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 <openssl/objects.h>
114 #include "ssl_locl.h"
116 const char *tls1_version_str="TLSv1" OPENSSL_VERSION_PTEXT;
118 SSL3_ENC_METHOD TLSv1_enc_data={
121 tls1_setup_key_block,
122 tls1_generate_master_secret,
123 tls1_change_cipher_state,
124 tls1_final_finish_mac,
125 TLS1_FINISH_MAC_LENGTH,
126 tls1_cert_verify_mac,
127 TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
128 TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
132 long tls1_default_timeout(void)
134 /* 2 hours, the 24 hours mentioned in the TLSv1 spec
135 * is way too long for http, the cache would over fill */
141 if (!ssl3_new(s)) return(0);
142 s->method->ssl_clear(s);
146 void tls1_free(SSL *s)
151 void tls1_clear(SSL *s)
154 s->version=TLS1_VERSION;
158 #ifndef OPENSSL_NO_TLSEXT
159 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
162 unsigned char *ret = p;
166 if (ret>=limit) return NULL; /* this really never occurs, but ... */
167 if (s->tlsext_hostname != NULL)
169 /* Add TLS extension servername to the Client Hello message */
170 unsigned long size_str;
173 /* check for enough space.
174 4 for the servername type and entension length
175 2 for servernamelist length
176 1 for the hostname type
177 2 for hostname length
181 if ((lenmax = limit - p - 9) < 0
182 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
185 /* extension type and length */
186 s2n(TLSEXT_TYPE_server_name,ret);
189 /* length of servername list */
192 /* hostname type, length and hostname */
193 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
195 memcpy(ret, s->tlsext_hostname, size_str);
199 #ifndef OPENSSL_NO_EC
200 if (s->tlsext_ecpointformatlist != NULL)
202 /* Add TLS extension ECPointFormats to the ClientHello message */
205 if ((lenmax = limit - p - 5) < 0) return NULL;
206 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
207 if (s->tlsext_ecpointformatlist_length > 255)
209 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
213 s2n(TLSEXT_TYPE_ec_point_formats,ret);
214 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
215 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
216 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
217 ret+=s->tlsext_ecpointformatlist_length;
219 if (s->tlsext_ellipticcurvelist != NULL)
221 /* Add TLS extension EllipticCurves to the ClientHello message */
224 if ((lenmax = limit - p - 6) < 0) return NULL;
225 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
226 if (s->tlsext_ellipticcurvelist_length > 65532)
228 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
232 s2n(TLSEXT_TYPE_elliptic_curves,ret);
233 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
235 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
236 * elliptic_curve_list, but the examples use two bytes.
237 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
238 * resolves this to two bytes.
240 s2n(s->tlsext_ellipticcurvelist_length, ret);
241 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
242 ret+=s->tlsext_ellipticcurvelist_length;
244 #endif /* OPENSSL_NO_EC */
246 if ((extdatalen = ret-p-2)== 0)
253 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
256 unsigned char *ret = p;
259 if (ret>=limit) return NULL; /* this really never occurs, but ... */
261 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
263 if (limit - p - 4 < 0) return NULL;
265 s2n(TLSEXT_TYPE_server_name,ret);
268 #ifndef OPENSSL_NO_EC
269 if (s->tlsext_ecpointformatlist != NULL)
271 /* Add TLS extension ECPointFormats to the ServerHello message */
274 if ((lenmax = limit - p - 5) < 0) return NULL;
275 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
276 if (s->tlsext_ecpointformatlist_length > 255)
278 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
282 s2n(TLSEXT_TYPE_ec_point_formats,ret);
283 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
284 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
285 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
286 ret+=s->tlsext_ecpointformatlist_length;
289 /* Currently the server should not respond with a SupportedCurves extension */
290 #endif /* OPENSSL_NO_EC */
292 if ((extdatalen = ret-p-2)== 0)
299 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
304 unsigned char *data = *p;
305 s->servername_done = 0;
311 if (data > (d+n-len))
314 while (data <= (d+n-4))
319 if (data+size > (d+n))
322 /* The servername extension is treated as follows:
324 - Only the hostname type is supported with a maximum length of 255.
325 - The servername is rejected if too long or if it contains zeros,
326 in which case an fatal alert is generated.
