tests/sign-md5-rep.c

   1 /*
   2  * Copyright (C) 2015 Nikos Mavrogiannopoulos
   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 <gnutls/gnutls.h>
  47 #include <gnutls/dtls.h>
  48 #include <signal.h>
  49
  50 #include "utils.h"
  51
  52 static void terminate(void);
  53
  54 /* This program tests whether MD5 is rejected by a client as a
  55  * signature algorithm for the ServerKeyExchange.
  56  */
  57
  58 static void server_log_func(int level, const char *str)
  59 {
  60         fprintf(stderr, "server|<%d>| %s", level, str);
  61 }
  62
  63 static void client_log_func(int level, const char *str)
  64 {
  65         fprintf(stderr, "client|<%d>| %s", level, str);
  66 }
  67
  68 static unsigned char server_cert_pem[] =
  69     "-----BEGIN CERTIFICATE-----\n"
  70     "MIICVjCCAcGgAwIBAgIERiYdMTALBgkqhkiG9w0BAQUwGTEXMBUGA1UEAxMOR251\n"
  71     "VExTIHRlc3QgQ0EwHhcNMDcwNDE4MTMyOTIxWhcNMDgwNDE3MTMyOTIxWjA3MRsw\n"
  72     "GQYDVQQKExJHbnVUTFMgdGVzdCBzZXJ2ZXIxGDAWBgNVBAMTD3Rlc3QuZ251dGxz\n"
  73     "Lm9yZzCBnDALBgkqhkiG9w0BAQEDgYwAMIGIAoGA17pcr6MM8C6pJ1aqU46o63+B\n"
  74     "dUxrmL5K6rce+EvDasTaDQC46kwTHzYWk95y78akXrJutsoKiFV1kJbtple8DDt2\n"
  75     "DZcevensf9Op7PuFZKBroEjOd35znDET/z3IrqVgbtm2jFqab7a+n2q9p/CgMyf1\n"
  76     "tx2S5Zacc1LWn9bIjrECAwEAAaOBkzCBkDAMBgNVHRMBAf8EAjAAMBoGA1UdEQQT\n"
  77     "MBGCD3Rlc3QuZ251dGxzLm9yZzATBgNVHSUEDDAKBggrBgEFBQcDATAPBgNVHQ8B\n"
  78     "Af8EBQMDB6AAMB0GA1UdDgQWBBTrx0Vu5fglyoyNgw106YbU3VW0dTAfBgNVHSME\n"
  79     "GDAWgBTpPBz7rZJu5gakViyi4cBTJ8jylTALBgkqhkiG9w0BAQUDgYEAaFEPTt+7\n"
  80     "bzvBuOf7+QmeQcn29kT6Bsyh1RHJXf8KTk5QRfwp6ogbp94JQWcNQ/S7YDFHglD1\n"
  81     "AwUNBRXwd3riUsMnsxgeSDxYBfJYbDLeohNBsqaPDJb7XailWbMQKfAbFQ8cnOxg\n"
  82     "rOKLUQRWJ0K3HyXRMhbqjdLIaQiCvQLuizo=\n" "-----END CERTIFICATE-----\n";
  83
  84 const gnutls_datum_t server_cert = { server_cert_pem,
  85         sizeof(server_cert_pem)
  86 };
  87
  88 static unsigned char server_key_pem[] =
  89     "-----BEGIN RSA PRIVATE KEY-----\n"
  90     "MIICXAIBAAKBgQDXulyvowzwLqknVqpTjqjrf4F1TGuYvkrqtx74S8NqxNoNALjq\n"
  91     "TBMfNhaT3nLvxqResm62ygqIVXWQlu2mV7wMO3YNlx696ex/06ns+4VkoGugSM53\n"
  92     "fnOcMRP/PciupWBu2baMWppvtr6far2n8KAzJ/W3HZLllpxzUtaf1siOsQIDAQAB\n"
  93     "AoGAYAFyKkAYC/PYF8e7+X+tsVCHXppp8AoP8TEZuUqOZz/AArVlle/ROrypg5kl\n"
  94     "8YunrvUdzH9R/KZ7saNZlAPLjZyFG9beL/am6Ai7q7Ma5HMqjGU8kTEGwD7K+lbG\n"
  95     "iomokKMOl+kkbY/2sI5Czmbm+/PqLXOjtVc5RAsdbgvtmvkCQQDdV5QuU8jap8Hs\n"
  96     "Eodv/tLJ2z4+SKCV2k/7FXSKWe0vlrq0cl2qZfoTUYRnKRBcWxc9o92DxK44wgPi\n"
  97     "oMQS+O7fAkEA+YG+K9e60sj1K4NYbMPAbYILbZxORDecvP8lcphvwkOVUqbmxOGh\n"
  98     "XRmTZUuhBrJhJKKf6u7gf3KWlPl6ShKEbwJASC118cF6nurTjuLf7YKARDjNTEws\n"
  99     "qZEeQbdWYINAmCMj0RH2P0mvybrsXSOD5UoDAyO7aWuqkHGcCLv6FGG+qwJAOVqq\n"
 100     "tXdUucl6GjOKKw5geIvRRrQMhb/m5scb+5iw8A4LEEHPgGiBaF5NtJZLALgWfo5n\n"
 101     "hmC8+G8F0F78znQtPwJBANexu+Tg5KfOnzSILJMo3oXiXhf5PqXIDmbN0BKyCKAQ\n"
 102     "LfkcEcUbVfmDaHpvzwY9VEaoMOKVLitETXdNSxVpvWM=\n"
 103     "-----END RSA PRIVATE KEY-----\n";
 104
 105 const gnutls_datum_t server_key = { server_key_pem,
 106         sizeof(server_key_pem)
 107 };
 108
 109
 110 static int handshake_callback(gnutls_session_t session, unsigned int htype,
 111         unsigned post, unsigned int incoming, const gnutls_datum_t *msg)
 112 {
 113         gnutls_priority_set_direct(session, "NORMAL:-KX-ALL:+ECDHE-RSA", NULL);
 114         return 0;
 115 }
 116
 117
 118 /* A very basic TLS client, with anonymous authentication.
 119  */
 120
 121 #define MAX_BUF 1024
 122
 123 static void client(int fd)
 124 {
 125         int ret;
 126         char buffer[MAX_BUF + 1];
