test/ssl_test.c

   1 /*
   2  * Copyright 2016-2023 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
  10 #include <stdio.h>
  11 #include <string.h>
  12
  13 #include <openssl/conf.h>
  14 #include <openssl/err.h>
  15 #include <openssl/ssl.h>
  16 #include <openssl/provider.h>
  17
  18 #include "helpers/handshake.h"
  19 #include "helpers/ssl_test_ctx.h"
  20 #include "testutil.h"
  21
  22 static CONF *conf = NULL;
  23 static OSSL_PROVIDER *defctxnull = NULL, *thisprov = NULL;
  24 static OSSL_LIB_CTX *libctx = NULL;
  25
  26 /* Currently the section names are of the form test-<number>, e.g. test-15. */
  27 #define MAX_TESTCASE_NAME_LENGTH 100
  28
  29 static const char *print_alert(int alert)
  30 {
  31     return alert ? SSL_alert_desc_string_long(alert) : "no alert";
  32 }
  33
  34 static int check_result(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
  35 {
  36     if (!TEST_int_eq(result->result, test_ctx->expected_result)) {
  37         TEST_info("ExpectedResult mismatch: expected %s, got %s.",
  38                   ssl_test_result_name(test_ctx->expected_result),
  39                   ssl_test_result_name(result->result));
  40         return 0;
  41     }
  42     return 1;
  43 }
  44
  45 static int check_alerts(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
  46 {
  47     if (!TEST_int_eq(result->client_alert_sent,
  48                      result->client_alert_received)) {
  49         TEST_info("Client sent alert %s but server received %s.",
  50                   print_alert(result->client_alert_sent),
  51                   print_alert(result->client_alert_received));
  52         /*
  53          * We can't bail here because the peer doesn't always get far enough
  54          * to process a received alert. Specifically, in protocol version
  55          * negotiation tests, we have the following scenario.
  56          * Client supports TLS v1.2 only; Server supports TLS v1.1.
  57          * Client proposes TLS v1.2; server responds with 1.1;
  58          * Client now sends a protocol alert, using TLS v1.2 in the header.
  59          * The server, however, rejects the alert because of version mismatch
  60          * in the record layer; therefore, the server appears to never
  61          * receive the alert.
  62          */
  63         /* return 0; */
  64     }
  65
  66     if (!TEST_int_eq(result->server_alert_sent,
  67                      result->server_alert_received)) {
  68         TEST_info("Server sent alert %s but client received %s.",
  69                   print_alert(result->server_alert_sent),
  70                   print_alert(result->server_alert_received));
  71         /* return 0; */
  72     }
  73
  74     /* Tolerate an alert if one wasn't explicitly specified in the test. */
  75     if (test_ctx->expected_client_alert
  76         /*
  77          * The info callback alert value is computed as
  78          * (s->s3->send_alert[0] << 8) | s->s3->send_alert[1]
  79          * where the low byte is the alert code and the high byte is other stuff.
