test/recipes/70-test_tls13messages.t

   1 #! /usr/bin/env perl
   2 # Copyright 2015-2023 The OpenSSL Project Authors. All Rights Reserved.
   3 #
   4 # Licensed under the Apache License 2.0 (the "License").  You may not use
   5 # this file except in compliance with the License.  You can obtain a copy
   6 # in the file LICENSE in the source distribution or at
   7 # https://www.openssl.org/source/license.html
   8
   9 use strict;
  10 use OpenSSL::Test qw/:DEFAULT cmdstr srctop_file srctop_dir bldtop_dir/;
  11 use OpenSSL::Test::Utils;
  12 use File::Temp qw(tempfile);
  13 use TLSProxy::Proxy;
  14 use checkhandshake qw(checkhandshake @handmessages @extensions);
  15
  16 my $test_name = "test_tls13messages";
  17 setup($test_name);
  18
  19 plan skip_all => "TLSProxy isn't usable on $^O"
  20     if $^O =~ /^(VMS)$/;
  21
  22 plan skip_all => "$test_name needs the dynamic engine feature enabled"
  23     if disabled("engine") || disabled("dynamic-engine");
  24
  25 plan skip_all => "$test_name needs the sock feature enabled"
  26     if disabled("sock");
  27
  28 plan skip_all => "$test_name needs TLSv1.3 enabled"
  29     if disabled("tls1_3");
  30
  31 plan skip_all => "$test_name needs EC enabled"
  32     if disabled("ec");
  33
  34 @handmessages = (
  35     [TLSProxy::Message::MT_CLIENT_HELLO,
  36         checkhandshake::ALL_HANDSHAKES],
  37     [TLSProxy::Message::MT_SERVER_HELLO,
  38         checkhandshake::HRR_HANDSHAKE | checkhandshake::HRR_RESUME_HANDSHAKE],
  39     [TLSProxy::Message::MT_CLIENT_HELLO,
  40         checkhandshake::HRR_HANDSHAKE | checkhandshake::HRR_RESUME_HANDSHAKE],
  41     [TLSProxy::Message::MT_SERVER_HELLO,
  42         checkhandshake::ALL_HANDSHAKES],
  43     [TLSProxy::Message::MT_ENCRYPTED_EXTENSIONS,
  44         checkhandshake::ALL_HANDSHAKES],
  45     [TLSProxy::Message::MT_CERTIFICATE_REQUEST,
  46         checkhandshake::CLIENT_AUTH_HANDSHAKE],
  47     [TLSProxy::Message::MT_CERTIFICATE,
  48         checkhandshake::ALL_HANDSHAKES & ~(checkhandshake::RESUME_HANDSHAKE | checkhandshake::HRR_RESUME_HANDSHAKE)],
  49     [TLSProxy::Message::MT_CERTIFICATE_VERIFY,
  50         checkhandshake::ALL_HANDSHAKES & ~(checkhandshake::RESUME_HANDSHAKE | checkhandshake::HRR_RESUME_HANDSHAKE)],
  51     [TLSProxy::Message::MT_FINISHED,
  52         checkhandshake::ALL_HANDSHAKES],
  53     [TLSProxy::Message::MT_CERTIFICATE,
  54         checkhandshake::CLIENT_AUTH_HANDSHAKE],
  55     [TLSProxy::Message::MT_CERTIFICATE_VERIFY,
  56         checkhandshake::CLIENT_AUTH_HANDSHAKE],
  57     [TLSProxy::Message::MT_FINISHED,
  58         checkhandshake::ALL_HANDSHAKES],
  59     [0, 0]
  60 );
  61
  62 @extensions = (
  63     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SERVER_NAME,
  64         TLSProxy::Message::CLIENT,
  65         checkhandshake::SERVER_NAME_CLI_EXTENSION],
  66     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_STATUS_REQUEST,
  67         TLSProxy::Message::CLIENT,
  68         checkhandshake::STATUS_REQUEST_CLI_EXTENSION],
  69     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SUPPORTED_GROUPS,
  70         TLSProxy::Message::CLIENT,
  71         checkhandshake::DEFAULT_EXTENSIONS],
  72     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_EC_POINT_FORMATS,
  73         TLSProxy::Message::CLIENT,
  74         checkhandshake::DEFAULT_EXTENSIONS],
  75     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SIG_ALGS,
  76         TLSProxy::Message::CLIENT,
  77         checkhandshake::DEFAULT_EXTENSIONS],
  78     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_ALPN,
  79         TLSProxy::Message::CLIENT,
  80         checkhandshake::ALPN_CLI_EXTENSION],
  81     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SCT,
  82         TLSProxy::Message::CLIENT,
  83         checkhandshake::SCT_CLI_EXTENSION],
