1 /* ssl/s23_clnt.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58 /* ====================================================================
59 * Copyright (c) 1998-2006 The OpenSSL Project. All rights reserved.
60 *
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
63 * are met:
64 *
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
67 *
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
71 * distribution.
72 *
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/)"
77 *
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.
82 *
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.
86 *
87 * 6. Redistributions of any form whatsoever must retain the following
88 * acknowledgment:
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
91 *
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 * ====================================================================
105 *
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).
109 *
110 */
111
112 #include <stdio.h>
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>
118
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);
ssl23_get_client_method(int ver)122 static const SSL_METHOD *ssl23_get_client_method(int ver)
123 {
124 #ifndef OPENSSL_NO_SSL2
125 if (ver == SSL2_VERSION)
126 return(SSLv2_client_method());
127 #endif
128 if (ver == SSL3_VERSION)
129 return(SSLv3_client_method());
130 else if (ver == TLS1_VERSION)
131 return(TLSv1_client_method());
132 else
133 return(NULL);
134 }
135
IMPLEMENT_ssl23_meth_func(SSLv23_client_method,ssl_undefined_function,ssl23_connect,ssl23_get_client_method)136 IMPLEMENT_ssl23_meth_func(SSLv23_client_method,
137 ssl_undefined_function,
138 ssl23_connect,
139 ssl23_get_client_method)
140
141 int ssl23_connect(SSL *s)
142 {
143 BUF_MEM *buf=NULL;
144 unsigned long Time=(unsigned long)time(NULL);
145 void (*cb)(const SSL *ssl,int type,int val)=NULL;
146 int ret= -1;
147 int new_state,state;
148
149 RAND_add(&Time,sizeof(Time),0);
150 ERR_clear_error();
151 clear_sys_error();
152
153 if (s->info_callback != NULL)
154 cb=s->info_callback;
155 else if (s->ctx->info_callback != NULL)
156 cb=s->ctx->info_callback;
157
158 s->in_handshake++;
159 if (!SSL_in_init(s) || SSL_in_before(s)) SSL_clear(s);
160
161 for (;;)
162 {
163 state=s->state;
164
165 switch(s->state)
166 {
167 case SSL_ST_BEFORE:
168 case SSL_ST_CONNECT:
169 case SSL_ST_BEFORE|SSL_ST_CONNECT:
170 case SSL_ST_OK|SSL_ST_CONNECT:
171
172 if (s->session != NULL)
173 {
174 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_SSL23_DOING_SESSION_ID_REUSE);
175 ret= -1;
176 goto end;
177 }
178 s->server=0;
179 if (cb != NULL) cb(s,SSL_CB_HANDSHAKE_START,1);
180
181 /* s->version=TLS1_VERSION; */
182 s->type=SSL_ST_CONNECT;
183
184 if (s->init_buf == NULL)
185 {
186 if ((buf=BUF_MEM_new()) == NULL)
187 {
188 ret= -1;
189 goto end;
190 }
191 if (!BUF_MEM_grow(buf,SSL3_RT_MAX_PLAIN_LENGTH))
192 {
193 ret= -1;
194 goto end;
195 }
196 s->init_buf=buf;
197 buf=NULL;
198 }
199
200 if (!ssl3_setup_buffers(s)) { ret= -1; goto end; }
201
202 ssl3_init_finished_mac(s);
203
204 s->state=SSL23_ST_CW_CLNT_HELLO_A;
