
 
 
1888
    
1927
1889
    # CheckedOK - method
1928
1890
    @dbus.service.method(_interface)
1929
1891
    def CheckedOK(self):
1930
1892
        self.checked_ok()
1931
 
 
 
1893
    
1932
1894
    # Enable - method
1933
1895
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1934
1896
    @dbus.service.method(_interface)
1935
1897
    def Enable(self):
1936
1898
        "D-Bus method"
1937
1899
        self.enable()
1938
 
 
 
1900
    
1939
1901
    # StartChecker - method
1940
1902
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1941
1903
    @dbus.service.method(_interface)
1942
1904
    def StartChecker(self):
1943
1905
        "D-Bus method"
1944
1906
        self.start_checker()
1945
 
 
 
1907
    
1946
1908
    # Disable - method
1947
1909
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1948
1910
    @dbus.service.method(_interface)
1949
1911
    def Disable(self):
1950
1912
        "D-Bus method"
1951
1913
        self.disable()
1952
 
 
 
1914
    
1953
1915
    # StopChecker - method
1954
1916
    @dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})
1955
1917
    @dbus.service.method(_interface)
1956
1918
    def StopChecker(self):
1957
1919
        self.stop_checker()
1958
 
 
1959
 
    #  Properties
1960
 
 
 
1920
    
 
1921
    ## Properties
 
1922
    
1961
1923
    # ApprovalPending - property
1962
1924
    @dbus_service_property(_interface, signature="b", access="read")
1963
1925
    def ApprovalPending_dbus_property(self):
1964
1926
        return dbus.Boolean(bool(self.approvals_pending))
1965
 
 
 
1927
    
1966
1928
    # ApprovedByDefault - property
1967
1929
    @dbus_service_property(_interface,
1968
1930
                           signature="b",
1971
1933
        if value is None:       # get
1972
1934
            return dbus.Boolean(self.approved_by_default)
1973
1935
        self.approved_by_default = bool(value)
1974
 
 
 
1936
    
1975
1937
    # ApprovalDelay - property
1976
1938
    @dbus_service_property(_interface,
1977
1939
                           signature="t",
1981
1943
            return dbus.UInt64(self.approval_delay.total_seconds()
1982
1944
                               * 1000)
1983
1945
        self.approval_delay = datetime.timedelta(0, 0, 0, value)
1984
 
 
 
1946
    
1985
1947
    # ApprovalDuration - property
1986
1948
    @dbus_service_property(_interface,
1987
1949
                           signature="t",
1991
1953
            return dbus.UInt64(self.approval_duration.total_seconds()
1992
1954
                               * 1000)
1993
1955
        self.approval_duration = datetime.timedelta(0, 0, 0, value)
1994
 
 
 
1956
    
1995
1957
    # Name - property
1996
1958
    @dbus_annotations(
1997
1959
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
1998
1960
    @dbus_service_property(_interface, signature="s", access="read")
1999
1961
    def Name_dbus_property(self):
2000
1962
        return dbus.String(self.name)
2001
 
 
 
1963
    
2002
1964
    # Fingerprint - property
2003
1965
    @dbus_annotations(
2004
1966
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2005
1967
    @dbus_service_property(_interface, signature="s", access="read")
2006
1968
    def Fingerprint_dbus_property(self):
2007
1969
        return dbus.String(self.fingerprint)
2008
 
 
 
1970
    
2009
1971
    # Host - property
2010
1972
    @dbus_service_property(_interface,
2011
1973
                           signature="s",
2014
1976
        if value is None:       # get
2015
1977
            return dbus.String(self.host)
2016
1978
        self.host = str(value)
2017
 
 
 
1979
    
2018
1980
    # Created - property
2019
1981
    @dbus_annotations(
2020
1982
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2021
1983
    @dbus_service_property(_interface, signature="s", access="read")
2022
1984
    def Created_dbus_property(self):
2023
1985
        return datetime_to_dbus(self.created)
2024
 
 
 
1986
    
2025
1987
    # LastEnabled - property
2026
1988
    @dbus_service_property(_interface, signature="s", access="read")
2027
1989
    def LastEnabled_dbus_property(self):
2028
1990
        return datetime_to_dbus(self.last_enabled)
2029
 
 
 
1991
    
2030
1992
    # Enabled - property
2031
1993
    @dbus_service_property(_interface,
2032
1994
                           signature="b",
2038
2000
            self.enable()
2039
2001
        else:
2040
2002
            self.disable()
2041
 
 
 
2003
    
2042
2004
    # LastCheckedOK - property
2043
2005
    @dbus_service_property(_interface,
2044
2006
                           signature="s",
2048
2010
            self.checked_ok()
2049
2011
            return
2050
2012
        return datetime_to_dbus(self.last_checked_ok)
2051
 
 
 
2013
    
2052
2014
    # LastCheckerStatus - property
2053
2015
    @dbus_service_property(_interface, signature="n", access="read")
2054
2016
    def LastCheckerStatus_dbus_property(self):
2055
2017
        return dbus.Int16(self.last_checker_status)
2056
 
 
 
2018
    
2057
2019
    # Expires - property
2058
2020
    @dbus_service_property(_interface, signature="s", access="read")
2059
2021
    def Expires_dbus_property(self):
2060
2022
        return datetime_to_dbus(self.expires)
2061
 
 
 
2023
    
2062
2024
    # LastApprovalRequest - property
2063
2025
    @dbus_service_property(_interface, signature="s", access="read")
2064
2026
    def LastApprovalRequest_dbus_property(self):
2065
2027
        return datetime_to_dbus(self.last_approval_request)
2066
 
 
 
2028
    
2067
2029
    # Timeout - property
2068
2030
    @dbus_service_property(_interface,
2069
2031
                           signature="t",
2088
2050
                self.disable_initiator_tag = GLib.timeout_add(
2089
2051
                    int((self.expires - now).total_seconds() * 1000),
2090
2052
                    self.disable)
2091
 
 
 
2053
    
2092
2054
    # ExtendedTimeout - property
2093
2055
    @dbus_service_property(_interface,
2094
2056
                           signature="t",
2098
2060
            return dbus.UInt64(self.extended_timeout.total_seconds()
2099
2061
                               * 1000)
2100
2062
        self.extended_timeout = datetime.timedelta(0, 0, 0, value)
2101
 
 
 
2063
    
2102
2064
    # Interval - property
2103
2065
    @dbus_service_property(_interface,
2104
2066
                           signature="t",
2114
2076
            GLib.source_remove(self.checker_initiator_tag)
2115
2077
            self.checker_initiator_tag = GLib.timeout_add(
2116
2078
                value, self.start_checker)
2117
 
            self.start_checker()  # Start one now, too
2118
 
 
 
