ssl/ssltest.c

   1 /* ssl/ssltest.c */
   2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <string.h>
  62 #include <errno.h>
  63 #include <limits.h>
  64
  65 #include "openssl/e_os.h"
  66
  67 #include <openssl/bio.h>
  68 #include <openssl/crypto.h>
  69 #include <openssl/x509.h>
  70 #include <openssl/ssl.h>
  71 #include <openssl/err.h>
  72 #ifdef WINDOWS
  73 #include "../crypto/bio/bss_file.c"
  74 #endif
  75
  76 #if defined(NO_RSA) && !defined(NO_SSL2)
  77 #define NO_SSL2
  78 #endif
  79
  80 #ifdef VMS
  81 #  define TEST_SERVER_CERT "SYS$DISK:[-.APPS]SERVER.PEM"
  82 #  define TEST_CLIENT_CERT "SYS$DISK:[-.APPS]CLIENT.PEM"
  83 #else
  84 #  define TEST_SERVER_CERT "../apps/server.pem"
  85 #  define TEST_CLIENT_CERT "../apps/client.pem"
  86 #endif
  87
  88 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx);
  89 #ifndef NO_RSA
  90 static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export,int keylength);
  91 #endif
  92 #ifndef NO_DH
  93 static DH *get_dh512(void);
  94 #endif
  95 BIO *bio_err=NULL;
  96 BIO *bio_stdout=NULL;
  97
  98 static char *cipher=NULL;
  99 int verbose=0;
 100 int debug=0;
 101 #if 0
 102 /* Not used yet. */
 103 #ifdef FIONBIO
 104 static int s_nbio=0;
 105 #endif
 106 #endif
 107
 108
 109 int doit_biopair(SSL *s_ssl,SSL *c_ssl,long bytes);
 110 int doit(SSL *s_ssl,SSL *c_ssl,long bytes);
 111 static void sv_usage(void)
 112         {
 113         fprintf(stderr,"usage: ssltest [args ...]\n");
 114         fprintf(stderr,"\n");
 115         fprintf(stderr," -server_auth  - check server certificate\n");
 116         fprintf(stderr," -client_auth  - do client authentication\n");
 117         fprintf(stderr," -v            - more output\n");
 118         fprintf(stderr," -d            - debug output\n");
 119         fprintf(stderr," -reuse        - use session-id reuse\n");
 120         fprintf(stderr," -num <val>    - number of connections to perform\n");
 121         fprintf(stderr," -bytes <val>  - number of bytes to swap between client/server\n");
 122 #ifndef NO_SSL2
 123         fprintf(stderr," -ssl2         - use SSLv2\n");
 124 #endif
 125 #ifndef NO_SSL3
 126         fprintf(stderr," -ssl3         - use SSLv3\n");
 127 #endif
 128 #ifndef NO_TLS1
 129         fprintf(stderr," -tls1         - use TLSv1\n");
 130 #endif
 131         fprintf(stderr," -CApath arg   - PEM format directory of CA's\n");
 132         fprintf(stderr," -CAfile arg   - PEM format file of CA's\n");
 133         fprintf(stderr," -cert arg     - Certificate file\n");
 134         fprintf(stderr," -s_cert arg   - Just the server certificate file\n");
 135         fprintf(stderr," -c_cert arg   - Just the client certificate file\n");
 136         fprintf(stderr," -cipher arg   - The cipher list\n");
 137         fprintf(stderr," -bio_pair     - Use BIO pairs\n");
 138         fprintf(stderr," -f            - Test even cases that can't work\n");
 139         }
 140
 141 int main(int argc, char *argv[])
 142         {
 143         char *CApath=NULL,*CAfile=NULL;
 144         int badop=0;
 145         int bio_pair=0;
 146         int force=0;
 147         int tls1=0,ssl2=0,ssl3=0,ret=1;
 148         int client_auth=0;
 149         int server_auth=0,i;
 150         char *server_cert=TEST_SERVER_CERT;
 151         char *client_cert=TEST_CLIENT_CERT;
 152         SSL_CTX *s_ctx=NULL;
 153         SSL_CTX *c_ctx=NULL;
 154         SSL_METHOD *meth=NULL;
 155         SSL *c_ssl,*s_ssl;
 156         int number=1,reuse=0;
 157         long bytes=1L;
 158         SSL_CIPHER *ciph;
 159 #ifndef NO_DH
 160         DH *dh;
 161 #endif
 162
 163         bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
 164         bio_stdout=BIO_new_fp(stdout,BIO_NOCLOSE);
 165
 166         CRYPTO_mem_ctrl(CRYPTO_MEM_CHECK_ON);
 167
 168         argc--;
 169         argv++;
 170
 171         while (argc >= 1)
 172                 {
 173                 if      (strcmp(*argv,"-server_auth") == 0)
 174                         server_auth=1;
 175                 else if (strcmp(*argv,"-client_auth") == 0)
 176                         client_auth=1;
 177                 else if (strcmp(*argv,"-v") == 0)
 178                         verbose=1;
 179                 else if (strcmp(*argv,"-d") == 0)
 180                         debug=1;
 181                 else if (strcmp(*argv,"-reuse") == 0)
 182                         reuse=1;
 183                 else if (strcmp(*argv,"-ssl2") == 0)
 184                         ssl2=1;
 185                 else if (strcmp(*argv,"-tls1") == 0)
 186                         tls1=1;
 187                 else if (strcmp(*argv,"-ssl3") == 0)
 188                         ssl3=1;
 189                 else if (strncmp(*argv,"-num",4) == 0)
 190                         {
 191                         if (--argc < 1) goto bad;
 192                         number= atoi(*(++argv));