  80          */
  81         && (result->client_alert_sent & 0xff) != test_ctx->expected_client_alert) {
  82         TEST_error("ClientAlert mismatch: expected %s, got %s.",
  83                    print_alert(test_ctx->expected_client_alert),
  84                    print_alert(result->client_alert_sent));
  85         return 0;
  86     }
  87
  88     if (test_ctx->expected_server_alert
  89         && (result->server_alert_sent & 0xff) != test_ctx->expected_server_alert) {
  90         TEST_error("ServerAlert mismatch: expected %s, got %s.",
  91                    print_alert(test_ctx->expected_server_alert),
  92                    print_alert(result->server_alert_sent));
  93         return 0;
  94     }
  95
  96     if (!TEST_int_le(result->client_num_fatal_alerts_sent, 1))
  97         return 0;
  98     if (!TEST_int_le(result->server_num_fatal_alerts_sent, 1))
  99         return 0;
 100     return 1;
 101 }
 102
 103 static int check_protocol(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 104 {
 105     if (!TEST_int_eq(result->client_protocol, result->server_protocol)) {
 106         TEST_info("Client has protocol %s but server has %s.",
 107                   ssl_protocol_name(result->client_protocol),
 108                   ssl_protocol_name(result->server_protocol));
 109         return 0;
 110     }
 111
 112     if (test_ctx->expected_protocol) {
 113         if (!TEST_int_eq(result->client_protocol,
 114                          test_ctx->expected_protocol)) {
 115             TEST_info("Protocol mismatch: expected %s, got %s.\n",
 116                       ssl_protocol_name(test_ctx->expected_protocol),
 117                       ssl_protocol_name(result->client_protocol));
 118             return 0;
 119         }
 120     }
 121     return 1;
 122 }
 123
 124 static int check_servername(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 125 {
 126     if (!TEST_int_eq(result->servername, test_ctx->expected_servername)) {
 127       TEST_info("Client ServerName mismatch, expected %s, got %s.",
 128                 ssl_servername_name(test_ctx->expected_servername),
 129                 ssl_servername_name(result->servername));
 130       return 0;
 131     }
 132   return 1;
 133 }
 134
 135 static int check_session_ticket(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 136 {
 137     if (test_ctx->session_ticket_expected == SSL_TEST_SESSION_TICKET_IGNORE)
 138         return 1;
 139     if (!TEST_int_eq(result->session_ticket,
 140                      test_ctx->session_ticket_expected)) {
 141         TEST_info("Client SessionTicketExpected mismatch, expected %s, got %s.",
 142                   ssl_session_ticket_name(test_ctx->session_ticket_expected),
 143                   ssl_session_ticket_name(result->session_ticket));
 144         return 0;
 145     }
 146     return 1;
 147 }
 148
 149 static int check_session_id(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 150 {
 151     if (test_ctx->session_id_expected == SSL_TEST_SESSION_ID_IGNORE)
 152         return 1;
 153     if (!TEST_int_eq(result->session_id, test_ctx->session_id_expected)) {
 154         TEST_info("Client SessionIdExpected mismatch, expected %s, got %s\n.",
 155                 ssl_session_id_name(test_ctx->session_id_expected),
 156                 ssl_session_id_name(result->session_id));
 157         return 0;
 158     }
 159     return 1;
 160 }
 161
 162 static int check_compression(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 163 {
 164     if (!TEST_int_eq(result->compression, test_ctx->compression_expected))
 165         return 0;
 166     return 1;
 167 }
 168 #ifndef OPENSSL_NO_NEXTPROTONEG
 169 static int check_npn(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 170 {
 171     int ret = 1;
 172     if (!TEST_str_eq(result->client_npn_negotiated,
 173                      result->server_npn_negotiated))
 174         ret = 0;
 175     if (!TEST_str_eq(test_ctx->expected_npn_protocol,
 176                      result->client_npn_negotiated))