 127         gnutls_certificate_credentials_t x509_cred;
 128         gnutls_session_t session;
 129         /* Need to enable anonymous KX specifically. */
 130
 131         global_init();
 132
 133         if (debug) {
 134                 gnutls_global_set_log_function(client_log_func);
 135                 gnutls_global_set_log_level(7);
 136         }
 137
 138         gnutls_certificate_allocate_credentials(&x509_cred);
 139
 140         /* Initialize TLS session
 141          */
 142         gnutls_init(&session, GNUTLS_CLIENT);
 143
 144         /* Use default priorities */
 145         gnutls_priority_set_direct(session, "NORMAL:-KX-ALL:+ECDHE-RSA:-SIGN-ALL:+SIGN-RSA-MD5", NULL);
 146
 147         /* put the anonymous credentials to the current session
 148          */
 149         gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
 150
 151         gnutls_transport_set_int(session, fd);
 152         gnutls_handshake_set_hook_function(session, GNUTLS_HANDSHAKE_SERVER_KEY_EXCHANGE,
 153                                            GNUTLS_HOOK_PRE,
 154                                            handshake_callback);
 155
 156         /* Perform the TLS handshake
 157          */
 158         do {
 159                 ret = gnutls_handshake(session);
 160         }
 161         while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
 162
 163         if (ret == GNUTLS_E_UNSUPPORTED_SIGNATURE_ALGORITHM) {
 164                 /* success */
 165                 goto end;
 166         }
 167
 168         if (ret < 0) {
 169                 terminate();
 170                 fail("client: Handshake failed: %s\n", gnutls_strerror(ret));
 171                 exit(1);
 172         } else {
 173                 if (debug)
 174                         success("client: Handshake was completed\n");
 175         }
 176
 177         if (gnutls_sign_algorithm_get(session) == GNUTLS_SIGN_RSA_MD5) {
 178                 terminate();
 179                 fail("client: MD5 was negotiated\n");
 180                 exit(1);
 181         }
 182         success("client: %s was negotiated\n", gnutls_sign_get_name(gnutls_sign_algorithm_get(session)));
 183
 184         if (debug)
 185                 success("client: TLS version is: %s\n",
 186                         gnutls_protocol_get_name
 187                         (gnutls_protocol_get_version(session)));
 188
 189         do {
 190                 do {
 191                         ret = gnutls_record_recv(session, buffer, MAX_BUF);
 192                 } while (ret == GNUTLS_E_AGAIN
 193                          || ret == GNUTLS_E_INTERRUPTED);
 194         } while (ret > 0);
 195
 196         if (ret == 0) {
 197                 if (debug)
 198                         success
 199                             ("client: Peer has closed the TLS connection\n");
 200                 goto end;
 201         } else if (ret < 0) {
 202                 terminate();
 203                 fail("client: Error: %s\n", gnutls_strerror(ret));
 204                 exit(1);
 205         }
 206
 207         gnutls_bye(session, GNUTLS_SHUT_WR);
 208
 209       end:
 210
 211         close(fd);
 212
 213         gnutls_deinit(session);
 214
 215         gnutls_certificate_free_credentials(x509_cred);
 216
 217         gnutls_global_deinit();
 218 }
 219
 220
 221 /* These are global */
 222 pid_t child;
 223
 224 static void terminate(void)
 225 {
 226         kill(child, SIGTERM);
 227         exit(1);
 228 }
 229
 230 static void server(int fd)
 231 {
 232         int ret;
 233         char buffer[MAX_BUF + 1];
 234         gnutls_session_t session;