  84     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_ENCRYPT_THEN_MAC,
  85         TLSProxy::Message::CLIENT,
  86         checkhandshake::DEFAULT_EXTENSIONS],
  87     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_EXTENDED_MASTER_SECRET,
  88         TLSProxy::Message::CLIENT,
  89         checkhandshake::DEFAULT_EXTENSIONS],
  90     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SESSION_TICKET,
  91         TLSProxy::Message::CLIENT,
  92         checkhandshake::DEFAULT_EXTENSIONS],
  93     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_KEY_SHARE,
  94         TLSProxy::Message::CLIENT,
  95         checkhandshake::DEFAULT_EXTENSIONS],
  96     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SUPPORTED_VERSIONS,
  97         TLSProxy::Message::CLIENT,
  98         checkhandshake::DEFAULT_EXTENSIONS],
  99     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_PSK_KEX_MODES,
 100         TLSProxy::Message::CLIENT,
 101         checkhandshake::DEFAULT_EXTENSIONS],
 102     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_PSK,
 103         TLSProxy::Message::CLIENT,
 104         checkhandshake::PSK_CLI_EXTENSION],
 105     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_POST_HANDSHAKE_AUTH,
 106         TLSProxy::Message::CLIENT,
 107         checkhandshake::POST_HANDSHAKE_AUTH_CLI_EXTENSION],
 108     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_RENEGOTIATE,
 109         TLSProxy::Message::CLIENT,
 110         checkhandshake::DEFAULT_EXTENSIONS],
 111
 112     [TLSProxy::Message::MT_SERVER_HELLO, TLSProxy::Message::EXT_SUPPORTED_VERSIONS,
 113         TLSProxy::Message::SERVER,
 114         checkhandshake::DEFAULT_EXTENSIONS],
 115     [TLSProxy::Message::MT_SERVER_HELLO, TLSProxy::Message::EXT_KEY_SHARE,
 116         TLSProxy::Message::SERVER,
 117         checkhandshake::KEY_SHARE_HRR_EXTENSION],
 118
 119     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SERVER_NAME,
 120         TLSProxy::Message::CLIENT,
 121         checkhandshake::SERVER_NAME_CLI_EXTENSION],
 122     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_STATUS_REQUEST,
 123         TLSProxy::Message::CLIENT,
 124         checkhandshake::STATUS_REQUEST_CLI_EXTENSION],
 125     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SUPPORTED_GROUPS,
 126         TLSProxy::Message::CLIENT,
 127         checkhandshake::DEFAULT_EXTENSIONS],
 128     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_EC_POINT_FORMATS,
 129         TLSProxy::Message::CLIENT,
 130         checkhandshake::DEFAULT_EXTENSIONS],
 131     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SIG_ALGS,
 132         TLSProxy::Message::CLIENT,
 133         checkhandshake::DEFAULT_EXTENSIONS],
 134     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_ALPN,
 135         TLSProxy::Message::CLIENT,
 136         checkhandshake::ALPN_CLI_EXTENSION],
 137     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SCT,
 138         TLSProxy::Message::CLIENT,
 139         checkhandshake::SCT_CLI_EXTENSION],
 140     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_ENCRYPT_THEN_MAC,
 141         TLSProxy::Message::CLIENT,
 142         checkhandshake::DEFAULT_EXTENSIONS],
 143     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_EXTENDED_MASTER_SECRET,
 144         TLSProxy::Message::CLIENT,
 145         checkhandshake::DEFAULT_EXTENSIONS],
 146     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SESSION_TICKET,
 147         TLSProxy::Message::CLIENT,
 148         checkhandshake::DEFAULT_EXTENSIONS],
 149     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_KEY_SHARE,
 150         TLSProxy::Message::CLIENT,
 151         checkhandshake::DEFAULT_EXTENSIONS],
 152     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_SUPPORTED_VERSIONS,
 153         TLSProxy::Message::CLIENT,
 154         checkhandshake::DEFAULT_EXTENSIONS],
