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  • Committer: teddy at recompile
  • Date: 2020-07-04 08:59:37 UTC
  • Revision ID: teddy@recompile.se-20200704085937-r495zb32nfng9lnt
In initramfs-tools boots, only use setsid when available

* initramfs-tools-script: If available, use setsid to start
  mandos-to-cryptroot-unlock.

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Lines of Context:
mandos
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 © 2008-2019 Teddy Hogeborn
 
15
# Copyright © 2008-2019 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 = "1.7.17"
 
146
version = "1.8.11"
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:
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:
200
229
                          '--force-mdc',
201
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):
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:
504
532
 
505
533
 
506
534
# 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."""
 
535
class gnutls:
 
536
    """This isn't so much a class as it is a module-like namespace."""
510
537
 
511
538
    library = ctypes.util.find_library("gnutls")
512
539
    if library is None:
513
540
        library = ctypes.util.find_library("gnutls-deb0")
514
541
    _library = ctypes.cdll.LoadLibrary(library)
515
542
    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
543
 
525
544
    # Unless otherwise indicated, the constants and types below are
526
545
    # all from the gnutls/gnutls.h C header file.
530
549
    E_INTERRUPTED = -52
531
550
    E_AGAIN = -28
532
551
    CRT_OPENPGP = 2
 
552
    CRT_RAWPK = 3
533
553
    CLIENT = 2
534
554
    SHUT_RDWR = 0
535
555
    CRD_CERTIFICATE = 1
536
556
    E_NO_CERTIFICATE_FOUND = -49
 
557
    X509_FMT_DER = 0
 
558
    NO_TICKETS = 1<<10
 
559
    ENABLE_RAWPK = 1<<18
 
560
    CTYPE_PEERS = 3
 
561
    KEYID_USE_SHA256 = 1        # gnutls/x509.h
537
562
    OPENPGP_FMT_RAW = 0         # gnutls/openpgp.h
538
563
 
539
564
    # Types
562
587
 
563
588
    # Exceptions
564
589
    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
590
        def __init__(self, message=None, code=None, args=()):
570
591
            # Default usage is by a message string, but if a return
571
592
            # code is passed, convert it to a string with
572
593
            # gnutls.strerror()
573
594
            self.code = code
574
595
            if message is None and code is not None:
575
 
                message = GnuTLS.strerror(code)
576
 
            return super(GnuTLS.Error, self).__init__(
 
596
                message = gnutls.strerror(code)
 
597
            return super(gnutls.Error, self).__init__(
577
598
                message, *args)
578
599
 
579
600
    class CertificateSecurityError(Error):
580
601
        pass
581
602
 
582
603
    # Classes
583
 
    class Credentials(object):
 
604
    class Credentials:
584
605
        def __init__(self):
585
606
            self._c_object = gnutls.certificate_credentials_t()
586
607
            gnutls.certificate_allocate_credentials(
590
611
        def __del__(self):
591
612
            gnutls.certificate_free_credentials(self._c_object)
592
613
 
593
 
    class ClientSession(object):
 
614
    class ClientSession:
594
615
        def __init__(self, socket, credentials=None):
595
616
            self._c_object = gnutls.session_t()
596
 
            gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)
 
617
            gnutls_flags = gnutls.CLIENT
 
618
            if gnutls.check_version(b"3.5.6"):
 
619
                gnutls_flags |= gnutls.NO_TICKETS
 
620
            if gnutls.has_rawpk:
 
621
                gnutls_flags |= gnutls.ENABLE_RAWPK
 
622
            gnutls.init(ctypes.byref(self._c_object), gnutls_flags)
 
623
            del gnutls_flags
597
624
            gnutls.set_default_priority(self._c_object)
598
625
            gnutls.transport_set_ptr(self._c_object, socket.fileno())
599
626
            gnutls.handshake_set_private_extensions(self._c_object,
731
758
    check_version.argtypes = [ctypes.c_char_p]
732
759
    check_version.restype = ctypes.c_char_p
733
760
 
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
 
761
    _need_version = b"3.3.0"
 
762
    if check_version(_need_version) is None:
 
763
        raise self.Error("Needs GnuTLS {} or later"
 
764
                         .format(_need_version))
 
765
 
 
766
    _tls_rawpk_version = b"3.6.6"
 
767
    has_rawpk = bool(check_version(_tls_rawpk_version))
 
768
 
 
769
    if has_rawpk:
 
