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 if (ver == SSL3_VERSION)
129 return(SSLv3_client_method());
130 else if (ver == TLS1_VERSION)
131 return(TLSv1_client_method());
132 else if (ver == TLS1_1_VERSION)
133 return(TLSv1_1_client_method());
134 else if (ver == TLS1_2_VERSION)
135 return(TLSv1_2_client_method());
140 IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
141 ssl_undefined_function,
143 ssl23_get_client_method)
145 int ssl23_connect(SSL *s)
148 unsigned long Time=(unsigned long)time(NULL);
149 void (*cb)(const SSL *ssl,int type,int val)=NULL;
153 RAND_add(&Time,sizeof(Time),0);
157 if (s->info_callback != NULL)
159 else if (s->ctx->info_callback != NULL)
160 cb=s->ctx->info_callback;
163 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
173 case SSL_ST_BEFORE|SSL_ST_CONNECT:
174 case SSL_ST_OK|SSL_ST_CONNECT:
176 if (s->session != NULL)
178 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
183 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
185 /* s->version=TLS1_VERSION; */
186 s->type=SSL_ST_CONNECT;
188 if (s->init_buf == NULL)
190 if ((buf=BUF_MEM_new()) == NULL)
195 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
204 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
206 ssl3_init_finished_mac(s);
208 s->state=SSL23_ST_CW_CLNT_HELLO_A;
209 s->ctx->stats.sess_connect++;
213 case SSL23_ST_CW_CLNT_HELLO_A:
214 case SSL23_ST_CW_CLNT_HELLO_B:
217 ret=ssl23_client_hello(s);
218 if (ret <= 0) goto end;
219 s->state=SSL23_ST_CR_SRVR_HELLO_A;
224 case SSL23_ST_CR_SRVR_HELLO_A:
225 case SSL23_ST_CR_SRVR_HELLO_B:
226 ret=ssl23_get_server_hello(s);
227 if (ret >= 0) cb=NULL;
232 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
238 if (s->debug) { (void)BIO_flush(s->wbio); }
240 if ((cb != NULL) && (s->state != state))
244 cb(s,SSL_CB_CONNECT_LOOP,1);
253 cb(s,SSL_CB_CONNECT_EXIT,ret);
257 static int ssl23_no_ssl2_ciphers(SSL *s)
260 STACK_OF(SSL_CIPHER) *ciphers;
262 ssl_set_client_disabled(s);
263 ciphers = SSL_get_ciphers(s);
264 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
266 cipher = sk_SSL_CIPHER_value(ciphers, i);
267 if (ssl_cipher_disabled(s, cipher, SSL_SECOP_CIPHER_SUPPORTED))
269 if (cipher->algorithm_ssl == SSL_SSLV2)
275 /* Fill a ClientRandom or ServerRandom field of length len. Returns <= 0
276 * on failure, 1 on success. */
277 int ssl_fill_hello_random(SSL *s, int server, unsigned char *result, int len)
283 send_time = (s->mode & SSL_MODE_SEND_SERVERHELLO_TIME) != 0;
285 send_time = (s->mode & SSL_MODE_SEND_CLIENTHELLO_TIME) != 0;
288 unsigned long Time = (unsigned long)time(NULL);
289 unsigned char *p = result;
291 return RAND_pseudo_bytes(p, len-4);
294 return RAND_pseudo_bytes(result, len);
297 static int ssl23_client_hello(SSL *s)
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 && !ssl_security(s, SSL_SECOP_SSL2_COMPAT, 0, 0, NULL))
317 if (ssl2_compat && ssl23_no_ssl2_ciphers(s))
321 * SSL_OP_NO_X disables all protocols above X *if* there are
322 * some protocols below X enabled. This is required in order
323 * to maintain "version capability" vector contiguous. So
324 * that if application wants to disable TLS1.0 in favour of
325 * TLS1>=1, it would be insufficient to pass SSL_NO_TLSv1, the
326 * answer is SSL_OP_NO_TLSv1|SSL_OP_NO_SSLv3|SSL_OP_NO_SSLv2.
