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  • Committer: Teddy Hogeborn
  • Date: 2022-04-23 23:58:39 UTC
  • Revision ID: teddy@recompile.se-20220423235839-cnt9aq1kjveqaydc
Bug fix in mandos-ctl: handle backslashes in password

* mandos-ctl (mode=password): When sending the password to gpg, use
  "printf" instead of "echo -n".  This avoids the behavior of the
  "echo" builtin in "dash", which always interprets backslash escape
  codes.

Reported-By: Jesse Norell <jesse@kci.net>

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Lines of Context:
1
 
#!/usr/bin/python
2
 
# -*- mode: python; coding: utf-8 -*-
 
1
#!/usr/bin/python3 -bI
 
2
# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-
3
3
#
4
4
# Mandos server - give out binary blobs to connecting clients.
5
5
#
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
 
14
# Copyright © 2008-2020 Teddy Hogeborn
 
15
# Copyright © 2008-2020 Björn Påhlsson
16
16
#
17
17
# This file is part of Mandos.
18
18
#
77
77
import itertools
78
78
import collections
79
79
import codecs
 
80
import unittest
 
81
import random
 
82
import shlex
80
83
 
81
84
import dbus
82
85
import dbus.service
 
86
import gi
83
87
from gi.repository import GLib
84
88
from dbus.mainloop.glib import DBusGMainLoop
85
89
import ctypes
87
91
import xml.dom.minidom
88
92
import inspect
89
93
 
 
94
if sys.version_info.major == 2:
 
95
    __metaclass__ = type
 
96
    str = unicode
 
97
 
 
98
# Add collections.abc.Callable if it does not exist
 
99
try:
 
100
    collections.abc.Callable
 
101
except AttributeError:
 
102
    class abc:
 
103
        Callable = collections.Callable
 
104
    collections.abc = abc
 
105
    del abc
 
106
 
 
107
# Add shlex.quote if it does not exist
 
108
try:
 
109
    shlex.quote
 
110
except AttributeError:
 
111
    shlex.quote = re.escape
 
112
 
 
113
# Show warnings by default
 
114
if not sys.warnoptions:
 
115
    import warnings
 
116
    warnings.simplefilter("default")
 
117
 
90
118
# Try to find the value of SO_BINDTODEVICE:
91
119
try:
92
120
    # This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
112
140
            # No value found
113
141
            SO_BINDTODEVICE = None
114
142
 
115
 
if sys.version_info.major == 2:
116
 
    str = unicode
 
143
if sys.version_info < (3, 2):
 
144
    configparser.Configparser = configparser.SafeConfigParser
117
145
 
118
 
version = "1.7.19"
 
146
version = "1.8.14"
119
147
stored_state_file = "clients.pickle"
120
148
 
121
149
logger = logging.getLogger()
 
150
logging.captureWarnings(True)   # Show warnings via the logging system
122
151
syslogger = None
123
152
 
124
153
try:
160
189
        facility=logging.handlers.SysLogHandler.LOG_DAEMON,
161
190
        address="/dev/log"))
162
191
    syslogger.setFormatter(logging.Formatter
163
 
                           ('Mandos [%(process)d]: %(levelname)s:'
164
 
                            ' %(message)s'))
 
192
                           ("Mandos [%(process)d]: %(levelname)s:"
 
193
                            " %(message)s"))
165
194
    logger.addHandler(syslogger)
166
195
 
167
196
    if debug:
168
197
        console = logging.StreamHandler()
169
 
        console.setFormatter(logging.Formatter('%(asctime)s %(name)s'
170
 
                                               ' [%(process)d]:'
171
 
                                               ' %(levelname)s:'
172
 
                                               ' %(message)s'))
 
198
        console.setFormatter(logging.Formatter("%(asctime)s %(name)s"
 
199
                                               " [%(process)d]:"
 
200
                                               " %(levelname)s:"
 
201
                                               " %(message)s"))
173
202
        logger.addHandler(console)
174
203
    logger.setLevel(level)
175
204
 
179
208
    pass
180
209
 
181
210
 
182
 
class PGPEngine(object):
 
211
class PGPEngine:
183
212
    """A simple class for OpenPGP symmetric encryption & decryption"""
184
213
 
185
214
    def __init__(self):
189
218
            output = subprocess.check_output(["gpgconf"])
190
219
            for line in output.splitlines():
191
220
                name, text, path = line.split(b":")
192
 
                if name == "gpg":
 
221
                if name == b"gpg":
193
222
                    self.gpg = path
194
223
                    break
195
224
        except OSError as e:
196
225
            if e.errno != errno.ENOENT:
197
226
                raise
198
 
        self.gnupgargs = ['--batch',
199
 
                          '--homedir', self.tempdir,
200
 
                          '--force-mdc',
201
 
                          '--quiet']
 
227
        self.gnupgargs = ["--batch",
 
228
                          "--homedir", self.tempdir,
 
229
                          "--force-mdc",
 
230
                          "--quiet"]
202
231
        # Only GPG version 1 has the --no-use-agent option.
203
 
        if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
 
232
        if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
204
233
            self.gnupgargs.append("--no-use-agent")
205
234
 
206
235
    def __enter__(self):
243
272
                dir=self.tempdir) as passfile:
244
273
            passfile.write(passphrase)
245
274
            passfile.flush()
246
 
            proc = subprocess.Popen([self.gpg, '--symmetric',
247
 
                                     '--passphrase-file',
 
275
            proc = subprocess.Popen([self.gpg, "--symmetric",
 
276
                                     "--passphrase-file",
248
277
                                     passfile.name]
249
278
                                    + self.gnupgargs,
250
279
                                    stdin=subprocess.PIPE,
261
290
                dir=self.tempdir) as passfile:
262
291
            passfile.write(passphrase)
263
292
            passfile.flush()
264
 
            proc = subprocess.Popen([self.gpg, '--decrypt',
265
 
                                     '--passphrase-file',
 
293
            proc = subprocess.Popen([self.gpg, "--decrypt",
 
294
                                     "--passphrase-file",
266
295
                                     passfile.name]
267
296
                                    + self.gnupgargs,
268
297
                                    stdin=subprocess.PIPE,
275
304
 
276
305
 
277
306
# Pretend that we have an Avahi module
278
 
class Avahi(object):
279
 
    """This isn't so much a class as it is a module-like namespace.
280
 
    It is instantiated once, and simulates having an Avahi module."""
 
307
class avahi:
 
308
    """This isn't so much a class as it is a module-like namespace."""
281
309
    IF_UNSPEC = -1               # avahi-common/address.h
282
310
    PROTO_UNSPEC = -1            # avahi-common/address.h
283
311
    PROTO_INET = 0               # avahi-common/address.h
287
315
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
288
316
    DBUS_PATH_SERVER = "/"
289
317
 
290
 
    def string_array_to_txt_array(self, t):
 
318
    @staticmethod
 
319
    def string_array_to_txt_array(t):
291
320
        return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
292
321
                           for s in t), signature="ay")
293
322
    ENTRY_GROUP_ESTABLISHED = 2  # avahi-common/defs.h
298
327
    SERVER_RUNNING = 2           # avahi-common/defs.h
299
328
    SERVER_COLLISION = 3         # avahi-common/defs.h
300
329
    SERVER_FAILURE = 4           # avahi-common/defs.h
301
 
avahi = Avahi()
302
330
 
303
331
 
304
332
class AvahiError(Exception):
316
344
    pass
317
345
 
318
346
 
319
 
class AvahiService(object):
 
347
class AvahiService:
320
348
    """An Avahi (Zeroconf) service.
321
349
 
322
350
    Attributes:
323
351
    interface: integer; avahi.IF_UNSPEC or an interface index.
324
352
               Used to optionally bind to the specified interface.
325
 
    name: string; Example: 'Mandos'
326
 
    type: string; Example: '_mandos._tcp'.
 
