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  • Committer: Teddy Hogeborn
  • Date: 2018-02-12 15:03:06 UTC
  • Revision ID: teddy@recompile.se-20180212150306-x1bpg7rqb3xk4hog
Tags: version-1.7.18-1
* Makefile (version): Change to 1.7.18.
* NEWS (Version 1.7.18): Add new entry.
* debian/changelog (1.7.18-1): - '' -

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mandos
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 -*-
 
1
#!/usr/bin/python
 
2
# -*- mode: python; 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 © 2008-2020 Teddy Hogeborn
15
 
# Copyright © 2008-2020 Björn Påhlsson
 
14
# Copyright © 2008-2018 Teddy Hogeborn
 
15
# Copyright © 2008-2018 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
83
80
 
84
81
import dbus
85
82
import dbus.service
86
 
import gi
87
83
from gi.repository import GLib
88
84
from dbus.mainloop.glib import DBusGMainLoop
89
85
import ctypes
91
87
import xml.dom.minidom
92
88
import inspect
93
89
 
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
 
 
118
90
# Try to find the value of SO_BINDTODEVICE:
119
91
try:
120
92
    # This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and
140
112
            # No value found
141
113
            SO_BINDTODEVICE = None
142
114
 
143
 
if sys.version_info < (3, 2):
144
 
    configparser.Configparser = configparser.SafeConfigParser
 
115
if sys.version_info.major == 2:
 
116
    str = unicode
145
117
 
146
 
version = "1.8.12"
 
118
version = "1.7.18"
147
119
stored_state_file = "clients.pickle"
148
120
 
149
121
logger = logging.getLogger()
150
 
logging.captureWarnings(True)   # Show warnings via the logging system
151
122
syslogger = None
152
123
 
153
124
try:
208
179
    pass
209
180
 
210
181
 
211
 
class PGPEngine:
 
182
class PGPEngine(object):
212
183
    """A simple class for OpenPGP symmetric encryption & decryption"""
213
184
 
214
185
    def __init__(self):
218
189
            output = subprocess.check_output(["gpgconf"])
219
190
            for line in output.splitlines():
220
191
                name, text, path = line.split(b":")
221
 
                if name == b"gpg":
 
192
                if name == "gpg":
222
193
                    self.gpg = path
223
194
                    break
224
195
        except OSError as e:
229
200
                          '--force-mdc',
230
201
                          '--quiet']
231
202
        # Only GPG version 1 has the --no-use-agent option.
232
 
        if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):
 
203
        if self.gpg == "gpg" or self.gpg.endswith("/gpg"):
233
204
            self.gnupgargs.append("--no-use-agent")
234
205
 
235
206
    def __enter__(self):
304
275
 
305
276
 
306
277
# Pretend that we have an Avahi module
307
 
class avahi:
308
 
    """This isn't so much a class as it is a module-like namespace."""
 
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."""
309
281
    IF_UNSPEC = -1               # avahi-common/address.h
310
282
    PROTO_UNSPEC = -1            # avahi-common/address.h
311
283
    PROTO_INET = 0               # avahi-common/address.h
315
287
    DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"
316
288
    DBUS_PATH_SERVER = "/"
317
289
 
318
 
    @staticmethod
319
 
    def string_array_to_txt_array(t):
 
290
    def string_array_to_txt_array(self, t):
320
291
        return dbus.Array((dbus.ByteArray(s.encode("utf-8"))
321
292
                           for s in t), signature="ay")
322
293
    ENTRY_GROUP_ESTABLISHED = 2  # avahi-common/defs.h
327
298
    SERVER_RUNNING = 2           # avahi-common/defs.h
328
299
    SERVER_COLLISION = 3         # avahi-common/defs.h
329
300
    SERVER_FAILURE = 4           # avahi-common/defs.h
 
301
avahi = Avahi()
330
302
 
331
303
 
332
304
class AvahiError(Exception):
344
316
    pass
345
317
 
346
318
 
347
 
class AvahiService:
 
319
class AvahiService(object):
348
320
    """An Avahi (Zeroconf) service.
349
321
 
350
322
    Attributes:
524
496
class AvahiServiceToSyslog(AvahiService):
525
497
    def rename(self, *args, **kwargs):
526
498
        """Add the new name to the syslog messages"""
527
 
        ret = super(AvahiServiceToSyslog, self).rename(*args,
528
 
                                                       **kwargs)
 
499
        ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)
529
500
        syslogger.setFormatter(logging.Formatter(
530
501
            'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'
531
502
            .format(self.name)))
533
504
 
534
505
 
535
506
# Pretend that we have a GnuTLS module
536
 
class gnutls:
537
 
    """This isn't so much a class as it is a module-like namespace."""
 