328 mask = SSL_OP_NO_TLSv1_1|SSL_OP_NO_TLSv1
329 #if !defined(OPENSSL_NO_SSL3)
332 #if !defined(OPENSSL_NO_SSL2)
333 |(ssl2_compat?SSL_OP_NO_SSLv2:0)
336 #if !defined(OPENSSL_NO_TLS1_2_CLIENT)
337 version = TLS1_2_VERSION;
339 if ((options & SSL_OP_NO_TLSv1_2) && (options & mask) != mask)
340 version = TLS1_1_VERSION;
342 version = TLS1_1_VERSION;
344 mask &= ~SSL_OP_NO_TLSv1_1;
345 if ((options & SSL_OP_NO_TLSv1_1) && (options & mask) != mask)
346 version = TLS1_VERSION;
347 mask &= ~SSL_OP_NO_TLSv1;
348 #if !defined(OPENSSL_NO_SSL3)
349 if ((options & SSL_OP_NO_TLSv1) && (options & mask) != mask)
350 version = SSL3_VERSION;
351 mask &= ~SSL_OP_NO_SSLv3;
353 #if !defined(OPENSSL_NO_SSL2)
354 if ((options & SSL_OP_NO_SSLv3) && (options & mask) != mask)
355 version = SSL2_VERSION;
358 #ifndef OPENSSL_NO_TLSEXT
359 if (version != SSL2_VERSION)
361 /* have to disable SSL 2.0 compatibility if we need TLS extensions */
363 if (s->tlsext_hostname != NULL)
365 if (s->tlsext_status_type != -1)
367 #ifdef TLSEXT_TYPE_opaque_prf_input
368 if (s->ctx->tlsext_opaque_prf_input_callback != 0 || 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)
380 /* don't reuse session-id's */
381 if (!ssl_get_new_session(s,0))
387 p=s->s3->client_random;
388 if (ssl_fill_hello_random(s, 0, p, SSL3_RANDOM_SIZE) <= 0)
391 if (version == TLS1_2_VERSION)
393 version_major = TLS1_2_VERSION_MAJOR;
394 version_minor = TLS1_2_VERSION_MINOR;
396 else if (tls1_suiteb(s))
398 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
399 SSL_R_ONLY_TLS_1_2_ALLOWED_IN_SUITEB_MODE);
402 else if (version == TLS1_1_VERSION)
404 version_major = TLS1_1_VERSION_MAJOR;
405 version_minor = TLS1_1_VERSION_MINOR;
407 else if (version == TLS1_VERSION)
409 version_major = TLS1_VERSION_MAJOR;
410 version_minor = TLS1_VERSION_MINOR;
415 SSLerr(SSL_F_SSL23_CLIENT_HELLO,
416 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
420 else if (version == SSL3_VERSION)
422 version_major = SSL3_VERSION_MAJOR;
423 version_minor = SSL3_VERSION_MINOR;
425 else if (version == SSL2_VERSION)
427 version_major = SSL2_VERSION_MAJOR;
428 version_minor = SSL2_VERSION_MINOR;
432 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
436 s->client_version = version;
440 /* create SSL 2.0 compatible Client Hello */
442 /* two byte record header will be written last */
444 p = d + 9; /* leave space for message type, version, individual length fields */
446 *(d++) = SSL2_MT_CLIENT_HELLO;
447 *(d++) = version_major;
448 *(d++) = version_minor;
450 /* Ciphers supported */
451 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
455 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
461 /* put in the session-id length (zero since there is no reuse) */
463 s->session->session_id_length=0;
467 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
468 ch_len=SSL2_CHALLENGE_LENGTH;
470 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
472 /* write out sslv2 challenge */
473 /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32),
474 because it is one of SSL2_MAX_CHALLENGE_LENGTH (32)
475 or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the
476 check in for futurproofing */
477 if (SSL3_RANDOM_SIZE < ch_len)
482 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
483 if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
486 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
490 buf[0]=((i>>8)&0xff)|0x80;
493 /* number of bytes to write */
497 ssl3_finish_mac(s,&(buf[2]),i);
501 /* create Client Hello in SSL 3.0/TLS 1.0 format */
503 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
506 *(p++) = version_major;
507 *(p++) = version_minor;
510 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
511 p += SSL3_RANDOM_SIZE;
513 /* Session ID (zero since there is no reuse) */
516 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
517 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
520 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
523 #ifdef OPENSSL_MAX_TLS1_2_CIPHER_LENGTH
524 /* Some servers hang if client hello > 256 bytes
525 * as hack workaround chop number of supported ciphers
526 * to keep it well below this if we use TLS v1.2
528 if (TLS1_get_version(s) >= TLS1_2_VERSION
529 && i > OPENSSL_MAX_TLS1_2_CIPHER_LENGTH)
530 i = OPENSSL_MAX_TLS1_2_CIPHER_LENGTH & ~1;
536 #ifdef OPENSSL_NO_COMP
539 if (!ssl_allow_compression(s) || !s->ctx->comp_methods)
542 j=sk_SSL_COMP_num(s->ctx->comp_methods);
546 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
550 *(p++)=0; /* Add the NULL method */
552 #ifndef OPENSSL_NO_TLSEXT
554 if (ssl_prepare_clienthello_tlsext(s) <= 0)
556 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
559 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH, &al)) == NULL)
561 ssl3_send_alert(s,SSL3_AL_FATAL,al);
562 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
569 /* fill in 4-byte handshake header */
571 *(d++)=SSL3_MT_CLIENT_HELLO;
576 if (l > SSL3_RT_MAX_PLAIN_LENGTH)
578 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
582 /* fill in 5-byte record header */
584 *(d++) = SSL3_RT_HANDSHAKE;
585 *(d++) = version_major;
586 /* Some servers hang if we use long client hellos
587 * and a record number > TLS 1.0.
