tinc-vpn.org Git - tinc/blob - src/sptps_test.c

   1 /*
   2     sptps_test.c -- Simple Peer-to-Peer Security test program
   3     Copyright (C) 2011-2022 Guus Sliepen <guus@tinc-vpn.org>
   4
   5     This program is free software; you can redistribute it and/or modify
   6     it under the terms of the GNU General Public License as published by
   7     the Free Software Foundation; either version 2 of the License, or
   8     (at your option) any later version.
   9
  10     This program is distributed in the hope that it will be useful,
  11     but WITHOUT ANY WARRANTY; without even the implied warranty of
  12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13     GNU General Public License for more details.
  14
  15     You should have received a copy of the GNU General Public License along
  16     with this program; if not, write to the Free Software Foundation, Inc.,
  17     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18 */
  19
  20 #include "system.h"
  21
  22 #ifdef HAVE_LINUX
  23 #include <linux/if_tun.h>
  24 #endif
  25
  26 #include "crypto.h"
  27 #include "ecdsa.h"
  28 #include "meta.h"
  29 #include "protocol.h"
  30 #include "sptps.h"
  31 #include "utils.h"
  32 #include "names.h"
  33 #include "random.h"
  34
  35 #ifndef HAVE_WINDOWS
  36 #define closesocket(s) close(s)
  37 #endif
  38
  39 // Symbols necessary to link with logger.o
  40 bool send_request(struct connection_t *c, const char *msg, ...) {
  41         (void)c;
  42         (void)msg;
  43         return false;
  44 }
  45
  46 list_t connection_list;
  47
  48 bool send_meta(struct connection_t *c, const void *msg, size_t len) {
  49         (void)c;
  50         (void)msg;
  51         (void)len;
  52         return false;
  53 }
  54
  55 bool do_detach = false;
  56 struct timeval now;
  57
  58 static bool special;
  59 static bool verbose;
  60 static bool readonly;
  61 static bool writeonly;
  62 static int in = 0;
  63 static int out = 1;
  64 int addressfamily = AF_UNSPEC;
  65
  66 static bool send_data(void *handle, uint8_t type, const void *data, size_t len) {
  67         (void)type;
  68         char *hex = alloca(len * 2 + 1);
  69         bin2hex(data, hex, len);
  70
  71         if(verbose) {
  72                 fprintf(stderr, "Sending %lu bytes of data:\n%s\n", (unsigned long)len, hex);
  73         }
  74
  75         const int *sock = handle;
  76         const char *p = data;
  77
  78         while(len) {
  79                 ssize_t sent = send(*sock, p, len, 0);
  80
  81                 if(sent <= 0) {
  82                         fprintf(stderr, "Error sending data: %s\n", strerror(errno));
  83                         return false;
  84                 }
  85
  86                 p += sent;
  87                 len -= sent;
  88         }
  89
  90         return true;
  91 }
  92
  93 static bool receive_record(void *handle, uint8_t type, const void *data, uint16_t len) {
  94         (void)handle;
  95
  96         if(verbose) {
  97                 fprintf(stderr, "Received type %d record of %u bytes:\n", type, len);
  98         }
  99
 100         if(writeonly) {
 101                 return true;
 102         }
 103
 104         const char *p = data;
 105
 106         while(len) {
 107                 ssize_t written = write(out, p, len);
 108
 109                 if(written <= 0) {
 110                         fprintf(stderr, "Error writing received data: %s\n", strerror(errno));
 111                         return false;
 112                 }
 113
 114                 p += written;
 115                 len -= written;
 116         }
 117
 118         return true;
 119 }
 120
 121 typedef enum option_t {
 122         OPT_BAD_OPTION    = '?',
 123         OPT_LONG_OPTION   =  0,
 124
 125         // Short options
 126         OPT_DATAGRAM      = 'd',
 127         OPT_QUIT_ON_EOF   = 'q',
 128         OPT_READONLY      = 'r',
 129         OPT_WRITEONLY     = 'w',
 130         OPT_PACKET_LOSS   = 'L',
 131         OPT_REPLAY_WINDOW = 'W',
 132         OPT_SPECIAL_CHAR  = 's',
 133         OPT_TUN           = 't',
 134         OPT_VERBOSE       = 'v',
 135         OPT_IPV4          = '4',
 136         OPT_IPV6          = '6',
 137
 138         // Long options
 139         OPT_HELP          = 255,
 140 } option_t;
 141
 142 static struct option const long_options[] = {
 143         {"datagram",      no_argument,       NULL, OPT_DATAGRAM},