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."""
538
510
 
539
511
    library = ctypes.util.find_library("gnutls")
540
512
    if library is None:
541
513
        library = ctypes.util.find_library("gnutls-deb0")
542
514
    _library = ctypes.cdll.LoadLibrary(library)
543
515
    del library
 
516
    _need_version = b"3.3.0"
 
517
 
 
518
    def __init__(self):
 
519
        # Need to use "self" here, since this method is called before
 
520
        # the assignment to the "gnutls" global variable happens.
 
521
        if self.check_version(self._need_version) is None:
 
522
            raise self.Error("Needs GnuTLS {} or later"
 
523
                             .format(self._need_version))
544
524
 
545
525
    # Unless otherwise indicated, the constants and types below are
546
526
    # all from the gnutls/gnutls.h C header file.
550
530
    E_INTERRUPTED = -52
551
531
    E_AGAIN = -28
552
532
    CRT_OPENPGP = 2
553
 
    CRT_RAWPK = 3
554
533
    CLIENT = 2
555
534
    SHUT_RDWR = 0
556
535
    CRD_CERTIFICATE = 1
557
536
    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
563
537
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
564
538
 
565
539
    # Types
588
562
 
589
563
    # Exceptions
590
564
    class Error(Exception):
 
565
        # We need to use the class name "GnuTLS" here, since this
 
566
        # exception might be raised from within GnuTLS.__init__,
 
567
        # which is called before the assignment to the "gnutls"
 
568
        # global variable has happened.
591
569
        def __init__(self, message=None, code=None, args=()):
592
570
            # Default usage is by a message string, but if a return
593
571
            # code is passed, convert it to a string with
594
572
            # gnutls.strerror()
595
573
            self.code = code
596
574
            if message is None and code is not None:
597
 
                message = gnutls.strerror(code)
598
 
            return super(gnutls.Error, self).__init__(
 
575
                message = GnuTLS.strerror(code)
 
576
            return super(GnuTLS.Error, self).__init__(
599
577
                message, *args)
600
578
 
601
579
    class CertificateSecurityError(Error):
602
580
        pass
603
581
 
604
582
    # Classes
605
 
    class Credentials:
 
583
    class Credentials(object):
606
584
        def __init__(self):
607
585
            self._c_object = gnutls.certificate_credentials_t()
608
586
            gnutls.certificate_allocate_credentials(
612
590
        def __del__(self):
613
591
            gnutls.certificate_free_credentials(self._c_object)
614
592
 
615
 
    class ClientSession:
 
593
    class ClientSession(object):
616
594
        def __init__(self, socket, credentials=None):
617
595
            self._c_object = gnutls.session_t()
618
 
            gnutls_flags = gnutls.CLIENT
619
 
            if gnutls.check_version(b"3.5.6"):
620
 
                gnutls_flags |= gnutls.NO_TICKETS
621
 
            if gnutls.has_rawpk:
622
 
                gnutls_flags |= gnutls.ENABLE_RAWPK
623
 
            gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
624
 
            del gnutls_flags
 
596
            gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
625
597
            gnutls.set_default_priority(self._c_object)
626
598
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
627
599
            gnutls.handshake_set_private_extensions(self._c_object,
759
731
    check_version.argtypes = [ctypes.c_char_p]
760
732
    check_version.restype = ctypes.c_char_p
761
733
 
