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) 1998-2006 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).
113 #include "ssl_locl.h"
114 #include <openssl/buffer.h>
115 #include <openssl/rand.h>
116 #include <openssl/objects.h>
117 #include <openssl/evp.h>
119 static const SSL_METHOD
*ssl23_get_client_method(int ver
);
120 static int ssl23_client_hello(SSL
*s
);
121 static int ssl23_get_server_hello(SSL
*s
);
122 static const SSL_METHOD
*ssl23_get_client_method(int ver
)
124 #ifndef OPENSSL_NO_SSL2
125 if (ver
== SSL2_VERSION
)
126 return (SSLv2_client_method());
128 #ifndef OPENSSL_NO_SSL3
129 if (ver
== SSL3_VERSION
)
130 return (SSLv3_client_method());
132 if (ver
== TLS1_VERSION
)
133 return (TLSv1_client_method());
134 else if (ver
== TLS1_1_VERSION
)
135 return (TLSv1_1_client_method());
136 else if (ver
== TLS1_2_VERSION
)
137 return (TLSv1_2_client_method());
142 IMPLEMENT_ssl23_meth_func(SSLv23_client_method
,
143 ssl_undefined_function
,
144 ssl23_connect
, ssl23_get_client_method
)
146 int ssl23_connect(SSL
*s
)
149 unsigned long Time
= (unsigned long)time(NULL
);
150 void (*cb
) (const SSL
*ssl
, int type
, int val
) = NULL
;
152 int new_state
, state
;
154 RAND_add(&Time
, sizeof(Time
), 0);
158 if (s
->info_callback
!= NULL
)
159 cb
= s
->info_callback
;
160 else if (s
->ctx
->info_callback
!= NULL
)
161 cb
= s
->ctx
->info_callback
;
164 if (!SSL_in_init(s
) || SSL_in_before(s
))
173 case SSL_ST_BEFORE
| SSL_ST_CONNECT
:
174 case SSL_ST_OK
| SSL_ST_CONNECT
:
176 if (s
->session
!= NULL
) {
177 SSLerr(SSL_F_SSL23_CONNECT
,
178 SSL_R_SSL23_DOING_SESSION_ID_REUSE
);
184 cb(s
, SSL_CB_HANDSHAKE_START
, 1);
186 /* s->version=TLS1_VERSION; */
187 s
->type
= SSL_ST_CONNECT
;
189 if (s
->init_buf
== NULL
) {
190 if ((buf
= BUF_MEM_new()) == NULL
) {
194 if (!BUF_MEM_grow(buf
, SSL3_RT_MAX_PLAIN_LENGTH
)) {
202 if (!ssl3_setup_buffers(s
)) {
207 ssl3_init_finished_mac(s
);
209 s
->state
= SSL23_ST_CW_CLNT_HELLO_A
;
210 s
->ctx
->stats
.sess_connect
++;
214 case SSL23_ST_CW_CLNT_HELLO_A
:
215 case SSL23_ST_CW_CLNT_HELLO_B
:
218 ret
= ssl23_client_hello(s
);
221 s
->state
= SSL23_ST_CR_SRVR_HELLO_A
;
226 case SSL23_ST_CR_SRVR_HELLO_A
:
227 case SSL23_ST_CR_SRVR_HELLO_B
:
228 ret
= ssl23_get_server_hello(s
);
235 SSLerr(SSL_F_SSL23_CONNECT
, SSL_R_UNKNOWN_STATE
);
242 (void)BIO_flush(s
->wbio
);
245 if ((cb
!= NULL
) && (s
->state
!= state
)) {
246 new_state
= s
->state
;
248 cb(s
, SSL_CB_CONNECT_LOOP
, 1);
249 s
->state
= new_state
;
257 cb(s
, SSL_CB_CONNECT_EXIT
, ret
);
261 static int ssl23_no_ssl2_ciphers(SSL
*s
)
264 STACK_OF(SSL_CIPHER
) *ciphers
;
266 ciphers
= SSL_get_ciphers(s
);
267 for (i
= 0; i
< sk_SSL_CIPHER_num(ciphers
); i
++) {
268 cipher
= sk_SSL_CIPHER_value(ciphers
, i
);
269 if (cipher
->algorithm_ssl
== SSL_SSLV2
)
276 * Fill a ClientRandom or ServerRandom field of length len. Returns <= 0 on
277 * failure, 1 on success.
279 int ssl_fill_hello_random(SSL
*s
, int server
, unsigned char *result
, int len
)
286 send_time
= (s
->mode
& SSL_MODE_SEND_SERVERHELLO_TIME
) != 0;
288 send_time
= (s
->mode
& SSL_MODE_SEND_CLIENTHELLO_TIME
) != 0;
290 unsigned long Time
= (unsigned long)time(NULL
);
291 unsigned char *p
= result
;
293 return RAND_pseudo_bytes(p
, len
- 4);
295 return RAND_pseudo_bytes(result
, len
);
298 static int ssl23_client_hello(SSL
*s
)
301 unsigned char *p
, *d
;
305 int version
= 0, version_major
, version_minor
;
306 #ifndef OPENSSL_NO_COMP
311 unsigned long mask
, options
= s
->options
;
313 ssl2_compat
= (options
& SSL_OP_NO_SSLv2
) ? 0 : 1;
315 if (ssl2_compat
&& ssl23_no_ssl2_ciphers(s
))
319 * SSL_OP_NO_X disables all protocols above X *if* there are
320 * some protocols below X enabled. This is required in order
321 * to maintain "version capability" vector contiguous. So
322 * that if application wants to disable TLS1.0 in favour of
323 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
324 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
326 mask
= SSL_OP_NO_TLSv1_1
| SSL_OP_NO_TLSv1
327 #if !defined(OPENSSL_NO_SSL3)
330 #if !defined(OPENSSL_NO_SSL2)
331 | (ssl2_compat
? SSL_OP_NO_SSLv2
: 0)
334 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
335 version
= TLS1_2_VERSION
;
337 if ((options
& SSL_OP_NO_TLSv1_2
) && (options
& mask
) != mask
)
338 version
= TLS1_1_VERSION
;
340 version
= TLS1_1_VERSION
;
342 mask
&= ~SSL_OP_NO_TLSv1_1
;
343 if ((options
& SSL_OP_NO_TLSv1_1
) && (options
& mask
) != mask
)
344 version
= TLS1_VERSION
;
345 mask
&= ~SSL_OP_NO_TLSv1
;
346 #if !defined(OPENSSL_NO_SSL3)
347 if ((options
& SSL_OP_NO_TLSv1
) && (options
& mask
) != mask
)
348 version
= SSL3_VERSION
;
349 mask
&= ~SSL_OP_NO_SSLv3
;
351 #if !defined(OPENSSL_NO_SSL2)
352 if ((options
& SSL_OP_NO_SSLv3
) && (options
& mask
) != mask
)
353 version
= SSL2_VERSION
;
356 #ifndef OPENSSL_NO_TLSEXT
357 if (version
!= SSL2_VERSION
) {
359 * have to disable SSL 2.0 compatibility if we need TLS extensions
362 if (s
->tlsext_hostname
!= NULL
)
364 if (s
->tlsext_status_type
!= -1)
366 # ifdef TLSEXT_TYPE_opaque_prf_input
367 if (s
->ctx
->tlsext_opaque_prf_input_callback
!= 0
368 || s
->tlsext_opaque_prf_input
!= NULL
)
374 buf
= (unsigned char *)s
->init_buf
->data
;
375 if (s
->state
== SSL23_ST_CW_CLNT_HELLO_A
) {
377 /* don't reuse session-id's */
378 if (!ssl_get_new_session(s
, 0)) {
383 p
= s
->s3
->client_random
;
384 if (ssl_fill_hello_random(s
, 0, p
, SSL3_RANDOM_SIZE
) <= 0)
387 if (version
== TLS1_2_VERSION
) {
388 version_major
= TLS1_2_VERSION_MAJOR
;
389 version_minor
= TLS1_2_VERSION_MINOR
;
390 } else if (version
== TLS1_1_VERSION
) {
391 version_major
= TLS1_1_VERSION_MAJOR
;
392 version_minor
= TLS1_1_VERSION_MINOR
;
393 } else if (version
== TLS1_VERSION
) {
394 version_major
= TLS1_VERSION_MAJOR
;
395 version_minor
= TLS1_VERSION_MINOR
;
398 else if (FIPS_mode()) {
399 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,
400 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
404 else if (version
== SSL3_VERSION
) {
405 version_major
= SSL3_VERSION_MAJOR
;
406 version_minor
= SSL3_VERSION_MINOR
;
407 } else if (version
== SSL2_VERSION
) {
408 version_major
= SSL2_VERSION_MAJOR
;
409 version_minor
= SSL2_VERSION_MINOR
;
411 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_PROTOCOLS_AVAILABLE
);
415 s
->client_version
= version
;
418 /* create SSL 2.0 compatible Client Hello */
420 /* two byte record header will be written last */
422 p
= d
+ 9; /* leave space for message type, version,
423 * individual length fields */
425 *(d
++) = SSL2_MT_CLIENT_HELLO
;
426 *(d
++) = version_major
;
427 *(d
++) = version_minor
;
429 /* Ciphers supported */
430 i
= ssl_cipher_list_to_bytes(s
, SSL_get_ciphers(s
), p
, 0);
433 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_CIPHERS_AVAILABLE
);
440 * put in the session-id length (zero since there is no reuse)
443 s
->session
->session_id_length
= 0;
447 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
448 ch_len
= SSL2_CHALLENGE_LENGTH
;
450 ch_len
= SSL2_MAX_CHALLENGE_LENGTH
;
452 /* write out sslv2 challenge */
454 * Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because it
455 * is one of SSL2_MAX_CHALLENGE_LENGTH (32) or
456 * SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for
459 if (SSL3_RANDOM_SIZE
< ch_len
)
460 i
= SSL3_RANDOM_SIZE
;
464 memset(&(s
->s3
->client_random
[0]), 0, SSL3_RANDOM_SIZE
);
465 if (RAND_pseudo_bytes
466 (&(s
->s3
->client_random
[SSL3_RANDOM_SIZE
- i
]), i
) <= 0)
469 memcpy(p
, &(s
->s3
->client_random
[SSL3_RANDOM_SIZE
- i
]), i
);
473 buf
[0] = ((i
>> 8) & 0xff) | 0x80;
476 /* number of bytes to write */
480 ssl3_finish_mac(s
, &(buf
[2]), i
);
482 /* create Client Hello in SSL 3.0/TLS 1.0 format */
485 * do the record header (5 bytes) and handshake message header (4
490 *(p
++) = version_major
;
491 *(p
++) = version_minor
;
494 memcpy(p
, s
->s3
->client_random
, SSL3_RANDOM_SIZE
);
495 p
+= SSL3_RANDOM_SIZE
;
497 /* Session ID (zero since there is no reuse) */
500 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
501 i
= ssl_cipher_list_to_bytes(s
, SSL_get_ciphers(s
), &(p
[2]),
502 ssl3_put_cipher_by_char
);
504 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_CIPHERS_AVAILABLE
);
507 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
509 * Some servers hang if client hello > 256 bytes as hack
510 * workaround chop number of supported ciphers to keep it well
511 * below this if we use TLS v1.2
513 if (TLS1_get_version(s
) >= TLS1_2_VERSION
514 && i
> OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
)
515 i
= OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
& ~1;
521 #ifdef OPENSSL_NO_COMP
524 if ((s
->options
& SSL_OP_NO_COMPRESSION
)
525 || !s
->ctx
->comp_methods
)
528 j
= sk_SSL_COMP_num(s
->ctx
->comp_methods
);
530 for (i
= 0; i
< j
; i
++) {
531 comp
= sk_SSL_COMP_value(s
->ctx
->comp_methods
, i
);
535 *(p
++) = 0; /* Add the NULL method */
537 #ifndef OPENSSL_NO_TLSEXT
539 if (ssl_prepare_clienthello_tlsext(s
) <= 0) {
540 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_CLIENTHELLO_TLSEXT
);
544 ssl_add_clienthello_tlsext(s
, p
,
546 SSL3_RT_MAX_PLAIN_LENGTH
)) ==
548 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
555 /* fill in 4-byte handshake header */
557 *(d
++) = SSL3_MT_CLIENT_HELLO
;
562 if (l
> SSL3_RT_MAX_PLAIN_LENGTH
) {
563 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
567 /* fill in 5-byte record header */
569 *(d
++) = SSL3_RT_HANDSHAKE
;
570 *(d
++) = version_major
;
572 * Some servers hang if we use long client hellos and a record
575 if (TLS1_get_client_version(s
) > TLS1_VERSION
)
578 *(d
++) = version_minor
;
581 /* number of bytes to write */
582 s
->init_num
= p
- buf
;
585 ssl3_finish_mac(s
, &(buf
[5]), s
->init_num
- 5);
588 s
->state
= SSL23_ST_CW_CLNT_HELLO_B
;
592 /* SSL3_ST_CW_CLNT_HELLO_B */
593 ret
= ssl23_write_bytes(s
);
595 if ((ret
>= 2) && s
->msg_callback
) {
596 /* Client Hello has been sent; tell msg_callback */
599 s
->msg_callback(1, SSL2_VERSION
, 0, s
->init_buf
->data
+ 2,
600 ret
- 2, s
, s
->msg_callback_arg
);
602 s
->msg_callback(1, version
, SSL3_RT_HANDSHAKE
,
603 s
->init_buf
->data
+ 5, ret
- 5, s
,
604 s
->msg_callback_arg
);
610 static int ssl23_get_server_hello(SSL
*s
)
617 n
= ssl23_read_bytes(s
, 7);
625 if ((p
[0] & 0x80) && (p
[2] == SSL2_MT_SERVER_HELLO
) &&
626 (p
[5] == 0x00) && (p
[6] == 0x02)) {
627 #ifdef OPENSSL_NO_SSL2
628 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
631 /* we are talking sslv2 */
633 * we need to clean up the SSLv3 setup and put in the sslv2 stuff.
637 if (s
->options
& SSL_OP_NO_SSLv2
) {
638 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
647 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
648 ch_len
= SSL2_CHALLENGE_LENGTH
;
650 ch_len
= SSL2_MAX_CHALLENGE_LENGTH
;
652 /* write out sslv2 challenge */
654 * Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because it is
655 * one of SSL2_MAX_CHALLENGE_LENGTH (32) or SSL2_MAX_CHALLENGE_LENGTH
656 * (16), but leave the check in for futurproofing
658 i
= (SSL3_RANDOM_SIZE
< ch_len
)
659 ? SSL3_RANDOM_SIZE
: ch_len
;
660 s
->s2
->challenge_length
= i
;
661 memcpy(s
->s2
->challenge
,
662 &(s
->s3
->client_random
[SSL3_RANDOM_SIZE
- i
]), i
);
667 if (!BUF_MEM_grow_clean(s
->init_buf
,
668 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
)) {
669 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, ERR_R_BUF_LIB
);
673 s
->state
= SSL2_ST_GET_SERVER_HELLO_A
;
674 if (!(s
->client_version
== SSL2_VERSION
))
676 * use special padding (SSL 3.0 draft/RFC 2246, App. E.2)
678 s
->s2
->ssl2_rollback
= 1;
