apps/s_client.c

   1 /* apps/s_client.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 <assert.h>
  60 #include <stdio.h>
  61 #include <stdlib.h>
  62 #include <string.h>
  63 #ifdef NO_STDIO
  64 #define APPS_WIN16
  65 #endif
  66
  67 /* With IPv6, it looks like Digital has mixed up the proper order of
  68    recursive header file inclusion, resulting in the compiler complaining
  69    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
  70    is needed to have fileno() declared correctly...  So let's define u_int */
  71 #if defined(VMS) && defined(__DECC) && !defined(__U_INT)
  72 #define __U_INT
  73 typedef unsigned int u_int;
  74 #endif
  75
  76 #define USE_SOCKETS
  77 #include "apps.h"
  78 #include <openssl/x509.h>
  79 #include <openssl/ssl.h>
  80 #include <openssl/err.h>
  81 #include <openssl/pem.h>
  82 #include <openssl/rand.h>
  83 #include "s_apps.h"
  84
  85 #ifdef WINDOWS
  86 #include <conio.h>
  87 #endif
  88
  89
  90 #if (defined(VMS) && __VMS_VER < 70000000)
  91 /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
  92 #undef FIONBIO
  93 #endif
  94
  95 #undef PROG
  96 #define PROG    s_client_main
  97
  98 /*#define SSL_HOST_NAME "www.netscape.com" */
  99 /*#define SSL_HOST_NAME "193.118.187.102" */
 100 #define SSL_HOST_NAME   "localhost"
 101
 102 /*#define TEST_CERT "client.pem" */ /* no default cert. */
 103
 104 #undef BUFSIZZ
 105 #define BUFSIZZ 1024*8
 106
 107 extern int verify_depth;
 108 extern int verify_error;
 109
 110 #ifdef FIONBIO
 111 static int c_nbio=0;
 112 #endif
 113 static int c_Pause=0;
 114 static int c_debug=0;
 115 static int c_showcerts=0;
 116
 117 static void sc_usage(void);
 118 static void print_stuff(BIO *berr,SSL *con,int full);
 119 static BIO *bio_c_out=NULL;
 120 static int c_quiet=0;
 121 static int c_ign_eof=0;
 122
 123 static void sc_usage(void)
 124         {
 125         BIO_printf(bio_err,"usage: s_client args\n");
 126         BIO_printf(bio_err,"\n");
 127         BIO_printf(bio_err," -host host     - use -connect instead\n");
 128         BIO_printf(bio_err," -port port     - use -connect instead\n");
 129         BIO_printf(bio_err," -connect host:port - who to connect to (default is %s:%s)\n",SSL_HOST_NAME,PORT_STR);
 130
 131         BIO_printf(bio_err," -verify arg   - turn on peer certificate verification\n");
 132         BIO_printf(bio_err," -cert arg     - certificate file to use, PEM format assumed\n");
 133         BIO_printf(bio_err," -key arg      - Private key file to use, PEM format assumed, in cert file if\n");
 134         BIO_printf(bio_err,"                 not specified but cert file is.\n");
 135         BIO_printf(bio_err," -CApath arg   - PEM format directory of CA's\n");
 136         BIO_printf(bio_err," -CAfile arg   - PEM format file of CA's\n");
 137         BIO_printf(bio_err," -reconnect    - Drop and re-make the connection with the same Session-ID\n");
 138         BIO_printf(bio_err," -pause        - sleep(1) after each read(2) and write(2) system call\n");
 139         BIO_printf(bio_err," -showcerts    - show all certificates in the chain\n");
 140         BIO_printf(bio_err," -debug        - extra output\n");
 141         BIO_printf(bio_err," -nbio_test    - more ssl protocol testing\n");
 142         BIO_printf(bio_err," -state        - print the 'ssl' states\n");
 143 #ifdef FIONBIO
 144         BIO_printf(bio_err," -nbio         - Run with non-blocking IO\n");
 145 #endif
 146         BIO_printf(bio_err," -crlf         - convert LF from terminal into CRLF\n");
 147         BIO_printf(bio_err," -quiet        - no s_client output\n");
 148         BIO_printf(bio_err," -ign_eof      - ignore input eof (default when -quiet)\n");
 149         BIO_printf(bio_err," -ssl2         - just use SSLv2\n");
 150         BIO_printf(bio_err," -ssl3         - just use SSLv3\n");
 151         BIO_printf(bio_err," -tls1         - just use TLSv1\n");
 152         BIO_printf(bio_err," -no_tls1/-no_ssl3/-no_ssl2 - turn off that protocol\n");
 153         BIO_printf(bio_err," -bugs         - Switch on all SSL implementation bug workarounds\n");
 154         BIO_printf(bio_err," -cipher       - preferred cipher to use, use the 'openssl ciphers'\n");
 155         BIO_printf(bio_err,"                 command to see what is available\n");
 156         BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 157
 158         }
 159
 160 int MAIN(int, char **);
 161
 162 int MAIN(int argc, char **argv)
 163         {
 164         int off=0;
 165         SSL *con=NULL,*con2=NULL;
 166         int s,k,width,state=0;
 167         char *cbuf=NULL,*sbuf=NULL;