762
 
    _need_version = b"3.3.0"
763
 
    if check_version(_need_version) is None:
764
 
        raise self.Error("Needs GnuTLS {} or later"
765
 
                         .format(_need_version))
766
 
 
767
 
    _tls_rawpk_version = b"3.6.6"
768
 
    has_rawpk = bool(check_version(_tls_rawpk_version))
769
 
 
770
 
    if has_rawpk:
771
 
        # Types
772
 
        class pubkey_st(ctypes.Structure):
773
 
            _fields = []
774
 
        pubkey_t = ctypes.POINTER(pubkey_st)
775
 
 
776
 
        x509_crt_fmt_t = ctypes.c_int
777
 
 
778
 
        # All the function declarations below are from
779
 
        # gnutls/abstract.h
780
 
        pubkey_init = _library.gnutls_pubkey_init
781
 
        pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
782
 
        pubkey_init.restype = _error_code
783
 
 
784
 
        pubkey_import = _library.gnutls_pubkey_import
785
 
        pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
786
 
                                  x509_crt_fmt_t]
787
 
        pubkey_import.restype = _error_code
788
 
 
789
 
        pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
790
 
        pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
791
 
                                      ctypes.POINTER(ctypes.c_ubyte),
792
 
                                      ctypes.POINTER(ctypes.c_size_t)]
793
 
        pubkey_get_key_id.restype = _error_code
794
 
 
795
 
        pubkey_deinit = _library.gnutls_pubkey_deinit
796
 
        pubkey_deinit.argtypes = [pubkey_t]
797
 
        pubkey_deinit.restype = None
798
 
    else:
799
 
        # All the function declarations below are from
800
 
        # gnutls/openpgp.h
801
 
 
802
 
        openpgp_crt_init = _library.gnutls_openpgp_crt_init
803
 
        openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
804
 
        openpgp_crt_init.restype = _error_code
805
 
 
806
 
        openpgp_crt_import = _library.gnutls_openpgp_crt_import
807
 
        openpgp_crt_import.argtypes = [openpgp_crt_t,
808
 
                                       ctypes.POINTER(datum_t),
809
 
                                       openpgp_crt_fmt_t]
810
 
        openpgp_crt_import.restype = _error_code
811
 
 
812
 
        openpgp_crt_verify_self = \
813
 
            _library.gnutls_openpgp_crt_verify_self
814
 
        openpgp_crt_verify_self.argtypes = [
815
 
            openpgp_crt_t,
816
 
            ctypes.c_uint,
817
 
            ctypes.POINTER(ctypes.c_uint),
818
 
        ]
819
 
        openpgp_crt_verify_self.restype = _error_code
820
 
 
821
 
        openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
822
 
        openpgp_crt_deinit.argtypes = [openpgp_crt_t]
823
 
        openpgp_crt_deinit.restype = None
824
 
 
825
 
        openpgp_crt_get_fingerprint = (
826
 
            _library.gnutls_openpgp_crt_get_fingerprint)
827
 
        openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
828
 
                                                ctypes.c_void_p,
829
 
                                                ctypes.POINTER(
830
 
                                                    ctypes.c_size_t)]
831
 
        openpgp_crt_get_fingerprint.restype = _error_code
832
 
 
833
 
    if check_version(b"3.6.4"):
834
 
        certificate_type_get2 = _library.gnutls_certificate_type_get2
835
 
        certificate_type_get2.argtypes = [session_t, ctypes.c_int]
836
 
        certificate_type_get2.restype = _error_code
 
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
837
762
 
838
763
    # Remove non-public functions
839
764
    del _error_code, _retry_on_error
 
765
# Create the global "gnutls" object, simulating a module
 
766
gnutls = GnuTLS()
840
767
 
841
768
 
842
769
def call_pipe(connection,       # : multiprocessing.Connection
850
777
    connection.close()
851
778
 
852
779
 
853
 
class Client:
 
780
class Client(object):
854
781
    """A representation of a client host served by this server.
855
782
 
856
783
    Attributes:
857
784
    approved:   bool(); 'None' if not yet approved/disapproved
858
785
    approval_delay: datetime.timedelta(); Time to wait for approval
859
786
    approval_duration: datetime.timedelta(); Duration of one approval
860
 
    checker: multiprocessing.Process(); a running checker process used
861
 
             to see if the client lives. 'None' if no process is
862
 
             running.
 
787
    checker:    subprocess.Popen(); a running checker process used
 
788
                                    to see if the client lives.
 
789
                                    'None' if no process is running.
863
790
    checker_callback_tag: a GLib event source tag, or None
864
791
    checker_command: string; External command which is run to check
865
792
                     if client lives.  %() expansions are done at
873
800
    disable_initiator_tag: a GLib event source tag, or None
874
801
    enabled:    bool()
875
802
    fingerprint: string (40 or 32 hexadecimal digits); used to
876
 
                 uniquely identify an OpenPGP client
877
 
    key_id: string (64 hexadecimal digits); used to uniquely identify
878
 
            a client using raw public keys
 
803
                 uniquely identify the client
879
804
    host:       string; available for use by the checker command
880
805
    interval:   datetime.timedelta(); How often to start a new checker
881
806
    last_approval_request: datetime.datetime(); (UTC) or None
899
824
    """
900
825
 
901
826
    runtime_expansions = ("approval_delay", "approval_duration",
902
 
                          "created", "enabled", "expires", "key_id",
 
827
                          "created", "enabled", "expires",
903
828
                          "fingerprint", "host", "interval",
904
829
                          "last_approval_request", "last_checked_ok",
905
830
                          "last_enabled", "name", "timeout")
935
860
            client["enabled"] = config.getboolean(client_name,
936
861
                                                  "enabled")
937
862
 
938
 
            # Uppercase and remove spaces from key_id and fingerprint
939
 
            # for later comparison purposes with return value from the
940
 
            # key_id() and fingerprint() functions
941
 
            client["key_id"] = (section.get("key_id", "").upper()
942
 
                                .replace(" ", ""))
 
