tests/mini-dtls-record.c

   1 /*
   2  * Copyright (C) 2012-2013 Free Software Foundation, Inc.
   3  * Copyright (C) 2013 Nikos Mavrogiannopoulos
   4  *
   5  * Author: Nikos Mavrogiannopoulos
   6  *
   7  * This file is part of GnuTLS.
   8  *
   9  * GnuTLS is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 3 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * GnuTLS is distributed in the hope that it will be useful, but
  15  * WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with GnuTLS; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdio.h>
  29 #include <stdlib.h>
  30
  31 #if defined(_WIN32)
  32
  33 int main()
  34 {
  35         exit(77);
  36 }
  37
  38 #else
  39
  40 #include <string.h>
  41 #include <errno.h>
  42 #include <sys/types.h>
  43 #include <netinet/in.h>
  44 #include <sys/socket.h>
  45 #include <sys/wait.h>
  46 #include <arpa/inet.h>
  47 #include <unistd.h>
  48 #include <gnutls/gnutls.h>
  49 #include <gnutls/dtls.h>
  50
  51 #include "utils.h"
  52
  53 static int test_finished = 0;
  54 static void terminate(void);
  55
  56 /* This program tests whether messages in DTLS are received
  57  * with the expected sequence. That is whether the message
  58  * sequence numbers returned correspond to the received messages.
  59  */
  60
  61 /*
  62 static void
  63 tls_audit_log_func (gnutls_session_t session, const char *str)
  64 {
  65   fprintf (stderr, "|<%p>| %s", session, str);
  66 }
  67 */
  68
  69 static void server_log_func(int level, const char *str)
  70 {
  71         fprintf(stderr, "server|<%d>| %s", level, str);
  72 }
  73
  74 static void client_log_func(int level, const char *str)
  75 {
  76         fprintf(stderr, "client|<%d>| %s", level, str);
  77 }
  78
  79 /* These are global */
  80 static pid_t child;
  81
  82 /* A test client/server app for DTLS duplicate packet detection.
  83  */
  84
  85 #define MAX_BUF 1024
  86
  87 #define MAX_SEQ 128
  88
  89 static int msg_seq[] =
  90     { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 16, 5, 32, 11, 11, 11, 11, 12,
  91         10, 13, 14, 15, 16, 17, 19, 20, 18, 22, 24, 23, 25, 26, 27, 29, 28,
  92         29, 29, 30, 31, 32, 33, 34, 35, 37, 36, 38, 39, 42, 37, 40, 41, 41,
  93         -1
  94 };
  95
  96 static unsigned int current = 0;
  97 static unsigned int pos = 0;
  98
  99 unsigned char *stored_messages[MAX_SEQ];
 100 unsigned int stored_sizes[MAX_SEQ];
 101
 102 static ssize_t odd_push(gnutls_transport_ptr_t tr, const void *data, size_t len)
 103 {
 104         ssize_t ret;
 105         unsigned i;
 106
 107         if (msg_seq[current] == -1 || test_finished != 0) {
 108                 test_finished = 1;
 109                 return len;
 110         }
 111
 112         stored_messages[current] = malloc(len);
 113         memcpy(stored_messages[current], data, len);
 114         stored_sizes[current] = len;
 115
 116         if (pos != current) {
 117                 for (i = pos; i <= current; i++) {
 118                         if (stored_messages[msg_seq[i]] != NULL) {
 119                                 do {
 120
 121                                         ret =
 122                                             send((long int)tr,
 123                                                  stored_messages[msg_seq
 124                                                                  [i]],
 125                                                  stored_sizes[msg_seq[i]], 0);
 126                                 }
 127                                 while (ret == -1 && errno == EAGAIN);
 128                                 pos++;
 129                         } else
 130                                 break;
 131                 }
 132         } else if (msg_seq[current] == (int)current) {
 133                 do {
 134                         ret = send((long int)tr, data, len, 0);
 135                 }
 136                 while (ret == -1 && errno == EAGAIN);
 137
 138                 current++;
 139                 pos++;
 140
 141                 return ret;
 142         } else if (stored_messages[msg_seq[current]] != NULL) {
 143                 do {
 144                         ret =
 145                             send((long int)tr,
 146                                  stored_messages[msg_seq[current]],
 147                                  stored_sizes[msg_seq[current]], 0);
