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 #include <openssl/e_os2.h>
  64 #ifdef OPENSSL_NO_STDIO
  65 #define APPS_WIN16
  66 #endif
  67
  68 /* With IPv6, it looks like Digital has mixed up the proper order of
  69    recursive header file inclusion, resulting in the compiler complaining
  70    that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
  71    is needed to have fileno() declared correctly...  So let's define u_int */
  72 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
  73 #define __U_INT
  74 typedef unsigned int u_int;
  75 #endif
  76
  77 #define USE_SOCKETS
  78 #include "apps.h"
  79 #include <openssl/x509.h>
  80 #include <openssl/ssl.h>
  81 #include <openssl/err.h>
  82 #include <openssl/pem.h>
  83 #include <openssl/engine.h>
  84 #include "s_apps.h"
  85
  86 #ifdef OPENSSL_SYS_WINDOWS
  87 #include <conio.h>
  88 #endif
  89
  90
  91 #if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)
  92 /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
  93 #undef FIONBIO
  94 #endif
  95
  96 #undef PROG
  97 #define PROG    s_client_main
  98
  99 /*#define SSL_HOST_NAME "www.netscape.com" */
 100 /*#define SSL_HOST_NAME "193.118.187.102" */
 101 #define SSL_HOST_NAME   "localhost"
 102
 103 /*#define TEST_CERT "client.pem" */ /* no default cert. */
 104
 105 #undef BUFSIZZ
 106 #define BUFSIZZ 1024*8
 107
 108 extern int verify_depth;
 109 extern int verify_error;
 110
 111 #ifdef FIONBIO
 112 static int c_nbio=0;
 113 #endif
 114 static int c_Pause=0;
 115 static int c_debug=0;
 116 static int c_showcerts=0;
 117
 118 static void sc_usage(void);
 119 static void print_stuff(BIO *berr,SSL *con,int full);
 120 static BIO *bio_c_out=NULL;
 121 static int c_quiet=0;
 122 static int c_ign_eof=0;
 123
 124 static void sc_usage(void)
 125         {
 126         BIO_printf(bio_err,"usage: s_client args\n");
 127         BIO_printf(bio_err,"\n");
 128         BIO_printf(bio_err," -host host     - use -connect instead\n");
 129         BIO_printf(bio_err," -port port     - use -connect instead\n");
 130         BIO_printf(bio_err," -connect host:port - who to connect to (default is %s:%s)\n",SSL_HOST_NAME,PORT_STR);
 131
 132         BIO_printf(bio_err," -verify arg   - turn on peer certificate verification\n");
 133         BIO_printf(bio_err," -cert arg     - certificate file to use, PEM format assumed\n");
 134         BIO_printf(bio_err," -key arg      - Private key file to use, PEM format assumed, in cert file if\n");
 135         BIO_printf(bio_err,"                 not specified but cert file is.\n");
 136         BIO_printf(bio_err," -CApath arg   - PEM format directory of CA's\n");
 137         BIO_printf(bio_err," -CAfile arg   - PEM format file of CA's\n");
 138         BIO_printf(bio_err," -reconnect    - Drop and re-make the connection with the same Session-ID\n");
 139         BIO_printf(bio_err," -pause        - sleep(1) after each read(2) and write(2) system call\n");
 140         BIO_printf(bio_err," -showcerts    - show all certificates in the chain\n");
 141         BIO_printf(bio_err," -debug        - extra output\n");
 142         BIO_printf(bio_err," -nbio_test    - more ssl protocol testing\n");
 143         BIO_printf(bio_err," -state        - print the 'ssl' states\n");
 144 #ifdef FIONBIO
 145         BIO_printf(bio_err," -nbio         - Run with non-blocking IO\n");
 146 #endif
 147         BIO_printf(bio_err," -crlf         - convert LF from terminal into CRLF\n");
 148         BIO_printf(bio_err," -quiet        - no s_client output\n");
 149         BIO_printf(bio_err," -ign_eof      - ignore input eof (default when -quiet)\n");
 150         BIO_printf(bio_err," -ssl2         - just use SSLv2\n");
 151         BIO_printf(bio_err," -ssl3         - just use SSLv3\n");
 152         BIO_printf(bio_err," -tls1         - just use TLSv1\n");
 153         BIO_printf(bio_err," -no_tls1/-no_ssl3/-no_ssl2 - turn off that protocol\n");
 154         BIO_printf(bio_err," -bugs         - Switch on all SSL implementation bug workarounds\n");
 155         BIO_printf(bio_err," -serverpref   - Use server's cipher preferences (only SSLv2)\n");
 156         BIO_printf(bio_err," -cipher       - preferred cipher to use, use the 'openssl ciphers'\n");
 157         BIO_printf(bio_err,"                 command to see what is available\n");
