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])
543 /* Check cert parameters compatible with extensions: currently just checks
544 * EC certificates have compatible curves and compression.
546 static int tls1_check_cert_param(SSL *s, X509 *x)
548 unsigned char comp_id, curve_id[2];
551 pkey = X509_get_pubkey(x);
554 /* If not EC nothing to do */
555 if (pkey->type != EVP_PKEY_EC)
560 rv = tls1_set_ec_id(curve_id, &comp_id, pkey->pkey.ec);
564 return tls1_check_ec_key(s, curve_id, &comp_id);
566 /* Check EC temporary key is compatible with client extensions */
567 int tls1_check_ec_tmp_key(SSL *s)
569 unsigned char curve_id[2];
570 EC_KEY *ec = s->cert->ecdh_tmp;
571 if (s->cert->ecdh_tmp_auto)
573 /* Need a shared curve */
574 if (tls1_shared_curve(s, 0))
580 if (s->cert->ecdh_tmp_cb)
585 if (!tls1_set_ec_id(curve_id, NULL, ec))
587 return tls1_check_ec_key(s, curve_id, NULL);
590 #endif /* OPENSSL_NO_EC */
592 #ifndef OPENSSL_NO_TLSEXT
594 /* List of supported signature algorithms and hashes. Should make this
595 * customisable at some point, for now include everything we support.
598 #ifdef OPENSSL_NO_RSA
599 #define tlsext_sigalg_rsa(md) /* */
601 #define tlsext_sigalg_rsa(md) md, TLSEXT_signature_rsa,
604 #ifdef OPENSSL_NO_DSA
605 #define tlsext_sigalg_dsa(md) /* */
607 #define tlsext_sigalg_dsa(md) md, TLSEXT_signature_dsa,
610 #ifdef OPENSSL_NO_ECDSA
611 #define tlsext_sigalg_ecdsa(md) /* */
613 #define tlsext_sigalg_ecdsa(md) md, TLSEXT_signature_ecdsa,
616 #define tlsext_sigalg(md) \
617 tlsext_sigalg_rsa(md) \
618 tlsext_sigalg_dsa(md) \
619 tlsext_sigalg_ecdsa(md)
621 static unsigned char tls12_sigalgs[] = {
622 #ifndef OPENSSL_NO_SHA512
623 tlsext_sigalg(TLSEXT_hash_sha512)
624 tlsext_sigalg(TLSEXT_hash_sha384)
626 #ifndef OPENSSL_NO_SHA256
627 tlsext_sigalg(TLSEXT_hash_sha256)
628 tlsext_sigalg(TLSEXT_hash_sha224)
630 #ifndef OPENSSL_NO_SHA
631 tlsext_sigalg(TLSEXT_hash_sha1)
633 #ifndef OPENSSL_NO_MD5
634 tlsext_sigalg_rsa(TLSEXT_hash_md5)
638 size_t tls12_get_sig_algs(SSL *s, unsigned char *p)
640 const unsigned char *sigs;
642 sigs = s->cert->conf_sigalgs;
645 sigslen = s->cert->conf_sigalgslen;
648 sigs = tls12_sigalgs;
649 sigslen = sizeof(tls12_sigalgs);
651 /* If FIPS mode don't include MD5 which is last */
658 memcpy(p, sigs, sigslen);
662 /* byte_compare is a compare function for qsort(3) that compares bytes. */
663 static int byte_compare(const void *in_a, const void *in_b)
665 unsigned char a = *((const unsigned char*) in_a);
666 unsigned char b = *((const unsigned char*) in_b);
675 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
678 unsigned char *ret = p;
679 #ifndef OPENSSL_NO_EC
680 /* See if we support any ECC ciphersuites */
682 if (s->version != DTLS1_VERSION && s->version >= TLS1_VERSION)
685 unsigned long alg_k, alg_a;
686 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
688 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
690 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
692 alg_k = c->algorithm_mkey;
693 alg_a = c->algorithm_auth;
694 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)
695 || (alg_a & SSL_aECDSA)))
704 /* don't add extensions for SSLv3 unless doing secure renegotiation */
705 if (s->client_version == SSL3_VERSION
706 && !s->s3->send_connection_binding)
711 if (ret>=limit) return NULL; /* this really never occurs, but ... */
713 if (s->tlsext_hostname != NULL)
715 /* Add TLS extension servername to the Client Hello message */
716 unsigned long size_str;
719 /* check for enough space.
720 4 for the servername type and entension length
721 2 for servernamelist length
722 1 for the hostname type
723 2 for hostname length
727 if ((lenmax = limit - ret - 9) < 0
728 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
731 /* extension type and length */
732 s2n(TLSEXT_TYPE_server_name,ret);
735 /* length of servername list */
738 /* hostname type, length and hostname */
739 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
741 memcpy(ret, s->tlsext_hostname, size_str);
745 /* Add RI if renegotiating */
750 if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
752 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
756 if((limit - p - 4 - el) < 0) return NULL;
758 s2n(TLSEXT_TYPE_renegotiate,ret);
761 if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
763 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
770 #ifndef OPENSSL_NO_SRP
771 /* Add SRP username if there is one */
772 if (s->srp_ctx.login != NULL)
773 { /* Add TLS extension SRP username to the Client Hello message */
775 int login_len = strlen(s->srp_ctx.login);
776 if (login_len > 255 || login_len == 0)
778 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
782 /* check for enough space.
783 4 for the srp type type and entension length
784 1 for the srp user identity
785 + srp user identity length
787 if ((limit - ret - 5 - login_len) < 0) return NULL;
789 /* fill in the extension */
790 s2n(TLSEXT_TYPE_srp,ret);
791 s2n(login_len+1,ret);
792 (*ret++) = (unsigned char) login_len;
793 memcpy(ret, s->srp_ctx.login, login_len);
798 #ifndef OPENSSL_NO_EC
801 /* Add TLS extension ECPointFormats to the ClientHello message */
803 const unsigned char *plist;
805 /* If we have a custom point format list use it otherwise
807 plist = s->tlsext_ecpointformatlist;
809 plistlen = s->tlsext_ecpointformatlist_length;
812 plist = ecformats_default;
813 plistlen = sizeof(ecformats_default);
816 if ((lenmax = limit - ret - 5) < 0) return NULL;
817 if (plistlen > (size_t)lenmax) return NULL;
820 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
824 s2n(TLSEXT_TYPE_ec_point_formats,ret);
825 s2n(plistlen + 1,ret);
826 *(ret++) = (unsigned char)plistlen ;
827 memcpy(ret, plist, plistlen);
830 /* Add TLS extension EllipticCurves to the ClientHello message */
831 plist = s->tlsext_ellipticcurvelist;
832 tls1_get_curvelist(s, 0, &plist, &plistlen);
834 if ((lenmax = limit - ret - 6) < 0) return NULL;
835 if (plistlen > (size_t)lenmax) return NULL;
836 if (plistlen > 65532)
838 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
842 s2n(TLSEXT_TYPE_elliptic_curves,ret);
843 s2n(plistlen + 2, ret);
845 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
846 * elliptic_curve_list, but the examples use two bytes.
