2c9ae354627f71c9ad1d3d89b616e72b574bddca
[openssl.git] / 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/rand.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         e = setup_engine(bio_err, engine_id, 1);
386
387         ctx=SSL_CTX_new(meth);
388         if (ctx == NULL)
389                 {
390                 ERR_print_errors(bio_err);
391                 goto end;
392                 }
393
394         if (bugs)
395                 SSL_CTX_set_options(ctx,SSL_OP_ALL|off);
396         else
397                 SSL_CTX_set_options(ctx,off);
398
399         if (state) SSL_CTX_set_info_callback(ctx,apps_ssl_info_callback);
400         if (cipher != NULL)
401                 if(!SSL_CTX_set_cipher_list(ctx,cipher)) {
402                 BIO_printf(bio_err,"error setting cipher list\n");
403                 ERR_print_errors(bio_err);
404                 goto end;
405         }
406 #if 0
407         else
408                 SSL_CTX_set_cipher_list(ctx,getenv("SSL_CIPHER"));
409 #endif
410
411         SSL_CTX_set_verify(ctx,verify,verify_callback);
412         if (!set_cert_stuff(ctx,cert_file,key_file))
413                 goto end;
414
415         if ((!SSL_CTX_load_verify_locations(ctx,CAfile,CApath)) ||
416                 (!SSL_CTX_set_default_verify_paths(ctx)))
417                 {
418                 /* BIO_printf(bio_err,"error setting default verify locations\n"); */
419                 ERR_print_errors(bio_err);
420                 /* goto end; */
421                 }
422
423         store = SSL_CTX_get_cert_store(ctx);
424         X509_STORE_set_flags(store, vflags);
425
426         con=SSL_new(ctx);
427 #ifndef OPENSSL_NO_KRB5
428         if (con  &&  (con->kssl_ctx = kssl_ctx_new()) != NULL)
429                 {
430                 kssl_ctx_setstring(con->kssl_ctx, KSSL_SERVER, host);
431                 }
432 #endif  /* OPENSSL_NO_KRB5  */
433 /*      SSL_set_cipher_list(con,"RC4-MD5"); */
434
435 re_start:
436
437         if (init_client(&s,host,port) == 0)
438                 {
439                 BIO_printf(bio_err,"connect:errno=%d\n",get_last_socket_error());
440                 SHUTDOWN(s);
441                 goto end;
442                 }
443         BIO_printf(bio_c_out,"CONNECTED(%08X)\n",s);
444
445 #ifdef FIONBIO
446         if (c_nbio)
447                 {
448                 unsigned long l=1;
449                 BIO_printf(bio_c_out,"turning on non blocking io\n");
450                 if (BIO_socket_ioctl(s,FIONBIO,&l) < 0)
451                         {
452                         ERR_print_errors(bio_err);
453                         goto end;
454                         }
455                 }
456 #endif                                              
457         if (c_Pause & 0x01) con->debug=1;
458         sbio=BIO_new_socket(s,BIO_NOCLOSE);
459
460         if (nbio_test)
461                 {
462                 BIO *test;
463
464                 test=BIO_new(BIO_f_nbio_test());
465                 sbio=BIO_push(test,sbio);
466                 }
467
468         if (c_debug)
469                 {
470                 con->debug=1;
471                 BIO_set_callback(sbio,bio_dump_cb);
472                 BIO_set_callback_arg(sbio,bio_c_out);
473                 }
474
475         SSL_set_bio(con,sbio,sbio);
476         SSL_set_connect_state(con);
477
478         /* ok, lets connect */
479         width=SSL_get_fd(con)+1;
480
481         read_tty=1;
482         write_tty=0;
483         tty_on=0;
484         read_ssl=1;
485         write_ssl=1;
486         
487         cbuf_len=0;
488         cbuf_off=0;
489         sbuf_len=0;
490         sbuf_off=0;
491
492         for (;;)
493                 {
494                 FD_ZERO(&readfds);
495                 FD_ZERO(&writefds);
496
497                 if (SSL_in_init(con) && !SSL_total_renegotiations(con))
498                         {
499                         in_init=1;
500                         tty_on=0;
501                         }
502                 else
503                         {
504                         tty_on=1;
505                         if (in_init)
506                                 {
507                                 in_init=0;
508                                 print_stuff(bio_c_out,con,full_log);
509                                 if (full_log > 0) full_log--;
510
511                                 if (reconnect)
512                                         {
513                                         reconnect--;
514                                         BIO_printf(bio_c_out,"drop connection and then reconnect\n");
515                                         SSL_shutdown(con);
516                                         SSL_set_connect_state(con);
517                                         SHUTDOWN(SSL_get_fd(con));
518                                         goto re_start;
519                                         }