 158         BIO_printf(bio_err," -engine id    - Initialise and use the specified engine\n");
 159         BIO_printf(bio_err," -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR, LIST_SEPARATOR_CHAR);
 160
 161         }
 162
 163 int MAIN(int, char **);
 164
 165 int MAIN(int argc, char **argv)
 166         {
 167         int off=0;
 168         SSL *con=NULL,*con2=NULL;
 169         X509_STORE *store = NULL;
 170         int s,k,width,state=0;
 171         char *cbuf=NULL,*sbuf=NULL;
 172         int cbuf_len,cbuf_off;
 173         int sbuf_len,sbuf_off;
 174         fd_set readfds,writefds;
 175         short port=PORT;
 176         int full_log=1;
 177         char *host=SSL_HOST_NAME;
 178         char *cert_file=NULL,*key_file=NULL;
 179         char *CApath=NULL,*CAfile=NULL,*cipher=NULL;
 180         int reconnect=0,badop=0,verify=SSL_VERIFY_NONE,bugs=0;
 181         int crlf=0;
 182         int write_tty,read_tty,write_ssl,read_ssl,tty_on,ssl_pending;
 183         SSL_CTX *ctx=NULL;
 184         int ret=1,in_init=1,i,nbio_test=0;
 185         int prexit = 0, vflags = 0;
 186         SSL_METHOD *meth=NULL;
 187         BIO *sbio;
 188         char *inrand=NULL;
 189         char *engine_id=NULL;
 190         ENGINE *e=NULL;
 191 #ifdef OPENSSL_SYS_WINDOWS
 192         struct timeval tv;
 193 #endif
 194
 195 #if !defined(OPENSSL_NO_SSL2) && !defined(OPENSSL_NO_SSL3)
 196         meth=SSLv23_client_method();
 197 #elif !defined(OPENSSL_NO_SSL3)
 198         meth=SSLv3_client_method();
 199 #elif !defined(OPENSSL_NO_SSL2)
 200         meth=SSLv2_client_method();
 201 #endif
 202
 203         apps_startup();
 204         c_Pause=0;
 205         c_quiet=0;
 206         c_ign_eof=0;
 207         c_debug=0;
 208         c_showcerts=0;
 209
 210         if (bio_err == NULL)
 211                 bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
 212
 213         if (    ((cbuf=OPENSSL_malloc(BUFSIZZ)) == NULL) ||
 214                 ((sbuf=OPENSSL_malloc(BUFSIZZ)) == NULL))
 215                 {
 216                 BIO_printf(bio_err,"out of memory\n");
 217                 goto end;
 218                 }
 219
 220         verify_depth=0;
 221         verify_error=X509_V_OK;
 222 #ifdef FIONBIO
 223         c_nbio=0;
 224 #endif
 225
 226         argc--;
 227         argv++;
 228         while (argc >= 1)
 229                 {
 230                 if      (strcmp(*argv,"-host") == 0)
 231                         {
 232                         if (--argc < 1) goto bad;
 233                         host= *(++argv);
 234                         }
 235                 else if (strcmp(*argv,"-port") == 0)
 236                         {
 237                         if (--argc < 1) goto bad;
 238                         port=atoi(*(++argv));
 239                         if (port == 0) goto bad;
 240                         }
 241                 else if (strcmp(*argv,"-connect") == 0)
 242                         {
 243                         if (--argc < 1) goto bad;
 244                         if (!extract_host_port(*(++argv),&host,NULL,&port))
 245                                 goto bad;
 246                         }
 247                 else if (strcmp(*argv,"-verify") == 0)
 248                         {
 249                         verify=SSL_VERIFY_PEER;
 250                         if (--argc < 1) goto bad;
 251                         verify_depth=atoi(*(++argv));
 252                         BIO_printf(bio_err,"verify depth is %d\n",verify_depth);
 253                         }
 254                 else if (strcmp(*argv,"-cert") == 0)
 255                         {
 256                         if (--argc < 1) goto bad;
 257                         cert_file= *(++argv);
 258                         }
 259                 else if (strcmp(*argv,"-crl_check") == 0)
 260                         vflags |= X509_V_FLAG_CRL_CHECK;
 261                 else if (strcmp(*argv,"-crl_check_all") == 0)
 262                         vflags |= X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL;
 263                 else if (strcmp(*argv,"-prexit") == 0)
 264                         prexit=1;
 265                 else if (strcmp(*argv,"-crlf") == 0)
 266                         crlf=1;