2079
            self.start_checker() # Start one now, too
 
2080
    
2119
2081
    # Checker - property
2120
2082
    @dbus_service_property(_interface,
2121
2083
                           signature="s",
2124
2086
        if value is None:       # get
2125
2087
            return dbus.String(self.checker_command)
2126
2088
        self.checker_command = str(value)
2127
 
 
 
2089
    
2128
2090
    # CheckerRunning - property
2129
2091
    @dbus_service_property(_interface,
2130
2092
                           signature="b",
2136
2098
            self.start_checker()
2137
2099
        else:
2138
2100
            self.stop_checker()
2139
 
 
 
2101
    
2140
2102
    # ObjectPath - property
2141
2103
    @dbus_annotations(
2142
2104
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",
2143
2105
         "org.freedesktop.DBus.Deprecated": "true"})
2144
2106
    @dbus_service_property(_interface, signature="o", access="read")
2145
2107
    def ObjectPath_dbus_property(self):
2146
 
        return self.dbus_object_path  # is already a dbus.ObjectPath
2147
 
 
 
2108
        return self.dbus_object_path # is already a dbus.ObjectPath
 
2109
    
2148
2110
    # Secret = property
2149
2111
    @dbus_annotations(
2150
2112
        {"org.freedesktop.DBus.Property.EmitsChangedSignal":
2155
2117
                           byte_arrays=True)
2156
2118
    def Secret_dbus_property(self, value):
2157
2119
        self.secret = bytes(value)
2158
 
 
 
2120
    
2159
2121
    del _interface
2160
2122
 
2161
2123
 
2165
2127
        self._pipe.send(('init', fpr, address))
2166
2128
        if not self._pipe.recv():
2167
2129
            raise KeyError(fpr)
2168
 
 
 
2130
    
2169
2131
    def __getattribute__(self, name):
2170
2132
        if name == '_pipe':
2171
2133
            return super(ProxyClient, self).__getattribute__(name)
2174
2136
        if data[0] == 'data':
2175
2137
            return data[1]
2176
2138
        if data[0] == 'function':
2177
 
 
 
2139
            
2178
2140
            def func(*args, **kwargs):
2179
2141
                self._pipe.send(('funcall', name, args, kwargs))
2180
2142
                return self._pipe.recv()[1]
2181
 
 
 
2143
            
2182
2144
            return func
2183
 
 
 
2145
    
2184
2146
    def __setattr__(self, name, value):
2185
2147
        if name == '_pipe':
2186
2148
            return super(ProxyClient, self).__setattr__(name, value)
2189
2151
 
2190
2152
class ClientHandler(socketserver.BaseRequestHandler, object):
2191
2153
    """A class to handle client connections.
2192
 
 
 
2154
    
2193
2155
    Instantiated once for each connection to handle it.
2194
2156
    Note: This will run in its own forked process."""
2195
 
 
 
2157
    
2196
2158
    def handle(self):
2197
2159
        with contextlib.closing(self.server.child_pipe) as child_pipe:
2198
2160
            logger.info("TCP connection from: %s",
2199
2161
                        str(self.client_address))
2200
2162
            logger.debug("Pipe FD: %d",
2201
2163
                         self.server.child_pipe.fileno())
2202
 
 
 
2164
            
2203
2165
            session = gnutls.ClientSession(self.request)
2204
 
 
2205
 
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
2206
 
            #                       "+AES-256-CBC", "+SHA1",
2207
 
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
2208
 
            #                       "+DHE-DSS"))
 
2166
            
 
2167
            #priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
2168
            #                      "+AES-256-CBC", "+SHA1",
 
2169
            #                      "+COMP-NULL", "+CTYPE-OPENPGP",
 
2170
            #                      "+DHE-DSS"))
2209
2171
            # Use a fallback default, since this MUST be set.
2210
2172
            priority = self.server.gnutls_priority
2211
2173
            if priority is None:
2212
2174
                priority = "NORMAL"
2213
 
            gnutls.priority_set_direct(session._c_object,
2214
 
                                       priority.encode("utf-8"),
 
2175
            gnutls.priority_set_direct(session._c_object, priority,
2215
2176
                                       None)
2216
 
 
 
2177
            
2217
2178
            # Start communication using the Mandos protocol
2218
2179
            # Get protocol number
2219
2180
            line = self.request.makefile().readline()
2224
2185
            except (ValueError, IndexError, RuntimeError) as error:
2225
2186
                logger.error("Unknown protocol version: %s", error)
2226
2187
                return
2227
 
 
 
2188
            
2228
2189
            # Start GnuTLS connection
2229
2190
            try:
2230
2191
                session.handshake()
2234
2195
                # established.  Just abandon the request.
2235
2196
                return
2236
2197
            logger.debug("Handshake succeeded")
2237
 
 
 
2198
            
2238
2199
            approval_required = False
2239
2200
            try:
2240
2201
                try:
2244
2205
                    logger.warning("Bad certificate: %s", error)
2245
2206
                    return
2246
2207
                logger.debug("Fingerprint: %s", fpr)
2247
 
 
 
2208
                
2248
2209
                try:
2249
2210
                    client = ProxyClient(child_pipe, fpr,
2250
2211
                                         self.client_address)
2251
2212
                except KeyError:
2252
2213
                    return
2253
 
 
 
2214
                
2254
2215
                if client.approval_delay:
2255
2216
                    delay = client.approval_delay
2256
2217
                    client.approvals_pending += 1
2257
2218
                    approval_required = True
2258
 
 
 
2219
                
2259
2220
                while True:
2260
2221
                    if not client.enabled:
2261
2222
                        logger.info("Client %s is disabled",
2264
2225
                            # Emit D-Bus signal
2265
2226
                            client.Rejected("Disabled")
2266
2227
                        return
2267
 
 
 
2228
                    
2268
2229
                    if client.approved or not client.approval_delay:
2269
 
                        # We are approved or approval is disabled
 
2230
                        #We are approved or approval is disabled
2270
2231
                        break
2271
2232
                    elif client.approved is None:
2272
2233
                        logger.info("Client %s needs approval",
2283
2244
                            # Emit D-Bus signal
2284
2245
                            client.Rejected("Denied")
2285
2246
                        return
2286
 
 
2287
 
                    # wait until timeout or approved
 
2247
                    
 
2248
                    #wait until timeout or approved
2288
2249
                    time = datetime.datetime.now()
2289
2250
                    client.changedstate.acquire()
2290
2251
                    client.changedstate.wait(delay.total_seconds())
2303
2264
                            break
2304
2265
                    else:
2305
2266
                        delay -= time2 - time
2306
 
