2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
58 /* ====================================================================
59 * Copyright (c) 1998-2001 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
116 #include <openssl/e_os2.h>
117 #ifdef OPENSSL_NO_STDIO
122 * With IPv6, it looks like Digital has mixed up the proper order of
123 * recursive header file inclusion, resulting in the compiler complaining
124 * that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which is
125 * needed to have fileno() declared correctly... So let's define u_int
127 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
129 typedef unsigned int u_int
;
134 #include <openssl/x509.h>
135 #include <openssl/ssl.h>
136 #include <openssl/err.h>
137 #include <openssl/pem.h>
138 #include <openssl/rand.h>
139 #include <openssl/ocsp.h>
141 #include "timeouts.h"
143 #ifdef OPENSSL_SYS_WINCE
145 * Windows CE incorrectly defines fileno as returning void*, so to avoid
151 # define fileno(a) (int)_fileno(a)
154 #if (defined(OPENSSL_SYS_VMS) && __VMS_VER < 70000000)
155 /* FIONBIO used as a switch to enable ioctl, and that isn't in VMS < 7.0 */
160 #define PROG s_client_main
163 * #define SSL_HOST_NAME "www.netscape.com"
166 * #define SSL_HOST_NAME "193.118.187.102"
168 #define SSL_HOST_NAME "localhost"
170 /* no default cert. */
172 * #define TEST_CERT "client.pem"
176 #define BUFSIZZ 1024*8
178 extern int verify_depth
;
179 extern int verify_error
;
182 static int c_nbio
= 0;
184 static int c_Pause
= 0;
185 static int c_debug
= 0;
186 #ifndef OPENSSL_NO_TLSEXT
187 static int c_tlsextdebug
= 0;
188 static int c_status_req
= 0;
190 static int c_msg
= 0;
191 static int c_showcerts
= 0;
193 static void sc_usage(void);
194 static void print_stuff(BIO
*berr
, SSL
*con
, int full
);
195 #ifndef OPENSSL_NO_TLSEXT
196 static int ocsp_resp_cb(SSL
*s
, void *arg
);
198 static BIO
*bio_c_out
= NULL
;
199 static int c_quiet
= 0;
200 static int c_ign_eof
= 0;
202 static void sc_usage(void)
204 BIO_printf(bio_err
, "usage: s_client args\n");
205 BIO_printf(bio_err
, "\n");
206 BIO_printf(bio_err
, " -host host - use -connect instead\n");
207 BIO_printf(bio_err
, " -port port - use -connect instead\n");
209 " -connect host:port - who to connect to (default is %s:%s)\n",
210 SSL_HOST_NAME
, PORT_STR
);
213 " -verify depth - turn on peer certificate verification\n");
215 " -cert arg - certificate file to use, PEM format assumed\n");
217 " -certform arg - certificate format (PEM or DER) PEM default\n");
219 " -key arg - Private key file to use, in cert file if\n");
220 BIO_printf(bio_err
, " not specified but cert file is.\n");
222 " -keyform arg - key format (PEM or DER) PEM default\n");
224 " -pass arg - private key file pass phrase source\n");
225 BIO_printf(bio_err
, " -CApath arg - PEM format directory of CA's\n");
226 BIO_printf(bio_err
, " -CAfile arg - PEM format file of CA's\n");
228 " -reconnect - Drop and re-make the connection with the same Session-ID\n");
230 " -pause - sleep(1) after each read(2) and write(2) system call\n");
232 " -showcerts - show all certificates in the chain\n");
233 BIO_printf(bio_err
, " -debug - extra output\n");
235 BIO_printf(bio_err
, " -wdebug - WATT-32 tcp debugging\n");
237 BIO_printf(bio_err
, " -msg - Show protocol messages\n");
238 BIO_printf(bio_err
, " -nbio_test - more ssl protocol testing\n");
239 BIO_printf(bio_err
, " -state - print the 'ssl' states\n");
241 BIO_printf(bio_err
, " -nbio - Run with non-blocking IO\n");
244 " -crlf - convert LF from terminal into CRLF\n");
245 BIO_printf(bio_err
, " -quiet - no s_client output\n");
247 " -ign_eof - ignore input eof (default when -quiet)\n");
248 BIO_printf(bio_err
, " -no_ign_eof - don't ignore input eof\n");
249 BIO_printf(bio_err
, " -ssl2 - just use SSLv2\n");