847 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
848 * resolves this to two bytes.
851 memcpy(ret, plist, plistlen);
854 #endif /* OPENSSL_NO_EC */
856 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
859 if (!s->new_session && s->session && s->session->tlsext_tick)
860 ticklen = s->session->tlsext_ticklen;
861 else if (s->session && s->tlsext_session_ticket &&
862 s->tlsext_session_ticket->data)
864 ticklen = s->tlsext_session_ticket->length;
865 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
866 if (!s->session->tlsext_tick)
868 memcpy(s->session->tlsext_tick,
869 s->tlsext_session_ticket->data,
871 s->session->tlsext_ticklen = ticklen;
875 if (ticklen == 0 && s->tlsext_session_ticket &&
876 s->tlsext_session_ticket->data == NULL)
878 /* Check for enough room 2 for extension type, 2 for len
881 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
882 s2n(TLSEXT_TYPE_session_ticket,ret);
886 memcpy(ret, s->session->tlsext_tick, ticklen);
892 if (TLS1_get_client_version(s) >= TLS1_2_VERSION)
895 salglen = tls12_get_sig_algs(s, NULL);
896 if ((size_t)(limit - ret) < salglen + 6)
898 s2n(TLSEXT_TYPE_signature_algorithms,ret);
899 s2n(salglen + 2, ret);
901 tls12_get_sig_algs(s, ret);
905 #ifdef TLSEXT_TYPE_opaque_prf_input
906 if (s->s3->client_opaque_prf_input != NULL &&
907 s->version != DTLS1_VERSION)
909 size_t col = s->s3->client_opaque_prf_input_len;
911 if ((long)(limit - ret - 6 - col < 0))
913 if (col > 0xFFFD) /* can't happen */
916 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
919 memcpy(ret, s->s3->client_opaque_prf_input, col);
924 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
925 s->version != DTLS1_VERSION)
928 long extlen, idlen, itmp;
932 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
934 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
935 itmp = i2d_OCSP_RESPID(id, NULL);
941 if (s->tlsext_ocsp_exts)
943 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
950 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
951 s2n(TLSEXT_TYPE_status_request, ret);
952 if (extlen + idlen > 0xFFF0)
954 s2n(extlen + idlen + 5, ret);
955 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
957 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
959 /* save position of id len */
960 unsigned char *q = ret;
961 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
962 /* skip over id len */
964 itmp = i2d_OCSP_RESPID(id, &ret);
970 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
973 #ifndef OPENSSL_NO_HEARTBEATS
974 /* Add Heartbeat extension */
975 s2n(TLSEXT_TYPE_heartbeat,ret);
978 * 1: peer may send requests
979 * 2: peer not allowed to send requests
981 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
982 *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
984 *(ret++) = SSL_TLSEXT_HB_ENABLED;
987 #ifndef OPENSSL_NO_NEXTPROTONEG
988 if (s->ctx->next_proto_select_cb && !s->s3->tmp.finish_md_len)
990 /* The client advertises an emtpy extension to indicate its
991 * support for Next Protocol Negotiation */
992 if (limit - ret - 4 < 0)
994 s2n(TLSEXT_TYPE_next_proto_neg,ret);
999 if(SSL_get_srtp_profiles(s))
1003 ssl_add_clienthello_use_srtp_ext(s, 0, &el, 0);
1005 if((limit - p - 4 - el) < 0) return NULL;
1007 s2n(TLSEXT_TYPE_use_srtp,ret);
1010 if(ssl_add_clienthello_use_srtp_ext(s, ret, &el, el))
1012 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1018 /* Add TLS extension Server_Authz_DataFormats to the ClientHello */
1019 /* 2 bytes for extension type */
1020 /* 2 bytes for extension length */
1021 /* 1 byte for the list length */
1022 /* 1 byte for the list (we only support audit proofs) */
1023 if (s->ctx->tlsext_authz_server_audit_proof_cb != NULL)
1026 const unsigned short ext_len = 2;
1027 const unsigned char list_len = 1;
1029 if ((lenmax = limit - ret - 6) < 0) return NULL;
1031 s2n(TLSEXT_TYPE_server_authz, ret);
1032 /* Extension length: 2 bytes */
1034 *(ret++) = list_len;
1035 *(ret++) = TLSEXT_AUTHZDATAFORMAT_audit_proof;
1038 if ((extdatalen = ret-p-2) == 0)
1045 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
1048 unsigned char *ret = p;
1049 #ifndef OPENSSL_NO_NEXTPROTONEG
1050 int next_proto_neg_seen;
1053 /* don't add extensions for SSLv3, unless doing secure renegotiation */
1054 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
1058 if (ret>=limit) return NULL; /* this really never occurs, but ... */
1060 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
1062 if ((long)(limit - ret - 4) < 0) return NULL;
1064 s2n(TLSEXT_TYPE_server_name,ret);
1068 if(s->s3->send_connection_binding)
1072 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
1074 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1078 if((limit - p - 4 - el) < 0) return NULL;
1080 s2n(TLSEXT_TYPE_renegotiate,ret);
1083 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
1085 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1092 #ifndef OPENSSL_NO_EC
1093 if (s->tlsext_ecpointformatlist != NULL &&
1094 s->version != DTLS1_VERSION)
1096 /* Add TLS extension ECPointFormats to the ServerHello message */
1099 if ((lenmax = limit - ret - 5) < 0) return NULL;
1100 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
1101 if (s->tlsext_ecpointformatlist_length > 255)
1103 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1107 s2n(TLSEXT_TYPE_ec_point_formats,ret);
1108 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
1109 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
1110 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
1111 ret+=s->tlsext_ecpointformatlist_length;
1114 /* Currently the server should not respond with a SupportedCurves extension */
1115 #endif /* OPENSSL_NO_EC */
1117 if (s->tlsext_ticket_expected
1118 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
1120 if ((long)(limit - ret - 4) < 0) return NULL;
1121 s2n(TLSEXT_TYPE_session_ticket,ret);
1125 if (s->tlsext_status_expected)
1127 if ((long)(limit - ret - 4) < 0) return NULL;
1128 s2n(TLSEXT_TYPE_status_request,ret);
1132 #ifdef TLSEXT_TYPE_opaque_prf_input