 155     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_PSK_KEX_MODES,
 156         TLSProxy::Message::CLIENT,
 157         checkhandshake::DEFAULT_EXTENSIONS],
 158     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_PSK,
 159         TLSProxy::Message::CLIENT,
 160         checkhandshake::PSK_CLI_EXTENSION],
 161     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_POST_HANDSHAKE_AUTH,
 162         TLSProxy::Message::CLIENT,
 163         checkhandshake::POST_HANDSHAKE_AUTH_CLI_EXTENSION],
 164     [TLSProxy::Message::MT_CLIENT_HELLO, TLSProxy::Message::EXT_RENEGOTIATE,
 165         TLSProxy::Message::CLIENT,
 166         checkhandshake::DEFAULT_EXTENSIONS],
 167
 168     [TLSProxy::Message::MT_SERVER_HELLO, TLSProxy::Message::EXT_SUPPORTED_VERSIONS,
 169         TLSProxy::Message::SERVER,
 170         checkhandshake::DEFAULT_EXTENSIONS],
 171     [TLSProxy::Message::MT_SERVER_HELLO, TLSProxy::Message::EXT_KEY_SHARE,
 172         TLSProxy::Message::SERVER,
 173         checkhandshake::DEFAULT_EXTENSIONS],
 174     [TLSProxy::Message::MT_SERVER_HELLO, TLSProxy::Message::EXT_PSK,
 175         TLSProxy::Message::SERVER,
 176         checkhandshake::PSK_SRV_EXTENSION],
 177
 178     [TLSProxy::Message::MT_ENCRYPTED_EXTENSIONS, TLSProxy::Message::EXT_SERVER_NAME,
 179         TLSProxy::Message::SERVER,
 180         checkhandshake::SERVER_NAME_SRV_EXTENSION],
 181     [TLSProxy::Message::MT_ENCRYPTED_EXTENSIONS, TLSProxy::Message::EXT_ALPN,
 182         TLSProxy::Message::SERVER,
 183         checkhandshake::ALPN_SRV_EXTENSION],
 184     [TLSProxy::Message::MT_ENCRYPTED_EXTENSIONS, TLSProxy::Message::EXT_SUPPORTED_GROUPS,
 185         TLSProxy::Message::SERVER,
 186         checkhandshake::SUPPORTED_GROUPS_SRV_EXTENSION],
 187
 188     [TLSProxy::Message::MT_CERTIFICATE_REQUEST, TLSProxy::Message::EXT_SIG_ALGS,
 189         TLSProxy::Message::SERVER,
 190         checkhandshake::DEFAULT_EXTENSIONS],
 191
 192     [TLSProxy::Message::MT_CERTIFICATE, TLSProxy::Message::EXT_STATUS_REQUEST,
 193         TLSProxy::Message::SERVER,
 194         checkhandshake::STATUS_REQUEST_SRV_EXTENSION],
 195     [TLSProxy::Message::MT_CERTIFICATE, TLSProxy::Message::EXT_SCT,
 196         TLSProxy::Message::SERVER,
 197         checkhandshake::SCT_SRV_EXTENSION],
 198
 199     [0,0,0,0]
 200 );
 201
 202 my $proxy = TLSProxy::Proxy->new(
 203     undef,
 204     cmdstr(app(["openssl"]), display => 1),
 205     srctop_file("apps", "server.pem"),
 206     (!$ENV{HARNESS_ACTIVE} || $ENV{HARNESS_VERBOSE})
 207 );
 208
 209 #Test 1: Check we get all the right messages for a default handshake
 210 (undef, my $session) = tempfile();
 211 $proxy->serverconnects(2);
 212 $proxy->clientflags("-no_rx_cert_comp -sess_out ".$session);
 213 $proxy->sessionfile($session);
 214 $proxy->start() or plan skip_all => "Unable to start up Proxy for tests";
 215 plan tests => 17;
 216 checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 217                checkhandshake::DEFAULT_EXTENSIONS,
 218                "Default handshake test");
 219
 220 #Test 2: Resumption handshake
 221 $proxy->clearClient();
 222 $proxy->clientflags("-no_rx_cert_comp -sess_in ".$session);
 223 $proxy->clientstart();
 224 checkhandshake($proxy, checkhandshake::RESUME_HANDSHAKE,
 225                (checkhandshake::DEFAULT_EXTENSIONS
 226                 | checkhandshake::PSK_CLI_EXTENSION
 227                 | checkhandshake::PSK_SRV_EXTENSION),
 228                "Resumption handshake test");
 229
 230 SKIP: {
 231     skip "No OCSP support in this OpenSSL build", 4
 232         if disabled("ct") || disabled("ec") || disabled("ocsp");
 233     #Test 3: A status_request handshake (client request only)
 234     $proxy->clear();
 235     $proxy->clientflags("-no_rx_cert_comp -status");
 236     $proxy->start();