 168         int cbuf_len,cbuf_off;
 169         int sbuf_len,sbuf_off;
 170         fd_set readfds,writefds;
 171         short port=PORT;
 172         int full_log=1;
 173         char *host=SSL_HOST_NAME;
 174         char *cert_file=NULL,*key_file=NULL;
 175         char *CApath=NULL,*CAfile=NULL,*cipher=NULL;
 176         int reconnect=0,badop=0,verify=SSL_VERIFY_NONE,bugs=0;
 177         int crlf=0;
 178         int write_tty,read_tty,write_ssl,read_ssl,tty_on,ssl_pending;
 179         SSL_CTX *ctx=NULL;
 180         int ret=1,in_init=1,i,nbio_test=0;
 181         int prexit = 0;
 182         SSL_METHOD *meth=NULL;
 183         BIO *sbio;
 184         char *inrand=NULL;
 185 #ifdef WINDOWS
 186         struct timeval tv;
 187 #endif
 188
 189 #if !defined(NO_SSL2) && !defined(NO_SSL3)
 190         meth=SSLv23_client_method();
 191 #elif !defined(NO_SSL3)
 192         meth=SSLv3_client_method();
 193 #elif !defined(NO_SSL2)
 194         meth=SSLv2_client_method();
 195 #endif
 196
 197         apps_startup();
 198         c_Pause=0;
 199         c_quiet=0;
 200         c_ign_eof=0;
 201         c_debug=0;
 202         c_showcerts=0;
 203
 204         if (bio_err == NULL)
 205                 bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
 206
 207         if (    ((cbuf=OPENSSL_malloc(BUFSIZZ)) == NULL) ||
 208                 ((sbuf=OPENSSL_malloc(BUFSIZZ)) == NULL))
 209                 {
 210                 BIO_printf(bio_err,"out of memory\n");
 211                 goto end;
 212                 }
 213
 214         verify_depth=0;
 215         verify_error=X509_V_OK;
 216 #ifdef FIONBIO
 217         c_nbio=0;
 218 #endif
 219
 220         argc--;
 221         argv++;
 222         while (argc >= 1)
 223                 {
 224                 if      (strcmp(*argv,"-host") == 0)
 225                         {
 226                         if (--argc < 1) goto bad;
 227                         host= *(++argv);
 228                         }
 229                 else if (strcmp(*argv,"-port") == 0)
 230                         {
 231                         if (--argc < 1) goto bad;
 232                         port=atoi(*(++argv));
 233                         if (port == 0) goto bad;
 234                         }
 235                 else if (strcmp(*argv,"-connect") == 0)
 236                         {
 237                         if (--argc < 1) goto bad;
 238                         if (!extract_host_port(*(++argv),&host,NULL,&port))
 239                                 goto bad;
 240                         }
 241                 else if (strcmp(*argv,"-verify") == 0)
 242                         {
 243                         verify=SSL_VERIFY_PEER;
 244                         if (--argc < 1) goto bad;
 245                         verify_depth=atoi(*(++argv));
 246                         BIO_printf(bio_err,"verify depth is %d\n",verify_depth);
 247                         }
 248                 else if (strcmp(*argv,"-cert") == 0)
 249                         {
 250                         if (--argc < 1) goto bad;
 251                         cert_file= *(++argv);
 252                         }
 253                 else if (strcmp(*argv,"-prexit") == 0)
 254                         prexit=1;
 255                 else if (strcmp(*argv,"-crlf") == 0)
 256                         crlf=1;
 257                 else if (strcmp(*argv,"-quiet") == 0)
 258                         {
 259                         c_quiet=1;
 260                         c_ign_eof=1;
 261                         }
 262                 else if (strcmp(*argv,"-ign_eof") == 0)
 263                         c_ign_eof=1;
 264                 else if (strcmp(*argv,"-pause") == 0)
 265                         c_Pause=1;
 266                 else if (strcmp(*argv,"-debug") == 0)
 267                         c_debug=1;
 268                 else if (strcmp(*argv,"-showcerts") == 0)
 269                         c_showcerts=1;
 270                 else if (strcmp(*argv,"-nbio_test") == 0)
 271                         nbio_test=1;
 272                 else if (strcmp(*argv,"-state") == 0)
 273                         state=1;
 274 #ifndef NO_SSL2
 275                 else if (strcmp(*argv,"-ssl2") == 0)
 276                         meth=SSLv2_client_method();
 277 #endif
 278 #ifndef NO_SSL3
 279                 else if (strcmp(*argv,"-ssl3") == 0)
 280                         meth=SSLv3_client_method();
 281 #endif
 282 #ifndef NO_TLS1
 283                 else if (strcmp(*argv,"-tls1") == 0)
 284                         meth=TLSv1_client_method();
 285 #endif