1133 if (s->s3->server_opaque_prf_input != NULL &&
1134 s->version != DTLS1_VERSION)
1136 size_t sol = s->s3->server_opaque_prf_input_len;
1138 if ((long)(limit - ret - 6 - sol) < 0)
1140 if (sol > 0xFFFD) /* can't happen */
1143 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
1146 memcpy(ret, s->s3->server_opaque_prf_input, sol);
1155 ssl_add_serverhello_use_srtp_ext(s, 0, &el, 0);
1157 if((limit - p - 4 - el) < 0) return NULL;
1159 s2n(TLSEXT_TYPE_use_srtp,ret);
1162 if(ssl_add_serverhello_use_srtp_ext(s, ret, &el, el))
1164 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
1170 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
1171 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
1172 { const unsigned char cryptopro_ext[36] = {
1173 0xfd, 0xe8, /*65000*/
1174 0x00, 0x20, /*32 bytes length*/
1175 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
1176 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
1177 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
1178 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
1179 if (limit-ret<36) return NULL;
1180 memcpy(ret,cryptopro_ext,36);
1185 #ifndef OPENSSL_NO_HEARTBEATS
1186 /* Add Heartbeat extension if we've received one */
1187 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED)
1189 s2n(TLSEXT_TYPE_heartbeat,ret);
1192 * 1: peer may send requests
1193 * 2: peer not allowed to send requests
1195 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
1196 *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
1198 *(ret++) = SSL_TLSEXT_HB_ENABLED;
1203 #ifndef OPENSSL_NO_NEXTPROTONEG
1204 next_proto_neg_seen = s->s3->next_proto_neg_seen;
1205 s->s3->next_proto_neg_seen = 0;
1206 if (next_proto_neg_seen && s->ctx->next_protos_advertised_cb)
1208 const unsigned char *npa;
1209 unsigned int npalen;
1212 r = s->ctx->next_protos_advertised_cb(s, &npa, &npalen, s->ctx->next_protos_advertised_cb_arg);
1213 if (r == SSL_TLSEXT_ERR_OK)
1215 if ((long)(limit - ret - 4 - npalen) < 0) return NULL;
1216 s2n(TLSEXT_TYPE_next_proto_neg,ret);
1218 memcpy(ret, npa, npalen);
1220 s->s3->next_proto_neg_seen = 1;
1225 /* If the client supports authz then see whether we have any to offer
1227 if (s->s3->tlsext_authz_client_types_len)
1229 size_t authz_length;
1230 /* By now we already know the new cipher, so we can look ahead
1231 * to see whether the cert we are going to send
1232 * has any authz data attached to it. */
1233 const unsigned char* authz = ssl_get_authz_data(s, &authz_length);
1234 const unsigned char* const orig_authz = authz;
1236 unsigned authz_count = 0;
1238 /* The authz data contains a number of the following structures:
1239 * uint8_t authz_type
1241 * uint8_t data[length]
1243 * First we walk over it to find the number of authz elements. */
1244 for (i = 0; i < authz_length; i++)
1246 unsigned short length;
1250 if (memchr(s->s3->tlsext_authz_client_types,
1252 s->s3->tlsext_authz_client_types_len) != NULL)
1256 /* n2s increments authz by 2 */
1264 /* Add TLS extension server_authz to the ServerHello message
1265 * 2 bytes for extension type
1266 * 2 bytes for extension length
1267 * 1 byte for the list length
1268 * n bytes for the list */
1269 const unsigned short ext_len = 1 + authz_count;
1271 if ((long)(limit - ret - 4 - ext_len) < 0) return NULL;
1272 s2n(TLSEXT_TYPE_server_authz, ret);
1274 *(ret++) = authz_count;
1275 s->s3->tlsext_authz_promised_to_client = 1;
1279 for (i = 0; i < authz_length; i++)
1281 unsigned short length;
1286 if (memchr(s->s3->tlsext_authz_client_types,
1288 s->s3->tlsext_authz_client_types_len) != NULL)
1291 /* n2s increments authz by 2 */
1298 if ((extdatalen = ret-p-2)== 0)
1305 static int ssl_scan_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1307 unsigned short type;
1308 unsigned short size;
1310 unsigned char *data = *p;
1311 int renegotiate_seen = 0;
1313 s->servername_done = 0;
1314 s->tlsext_status_type = -1;
1315 #ifndef OPENSSL_NO_NEXTPROTONEG
1316 s->s3->next_proto_neg_seen = 0;
1319 #ifndef OPENSSL_NO_HEARTBEATS
1320 s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
1321 SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
1323 /* Clear any signature algorithms extension received */
1324 if (s->cert->peer_sigalgs)
1326 OPENSSL_free(s->cert->peer_sigalgs);
1327 s->cert->peer_sigalgs = NULL;
1329 /* Clear any shared sigtnature algorithms */
1330 if (s->cert->shared_sigalgs)
1332 OPENSSL_free(s->cert->shared_sigalgs);
1333 s->cert->shared_sigalgs = NULL;
1336 if (data >= (d+n-2))
1340 if (data > (d+n-len))
1343 while (data <= (d+n-4))
1348 if (data+size > (d+n))
1351 fprintf(stderr,"Received extension type %d size %d\n",type,size);
1353 if (s->tlsext_debug_cb)
1354 s->tlsext_debug_cb(s, 0, type, data, size,
1355 s->tlsext_debug_arg);
1356 /* The servername extension is treated as follows:
1358 - Only the hostname type is supported with a maximum length of 255.
1359 - The servername is rejected if too long or if it contains zeros,
1360 in which case an fatal alert is generated.
1361 - The servername field is maintained together with the session cache.
1362 - When a session is resumed, the servername call back invoked in order
1363 to allow the application to position itself to the right context.
1364 - The servername is acknowledged if it is new for a session or when
1365 it is identical to a previously used for the same session.
1366 Applications can control the behaviour. They can at any time
1367 set a 'desirable' servername for a new SSL object. This can be the
1368 case for example with HTTPS when a Host: header field is received and
1369 a renegotiation is requested. In this case, a possible servername
1370 presented in the new client hello is only acknowledged if it matches
1371 the value of the Host: field.
1372 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
1373 if they provide for changing an explicit servername context for the session,
1374 i.e. when the session has been established with a servername extension.
1375 - On session reconnect, the servername extension may be absent.