 237     checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 238                    checkhandshake::DEFAULT_EXTENSIONS
 239                    | checkhandshake::STATUS_REQUEST_CLI_EXTENSION,
 240                    "status_request handshake test (client)");
 241
 242     #Test 4: A status_request handshake (server support only)
 243     $proxy->clear();
 244     $proxy->clientflags("-no_rx_cert_comp");
 245     $proxy->serverflags("-no_rx_cert_comp -status_file "
 246                         .srctop_file("test", "recipes", "ocsp-response.der"));
 247     $proxy->start();
 248     checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 249                    checkhandshake::DEFAULT_EXTENSIONS,
 250                    "status_request handshake test (server)");
 251
 252     #Test 5: A status_request handshake (client and server)
 253     $proxy->clear();
 254     $proxy->clientflags("-no_rx_cert_comp -status");
 255     $proxy->serverflags("-no_rx_cert_comp -status_file "
 256                         .srctop_file("test", "recipes", "ocsp-response.der"));
 257     $proxy->start();
 258     checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 259                    checkhandshake::DEFAULT_EXTENSIONS
 260                    | checkhandshake::STATUS_REQUEST_CLI_EXTENSION
 261                    | checkhandshake::STATUS_REQUEST_SRV_EXTENSION,
 262                    "status_request handshake test");
 263
 264     #Test 6: A status_request handshake (client and server) with client auth
 265     $proxy->clear();
 266     $proxy->clientflags("-no_rx_cert_comp -status -enable_pha -cert "
 267                         .srctop_file("apps", "server.pem"));
 268     $proxy->serverflags("-no_rx_cert_comp -Verify 5 -status_file "
 269                         .srctop_file("test", "recipes", "ocsp-response.der"));
 270     $proxy->start();
 271     checkhandshake($proxy, checkhandshake::CLIENT_AUTH_HANDSHAKE,
 272                    checkhandshake::DEFAULT_EXTENSIONS
 273                    | checkhandshake::STATUS_REQUEST_CLI_EXTENSION
 274                    | checkhandshake::STATUS_REQUEST_SRV_EXTENSION
 275                    | checkhandshake::POST_HANDSHAKE_AUTH_CLI_EXTENSION,
 276                    "status_request handshake with client auth test");
 277 }
 278
 279 #Test 7: A client auth handshake
 280 $proxy->clear();
 281 $proxy->clientflags("-no_rx_cert_comp -enable_pha -cert ".srctop_file("apps", "server.pem"));
 282 $proxy->serverflags("-no_rx_cert_comp -Verify 5");
 283 $proxy->start();
 284 checkhandshake($proxy, checkhandshake::CLIENT_AUTH_HANDSHAKE,
 285                checkhandshake::DEFAULT_EXTENSIONS |
 286                checkhandshake::POST_HANDSHAKE_AUTH_CLI_EXTENSION,
 287                "Client auth handshake test");
 288
 289 #Test 8: Server name handshake (no client request)
 290 $proxy->clear();
 291 $proxy->clientflags("-no_rx_cert_comp -noservername");
 292 $proxy->start();
 293 checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 294                checkhandshake::DEFAULT_EXTENSIONS
 295                & ~checkhandshake::SERVER_NAME_CLI_EXTENSION,
 296                "Server name handshake test (client)");
 297
 298 #Test 9: Server name handshake (server support only)
 299 $proxy->clear();
 300 $proxy->clientflags("-no_rx_cert_comp -noservername");
 301 $proxy->serverflags("-no_rx_cert_comp -servername testhost");
 302 $proxy->start();
 303 checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 304                checkhandshake::DEFAULT_EXTENSIONS
 305                & ~checkhandshake::SERVER_NAME_CLI_EXTENSION,
 306                "Server name handshake test (server)");
 307
 308 #Test 10: Server name handshake (client and server)
 309 $proxy->clear();
 310 $proxy->clientflags("-no_rx_cert_comp -servername testhost");
 311 $proxy->serverflags("-no_rx_cert_comp -servername testhost");
 312 $proxy->start();