 286                 else if (strcmp(*argv,"-bugs") == 0)
 287                         bugs=1;
 288                 else if (strcmp(*argv,"-key") == 0)
 289                         {
 290                         if (--argc < 1) goto bad;
 291                         key_file= *(++argv);
 292                         }
 293                 else if (strcmp(*argv,"-reconnect") == 0)
 294                         {
 295                         reconnect=5;
 296                         }
 297                 else if (strcmp(*argv,"-CApath") == 0)
 298                         {
 299                         if (--argc < 1) goto bad;
 300                         CApath= *(++argv);
 301                         }
 302                 else if (strcmp(*argv,"-CAfile") == 0)
 303                         {
 304                         if (--argc < 1) goto bad;
 305                         CAfile= *(++argv);
 306                         }
 307                 else if (strcmp(*argv,"-no_tls1") == 0)
 308                         off|=SSL_OP_NO_TLSv1;
 309                 else if (strcmp(*argv,"-no_ssl3") == 0)
 310                         off|=SSL_OP_NO_SSLv3;
 311                 else if (strcmp(*argv,"-no_ssl2") == 0)
 312                         off|=SSL_OP_NO_SSLv2;
 313                 else if (strcmp(*argv,"-cipher") == 0)
 314                         {
 315                         if (--argc < 1) goto bad;
 316                         cipher= *(++argv);
 317                         }
 318 #ifdef FIONBIO
 319                 else if (strcmp(*argv,"-nbio") == 0)
 320                         { c_nbio=1; }
 321 #endif
 322                 else if (strcmp(*argv,"-rand") == 0)
 323                         {
 324                         if (--argc < 1) goto bad;
 325                         inrand= *(++argv);
 326                         }
 327                 else
 328                         {
 329                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 330                         badop=1;
 331                         break;
 332                         }
 333                 argc--;
 334                 argv++;
 335                 }
 336         if (badop)
 337                 {
 338 bad:
 339                 sc_usage();
 340                 goto end;
 341                 }
 342
 343         if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
 344                 && !RAND_status())
 345                 {
 346                 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 347                 }
 348         if (inrand != NULL)
 349                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 350                         app_RAND_load_files(inrand));
 351
 352         if (bio_c_out == NULL)
 353                 {
 354                 if (c_quiet)
 355                         {
 356                         bio_c_out=BIO_new(BIO_s_null());
 357                         }
 358                 else
 359                         {
 360                         if (bio_c_out == NULL)
 361                                 bio_c_out=BIO_new_fp(stdout,BIO_NOCLOSE);
 362                         }
 363                 }
 364
 365         OpenSSL_add_ssl_algorithms();
 366         SSL_load_error_strings();
 367         ctx=SSL_CTX_new(meth);
 368         if (ctx == NULL)
 369                 {
 370                 ERR_print_errors(bio_err);
 371                 goto end;
 372                 }
 373
 374         if (bugs)
 375                 SSL_CTX_set_options(ctx,SSL_OP_ALL|off);
 376         else
 377                 SSL_CTX_set_options(ctx,off);
 378
 379         if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);
 380         if (cipher != NULL)
 381                 if(!SSL_CTX_set_cipher_list(ctx,cipher)) {
 382                 BIO_printf(bio_err,"error setting cipher list\n");
 383                 ERR_print_errors(bio_err);
 384                 goto end;
 385         }
 386 #if 0
 387         else
 388                 SSL_CTX_set_cipher_list(ctx,getenv("SSL_CIPHER"));
 389 #endif
 390
 391         SSL_CTX_set_verify(ctx,verify,verify_callback);
 392         if (!set_cert_stuff(ctx,cert_file,key_file))
 393                 goto end;
 394
 395         if ((!SSL_CTX_load_verify_locations(ctx,CAfile,CApath)) ||
 396                 (!SSL_CTX_set_default_verify_paths(ctx)))
 397                 {
 398                 /* BIO_printf(bio_err,"error setting default verify locations\n"); */
 399                 ERR_print_errors(bio_err);
 400                 /* goto end; */
 401                 }
 402
 403
 404         con=SSL_new(ctx);
