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
)
285 send_time
= (s
->mode
& SSL_MODE_SEND_SERVERHELLO_TIME
) != 0;
287 send_time
= (s
->mode
& SSL_MODE_SEND_CLIENTHELLO_TIME
) != 0;
289 unsigned long Time
= (unsigned long)time(NULL
);
290 unsigned char *p
= result
;
292 return RAND_pseudo_bytes(p
, len
- 4);
294 return RAND_pseudo_bytes(result
, len
);
297 static int ssl23_client_hello(SSL
*s
)
300 unsigned char *p
, *d
;
304 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
)
371 if (s
->cert
->cli_ext
.meths_count
!= 0)
376 buf
= (unsigned char *)s
->init_buf
->data
;
377 if (s
->state
== SSL23_ST_CW_CLNT_HELLO_A
) {
379 /* don't reuse session-id's */
380 if (!ssl_get_new_session(s
, 0)) {
385 p
= s
->s3
->client_random
;
386 if (ssl_fill_hello_random(s
, 0, p
, SSL3_RANDOM_SIZE
) <= 0)
389 if (version
== TLS1_2_VERSION
) {
390 version_major
= TLS1_2_VERSION_MAJOR
;
391 version_minor
= TLS1_2_VERSION_MINOR
;
392 } else if (tls1_suiteb(s
)) {
393 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,
394 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE
);
396 } else if (version
== TLS1_1_VERSION
) {
397 version_major
= TLS1_1_VERSION_MAJOR
;
398 version_minor
= TLS1_1_VERSION_MINOR
;
399 } else if (version
== TLS1_VERSION
) {
400 version_major
= TLS1_VERSION_MAJOR
;
401 version_minor
= TLS1_VERSION_MINOR
;
404 else if (FIPS_mode()) {
405 SSLerr(SSL_F_SSL23_CLIENT_HELLO
,
406 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
410 else if (version
== SSL3_VERSION
) {
411 version_major
= SSL3_VERSION_MAJOR
;
412 version_minor
= SSL3_VERSION_MINOR
;
413 } else if (version
== SSL2_VERSION
) {
414 version_major
= SSL2_VERSION_MAJOR
;
415 version_minor
= SSL2_VERSION_MINOR
;
417 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_PROTOCOLS_AVAILABLE
);
421 s
->client_version
= version
;
424 /* create SSL 2.0 compatible Client Hello */
426 /* two byte record header will be written last */
428 p
= d
+ 9; /* leave space for message type, version,
429 * individual length fields */
431 *(d
++) = SSL2_MT_CLIENT_HELLO
;
432 *(d
++) = version_major
;
433 *(d
++) = version_minor
;
435 /* Ciphers supported */
436 i
= ssl_cipher_list_to_bytes(s
, SSL_get_ciphers(s
), p
, 0);
439 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_CIPHERS_AVAILABLE
);
446 * put in the session-id length (zero since there is no reuse)
449 s
->session
->session_id_length
= 0;
453 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
454 ch_len
= SSL2_CHALLENGE_LENGTH
;
456 ch_len
= SSL2_MAX_CHALLENGE_LENGTH
;
458 /* write out sslv2 challenge */
460 * Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because it
461 * is one of SSL2_MAX_CHALLENGE_LENGTH (32) or
462 * SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for
465 if (SSL3_RANDOM_SIZE
< ch_len
)
466 i
= SSL3_RANDOM_SIZE
;
470 memset(&(s
->s3
->client_random
[0]), 0, SSL3_RANDOM_SIZE
);
471 if (RAND_pseudo_bytes
472 (&(s
->s3
->client_random
[SSL3_RANDOM_SIZE
- i
]), i
) <= 0)
475 memcpy(p
, &(s
->s3
->client_random
[SSL3_RANDOM_SIZE
- i
]), i
);
479 buf
[0] = ((i
>> 8) & 0xff) | 0x80;
482 /* number of bytes to write */
486 ssl3_finish_mac(s
, &(buf
[2]), i
);
488 /* create Client Hello in SSL 3.0/TLS 1.0 format */
491 * do the record header (5 bytes) and handshake message header (4
496 *(p
++) = version_major
;
497 *(p
++) = version_minor
;
500 memcpy(p
, s
->s3
->client_random
, SSL3_RANDOM_SIZE
);
501 p
+= SSL3_RANDOM_SIZE
;
503 /* Session ID (zero since there is no reuse) */
506 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
507 i
= ssl_cipher_list_to_bytes(s
, SSL_get_ciphers(s
), &(p
[2]),
508 ssl3_put_cipher_by_char
);
510 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_NO_CIPHERS_AVAILABLE
);
513 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
515 * Some servers hang if client hello > 256 bytes as hack
516 * workaround chop number of supported ciphers to keep it well
517 * below this if we use TLS v1.2
519 if (TLS1_get_version(s
) >= TLS1_2_VERSION
520 && i
> OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
)
521 i
= OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
& ~1;
527 #ifdef OPENSSL_NO_COMP
530 if ((s
->options
& SSL_OP_NO_COMPRESSION
)
531 || !s
->ctx
->comp_methods
)
534 j
= sk_SSL_COMP_num(s
->ctx
->comp_methods
);
536 for (i
= 0; i
< j
; i
++) {
537 comp
= sk_SSL_COMP_value(s
->ctx
->comp_methods
, i
);
541 *(p
++) = 0; /* Add the NULL method */
543 #ifndef OPENSSL_NO_TLSEXT
545 if (ssl_prepare_clienthello_tlsext(s
) <= 0) {
546 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, SSL_R_CLIENTHELLO_TLSEXT
);
550 ssl_add_clienthello_tlsext(s
, p
,
551 buf
+ SSL3_RT_MAX_PLAIN_LENGTH
,
553 ssl3_send_alert(s
, SSL3_AL_FATAL
, al
);
554 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
561 /* fill in 4-byte handshake header */
563 *(d
++) = SSL3_MT_CLIENT_HELLO
;
568 if (l
> SSL3_RT_MAX_PLAIN_LENGTH
) {
569 SSLerr(SSL_F_SSL23_CLIENT_HELLO
, ERR_R_INTERNAL_ERROR
);
573 /* fill in 5-byte record header */
575 *(d
++) = SSL3_RT_HANDSHAKE
;
576 *(d
++) = version_major
;
578 * Some servers hang if we use long client hellos and a record
581 if (TLS1_get_client_version(s
) > TLS1_VERSION
)
584 *(d
++) = version_minor
;
587 /* number of bytes to write */
588 s
->init_num
= p
- buf
;
591 ssl3_finish_mac(s
, &(buf
[5]), s
->init_num
- 5);
594 s
->state
= SSL23_ST_CW_CLNT_HELLO_B
;
598 /* SSL3_ST_CW_CLNT_HELLO_B */
599 ret
= ssl23_write_bytes(s
);
601 if ((ret
>= 2) && s
->msg_callback
) {
602 /* Client Hello has been sent; tell msg_callback */
605 s
->msg_callback(1, SSL2_VERSION
, 0, s
->init_buf
->data
+ 2,
606 ret
- 2, s
, s
->msg_callback_arg
);
608 s
->msg_callback(1, version
, SSL3_RT_HEADER
, s
->init_buf
->data
, 5,
609 s
, s
->msg_callback_arg
);
610 s
->msg_callback(1, version
, SSL3_RT_HANDSHAKE
,
611 s
->init_buf
->data
+ 5, ret
- 5, s
,
612 s
->msg_callback_arg
);
619 static int ssl23_get_server_hello(SSL
*s
)
626 n
= ssl23_read_bytes(s
, 7);
634 if ((p
[0] & 0x80) && (p
[2] == SSL2_MT_SERVER_HELLO
) &&
635 (p
[5] == 0x00) && (p
[6] == 0x02)) {
636 #ifdef OPENSSL_NO_SSL2
637 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
640 /* we are talking sslv2 */
642 * we need to clean up the SSLv3 setup and put in the sslv2 stuff.
646 if (s
->options
& SSL_OP_NO_SSLv2
) {
647 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
656 if (s
->options
& SSL_OP_NETSCAPE_CHALLENGE_BUG
)
657 ch_len
= SSL2_CHALLENGE_LENGTH
;
659 ch_len
= SSL2_MAX_CHALLENGE_LENGTH
;
661 /* write out sslv2 challenge */
663 * Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because it is
664 * one of SSL2_MAX_CHALLENGE_LENGTH (32) or SSL2_MAX_CHALLENGE_LENGTH
665 * (16), but leave the check in for futurproofing
667 i
= (SSL3_RANDOM_SIZE
< ch_len
)
668 ? SSL3_RANDOM_SIZE
: ch_len
;
669 s
->s2
->challenge_length
= i
;
670 memcpy(s
->s2
->challenge
,
671 &(s
->s3
->client_random
[SSL3_RANDOM_SIZE
- i
]), i
);
676 if (!BUF_MEM_grow_clean(s
->init_buf
,
677 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER
)) {
678 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, ERR_R_BUF_LIB
);
682 s
->state
= SSL2_ST_GET_SERVER_HELLO_A
;
683 if (!(s
->client_version
== SSL2_VERSION
))
685 * use special padding (SSL 3.0 draft/RFC 2246, App. E.2)
687 s
->s2
->ssl2_rollback
= 1;
690 * setup the 7 bytes we have read so we get them from the sslv2
693 s
->rstate
= SSL_ST_READ_HEADER
;
694 s
->packet_length
= n
;
695 s
->packet
= &(s
->s2
->rbuf
[0]);
696 memcpy(s
->packet
, buf
, n
);
697 s
->s2
->rbuf_left
= n
;
698 s
->s2
->rbuf_offs
= 0;
700 /* we have already written one */
701 s
->s2
->write_sequence
= 1;
703 s
->method
= SSLv2_client_method();
704 s
->handshake_func
= s
->method
->ssl_connect
;
706 } else if (p
[1] == SSL3_VERSION_MAJOR
&&
707 p
[2] <= TLS1_2_VERSION_MINOR
&&
708 ((p
[0] == SSL3_RT_HANDSHAKE
&& p
[5] == SSL3_MT_SERVER_HELLO
) ||
709 (p
[0] == SSL3_RT_ALERT
&& p
[3] == 0 && p
[4] == 2))) {
710 /* we have sslv3 or tls1 (server hello or alert) */
712 #ifndef OPENSSL_NO_SSL3
713 if ((p
[2] == SSL3_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_SSLv3
)) {
716 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
,
717 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE
);
721 s
->version
= SSL3_VERSION
;
722 s
->method
= SSLv3_client_method();
725 if ((p
[2] == TLS1_VERSION_MINOR
) && !(s
->options
& SSL_OP_NO_TLSv1
)) {
726 s
->version
= TLS1_VERSION
;
727 s
->method
= TLSv1_client_method();
728 } else if ((p
[2] == TLS1_1_VERSION_MINOR
) &&
729 !(s
->options
& SSL_OP_NO_TLSv1_1
)) {
730 s
->version
= TLS1_1_VERSION
;
731 s
->method
= TLSv1_1_client_method();
732 } else if ((p
[2] == TLS1_2_VERSION_MINOR
) &&
733 !(s
->options
& SSL_OP_NO_TLSv1_2
)) {
734 s
->version
= TLS1_2_VERSION
;
735 s
->method
= TLSv1_2_client_method();
737 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNSUPPORTED_PROTOCOL
);
741 /* ensure that TLS_MAX_VERSION is up-to-date */
742 OPENSSL_assert(s
->version
<= TLS_MAX_VERSION
);
744 if (p
[0] == SSL3_RT_ALERT
&& p
[5] != SSL3_AL_WARNING
) {
747 void (*cb
) (const SSL
*ssl
, int type
, int val
) = NULL
;
750 if (s
->info_callback
!= NULL
)
751 cb
= s
->info_callback
;
752 else if (s
->ctx
->info_callback
!= NULL
)
753 cb
= s
->ctx
->info_callback
;
758 cb(s
, SSL_CB_READ_ALERT
, j
);
761 if (s
->msg_callback
) {
762 s
->msg_callback(0, s
->version
, SSL3_RT_HEADER
, p
, 5, s
,
763 s
->msg_callback_arg
);
764 s
->msg_callback(0, s
->version
, SSL3_RT_ALERT
, p
+ 5, 2, s
,
765 s
->msg_callback_arg
);
768 s
->rwstate
= SSL_NOTHING
;
769 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_AD_REASON_OFFSET
+ p
[6]);
773 if (!ssl_init_wbio_buffer(s
, 1))
776 /* we are in this state */
777 s
->state
= SSL3_ST_CR_SRVR_HELLO_A
;
780 * put the 7 bytes we have read into the input buffer for SSLv3
782 s
->rstate
= SSL_ST_READ_HEADER
;
783 s
->packet_length
= n
;
784 if (s
->s3
->rbuf
.buf
== NULL
)
785 if (!ssl3_setup_read_buffer(s
))
787 s
->packet
= &(s
->s3
->rbuf
.buf
[0]);
788 memcpy(s
->packet
, buf
, n
);
789 s
->s3
->rbuf
.left
= n
;
790 s
->s3
->rbuf
.offset
= 0;
792 s
->handshake_func
= s
->method
->ssl_connect
;
794 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO
, SSL_R_UNKNOWN_PROTOCOL
);
800 * Since, if we are sending a ssl23 client hello, we are not reusing a
803 if (!ssl_get_new_session(s
, 0))
806 return (SSL_connect(s
));