770
        # Types
 
771
        class pubkey_st(ctypes.Structure):
 
772
            _fields = []
 
773
        pubkey_t = ctypes.POINTER(pubkey_st)
 
774
 
 
775
        x509_crt_fmt_t = ctypes.c_int
 
776
 
 
777
        # All the function declarations below are from gnutls/abstract.h
 
778
        pubkey_init = _library.gnutls_pubkey_init
 
779
        pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]
 
780
        pubkey_init.restype = _error_code
 
781
 
 
782
        pubkey_import = _library.gnutls_pubkey_import
 
783
        pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),
 
784
                                  x509_crt_fmt_t]
 
785
        pubkey_import.restype = _error_code
 
786
 
 
787
        pubkey_get_key_id = _library.gnutls_pubkey_get_key_id
 
788
        pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,
 
789
                                      ctypes.POINTER(ctypes.c_ubyte),
 
790
                                      ctypes.POINTER(ctypes.c_size_t)]
 
791
        pubkey_get_key_id.restype = _error_code
 
792
 
 
793
        pubkey_deinit = _library.gnutls_pubkey_deinit
 
794
        pubkey_deinit.argtypes = [pubkey_t]
 
795
        pubkey_deinit.restype = None
 
796
    else:
 
797
        # All the function declarations below are from gnutls/openpgp.h
 
798
 
 
799
        openpgp_crt_init = _library.gnutls_openpgp_crt_init
 
800
        openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]
 
801
        openpgp_crt_init.restype = _error_code
 
802
 
 
803
        openpgp_crt_import = _library.gnutls_openpgp_crt_import
 
804
        openpgp_crt_import.argtypes = [openpgp_crt_t,
 
805
                                       ctypes.POINTER(datum_t),
 
806
                                       openpgp_crt_fmt_t]
 
807
        openpgp_crt_import.restype = _error_code
 
808
 
 
809
        openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self
 
810
        openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,
 
811
                                            ctypes.POINTER(ctypes.c_uint)]
 
812
        openpgp_crt_verify_self.restype = _error_code
 
813
 
 
814
        openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit
 
815
        openpgp_crt_deinit.argtypes = [openpgp_crt_t]
 
816
        openpgp_crt_deinit.restype = None
 
817
 
 
818
        openpgp_crt_get_fingerprint = (
 
819
            _library.gnutls_openpgp_crt_get_fingerprint)
 
820
        openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,
 
821
                                                ctypes.c_void_p,
 
822
                                                ctypes.POINTER(
 
823
                                                    ctypes.c_size_t)]
 
824
        openpgp_crt_get_fingerprint.restype = _error_code
 
825
 
 
826
    if check_version(b"3.6.4"):
 
827
        certificate_type_get2 = _library.gnutls_certificate_type_get2
 
828
        certificate_type_get2.argtypes = [session_t, ctypes.c_int]
 
829
        certificate_type_get2.restype = _error_code
762
830
 
763
831
    # Remove non-public functions
764
832
    del _error_code, _retry_on_error
765
 
# Create the global "gnutls" object, simulating a module
766
 
gnutls = GnuTLS()
767
833
 
768
834
 
769
835
def call_pipe(connection,       # : multiprocessing.Connection
777
843
    connection.close()
778
844
 
779
845
 
780
 
class Client(object):
 
846
class Client:
781
847
    """A representation of a client host served by this server.
782
848
 
783
849
    Attributes:
784
850
    approved:   bool(); 'None' if not yet approved/disapproved
785
851
    approval_delay: datetime.timedelta(); Time to wait for approval
786
852
    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.
 
853
    checker: multiprocessing.Process(); a running checker process used
 
854
             to see if the client lives. 'None' if no process is
 
855
             running.
790
856
    checker_callback_tag: a GLib event source tag, or None
791
857
    checker_command: string; External command which is run to check
792
858
                     if client lives.  %() expansions are done at
800
866
    disable_initiator_tag: a GLib event source tag, or None
801
867
    enabled:    bool()
802
868
    fingerprint: string (40 or 32 hexadecimal digits); used to
803
 
                 uniquely identify the client
 
869
                 uniquely identify an OpenPGP client
 
870
    key_id: string (64 hexadecimal digits); used to uniquely identify
 
871
            a client using raw public keys
804
872
    host:       string; available for use by the checker command
805
873
    interval:   datetime.timedelta(); How often to start a new checker
806
874
    last_approval_request: datetime.datetime(); (UTC) or None
824
892
    """
825
893
 
