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/engine.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," -serverpref   - Use server's cipher preferences (only SSLv2)\n");
 155         BIO_printf(bio_err," -cipher       - preferred cipher to use, use the 'openssl ciphers'\n");
 156         BIO_printf(bio_err,"                 command to see what is available\n");
 157         BIO_printf(bio_err," -engine id    - Initialise and use the specified engine\n");
 158
 159         }
 160
 161 int MAIN(int, char **);
 162
 163 int MAIN(int argc, char **argv)
 164         {
 165         int off=0;
 166         SSL *con=NULL,*con2=NULL;
 167         int s,k,width,state=0;
 168         char *cbuf=NULL,*sbuf=NULL;
 169         int cbuf_len,cbuf_off;
 170         int sbuf_len,sbuf_off;
 171         fd_set readfds,writefds;
 172         short port=PORT;
 173         int full_log=1;
 174         char *host=SSL_HOST_NAME;
 175         char *cert_file=NULL,*key_file=NULL;
 176         char *CApath=NULL,*CAfile=NULL,*cipher=NULL;
 177         int reconnect=0,badop=0,verify=SSL_VERIFY_NONE,bugs=0;
 178         int crlf=0;
 179         int write_tty,read_tty,write_ssl,read_ssl,tty_on,ssl_pending;
 180         SSL_CTX *ctx=NULL;
 181         int ret=1,in_init=1,i,nbio_test=0;
 182         int prexit = 0;
 183         SSL_METHOD *meth=NULL;
 184         BIO *sbio;
 185         char *engine_id=NULL;
 186         ENGINE *e=NULL;
 187 #ifdef WINDOWS
 188         struct timeval tv;
 189 #endif
 190
 191 #if !defined(NO_SSL2) && !defined(NO_SSL3)
 192         meth=SSLv23_client_method();
 193 #elif !defined(NO_SSL3)
 194         meth=SSLv3_client_method();
 195 #elif !defined(NO_SSL2)
 196         meth=SSLv2_client_method();
 197 #endif
 198
 199         apps_startup();
 200         c_Pause=0;
 201         c_quiet=0;
 202         c_ign_eof=0;
 203         c_debug=0;
 204         c_showcerts=0;
 205
 206         if (bio_err == NULL)
 207                 bio_err=BIO_new_fp(stderr,BIO_NOCLOSE);
 208
 209         if (    ((cbuf=OPENSSL_malloc(BUFSIZZ)) == NULL) ||
 210                 ((sbuf=OPENSSL_malloc(BUFSIZZ)) == NULL))
 211                 {
 212                 BIO_printf(bio_err,"out of memory\n");
 213                 goto end;
 214                 }
 215
 216         verify_depth=0;
 217         verify_error=X509_V_OK;
 218 #ifdef FIONBIO
 219         c_nbio=0;
 220 #endif
 221
 222         argc--;
 223         argv++;
 224         while (argc >= 1)
 225                 {
 226                 if      (strcmp(*argv,"-host") == 0)
 227                         {
 228                         if (--argc < 1) goto bad;
 229                         host= *(++argv);
 230                         }
 231                 else if (strcmp(*argv,"-port") == 0)
 232                         {
 233                         if (--argc < 1) goto bad;
 234                         port=atoi(*(++argv));
 235                         if (port == 0) goto bad;
 236                         }
 237                 else if (strcmp(*argv,"-connect") == 0)
 238                         {
 239                         if (--argc < 1) goto bad;
 240                         if (!extract_host_port(*(++argv),&host,NULL,&port))
 241                                 goto bad;
 242                         }
 243                 else if (strcmp(*argv,"-verify") == 0)
 244                         {
 245                         verify=SSL_VERIFY_PEER;
 246                         if (--argc < 1) goto bad;
 247                         verify_depth=atoi(*(++argv));
 248                         BIO_printf(bio_err,"verify depth is %d\n",verify_depth);
 249                         }
 250                 else if (strcmp(*argv,"-cert") == 0)
 251                         {
 252                         if (--argc < 1) goto bad;
 253                         cert_file= *(++argv);
 254                         }
 255                 else if (strcmp(*argv,"-prexit") == 0)
 256                         prexit=1;
 257                 else if (strcmp(*argv,"-crlf") == 0)
 258                         crlf=1;
 259                 else if (strcmp(*argv,"-quiet") == 0)
 260                         {
 261                         c_quiet=1;
 262                         c_ign_eof=1;
 263                         }
 264                 else if (strcmp(*argv,"-ign_eof") == 0)
 265                         c_ign_eof=1;
 266                 else if (strcmp(*argv,"-pause") == 0)
 267                         c_Pause=1;
 268                 else if (strcmp(*argv,"-debug") == 0)
 269                         c_debug=1;
 270                 else if (strcmp(*argv,"-showcerts") == 0)
 271                         c_showcerts=1;
 272                 else if (strcmp(*argv,"-nbio_test") == 0)
 273                         nbio_test=1;
 274                 else if (strcmp(*argv,"-state") == 0)