 267                 else if (strcmp(*argv,"-quiet") == 0)
 268                         {
 269                         c_quiet=1;
 270                         c_ign_eof=1;
 271                         }
 272                 else if (strcmp(*argv,"-ign_eof") == 0)
 273                         c_ign_eof=1;
 274                 else if (strcmp(*argv,"-pause") == 0)
 275                         c_Pause=1;
 276                 else if (strcmp(*argv,"-debug") == 0)
 277                         c_debug=1;
 278                 else if (strcmp(*argv,"-showcerts") == 0)
 279                         c_showcerts=1;
 280                 else if (strcmp(*argv,"-nbio_test") == 0)
 281                         nbio_test=1;
 282                 else if (strcmp(*argv,"-state") == 0)
 283                         state=1;
 284 #ifndef OPENSSL_NO_SSL2
 285                 else if (strcmp(*argv,"-ssl2") == 0)
 286                         meth=SSLv2_client_method();
 287 #endif
 288 #ifndef OPENSSL_NO_SSL3
 289                 else if (strcmp(*argv,"-ssl3") == 0)
 290                         meth=SSLv3_client_method();
 291 #endif
 292 #ifndef OPENSSL_NO_TLS1
 293                 else if (strcmp(*argv,"-tls1") == 0)
 294                         meth=TLSv1_client_method();
 295 #endif
 296                 else if (strcmp(*argv,"-bugs") == 0)
 297                         bugs=1;
 298                 else if (strcmp(*argv,"-key") == 0)
 299                         {
 300                         if (--argc < 1) goto bad;
 301                         key_file= *(++argv);
 302                         }
 303                 else if (strcmp(*argv,"-reconnect") == 0)
 304                         {
 305                         reconnect=5;
 306                         }
 307                 else if (strcmp(*argv,"-CApath") == 0)
 308                         {
 309                         if (--argc < 1) goto bad;
 310                         CApath= *(++argv);
 311                         }
 312                 else if (strcmp(*argv,"-CAfile") == 0)
 313                         {
 314                         if (--argc < 1) goto bad;
 315                         CAfile= *(++argv);
 316                         }
 317                 else if (strcmp(*argv,"-no_tls1") == 0)
 318                         off|=SSL_OP_NO_TLSv1;
 319                 else if (strcmp(*argv,"-no_ssl3") == 0)
 320                         off|=SSL_OP_NO_SSLv3;
 321                 else if (strcmp(*argv,"-no_ssl2") == 0)
 322                         off|=SSL_OP_NO_SSLv2;
 323                 else if (strcmp(*argv,"-serverpref") == 0)
 324                         off|=SSL_OP_CIPHER_SERVER_PREFERENCE;
 325                 else if (strcmp(*argv,"-cipher") == 0)
 326                         {
 327                         if (--argc < 1) goto bad;
 328                         cipher= *(++argv);
 329                         }
 330 #ifdef FIONBIO
 331                 else if (strcmp(*argv,"-nbio") == 0)
 332                         { c_nbio=1; }
 333 #endif
 334                 else if (strcmp(*argv,"-engine") == 0)
 335                         {
 336                         if (--argc < 1) goto bad;
 337                         engine_id = *(++argv);
 338                         }
 339                 else if (strcmp(*argv,"-rand") == 0)
 340                         {
 341                         if (--argc < 1) goto bad;
 342                         inrand= *(++argv);
 343                         }
 344                 else
 345                         {
 346                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 347                         badop=1;
 348                         break;
 349                         }
 350                 argc--;
 351                 argv++;
 352                 }
 353         if (badop)
 354                 {
 355 bad:
 356                 sc_usage();
 357                 goto end;
 358                 }
 359
 360         if (!app_RAND_load_file(NULL, bio_err, 1) && inrand == NULL
 361                 && !RAND_status())
 362                 {
 363                 BIO_printf(bio_err,"warning, not much extra random data, consider using the -rand option\n");
 364                 }
 365         if (inrand != NULL)
 366                 BIO_printf(bio_err,"%ld semi-random bytes loaded\n",