 148                 }
 149                 while (ret == -1 && errno == EAGAIN);
 150                 current++;
 151                 pos++;
 152                 return ret;
 153         }
 154
 155         current++;
 156
 157         return len;
 158 }
 159
 160 static ssize_t n_push(gnutls_transport_ptr_t tr, const void *data, size_t len)
 161 {
 162         return send((unsigned long)tr, data, len, 0);
 163 }
 164
 165 /* The first five messages are handshake. Thus corresponds to msg_seq+5 */
 166 static int recv_msg_seq[] =
 167     { 1, 2, 3, 4, 5, 6, 12, 28, 7, 8, 9, 10, 11, 13, 15, 16, 14, 18, 20,
 168         19, 21, 22, 23, 25, 24, 26, 27, 29, 30, 31, 33, 32, 34, 35, 38, 36, 37,
 169             -1
 170 };
 171
 172 static void client(int fd)
 173 {
 174         gnutls_session_t session;
 175         int ret;
 176         char buffer[MAX_BUF + 1];
 177         gnutls_anon_client_credentials_t anoncred;
 178         unsigned char seq[8];
 179         uint64_t useq;
 180         unsigned current = 0;
 181
 182         memset(buffer, 0, sizeof(buffer));
 183
 184         /* Need to enable anonymous KX specifically. */
 185
 186 /*    gnutls_global_set_audit_log_function (tls_audit_log_func); */
 187         global_init();
 188
 189         if (debug) {
 190                 gnutls_global_set_log_function(client_log_func);
 191                 gnutls_global_set_log_level(2);
 192         }
 193
 194         gnutls_anon_allocate_client_credentials(&anoncred);
 195
 196         /* Initialize TLS session
 197          */
 198         gnutls_init(&session, GNUTLS_CLIENT | GNUTLS_DATAGRAM);
 199         gnutls_heartbeat_enable(session, GNUTLS_HB_PEER_ALLOWED_TO_SEND);
 200         gnutls_dtls_set_mtu(session, 1500);
 201
 202         /* Use default priorities */
 203         gnutls_priority_set_direct(session,
 204                                    "NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
 205                                    NULL);
 206
 207         /* put the anonymous credentials to the current session
 208          */
 209         gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
 210
 211         gnutls_transport_set_int(session, fd);
 212
 213         /* Perform the TLS handshake
 214          */
 215         do {
 216                 ret = gnutls_handshake(session);
 217         }
 218         while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
 219
 220         if (ret < 0) {
 221                 fail("client: Handshake failed\n");
 222                 gnutls_perror(ret);
 223                 exit(1);
 224         } else {
 225                 if (debug)
 226                         success("client: Handshake was completed\n");
 227         }
 228
 229         gnutls_record_send(session, buffer, 1);
 230
 231         if (debug)
 232                 success("client: DTLS version is: %s\n",
 233                         gnutls_protocol_get_name
 234                         (gnutls_protocol_get_version(session)));
 235         do {
 236                 ret =
 237                     gnutls_record_recv_seq(session, buffer, sizeof(buffer),
 238                                            seq);
 239
 240                 if (ret > 0) {
 241                         useq =
 242                             seq[3] | (seq[2] << 8) | (seq[1] << 16) |
 243                             (seq[0] << 24);
 244                         useq <<= 32;
 245                         useq |=
 246                             seq[7] | (seq[6] << 8) | (seq[5] << 16) |
 247                             (seq[4] << 24);
 248
 249                         if (recv_msg_seq[current] == -1) {
 250                                 fail("received message sequence differs\n");
 251                                 terminate();
 252                         }
 253
 254                         if ((uint32_t) recv_msg_seq[current] != (uint32_t) useq) {
 255                                 fail("received message sequence differs (got: %u, expected: %u)\n", (unsigned)useq, (unsigned)recv_msg_seq[current]);
 256                                 terminate();
 257                         }
 258
 259                         current++;
 260                 }
 261         }
 262         while ((ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED
 263                 || ret > 0));
 264
 265         gnutls_bye(session, GNUTLS_SHUT_WR);