 144         {"quit",          no_argument,       NULL, OPT_QUIT_ON_EOF},
 145         {"readonly",      no_argument,       NULL, OPT_READONLY},
 146         {"writeonly",     no_argument,       NULL, OPT_WRITEONLY},
 147         {"packet-loss",   required_argument, NULL, OPT_PACKET_LOSS},
 148         {"replay-window", required_argument, NULL, OPT_REPLAY_WINDOW},
 149         {"special",       no_argument,       NULL, OPT_SPECIAL_CHAR},
 150         {"tun",           no_argument,       NULL, OPT_TUN},
 151         {"verbose",       required_argument, NULL, OPT_VERBOSE},
 152         {"help",          no_argument,       NULL, OPT_HELP},
 153         {NULL,            0,                 NULL, 0}
 154 };
 155
 156 static void usage(void) {
 157         fprintf(stderr,
 158                 "Usage: %s [options] my_ed25519_key_file his_ed25519_key_file [host] port\n"
 159                 "\n"
 160                 "Valid options are:\n"
 161                 "  -d, --datagram          Enable datagram mode.\n"
 162                 "  -q, --quit              Quit when EOF occurs on stdin.\n"
 163                 "  -r, --readonly          Only send data from the socket to stdout.\n"
 164 #ifdef HAVE_LINUX
 165                 "  -t, --tun               Use a tun device instead of stdio.\n"
 166 #endif
 167                 "  -w, --writeonly         Only send data from stdin to the socket.\n"
 168                 "  -L, --packet-loss RATE  Fake packet loss of RATE percent.\n"
 169                 "  -R, --replay-window N   Set replay window to N bytes.\n"
 170                 "  -s, --special           Enable special handling of lines starting with #, ^ and $.\n"
 171                 "  -v, --verbose           Display debug messages.\n"
 172                 "  -4                      Use IPv4.\n"
 173                 "  -6                      Use IPv6.\n"
 174                 "\n"
 175                 "Report bugs to tinc@tinc-vpn.org.\n",
 176                 program_name);
 177 }
 178
 179 #ifdef HAVE_WINDOWS
 180
 181 int stdin_sock_fd = -1;
 182
 183 // Windows does not allow calling select() on anything but sockets. Therefore,
 184 // to keep the same code as on other operating systems, we have to put a
 185 // separate thread between the stdin and the sptps loop way below. This thread
 186 // reads stdin and sends its content to the main thread through a TCP socket,
 187 // which can be properly select()'ed.
 188 static DWORD WINAPI stdin_reader_thread(LPVOID arg) {
 189         struct sockaddr_in sa;
 190         socklen_t sa_size = sizeof(sa);
 191
 192         while(true) {
 193                 int peer_fd = accept(stdin_sock_fd, (struct sockaddr *) &sa, &sa_size);
 194
 195                 if(peer_fd < 0) {
 196                         fprintf(stderr, "accept() failed: %s\n", strerror(errno));
 197                         continue;
 198                 }
 199
 200                 if(verbose) {
 201                         fprintf(stderr, "New connection received from :%d\n", ntohs(sa.sin_port));
 202                 }
 203
 204                 char buf[1024];
 205                 ssize_t nread;
 206
 207                 while((nread = read(STDIN_FILENO, buf, sizeof(buf))) > 0) {
 208                         if(verbose) {
 209                                 fprintf(stderr, "Read %lld bytes from input\n", nread);
 210                         }
 211
 212                         char *start = buf;
 213                         ssize_t nleft = nread;
 214
 215                         while(nleft) {
 216                                 ssize_t nsend = send(peer_fd, start, nleft, 0);
 217
 218                                 if(nsend < 0) {
 219                                         if(sockwouldblock(sockerrno)) {
 220                                                 continue;
 221                                         }
 222
 223                                         break;
 224                                 }
 225
 226                                 start += nsend;
 227                                 nleft -= nsend;
 228                         }
 229
 230                         if(nleft) {
 231                                 fprintf(stderr, "Could not send data: %s\n", strerror(errno));
 232                                 break;
 233                         }
 234
 235                         if(verbose) {
 236                                 fprintf(stderr, "Sent %lld bytes to peer\n", nread);