 367                         app_RAND_load_files(inrand));
 368
 369         if (bio_c_out == NULL)
 370                 {
 371                 if (c_quiet)
 372                         {
 373                         bio_c_out=BIO_new(BIO_s_null());
 374                         }
 375                 else
 376                         {
 377                         if (bio_c_out == NULL)
 378                                 bio_c_out=BIO_new_fp(stdout,BIO_NOCLOSE);
 379                         }
 380                 }
 381
 382         OpenSSL_add_ssl_algorithms();
 383         SSL_load_error_strings();
 384
 385         if (engine_id != NULL)
 386                 {
 387                 if((e = ENGINE_by_id(engine_id)) == NULL)
 388                         {
 389                         BIO_printf(bio_err,"invalid engine\n");
 390                         ERR_print_errors(bio_err);
 391                         goto end;
 392                         }
 393                 if (c_debug)
 394                         {
 395                         ENGINE_ctrl(e, ENGINE_CTRL_SET_LOGSTREAM,
 396                                 0, bio_err, 0);
 397                         }
 398                 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL))
 399                         {
 400                         BIO_printf(bio_err,"can't use that engine\n");
 401                         ERR_print_errors(bio_err);
 402                         goto end;
 403                         }
 404                 BIO_printf(bio_err,"engine \"%s\" set.\n", engine_id);
 405                 ENGINE_free(e);
 406                 }
 407
 408         ctx=SSL_CTX_new(meth);
 409         if (ctx == NULL)
 410                 {
 411                 ERR_print_errors(bio_err);
 412                 goto end;
 413                 }
 414
 415         if (bugs)
 416                 SSL_CTX_set_options(ctx,SSL_OP_ALL|off);
 417         else
 418                 SSL_CTX_set_options(ctx,off);
 419
 420         if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);
 421         if (cipher != NULL)
 422                 if(!SSL_CTX_set_cipher_list(ctx,cipher)) {
 423                 BIO_printf(bio_err,"error setting cipher list\n");
 424                 ERR_print_errors(bio_err);
 425                 goto end;
 426         }
 427 #if 0
 428         else
 429                 SSL_CTX_set_cipher_list(ctx,getenv("SSL_CIPHER"));
 430 #endif
 431
 432         SSL_CTX_set_verify(ctx,verify,verify_callback);
 433         if (!set_cert_stuff(ctx,cert_file,key_file))
 434                 goto end;
 435
 436         if ((!SSL_CTX_load_verify_locations(ctx,CAfile,CApath)) ||
 437                 (!SSL_CTX_set_default_verify_paths(ctx)))
 438                 {
 439                 /* BIO_printf(bio_err,"error setting default verify locations\n"); */
 440                 ERR_print_errors(bio_err);
 441                 /* goto end; */
 442                 }
 443
 444         store = SSL_CTX_get_cert_store(ctx);
 445         X509_STORE_set_flags(store, vflags);
 446
 447         con=SSL_new(ctx);
 448 #ifndef OPENSSL_NO_KRB5
 449         if (con  &&  (con->kssl_ctx = kssl_ctx_new()) != NULL)
 450                 {
 451                 kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVER, host);
 452                 }
 453 #endif  /* OPENSSL_NO_KRB5  */
 454 /*      SSL_set_cipher_list(con,"RC4-MD5"); */
 455
 456 re_start:
 457
 458         if (init_client(&s,host,port) == 0)
 459                 {
 460                 BIO_printf(bio_err,"connect:errno=%d\n",get_last_socket_error());
 461                 SHUTDOWN(s);
 462                 goto end;
 463                 }
 464         BIO_printf(bio_c_out,"CONNECTED(%08X)\n",s);
 465
 466 #ifdef FIONBIO
 467         if (c_nbio)
 468                 {
 469                 unsigned long l=1;
 470                 BIO_printf(bio_c_out,"turning on non blocking io\n");
 471                 if (BIO_socket_ioctl(s,FIONBIO,&l) < 0)
 472                         {
 473                         ERR_print_errors(bio_err);
 474                         goto end;
 475                         }
 476                 }
 477 #endif
 478         if (c_Pause & 0x01) con->debug=1;
 479         sbio=BIO_new_socket(s,BIO_NOCLOSE);
 480
 481         if (nbio_test)
 482                 {
 483                 BIO *test;