 177         ret = 0;
 178     return ret;
 179 }
 180 #endif
 181
 182 static int check_alpn(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 183 {
 184     int ret = 1;
 185     if (!TEST_str_eq(result->client_alpn_negotiated,
 186                      result->server_alpn_negotiated))
 187         ret = 0;
 188     if (!TEST_str_eq(test_ctx->expected_alpn_protocol,
 189                      result->client_alpn_negotiated))
 190         ret = 0;
 191     return ret;
 192 }
 193
 194 static int check_session_ticket_app_data(HANDSHAKE_RESULT *result,
 195                                          SSL_TEST_CTX *test_ctx)
 196 {
 197     size_t result_len = 0;
 198     size_t expected_len = 0;
 199
 200     /* consider empty and NULL strings to be the same */
 201     if (result->result_session_ticket_app_data != NULL)
 202         result_len = strlen(result->result_session_ticket_app_data);
 203     if (test_ctx->expected_session_ticket_app_data != NULL)
 204         expected_len = strlen(test_ctx->expected_session_ticket_app_data);
 205     if (result_len == 0 && expected_len == 0)
 206         return 1;
 207
 208     if (!TEST_str_eq(result->result_session_ticket_app_data,
 209                      test_ctx->expected_session_ticket_app_data))
 210         return 0;
 211
 212     return 1;
 213 }
 214
 215 static int check_resumption(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 216 {
 217     if (!TEST_int_eq(result->client_resumed, result->server_resumed))
 218         return 0;
 219     if (!TEST_int_eq(result->client_resumed, test_ctx->resumption_expected))
 220         return 0;
 221     return 1;
 222 }
 223
 224 static int check_nid(const char *name, int expected_nid, int nid)
 225 {
 226     if (expected_nid == 0 || expected_nid == nid)
 227         return 1;
 228     TEST_error("%s type mismatch, %s vs %s\n",
 229                name, OBJ_nid2ln(expected_nid),
 230                nid == NID_undef ? "absent" : OBJ_nid2ln(nid));
 231     return 0;
 232 }
 233
 234 static void print_ca_names(STACK_OF(X509_NAME) *names)
 235 {
 236     int i;
 237
 238     if (names == NULL || sk_X509_NAME_num(names) == 0) {
 239         TEST_note("    <empty>");
 240         return;
 241     }
 242     for (i = 0; i < sk_X509_NAME_num(names); i++) {
 243         X509_NAME_print_ex(bio_err, sk_X509_NAME_value(names, i), 4,
 244                            XN_FLAG_ONELINE);
 245         BIO_puts(bio_err, "\n");
 246     }
 247 }
 248
 249 static int check_ca_names(const char *name,
 250                           STACK_OF(X509_NAME) *expected_names,
 251                           STACK_OF(X509_NAME) *names)
 252 {
 253     int i;
 254
 255     if (expected_names == NULL)
 256         return 1;
 257     if (names == NULL || sk_X509_NAME_num(names) == 0) {
 258         if (TEST_int_eq(sk_X509_NAME_num(expected_names), 0))
 259             return 1;
 260         goto err;
 261     }
 262     if (sk_X509_NAME_num(names) != sk_X509_NAME_num(expected_names))
 263         goto err;
 264     for (i = 0; i < sk_X509_NAME_num(names); i++) {
 265         if (!TEST_int_eq(X509_NAME_cmp(sk_X509_NAME_value(names, i),
 266                                        sk_X509_NAME_value(expected_names, i)),
 267                          0)) {
 268             goto err;
 269         }
 270     }
 271     return 1;
 272 err:
 273     TEST_info("%s: list mismatch", name);
 274     TEST_note("Expected Names:");
 275     print_ca_names(expected_names);
 276     TEST_note("Received Names:");
 277     print_ca_names(names);
 278     return 0;
 279 }
 280
 281 static int check_tmp_key(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 282 {
 283     return check_nid("Tmp key", test_ctx->expected_tmp_key_type,
 284                      result->tmp_key_type);
 285 }
 286
 287 static int check_server_cert_type(HANDSHAKE_RESULT *result,
 288                                   SSL_TEST_CTX *test_ctx)
 289 {
 290     return check_nid("Server certificate", test_ctx->expected_server_cert_type,