250 BIO_printf(bio_err
, " -ssl3 - just use SSLv3\n");
251 BIO_printf(bio_err
, " -tls1 - just use TLSv1\n");
252 BIO_printf(bio_err
, " -dtls1 - just use DTLSv1\n");
253 BIO_printf(bio_err
, " -fallback_scsv - send TLS_FALLBACK_SCSV\n");
254 BIO_printf(bio_err
, " -mtu - set the link layer MTU\n");
256 " -no_tls1/-no_ssl3/-no_ssl2 - turn off that protocol\n");
258 " -bugs - Switch on all SSL implementation bug workarounds\n");
260 " -serverpref - Use server's cipher preferences (only SSLv2)\n");
262 " -cipher - preferred cipher to use, use the 'openssl ciphers'\n");
264 " command to see what is available\n");
266 " -starttls prot - use the STARTTLS command before starting TLS\n");
268 " for those protocols that support it, where\n");
270 " 'prot' defines which one to assume. Currently,\n");
272 " only \"smtp\", \"pop3\", \"imap\", \"ftp\" and \"xmpp\"\n");
273 BIO_printf(bio_err
, " are supported.\n");
274 #ifndef OPENSSL_NO_ENGINE
276 " -engine id - Initialise and use the specified engine\n");
278 BIO_printf(bio_err
, " -rand file%cfile%c...\n", LIST_SEPARATOR_CHAR
,
279 LIST_SEPARATOR_CHAR
);
280 BIO_printf(bio_err
, " -sess_out arg - file to write SSL session to\n");
281 BIO_printf(bio_err
, " -sess_in arg - file to read SSL session from\n");
282 #ifndef OPENSSL_NO_TLSEXT
284 " -servername host - Set TLS extension servername in ClientHello\n");
286 " -tlsextdebug - hex dump of all TLS extensions received\n");
288 " -status - request certificate status from server\n");
290 " -no_ticket - disable use of RFC4507bis session tickets\n");
293 " -legacy_renegotiation - enable use of legacy renegotiation (dangerous)\n");
296 #ifndef OPENSSL_NO_TLSEXT
298 /* This is a context that we pass to callbacks */
299 typedef struct tlsextctx_st
{
304 static int MS_CALLBACK
ssl_servername_cb(SSL
*s
, int *ad
, void *arg
)
306 tlsextctx
*p
= (tlsextctx
*) arg
;
307 const char *hn
= SSL_get_servername(s
, TLSEXT_NAMETYPE_host_name
);
308 if (SSL_get_servername_type(s
) != -1)
309 p
->ack
= !SSL_session_reused(s
) && hn
!= NULL
;
311 BIO_printf(bio_err
, "Can't use SSL_get_servername\n");
313 return SSL_TLSEXT_ERR_OK
;
325 int MAIN(int, char **);
327 int MAIN(int argc
, char **argv
)
329 int off
= 0, clr
= 0;
330 SSL
*con
= NULL
, *con2
= NULL
;
331 X509_STORE
*store
= NULL
;
332 int s
, k
, width
, state
= 0;
333 char *cbuf
= NULL
, *sbuf
= NULL
, *mbuf
= NULL
;
334 int cbuf_len
, cbuf_off
;
335 int sbuf_len
, sbuf_off
;
336 fd_set readfds
, writefds
;
339 char *host
= SSL_HOST_NAME
;
340 char *cert_file
= NULL
, *key_file
= NULL
;
341 int cert_format
= FORMAT_PEM
, key_format
= FORMAT_PEM
;
342 char *passarg
= NULL
, *pass
= NULL
;
344 EVP_PKEY
*key
= NULL
;
345 char *CApath
= NULL
, *CAfile
= NULL
, *cipher
= NULL
;
346 int reconnect
= 0, badop
= 0, verify
= SSL_VERIFY_NONE
, bugs
= 0;
348 int write_tty
, read_tty
, write_ssl
, read_ssl
, tty_on
, ssl_pending
;
350 int ret
= 1, in_init
= 1, i
, nbio_test
= 0;
351 int starttls_proto
= PROTO_OFF
;
352 int prexit
= 0, vflags
= 0;
353 SSL_METHOD
*meth
= NULL
;
357 int sock_type
= SOCK_STREAM
;
361 struct timeval timeout
, *timeoutp
;
362 #ifndef OPENSSL_NO_ENGINE
363 char *engine_id
= NULL
;
364 char *ssl_client_engine_id
= NULL
;
365 ENGINE
*ssl_client_engine
= NULL
;
368 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_NETWARE)
372 #ifndef OPENSSL_NO_TLSEXT
373 char *servername
= NULL
;
374 tlsextctx tlsextcbp
= { NULL
, 0 };
376 char *sess_in
= NULL
;
377 char *sess_out
= NULL
;
378 struct sockaddr peer
;
379 int peerlen
= sizeof(peer
);
380 int fallback_scsv
= 0;
381 int enable_timeouts
= 0;
383 #ifndef OPENSSL_NO_JPAKE
384 char *jpake_secret
= NULL
;
387 meth
= SSLv23_client_method();
398 bio_err
= BIO_new_fp(stderr
, BIO_NOCLOSE
);
400 if (!load_config(bio_err
, NULL
))
403 if (((cbuf
= OPENSSL_malloc(BUFSIZZ
