_ 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 #include <signal.h>
  31
  32 #include <sys/types.h>
  33 #include <sys/socket.h>
  34 #include <netdb.h>
  35 #include <netinet/in.h>
  36 #include <arpa/inet.h>
  37 #include <unistd.h>
  38 #include <fcntl.h>
  39
  40 #include "brssl.h"
  41 #include "bearssl.h"
  42
  43 static int
  44 host_connect(const char *host, const char *port, int verbose)
  45 {
  46         struct addrinfo hints, *si, *p;
  47         int fd;
  48         int err;
  49
  50         memset(&hints, 0, sizeof hints);
  51         hints.ai_family = PF_UNSPEC;
  52         hints.ai_socktype = SOCK_STREAM;
  53         err = getaddrinfo(host, port, &hints, &si);
  54         if (err != 0) {
  55                 fprintf(stderr, "ERROR: getaddrinfo(): %s\n",
  56                         gai_strerror(err));
  57                 return -1;
  58         }
  59         fd = -1;
  60         for (p = si; p != NULL; p = p->ai_next) {
  61                 if (verbose) {
  62                         struct sockaddr *sa;
  63                         void *addr;
  64                         char tmp[INET6_ADDRSTRLEN + 50];
  65
  66                         sa = (struct sockaddr *)p->ai_addr;
  67                         if (sa->sa_family == AF_INET) {
  68                                 addr = &((struct sockaddr_in *)sa)->sin_addr;
  69                         } else if (sa->sa_family == AF_INET6) {
  70                                 addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
  71                         } else {
  72                                 addr = NULL;
  73                         }
  74                         if (addr != NULL) {
  75                                 if (!inet_ntop(p->ai_family, addr,
  76                                         tmp, sizeof tmp))
  77                                 {
  78                                         strcpy(tmp, "<invalid>");
  79                                 }
  80                         } else {
  81                                 sprintf(tmp, "<unknown family: %d>",
  82                                         (int)sa->sa_family);
  83                         }
  84                         fprintf(stderr, "connecting to: %s\n", tmp);
  85                 }
  86                 fd = socket(p->ai_family, p->ai_socktype, p->ai_protocol);
  87                 if (fd < 0) {
  88                         if (verbose) {
  89                                 perror("socket()");
  90                         }
  91                         continue;
  92                 }
  93                 if (connect(fd, p->ai_addr, p->ai_addrlen) < 0) {
  94                         if (verbose) {
  95                                 perror("connect()");
  96                         }
  97                         close(fd);
  98                         continue;
  99                 }
 100                 break;
 101         }
 102         if (p == NULL) {
 103                 freeaddrinfo(si);
 104                 fprintf(stderr, "ERROR: failed to connect\n");
 105                 return -1;
 106         }
 107         freeaddrinfo(si);
 108         if (verbose) {
 109                 fprintf(stderr, "connected.\n");
 110         }
 111
 112         /*
 113          * We make the socket non-blocking, since we are going to use
 114          * poll() to organise I/O.