 291                      result->server_cert_type);
 292 }
 293
 294 static int check_server_sign_hash(HANDSHAKE_RESULT *result,
 295                                   SSL_TEST_CTX *test_ctx)
 296 {
 297     return check_nid("Server signing hash", test_ctx->expected_server_sign_hash,
 298                      result->server_sign_hash);
 299 }
 300
 301 static int check_server_sign_type(HANDSHAKE_RESULT *result,
 302                                   SSL_TEST_CTX *test_ctx)
 303 {
 304     return check_nid("Server signing", test_ctx->expected_server_sign_type,
 305                      result->server_sign_type);
 306 }
 307
 308 static int check_server_ca_names(HANDSHAKE_RESULT *result,
 309                                  SSL_TEST_CTX *test_ctx)
 310 {
 311     return check_ca_names("Server CA names",
 312                           test_ctx->expected_server_ca_names,
 313                           result->server_ca_names);
 314 }
 315
 316 static int check_client_cert_type(HANDSHAKE_RESULT *result,
 317                                   SSL_TEST_CTX *test_ctx)
 318 {
 319     return check_nid("Client certificate", test_ctx->expected_client_cert_type,
 320                      result->client_cert_type);
 321 }
 322
 323 static int check_client_sign_hash(HANDSHAKE_RESULT *result,
 324                                   SSL_TEST_CTX *test_ctx)
 325 {
 326     return check_nid("Client signing hash", test_ctx->expected_client_sign_hash,
 327                      result->client_sign_hash);
 328 }
 329
 330 static int check_client_sign_type(HANDSHAKE_RESULT *result,
 331                                   SSL_TEST_CTX *test_ctx)
 332 {
 333     return check_nid("Client signing", test_ctx->expected_client_sign_type,
 334                      result->client_sign_type);
 335 }
 336
 337 static int check_client_ca_names(HANDSHAKE_RESULT *result,
 338                                  SSL_TEST_CTX *test_ctx)
 339 {
 340     return check_ca_names("Client CA names",
 341                           test_ctx->expected_client_ca_names,
 342                           result->client_ca_names);
 343 }
 344
 345 static int check_cipher(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 346 {
 347     if (test_ctx->expected_cipher == NULL)
 348         return 1;
 349     if (!TEST_ptr(result->cipher))
 350         return 0;
 351     if (!TEST_str_eq(test_ctx->expected_cipher,
 352                      result->cipher))
 353         return 0;
 354     return 1;
 355 }
 356
 357 /*
 358  * This could be further simplified by constructing an expected
 359  * HANDSHAKE_RESULT, and implementing comparison methods for
 360  * its fields.
 361  */
 362 static int check_test(HANDSHAKE_RESULT *result, SSL_TEST_CTX *test_ctx)
 363 {
 364     int ret = 1;
 365     ret &= check_result(result, test_ctx);
 366     ret &= check_alerts(result, test_ctx);
 367     if (result->result == SSL_TEST_SUCCESS) {
 368         ret &= check_protocol(result, test_ctx);
 369         ret &= check_servername(result, test_ctx);
 370         ret &= check_session_ticket(result, test_ctx);
 371         ret &= check_compression(result, test_ctx);
 372         ret &= check_session_id(result, test_ctx);
 373         ret &= (result->session_ticket_do_not_call == 0);
 374 #ifndef OPENSSL_NO_NEXTPROTONEG
 375         ret &= check_npn(result, test_ctx);
 376 #endif
 377         ret &= check_cipher(result, test_ctx);
 378         ret &= check_alpn(result, test_ctx);
 379         ret &= check_session_ticket_app_data(result, test_ctx);
 380         ret &= check_resumption(result, test_ctx);
 381         ret &= check_tmp_key(result, test_ctx);
 382         ret &= check_server_cert_type(result, test_ctx);
 383         ret &= check_server_sign_hash(result, test_ctx);
 384         ret &= check_server_sign_type(result, test_ctx);
 385         ret &= check_server_ca_names(result, test_ctx);
 386         ret &= check_client_cert_type(result, test_ctx);
 387         ret &= check_client_sign_hash(result, test_ctx);
