tests/mini-tls-nonblock.c

   1 /*
   2  * Copyright (C) 2015 Red Hat, Inc.
   3  *
   4  * Author: Nikos Mavrogiannopoulos
   5  *
   6  * This file is part of GnuTLS.
   7  *
   8  * GnuTLS is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 3 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * GnuTLS is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with GnuTLS; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29
  30 #if defined(_WIN32)
  31
  32 int main()
  33 {
  34         exit(77);
  35 }
  36
  37 #else
  38
  39 #include <string.h>
  40 #include <sys/types.h>
  41 #include <netinet/in.h>
  42 #include <sys/socket.h>
  43 #include <sys/wait.h>
  44 #include <arpa/inet.h>
  45 #include <unistd.h>
  46 #include <fcntl.h>
  47 #include <gnutls/gnutls.h>
  48 #include <gnutls/dtls.h>
  49 #include <signal.h>
  50
  51 #include "utils.h"
  52
  53 static void terminate(void);
  54
  55 /* This program tests whether our pull timeout function is called
  56  * during handshake.
  57  */
  58
  59 static void server_log_func(int level, const char *str)
  60 {
  61 //  fprintf (stderr, "server|<%d>| %s", level, str);
  62 }
  63
  64 static void client_log_func(int level, const char *str)
  65 {
  66         fprintf(stderr, "client|<%d>| %s", level, str);
  67 }
  68
  69 static unsigned char server_cert_pem[] =
  70     "-----BEGIN CERTIFICATE-----\n"
  71     "MIICVjCCAcGgAwIBAgIERiYdMTALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"
  72     "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTIxWhcNMDgwNDE3MTMyOTIxWjA3MRsw\n"
  73     "GQYDVQQKExJHbnVUTFMgdGVzdCBzZXJ2ZXIxGDAWBgNVBAMTD3Rlc3QuZ251dGxz\n"
  74     "Lm9yZzCBnDALBgkqhkiG9w0BAQEDgYwAMIGIAoGA17pcr6MM8C6pJ1aqU46o63+B\n"
  75     "dUxrmL5K6rce+EvDasTaDQC46kwTHzYWk95y78akXrJutsoKiFV1kJbtple8DDt2\n"
  76     "DZcevensf9Op7PuFZKBroEjOd35znDET/z3IrqVgbtm2jFqab7a+n2q9p/CgMyf1\n"
  77     "tx2S5Zacc1LWn9bIjrECAwEAAaOBkzCBkDAMBgNVHRMBAf8EAjAAMBoGA1UdEQQT\n"
  78     "MBGCD3Rlc3QuZ251dGxzLm9yZzATBgNVHSUEDDAKBggrBgEFBQcDATAPBgNVHQ8B\n"
  79     "Af8EBQMDB6AAMB0GA1UdDgQWBBTrx0Vu5fglyoyNgw106YbU3VW0dTAfBgNVHSME\n"
  80     "GDAWgBTpPBz7rZJu5gakViyi4cBTJ8jylTALBgkqhkiG9w0BAQUDgYEAaFEPTt+7\n"
  81     "bzvBuOf7+QmeQcn29kT6Bsyh1RHJXf8KTk5QRfwp6ogbp94JQWcNQ/S7YDFHglD1\n"
  82     "AwUNBRXwd3riUsMnsxgeSDxYBfJYbDLeohNBsqaPDJb7XailWbMQKfAbFQ8cnOxg\n"
  83     "rOKLUQRWJ0K3HyXRMhbqjdLIaQiCvQLuizo=\n" "-----END CERTIFICATE-----\n";
  84
  85 const gnutls_datum_t server_cert = { server_cert_pem,
  86         sizeof(server_cert_pem)
  87 };
  88
  89 static unsigned char server_key_pem[] =
  90     "-----BEGIN RSA PRIVATE KEY-----\n"
  91     "MIICXAIBAAKBgQDXulyvowzwLqknVqpTjqjrf4F1TGuYvkrqtx74S8NqxNoNALjq\n"
  92     "TBMfNhaT3nLvxqResm62ygqIVXWQlu2mV7wMO3YNlx696ex/06ns+4VkoGugSM53\n"
  93     "fnOcMRP/PciupWBu2baMWppvtr6far2n8KAzJ/W3HZLllpxzUtaf1siOsQIDAQAB\n"
  94     "AoGAYAFyKkAYC/PYF8e7+X+tsVCHXppp8AoP8TEZuUqOZz/AArVlle/ROrypg5kl\n"
  95     "8YunrvUdzH9R/KZ7saNZlAPLjZyFG9beL/am6Ai7q7Ma5HMqjGU8kTEGwD7K+lbG\n"
  96     "iomokKMOl+kkbY/2sI5Czmbm+/PqLXOjtVc5RAsdbgvtmvkCQQDdV5QuU8jap8Hs\n"
  97     "Eodv/tLJ2z4+SKCV2k/7FXSKWe0vlrq0cl2qZfoTUYRnKRBcWxc9o92DxK44wgPi\n"
  98     "oMQS+O7fAkEA+YG+K9e60sj1K4NYbMPAbYILbZxORDecvP8lcphvwkOVUqbmxOGh\n"
  99     "XRmTZUuhBrJhJKKf6u7gf3KWlPl6ShKEbwJASC118cF6nurTjuLf7YKARDjNTEws\n"
 100     "qZEeQbdWYINAmCMj0RH2P0mvybrsXSOD5UoDAyO7aWuqkHGcCLv6FGG+qwJAOVqq\n"
 101     "tXdUucl6GjOKKw5geIvRRrQMhb/m5scb+5iw8A4LEEHPgGiBaF5NtJZLALgWfo5n\n"
 102     "hmC8+G8F0F78znQtPwJBANexu+Tg5KfOnzSILJMo3oXiXhf5PqXIDmbN0BKyCKAQ\n"
 103     "LfkcEcUbVfmDaHpvzwY9VEaoMOKVLitETXdNSxVpvWM=\n"
 104     "-----END RSA PRIVATE KEY-----\n";
 105
 106 const gnutls_datum_t server_key = { server_key_pem,
 107         sizeof(server_key_pem)
 108 };
 109
 110
 111 /* A very basic TLS client, with anonymous authentication.
 112  */
 113
 114 #define MAX_BUF 1024