 484
 485                 test=BIO_new(BIO_f_nbio_test());
 486                 sbio=BIO_push(test,sbio);
 487                 }
 488
 489         if (c_debug)
 490                 {
 491                 con->debug=1;
 492                 BIO_set_callback(sbio,bio_dump_cb);
 493                 BIO_set_callback_arg(sbio,bio_c_out);
 494                 }
 495
 496         SSL_set_bio(con,sbio,sbio);
 497         SSL_set_connect_state(con);
 498
 499         /* ok, lets connect */
 500         width=SSL_get_fd(con)+1;
 501
 502         read_tty=1;
 503         write_tty=0;
 504         tty_on=0;
 505         read_ssl=1;
 506         write_ssl=1;
 507
 508         cbuf_len=0;
 509         cbuf_off=0;
 510         sbuf_len=0;
 511         sbuf_off=0;
 512
 513         for (;;)
 514                 {
 515                 FD_ZERO(&readfds);
 516                 FD_ZERO(&writefds);
 517
 518                 if (SSL_in_init(con) && !SSL_total_renegotiations(con))
 519                         {
 520                         in_init=1;
 521                         tty_on=0;
 522                         }
 523                 else
 524                         {
 525                         tty_on=1;
 526                         if (in_init)
 527                                 {
 528                                 in_init=0;
 529                                 print_stuff(bio_c_out,con,full_log);
 530                                 if (full_log > 0) full_log--;
 531
 532                                 if (reconnect)
 533                                         {
 534                                         reconnect--;
 535                                         BIO_printf(bio_c_out,"drop connection and then reconnect\n");
 536                                         SSL_shutdown(con);
 537                                         SSL_set_connect_state(con);
 538                                         SHUTDOWN(SSL_get_fd(con));
 539                                         goto re_start;
 540                                         }
 541                                 }
 542                         }
 543
 544                 ssl_pending = read_ssl && SSL_pending(con);
 545
 546                 if (!ssl_pending)
 547                         {
 548 #ifndef OPENSSL_SYS_WINDOWS
 549                         if (tty_on)
 550                                 {
 551                                 if (read_tty)  FD_SET(fileno(stdin),&readfds);
 552                                 if (write_tty) FD_SET(fileno(stdout),&writefds);
 553                                 }
 554                         if (read_ssl)
 555                                 FD_SET(SSL_get_fd(con),&readfds);
 556                         if (write_ssl)
 557                                 FD_SET(SSL_get_fd(con),&writefds);
 558 #else
 559                         if(!tty_on || !write_tty) {
 560                                 if (read_ssl)
 561                                         FD_SET(SSL_get_fd(con),&readfds);
 562                                 if (write_ssl)
 563                                         FD_SET(SSL_get_fd(con),&writefds);
 564                         }
 565 #endif
 566 /*                      printf("mode tty(%d %d%d) ssl(%d%d)\n",
 567                                 tty_on,read_tty,write_tty,read_ssl,write_ssl);*/
 568
 569                         /* Note: under VMS with SOCKETSHR the second parameter
 570                          * is currently of type (int *) whereas under other
 571                          * systems it is (void *) if you don't have a cast it
 572                          * will choke the compiler: if you do have a cast then
 573                          * you can either go for (int *) or (void *).
 574                          */
 575 #ifdef OPENSSL_SYS_WINDOWS
 576                         /* Under Windows we make the assumption that we can
 577                          * always write to the tty: therefore if we need to
 578                          * write to the tty we just fall through. Otherwise
 579                          * we timeout the select every second and see if there
 580                          * are any keypresses. Note: this is a hack, in a proper
 581                          * Windows application we wouldn't do this.