 388         ret &= check_client_sign_type(result, test_ctx);
 389         ret &= check_client_ca_names(result, test_ctx);
 390     }
 391     return ret;
 392 }
 393
 394 static int test_handshake(int idx)
 395 {
 396     int ret = 0;
 397     SSL_CTX *server_ctx = NULL, *server2_ctx = NULL, *client_ctx = NULL,
 398         *resume_server_ctx = NULL, *resume_client_ctx = NULL;
 399     SSL_TEST_CTX *test_ctx = NULL;
 400     HANDSHAKE_RESULT *result = NULL;
 401     char test_app[MAX_TESTCASE_NAME_LENGTH];
 402
 403     BIO_snprintf(test_app, sizeof(test_app), "test-%d", idx);
 404
 405     test_ctx = SSL_TEST_CTX_create(conf, test_app, libctx);
 406     if (!TEST_ptr(test_ctx))
 407         goto err;
 408
 409     /* Verify that the FIPS provider supports this test */
 410     if (test_ctx->fips_version != NULL
 411                 && !fips_provider_version_match(libctx, test_ctx->fips_version)) {
 412             ret = TEST_skip("FIPS provider unable to run this test");
 413             goto err;
 414     }
 415
 416 #ifndef OPENSSL_NO_DTLS
 417     if (test_ctx->method == SSL_TEST_METHOD_DTLS) {
 418         server_ctx = SSL_CTX_new_ex(libctx, NULL, DTLS_server_method());
 419         if (!TEST_true(SSL_CTX_set_options(server_ctx,
 420                         SSL_OP_ALLOW_CLIENT_RENEGOTIATION))
 421                 || !TEST_true(SSL_CTX_set_max_proto_version(server_ctx, 0)))
 422             goto err;
 423         if (test_ctx->extra.server.servername_callback !=
 424             SSL_TEST_SERVERNAME_CB_NONE) {
 425             if (!TEST_ptr(server2_ctx =
 426                             SSL_CTX_new_ex(libctx, NULL, DTLS_server_method()))
 427                     || !TEST_true(SSL_CTX_set_options(server2_ctx,
 428                             SSL_OP_ALLOW_CLIENT_RENEGOTIATION)))
 429                 goto err;
 430         }
 431         client_ctx = SSL_CTX_new_ex(libctx, NULL, DTLS_client_method());
 432         if (!TEST_true(SSL_CTX_set_max_proto_version(client_ctx, 0)))
 433             goto err;
 434         if (test_ctx->handshake_mode == SSL_TEST_HANDSHAKE_RESUME) {
 435             resume_server_ctx = SSL_CTX_new_ex(libctx, NULL,
 436                                                DTLS_server_method());
 437             if (!TEST_true(SSL_CTX_set_max_proto_version(resume_server_ctx, 0))
 438                     || !TEST_true(SSL_CTX_set_options(resume_server_ctx,
 439                             SSL_OP_ALLOW_CLIENT_RENEGOTIATION)))
 440                 goto err;
 441             resume_client_ctx = SSL_CTX_new_ex(libctx, NULL,
 442                                                DTLS_client_method());
 443             if (!TEST_true(SSL_CTX_set_max_proto_version(resume_client_ctx, 0)))
 444                 goto err;
 445             if (!TEST_ptr(resume_server_ctx)
 446                     || !TEST_ptr(resume_client_ctx))
 447                 goto err;
 448         }
 449     }
 450 #endif
 451     if (test_ctx->method == SSL_TEST_METHOD_TLS) {
 452 #if !defined(OPENSSL_NO_TLS1_3) \
 453     && defined(OPENSSL_NO_EC) \
 454     && defined(OPENSSL_NO_DH)
 455         /* Without ec or dh there are no built-in groups for TLSv1.3 */
 456         int maxversion = TLS1_2_VERSION;
 457 #else
 458         int maxversion = 0;
 459 #endif
 460
 461         server_ctx = SSL_CTX_new_ex(libctx, NULL, TLS_server_method());
 462         if (!TEST_true(SSL_CTX_set_max_proto_version(server_ctx, maxversion))
 463                 || !TEST_true(SSL_CTX_set_options(server_ctx,
 464                             SSL_OP_ALLOW_CLIENT_RENEGOTIATION)))
 465             goto err;
 466         /* SNI on resumption isn't supported/tested yet. */
 467         if (test_ctx->extra.server.servername_callback !=
 468             SSL_TEST_SERVERNAME_CB_NONE) {
 469             if (!TEST_ptr(server2_ctx =
 470                             SSL_CTX_new_ex(libctx, NULL, TLS_server_method()))
 471                     || !TEST_true(SSL_CTX_set_options(server2_ctx,
 472                             SSL_OP_ALLOW_CLIENT_RENEGOTIATION)))