 193                         if (number == 0) number=1;
 194                         }
 195                 else if (strcmp(*argv,"-bytes") == 0)
 196                         {
 197                         if (--argc < 1) goto bad;
 198                         bytes= atol(*(++argv));
 199                         if (bytes == 0L) bytes=1L;
 200                         i=strlen(argv[0]);
 201                         if (argv[0][i-1] == 'k') bytes*=1024L;
 202                         if (argv[0][i-1] == 'm') bytes*=1024L*1024L;
 203                         }
 204                 else if (strcmp(*argv,"-cert") == 0)
 205                         {
 206                         if (--argc < 1) goto bad;
 207                         server_cert= *(++argv);
 208                         }
 209                 else if (strcmp(*argv,"-s_cert") == 0)
 210                         {
 211                         if (--argc < 1) goto bad;
 212                         server_cert= *(++argv);
 213                         }
 214                 else if (strcmp(*argv,"-c_cert") == 0)
 215                         {
 216                         if (--argc < 1) goto bad;
 217                         client_cert= *(++argv);
 218                         }
 219                 else if (strcmp(*argv,"-cipher") == 0)
 220                         {
 221                         if (--argc < 1) goto bad;
 222                         cipher= *(++argv);
 223                         }
 224                 else if (strcmp(*argv,"-CApath") == 0)
 225                         {
 226                         if (--argc < 1) goto bad;
 227                         CApath= *(++argv);
 228                         }
 229                 else if (strcmp(*argv,"-CAfile") == 0)
 230                         {
 231                         if (--argc < 1) goto bad;
 232                         CAfile= *(++argv);
 233                         }
 234                 else if (strcmp(*argv,"-bio_pair") == 0)
 235                         {
 236                         bio_pair = 1;
 237                         }
 238                 else if (strcmp(*argv,"-f") == 0)
 239                         {
 240                         force = 1;
 241                         }
 242                 else
 243                         {
 244                         fprintf(stderr,"unknown option %s\n",*argv);
 245                         badop=1;
 246                         break;
 247                         }
 248                 argc--;
 249                 argv++;
 250                 }
 251         if (badop)
 252                 {
 253 bad:
 254                 sv_usage();
 255                 goto end;
 256                 }
 257
 258         if (!ssl2 && !ssl3 && !tls1 && number > 1 && !reuse && !force)
 259                 {
 260                 fprintf(stderr, "This case cannot work.  Use -f switch to perform "
 261                         "the test anyway\n"
 262                         "(and -d to see what happens, "
 263                         "and -bio_pair to really make it happen :-)\n"
 264                         "or add one of -ssl2, -ssl3, -tls1, -reuse to "
 265                         "avoid protocol mismatch.\n");
 266                 exit(1);
 267                 }
 268
 269 /*      if (cipher == NULL) cipher=getenv("SSL_CIPHER"); */
 270
 271         SSL_library_init();
 272         SSL_load_error_strings();
 273
 274 #if !defined(NO_SSL2) && !defined(NO_SSL3)
 275         if (ssl2)
 276                 meth=SSLv2_method();
 277         else
 278         if (tls1)
 279                 meth=TLSv1_method();
 280         else
 281         if (ssl3)
 282                 meth=SSLv3_method();
 283         else
 284                 meth=SSLv23_method();
 285 #else
 286 #ifdef NO_SSL2
 287         meth=SSLv3_method();
 288 #else
 289         meth=SSLv2_method();
 290 #endif
 291 #endif
 292
 293         c_ctx=SSL_CTX_new(meth);
 294         s_ctx=SSL_CTX_new(meth);
 295         if ((c_ctx == NULL) || (s_ctx == NULL))
 296                 {
 297                 ERR_print_errors(bio_err);
 298                 goto end;
 299                 }
 300
 301         if (cipher != NULL)
 302                 {
 303                 SSL_CTX_set_cipher_list(c_ctx,cipher);
 304                 SSL_CTX_set_cipher_list(s_ctx,cipher);
 305                 }
 306
 307 #ifndef NO_DH
 308         dh=get_dh512();
 309         SSL_CTX_set_tmp_dh(s_ctx,dh);
 310         DH_free(dh);
 311 #endif
 312
 313 #ifndef NO_RSA
 314         SSL_CTX_set_tmp_rsa_callback(s_ctx,tmp_rsa_cb);
 315 #endif
 316
 317         if (!SSL_CTX_use_certificate_file(s_ctx,server_cert,SSL_FILETYPE_PEM))
 318                 {
 319                 ERR_print_errors(bio_err);
 320                 }
 321         else if (!SSL_CTX_use_PrivateKey_file(s_ctx,server_cert,
 322                 SSL_FILETYPE_PEM))
 323                 {
