_ Git - BearSSL/blob - tools/client.c

   1 /*
   2  * Copyright (c) 2016 Thomas Pornin <pornin@bolet.org>
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining
   5  * a copy of this software and associated documentation files (the
   6  * "Software"), to deal in the Software without restriction, including
   7  * without limitation the rights to use, copy, modify, merge, publish,
   8  * distribute, sublicense, and/or sell copies of the Software, and to
   9  * permit persons to whom the Software is furnished to do so, subject to
  10  * the following conditions:
  11  *
  12  * The above copyright notice and this permission notice shall be
  13  * included in all copies or substantial portions of the Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  17  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  18  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  19  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  20  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  21  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  22  * SOFTWARE.
  23  */
  24
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <stdint.h>
  29 #include <errno.h>
  30
  31 #include <sys/types.h>
  32 #include <sys/socket.h>
  33 #include <netdb.h>
  34 #include <netinet/in.h>
  35 #include <arpa/inet.h>
  36 #include <unistd.h>
  37 #include <fcntl.h>
  38
  39 #include "brssl.h"
  40 #include "bearssl.h"
  41
  42 static int
  43 host_connect(const char *host, const char *port, int verbose)
  44 {
  45         struct addrinfo hints, *si, *p;
  46         int fd;
  47         int err;
  48
  49         memset(&hints, 0, sizeof hints);
  50         hints.ai_family = PF_UNSPEC;
  51         hints.ai_socktype = SOCK_STREAM;
  52         err = getaddrinfo(host, port, &hints, &si);
  53         if (err != 0) {
  54                 fprintf(stderr, "ERROR: getaddrinfo(): %s\n",
  55                         gai_strerror(err));
  56                 return -1;
  57         }
  58         fd = -1;
  59         for (p = si; p != NULL; p = p->ai_next) {
  60                 if (verbose) {
  61                         struct sockaddr *sa;
  62                         void *addr;
  63                         char tmp[INET6_ADDRSTRLEN + 50];
  64
  65                         sa = (struct sockaddr *)p->ai_addr;
  66                         if (sa->sa_family == AF_INET) {
  67                                 addr = &((struct sockaddr_in *)sa)->sin_addr;
  68                         } else if (sa->sa_family == AF_INET6) {
  69                                 addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
  70                         } else {
  71                                 addr = NULL;
  72                         }
  73                         if (addr != NULL) {
  74                                 if (!inet_ntop(p->ai_family, addr,
  75                                         tmp, sizeof tmp))
  76                                 {
  77                                         strcpy(tmp, "<invalid>");
  78                                 }
  79                         } else {
  80                                 sprintf(tmp, "<unknown family: %d>",
  81                                         (int)sa->sa_family);
  82                         }
  83                         fprintf(stderr, "connecting to: %s\n", tmp);
  84                 }
  85                 fd = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
  86                 if (fd < 0) {
  87                         if (verbose) {
  88                                 perror("socket()");
  89                         }
  90                         continue;
  91                 }
  92                 if (connect(fd, p->ai_addr, p->ai_addrlen) < 0) {
  93                         if (verbose) {
  94                                 perror("connect()");
  95                         }
  96                         close(fd);
  97                         continue;
  98                 }
  99                 break;
 100         }
 101         if (p == NULL) {
 102                 freeaddrinfo(si);
 103                 fprintf(stderr, "ERROR: failed to connect\n");
 104                 return -1;
 105         }
 106         freeaddrinfo(si);
 107         if (verbose) {
 108                 fprintf(stderr, "connected.\n");
 109         }
 110
 111         /*
 112          * We make the socket non-blocking, since we are going to use
 113          * poll() to organise I/O.