 115          */
 116         fcntl(fd, F_SETFL, O_NONBLOCK);
 117         return fd;
 118 }
 119
 120 static void
 121 usage_client(void)
 122 {
 123         fprintf(stderr,
 124 "usage: brssl client server[:port] [ options ]\n");
 125         fprintf(stderr,
 126 "options:\n");
 127         fprintf(stderr,
 128 "   -q              suppress verbose messages\n");
 129         fprintf(stderr,
 130 "   -trace          activate extra debug messages (dump of all packets)\n");
 131         fprintf(stderr,
 132 "   -sni name       use this specific name for SNI\n");
 133         fprintf(stderr,
 134 "   -nosni          do not send any SNI\n");
 135         fprintf(stderr,
 136 "   -mono           use monodirectional buffering\n");
 137         fprintf(stderr,
 138 "   -buf length     set the I/O buffer length (in bytes)\n");
 139         fprintf(stderr,
 140 "   -CA file        add certificates in 'file' to trust anchors\n");
 141         fprintf(stderr,
 142 "   -list           list supported names (protocols, algorithms...)\n");
 143         fprintf(stderr,
 144 "   -vmin name      set minimum supported version (default: TLS-1.0)\n");
 145         fprintf(stderr,
 146 "   -vmax name      set maximum supported version (default: TLS-1.2)\n");
 147         fprintf(stderr,
 148 "   -cs names       set list of supported cipher suites (comma-separated)\n");
 149         fprintf(stderr,
 150 "   -hf names       add support for some hash functions (comma-separated)\n");
 151         fprintf(stderr,
 152 "   -minhello len   set minimum ClientHello length (in bytes)\n");
 153         fprintf(stderr,
 154 "   -fallback       send the TLS_FALLBACK_SCSV (i.e. claim a downgrade)\n");
 155 }
 156
 157 /* see brssl.h */
 158 int
 159 do_client(int argc, char *argv[])
 160 {
 161         int retcode;
 162         int verbose;
 163         int trace;
 164         int i, bidi;
 165         const char *server_name;
 166         char *host;
 167         char *port;
 168         const char *sni;
 169         anchor_list anchors = VEC_INIT;
 170         unsigned vmin, vmax;
 171         cipher_suite *suites;
 172         size_t num_suites;
 173         uint16_t *suite_ids;
 174         unsigned hfuns;
 175         size_t u;
 176         br_ssl_client_context cc;
 177         br_x509_minimal_context xc;
 178         x509_noanchor_context xwc;
 179         const br_hash_class *dnhash;
 180         unsigned char *iobuf;
 181         size_t iobuf_len;
 182         size_t minhello_len;
 183         int fallback;
 184         int fd;
 185
 186         retcode = 0;
 187         verbose = 1;
 188         trace = 0;
 189         server_name = NULL;
 190         host = NULL;
 191         port = NULL;
 192         sni = NULL;
 193         bidi = 1;
 194         vmin = 0;
 195         vmax = 0;
 196         suites = NULL;
 197         num_suites = 0;
 198         hfuns = 0;
 199         suite_ids = NULL;
 200         iobuf = NULL;
 201         iobuf_len = 0;
 202         minhello_len = (size_t)-1;
 203         fallback = 0;
 204         fd = -1;
 205         for (i = 0; i < argc; i ++) {
 206                 const char *arg;
 207
 208                 arg = argv[i];
 209                 if (arg[0] != '-') {
 210                         if (server_name != NULL) {
 211                                 fprintf(stderr,
 212                                         "ERROR: duplicate server name\n");
 213                                 usage_client();
 214                                 goto client_exit_error;
 215                         }
 216                         server_name = arg;
 217                         continue;
 218                 }
 219                 if (eqstr(arg, "-v") || eqstr(arg, "-verbose")) {
 220                         verbose = 1;
 221                 } else if (eqstr(arg, "-q") || eqstr(arg, "-quiet")) {
 222                         verbose = 0;
 223                 } else if (eqstr(arg, "-trace")) {
 224                         trace = 1;
 225                 } else if (eqstr(arg, "-sni")) {
 226                         if (++ i >= argc) {
 227                                 fprintf(stderr,
 228                                         "ERROR: no argument for '-sni'\n");
 229                                 usage_client();
 230                                 goto client_exit_error;
 231                         }
 232                         if (sni != NULL) {
 233                                 fprintf(stderr, "ERROR: duplicate SNI\n");
 234                                 usage_client();
 235                                 goto client_exit_error;
 236                         }
 237                         sni = argv[i];
 238                 } else if (eqstr(arg, "-nosni")) {
 239                         if (sni != NULL) {
 240                                 fprintf(stderr, "ERROR: duplicate SNI\n");
 241                                 usage_client();
 242                                 goto client_exit_error;
 243                         }
 244                         sni = "";
 245                 } else if (eqstr(arg, "-mono")) {
 246                         bidi = 0;
 247                 } else if (eqstr(arg, "-buf")) {
 248                         if (++ i >= argc) {
 249                                 fprintf(stderr,
 250                                         "ERROR: no argument for '-buf'\n");
 251                                 usage_client();
 252                                 goto client_exit_error;
 253                         }
 254                         arg = argv[i];
 255                         if (iobuf_len != 0) {
 256                                 fprintf(stderr,
 257                                         "ERROR: duplicate I/O buffer length\n");
 258                                 usage_client();
 259                                 goto client_exit_error;
 260                         }
 261                         iobuf_len = parse_size(arg);
 262                         if (iobuf_len == (size_t)-1) {
 263                                 usage_client();