 324                 ERR_print_errors(bio_err);
 325                 goto end;
 326                 }
 327
 328         if (client_auth)
 329                 {
 330                 SSL_CTX_use_certificate_file(c_ctx,client_cert,
 331                         SSL_FILETYPE_PEM);
 332                 SSL_CTX_use_PrivateKey_file(c_ctx,client_cert,
 333                         SSL_FILETYPE_PEM);
 334                 }
 335
 336         if (    (!SSL_CTX_load_verify_locations(s_ctx,CAfile,CApath)) ||
 337                 (!SSL_CTX_set_default_verify_paths(s_ctx)) ||
 338                 (!SSL_CTX_load_verify_locations(c_ctx,CAfile,CApath)) ||
 339                 (!SSL_CTX_set_default_verify_paths(c_ctx)))
 340                 {
 341                 /* fprintf(stderr,"SSL_load_verify_locations\n"); */
 342                 ERR_print_errors(bio_err);
 343                 /* goto end; */
 344                 }
 345
 346         if (client_auth)
 347                 {
 348                 fprintf(stderr,"client authentication\n");
 349                 SSL_CTX_set_verify(s_ctx,
 350                         SSL_VERIFY_PEER|SSL_VERIFY_FAIL_IF_NO_PEER_CERT,
 351                         verify_callback);
 352                 }
 353         if (server_auth)
 354                 {
 355                 fprintf(stderr,"server authentication\n");
 356                 SSL_CTX_set_verify(c_ctx,SSL_VERIFY_PEER,
 357                         verify_callback);
 358                 }
 359
 360         c_ssl=SSL_new(c_ctx);
 361         s_ssl=SSL_new(s_ctx);
 362
 363         for (i=0; i<number; i++)
 364                 {
 365                 if (!reuse) SSL_set_session(c_ssl,NULL);
 366                 if (bio_pair)
 367                         ret=doit_biopair(s_ssl,c_ssl,bytes);
 368                 else
 369                         ret=doit(s_ssl,c_ssl,bytes);
 370                 }
 371
 372         if (!verbose)
 373                 {
 374                 ciph=SSL_get_current_cipher(c_ssl);
 375                 fprintf(stdout,"Protocol %s, cipher %s, %s\n",
 376                         SSL_get_version(c_ssl),
 377                         SSL_CIPHER_get_version(ciph),
 378                         SSL_CIPHER_get_name(ciph));
 379                 }
 380         if ((number > 1) || (bytes > 1L))
 381                 printf("%d handshakes of %ld bytes done\n",number,bytes);
 382
 383         SSL_free(s_ssl);
 384         SSL_free(c_ssl);
 385
 386 end:
 387         if (s_ctx != NULL) SSL_CTX_free(s_ctx);
 388         if (c_ctx != NULL) SSL_CTX_free(c_ctx);
 389
 390         if (bio_stdout != NULL) BIO_free(bio_stdout);
 391
 392         ERR_free_strings();
 393         ERR_remove_state(0);
 394         EVP_cleanup();
 395         CRYPTO_mem_leaks(bio_err);
 396         EXIT(ret);
 397         }
 398
 399 int doit_biopair(SSL *s_ssl, SSL *c_ssl, long count)
 400         {
 401         long cw_num = count, cr_num = count, sw_num = count, sr_num = count;
 402         BIO *s_ssl_bio = NULL, *c_ssl_bio = NULL;
 403         BIO *server = NULL, *server_io = NULL, *client = NULL, *client_io = NULL;
 404         SSL_CIPHER *ciph;
 405         int ret = 1;
 406
 407         size_t bufsiz = 256; /* small buffer for testing */
 408
 409         if (!BIO_new_bio_pair(&server, bufsiz, &server_io, bufsiz))
 410                 goto err;
 411         if (!BIO_new_bio_pair(&client, bufsiz, &client_io, bufsiz))
 412                 goto err;
 413
 414         s_ssl_bio = BIO_new(BIO_f_ssl());
 415         if (!s_ssl_bio)
 416                 goto err;
 417
 418         c_ssl_bio = BIO_new(BIO_f_ssl());
 419         if (!c_ssl_bio)
 420                 goto err;
 421
 422         SSL_set_connect_state(c_ssl);
 423         SSL_set_bio(c_ssl, client, client);
 424         (void)BIO_set_ssl(c_ssl_bio, c_ssl, BIO_NOCLOSE);
 425
 426         SSL_set_accept_state(s_ssl);
 427         SSL_set_bio(s_ssl, server, server);
 428         (void)BIO_set_ssl(s_ssl_bio, s_ssl, BIO_NOCLOSE);
 429
 430         do
 431                 {
 432                 /* c_ssl_bio:          SSL filter BIO
 433                  *
 434                  * client:             pseudo-I/O for SSL library
 435                  *
 436                  * client_io:          client's SSL communication; usually to be
 437                  *                     relayed over some I/O facility, but in this
 438                  *                     test program, we're the server, too:
 439                  *
 440                  * server_io:          server's SSL communication
 441                  *
 442                  * server:             pseudo-I/O for SSL library
 443                  *
 444                  * s_ssl_bio:          SSL filter BIO
 445                  *
 446                  * The client and the server each employ a "BIO pair":
 447                  * client + client_io, server + server_io.