353
    name: string; Example: "Mandos"
 
354
    type: string; Example: "_mandos._tcp".
327
355
     See <https://www.iana.org/assignments/service-names-port-numbers>
328
356
    port: integer; what port to announce
329
357
    TXT: list of strings; TXT record for the service
407
435
                avahi.DBUS_INTERFACE_ENTRY_GROUP)
408
436
        self.entry_group_state_changed_match = (
409
437
            self.group.connect_to_signal(
410
 
                'StateChanged', self.entry_group_state_changed))
 
438
                "StateChanged", self.entry_group_state_changed))
411
439
        logger.debug("Adding Zeroconf service '%s' of type '%s' ...",
412
440
                     self.name, self.type)
413
441
        self.group.AddService(
496
524
class AvahiServiceToSyslog(AvahiService):
497
525
    def rename(self, *args, **kwargs):
498
526
        """Add the new name to the syslog messages"""
499
 
        ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
 
527
        ret = super(AvahiServiceToSyslog, self).rename(*args,
 
528
                                                       **kwargs)
500
529
        syslogger.setFormatter(logging.Formatter(
501
 
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
 
530
            "Mandos ({}) [%(process)d]: %(levelname)s: %(message)s"
502
531
            .format(self.name)))
503
532
        return ret
504
533
 
505
534
 
506
535
# Pretend that we have a GnuTLS module
507
 
class GnuTLS(object):
508
 
    """This isn't so much a class as it is a module-like namespace.
509
 
    It is instantiated once, and simulates having a GnuTLS module."""
 
536
class gnutls:
 
537
    """This isn't so much a class as it is a module-like namespace."""
510
538
 
511
539
    library = ctypes.util.find_library("gnutls")
512
540
    if library is None:
513
541
        library = ctypes.util.find_library("gnutls-deb0")
514
542
    _library = ctypes.cdll.LoadLibrary(library)
515
543
    del library
516
 
    _need_version = b"3.3.0"
517
 
 
518
 
    def __init__(self):
519
 
        # Need to use "self" here, since this method is called before
520
 
        # the assignment to the "gnutls" global variable happens.
521
 
        if self.check_version(self._need_version) is None:
522
 
            raise self.Error("Needs GnuTLS {} or later"
523
 
                             .format(self._need_version))
524
544
 
525
545
    # Unless otherwise indicated, the constants and types below are
526
546
    # all from the gnutls/gnutls.h C header file.
530
550
    E_INTERRUPTED = -52
531
551
    E_AGAIN = -28
532
552
    CRT_OPENPGP = 2
 
553
    CRT_RAWPK = 3
533
554
    CLIENT = 2
534
555
    SHUT_RDWR = 0
535
556
    CRD_CERTIFICATE = 1
536
557
    E_NO_CERTIFICATE_FOUND = -49
 
558
    X509_FMT_DER = 0
 
559
    NO_TICKETS = 1<<10
 
560
    ENABLE_RAWPK = 1<<18
 
561
    CTYPE_PEERS = 3
 
562
    KEYID_USE_SHA256 = 1        # gnutls/x509.h
537
563
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
538
564
 
539
565
    # Types
540
 
    class session_int(ctypes.Structure):
 
566
    class _session_int(ctypes.Structure):
541
567
        _fields_ = []
542
 
    session_t = ctypes.POINTER(session_int)
 
568
    session_t = ctypes.POINTER(_session_int)
543
569
 
544
570
    class certificate_credentials_st(ctypes.Structure):
545
571
        _fields_ = []
548
574
    certificate_type_t = ctypes.c_int
549
575
 
550
576
    class datum_t(ctypes.Structure):
551
 
        _fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),
552
 
                    ('size', ctypes.c_uint)]
 
577
        _fields_ = [("data", ctypes.POINTER(ctypes.c_ubyte)),
 
578
                    ("size", ctypes.c_uint)]
553
579
 
554
 
    class openpgp_crt_int(ctypes.Structure):
 
580
    class _openpgp_crt_int(ctypes.Structure):
555
581
        _fields_ = []
556
 
    openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)
 
582
    openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)
557
583
    openpgp_crt_fmt_t = ctypes.c_int  # gnutls/openpgp.h
558
584
    log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)
559
585
    credentials_type_t = ctypes.c_int
562
588
 
563
589
    # Exceptions
564
590
    class Error(Exception):
565
 
        # We need to use the class name "GnuTLS" here, since this
566
 
        # exception might be raised from within GnuTLS.__init__,
567
 
        # which is called before the assignment to the "gnutls"
568
 
        # global variable has happened.
569
591
        def __init__(self, message=None, code=None, args=()):
570
592
            # Default usage is by a message string, but if a return
571
593
            # code is passed, convert it to a string with
572
594
            # gnutls.strerror()
573
595
            self.code = code
574
596
            if message is None and code is not None:
575
 
                message = GnuTLS.strerror(code)
576
 
            return super(GnuTLS.Error, self).__init__(
 
597
                message = gnutls.strerror(code).decode(
 
598
                    "utf-8", errors="replace")
 
599
            return super(gnutls.Error, self).__init__(
577
600
                message, *args)
578
601
 
579
602
    class CertificateSecurityError(Error):
580
603
        pass
581
604
 
 
605
    class PointerTo:
 
606
        def __init__(self, cls):
 
607
            self.cls = cls
 
608
 
 
609
        def from_param(self, obj):
 
610
            if not isinstance(obj, self.cls):
 
611
                raise TypeError("Not of type {}: {!r}"
 
612
                                .format(self.cls.__name__, obj))
 
613
            return ctypes.byref(obj.from_param(obj))
 
614
 
 
615
    class CastToVoidPointer:
 
616
        def __init__(self, cls):
 
617
            self.cls = cls
 
618
 
 
619
        def from_param(self, obj):
 
620
            if not isinstance(obj, self.cls):
 
621
                raise TypeError("Not of type {}: {!r}"
 
622
                                .format(self.cls.__name__, obj))
 
623
            return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)
 
624
 
 
625
    class With_from_param:
 
626
        @classmethod
 
627
        def from_param(cls, obj):
 
628
            return obj._as_parameter_
 
629
 
582
630
    # Classes
583
 
    class Credentials(object):
 
631
    class Credentials(With_from_param):
584
632
        def __init__(self):
585
 
            self._c_object = gnutls.certificate_credentials_t()
586
 
            gnutls.certificate_allocate_credentials(
587
 
                ctypes.byref(self._c_object))
 
633
            self._as_parameter_ = gnutls.certificate_credentials_t()
 
634
            gnutls.certificate_allocate_credentials(self)
588
635
            self.type = gnutls.CRD_CERTIFICATE
589
636
 
590
637
        def __del__(self):
591
 
            gnutls.certificate_free_credentials(self._c_object)
 
638
            gnutls.certificate_free_credentials(self)
592
639
 
593
 
    class ClientSession(object):
 