1379 if (type == TLSEXT_TYPE_server_name)
1381 unsigned char *sdata;
1387 *al = SSL_AD_DECODE_ERROR;
1394 *al = SSL_AD_DECODE_ERROR;
1401 servname_type = *(sdata++);
1407 *al = SSL_AD_DECODE_ERROR;
1410 if (s->servername_done == 0)
1411 switch (servname_type)
1413 case TLSEXT_NAMETYPE_host_name:
1416 if(s->session->tlsext_hostname)
1418 *al = SSL_AD_DECODE_ERROR;
1421 if (len > TLSEXT_MAXLEN_host_name)
1423 *al = TLS1_AD_UNRECOGNIZED_NAME;
1426 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
1428 *al = TLS1_AD_INTERNAL_ERROR;
1431 memcpy(s->session->tlsext_hostname, sdata, len);
1432 s->session->tlsext_hostname[len]='\0';
1433 if (strlen(s->session->tlsext_hostname) != len) {
1434 OPENSSL_free(s->session->tlsext_hostname);
1435 s->session->tlsext_hostname = NULL;
1436 *al = TLS1_AD_UNRECOGNIZED_NAME;
1439 s->servername_done = 1;
1443 s->servername_done = s->session->tlsext_hostname
1444 && strlen(s->session->tlsext_hostname) == len
1445 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
1457 *al = SSL_AD_DECODE_ERROR;
1462 #ifndef OPENSSL_NO_SRP
1463 else if (type == TLSEXT_TYPE_srp)
1465 if (size <= 0 || ((len = data[0])) != (size -1))
1467 *al = SSL_AD_DECODE_ERROR;
1470 if (s->srp_ctx.login != NULL)
1472 *al = SSL_AD_DECODE_ERROR;
1475 if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
1477 memcpy(s->srp_ctx.login, &data[1], len);
1478 s->srp_ctx.login[len]='\0';
1480 if (strlen(s->srp_ctx.login) != len)
1482 *al = SSL_AD_DECODE_ERROR;
1488 #ifndef OPENSSL_NO_EC
1489 else if (type == TLSEXT_TYPE_ec_point_formats &&
1490 s->version != DTLS1_VERSION)
1492 unsigned char *sdata = data;
1493 int ecpointformatlist_length = *(sdata++);
1495 if (ecpointformatlist_length != size - 1)
1497 *al = TLS1_AD_DECODE_ERROR;
1502 if(s->session->tlsext_ecpointformatlist)
1504 OPENSSL_free(s->session->tlsext_ecpointformatlist);
1505 s->session->tlsext_ecpointformatlist = NULL;
1507 s->session->tlsext_ecpointformatlist_length = 0;
1508 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1510 *al = TLS1_AD_INTERNAL_ERROR;
1513 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1514 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1517 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
1518 sdata = s->session->tlsext_ecpointformatlist;
1519 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1520 fprintf(stderr,"%i ",*(sdata++));
1521 fprintf(stderr,"\n");
1524 else if (type == TLSEXT_TYPE_elliptic_curves &&
1525 s->version != DTLS1_VERSION)
1527 unsigned char *sdata = data;
1528 int ellipticcurvelist_length = (*(sdata++) << 8);
1529 ellipticcurvelist_length += (*(sdata++));
1531 if (ellipticcurvelist_length != size - 2)
1533 *al = TLS1_AD_DECODE_ERROR;
1538 if(s->session->tlsext_ellipticcurvelist)
1540 *al = TLS1_AD_DECODE_ERROR;
1543 s->session->tlsext_ellipticcurvelist_length = 0;
1544 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
1546 *al = TLS1_AD_INTERNAL_ERROR;
1549 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
1550 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
1553 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
1554 sdata = s->session->tlsext_ellipticcurvelist;
1555 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
1556 fprintf(stderr,"%i ",*(sdata++));
1557 fprintf(stderr,"\n");
1560 #endif /* OPENSSL_NO_EC */
1561 #ifdef TLSEXT_TYPE_opaque_prf_input
1562 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1563 s->version != DTLS1_VERSION)
1565 unsigned char *sdata = data;
1569 *al = SSL_AD_DECODE_ERROR;
1572 n2s(sdata, s->s3->client_opaque_prf_input_len);
1573 if (s->s3->client_opaque_prf_input_len != size - 2)
1575 *al = SSL_AD_DECODE_ERROR;
1579 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1580 OPENSSL_free(s->s3->client_opaque_prf_input);
1581 if (s->s3->client_opaque_prf_input_len == 0)
1582 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1584 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
1585 if (s->s3->client_opaque_prf_input == NULL)
1587 *al = TLS1_AD_INTERNAL_ERROR;
1592 else if (type == TLSEXT_TYPE_session_ticket)
1594 if (s->tls_session_ticket_ext_cb &&
1595 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1597 *al = TLS1_AD_INTERNAL_ERROR;
1601 else if (type == TLSEXT_TYPE_renegotiate)
1603 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
1605 renegotiate_seen = 1;
1607 else if (type == TLSEXT_TYPE_signature_algorithms)
1610 if (s->cert->peer_sigalgs || size < 2)
1612 *al = SSL_AD_DECODE_ERROR;
1617 if (dsize != size || dsize & 1 || !dsize)
1619 *al = SSL_AD_DECODE_ERROR;
1622 if (!tls1_process_sigalgs(s, data, dsize))
1624 *al = SSL_AD_DECODE_ERROR;
1627 /* If sigalgs received and no shared algorithms fatal
1630 if (s->cert->peer_sigalgs && !s->cert->shared_sigalgs)
1632 SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
1633 SSL_R_NO_SHARED_SIGATURE_ALGORITHMS);
1634 *al = SSL_AD_ILLEGAL_PARAMETER;
1638 else if (type == TLSEXT_TYPE_status_request &&
1639 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
1644 *al = SSL_AD_DECODE_ERROR;
1648 s->tlsext_status_type = *data++;
1650 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
1652 const unsigned char *sdata;
1654 /* Read in responder_id_list */
1659 *al = SSL_AD_DECODE_ERROR;
1668 *al = SSL_AD_DECODE_ERROR;
1672 dsize -= 2 + idsize;
1676 *al = SSL_AD_DECODE_ERROR;
1681 id = d2i_OCSP_RESPID(NULL,
1685 *al = SSL_AD_DECODE_ERROR;
1690 OCSP_RESPID_free(id);
1691 *al = SSL_AD_DECODE_ERROR;
1694 if (!s->tlsext_ocsp_ids
1695 && !(s->tlsext_ocsp_ids =
1696 sk_OCSP_RESPID_new_null()))
1698 OCSP_RESPID_free(id);
1699 *al = SSL_AD_INTERNAL_ERROR;
1702 if (!sk_OCSP_RESPID_push(
1703 s->tlsext_ocsp_ids, id))
1705 OCSP_RESPID_free(id);
1706 *al = SSL_AD_INTERNAL_ERROR;
1711 /* Read in request_extensions */
1714 *al = SSL_AD_DECODE_ERROR;
1721 *al = SSL_AD_DECODE_ERROR;
1727 if (s->tlsext_ocsp_exts)
1729 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
1730 X509_EXTENSION_free);
1733 s->tlsext_ocsp_exts =
1734 d2i_X509_EXTENSIONS(NULL,
1736 if (!s->tlsext_ocsp_exts
1737 || (data + dsize != sdata))
1739 *al = SSL_AD_DECODE_ERROR;
1744 /* We don't know what to do with any other type
1748 s->tlsext_status_type = -1;
1750 #ifndef OPENSSL_NO_HEARTBEATS
1751 else if (type == TLSEXT_TYPE_heartbeat)
1755 case 0x01: /* Client allows us to send HB requests */
1756 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1758 case 0x02: /* Client doesn't accept HB requests */
1759 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1760 s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
1762 default: *al = SSL_AD_ILLEGAL_PARAMETER;
1767 #ifndef OPENSSL_NO_NEXTPROTONEG
1768 else if (type == TLSEXT_TYPE_next_proto_neg &&
1769 s->s3->tmp.finish_md_len == 0)
1771 /* We shouldn't accept this extension on a
1774 * s->new_session will be set on renegotiation, but we
1775 * probably shouldn't rely that it couldn't be set on
1776 * the initial renegotation too in certain cases (when
1777 * there's some other reason to disallow resuming an
1778 * earlier session -- the current code won't be doing
1779 * anything like that, but this might change).