520                                 }
521                         }
522
523                 ssl_pending = read_ssl && SSL_pending(con);
524
525                 if (!ssl_pending)
526                         {
527 #ifndef OPENSSL_SYS_WINDOWS
528                         if (tty_on)
529                                 {
530                                 if (read_tty)  FD_SET(fileno(stdin),&readfds);
531                                 if (write_tty) FD_SET(fileno(stdout),&writefds);
532                                 }
533                         if (read_ssl)
534                                 FD_SET(SSL_get_fd(con),&readfds);
535                         if (write_ssl)
536                                 FD_SET(SSL_get_fd(con),&writefds);
537 #else
538                         if(!tty_on || !write_tty) {
539                                 if (read_ssl)
540                                         FD_SET(SSL_get_fd(con),&readfds);
541                                 if (write_ssl)
542                                         FD_SET(SSL_get_fd(con),&writefds);
543                         }
544 #endif
545 /*                      printf("mode tty(%d %d%d) ssl(%d%d)\n",
546                                 tty_on,read_tty,write_tty,read_ssl,write_ssl);*/
547
548                         /* Note: under VMS with SOCKETSHR the second parameter
549                          * is currently of type (int *) whereas under other
550                          * systems it is (void *) if you don't have a cast it
551                          * will choke the compiler: if you do have a cast then
552                          * you can either go for (int *) or (void *).
553                          */
554 #ifdef OPENSSL_SYS_WINDOWS
555                         /* Under Windows we make the assumption that we can
556                          * always write to the tty: therefore if we need to
557                          * write to the tty we just fall through. Otherwise
558                          * we timeout the select every second and see if there
559                          * are any keypresses. Note: this is a hack, in a proper
560                          * Windows application we wouldn't do this.
561                          */
562                         i=0;
563                         if(!write_tty) {
564                                 if(read_tty) {
565                                         tv.tv_sec = 1;
566                                         tv.tv_usec = 0;
567                                         i=select(width,(void *)&readfds,(void *)&writefds,
568                                                  NULL,&tv);
569                                         if(!i && (!((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0))) || !read_tty) ) continue;
570                                 } else  i=select(width,(void *)&readfds,(void *)&writefds,
571                                          NULL,NULL);
572                         }
573 #else
574                         i=select(width,(void *)&readfds,(void *)&writefds,
575                                  NULL,NULL);
576 #endif
577                         if ( i < 0)
578                                 {
579                                 BIO_printf(bio_err,"bad select %d\n",
580                                 get_last_socket_error());
581                                 goto shut;
582                                 /* goto end; */
583                                 }
584                         }
585
586                 if (!ssl_pending && FD_ISSET(SSL_get_fd(con),&writefds))
587                         {
588                         k=SSL_write(con,&(cbuf[cbuf_off]),
589                                 (unsigned int)cbuf_len);
590                         switch (SSL_get_error(con,k))
591                                 {
592                         case SSL_ERROR_NONE:
593                                 cbuf_off+=k;
594                                 cbuf_len-=k;
595                                 if (k <= 0) goto end;
596                                 /* we have done a  write(con,NULL,0); */
597                                 if (cbuf_len <= 0)
598                                         {
599                                         read_tty=1;
600                                         write_ssl=0;
601                                         }
602                                 else /* if (cbuf_len > 0) */
603                                         {
604                                         read_tty=0;
605                                         write_ssl=1;
606                                         }
607                                 break;
608                         case SSL_ERROR_WANT_WRITE:
609                                 BIO_printf(bio_c_out,"write W BLOCK\n");
610                                 write_ssl=1;
611                                 read_tty=0;
612                                 break;