 264                                 goto client_exit_error;
 265                         }
 266                 } else if (eqstr(arg, "-CA")) {
 267                         if (++ i >= argc) {
 268                                 fprintf(stderr,
 269                                         "ERROR: no argument for '-CA'\n");
 270                                 usage_client();
 271                                 goto client_exit_error;
 272                         }
 273                         arg = argv[i];
 274                         if (read_trust_anchors(&anchors, arg) == 0) {
 275                                 usage_client();
 276                                 goto client_exit_error;
 277                         }
 278                 } else if (eqstr(arg, "-list")) {
 279                         list_names();
 280                         goto client_exit;
 281                 } else if (eqstr(arg, "-vmin")) {
 282                         if (++ i >= argc) {
 283                                 fprintf(stderr,
 284                                         "ERROR: no argument for '-vmin'\n");
 285                                 usage_client();
 286                                 goto client_exit_error;
 287                         }
 288                         arg = argv[i];
 289                         if (vmin != 0) {
 290                                 fprintf(stderr,
 291                                         "ERROR: duplicate minimum version\n");
 292                                 usage_client();
 293                                 goto client_exit_error;
 294                         }
 295                         vmin = parse_version(arg, strlen(arg));
 296                         if (vmin == 0) {
 297                                 fprintf(stderr,
 298                                         "ERROR: unrecognised version '%s'\n",
 299                                         arg);
 300                                 usage_client();
 301                                 goto client_exit_error;
 302                         }
 303                 } else if (eqstr(arg, "-vmax")) {
 304                         if (++ i >= argc) {
 305                                 fprintf(stderr,
 306                                         "ERROR: no argument for '-vmax'\n");
 307                                 usage_client();
 308                                 goto client_exit_error;
 309                         }
 310                         arg = argv[i];
 311                         if (vmax != 0) {
 312                                 fprintf(stderr,
 313                                         "ERROR: duplicate maximum version\n");
 314                                 usage_client();
 315                                 goto client_exit_error;
 316                         }
 317                         vmax = parse_version(arg, strlen(arg));
 318                         if (vmax == 0) {
 319                                 fprintf(stderr,
 320                                         "ERROR: unrecognised version '%s'\n",
 321                                         arg);
 322                                 usage_client();
 323                                 goto client_exit_error;
 324                         }
 325                 } else if (eqstr(arg, "-cs")) {
 326                         if (++ i >= argc) {
 327                                 fprintf(stderr,
 328                                         "ERROR: no argument for '-cs'\n");
 329                                 usage_client();
 330                                 goto client_exit_error;
 331                         }
 332                         arg = argv[i];
 333                         if (suites != NULL) {
 334                                 fprintf(stderr, "ERROR: duplicate list"
 335                                         " of cipher suites\n");
 336                                 usage_client();
 337                                 goto client_exit_error;
 338                         }
 339                         suites = parse_suites(arg, &num_suites);
 340                         if (suites == NULL) {
 341                                 usage_client();
 342                                 goto client_exit_error;
 343                         }
 344                 } else if (eqstr(arg, "-hf")) {
 345                         unsigned x;
 346
 347                         if (++ i >= argc) {
 348                                 fprintf(stderr,
 349                                         "ERROR: no argument for '-hf'\n");
 350                                 usage_client();
 351                                 goto client_exit_error;
 352                         }
 353                         arg = argv[i];
 354                         x = parse_hash_functions(arg);
 355                         if (x == 0) {
 356                                 usage_client();
 357                                 goto client_exit_error;
 358                         }
 359                         hfuns |= x;
 360                 } else if (eqstr(arg, "-minhello")) {
 361                         if (++ i >= argc) {
 362                                 fprintf(stderr,
 363                                         "ERROR: no argument for '-minhello'\n");
 364                                 usage_client();
 365                                 goto client_exit_error;
 366                         }
 367                         arg = argv[i];
 368                         if (minhello_len != (size_t)-1) {
 369                                 fprintf(stderr, "ERROR: duplicate minium"
 370                                         " ClientHello length\n");
 371                                 usage_client();
 372                                 goto client_exit_error;
 373                         }
 374                         minhello_len = parse_size(arg);
 375                         /*
 376                          * Minimum ClientHello length must fit on 16 bits.