 275                         state=1;
 276 #ifndef NO_SSL2
 277                 else if (strcmp(*argv,"-ssl2") == 0)
 278                         meth=SSLv2_client_method();
 279 #endif
 280 #ifndef NO_SSL3
 281                 else if (strcmp(*argv,"-ssl3") == 0)
 282                         meth=SSLv3_client_method();
 283 #endif
 284 #ifndef NO_TLS1
 285                 else if (strcmp(*argv,"-tls1") == 0)
 286                         meth=TLSv1_client_method();
 287 #endif
 288                 else if (strcmp(*argv,"-bugs") == 0)
 289                         bugs=1;
 290                 else if (strcmp(*argv,"-key") == 0)
 291                         {
 292                         if (--argc < 1) goto bad;
 293                         key_file= *(++argv);
 294                         }
 295                 else if (strcmp(*argv,"-reconnect") == 0)
 296                         {
 297                         reconnect=5;
 298                         }
 299                 else if (strcmp(*argv,"-CApath") == 0)
 300                         {
 301                         if (--argc < 1) goto bad;
 302                         CApath= *(++argv);
 303                         }
 304                 else if (strcmp(*argv,"-CAfile") == 0)
 305                         {
 306                         if (--argc < 1) goto bad;
 307                         CAfile= *(++argv);
 308                         }
 309                 else if (strcmp(*argv,"-no_tls1") == 0)
 310                         off|=SSL_OP_NO_TLSv1;
 311                 else if (strcmp(*argv,"-no_ssl3") == 0)
 312                         off|=SSL_OP_NO_SSLv3;
 313                 else if (strcmp(*argv,"-no_ssl2") == 0)
 314                         off|=SSL_OP_NO_SSLv2;
 315                 else if (strcmp(*argv,"-serverpref") == 0)
 316                         off|=SSL_OP_CIPHER_SERVER_PREFERENCE;
 317                 else if (strcmp(*argv,"-cipher") == 0)
 318                         {
 319                         if (--argc < 1) goto bad;
 320                         cipher= *(++argv);
 321                         }
 322 #ifdef FIONBIO
 323                 else if (strcmp(*argv,"-nbio") == 0)
 324                         { c_nbio=1; }
 325 #endif
 326                 else if (strcmp(*argv,"-engine") == 0)
 327                         {
 328                         if (--argc < 1) goto bad;
 329                         engine_id = *(++argv);
 330                         }
 331                 else
 332                         {
 333                         BIO_printf(bio_err,"unknown option %s\n",*argv);
 334                         badop=1;
 335                         break;
 336                         }
 337                 argc--;
 338                 argv++;
 339                 }
 340         if (badop)
 341                 {
 342 bad:
 343                 sc_usage();
 344                 goto end;
 345                 }
 346
 347         app_RAND_load_file(NULL, bio_err, 0);
 348
 349         if (bio_c_out == NULL)
 350                 {
 351                 if (c_quiet)
 352                         {
 353                         bio_c_out=BIO_new(BIO_s_null());
 354                         }
 355                 else
 356                         {
 357                         if (bio_c_out == NULL)
 358                                 bio_c_out=BIO_new_fp(stdout,BIO_NOCLOSE);
 359                         }
 360                 }
 361
 362         OpenSSL_add_ssl_algorithms();
 363         SSL_load_error_strings();
 364
 365         if (engine_id != NULL)
 366                 {
 367                 if((e = ENGINE_by_id(engine_id)) == NULL)
 368                         {
 369                         BIO_printf(bio_err,"invalid engine\n");
 370                         ERR_print_errors(bio_err);
 371                         goto end;
 372                         }
 373                 if (c_debug)
 374                         {
 375                         ENGINE_ctrl(e, ENGINE_CTRL_SET_LOGSTREAM,
 376                                 0, bio_err, 0);
 377                         }
 378                 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL))
 379                         {
 380                         BIO_printf(bio_err,"can't use that engine\n");
 381                         ERR_print_errors(bio_err);
 382                         goto end;
 383                         }
 384                 BIO_printf(bio_err,"engine \"%s\" set.\n", engine_id);
 385                 ENGINE_free(e);
 386                 }
 387
 388         ctx=SSL_CTX_new(meth);
 389         if (ctx == NULL)
 390                 {
 391                 ERR_print_errors(bio_err);
 392                 goto end;
 393                 }
 394
 395         if (bugs)
 396                 SSL_CTX_set_options(ctx,SSL_OP_ALL|off);
 397         else
