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) 1998-2007 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 <openssl/evp.h>
115 #include <openssl/hmac.h>
116 #include <openssl/ocsp.h>
117 #include <openssl/rand.h>
118 #include "ssl_locl.h"
120 const char tls1_version_str[]="TLSv1" OPENSSL_VERSION_PTEXT;
122 #ifndef OPENSSL_NO_TLSEXT
123 static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, int ticklen,
124 const unsigned char *sess_id, int sesslen,
125 SSL_SESSION **psess);
126 static int ssl_check_clienthello_tlsext(SSL *s);
127 int ssl_check_serverhello_tlsext(SSL *s);
130 SSL3_ENC_METHOD TLSv1_enc_data={
133 tls1_setup_key_block,
134 tls1_generate_master_secret,
135 tls1_change_cipher_state,
136 tls1_final_finish_mac,
137 TLS1_FINISH_MAC_LENGTH,
138 tls1_cert_verify_mac,
139 TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
140 TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
142 tls1_export_keying_material,
145 long tls1_default_timeout(void)
147 /* 2 hours, the 24 hours mentioned in the TLSv1 spec
148 * is way too long for http, the cache would over fill */
154 if (!ssl3_new(s)) return(0);
155 s->method->ssl_clear(s);
159 void tls1_free(SSL *s)
161 #ifndef OPENSSL_NO_TLSEXT
162 if (s->tlsext_session_ticket)
164 OPENSSL_free(s->tlsext_session_ticket);
166 #endif /* OPENSSL_NO_TLSEXT */
170 void tls1_clear(SSL *s)
173 s->version = s->method->version;
176 #ifndef OPENSSL_NO_EC
178 static int nid_list[] =
180 NID_sect163k1, /* sect163k1 (1) */
181 NID_sect163r1, /* sect163r1 (2) */
182 NID_sect163r2, /* sect163r2 (3) */
183 NID_sect193r1, /* sect193r1 (4) */
184 NID_sect193r2, /* sect193r2 (5) */
185 NID_sect233k1, /* sect233k1 (6) */
186 NID_sect233r1, /* sect233r1 (7) */
187 NID_sect239k1, /* sect239k1 (8) */
188 NID_sect283k1, /* sect283k1 (9) */
189 NID_sect283r1, /* sect283r1 (10) */
190 NID_sect409k1, /* sect409k1 (11) */
191 NID_sect409r1, /* sect409r1 (12) */
192 NID_sect571k1, /* sect571k1 (13) */
193 NID_sect571r1, /* sect571r1 (14) */
194 NID_secp160k1, /* secp160k1 (15) */
195 NID_secp160r1, /* secp160r1 (16) */
196 NID_secp160r2, /* secp160r2 (17) */
197 NID_secp192k1, /* secp192k1 (18) */
198 NID_X9_62_prime192v1, /* secp192r1 (19) */
199 NID_secp224k1, /* secp224k1 (20) */
200 NID_secp224r1, /* secp224r1 (21) */
201 NID_secp256k1, /* secp256k1 (22) */
202 NID_X9_62_prime256v1, /* secp256r1 (23) */
203 NID_secp384r1, /* secp384r1 (24) */
204 NID_secp521r1 /* secp521r1 (25) */
208 static const unsigned char ecformats_default[] =
210 TLSEXT_ECPOINTFORMAT_uncompressed,
211 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime,
212 TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2
215 static const unsigned char eccurves_default[] =
217 0,14, /* sect571r1 (14) */
218 0,13, /* sect571k1 (13) */
219 0,25, /* secp521r1 (25) */
220 0,11, /* sect409k1 (11) */
221 0,12, /* sect409r1 (12) */
222 0,24, /* secp384r1 (24) */
223 0,9, /* sect283k1 (9) */
224 0,10, /* sect283r1 (10) */
225 0,22, /* secp256k1 (22) */
226 0,23, /* secp256r1 (23) */
227 0,8, /* sect239k1 (8) */
228 0,6, /* sect233k1 (6) */
229 0,7, /* sect233r1 (7) */
230 0,20, /* secp224k1 (20) */
231 0,21, /* secp224r1 (21) */
232 0,4, /* sect193r1 (4) */
233 0,5, /* sect193r2 (5) */
234 0,18, /* secp192k1 (18) */
235 0,19, /* secp192r1 (19) */
236 0,1, /* sect163k1 (1) */
237 0,2, /* sect163r1 (2) */
238 0,3, /* sect163r2 (3) */
239 0,15, /* secp160k1 (15) */
240 0,16, /* secp160r1 (16) */
241 0,17, /* secp160r2 (17) */
244 int tls1_ec_curve_id2nid(int curve_id)
246 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
247 if ((curve_id < 1) || ((unsigned int)curve_id >
248 sizeof(nid_list)/sizeof(nid_list[0])))
250 return nid_list[curve_id-1];
253 int tls1_ec_nid2curve_id(int nid)
255 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
258 case NID_sect163k1: /* sect163k1 (1) */
260 case NID_sect163r1: /* sect163r1 (2) */
262 case NID_sect163r2: /* sect163r2 (3) */
264 case NID_sect193r1: /* sect193r1 (4) */
266 case NID_sect193r2: /* sect193r2 (5) */
268 case NID_sect233k1: /* sect233k1 (6) */
270 case NID_sect233r1: /* sect233r1 (7) */
272 case NID_sect239k1: /* sect239k1 (8) */
274 case NID_sect283k1: /* sect283k1 (9) */
276 case NID_sect283r1: /* sect283r1 (10) */
278 case NID_sect409k1: /* sect409k1 (11) */
280 case NID_sect409r1: /* sect409r1 (12) */
282 case NID_sect571k1: /* sect571k1 (13) */
284 case NID_sect571r1: /* sect571r1 (14) */
286 case NID_secp160k1: /* secp160k1 (15) */
288 case NID_secp160r1: /* secp160r1 (16) */
290 case NID_secp160r2: /* secp160r2 (17) */
292 case NID_secp192k1: /* secp192k1 (18) */
294 case NID_X9_62_prime192v1: /* secp192r1 (19) */
296 case NID_secp224k1: /* secp224k1 (20) */
298 case NID_secp224r1: /* secp224r1 (21) */
300 case NID_secp256k1: /* secp256k1 (22) */
302 case NID_X9_62_prime256v1: /* secp256r1 (23) */
304 case NID_secp384r1: /* secp384r1 (24) */
306 case NID_secp521r1: /* secp521r1 (25) */
312 /* Get curves list, if "sess" is set return client curves otherwise
315 static void tls1_get_curvelist(SSL *s, int sess,
316 const unsigned char **pcurves,
321 *pcurves = s->session->tlsext_ellipticcurvelist;
322 *pcurveslen = s->session->tlsext_ellipticcurvelist_length;
326 *pcurves = s->tlsext_ellipticcurvelist;
327 *pcurveslen = s->tlsext_ellipticcurvelist_length;
329 /* If not set use default: for now static structure */
332 *pcurves = eccurves_default;
333 *pcurveslen = sizeof(eccurves_default);
337 /* Return nth shared curve. If nmatch == -1 return number of
341 int tls1_shared_curve(SSL *s, int nmatch)
343 const unsigned char *pref, *supp;
344 size_t preflen, supplen, i, j;
346 /* Can't do anything on client side */
349 tls1_get_curvelist(s, !!(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE),
351 tls1_get_curvelist(s, !(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE),
356 for (i = 0; i < preflen; i++, pref+=2)
358 const unsigned char *tsupp = supp;
359 for (j = 0; j < supplen; j++, tsupp+=2)
361 if (pref[0] == tsupp[0] && pref[1] == tsupp[1])
365 int id = (pref[0] << 8) | pref[1];
366 return tls1_ec_curve_id2nid(id);
377 int tls1_set_curves(unsigned char **pext, size_t *pextlen,
378 int *curves, size_t ncurves)
380 unsigned char *clist, *p;
382 /* Bitmap of curves included to detect duplicates: only works
383 * while curve ids < 32
385 unsigned long dup_list = 0;
386 clist = OPENSSL_malloc(ncurves * 2);
389 for (i = 0, p = clist; i < ncurves; i++)
391 unsigned long idmask;
393 id = tls1_ec_nid2curve_id(curves[i]);
395 if (!id || (dup_list & idmask))
406 *pextlen = ncurves * 2;
410 #define MAX_CURVELIST 25
415 int nid_arr[MAX_CURVELIST];
418 static int nid_cb(const char *elem, int len, void *arg)
420 nid_cb_st *narg = arg;
424 if (narg->nidcnt == MAX_CURVELIST)
426 if (len > (int)(sizeof(etmp) - 1))
428 memcpy(etmp, elem, len);
430 nid = EC_curve_nist2nid(etmp);
431 if (nid == NID_undef)
432 nid = OBJ_sn2nid(etmp);
433 if (nid == NID_undef)
434 nid = OBJ_ln2nid(etmp);
435 if (nid == NID_undef)
437 for (i = 0; i < narg->nidcnt; i++)
438 if (narg->nid_arr[i] == nid)
440 narg->nid_arr[narg->nidcnt++] = nid;
443 /* Set curves based on a colon separate list */
444 int tls1_set_curves_list(unsigned char **pext, size_t *pextlen,
449 if (!CONF_parse_list(str, ':', 1, nid_cb, &ncb))
451 return tls1_set_curves(pext, pextlen, ncb.nid_arr, ncb.nidcnt);
453 /* For an EC key set TLS id and required compression based on parameters */
454 static int tls1_set_ec_id(unsigned char *curve_id, unsigned char *comp_id,
460 const EC_METHOD *meth;
463 /* Determine if it is a prime field */
464 grp = EC_KEY_get0_group(ec);
465 pt = EC_KEY_get0_public_key(ec);
468 meth = EC_GROUP_method_of(grp);
471 if (EC_METHOD_get_field_type(meth) == NID_X9_62_prime_field)
475 /* Determine curve ID */
476 id = EC_GROUP_get_curve_name(grp);
477 id = tls1_ec_nid2curve_id(id);
478 /* If we have an ID set it, otherwise set arbitrary explicit curve */
482 curve_id[1] = (unsigned char)id;
494 if (EC_KEY_get_conv_form(ec) == POINT_CONVERSION_COMPRESSED)
497 *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
499 *comp_id = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
502 *comp_id = TLSEXT_ECPOINTFORMAT_uncompressed;
506 /* Check an EC key is compatible with extensions */
507 static int tls1_check_ec_key(SSL *s,
508 unsigned char *curve_id, unsigned char *comp_id)
510 const unsigned char *p;
513 /* If point formats extension present check it, otherwise everything
514 * is supported (see RFC4492).