 235         gnutls_certificate_credentials_t x509_cred;
 236
 237         /* this must be called once in the program
 238          */
 239         global_init();
 240         memset(buffer, 0, sizeof(buffer));
 241
 242         if (debug) {
 243                 gnutls_global_set_log_function(server_log_func);
 244                 gnutls_global_set_log_level(4711);
 245         }
 246
 247         gnutls_certificate_allocate_credentials(&x509_cred);
 248         gnutls_certificate_set_x509_key_mem(x509_cred, &server_cert,
 249                                             &server_key,
 250                                             GNUTLS_X509_FMT_PEM);
 251
 252         gnutls_init(&session, GNUTLS_SERVER);
 253
 254         /* avoid calling all the priority functions, since the defaults
 255          * are adequate.
 256          */
 257         gnutls_priority_set_direct(session, "NORMAL:-KX-ALL:+ECDHE-RSA:-SIGN-ALL:+SIGN-RSA-MD5", NULL);
 258
 259         gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE, x509_cred);
 260
 261         gnutls_transport_set_int(session, fd);
 262
 263         do {
 264                 ret = gnutls_handshake(session);
 265         } while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
 266         if (ret < 0) {
 267                 /* failure is expected here */
 268                 goto end;
 269         }
 270
 271         if (debug) {
 272                 success("server: Handshake was completed\n");
 273                 success("server: %s was negotiated\n", gnutls_sign_get_name(gnutls_sign_algorithm_get(session)));
 274         }
 275
 276         if (debug)
 277                 success("server: TLS version is: %s\n",
 278                         gnutls_protocol_get_name
 279                         (gnutls_protocol_get_version(session)));
 280
 281         /* do not wait for the peer to close the connection.
 282          */
 283         gnutls_bye(session, GNUTLS_SHUT_WR);
 284
 285  end:
 286         close(fd);
 287         gnutls_deinit(session);
 288
 289         gnutls_certificate_free_credentials(x509_cred);
 290
 291         gnutls_global_deinit();
 292
 293         if (debug)
 294                 success("server: finished\n");
 295 }
 296
 297 static void ch_handler(int sig)
 298 {
 299         int status;
 300         wait(&status);
 301         if (WEXITSTATUS(status) != 0 ||
 302             (WIFSIGNALED(status) && WTERMSIG(status) == SIGSEGV)) {
 303                 if (WIFSIGNALED(status))
 304                         fail("Child died with sigsegv\n");
 305                 else
 306                         fail("Child died with status %d\n",
 307                              WEXITSTATUS(status));
 308                 terminate();
 309         }
 310         return;
 311 }
 312
 313 void doit(void)
 314 {
 315         int fd[2];
 316         int ret;
 317
 318         signal(SIGCHLD, ch_handler);
 319
 320         ret = socketpair(AF_UNIX, SOCK_STREAM, 0, fd);
 321         if (ret < 0) {
 322                 perror("socketpair");
 323                 exit(1);
 324         }
 325
 326         child = fork();
 327         if (child < 0) {
 328                 perror("fork");
 329                 fail("fork");
 330                 exit(1);
 331         }
 332
 333         if (child) {
 334                 /* parent */
 335                 close(fd[1]);
 336                 client(fd[0]);
 337                 kill(child, SIGTERM);
 338         } else {
 339                 close(fd[0]);
 340                 server(fd[1]);
 341                 exit(0);
 342         }
 343 }
 344
 345 #endif                          /* _WIN32 */