 405 /*      SSL_set_cipher_list(con,"RC4-MD5"); */
 406
 407 re_start:
 408
 409         if (init_client(&s,host,port) == 0)
 410                 {
 411                 BIO_printf(bio_err,"connect:errno=%d\n",get_last_socket_error());
 412                 SHUTDOWN(s);
 413                 goto end;
 414                 }
 415         BIO_printf(bio_c_out,"CONNECTED(%08X)\n",s);
 416
 417 #ifdef FIONBIO
 418         if (c_nbio)
 419                 {
 420                 unsigned long l=1;
 421                 BIO_printf(bio_c_out,"turning on non blocking io\n");
 422                 if (BIO_socket_ioctl(s,FIONBIO,&l) < 0)
 423                         {
 424                         ERR_print_errors(bio_err);
 425                         goto end;
 426                         }
 427                 }
 428 #endif
 429         if (c_Pause & 0x01) con->debug=1;
 430         sbio=BIO_new_socket(s,BIO_NOCLOSE);
 431
 432         if (nbio_test)
 433                 {
 434                 BIO *test;
 435
 436                 test=BIO_new(BIO_f_nbio_test());
 437                 sbio=BIO_push(test,sbio);
 438                 }
 439
 440         if (c_debug)
 441                 {
 442                 con->debug=1;
 443                 BIO_set_callback(sbio,bio_dump_cb);
 444                 BIO_set_callback_arg(sbio,bio_c_out);
 445                 }
 446
 447         SSL_set_bio(con,sbio,sbio);
 448         SSL_set_connect_state(con);
 449
 450         /* ok, lets connect */
 451         width=SSL_get_fd(con)+1;
 452
 453         read_tty=1;
 454         write_tty=0;
 455         tty_on=0;
 456         read_ssl=1;
 457         write_ssl=1;
 458
 459         cbuf_len=0;
 460         cbuf_off=0;
 461         sbuf_len=0;
 462         sbuf_off=0;
 463
 464         for (;;)
 465                 {
 466                 FD_ZERO(&readfds);
 467                 FD_ZERO(&writefds);
 468
 469                 if (SSL_in_init(con) && !SSL_total_renegotiations(con))
 470                         {
 471                         in_init=1;
 472                         tty_on=0;
 473                         }
 474                 else
 475                         {
 476                         tty_on=1;
 477                         if (in_init)
 478                                 {
 479                                 in_init=0;
 480                                 print_stuff(bio_c_out,con,full_log);
 481                                 if (full_log > 0) full_log--;
 482
 483                                 if (reconnect)
 484                                         {
 485                                         reconnect--;
 486                                         BIO_printf(bio_c_out,"drop connection and then reconnect\n");
 487                                         SSL_shutdown(con);
 488                                         SSL_set_connect_state(con);
 489                                         SHUTDOWN(SSL_get_fd(con));
 490                                         goto re_start;
 491                                         }
 492                                 }
 493                         }
 494
 495                 ssl_pending = read_ssl && SSL_pending(con);
 496
 497                 if (!ssl_pending)
 498                         {
 499 #ifndef WINDOWS
 500                         if (tty_on)
 501                                 {
 502                                 if (read_tty)  FD_SET(fileno(stdin),&readfds);
 503                                 if (write_tty) FD_SET(fileno(stdout),&writefds);
 504                                 }
 505                         if (read_ssl)
 506                                 FD_SET(SSL_get_fd(con),&readfds);
 507                         if (write_ssl)
 508                                 FD_SET(SSL_get_fd(con),&writefds);
 509 #else
 510                         if(!tty_on || !write_tty) {
 511                                 if (read_ssl)
 512                                         FD_SET(SSL_get_fd(con),&readfds);
 513                                 if (write_ssl)
 514                                         FD_SET(SSL_get_fd(con),&writefds);
 515                         }
 516 #endif
 517 /*                      printf("mode tty(%d %d%d) ssl(%d%d)\n",
 518                                 tty_on,read_tty,write_tty,read_ssl,write_ssl);*/
 519
 520                         /* Note: under VMS with SOCKETSHR the second parameter
 521                          * is currently of type (int *) whereas under other
 522                          * systems it is (void *) if you don't have a cast it