 398                 SSL_CTX_set_options(ctx,off);
 399
 400         if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);
 401         if (cipher != NULL)
 402                 if(!SSL_CTX_set_cipher_list(ctx,cipher)) {
 403                 BIO_printf(bio_err,"error setting cipher list\n");
 404                 ERR_print_errors(bio_err);
 405                 goto end;
 406         }
 407 #if 0
 408         else
 409                 SSL_CTX_set_cipher_list(ctx,getenv("SSL_CIPHER"));
 410 #endif
 411
 412         SSL_CTX_set_verify(ctx,verify,verify_callback);
 413         if (!set_cert_stuff(ctx,cert_file,key_file))
 414                 goto end;
 415
 416         if ((!SSL_CTX_load_verify_locations(ctx,CAfile,CApath)) ||
 417                 (!SSL_CTX_set_default_verify_paths(ctx)))
 418                 {
 419                 /* BIO_printf(bio_err,"error setting default verify locations\n"); */
 420                 ERR_print_errors(bio_err);
 421                 /* goto end; */
 422                 }
 423
 424
 425         con=SSL_new(ctx);
 426 #ifndef NO_KRB5
 427         if (con  &&  (con->kssl_ctx = kssl_ctx_new()) != NULL)
 428                 {
 429                 kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVER, host);
 430                 }
 431 #endif  /* NO_KRB5  */
 432 /*      SSL_set_cipher_list(con,"RC4-MD5"); */
 433
 434 re_start:
 435
 436         if (init_client(&s,host,port) == 0)
 437                 {
 438                 BIO_printf(bio_err,"connect:errno=%d\n",get_last_socket_error());
 439                 SHUTDOWN(s);
 440                 goto end;
 441                 }
 442         BIO_printf(bio_c_out,"CONNECTED(%08X)\n",s);
 443
 444 #ifdef FIONBIO
 445         if (c_nbio)
 446                 {
 447                 unsigned long l=1;
 448                 BIO_printf(bio_c_out,"turning on non blocking io\n");
 449                 if (BIO_socket_ioctl(s,FIONBIO,&l) < 0)
 450                         {
 451                         ERR_print_errors(bio_err);
 452                         goto end;
 453                         }
 454                 }
 455 #endif
 456         if (c_Pause & 0x01) con->debug=1;
 457         sbio=BIO_new_socket(s,BIO_NOCLOSE);
 458
 459         if (nbio_test)
 460                 {
 461                 BIO *test;
 462
 463                 test=BIO_new(BIO_f_nbio_test());
 464                 sbio=BIO_push(test,sbio);
 465                 }
 466
 467         if (c_debug)
 468                 {
 469                 con->debug=1;
 470                 BIO_set_callback(sbio,bio_dump_cb);
 471                 BIO_set_callback_arg(sbio,bio_c_out);
 472                 }
 473
 474         SSL_set_bio(con,sbio,sbio);
 475         SSL_set_connect_state(con);
 476
 477         /* ok, lets connect */
 478         width=SSL_get_fd(con)+1;
 479
 480         read_tty=1;
 481         write_tty=0;
 482         tty_on=0;
 483         read_ssl=1;
 484         write_ssl=1;
 485
 486         cbuf_len=0;
 487         cbuf_off=0;
 488         sbuf_len=0;
 489         sbuf_off=0;
 490
 491         for (;;)
 492                 {
 493                 FD_ZERO(&readfds);
 494                 FD_ZERO(&writefds);
 495
 496                 if (SSL_in_init(con) && !SSL_total_renegotiations(con))
 497                         {
 498                         in_init=1;
 499                         tty_on=0;
 500                         }
 501                 else
 502                         {
 503                         tty_on=1;
 504                         if (in_init)
 505                                 {
 506                                 in_init=0;
 507                                 print_stuff(bio_c_out,con,full_log);
 508                                 if (full_log > 0) full_log--;
 509
 510                                 if (reconnect)
 511                                         {
 512                                         reconnect--;
 513                                         BIO_printf(bio_c_out,"drop connection and then reconnect\n");
 514                                         SSL_shutdown(con);
 515                                         SSL_set_connect_state(con);
 516                                         SHUTDOWN(SSL_get_fd(con));
 517                                         goto re_start;
 518                                         }
 519                                 }
 520                         }
 521
 522                 ssl_pending = read_ssl && SSL_pending(con);
 523
 524                 if (!ssl_pending)
 525                         {
 526 #ifndef WINDOWS
 527                         if (tty_on)
 528                                 {
 529                                 if (read_tty)  FD_SET(fileno(stdin),&readfds);
 530                                 if (write_tty) FD_SET(fileno(stdout),&writefds);