)) == NULL
) ||
404 ((sbuf
= OPENSSL_malloc(BUFSIZZ
)) == NULL
) ||
405 ((mbuf
= OPENSSL_malloc(BUFSIZZ
)) == NULL
)) {
406 BIO_printf(bio_err
, "out of memory\n");
411 verify_error
= X509_V_OK
;
419 if (strcmp(*argv
, "-host") == 0) {
423 } else if (strcmp(*argv
, "-port") == 0) {
426 port
= atoi(*(++argv
));
429 } else if (strcmp(*argv
, "-connect") == 0) {
432 if (!extract_host_port(*(++argv
), &host
, NULL
, &port
))
434 } else if (strcmp(*argv
, "-verify") == 0) {
435 verify
= SSL_VERIFY_PEER
;
438 verify_depth
= atoi(*(++argv
));
439 BIO_printf(bio_err
, "verify depth is %d\n", verify_depth
);
440 } else if (strcmp(*argv
, "-cert") == 0) {
443 cert_file
= *(++argv
);
444 } else if (strcmp(*argv
, "-sess_out") == 0) {
447 sess_out
= *(++argv
);
448 } else if (strcmp(*argv
, "-sess_in") == 0) {
452 } else if (strcmp(*argv
, "-certform") == 0) {
455 cert_format
= str2fmt(*(++argv
));
456 } else if (strcmp(*argv
, "-crl_check") == 0)
457 vflags
|= X509_V_FLAG_CRL_CHECK
;
458 else if (strcmp(*argv
, "-crl_check_all") == 0)
459 vflags
|= X509_V_FLAG_CRL_CHECK
| X509_V_FLAG_CRL_CHECK_ALL
;
460 else if (strcmp(*argv
, "-prexit") == 0)
462 else if (strcmp(*argv
, "-crlf") == 0)
464 else if (strcmp(*argv
, "-quiet") == 0) {
467 } else if (strcmp(*argv
, "-ign_eof") == 0)
469 else if (strcmp(*argv
, "-no_ign_eof") == 0)
471 else if (strcmp(*argv
, "-pause") == 0)
473 else if (strcmp(*argv
, "-debug") == 0)
475 #ifndef OPENSSL_NO_TLSEXT
476 else if (strcmp(*argv
, "-tlsextdebug") == 0)
478 else if (strcmp(*argv
, "-status") == 0)
482 else if (strcmp(*argv
, "-wdebug") == 0)
485 else if (strcmp(*argv
, "-msg") == 0)
487 else if (strcmp(*argv
, "-showcerts") == 0)
489 else if (strcmp(*argv
, "-nbio_test") == 0)
491 else if (strcmp(*argv
, "-state") == 0)
493 #ifndef OPENSSL_NO_SSL2
494 else if (strcmp(*argv
, "-ssl2") == 0)
495 meth
= SSLv2_client_method();
497 #ifndef OPENSSL_NO_SSL3
498 else if (strcmp(*argv
, "-ssl3") == 0)
499 meth
= SSLv3_client_method();
501 #ifndef OPENSSL_NO_TLS1
502 else if (strcmp(*argv
, "-tls1") == 0)
503 meth
= TLSv1_client_method();
505 #ifndef OPENSSL_NO_DTLS1
506 else if (strcmp(*argv
, "-dtls1") == 0) {
507 meth
= DTLSv1_client_method();
508 sock_type
= SOCK_DGRAM
;
509 } else if (strcmp(*argv
, "-timeout") == 0)
511 else if (strcmp(*argv
, "-mtu") == 0) {
514 socket_mtu
= atol(*(++argv
));
517 else if (strcmp(*argv
, "-fallback_scsv") == 0) {
519 } else if (strcmp(*argv
, "-bugs") == 0)
521 else if (strcmp(*argv
, "-keyform") == 0) {
524 key_format
= str2fmt(*(++argv
));
525 } else if (strcmp(*argv
, "-pass") == 0) {
529 } else if (strcmp(*argv
, "-key") == 0) {
532 key_file
= *(++argv
);
533 } else if (strcmp(*argv
, "-reconnect") == 0) {
535 } else if (strcmp(*argv
, "-CApath") == 0) {
539 } else if (strcmp(*argv
, "-CAfile") == 0) {
543 } else if (strcmp(*argv
, "-no_tls1") == 0)
544 off
|= SSL_OP_NO_TLSv1
;
545 else if (strcmp(*argv
, "-no_ssl3") == 0)
546 off
|= SSL_OP_NO_SSLv3
;
547 else if (strcmp(*argv
, "-no_ssl2") == 0)
548 off
|= SSL_OP_NO_SSLv2
;
549 #ifndef OPENSSL_NO_TLSEXT
550 else if (strcmp(*argv
, "-no_ticket") == 0) {
551 off
|= SSL_OP_NO_TICKET
;
554 else if (strcmp(*argv
, "-serverpref") == 0)
555 off
|= SSL_OP_CIPHER_SERVER_PREFERENCE
;
556 else if (strcmp(*argv
, "-legacy_renegotiation") == 0)
557 off
|= SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
;
558 else if (strcmp(*argv
, "-legacy_server_connect") == 0) {
559 off
|= SSL_OP_LEGACY_SERVER_CONNECT
;
560 } else if (strcmp(*argv
, "-no_legacy_server_connect") == 0) {
561 clr
|= SSL_OP_LEGACY_SERVER_CONNECT
;
562 } else if (strcmp(*argv
, "-cipher") == 0) {
568 else if (strcmp(*argv
, "-nbio") == 0) {
572 else if (strcmp(*argv
, "-starttls") == 0) {
576 if (strcmp(*argv
, "smtp") == 0)
577 starttls_proto
= PROTO_SMTP
;