826
894
    runtime_expansions = ("approval_delay", "approval_duration",
827
 
                          "created", "enabled", "expires",
 
895
                          "created", "enabled", "expires", "key_id",
828
896
                          "fingerprint", "host", "interval",
829
897
                          "last_approval_request", "last_checked_ok",
830
898
                          "last_enabled", "name", "timeout")
860
928
            client["enabled"] = config.getboolean(client_name,
861
929
                                                  "enabled")
862
930
 
863
 
            # Uppercase and remove spaces from fingerprint for later
864
 
            # comparison purposes with return value from the
865
 
            # fingerprint() function
 
931
            # Uppercase and remove spaces from key_id and fingerprint
 
932
            # for later comparison purposes with return value from the
 
933
            # key_id() and fingerprint() functions
 
934
            client["key_id"] = (section.get("key_id", "").upper()
 
935
                                .replace(" ", ""))
866
936
            client["fingerprint"] = (section["fingerprint"].upper()
867
937
                                     .replace(" ", ""))
868
938
            if "secret" in section:
912
982
            self.expires = None
913
983
 
914
984
        logger.debug("Creating client %r", self.name)
 
985
        logger.debug("  Key ID: %s", self.key_id)
915
986
        logger.debug("  Fingerprint: %s", self.fingerprint)
916
987
        self.created = settings.get("created",
917
988
                                    datetime.datetime.utcnow())
981
1052
        if self.checker_initiator_tag is not None:
982
1053
            GLib.source_remove(self.checker_initiator_tag)
983
1054
        self.checker_initiator_tag = GLib.timeout_add(
984
 
            int(self.interval.total_seconds() * 1000),
 
1055
            random.randrange(int(self.interval.total_seconds() * 1000
 
1056
                                 + 1)),
985
1057
            self.start_checker)
986
1058
        # Schedule a disable() when 'timeout' has passed
987
1059
        if self.disable_initiator_tag is not None:
994
1066
    def checker_callback(self, source, condition, connection,
995
1067
                         command):
996
1068
        """The checker has completed, so take appropriate actions."""
997
 
        self.checker_callback_tag = None
998
 
        self.checker = None
999
1069
        # Read return code from connection (see call_pipe)
1000
1070
        returncode = connection.recv()
1001
1071
        connection.close()
 
1072
        if self.checker is not None:
 
1073
            self.checker.join()
 
1074
        self.checker_callback_tag = None
 
1075
        self.checker = None
1002
1076
 
1003
1077
        if returncode >= 0:
1004
1078
            self.last_checker_status = returncode
1060
1134
        if self.checker is None:
1061
1135
            # Escape attributes for the shell
1062
1136
            escaped_attrs = {
1063
 
                attr: re.escape(str(getattr(self, attr)))
 
1137
                attr: shlex.quote(str(getattr(self, attr)))
1064
1138
                for attr in self.runtime_expansions}
1065
1139
            try:
1066
1140
                command = self.checker_command % escaped_attrs
1093
1167
                kwargs=popen_args)
1094
1168
            self.checker.start()
1095
1169
            self.checker_callback_tag = GLib.io_add_watch(
1096
 
                pipe[0].fileno(), GLib.IO_IN,
 
1170
                GLib.IOChannel.unix_new(pipe[0].fileno()),
 
1171
                GLib.PRIORITY_DEFAULT, GLib.IO_IN,
1097
1172
                self.checker_callback, pipe[0], command)
1098
1173
        # Re-run this periodically if run by GLib.timeout_add
1099
1174
        return True
1354
1429
                raise ValueError("Byte arrays not supported for non-"
1355
1430
                                 "'ay' signature {!r}"
1356
1431
                                 .format(prop._dbus_signature))
1357
 
            value = dbus.ByteArray(b''.join(chr(byte)
1358
 
                                            for byte in value))
 
1432
            value = dbus.ByteArray(bytes(value))
1359
1433
        prop(value)
1360
1434
 
1361
1435
    @dbus.service.method(dbus.PROPERTIES_IFACE,
1999
2073
    def Name_dbus_property(self):
2000
2074
        return dbus.String(self.name)
2001
2075
 
 
2076
    # KeyID - property
 
2077
    @dbus_annotations(
 
2078
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
 
2079
    @dbus_service_property(_interface, signature="s", access="read")
 