205 s->ctx->stats.sess_connect++;
206 s->init_num=0;
207 break;
208
209 case SSL23_ST_CW_CLNT_HELLO_A:
210 case SSL23_ST_CW_CLNT_HELLO_B:
211
212 s->shutdown=0;
213 ret=ssl23_client_hello(s);
214 if (ret <= 0) goto end;
215 s->state=SSL23_ST_CR_SRVR_HELLO_A;
216 s->init_num=0;
217
218 break;
219
220 case SSL23_ST_CR_SRVR_HELLO_A:
221 case SSL23_ST_CR_SRVR_HELLO_B:
222 ret=ssl23_get_server_hello(s);
223 if (ret >= 0) cb=NULL;
224 goto end;
225 /* break; */
226
227 default:
228 SSLerr(SSL_F_SSL23_CONNECT,SSL_R_UNKNOWN_STATE);
229 ret= -1;
230 goto end;
231 /* break; */
232 }
233
234 if (s->debug) { (void)BIO_flush(s->wbio); }
235
236 if ((cb != NULL) && (s->state != state))
237 {
238 new_state=s->state;
239 s->state=state;
240 cb(s,SSL_CB_CONNECT_LOOP,1);
241 s->state=new_state;
242 }
243 }
244 end:
245 s->in_handshake--;
246 if (buf != NULL)
247 BUF_MEM_free(buf);
248 if (cb != NULL)
249 cb(s,SSL_CB_CONNECT_EXIT,ret);
250 return(ret);
251 }
252
ssl23_no_ssl2_ciphers(SSL * s)253 static int ssl23_no_ssl2_ciphers(SSL *s)
254 {
255 SSL_CIPHER *cipher;
256 STACK_OF(SSL_CIPHER) *ciphers;
257 int i;
258 ciphers = SSL_get_ciphers(s);
259 for (i = 0; i < sk_SSL_CIPHER_num(ciphers); i++)
260 {
261 cipher = sk_SSL_CIPHER_value(ciphers, i);
262 if (cipher->algorithm_ssl == SSL_SSLV2)
263 return 0;
264 }
265 return 1;
266 }
267
ssl23_client_hello(SSL * s)268 static int ssl23_client_hello(SSL *s)
269 {
270 unsigned char *buf;
271 unsigned char *p,*d;
272 int i,ch_len;
273 unsigned long Time,l;
274 int ssl2_compat;
275 int version = 0, version_major, version_minor;
276 #ifndef OPENSSL_NO_COMP
277 int j;
278 SSL_COMP *comp;
279 #endif
280 int ret;
281
282 ssl2_compat = (s->options & SSL_OP_NO_SSLv2) ? 0 : 1;
283
284 if (ssl2_compat && ssl23_no_ssl2_ciphers(s))
285 ssl2_compat = 0;
286
287 if (!(s->options & SSL_OP_NO_TLSv1))
288 {
289 version = TLS1_VERSION;
290 }
291 else if (!(s->options & SSL_OP_NO_SSLv3))
292 {
293 version = SSL3_VERSION;
294 }
295 else if (!(s->options & SSL_OP_NO_SSLv2))
296 {
297 version = SSL2_VERSION;
298 }
299 #ifndef OPENSSL_NO_TLSEXT
300 if (version != SSL2_VERSION)
301 {
302 /* have to disable SSL 2.0 compatibility if we need TLS extensions */
303
304 if (s->tlsext_hostname != NULL)
305 ssl2_compat = 0;
306 if (s->tlsext_status_type != -1)
307 ssl2_compat = 0;
308 #ifdef TLSEXT_TYPE_opaque_prf_input
309 if (s->ctx->tlsext_opaque_prf_input_callback != 0 || s->tlsext_opaque_prf_input != NULL)
310 ssl2_compat = 0;
311 #endif
312 }
313 #endif
314
315 buf=(unsigned char *)s->init_buf->data;
316 if (s->state == SSL23_ST_CW_CLNT_HELLO_A)
317 {
318 #if 0
319 /* don't reuse session-id's */
320 if (!ssl_get_new_session(s,0))
321 {
322 return(-1);
323 }
324 #endif
325
326 p=s->s3->client_random;
327 Time=(unsigned long)time(NULL); /* Time */
328 l2n(Time,p);
329 if (RAND_pseudo_bytes(p,SSL3_RANDOM_SIZE-4) <= 0)
330 return -1;
331
332 if (version == TLS1_VERSION)
333 {
334 version_major = TLS1_VERSION_MAJOR;
335 version_minor = TLS1_VERSION_MINOR;
336 }
337 else if (version == SSL3_VERSION)
338 {
339 version_major = SSL3_VERSION_MAJOR;
340 version_minor = SSL3_VERSION_MINOR;