1781 * A valid sign that there's been a previous handshake
1782 * in this connection is if s->s3->tmp.finish_md_len >
1783 * 0. (We are talking about a check that will happen
1784 * in the Hello protocol round, well before a new
1785 * Finished message could have been computed.) */
1786 s->s3->next_proto_neg_seen = 1;
1790 /* session ticket processed earlier */
1791 else if (type == TLSEXT_TYPE_use_srtp)
1793 if(ssl_parse_clienthello_use_srtp_ext(s, data, size,
1798 else if (type == TLSEXT_TYPE_server_authz)
1800 unsigned char *sdata = data;
1801 unsigned char server_authz_dataformatlist_length;
1805 *al = TLS1_AD_DECODE_ERROR;
1809 server_authz_dataformatlist_length = *(sdata++);
1811 if (server_authz_dataformatlist_length != size - 1)
1813 *al = TLS1_AD_DECODE_ERROR;
1817 /* Successful session resumption uses the same authz
1818 * information as the original session so we ignore this
1819 * in the case of a session resumption. */
1823 if (s->s3->tlsext_authz_client_types != NULL)
1824 OPENSSL_free(s->s3->tlsext_authz_client_types);
1825 s->s3->tlsext_authz_client_types =
1826 OPENSSL_malloc(server_authz_dataformatlist_length);
1827 if (!s->s3->tlsext_authz_client_types)
1829 *al = TLS1_AD_INTERNAL_ERROR;
1833 s->s3->tlsext_authz_client_types_len =
1834 server_authz_dataformatlist_length;
1835 memcpy(s->s3->tlsext_authz_client_types,
1837 server_authz_dataformatlist_length);
1839 /* Sort the types in order to check for duplicates. */
1840 qsort(s->s3->tlsext_authz_client_types,
1841 server_authz_dataformatlist_length,
1842 1 /* element size */,
1845 for (i = 0; i < server_authz_dataformatlist_length; i++)
1848 s->s3->tlsext_authz_client_types[i] ==
1849 s->s3->tlsext_authz_client_types[i-1])
1851 *al = TLS1_AD_DECODE_ERROR;
1865 /* Need RI if renegotiating */
1867 if (!renegotiate_seen && s->renegotiate &&
1868 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1870 *al = SSL_AD_HANDSHAKE_FAILURE;
1871 SSLerr(SSL_F_SSL_SCAN_CLIENTHELLO_TLSEXT,
1872 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1875 /* If no signature algorithms extension set default values */
1876 if (!s->cert->peer_sigalgs)
1877 ssl_cert_set_default_md(s->cert);
1882 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n)
1885 if (ssl_scan_clienthello_tlsext(s, p, d, n, &al) <= 0)
1887 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1891 if (ssl_check_clienthello_tlsext(s) <= 0)
1893 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,SSL_R_CLIENTHELLO_TLSEXT);
1899 #ifndef OPENSSL_NO_NEXTPROTONEG
1900 /* ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1901 * elements of zero length are allowed and the set of elements must exactly fill
1902 * the length of the block. */
1903 static char ssl_next_proto_validate(unsigned char *d, unsigned len)
1905 unsigned int off = 0;
1919 static int ssl_scan_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1921 unsigned short length;
1922 unsigned short type;
1923 unsigned short size;
1924 unsigned char *data = *p;
1925 int tlsext_servername = 0;
1926 int renegotiate_seen = 0;
1928 #ifndef OPENSSL_NO_NEXTPROTONEG
1929 s->s3->next_proto_neg_seen = 0;
1932 #ifndef OPENSSL_NO_HEARTBEATS
1933 s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
1934 SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
1937 if (data >= (d+n-2))
1941 if (data+length != d+n)
1943 *al = SSL_AD_DECODE_ERROR;
1947 while(data <= (d+n-4))
1952 if (data+size > (d+n))
1955 if (s->tlsext_debug_cb)
1956 s->tlsext_debug_cb(s, 1, type, data, size,
1957 s->tlsext_debug_arg);
1959 if (type == TLSEXT_TYPE_server_name)
1961 if (s->tlsext_hostname == NULL || size > 0)
1963 *al = TLS1_AD_UNRECOGNIZED_NAME;
1966 tlsext_servername = 1;
1969 #ifndef OPENSSL_NO_EC
1970 else if (type == TLSEXT_TYPE_ec_point_formats &&
1971 s->version != DTLS1_VERSION)
1973 unsigned char *sdata = data;
1974 int ecpointformatlist_length = *(sdata++);
1976 if (ecpointformatlist_length != size - 1)
1978 *al = TLS1_AD_DECODE_ERROR;
1981 s->session->tlsext_ecpointformatlist_length = 0;
1982 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1983 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1985 *al = TLS1_AD_INTERNAL_ERROR;
1988 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1989 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1991 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1992 sdata = s->session->tlsext_ecpointformatlist;
1993 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1994 fprintf(stderr,"%i ",*(sdata++));
1995 fprintf(stderr,"\n");
1998 #endif /* OPENSSL_NO_EC */
2000 else if (type == TLSEXT_TYPE_session_ticket)
2002 if (s->tls_session_ticket_ext_cb &&
2003 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
2005 *al = TLS1_AD_INTERNAL_ERROR;
2008 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
2011 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2014 s->tlsext_ticket_expected = 1;
2016 #ifdef TLSEXT_TYPE_opaque_prf_input
2017 else if (type == TLSEXT_TYPE_opaque_prf_input &&
2018 s->version != DTLS1_VERSION)
2020 unsigned char *sdata = data;
2024 *al = SSL_AD_DECODE_ERROR;
2027 n2s(sdata, s->s3->server_opaque_prf_input_len);
2028 if (s->s3->server_opaque_prf_input_len != size - 2)
2030 *al = SSL_AD_DECODE_ERROR;
2034 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
2035 OPENSSL_free(s->s3->server_opaque_prf_input);
2036 if (s->s3->server_opaque_prf_input_len == 0)
2037 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
2039 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
2041 if (s->s3->server_opaque_prf_input == NULL)
2043 *al = TLS1_AD_INTERNAL_ERROR;
2048 else if (type == TLSEXT_TYPE_status_request &&
2049 s->version != DTLS1_VERSION)
2051 /* MUST be empty and only sent if we've requested
2052 * a status request message.