 
 
2267
                
2307
2268
                try:
2308
2269
                    session.send(client.secret)
2309
2270
                except gnutls.Error as error:
2310
2271
                    logger.warning("gnutls send failed",
2311
 
                                   exc_info=error)
 
2272
                                   exc_info = error)
2312
2273
                    return
2313
 
 
 
2274
                
2314
2275
                logger.info("Sending secret to %s", client.name)
2315
2276
                # bump the timeout using extended_timeout
2316
2277
                client.bump_timeout(client.extended_timeout)
2317
2278
                if self.server.use_dbus:
2318
2279
                    # Emit D-Bus signal
2319
2280
                    client.GotSecret()
2320
 
 
 
2281
            
2321
2282
            finally:
2322
2283
                if approval_required:
2323
2284
                    client.approvals_pending -= 1
2326
2287
                except gnutls.Error as error:
2327
2288
                    logger.warning("GnuTLS bye failed",
2328
2289
                                   exc_info=error)
2329
 
 
 
2290
    
2330
2291
    @staticmethod
2331
2292
    def peer_certificate(session):
2332
2293
        "Return the peer's OpenPGP certificate as a bytestring"
2344
2305
            return None
2345
2306
        cert = cert_list[0]
2346
2307
        return ctypes.string_at(cert.data, cert.size)
2347
 
 
 
2308
    
2348
2309
    @staticmethod
2349
2310
    def fingerprint(openpgp):
2350
2311
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
2383
2344
 
2384
2345
class MultiprocessingMixIn(object):
2385
2346
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
2386
 
 
 
2347
    
2387
2348
    def sub_process_main(self, request, address):
2388
2349
        try:
2389
2350
            self.finish_request(request, address)
2390
2351
        except Exception:
2391
2352
            self.handle_error(request, address)
2392
2353
        self.close_request(request)
2393
 
 
 
2354
    
2394
2355
    def process_request(self, request, address):
2395
2356
        """Start a new process to process the request."""
2396
 
        proc = multiprocessing.Process(target=self.sub_process_main,
2397
 
                                       args=(request, address))
 
2357
        proc = multiprocessing.Process(target = self.sub_process_main,
 
2358
                                       args = (request, address))
2398
2359
        proc.start()
2399
2360
        return proc
2400
2361
 
2401
2362
 
2402
2363
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2403
2364
    """ adds a pipe to the MixIn """
2404
 
 
 
2365
    
2405
2366
    def process_request(self, request, client_address):
2406
2367
        """Overrides and wraps the original process_request().
2407
 
 
 
2368
        
2408
2369
        This function creates a new pipe in self.pipe
2409
2370
        """
2410
2371
        parent_pipe, self.child_pipe = multiprocessing.Pipe()
2411
 
 
 
2372
        
2412
2373
        proc = MultiprocessingMixIn.process_request(self, request,
2413
2374
                                                    client_address)
2414
2375
        self.child_pipe.close()
2415
2376
        self.add_pipe(parent_pipe, proc)
2416
 
 
 
2377
    
2417
2378
    def add_pipe(self, parent_pipe, proc):
2418
2379
        """Dummy function; override as necessary"""
2419
2380
        raise NotImplementedError()
2422
2383
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2423
2384
                     socketserver.TCPServer, object):
2424
2385
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
2425
 
 
 
2386
    
2426
2387
    Attributes:
2427
2388
        enabled:        Boolean; whether this server is activated yet
2428
2389
        interface:      None or a network interface name (string)
2429
2390
        use_ipv6:       Boolean; to use IPv6 or not
2430
2391
    """
2431
 
 
 
2392
    
2432
2393
    def __init__(self, server_address, RequestHandlerClass,
2433
2394
                 interface=None,
2434
2395
                 use_ipv6=True,
2444
2405
            self.socketfd = socketfd
2445
2406
            # Save the original socket.socket() function
2446
2407
            self.socket_socket = socket.socket
2447
 
 
2448
2408
            # To implement --socket, we monkey patch socket.socket.
2449
 
            #
 
2409
            # 
2450
2410
            # (When socketserver.TCPServer is a new-style class, we
2451
2411
            # could make self.socket into a property instead of monkey
2452
2412
            # patching socket.socket.)
2453
 
            #
 
2413
            # 
2454
2414
            # Create a one-time-only replacement for socket.socket()
2455
2415
            @functools.wraps(socket.socket)
2456
2416
            def socket_wrapper(*args, **kwargs):
2468
2428
        # socket_wrapper(), if socketfd was set.
2469
2429
        socketserver.TCPServer.__init__(self, server_address,
2470
2430
                                        RequestHandlerClass)
2471
 
 
 
2431
    
2472
2432
    def server_bind(self):
2473
2433
        """This overrides the normal server_bind() function
2474
2434
        to bind to an interface if one was specified, and also NOT to
2475
2435
        bind to an address or port if they were not specified."""
2476
 
        global SO_BINDTODEVICE
2477
2436
        if self.interface is not None:
2478
2437
            if SO_BINDTODEVICE is None:
2479
 
                # Fall back to a hard-coded value which seems to be
2480
 
                # common enough.
2481
 
                logger.warning("SO_BINDTODEVICE not found, trying 25")
2482
 
                SO_BINDTODEVICE = 25
2483
 
            try:
2484
 
                self.socket.setsockopt(
2485
 
                    socket.SOL_SOCKET, SO_BINDTODEVICE,
2486
 
                    (self.interface + "\0").encode("utf-8"))
2487
 
            except socket.error as error:
2488
 
                if error.errno == errno.EPERM:
2489
 
                    logger.error("No permission to bind to"
2490
 
                                 " interface %s", self.interface)
2491
 
                elif error.errno == errno.ENOPROTOOPT:
2492
 
                    logger.error("SO_BINDTODEVICE not available;"
2493
 
                                 " cannot bind to interface %s",
2494
 
                                 self.interface)
2495
 
                elif error.errno == errno.ENODEV:
2496
 
                    logger.error("Interface %s does not exist,"
2497
 
                                 " cannot bind", self.interface)
2498
 
                else:
2499
 
                    raise
 
2438
                logger.error("SO_BINDTODEVICE does not exist;"
 
2439
                             " cannot bind to interface %s",
 
2440
                             self.interface)
 
2441
            else:
 
2442
                try:
 
2443
                    self.socket.setsockopt(
 
2444
                        socket.SOL_SOCKET, SO_BINDTODEVICE,
 
2445
                        (self.interface + "\0").encode("utf-8"))
 
2446
                except socket.error as error:
 
2447
                    if error.errno == errno.EPERM:
 
2448
                        logger.error("No permission to bind to"
 