341 }
342 else if (version == SSL2_VERSION)
343 {
344 version_major = SSL2_VERSION_MAJOR;
345 version_minor = SSL2_VERSION_MINOR;
346 }
347 else
348 {
349 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_PROTOCOLS_AVAILABLE);
350 return(-1);
351 }
352
353 s->client_version = version;
354
355 if (ssl2_compat)
356 {
357 /* create SSL 2.0 compatible Client Hello */
358
359 /* two byte record header will be written last */
360 d = &(buf[2]);
361 p = d + 9; /* leave space for message type, version, individual length fields */
362
363 *(d++) = SSL2_MT_CLIENT_HELLO;
364 *(d++) = version_major;
365 *(d++) = version_minor;
366
367 /* Ciphers supported */
368 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),p,0);
369 if (i == 0)
370 {
371 /* no ciphers */
372 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
373 return -1;
374 }
375 s2n(i,d);
376 p+=i;
377
378 /* put in the session-id length (zero since there is no reuse) */
379 #if 0
380 s->session->session_id_length=0;
381 #endif
382 s2n(0,d);
383
384 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
385 ch_len=SSL2_CHALLENGE_LENGTH;
386 else
387 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
388
389 /* write out sslv2 challenge */
390 /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32),
391 because it is one of SSL2_MAX_CHALLENGE_LENGTH (32)
392 or SSL2_MAX_CHALLENGE_LENGTH (16), but leave the
393 check in for futurproofing */
394 if (SSL3_RANDOM_SIZE < ch_len)
395 i=SSL3_RANDOM_SIZE;
396 else
397 i=ch_len;
398 s2n(i,d);
399 memset(&(s->s3->client_random[0]),0,SSL3_RANDOM_SIZE);
400 if (RAND_pseudo_bytes(&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i) <= 0)
401 return -1;
402
403 memcpy(p,&(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
404 p+=i;
405
406 i= p- &(buf[2]);
407 buf[0]=((i>>8)&0xff)|0x80;
408 buf[1]=(i&0xff);
409
410 /* number of bytes to write */
411 s->init_num=i+2;
412 s->init_off=0;
413
414 ssl3_finish_mac(s,&(buf[2]),i);
415 }
416 else
417 {
418 /* create Client Hello in SSL 3.0/TLS 1.0 format */
419
420 /* do the record header (5 bytes) and handshake message header (4 bytes) last */
421 d = p = &(buf[9]);
422
423 *(p++) = version_major;
424 *(p++) = version_minor;
425
426 /* Random stuff */
427 memcpy(p, s->s3->client_random, SSL3_RANDOM_SIZE);
428 p += SSL3_RANDOM_SIZE;
429
430 /* Session ID (zero since there is no reuse) */
431 *(p++) = 0;
432
433 /* Ciphers supported (using SSL 3.0/TLS 1.0 format) */
434 i=ssl_cipher_list_to_bytes(s,SSL_get_ciphers(s),&(p[2]),ssl3_put_cipher_by_char);
435 if (i == 0)
436 {
437 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_NO_CIPHERS_AVAILABLE);
438 return -1;
439 }
440 s2n(i,p);
441 p+=i;
442
443 /* COMPRESSION */
444 #ifdef OPENSSL_NO_COMP
445 *(p++)=1;
446 #else
447 if ((s->options & SSL_OP_NO_COMPRESSION)
448 || !s->ctx->comp_methods)
449 j=0;
450 else
451 j=sk_SSL_COMP_num(s->ctx->comp_methods);
452 *(p++)=1+j;
453 for (i=0; i<j; i++)
454 {
455 comp=sk_SSL_COMP_value(s->ctx->comp_methods,i);
456 *(p++)=comp->id;
457 }
458 #endif
459 *(p++)=0; /* Add the NULL method */
460
461 #ifndef OPENSSL_NO_TLSEXT