 237                         }
 238                 }
 239
 240                 closesocket(peer_fd);
 241         }
 242
 243         closesocket(stdin_sock_fd);
 244         stdin_sock_fd = -1;
 245         return 0;
 246 }
 247
 248 static int start_input_reader(void) {
 249         if(stdin_sock_fd != -1) {
 250                 fprintf(stderr, "stdin thread can only be started once.\n");
 251                 return -1;
 252         }
 253
 254         stdin_sock_fd = socket(AF_INET, SOCK_STREAM, 0);
 255
 256         if(stdin_sock_fd < 0) {
 257                 fprintf(stderr, "Could not create server socket: %s\n", strerror(errno));
 258                 return -1;
 259         }
 260
 261         struct sockaddr_in serv_sa;
 262
 263         memset(&serv_sa, 0, sizeof(serv_sa));
 264
 265         serv_sa.sin_family = AF_INET;
 266
 267         serv_sa.sin_addr.s_addr = htonl(0x7f000001); // 127.0.0.1
 268
 269         int res = bind(stdin_sock_fd, (struct sockaddr *)&serv_sa, sizeof(serv_sa));
 270
 271         if(res < 0) {
 272                 fprintf(stderr, "Could not bind socket: %s\n", strerror(errno));
 273                 goto server_err;
 274         }
 275
 276         if(listen(stdin_sock_fd, 1) < 0) {
 277                 fprintf(stderr, "Could not listen: %s\n", strerror(errno));
 278                 goto server_err;
 279         }
 280
 281         struct sockaddr_in connect_sa;
 282
 283         socklen_t addr_len = sizeof(connect_sa);
 284
 285         if(getsockname(stdin_sock_fd, (struct sockaddr *)&connect_sa, &addr_len) < 0) {
 286                 fprintf(stderr, "Could not determine the address of the stdin thread socket\n");
 287                 goto server_err;
 288         }
 289
 290         if(verbose) {
 291                 fprintf(stderr, "stdin thread is listening on :%d\n", ntohs(connect_sa.sin_port));
 292         }
 293
 294         if(!CreateThread(NULL, 0, stdin_reader_thread, NULL, 0, NULL)) {
 295                 fprintf(stderr, "Could not start reader thread: %d\n", GetLastError());
 296                 goto server_err;
 297         }
 298
 299         int client_fd = socket(AF_INET, SOCK_STREAM, 0);
 300
 301         if(client_fd < 0) {
 302                 fprintf(stderr, "Could not create client socket: %s\n", strerror(errno));
 303                 return -1;
 304         }
 305
 306         if(connect(client_fd, (struct sockaddr *)&connect_sa, sizeof(connect_sa)) < 0) {
 307                 fprintf(stderr, "Could not connect: %s\n", strerror(errno));
 308                 closesocket(client_fd);
 309                 return -1;
 310         }
 311
 312         return client_fd;
 313
 314 server_err:
 315
 316         if(stdin_sock_fd != -1) {
 317                 closesocket(stdin_sock_fd);
 318                 stdin_sock_fd = -1;
 319         }
 320
 321         return -1;
 322 }
 323
 324 #endif // HAVE_WINDOWS
 325
 326 static void print_listening_msg(int sock) {
 327         sockaddr_t sa = {0};
 328         socklen_t salen = sizeof(sa);
 329         int port = 0;
 330
 331         if(!getsockname(sock, &sa.sa, &salen)) {
 332                 port = ntohs(sa.in.sin_port);
 333         }
 334
 335         fprintf(stderr, "Listening on %d...\n", port);
 336         fflush(stderr);
 337 }
 338
 339 static int run_test(int argc, char *argv[]) {
 340         program_name = argv[0];
 341         bool initiator = false;
 342         bool datagram = false;
 343 #ifdef HAVE_LINUX
 344         bool tun = false;
 345 #endif
 346         int packetloss = 0;
 347         int r;
 348         int option_index = 0;
 349         bool quit = false;
 350
 351         while((r = getopt_long(argc, argv, "dqrstwL:W:v46", long_options, &option_index)) != EOF) {
 352                 switch((option_t) r) {
 353                 case OPT_LONG_OPTION:
 354                         break;
 355
 356                 case OPT_BAD_OPTION:
 357                         usage();
 358                         return 1;
 359
 360                 case OPT_DATAGRAM:
 361                         datagram = true;
 362                         break;
 363
 364                 case OPT_QUIT_ON_EOF:
 365                         quit = true;
 366                         break;
 367
 368                 case OPT_READONLY:
 369                         readonly = true;
 370                         break;
 371
 372                 case OPT_TUN:
 373 #ifdef HAVE_LINUX
 374                         tun = true;
 375 #else
 376                         fprintf(stderr, "--tun is only supported on Linux.\n");
 377                         usage();
 378                         return 1;
 379 #endif
 380                         break;
 381
 382                 case OPT_WRITEONLY:
 383                         writeonly = true;
 384                         break;
 385
 386                 case OPT_PACKET_LOSS:
 387                         packetloss = atoi(optarg);
 388                         break;
 389
 390                 case OPT_REPLAY_WINDOW:
 391                         sptps_replaywin = atoi(optarg);
 392                         break;
 393
 394                 case OPT_VERBOSE:
 395                         verbose = true;
 396                         break;
 397
 398                 case OPT_SPECIAL_CHAR:
 399                         special = true;
 400                         break;
 401
 402                 case OPT_IPV4:
 403                         addressfamily = AF_INET;
 404                         break;
 405
 406                 case OPT_IPV6:
 407                         addressfamily = AF_INET6;
 408                         break;
 409
 410                 case OPT_HELP:
 411                         usage();
 412                         return 0;
 413
 414                 default:
 415                         break;
 416                 }
 417         }
 418
 419         argc -= optind - 1;
 420         argv += optind - 1;
 421
 422         if(argc < 4 || argc > 5) {
 423                 fprintf(stderr, "Wrong number of arguments.\n");
 424                 usage();
 425                 return 1;
 426         }
 427
 428         if(argc > 4) {
 429                 initiator = true;
 430         }
 431
 432 #ifdef HAVE_LINUX
 433
 434         if(tun) {
 435                 in = out = open("/dev/net/tun", O_RDWR | O_NONBLOCK);
 436
 437                 if(in < 0) {
 438                         fprintf(stderr, "Could not open tun device: %s\n", strerror(errno));
 439                         return 1;
 440                 }
 441
 442                 struct ifreq ifr = {
 443                         .ifr_flags = IFF_TUN
 444                 };
 445
 446                 if(ioctl(in, TUNSETIFF, &ifr)) {
 447                         fprintf(stderr, "Could not configure tun interface: %s\n", strerror(errno));
 448                         return 1;
 449                 }
 450
 451                 ifr.ifr_name[IFNAMSIZ - 1] = 0;
 452                 fprintf(stderr, "Using tun interface %s\n", ifr.ifr_name);
 453         }
 454
 455 #endif
 456
 457 #ifdef HAVE_WINDOWS
 458         static struct WSAData wsa_state;
 459
 460         if(WSAStartup(MAKEWORD(2, 2), &wsa_state)) {
 461                 return 1;
 462         }
 463
 464 #endif
 465
 466         struct addrinfo *ai, hint;
 467         memset(&hint, 0, sizeof(hint));
 468
 469         hint.ai_family = addressfamily;
 470         hint.ai_socktype = datagram ? SOCK_DGRAM : SOCK_STREAM;
 471         hint.ai_protocol = datagram ? IPPROTO_UDP : IPPROTO_TCP;
 472         hint.ai_flags = initiator ? 0 : AI_PASSIVE;
 473
 474         if(getaddrinfo(initiator ? argv[3] : NULL, initiator ? argv[4] : argv[3], &hint, &ai) || !ai) {
 475                 fprintf(stderr, "getaddrinfo() failed: %s\n", sockstrerror(sockerrno));
 476                 return 1;
 477         }
 478
 479         int sock = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
 480
 481         if(sock < 0) {
 482                 fprintf(stderr, "Could not create socket: %s\n", sockstrerror(sockerrno));
 483                 freeaddrinfo(ai);
 484                 return 1;
 485         }
 486
 487         int one = 1;
 488         setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (void *)&one, sizeof(one));
 489
 490         if(initiator) {
 491                 int res = connect(sock, ai->ai_addr, ai->ai_addrlen);
 492
 493                 freeaddrinfo(ai);
 494                 ai = NULL;
 495
 496                 if(res) {
 497                         fprintf(stderr, "Could not connect to peer: %s\n", sockstrerror(sockerrno));
 498                         return 1;
 499                 }
 500
 501                 fprintf(stderr, "Connected\n");
 502         } else {
 503                 int res = bind(sock, ai->ai_addr, ai->ai_addrlen);
 504
 505                 freeaddrinfo(ai);