2054 if ((s->tlsext_status_type == -1) || (size > 0))
2056 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2059 /* Set flag to expect CertificateStatus message */
2060 s->tlsext_status_expected = 1;
2062 #ifndef OPENSSL_NO_NEXTPROTONEG
2063 else if (type == TLSEXT_TYPE_next_proto_neg &&
2064 s->s3->tmp.finish_md_len == 0)
2066 unsigned char *selected;
2067 unsigned char selected_len;
2069 /* We must have requested it. */
2070 if ((s->ctx->next_proto_select_cb == NULL))
2072 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2075 /* The data must be valid */
2076 if (!ssl_next_proto_validate(data, size))
2078 *al = TLS1_AD_DECODE_ERROR;
2081 if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, data, size, s->ctx->next_proto_select_cb_arg) != SSL_TLSEXT_ERR_OK)
2083 *al = TLS1_AD_INTERNAL_ERROR;
2086 s->next_proto_negotiated = OPENSSL_malloc(selected_len);
2087 if (!s->next_proto_negotiated)
2089 *al = TLS1_AD_INTERNAL_ERROR;
2092 memcpy(s->next_proto_negotiated, selected, selected_len);
2093 s->next_proto_negotiated_len = selected_len;
2094 s->s3->next_proto_neg_seen = 1;
2097 else if (type == TLSEXT_TYPE_renegotiate)
2099 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
2101 renegotiate_seen = 1;
2103 #ifndef OPENSSL_NO_HEARTBEATS
2104 else if (type == TLSEXT_TYPE_heartbeat)
2108 case 0x01: /* Server allows us to send HB requests */
2109 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
2111 case 0x02: /* Server doesn't accept HB requests */
2112 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
2113 s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
2115 default: *al = SSL_AD_ILLEGAL_PARAMETER;
2120 else if (type == TLSEXT_TYPE_use_srtp)
2122 if(ssl_parse_serverhello_use_srtp_ext(s, data, size,
2127 else if (type == TLSEXT_TYPE_server_authz)
2129 /* We only support audit proofs. It's an error to send
2130 * an authz hello extension if the client
2131 * didn't request a proof. */
2132 unsigned char *sdata = data;
2133 unsigned char server_authz_dataformatlist_length;
2135 if (!s->ctx->tlsext_authz_server_audit_proof_cb)
2137 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2143 *al = TLS1_AD_DECODE_ERROR;
2147 server_authz_dataformatlist_length = *(sdata++);
2148 if (server_authz_dataformatlist_length != size - 1)
2150 *al = TLS1_AD_DECODE_ERROR;
2154 /* We only support audit proofs, so a legal ServerHello
2155 * authz list contains exactly one entry. */
2156 if (server_authz_dataformatlist_length != 1 ||
2157 sdata[0] != TLSEXT_AUTHZDATAFORMAT_audit_proof)
2159 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
2163 s->s3->tlsext_authz_server_promised = 1;
2171 *al = SSL_AD_DECODE_ERROR;
2175 if (!s->hit && tlsext_servername == 1)
2177 if (s->tlsext_hostname)
2179 if (s->session->tlsext_hostname == NULL)
2181 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
2182 if (!s->session->tlsext_hostname)
2184 *al = SSL_AD_UNRECOGNIZED_NAME;
2190 *al = SSL_AD_DECODE_ERROR;
2200 /* Determine if we need to see RI. Strictly speaking if we want to
2201 * avoid an attack we should *always* see RI even on initial server
2202 * hello because the client doesn't see any renegotiation during an
2203 * attack. However this would mean we could not connect to any server
2204 * which doesn't support RI so for the immediate future tolerate RI
2205 * absence on initial connect only.
2207 if (!renegotiate_seen
2208 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
2209 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
2211 *al = SSL_AD_HANDSHAKE_FAILURE;
2212 SSLerr(SSL_F_SSL_SCAN_SERVERHELLO_TLSEXT,
2213 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
2221 int ssl_prepare_clienthello_tlsext(SSL *s)
2224 #ifdef TLSEXT_TYPE_opaque_prf_input
2228 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
2230 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
2235 if (s->tlsext_opaque_prf_input != NULL)
2237 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
2238 OPENSSL_free(s->s3->client_opaque_prf_input);
2240 if (s->tlsext_opaque_prf_input_len == 0)
2241 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
2243 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
2244 if (s->s3->client_opaque_prf_input == NULL)
2246 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
2249 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
2253 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
2254 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
2261 int ssl_prepare_serverhello_tlsext(SSL *s)
2263 #ifndef OPENSSL_NO_EC
2264 /* If we are server and using an ECC cipher suite, send the point formats we support
2265 * if the client sent us an ECPointsFormat extension. Note that the server is not
2266 * supposed to send an EllipticCurves extension.
2269 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2270 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2271 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
2272 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
2276 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
2277 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
2279 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
2282 s->tlsext_ecpointformatlist_length = 3;
2283 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
2284 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
2285 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
2287 #endif /* OPENSSL_NO_EC */
2292 static int ssl_check_clienthello_tlsext(SSL *s)
2294 int ret=SSL_TLSEXT_ERR_NOACK;
2295 int al = SSL_AD_UNRECOGNIZED_NAME;
2297 #ifndef OPENSSL_NO_EC
2298 /* The handling of the ECPointFormats extension is done elsewhere, namely in
2299 * ssl3_choose_cipher in s3_lib.c.