640
    class ClientSession(With_from_param):
594
641
        def __init__(self, socket, credentials=None):
595
 
            self._c_object = gnutls.session_t()
596
 
            gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
597
 
            gnutls.set_default_priority(self._c_object)
598
 
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
 
            gnutls.handshake_set_private_extensions(self._c_object,
600
 
                                                    True)
 
642
            self._as_parameter_ = gnutls.session_t()
 
643
            gnutls_flags = gnutls.CLIENT
 
644
            if gnutls.check_version(b"3.5.6"):
 
645
                gnutls_flags |= gnutls.NO_TICKETS
 
646
            if gnutls.has_rawpk:
 
647
                gnutls_flags |= gnutls.ENABLE_RAWPK
 
648
            gnutls.init(self, gnutls_flags)
 
649
            del gnutls_flags
 
650
            gnutls.set_default_priority(self)
 
651
            gnutls.transport_set_ptr(self, socket.fileno())
 
652
            gnutls.handshake_set_private_extensions(self, True)
601
653
            self.socket = socket
602
654
            if credentials is None:
603
655
                credentials = gnutls.Credentials()
604
 
            gnutls.credentials_set(self._c_object, credentials.type,
605
 
                                   ctypes.cast(credentials._c_object,
606
 
                                               ctypes.c_void_p))
 
656
            gnutls.credentials_set(self, credentials.type,
 
657
                                   credentials)
607
658
            self.credentials = credentials
608
659
 
609
660
        def __del__(self):
610
 
            gnutls.deinit(self._c_object)
 
661
            gnutls.deinit(self)
611
662
 
612
663
        def handshake(self):
613
 
            return gnutls.handshake(self._c_object)
 
664
            return gnutls.handshake(self)
614
665
 
615
666
        def send(self, data):
616
667
            data = bytes(data)
617
668
            data_len = len(data)
618
669
            while data_len > 0:
619
 
                data_len -= gnutls.record_send(self._c_object,
620
 
                                               data[-data_len:],
 
670
                data_len -= gnutls.record_send(self, data[-data_len:],
621
671
                                               data_len)
622
672
 
623
673
        def bye(self):
624
 
            return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)
 
674
            return gnutls.bye(self, gnutls.SHUT_RDWR)
625
675
 
626
676
    # Error handling functions
627
677
    def _error_code(result):
628
678
        """A function to raise exceptions on errors, suitable
629
 
        for the 'restype' attribute on ctypes functions"""
630
 
        if result >= 0:
 
679
        for the "restype" attribute on ctypes functions"""
 
680
        if result >= gnutls.E_SUCCESS:
631
681
            return result
632
682
        if result == gnutls.E_NO_CERTIFICATE_FOUND:
633
683
            raise gnutls.CertificateSecurityError(code=result)
634
684
        raise gnutls.Error(code=result)
635
685
 
636
 
    def _retry_on_error(result, func, arguments):
 
686
    def _retry_on_error(result, func, arguments,
 
687
                        _error_code=_error_code):
637
688
        """A function to retry on some errors, suitable
638
 
        for the 'errcheck' attribute on ctypes functions"""
639
 
        while result < 0:
 
689
        for the "errcheck" attribute on ctypes functions"""
 
690
        while result < gnutls.E_SUCCESS:
640
691
            if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):
641
692
                return _error_code(result)
642
693
            result = func(*arguments)
647
698
 
648
699
    # Functions
649
700
    priority_set_direct = _library.gnutls_priority_set_direct
650
 
    priority_set_direct.argtypes = [session_t, ctypes.c_char_p,
 
701
    priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,
651
702
                                    ctypes.POINTER(ctypes.c_char_p)]
652
703
    priority_set_direct.restype = _error_code
653
704
 
654
705
    init = _library.gnutls_init
655
 
    init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]
 
706
    init.argtypes = [PointerTo(ClientSession), ctypes.c_int]
656
707
    init.restype = _error_code
657
708
 
658
709
    set_default_priority = _library.gnutls_set_default_priority
659
 
    set_default_priority.argtypes = [session_t]
 
710
    set_default_priority.argtypes = [ClientSession]
660
711
    set_default_priority.restype = _error_code
661
712
 
662
713
    record_send = _library.gnutls_record_send
663
 
    record_send.argtypes = [session_t, ctypes.c_void_p,
 
714
    record_send.argtypes = [ClientSession, ctypes.c_void_p,
664
715
                            ctypes.c_size_t]
665
716
    record_send.restype = ctypes.c_ssize_t
666
717
    record_send.errcheck = _retry_on_error
668
719
    certificate_allocate_credentials = (
669
720
        _library.gnutls_certificate_allocate_credentials)
670
721
    certificate_allocate_credentials.argtypes = [
671
 
        ctypes.POINTER(certificate_credentials_t)]
 
722
        PointerTo(Credentials)]
672
723
    certificate_allocate_credentials.restype = _error_code
673
724
 
674
725
    certificate_free_credentials = (
675
726
        _library.gnutls_certificate_free_credentials)
676
 
    certificate_free_credentials.argtypes = [
677
 
        certificate_credentials_t]
 
727
    certificate_free_credentials.argtypes = [Credentials]
678
728
    certificate_free_credentials.restype = None
679
729
 
680
730
    handshake_set_private_extensions = (
681
731
        _library.gnutls_handshake_set_private_extensions)
682
 
    handshake_set_private_extensions.argtypes = [session_t,
 
732
    handshake_set_private_extensions.argtypes = [ClientSession,
683
733
                                                 ctypes.c_int]
684
734
    handshake_set_private_extensions.restype = None
685
735
 
686
736
    credentials_set = _library.gnutls_credentials_set
687
 
    credentials_set.argtypes = [session_t, credentials_type_t,
688
 
                                ctypes.c_void_p]
 
737
    credentials_set.argtypes = [ClientSession, credentials_type_t,
 
738
                                CastToVoidPointer(Credentials)]
689
739
    credentials_set.restype = _error_code
690
740
 
691
741
    strerror = _library.gnutls_strerror
693
743
    strerror.restype = ctypes.c_char_p
694
744
 
695
745
    certificate_type_get = _library.gnutls_certificate_type_get
696
 
    certificate_type_get.argtypes = [session_t]
 
746
    certificate_type_get.argtypes = [ClientSession]
697
747
    certificate_type_get.restype = _error_code
698
748
 
699
749
    certificate_get_peers = _library.gnutls_certificate_get_peers
700
 
    certificate_get_peers.argtypes = [session_t,
 
750
    certificate_get_peers.argtypes = [ClientSession,
701
751
                                      ctypes.POINTER(ctypes.c_uint)]
702
752
    certificate_get_peers.restype = ctypes.POINTER(datum_t)
703
753
 
710
760
    global_set_log_function.restype = None
711
761
 
712
762
    deinit = _library.gnutls_deinit
713
 
    deinit.argtypes = [session_t]
 
763
    deinit.argtypes = [ClientSession]
714
764
    deinit.restype = None
715
765
 
716
766
    handshake = _library.gnutls_handshake
717
 
    handshake.argtypes = [session_t]
718
 
    handshake.restype = _error_code
 
767
    handshake.argtypes = [ClientSession]
 
768
    handshake.restype = ctypes.c_int
719
769
    handshake.errcheck = _retry_on_error
720
770
 
721
771
    transport_set_ptr = _library.gnutls_transport_set_ptr
722
 
    transport_set_ptr.argtypes = [session_t, transport_ptr_t]
 
772
    transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]
723
773
    transport_set_ptr.restype = None
724
774
 