863
            # Uppercase and remove spaces from fingerprint for later
 
864
            # comparison purposes with return value from the
 
865
            # fingerprint() function
943
866
            client["fingerprint"] = (section["fingerprint"].upper()
944
867
                                     .replace(" ", ""))
945
868
            if "secret" in section:
989
912
            self.expires = None
990
913
 
991
914
        logger.debug("Creating client %r", self.name)
992
 
        logger.debug("  Key ID: %s", self.key_id)
993
915
        logger.debug("  Fingerprint: %s", self.fingerprint)
994
916
        self.created = settings.get("created",
995
917
                                    datetime.datetime.utcnow())
1059
981
        if self.checker_initiator_tag is not None:
1060
982
            GLib.source_remove(self.checker_initiator_tag)
1061
983
        self.checker_initiator_tag = GLib.timeout_add(
1062
 
            random.randrange(int(self.interval.total_seconds() * 1000
1063
 
                                 + 1)),
 
984
            int(self.interval.total_seconds() * 1000),
1064
985
            self.start_checker)
1065
986
        # Schedule a disable() when 'timeout' has passed
1066
987
        if self.disable_initiator_tag is not None:
1073
994
    def checker_callback(self, source, condition, connection,
1074
995
                         command):
1075
996
        """The checker has completed, so take appropriate actions."""
 
997
        self.checker_callback_tag = None
 
998
        self.checker = None
1076
999
        # Read return code from connection (see call_pipe)
1077
1000
        returncode = connection.recv()
1078
1001
        connection.close()
1079
 
        if self.checker is not None:
1080
 
            self.checker.join()
1081
 
        self.checker_callback_tag = None
1082
 
        self.checker = None
1083
1002
 
1084
1003
        if returncode >= 0:
1085
1004
            self.last_checker_status = returncode
1141
1060
        if self.checker is None:
1142
1061
            # Escape attributes for the shell
1143
1062
            escaped_attrs = {
1144
 
                attr: shlex.quote(str(getattr(self, attr)))
 
1063
                attr: re.escape(str(getattr(self, attr)))
1145
1064
                for attr in self.runtime_expansions}
1146
1065
            try:
1147
1066
                command = self.checker_command % escaped_attrs
1174
1093
                kwargs=popen_args)
1175
1094
            self.checker.start()
1176
1095
            self.checker_callback_tag = GLib.io_add_watch(
1177
 
                GLib.IOChannel.unix_new(pipe[0].fileno()),
1178
 
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
1096
                pipe[0].fileno(), GLib.IO_IN,
1179
1097
                self.checker_callback, pipe[0], command)
1180
1098
        # Re-run this periodically if run by GLib.timeout_add
1181
1099
        return True
1436
1354
                raise ValueError("Byte arrays not supported for non-"
1437
1355
                                 "'ay' signature {!r}"
1438
1356
                                 .format(prop._dbus_signature))
1439
 
            value = dbus.ByteArray(bytes(value))
 
1357
            value = dbus.ByteArray(b''.join(chr(byte)
 
1358
                                            for byte in value))
1440
1359
        prop(value)
1441
1360
 
1442
1361
    @dbus.service.method(dbus.PROPERTIES_IFACE,
2080
1999
    def Name_dbus_property(self):
2081
2000
        return dbus.String(self.name)
2082
2001
 
2083
 
    # KeyID - property
2084
 
    @dbus_annotations(
2085
 
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2086
 
    @dbus_service_property(_interface, signature="s", access="read")
2087
 
    def KeyID_dbus_property(self):
2088
 
        return dbus.String(self.key_id)
2089
 
 
2090
2002
    # Fingerprint - property
2091
2003
    @dbus_annotations(
2092
2004
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2247
2159
    del _interface
2248
2160
 
2249
2161
 
2250
 
class ProxyClient:
2251
 
    def __init__(self, child_pipe, key_id, fpr, address):
 
2162
class ProxyClient(object):
 
2163
    def __init__(self, child_pipe, fpr, address):
2252
2164
        self._pipe = child_pipe
2253
 
        self._pipe.send(('init', key_id, fpr, address))
 
2165
        self._pipe.send(('init', fpr, address))
2254
2166
        if not self._pipe.recv():
2255
 
            raise KeyError(key_id or fpr)
 
2167
            raise KeyError(fpr)
2256
2168
 
2257
2169
    def __getattribute__(self, name):
2258
2170
        if name == '_pipe':
2325
2237
 