516 if (comp_id && s->session->tlsext_ecpointformatlist)
518 p = s->session->tlsext_ecpointformatlist;
519 plen = s->session->tlsext_ecpointformatlist_length;
520 for (i = 0; i < plen; i++, p++)
528 /* Check curve is consistent with client and server preferences */
529 for (j = 0; j <= 1; j++)
531 tls1_get_curvelist(s, j, &p, &plen);
532 for (i = 0; i < plen; i+=2, p+=2)
534 if (p[0] == curve_id[0] && p[1] == curve_id[1])
542 /* Check EC server key is compatible with client extensions */
543 int tls1_check_ec_server_key(SSL *s)
546 CERT_PKEY *cpk = s->cert->pkeys + SSL_PKEY_ECC;
548 unsigned char comp_id, curve_id[2];
549 if (!cpk->x509 || !cpk->privatekey)
551 pkey = X509_get_pubkey(cpk->x509);
554 rv = tls1_set_ec_id(curve_id, &comp_id, pkey->pkey.ec);
558 return tls1_check_ec_key(s, curve_id, &comp_id);
560 /* Check EC temporary key is compatible with client extensions */
561 int tls1_check_ec_tmp_key(SSL *s)
563 unsigned char curve_id[2];
564 EC_KEY *ec = s->cert->ecdh_tmp;
565 if (s->cert->ecdh_tmp_auto)
567 /* Need a shared curve */
568 if (tls1_shared_curve(s, 0))
574 if (s->cert->ecdh_tmp_cb)
579 if (!tls1_set_ec_id(curve_id, NULL, ec))
581 return tls1_check_ec_key(s, curve_id, NULL);
584 #endif /* OPENSSL_NO_EC */
586 #ifndef OPENSSL_NO_TLSEXT
588 /* List of supported signature algorithms and hashes. Should make this
589 * customisable at some point, for now include everything we support.
592 #ifdef OPENSSL_NO_RSA
593 #define tlsext_sigalg_rsa(md) /* */
595 #define tlsext_sigalg_rsa(md) md, TLSEXT_signature_rsa,
598 #ifdef OPENSSL_NO_DSA
599 #define tlsext_sigalg_dsa(md) /* */
601 #define tlsext_sigalg_dsa(md) md, TLSEXT_signature_dsa,
604 #ifdef OPENSSL_NO_ECDSA
605 #define tlsext_sigalg_ecdsa(md) /* */
607 #define tlsext_sigalg_ecdsa(md) md, TLSEXT_signature_ecdsa,
610 #define tlsext_sigalg(md) \
611 tlsext_sigalg_rsa(md) \
612 tlsext_sigalg_dsa(md) \
613 tlsext_sigalg_ecdsa(md)
615 static unsigned char tls12_sigalgs[] = {
616 #ifndef OPENSSL_NO_SHA512
617 tlsext_sigalg(TLSEXT_hash_sha512)
618 tlsext_sigalg(TLSEXT_hash_sha384)
620 #ifndef OPENSSL_NO_SHA256
621 tlsext_sigalg(TLSEXT_hash_sha256)
622 tlsext_sigalg(TLSEXT_hash_sha224)
624 #ifndef OPENSSL_NO_SHA
625 tlsext_sigalg(TLSEXT_hash_sha1)
627 #ifndef OPENSSL_NO_MD5
628 tlsext_sigalg_rsa(TLSEXT_hash_md5)
632 size_t tls12_get_sig_algs(SSL *s, unsigned char *p)
634 const unsigned char *sigs;
636 sigs = s->cert->conf_sigalgs;
639 sigslen = s->cert->conf_sigalgslen;
642 sigs = tls12_sigalgs;
643 sigslen = sizeof(tls12_sigalgs);
645 /* If FIPS mode don't include MD5 which is last */
652 memcpy(p, sigs, sigslen);
656 /* byte_compare is a compare function for qsort(3) that compares bytes. */
657 static int byte_compare(const void *in_a, const void *in_b)
659 unsigned char a = *((const unsigned char*) in_a);
660 unsigned char b = *((const unsigned char*) in_b);
669 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
672 unsigned char *ret = p;
673 #ifndef OPENSSL_NO_EC
674 /* See if we support any ECC ciphersuites */
676 if (s->version != DTLS1_VERSION && s->version >= TLS1_VERSION)
679 unsigned long alg_k, alg_a;
680 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
682 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
684 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
686 alg_k = c->algorithm_mkey;
687 alg_a = c->algorithm_auth;
688 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)
689 || (alg_a & SSL_aECDSA)))
698 /* don't add extensions for SSLv3 unless doing secure renegotiation */
699 if (s->client_version == SSL3_VERSION
700 && !s->s3->send_connection_binding)
705 if (ret>=limit) return NULL; /* this really never occurs, but ... */
707 if (s->tlsext_hostname != NULL)
709 /* Add TLS extension servername to the Client Hello message */
710 unsigned long size_str;
713 /* check for enough space.
714 4 for the servername type and entension length
715 2 for servernamelist length
716 1 for the hostname type
717 2 for hostname length
721 if ((lenmax = limit - ret - 9) < 0
722 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
725 /* extension type and length */
726 s2n(TLSEXT_TYPE_server_name,ret);
729 /* length of servername list */
732 /* hostname type, length and hostname */
733 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
735 memcpy(ret, s->tlsext_hostname, size_str);
739 /* Add RI if renegotiating */
744 if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
746 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
750 if((limit - p - 4 - el) < 0) return NULL;
752 s2n(TLSEXT_TYPE_renegotiate,ret);
755 if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
757 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
764 #ifndef OPENSSL_NO_SRP
765 /* Add SRP username if there is one */
766 if (s->srp_ctx.login != NULL)
767 { /* Add TLS extension SRP username to the Client Hello message */
769 int login_len = strlen(s->srp_ctx.login);
770 if (login_len > 255 || login_len == 0)
772 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
776 /* check for enough space.
777 4 for the srp type type and entension length
778 1 for the srp user identity
779 + srp user identity length
781 if ((limit - ret - 5 - login_len) < 0) return NULL;
783 /* fill in the extension */
784 s2n(TLSEXT_TYPE_srp,ret);
785 s2n(login_len+1,ret);
786 (*ret++) = (unsigned char) login_len;
787 memcpy(ret, s->srp_ctx.login, login_len);
792 #ifndef OPENSSL_NO_EC
795 /* Add TLS extension ECPointFormats to the ClientHello message */
797 const unsigned char *plist;
799 /* If we have a custom point format list use it otherwise
801 plist = s->tlsext_ecpointformatlist;
803 plistlen = s->tlsext_ecpointformatlist_length;
806 plist = ecformats_default;
807 plistlen = sizeof(ecformats_default);
810 if ((lenmax = limit - ret - 5) < 0) return NULL;
811 if (plistlen > (size_t)lenmax) return NULL;
814 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
818 s2n(TLSEXT_TYPE_ec_point_formats,ret);
819 s2n(plistlen + 1,ret);
820 *(ret++) = (unsigned char)plistlen ;
821 memcpy(ret, plist, plistlen);
824 /* Add TLS extension EllipticCurves to the ClientHello message */
825 plist = s->tlsext_ellipticcurvelist;
826 tls1_get_curvelist(s, 0, &plist, &plistlen);
828 if ((lenmax = limit - ret - 6) < 0) return NULL;
829 if (plistlen > (size_t)lenmax) return NULL;
830 if (plistlen > 65532)
832 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
836 s2n(TLSEXT_TYPE_elliptic_curves,ret);
837 s2n(plistlen + 2, ret);
839 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
840 * elliptic_curve_list, but the examples use two bytes.
841 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
842 * resolves this to two bytes.