578 else if (strcmp(*argv
, "pop3") == 0)
579 starttls_proto
= PROTO_POP3
;
580 else if (strcmp(*argv
, "imap") == 0)
581 starttls_proto
= PROTO_IMAP
;
582 else if (strcmp(*argv
, "ftp") == 0)
583 starttls_proto
= PROTO_FTP
;
584 else if (strcmp(*argv
, "xmpp") == 0)
585 starttls_proto
= PROTO_XMPP
;
589 #ifndef OPENSSL_NO_ENGINE
590 else if (strcmp(*argv
, "-engine") == 0) {
593 engine_id
= *(++argv
);
594 } else if (strcmp(*argv
, "-ssl_client_engine") == 0) {
597 ssl_client_engine_id
= *(++argv
);
600 else if (strcmp(*argv
, "-rand") == 0) {
605 #ifndef OPENSSL_NO_TLSEXT
606 else if (strcmp(*argv
, "-servername") == 0) {
609 servername
= *(++argv
);
610 /* meth=TLSv1_client_method(); */
613 #ifndef OPENSSL_NO_JPAKE
614 else if (strcmp(*argv
, "-jpake") == 0) {
617 jpake_secret
= *++argv
;
621 BIO_printf(bio_err
, "unknown option %s\n", *argv
);
634 OpenSSL_add_ssl_algorithms();
635 SSL_load_error_strings();
637 #ifndef OPENSSL_NO_ENGINE
638 e
= setup_engine(bio_err
, engine_id
, 1);
639 if (ssl_client_engine_id
) {
640 ssl_client_engine
= ENGINE_by_id(ssl_client_engine_id
);
641 if (!ssl_client_engine
) {
642 BIO_printf(bio_err
, "Error getting client auth engine\n");
647 if (!app_passwd(bio_err
, passarg
, NULL
, &pass
, NULL
)) {
648 BIO_printf(bio_err
, "Error getting password\n");
652 if (key_file
== NULL
)
653 key_file
= cert_file
;
657 key
= load_key(bio_err
, key_file
, key_format
, 0, pass
, e
,
658 "client certificate private key file");
660 ERR_print_errors(bio_err
);
667 cert
= load_cert(bio_err
, cert_file
, cert_format
,
668 NULL
, e
, "client certificate file");
671 ERR_print_errors(bio_err
);
676 if (!app_RAND_load_file(NULL
, bio_err
, 1) && inrand
== NULL
679 "warning, not much extra random data, consider using the -rand option\n");
682 BIO_printf(bio_err
, "%ld semi-random bytes loaded\n",
683 app_RAND_load_files(inrand
));
685 if (bio_c_out
== NULL
) {
686 if (c_quiet
&& !c_debug
&& !c_msg
) {
687 bio_c_out
= BIO_new(BIO_s_null());
689 if (bio_c_out
== NULL
)
690 bio_c_out
= BIO_new_fp(stdout
, BIO_NOCLOSE
);
694 ctx
= SSL_CTX_new(meth
);
696 ERR_print_errors(bio_err
);
699 #ifndef OPENSSL_NO_ENGINE
700 if (ssl_client_engine
) {
701 if (!SSL_CTX_set_client_cert_engine(ctx
, ssl_client_engine
)) {
702 BIO_puts(bio_err
, "Error setting client auth engine\n");
703 ERR_print_errors(bio_err
);
704 ENGINE_free(ssl_client_engine
);
707 ENGINE_free(ssl_client_engine
);
712 SSL_CTX_set_options(ctx
, SSL_OP_ALL
| off
);
714 SSL_CTX_set_options(ctx
, off
);
717 SSL_CTX_clear_options(ctx
, clr
);
719 * DTLS: partial reads end up discarding unread UDP bytes :-( Setting
720 * read ahead solves this problem.
722 if (sock_type
== SOCK_DGRAM
)
723 SSL_CTX_set_read_ahead(ctx
, 1);
726 SSL_CTX_set_info_callback(ctx
, apps_ssl_info_callback
);
728 if (!SSL_CTX_set_cipher_list(ctx
, cipher
)) {
729 BIO_printf(bio_err
, "error setting cipher list\n");
730 ERR_print_errors(bio_err
);
735 SSL_CTX_set_cipher_list(ctx
, getenv("SSL_CIPHER"));
738 SSL_CTX_set_verify(ctx
, verify
, verify_callback
);
739 if (!set_cert_key_stuff(ctx
, cert
, key
))
742 if ((!SSL_CTX_load_verify_locations(ctx
, CAfile
, CApath
)) ||
743 (!SSL_CTX_set_default_verify_paths(ctx
))) {
745 * BIO_printf(bio_err,"error setting default verify locations\n");
747 ERR_print_errors(bio_err
);
751 store
= SSL_CTX_get_cert_store(ctx
);
752 X509_STORE_set_flags(store
, vflags
);
753 #ifndef OPENSSL_NO_TLSEXT
754 if (servername
!= NULL
) {
755 tlsextcbp
.biodebug
= bio_err
;
756 SSL_CTX_set_tlsext_servername_callback(ctx
, ssl_servername_cb
);
757 SSL_CTX_set_tlsext_servername_arg(ctx
, &tlsextcbp
);
764 BIO
*stmp
= BIO_new_file(sess_in
, "r");
766 BIO_printf(bio_err
, "Can't open session file %s\n", sess_in
);
767 ERR_print_errors(bio_err
);
770 sess
= PEM_read_bio_SSL_SESSION(stmp
, NULL