725
775
    bye = _library.gnutls_bye
726
 
    bye.argtypes = [session_t, close_request_t]
727
 
    bye.restype = _error_code
 
776
    bye.argtypes = [ClientSession, close_request_t]
 
777
    bye.restype = ctypes.c_int
728
778
    bye.errcheck = _retry_on_error
729
779
 
730
780
    check_version = _library.gnutls_check_version
731
781
    check_version.argtypes = [ctypes.c_char_p]
732
782
    check_version.restype = ctypes.c_char_p
733
783
 
734
 
    # All the function declarations below are from gnutls/openpgp.h
735
 
 
736
 
    openpgp_crt_init = _library.gnutls_openpgp_crt_init
737
 
    openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
738
 
    openpgp_crt_init.restype = _error_code
739
 
 
740
 
    openpgp_crt_import = _library.gnutls_openpgp_crt_import
741
 
    openpgp_crt_import.argtypes = [openpgp_crt_t,
742
 
                                   ctypes.POINTER(datum_t),
743
 
                                   openpgp_crt_fmt_t]
744
 
    openpgp_crt_import.restype = _error_code
745
 
 
746
 
    openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
747
 
    openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
748
 
                                        ctypes.POINTER(ctypes.c_uint)]
749
 
    openpgp_crt_verify_self.restype = _error_code
750
 
 
751
 
    openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
752
 
    openpgp_crt_deinit.argtypes = [openpgp_crt_t]
753
 
    openpgp_crt_deinit.restype = None
754
 
 
755
 
    openpgp_crt_get_fingerprint = (
756
 
        _library.gnutls_openpgp_crt_get_fingerprint)
757
 
    openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
758
 
                                            ctypes.c_void_p,
759
 
                                            ctypes.POINTER(
760
 
                                                ctypes.c_size_t)]
761
 
    openpgp_crt_get_fingerprint.restype = _error_code
 
784
    _need_version = b"3.3.0"
 
785
    if check_version(_need_version) is None:
 
786
        raise self.Error("Needs GnuTLS {} or later"
 
787
                         .format(_need_version))
 
788
 
 
789
    _tls_rawpk_version = b"3.6.6"
 
790
    has_rawpk = bool(check_version(_tls_rawpk_version))
 
791
 
 
792
    if has_rawpk:
 
793
        # Types
 
794
        class pubkey_st(ctypes.Structure):
 
795
            _fields = []
 
796
        pubkey_t = ctypes.POINTER(pubkey_st)
 
797
 
 
798
        x509_crt_fmt_t = ctypes.c_int
 
799
 
 
800
        # All the function declarations below are from
 
801
        # gnutls/abstract.h
 
802
        pubkey_init = _library.gnutls_pubkey_init
 
803
        pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
 
804
        pubkey_init.restype = _error_code
 
805
 
 
806
        pubkey_import = _library.gnutls_pubkey_import
 
807
        pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
 
808
                                  x509_crt_fmt_t]
 
809
        pubkey_import.restype = _error_code
 
810
 
 
811
        pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
 
812
        pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
 
813
                                      ctypes.POINTER(ctypes.c_ubyte),
 
814
                                      ctypes.POINTER(ctypes.c_size_t)]
 
815
        pubkey_get_key_id.restype = _error_code
 
816
 
 
817
        pubkey_deinit = _library.gnutls_pubkey_deinit
 
818
        pubkey_deinit.argtypes = [pubkey_t]
 
819
        pubkey_deinit.restype = None
 
820
    else:
 
821
        # All the function declarations below are from
 
822
        # gnutls/openpgp.h
 
823
 
 
824
        openpgp_crt_init = _library.gnutls_openpgp_crt_init
 
825
        openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
 
826
        openpgp_crt_init.restype = _error_code
 
827
 
 
828
        openpgp_crt_import = _library.gnutls_openpgp_crt_import
 
829
        openpgp_crt_import.argtypes = [openpgp_crt_t,
 
830
                                       ctypes.POINTER(datum_t),
 
831
                                       openpgp_crt_fmt_t]
 
832
        openpgp_crt_import.restype = _error_code
 
833
 
 
834
        openpgp_crt_verify_self = \
 
835
            _library.gnutls_openpgp_crt_verify_self
 
836
        openpgp_crt_verify_self.argtypes = [
 
837
            openpgp_crt_t,
 
838
            ctypes.c_uint,
 
839
            ctypes.POINTER(ctypes.c_uint),
 
840
        ]
 
841
        openpgp_crt_verify_self.restype = _error_code
 
842
 
 
843
        openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
 
844
        openpgp_crt_deinit.argtypes = [openpgp_crt_t]
 
845
        openpgp_crt_deinit.restype = None
 
846
 
 
847
        openpgp_crt_get_fingerprint = (
 
848
            _library.gnutls_openpgp_crt_get_fingerprint)
 
849
        openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
 
850
                                                ctypes.c_void_p,
 
851
                                                ctypes.POINTER(
 
852
                                                    ctypes.c_size_t)]
 
853
        openpgp_crt_get_fingerprint.restype = _error_code
 
854
 
 
855
    if check_version(b"3.6.4"):
 
856
        certificate_type_get2 = _library.gnutls_certificate_type_get2
 
857
        certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]
 
858
        certificate_type_get2.restype = _error_code
762
859
 
763
860
    # Remove non-public functions
764
861
    del _error_code, _retry_on_error
765
 
# Create the global "gnutls" object, simulating a module
766
 
gnutls = GnuTLS()
767
862
 
768
863
 
769
864
def call_pipe(connection,       # : multiprocessing.Connection
777
872
    connection.close()
778
873
 
779
874
 
780
 
class Client(object):
 
875
class Client:
781
876
    """A representation of a client host served by this server.
782
877
 
783
878
    Attributes:
784
 
    approved:   bool(); 'None' if not yet approved/disapproved
 
879
    approved:   bool(); None if not yet approved/disapproved
785
880
    approval_delay: datetime.timedelta(); Time to wait for approval
786
881
    approval_duration: datetime.timedelta(); Duration of one approval
787
 
    checker:    subprocess.Popen(); a running checker process used
788
 
                                    to see if the client lives.
789
 
                                    'None' if no process is running.
 
882
    checker: multiprocessing.Process(); a running checker process used
 
883
             to see if the client lives. None if no process is
 
884
             running.
790
885
    checker_callback_tag: a GLib event source tag, or None
791
886
    checker_command: string; External command which is run to check
792
887
                     if client lives.  %() expansions are done at
800
895
    disable_initiator_tag: a GLib event source tag, or None
801
896
    enabled:    bool()
802
897
    fingerprint: string (40 or 32 hexadecimal digits); used to
803
 
                 uniquely identify the client
 
898
                 uniquely identify an OpenPGP client
 
899
    key_id: string (64 hexadecimal digits); used to uniquely identify
 
900
            a client using raw public keys
804
901
    host:       string; available for use by the checker command
805
902
    interval:   datetime.timedelta(); How often to start a new checker
806
903
    last_approval_request: datetime.datetime(); (UTC) or None
824
921
    """
825
922
 
826
923
    runtime_expansions = ("approval_delay", "approval_duration",
827
 
                          "created", "enabled", "expires",
 
924
                          "created", "enabled", "expires", "key_id",
828
925
                          "fingerprint", "host", "interval",
829
926
                          "last_approval_request", "last_checked_ok",
830
927
                          "last_enabled", "name", "timeout")
860
957
            client["enabled"] = config.getboolean(client_name,
861
958
                                                  "enabled")
862
959
 