2080
    def KeyID_dbus_property(self):
 
2081
        return dbus.String(self.key_id)
 
2082
 
2002
2083
    # Fingerprint - property
2003
2084
    @dbus_annotations(
2004
2085
        {"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})
2159
2240
    del _interface
2160
2241
 
2161
2242
 
2162
 
class ProxyClient(object):
2163
 
    def __init__(self, child_pipe, fpr, address):
 
2243
class ProxyClient:
 
2244
    def __init__(self, child_pipe, key_id, fpr, address):
2164
2245
        self._pipe = child_pipe
2165
 
        self._pipe.send(('init', fpr, address))
 
2246
        self._pipe.send(('init', key_id, fpr, address))
2166
2247
        if not self._pipe.recv():
2167
 
            raise KeyError(fpr)
 
2248
            raise KeyError(key_id or fpr)
2168
2249
 
2169
2250
    def __getattribute__(self, name):
2170
2251
        if name == '_pipe':
2237
2318
 
2238
2319
            approval_required = False
2239
2320
            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,
 
2321
                if gnutls.has_rawpk:
 
2322
                    fpr = b""
 
2323
                    try:
 
2324
                        key_id = self.key_id(
 
2325
                            self.peer_certificate(session))
 
2326
                    except (TypeError, gnutls.Error) as error:
 
2327
                        logger.warning("Bad certificate: %s", error)
 
2328
                        return
 
2329
                    logger.debug("Key ID: %s", key_id)
 
2330
 
 
2331
                else:
 
2332
                    key_id = b""
 
2333
                    try:
 
2334
                        fpr = self.fingerprint(
 
2335
                            self.peer_certificate(session))
 
2336
                    except (TypeError, gnutls.Error) as error:
 
2337
                        logger.warning("Bad certificate: %s", error)
 
2338
                        return
 
2339
                    logger.debug("Fingerprint: %s", fpr)
 
2340
 
 
2341
                try:
 
2342
                    client = ProxyClient(child_pipe, key_id, fpr,
2250
2343
                                         self.client_address)
2251
2344
                except KeyError:
2252
2345
                    return
2329
2422
 
2330
2423
    @staticmethod
2331
2424
    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):
 
2425
        "Return the peer's certificate as a bytestring"
 
2426
        try:
 
2427
            cert_type = gnutls.certificate_type_get2(session._c_object,
 
2428
                                                     gnutls.CTYPE_PEERS)
 
2429
        except AttributeError:
 
2430
            cert_type = gnutls.certificate_type_get(session._c_object)
 
2431
        if gnutls.has_rawpk:
 
2432
            valid_cert_types = frozenset((gnutls.CRT_RAWPK,))
 
2433
        else:
 
2434
            valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))
 
2435
        # If not a valid certificate type...
 
2436
        if cert_type not in valid_cert_types:
 
2437
            logger.info("Cert type %r not in %r", cert_type,
 
2438
                        valid_cert_types)
2336
2439
            # ...return invalid data
2337
2440
            return b""
2338
2441
        list_size = ctypes.c_uint(1)
2346
2449
        return ctypes.string_at(cert.data, cert.size)
2347
2450
 
2348
2451
    @staticmethod
 
2452
    def key_id(certificate):
 
2453
        "Convert a certificate bytestring to a hexdigit key ID"
 
2454
        # New GnuTLS "datum" with the public key
 
2455
        datum = gnutls.datum_t(
 
2456
            ctypes.cast(ctypes.c_char_p(certificate),
 
2457
                        ctypes.POINTER(ctypes.c_ubyte)),
 
2458
            ctypes.c_uint(len(certificate)))
 
2459
        # XXX all these need to be created in the gnutls "module"
 
2460
        # New empty GnuTLS certificate
 
2461
        pubkey = gnutls.pubkey_t()
 
2462
        gnutls.pubkey_init(ctypes.byref(pubkey))
 
2463
        # Import the raw public key into the certificate
 
2464
        gnutls.pubkey_import(pubkey,
 
2465
                             ctypes.byref(datum),
 
2466
                             gnutls.X509_FMT_DER)
 
2467
        # New buffer for the key ID
 
2468
        buf = ctypes.create_string_buffer(32)
 
2469
        buf_len = ctypes.c_size_t(len(buf))
 