 377                          */
 378                         if (minhello_len == (size_t)-1
 379                                 || (((minhello_len >> 12) >> 4) != 0))
 380                         {
 381                                 usage_client();
 382                                 goto client_exit_error;
 383                         }
 384                 } else if (eqstr(arg, "-fallback")) {
 385                         fallback = 1;
 386                 } else {
 387                         fprintf(stderr, "ERROR: unknown option: '%s'\n", arg);
 388                         usage_client();
 389                         goto client_exit_error;
 390                 }
 391         }
 392         if (server_name == NULL) {
 393                 fprintf(stderr, "ERROR: no server name/address provided\n");
 394                 usage_client();
 395                 goto client_exit_error;
 396         }
 397         for (u = strlen(server_name); u > 0; u --) {
 398                 int c = server_name[u - 1];
 399                 if (c == ':') {
 400                         break;
 401                 }
 402                 if (c < '0' || c > '9') {
 403                         u = 0;
 404                         break;
 405                 }
 406         }
 407         if (u == 0) {
 408                 host = xstrdup(server_name);
 409                 port = "443";
 410         } else {
 411                 port = xstrdup(server_name + u);
 412                 host = xmalloc(u);
 413                 memcpy(host, server_name, u - 1);
 414                 host[u - 1] = 0;
 415         }
 416         if (sni == NULL) {
 417                 sni = host;
 418         }
 419
 420         if (vmin == 0) {
 421                 vmin = BR_TLS10;
 422         }
 423         if (vmax == 0) {
 424                 vmax = BR_TLS12;
 425         }
 426         if (vmax < vmin) {
 427                 fprintf(stderr, "ERROR: impossible minimum/maximum protocol"
 428                         " version combination\n");
 429                 usage_client();
 430                 goto client_exit_error;
 431         }
 432         if (suites == NULL) {
 433                 num_suites = 0;
 434
 435                 for (u = 0; cipher_suites[u].name; u ++) {
 436                         if ((cipher_suites[u].req & REQ_TLS12) == 0
 437                                 || vmax >= BR_TLS12)
 438                         {
 439                                 num_suites ++;
 440                         }
 441                 }
 442                 suites = xmalloc(num_suites * sizeof *suites);
 443                 num_suites = 0;
 444                 for (u = 0; cipher_suites[u].name; u ++) {
 445                         if ((cipher_suites[u].req & REQ_TLS12) == 0
 446                                 || vmax >= BR_TLS12)
 447                         {
 448                                 suites[num_suites ++] = cipher_suites[u];
 449                         }
 450                 }
 451         }
 452         if (hfuns == 0) {
 453                 hfuns = (unsigned)-1;
 454         }
 455         if (iobuf_len == 0) {
 456                 if (bidi) {
 457                         iobuf_len = BR_SSL_BUFSIZE_BIDI;
 458                 } else {
 459                         iobuf_len = BR_SSL_BUFSIZE_MONO;
 460                 }
 461         }
 462         iobuf = xmalloc(iobuf_len);
 463
 464         /*
 465          * Compute implementation requirements and inject implementations.