863
 
            # Uppercase and remove spaces from fingerprint for later
864
 
            # comparison purposes with return value from the
865
 
            # fingerprint() function
 
960
            # Uppercase and remove spaces from key_id and fingerprint
 
961
            # for later comparison purposes with return value from the
 
962
            # key_id() and fingerprint() functions
 
963
            client["key_id"] = (section.get("key_id", "").upper()
 
964
                                .replace(" ", ""))
866
965
            client["fingerprint"] = (section["fingerprint"].upper()
867
966
                                     .replace(" ", ""))
868
967
            if "secret" in section:
912
1011
            self.expires = None
913
1012
 
914
1013
        logger.debug("Creating client %r", self.name)
 
1014
        logger.debug("  Key ID: %s", self.key_id)
915
1015
        logger.debug("  Fingerprint: %s", self.fingerprint)
916
1016
        self.created = settings.get("created",
917
1017
                                    datetime.datetime.utcnow())
981
1081
        if self.checker_initiator_tag is not None:
982
1082
            GLib.source_remove(self.checker_initiator_tag)
983
1083
        self.checker_initiator_tag = GLib.timeout_add(
984
 
            int(self.interval.total_seconds() * 1000),
 
1084
            random.randrange(int(self.interval.total_seconds() * 1000
 
1085
                                 + 1)),
985
1086
            self.start_checker)
986
1087
        # Schedule a disable() when 'timeout' has passed
987
1088
        if self.disable_initiator_tag is not None:
994
1095
    def checker_callback(self, source, condition, connection,
995
1096
                         command):
996
1097
        """The checker has completed, so take appropriate actions."""
997
 
        self.checker_callback_tag = None
998
 
        self.checker = None
999
1098
        # Read return code from connection (see call_pipe)
1000
1099
        returncode = connection.recv()
1001
1100
        connection.close()
 
1101
        if self.checker is not None:
 
1102
            self.checker.join()
 
1103
        self.checker_callback_tag = None
 
1104
        self.checker = None
1002
1105
 
1003
1106
        if returncode >= 0:
1004
1107
            self.last_checker_status = returncode
1060
1163
        if self.checker is None:
1061
1164
            # Escape attributes for the shell
1062
1165
            escaped_attrs = {
1063
 
                attr: re.escape(str(getattr(self, attr)))
 
1166
                attr: shlex.quote(str(getattr(self, attr)))
1064
1167
                for attr in self.runtime_expansions}
1065
1168
            try:
1066
1169
                command = self.checker_command % escaped_attrs
1093
1196
                kwargs=popen_args)
1094
1197
            self.checker.start()
1095
1198
            self.checker_callback_tag = GLib.io_add_watch(
1096
 
                pipe[0].fileno(), GLib.IO_IN,
 
1199
                GLib.IOChannel.unix_new(pipe[0].fileno()),
 
1200
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1097
1201
                self.checker_callback, pipe[0], command)
1098
1202
        # Re-run this periodically if run by GLib.timeout_add
1099
1203
        return True
1138
1242
        func._dbus_name = func.__name__
1139
1243
        if func._dbus_name.endswith("_dbus_property"):
1140
1244
            func._dbus_name = func._dbus_name[:-14]
1141
 
        func._dbus_get_args_options = {'byte_arrays': byte_arrays}
 
1245
        func._dbus_get_args_options = {"byte_arrays": byte_arrays}
1142
1246
        return func
1143
1247
 
1144
1248
    return decorator
1233
1337
 
1234
1338
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1235
1339
                         out_signature="s",
1236
 
                         path_keyword='object_path',
1237
 
                         connection_keyword='connection')
 
1340
                         path_keyword="object_path",
 
1341
                         connection_keyword="connection")
1238
1342
    def Introspect(self, object_path, connection):
1239
1343
        """Overloading of standard D-Bus method.
1240
1344
 
1354
1458
                raise ValueError("Byte arrays not supported for non-"
1355
1459
                                 "'ay' signature {!r}"
1356
1460
                                 .format(prop._dbus_signature))
1357
 
            value = dbus.ByteArray(b''.join(chr(byte)
1358
 
                                            for byte in value))
 
1461
            value = dbus.ByteArray(bytes(value))
1359
1462
        prop(value)
1360
1463
 
1361
1464
    @dbus.service.method(dbus.PROPERTIES_IFACE,
1394
1497
 
1395
1498
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1396
1499
                         out_signature="s",
1397
 
                         path_keyword='object_path',
1398
 
                         connection_keyword='connection')
 
1500
                         path_keyword="object_path",
 
1501
                         connection_keyword="connection")
1399
1502
    def Introspect(self, object_path, connection):
1400
1503
        """Overloading of standard D-Bus method.
1401
1504
 
1496
1599
 
1497
1600
    @dbus.service.method(dbus.INTROSPECTABLE_IFACE,
1498
1601
                         out_signature="s",
1499
 
                         path_keyword='object_path',
1500
 
                         connection_keyword='connection')
 
1602
                         path_keyword="object_path",
 
1603
                         connection_keyword="connection")
1501
1604
    def Introspect(self, object_path, connection):
1502
1605
        """Overloading of standard D-Bus method.
1503
1606
 
1999
2102
    def Name_dbus_property(self):
2000
2103
        return dbus.String(self.name)
2001
2104
 
 
2105
    # KeyID - property
 
2106
    @dbus_annotations(
 
2107
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
 
2108
    @dbus_service_property(_interface, signature="s", access="read")
 
2109
    def KeyID_dbus_property(self):
 
2110
        return dbus.String(self.key_id)
 
2111
 
2002
2112
    # Fingerprint - property
2003
2113
    @dbus_annotations(
2004
2114
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2159
2269
    del _interface
2160
2270
 
2161
2271
 
2162
 
class ProxyClient(object):
2163
 
    def __init__(self, child_pipe, fpr, address):
 
2272
class ProxyClient:
 
2273
    def __init__(self, child_pipe, key_id, fpr, address):
2164
2274
        self._pipe = child_pipe
2165
 
        self._pipe.send(('init', fpr, address))
 
2275
        self._pipe.send(("init", key_id, fpr, address))
2166
2276
        if not self._pipe.recv():
2167
 
            raise KeyError(fpr)
 
2277
            raise KeyError(key_id or fpr)
2168
2278
 
2169
2279
    def __getattribute__(self, name):
2170
 
        if name == '_pipe':
 
2280
        if name == "_pipe":
2171
2281
            return super(ProxyClient, self).__getattribute__(name)
2172
 
        self._pipe.send(('getattr', name))
 
2282
        self._pipe.send(("getattr", name))
2173
2283
        data = self._pipe.recv()
2174
 
        if data[0] == 'data':
 
2284
        if data[0] == "data":
2175
2285
            return data[1]
2176
 
        if data[0] == 'function':
 
2286
        if data[0] == "function":
2177
2287
 
2178
2288
            def func(*args, **kwargs):
2179
 
                self._pipe.send(('funcall', name, args, kwargs))
 
2289
                self._pipe.send(("funcall", name, args, kwargs))
2180
2290
                return self._pipe.recv()[1]
2181
2291
 
2182
2292
            return func
2183
2293
 
2184
2294
    def __setattr__(self, name, value):
2185
 
        if name == '_pipe':
 
2295
        if name == "_pipe":
2186
2296
            return super(ProxyClient, self).__setattr__(name, value)
2187
 
        self._pipe.send(('setattr', name, value))
 