 114          */
 115         fcntl(fd, F_SETFL, O_NONBLOCK);
 116         return fd;
 117 }
 118
 119 static void
 120 usage_client(void)
 121 {
 122         fprintf(stderr,
 123 "usage: brssl client server[:port] [ options ]\n");
 124         fprintf(stderr,
 125 "options:\n");
 126         fprintf(stderr,
 127 "   -q              suppress verbose messages\n");
 128         fprintf(stderr,
 129 "   -trace          activate extra debug messages (dump of all packets)\n");
 130         fprintf(stderr,
 131 "   -sni name       use this specific name for SNI\n");
 132         fprintf(stderr,
 133 "   -nosni          do not send any SNI\n");
 134         fprintf(stderr,
 135 "   -mono           use monodirectional buffering\n");
 136         fprintf(stderr,
 137 "   -buf length     set the I/O buffer length (in bytes)\n");
 138         fprintf(stderr,
 139 "   -CA file        add certificates in 'file' to trust anchors\n");
 140         fprintf(stderr,
 141 "   -list           list supported names (protocols, algorithms...)\n");
 142         fprintf(stderr,
 143 "   -vmin name      set minimum supported version (default: TLS-1.0)\n");
 144         fprintf(stderr,
 145 "   -vmax name      set maximum supported version (default: TLS-1.2)\n");
 146         fprintf(stderr,
 147 "   -cs names       set list of supported cipher suites (comma-separated)\n");
 148         fprintf(stderr,
 149 "   -hf names       add support for some hash functions (comma-separated)\n");
 150         fprintf(stderr,
 151 "   -minhello len   set minimum ClientHello length (in bytes)\n");
 152         fprintf(stderr,
 153 "   -fallback       send the TLS_FALLBACK_SCSV (i.e. claim a downgrade)\n");
 154 }
 155
 156 /* see brssl.h */
 157 int
 158 do_client(int argc, char *argv[])
 159 {
 160         int retcode;
 161         int verbose;
 162         int trace;
 163         int i, bidi;
 164         const char *server_name;
 165         char *host;
 166         char *port;
 167         const char *sni;
 168         anchor_list anchors = VEC_INIT;
 169         unsigned vmin, vmax;
 170         cipher_suite *suites;
 171         size_t num_suites;
 172         uint16_t *suite_ids;
 173         unsigned hfuns;
 174         size_t u;
 175         br_ssl_client_context cc;
 176         br_x509_minimal_context xc;
 177         x509_noanchor_context xwc;
 178         const br_hash_class *dnhash;
 179         unsigned char *iobuf;
 180         size_t iobuf_len;
 181         size_t minhello_len;
 182         int fallback;
 183         int fd;
 184
 185         retcode = 0;
 186         verbose = 1;
 187         trace = 0;
 188         server_name = NULL;
 189         host = NULL;
 190         port = NULL;
 191         sni = NULL;
 192         bidi = 1;
 193         vmin = 0;
 194         vmax = 0;
 195         suites = NULL;
 196         num_suites = 0;
 197         hfuns = 0;
 198         suite_ids = NULL;
 199         iobuf = NULL;
 200         iobuf_len = 0;
 201         minhello_len = (size_t)-1;
 202         fallback = 0;
 203         fd = -1;
 204         for (i = 0; i < argc; i ++) {
 205                 const char *arg;
 206
 207                 arg = argv[i];
 208                 if (arg[0] != '-') {
 209                         if (server_name != NULL) {
 210                                 fprintf(stderr,
 211                                         "ERROR: duplicate server name\n");
 212                                 usage_client();
 213                                 goto client_exit_error;
 214                         }
 215                         server_name = arg;
 216                         continue;
 217                 }
 218                 if (eqstr(arg, "-v") || eqstr(arg, "-verbose")) {
 219                         verbose = 1;
 220                 } else if (eqstr(arg, "-q") || eqstr(arg, "-quiet")) {
 221                         verbose = 0;
 222                 } else if (eqstr(arg, "-trace")) {
 223                         trace = 1;
 224                 } else if (eqstr(arg, "-sni")) {
 225                         if (++ i >= argc) {
 226                                 fprintf(stderr,
 227                                         "ERROR: no argument for '-sni'\n");
 228                                 usage_client();
 229                                 goto client_exit_error;
 230                         }
 231                         if (sni != NULL) {
 232                                 fprintf(stderr, "ERROR: duplicate SNI\n");
 233                                 usage_client();
 234                                 goto client_exit_error;
 235                         }
 236                         sni = argv[i];
 237                 } else if (eqstr(arg, "-nosni")) {
 238                         if (sni != NULL) {
 239                                 fprintf(stderr, "ERROR: duplicate SNI\n");
 240                                 usage_client();
 241                                 goto client_exit_error;
 242                         }
 243                         sni = "";
 244                 } else if (eqstr(arg, "-mono")) {
 245                         bidi = 0;
 246                 } else if (eqstr(arg, "-buf")) {
 247                         if (++ i >= argc) {
 248                                 fprintf(stderr,
 249                                         "ERROR: no argument for '-buf'\n");
 250                                 usage_client();
 251                                 goto client_exit_error;
 252                         }
 253                         arg = argv[i];
 254                         if (iobuf_len != 0) {
 255                                 fprintf(stderr,
 256                                         "ERROR: duplicate I/O buffer length\n");
 257                                 usage_client();
 258                                 goto client_exit_error;
 259                         }
 260                         iobuf_len = parse_size(arg);
 261                         if (iobuf_len == (size_t)-1) {
 262                                 usage_client();