2449
                                     " interface %s", self.interface)
 
2450
                    elif error.errno == errno.ENOPROTOOPT:
 
2451
                        logger.error("SO_BINDTODEVICE not available;"
 
2452
                                     " cannot bind to interface %s",
 
2453
                                     self.interface)
 
2454
                    elif error.errno == errno.ENODEV:
 
2455
                        logger.error("Interface %s does not exist,"
 
2456
                                     " cannot bind", self.interface)
 
2457
                    else:
 
2458
                        raise
2500
2459
        # Only bind(2) the socket if we really need to.
2501
2460
        if self.server_address[0] or self.server_address[1]:
2502
2461
            if not self.server_address[0]:
2503
2462
                if self.address_family == socket.AF_INET6:
2504
 
                    any_address = "::"  # in6addr_any
 
2463
                    any_address = "::" # in6addr_any
2505
2464
                else:
2506
 
                    any_address = "0.0.0.0"  # INADDR_ANY
 
2465
                    any_address = "0.0.0.0" # INADDR_ANY
2507
2466
                self.server_address = (any_address,
2508
2467
                                       self.server_address[1])
2509
2468
            elif not self.server_address[1]:
2519
2478
 
2520
2479
class MandosServer(IPv6_TCPServer):
2521
2480
    """Mandos server.
2522
 
 
 
2481
    
2523
2482
    Attributes:
2524
2483
        clients:        set of Client objects
2525
2484
        gnutls_priority GnuTLS priority string
2526
2485
        use_dbus:       Boolean; to emit D-Bus signals or not
2527
 
 
 
2486
    
2528
2487
    Assumes a GLib.MainLoop event loop.
2529
2488
    """
2530
 
 
 
2489
    
2531
2490
    def __init__(self, server_address, RequestHandlerClass,
2532
2491
                 interface=None,
2533
2492
                 use_ipv6=True,
2543
2502
        self.gnutls_priority = gnutls_priority
2544
2503
        IPv6_TCPServer.__init__(self, server_address,
2545
2504
                                RequestHandlerClass,
2546
 
                                interface=interface,
2547
 
                                use_ipv6=use_ipv6,
2548
 
                                socketfd=socketfd)
2549
 
 
 
2505
                                interface = interface,
 
2506
                                use_ipv6 = use_ipv6,
 
2507
                                socketfd = socketfd)
 
2508
    
2550
2509
    def server_activate(self):
2551
2510
        if self.enabled:
2552
2511
            return socketserver.TCPServer.server_activate(self)
2553
 
 
 
2512
    
2554
2513
    def enable(self):
2555
2514
        self.enabled = True
2556
 
 
 
2515
    
2557
2516
    def add_pipe(self, parent_pipe, proc):
2558
2517
        # Call "handle_ipc" for both data and EOF events
2559
2518
        GLib.io_add_watch(
2560
2519
            parent_pipe.fileno(),
2561
2520
            GLib.IO_IN | GLib.IO_HUP,
2562
2521
            functools.partial(self.handle_ipc,
2563
 
                              parent_pipe=parent_pipe,
2564
 
                              proc=proc))
2565
 
 
 
2522
                              parent_pipe = parent_pipe,
 
2523
                              proc = proc))
 
2524
    
2566
2525
    def handle_ipc(self, source, condition,
2567
2526
                   parent_pipe=None,
2568
 
                   proc=None,
 
2527
                   proc = None,
2569
2528
                   client_object=None):
2570
2529
        # error, or the other end of multiprocessing.Pipe has closed
2571
2530
        if condition & (GLib.IO_ERR | GLib.IO_HUP):
2572
2531
            # Wait for other process to exit
2573
2532
            proc.join()
2574
2533
            return False
2575
 
 
 
2534
        
2576
2535
        # Read a request from the child
2577
2536
        request = parent_pipe.recv()
2578
2537
        command = request[0]
2579
 
 
 
2538
        
2580
2539
        if command == 'init':
2581
 
            fpr = request[1].decode("ascii")
 
2540
            fpr = request[1]
2582
2541
            address = request[2]
2583
 
 
 
2542
            
2584
2543
            for c in self.clients.values():
2585
2544
                if c.fingerprint == fpr:
2586
2545
                    client = c
2594
2553
                                                       address[0])
2595
2554
                parent_pipe.send(False)
2596
2555
                return False
2597
 
 
 
2556
            
2598
2557
            GLib.io_add_watch(
2599
2558
                parent_pipe.fileno(),
2600
2559
                GLib.IO_IN | GLib.IO_HUP,
2601
2560
                functools.partial(self.handle_ipc,
2602
 
                                  parent_pipe=parent_pipe,
2603
 
                                  proc=proc,
2604
 
                                  client_object=client))
 
2561
                                  parent_pipe = parent_pipe,
 
2562
                                  proc = proc,
 
2563
                                  client_object = client))
2605
2564
            parent_pipe.send(True)
2606
2565
            # remove the old hook in favor of the new above hook on
2607
2566
            # same fileno
2610
2569
            funcname = request[1]
2611
2570
            args = request[2]
2612
2571
            kwargs = request[3]
2613
 
 
 
2572
            
2614
2573
            parent_pipe.send(('data', getattr(client_object,
2615
2574
                                              funcname)(*args,
2616
2575
                                                        **kwargs)))
2617
 
 
 
2576
        
2618
2577
        if command == 'getattr':
2619
2578
            attrname = request[1]
2620
2579
            if isinstance(client_object.__getattribute__(attrname),
2623
2582
            else:
2624
2583
                parent_pipe.send((
2625
2584
                    'data', client_object.__getattribute__(attrname)))
2626
 
 
 
2585
        
2627
2586
        if command == 'setattr':
2628
2587
            attrname = request[1]
2629
2588
            value = request[2]
2630
2589
            setattr(client_object, attrname, value)
2631
 
 
 
2590
        
2632
2591
        return True
2633
2592
 
2634
2593
 
2635
2594
def rfc3339_duration_to_delta(duration):
2636
2595
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2637
 
 
 
2596
    
2638
2597
    >>> rfc3339_duration_to_delta("P7D")
2639
2598
    datetime.timedelta(7)
2640
2599
    >>> rfc3339_duration_to_delta("PT60S")
2650
2609
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2651
2610
    datetime.timedelta(1, 200)
2652
2611
    """
2653
 
 
 
2612
    
2654
2613
    # Parsing an RFC 3339 duration with regular expressions is not
2655
2614
    # possible - there would have to be multiple places for the same
2656
2615
    # values, like seconds.  The current code, while more esoteric, is
2657
2616
    # cleaner without depending on a parsing library.  If Python had a
2658
2617
    # built-in library for parsing we would use it, but we'd like to
2659
2618
    # avoid excessive use of external libraries.
2660
 