462 /* TLS extensions*/
463 if (ssl_prepare_clienthello_tlsext(s) <= 0)
464 {
465 SSLerr(SSL_F_SSL23_CLIENT_HELLO,SSL_R_CLIENTHELLO_TLSEXT);
466 return -1;
467 }
468 if ((p = ssl_add_clienthello_tlsext(s, p, buf+SSL3_RT_MAX_PLAIN_LENGTH)) == NULL)
469 {
470 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
471 return -1;
472 }
473 #endif
474
475 l = p-d;
476
477 /* fill in 4-byte handshake header */
478 d=&(buf[5]);
479 *(d++)=SSL3_MT_CLIENT_HELLO;
480 l2n3(l,d);
481
482 l += 4;
483
484 if (l > SSL3_RT_MAX_PLAIN_LENGTH)
485 {
486 SSLerr(SSL_F_SSL23_CLIENT_HELLO,ERR_R_INTERNAL_ERROR);
487 return -1;
488 }
489
490 /* fill in 5-byte record header */
491 d=buf;
492 *(d++) = SSL3_RT_HANDSHAKE;
493 *(d++) = version_major;
494 *(d++) = version_minor; /* arguably we should send the *lowest* suported version here
495 * (indicating, e.g., TLS 1.0 in "SSL 3.0 format") */
496 s2n((int)l,d);
497
498 /* number of bytes to write */
499 s->init_num=p-buf;
500 s->init_off=0;
501
502 ssl3_finish_mac(s,&(buf[5]), s->init_num - 5);
503 }
504
505 s->state=SSL23_ST_CW_CLNT_HELLO_B;
506 s->init_off=0;
507 }
508
509 /* SSL3_ST_CW_CLNT_HELLO_B */
510 ret = ssl23_write_bytes(s);
511
512 if ((ret >= 2) && s->msg_callback)
513 {
514 /* Client Hello has been sent; tell msg_callback */
515
516 if (ssl2_compat)
517 s->msg_callback(1, SSL2_VERSION, 0, s->init_buf->data+2, ret-2, s, s->msg_callback_arg);
518 else
519 s->msg_callback(1, version, SSL3_RT_HANDSHAKE, s->init_buf->data+5, ret-5, s, s->msg_callback_arg);
520 }
521
522 return ret;
523 }
524
ssl23_get_server_hello(SSL * s)525 static int ssl23_get_server_hello(SSL *s)
526 {
527 char buf[8];
528 unsigned char *p;
529 int i;
530 int n;
531
532 n=ssl23_read_bytes(s,7);
533
534 if (n != 7) return(n);
535 p=s->packet;
536
537 memcpy(buf,p,n);
538
539 if ((p[0] & 0x80) && (p[2] == SSL2_MT_SERVER_HELLO) &&
540 (p[5] == 0x00) && (p[6] == 0x02))
541 {
542 #ifdef OPENSSL_NO_SSL2
543 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
544 goto err;
545 #else
546 /* we are talking sslv2 */
547 /* we need to clean up the SSLv3 setup and put in the
548 * sslv2 stuff. */
549 int ch_len;
550
551 if (s->options & SSL_OP_NO_SSLv2)
552 {
553 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
554 goto err;
555 }
556 if (s->s2 == NULL)
557 {
558 if (!ssl2_new(s))
559 goto err;
560 }
561 else
562 ssl2_clear(s);
563
564 if (s->options & SSL_OP_NETSCAPE_CHALLENGE_BUG)
565 ch_len=SSL2_CHALLENGE_LENGTH;
566 else
567 ch_len=SSL2_MAX_CHALLENGE_LENGTH;
568
569 /* write out sslv2 challenge */
570 /* Note that ch_len must be <= SSL3_RANDOM_SIZE (32), because
571 it is one of SSL2_MAX_CHALLENGE_LENGTH (32) or
572 SSL2_MAX_CHALLENGE_LENGTH (16), but leave the check in for
573 futurproofing */
574 i=(SSL3_RANDOM_SIZE < ch_len)
575 ?SSL3_RANDOM_SIZE:ch_len;
576 s->s2->challenge_length=i;
577 memcpy(s->s2->challenge,
578 &(s->s3->client_random[SSL3_RANDOM_SIZE-i]),i);
579
580 if (s->s3 != NULL) ssl3_free(s);
581
582 if (!BUF_MEM_grow_clean(s->init_buf,
583 SSL2_MAX_RECORD_LENGTH_3_BYTE_HEADER))
584 {
585 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,ERR_R_BUF_LIB);