 313 checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 314                checkhandshake::DEFAULT_EXTENSIONS
 315                | checkhandshake::SERVER_NAME_SRV_EXTENSION,
 316                "Server name handshake test");
 317
 318 #Test 11: ALPN handshake (client request only)
 319 $proxy->clear();
 320 $proxy->clientflags("-no_rx_cert_comp -alpn test");
 321 $proxy->start();
 322 checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 323                checkhandshake::DEFAULT_EXTENSIONS
 324                | checkhandshake::ALPN_CLI_EXTENSION,
 325                "ALPN handshake test (client)");
 326
 327 #Test 12: ALPN handshake (server support only)
 328 $proxy->clear();
 329 $proxy->clientflags("-no_rx_cert_comp");
 330 $proxy->serverflags("-no_rx_cert_comp -alpn test");
 331 $proxy->start();
 332 checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 333                checkhandshake::DEFAULT_EXTENSIONS,
 334                "ALPN handshake test (server)");
 335
 336 #Test 13: ALPN handshake (client and server)
 337 $proxy->clear();
 338 $proxy->clientflags("-no_rx_cert_comp -alpn test");
 339 $proxy->serverflags("-no_rx_cert_comp -alpn test");
 340 $proxy->start();
 341 checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 342                checkhandshake::DEFAULT_EXTENSIONS
 343                | checkhandshake::ALPN_CLI_EXTENSION
 344                | checkhandshake::ALPN_SRV_EXTENSION,
 345                "ALPN handshake test");
 346
 347 SKIP: {
 348     skip "No CT, EC or OCSP support in this OpenSSL build", 1
 349         if disabled("ct") || disabled("ec") || disabled("ocsp");
 350
 351     #Test 14: SCT handshake (client request only)
 352     $proxy->clear();
 353     #Note: -ct also sends status_request
 354     $proxy->clientflags("-no_rx_cert_comp -ct");
 355     $proxy->serverflags("-no_rx_cert_comp -status_file "
 356                         .srctop_file("test", "recipes", "ocsp-response.der")
 357                         ." -serverinfo ".srctop_file("test", "serverinfo2.pem"));
 358     $proxy->start();
 359     checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 360                    checkhandshake::DEFAULT_EXTENSIONS
 361                    | checkhandshake::SCT_CLI_EXTENSION
 362                    | checkhandshake::SCT_SRV_EXTENSION
 363                    | checkhandshake::STATUS_REQUEST_CLI_EXTENSION
 364                    | checkhandshake::STATUS_REQUEST_SRV_EXTENSION,
 365                    "SCT handshake test");
 366 }
 367
 368 #Test 15: HRR Handshake
 369 $proxy->clear();
 370 $proxy->clientflags("-no_rx_cert_comp");
 371 $proxy->serverflags("-no_rx_cert_comp -curves P-384");
 372 $proxy->start();
 373 checkhandshake($proxy, checkhandshake::HRR_HANDSHAKE,
 374                checkhandshake::DEFAULT_EXTENSIONS
 375                | checkhandshake::KEY_SHARE_HRR_EXTENSION,
 376                "HRR handshake test");
 377
 378 #Test 16: Resumption handshake with HRR
 379 $proxy->clear();
 380 $proxy->clientflags("-no_rx_cert_comp -sess_in ".$session);
 381 $proxy->serverflags("-no_rx_cert_comp -curves P-384");
 382 $proxy->start();
 383 checkhandshake($proxy, checkhandshake::HRR_RESUME_HANDSHAKE,
 384                (checkhandshake::DEFAULT_EXTENSIONS
 385                 | checkhandshake::KEY_SHARE_HRR_EXTENSION
 386                 | checkhandshake::PSK_CLI_EXTENSION
 387                 | checkhandshake::PSK_SRV_EXTENSION),
 388                "Resumption handshake with HRR test");
 389
 390 #Test 17: Acceptable but non preferred key_share
 391 $proxy->clear();
 392 $proxy->clientflags("-no_rx_cert_comp -curves P-384");
 393 $proxy->start();
 394 checkhandshake($proxy, checkhandshake::DEFAULT_HANDSHAKE,
 395                checkhandshake::DEFAULT_EXTENSIONS
 396                | checkhandshake::SUPPORTED_GROUPS_SRV_EXTENSION,
 397                "Acceptable but non preferred key_share");
 398
 399 unlink $session;