 
 
2619
    
2661
2620
    # New type for defining tokens, syntax, and semantics all-in-one
2662
2621
    Token = collections.namedtuple("Token", (
2663
2622
        "regexp",  # To match token; if "value" is not None, must have
2696
2655
                           frozenset((token_year, token_month,
2697
2656
                                      token_day, token_time,
2698
2657
                                      token_week)))
2699
 
    # Define starting values:
2700
 
    # Value so far
2701
 
    value = datetime.timedelta()
 
2658
    # Define starting values
 
2659
    value = datetime.timedelta() # Value so far
2702
2660
    found_token = None
2703
 
    # Following valid tokens
2704
 
    followers = frozenset((token_duration, ))
2705
 
    # String left to parse
2706
 
    s = duration
 
2661
    followers = frozenset((token_duration, )) # Following valid tokens
 
2662
    s = duration                # String left to parse
2707
2663
    # Loop until end token is found
2708
2664
    while found_token is not token_end:
2709
2665
        # Search for any currently valid tokens
2733
2689
 
2734
2690
def string_to_delta(interval):
2735
2691
    """Parse a string and return a datetime.timedelta
2736
 
 
 
2692
    
2737
2693
    >>> string_to_delta('7d')
2738
2694
    datetime.timedelta(7)
2739
2695
    >>> string_to_delta('60s')
2747
2703
    >>> string_to_delta('5m 30s')
2748
2704
    datetime.timedelta(0, 330)
2749
2705
    """
2750
 
 
 
2706
    
2751
2707
    try:
2752
2708
        return rfc3339_duration_to_delta(interval)
2753
2709
    except ValueError:
2754
2710
        pass
2755
 
 
 
2711
    
2756
2712
    timevalue = datetime.timedelta(0)
2757
2713
    for s in interval.split():
2758
2714
        try:
2776
2732
    return timevalue
2777
2733
 
2778
2734
 
2779
 
def daemon(nochdir=False, noclose=False):
 
2735
def daemon(nochdir = False, noclose = False):
2780
2736
    """See daemon(3).  Standard BSD Unix function.
2781
 
 
 
2737
    
2782
2738
    This should really exist as os.daemon, but it doesn't (yet)."""
2783
2739
    if os.fork():
2784
2740
        sys.exit()
2802
2758
 
2803
2759
 
2804
2760
def main():
2805
 
 
 
2761
    
2806
2762
    ##################################################################
2807
2763
    # Parsing of options, both command line and config file
2808
 
 
 
2764
    
2809
2765
    parser = argparse.ArgumentParser()
2810
2766
    parser.add_argument("-v", "--version", action="version",
2811
 
                        version="%(prog)s {}".format(version),
 
2767
                        version = "%(prog)s {}".format(version),
2812
2768
                        help="show version number and exit")
2813
2769
    parser.add_argument("-i", "--interface", metavar="IF",
2814
2770
                        help="Bind to interface IF")
2850
2806
    parser.add_argument("--no-zeroconf", action="store_false",
2851
2807
                        dest="zeroconf", help="Do not use Zeroconf",
2852
2808
                        default=None)
2853
 
 
 
2809
    
2854
2810
    options = parser.parse_args()
2855
 
 
 
2811
    
2856
2812
    if options.check:
2857
2813
        import doctest
2858
2814
        fail_count, test_count = doctest.testmod()
2859
2815
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2860
 
 
 
2816
    
2861
2817
    # Default values for config file for server-global settings
2862
 
    server_defaults = {"interface": "",
2863
 
                       "address": "",
2864
 
                       "port": "",
2865
 
                       "debug": "False",
2866
 
                       "priority":
2867
 
                       "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2868
 
                       ":+SIGN-DSA-SHA256",
2869
 
                       "servicename": "Mandos",
2870
 
                       "use_dbus": "True",
2871
 
                       "use_ipv6": "True",
2872
 
                       "debuglevel": "",
2873
 
                       "restore": "True",
2874
 
                       "socket": "",
2875
 
                       "statedir": "/var/lib/mandos",
2876
 
                       "foreground": "False",
2877
 
                       "zeroconf": "True",
2878
 
                       }
2879
 
 
 
2818
    server_defaults = { "interface": "",
 
2819
                        "address": "",
 
2820
                        "port": "",
 
2821
                        "debug": "False",
 
2822
                        "priority":
 
2823
                        "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
2824
                        ":+SIGN-DSA-SHA256",
 
2825
                        "servicename": "Mandos",
 
2826
                        "use_dbus": "True",
 
2827
                        "use_ipv6": "True",
 
2828
                        "debuglevel": "",
 
2829
                        "restore": "True",
 
2830
                        "socket": "",
 
2831
                        "statedir": "/var/lib/mandos",
 
2832
                        "foreground": "False",
 
2833
                        "zeroconf": "True",
 
2834
                    }
 
2835
    
2880
2836
    # Parse config file for server-global settings
2881
2837
    server_config = configparser.SafeConfigParser(server_defaults)
2882
2838
    del server_defaults
2884
2840
    # Convert the SafeConfigParser object to a dict
2885
2841
    server_settings = server_config.defaults()
2886
2842
    # Use the appropriate methods on the non-string config options
2887
 
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2888
 
                   "foreground", "zeroconf"):
 
2843
    for option in ("debug", "use_dbus", "use_ipv6", "foreground"):
2889
2844
        server_settings[option] = server_config.getboolean("DEFAULT",
2890
2845
                                                           option)
2891
2846
    if server_settings["port"]:
2901
2856
            server_settings["socket"] = os.dup(server_settings
2902
2857
                                               ["socket"])
2903
2858
    del server_config
2904
 
 
 
2859
    
2905
2860
    # Override the settings from the config file with command line
2906
2861
    # options, if set.
2907
2862
    for option in ("interface", "address", "port", "debug",
2925
2880
    if server_settings["debug"]:
2926
2881
        server_settings["foreground"] = True
2927
2882
    # Now we have our good server settings in "server_settings"
2928
 
 
 
2883
    
2929
2884
    ##################################################################
2930
 
 
 
2885
    
2931
2886
    if (not server_settings["zeroconf"]
2932
2887
        and not (server_settings["port"]
2933
2888
                 or server_settings["socket"] != "")):
2934
2889
        parser.error("Needs port or socket to work without Zeroconf")
2935
 
 
 
2890
    
2936
2891
    # For convenience
2937
2892
    debug = server_settings["debug"]
2938
2893
    debuglevel = server_settings["debuglevel"]
2942
2897
                                     stored_state_file)
2943
2898
    foreground = server_settings["foreground"]
2944
2899
    zeroconf = server_settings["zeroconf"]
2945
 