 582                          */
 583                         i=0;
 584                         if(!write_tty) {
 585                                 if(read_tty) {
 586                                         tv.tv_sec = 1;
 587                                         tv.tv_usec = 0;
 588                                         i=select(width,(void *)&readfds,(void *)&writefds,
 589                                                  NULL,&tv);
 590                                         if(!i && (!((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0))) || !read_tty) ) continue;
 591                                 } else  i=select(width,(void *)&readfds,(void *)&writefds,
 592                                          NULL,NULL);
 593                         }
 594 #else
 595                         i=select(width,(void *)&readfds,(void *)&writefds,
 596                                  NULL,NULL);
 597 #endif
 598                         if ( i < 0)
 599                                 {
 600                                 BIO_printf(bio_err,"bad select %d\n",
 601                                 get_last_socket_error());
 602                                 goto shut;
 603                                 /* goto end; */
 604                                 }
 605                         }
 606
 607                 if (!ssl_pending && FD_ISSET(SSL_get_fd(con),&writefds))
 608                         {
 609                         k=SSL_write(con,&(cbuf[cbuf_off]),
 610                                 (unsigned int)cbuf_len);
 611                         switch (SSL_get_error(con,k))
 612                                 {
 613                         case SSL_ERROR_NONE:
 614                                 cbuf_off+=k;
 615                                 cbuf_len-=k;
 616                                 if (k <= 0) goto end;
 617                                 /* we have done a  write(con,NULL,0); */
 618                                 if (cbuf_len <= 0)
 619                                         {
 620                                         read_tty=1;
 621                                         write_ssl=0;
 622                                         }
 623                                 else /* if (cbuf_len > 0) */
 624                                         {
 625                                         read_tty=0;
 626                                         write_ssl=1;
 627                                         }
 628                                 break;
 629                         case SSL_ERROR_WANT_WRITE:
 630                                 BIO_printf(bio_c_out,"write W BLOCK\n");
 631                                 write_ssl=1;
 632                                 read_tty=0;
 633                                 break;
 634                         case SSL_ERROR_WANT_READ:
 635                                 BIO_printf(bio_c_out,"write R BLOCK\n");
 636                                 write_tty=0;
 637                                 read_ssl=1;
 638                                 write_ssl=0;
 639                                 break;
 640                         case SSL_ERROR_WANT_X509_LOOKUP:
 641                                 BIO_printf(bio_c_out,"write X BLOCK\n");
 642                                 break;
 643                         case SSL_ERROR_ZERO_RETURN:
 644                                 if (cbuf_len != 0)
 645                                         {
 646                                         BIO_printf(bio_c_out,"shutdown\n");
 647                                         goto shut;
 648                                         }
 649                                 else
 650                                         {
 651                                         read_tty=1;
 652                                         write_ssl=0;
 653                                         break;
 654                                         }
 655
 656                         case SSL_ERROR_SYSCALL:
 657                                 if ((k != 0) || (cbuf_len != 0))
 658                                         {
 659                                         BIO_printf(bio_err,"write:errno=%d\n",
 660                                                 get_last_socket_error());
 661                                         goto shut;
 662                                         }
 663                                 else
 664                                         {
 665                                         read_tty=1;
 666                                         write_ssl=0;
 667                                         }
 668                                 break;
 669                         case SSL_ERROR_SSL:
 670                                 ERR_print_errors(bio_err);
 671                                 goto shut;
 672                                 }
 673                         }
 674 #ifdef OPENSSL_SYS_WINDOWS
 675                 /* Assume Windows can always write */
 676                 else if (!ssl_pending && write_tty)
 677 #else
 678                 else if (!ssl_pending && FD_ISSET(fileno(stdout),&writefds))
 679 #endif
 680                         {
 681 #ifdef CHARSET_EBCDIC
 682                         ascii2ebcdic(&(sbuf[sbuf_off]),&(sbuf[sbuf_off]),sbuf_len);
 683 #endif
 684                         i=write(fileno(stdout),&(sbuf[sbuf_off]),sbuf_len);
 685
 686                         if (i <= 0)
 687                                 {
 688                                 BIO_printf(bio_c_out,"DONE\n");
 689                                 goto shut;
 690                                 /* goto end; */
 691                                 }
 692
 693                         sbuf_len-=i;;
 694                         sbuf_off+=i;
 695                         if (sbuf_len <= 0)
 696                                 {
 697                                 read_ssl=1;