 473                 goto err;
 474             if (!TEST_true(SSL_CTX_set_max_proto_version(server2_ctx,
 475                                                          maxversion)))
 476                 goto err;
 477         }
 478         client_ctx = SSL_CTX_new_ex(libctx, NULL, TLS_client_method());
 479         if (!TEST_true(SSL_CTX_set_max_proto_version(client_ctx, maxversion)))
 480             goto err;
 481
 482         if (test_ctx->handshake_mode == SSL_TEST_HANDSHAKE_RESUME) {
 483             resume_server_ctx = SSL_CTX_new_ex(libctx, NULL,
 484                                                TLS_server_method());
 485             if (!TEST_true(SSL_CTX_set_max_proto_version(resume_server_ctx,
 486                                                          maxversion))
 487                     || !TEST_true(SSL_CTX_set_options(resume_server_ctx,
 488                             SSL_OP_ALLOW_CLIENT_RENEGOTIATION)))
 489                 goto err;
 490             resume_client_ctx = SSL_CTX_new_ex(libctx, NULL,
 491                                                TLS_client_method());
 492             if (!TEST_true(SSL_CTX_set_max_proto_version(resume_client_ctx,
 493                                                          maxversion)))
 494                 goto err;
 495             if (!TEST_ptr(resume_server_ctx)
 496                     || !TEST_ptr(resume_client_ctx))
 497                 goto err;
 498         }
 499     }
 500
 501 #ifdef OPENSSL_NO_AUTOLOAD_CONFIG
 502     if (!TEST_true(OPENSSL_init_ssl(OPENSSL_INIT_LOAD_CONFIG, NULL)))
 503         goto err;
 504 #endif
 505
 506     if (!TEST_ptr(server_ctx)
 507             || !TEST_ptr(client_ctx)
 508             || !TEST_int_gt(CONF_modules_load(conf, test_app, 0),  0))
 509         goto err;
 510
 511     if (!SSL_CTX_config(server_ctx, "server")
 512         || !SSL_CTX_config(client_ctx, "client")) {
 513         goto err;
 514     }
 515
 516     if (server2_ctx != NULL && !SSL_CTX_config(server2_ctx, "server2"))
 517         goto err;
 518     if (resume_server_ctx != NULL
 519         && !SSL_CTX_config(resume_server_ctx, "resume-server"))
 520         goto err;
 521     if (resume_client_ctx != NULL
 522         && !SSL_CTX_config(resume_client_ctx, "resume-client"))
 523         goto err;
 524
 525     result = do_handshake(server_ctx, server2_ctx, client_ctx,
 526                           resume_server_ctx, resume_client_ctx, test_ctx);
 527
 528     if (result != NULL)
 529         ret = check_test(result, test_ctx);
 530
 531 err:
 532     CONF_modules_unload(0);
 533     SSL_CTX_free(server_ctx);
 534     SSL_CTX_free(server2_ctx);
 535     SSL_CTX_free(client_ctx);
 536     SSL_CTX_free(resume_server_ctx);
 537     SSL_CTX_free(resume_client_ctx);
 538     SSL_TEST_CTX_free(test_ctx);
 539     HANDSHAKE_RESULT_free(result);
 540     return ret;
 541 }
 542
 543 #define USAGE "conf_file module_name [module_conf_file]\n"
 544 OPT_TEST_DECLARE_USAGE(USAGE)
 545
 546 int setup_tests(void)
 547 {
 548     long num_tests;
 549
 550     if (!test_skip_common_options()) {
 551         TEST_error("Error parsing test options\n");
 552         return 0;
 553     }
 554
 555     if (!TEST_ptr(conf = NCONF_new(NULL))
 556             /* argv[1] should point to the test conf file */
 557             || !TEST_int_gt(NCONF_load(conf, test_get_argument(0), NULL), 0)
 558             || !TEST_int_ne(NCONF_get_number_e(conf, NULL, "num_tests",
 559                                                &num_tests), 0)) {
 560         TEST_error("usage: ssl_test %s", USAGE);
 561         return 0;
 562     }
 563
 564     if (!test_arg_libctx(&libctx, &defctxnull, &thisprov, 1, USAGE))
 565         return 0;
 566
 567     ADD_ALL_TESTS(test_handshake, (int)num_tests);
 568     return 1;
 569 }
 570
 571 void cleanup_tests(void)
 572 {
 573     NCONF_free(conf);
 574     OSSL_PROVIDER_unload(defctxnull);
 575     OSSL_PROVIDER_unload(thisprov);
 576     OSSL_LIB_CTX_free(libctx);
 577 }