 263                                 goto client_exit_error;
 264                         }
 265                 } else if (eqstr(arg, "-CA")) {
 266                         if (++ i >= argc) {
 267                                 fprintf(stderr,
 268                                         "ERROR: no argument for '-CA'\n");
 269                                 usage_client();
 270                                 goto client_exit_error;
 271                         }
 272                         arg = argv[i];
 273                         if (read_trust_anchors(&anchors, arg) == 0) {
 274                                 usage_client();
 275                                 goto client_exit_error;
 276                         }
 277                 } else if (eqstr(arg, "-list")) {
 278                         list_names();
 279                         goto client_exit;
 280                 } else if (eqstr(arg, "-vmin")) {
 281                         if (++ i >= argc) {
 282                                 fprintf(stderr,
 283                                         "ERROR: no argument for '-vmin'\n");
 284                                 usage_client();
 285                                 goto client_exit_error;
 286                         }
 287                         arg = argv[i];
 288                         if (vmin != 0) {
 289                                 fprintf(stderr,
 290                                         "ERROR: duplicate minimum version\n");
 291                                 usage_client();
 292                                 goto client_exit_error;
 293                         }
 294                         vmin = parse_version(arg, strlen(arg));
 295                         if (vmin == 0) {
 296                                 fprintf(stderr,
 297                                         "ERROR: unrecognised version '%s'\n",
 298                                         arg);
 299                                 usage_client();
 300                                 goto client_exit_error;
 301                         }
 302                 } else if (eqstr(arg, "-vmax")) {
 303                         if (++ i >= argc) {
 304                                 fprintf(stderr,
 305                                         "ERROR: no argument for '-vmax'\n");
 306                                 usage_client();
 307                                 goto client_exit_error;
 308                         }
 309                         arg = argv[i];
 310                         if (vmax != 0) {
 311                                 fprintf(stderr,
 312                                         "ERROR: duplicate maximum version\n");
 313                                 usage_client();
 314                                 goto client_exit_error;
 315                         }
 316                         vmax = parse_version(arg, strlen(arg));
 317                         if (vmax == 0) {
 318                                 fprintf(stderr,
 319                                         "ERROR: unrecognised version '%s'\n",
 320                                         arg);
 321                                 usage_client();
 322                                 goto client_exit_error;
 323                         }
 324                 } else if (eqstr(arg, "-cs")) {
 325                         if (++ i >= argc) {
 326                                 fprintf(stderr,
 327                                         "ERROR: no argument for '-cs'\n");
 328                                 usage_client();
 329                                 goto client_exit_error;
 330                         }
 331                         arg = argv[i];
 332                         if (suites != NULL) {
 333                                 fprintf(stderr, "ERROR: duplicate list"
 334                                         " of cipher suites\n");
 335                                 usage_client();
 336                                 goto client_exit_error;
 337                         }
 338                         suites = parse_suites(arg, &num_suites);
 339                         if (suites == NULL) {
 340                                 usage_client();
 341                                 goto client_exit_error;
 342                         }
 343                 } else if (eqstr(arg, "-hf")) {
 344                         unsigned x;
 345
 346                         if (++ i >= argc) {
 347                                 fprintf(stderr,
 348                                         "ERROR: no argument for '-hf'\n");
 349                                 usage_client();
 350                                 goto client_exit_error;
 351                         }
 352                         arg = argv[i];
 353                         x = parse_hash_functions(arg);
 354                         if (x == 0) {
 355                                 usage_client();
 356                                 goto client_exit_error;
 357                         }
 358                         hfuns |= x;
 359                 } else if (eqstr(arg, "-minhello")) {
 360                         if (++ i >= argc) {
 361                                 fprintf(stderr,
 362                                         "ERROR: no argument for '-minhello'\n");
 363                                 usage_client();
 364                                 goto client_exit_error;
 365                         }
 366                         arg = argv[i];
 367                         if (minhello_len != (size_t)-1) {
 368                                 fprintf(stderr, "ERROR: duplicate minium"
 369                                         " ClientHello length\n");
 370                                 usage_client();
 371                                 goto client_exit_error;
 372                         }
 373                         minhello_len = parse_size(arg);
 374                         /*
 375                          * Minimum ClientHello length must fit on 16 bits.