, 0, NULL
);
773 BIO_printf(bio_err
, "Can't open session file %s\n", sess_in
);
774 ERR_print_errors(bio_err
);
777 SSL_set_session(con
, sess
);
778 SSL_SESSION_free(sess
);
782 SSL_set_mode(con
, SSL_MODE_SEND_FALLBACK_SCSV
);
784 #ifndef OPENSSL_NO_TLSEXT
785 if (servername
!= NULL
) {
786 if (!SSL_set_tlsext_host_name(con
, servername
)) {
787 BIO_printf(bio_err
, "Unable to set TLS servername extension.\n");
788 ERR_print_errors(bio_err
);
794 #ifndef OPENSSL_NO_KRB5
795 if (con
&& (con
->kssl_ctx
= kssl_ctx_new()) != NULL
) {
796 kssl_ctx_setstring(con
->kssl_ctx
, KSSL_SERVER
, host
);
798 #endif /* OPENSSL_NO_KRB5 */
799 /* SSL_set_cipher_list(con,"RC4-MD5"); */
803 if (init_client(&s
, host
, port
, sock_type
) == 0) {
804 BIO_printf(bio_err
, "connect:errno=%d\n", get_last_socket_error());
808 BIO_printf(bio_c_out
, "CONNECTED(%08X)\n", s
);
813 BIO_printf(bio_c_out
, "turning on non blocking io\n");
814 if (BIO_socket_ioctl(s
, FIONBIO
, &l
) < 0) {
815 ERR_print_errors(bio_err
);
823 if (SSL_version(con
) == DTLS1_VERSION
) {
825 sbio
= BIO_new_dgram(s
, BIO_NOCLOSE
);
826 if (getsockname(s
, &peer
, (void *)&peerlen
) < 0) {
827 BIO_printf(bio_err
, "getsockname:errno=%d\n",
828 get_last_socket_error());
833 (void)BIO_ctrl_set_connected(sbio
, 1, &peer
);
835 if (enable_timeouts
) {
837 timeout
.tv_usec
= DGRAM_RCV_TIMEOUT
;
838 BIO_ctrl(sbio
, BIO_CTRL_DGRAM_SET_RECV_TIMEOUT
, 0, &timeout
);
841 timeout
.tv_usec
= DGRAM_SND_TIMEOUT
;
842 BIO_ctrl(sbio
, BIO_CTRL_DGRAM_SET_SEND_TIMEOUT
, 0, &timeout
);
845 if (socket_mtu
> 28) {
846 SSL_set_options(con
, SSL_OP_NO_QUERY_MTU
);
847 SSL_set_mtu(con
, socket_mtu
- 28);
849 /* want to do MTU discovery */
850 BIO_ctrl(sbio
, BIO_CTRL_DGRAM_MTU_DISCOVER
, 0, NULL
);
852 sbio
= BIO_new_socket(s
, BIO_NOCLOSE
);
857 test
= BIO_new(BIO_f_nbio_test());
858 sbio
= BIO_push(test
, sbio
);
863 BIO_set_callback(sbio
, bio_dump_callback
);
864 BIO_set_callback_arg(sbio
, (char *)bio_c_out
);
867 SSL_set_msg_callback(con
, msg_cb
);
868 SSL_set_msg_callback_arg(con
, bio_c_out
);
870 #ifndef OPENSSL_NO_TLSEXT
872 SSL_set_tlsext_debug_callback(con
, tlsext_cb
);
873 SSL_set_tlsext_debug_arg(con
, bio_c_out
);
876 SSL_set_tlsext_status_type(con
, TLSEXT_STATUSTYPE_ocsp
);
877 SSL_CTX_set_tlsext_status_cb(ctx
, ocsp_resp_cb
);
878 SSL_CTX_set_tlsext_status_arg(ctx
, bio_c_out
);
881 STACK_OF(OCSP_RESPID
) *ids
= sk_OCSP_RESPID_new_null();
882 OCSP_RESPID
*id
= OCSP_RESPID_new();
883 id
->value
.byKey
= ASN1_OCTET_STRING_new();
884 id
->type
= V_OCSP_RESPID_KEY
;
885 ASN1_STRING_set(id
->value
.byKey
, "Hello World", -1);
886 sk_OCSP_RESPID_push(ids
, id
);
887 SSL_set_tlsext_status_ids(con
, ids
);
892 #ifndef OPENSSL_NO_JPAKE
894 jpake_client_auth(bio_c_out
, sbio
, jpake_secret
);
897 SSL_set_bio(con
, sbio
, sbio
);
898 SSL_set_connect_state(con
);
900 /* ok, lets connect */
901 width
= SSL_get_fd(con
) + 1;
914 /* This is an ugly hack that does a lot of assumptions */
916 * We do have to handle multi-line responses which may come in a single
917 * packet or not. We therefore have to use BIO_gets() which does need a
918 * buffering BIO. So during the initial chitchat we do push a buffering
919 * BIO into the chain that is removed again later on to not disturb the
920 * rest of the s_client operation.
922 if (starttls_proto
== PROTO_SMTP
) {
924 BIO
*fbio
= BIO_new(BIO_f_buffer());
925 BIO_push(fbio
, sbio
);
926 /* wait for multi-line response to end from SMTP */
928 mbuf_len
= BIO_gets(fbio
, mbuf
, BUFSIZZ
);
930 while (mbuf_len
> 3 && mbuf
[3] == '-');
931 /* STARTTLS command requires EHLO... */
932 BIO_printf(fbio
, "EHLO openssl.client.net\r\n");
933 (void)BIO_flush(fbio
);
934 /* wait for multi-line response to end EHLO SMTP response */
936 mbuf_len
= BIO_gets(fbio
, mbuf
, BUFSIZZ
);