 523                          * will choke the compiler: if you do have a cast then
 524                          * you can either go for (int *) or (void *).
 525                          */
 526 #ifdef WINDOWS
 527                         /* Under Windows we make the assumption that we can
 528                          * always write to the tty: therefore if we need to
 529                          * write to the tty we just fall through. Otherwise
 530                          * we timeout the select every second and see if there
 531                          * are any keypresses. Note: this is a hack, in a proper
 532                          * Windows application we wouldn't do this.
 533                          */
 534                         i=0;
 535                         if(!write_tty) {
 536                                 if(read_tty) {
 537                                         tv.tv_sec = 1;
 538                                         tv.tv_usec = 0;
 539                                         i=select(width,(void *)&readfds,(void *)&writefds,
 540                                                  NULL,&tv);
 541                                         if(!i && (!((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0))) || !read_tty) ) continue;
 542                                 } else  i=select(width,(void *)&readfds,(void *)&writefds,
 543                                          NULL,NULL);
 544                         }
 545 #else
 546                         i=select(width,(void *)&readfds,(void *)&writefds,
 547                                  NULL,NULL);
 548 #endif
 549                         if ( i < 0)
 550                                 {
 551                                 BIO_printf(bio_err,"bad select %d\n",
 552                                 get_last_socket_error());
 553                                 goto shut;
 554                                 /* goto end; */
 555                                 }
 556                         }
 557
 558                 if (!ssl_pending && FD_ISSET(SSL_get_fd(con),&writefds))
 559                         {
 560                         k=SSL_write(con,&(cbuf[cbuf_off]),
 561                                 (unsigned int)cbuf_len);
 562                         switch (SSL_get_error(con,k))
 563                                 {
 564                         case SSL_ERROR_NONE:
 565                                 cbuf_off+=k;
 566                                 cbuf_len-=k;
 567                                 if (k <= 0) goto end;
 568                                 /* we have done a  write(con,NULL,0); */
 569                                 if (cbuf_len <= 0)
 570                                         {
 571                                         read_tty=1;
 572                                         write_ssl=0;
 573                                         }
 574                                 else /* if (cbuf_len > 0) */
 575                                         {
 576                                         read_tty=0;
 577                                         write_ssl=1;
 578                                         }
 579                                 break;
 580                         case SSL_ERROR_WANT_WRITE:
 581                                 BIO_printf(bio_c_out,"write W BLOCK\n");
 582                                 write_ssl=1;
 583                                 read_tty=0;
 584                                 break;
 585                         case SSL_ERROR_WANT_READ:
 586                                 BIO_printf(bio_c_out,"write R BLOCK\n");
 587                                 write_tty=0;
 588                                 read_ssl=1;
 589                                 write_ssl=0;
 590                                 break;
 591                         case SSL_ERROR_WANT_X509_LOOKUP:
 592                                 BIO_printf(bio_c_out,"write X BLOCK\n");
 593                                 break;
 594                         case SSL_ERROR_ZERO_RETURN:
 595                                 if (cbuf_len != 0)
 596                                         {
 597                                         BIO_printf(bio_c_out,"shutdown\n");
 598                                         goto shut;
 599                                         }
 600                                 else
 601                                         {
 602                                         read_tty=1;
 603                                         write_ssl=0;
 604                                         break;
 605                                         }
 606