 466          */
 467         suite_ids = xmalloc((num_suites + 1) * sizeof *suite_ids);
 468         br_ssl_client_zero(&cc);
 469         br_ssl_engine_set_versions(&cc.eng, vmin, vmax);
 470         dnhash = NULL;
 471         for (u = 0; hash_functions[u].name; u ++) {
 472                 const br_hash_class *hc;
 473                 int id;
 474
 475                 hc = hash_functions[u].hclass;
 476                 id = (hc->desc >> BR_HASHDESC_ID_OFF) & BR_HASHDESC_ID_MASK;
 477                 if ((hfuns & ((unsigned)1 << id)) != 0) {
 478                         dnhash = hc;
 479                 }
 480         }
 481         if (dnhash == NULL) {
 482                 fprintf(stderr, "ERROR: no supported hash function\n");
 483                 goto client_exit_error;
 484         }
 485         br_x509_minimal_init(&xc, dnhash,
 486                 &VEC_ELT(anchors, 0), VEC_LEN(anchors));
 487         if (vmin <= BR_TLS11) {
 488                 if (!(hfuns & (1 << br_md5_ID))) {
 489                         fprintf(stderr, "ERROR: TLS 1.0 and 1.1 need MD5\n");
 490                         goto client_exit_error;
 491                 }
 492                 if (!(hfuns & (1 << br_sha1_ID))) {
 493                         fprintf(stderr, "ERROR: TLS 1.0 and 1.1 need SHA-1\n");
 494                         goto client_exit_error;
 495                 }
 496         }
 497         for (u = 0; u < num_suites; u ++) {
 498                 unsigned req;
 499
 500                 req = suites[u].req;
 501                 suite_ids[u] = suites[u].suite;
 502                 if ((req & REQ_TLS12) != 0 && vmax < BR_TLS12) {
 503                         fprintf(stderr,
 504                                 "ERROR: cipher suite %s requires TLS 1.2\n",
 505                                 suites[u].name);
 506                         goto client_exit_error;
 507                 }
 508                 if ((req & REQ_SHA1) != 0 && !(hfuns & (1 << br_sha1_ID))) {
 509                         fprintf(stderr,
 510                                 "ERROR: cipher suite %s requires SHA-1\n",
 511                                 suites[u].name);
 512                         goto client_exit_error;
 513                 }
 514                 if ((req & REQ_SHA256) != 0 && !(hfuns & (1 << br_sha256_ID))) {
 515                         fprintf(stderr,
 516                                 "ERROR: cipher suite %s requires SHA-256\n",
 517                                 suites[u].name);
 518                         goto client_exit_error;
 519                 }
 520                 if ((req & REQ_SHA384) != 0 && !(hfuns & (1 << br_sha384_ID))) {
 521                         fprintf(stderr,
 522                                 "ERROR: cipher suite %s requires SHA-384\n",
 523                                 suites[u].name);
 524                         goto client_exit_error;
 525                 }
 526                 /* TODO: algorithm implementation selection */
 527                 if ((req & REQ_AESCBC) != 0) {
 528                         br_ssl_engine_set_aes_cbc(&cc.eng,
 529                                 &br_aes_ct_cbcenc_vtable,
 530                                 &br_aes_ct_cbcdec_vtable);
 531                         br_ssl_engine_set_cbc(&cc.eng,
 532                                 &br_sslrec_in_cbc_vtable,
 533                                 &br_sslrec_out_cbc_vtable);
 534                 }
 535                 if ((req & REQ_AESGCM) != 0) {
 536                         br_ssl_engine_set_aes_ctr(&cc.eng,
 537                                 &br_aes_ct_ctr_vtable);
 538                         br_ssl_engine_set_ghash(&cc.eng,
 539                                 &br_ghash_ctmul);
 540                         br_ssl_engine_set_gcm(&cc.eng,
 541                                 &br_sslrec_in_gcm_vtable,
 542                                 &br_sslrec_out_gcm_vtable);
 543                 }
 544                 if ((req & REQ_3DESCBC) != 0) {
 545                         br_ssl_engine_set_des_cbc(&cc.eng,
 546                                 &br_des_ct_cbcenc_vtable,
 547                                 &br_des_ct_cbcdec_vtable);
 548                         br_ssl_engine_set_cbc(&cc.eng,
 549                                 &br_sslrec_in_cbc_vtable,
 550                                 &br_sslrec_out_cbc_vtable);
 551                 }