586 goto err;
587 }
588
589 s->state=SSL2_ST_GET_SERVER_HELLO_A;
590 if (!(s->client_version == SSL2_VERSION))
591 /* use special padding (SSL 3.0 draft/RFC 2246, App. E.2) */
592 s->s2->ssl2_rollback=1;
593
594 /* setup the 7 bytes we have read so we get them from
595 * the sslv2 buffer */
596 s->rstate=SSL_ST_READ_HEADER;
597 s->packet_length=n;
598 s->packet= &(s->s2->rbuf[0]);
599 memcpy(s->packet,buf,n);
600 s->s2->rbuf_left=n;
601 s->s2->rbuf_offs=0;
602
603 /* we have already written one */
604 s->s2->write_sequence=1;
605
606 s->method=SSLv2_client_method();
607 s->handshake_func=s->method->ssl_connect;
608 #endif
609 }
610 else if (p[1] == SSL3_VERSION_MAJOR &&
611 (p[2] == SSL3_VERSION_MINOR || p[2] == TLS1_VERSION_MINOR) &&
612 ((p[0] == SSL3_RT_HANDSHAKE && p[5] == SSL3_MT_SERVER_HELLO) ||
613 (p[0] == SSL3_RT_ALERT && p[3] == 0 && p[4] == 2)))
614 {
615 /* we have sslv3 or tls1 (server hello or alert) */
616
617 if ((p[2] == SSL3_VERSION_MINOR) &&
618 !(s->options & SSL_OP_NO_SSLv3))
619 {
620 s->version=SSL3_VERSION;
621 s->method=SSLv3_client_method();
622 }
623 else if ((p[2] == TLS1_VERSION_MINOR) &&
624 !(s->options & SSL_OP_NO_TLSv1))
625 {
626 s->version=TLS1_VERSION;
627 s->method=TLSv1_client_method();
628 }
629 else
630 {
631 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNSUPPORTED_PROTOCOL);
632 goto err;
633 }
634
635 if (p[0] == SSL3_RT_ALERT && p[5] != SSL3_AL_WARNING)
636 {
637 /* fatal alert */
638
639 void (*cb)(const SSL *ssl,int type,int val)=NULL;
640 int j;
641
642 if (s->info_callback != NULL)
643 cb=s->info_callback;
644 else if (s->ctx->info_callback != NULL)
645 cb=s->ctx->info_callback;
646
647 i=p[5];
648 if (cb != NULL)
649 {
650 j=(i<<8)|p[6];
651 cb(s,SSL_CB_READ_ALERT,j);
652 }
653
654 if (s->msg_callback)
655 s->msg_callback(0, s->version, SSL3_RT_ALERT, p+5, 2, s, s->msg_callback_arg);
656
657 s->rwstate=SSL_NOTHING;
658 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_AD_REASON_OFFSET+p[6]);
659 goto err;
660 }
661
662 if (!ssl_init_wbio_buffer(s,1)) goto err;
663
664 /* we are in this state */
665 s->state=SSL3_ST_CR_SRVR_HELLO_A;
666
667 /* put the 7 bytes we have read into the input buffer
668 * for SSLv3 */
669 s->rstate=SSL_ST_READ_HEADER;
670 s->packet_length=n;
671 if (s->s3->rbuf.buf == NULL)
672 if (!ssl3_setup_read_buffer(s))
673 goto err;
674 s->packet= &(s->s3->rbuf.buf[0]);
675 memcpy(s->packet,buf,n);
676 s->s3->rbuf.left=n;
677 s->s3->rbuf.offset=0;
678
679 s->handshake_func=s->method->ssl_connect;
680 }
681 else
682 {
683 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_UNKNOWN_PROTOCOL);
684 goto err;
685 }
686 s->init_num=0;
687
688 /* Since, if we are sending a ssl23 client hello, we are not
689 * reusing a session-id */
690 if (!s->session_creation_enabled)
691 {
692 if (!(s->client_version == SSL2_VERSION))
693 ssl3_send_alert(s,SSL3_AL_FATAL,SSL_AD_HANDSHAKE_FAILURE);
694 SSLerr(SSL_F_SSL23_GET_SERVER_HELLO,SSL_R_SESSION_MAY_NOT_BE_CREATED);
695 goto err;
696 }
697 if (!ssl_get_new_session(s,0))
698 goto err;
699
700 return(SSL_connect(s));
701 err:
702 return(-1);
703 }
704