937 if (strstr(mbuf
, "STARTTLS"))
940 while (mbuf_len
> 3 && mbuf
[3] == '-');
941 (void)BIO_flush(fbio
);
946 "didn't found starttls in server response,"
948 BIO_printf(sbio
, "STARTTLS\r\n");
949 BIO_read(sbio
, sbuf
, BUFSIZZ
);
950 } else if (starttls_proto
== PROTO_POP3
) {
951 BIO_read(sbio
, mbuf
, BUFSIZZ
);
952 BIO_printf(sbio
, "STLS\r\n");
953 BIO_read(sbio
, sbuf
, BUFSIZZ
);
954 } else if (starttls_proto
== PROTO_IMAP
) {
956 BIO
*fbio
= BIO_new(BIO_f_buffer());
957 BIO_push(fbio
, sbio
);
958 BIO_gets(fbio
, mbuf
, BUFSIZZ
);
959 /* STARTTLS command requires CAPABILITY... */
960 BIO_printf(fbio
, ". CAPABILITY\r\n");
961 (void)BIO_flush(fbio
);
962 /* wait for multi-line CAPABILITY response */
964 mbuf_len
= BIO_gets(fbio
, mbuf
, BUFSIZZ
);
965 if (strstr(mbuf
, "STARTTLS"))
968 while (mbuf_len
> 3 && mbuf
[0] != '.');
969 (void)BIO_flush(fbio
);
974 "didn't found STARTTLS in server response,"
976 BIO_printf(sbio
, ". STARTTLS\r\n");
977 BIO_read(sbio
, sbuf
, BUFSIZZ
);
978 } else if (starttls_proto
== PROTO_FTP
) {
979 BIO
*fbio
= BIO_new(BIO_f_buffer());
980 BIO_push(fbio
, sbio
);
981 /* wait for multi-line response to end from FTP */
983 mbuf_len
= BIO_gets(fbio
, mbuf
, BUFSIZZ
);
985 while (mbuf_len
> 3 && mbuf
[3] == '-');
986 (void)BIO_flush(fbio
);
989 BIO_printf(sbio
, "AUTH TLS\r\n");
990 BIO_read(sbio
, sbuf
, BUFSIZZ
);
992 if (starttls_proto
== PROTO_XMPP
) {
994 BIO_printf(sbio
, "<stream:stream "
995 "xmlns:stream='http://etherx.jabber.org/streams' "
996 "xmlns='jabber:client' to='%s' version='1.0'>", host
);
997 seen
= BIO_read(sbio
, mbuf
, BUFSIZZ
);
1000 (mbuf
, "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'")) {
1001 if (strstr(mbuf
, "/stream:features>"))
1003 seen
= BIO_read(sbio
, mbuf
, BUFSIZZ
);
1007 "<starttls xmlns='urn:ietf:params:xml:ns:xmpp-tls'/>");
1008 seen
= BIO_read(sbio
, sbuf
, BUFSIZZ
);
1010 if (!strstr(sbuf
, "<proceed"))
1019 if ((SSL_version(con
) == DTLS1_VERSION
) &&
1020 DTLSv1_get_timeout(con
, &timeout
))
1021 timeoutp
= &timeout
;
1025 if (SSL_in_init(con
) && !SSL_total_renegotiations(con
)) {
1033 BIO
*stmp
= BIO_new_file(sess_out
, "w");
1035 PEM_write_bio_SSL_SESSION(stmp
, SSL_get_session(con
));
1038 BIO_printf(bio_err
, "Error writing session file %s\n",
1041 print_stuff(bio_c_out
, con
, full_log
);
1045 if (starttls_proto
) {
1046 BIO_printf(bio_err
, "%s", mbuf
);
1047 /* We don't need to know any more */
1048 starttls_proto
= PROTO_OFF
;
1053 BIO_printf(bio_c_out
,
1054 "drop connection and then reconnect\n");
1056 SSL_set_connect_state(con
);
1057 SHUTDOWN(SSL_get_fd(con
));
1063 ssl_pending
= read_ssl
&& SSL_pending(con
);
1066 #if !defined(OPENSSL_SYS_WINDOWS) && !defined(OPENSSL_SYS_MSDOS) && !defined(OPENSSL_SYS_NETWARE)
1069 FD_SET(fileno(stdin
), &readfds
);
1071 FD_SET(fileno(stdout
), &writefds
);
1074 FD_SET(SSL_get_fd(con
), &readfds
);
1076 FD_SET(SSL_get_fd(con
), &writefds
);
1078 if (!tty_on
|| !write_tty
) {
1080 FD_SET(SSL_get_fd(con
), &readfds
);
1082 FD_SET(SSL_get_fd(con
), &writefds
);
1085 /*- printf("mode tty(%d %d%d) ssl(%d%d)\n",
1086 tty_on,read_tty,write_tty,read_ssl,write_ssl);*/
1089 * Note: under VMS with SOCKETSHR the second parameter is
1090 * currently of type (int *) whereas under other systems it is
1091 * (void *) if you don't have a cast it will choke the compiler:
1092 * if you do have a cast then you can either go for (int *) or
1095 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
1097 * Under Windows/DOS we make the assumption that we can always
1098 * write to the tty: therefore if we need to write to the tty we
1099 * just fall through. Otherwise we timeout the select every
1100 * second and see if there are any keypresses. Note: this is a
1101 * hack, in a proper Windows application we wouldn't do this.