 552                 if ((req & REQ_RSAKEYX) != 0) {
 553                         br_ssl_client_set_rsapub(&cc, &br_rsa_i31_public);
 554                 }
 555                 if ((req & REQ_ECDHE_RSA) != 0) {
 556                         br_ssl_engine_set_ec(&cc.eng, &br_ec_prime_i31);
 557                         br_ssl_client_set_rsavrfy(&cc, &br_rsa_i31_pkcs1_vrfy);
 558                 }
 559                 if ((req & REQ_ECDHE_ECDSA) != 0) {
 560                         br_ssl_engine_set_ec(&cc.eng, &br_ec_prime_i31);
 561                         br_ssl_client_set_ecdsa(&cc, &br_ecdsa_i31_vrfy_asn1);
 562                 }
 563                 if ((req & REQ_ECDH) != 0) {
 564                         br_ssl_engine_set_ec(&cc.eng, &br_ec_prime_i31);
 565                 }
 566         }
 567         if (fallback) {
 568                 suite_ids[num_suites ++] = 0x5600;
 569         }
 570         br_ssl_engine_set_suites(&cc.eng, suite_ids, num_suites);
 571
 572         for (u = 0; hash_functions[u].name; u ++) {
 573                 const br_hash_class *hc;
 574                 int id;
 575
 576                 hc = hash_functions[u].hclass;
 577                 id = (hc->desc >> BR_HASHDESC_ID_OFF) & BR_HASHDESC_ID_MASK;
 578                 if ((hfuns & ((unsigned)1 << id)) != 0) {
 579                         br_ssl_engine_set_hash(&cc.eng, id, hc);
 580                         br_x509_minimal_set_hash(&xc, id, hc);
 581                 }
 582         }
 583         if (vmin <= BR_TLS11) {
 584                 br_ssl_engine_set_prf10(&cc.eng, &br_tls10_prf);
 585         }
 586         if (vmax >= BR_TLS12) {
 587                 if ((hfuns & ((unsigned)1 << br_sha256_ID)) != 0) {
 588                         br_ssl_engine_set_prf_sha256(&cc.eng,
 589                                 &br_tls12_sha256_prf);
 590                 }
 591                 if ((hfuns & ((unsigned)1 << br_sha384_ID)) != 0) {
 592                         br_ssl_engine_set_prf_sha384(&cc.eng,
 593                                 &br_tls12_sha384_prf);
 594                 }
 595         }
 596         br_x509_minimal_set_rsa(&xc, &br_rsa_i31_pkcs1_vrfy);
 597         br_x509_minimal_set_ecdsa(&xc,
 598                 &br_ec_prime_i31, &br_ecdsa_i31_vrfy_asn1);
 599
 600         /*
 601          * If there is no provided trust anchor, then certificate validation
 602          * will always fail. In that situation, we use our custom wrapper
 603          * that tolerates unknown anchors.
 604          */
 605         if (VEC_LEN(anchors) == 0) {
 606                 if (verbose) {
 607                         fprintf(stderr,
 608                                 "WARNING: no configured trust anchor\n");
 609                 }
 610                 x509_noanchor_init(&xwc, &xc.vtable);
 611                 br_ssl_engine_set_x509(&cc.eng, &xwc.vtable);
 612         } else {
 613                 br_ssl_engine_set_x509(&cc.eng, &xc.vtable);
 614         }
 615
 616         if (minhello_len != (size_t)-1) {
 617                 br_ssl_client_set_min_clienthello_len(&cc, minhello_len);
 618         }
 619
 620         br_ssl_engine_set_buffer(&cc.eng, iobuf, iobuf_len, bidi);
 621         br_ssl_client_reset(&cc, sni, 0);
 622
 623         /*
 624          * We need to avoid SIGPIPE.
 625          */
 626         signal(SIGPIPE, SIG_IGN);
 627
 628         /*
 629          * Connect to the peer.
 630          */
 631         fd = host_connect(host, port, verbose);
 632         if (fd < 0) {
 633                 goto client_exit_error;
 634         }
 635
 636         /*
 637          * Run the engine until completion.
 638          */
 639         if (run_ssl_engine(&cc.eng, fd,
 640                 (verbose ? RUN_ENGINE_VERBOSE : 0)
 641                 | (trace ? RUN_ENGINE_TRACE : 0)) != 0)
 642         {
 643                 goto client_exit_error;
 644         } else {
 645                 goto client_exit;
 646         }
 647
 648         /*
 649          * Release allocated structures.
 650          */
 651 client_exit:
 652         xfree(host);
 653         xfree(suites);
 654         xfree(suite_ids);
 655         VEC_CLEAREXT(anchors, &free_ta_contents);
 656         xfree(iobuf);
 657         if (fd >= 0) {
 658                 close(fd);
 659         }
 660         return retcode;
 661
 662 client_exit_error:
 663         retcode = -1;
 664         goto client_exit;
 665 }