 531                                 }
 532                         if (read_ssl)
 533                                 FD_SET(SSL_get_fd(con),&readfds);
 534                         if (write_ssl)
 535                                 FD_SET(SSL_get_fd(con),&writefds);
 536 #else
 537                         if(!tty_on || !write_tty) {
 538                                 if (read_ssl)
 539                                         FD_SET(SSL_get_fd(con),&readfds);
 540                                 if (write_ssl)
 541                                         FD_SET(SSL_get_fd(con),&writefds);
 542                         }
 543 #endif
 544 /*                      printf("mode tty(%d %d%d) ssl(%d%d)\n",
 545                                 tty_on,read_tty,write_tty,read_ssl,write_ssl);*/
 546
 547                         /* Note: under VMS with SOCKETSHR the second parameter
 548                          * is currently of type (int *) whereas under other
 549                          * systems it is (void *) if you don't have a cast it
 550                          * will choke the compiler: if you do have a cast then
 551                          * you can either go for (int *) or (void *).
 552                          */
 553 #ifdef WINDOWS
 554                         /* Under Windows we make the assumption that we can
 555                          * always write to the tty: therefore if we need to
 556                          * write to the tty we just fall through. Otherwise
 557                          * we timeout the select every second and see if there
 558                          * are any keypresses. Note: this is a hack, in a proper
 559                          * Windows application we wouldn't do this.
 560                          */
 561                         i=0;
 562                         if(!write_tty) {
 563                                 if(read_tty) {
 564                                         tv.tv_sec = 1;
 565                                         tv.tv_usec = 0;
 566                                         i=select(width,(void *)&readfds,(void *)&writefds,
 567                                                  NULL,&tv);
 568                                         if(!i && (!((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0))) || !read_tty) ) continue;
 569                                 } else  i=select(width,(void *)&readfds,(void *)&writefds,
 570                                          NULL,NULL);
 571                         }
 572 #else
 573                         i=select(width,(void *)&readfds,(void *)&writefds,
 574                                  NULL,NULL);
 575 #endif
 576                         if ( i < 0)
 577                                 {
 578                                 BIO_printf(bio_err,"bad select %d\n",
 579                                 get_last_socket_error());
 580                                 goto shut;
 581                                 /* goto end; */
 582                                 }
 583                         }
 584
 585                 if (!ssl_pending && FD_ISSET(SSL_get_fd(con),&writefds))
 586                         {
 587                         k=SSL_write(con,&(cbuf[cbuf_off]),
 588                                 (unsigned int)cbuf_len);
 589                         switch (SSL_get_error(con,k))
 590                                 {
 591                         case SSL_ERROR_NONE:
 592                                 cbuf_off+=k;
 593                                 cbuf_len-=k;
 594                                 if (k <= 0) goto end;
 595                                 /* we have done a  write(con,NULL,0); */
 596                                 if (cbuf_len <= 0)
 597                                         {
 598                                         read_tty=1;
 599                                         write_ssl=0;
 600                                         }
 601                                 else /* if (cbuf_len > 0) */
 602                                         {
 603                                         read_tty=0;
 604                                         write_ssl=1;
 605                                         }
 606                                 break;
 607                         case SSL_ERROR_WANT_WRITE:
 608                                 BIO_printf(bio_c_out,"write W BLOCK\n");
 609                                 write_ssl=1;
 610                                 read_tty=0;
 611                                 break;
 612                         case SSL_ERROR_WANT_READ:
 613                                 BIO_printf(bio_c_out,"write R BLOCK\n");
 614                                 write_tty=0;
 615                                 read_ssl=1;
 616                                 write_ssl=0;
 617                                 break;