2297
        self._pipe.send(("setattr", name, value))
2188
2298
 
2189
2299
 
2190
2300
class ClientHandler(socketserver.BaseRequestHandler, object):
2202
2312
 
2203
2313
            session = gnutls.ClientSession(self.request)
2204
2314
 
2205
 
            # priority = ':'.join(("NONE", "+VERS-TLS1.1",
 
2315
            # priority = ":".join(("NONE", "+VERS-TLS1.1",
2206
2316
            #                       "+AES-256-CBC", "+SHA1",
2207
2317
            #                       "+COMP-NULL", "+CTYPE-OPENPGP",
2208
2318
            #                       "+DHE-DSS"))
2210
2320
            priority = self.server.gnutls_priority
2211
2321
            if priority is None:
2212
2322
                priority = "NORMAL"
2213
 
            gnutls.priority_set_direct(session._c_object,
2214
 
                                       priority.encode("utf-8"),
2215
 
                                       None)
 
2323
            gnutls.priority_set_direct(session,
 
2324
                                       priority.encode("utf-8"), None)
2216
2325
 
2217
2326
            # Start communication using the Mandos protocol
2218
2327
            # Get protocol number
2237
2346
 
2238
2347
            approval_required = False
2239
2348
            try:
2240
 
                try:
2241
 
                    fpr = self.fingerprint(
2242
 
                        self.peer_certificate(session))
2243
 
                except (TypeError, gnutls.Error) as error:
2244
 
                    logger.warning("Bad certificate: %s", error)
2245
 
                    return
2246
 
                logger.debug("Fingerprint: %s", fpr)
2247
 
 
2248
 
                try:
2249
 
                    client = ProxyClient(child_pipe, fpr,
 
2349
                if gnutls.has_rawpk:
 
2350
                    fpr = b""
 
2351
                    try:
 
2352
                        key_id = self.key_id(
 
2353
                            self.peer_certificate(session))
 
2354
                    except (TypeError, gnutls.Error) as error:
 
2355
                        logger.warning("Bad certificate: %s", error)
 
2356
                        return
 
2357
                    logger.debug("Key ID: %s",
 
2358
                                 key_id.decode("utf-8",
 
2359
                                               errors="replace"))
 
2360
 
 
2361
                else:
 
2362
                    key_id = b""
 
2363
                    try:
 
2364
                        fpr = self.fingerprint(
 
2365
                            self.peer_certificate(session))
 
2366
                    except (TypeError, gnutls.Error) as error:
 
2367
                        logger.warning("Bad certificate: %s", error)
 
2368
                        return
 
2369
                    logger.debug("Fingerprint: %s", fpr)
 
2370
 
 
2371
                try:
 
2372
                    client = ProxyClient(child_pipe, key_id, fpr,
2250
2373
                                         self.client_address)
2251
2374
                except KeyError:
2252
2375
                    return
2329
2452
 
2330
2453
    @staticmethod
2331
2454
    def peer_certificate(session):
2332
 
        "Return the peer's OpenPGP certificate as a bytestring"
2333
 
        # If not an OpenPGP certificate...
2334
 
        if (gnutls.certificate_type_get(session._c_object)
2335
 
            != gnutls.CRT_OPENPGP):
 
2455
        "Return the peer's certificate as a bytestring"
 
2456
        try:
 
2457
            cert_type = gnutls.certificate_type_get2(
 
2458
                session, gnutls.CTYPE_PEERS)
 
2459
        except AttributeError:
 
2460
            cert_type = gnutls.certificate_type_get(session)
 
2461
        if gnutls.has_rawpk:
 
2462
            valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
 
2463
        else:
 
2464
            valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
 
2465
        # If not a valid certificate type...
 
2466
        if cert_type not in valid_cert_types:
 
2467
            logger.info("Cert type %r not in %r", cert_type,
 
2468
                        valid_cert_types)
2336
2469
            # ...return invalid data
2337
2470
            return b""
2338
2471
        list_size = ctypes.c_uint(1)
2339
2472
        cert_list = (gnutls.certificate_get_peers
2340
 
                     (session._c_object, ctypes.byref(list_size)))
 
2473
                     (session, ctypes.byref(list_size)))
2341
2474
        if not bool(cert_list) and list_size.value != 0:
2342
2475
            raise gnutls.Error("error getting peer certificate")
2343
2476
        if list_size.value == 0:
2346
2479
        return ctypes.string_at(cert.data, cert.size)
2347
2480
 
2348
2481
    @staticmethod
 
2482
    def key_id(certificate):
 
2483
        "Convert a certificate bytestring to a hexdigit key ID"
 
2484
        # New GnuTLS "datum" with the public key
 
2485
        datum = gnutls.datum_t(
 
2486
            ctypes.cast(ctypes.c_char_p(certificate),
 
2487
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2488
            ctypes.c_uint(len(certificate)))
 
2489
        # XXX all these need to be created in the gnutls "module"
 
2490
        # New empty GnuTLS certificate
 
2491
        pubkey = gnutls.pubkey_t()
 
2492
        gnutls.pubkey_init(ctypes.byref(pubkey))
 
2493
        # Import the raw public key into the certificate
 
2494
        gnutls.pubkey_import(pubkey,
 
2495
                             ctypes.byref(datum),
 
2496
                             gnutls.X509_FMT_DER)
 
2497
        # New buffer for the key ID
 
2498
        buf = ctypes.create_string_buffer(32)
 
2499
        buf_len = ctypes.c_size_t(len(buf))
 
2500
        # Get the key ID from the raw public key into the buffer
 
2501
        gnutls.pubkey_get_key_id(
 
2502
            pubkey,
 
2503
            gnutls.KEYID_USE_SHA256,
 
2504
            ctypes.cast(ctypes.byref(buf),
 
2505
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2506
            ctypes.byref(buf_len))
 
2507
        # Deinit the certificate
 
2508
        gnutls.pubkey_deinit(pubkey)
 
2509
 
 
2510
        # Convert the buffer to a Python bytestring
 
2511
        key_id = ctypes.string_at(buf, buf_len.value)
 
2512
        # Convert the bytestring to hexadecimal notation
 
2513
        hex_key_id = binascii.hexlify(key_id).upper()
 
2514
        return hex_key_id
 
2515
 
 
2516
    @staticmethod
2349
2517
    def fingerprint(openpgp):
2350
2518
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
2351
2519
        # New GnuTLS "datum" with the OpenPGP public key
2382
2550
        return hex_fpr
2383
2551
 
2384
2552
 
2385
 
class MultiprocessingMixIn(object):
 
2553
class MultiprocessingMixIn:
2386
2554
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
2387
2555
 
2388
2556
    def sub_process_main(self, request, address):
2400
2568
        return proc
2401
2569
 
2402
2570
 
2403
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
 
2571
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2404
2572
    """ adds a pipe to the MixIn """
2405
2573
 
2406
2574
    def process_request(self, request, client_address):
2421
2589
 
2422
2590
 
2423
2591
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2424
 
                     socketserver.TCPServer, object):
2425
 
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
 
2592
                     socketserver.TCPServer):
 
2593
    """IPv6-capable TCP server.  Accepts None as address and/or port
2426
2594
 
2427
2595
    Attributes:
2428
2596
        enabled:        Boolean; whether this server is activated yet
2500
2668
                    raise
2501
2669
        # Only bind(2) the socket if we really need to.
2502
2670
        if self.server_address[0] or self.server_address[1]:
 