 698                                 write_tty=0;
 699                                 }
 700                         }
 701                 else if (ssl_pending || FD_ISSET(SSL_get_fd(con),&readfds))
 702                         {
 703 #ifdef RENEG
 704 { static int iiii; if (++iiii == 52) { SSL_renegotiate(con); iiii=0; } }
 705 #endif
 706 #if 1
 707                         k=SSL_read(con,sbuf,1024 /* BUFSIZZ */ );
 708 #else
 709 /* Demo for pending and peek :-) */
 710                         k=SSL_read(con,sbuf,16);
 711 { char zbuf[10240];
 712 printf("read=%d pending=%d peek=%d\n",k,SSL_pending(con),SSL_peek(con,zbuf,10240));
 713 }
 714 #endif
 715
 716                         switch (SSL_get_error(con,k))
 717                                 {
 718                         case SSL_ERROR_NONE:
 719                                 if (k <= 0)
 720                                         goto end;
 721                                 sbuf_off=0;
 722                                 sbuf_len=k;
 723
 724                                 read_ssl=0;
 725                                 write_tty=1;
 726                                 break;
 727                         case SSL_ERROR_WANT_WRITE:
 728                                 BIO_printf(bio_c_out,"read W BLOCK\n");
 729                                 write_ssl=1;
 730                                 read_tty=0;
 731                                 break;
 732                         case SSL_ERROR_WANT_READ:
 733                                 BIO_printf(bio_c_out,"read R BLOCK\n");
 734                                 write_tty=0;
 735                                 read_ssl=1;
 736                                 if ((read_tty == 0) && (write_ssl == 0))
 737                                         write_ssl=1;
 738                                 break;
 739                         case SSL_ERROR_WANT_X509_LOOKUP:
 740                                 BIO_printf(bio_c_out,"read X BLOCK\n");
 741                                 break;
 742                         case SSL_ERROR_SYSCALL:
 743                                 BIO_printf(bio_err,"read:errno=%d\n",get_last_socket_error());
 744                                 goto shut;
 745                         case SSL_ERROR_ZERO_RETURN:
 746                                 BIO_printf(bio_c_out,"closed\n");
 747                                 goto shut;
 748                         case SSL_ERROR_SSL:
 749                                 ERR_print_errors(bio_err);
 750                                 goto shut;
 751                                 /* break; */
 752                                 }
 753                         }
 754
 755 #ifdef OPENSSL_SYS_WINDOWS
 756                 else if ((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0)))
 757 #else
 758                 else if (FD_ISSET(fileno(stdin),&readfds))
 759 #endif
 760                         {
 761                         if (crlf)
 762                                 {
 763                                 int j, lf_num;
 764
 765                                 i=read(fileno(stdin),cbuf,BUFSIZZ/2);
 766                                 lf_num = 0;
 767                                 /* both loops are skipped when i <= 0 */
 768                                 for (j = 0; j < i; j++)
 769                                         if (cbuf[j] == '\n')
 770                                                 lf_num++;
 771                                 for (j = i-1; j >= 0; j--)
 772                                         {
 773                                         cbuf[j+lf_num] = cbuf[j];
 774                                         if (cbuf[j] == '\n')
 775                                                 {
 776                                                 lf_num--;
 777                                                 i++;
 778                                                 cbuf[j+lf_num] = '\r';
 779                                                 }
 780                                         }
 781                                 assert(lf_num == 0);
 782                                 }
 783                         else
 784                                 i=read(fileno(stdin),cbuf,BUFSIZZ);
 785
 786                         if ((!c_ign_eof) && ((i <= 0) || (cbuf[0] == 'Q')))
 787                                 {
 788                                 BIO_printf(bio_err,"DONE\n");
 789                                 goto shut;
 790                                 }
 791
 792                         if ((!c_ign_eof) && (cbuf[0] == 'R'))
 793                                 {
 794                                 BIO_printf(bio_err,"RENEGOTIATING\n");
 795                                 SSL_renegotiate(con);
 796                                 cbuf_len=0;
 797                                 }
 798                         else
 799                                 {
 800                                 cbuf_len=i;
 801                                 cbuf_off=0;
 802 #ifdef CHARSET_EBCDIC
 803                                 ebcdic2ascii(cbuf, cbuf, i);
 804 #endif
 805                                 }
 806
 807                         write_ssl=1;
 808                         read_tty=0;
 809                         }
 810                 }
 811 shut:
 812         SSL_shutdown(con);
 813         SHUTDOWN(SSL_get_fd(con));
 814         ret=0;
 815 end:
 816         if(prexit) print_stuff(bio_c_out,con,1);
 817         if (con != NULL) SSL_free(con);
 818         if (con2 != NULL) SSL_free(con2);
 819         if (ctx != NULL) SSL_CTX_free(ctx);
 820         if (cbuf != NULL) { memset(cbuf,0,BUFSIZZ); OPENSSL_free(cbuf); }
 821         if (sbuf != NULL) { memset(sbuf,0,BUFSIZZ); OPENSSL_free(sbuf); }
 822         if (bio_c_out != NULL)
 823                 {
 824                 BIO_free(bio_c_out);