845 memcpy(ret, plist, plistlen);
848 #endif /* OPENSSL_NO_EC */
850 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
853 if (!s->new_session && s->session && s->session->tlsext_tick)
854 ticklen = s->session->tlsext_ticklen;
855 else if (s->session && s->tlsext_session_ticket &&
856 s->tlsext_session_ticket->data)
858 ticklen = s->tlsext_session_ticket->length;
859 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
860 if (!s->session->tlsext_tick)
862 memcpy(s->session->tlsext_tick,
863 s->tlsext_session_ticket->data,
865 s->session->tlsext_ticklen = ticklen;
869 if (ticklen == 0 && s->tlsext_session_ticket &&
870 s->tlsext_session_ticket->data == NULL)
872 /* Check for enough room 2 for extension type, 2 for len
875 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
876 s2n(TLSEXT_TYPE_session_ticket,ret);
880 memcpy(ret, s->session->tlsext_tick, ticklen);
886 if (TLS1_get_client_version(s) >= TLS1_2_VERSION)
889 salglen = tls12_get_sig_algs(s, NULL);
890 if ((size_t)(limit - ret) < salglen + 6)
892 s2n(TLSEXT_TYPE_signature_algorithms,ret);
893 s2n(salglen + 2, ret);
895 tls12_get_sig_algs(s, ret);
899 #ifdef TLSEXT_TYPE_opaque_prf_input
900 if (s->s3->client_opaque_prf_input != NULL &&
901 s->version != DTLS1_VERSION)
903 size_t col = s->s3->client_opaque_prf_input_len;
905 if ((long)(limit - ret - 6 - col < 0))
907 if (col > 0xFFFD) /* can't happen */
910 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
913 memcpy(ret, s->s3->client_opaque_prf_input, col);
918 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
919 s->version != DTLS1_VERSION)
922 long extlen, idlen, itmp;
926 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
928 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
929 itmp = i2d_OCSP_RESPID(id, NULL);
935 if (s->tlsext_ocsp_exts)
937 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
944 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
945 s2n(TLSEXT_TYPE_status_request, ret);
946 if (extlen + idlen > 0xFFF0)
948 s2n(extlen + idlen + 5, ret);
949 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
951 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
953 /* save position of id len */
954 unsigned char *q = ret;
955 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
956 /* skip over id len */
958 itmp = i2d_OCSP_RESPID(id, &ret);
964 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
967 #ifndef OPENSSL_NO_HEARTBEATS
968 /* Add Heartbeat extension */
969 s2n(TLSEXT_TYPE_heartbeat,ret);
972 * 1: peer may send requests
973 * 2: peer not allowed to send requests
975 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
976 *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
978 *(ret++) = SSL_TLSEXT_HB_ENABLED;
981 #ifndef OPENSSL_NO_NEXTPROTONEG
982 if (s->ctx->next_proto_select_cb && !s->s3->tmp.finish_md_len)
984 /* The client advertises an emtpy extension to indicate its
985 * support for Next Protocol Negotiation */
986 if (limit - ret - 4 < 0)
988 s2n(TLSEXT_TYPE_next_proto_neg,ret);
993 if(SSL_get_srtp_profiles(s))
997 ssl_add_clienthello_use_srtp_ext(s, 0, &el, 0);
999 if((limit - p - 4 - el) < 0) return NULL;
1001 s2n(TLSEXT_TYPE_use_srtp,ret);
1004 if(ssl_add_clienthello_use_srtp_ext(s, ret, &el, el))
1006 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1012 /* Add TLS extension Server_Authz_DataFormats to the ClientHello */
1013 /* 2 bytes for extension type */
1014 /* 2 bytes for extension length */
1015 /* 1 byte for the list length */
1016 /* 1 byte for the list (we only support audit proofs) */
1017 if (s->ctx->tlsext_authz_server_audit_proof_cb != NULL)
1020 const unsigned short ext_len = 2;
1021 const unsigned char list_len = 1;
1023 if ((lenmax = limit - ret - 6) < 0) return NULL;
1025 s2n(TLSEXT_TYPE_server_authz, ret);
1026 /* Extension length: 2 bytes */
1028 *(ret++) = list_len;
1029 *(ret++) = TLSEXT_AUTHZDATAFORMAT_audit_proof;
1032 if ((extdatalen = ret-p-2) == 0)
1039 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
1042 unsigned char *ret = p;
1043 #ifndef OPENSSL_NO_NEXTPROTONEG
1044 int next_proto_neg_seen;
1047 /* don't add extensions for SSLv3, unless doing secure renegotiation */
1048 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
1052 if (ret>=limit) return NULL; /* this really never occurs, but ... */
1054 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
1056 if ((long)(limit - ret - 4) < 0) return NULL;
1058 s2n(TLSEXT_TYPE_server_name,ret);
1062 if(s->s3->send_connection_binding)
1066 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
1068 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1072 if((limit - p - 4 - el) < 0) return NULL;
1074 s2n(TLSEXT_TYPE_renegotiate,ret);
1077 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
1079 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1086 #ifndef OPENSSL_NO_EC
1087 if (s->tlsext_ecpointformatlist != NULL &&
1088 s->version != DTLS1_VERSION)
1090 /* Add TLS extension ECPointFormats to the ServerHello message */
1093 if ((lenmax = limit - ret - 5) < 0) return NULL;
1094 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
1095 if (s->tlsext_ecpointformatlist_length > 255)
1097 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1101 s2n(TLSEXT_TYPE_ec_point_formats,ret);
1102 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
1103 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
1104 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
1105 ret+=s->tlsext_ecpointformatlist_length;
1108 /* Currently the server should not respond with a SupportedCurves extension */
1109 #endif /* OPENSSL_NO_EC */
1111 if (s->tlsext_ticket_expected
1112 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
1114 if ((long)(limit - ret - 4) < 0) return NULL;
1115 s2n(TLSEXT_TYPE_session_ticket,ret);
1119 if (s->tlsext_status_expected)
1121 if ((long)(limit - ret - 4) < 0) return NULL;
1122 s2n(TLSEXT_TYPE_status_request,ret);
1126 #ifdef TLSEXT_TYPE_opaque_prf_input
1127 if (s->s3->server_opaque_prf_input != NULL &&
1128 s->version != DTLS1_VERSION)
1130 size_t sol = s->s3->server_opaque_prf_input_len;
1132 if ((long)(limit - ret - 6 - sol) < 0)
1134 if (sol > 0xFFFD) /* can't happen */
1137 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
1140 memcpy(ret, s->s3->server_opaque_prf_input, sol);
1149 ssl_add_serverhello_use_srtp_ext(s, 0, &el, 0);
1151 if((limit - p - 4 - el) < 0) return NULL;
1153 s2n(TLSEXT_TYPE_use_srtp,ret);
1156 if(ssl_add_serverhello_use_srtp_ext(s, ret, &el, el))
1158 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1164 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
1165 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
1166 { const unsigned char cryptopro_ext[36] = {
1167 0xfd, 0xe8, /*65000*/
1168 0x00, 0x20, /*32 bytes length*/
1169 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
1170 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
1171 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
1172 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
1173 if (limit-ret<36) return NULL;
1174 memcpy(ret,cryptopro_ext,36);
1179 #ifndef OPENSSL_NO_HEARTBEATS
1180 /* Add Heartbeat extension if we've received one */
1181 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED)
1183 s2n(TLSEXT_TYPE_heartbeat,ret);
1186 * 1: peer may send requests
1187 * 2: peer not allowed to send requests
1189 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
1190 *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
1192 *(ret++) = SSL_TLSEXT_HB_ENABLED;
1197 #ifndef OPENSSL_NO_NEXTPROTONEG
1198 next_proto_neg_seen = s->s3->next_proto_neg_seen;
1199 s->s3->next_proto_neg_seen = 0;
1200 if (next_proto_neg_seen && s->ctx->next_protos_advertised_cb)
1202 const unsigned char *npa;
1203 unsigned int npalen;
1206 r = s->ctx->next_protos_advertised_cb(s, &npa, &npalen, s->ctx->next_protos_advertised_cb_arg);
1207 if (r == SSL_TLSEXT_ERR_OK)
1209 if ((long)(limit - ret - 4 - npalen) < 0) return NULL;
1210 s2n(TLSEXT_TYPE_next_proto_neg,ret);
1212 memcpy(ret, npa, npalen);
1214 s->s3->next_proto_neg_seen = 1;
1219 /* If the client supports authz then see whether we have any to offer
1221 if (s->s3->tlsext_authz_client_types_len)
1223 size_t authz_length;
1224 /* By now we already know the new cipher, so we can look ahead
1225 * to see whether the cert we are going to send
1226 * has any authz data attached to it. */
1227 const unsigned char* authz = ssl_get_authz_data(s, &authz_length);
1228 const unsigned char* const orig_authz = authz;
1230 unsigned authz_count = 0;
1232 /* The authz data contains a number of the following structures:
1233 * uint8_t authz_type
1235 * uint8_t data[length]
1237 * First we walk over it to find the number of authz elements. */
1238 for (i = 0; i < authz_length; i++)
1240 unsigned short length;
1244 if (memchr(s->s3->tlsext_authz_client_types,
1246 s->s3->tlsext_authz_client_types_len) != NULL)
1250 /* n2s increments authz by 2 */
1258 /* Add TLS extension server_authz to the ServerHello message
1259 * 2 bytes for extension type
1260 * 2 bytes for extension length
1261 * 1 byte for the list length
1262 * n bytes for the list */
1263 const unsigned short ext_len = 1 + authz_count;
1265 if ((long)(limit - ret - 4 - ext_len) < 0) return NULL;
1266 s2n(TLSEXT_TYPE_server_authz, ret);
1268 *(ret++) = authz_count;
1269 s->s3->tlsext_authz_promised_to_client = 1;
1273 for (i = 0; i < authz_length; i++)
1275 unsigned short length;
1280 if (memchr(s->s3->tlsext_authz_client_types,
1282 s->s3->tlsext_authz_client_types_len) != NULL)
1285 /* n2s increments authz by 2 */
1292 if ((extdatalen = ret-p-2)== 0)
1299 static int ssl_scan_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1301 unsigned short type;
1302 unsigned short size;
1304 unsigned char *data = *p;
1305 int renegotiate_seen = 0;
1307 s->servername_done = 0;
1308 s->tlsext_status_type = -1;
1309 #ifndef OPENSSL_NO_NEXTPROTONEG
1310 s->s3->next_proto_neg_seen = 0;
1313 #ifndef OPENSSL_NO_HEARTBEATS
1314 s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
1315 SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
1317 /* Clear any signature algorithms extension received */
1318 if (s->cert->peer_sigalgs)
1320 OPENSSL_free(s->cert->peer_sigalgs);
1321 s->cert->peer_sigalgs = NULL;
1323 /* Clear any shared sigtnature algorithms */
1324 if (s->cert->shared_sigalgs)
1326 OPENSSL_free(s->cert->shared_sigalgs);
1327 s->cert->shared_sigalgs = NULL;
1330 if (data >= (d+n-2))
1334 if (data > (d+n-len))
1337 while (data <= (d+n-4))
1342 if (data+size > (d+n))
1345 fprintf(stderr,"Received extension type %d size %d\n",type,size);
1347 if (s->tlsext_debug_cb)
1348 s->tlsext_debug_cb(s, 0, type, data, size,
1349 s->tlsext_debug_arg);
1350 /* The servername extension is treated as follows:
1352 - Only the hostname type is supported with a maximum length of 255.