 448                  * BIO pairs are symmetric.  A BIO pair behaves similar
 449                  * to a non-blocking socketpair (but both endpoints must
 450                  * be handled by the same thread).
 451                  *
 452                  * Useful functions for querying the state of BIO pair endpoints:
 453                  *
 454                  * BIO_ctrl_pending(bio)              number of bytes we can read now
 455                  * BIO_ctrl_get_read_request(bio)     number of bytes needed to fulfil
 456                  *                                      other side's read attempt
 457                  * BIO_ctrl_get_write_gurantee(bio)   number of bytes we can write now
 458                  *
 459                  * ..._read_request is never more than ..._write_guarantee;
 460                  * it depends on the application which one you should use.
 461                  */
 462
 463                 /* We have non-blocking behaviour throughout this test program, but
 464                  * can be sure that there is *some* progress in each iteration; so
 465                  * we don't have to worry about ..._SHOULD_READ or ..._SHOULD_WRITE
 466                  * -- we just try everything in each iteration
 467                  */
 468
 469                         {
 470                         /* CLIENT */
 471
 472                         MS_STATIC char cbuf[1024*8];
 473                         int i, r;
 474
 475                         if (debug)
 476                                 if (SSL_in_init(c_ssl))
 477                                         printf("client waiting in SSL_connect - %s\n",
 478                                                 SSL_state_string_long(c_ssl));
 479
 480                         if (cw_num > 0)
 481                                 {
 482                                 /* Write to server. */
 483
 484                                 if (cw_num > (long)sizeof cbuf)
 485                                         i = sizeof cbuf;
 486                                 else
 487                                         i = (int)cw_num;
 488                                 r = BIO_write(c_ssl_bio, cbuf, i);
 489                                 if (r == -1)
 490                                         {
 491                                         if (!BIO_should_retry(c_ssl_bio))
 492                                                 {
 493                                                 fprintf(stderr,"ERROR in CLIENT\n");
 494                                                 goto err;
 495                                                 }
 496                                         /* BIO_should_retry(...) can just be ignored here.
 497                                          * The library expects us to call BIO_write with
 498                                          * the same arguments again, and that's what we will
 499                                          * do in the next iteration. */
 500                                         }
 501                                 else if (r == 0)
 502                                         {
 503                                         fprintf(stderr,"SSL CLIENT STARTUP FAILED\n");
 504                                         goto err;
 505                                         }
 506                                 else
 507                                         {
 508                                         if (debug)
 509                                                 printf("client wrote %d\n", r);
 510                                         cw_num -= r;
 511                                         }
 512                                 }
 513
 514                         if (cr_num > 0)
 515                                 {
 516                                 /* Read from server. */
 517
 518                                 r = BIO_read(c_ssl_bio, cbuf, sizeof(cbuf));
 519                                 if (r < 0)
 520                                         {
 521                                         if (!BIO_should_retry(c_ssl_bio))
 522                                                 {
 523                                                 fprintf(stderr,"ERROR in CLIENT\n");
 524                                                 goto err;
 525                                                 }
 526                                         /* Again, "BIO_should_retry" can be ignored. */
 527                                         }
 528                                 else if (r == 0)
 529                                         {
 530                                         fprintf(stderr,"SSL CLIENT STARTUP FAILED\n");
 531                                         goto err;
 532                                         }
 533                                 else
 534                                         {
 535                                         if (debug)
 536                                                 printf("client read %d\n", r);
 537                                         cr_num -= r;
 538                                         }
 539                                 }
 540                         }
 541
 542                         {
 543                         /* SERVER */
 544
 545                         MS_STATIC char sbuf[1024*8];
 546                         int i, r;
 547
 548                         if (debug)
 549                                 if (SSL_in_init(s_ssl))
 550                                         printf("server waiting in SSL_accept - %s\n",
 551                                                 SSL_state_string_long(s_ssl));
 552
 553                         if (sw_num > 0)
 554                                 {
 555                                 /* Write to client. */
 556
 557                                 if (sw_num > (long)sizeof sbuf)
 558                                         i = sizeof sbuf;
 559                                 else
 560                                         i = (int)sw_num;
 561                                 r = BIO_write(s_ssl_bio, sbuf, i);
 562                                 if (r == -1)
 563                                         {
 564                                         if (!BIO_should_retry(s_ssl_bio))
 565                                                 {
 566                                                 fprintf(stderr,"ERROR in SERVER\n");
 567                                                 goto err;
 568                                                 }
 569                                         /* Ignore "BIO_should_retry". */
 570                                         }
 571                                 else if (r == 0)
 572                                         {
 573                                         fprintf(stderr,"SSL SERVER STARTUP FAILED\n");
 574                                         goto err;
 575                                         }
 576                                 else
 577                                         {
 578                                         if (debug)
 579                                                 printf("server wrote %d\n", r);
 580                                         sw_num -= r;
 581                                         }
 582                                 }
 583
 584                         if (sr_num > 0)
 585                                 {
 586                                 /* Read from client. */
 587
 588                                 r = BIO_read(s_ssl_bio, sbuf, sizeof(sbuf));
 589                                 if (r < 0)
 590                                         {
 591                                         if (!BIO_should_retry(s_ssl_bio))
 592                                                 {
 593                                                 fprintf(stderr,"ERROR in SERVER\n");
 594                                                 goto err;
 595                                                 }
 596                                         /* blah, blah */
 597                                         }
 598                                 else if (r == 0)
 599                                         {
 600                                         fprintf(stderr,"SSL SERVER STARTUP FAILED\n");
 601                                         goto err;
 602                                         }
 603                                 else
 604                                         {
 605                                         if (debug)
 606                                                 printf("server read %d\n", r);
 607                                         sr_num -= r;
 608                                         }
 609                                 }
 610                         }
 611
 612                         {
 613                         /* "I/O" BETWEEN CLIENT AND SERVER. */
 614
 615 #define RELAYBUFSIZ 200
 616                         static char buf[RELAYBUFSIZ];
 617
 618                         /* RELAYBUF is arbitrary.  When writing data over some real
 619                          * network, use a buffer of the same size as in the BIO_pipe
 620                          * and make that size large (for reading from the network
 621                          * small buffers usually won't hurt).