 115 static const char *g_msg = "";
 116
 117 static ssize_t
 118 my_pull(gnutls_transport_ptr_t tr, void *data, size_t len)
 119 {
 120         return recv((long)tr, data, len, 0);
 121 }
 122
 123 static ssize_t
 124 my_push(gnutls_transport_ptr_t tr, const void *data, size_t len)
 125 {
 126         return send((long)tr, data, len, 0);
 127 }
 128
 129 static int
 130 my_pull_timeout(gnutls_transport_ptr_t tr, unsigned ms)
 131 {
 132         if (ms != 0) {
 133                 fail("pull timeout was called: %s!\n", g_msg);
 134                 exit(1);
 135         }
 136         return 1;
 137 }
 138
 139 static void client(int fd, const char *msg, unsigned expl)
 140 {
 141         int ret;
 142         gnutls_anon_client_credentials_t anoncred;
 143         gnutls_certificate_credentials_t x509_cred;
 144         gnutls_session_t session;
 145         /* Need to enable anonymous KX specifically. */
 146
 147         global_init();
 148         g_msg = msg;
 149
 150         if (debug) {
 151                 gnutls_global_set_log_function(client_log_func);
 152                 gnutls_global_set_log_level(7);
 153         }
 154
 155         /* set socket to non-blocking */
 156         ret = fcntl(fd, F_GETFL, 0);
 157         fcntl(fd, F_SETFL, ret | O_NONBLOCK);
 158
 159         gnutls_anon_allocate_client_credentials(&anoncred);
 160         gnutls_certificate_allocate_credentials(&x509_cred);
 161
 162         /* Initialize TLS session
 163          */
 164         gnutls_init(&session, GNUTLS_CLIENT|expl);
 165
 166         /* Use default priorities */
 167         ret = gnutls_priority_set_direct(session, "NORMAL", NULL);
 168         if (ret < 0) {
 169                 fail("error in setting priority\n");
 170                 exit(1);
 171         }
 172
 173         /* put the anonymous credentials to the current session
 174          */
 175         gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
 176         gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
 177
 178         gnutls_transport_set_int(session, fd);
 179         gnutls_transport_set_push_function(session, my_push);
 180         gnutls_transport_set_pull_function(session, my_pull);
 181         gnutls_transport_set_pull_timeout_function(session, my_pull_timeout);
 182
 183         /* Perform the TLS handshake
 184          */
 185         do {
 186                 ret = gnutls_handshake(session);
 187         }
 188         while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
 189
 190         if (ret < 0) {
 191                 fail("client: Handshake failed\n");
 192                 gnutls_perror(ret);
 193                 exit(1);
 194         } else {
 195                 if (debug)
 196                         success("client: Handshake was completed\n");
 197         }
 198
 199         if (debug)
 200                 success("client: TLS version is: %s\n",
 201                         gnutls_protocol_get_name
 202                         (gnutls_protocol_get_version(session)));
 203
 204         close(fd);
 205
 206         gnutls_deinit(session);
 207
 208         gnutls_anon_free_client_credentials(anoncred);
 209         gnutls_certificate_free_credentials(x509_cred);
 210
 211         gnutls_global_deinit();
 212 }
 213
 214
 215 /* These are global */
 216 pid_t child;
 217
 218
 219 static void terminate(void)
 220 {
 221         kill(child, SIGTERM);
 222         exit(1);
 223 }
 224
 225 static void server(int fd, unsigned expl)
 226 {
 227         int ret;
 228         char buffer[MAX_BUF + 1];
 229         gnutls_session_t session;
 230         gnutls_anon_server_credentials_t anoncred;
 231         gnutls_certificate_credentials_t x509_cred;
 232
 233         /* this must be called once in the program
 234          */
 235         global_init();
 236         memset(buffer, 0, sizeof(buffer));
 237
 238         if (debug) {