2671
            if self.server_address[1]:
 
2672
                self.allow_reuse_address = True
2503
2673
            if not self.server_address[0]:
2504
2674
                if self.address_family == socket.AF_INET6:
2505
2675
                    any_address = "::"  # in6addr_any
2558
2728
    def add_pipe(self, parent_pipe, proc):
2559
2729
        # Call "handle_ipc" for both data and EOF events
2560
2730
        GLib.io_add_watch(
2561
 
            parent_pipe.fileno(),
2562
 
            GLib.IO_IN | GLib.IO_HUP,
 
2731
            GLib.IOChannel.unix_new(parent_pipe.fileno()),
 
2732
            GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2563
2733
            functools.partial(self.handle_ipc,
2564
2734
                              parent_pipe=parent_pipe,
2565
2735
                              proc=proc))
2578
2748
        request = parent_pipe.recv()
2579
2749
        command = request[0]
2580
2750
 
2581
 
        if command == 'init':
2582
 
            fpr = request[1].decode("ascii")
2583
 
            address = request[2]
 
2751
        if command == "init":
 
2752
            key_id = request[1].decode("ascii")
 
2753
            fpr = request[2].decode("ascii")
 
2754
            address = request[3]
2584
2755
 
2585
2756
            for c in self.clients.values():
2586
 
                if c.fingerprint == fpr:
 
2757
                if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"
 
2758
                              "27AE41E4649B934CA495991B7852B855"):
 
2759
                    continue
 
2760
                if key_id and c.key_id == key_id:
 
2761
                    client = c
 
2762
                    break
 
2763
                if fpr and c.fingerprint == fpr:
2587
2764
                    client = c
2588
2765
                    break
2589
2766
            else:
2590
 
                logger.info("Client not found for fingerprint: %s, ad"
2591
 
                            "dress: %s", fpr, address)
 
2767
                logger.info("Client not found for key ID: %s, address"
 
2768
                            ": %s", key_id or fpr, address)
2592
2769
                if self.use_dbus:
2593
2770
                    # Emit D-Bus signal
2594
 
                    mandos_dbus_service.ClientNotFound(fpr,
 
2771
                    mandos_dbus_service.ClientNotFound(key_id or fpr,
2595
2772
                                                       address[0])
2596
2773
                parent_pipe.send(False)
2597
2774
                return False
2598
2775
 
2599
2776
            GLib.io_add_watch(
2600
 
                parent_pipe.fileno(),
2601
 
                GLib.IO_IN | GLib.IO_HUP,
 
2777
                GLib.IOChannel.unix_new(parent_pipe.fileno()),
 
2778
                GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2602
2779
                functools.partial(self.handle_ipc,
2603
2780
                                  parent_pipe=parent_pipe,
2604
2781
                                  proc=proc,
2607
2784
            # remove the old hook in favor of the new above hook on
2608
2785
            # same fileno
2609
2786
            return False
2610
 
        if command == 'funcall':
 
2787
        if command == "funcall":
2611
2788
            funcname = request[1]
2612
2789
            args = request[2]
2613
2790
            kwargs = request[3]
2614
2791
 
2615
 
            parent_pipe.send(('data', getattr(client_object,
 
2792
            parent_pipe.send(("data", getattr(client_object,
2616
2793
                                              funcname)(*args,
2617
2794
                                                        **kwargs)))
2618
2795
 
2619
 
        if command == 'getattr':
 
2796
        if command == "getattr":
2620
2797
            attrname = request[1]
2621
2798
            if isinstance(client_object.__getattribute__(attrname),
2622
 
                          collections.Callable):
2623
 
                parent_pipe.send(('function', ))
 
2799
                          collections.abc.Callable):
 
2800
                parent_pipe.send(("function", ))
2624
2801
            else:
2625
2802
                parent_pipe.send((
2626
 
                    'data', client_object.__getattribute__(attrname)))
 
2803
                    "data", client_object.__getattribute__(attrname)))
2627
2804
 
2628
 
        if command == 'setattr':
 
2805
        if command == "setattr":
2629
2806
            attrname = request[1]
2630
2807
            value = request[2]
2631
2808
            setattr(client_object, attrname, value)
2636
2813
def rfc3339_duration_to_delta(duration):
2637
2814
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2638
2815
 
2639
 
    >>> rfc3339_duration_to_delta("P7D")
2640
 
    datetime.timedelta(7)
2641
 
    >>> rfc3339_duration_to_delta("PT60S")
2642
 
    datetime.timedelta(0, 60)
2643
 
    >>> rfc3339_duration_to_delta("PT60M")
2644
 
    datetime.timedelta(0, 3600)
2645
 
    >>> rfc3339_duration_to_delta("PT24H")
2646
 
    datetime.timedelta(1)
2647
 
    >>> rfc3339_duration_to_delta("P1W")
2648
 
    datetime.timedelta(7)
2649
 
    >>> rfc3339_duration_to_delta("PT5M30S")
2650
 
    datetime.timedelta(0, 330)
2651
 
    >>> rfc3339_duration_to_delta("P1DT3M20S")
2652
 
    datetime.timedelta(1, 200)
 
2816
    >>> timedelta = datetime.timedelta
 
2817
    >>> rfc3339_duration_to_delta("P7D") == timedelta(7)
 
2818
    True
 
2819
    >>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
 
2820
    True
 
2821
    >>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
 
2822
    True
 
2823
    >>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
 
2824
    True
 
2825
    >>> rfc3339_duration_to_delta("P1W") == timedelta(7)
 
2826
    True
 
2827
    >>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
 
2828
    True
 
2829
    >>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
 
2830
    True
 
2831
    >>> del timedelta
2653
2832
    """
2654
2833
 
2655
2834
    # Parsing an RFC 3339 duration with regular expressions is not
2735
2914
def string_to_delta(interval):
2736
2915
    """Parse a string and return a datetime.timedelta
2737
2916
 
2738
 
    >>> string_to_delta('7d')
2739
 
    datetime.timedelta(7)
2740
 
    >>> string_to_delta('60s')
2741
 
    datetime.timedelta(0, 60)
2742
 
    >>> string_to_delta('60m')
2743
 
    datetime.timedelta(0, 3600)
2744
 
    >>> string_to_delta('24h')
2745
 
    datetime.timedelta(1)
2746
 
    >>> string_to_delta('1w')
2747
 
    datetime.timedelta(7)
2748
 
    >>> string_to_delta('5m 30s')
2749
 
    datetime.timedelta(0, 330)
 
2917
    >>> string_to_delta("7d") == datetime.timedelta(7)
 
2918
    True
 
2919
    >>> string_to_delta("60s") == datetime.timedelta(0, 60)
 
2920
    True
 
2921
    >>> string_to_delta("60m") == datetime.timedelta(0, 3600)
 
2922
    True
 
2923
    >>> string_to_delta("24h") == datetime.timedelta(1)
 
2924
    True
 
2925
    >>> string_to_delta("1w") == datetime.timedelta(7)
 
2926
    True
 
2927
    >>> string_to_delta("5m 30s") == datetime.timedelta(0, 330)
 
2928
    True
2750
2929
    """
2751
2930
 
2752
2931
    try:
2854
3033
 
2855
3034
    options = parser.parse_args()
2856
3035
 
2857
 
    if options.check:
2858
 
        import doctest
2859
 
        fail_count, test_count = doctest.testmod()
2860
 
        sys.exit(os.EX_OK if fail_count == 0 else 1)
2861
 
 
2862
3036
    # Default values for config file for server-global settings
 
3037
    if gnutls.has_rawpk:
 