 622                          * Here sizes differ for testing. */
 623
 624                         size_t r1, r2;
 625                         size_t num;
 626                         int r;
 627                         static int prev_progress = 1;
 628                         int progress = 0;
 629
 630                         /* client to server */
 631                         do
 632                                 {
 633                                 r1 = BIO_ctrl_pending(client_io);
 634                                 r2 = BIO_ctrl_get_write_guarantee(server_io);
 635
 636                                 num = r1;
 637                                 if (r2 < num)
 638                                         num = r2;
 639                                 if (num)
 640                                         {
 641                                         if (sizeof buf < num)
 642                                                 num = sizeof buf;
 643                                         if (INT_MAX < num) /* yeah, right */
 644                                                 num = INT_MAX;
 645
 646                                         r = BIO_read(client_io, buf, (int)num);
 647                                         if (r != (int)num) /* can't happen */
 648                                                 {
 649                                                 fprintf(stderr, "ERROR: BIO_read could not read "
 650                                                         "BIO_ctrl_pending() bytes");
 651                                                 goto err;
 652                                                 }
 653                                         r = BIO_write(server_io, buf, (int)num);
 654                                         if (r != (int)num) /* can't happen */
 655                                                 {
 656                                                 fprintf(stderr, "ERROR: BIO_write could not write "
 657                                                         "BIO_ctrl_get_write_guarantee() bytes");
 658                                                 goto err;
 659                                                 }
 660                                         progress = 1;
 661
 662                                         if (debug)
 663                                                 printf("C->S relaying: %d bytes\n", (int)num);
 664                                         }
 665                                 }
 666                         while (r1 && r2);
 667
 668                         /* server to client */
 669                         do
 670                                 {
 671                                 r1 = BIO_ctrl_pending(server_io);
 672                                 r2 = BIO_ctrl_get_write_guarantee(client_io);
 673
 674                                 num = r1;
 675                                 if (r2 < num)
 676                                         num = r2;
 677                                 if (num)
 678                                         {
 679                                         if (sizeof buf < num)
 680                                                 num = sizeof buf;
 681                                         if (INT_MAX < num)
 682                                                 num = INT_MAX;
 683
 684                                         r = BIO_read(server_io, buf, (int)num);
 685                                         if (r != (int)num) /* can't happen */
 686                                                 {
 687                                                 fprintf(stderr, "ERROR: BIO_read could not read "
 688                                                         "BIO_ctrl_pending() bytes");
 689                                                 goto err;
 690                                                 }
 691                                         r = BIO_write(client_io, buf, (int)num);
 692                                         if (r != (int)num) /* can't happen */
 693                                                 {
 694                                                 fprintf(stderr, "ERROR: BIO_write could not write "
 695                                                         "BIO_ctrl_get_write_guarantee() bytes");
 696                                                 goto err;
 697                                                 }
 698                                         progress = 1;
 699
 700                                         if (debug)
 701                                                 printf("S->C relaying: %d bytes\n", (int)num);
 702                                         }
 703                                 }
 704                         while (r1 && r2);
 705
 706                         if (!progress && !prev_progress)
 707                                 if (cw_num > 0 || cr_num > 0 || sw_num > 0 || sr_num > 0)
 708                                         {
 709                                         fprintf(stderr, "ERROR: got stuck\n");
 710                                         if (strcmp("SSLv2", SSL_get_version(c_ssl)) == 0)
 711                                                 {
 712                                                 fprintf(stderr, "This can happen for SSL2 because "
 713                                                         "CLIENT-FINISHED and SERVER-VERIFY are written \n"
 714                                                         "concurrently ...");
 715                                                 if (strncmp("2SCF", SSL_state_string(c_ssl), 4) == 0
 716                                                         && strncmp("2SSV", SSL_state_string(s_ssl), 4) == 0)
 717                                                         {
 718                                                         fprintf(stderr, " ok.\n");
 719                                                         goto end;
 720                                                         }
 721                                                 }
 722                                         fprintf(stderr, " ERROR.\n");