589 if (TLS1_get_client_version(s) > TLS1_VERSION)
592 *(d++) = version_minor;
595 /* number of bytes to write */
599 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
602 s->state=SSL23_ST_CW_CLNT_HELLO_B;
606 /* SSL3_ST_CW_CLNT_HELLO_B */
607 ret = ssl23_write_bytes(s);
609 if ((ret >= 2) && s->msg_callback)
611 /* Client Hello has been sent; tell msg_callback */
614 s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
617 s->msg_callback(1, version, SSL3_RT_HEADER, s->init_buf->data, 5, s, s->msg_callback_arg);
618 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
625 static int ssl23_get_server_hello(SSL *s)
632 n=ssl23_read_bytes(s,7);
634 if (n != 7) return(n);
639 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
640 (p[5] == 0x00) && (p[6] == 0x02))
642 #ifdef OPENSSL_NO_SSL2
643 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
646 /* we are talking sslv2 */
647 /* we need to clean up the SSLv3 setup and put in the
651 if (s->options & SSL_OP_NO_SSLv2)
653 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
664 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
665 ch_len=SSL2_CHALLENGE_LENGTH;
667 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
669 /* write out sslv2 challenge */
670 /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because
671 it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or
672 SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for
674 i=(SSL3_RANDOM_SIZE < ch_len)
675 ?SSL3_RANDOM_SIZE:ch_len;
676 s->s2->challenge_length=i;
677 memcpy(s->s2->challenge,
678 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
680 if (s->s3 != NULL) ssl3_free(s);
682 if (!BUF_MEM_grow_clean(s->init_buf,
683 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
685 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
689 s->state=SSL2_ST_GET_SERVER_HELLO_A;
690 if (!(s->client_version == SSL2_VERSION))
691 /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
692 s->s2->ssl2_rollback=1;
694 /* setup the 7 bytes we have read so we get them from
695 * the sslv2 buffer */
696 s->rstate=SSL_ST_READ_HEADER;
698 s->packet= &(s->s2->rbuf[0]);
699 memcpy(s->packet,buf,n);
703 /* we have already written one */
704 s->s2->write_sequence=1;
706 s->method=SSLv2_client_method();
707 s->handshake_func=s->method->ssl_connect;
710 else if (p[1] == SSL3_VERSION_MAJOR &&
711 p[2] <= TLS1_2_VERSION_MINOR &&
712 ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
713 (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2)))
715 /* we have sslv3 or tls1 (server hello or alert) */
717 if ((p[2] == SSL3_VERSION_MINOR) &&
718 !(s->options & SSL_OP_NO_SSLv3))
723 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,
724 SSL_R_ONLY_TLS_ALLOWED_IN_FIPS_MODE);
728 s->version=SSL3_VERSION;
729 s->method=SSLv3_client_method();
731 else if ((p[2] == TLS1_VERSION_MINOR) &&
732 !(s->options & SSL_OP_NO_TLSv1))
734 s->version=TLS1_VERSION;
735 s->method=TLSv1_client_method();
737 else if ((p[2] == TLS1_1_VERSION_MINOR) &&
738 !(s->options & SSL_OP_NO_TLSv1_1))
740 s->version=TLS1_1_VERSION;
741 s->method=TLSv1_1_client_method();
743 else if ((p[2] == TLS1_2_VERSION_MINOR) &&
744 !(s->options & SSL_OP_NO_TLSv1_2))
746 s->version=TLS1_2_VERSION;
747 s->method=TLSv1_2_client_method();
751 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
755 /* ensure that TLS_MAX_VERSION is up-to-date */
756 OPENSSL_assert(s->version <= TLS_MAX_VERSION);
758 if (!ssl_security(s, SSL_SECOP_VERSION, 0, s->version, NULL))
760 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_VERSION_TOO_LOW);
764 if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
768 void (*cb)(const SSL *ssl,int type,int val)=NULL;
771 if (s->info_callback != NULL)
773 else if (s->ctx->info_callback != NULL)
774 cb=s->ctx->info_callback;
780 cb(s,SSL_CB_READ_ALERT,j);
785 s->msg_callback(0, s->version, SSL3_RT_HEADER, p, 5, s, s->msg_callback_arg);
786 s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg);
789 s->rwstate=SSL_NOTHING;
790 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
794 if (!ssl_init_wbio_buffer(s,1)) goto err;
796 /* we are in this state */
797 s->state=SSL3_ST_CR_SRVR_HELLO_A;
799 /* put the 7 bytes we have read into the input buffer
801 s->rstate=SSL_ST_READ_HEADER;
803 if (s->s3->rbuf.buf == NULL)
804 if (!ssl3_setup_read_buffer(s))
806 s->packet= &(s->s3->rbuf.buf[0]);
807 memcpy(s->packet,buf,n);
809 s->s3->rbuf.offset=0;
811 s->handshake_func=s->method->ssl_connect;
815 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
820 /* Since, if we are sending a ssl23 client hello, we are not
821 * reusing a session-id */
822 if (!ssl_get_new_session(s,0))
825 return(SSL_connect(s));