 618                         case SSL_ERROR_WANT_X509_LOOKUP:
 619                                 BIO_printf(bio_c_out,"write X BLOCK\n");
 620                                 break;
 621                         case SSL_ERROR_ZERO_RETURN:
 622                                 if (cbuf_len != 0)
 623                                         {
 624                                         BIO_printf(bio_c_out,"shutdown\n");
 625                                         goto shut;
 626                                         }
 627                                 else
 628                                         {
 629                                         read_tty=1;
 630                                         write_ssl=0;
 631                                         break;
 632                                         }
 633
 634                         case SSL_ERROR_SYSCALL:
 635                                 if ((k != 0) || (cbuf_len != 0))
 636                                         {
 637                                         BIO_printf(bio_err,"write:errno=%d\n",
 638                                                 get_last_socket_error());
 639                                         goto shut;
 640                                         }
 641                                 else
 642                                         {
 643                                         read_tty=1;
 644                                         write_ssl=0;
 645                                         }
 646                                 break;
 647                         case SSL_ERROR_SSL:
 648                                 ERR_print_errors(bio_err);
 649                                 goto shut;
 650                                 }
 651                         }
 652 #ifdef WINDOWS
 653                 /* Assume Windows can always write */
 654                 else if (!ssl_pending && write_tty)
 655 #else
 656                 else if (!ssl_pending && FD_ISSET(fileno(stdout),&writefds))
 657 #endif
 658                         {
 659 #ifdef CHARSET_EBCDIC
 660                         ascii2ebcdic(&(sbuf[sbuf_off]),&(sbuf[sbuf_off]),sbuf_len);
 661 #endif
 662                         i=write(fileno(stdout),&(sbuf[sbuf_off]),sbuf_len);
 663
 664                         if (i <= 0)
 665                                 {
 666                                 BIO_printf(bio_c_out,"DONE\n");
 667                                 goto shut;
 668                                 /* goto end; */
 669                                 }
 670
 671                         sbuf_len-=i;;
 672                         sbuf_off+=i;
 673                         if (sbuf_len <= 0)
 674                                 {
 675                                 read_ssl=1;
 676                                 write_tty=0;
 677                                 }
 678                         }
 679                 else if (ssl_pending || FD_ISSET(SSL_get_fd(con),&readfds))
 680                         {
 681 #ifdef RENEG
 682 { static int iiii; if (++iiii == 52) { SSL_renegotiate(con); iiii=0; } }
 683 #endif
 684 #if 1
 685                         k=SSL_read(con,sbuf,1024 /* BUFSIZZ */ );
 686 #else
 687 /* Demo for pending and peek :-) */
 688                         k=SSL_read(con,sbuf,16);
 689 { char zbuf[10240];
 690 printf("read=%d pending=%d peek=%d\n",k,SSL_pending(con),SSL_peek(con,zbuf,10240));
 691 }
 692 #endif
 693
 694                         switch (SSL_get_error(con,k))
 695                                 {
 696                         case SSL_ERROR_NONE:
 697                                 if (k <= 0)
 698                                         goto end;
 699                                 sbuf_off=0;
 700                                 sbuf_len=k;
 701
 702                                 read_ssl=0;
 703                                 write_tty=1;
 704                                 break;
 705                         case SSL_ERROR_WANT_WRITE:
 706                                 BIO_printf(bio_c_out,"read W BLOCK\n");
 707                                 write_ssl=1;
 708                                 read_tty=0;
 709                                 break;
 710                         case SSL_ERROR_WANT_READ:
 711                                 BIO_printf(bio_c_out,"read R BLOCK\n");
 712                                 write_tty=0;
 713                                 read_ssl=1;
 714                                 if ((read_tty == 0) && (write_ssl == 0))
 715                                         write_ssl=1;
 716                                 break;
 717                         case SSL_ERROR_WANT_X509_LOOKUP:
 718                                 BIO_printf(bio_c_out,"read X BLOCK\n");
 719                                 break;
 720                         case SSL_ERROR_SYSCALL:
 721                                 BIO_printf(bio_err,"read:errno=%d\n",get_last_socket_error());
 722                                 goto shut;
 723                         case SSL_ERROR_ZERO_RETURN:
 724                                 BIO_printf(bio_c_out,"closed\n");
 725                                 goto shut;
 726                         case SSL_ERROR_SSL:
 727                                 ERR_print_errors(bio_err);
 728                                 goto shut;
 729                                 /* break; */
 730                                 }
 731                         }
 732
 733 #ifdef WINDOWS
 734                 else if ((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0)))
 735 #else
 736                 else if (FD_ISSET(fileno(stdin),&readfds))
 737 #endif
 738                         {
 739                         if (crlf)
 740                                 {
 741                                 int j, lf_num;
 742
 743                                 i=read(fileno(stdin),cbuf,BUFSIZZ/2);
 744                                 lf_num = 0;
 745                                 /* both loops are skipped when i <= 0 */
 746                                 for (j = 0; j < i; j++)
 747                                         if (cbuf[j] == '\n')
 748                                                 lf_num++;
 749                                 for (j = i-1; j >= 0; j--)
 750                                         {
 751                                         cbuf[j+lf_num] = cbuf[j];
 752                                         if (cbuf[j] == '\n')
 753                                                 {
 754                                                 lf_num--;
 755                                                 i++;
 756                                                 cbuf[j+lf_num] = '\r';
 757                                                 }
 758                                         }
 759                                 assert(lf_num == 0);
 760                                 }
 761                         else
 762                                 i=read(fileno(stdin),cbuf,BUFSIZZ);
 763
 764                         if ((!c_ign_eof) && ((i <= 0) || (cbuf[0] == 'Q')))
 765                                 {
 766                                 BIO_printf(bio_err,"DONE\n");
 767                                 goto shut;
 768                                 }
 769
 770                         if ((!c_ign_eof) && (cbuf[0] == 'R'))
 771                                 {
 772                                 BIO_printf(bio_err,"RENEGOTIATING\n");
 773                                 SSL_renegotiate(con);
 774                                 cbuf_len=0;
 775                                 }
 776                         else
 777                                 {
 778                                 cbuf_len=i;
 779                                 cbuf_off=0;
 780 #ifdef CHARSET_EBCDIC
 781                                 ebcdic2ascii(cbuf, cbuf, i);
 782 #endif
 783                                 }
 784
 785                         write_ssl=1;
 786                         read_tty=0;
 787                         }
 788                 }
 789 shut:
 790         SSL_shutdown(con);
 791         SHUTDOWN(SSL_get_fd(con));
 792         ret=0;
 793 end:
 794         if(prexit) print_stuff(bio_c_out,con,1);
 795         if (con != NULL) SSL_free(con);
 796         if (con2 != NULL) SSL_free(con2);
 797         if (ctx != NULL) SSL_CTX_free(ctx);
 798         if (cbuf != NULL) { memset(cbuf,0,BUFSIZZ); OPENSSL_free(cbuf); }
 799         if (sbuf != NULL) { memset(sbuf,0,BUFSIZZ); OPENSSL_free(sbuf); }
 800         if (bio_c_out != NULL)
 801                 {
 802                 BIO_free(bio_c_out);
 803                 bio_c_out=NULL;
 804                 }
 805         EXIT(ret);
 806         }
 807
 808
 809 static void print_stuff(BIO *bio, SSL *s, int full)
 810         {
 811         X509 *peer=NULL;
 812         char *p;
 813         static char *space="                ";
 814         char buf[BUFSIZ];
 815         STACK_OF(X509) *sk;
 816         STACK_OF(X509_NAME) *sk2;
 817         SSL_CIPHER *c;
 818         X509_NAME *xn;
 819         int j,i;
 820
 821         if (full)
 822                 {
 823                 int got_a_chain = 0;
 824
 825                 sk=SSL_get_peer_cert_chain(s);
 826                 if (sk != NULL)
 827                         {
 828                         got_a_chain = 1; /* we don't have it for SSL2 (yet) */
 829
 830                         BIO_printf(bio,"---\nCertificate chain\n");
 831                         for (i=0; i<sk_X509_num(sk); i++)
 832                                 {
 833                                 X509_NAME_oneline(X509_get_subject_name(
 834                                         sk_X509_value(sk,i)),buf,BUFSIZ);