 723                                         goto err;
 724                                         }
 725                         prev_progress = progress;
 726                         }
 727                 }
 728         while (cw_num > 0 || cr_num > 0 || sw_num > 0 || sr_num > 0);
 729
 730         ciph = SSL_get_current_cipher(c_ssl);
 731         if (verbose)
 732                 fprintf(stdout,"DONE via BIO pair, protocol %s, cipher %s, %s\n",
 733                         SSL_get_version(c_ssl),
 734                         SSL_CIPHER_get_version(ciph),
 735                         SSL_CIPHER_get_name(ciph));
 736  end:
 737         ret = 0;
 738
 739  err:
 740         ERR_print_errors(bio_err);
 741
 742         if (server)
 743                 BIO_free(server);
 744         if (server_io)
 745                 BIO_free(server_io);
 746         if (client)
 747                 BIO_free(client);
 748         if (client_io)
 749                 BIO_free(client_io);
 750         if (s_ssl_bio)
 751                 BIO_free(s_ssl_bio);
 752         if (c_ssl_bio)
 753                 BIO_free(c_ssl_bio);
 754
 755         return ret;
 756         }
 757
 758
 759 #define W_READ  1
 760 #define W_WRITE 2
 761 #define C_DONE  1
 762 #define S_DONE  2
 763
 764 int doit(SSL *s_ssl, SSL *c_ssl, long count)
 765         {
 766         MS_STATIC char cbuf[1024*8],sbuf[1024*8];
 767         long cw_num=count,cr_num=count;
 768         long sw_num=count,sr_num=count;
 769         int ret=1;
 770         BIO *c_to_s=NULL;
 771         BIO *s_to_c=NULL;
 772         BIO *c_bio=NULL;
 773         BIO *s_bio=NULL;
 774         int c_r,c_w,s_r,s_w;
 775         int c_want,s_want;
 776         int i,j;
 777         int done=0;
 778         int c_write,s_write;
 779         int do_server=0,do_client=0;
 780         SSL_CIPHER *ciph;
 781
 782         c_to_s=BIO_new(BIO_s_mem());
 783         s_to_c=BIO_new(BIO_s_mem());
 784         if ((s_to_c == NULL) || (c_to_s == NULL))
 785                 {
 786                 ERR_print_errors(bio_err);
 787                 goto err;
 788                 }
 789
 790         c_bio=BIO_new(BIO_f_ssl());
 791         s_bio=BIO_new(BIO_f_ssl());
 792         if ((c_bio == NULL) || (s_bio == NULL))
 793                 {
 794                 ERR_print_errors(bio_err);
 795                 goto err;
 796                 }
 797
 798         SSL_set_connect_state(c_ssl);
 799         SSL_set_bio(c_ssl,s_to_c,c_to_s);
 800         BIO_set_ssl(c_bio,c_ssl,BIO_NOCLOSE);
 801
 802         SSL_set_accept_state(s_ssl);
 803         SSL_set_bio(s_ssl,c_to_s,s_to_c);
 804         BIO_set_ssl(s_bio,s_ssl,BIO_NOCLOSE);
 805
 806         c_r=0; s_r=1;
 807         c_w=1; s_w=0;
 808         c_want=W_WRITE;
 809         s_want=0;
 810         c_write=1,s_write=0;
 811
 812         /* We can always do writes */
 813         for (;;)
 814                 {
 815                 do_server=0;
 816                 do_client=0;
 817
 818                 i=(int)BIO_pending(s_bio);
 819                 if ((i && s_r) || s_w) do_server=1;
 820
 821                 i=(int)BIO_pending(c_bio);
 822                 if ((i && c_r) || c_w) do_client=1;
 823
 824                 if (do_server && debug)
 825                         {
 826                         if (SSL_in_init(s_ssl))
 827                                 printf("server waiting in SSL_accept - %s\n",
 828                                         SSL_state_string_long(s_ssl));
 829 /*                      else if (s_write)
 830                                 printf("server:SSL_write()\n");
 831                         else
 832                                 printf("server:SSL_read()\n"); */
 833                         }
 834
 835                 if (do_client && debug)
 836                         {
 837                         if (SSL_in_init(c_ssl))
 838                                 printf("client waiting in SSL_connect - %s\n",
 839                                         SSL_state_string_long(c_ssl));
 840 /*                      else if (c_write)
 841                                 printf("client:SSL_write()\n");
 842                         else
 843                                 printf("client:SSL_read()\n"); */
 844                         }
 845
 846                 if (!do_client && !do_server)
 847                         {
 848                         fprintf(stdout,"ERROR IN STARTUP\n");
 849                         ERR_print_errors(bio_err);
 850                         break;
 851                         }
 852                 if (do_client && !(done & C_DONE))
 853                         {
 854                         if (c_write)
 855                                 {
 856                                 j=(cw_num > (long)sizeof(cbuf))
 857                                         ?sizeof(cbuf):(int)cw_num;
 858                                 i=BIO_write(c_bio,cbuf,j);
 859                                 if (i < 0)
 860                                         {
 861                                         c_r=0;
 862                                         c_w=0;
 863                                         if (BIO_should_retry(c_bio))
 864                                                 {
 865                                                 if (BIO_should_read(c_bio))
 866                                                         c_r=1;
 867                                                 if (BIO_should_write(c_bio))
 868                                                         c_w=1;
 869                                                 }
 870                                         else
 871                                                 {
 872                                                 fprintf(stderr,"ERROR in CLIENT\n");
 873                                                 ERR_print_errors(bio_err);
 874                                                 goto err;
 875                                                 }
 876                                         }
 877                                 else if (i == 0)
 878                                         {
 879                                         fprintf(stderr,"SSL CLIENT STARTUP FAILED\n");