 
 
2900
    
2946
2901
    if debug:
2947
2902
        initlogger(debug, logging.DEBUG)
2948
2903
    else:
2951
2906
        else:
2952
2907
            level = getattr(logging, debuglevel.upper())
2953
2908
            initlogger(debug, level)
2954
 
 
 
2909
    
2955
2910
    if server_settings["servicename"] != "Mandos":
2956
2911
        syslogger.setFormatter(
2957
2912
            logging.Formatter('Mandos ({}) [%(process)d]:'
2958
2913
                              ' %(levelname)s: %(message)s'.format(
2959
2914
                                  server_settings["servicename"])))
2960
 
 
 
2915
    
2961
2916
    # Parse config file with clients
2962
2917
    client_config = configparser.SafeConfigParser(Client
2963
2918
                                                  .client_defaults)
2964
2919
    client_config.read(os.path.join(server_settings["configdir"],
2965
2920
                                    "clients.conf"))
2966
 
 
 
2921
    
2967
2922
    global mandos_dbus_service
2968
2923
    mandos_dbus_service = None
2969
 
 
 
2924
    
2970
2925
    socketfd = None
2971
2926
    if server_settings["socket"] != "":
2972
2927
        socketfd = server_settings["socket"]
2988
2943
        except IOError as e:
2989
2944
            logger.error("Could not open file %r", pidfilename,
2990
2945
                         exc_info=e)
2991
 
 
 
2946
    
2992
2947
    for name, group in (("_mandos", "_mandos"),
2993
2948
                        ("mandos", "mandos"),
2994
2949
                        ("nobody", "nogroup")):
3012
2967
                       .format(uid, gid, os.strerror(error.errno)))
3013
2968
        if error.errno != errno.EPERM:
3014
2969
            raise
3015
 
 
 
2970
    
3016
2971
    if debug:
3017
2972
        # Enable all possible GnuTLS debugging
3018
 
 
 
2973
        
3019
2974
        # "Use a log level over 10 to enable all debugging options."
3020
2975
        # - GnuTLS manual
3021
2976
        gnutls.global_set_log_level(11)
3022
 
 
 
2977
        
3023
2978
        @gnutls.log_func
3024
2979
        def debug_gnutls(level, string):
3025
2980
            logger.debug("GnuTLS: %s", string[:-1])
3026
 
 
 
2981
        
3027
2982
        gnutls.global_set_log_function(debug_gnutls)
3028
 
 
 
2983
        
3029
2984
        # Redirect stdin so all checkers get /dev/null
3030
2985
        null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)
3031
2986
        os.dup2(null, sys.stdin.fileno())
3032
2987
        if null > 2:
3033
2988
            os.close(null)
3034
 
 
 
2989
    
3035
2990
    # Need to fork before connecting to D-Bus
3036
2991
    if not foreground:
3037
2992
        # Close all input and output, do double fork, etc.
3038
2993
        daemon()
3039
 
 
 
2994
    
3040
2995
    # multiprocessing will use threads, so before we use GLib we need
3041
2996
    # to inform GLib that threads will be used.
3042
2997
    GLib.threads_init()
3043
 
 
 
2998
    
3044
2999
    global main_loop
3045
3000
    # From the Avahi example code
3046
3001
    DBusGMainLoop(set_as_default=True)
3063
3018
    if zeroconf:
3064
3019
        protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET
3065
3020
        service = AvahiServiceToSyslog(
3066
 
            name=server_settings["servicename"],
3067
 
            servicetype="_mandos._tcp",
3068
 
            protocol=protocol,
3069
 
            bus=bus)
 
3021
            name = server_settings["servicename"],
 
3022
            servicetype = "_mandos._tcp",
 
3023
            protocol = protocol,
 
3024
            bus = bus)
3070
3025
        if server_settings["interface"]:
3071
3026
            service.interface = if_nametoindex(
3072
3027
                server_settings["interface"].encode("utf-8"))
3073
 
 
 
3028
    
3074
3029
    global multiprocessing_manager
3075
3030
    multiprocessing_manager = multiprocessing.Manager()
3076
 
 
 
3031
    
3077
3032
    client_class = Client
3078
3033
    if use_dbus:
3079
 
        client_class = functools.partial(ClientDBus, bus=bus)
3080
 
 
 
3034
        client_class = functools.partial(ClientDBus, bus = bus)
 
3035
    
3081
3036
    client_settings = Client.config_parser(client_config)
3082
3037
    old_client_settings = {}
3083
3038
    clients_data = {}
3084
 
 
 
3039
    
3085
3040
    # This is used to redirect stdout and stderr for checker processes
3086
3041
    global wnull
3087
 
    wnull = open(os.devnull, "w")  # A writable /dev/null
 
3042
    wnull = open(os.devnull, "w") # A writable /dev/null
3088
3043
    # Only used if server is running in foreground but not in debug
3089
3044
    # mode
3090
3045
    if debug or not foreground:
3091
3046
        wnull.close()
3092
 
 
 
3047
    
3093
3048
    # Get client data and settings from last running state.
3094
3049
    if server_settings["restore"]:
3095
3050
        try:
3096
3051
            with open(stored_state_path, "rb") as stored_state:
3097
 
                if sys.version_info.major == 2:
 
3052
                if sys.version_info.major == 2:                
3098
3053
                    clients_data, old_client_settings = pickle.load(
3099
3054
                        stored_state)
3100
3055
                else:
3101
3056
                    bytes_clients_data, bytes_old_client_settings = (
3102
 
                        pickle.load(stored_state, encoding="bytes"))
3103
 
                    #   Fix bytes to strings
3104
 
                    #  clients_data
 
3057
                        pickle.load(stored_state, encoding = "bytes"))
 
3058
                    ### Fix bytes to strings
 
3059
                    ## clients_data
3105
3060
                    # .keys()
3106
 
                    clients_data = {(key.decode("utf-8")
3107
 
                                     if isinstance(key, bytes)
3108
 
                                     else key): value
3109
 
                                    for key, value in
3110
 
                                    bytes_clients_data.items()}
 
3061
                    clients_data = { (key.decode("utf-8")
 
3062
                                      if isinstance(key, bytes)
 
3063
                                      else key): value
 
3064
                                     for key, value in
 
3065
                                     bytes_clients_data.items() }
3111
3066
                    del bytes_clients_data
3112
3067
                    for key in clients_data:
3113
 
                        value = {(k.decode("utf-8")
3114
 
                                  if isinstance(k, bytes) else k): v
3115
 
                                 for k, v in
3116
 
                                 clients_data[key].items()}
 
3068
                        value = { (k.decode("utf-8")
 