613                         case SSL_ERROR_WANT_READ:
614                                 BIO_printf(bio_c_out,"write R BLOCK\n");
615                                 write_tty=0;
616                                 read_ssl=1;
617                                 write_ssl=0;
618                                 break;
619                         case SSL_ERROR_WANT_X509_LOOKUP:
620                                 BIO_printf(bio_c_out,"write X BLOCK\n");
621                                 break;
622                         case SSL_ERROR_ZERO_RETURN:
623                                 if (cbuf_len != 0)
624                                         {
625                                         BIO_printf(bio_c_out,"shutdown\n");
626                                         goto shut;
627                                         }
628                                 else
629                                         {
630                                         read_tty=1;
631                                         write_ssl=0;
632                                         break;
633                                         }
634                                 
635                         case SSL_ERROR_SYSCALL:
636                                 if ((k != 0) || (cbuf_len != 0))
637                                         {
638                                         BIO_printf(bio_err,"write:errno=%d\n",
639                                                 get_last_socket_error());
640                                         goto shut;
641                                         }
642                                 else
643                                         {
644                                         read_tty=1;
645                                         write_ssl=0;
646                                         }
647                                 break;
648                         case SSL_ERROR_SSL:
649                                 ERR_print_errors(bio_err);
650                                 goto shut;
651                                 }
652                         }
653 #ifdef OPENSSL_SYS_WINDOWS
654                 /* Assume Windows can always write */
655                 else if (!ssl_pending && write_tty)
656 #else
657                 else if (!ssl_pending && FD_ISSET(fileno(stdout),&writefds))
658 #endif
659                         {
660 #ifdef CHARSET_EBCDIC
661                         ascii2ebcdic(&(sbuf[sbuf_off]),&(sbuf[sbuf_off]),sbuf_len);
662 #endif
663                         i=write(fileno(stdout),&(sbuf[sbuf_off]),sbuf_len);
664
665                         if (i <= 0)
666                                 {
667                                 BIO_printf(bio_c_out,"DONE\n");
668                                 goto shut;
669                                 /* goto end; */
670                                 }
671
672                         sbuf_len-=i;;
673                         sbuf_off+=i;
674                         if (sbuf_len <= 0)
675                                 {
676                                 read_ssl=1;
677                                 write_tty=0;
678                                 }
679                         }
680                 else if (ssl_pending || FD_ISSET(SSL_get_fd(con),&readfds))
681                         {
682 #ifdef RENEG
683 { static int iiii; if (++iiii == 52) { SSL_renegotiate(con); iiii=0; } }
684 #endif
685 #if 1
686                         k=SSL_read(con,sbuf,1024 /* BUFSIZZ */ );
687 #else
688 /* Demo for pending and peek :-) */
689                         k=SSL_read(con,sbuf,16);
690 { char zbuf[10240]; 
691 printf("read=%d pending=%d peek=%d\n",k,SSL_pending(con),SSL_peek(con,zbuf,10240));
692 }
693 #endif
694
695                         switch (SSL_get_error(con,k))
696                                 {
697                         case SSL_ERROR_NONE:
698                                 if (k <= 0)
699                                         goto end;
700                                 sbuf_off=0;
701                                 sbuf_len=k;
702
703                                 read_ssl=0;
704                                 write_tty=1;
705                                 break;
706                         case SSL_ERROR_WANT_WRITE:
707                                 BIO_printf(bio_c_out,"read W BLOCK\n");
708                                 write_ssl=1;
709                                 read_tty=0;
710                                 break;
711                         case SSL_ERROR_WANT_READ:
712                                 BIO_printf(bio_c_out,"read R BLOCK\n");
713                                 write_tty=0;
714                                 read_ssl=1;
715                                 if ((read_tty == 0) && (write_ssl == 0))
716                                         write_ssl=1;
717                                 break;
718                         case SSL_ERROR_WANT_X509_LOOKUP:
719                                 BIO_printf(bio_c_out,"read X BLOCK\n");
720                                 break;
721                         case SSL_ERROR_SYSCALL:
722                                 BIO_printf(bio_err,"read:errno=%d\n",get_last_socket_error());
723                                 goto shut;
724                         case SSL_ERROR_ZERO_RETURN:
725                                 BIO_printf(bio_c_out,"closed\n");
726                                 goto shut;
727                         case SSL_ERROR_SSL:
728                                 ERR_print_errors(bio_err);
729                                 goto shut;
730                                 /* break; */
731                                 }
732                         }
733
734 #ifdef OPENSSL_SYS_WINDOWS
735                 else if ((_kbhit()) || (WAIT_OBJECT_0 == WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE), 0)))
736 #else
737                 else if (FD_ISSET(fileno(stdin),&readfds))
738 #endif
739                         {
740                         if (crlf)
741                                 {
742                                 int j, lf_num;
743
744                                 i=read(fileno(stdin),cbuf,BUFSIZZ/2);
745                                 lf_num = 0;
746                                 /* both loops are skipped when i <= 0 */
747                                 for (j = 0; j < i; j++)
748                                         if (cbuf[j] == '\n')
749                                                 lf_num++;
750                                 for (j = i-1; j >= 0; j--)
751                                         {
752                                         cbuf[j+lf_num] = cbuf[j];
753                                         if (cbuf[j] == '\n')
754                                                 {
755                                                 lf_num--;
756                                                 i++;
757                                                 cbuf[j+lf_num] = '\r';
758                                                 }
759                                         }
760                                 assert(lf_num == 0);
761                                 }
762                         else
763                                 i=read(fileno(stdin),cbuf,BUFSIZZ);
764
765                         if ((!c_ign_eof) && ((i <= 0) || (cbuf[0] == 'Q')))
766                                 {
767                                 BIO_printf(bio_err,"DONE\n");
768                                 goto shut;
769                                 }
770
771                         if ((!c_ign_eof) && (cbuf[0] == 'R'))
772                                 {
773                                 BIO_printf(bio_err,"RENEGOTIATING\n");
774                                 SSL_renegotiate(con);
775                                 cbuf_len=0;
776                                 }
777                         else
778                                 {
779                                 cbuf_len=i;
780                                 cbuf_off=0;
781 #ifdef CHARSET_EBCDIC
782                                 ebcdic2ascii(cbuf, cbuf, i);
783 #endif
784                                 }
785
786                         write_ssl=1;
787                         read_tty=0;
788                         }
789                 }
790 shut:
791         SSL_shutdown(con);
792         SHUTDOWN(SSL_get_fd(con));
793         ret=0;
794 end:
795         if(prexit) print_stuff(bio_c_out,con,1);
796         if (con != NULL) SSL_free(con);
797         if (con2 != NULL) SSL_free(con2);
798         if (ctx != NULL) SSL_CTX_free(ctx);
799         if (cbuf != NULL) { memset(cbuf,0,BUFSIZZ); OPENSSL_free(cbuf); }
800         if (sbuf != NULL) { memset(sbuf,0,BUFSIZZ); OPENSSL_free(sbuf); }
801         if (bio_c_out != NULL)
802                 {
803                 BIO_free(bio_c_out);
804                 bio_c_out=NULL;
805                 }
806         apps_shutdown();
807         EXIT(ret);
808         }
809
810
811 static void print_stuff(BIO *bio, SSL *s, int full)
812         {
813         X509 *peer=NULL;
814         char *p;
815         static char *space="                ";
816         char buf[BUFSIZ];
817         STACK_OF(X509) *sk;
818         STACK_OF(X509_NAME) *sk2;
819         SSL_CIPHER *c;
820         X509_NAME *xn;
821         int j,i;
822
823         if (full)
824                 {
825                 int got_a_chain = 0;
826
827                 sk=SSL_get_peer_cert_chain(s);
828                 if (sk != NULL)
829                         {
830                         got_a_chain = 1; /* we don't have it for SSL2 (yet) */
831
832                         BIO_printf(bio,"---\nCertificate chain\n");
833                         for (i=0; i<sk_X509_num(sk); i++)
834                                 {
835                                 X509_NAME_oneline(X509_get_subject_name(