2470
        # Get the key ID from the raw public key into the buffer
 
2471
        gnutls.pubkey_get_key_id(pubkey,
 
2472
                                 gnutls.KEYID_USE_SHA256,
 
2473
                                 ctypes.cast(ctypes.byref(buf),
 
2474
                                             ctypes.POINTER(ctypes.c_ubyte)),
 
2475
                                 ctypes.byref(buf_len))
 
2476
        # Deinit the certificate
 
2477
        gnutls.pubkey_deinit(pubkey)
 
2478
 
 
2479
        # Convert the buffer to a Python bytestring
 
2480
        key_id = ctypes.string_at(buf, buf_len.value)
 
2481
        # Convert the bytestring to hexadecimal notation
 
2482
        hex_key_id = binascii.hexlify(key_id).upper()
 
2483
        return hex_key_id
 
2484
 
 
2485
    @staticmethod
2349
2486
    def fingerprint(openpgp):
2350
2487
        "Convert an OpenPGP bytestring to a hexdigit fingerprint"
2351
2488
        # New GnuTLS "datum" with the OpenPGP public key
2365
2502
                                       ctypes.byref(crtverify))
2366
2503
        if crtverify.value != 0:
2367
2504
            gnutls.openpgp_crt_deinit(crt)
2368
 
            raise gnutls.CertificateSecurityError("Verify failed")
 
2505
            raise gnutls.CertificateSecurityError(code
 
2506
                                                  =crtverify.value)
2369
2507
        # New buffer for the fingerprint
2370
2508
        buf = ctypes.create_string_buffer(20)
2371
2509
        buf_len = ctypes.c_size_t()
2381
2519
        return hex_fpr
2382
2520
 
2383
2521
 
2384
 
class MultiprocessingMixIn(object):
 
2522
class MultiprocessingMixIn:
2385
2523
    """Like socketserver.ThreadingMixIn, but with multiprocessing"""
2386
2524
 
2387
2525
    def sub_process_main(self, request, address):
2399
2537
        return proc
2400
2538
 
2401
2539
 
2402
 
class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):
 
2540
class MultiprocessingMixInWithPipe(MultiprocessingMixIn):
2403
2541
    """ adds a pipe to the MixIn """
2404
2542
 
2405
2543
    def process_request(self, request, client_address):
2420
2558
 
2421
2559
 
2422
2560
class IPv6_TCPServer(MultiprocessingMixInWithPipe,
2423
 
                     socketserver.TCPServer, object):
 
2561
                     socketserver.TCPServer):
2424
2562
    """IPv6-capable TCP server.  Accepts 'None' as address and/or port
2425
2563
 
2426
2564
    Attributes:
2499
2637
                    raise
2500
2638
        # Only bind(2) the socket if we really need to.
2501
2639
        if self.server_address[0] or self.server_address[1]:
 
2640
            if self.server_address[1]:
 
2641
                self.allow_reuse_address = True
2502
2642
            if not self.server_address[0]:
2503
2643
                if self.address_family == socket.AF_INET6:
2504
2644
                    any_address = "::"  # in6addr_any
2557
2697
    def add_pipe(self, parent_pipe, proc):
2558
2698
        # Call "handle_ipc" for both data and EOF events
2559
2699
        GLib.io_add_watch(
2560
 
            parent_pipe.fileno(),
2561
 
            GLib.IO_IN | GLib.IO_HUP,
 
2700
            GLib.IOChannel.unix_new(parent_pipe.fileno()),
 
2701
            GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2562
2702
            functools.partial(self.handle_ipc,
2563
2703
                              parent_pipe=parent_pipe,
2564
2704
                              proc=proc))
2578
2718
        command = request[0]
2579
2719
 
2580
2720
        if command == 'init':
2581
 
            fpr = request[1].decode("ascii")
2582
 
            address = request[2]
 
2721
            key_id = request[1].decode("ascii")
 
2722
            fpr = request[2].decode("ascii")
 
2723
            address = request[3]
2583
2724
 
2584
2725
            for c in self.clients.values():
2585
 
                if c.fingerprint == fpr:
 
2726
                if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":
 
2727
                    continue
 
2728
                if key_id and c.key_id == key_id:
 
2729
                    client = c
 
2730
                    break
 
2731
                if fpr and c.fingerprint == fpr:
2586
2732
                    client = c
2587
2733
                    break
2588
2734
            else:
2589
 
                logger.info("Client not found for fingerprint: %s, ad"
2590
 
                            "dress: %s", fpr, address)
 
2735
                logger.info("Client not found for key ID: %s, address"
 