327 - The servername field is maintained together with the session cache.
328 - When a session is resumed, the servername call back invoked in order
329 to allow the application to position itself to the right context.
330 - The servername is acknowledged if it is new for a session or when
331 it is identical to a previously used for the same session.
332 Applications can control the behaviour. They can at any time
333 set a 'desirable' servername for a new SSL object. This can be the
334 case for example with HTTPS when a Host: header field is received and
335 a renegotiation is requested. In this case, a possible servername
336 presented in the new client hello is only acknowledged if it matches
337 the value of the Host: field.
338 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
339 if they provide for changing an explicit servername context for the session,
340 i.e. when the session has been established with a servername extension.
341 - On session reconnect, the servername extension may be absent.
345 if (type == TLSEXT_TYPE_server_name)
347 unsigned char *sdata;
353 *al = SSL_AD_DECODE_ERROR;
360 *al = SSL_AD_DECODE_ERROR;
367 servname_type = *(sdata++);
373 *al = SSL_AD_DECODE_ERROR;
376 if (s->servername_done == 0)
377 switch (servname_type)
379 case TLSEXT_NAMETYPE_host_name:
380 if (s->session->tlsext_hostname == NULL)
382 if (len > TLSEXT_MAXLEN_host_name ||
383 ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL))
385 *al = TLS1_AD_UNRECOGNIZED_NAME;
388 memcpy(s->session->tlsext_hostname, sdata, len);
389 s->session->tlsext_hostname[len]='\0';
390 if (strlen(s->session->tlsext_hostname) != len) {
391 OPENSSL_free(s->session->tlsext_hostname);
392 *al = TLS1_AD_UNRECOGNIZED_NAME;
395 s->servername_done = 1;
399 s->servername_done = strlen(s->session->tlsext_hostname) == len
400 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
412 *al = SSL_AD_DECODE_ERROR;
418 #ifndef OPENSSL_NO_EC
419 else if (type == TLSEXT_TYPE_ec_point_formats)
421 unsigned char *sdata = data;
422 int ecpointformatlist_length = *(sdata++);
424 if (ecpointformatlist_length != size - 1)
426 *al = TLS1_AD_DECODE_ERROR;
429 s->session->tlsext_ecpointformatlist_length = 0;
430 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
431 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
433 *al = TLS1_AD_INTERNAL_ERROR;
436 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
437 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
439 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
440 sdata = s->session->tlsext_ecpointformatlist;
441 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
442 fprintf(stderr,"%i ",*(sdata++));
443 fprintf(stderr,"\n");
446 else if (type == TLSEXT_TYPE_elliptic_curves)
448 unsigned char *sdata = data;
449 int ellipticcurvelist_length = (*(sdata++) << 8);
450 ellipticcurvelist_length += (*(sdata++));
452 if (ellipticcurvelist_length != size - 2)
454 *al = TLS1_AD_DECODE_ERROR;
457 s->session->tlsext_ellipticcurvelist_length = 0;
458 if (s->session->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->session->tlsext_ellipticcurvelist);
459 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
461 *al = TLS1_AD_INTERNAL_ERROR;
464 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
465 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
467 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
468 sdata = s->session->tlsext_ellipticcurvelist;
469 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
470 fprintf(stderr,"%i ",*(sdata++));
471 fprintf(stderr,"\n");
474 #endif /* OPENSSL_NO_EC */
482 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
487 unsigned char *data = *p;
489 int tlsext_servername = 0;
496 while(data <= (d+n-4))
501 if (data+size > (d+n))
504 if (type == TLSEXT_TYPE_server_name)
506 if (s->tlsext_hostname == NULL || size > 0)
508 *al = TLS1_AD_UNRECOGNIZED_NAME;