 506                 ai = NULL;
 507
 508                 if(res) {
 509                         fprintf(stderr, "Could not bind socket: %s\n", sockstrerror(sockerrno));
 510                         return 1;
 511                 }
 512
 513                 if(!datagram) {
 514                         if(listen(sock, 1)) {
 515                                 fprintf(stderr, "Could not listen on socket: %s\n", sockstrerror(sockerrno));
 516                                 return 1;
 517                         }
 518
 519                         print_listening_msg(sock);
 520
 521                         sock = accept(sock, NULL, NULL);
 522
 523                         if(sock < 0) {
 524                                 fprintf(stderr, "Could not accept connection: %s\n", sockstrerror(sockerrno));
 525                                 return 1;
 526                         }
 527                 } else {
 528                         print_listening_msg(sock);
 529
 530                         char buf[65536];
 531                         struct sockaddr addr;
 532                         socklen_t addrlen = sizeof(addr);
 533
 534                         if(recvfrom(sock, buf, sizeof(buf), MSG_PEEK, &addr, &addrlen) <= 0) {
 535                                 fprintf(stderr, "Could not read from socket: %s\n", sockstrerror(sockerrno));
 536                                 return 1;
 537                         }
 538
 539                         if(connect(sock, &addr, addrlen)) {
 540                                 fprintf(stderr, "Could not accept connection: %s\n", sockstrerror(sockerrno));
 541                                 return 1;
 542                         }
 543                 }
 544
 545                 fprintf(stderr, "Connected\n");
 546         }
 547
 548         FILE *fp = fopen(argv[1], "r");
 549
 550         if(!fp) {
 551                 fprintf(stderr, "Could not open %s: %s\n", argv[1], strerror(errno));
 552                 return 1;
 553         }
 554
 555         ecdsa_t *mykey = NULL;
 556
 557         if(!(mykey = ecdsa_read_pem_private_key(fp))) {
 558                 return 1;
 559         }
 560
 561         fclose(fp);
 562
 563         fp = fopen(argv[2], "r");
 564
 565         if(!fp) {
 566                 fprintf(stderr, "Could not open %s: %s\n", argv[2], strerror(errno));
 567                 ecdsa_free(mykey);
 568                 return 1;
 569         }
 570
 571         ecdsa_t *hiskey = NULL;
 572
 573         if(!(hiskey = ecdsa_read_pem_public_key(fp))) {
 574                 ecdsa_free(mykey);
 575                 return 1;
 576         }
 577
 578         fclose(fp);
 579
 580         if(verbose) {
 581                 fprintf(stderr, "Keys loaded\n");
 582         }
 583
 584         sptps_t s;
 585
 586         if(!sptps_start(&s, &sock, initiator, datagram, mykey, hiskey, "sptps_test", 10, send_data, receive_record)) {
 587                 ecdsa_free(mykey);
 588                 ecdsa_free(hiskey);
 589                 return 1;
 590         }
 591
 592 #ifdef HAVE_WINDOWS
 593
 594         if(!readonly) {
 595                 in = start_input_reader();
 596
 597                 if(in < 0) {
 598                         fprintf(stderr, "Could not init stdin reader thread\n");
 599                         ecdsa_free(mykey);
 600                         ecdsa_free(hiskey);
 601                         return 1;
 602                 }
 603         }
 604
 605 #endif
 606
 607         int max_fd = MAX(sock, in);
 608
 609         while(true) {
 610                 if(writeonly && readonly) {
 611                         break;
 612                 }
 613
 614                 char buf[65535] = "";
 615                 size_t readsize = datagram ? 1460u : sizeof(buf);
 616
 617                 fd_set fds;
 618                 FD_ZERO(&fds);
 619
 620                 if(!readonly && s.instate) {
 621                         FD_SET(in, &fds);
 622                 }
 623
 624                 FD_SET(sock, &fds);
 625
 626                 if(select(max_fd + 1, &fds, NULL, NULL, NULL) <= 0) {
 627                         ecdsa_free(mykey);
 628                         ecdsa_free(hiskey);
 629                         return 1;
 630                 }
 631
 632                 if(FD_ISSET(in, &fds)) {
 633 #ifdef HAVE_WINDOWS
 634                         ssize_t len = recv(in, buf, readsize, 0);
 635 #else