2736
                            ": %s", key_id or fpr, address)
2591
2737
                if self.use_dbus:
2592
2738
                    # Emit D-Bus signal
2593
 
                    mandos_dbus_service.ClientNotFound(fpr,
 
2739
                    mandos_dbus_service.ClientNotFound(key_id or fpr,
2594
2740
                                                       address[0])
2595
2741
                parent_pipe.send(False)
2596
2742
                return False
2597
2743
 
2598
2744
            GLib.io_add_watch(
2599
 
                parent_pipe.fileno(),
2600
 
                GLib.IO_IN | GLib.IO_HUP,
 
2745
                GLib.IOChannel.unix_new(parent_pipe.fileno()),
 
2746
                GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,
2601
2747
                functools.partial(self.handle_ipc,
2602
2748
                                  parent_pipe=parent_pipe,
2603
2749
                                  proc=proc,
2618
2764
        if command == 'getattr':
2619
2765
            attrname = request[1]
2620
2766
            if isinstance(client_object.__getattribute__(attrname),
2621
 
                          collections.Callable):
 
2767
                          collections.abc.Callable):
2622
2768
                parent_pipe.send(('function', ))
2623
2769
            else:
2624
2770
                parent_pipe.send((
2635
2781
def rfc3339_duration_to_delta(duration):
2636
2782
    """Parse an RFC 3339 "duration" and return a datetime.timedelta
2637
2783
 
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)
 
2784
    >>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)
 
2785
    True
 
2786
    >>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)
 
2787
    True
 
2788
    >>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)
 
2789
    True
 
2790
    >>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)
 
2791
    True
 
2792
    >>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)
 
2793
    True
 
2794
    >>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)
 
2795
    True
 
2796
    >>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)
 
2797
    True
2652
2798
    """
2653
2799
 
2654
2800
    # Parsing an RFC 3339 duration with regular expressions is not
2734
2880
def string_to_delta(interval):
2735
2881
    """Parse a string and return a datetime.timedelta
2736
2882
 
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)
 
2883
    >>> string_to_delta('7d') == datetime.timedelta(7)
 
2884
    True
 
2885
    >>> string_to_delta('60s') == datetime.timedelta(0, 60)
 
2886
    True
 
2887
    >>> string_to_delta('60m') == datetime.timedelta(0, 3600)
 
2888
    True
 
2889
    >>> string_to_delta('24h') == datetime.timedelta(1)
 
2890
    True
 
2891
    >>> string_to_delta('1w') == datetime.timedelta(7)
 
2892
    True
 
2893
    >>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)
 
2894
    True
2749
2895
    """
2750
2896
 
2751
2897
    try:
2853
2999
 
2854
3000
    options = parser.parse_args()
2855
3001
 
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
 
 
2861
3002
    # Default values for config file for server-global settings
 
3003
    if gnutls.has_rawpk:
 
3004
        priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"
 
3005
                    ":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")
 
3006
    else:
 
3007
        priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
 
3008
                    ":+SIGN-DSA-SHA256")
2862
3009
    server_defaults = {"interface": "",
2863
3010
                       "address": "",
2864
3011
                       "port": "",
2865
3012
                       "debug": "False",
2866
 
                       "priority":
2867
 
                       "SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"
2868
 
                       ":+SIGN-DSA-SHA256",
 
3013
                       "priority": priority,
2869
3014
                       "servicename": "Mandos",
2870
3015
                       "use_dbus": "True",
2871
3016
                       "use_ipv6": "True",
2876
3021
                       "foreground": "False",
2877
3022
                       "zeroconf": "True",
2878
3023
                       }
 
3024
    del priority
2879
3025
 
2880
3026
    # Parse config file for server-global settings
2881
 
    server_config = configparser.SafeConfigParser(server_defaults)
 
3027
    server_config = configparser.ConfigParser(server_defaults)
2882
3028
    del server_defaults
2883
3029
    server_config.read(os.path.join(options.configdir, "mandos.conf"))
2884
 
    # Convert the SafeConfigParser object to a dict
 
3030
    # Convert the ConfigParser object to a dict
2885
3031
    server_settings = server_config.defaults()
2886
3032
    # Use the appropriate methods on the non-string config options
2887
3033
    for option in ("debug", "use_dbus", "use_ipv6", "restore",
2959
3105
                                  server_settings["servicename"])))
2960
3106
 
2961
3107
    # Parse config file with clients
2962
 
    client_config = configparser.SafeConfigParser(Client
2963
 
                                                  .client_defaults)
 
3108
    client_config = configparser.ConfigParser(Client.client_defaults)
2964
3109
    client_config.read(os.path.join(server_settings["configdir"],
2965
3110
                                    "clients.conf"))
2966
3111
 
3037
3182
        # Close all input and output, do double fork, etc.
3038
3183
        daemon()
3039
3184
 
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()
 
3185
    if gi.version_info < (3, 10, 2):
 
3186
        # multiprocessing will use threads, so before we use GLib we
 
3187
        # need to inform GLib that threads will be used.
 