511 tlsext_servername = 1;
514 #ifndef OPENSSL_NO_EC
515 else if (type == TLSEXT_TYPE_ec_point_formats)
517 unsigned char *sdata = data;
518 int ecpointformatlist_length = *(sdata++);
520 if (ecpointformatlist_length != size - 1)
522 *al = TLS1_AD_DECODE_ERROR;
525 s->session->tlsext_ecpointformatlist_length = 0;
526 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
527 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
529 *al = TLS1_AD_INTERNAL_ERROR;
532 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
533 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
535 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
536 sdata = s->session->tlsext_ecpointformatlist;
537 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
538 fprintf(stderr,"%i ",*(sdata++));
539 fprintf(stderr,"\n");
542 #endif /* OPENSSL_NO_EC */
548 *al = SSL_AD_DECODE_ERROR;
552 if (!s->hit && tlsext_servername == 1)
554 if (s->tlsext_hostname)
556 if (s->session->tlsext_hostname == NULL)
558 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
559 if (!s->session->tlsext_hostname)
561 *al = SSL_AD_UNRECOGNIZED_NAME;
567 *al = SSL_AD_DECODE_ERROR;
577 #ifndef OPENSSL_NO_EC
578 static int nid_list[] =
580 NID_sect163k1, /* sect163k1 (1) */
581 NID_sect163r1, /* sect163r1 (2) */
582 NID_sect163r2, /* sect163r2 (3) */
583 NID_sect193r1, /* sect193r1 (4) */
584 NID_sect193r2, /* sect193r2 (5) */
585 NID_sect233k1, /* sect233k1 (6) */
586 NID_sect233r1, /* sect233r1 (7) */
587 NID_sect239k1, /* sect239k1 (8) */
588 NID_sect283k1, /* sect283k1 (9) */
589 NID_sect283r1, /* sect283r1 (10) */
590 NID_sect409k1, /* sect409k1 (11) */
591 NID_sect409r1, /* sect409r1 (12) */
592 NID_sect571k1, /* sect571k1 (13) */
593 NID_sect571r1, /* sect571r1 (14) */
594 NID_secp160k1, /* secp160k1 (15) */
595 NID_secp160r1, /* secp160r1 (16) */
596 NID_secp160r2, /* secp160r2 (17) */
597 NID_secp192k1, /* secp192k1 (18) */
598 NID_X9_62_prime192v1, /* secp192r1 (19) */
599 NID_secp224k1, /* secp224k1 (20) */
600 NID_secp224r1, /* secp224r1 (21) */
601 NID_secp256k1, /* secp256k1 (22) */
602 NID_X9_62_prime256v1, /* secp256r1 (23) */
603 NID_secp384r1, /* secp384r1 (24) */
604 NID_secp521r1 /* secp521r1 (25) */
607 int tls1_ec_curve_id2nid(int curve_id)
609 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
610 if ((curve_id < 1) || (curve_id > sizeof(nid_list)/sizeof(nid_list[0]))) return 0;
611 return nid_list[curve_id-1];
614 int tls1_ec_nid2curve_id(int nid)
616 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
619 case NID_sect163k1: /* sect163k1 (1) */
621 case NID_sect163r1: /* sect163r1 (2) */
623 case NID_sect163r2: /* sect163r2 (3) */
625 case NID_sect193r1: /* sect193r1 (4) */
627 case NID_sect193r2: /* sect193r2 (5) */
629 case NID_sect233k1: /* sect233k1 (6) */
631 case NID_sect233r1: /* sect233r1 (7) */
633 case NID_sect239k1: /* sect239k1 (8) */
635 case NID_sect283k1: /* sect283k1 (9) */
637 case NID_sect283r1: /* sect283r1 (10) */
639 case NID_sect409k1: /* sect409k1 (11) */
641 case NID_sect409r1: /* sect409r1 (12) */
643 case NID_sect571k1: /* sect571k1 (13) */
645 case NID_sect571r1: /* sect571r1 (14) */
647 case NID_secp160k1: /* secp160k1 (15) */
649 case NID_secp160r1: /* secp160r1 (16) */
651 case NID_secp160r2: /* secp160r2 (17) */
653 case NID_secp192k1: /* secp192k1 (18) */
655 case NID_X9_62_prime192v1: /* secp192r1 (19) */
657 case NID_secp224k1: /* secp224k1 (20) */
659 case NID_secp224r1: /* secp224r1 (21) */
661 case NID_secp256k1: /* secp256k1 (22) */
663 case NID_X9_62_prime256v1: /* secp256r1 (23) */
665 case NID_secp384r1: /* secp384r1 (24) */
667 case NID_secp521r1: /* secp521r1 (25) */
673 #endif /* OPENSSL_NO_EC */
675 int ssl_prepare_clienthello_tlsext(SSL *s)
677 #ifndef OPENSSL_NO_EC
678 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
679 * and elliptic curves we support.