1353 - The servername is rejected if too long or if it contains zeros,
1354 in which case an fatal alert is generated.
1355 - The servername field is maintained together with the session cache.
1356 - When a session is resumed, the servername call back invoked in order
1357 to allow the application to position itself to the right context.
1358 - The servername is acknowledged if it is new for a session or when
1359 it is identical to a previously used for the same session.
1360 Applications can control the behaviour. They can at any time
1361 set a 'desirable' servername for a new SSL object. This can be the
1362 case for example with HTTPS when a Host: header field is received and
1363 a renegotiation is requested. In this case, a possible servername
1364 presented in the new client hello is only acknowledged if it matches
1365 the value of the Host: field.
1366 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
1367 if they provide for changing an explicit servername context for the session,
1368 i.e. when the session has been established with a servername extension.
1369 - On session reconnect, the servername extension may be absent.
1373 if (type == TLSEXT_TYPE_server_name)
1375 unsigned char *sdata;
1381 *al = SSL_AD_DECODE_ERROR;
1388 *al = SSL_AD_DECODE_ERROR;
1395 servname_type = *(sdata++);
1401 *al = SSL_AD_DECODE_ERROR;
1404 if (s->servername_done == 0)
1405 switch (servname_type)
1407 case TLSEXT_NAMETYPE_host_name:
1410 if(s->session->tlsext_hostname)
1412 *al = SSL_AD_DECODE_ERROR;
1415 if (len > TLSEXT_MAXLEN_host_name)
1417 *al = TLS1_AD_UNRECOGNIZED_NAME;
1420 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
1422 *al = TLS1_AD_INTERNAL_ERROR;
1425 memcpy(s->session->tlsext_hostname, sdata, len);
1426 s->session->tlsext_hostname[len]='\0';
1427 if (strlen(s->session->tlsext_hostname) != len) {
1428 OPENSSL_free(s->session->tlsext_hostname);
1429 s->session->tlsext_hostname = NULL;
1430 *al = TLS1_AD_UNRECOGNIZED_NAME;
1433 s->servername_done = 1;
1437 s->servername_done = s->session->tlsext_hostname
1438 && strlen(s->session->tlsext_hostname) == len
1439 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
1451 *al = SSL_AD_DECODE_ERROR;
1456 #ifndef OPENSSL_NO_SRP
1457 else if (type == TLSEXT_TYPE_srp)
1459 if (size <= 0 || ((len = data[0])) != (size -1))
1461 *al = SSL_AD_DECODE_ERROR;
1464 if (s->srp_ctx.login != NULL)
1466 *al = SSL_AD_DECODE_ERROR;
1469 if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
1471 memcpy(s->srp_ctx.login, &data[1], len);
1472 s->srp_ctx.login[len]='\0';
1474 if (strlen(s->srp_ctx.login) != len)
1476 *al = SSL_AD_DECODE_ERROR;
1482 #ifndef OPENSSL_NO_EC
1483 else if (type == TLSEXT_TYPE_ec_point_formats &&
1484 s->version != DTLS1_VERSION)
1486 unsigned char *sdata = data;
1487 int ecpointformatlist_length = *(sdata++);
1489 if (ecpointformatlist_length != size - 1)
1491 *al = TLS1_AD_DECODE_ERROR;
1496 if(s->session->tlsext_ecpointformatlist)
1498 OPENSSL_free(s->session->tlsext_ecpointformatlist);
1499 s->session->tlsext_ecpointformatlist = NULL;
1501 s->session->tlsext_ecpointformatlist_length = 0;
1502 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1504 *al = TLS1_AD_INTERNAL_ERROR;
1507 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1508 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1511 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
1512 sdata = s->session->tlsext_ecpointformatlist;
1513 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1514 fprintf(stderr,"%i ",*(sdata++));
1515 fprintf(stderr,"\n");
1518 else if (type == TLSEXT_TYPE_elliptic_curves &&
1519 s->version != DTLS1_VERSION)
1521 unsigned char *sdata = data;
1522 int ellipticcurvelist_length = (*(sdata++) << 8);
1523 ellipticcurvelist_length += (*(sdata++));
1525 if (ellipticcurvelist_length != size - 2)
1527 *al = TLS1_AD_DECODE_ERROR;
1532 if(s->session->tlsext_ellipticcurvelist)
1534 *al = TLS1_AD_DECODE_ERROR;
1537 s->session->tlsext_ellipticcurvelist_length = 0;
1538 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
1540 *al = TLS1_AD_INTERNAL_ERROR;
1543 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
1544 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
1547 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
1548 sdata = s->session->tlsext_ellipticcurvelist;
1549 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
1550 fprintf(stderr,"%i ",*(sdata++));
1551 fprintf(stderr,"\n");
1554 #endif /* OPENSSL_NO_EC */
1555 #ifdef TLSEXT_TYPE_opaque_prf_input
1556 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1557 s->version != DTLS1_VERSION)
1559 unsigned char *sdata = data;
1563 *al = SSL_AD_DECODE_ERROR;
1566 n2s(sdata, s->s3->client_opaque_prf_input_len);
1567 if (s->s3->client_opaque_prf_input_len != size - 2)
1569 *al = SSL_AD_DECODE_ERROR;
1573 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1574 OPENSSL_free(s->s3->client_opaque_prf_input);
1575 if (s->s3->client_opaque_prf_input_len == 0)
1576 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1578 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
1579 if (s->s3->client_opaque_prf_input == NULL)
1581 *al = TLS1_AD_INTERNAL_ERROR;
1586 else if (type == TLSEXT_TYPE_session_ticket)
1588 if (s->tls_session_ticket_ext_cb &&
1589 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1591 *al = TLS1_AD_INTERNAL_ERROR;
1595 else if (type == TLSEXT_TYPE_renegotiate)
1597 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
1599 renegotiate_seen = 1;
1601 else if (type == TLSEXT_TYPE_signature_algorithms)
1604 if (s->cert->peer_sigalgs || size < 2)
1606 *al = SSL_AD_DECODE_ERROR;
1611 if (dsize != size || dsize & 1 || !dsize)
1613 *al = SSL_AD_DECODE_ERROR;
1616 if (!tls1_process_sigalgs(s, data, dsize))
1618 *al = SSL_AD_DECODE_ERROR;
1621 /* If sigalgs received and no shared algorithms fatal
1624 if (s->cert->peer_sigalgs && !s->cert->shared_sigalgs)
1626 SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
1627 SSL_R_NO_SHARED_SIGATURE_ALGORITHMS);
1628 *al = SSL_AD_ILLEGAL_PARAMETER;
1632 else if (type == TLSEXT_TYPE_status_request &&
1633 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
1638 *al = SSL_AD_DECODE_ERROR;
1642 s->tlsext_status_type = *data++;
1644 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
1646 const unsigned char *sdata;
1648 /* Read in responder_id_list */
1653 *al = SSL_AD_DECODE_ERROR;
1662 *al = SSL_AD_DECODE_ERROR;
1666 dsize -= 2 + idsize;
1670 *al = SSL_AD_DECODE_ERROR;
1675 id = d2i_OCSP_RESPID(NULL,
1679 *al = SSL_AD_DECODE_ERROR;
1684 OCSP_RESPID_free(id);
1685 *al = SSL_AD_DECODE_ERROR;
1688 if (!s->tlsext_ocsp_ids
1689 && !(s->tlsext_ocsp_ids =
1690 sk_OCSP_RESPID_new_null()))
1692 OCSP_RESPID_free(id);
1693 *al = SSL_AD_INTERNAL_ERROR;
1696 if (!sk_OCSP_RESPID_push(
1697 s->tlsext_ocsp_ids, id))
1699 OCSP_RESPID_free(id);
1700 *al = SSL_AD_INTERNAL_ERROR;
1705 /* Read in request_extensions */
1708 *al = SSL_AD_DECODE_ERROR;
1715 *al = SSL_AD_DECODE_ERROR;
1721 if (s->tlsext_ocsp_exts)
1723 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
1724 X509_EXTENSION_free);
1727 s->tlsext_ocsp_exts =
1728 d2i_X509_EXTENSIONS(NULL,
1730 if (!s->tlsext_ocsp_exts
1731 || (data + dsize != sdata))
1733 *al = SSL_AD_DECODE_ERROR;
1738 /* We don't know what to do with any other type
1742 s->tlsext_status_type = -1;
1744 #ifndef OPENSSL_NO_HEARTBEATS
1745 else if (type == TLSEXT_TYPE_heartbeat)
1749 case 0x01: /* Client allows us to send HB requests */
1750 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1752 case 0x02: /* Client doesn't accept HB requests */
1753 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1754 s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
1756 default: *al = SSL_AD_ILLEGAL_PARAMETER;
1761 #ifndef OPENSSL_NO_NEXTPROTONEG
1762 else if (type == TLSEXT_TYPE_next_proto_neg &&
1763 s->s3->tmp.finish_md_len == 0)
1765 /* We shouldn't accept this extension on a
1768 * s->new_session will be set on renegotiation, but we
1769 * probably shouldn't rely that it couldn't be set on
1770 * the initial renegotation too in certain cases (when
1771 * there's some other reason to disallow resuming an
1772 * earlier session -- the current code won't be doing
1773 * anything like that, but this might change).