 266
 267         close(fd);
 268
 269         gnutls_deinit(session);
 270
 271         gnutls_anon_free_client_credentials(anoncred);
 272
 273         gnutls_global_deinit();
 274 }
 275
 276 static void terminate(void)
 277 {
 278         int status;
 279
 280         kill(child, SIGTERM);
 281         wait(&status);
 282         exit(1);
 283 }
 284
 285 static void server(int fd)
 286 {
 287         int ret;
 288         gnutls_session_t session;
 289         gnutls_anon_server_credentials_t anoncred;
 290         char c;
 291
 292         global_init();
 293
 294         if (debug) {
 295                 gnutls_global_set_log_function(server_log_func);
 296                 gnutls_global_set_log_level(2);
 297         }
 298
 299         gnutls_anon_allocate_server_credentials(&anoncred);
 300
 301         gnutls_init(&session, GNUTLS_SERVER | GNUTLS_DATAGRAM);
 302         gnutls_transport_set_push_function(session, odd_push);
 303         gnutls_heartbeat_enable(session, GNUTLS_HB_PEER_ALLOWED_TO_SEND);
 304         gnutls_dtls_set_mtu(session, 1500);
 305
 306         /* avoid calling all the priority functions, since the defaults
 307          * are adequate.
 308          */
 309         gnutls_priority_set_direct(session,
 310                                    "NONE:+VERS-DTLS1.0:+CIPHER-ALL:+MAC-ALL:+SIGN-ALL:+COMP-ALL:+ANON-ECDH:+CURVE-ALL",
 311                                    NULL);
 312         gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
 313
 314         gnutls_transport_set_int(session, fd);
 315
 316         do {
 317                 ret = gnutls_handshake(session);
 318         }
 319         while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
 320         if (ret < 0) {
 321                 close(fd);
 322                 gnutls_deinit(session);
 323                 fail("server: Handshake has failed (%s)\n\n",
 324                      gnutls_strerror(ret));
 325                 terminate();
 326         }
 327         if (debug)
 328                 success("server: Handshake was completed\n");
 329
 330         if (debug)
 331                 success("server: TLS version is: %s\n",
 332                         gnutls_protocol_get_name
 333                         (gnutls_protocol_get_version(session)));
 334
 335         gnutls_record_recv(session, &c, 1);
 336         do {
 337                 do {
 338                         ret = gnutls_record_send(session, &c, 1);
 339                 }
 340                 while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
 341
 342                 if (ret < 0) {
 343                         fail("send: %s\n", gnutls_strerror(ret));
 344                         terminate();
 345                 }
 346         }
 347         while (test_finished == 0);
 348
 349         gnutls_transport_set_push_function(session, n_push);
 350         do {
 351                 ret = gnutls_bye(session, GNUTLS_SHUT_WR);
 352         }
 353         while (ret == GNUTLS_E_AGAIN || ret == GNUTLS_E_INTERRUPTED);
 354
 355         close(fd);
 356         gnutls_deinit(session);
 357
 358         gnutls_anon_free_server_credentials(anoncred);
 359
 360         gnutls_global_deinit();
 361
 362         if (debug)
 363                 success("server: finished\n");
 364 }
 365
 366 static void start(void)
 367 {
 368         int fd[2];
 369         int ret;
 370
 371         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
 372         if (ret < 0) {
 373                 perror("socketpair");
 374                 exit(1);
 375         }
 376
 377         child = fork();
 378         if (child < 0) {
 379                 perror("fork");
 380                 fail("fork");
 381                 exit(1);
 382         }
 383
 384         if (child) {
 385                 int status;
 386                 /* parent */
 387                 close(fd[1]);
 388                 server(fd[0]);
 389                 wait(&status);
 390                 if (WEXITSTATUS(status) != 0)
 391                         fail("Child died with status %d\n",
 392                              WEXITSTATUS(status));
 393         } else {
 394                 close(fd[0]);
 395                 client(fd[1]);
 396                 exit(0);
 397         }
 398 }
 399
 400 void doit(void)
 401 {
 402         start();
 403 }
 404
 405 #endif                          /* _WIN32 */