 825                 bio_c_out=NULL;
 826                 }
 827         EXIT(ret);
 828         }
 829
 830
 831 static void print_stuff(BIO *bio, SSL *s, int full)
 832         {
 833         X509 *peer=NULL;
 834         char *p;
 835         static char *space="                ";
 836         char buf[BUFSIZ];
 837         STACK_OF(X509) *sk;
 838         STACK_OF(X509_NAME) *sk2;
 839         SSL_CIPHER *c;
 840         X509_NAME *xn;
 841         int j,i;
 842
 843         if (full)
 844                 {
 845                 int got_a_chain = 0;
 846
 847                 sk=SSL_get_peer_cert_chain(s);
 848                 if (sk != NULL)
 849                         {
 850                         got_a_chain = 1; /* we don't have it for SSL2 (yet) */
 851
 852                         BIO_printf(bio,"---\nCertificate chain\n");
 853                         for (i=0; i<sk_X509_num(sk); i++)
 854                                 {
 855                                 X509_NAME_oneline(X509_get_subject_name(
 856                                         sk_X509_value(sk,i)),buf,BUFSIZ);
 857                                 BIO_printf(bio,"%2d s:%s\n",i,buf);
 858                                 X509_NAME_oneline(X509_get_issuer_name(
 859                                         sk_X509_value(sk,i)),buf,BUFSIZ);
 860                                 BIO_printf(bio,"   i:%s\n",buf);
 861                                 if (c_showcerts)
 862                                         PEM_write_bio_X509(bio,sk_X509_value(sk,i));
 863                                 }
 864                         }
 865
 866                 BIO_printf(bio,"---\n");
 867                 peer=SSL_get_peer_certificate(s);
 868                 if (peer != NULL)
 869                         {
 870                         BIO_printf(bio,"Server certificate\n");
 871                         if (!(c_showcerts && got_a_chain)) /* Redundant if we showed the whole chain */
 872                                 PEM_write_bio_X509(bio,peer);
 873                         X509_NAME_oneline(X509_get_subject_name(peer),
 874                                 buf,BUFSIZ);
 875                         BIO_printf(bio,"subject=%s\n",buf);
 876                         X509_NAME_oneline(X509_get_issuer_name(peer),
 877                                 buf,BUFSIZ);
 878                         BIO_printf(bio,"issuer=%s\n",buf);
 879                         }
 880                 else
 881                         BIO_printf(bio,"no peer certificate available\n");
 882
 883                 sk2=SSL_get_client_CA_list(s);
 884                 if ((sk2 != NULL) && (sk_X509_NAME_num(sk2) > 0))
 885                         {
 886                         BIO_printf(bio,"---\nAcceptable client certificate CA names\n");
 887                         for (i=0; i<sk_X509_NAME_num(sk2); i++)
 888                                 {
 889                                 xn=sk_X509_NAME_value(sk2,i);
 890                                 X509_NAME_oneline(xn,buf,sizeof(buf));
 891                                 BIO_write(bio,buf,strlen(buf));
 892                                 BIO_write(bio,"\n",1);
 893                                 }
 894                         }
 895                 else
 896                         {
 897                         BIO_printf(bio,"---\nNo client certificate CA names sent\n");
 898                         }
 899                 p=SSL_get_shared_ciphers(s,buf,BUFSIZ);
 900                 if (p != NULL)
 901                         {
 902                         /* This works only for SSL 2.  In later protocol
 903                          * versions, the client does not know what other
 904                          * ciphers (in addition to the one to be used
 905                          * in the current connection) the server supports. */
 906
 907                         BIO_printf(bio,"---\nCiphers common between both SSL endpoints:\n");
 908                         j=i=0;
 909                         while (*p)
 910                                 {
 911                                 if (*p == ':')
 912                                         {
 913                                         BIO_write(bio,space,15-j%25);
 914                                         i++;
 915                                         j=0;
 916                                         BIO_write(bio,((i%3)?" ":"\n"),1);
 917                                         }
 918                                 else
 919                                         {
 920                                         BIO_write(bio,p,1);
 921                                         j++;
 922                                         }
 923                                 p++;
 924                                 }
 925                         BIO_write(bio,"\n",1);
 926                         }
 927
 928                 BIO_printf(bio,"---\nSSL handshake has read %ld bytes and written %ld bytes\n",
 929                         BIO_number_read(SSL_get_rbio(s)),
 930                         BIO_number_written(SSL_get_wbio(s)));
 931                 }
 932         BIO_printf(bio,((s->hit)?"---\nReused, ":"---\nNew, "));
 933         c=SSL_get_current_cipher(s);
 934         BIO_printf(bio,"%s, Cipher is %s\n",
 935                 SSL_CIPHER_get_version(c),
 936                 SSL_CIPHER_get_name(c));
 937         if (peer != NULL) {
 938                 EVP_PKEY *pktmp;
 939                 pktmp = X509_get_pubkey(peer);
 940                 BIO_printf(bio,"Server public key is %d bit\n",
 941                                                          EVP_PKEY_bits(pktmp));
 942                 EVP_PKEY_free(pktmp);
 943         }
 944         SSL_SESSION_print(bio,SSL_get_session(s));
 945         BIO_printf(bio,"---\n");
 946         if (peer != NULL)
 947                 X509_free(peer);
 948         }
 949