 880                                         goto err;
 881                                         }
 882                                 else
 883                                         {
 884                                         if (debug)
 885                                                 printf("client wrote %d\n",i);
 886                                         /* ok */
 887                                         s_r=1;
 888                                         c_write=0;
 889                                         cw_num-=i;
 890                                         }
 891                                 }
 892                         else
 893                                 {
 894                                 i=BIO_read(c_bio,cbuf,sizeof(cbuf));
 895                                 if (i < 0)
 896                                         {
 897                                         c_r=0;
 898                                         c_w=0;
 899                                         if (BIO_should_retry(c_bio))
 900                                                 {
 901                                                 if (BIO_should_read(c_bio))
 902                                                         c_r=1;
 903                                                 if (BIO_should_write(c_bio))
 904                                                         c_w=1;
 905                                                 }
 906                                         else
 907                                                 {
 908                                                 fprintf(stderr,"ERROR in CLIENT\n");
 909                                                 ERR_print_errors(bio_err);
 910                                                 goto err;
 911                                                 }
 912                                         }
 913                                 else if (i == 0)
 914                                         {
 915                                         fprintf(stderr,"SSL CLIENT STARTUP FAILED\n");
 916                                         goto err;
 917                                         }
 918                                 else
 919                                         {
 920                                         if (debug)
 921                                                 printf("client read %d\n",i);
 922                                         cr_num-=i;
 923                                         if (sw_num > 0)
 924                                                 {
 925                                                 s_write=1;
 926                                                 s_w=1;
 927                                                 }
 928                                         if (cr_num <= 0)
 929                                                 {
 930                                                 s_write=1;
 931                                                 s_w=1;
 932                                                 done=S_DONE|C_DONE;
 933                                                 }
 934                                         }
 935                                 }
 936                         }
 937
 938                 if (do_server && !(done & S_DONE))
 939                         {
 940                         if (!s_write)
 941                                 {
 942                                 i=BIO_read(s_bio,sbuf,sizeof(cbuf));
 943                                 if (i < 0)
 944                                         {
 945                                         s_r=0;
 946                                         s_w=0;
 947                                         if (BIO_should_retry(s_bio))
 948                                                 {
 949                                                 if (BIO_should_read(s_bio))
 950                                                         s_r=1;
 951                                                 if (BIO_should_write(s_bio))
 952                                                         s_w=1;
 953                                                 }
 954                                         else
 955                                                 {
 956                                                 fprintf(stderr,"ERROR in SERVER\n");
 957                                                 ERR_print_errors(bio_err);
 958                                                 goto err;
 959                                                 }
 960                                         }
 961                                 else if (i == 0)
 962                                         {
 963                                         ERR_print_errors(bio_err);
 964                                         fprintf(stderr,"SSL SERVER STARTUP FAILED in SSL_read\n");
 965                                         goto err;
 966                                         }
 967                                 else
 968                                         {
 969                                         if (debug)
 970                                                 printf("server read %d\n",i);
 971                                         sr_num-=i;
 972                                         if (cw_num > 0)
 973                                                 {
 974                                                 c_write=1;
 975                                                 c_w=1;
 976                                                 }
 977                                         if (sr_num <= 0)
 978                                                 {
 979                                                 s_write=1;
 980                                                 s_w=1;
 981                                                 c_write=0;
 982                                                 }
 983                                         }
 984                                 }
 985                         else
 986                                 {
 987                                 j=(sw_num > (long)sizeof(sbuf))?