 607                         case SSL_ERROR_SYSCALL:
 608                                 if ((k != 0) || (cbuf_len != 0))
 609                                         {
 610                                         BIO_printf(bio_err,"write:errno=%d\n",
 611                                                 get_last_socket_error());
 612                                         goto shut;
 613                                         }
 614                                 else
 615                                         {
 616                                         read_tty=1;
 617                                         write_ssl=0;
 618                                         }
 619                                 break;
 620                         case SSL_ERROR_SSL:
 621                                 ERR_print_errors(bio_err);
 622                                 goto shut;
 623                                 }
 624                         }
 625 #ifdef WINDOWS
 626                 /* Assume Windows can always write */
 627                 else if (!ssl_pending && write_tty)
 628 #else
 629                 else if (!ssl_pending && FD_ISSET(fileno(stdout),&writefds))
 630 #endif
 631                         {
 632 #ifdef CHARSET_EBCDIC
 633                         ascii2ebcdic(&(sbuf[sbuf_off]),&(sbuf[sbuf_off]),sbuf_len);
 634 #endif
 635                         i=write(fileno(stdout),&(sbuf[sbuf_off]),sbuf_len);
 636
 637                         if (i <= 0)
 638                                 {
 639                                 BIO_printf(bio_c_out,"DONE\n");
 640                                 goto shut;
 641                                 /* goto end; */
 642                                 }
 643
 644                         sbuf_len-=i;;
 645                         sbuf_off+=i;
 646                         if (sbuf_len <= 0)
 647                                 {
 648                                 read_ssl=1;
 649                                 write_tty=0;
 650                                 }
 651                         }
 652                 else if (ssl_pending || FD_ISSET(SSL_get_fd(con),&readfds))
 653                         {
 654 #ifdef RENEG
 655 { static int iiii; if (++iiii == 52) { SSL_renegotiate(con); iiii=0; } }
 656 #endif
 657 #if 1
 658                         k=SSL_read(con,sbuf,1024 /* BUFSIZZ */ );
 659 #else
 660 /* Demo for pending and peek :-) */
 661                         k=SSL_read(con,sbuf,16);
 662 { char zbuf[10240];
 663 printf("read=%d pending=%d peek=%d\n",k,SSL_pending(con),SSL_peek(con,zbuf,10240));
 664 }
 665 #endif
 666
 667                         switch (SSL_get_error(con,k))
 668                                 {
 669                         case SSL_ERROR_NONE:
 670                                 if (k <= 0)
 671                                         goto end;
 672                                 sbuf_off=0;
 673                                 sbuf_len=k;
 674
 675                                 read_ssl=0;
 676                                 write_tty=1;
 677                                 break;
 678                         case SSL_ERROR_WANT_WRITE:
 679                                 BIO_printf(bio_c_out,"read W BLOCK\n");
 680                                 write_ssl=1;
 681                                 read_tty=0;
 682                                 break;
 683                         case SSL_ERROR_WANT_READ:
 684                                 BIO_printf(bio_c_out,"read R BLOCK\n");
 685                                 write_tty=0;
 686                                 read_ssl=1;
 687                                 if ((read_tty == 0) && (write_ssl == 0))
 688                                         write_ssl=1;
 689                                 break;
 690                         case SSL_ERROR_WANT_X509_LOOKUP:
 691                                 BIO_printf(bio_c_out,"read X BLOCK\n");
 692                                 break;
 693                         case SSL_ERROR_SYSCALL:
 694                                 BIO_printf(bio_err,"read:errno=%d\n",get_last_socket_error());
 695                                 goto shut;
 696                         case SSL_ERROR_ZERO_RETURN:
 697                                 BIO_printf(bio_c_out,"closed\n");
 698                                 goto shut;
 699                         case SSL_ERROR_SSL:
 700                                 ERR_print_errors(bio_err);
 701                                 goto shut;
 702                                 /* break; */
 703                                 }
 704                         }