 239                 gnutls_global_set_log_function(server_log_func);
 240                 gnutls_global_set_log_level(4711);
 241         }
 242
 243         gnutls_certificate_allocate_credentials(&x509_cred);
 244         gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,
 245                                             &server_key,
 246                                             GNUTLS_X509_FMT_PEM);
 247
 248         gnutls_anon_allocate_server_credentials(&anoncred);
 249
 250         if (expl & GNUTLS_DATAGRAM)
 251                 gnutls_init(&session, GNUTLS_SERVER|GNUTLS_DATAGRAM);
 252         else
 253                 gnutls_init(&session, GNUTLS_SERVER);
 254
 255         /* avoid calling all the priority functions, since the defaults
 256          * are adequate.
 257          */
 258         gnutls_priority_set_direct(session, "NORMAL", NULL);
 259
 260         gnutls_credentials_set(session, GNUTLS_CRD_ANON, anoncred);
 261         gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
 262
 263         gnutls_transport_set_int(session, fd);
 264
 265         do {
 266                 ret = gnutls_handshake(session);
 267         }
 268         while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
 269         if (ret < 0) {
 270                 close(fd);
 271                 gnutls_deinit(session);
 272                 fail("server: Handshake has failed (%s)\n\n",
 273                      gnutls_strerror(ret));
 274                 terminate();
 275         }
 276         if (debug)
 277                 success("server: Handshake was completed\n");
 278
 279         if (debug)
 280                 success("server: TLS version is: %s\n",
 281                         gnutls_protocol_get_name
 282                         (gnutls_protocol_get_version(session)));
 283         close(fd);
 284         gnutls_deinit(session);
 285
 286         gnutls_anon_free_server_credentials(anoncred);
 287         gnutls_certificate_free_credentials(x509_cred);
 288
 289         gnutls_global_deinit();
 290
 291         if (debug)
 292                 success("server: finished\n");
 293 }
 294
 295 static void start(const char *msg, unsigned expl)
 296 {
 297         int fd[2];
 298         int ret;
 299
 300         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
 301         if (ret < 0) {
 302                 perror("socketpair");
 303                 exit(1);
 304         }
 305
 306         child = fork();
 307         if (child < 0) {
 308                 perror("fork");
 309                 fail("fork");
 310                 exit(1);
 311         }
 312
 313         if (child) {
 314                 /* parent */
 315                 close(fd[1]);
 316                 client(fd[0], msg, expl);
 317                 waitpid(-1, NULL, 0);
 318                 //kill(child, SIGTERM);
 319         } else {
 320                 close(fd[0]);
 321                 server(fd[1], expl);
 322                 exit(0);
 323         }
 324 }
 325
 326 static void ch_handler(int sig)
 327 {
 328         int status = 0;
 329
 330         waitpid(-1, &status, 0);
 331         if (WEXITSTATUS(status) != 0 ||
 332             (WIFSIGNALED(status) && WTERMSIG(status) == SIGSEGV)) {
 333                 if (WIFSIGNALED(status))
 334                         fail("Child died with sigsegv\n");
 335                 else
 336                         fail("Child died with status %d\n",
 337                              WEXITSTATUS(status));
 338                 terminate();
 339         }
 340         return;
 341 }
 342
 343 void doit(void)
 344 {
 345         signal(SIGCHLD, ch_handler);
 346
 347         start("TLS-explicit flag", GNUTLS_NONBLOCK);
 348         start("DTLS-explicit flag", GNUTLS_NONBLOCK|GNUTLS_DATAGRAM);
 349         start("TLS-no flag", 0);
 350 }
 351
 352 #endif                          /* _WIN32 */