3188
        GLib.threads_init()
3043
3189
 
3044
3190
    global main_loop
3045
3191
    # From the Avahi example code
3121
3267
                             if isinstance(s, bytes)
3122
3268
                             else s) for s in
3123
3269
                            value["client_structure"]]
3124
 
                        # .name & .host
3125
 
                        for k in ("name", "host"):
 
3270
                        # .name, .host, and .checker_command
 
3271
                        for k in ("name", "host", "checker_command"):
3126
3272
                            if isinstance(value[k], bytes):
3127
3273
                                value[k] = value[k].decode("utf-8")
 
3274
                        if "key_id" not in value:
 
3275
                            value["key_id"] = ""
 
3276
                        elif "fingerprint" not in value:
 
3277
                            value["fingerprint"] = ""
3128
3278
                    #  old_client_settings
3129
3279
                    # .keys()
3130
3280
                    old_client_settings = {
3134
3284
                        for key, value in
3135
3285
                        bytes_old_client_settings.items()}
3136
3286
                    del bytes_old_client_settings
3137
 
                    # .host
 
3287
                    # .host and .checker_command
3138
3288
                    for value in old_client_settings.values():
3139
 
                        if isinstance(value["host"], bytes):
3140
 
                            value["host"] = (value["host"]
3141
 
                                             .decode("utf-8"))
 
3289
                        for attribute in ("host", "checker_command"):
 
3290
                            if isinstance(value[attribute], bytes):
 
3291
                                value[attribute] = (value[attribute]
 
3292
                                                    .decode("utf-8"))
3142
3293
            os.remove(stored_state_path)
3143
3294
        except IOError as e:
3144
3295
            if e.errno == errno.ENOENT:
3267
3418
                pass
3268
3419
 
3269
3420
            @dbus.service.signal(_interface, signature="ss")
3270
 
            def ClientNotFound(self, fingerprint, address):
 
3421
            def ClientNotFound(self, key_id, address):
3271
3422
                "D-Bus signal"
3272
3423
                pass
3273
3424
 
3469
3620
                sys.exit(1)
3470
3621
            # End of Avahi example code
3471
3622
 
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))
 
3623
        GLib.io_add_watch(
 
3624
            GLib.IOChannel.unix_new(tcp_server.fileno()),
 
3625
            GLib.PRIORITY_DEFAULT, GLib.IO_IN,
 
3626
            lambda *args, **kwargs: (tcp_server.handle_request
 
3627
                                     (*args[2:], **kwargs) or True))
3476
3628
 
3477
3629
        logger.debug("Starting main loop")
3478
3630
        main_loop.run()
3488
3640
    # Must run before the D-Bus bus name gets deregistered
3489
3641
    cleanup()
3490
3642
 
 
3643
 
 
3644
def should_only_run_tests():
 
3645
    parser = argparse.ArgumentParser(add_help=False)
 
3646
    parser.add_argument("--check", action='store_true')
 
3647
    args, unknown_args = parser.parse_known_args()
 
3648
    run_tests = args.check
 
3649
    if run_tests:
 
3650
        # Remove --check argument from sys.argv
 
3651
        sys.argv[1:] = unknown_args
 
3652
    return run_tests
 
3653
 
 
3654
# Add all tests from doctest strings
 
3655
def load_tests(loader, tests, none):
 
3656
    import doctest
 
3657
    tests.addTests(doctest.DocTestSuite())
 
3658
    return tests
3491
3659
 
3492
3660
if __name__ == '__main__':
3493
 
    main()
 
3661
    try:
 
3662
        if should_only_run_tests():
 
3663
            # Call using ./mandos --check [--verbose]
 
3664
            unittest.main()
 
3665
        else:
 
3666
            main()
 
3667
    finally:
 
3668
        logging.shutdown()