2326
2238
            approval_required = False
2327
2239
            try:
2328
 
                if gnutls.has_rawpk:
2329
 
                    fpr = b""
2330
 
                    try:
2331
 
                        key_id = self.key_id(
2332
 
                            self.peer_certificate(session))
2333
 
                    except (TypeError, gnutls.Error) as error:
2334
 
                        logger.warning("Bad certificate: %s", error)
2335
 
                        return
2336
 
                    logger.debug("Key ID: %s", key_id)
2337
 
 
2338
 
                else:
2339
 
                    key_id = b""
2340
 
                    try:
2341
 
                        fpr = self.fingerprint(
2342
 
                            self.peer_certificate(session))
2343
 
                    except (TypeError, gnutls.Error) as error:
2344
 
                        logger.warning("Bad certificate: %s", error)
2345
 
                        return
2346
 
                    logger.debug("Fingerprint: %s", fpr)
2347
 
 
2348
 
                try:
2349
 
                    client = ProxyClient(child_pipe, key_id, fpr,
 
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,
2350
2250
                                         self.client_address)
2351
2251
                except KeyError:
2352
2252
                    return
2429
2329
 
2430
2330
    @staticmethod
2431
2331
    def peer_certificate(session):
2432
 
        "Return the peer's certificate as a bytestring"
2433
 
        try:
2434
 
            cert_type = gnutls.certificate_type_get2(session._c_object,
2435
 
                                                     gnutls.CTYPE_PEERS)
2436
 
        except AttributeError:
2437
 
            cert_type = gnutls.certificate_type_get(session._c_object)
2438
 
        if gnutls.has_rawpk:
2439
 
            valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
2440
 
        else:
2441
 
            valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
2442
 
        # If not a valid certificate type...
2443
 
        if cert_type not in valid_cert_types:
2444
 
            logger.info("Cert type %r not in %r", cert_type,
2445
 
                        valid_cert_types)
 
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):
2446
2336
            # ...return invalid data
2447
2337
            return b""
2448
2338
        list_size = ctypes.c_uint(1)
2456
2346
        return ctypes.string_at(cert.data, cert.size)
2457
2347
 
2458
2348
    @staticmethod
2459
 
    def key_id(certificate):
2460
 
        "Convert a certificate bytestring to a hexdigit key ID"
2461
 
        # New GnuTLS "datum" with the public key
2462
 
        datum = gnutls.datum_t(
2463
 
            ctypes.cast(ctypes.c_char_p(certificate),
2464
 
                        ctypes.POINTER(ctypes.c_ubyte)),
2465
 
            ctypes.c_uint(len(certificate)))
2466
 
        # XXX all these need to be created in the gnutls "module"
2467
 
        # New empty GnuTLS certificate
2468
 
        pubkey = gnutls.pubkey_t()
2469
 
        gnutls.pubkey_init(ctypes.byref(pubkey))
2470
 
        # Import the raw public key into the certificate
2471
 
        gnutls.pubkey_import(pubkey,
2472
 
                             ctypes.byref(datum),
2473
 
                             gnutls.X509_FMT_DER)
2474
 
        # New buffer for the key ID
2475
 
        buf = ctypes.create_string_buffer(32)
2476
 
        buf_len = ctypes.c_size_t(len(buf))
2477
 
        # Get the key ID from the raw public key into the buffer
2478
 
        gnutls.pubkey_get_key_id(
2479
 
            pubkey,
2480
 
            gnutls.KEYID_USE_SHA256,
2481
 
            ctypes.cast(ctypes.byref(buf),
2482
 
                        ctypes.POINTER(ctypes.c_ubyte)),
2483
 
            ctypes.byref(buf_len))
2484
 
        # Deinit the certificate
2485
 
        gnutls.pubkey_deinit(pubkey)
2486
 
 
2487
 
        # Convert the buffer to a Python bytestring
2488
 
        key_id = ctypes.string_at(buf, buf_len.value)
2489
 
        # Convert the bytestring to hexadecimal notation
2490
 
        hex_key_id = binascii.hexlify(key_id).upper()
2491
 
        return hex_key_id
2492
 
 
2493
 
    @staticmethod
2494
2349
    def fingerprint(openpgp):
2495
2350
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
2496
2351
        # New GnuTLS "datum" with the OpenPGP public key
2510
2365
                                       ctypes.byref(crtverify))
2511
2366
        if crtverify.value != 0:
2512
2367
            gnutls.openpgp_crt_deinit(crt)
2513
 
            raise gnutls.CertificateSecurityError(code
2514
 
                                                  =crtverify.value)
 
2368
            raise gnutls.CertificateSecurityError("Verify failed")
2515
2369
        # New buffer for the fingerprint
2516
2370
        buf = ctypes.create_string_buffer(20)
2517
2371
        buf_len = ctypes.c_size_t()
2527
2381
        return hex_fpr
2528
2382
 