3038
        priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
 
3039
                    ":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
 
3040
    else:
 
3041
        priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
3042
                    ":+SIGN-DSA-SHA256")
2863
3043
    server_defaults = {"interface": "",
2864
3044
                       "address": "",
2865
3045
                       "port": "",
2866
3046
                       "debug": "False",
2867
 
                       "priority":
2868
 
                       "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2869
 
                       ":+SIGN-DSA-SHA256",
 
3047
                       "priority": priority,
2870
3048
                       "servicename": "Mandos",
2871
3049
                       "use_dbus": "True",
2872
3050
                       "use_ipv6": "True",
2877
3055
                       "foreground": "False",
2878
3056
                       "zeroconf": "True",
2879
3057
                       }
 
3058
    del priority
2880
3059
 
2881
3060
    # Parse config file for server-global settings
2882
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
3061
    server_config = configparser.ConfigParser(server_defaults)
2883
3062
    del server_defaults
2884
3063
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2885
 
    # Convert the SafeConfigParser object to a dict
 
3064
    # Convert the ConfigParser object to a dict
2886
3065
    server_settings = server_config.defaults()
2887
3066
    # Use the appropriate methods on the non-string config options
2888
3067
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2955
3134
 
2956
3135
    if server_settings["servicename"] != "Mandos":
2957
3136
        syslogger.setFormatter(
2958
 
            logging.Formatter('Mandos ({}) [%(process)d]:'
2959
 
                              ' %(levelname)s: %(message)s'.format(
 
3137
            logging.Formatter("Mandos ({}) [%(process)d]:"
 
3138
                              " %(levelname)s: %(message)s".format(
2960
3139
                                  server_settings["servicename"])))
2961
3140
 
2962
3141
    # Parse config file with clients
2963
 
    client_config = configparser.SafeConfigParser(Client
2964
 
                                                  .client_defaults)
 
3142
    client_config = configparser.ConfigParser(Client.client_defaults)
2965
3143
    client_config.read(os.path.join(server_settings["configdir"],
2966
3144
                                    "clients.conf"))
2967
3145
 
3023
3201
 
3024
3202
        @gnutls.log_func
3025
3203
        def debug_gnutls(level, string):
3026
 
            logger.debug("GnuTLS: %s", string[:-1])
 
3204
            logger.debug("GnuTLS: %s",
 
3205
                         string[:-1].decode("utf-8",
 
3206
                                            errors="replace"))
3027
3207
 
3028
3208
        gnutls.global_set_log_function(debug_gnutls)
3029
3209
 
3038
3218
        # Close all input and output, do double fork, etc.
3039
3219
        daemon()
3040
3220
 
3041
 
    # multiprocessing will use threads, so before we use GLib we need
3042
 
    # to inform GLib that threads will be used.
3043
 
    GLib.threads_init()
 
3221
    if gi.version_info < (3, 10, 2):
 
3222
        # multiprocessing will use threads, so before we use GLib we
 
3223
        # need to inform GLib that threads will be used.
 
3224
        GLib.threads_init()
3044
3225
 
3045
3226
    global main_loop
3046
3227
    # From the Avahi example code
3122
3303
                             if isinstance(s, bytes)
3123
3304
                             else s) for s in
3124
3305
                            value["client_structure"]]
3125
 
                        # .name & .host
3126
 
                        for k in ("name", "host"):
 
3306
                        # .name, .host, and .checker_command
 
3307
                        for k in ("name", "host", "checker_command"):
3127
3308
                            if isinstance(value[k], bytes):
3128
3309
                                value[k] = value[k].decode("utf-8")
 
3310
                        if "key_id" not in value:
 
3311
                            value["key_id"] = ""
 
3312
                        elif "fingerprint" not in value:
 
3313
                            value["fingerprint"] = ""
3129
3314
                    #  old_client_settings
3130
3315
                    # .keys()
3131
3316
                    old_client_settings = {
3135
3320
                        for key, value in
3136
3321
                        bytes_old_client_settings.items()}
3137
3322
                    del bytes_old_client_settings
3138
 
                    # .host
 
3323
                    # .host and .checker_command
3139
3324
                    for value in old_client_settings.values():
3140
 
                        if isinstance(value["host"], bytes):
3141
 
                            value["host"] = (value["host"]
3142
 
                                             .decode("utf-8"))
 
3325
                        for attribute in ("host", "checker_command"):
 
3326
                            if isinstance(value[attribute], bytes):
 
3327
                                value[attribute] = (value[attribute]
 
3328
                                                    .decode("utf-8"))
3143
3329
            os.remove(stored_state_path)
3144
3330
        except IOError as e:
3145
3331
            if e.errno == errno.ENOENT:
3268
3454
                pass
3269
3455
 
3270
3456
            @dbus.service.signal(_interface, signature="ss")
3271
 
            def ClientNotFound(self, fingerprint, address):
 
3457
            def ClientNotFound(self, key_id, address):
3272
3458
                "D-Bus signal"
3273
3459
                pass
3274
3460
 
3398
3584
 
3399
3585
        try:
3400
3586
            with tempfile.NamedTemporaryFile(
3401
 
                    mode='wb',
 
3587
                    mode="wb",
3402
3588
                    suffix=".pickle",
3403
 
                    prefix='clients-',
 
3589
                    prefix="clients-",
3404
3590
                    dir=os.path.dirname(stored_state_path),
3405
3591
                    delete=False) as stored_state:
3406
3592
                pickle.dump((clients, client_settings), stored_state,
3470
3656
                sys.exit(1)
3471
3657
            # End of Avahi example code
3472
3658
 
3473
 
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
3474
 
                          lambda *args, **kwargs:
3475
 
                          (tcp_server.handle_request
3476
 
                           (*args[2:], **kwargs) or True))
 
3659
        GLib.io_add_watch(
 
3660
            GLib.IOChannel.unix_new(tcp_server.fileno()),
 
3661
            GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
3662
            lambda *args, **kwargs: (tcp_server.handle_request
 
3663
                                     (*args[2:], **kwargs) or True))
3477
3664
 
3478
3665
        logger.debug("Starting main loop")
3479
3666
        main_loop.run()
3489
3676
    # Must run before the D-Bus bus name gets deregistered
3490
3677
    cleanup()
3491
3678
 
3492
 
 
3493
 
if __name__ == '__main__':
3494
 
    main()
 
3679
 
 
3680
def should_only_run_tests():
 
3681
    parser = argparse.ArgumentParser(add_help=False)
 
3682
    parser.add_argument("--check", action="store_true")
 
3683
    args, unknown_args = parser.parse_known_args()
 
3684
    run_tests = args.check
 
3685
    if run_tests:
 
3686
        # Remove --check argument from sys.argv
 
3687
        sys.argv[1:] = unknown_args
 
3688
    return run_tests
 
3689
 
 
3690
# Add all tests from doctest strings
 
3691
def load_tests(loader, tests, none):
 
3692
    import doctest
 
3693
    tests.addTests(doctest.DocTestSuite())
 
3694
    return tests
 
3695
 
 
3696
if __name__ == "__main__":
 
3697
    try:
 
3698
        if should_only_run_tests():
 
3699
            # Call using ./mandos --check [--verbose]
 
3700
            unittest.main()
 
3701
        else:
 
3702
            main()
 
3703
    finally:
 
3704
        logging.shutdown()