2301 /* The handling of the EllipticCurves extension is done elsewhere, namely in
2302 * ssl3_choose_cipher in s3_lib.c.
2306 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
2307 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
2308 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
2309 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
2311 /* If status request then ask callback what to do.
2312 * Note: this must be called after servername callbacks in case
2313 * the certificate has changed.
2315 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
2318 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2321 /* We don't want to send a status request response */
2322 case SSL_TLSEXT_ERR_NOACK:
2323 s->tlsext_status_expected = 0;
2325 /* status request response should be sent */
2326 case SSL_TLSEXT_ERR_OK:
2327 if (s->tlsext_ocsp_resp)
2328 s->tlsext_status_expected = 1;
2330 s->tlsext_status_expected = 0;
2332 /* something bad happened */
2333 case SSL_TLSEXT_ERR_ALERT_FATAL:
2334 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2335 al = SSL_AD_INTERNAL_ERROR;
2340 s->tlsext_status_expected = 0;
2342 #ifdef TLSEXT_TYPE_opaque_prf_input
2344 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
2345 * but we might be sending an alert in response to the client hello,
2346 * so this has to happen here in ssl_check_clienthello_tlsext(). */
2350 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
2352 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
2355 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2356 al = SSL_AD_INTERNAL_ERROR;
2361 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
2362 OPENSSL_free(s->s3->server_opaque_prf_input);
2363 s->s3->server_opaque_prf_input = NULL;
2365 if (s->tlsext_opaque_prf_input != NULL)
2367 if (s->s3->client_opaque_prf_input != NULL &&
2368 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
2370 /* can only use this extension if we have a server opaque PRF input
2371 * of the same length as the client opaque PRF input! */
2373 if (s->tlsext_opaque_prf_input_len == 0)
2374 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
2376 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
2377 if (s->s3->server_opaque_prf_input == NULL)
2379 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2380 al = SSL_AD_INTERNAL_ERROR;
2383 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
2387 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
2389 /* The callback wants to enforce use of the extension,
2390 * but we can't do that with the client opaque PRF input;
2391 * abort the handshake.
2393 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2394 al = SSL_AD_HANDSHAKE_FAILURE;
2402 case SSL_TLSEXT_ERR_ALERT_FATAL:
2403 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2406 case SSL_TLSEXT_ERR_ALERT_WARNING:
2407 ssl3_send_alert(s,SSL3_AL_WARNING,al);
2410 case SSL_TLSEXT_ERR_NOACK:
2411 s->servername_done=0;
2417 int ssl_check_serverhello_tlsext(SSL *s)
2419 int ret=SSL_TLSEXT_ERR_NOACK;
2420 int al = SSL_AD_UNRECOGNIZED_NAME;
2422 #ifndef OPENSSL_NO_EC
2423 /* If we are client and using an elliptic curve cryptography cipher
2424 * suite, then if server returns an EC point formats lists extension
2425 * it must contain uncompressed.
2427 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
2428 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
2429 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
2430 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
2431 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
2433 /* we are using an ECC cipher */
2435 unsigned char *list;
2436 int found_uncompressed = 0;
2437 list = s->session->tlsext_ecpointformatlist;
2438 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
2440 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
2442 found_uncompressed = 1;
2446 if (!found_uncompressed)
2448 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
2452 ret = SSL_TLSEXT_ERR_OK;
2453 #endif /* OPENSSL_NO_EC */
2455 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
2456 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
2457 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
2458 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
2460 #ifdef TLSEXT_TYPE_opaque_prf_input
2461 if (s->s3->server_opaque_prf_input_len > 0)
2463 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
2464 * So first verify that we really have a value from the server too. */
2466 if (s->s3->server_opaque_prf_input == NULL)
2468 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2469 al = SSL_AD_HANDSHAKE_FAILURE;
2472 /* Anytime the server *has* sent an opaque PRF input, we need to check
2473 * that we have a client opaque PRF input of the same size. */
2474 if (s->s3->client_opaque_prf_input == NULL ||
2475 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
2477 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2478 al = SSL_AD_ILLEGAL_PARAMETER;
2483 /* If we've requested certificate status and we wont get one
2486 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
2487 && s->ctx && s->ctx->tlsext_status_cb)
2490 /* Set resp to NULL, resplen to -1 so callback knows
2491 * there is no response.
2493 if (s->tlsext_ocsp_resp)
2495 OPENSSL_free(s->tlsext_ocsp_resp);
2496 s->tlsext_ocsp_resp = NULL;
2498 s->tlsext_ocsp_resplen = -1;
2499 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
2502 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
2503 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2507 al = SSL_AD_INTERNAL_ERROR;
2508 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
2514 case SSL_TLSEXT_ERR_ALERT_FATAL:
2515 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2518 case SSL_TLSEXT_ERR_ALERT_WARNING:
2519 ssl3_send_alert(s,SSL3_AL_WARNING,al);
2522 case SSL_TLSEXT_ERR_NOACK:
2523 s->servername_done=0;
2529 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n)
2532 if (s->version < SSL3_VERSION)
2534 if (ssl_scan_serverhello_tlsext(s, p, d, n, &al) <= 0)
2536 ssl3_send_alert(s,SSL3_AL_FATAL,al);
2540 if (ssl_check_serverhello_tlsext(s) <= 0)
2542 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,SSL_R_SERVERHELLO_TLSEXT);
2548 /* Since the server cache lookup is done early on in the processing of the
2549 * ClientHello, and other operations depend on the result, we need to handle
2550 * any TLS session ticket extension at the same time.
2552 * session_id: points at the session ID in the ClientHello. This code will
2553 * read past the end of this in order to parse out the session ticket
2554 * extension, if any.
2555 * len: the length of the session ID.
2556 * limit: a pointer to the first byte after the ClientHello.
2557 * ret: (output) on return, if a ticket was decrypted, then this is set to
2558 * point to the resulting session.
2560 * If s->tls_session_secret_cb is set then we are expecting a pre-shared key
2561 * ciphersuite, in which case we have no use for session tickets and one will
2562 * never be decrypted, nor will s->tlsext_ticket_expected be set to 1.
2565 * -1: fatal error, either from parsing or decrypting the ticket.
2566 * 0: no ticket was found (or was ignored, based on settings).
2567 * 1: a zero length extension was found, indicating that the client supports
2568 * session tickets but doesn't currently have one to offer.
2569 * 2: either s->tls_session_secret_cb was set, or a ticket was offered but
2570 * couldn't be decrypted because of a non-fatal error.
2571 * 3: a ticket was successfully decrypted and *ret was set.