1775 * A valid sign that there's been a previous handshake
1776 * in this connection is if s->s3->tmp.finish_md_len >
1777 * 0. (We are talking about a check that will happen
1778 * in the Hello protocol round, well before a new
1779 * Finished message could have been computed.) */
1780 s->s3->next_proto_neg_seen = 1;
1784 /* session ticket processed earlier */
1785 else if (type == TLSEXT_TYPE_use_srtp)
1787 if(ssl_parse_clienthello_use_srtp_ext(s, data, size,
1792 else if (type == TLSEXT_TYPE_server_authz)
1794 unsigned char *sdata = data;
1795 unsigned char server_authz_dataformatlist_length;
1799 *al = TLS1_AD_DECODE_ERROR;
1803 server_authz_dataformatlist_length = *(sdata++);
1805 if (server_authz_dataformatlist_length != size - 1)
1807 *al = TLS1_AD_DECODE_ERROR;
1811 /* Successful session resumption uses the same authz
1812 * information as the original session so we ignore this
1813 * in the case of a session resumption. */
1817 if (s->s3->tlsext_authz_client_types != NULL)
1818 OPENSSL_free(s->s3->tlsext_authz_client_types);
1819 s->s3->tlsext_authz_client_types =
1820 OPENSSL_malloc(server_authz_dataformatlist_length);
1821 if (!s->s3->tlsext_authz_client_types)
1823 *al = TLS1_AD_INTERNAL_ERROR;
1827 s->s3->tlsext_authz_client_types_len =
1828 server_authz_dataformatlist_length;
1829 memcpy(s->s3->tlsext_authz_client_types,
1831 server_authz_dataformatlist_length);
1833 /* Sort the types in order to check for duplicates. */
1834 qsort(s->s3->tlsext_authz_client_types,
1835 server_authz_dataformatlist_length,
1836 1 /* element size */,
1839 for (i = 0; i < server_authz_dataformatlist_length; i++)
1842 s->s3->tlsext_authz_client_types[i] ==
1843 s->s3->tlsext_authz_client_types[i-1])
1845 *al = TLS1_AD_DECODE_ERROR;
1859 /* Need RI if renegotiating */
1861 if (!renegotiate_seen && s->renegotiate &&
1862 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1864 *al = SSL_AD_HANDSHAKE_FAILURE;
1865 SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
1866 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1869 /* If no signature algorithms extension set default values */
1870 if (!s->cert->peer_sigalgs)
1871 ssl_cert_set_default_md(s->cert);
1876 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n)
1879 if (ssl_scan_clienthello_tlsext(s, p, d, n, &al) <= 0)
1881 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1885 if (ssl_check_clienthello_tlsext(s) <= 0)
1887 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,SSL_R_CLIENTHELLO_TLSEXT);
1893 #ifndef OPENSSL_NO_NEXTPROTONEG
1894 /* ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1895 * elements of zero length are allowed and the set of elements must exactly fill
1896 * the length of the block. */
1897 static char ssl_next_proto_validate(unsigned char *d, unsigned len)
1899 unsigned int off = 0;
1913 static int ssl_scan_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1915 unsigned short length;
1916 unsigned short type;
1917 unsigned short size;
1918 unsigned char *data = *p;
1919 int tlsext_servername = 0;
1920 int renegotiate_seen = 0;
1922 #ifndef OPENSSL_NO_NEXTPROTONEG
1923 s->s3->next_proto_neg_seen = 0;
1926 #ifndef OPENSSL_NO_HEARTBEATS
1927 s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
1928 SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
1931 if (data >= (d+n-2))
1935 if (data+length != d+n)
1937 *al = SSL_AD_DECODE_ERROR;
1941 while(data <= (d+n-4))
1946 if (data+size > (d+n))
1949 if (s->tlsext_debug_cb)
1950 s->tlsext_debug_cb(s, 1, type, data, size,
1951 s->tlsext_debug_arg);
1953 if (type == TLSEXT_TYPE_server_name)
1955 if (s->tlsext_hostname == NULL || size > 0)
1957 *al = TLS1_AD_UNRECOGNIZED_NAME;
1960 tlsext_servername = 1;
1963 #ifndef OPENSSL_NO_EC
1964 else if (type == TLSEXT_TYPE_ec_point_formats &&
1965 s->version != DTLS1_VERSION)
1967 unsigned char *sdata = data;
1968 int ecpointformatlist_length = *(sdata++);
1970 if (ecpointformatlist_length != size - 1)
1972 *al = TLS1_AD_DECODE_ERROR;
1975 s->session->tlsext_ecpointformatlist_length = 0;
1976 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1977 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1979 *al = TLS1_AD_INTERNAL_ERROR;
1982 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1983 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1985 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1986 sdata = s->session->tlsext_ecpointformatlist;
1987 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1988 fprintf(stderr,"%i ",*(sdata++));
1989 fprintf(stderr,"\n");
1992 #endif /* OPENSSL_NO_EC */
1994 else if (type == TLSEXT_TYPE_session_ticket)
1996 if (s->tls_session_ticket_ext_cb &&
1997 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1999 *al = TLS1_AD_INTERNAL_ERROR;
2002 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
2005 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2008 s->tlsext_ticket_expected = 1;
2010 #ifdef TLSEXT_TYPE_opaque_prf_input
2011 else if (type == TLSEXT_TYPE_opaque_prf_input &&
2012 s->version != DTLS1_VERSION)
2014 unsigned char *sdata = data;
2018 *al = SSL_AD_DECODE_ERROR;
2021 n2s(sdata, s->s3->server_opaque_prf_input_len);
2022 if (s->s3->server_opaque_prf_input_len != size - 2)
2024 *al = SSL_AD_DECODE_ERROR;
2028 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
2029 OPENSSL_free(s->s3->server_opaque_prf_input);
2030 if (s->s3->server_opaque_prf_input_len == 0)
2031 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
2033 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
2035 if (s->s3->server_opaque_prf_input == NULL)
2037 *al = TLS1_AD_INTERNAL_ERROR;
2042 else if (type == TLSEXT_TYPE_status_request &&
2043 s->version != DTLS1_VERSION)
2045 /* MUST be empty and only sent if we've requested
2046 * a status request message.
2048 if ((s->tlsext_status_type == -1) || (size > 0))
2050 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2053 /* Set flag to expect CertificateStatus message */
2054 s->tlsext_status_expected = 1;
2056 #ifndef OPENSSL_NO_NEXTPROTONEG
2057 else if (type == TLSEXT_TYPE_next_proto_neg &&
2058 s->s3->tmp.finish_md_len == 0)
2060 unsigned char *selected;
2061 unsigned char selected_len;
2063 /* We must have requested it. */
2064 if ((s->ctx->next_proto_select_cb == NULL))
2066 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2069 /* The data must be valid */
2070 if (!ssl_next_proto_validate(data, size))
2072 *al = TLS1_AD_DECODE_ERROR;
2075 if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, data, size, s->ctx->next_proto_select_cb_arg) != SSL_TLSEXT_ERR_OK)
2077 *al = TLS1_AD_INTERNAL_ERROR;
2080 s->next_proto_negotiated = OPENSSL_malloc(selected_len);
2081 if (!s->next_proto_negotiated)
2083 *al = TLS1_AD_INTERNAL_ERROR;
2086 memcpy(s->next_proto_negotiated, selected, selected_len);
2087 s->next_proto_negotiated_len = selected_len;
2088 s->s3->next_proto_neg_seen = 1;
2091 else if (type == TLSEXT_TYPE_renegotiate)
2093 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
2095 renegotiate_seen = 1;
2097 #ifndef OPENSSL_NO_HEARTBEATS
2098 else if (type == TLSEXT_TYPE_heartbeat)
2102 case 0x01: /* Server allows us to send HB requests */
2103 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
2105 case 0x02: /* Server doesn't accept HB requests */
2106 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
2107 s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
2109 default: *al = SSL_AD_ILLEGAL_PARAMETER;
2114 else if (type == TLSEXT_TYPE_use_srtp)
2116 if(ssl_parse_serverhello_use_srtp_ext(s, data, size,
2121 else if (type == TLSEXT_TYPE_server_authz)
2123 /* We only support audit proofs. It's an error to send
2124 * an authz hello extension if the client
2125 * didn't request a proof. */
2126 unsigned char *sdata = data;
2127 unsigned char server_authz_dataformatlist_length;
2129 if (!s->ctx->tlsext_authz_server_audit_proof_cb)
2131 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2137 *al = TLS1_AD_DECODE_ERROR;
2141 server_authz_dataformatlist_length = *(sdata++);
2142 if (server_authz_dataformatlist_length != size - 1)
2144 *al = TLS1_AD_DECODE_ERROR;
2148 /* We only support audit proofs, so a legal ServerHello
2149 * authz list contains exactly one entry. */
2150 if (server_authz_dataformatlist_length != 1 ||
2151 sdata[0] != TLSEXT_AUTHZDATAFORMAT_audit_proof)
2153 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2157 s->s3->tlsext_authz_server_promised = 1;
2165 *al = SSL_AD_DECODE_ERROR;
2169 if (!s->hit && tlsext_servername == 1)
2171 if (s->tlsext_hostname)
2173 if (s->session->tlsext_hostname == NULL)
2175 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
2176 if (!s->session->tlsext_hostname)
2178 *al = SSL_AD_UNRECOGNIZED_NAME;
2184 *al = SSL_AD_DECODE_ERROR;
2194 /* Determine if we need to see RI. Strictly speaking if we want to
2195 * avoid an attack we should *always* see RI even on initial server
2196 * hello because the client doesn't see any renegotiation during an
2197 * attack. However this would mean we could not connect to any server
2198 * which doesn't support RI so for the immediate future tolerate RI
2199 * absence on initial connect only.