2529
2383
 
2530
 
class MultiprocessingMixIn:
 
2384
class MultiprocessingMixIn(object):
2531
2385
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
2532
2386
 
2533
2387
    def sub_process_main(self, request, address):
2545
2399
        return proc
2546
2400
 
2547
2401
 
2548
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
 
2402
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
2549
2403
    """ adds a pipe to the MixIn """
2550
2404
 
2551
2405
    def process_request(self, request, client_address):
2566
2420
 
2567
2421
 
2568
2422
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2569
 
                     socketserver.TCPServer):
 
2423
                     socketserver.TCPServer, object):
2570
2424
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
2571
2425
 
2572
2426
    Attributes:
2645
2499
                    raise
2646
2500
        # Only bind(2) the socket if we really need to.
2647
2501
        if self.server_address[0] or self.server_address[1]:
2648
 
            if self.server_address[1]:
2649
 
                self.allow_reuse_address = True
2650
2502
            if not self.server_address[0]:
2651
2503
                if self.address_family == socket.AF_INET6:
2652
2504
                    any_address = "::"  # in6addr_any
2705
2557
    def add_pipe(self, parent_pipe, proc):
2706
2558
        # Call "handle_ipc" for both data and EOF events
2707
2559
        GLib.io_add_watch(
2708
 
            GLib.IOChannel.unix_new(parent_pipe.fileno()),
2709
 
            GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
 
2560
            parent_pipe.fileno(),
 
2561
            GLib.IO_IN | GLib.IO_HUP,
2710
2562
            functools.partial(self.handle_ipc,
2711
2563
                              parent_pipe=parent_pipe,
2712
2564
                              proc=proc))
2726
2578
        command = request[0]
2727
2579
 
2728
2580
        if command == 'init':
2729
 
            key_id = request[1].decode("ascii")
2730
 
            fpr = request[2].decode("ascii")
2731
 
            address = request[3]
 
2581
            fpr = request[1].decode("ascii")
 
2582
            address = request[2]
2732
2583
 
2733
2584
            for c in self.clients.values():
2734
 
                if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"
2735
 
                              "27AE41E4649B934CA495991B7852B855"):
2736
 
                    continue
2737
 
                if key_id and c.key_id == key_id:
2738
 
                    client = c
2739
 
                    break
2740
 
                if fpr and c.fingerprint == fpr:
 
2585
                if c.fingerprint == fpr:
2741
2586
                    client = c
2742
2587
                    break
2743
2588
            else:
2744
 
                logger.info("Client not found for key ID: %s, address"
2745
 
                            ": %s", key_id or fpr, address)
 
2589
                logger.info("Client not found for fingerprint: %s, ad"
 
2590
                            "dress: %s", fpr, address)
2746
2591
                if self.use_dbus:
2747
2592
                    # Emit D-Bus signal
2748
 
                    mandos_dbus_service.ClientNotFound(key_id or fpr,
 
2593
                    mandos_dbus_service.ClientNotFound(fpr,
2749
2594
                                                       address[0])
2750
2595
                parent_pipe.send(False)
2751
2596
                return False
2752
2597
 
2753
2598
            GLib.io_add_watch(
2754
 
                GLib.IOChannel.unix_new(parent_pipe.fileno()),
2755
 
                GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
 
2599
                parent_pipe.fileno(),
 
2600
                GLib.IO_IN | GLib.IO_HUP,
2756
2601
                functools.partial(self.handle_ipc,
2757
2602
                                  parent_pipe=parent_pipe,
2758
2603
                                  proc=proc,
2773
2618
        if command == 'getattr':
2774
2619
            attrname = request[1]
2775
2620
            if isinstance(client_object.__getattribute__(attrname),
2776
 
                          collections.abc.Callable):
 
2621
                          collections.Callable):
2777
2622
                parent_pipe.send(('function', ))
2778
2623
            else:
2779
2624
                parent_pipe.send((
2790
2635
def rfc3339_duration_to_delta(duration):
2791
2636
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2792
2637
 
2793
 
    >>> timedelta = datetime.timedelta
2794
 
    >>> rfc3339_duration_to_delta("P7D") == timedelta(7)
2795
 
    True
2796
 
    >>> rfc3339_duration_to_delta("PT60S") == timedelta(0, 60)
2797
 
    True
2798
 
    >>> rfc3339_duration_to_delta("PT60M") == timedelta(0, 3600)
2799
 
    True
2800
 
    >>> rfc3339_duration_to_delta("PT24H") == timedelta(1)
2801
 
    True
2802
 
    >>> rfc3339_duration_to_delta("P1W") == timedelta(7)
2803
 
    True
2804
 
    >>> rfc3339_duration_to_delta("PT5M30S") == timedelta(0, 330)
2805
 
    True
2806
 
    >>> rfc3339_duration_to_delta("P1DT3M20S") == timedelta(1, 200)
2807
 
    True
2808
 
    >>> del timedelta
 
2638
    >>> rfc3339_duration_to_delta("P7D")
 