681 * setup the 7 bytes we have read so we get them from the sslv2
684 s
->rstate
= SSL_ST_READ_HEADER
;
685 s
->packet_length
= n
;
686 s
->packet
= &(s
->s2
->rbuf
[0]);
687 memcpy(s
->packet
, buf
, n
);
688 s
->s2
->rbuf_left
= n
;
689 s
->s2
->rbuf_offs
= 0;
691 /* we have already written one */
692 s
->s2
->write_sequence
= 1;
694 s
->method
= SSLv2_client_method();
695 s
->handshake_func
= s
->method
->ssl_connect
;
697 } else if (p
[1] == SSL3_VERSION_MAJOR
&&
698 p
[2] <= TLS1_2_VERSION_MINOR
&&
699 ((p
[0] == SSL3_RT_HANDSHAKE
&& p
[5] == SSL3_MT_SERVER_HELLO
) ||
700 (p
[0] == SSL3_RT_ALERT
&& p
[3] == 0 && p
[4] == 2))) {
701 /* we have sslv3 or tls1 (server hello or alert) */
703 #ifndef OPENSSL_NO_SSL3
704 if ((p
[2] == SSL3_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_SSLv3
)) {
707 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,
708 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
712 s
->version
= SSL3_VERSION
;
713 s
->method
= SSLv3_client_method();
716 if ((p
[2] == TLS1_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_TLSv1
)) {
717 s
->version
= TLS1_VERSION
;
718 s
->method
= TLSv1_client_method();
719 } else if ((p
[2] == TLS1_1_VERSION_MINOR
) &&
720 !(s
->options
& SSL_OP_NO_TLSv1_1
)) {
721 s
->version
= TLS1_1_VERSION
;
722 s
->method
= TLSv1_1_client_method();
723 } else if ((p
[2] == TLS1_2_VERSION_MINOR
) &&
724 !(s
->options
& SSL_OP_NO_TLSv1_2
)) {
725 s
->version
= TLS1_2_VERSION
;
726 s
->method
= TLSv1_2_client_method();
728 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
732 /* ensure that TLS_MAX_VERSION is up-to-date */
733 OPENSSL_assert(s
->version
<= TLS_MAX_VERSION
);
735 if (p
[0] == SSL3_RT_ALERT
&& p
[5] != SSL3_AL_WARNING
) {
738 void (*cb
) (const SSL
*ssl
, int type
, int val
) = NULL
;
741 if (s
->info_callback
!= NULL
)
742 cb
= s
->info_callback
;
743 else if (s
->ctx
->info_callback
!= NULL
)
744 cb
= s
->ctx
->info_callback
;
749 cb(s
, SSL_CB_READ_ALERT
, j
);
753 s
->msg_callback(0, s
->version
, SSL3_RT_ALERT
, p
+ 5, 2, s
,
754 s
->msg_callback_arg
);
756 s
->rwstate
= SSL_NOTHING
;
757 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_AD_REASON_OFFSET
+ p
[6]);
761 if (!ssl_init_wbio_buffer(s
, 1))
764 /* we are in this state */
765 s
->state
= SSL3_ST_CR_SRVR_HELLO_A
;
768 * put the 7 bytes we have read into the input buffer for SSLv3
770 s
->rstate
= SSL_ST_READ_HEADER
;
771 s
->packet_length
= n
;
772 if (s
->s3
->rbuf
.buf
== NULL
)
773 if (!ssl3_setup_read_buffer(s
))
775 s
->packet
= &(s
->s3
->rbuf
.buf
[0]);
776 memcpy(s
->packet
, buf
, n
);
777 s
->s3
->rbuf
.left
= n
;
778 s
->s3
->rbuf
.offset
= 0;
780 s
->handshake_func
= s
->method
->ssl_connect
;
782 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNKNOWN_PROTOCOL
);
788 * Since, if we are sending a ssl23 client hello, we are not reusing a
791 if (!ssl_get_new_session(s
, 0))
794 return (SSL_connect(s
));