 376                          */
 377                         if (minhello_len == (size_t)-1
 378                                 || (((minhello_len >> 12) >> 4) != 0))
 379                         {
 380                                 usage_client();
 381                                 goto client_exit_error;
 382                         }
 383                 } else if (eqstr(arg, "-fallback")) {
 384                         fallback = 1;
 385                 } else {
 386                         fprintf(stderr, "ERROR: unknown option: '%s'\n", arg);
 387                         usage_client();
 388                         goto client_exit_error;
 389                 }
 390         }
 391         if (server_name == NULL) {
 392                 fprintf(stderr, "ERROR: no server name/address provided\n");
 393                 usage_client();
 394                 goto client_exit_error;
 395         }
 396         for (u = strlen(server_name); u > 0; u --) {
 397                 int c = server_name[u - 1];
 398                 if (c == ':') {
 399                         break;
 400                 }
 401                 if (c < '0' || c > '9') {
 402                         u = 0;
 403                         break;
 404                 }
 405         }
 406         if (u == 0) {
 407                 host = xstrdup(server_name);
 408                 port = "443";
 409         } else {
 410                 port = xstrdup(server_name + u);
 411                 host = xmalloc(u);
 412                 memcpy(host, server_name, u - 1);
 413                 host[u - 1] = 0;
 414         }
 415         if (sni == NULL) {
 416                 sni = host;
 417         }
 418
 419         if (vmin == 0) {
 420                 vmin = BR_TLS10;
 421         }
 422         if (vmax == 0) {
 423                 vmax = BR_TLS12;
 424         }
 425         if (vmax < vmin) {
 426                 fprintf(stderr, "ERROR: impossible minimum/maximum protocol"
 427                         " version combination\n");
 428                 usage_client();
 429                 goto client_exit_error;
 430         }
 431         if (suites == NULL) {
 432                 num_suites = 0;
 433
 434                 for (u = 0; cipher_suites[u].name; u ++) {
 435                         if ((cipher_suites[u].req & REQ_TLS12) == 0
 436                                 || vmax >= BR_TLS12)
 437                         {
 438                                 num_suites ++;
 439                         }
 440                 }
 441                 suites = xmalloc(num_suites * sizeof *suites);
 442                 num_suites = 0;
 443                 for (u = 0; cipher_suites[u].name; u ++) {
 444                         if ((cipher_suites[u].req & REQ_TLS12) == 0
 445                                 || vmax >= BR_TLS12)
 446                         {
 447                                 suites[num_suites ++] = cipher_suites[u];
 448                         }
 449                 }
 450         }
 451         if (hfuns == 0) {
 452                 hfuns = (unsigned)-1;
 453         }
 454         if (iobuf_len == 0) {
 455                 if (bidi) {
 456                         iobuf_len = BR_SSL_BUFSIZE_BIDI;
 457                 } else {
 458                         iobuf_len = BR_SSL_BUFSIZE_MONO;
 459                 }
 460         }
 461         iobuf = xmalloc(iobuf_len);
 462
 463         /*
 464          * Compute implementation requirements and inject implementations.