 988                                         sizeof(sbuf):(int)sw_num;
 989                                 i=BIO_write(s_bio,sbuf,j);
 990                                 if (i < 0)
 991                                         {
 992                                         s_r=0;
 993                                         s_w=0;
 994                                         if (BIO_should_retry(s_bio))
 995                                                 {
 996                                                 if (BIO_should_read(s_bio))
 997                                                         s_r=1;
 998                                                 if (BIO_should_write(s_bio))
 999                                                         s_w=1;
1000                                                 }
1001                                         else
1002                                                 {
1003                                                 fprintf(stderr,"ERROR in SERVER\n");
1004                                                 ERR_print_errors(bio_err);
1005                                                 goto err;
1006                                                 }
1007                                         }
1008                                 else if (i == 0)
1009                                         {
1010                                         ERR_print_errors(bio_err);
1011                                         fprintf(stderr,"SSL SERVER STARTUP FAILED in SSL_write\n");
1012                                         goto err;
1013                                         }
1014                                 else
1015                                         {
1016                                         if (debug)
1017                                                 printf("server wrote %d\n",i);
1018                                         sw_num-=i;
1019                                         s_write=0;
1020                                         c_r=1;
1021                                         if (sw_num <= 0)
1022                                                 done|=S_DONE;
1023                                         }
1024                                 }
1025                         }
1026
1027                 if ((done & S_DONE) && (done & C_DONE)) break;
1028                 }
1029
1030         ciph=SSL_get_current_cipher(c_ssl);
1031         if (verbose)
1032                 fprintf(stdout,"DONE, protocol %s, cipher %s, %s\n",
1033                         SSL_get_version(c_ssl),
1034                         SSL_CIPHER_get_version(ciph),
1035                         SSL_CIPHER_get_name(ciph));
1036         ret=0;
1037 err:
1038         /* We have to set the BIO's to NULL otherwise they will be
1039          * Free()ed twice.  Once when th s_ssl is SSL_free()ed and
1040          * again when c_ssl is SSL_free()ed.
1041          * This is a hack required because s_ssl and c_ssl are sharing the same
1042          * BIO structure and SSL_set_bio() and SSL_free() automatically
1043          * BIO_free non NULL entries.
1044          * You should not normally do this or be required to do this */
1045         if (s_ssl != NULL)
1046                 {
1047                 s_ssl->rbio=NULL;
1048                 s_ssl->wbio=NULL;
1049                 }
1050         if (c_ssl != NULL)
1051                 {
1052                 c_ssl->rbio=NULL;
1053                 c_ssl->wbio=NULL;
1054                 }
1055
1056         if (c_to_s != NULL) BIO_free(c_to_s);
1057         if (s_to_c != NULL) BIO_free(s_to_c);
1058         if (c_bio != NULL) BIO_free_all(c_bio);
1059         if (s_bio != NULL) BIO_free_all(s_bio);
1060         return(ret);
1061         }
1062
1063 int MS_CALLBACK verify_callback(int ok, X509_STORE_CTX *ctx)
1064         {
1065         char *s,buf[256];
1066
1067         s=X509_NAME_oneline(X509_get_subject_name(ctx->current_cert),buf,256);
1068         if (s != NULL)
1069                 {
1070                 if (ok)
1071                         fprintf(stderr,"depth=%d %s\n",ctx->error_depth,buf);
1072                 else
1073                         fprintf(stderr,"depth=%d error=%d %s\n",
1074                                 ctx->error_depth,ctx->error,buf);
1075                 }
1076
1077         if (ok == 0)
1078                 {
1079                 switch (ctx->error)
1080                         {
1081                 case X509_V_ERR_CERT_NOT_YET_VALID:
1082                 case X509_V_ERR_CERT_HAS_EXPIRED:
1083                 case X509_V_ERR_DEPTH_ZERO_SELF_SIGNED_CERT:
1084                         ok=1;
1085                         }
1086                 }
1087
1088         return(ok);
1089         }
1090
1091 #ifndef NO_DH
1092 static unsigned char dh512_p[]={
1093         0xDA,0x58,0x3C,0x16,0xD9,0x85,0x22,0x89,0xD0,0xE4,0xAF,0x75,
1094         0x6F,0x4C,0xCA,0x92,0xDD,0x4B,0xE5,0x33,0xB8,0x04,0xFB,0x0F,
1095         0xED,0x94,0xEF,0x9C,0x8A,0x44,0x03,0xED,0x57,0x46,0x50,0xD3,
1096         0x69,0x99,0xDB,0x29,0xD7,0x76,0x27,0x6B,0xA2,0xD3,0xD4,0x12,
1097         0xE2,0x18,0xF4,0xDD,0x1E,0x08,0x4C,0xF6,0xD8,0x00,0x3E,0x7C,
1098         0x47,0x74,0xE8,0x33,
1099         };
1100 static unsigned char dh512_g[]={
1101         0x02,
1102         };
1103
1104 static DH *get_dh512(void)
1105         {
1106         DH *dh=NULL;
1107
1108         if ((dh=DH_new()) == NULL) return(NULL);
1109         dh->p=BN_bin2bn(dh512_p,sizeof(dh512_p),NULL);
1110         dh->g=BN_bin2bn(dh512_g,sizeof(dh512_g),NULL);
1111         if ((dh->p == NULL) || (dh->g == NULL))
1112                 return(NULL);
1113         return(dh);
1114         }
1115 #endif
1116
1117 #ifndef NO_RSA
1118 static RSA MS_CALLBACK *tmp_rsa_cb(SSL *s, int is_export, int keylength)
1119         {
1120         static RSA *rsa_tmp=NULL;
1121
1122         if (rsa_tmp == NULL)
1123                 {
1124                 BIO_printf(bio_err,"Generating temp (%d bit) RSA key...",keylength);
1125                 (void)BIO_flush(bio_err);
1126                 rsa_tmp=RSA_generate_key(keylength,RSA_F4,NULL,NULL);
1127                 BIO_printf(bio_err,"\n");
1128                 (void)BIO_flush(bio_err);
1129                 }
1130         return(rsa_tmp);
1131         }
1132 #endif