 705
 706 #ifdef WINDOWS
 707                 else if ((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0)))
 708 #else
 709                 else if (FD_ISSET(fileno(stdin),&readfds))
 710 #endif
 711                         {
 712                         if (crlf)
 713                                 {
 714                                 int j, lf_num;
 715
 716                                 i=read(fileno(stdin),cbuf,BUFSIZZ/2);
 717                                 lf_num = 0;
 718                                 /* both loops are skipped when i <= 0 */
 719                                 for (j = 0; j < i; j++)
 720                                         if (cbuf[j] == '\n')
 721                                                 lf_num++;
 722                                 for (j = i-1; j >= 0; j--)
 723                                         {
 724                                         cbuf[j+lf_num] = cbuf[j];
 725                                         if (cbuf[j] == '\n')
 726                                                 {
 727                                                 lf_num--;
 728                                                 i++;
 729                                                 cbuf[j+lf_num] = '\r';
 730                                                 }
 731                                         }
 732                                 assert(lf_num == 0);
 733                                 }
 734                         else
 735                                 i=read(fileno(stdin),cbuf,BUFSIZZ);
 736
 737                         if ((!c_ign_eof) && ((i <= 0) || (cbuf[0] == 'Q')))
 738                                 {
 739                                 BIO_printf(bio_err,"DONE\n");
 740                                 goto shut;
 741                                 }
 742
 743                         if ((!c_ign_eof) && (cbuf[0] == 'R'))
 744                                 {
 745                                 BIO_printf(bio_err,"RENEGOTIATING\n");
 746                                 SSL_renegotiate(con);
 747                                 cbuf_len=0;
 748                                 }
 749                         else
 750                                 {
 751                                 cbuf_len=i;
 752                                 cbuf_off=0;
 753 #ifdef CHARSET_EBCDIC
 754                                 ebcdic2ascii(cbuf, cbuf, i);
 755 #endif
 756                                 }
 757
 758                         write_ssl=1;
 759                         read_tty=0;
 760                         }
 761                 }
 762 shut:
 763         SSL_shutdown(con);
 764         SHUTDOWN(SSL_get_fd(con));
 765         ret=0;
 766 end:
 767         if(prexit) print_stuff(bio_c_out,con,1);
 768         if (con != NULL) SSL_free(con);
 769         if (con2 != NULL) SSL_free(con2);
 770         if (ctx != NULL) SSL_CTX_free(ctx);
 771         if (cbuf != NULL) { memset(cbuf,0,BUFSIZZ); OPENSSL_free(cbuf); }
 772         if (sbuf != NULL) { memset(sbuf,0,BUFSIZZ); OPENSSL_free(sbuf); }
 773         if (bio_c_out != NULL)
 774                 {
 775                 BIO_free(bio_c_out);
 776                 bio_c_out=NULL;
 777                 }
 778         EXIT(ret);
 779         }
 780
 781
 782 static void print_stuff(BIO *bio, SSL *s, int full)
 783         {
 784         X509 *peer=NULL;
 785         char *p;
 786         static char *space="                ";
 787         char buf[BUFSIZ];
 788         STACK_OF(X509) *sk;
 789         STACK_OF(X509_NAME) *sk2;
 790         SSL_CIPHER *c;
 791         X509_NAME *xn;
 792         int j,i;
 793
 794         if (full)
 795                 {
 796                 int got_a_chain = 0;
 797
 798                 sk=SSL_get_peer_cert_chain(s);
 799                 if (sk != NULL)
 800                         {
 801                         got_a_chain = 1; /* we don't have it for SSL2 (yet) */
 802
 803                         BIO_printf(bio,"---\nCertificate chain\n");
 804                         for (i=0; i<sk_X509_num(sk); i++)
 805                                 {
 806                                 X509_NAME_oneline(X509_get_subject_name(
 807                                         sk_X509_value(sk,i)),buf,BUFSIZ);
 808                                 BIO_printf(bio,"%2d s:%s\n",i,buf);
 809                                 X509_NAME_oneline(X509_get_issuer_name(
 810                                         sk_X509_value(sk,i)),buf,BUFSIZ);
 811                                 BIO_printf(bio,"   i:%s\n",buf);