1108 i
= select(width
, (void *)&readfds
, (void *)&writefds
,
1110 # if defined(OPENSSL_SYS_WINCE) || defined(OPENSSL_SYS_MSDOS)
1111 if (!i
&& (!_kbhit() || !read_tty
))
1114 if (!i
&& (!((_kbhit())
1115 || (WAIT_OBJECT_0
==
1116 WaitForSingleObject(GetStdHandle
1123 i
= select(width
, (void *)&readfds
, (void *)&writefds
,
1126 #elif defined(OPENSSL_SYS_NETWARE)
1131 i
= select(width
, (void *)&readfds
, (void *)&writefds
,
1134 i
= select(width
, (void *)&readfds
, (void *)&writefds
,
1138 i
= select(width
, (void *)&readfds
, (void *)&writefds
,
1142 BIO_printf(bio_err
, "bad select %d\n",
1143 get_last_socket_error());
1149 if ((SSL_version(con
) == DTLS1_VERSION
)
1150 && DTLSv1_handle_timeout(con
) > 0) {
1151 BIO_printf(bio_err
, "TIMEOUT occured\n");
1154 if (!ssl_pending
&& FD_ISSET(SSL_get_fd(con
), &writefds
)) {
1155 k
= SSL_write(con
, &(cbuf
[cbuf_off
]), (unsigned int)cbuf_len
);
1156 switch (SSL_get_error(con
, k
)) {
1157 case SSL_ERROR_NONE
:
1162 /* we have done a write(con,NULL,0); */
1163 if (cbuf_len
<= 0) {
1166 } else { /* if (cbuf_len > 0) */
1172 case SSL_ERROR_WANT_WRITE
:
1173 BIO_printf(bio_c_out
, "write W BLOCK\n");
1177 case SSL_ERROR_WANT_READ
:
1178 BIO_printf(bio_c_out
, "write R BLOCK\n");
1183 case SSL_ERROR_WANT_X509_LOOKUP
:
1184 BIO_printf(bio_c_out
, "write X BLOCK\n");
1186 case SSL_ERROR_ZERO_RETURN
:
1187 if (cbuf_len
!= 0) {
1188 BIO_printf(bio_c_out
, "shutdown\n");
1196 case SSL_ERROR_SYSCALL
:
1197 if ((k
!= 0) || (cbuf_len
!= 0)) {
1198 BIO_printf(bio_err
, "write:errno=%d\n",
1199 get_last_socket_error());
1207 ERR_print_errors(bio_err
);
1211 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS) || defined(OPENSSL_SYS_NETWARE)
1212 /* Assume Windows/DOS can always write */
1213 else if (!ssl_pending
&& write_tty
)
1215 else if (!ssl_pending
&& FD_ISSET(fileno(stdout
), &writefds
))
1218 #ifdef CHARSET_EBCDIC
1219 ascii2ebcdic(&(sbuf
[sbuf_off
]), &(sbuf
[sbuf_off
]), sbuf_len
);
1221 i
= write(fileno(stdout
), &(sbuf
[sbuf_off
]), sbuf_len
);
1224 BIO_printf(bio_c_out
, "DONE\n");
1231 if (sbuf_len
<= 0) {
1235 } else if (ssl_pending
|| FD_ISSET(SSL_get_fd(con
), &readfds
)) {
1240 SSL_renegotiate(con
);
1246 k
= SSL_read(con
, sbuf
, 1024 /* BUFSIZZ */ );
1248 /* Demo for pending and peek :-) */
1249 k
= SSL_read(con
, sbuf
, 16);
1252 printf("read=%d pending=%d peek=%d\n", k
, SSL_pending(con
),
1253 SSL_peek(con
, zbuf
, 10240));
1257 switch (SSL_get_error(con
, k
)) {
1258 case SSL_ERROR_NONE
:
1267 case SSL_ERROR_WANT_WRITE
:
1268 BIO_printf(bio_c_out
, "read W BLOCK\n");
1272 case SSL_ERROR_WANT_READ
:
1273 BIO_printf(bio_c_out
, "read R BLOCK\n");
1276 if ((read_tty
== 0) && (write_ssl
== 0))
1279 case SSL_ERROR_WANT_X509_LOOKUP
:
1280 BIO_printf(bio_c_out
, "read X BLOCK\n");
1282 case SSL_ERROR_SYSCALL
:
1283 BIO_printf(bio_err
, "read:errno=%d\n",
1284 get_last_socket_error());
1286 case SSL_ERROR_ZERO_RETURN
:
1287 BIO_printf(bio_c_out
, "closed\n");
1290 ERR_print_errors(bio_err
);
1295 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_MSDOS)
1296 # if defined(OPENSSL_SYS_WINCE) || defined(OPENSSL_SYS_MSDOS)
1300 || (WAIT_OBJECT_0
==
1301 WaitForSingleObject(GetStdHandle(STD_INPUT_HANDLE
), 0)))
1303 #elif defined (OPENSSL_SYS_NETWARE)
1306 else if (FD_ISSET(fileno(stdin
), &readfds
))
1312 i
= read(fileno(stdin
), cbuf
, BUFSIZZ
/ 2);
1314 /* both loops are skipped when i <= 0 */
1315 for (j
= 0; j
< i
; j
++)
1316 if (cbuf
[j
] == '\n')
1318 for (j
= i
- 1; j
>= 0; j
--) {
1319 cbuf
[j
+ lf_num
] = cbuf
[j
];
1320 if (cbuf
[j
] == '\n') {
1323 cbuf
[j
+ lf_num
] = '\r';
1326 assert(lf_num
== 0);
1328 i
= read(fileno(stdin
), cbuf
, BUFSIZZ
);
1330 if ((!c_ign_eof
) && ((i
<= 0) || (cbuf
[0] == 'Q'))) {
1331 BIO_printf(bio_err
, "DONE\n");
1335 if ((!c_ign_eof
) && (cbuf
[0] == 'R')) {
1336 BIO_printf(bio_err
, "RENEGOTIATING\n");
1337 SSL_renegotiate(con
);
1342 #ifdef CHARSET_EBCDIC
1343 ebcdic2ascii(cbuf
, cbuf
, i
);
1353 SHUTDOWN(SSL_get_fd(con
));
1357 print_stuff(bio_c_out
, con
, 1);
1371 OPENSSL_cleanse(cbuf
, BUFSIZZ
);
1375 OPENSSL_cleanse(sbuf
, BUFSIZZ
);
1379 OPENSSL_cleanse(mbuf
, BUFSIZZ
);
1382 if (bio_c_out
!= NULL
) {
1383 BIO_free(bio_c_out
);
1390 static void print_stuff(BIO
*bio
, SSL
*s
, int full
)
1394 static const char *space
= " ";
1397 STACK_OF(X509_NAME
) *sk2
;
1401 #ifndef OPENSSL_NO_COMP
1402 const COMP_METHOD
*comp
, *expansion
;
1406 int got_a_chain
= 0;
1408 sk
= SSL_get_peer_cert_chain(s
);
1410 got_a_chain
= 1; /* we don't have it for SSL2 (yet) */
1412 BIO_printf(bio
, "---\nCertificate chain\n");
1413 for (i
= 0; i
< sk_X509_num(sk
); i
++) {
1414 X509_NAME_oneline(X509_get_subject_name(sk_X509_value(sk
, i
)),
1416 BIO_printf(bio
, "%2d s:%s\n", i
, buf
);
1417 X509_NAME_oneline(X509_get_issuer_name(sk_X509_value(sk
, i
)),
1419 BIO_printf(bio
, " i:%s\n", buf
);
1421 PEM_write_bio_X509(bio
, sk_X509_value(sk
, i
));
1425 BIO_printf(bio
, "---\n");
1426 peer
= SSL_get_peer_certificate(s
);
1428 BIO_printf(bio
, "Server certificate\n");
1430 /* Redundant if we showed the whole chain */
1431 if (!(c_showcerts
&& got_a_chain
))
1432 PEM_write_bio_X509(bio
, peer
);
1433 X509_NAME_oneline(X509_get_subject_name(peer
), buf
, sizeof buf
);
1434 BIO_printf(bio
, "subject=%s\n", buf
);
1435 X509_NAME_oneline(X509_get_issuer_name(peer
), buf
, sizeof buf
);
1436 BIO_printf(bio
, "issuer=%s\n", buf
);
1438 BIO_printf(bio
, "no peer certificate available\n");
1440 sk2
= SSL_get_client_CA_list(s
);
1441 if ((sk2
!= NULL
) && (sk_X509_NAME_num(sk2
) > 0)) {
1442 BIO_printf(bio
, "---\nAcceptable client certificate CA names\n");
1443 for (i
= 0; i
< sk_X509_NAME_num(sk2
); i
++) {
1444 xn
= sk_X509_NAME_value(sk2
, i
);
1445 X509_NAME_oneline(xn
, buf
, sizeof(buf
));
1446 BIO_write(bio
, buf
, strlen(buf
));
1447 BIO_write(bio
, "\n", 1);
1450 BIO_printf(bio
, "---\nNo client certificate CA names sent\n");
1452 p
= SSL_get_shared_ciphers(s
, buf
, sizeof buf
);
1455 * This works only for SSL 2. In later protocol versions, the
1456 * client does not know what other ciphers (in addition to the
1457 * one to be used in the current connection) the server supports.
1461 "---\nCiphers common between both SSL endpoints:\n");
1465 BIO_write(bio
, space
, 15 - j
% 25);
1468 BIO_write(bio
, ((i
% 3) ? " " : "\n"), 1);
1470 BIO_write(bio
, p
, 1);
1475 BIO_write(bio
, "\n", 1);
1479 "---\nSSL handshake has read %ld bytes and written %ld bytes\n",
1480 BIO_number_read(SSL_get_rbio(s
)),
1481 BIO_number_written(SSL_get_wbio(s
)));
1483 BIO_printf(bio
, ((s
->hit
) ? "---\nReused, " : "---\nNew, "));
1484 c
= SSL_get_current_cipher(s
);
1485 BIO_printf(bio
, "%s, Cipher is %s\n",
1486 SSL_CIPHER_get_version(c
), SSL_CIPHER_get_name(c
));
1489 pktmp
= X509_get_pubkey(peer
);
1490 BIO_printf(bio
, "Server public key is %d bit\n",
1491 EVP_PKEY_bits(pktmp
));
1492 EVP_PKEY_free(pktmp
);
1494 BIO_printf(bio
, "Secure Renegotiation IS%s supported\n",
1495 SSL_get_secure_renegotiation_support(s
) ? "" : " NOT");
1496 #ifndef OPENSSL_NO_COMP
1497 comp
= SSL_get_current_compression(s
);
1498 expansion
= SSL_get_current_expansion(s
);
1499 BIO_printf(bio
, "Compression: %s\n",
1500 comp
? SSL_COMP_get_name(comp
) : "NONE");
1501 BIO_printf(bio
, "Expansion: %s\n",
1502 expansion
? SSL_COMP_get_name(expansion
) : "NONE");
1504 SSL_SESSION_print(bio
, SSL_get_session(s
));
1505 BIO_printf(bio
, "---\n");
1508 /* flush, or debugging output gets mixed with http response */
1509 (void)BIO_flush(bio
);
1512 #ifndef OPENSSL_NO_TLSEXT
1514 static int ocsp_resp_cb(SSL
*s
, void *arg
)
1516 const unsigned char *p
;
1519 len
= SSL_get_tlsext_status_ocsp_resp(s
, &p
);
1520 BIO_puts(arg
, "OCSP response: ");
1522 BIO_puts(arg
, "no response sent\n");
1525 rsp
= d2i_OCSP_RESPONSE(NULL
, &p
, len
);
1527 BIO_puts(arg
, "response parse error\n");
1528 BIO_dump_indent(arg
, (char *)p
, len
, 4);
1531 BIO_puts(arg
, "\n======================================\n");
1532 OCSP_RESPONSE_print(arg
, rsp
, 0);
1533 BIO_puts(arg
, "======================================\n");
1534 OCSP_RESPONSE_free(rsp
);
1537 #endif /* ndef OPENSSL_NO_TLSEXT */