 465          */
 466         suite_ids = xmalloc((num_suites + 1) * sizeof *suite_ids);
 467         br_ssl_client_zero(&cc);
 468         br_ssl_engine_set_versions(&cc.eng, vmin, vmax);
 469         dnhash = NULL;
 470         for (u = 0; hash_functions[u].name; u ++) {
 471                 const br_hash_class *hc;
 472                 int id;
 473
 474                 hc = hash_functions[u].hclass;
 475                 id = (hc->desc >> BR_HASHDESC_ID_OFF) & BR_HASHDESC_ID_MASK;
 476                 if ((hfuns & ((unsigned)1 << id)) != 0) {
 477                         dnhash = hc;
 478                 }
 479         }
 480         if (dnhash == NULL) {
 481                 fprintf(stderr, "ERROR: no supported hash function\n");
 482                 goto client_exit_error;
 483         }
 484         br_x509_minimal_init(&xc, dnhash,
 485                 &VEC_ELT(anchors, 0), VEC_LEN(anchors));
 486         if (vmin <= BR_TLS11) {
 487                 if (!(hfuns & (1 << br_md5_ID))) {
 488                         fprintf(stderr, "ERROR: TLS 1.0 and 1.1 need MD5\n");
 489                         goto client_exit_error;
 490                 }
 491                 if (!(hfuns & (1 << br_sha1_ID))) {
 492                         fprintf(stderr, "ERROR: TLS 1.0 and 1.1 need SHA-1\n");
 493                         goto client_exit_error;
 494                 }
 495         }
 496         for (u = 0; u < num_suites; u ++) {
 497                 unsigned req;
 498
 499                 req = suites[u].req;
 500                 suite_ids[u] = suites[u].suite;
 501                 if ((req & REQ_TLS12) != 0 && vmax < BR_TLS12) {
 502                         fprintf(stderr,
 503                                 "ERROR: cipher suite %s requires TLS 1.2\n",
 504                                 suites[u].name);
 505                         goto client_exit_error;
 506                 }
 507                 if ((req & REQ_SHA1) != 0 && !(hfuns & (1 << br_sha1_ID))) {
 508                         fprintf(stderr,
 509                                 "ERROR: cipher suite %s requires SHA-1\n",
 510                                 suites[u].name);
 511                         goto client_exit_error;
 512                 }
 513                 if ((req & REQ_SHA256) != 0 && !(hfuns & (1 << br_sha256_ID))) {
 514                         fprintf(stderr,
 515                                 "ERROR: cipher suite %s requires SHA-256\n",
 516                                 suites[u].name);
 517                         goto client_exit_error;
 518                 }
 519                 if ((req & REQ_SHA384) != 0 && !(hfuns & (1 << br_sha384_ID))) {
 520                         fprintf(stderr,
 521                                 "ERROR: cipher suite %s requires SHA-384\n",
 522                                 suites[u].name);
 523                         goto client_exit_error;
 524                 }
 525                 /* TODO: algorithm implementation selection */
 526                 if ((req & REQ_AESCBC) != 0) {
 527                         br_ssl_engine_set_aes_cbc(&cc.eng,
 528                                 &br_aes_ct_cbcenc_vtable,
 529                                 &br_aes_ct_cbcdec_vtable);
 530                         br_ssl_engine_set_cbc(&cc.eng,
 531                                 &br_sslrec_in_cbc_vtable,
 532                                 &br_sslrec_out_cbc_vtable);
 533                 }
 534                 if ((req & REQ_AESGCM) != 0) {
 535                         br_ssl_engine_set_aes_ctr(&cc.eng,
 536                                 &br_aes_ct_ctr_vtable);
 537                         br_ssl_engine_set_ghash(&cc.eng,
 538                                 &br_ghash_ctmul);
 539                         br_ssl_engine_set_gcm(&cc.eng,
 540                                 &br_sslrec_in_gcm_vtable,
 541                                 &br_sslrec_out_gcm_vtable);
 542                 }
 543                 if ((req & REQ_3DESCBC) != 0) {
 544                         br_ssl_engine_set_des_cbc(&cc.eng,
 545                                 &br_des_ct_cbcenc_vtable,
 546                                 &br_des_ct_cbcdec_vtable);
 547                         br_ssl_engine_set_cbc(&cc.eng,
 548                                 &br_sslrec_in_cbc_vtable,
 549                                 &br_sslrec_out_cbc_vtable);