3069
                                   if isinstance(k, bytes) else k): v
 
3070
                                  for k, v in
 
3071
                                  clients_data[key].items() }
3117
3072
                        clients_data[key] = value
3118
3073
                        # .client_structure
3119
3074
                        value["client_structure"] = [
3120
3075
                            (s.decode("utf-8")
3121
3076
                             if isinstance(s, bytes)
3122
3077
                             else s) for s in
3123
 
                            value["client_structure"]]
 
3078
                            value["client_structure"] ]
3124
3079
                        # .name & .host
3125
3080
                        for k in ("name", "host"):
3126
3081
                            if isinstance(value[k], bytes):
3127
3082
                                value[k] = value[k].decode("utf-8")
3128
 
                    #  old_client_settings
 
3083
                    ## old_client_settings
3129
3084
                    # .keys()
3130
3085
                    old_client_settings = {
3131
3086
                        (key.decode("utf-8")
3132
3087
                         if isinstance(key, bytes)
3133
3088
                         else key): value
3134
3089
                        for key, value in
3135
 
                        bytes_old_client_settings.items()}
 
3090
                        bytes_old_client_settings.items() }
3136
3091
                    del bytes_old_client_settings
3137
3092
                    # .host
3138
3093
                    for value in old_client_settings.values():
3152
3107
            logger.warning("Could not load persistent state: "
3153
3108
                           "EOFError:",
3154
3109
                           exc_info=e)
3155
 
 
 
3110
    
3156
3111
    with PGPEngine() as pgp:
3157
3112
        for client_name, client in clients_data.items():
3158
3113
            # Skip removed clients
3159
3114
            if client_name not in client_settings:
3160
3115
                continue
3161
 
 
 
3116
            
3162
3117
            # Decide which value to use after restoring saved state.
3163
3118
            # We have three different values: Old config file,
3164
3119
            # new config file, and saved state.
3175
3130
                        client[name] = value
3176
3131
                except KeyError:
3177
3132
                    pass
3178
 
 
 
3133
            
3179
3134
            # Clients who has passed its expire date can still be
3180
3135
            # enabled if its last checker was successful.  A Client
3181
3136
            # whose checker succeeded before we stored its state is
3214
3169
                    client_name))
3215
3170
                client["secret"] = (client_settings[client_name]
3216
3171
                                    ["secret"])
3217
 
 
 
3172
    
3218
3173
    # Add/remove clients based on new changes made to config
3219
3174
    for client_name in (set(old_client_settings)
3220
3175
                        - set(client_settings)):
3222
3177
    for client_name in (set(client_settings)
3223
3178
                        - set(old_client_settings)):
3224
3179
        clients_data[client_name] = client_settings[client_name]
3225
 
 
 
3180
    
3226
3181
    # Create all client objects
3227
3182
    for client_name, client in clients_data.items():
3228
3183
        tcp_server.clients[client_name] = client_class(
3229
 
            name=client_name,
3230
 
            settings=client,
3231
 
            server_settings=server_settings)
3232
 
 
 
3184
            name = client_name,
 
3185
            settings = client,
 
3186
            server_settings = server_settings)
 
3187
    
3233
3188
    if not tcp_server.clients:
3234
3189
        logger.warning("No clients defined")
3235
 
 
 
3190
    
3236
3191
    if not foreground:
3237
3192
        if pidfile is not None:
3238
3193
            pid = os.getpid()
3244
3199
                             pidfilename, pid)
3245
3200
        del pidfile
3246
3201
        del pidfilename
3247
 
 
 
3202
    
3248
3203
    for termsig in (signal.SIGHUP, signal.SIGTERM):
3249
3204
        GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,
3250
3205
                             lambda: main_loop.quit() and False)
3251
 
 
 
3206
    
3252
3207
    if use_dbus:
3253
 
 
 
3208
        
3254
3209
        @alternate_dbus_interfaces(
3255
 
            {"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})
 
3210
            { "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })
3256
3211
        class MandosDBusService(DBusObjectWithObjectManager):
3257
3212
            """A D-Bus proxy object"""
3258
 
 
 
3213
            
3259
3214
            def __init__(self):
3260
3215
                dbus.service.Object.__init__(self, bus, "/")
3261
 
 
 
3216
            
3262
3217
            _interface = "se.recompile.Mandos"
3263
 
 
 
3218
            
3264
3219
            @dbus.service.signal(_interface, signature="o")
3265
3220
            def ClientAdded(self, objpath):
3266
3221
                "D-Bus signal"
3267
3222
                pass
3268
 
 
 
3223
            
3269
3224
            @dbus.service.signal(_interface, signature="ss")
3270
3225
            def ClientNotFound(self, fingerprint, address):
3271
3226
                "D-Bus signal"
3272
3227
                pass
3273
 
 
 
3228
            
3274
3229
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
3275
3230
                               "true"})
3276
3231
            @dbus.service.signal(_interface, signature="os")
3277
3232
            def ClientRemoved(self, objpath, name):
3278
3233
                "D-Bus signal"
3279
3234
                pass
3280
 
 
 
3235
            
3281
3236
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
3282
3237
                               "true"})
3283
3238
            @dbus.service.method(_interface, out_signature="ao")
3285
3240
                "D-Bus method"
3286
3241
                return dbus.Array(c.dbus_object_path for c in
3287
3242
                                  tcp_server.clients.values())
3288
 
 
 
3243
            
3289
3244
            @dbus_annotations({"org.freedesktop.DBus.Deprecated":
3290
3245
                               "true"})
3291
3246
            @dbus.service.method(_interface,
3293
3248
            def GetAllClientsWithProperties(self):
3294
3249
                "D-Bus method"
3295
3250
                return dbus.Dictionary(
3296
 
                    {c.dbus_object_path: c.GetAll(
 
3251
                    { c.dbus_object_path: c.GetAll(
3297
3252
                        "se.recompile.Mandos.Client")
3298
 
                     for c in tcp_server.clients.values()},
 
3253
                      for c in tcp_server.clients.values() },
3299
3254
                    signature="oa{sv}")
3300
 
 
 
3255
            
3301
3256
            @dbus.service.method(_interface, in_signature="o")
3302
3257
            def RemoveClient(self, object_path):
3303
3258
                "D-Bus method"
3311
3266
                        self.client_removed_signal(c)
3312
3267
                        return
3313
3268
                raise KeyError(object_path)
3314
 
 
 
3269
            
3315
3270
            del _interface
3316
 
 
 
3271
            
3317
3272
            @dbus.service.method(dbus.OBJECT_MANAGER_IFACE,
3318
 
                                 out_signature="a{oa{sa{sv}}}")
 