685 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
686 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
688 algs = (sk_SSL_CIPHER_value(cipher_stack, i))->algorithms;
689 if ((algs & SSL_kECDH) || (algs & SSL_kECDHE) || (algs & SSL_aECDSA))
696 using_ecc = using_ecc && (s->version == TLS1_VERSION);
699 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
700 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
702 SSLerr(SSL_F_TLS1_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
705 s->tlsext_ecpointformatlist_length = 3;
706 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
707 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
708 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
710 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
711 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
712 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
713 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
715 s->tlsext_ellipticcurvelist_length = 0;
716 SSLerr(SSL_F_TLS1_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
719 for (i = 1, j = s->tlsext_ellipticcurvelist; i <= sizeof(nid_list)/sizeof(nid_list[0]); i++)
722 #endif /* OPENSSL_NO_EC */
726 int ssl_prepare_serverhello_tlsext(SSL *s)
728 #ifndef OPENSSL_NO_EC
729 /* If we are server and using an ECC cipher suite, send the point formats we support
730 * if the client sent us an ECPointsFormat extension. Note that the server is not
731 * supposed to send an EllipticCurves extension.
733 int algs = s->s3->tmp.new_cipher->algorithms;
734 int using_ecc = (algs & SSL_kECDH) || (algs & SSL_kECDHE) || (algs & SSL_aECDSA);
735 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
739 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
740 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
742 SSLerr(SSL_F_TLS1_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
745 s->tlsext_ecpointformatlist_length = 3;
746 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
747 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
748 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
750 #endif /* OPENSSL_NO_EC */
754 int ssl_check_clienthello_tlsext(SSL *s)
756 int ret=SSL_TLSEXT_ERR_NOACK;
757 int al = SSL_AD_UNRECOGNIZED_NAME;
759 #ifndef OPENSSL_NO_EC
760 /* The handling of the ECPointFormats extension is done elsewhere, namely in
761 * ssl3_choose_cipher in s3_lib.c.
763 /* The handling of the EllipticCurves extension is done elsewhere, namely in
764 * ssl3_choose_cipher in s3_lib.c.
768 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
769 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
770 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
771 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
774 case SSL_TLSEXT_ERR_ALERT_FATAL:
775 ssl3_send_alert(s,SSL3_AL_FATAL,al);
778 case SSL_TLSEXT_ERR_ALERT_WARNING:
779 ssl3_send_alert(s,SSL3_AL_WARNING,al);
782 case SSL_TLSEXT_ERR_NOACK:
783 s->servername_done=0;
789 int ssl_check_serverhello_tlsext(SSL *s)
791 int ret=SSL_TLSEXT_ERR_NOACK;
792 int al = SSL_AD_UNRECOGNIZED_NAME;
794 #ifndef OPENSSL_NO_EC
795 /* If we are client and using an elliptic curve cryptography cipher suite, then server
796 * must return a an EC point formats lists containing uncompressed.
798 int algs = s->s3->tmp.new_cipher->algorithms;
799 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
800 ((algs & SSL_kECDH) || (algs & SSL_kECDHE) || (algs & SSL_aECDSA)))
802 /* we are using an ECC cipher */
805 int found_uncompressed = 0;
806 if ((s->session->tlsext_ecpointformatlist == NULL) || (s->session->tlsext_ecpointformatlist_length == 0))
808 SSLerr(SSL_F_TLS1_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
811 list = s->session->tlsext_ecpointformatlist;
812 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
814 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
816 found_uncompressed = 1;
820 if (!found_uncompressed)
822 SSLerr(SSL_F_TLS1_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
826 ret = SSL_TLSEXT_ERR_OK;
827 #endif /* OPENSSL_NO_EC */
829 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
830 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
831 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
832 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
835 case SSL_TLSEXT_ERR_ALERT_FATAL:
836 ssl3_send_alert(s,SSL3_AL_FATAL,al);
839 case SSL_TLSEXT_ERR_ALERT_WARNING:
840 ssl3_send_alert(s,SSL3_AL_WARNING,al);
843 case SSL_TLSEXT_ERR_NOACK:
844 s->servername_done=0;