2639
    datetime.timedelta(7)
 
2640
    >>> rfc3339_duration_to_delta("PT60S")
 
2641
    datetime.timedelta(0, 60)
 
2642
    >>> rfc3339_duration_to_delta("PT60M")
 
2643
    datetime.timedelta(0, 3600)
 
2644
    >>> rfc3339_duration_to_delta("PT24H")
 
2645
    datetime.timedelta(1)
 
2646
    >>> rfc3339_duration_to_delta("P1W")
 
2647
    datetime.timedelta(7)
 
2648
    >>> rfc3339_duration_to_delta("PT5M30S")
 
2649
    datetime.timedelta(0, 330)
 
2650
    >>> rfc3339_duration_to_delta("P1DT3M20S")
 
2651
    datetime.timedelta(1, 200)
2809
2652
    """
2810
2653
 
2811
2654
    # Parsing an RFC 3339 duration with regular expressions is not
2891
2734
def string_to_delta(interval):
2892
2735
    """Parse a string and return a datetime.timedelta
2893
2736
 
2894
 
    >>> string_to_delta('7d') == datetime.timedelta(7)
2895
 
    True
2896
 
    >>> string_to_delta('60s') == datetime.timedelta(0, 60)
2897
 
    True
2898
 
    >>> string_to_delta('60m') == datetime.timedelta(0, 3600)
2899
 
    True
2900
 
    >>> string_to_delta('24h') == datetime.timedelta(1)
2901
 
    True
2902
 
    >>> string_to_delta('1w') == datetime.timedelta(7)
2903
 
    True
2904
 
    >>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
2905
 
    True
 
2737
    >>> string_to_delta('7d')
 
2738
    datetime.timedelta(7)
 
2739
    >>> string_to_delta('60s')
 
2740
    datetime.timedelta(0, 60)
 
2741
    >>> string_to_delta('60m')
 
2742
    datetime.timedelta(0, 3600)
 
2743
    >>> string_to_delta('24h')
 
2744
    datetime.timedelta(1)
 
2745
    >>> string_to_delta('1w')
 
2746
    datetime.timedelta(7)
 
2747
    >>> string_to_delta('5m 30s')
 
2748
    datetime.timedelta(0, 330)
2906
2749
    """
2907
2750
 
2908
2751
    try:
3010
2853
 
3011
2854
    options = parser.parse_args()
3012
2855
 
 
2856
    if options.check:
 
2857
        import doctest
 
2858
        fail_count, test_count = doctest.testmod()
 
2859
        sys.exit(os.EX_OK if fail_count == 0 else 1)
 
2860
 
3013
2861
    # Default values for config file for server-global settings
3014
 
    if gnutls.has_rawpk:
3015
 
        priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
3016
 
                    ":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
3017
 
    else:
3018
 
        priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
3019
 
                    ":+SIGN-DSA-SHA256")
3020
2862
    server_defaults = {"interface": "",
3021
2863
                       "address": "",
3022
2864
                       "port": "",
3023
2865
                       "debug": "False",
3024
 
                       "priority": priority,
 
2866
                       "priority":
 
2867
                       "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
2868
                       ":+SIGN-DSA-SHA256",
3025
2869
                       "servicename": "Mandos",
3026
2870
                       "use_dbus": "True",
3027
2871
                       "use_ipv6": "True",
3032
2876
                       "foreground": "False",
3033
2877
                       "zeroconf": "True",
3034
2878
                       }
3035
 
    del priority
3036
2879
 
3037
2880
    # Parse config file for server-global settings
3038
 
    server_config = configparser.ConfigParser(server_defaults)
 
2881
    server_config = configparser.SafeConfigParser(server_defaults)
3039
2882
    del server_defaults
3040
2883
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
3041
 
    # Convert the ConfigParser object to a dict
 
2884
    # Convert the SafeConfigParser object to a dict
3042
2885
    server_settings = server_config.defaults()
3043
2886
    # Use the appropriate methods on the non-string config options
3044
2887
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
3116
2959
                                  server_settings["servicename"])))
3117
2960
 
3118
2961
    # Parse config file with clients
3119
 
    client_config = configparser.ConfigParser(Client.client_defaults)
 
2962
    client_config = configparser.SafeConfigParser(Client
 
2963
                                                  .client_defaults)
3120
2964
    client_config.read(os.path.join(server_settings["configdir"],
3121
2965
                                    "clients.conf"))
3122
2966
 
3193
3037
        # Close all input and output, do double fork, etc.
3194
3038
        daemon()
3195
3039
 
3196
 
    if gi.version_info < (3, 10, 2):
3197
 
        # multiprocessing will use threads, so before we use GLib we
3198
 
        # need to inform GLib that threads will be used.
3199
 
        GLib.threads_init()
 
3040
    # multiprocessing will use threads, so before we use GLib we need
 
3041
    # to inform GLib that threads will be used.
 