2201 if (!renegotiate_seen
2202 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
2203 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
2205 *al = SSL_AD_HANDSHAKE_FAILURE;
2206 SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT,
2207 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
2215 int ssl_prepare_clienthello_tlsext(SSL *s)
2218 #ifdef TLSEXT_TYPE_opaque_prf_input
2222 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
2224 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
2229 if (s->tlsext_opaque_prf_input != NULL)
2231 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
2232 OPENSSL_free(s->s3->client_opaque_prf_input);
2234 if (s->tlsext_opaque_prf_input_len == 0)
2235 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
2237 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
2238 if (s->s3->client_opaque_prf_input == NULL)
2240 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
2243 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
2247 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
2248 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
2255 int ssl_prepare_serverhello_tlsext(SSL *s)
2257 #ifndef OPENSSL_NO_EC
2258 /* If we are server and using an ECC cipher suite, send the point formats we support
2259 * if the client sent us an ECPointsFormat extension. Note that the server is not
2260 * supposed to send an EllipticCurves extension.
2263 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2264 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2265 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
2266 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
2270 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
2271 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
2273 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
2276 s->tlsext_ecpointformatlist_length = 3;
2277 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
2278 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
2279 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
2281 #endif /* OPENSSL_NO_EC */
2286 static int ssl_check_clienthello_tlsext(SSL *s)
2288 int ret=SSL_TLSEXT_ERR_NOACK;
2289 int al = SSL_AD_UNRECOGNIZED_NAME;
2291 #ifndef OPENSSL_NO_EC
2292 /* The handling of the ECPointFormats extension is done elsewhere, namely in
2293 * ssl3_choose_cipher in s3_lib.c.
2295 /* The handling of the EllipticCurves extension is done elsewhere, namely in
2296 * ssl3_choose_cipher in s3_lib.c.
2300 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
2301 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
2302 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
2303 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
2305 /* If status request then ask callback what to do.
2306 * Note: this must be called after servername callbacks in case
2307 * the certificate has changed.
2309 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
2312 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2315 /* We don't want to send a status request response */
2316 case SSL_TLSEXT_ERR_NOACK:
2317 s->tlsext_status_expected = 0;
2319 /* status request response should be sent */
2320 case SSL_TLSEXT_ERR_OK:
2321 if (s->tlsext_ocsp_resp)
2322 s->tlsext_status_expected = 1;
2324 s->tlsext_status_expected = 0;
2326 /* something bad happened */
2327 case SSL_TLSEXT_ERR_ALERT_FATAL:
2328 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2329 al = SSL_AD_INTERNAL_ERROR;
2334 s->tlsext_status_expected = 0;
2336 #ifdef TLSEXT_TYPE_opaque_prf_input
2338 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
2339 * but we might be sending an alert in response to the client hello,
2340 * so this has to happen here in ssl_check_clienthello_tlsext(). */
2344 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
2346 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
2349 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2350 al = SSL_AD_INTERNAL_ERROR;
2355 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
2356 OPENSSL_free(s->s3->server_opaque_prf_input);
2357 s->s3->server_opaque_prf_input = NULL;
2359 if (s->tlsext_opaque_prf_input != NULL)
2361 if (s->s3->client_opaque_prf_input != NULL &&
2362 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
2364 /* can only use this extension if we have a server opaque PRF input
2365 * of the same length as the client opaque PRF input! */
2367 if (s->tlsext_opaque_prf_input_len == 0)
2368 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
2370 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
2371 if (s->s3->server_opaque_prf_input == NULL)
2373 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2374 al = SSL_AD_INTERNAL_ERROR;
2377 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
2381 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
2383 /* The callback wants to enforce use of the extension,
2384 * but we can't do that with the client opaque PRF input;
2385 * abort the handshake.
2387 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2388 al = SSL_AD_HANDSHAKE_FAILURE;
2396 case SSL_TLSEXT_ERR_ALERT_FATAL:
2397 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2400 case SSL_TLSEXT_ERR_ALERT_WARNING:
2401 ssl3_send_alert(s,SSL3_AL_WARNING,al);
2404 case SSL_TLSEXT_ERR_NOACK:
2405 s->servername_done=0;
2411 int ssl_check_serverhello_tlsext(SSL *s)
2413 int ret=SSL_TLSEXT_ERR_NOACK;
2414 int al = SSL_AD_UNRECOGNIZED_NAME;
2416 #ifndef OPENSSL_NO_EC
2417 /* If we are client and using an elliptic curve cryptography cipher
2418 * suite, then if server returns an EC point formats lists extension
2419 * it must contain uncompressed.
2421 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2422 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2423 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
2424 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
2425 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
2427 /* we are using an ECC cipher */
2429 unsigned char *list;
2430 int found_uncompressed = 0;
2431 list = s->session->tlsext_ecpointformatlist;
2432 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
2434 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
2436 found_uncompressed = 1;
2440 if (!found_uncompressed)
2442 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
2446 ret = SSL_TLSEXT_ERR_OK;
2447 #endif /* OPENSSL_NO_EC */
2449 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
2450 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
2451 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
2452 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
2454 #ifdef TLSEXT_TYPE_opaque_prf_input
2455 if (s->s3->server_opaque_prf_input_len > 0)
2457 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
2458 * So first verify that we really have a value from the server too. */
2460 if (s->s3->server_opaque_prf_input == NULL)
2462 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2463 al = SSL_AD_HANDSHAKE_FAILURE;
2466 /* Anytime the server *has* sent an opaque PRF input, we need to check
2467 * that we have a client opaque PRF input of the same size. */
2468 if (s->s3->client_opaque_prf_input == NULL ||
2469 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
2471 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2472 al = SSL_AD_ILLEGAL_PARAMETER;
2477 /* If we've requested certificate status and we wont get one
2480 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
2481 && s->ctx && s->ctx->tlsext_status_cb)
2484 /* Set resp to NULL, resplen to -1 so callback knows
2485 * there is no response.
2487 if (s->tlsext_ocsp_resp)
2489 OPENSSL_free(s->tlsext_ocsp_resp);
2490 s->tlsext_ocsp_resp = NULL;
2492 s->tlsext_ocsp_resplen = -1;
2493 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2496 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2497 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2501 al = SSL_AD_INTERNAL_ERROR;
2502 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2508 case SSL_TLSEXT_ERR_ALERT_FATAL:
2509 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2512 case SSL_TLSEXT_ERR_ALERT_WARNING:
2513 ssl3_send_alert(s,SSL3_AL_WARNING,al);
2516 case SSL_TLSEXT_ERR_NOACK:
2517 s->servername_done=0;
2523 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n)
2526 if (s->version < SSL3_VERSION)
2528 if (ssl_scan_serverhello_tlsext(s, p, d, n, &al) <= 0)
2530 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2534 if (ssl_check_serverhello_tlsext(s) <= 0)
2536 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,SSL_R_SERVERHELLO_TLSEXT);
2542 /* Since the server cache lookup is done early on in the processing of the
2543 * ClientHello, and other operations depend on the result, we need to handle
2544 * any TLS session ticket extension at the same time.
2546 * session_id: points at the session ID in the ClientHello. This code will
2547 * read past the end of this in order to parse out the session ticket
2548 * extension, if any.
2549 * len: the length of the session ID.
2550 * limit: a pointer to the first byte after the ClientHello.
2551 * ret: (output) on return, if a ticket was decrypted, then this is set to
2552 * point to the resulting session.
2554 * If s->tls_session_secret_cb is set then we are expecting a pre-shared key
2555 * ciphersuite, in which case we have no use for session tickets and one will
2556 * never be decrypted, nor will s->tlsext_ticket_expected be set to 1.
2559 * -1: fatal error, either from parsing or decrypting the ticket.
2560 * 0: no ticket was found (or was ignored, based on settings).
2561 * 1: a zero length extension was found, indicating that the client supports
2562 * session tickets but doesn't currently have one to offer.
2563 * 2: either s->tls_session_secret_cb was set, or a ticket was offered but
2564 * couldn't be decrypted because of a non-fatal error.
2565 * 3: a ticket was successfully decrypted and *ret was set.
2568 * Sets s->tlsext_ticket_expected to 1 if the server will have to issue
2569 * a new session ticket to the client because the client indicated support
2570 * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
2571 * a session ticket or we couldn't use the one it gave us, or if
2572 * s->ctx->tlsext_ticket_key_cb asked to renew the client's ticket.
2573 * Otherwise, s->tlsext_ticket_expected is set to 0.