 835                                 BIO_printf(bio,"%2d s:%s\n",i,buf);
 836                                 X509_NAME_oneline(X509_get_issuer_name(
 837                                         sk_X509_value(sk,i)),buf,BUFSIZ);
 838                                 BIO_printf(bio,"   i:%s\n",buf);
 839                                 if (c_showcerts)
 840                                         PEM_write_bio_X509(bio,sk_X509_value(sk,i));
 841                                 }
 842                         }
 843
 844                 BIO_printf(bio,"---\n");
 845                 peer=SSL_get_peer_certificate(s);
 846                 if (peer != NULL)
 847                         {
 848                         BIO_printf(bio,"Server certificate\n");
 849                         if (!(c_showcerts && got_a_chain)) /* Redundant if we showed the whole chain */
 850                                 PEM_write_bio_X509(bio,peer);
 851                         X509_NAME_oneline(X509_get_subject_name(peer),
 852                                 buf,BUFSIZ);
 853                         BIO_printf(bio,"subject=%s\n",buf);
 854                         X509_NAME_oneline(X509_get_issuer_name(peer),
 855                                 buf,BUFSIZ);
 856                         BIO_printf(bio,"issuer=%s\n",buf);
 857                         }
 858                 else
 859                         BIO_printf(bio,"no peer certificate available\n");
 860
 861                 sk2=SSL_get_client_CA_list(s);
 862                 if ((sk2 != NULL) && (sk_X509_NAME_num(sk2) > 0))
 863                         {
 864                         BIO_printf(bio,"---\nAcceptable client certificate CA names\n");
 865                         for (i=0; i<sk_X509_NAME_num(sk2); i++)
 866                                 {
 867                                 xn=sk_X509_NAME_value(sk2,i);
 868                                 X509_NAME_oneline(xn,buf,sizeof(buf));
 869                                 BIO_write(bio,buf,strlen(buf));
 870                                 BIO_write(bio,"\n",1);
 871                                 }
 872                         }
 873                 else
 874                         {
 875                         BIO_printf(bio,"---\nNo client certificate CA names sent\n");
 876                         }
 877                 p=SSL_get_shared_ciphers(s,buf,BUFSIZ);
 878                 if (p != NULL)
 879                         {
 880                         /* This works only for SSL 2.  In later protocol
 881                          * versions, the client does not know what other
 882                          * ciphers (in addition to the one to be used
 883                          * in the current connection) the server supports. */
 884
 885                         BIO_printf(bio,"---\nCiphers common between both SSL endpoints:\n");
 886                         j=i=0;
 887                         while (*p)
 888                                 {
 889                                 if (*p == ':')
 890                                         {
 891                                         BIO_write(bio,space,15-j%25);
 892                                         i++;
 893                                         j=0;
 894                                         BIO_write(bio,((i%3)?" ":"\n"),1);
 895                                         }
 896                                 else
 897                                         {
 898                                         BIO_write(bio,p,1);
 899                                         j++;
 900                                         }
 901                                 p++;
 902                                 }
 903                         BIO_write(bio,"\n",1);
 904                         }
 905
 906                 BIO_printf(bio,"---\nSSL handshake has read %ld bytes and written %ld bytes\n",
 907                         BIO_number_read(SSL_get_rbio(s)),
 908                         BIO_number_written(SSL_get_wbio(s)));
 909                 }
 910         BIO_printf(bio,((s->hit)?"---\nReused, ":"---\nNew, "));
 911         c=SSL_get_current_cipher(s);
 912         BIO_printf(bio,"%s, Cipher is %s\n",
 913                 SSL_CIPHER_get_version(c),
 914                 SSL_CIPHER_get_name(c));
 915         if (peer != NULL) {
 916                 EVP_PKEY *pktmp;
 917                 pktmp = X509_get_pubkey(peer);
 918                 BIO_printf(bio,"Server public key is %d bit\n",
 919                                                          EVP_PKEY_bits(pktmp));
 920                 EVP_PKEY_free(pktmp);
 921         }
 922         SSL_SESSION_print(bio,SSL_get_session(s));
 923         BIO_printf(bio,"---\n");
 924         if (peer != NULL)
 925                 X509_free(peer);
 926         }
 927