3273
                                 out_signature = "a{oa{sa{sv}}}")
3319
3274
            def GetManagedObjects(self):
3320
3275
                """D-Bus method"""
3321
3276
                return dbus.Dictionary(
3322
 
                    {client.dbus_object_path:
3323
 
                     dbus.Dictionary(
3324
 
                         {interface: client.GetAll(interface)
3325
 
                          for interface in
3326
 
                          client._get_all_interface_names()})
3327
 
                     for client in tcp_server.clients.values()})
3328
 
 
 
3277
                    { client.dbus_object_path:
 
3278
                      dbus.Dictionary(
 
3279
                          { interface: client.GetAll(interface)
 
3280
                            for interface in
 
3281
                                 client._get_all_interface_names()})
 
3282
                      for client in tcp_server.clients.values()})
 
3283
            
3329
3284
            def client_added_signal(self, client):
3330
3285
                """Send the new standard signal and the old signal"""
3331
3286
                if use_dbus:
3333
3288
                    self.InterfacesAdded(
3334
3289
                        client.dbus_object_path,
3335
3290
                        dbus.Dictionary(
3336
 
                            {interface: client.GetAll(interface)
3337
 
                             for interface in
3338
 
                             client._get_all_interface_names()}))
 
3291
                            { interface: client.GetAll(interface)
 
3292
                              for interface in
 
3293
                              client._get_all_interface_names()}))
3339
3294
                    # Old signal
3340
3295
                    self.ClientAdded(client.dbus_object_path)
3341
 
 
 
3296
            
3342
3297
            def client_removed_signal(self, client):
3343
3298
                """Send the new standard signal and the old signal"""
3344
3299
                if use_dbus:
3349
3304
                    # Old signal
3350
3305
                    self.ClientRemoved(client.dbus_object_path,
3351
3306
                                       client.name)
3352
 
 
 
3307
        
3353
3308
        mandos_dbus_service = MandosDBusService()
3354
 
 
3355
 
    # Save modules to variables to exempt the modules from being
3356
 
    # unloaded before the function registered with atexit() is run.
3357
 
    mp = multiprocessing
3358
 
    wn = wnull
3359
 
 
 
3309
    
3360
3310
    def cleanup():
3361
3311
        "Cleanup function; run on exit"
3362
3312
        if zeroconf:
3363
3313
            service.cleanup()
3364
 
 
3365
 
        mp.active_children()
3366
 
        wn.close()
 
3314
        
 
3315
        multiprocessing.active_children()
 
3316
        wnull.close()
3367
3317
        if not (tcp_server.clients or client_settings):
3368
3318
            return
3369
 
 
 
3319
        
3370
3320
        # Store client before exiting. Secrets are encrypted with key
3371
3321
        # based on what config file has. If config file is
3372
3322
        # removed/edited, old secret will thus be unrecovable.
3377
3327
                client.encrypted_secret = pgp.encrypt(client.secret,
3378
3328
                                                      key)
3379
3329
                client_dict = {}
3380
 
 
 
3330
                
3381
3331
                # A list of attributes that can not be pickled
3382
3332
                # + secret.
3383
 
                exclude = {"bus", "changedstate", "secret",
3384
 
                           "checker", "server_settings"}
 
3333
                exclude = { "bus", "changedstate", "secret",
 
3334
                            "checker", "server_settings" }
3385
3335
                for name, typ in inspect.getmembers(dbus.service
3386
3336
                                                    .Object):
3387
3337
                    exclude.add(name)
3388
 
 
 
3338
                
3389
3339
                client_dict["encrypted_secret"] = (client
3390
3340
                                                   .encrypted_secret)
3391
3341
                for attr in client.client_structure:
3392
3342
                    if attr not in exclude:
3393
3343
                        client_dict[attr] = getattr(client, attr)
3394
 
 
 
3344
                
3395
3345
                clients[client.name] = client_dict
3396
3346
                del client_settings[client.name]["secret"]
3397
 
 
 
3347
        
3398
3348
        try:
3399
3349
            with tempfile.NamedTemporaryFile(
3400
3350
                    mode='wb',
3403
3353
                    dir=os.path.dirname(stored_state_path),
3404
3354
                    delete=False) as stored_state:
3405
3355
                pickle.dump((clients, client_settings), stored_state,
3406
 
                            protocol=2)
 
3356
                            protocol = 2)
3407
3357
                tempname = stored_state.name
3408
3358
            os.rename(tempname, stored_state_path)
3409
3359
        except (IOError, OSError) as e:
3419
3369
                logger.warning("Could not save persistent state:",
3420
3370
                               exc_info=e)
3421
3371
                raise
3422
 
 
 
3372
        
3423
3373
        # Delete all clients, and settings from config
3424
3374
        while tcp_server.clients:
3425
3375
            name, client = tcp_server.clients.popitem()
3431
3381
            if use_dbus:
3432
3382
                mandos_dbus_service.client_removed_signal(client)
3433
3383
        client_settings.clear()
3434
 
 
 
3384
    
3435
3385
    atexit.register(cleanup)
3436
 
 
 
3386
    
3437
3387
    for client in tcp_server.clients.values():
3438
3388
        if use_dbus:
3439
3389
            # Emit D-Bus signal for adding
3441
3391
        # Need to initiate checking of clients
3442
3392
        if client.enabled:
3443
3393
            client.init_checker()
3444
 
 
 
3394
    
3445
3395
    tcp_server.enable()
3446
3396
    tcp_server.server_activate()
3447
 
 
 
3397
    
3448
3398
    # Find out what port we got
3449
3399
    if zeroconf:
3450
3400
        service.port = tcp_server.socket.getsockname()[1]
3455
3405
    else:                       # IPv4
3456
3406
        logger.info("Now listening on address %r, port %d",
3457
3407
                    *tcp_server.socket.getsockname())
3458
 
 
3459
 
    # service.interface = tcp_server.socket.getsockname()[3]
3460
 
 
 
3408
    
 
3409
    #service.interface = tcp_server.socket.getsockname()[3]
 
3410
    
3461
3411
    try:
3462
3412
        if zeroconf:
3463
3413
            # From the Avahi example code
3468
3418
                cleanup()
3469
3419
                sys.exit(1)
3470
3420
            # End of Avahi example code
3471
 
 
 
3421
        
3472
3422
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3473
3423
                          lambda *args, **kwargs:
3474
3424
                          (tcp_server.handle_request
3475
3425
                           (*args[2:], **kwargs) or True))
3476
 
 
 
3426
        
3477
3427
        logger.debug("Starting main loop")
3478
3428
        main_loop.run()
3479
3429
    except AvahiError as error: