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,
145 ssl23_get_client_method)
147 int ssl23_connect(SSL *s)
150 unsigned long Time=(unsigned long)time(NULL);
151 void (*cb)(const SSL *ssl,int type,int val)=NULL;
155 RAND_add(&Time,sizeof(Time),0);
159 if (s->info_callback != NULL)
161 else if (s->ctx->info_callback != NULL)
162 cb=s->ctx->info_callback;
165 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
175 case SSL_ST_BEFORE|SSL_ST_CONNECT:
176 case SSL_ST_OK|SSL_ST_CONNECT:
178 if (s->session != NULL)
180 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
185 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
187 /* s->version=TLS1_VERSION; */
188 s->type=SSL_ST_CONNECT;
190 if (s->init_buf == NULL)
192 if ((buf=BUF_MEM_new()) == NULL)
197 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
206 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
208 ssl3_init_finished_mac(s);
210 s->state=SSL23_ST_CW_CLNT_HELLO_A;
211 s->ctx->stats.sess_connect++;
215 case SSL23_ST_CW_CLNT_HELLO_A:
216 case SSL23_ST_CW_CLNT_HELLO_B:
219 ret=ssl23_client_hello(s);
220 if (ret <= 0) goto end;
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);
229 if (ret >= 0) cb=NULL;
234 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
240 if (s->debug) { (void)BIO_flush(s->wbio); }
242 if ((cb != NULL) && (s->state != state))
246 cb(s,SSL_CB_CONNECT_LOOP,1);
255 cb(s,SSL_CB_CONNECT_EXIT,ret);
259 static int ssl23_no_ssl2_ciphers(SSL *s)
262 STACK_OF(SSL_CIPHER) *ciphers;
264 ssl_set_client_disabled(s);
265 ciphers = SSL_get_ciphers(s);
266 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
268 cipher = sk_SSL_CIPHER_value(ciphers, i);
269 if (ssl_cipher_disabled(s, cipher, SSL_SECOP_CIPHER_SUPPORTED))
271 if (cipher->algorithm_ssl == SSL_SSLV2)
277 /* Fill a ClientRandom or ServerRandom field of length len. Returns <= 0
278 * on 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;
290 unsigned long Time = (unsigned long)time(NULL);
291 unsigned char *p = result;
293 return RAND_pseudo_bytes(p, len-4);
296 return RAND_pseudo_bytes(result, len);
299 static int ssl23_client_hello(SSL *s)
306 int version = 0, version_major, version_minor;
308 #ifndef OPENSSL_NO_COMP
313 unsigned long mask, options = s->options;
315 ssl2_compat = (options & SSL_OP_NO_SSLv2) ? 0 : 1;
317 if (ssl2_compat && !ssl_security(s, SSL_SECOP_SSL2_COMPAT, 0, 0, NULL))
319 if (ssl2_compat && ssl23_no_ssl2_ciphers(s))
323 * SSL_OP_NO_X disables all protocols above X *if* there are
324 * some protocols below X enabled. This is required in order
325 * to maintain "version capability" vector contiguous. So
326 * that if application wants to disable TLS1.0 in favour of
327 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
328 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
330 mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1
331 #if !defined(OPENSSL_NO_SSL3)
334 #if !defined(OPENSSL_NO_SSL2)
335 |(ssl2_compat?SSL_OP_NO_SSLv2:0)
338 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
339 version = TLS1_2_VERSION;
341 if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
342 version = TLS1_1_VERSION;
344 version = TLS1_1_VERSION;
346 mask &= ~SSL_OP_NO_TLSv1_1;
347 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
348 version = TLS1_VERSION;
349 mask &= ~SSL_OP_NO_TLSv1;
350 #if !defined(OPENSSL_NO_SSL3)
351 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
352 version = SSL3_VERSION;
353 mask &= ~SSL_OP_NO_SSLv3;
355 #if !defined(OPENSSL_NO_SSL2)
356 if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask)
357 version = SSL2_VERSION;
360 #ifndef OPENSSL_NO_TLSEXT
361 if (version != SSL2_VERSION)
363 /* have to disable SSL 2.0 compatibility if we need TLS extensions */
365 if (s->tlsext_hostname != NULL)
367 if (s->tlsext_status_type != -1)
369 #ifdef TLSEXT_TYPE_opaque_prf_input
370 if (s->ctx->tlsext_opaque_prf_input_callback != 0 || s->tlsext_opaque_prf_input != NULL)
373 if (s->cert->cli_ext.meths_count != 0)
378 buf=(unsigned char *)s->init_buf->data;
379 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
382 /* don't reuse session-id's */
383 if (!ssl_get_new_session(s,0))
389 p=s->s3->client_random;
390 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
393 if (version == TLS1_2_VERSION)
395 version_major = TLS1_2_VERSION_MAJOR;
396 version_minor = TLS1_2_VERSION_MINOR;
398 else if (tls1_suiteb(s))
400 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
401 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
404 else if (version == TLS1_1_VERSION)
406 version_major = TLS1_1_VERSION_MAJOR;
407 version_minor = TLS1_1_VERSION_MINOR;
409 else if (version == TLS1_VERSION)
411 version_major = TLS1_VERSION_MAJOR;
412 version_minor = TLS1_VERSION_MINOR;
417 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
418 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
422 else if (version == SSL3_VERSION)
424 version_major = SSL3_VERSION_MAJOR;
425 version_minor = SSL3_VERSION_MINOR;
427 else if (version == SSL2_VERSION)
429 version_major = SSL2_VERSION_MAJOR;
430 version_minor = SSL2_VERSION_MINOR;
434 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
438 s->client_version = version;
442 /* create SSL 2.0 compatible Client Hello */
444 /* two byte record header will be written last */
446 p = d + 9; /* leave space for message type, version, individual length fields */
448 *(d++) = SSL2_MT_CLIENT_HELLO;
449 *(d++) = version_major;
450 *(d++) = version_minor;
452 /* Ciphers supported */
453 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
457 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
463 /* put in the session-id length (zero since there is no reuse) */
465 s->session->session_id_length=0;
469 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
470 ch_len=SSL2_CHALLENGE_LENGTH;
472 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
474 /* write out sslv2 challenge */
475 /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32),
476 because it is one of SSL2_MAX_CHALLENGE_LENGTH (32)
477 or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the
478 check in for futurproofing */
479 if (SSL3_RANDOM_SIZE < ch_len)
484 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
485 if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
488 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
492 buf[0]=((i>>8)&0xff)|0x80;
495 /* number of bytes to write */
499 ssl3_finish_mac(s,&(buf[2]),i);
503 /* create Client Hello in SSL 3.0/TLS 1.0 format */
505 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
508 *(p++) = version_major;
509 *(p++) = version_minor;
512 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
513 p += SSL3_RANDOM_SIZE;
515 /* Session ID (zero since there is no reuse) */
518 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
519 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
522 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
525 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
526 /* Some servers hang if client hello > 256 bytes
527 * as hack workaround chop number of supported ciphers
528 * to keep it well below this if we use TLS v1.2
530 if (TLS1_get_version(s) >= TLS1_2_VERSION
531 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
532 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
538 #ifdef OPENSSL_NO_COMP
541 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
544 j=sk_SSL_COMP_num(s->ctx->comp_methods);
548 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
552 *(p++)=0; /* Add the NULL method */
554 #ifndef OPENSSL_NO_TLSEXT
556 if (ssl_prepare_clienthello_tlsext(s) <= 0)
558 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
561 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
563 ssl3_send_alert(s,SSL3_AL_FATAL,al);
564 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
571 /* fill in 4-byte handshake header */
573 *(d++)=SSL3_MT_CLIENT_HELLO;
578 if (l > SSL3_RT_MAX_PLAIN_LENGTH)
580 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
584 /* fill in 5-byte record header */
586 *(d++) = SSL3_RT_HANDSHAKE;
587 *(d++) = version_major;
588 /* Some servers hang if we use long client hellos
589 * and a record number > TLS 1.0.