 550                 }
 551                 if ((req & REQ_RSAKEYX) != 0) {
 552                         br_ssl_client_set_rsapub(&cc, &br_rsa_i31_public);
 553                 }
 554                 if ((req & REQ_ECDHE_RSA) != 0) {
 555                         br_ssl_engine_set_ec(&cc.eng, &br_ec_prime_i31);
 556                         br_ssl_client_set_rsavrfy(&cc, &br_rsa_i31_pkcs1_vrfy);
 557                 }
 558                 if ((req & REQ_ECDHE_ECDSA) != 0) {
 559                         br_ssl_engine_set_ec(&cc.eng, &br_ec_prime_i31);
 560                         br_ssl_client_set_ecdsa(&cc, &br_ecdsa_i31_vrfy_asn1);
 561                 }
 562                 if ((req & REQ_ECDH) != 0) {
 563                         br_ssl_engine_set_ec(&cc.eng, &br_ec_prime_i31);
 564                 }
 565         }
 566         if (fallback) {
 567                 suite_ids[num_suites ++] = 0x5600;
 568         }
 569         br_ssl_engine_set_suites(&cc.eng, suite_ids, num_suites);
 570
 571         for (u = 0; hash_functions[u].name; u ++) {
 572                 const br_hash_class *hc;
 573                 int id;
 574
 575                 hc = hash_functions[u].hclass;
 576                 id = (hc->desc >> BR_HASHDESC_ID_OFF) & BR_HASHDESC_ID_MASK;
 577                 if ((hfuns & ((unsigned)1 << id)) != 0) {
 578                         br_ssl_engine_set_hash(&cc.eng, id, hc);
 579                         br_x509_minimal_set_hash(&xc, id, hc);
 580                 }
 581         }
 582         if (vmin <= BR_TLS11) {
 583                 br_ssl_engine_set_prf10(&cc.eng, &br_tls10_prf);
 584         }
 585         if (vmax >= BR_TLS12) {
 586                 if ((hfuns & ((unsigned)1 << br_sha256_ID)) != 0) {
 587                         br_ssl_engine_set_prf_sha256(&cc.eng,
 588                                 &br_tls12_sha256_prf);
 589                 }
 590                 if ((hfuns & ((unsigned)1 << br_sha384_ID)) != 0) {
 591                         br_ssl_engine_set_prf_sha384(&cc.eng,
 592                                 &br_tls12_sha384_prf);
 593                 }
 594         }
 595         br_x509_minimal_set_rsa(&xc, &br_rsa_i31_pkcs1_vrfy);
 596         br_x509_minimal_set_ecdsa(&xc,
 597                 &br_ec_prime_i31, &br_ecdsa_i31_vrfy_asn1);
 598
 599         /*
 600          * If there is no provided trust anchor, then certificate validation
 601          * will always fail. In that situation, we use our custom wrapper
 602          * that tolerates unknown anchors.
 603          */
 604         if (VEC_LEN(anchors) == 0) {
 605                 if (verbose) {
 606                         fprintf(stderr,
 607                                 "WARNING: no configured trust anchor\n");
 608                 }
 609                 x509_noanchor_init(&xwc, &xc.vtable);
 610                 br_ssl_engine_set_x509(&cc.eng, &xwc.vtable);
 611         } else {
 612                 br_ssl_engine_set_x509(&cc.eng, &xc.vtable);
 613         }
 614
 615         if (minhello_len != (size_t)-1) {
 616                 br_ssl_client_set_min_clienthello_len(&cc, minhello_len);
 617         }
 618
 619         br_ssl_engine_set_buffer(&cc.eng, iobuf, iobuf_len, bidi);
 620         br_ssl_client_reset(&cc, sni, 0);
 621
 622         /*
 623          * Connect to the peer.
 624          */
 625         fd = host_connect(host, port, verbose);
 626         if (fd < 0) {
 627                 goto client_exit_error;
 628         }
 629
 630         /*
 631          * Run the engine until completion.
 632          */
 633         if (run_ssl_engine(&cc.eng, fd,
 634                 (verbose ? RUN_ENGINE_VERBOSE : 0)
 635                 | (trace ? RUN_ENGINE_TRACE : 0)) != 0)
 636         {
 637                 goto client_exit_error;
 638         } else {
 639                 goto client_exit;
 640         }
 641
 642         /*
 643          * Release allocated structures.
 644          */
 645 client_exit:
 646         xfree(host);
 647         xfree(suites);
 648         xfree(suite_ids);
 649         VEC_CLEAREXT(anchors, &free_ta_contents);
 650         xfree(iobuf);
 651         if (fd >= 0) {
 652                 close(fd);
 653         }
 654         return retcode;
 655
 656 client_exit_error:
 657         retcode = -1;
 658         goto client_exit;
 659 }