836                                         sk_X509_value(sk,i)),buf,BUFSIZ);
837                                 BIO_printf(bio,"%2d s:%s\n",i,buf);
838                                 X509_NAME_oneline(X509_get_issuer_name(
839                                         sk_X509_value(sk,i)),buf,BUFSIZ);
840                                 BIO_printf(bio,"   i:%s\n",buf);
841                                 if (c_showcerts)
842                                         PEM_write_bio_X509(bio,sk_X509_value(sk,i));
843                                 }
844                         }
845
846                 BIO_printf(bio,"---\n");
847                 peer=SSL_get_peer_certificate(s);
848                 if (peer != NULL)
849                         {
850                         BIO_printf(bio,"Server certificate\n");
851                         if (!(c_showcerts && got_a_chain)) /* Redundant if we showed the whole chain */
852                                 PEM_write_bio_X509(bio,peer);
853                         X509_NAME_oneline(X509_get_subject_name(peer),
854                                 buf,BUFSIZ);
855                         BIO_printf(bio,"subject=%s\n",buf);
856                         X509_NAME_oneline(X509_get_issuer_name(peer),
857                                 buf,BUFSIZ);
858                         BIO_printf(bio,"issuer=%s\n",buf);
859                         }
860                 else
861                         BIO_printf(bio,"no peer certificate available\n");
862
863                 sk2=SSL_get_client_CA_list(s);
864                 if ((sk2 != NULL) && (sk_X509_NAME_num(sk2) > 0))
865                         {
866                         BIO_printf(bio,"---\nAcceptable client certificate CA names\n");
867                         for (i=0; i<sk_X509_NAME_num(sk2); i++)
868                                 {
869                                 xn=sk_X509_NAME_value(sk2,i);
870                                 X509_NAME_oneline(xn,buf,sizeof(buf));
871                                 BIO_write(bio,buf,strlen(buf));
872                                 BIO_write(bio,"\n",1);
873                                 }
874                         }
875                 else
876                         {
877                         BIO_printf(bio,"---\nNo client certificate CA names sent\n");
878                         }
879                 p=SSL_get_shared_ciphers(s,buf,BUFSIZ);
880                 if (p != NULL)
881                         {
882                         /* This works only for SSL 2.  In later protocol
883                          * versions, the client does not know what other
884                          * ciphers (in addition to the one to be used
885                          * in the current connection) the server supports. */
886
887                         BIO_printf(bio,"---\nCiphers common between both SSL endpoints:\n");
888                         j=i=0;
889                         while (*p)
890                                 {
891                                 if (*p == ':')
892                                         {
893                                         BIO_write(bio,space,15-j%25);
894                                         i++;
895                                         j=0;
896                                         BIO_write(bio,((i%3)?" ":"\n"),1);
897                                         }
898                                 else
899                                         {
900                                         BIO_write(bio,p,1);
901                                         j++;
902                                         }
903                                 p++;
904                                 }
905                         BIO_write(bio,"\n",1);
906                         }
907
908                 BIO_printf(bio,"---\nSSL handshake has read %ld bytes and written %ld bytes\n",
909                         BIO_number_read(SSL_get_rbio(s)),
910                         BIO_number_written(SSL_get_wbio(s)));
911                 }
912         BIO_printf(bio,((s->hit)?"---\nReused, ":"---\nNew, "));
913         c=SSL_get_current_cipher(s);
914         BIO_printf(bio,"%s, Cipher is %s\n",
915                 SSL_CIPHER_get_version(c),
916                 SSL_CIPHER_get_name(c));
917         if (peer != NULL) {
918                 EVP_PKEY *pktmp;
919                 pktmp = X509_get_pubkey(peer);
920                 BIO_printf(bio,"Server public key is %d bit\n",
921                                                          EVP_PKEY_bits(pktmp));
922                 EVP_PKEY_free(pktmp);
923         }
924         SSL_SESSION_print(bio,SSL_get_session(s));
925         BIO_printf(bio,"---\n");
926         if (peer != NULL)
927                 X509_free(peer);
928         /* flush, or debugging output gets mixed with http response */
929         BIO_flush(bio);
930         }
931