591 if (TLS1_get_client_version(s) > TLS1_VERSION)
594 *(d++) = version_minor;
597 /* number of bytes to write */
601 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
604 s->state=SSL23_ST_CW_CLNT_HELLO_B;
608 /* SSL3_ST_CW_CLNT_HELLO_B */
609 ret = ssl23_write_bytes(s);
611 if ((ret >= 2) && s->msg_callback)
613 /* Client Hello has been sent; tell msg_callback */
616 s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
619 s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, s, s->msg_callback_arg);
620 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
627 static int ssl23_get_server_hello(SSL *s)
634 n=ssl23_read_bytes(s,7);
636 if (n != 7) return(n);
641 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
642 (p[5] == 0x00) && (p[6] == 0x02))
644 #ifdef OPENSSL_NO_SSL2
645 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
648 /* we are talking sslv2 */
649 /* we need to clean up the SSLv3 setup and put in the
653 if (s->options & SSL_OP_NO_SSLv2)
655 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
666 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
667 ch_len=SSL2_CHALLENGE_LENGTH;
669 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
671 /* write out sslv2 challenge */
672 /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because
673 it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or
674 SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for
676 i=(SSL3_RANDOM_SIZE < ch_len)
677 ?SSL3_RANDOM_SIZE:ch_len;
678 s->s2->challenge_length=i;
679 memcpy(s->s2->challenge,
680 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
682 if (s->s3 != NULL) ssl3_free(s);
684 if (!BUF_MEM_grow_clean(s->init_buf,
685 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
687 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
691 s->state=SSL2_ST_GET_SERVER_HELLO_A;
692 if (!(s->client_version == SSL2_VERSION))
693 /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
694 s->s2->ssl2_rollback=1;
696 /* setup the 7 bytes we have read so we get them from
697 * the sslv2 buffer */
698 s->rstate=SSL_ST_READ_HEADER;
700 s->packet= &(s->s2->rbuf[0]);
701 memcpy(s->packet,buf,n);
705 /* we have already written one */
706 s->s2->write_sequence=1;
708 s->method=SSLv2_client_method();
709 s->handshake_func=s->method->ssl_connect;
712 else if (p[1] == SSL3_VERSION_MAJOR &&
713 p[2] <= TLS1_2_VERSION_MINOR &&
714 ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
715 (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2)))
717 /* we have sslv3 or tls1 (server hello or alert) */
719 #ifndef OPENSSL_NO_SSL3
720 if ((p[2] == SSL3_VERSION_MINOR) &&
721 !(s->options & SSL_OP_NO_SSLv3))
726 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
727 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
731 s->version=SSL3_VERSION;
732 s->method=SSLv3_client_method();
736 if ((p[2] == TLS1_VERSION_MINOR) &&
737 !(s->options & SSL_OP_NO_TLSv1))
739 s->version=TLS1_VERSION;
740 s->method=TLSv1_client_method();
742 else if ((p[2] == TLS1_1_VERSION_MINOR) &&
743 !(s->options & SSL_OP_NO_TLSv1_1))
745 s->version=TLS1_1_VERSION;
746 s->method=TLSv1_1_client_method();
748 else if ((p[2] == TLS1_2_VERSION_MINOR) &&
749 !(s->options & SSL_OP_NO_TLSv1_2))
751 s->version=TLS1_2_VERSION;
752 s->method=TLSv1_2_client_method();
756 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
760 /* ensure that TLS_MAX_VERSION is up-to-date */
761 OPENSSL_assert(s->version <= TLS_MAX_VERSION);
763 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL))
765 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_VERSION_TOO_LOW);
769 if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
773 void (*cb)(const SSL *ssl,int type,int val)=NULL;
776 if (s->info_callback != NULL)
778 else if (s->ctx->info_callback != NULL)
779 cb=s->ctx->info_callback;
785 cb(s,SSL_CB_READ_ALERT,j);
790 s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s, s->msg_callback_arg);
791 s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg);
794 s->rwstate=SSL_NOTHING;
795 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
799 if (!ssl_init_wbio_buffer(s,1)) goto err;
801 /* we are in this state */
802 s->state=SSL3_ST_CR_SRVR_HELLO_A;
804 /* put the 7 bytes we have read into the input buffer
806 s->rstate=SSL_ST_READ_HEADER;
808 if (s->s3->rbuf.buf == NULL)
809 if (!ssl3_setup_read_buffer(s))
811 s->packet= &(s->s3->rbuf.buf[0]);
812 memcpy(s->packet,buf,n);
814 s->s3->rbuf.offset=0;
816 s->handshake_func=s->method->ssl_connect;
820 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
825 /* Since, if we are sending a ssl23 client hello, we are not
826 * reusing a session-id */
827 if (!ssl_get_new_session(s,0))
830 return(SSL_connect(s));