2575 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
2576 const unsigned char *limit, SSL_SESSION **ret)
2578 /* Point after session ID in client hello */
2579 const unsigned char *p = session_id + len;
2583 s->tlsext_ticket_expected = 0;
2585 /* If tickets disabled behave as if no ticket present
2586 * to permit stateful resumption.
2588 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
2590 if ((s->version <= SSL3_VERSION) || !limit)
2594 /* Skip past DTLS cookie */
2595 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
2602 /* Skip past cipher list */
2607 /* Skip past compression algorithm list */
2612 /* Now at start of extensions */
2613 if ((p + 2) >= limit)
2616 while ((p + 4) <= limit)
2618 unsigned short type, size;
2621 if (p + size > limit)
2623 if (type == TLSEXT_TYPE_session_ticket)
2628 /* The client will accept a ticket but doesn't
2629 * currently have one. */
2630 s->tlsext_ticket_expected = 1;
2633 if (s->tls_session_secret_cb)
2635 /* Indicate that the ticket couldn't be
2636 * decrypted rather than generating the session
2637 * from ticket now, trigger abbreviated
2638 * handshake based on external mechanism to
2639 * calculate the master secret later. */
2642 r = tls_decrypt_ticket(s, p, size, session_id, len, ret);
2645 case 2: /* ticket couldn't be decrypted */
2646 s->tlsext_ticket_expected = 1;
2648 case 3: /* ticket was decrypted */
2650 case 4: /* ticket decrypted but need to renew */
2651 s->tlsext_ticket_expected = 1;
2653 default: /* fatal error */
2662 /* tls_decrypt_ticket attempts to decrypt a session ticket.
2664 * etick: points to the body of the session ticket extension.
2665 * eticklen: the length of the session tickets extenion.
2666 * sess_id: points at the session ID.
2667 * sesslen: the length of the session ID.
2668 * psess: (output) on return, if a ticket was decrypted, then this is set to
2669 * point to the resulting session.
2672 * -1: fatal error, either from parsing or decrypting the ticket.
2673 * 2: the ticket couldn't be decrypted.
2674 * 3: a ticket was successfully decrypted and *psess was set.
2675 * 4: same as 3, but the ticket needs to be renewed.
2677 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
2678 const unsigned char *sess_id, int sesslen,
2679 SSL_SESSION **psess)
2682 unsigned char *sdec;
2683 const unsigned char *p;
2684 int slen, mlen, renew_ticket = 0;
2685 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
2688 SSL_CTX *tctx = s->initial_ctx;
2689 /* Need at least keyname + iv + some encrypted data */
2692 /* Initialize session ticket encryption and HMAC contexts */
2693 HMAC_CTX_init(&hctx);
2694 EVP_CIPHER_CTX_init(&ctx);
2695 if (tctx->tlsext_ticket_key_cb)
2697 unsigned char *nctick = (unsigned char *)etick;
2698 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
2709 /* Check key name matches */
2710 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
2712 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
2713 tlsext_tick_md(), NULL);
2714 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
2715 tctx->tlsext_tick_aes_key, etick + 16);
2717 /* Attempt to process session ticket, first conduct sanity and
2718 * integrity checks on ticket.
2720 mlen = HMAC_size(&hctx);
2723 EVP_CIPHER_CTX_cleanup(&ctx);
2727 /* Check HMAC of encrypted ticket */
2728 HMAC_Update(&hctx, etick, eticklen);
2729 HMAC_Final(&hctx, tick_hmac, NULL);
2730 HMAC_CTX_cleanup(&hctx);
2731 if (memcmp(tick_hmac, etick + eticklen, mlen))
2733 /* Attempt to decrypt session data */
2734 /* Move p after IV to start of encrypted ticket, update length */
2735 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
2736 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
2737 sdec = OPENSSL_malloc(eticklen);
2740 EVP_CIPHER_CTX_cleanup(&ctx);
2743 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
2744 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
2747 EVP_CIPHER_CTX_cleanup(&ctx);
2750 sess = d2i_SSL_SESSION(NULL, &p, slen);
2754 /* The session ID, if non-empty, is used by some clients to
2755 * detect that the ticket has been accepted. So we copy it to
2756 * the session structure. If it is empty set length to zero
2757 * as required by standard.
2760 memcpy(sess->session_id, sess_id, sesslen);
2761 sess->session_id_length = sesslen;
2769 /* For session parse failure, indicate that we need to send a new
2774 /* Tables to translate from NIDs to TLS v1.2 ids */
2782 static tls12_lookup tls12_md[] = {
2783 {NID_md5, TLSEXT_hash_md5},
2784 {NID_sha1, TLSEXT_hash_sha1},
2785 {NID_sha224, TLSEXT_hash_sha224},
2786 {NID_sha256, TLSEXT_hash_sha256},
2787 {NID_sha384, TLSEXT_hash_sha384},
2788 {NID_sha512, TLSEXT_hash_sha512}
2791 static tls12_lookup tls12_sig[] = {
2792 {EVP_PKEY_RSA, TLSEXT_signature_rsa},
2793 {EVP_PKEY_DSA, TLSEXT_signature_dsa},
2794 {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
2797 static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
2800 for (i = 0; i < tlen; i++)
2802 if (table[i].nid == nid)
2808 static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen)
2811 for (i = 0; i < tlen; i++)
2813 if ((table[i].id) == id)
2814 return table[i].nid;
2819 int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
2824 md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
2825 sizeof(tls12_md)/sizeof(tls12_lookup));
2828 sig_id = tls12_get_sigid(pk);
2831 p[0] = (unsigned char)md_id;
2832 p[1] = (unsigned char)sig_id;
2836 int tls12_get_sigid(const EVP_PKEY *pk)
2838 return tls12_find_id(pk->type, tls12_sig,
2839 sizeof(tls12_sig)/sizeof(tls12_lookup));
2842 const EVP_MD *tls12_get_hash(unsigned char hash_alg)
2846 #ifndef OPENSSL_NO_MD5
2847 case TLSEXT_hash_md5:
2854 #ifndef OPENSSL_NO_SHA
2855 case TLSEXT_hash_sha1:
2858 #ifndef OPENSSL_NO_SHA256
2859 case TLSEXT_hash_sha224:
2860 return EVP_sha224();
2862 case TLSEXT_hash_sha256:
2863 return EVP_sha256();
2865 #ifndef OPENSSL_NO_SHA512
2866 case TLSEXT_hash_sha384:
2867 return EVP_sha384();
2869 case TLSEXT_hash_sha512:
2870 return EVP_sha512();
2878 static int tls12_get_pkey_idx(unsigned char sig_alg)
2882 #ifndef OPENSSL_NO_RSA
2883 case TLSEXT_signature_rsa:
2884 return SSL_PKEY_RSA_SIGN;
2886 #ifndef OPENSSL_NO_DSA
2887 case TLSEXT_signature_dsa:
2888 return SSL_PKEY_DSA_SIGN;
2890 #ifndef OPENSSL_NO_ECDSA
2891 case TLSEXT_signature_ecdsa:
2892 return SSL_PKEY_ECC;
2898 /* Convert TLS 1.2 signature algorithm extension values into NIDs */
2899 static void tls1_lookup_sigalg(int *phash_nid, int *psign_nid,
2900 int *psignhash_nid, const unsigned char *data)
2902 int sign_nid, hash_nid;
2903 if (!phash_nid && !psign_nid && !psignhash_nid)
2905 if (phash_nid || psignhash_nid)
2907 hash_nid = tls12_find_nid(data[0], tls12_md,
2908 sizeof(tls12_md)/sizeof(tls12_lookup));
2910 *phash_nid = hash_nid;
2912 if (psign_nid || psignhash_nid)
2914 sign_nid = tls12_find_nid(data[1], tls12_sig,
2915 sizeof(tls12_sig)/sizeof(tls12_lookup));
2917 *psign_nid = sign_nid;
2921 if (sign_nid && hash_nid)
2922 OBJ_find_sigid_by_algs(psignhash_nid,
2923 hash_nid, sign_nid);
2925 *psignhash_nid = NID_undef;
2928 /* Given preference and allowed sigalgs set shared sigalgs */
2929 static int tls12_do_shared_sigalgs(TLS_SIGALGS *shsig,
2930 const unsigned char *pref, size_t preflen,
2931 const unsigned char *allow, size_t allowlen)
2933 const unsigned char *ptmp, *atmp;
2934 size_t i, j, nmatch = 0;
2935 for (i = 0, ptmp = pref; i < preflen; i+=2, ptmp+=2)
2937 /* Skip disabled hashes or signature algorithms */
2938 if (tls12_get_hash(ptmp[0]) == NULL)
2940 if (tls12_get_pkey_idx(ptmp[1]) == -1)
2942 for (j = 0, atmp = allow; j < allowlen; j+=2, atmp+=2)
2944 if (ptmp[0] == atmp[0] && ptmp[1] == atmp[1])
2949 shsig->rhash = ptmp[0];
2950 shsig->rsign = ptmp[1];
2951 tls1_lookup_sigalg(&shsig->hash_nid,
2953 &shsig->signandhash_nid,
2964 /* Set shared signature algorithms for SSL structures */
2965 static int tls1_set_shared_sigalgs(SSL *s)
2967 const unsigned char *pref, *allow, *conf;
2968 size_t preflen, allowlen, conflen;
2970 TLS_SIGALGS *salgs = NULL;
2972 conf = c->conf_sigalgs;
2974 conflen = c->conf_sigalgslen;
2977 conf = tls12_sigalgs;
2978 conflen = sizeof(tls12_sigalgs);
2984 if(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
2988 allow = c->peer_sigalgs;
2989 allowlen = c->peer_sigalgslen;
2995 pref = c->peer_sigalgs;
2996 preflen = c->peer_sigalgslen;
2998 nmatch = tls12_do_shared_sigalgs(NULL, pref, preflen, allow, allowlen);
3001 salgs = OPENSSL_malloc(nmatch * sizeof(TLS_SIGALGS));
3004 nmatch = tls12_do_shared_sigalgs(salgs, pref, preflen, allow, allowlen);
3005 c->shared_sigalgs = salgs;
3006 c->shared_sigalgslen = nmatch;
3011 /* Set preferred digest for each key type */
3013 int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
3019 TLS_SIGALGS *sigptr;
3020 /* Extension ignored for TLS versions below 1.2 */
3021 if (TLS1_get_version(s) < TLS1_2_VERSION)
3023 /* Should never happen */
3027 c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL;
3028 c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL;
3029 c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
3030 c->pkeys[SSL_PKEY_ECC].digest = NULL;
3032 c->peer_sigalgs = OPENSSL_malloc(dsize);
3033 if (!c->peer_sigalgs)
3035 c->peer_sigalgslen = dsize;
3036 memcpy(c->peer_sigalgs, data, dsize);
3038 tls1_set_shared_sigalgs(s);
3040 for (i = 0, sigptr = c->shared_sigalgs;
3041 i < c->shared_sigalgslen; i++, sigptr++)
3043 idx = tls12_get_pkey_idx(sigptr->rsign);
3044 if (idx > 0 && c->pkeys[idx].digest == NULL)
3046 md = tls12_get_hash(sigptr->rhash);
3047 c->pkeys[idx].digest = md;
3048 if (idx == SSL_PKEY_RSA_SIGN)
3049 c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
3053 /* Set any remaining keys to default values. NOTE: if alg is not
3054 * supported it stays as NULL.