 636                         ssize_t len = read(in, buf, readsize);
 637 #endif
 638
 639                         if(len < 0) {
 640                                 fprintf(stderr, "Could not read from stdin: %s\n", strerror(errno));
 641                                 ecdsa_free(mykey);
 642                                 ecdsa_free(hiskey);
 643                                 return 1;
 644                         }
 645
 646                         if(len == 0) {
 647 #ifdef HAVE_WINDOWS
 648                                 shutdown(in, SD_SEND);
 649                                 closesocket(in);
 650 #endif
 651
 652                                 if(quit) {
 653                                         break;
 654                                 }
 655
 656                                 readonly = true;
 657                                 continue;
 658                         }
 659
 660                         if(special && buf[0] == '#') {
 661                                 s.outseqno = atoi(buf + 1);
 662                         }
 663
 664                         if(special && buf[0] == '^') {
 665                                 sptps_send_record(&s, SPTPS_HANDSHAKE, NULL, 0);
 666                         } else if(special && buf[0] == '$') {
 667                                 sptps_force_kex(&s);
 668
 669                                 if(len > 1) {
 670                                         sptps_send_record(&s, 0, buf, len);
 671                                 }
 672                         } else if(!sptps_send_record(&s, buf[0] == '!' ? 1 : 0, buf, (len == 1 && buf[0] == '\n') ? 0 : buf[0] == '*' ? sizeof(buf) : (size_t)len)) {
 673                                 ecdsa_free(mykey);
 674                                 ecdsa_free(hiskey);
 675                                 return 1;
 676                         }
 677                 }
 678
 679                 if(FD_ISSET(sock, &fds)) {
 680                         ssize_t len = recv(sock, buf, sizeof(buf), 0);
 681
 682                         if(len < 0) {
 683                                 fprintf(stderr, "Could not read from socket: %s\n", sockstrerror(sockerrno));
 684                                 ecdsa_free(mykey);
 685                                 ecdsa_free(hiskey);
 686                                 return 1;
 687                         }
 688
 689                         if(len == 0) {
 690                                 fprintf(stderr, "Connection terminated by peer.\n");
 691                                 break;
 692                         }
 693
 694                         if(verbose) {
 695                                 char *hex = alloca(len * 2 + 1);
 696                                 bin2hex(buf, hex, len);
 697                                 fprintf(stderr, "Received %ld bytes of data:\n%s\n", (long)len, hex);
 698                         }
 699
 700                         if(packetloss && (int)prng(100) < packetloss) {
 701                                 if(verbose) {
 702                                         fprintf(stderr, "Dropped.\n");
 703                                 }
 704
 705                                 continue;
 706                         }
 707
 708                         char *bufp = buf;
 709
 710                         while(len) {
 711                                 size_t done = sptps_receive_data(&s, bufp, len);
 712
 713                                 if(!done) {
 714                                         if(!datagram) {
 715                                                 ecdsa_free(mykey);
 716                                                 ecdsa_free(hiskey);
 717                                                 return 1;
 718                                         }
 719                                 }
 720
 721                                 bufp += done;
 722                                 len -= (ssize_t) done;
 723                         }
 724                 }
 725         }
 726
 727         bool stopped = sptps_stop(&s);
 728
 729         ecdsa_free(mykey);
 730         ecdsa_free(hiskey);
 731         closesocket(sock);
 732
 733         return !stopped;
 734 }
 735
 736 int main(int argc, char *argv[]) {
 737         random_init();
 738         crypto_init();
 739         prng_init();
 740
 741         int result = run_test(argc, argv);
 742
 743         random_exit();
 744
 745         return result;
 746 }