 812                                 if (c_showcerts)
 813                                         PEM_write_bio_X509(bio,sk_X509_value(sk,i));
 814                                 }
 815                         }
 816
 817                 BIO_printf(bio,"---\n");
 818                 peer=SSL_get_peer_certificate(s);
 819                 if (peer != NULL)
 820                         {
 821                         BIO_printf(bio,"Server certificate\n");
 822                         if (!(c_showcerts && got_a_chain)) /* Redundant if we showed the whole chain */
 823                                 PEM_write_bio_X509(bio,peer);
 824                         X509_NAME_oneline(X509_get_subject_name(peer),
 825                                 buf,BUFSIZ);
 826                         BIO_printf(bio,"subject=%s\n",buf);
 827                         X509_NAME_oneline(X509_get_issuer_name(peer),
 828                                 buf,BUFSIZ);
 829                         BIO_printf(bio,"issuer=%s\n",buf);
 830                         }
 831                 else
 832                         BIO_printf(bio,"no peer certificate available\n");
 833
 834                 sk2=SSL_get_client_CA_list(s);
 835                 if ((sk2 != NULL) && (sk_X509_NAME_num(sk2) > 0))
 836                         {
 837                         BIO_printf(bio,"---\nAcceptable client certificate CA names\n");
 838                         for (i=0; i<sk_X509_NAME_num(sk2); i++)
 839                                 {
 840                                 xn=sk_X509_NAME_value(sk2,i);
 841                                 X509_NAME_oneline(xn,buf,sizeof(buf));
 842                                 BIO_write(bio,buf,strlen(buf));
 843                                 BIO_write(bio,"\n",1);
 844                                 }
 845                         }
 846                 else
 847                         {
 848                         BIO_printf(bio,"---\nNo client certificate CA names sent\n");
 849                         }
 850                 p=SSL_get_shared_ciphers(s,buf,BUFSIZ);
 851                 if (p != NULL)
 852                         {
 853                         /* This works only for SSL 2.  In later protocol
 854                          * versions, the client does not know what other
 855                          * ciphers (in addition to the one to be used
 856                          * in the current connection) the server supports. */
 857
 858                         BIO_printf(bio,"---\nCiphers common between both SSL endpoints:\n");
 859                         j=i=0;
 860                         while (*p)
 861                                 {
 862                                 if (*p == ':')
 863                                         {
 864                                         BIO_write(bio,space,15-j%25);
 865                                         i++;
 866                                         j=0;
 867                                         BIO_write(bio,((i%3)?" ":"\n"),1);
 868                                         }
 869                                 else
 870                                         {
 871                                         BIO_write(bio,p,1);
 872                                         j++;
 873                                         }
 874                                 p++;
 875                                 }
 876                         BIO_write(bio,"\n",1);
 877                         }
 878
 879                 BIO_printf(bio,"---\nSSL handshake has read %ld bytes and written %ld bytes\n",
 880                         BIO_number_read(SSL_get_rbio(s)),
 881                         BIO_number_written(SSL_get_wbio(s)));
 882                 }
 883         BIO_printf(bio,((s->hit)?"---\nReused, ":"---\nNew, "));
 884         c=SSL_get_current_cipher(s);
 885         BIO_printf(bio,"%s, Cipher is %s\n",
 886                 SSL_CIPHER_get_version(c),
 887                 SSL_CIPHER_get_name(c));
 888         if (peer != NULL) {
 889                 EVP_PKEY *pktmp;
 890                 pktmp = X509_get_pubkey(peer);
 891                 BIO_printf(bio,"Server public key is %d bit\n",
 892                                                          EVP_PKEY_bits(pktmp));
 893                 EVP_PKEY_free(pktmp);
 894         }
 895         SSL_SESSION_print(bio,SSL_get_session(s));
 896         BIO_printf(bio,"---\n");
 897         if (peer != NULL)
 898                 X509_free(peer);
 899         /* flush, or debugging output gets mixed with http response */
 900         BIO_flush(bio);
 901         }
 902