3056 #ifndef OPENSSL_NO_DSA
3057 if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
3058 c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_dss1();
3060 #ifndef OPENSSL_NO_RSA
3061 if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
3063 c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
3064 c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
3067 #ifndef OPENSSL_NO_ECDSA
3068 if (!c->pkeys[SSL_PKEY_ECC].digest)
3069 c->pkeys[SSL_PKEY_ECC].digest = EVP_ecdsa();
3075 int SSL_get_sigalgs(SSL *s, int idx,
3076 int *psign, int *phash, int *psignhash,
3077 unsigned char *rsig, unsigned char *rhash)
3079 const unsigned char *psig = s->cert->peer_sigalgs;
3085 if (idx >= (int)s->cert->peer_sigalgslen)
3092 tls1_lookup_sigalg(phash, psign, psignhash, psig);
3094 return s->cert->peer_sigalgslen / 2;
3097 int SSL_get_shared_sigalgs(SSL *s, int idx,
3098 int *psign, int *phash, int *psignhash,
3099 unsigned char *rsig, unsigned char *rhash)
3101 TLS_SIGALGS *shsigalgs = s->cert->shared_sigalgs;
3102 if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen)
3106 *phash = shsigalgs->hash_nid;
3108 *psign = shsigalgs->sign_nid;
3110 *psignhash = shsigalgs->signandhash_nid;
3112 *rsig = shsigalgs->rsign;
3114 *rhash = shsigalgs->rhash;
3115 return s->cert->shared_sigalgslen;
3119 #ifndef OPENSSL_NO_HEARTBEATS
3121 tls1_process_heartbeat(SSL *s)
3123 unsigned char *p = &s->s3->rrec.data[0], *pl;
3124 unsigned short hbtype;
3125 unsigned int payload;
3126 unsigned int padding = 16; /* Use minimum padding */
3128 /* Read type and payload length first */
3133 if (s->msg_callback)
3134 s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT,
3135 &s->s3->rrec.data[0], s->s3->rrec.length,
3136 s, s->msg_callback_arg);
3138 if (hbtype == TLS1_HB_REQUEST)
3140 unsigned char *buffer, *bp;
3143 /* Allocate memory for the response, size is 1 bytes
3144 * message type, plus 2 bytes payload length, plus
3145 * payload, plus padding
3147 buffer = OPENSSL_malloc(1 + 2 + payload + padding);
3150 /* Enter response type, length and copy payload */
3151 *bp++ = TLS1_HB_RESPONSE;
3153 memcpy(bp, pl, payload);
3155 /* Random padding */
3156 RAND_pseudo_bytes(bp, padding);
3158 r = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buffer, 3 + payload + padding);
3160 if (r >= 0 && s->msg_callback)
3161 s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
3162 buffer, 3 + payload + padding,
3163 s, s->msg_callback_arg);
3165 OPENSSL_free(buffer);
3170 else if (hbtype == TLS1_HB_RESPONSE)
3174 /* We only send sequence numbers (2 bytes unsigned int),
3175 * and 16 random bytes, so we just try to read the
3176 * sequence number */
3179 if (payload == 18 && seq == s->tlsext_hb_seq)
3182 s->tlsext_hb_pending = 0;
3190 tls1_heartbeat(SSL *s)
3192 unsigned char *buf, *p;
3194 unsigned int payload = 18; /* Sequence number + random bytes */
3195 unsigned int padding = 16; /* Use minimum padding */
3197 /* Only send if peer supports and accepts HB requests... */
3198 if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) ||
3199 s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS)
3201 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
3205 /* ...and there is none in flight yet... */
3206 if (s->tlsext_hb_pending)
3208 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PENDING);
3212 /* ...and no handshake in progress. */
3213 if (SSL_in_init(s) || s->in_handshake)
3215 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_UNEXPECTED_MESSAGE);
3219 /* Check if padding is too long, payload and padding
3220 * must not exceed 2^14 - 3 = 16381 bytes in total.
3222 OPENSSL_assert(payload + padding <= 16381);
3224 /* Create HeartBeat message, we just use a sequence number
3225 * as payload to distuingish different messages and add
3226 * some random stuff.
3227 * - Message Type, 1 byte
3228 * - Payload Length, 2 bytes (unsigned int)
3229 * - Payload, the sequence number (2 bytes uint)
3230 * - Payload, random bytes (16 bytes uint)
3233 buf = OPENSSL_malloc(1 + 2 + payload + padding);
3236 *p++ = TLS1_HB_REQUEST;
3237 /* Payload length (18 bytes here) */
3239 /* Sequence number */
3240 s2n(s->tlsext_hb_seq, p);
3241 /* 16 random bytes */
3242 RAND_pseudo_bytes(p, 16);
3244 /* Random padding */
3245 RAND_pseudo_bytes(p, padding);
3247 ret = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding);
3250 if (s->msg_callback)
3251 s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
3252 buf, 3 + payload + padding,
3253 s, s->msg_callback_arg);
3255 s->tlsext_hb_pending = 1;
3264 #define MAX_SIGALGLEN (TLSEXT_hash_num * TLSEXT_signature_num * 2)
3269 int sigalgs[MAX_SIGALGLEN];
3272 static int sig_cb(const char *elem, int len, void *arg)
3274 sig_cb_st *sarg = arg;
3277 int sig_alg, hash_alg;
3278 if (sarg->sigalgcnt == MAX_SIGALGLEN)
3280 if (len > (int)(sizeof(etmp) - 1))
3282 memcpy(etmp, elem, len);
3284 p = strchr(etmp, '+');
3292 if (!strcmp(etmp, "RSA"))
3293 sig_alg = EVP_PKEY_RSA;
3294 else if (!strcmp(etmp, "DSA"))
3295 sig_alg = EVP_PKEY_DSA;
3296 else if (!strcmp(etmp, "ECDSA"))
3297 sig_alg = EVP_PKEY_EC;
3300 hash_alg = OBJ_sn2nid(p);
3301 if (hash_alg == NID_undef)
3302 hash_alg = OBJ_ln2nid(p);
3303 if (hash_alg == NID_undef)
3306 for (i = 0; i < sarg->sigalgcnt; i+=2)
3308 if (sarg->sigalgs[i] == sig_alg
3309 && sarg->sigalgs[i + 1] == hash_alg)
3312 sarg->sigalgs[sarg->sigalgcnt++] = hash_alg;
3313 sarg->sigalgs[sarg->sigalgcnt++] = sig_alg;
3317 /* Set suppored signature algorithms based on a colon separated list
3318 * of the form sig+hash e.g. RSA+SHA512:DSA+SHA512 */
3319 int tls1_set_sigalgs_list(CERT *c, const char *str)
3323 if (!CONF_parse_list(str, ':', 1, sig_cb, &sig))
3325 return tls1_set_sigalgs(c, sig.sigalgs, sig.sigalgcnt);
3328 int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen)
3330 unsigned char *sigalgs, *sptr;
3335 sigalgs = OPENSSL_malloc(salglen);
3336 if (sigalgs == NULL)
3338 for (i = 0, sptr = sigalgs; i < salglen; i+=2)
3340 rhash = tls12_find_id(*psig_nids++, tls12_md,
3341 sizeof(tls12_md)/sizeof(tls12_lookup));
3342 rsign = tls12_find_id(*psig_nids++, tls12_sig,
3343 sizeof(tls12_sig)/sizeof(tls12_lookup));
3345 if (rhash == -1 || rsign == -1)
3351 if (c->conf_sigalgs)
3352 OPENSSL_free(c->conf_sigalgs);
3354 c->conf_sigalgs = sigalgs;
3355 c->conf_sigalgslen = salglen;
3359 OPENSSL_free(sigalgs);