3042
    GLib.threads_init()
3200
3043
 
3201
3044
    global main_loop
3202
3045
    # From the Avahi example code
3278
3121
                             if isinstance(s, bytes)
3279
3122
                             else s) for s in
3280
3123
                            value["client_structure"]]
3281
 
                        # .name, .host, and .checker_command
3282
 
                        for k in ("name", "host", "checker_command"):
 
3124
                        # .name & .host
 
3125
                        for k in ("name", "host"):
3283
3126
                            if isinstance(value[k], bytes):
3284
3127
                                value[k] = value[k].decode("utf-8")
3285
 
                        if "key_id" not in value:
3286
 
                            value["key_id"] = ""
3287
 
                        elif "fingerprint" not in value:
3288
 
                            value["fingerprint"] = ""
3289
3128
                    #  old_client_settings
3290
3129
                    # .keys()
3291
3130
                    old_client_settings = {
3295
3134
                        for key, value in
3296
3135
                        bytes_old_client_settings.items()}
3297
3136
                    del bytes_old_client_settings
3298
 
                    # .host and .checker_command
 
3137
                    # .host
3299
3138
                    for value in old_client_settings.values():
3300
 
                        for attribute in ("host", "checker_command"):
3301
 
                            if isinstance(value[attribute], bytes):
3302
 
                                value[attribute] = (value[attribute]
3303
 
                                                    .decode("utf-8"))
 
3139
                        if isinstance(value["host"], bytes):
 
3140
                            value["host"] = (value["host"]
 
3141
                                             .decode("utf-8"))
3304
3142
            os.remove(stored_state_path)
3305
3143
        except IOError as e:
3306
3144
            if e.errno == errno.ENOENT:
3429
3267
                pass
3430
3268
 
3431
3269
            @dbus.service.signal(_interface, signature="ss")
3432
 
            def ClientNotFound(self, key_id, address):
 
3270
            def ClientNotFound(self, fingerprint, address):
3433
3271
                "D-Bus signal"
3434
3272
                pass
3435
3273
 
3631
3469
                sys.exit(1)
3632
3470
            # End of Avahi example code
3633
3471
 
3634
 
        GLib.io_add_watch(
3635
 
            GLib.IOChannel.unix_new(tcp_server.fileno()),
3636
 
            GLib.PRIORITY_DEFAULT, GLib.IO_IN,
3637
 
            lambda *args, **kwargs: (tcp_server.handle_request
3638
 
                                     (*args[2:], **kwargs) or True))
 
3472
        GLib.io_add_watch(tcp_server.fileno(), GLib.IO_IN,
 
3473
                          lambda *args, **kwargs:
 
3474
                          (tcp_server.handle_request
 
3475
                           (*args[2:], **kwargs) or True))
3639
3476
 
3640
3477
        logger.debug("Starting main loop")
3641
3478
        main_loop.run()
3651
3488
    # Must run before the D-Bus bus name gets deregistered
3652
3489
    cleanup()
3653
3490
 
3654
 
 
3655
 
def should_only_run_tests():
3656
 
    parser = argparse.ArgumentParser(add_help=False)
3657
 
    parser.add_argument("--check", action='store_true')
3658
 
    args, unknown_args = parser.parse_known_args()
3659
 
    run_tests = args.check
3660
 
    if run_tests:
3661
 
        # Remove --check argument from sys.argv
3662
 
        sys.argv[1:] = unknown_args
3663
 
    return run_tests
3664
 
 
3665
 
# Add all tests from doctest strings
3666
 
def load_tests(loader, tests, none):
3667
 
    import doctest
3668
 
    tests.addTests(doctest.DocTestSuite())
3669
 
    return tests
3670
3491
 
3671
3492
if __name__ == '__main__':
3672
 
    try:
3673
 
        if should_only_run_tests():
3674
 
            # Call using ./mandos --check [--verbose]
3675
 
            unittest.main()
3676
 
        else:
3677
 
            main()
3678
 
    finally:
3679
 
        logging.shutdown()
 
3493
    main()