2574 * Sets s->tlsext_ticket_expected to 1 if the server will have to issue
2575 * a new session ticket to the client because the client indicated support
2576 * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
2577 * a session ticket or we couldn't use the one it gave us, or if
2578 * s->ctx->tlsext_ticket_key_cb asked to renew the client's ticket.
2579 * Otherwise, s->tlsext_ticket_expected is set to 0.
2581 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
2582 const unsigned char *limit, SSL_SESSION **ret)
2584 /* Point after session ID in client hello */
2585 const unsigned char *p = session_id + len;
2589 s->tlsext_ticket_expected = 0;
2591 /* If tickets disabled behave as if no ticket present
2592 * to permit stateful resumption.
2594 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
2596 if ((s->version <= SSL3_VERSION) || !limit)
2600 /* Skip past DTLS cookie */
2601 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
2608 /* Skip past cipher list */
2613 /* Skip past compression algorithm list */
2618 /* Now at start of extensions */
2619 if ((p + 2) >= limit)
2622 while ((p + 4) <= limit)
2624 unsigned short type, size;
2627 if (p + size > limit)
2629 if (type == TLSEXT_TYPE_session_ticket)
2634 /* The client will accept a ticket but doesn't
2635 * currently have one. */
2636 s->tlsext_ticket_expected = 1;
2639 if (s->tls_session_secret_cb)
2641 /* Indicate that the ticket couldn't be
2642 * decrypted rather than generating the session
2643 * from ticket now, trigger abbreviated
2644 * handshake based on external mechanism to
2645 * calculate the master secret later. */
2648 r = tls_decrypt_ticket(s, p, size, session_id, len, ret);
2651 case 2: /* ticket couldn't be decrypted */
2652 s->tlsext_ticket_expected = 1;
2654 case 3: /* ticket was decrypted */
2656 case 4: /* ticket decrypted but need to renew */
2657 s->tlsext_ticket_expected = 1;
2659 default: /* fatal error */
2668 /* tls_decrypt_ticket attempts to decrypt a session ticket.
2670 * etick: points to the body of the session ticket extension.
2671 * eticklen: the length of the session tickets extenion.
2672 * sess_id: points at the session ID.
2673 * sesslen: the length of the session ID.
2674 * psess: (output) on return, if a ticket was decrypted, then this is set to
2675 * point to the resulting session.
2678 * -1: fatal error, either from parsing or decrypting the ticket.
2679 * 2: the ticket couldn't be decrypted.
2680 * 3: a ticket was successfully decrypted and *psess was set.
2681 * 4: same as 3, but the ticket needs to be renewed.
2683 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
2684 const unsigned char *sess_id, int sesslen,
2685 SSL_SESSION **psess)
2688 unsigned char *sdec;
2689 const unsigned char *p;
2690 int slen, mlen, renew_ticket = 0;
2691 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
2694 SSL_CTX *tctx = s->initial_ctx;
2695 /* Need at least keyname + iv + some encrypted data */
2698 /* Initialize session ticket encryption and HMAC contexts */
2699 HMAC_CTX_init(&hctx);
2700 EVP_CIPHER_CTX_init(&ctx);
2701 if (tctx->tlsext_ticket_key_cb)
2703 unsigned char *nctick = (unsigned char *)etick;
2704 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
2715 /* Check key name matches */
2716 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
2718 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
2719 tlsext_tick_md(), NULL);
2720 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
2721 tctx->tlsext_tick_aes_key, etick + 16);
2723 /* Attempt to process session ticket, first conduct sanity and
2724 * integrity checks on ticket.
2726 mlen = HMAC_size(&hctx);
2729 EVP_CIPHER_CTX_cleanup(&ctx);
2733 /* Check HMAC of encrypted ticket */
2734 HMAC_Update(&hctx, etick, eticklen);
2735 HMAC_Final(&hctx, tick_hmac, NULL);
2736 HMAC_CTX_cleanup(&hctx);
2737 if (memcmp(tick_hmac, etick + eticklen, mlen))
2739 /* Attempt to decrypt session data */
2740 /* Move p after IV to start of encrypted ticket, update length */
2741 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
2742 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
2743 sdec = OPENSSL_malloc(eticklen);
2746 EVP_CIPHER_CTX_cleanup(&ctx);
2749 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
2750 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
2753 EVP_CIPHER_CTX_cleanup(&ctx);
2756 sess = d2i_SSL_SESSION(NULL, &p, slen);
2760 /* The session ID, if non-empty, is used by some clients to
2761 * detect that the ticket has been accepted. So we copy it to
2762 * the session structure. If it is empty set length to zero
2763 * as required by standard.
2766 memcpy(sess->session_id, sess_id, sesslen);
2767 sess->session_id_length = sesslen;
2775 /* For session parse failure, indicate that we need to send a new
2780 /* Tables to translate from NIDs to TLS v1.2 ids */
2788 static tls12_lookup tls12_md[] = {
2789 {NID_md5, TLSEXT_hash_md5},
2790 {NID_sha1, TLSEXT_hash_sha1},
2791 {NID_sha224, TLSEXT_hash_sha224},
2792 {NID_sha256, TLSEXT_hash_sha256},
2793 {NID_sha384, TLSEXT_hash_sha384},
2794 {NID_sha512, TLSEXT_hash_sha512}
2797 static tls12_lookup tls12_sig[] = {
2798 {EVP_PKEY_RSA, TLSEXT_signature_rsa},
2799 {EVP_PKEY_DSA, TLSEXT_signature_dsa},
2800 {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
2803 static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
2806 for (i = 0; i < tlen; i++)
2808 if (table[i].nid == nid)
2814 static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen)
2817 for (i = 0; i < tlen; i++)
2819 if ((table[i].id) == id)
2820 return table[i].nid;
2825 int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
2830 md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
2831 sizeof(tls12_md)/sizeof(tls12_lookup));
2834 sig_id = tls12_get_sigid(pk);
2837 p[0] = (unsigned char)md_id;
2838 p[1] = (unsigned char)sig_id;
2842 int tls12_get_sigid(const EVP_PKEY *pk)
2844 return tls12_find_id(pk->type, tls12_sig,
2845 sizeof(tls12_sig)/sizeof(tls12_lookup));
2848 const EVP_MD *tls12_get_hash(unsigned char hash_alg)
2852 #ifndef OPENSSL_NO_MD5
2853 case TLSEXT_hash_md5:
2860 #ifndef OPENSSL_NO_SHA
2861 case TLSEXT_hash_sha1:
2864 #ifndef OPENSSL_NO_SHA256
2865 case TLSEXT_hash_sha224:
2866 return EVP_sha224();
2868 case TLSEXT_hash_sha256:
2869 return EVP_sha256();
2871 #ifndef OPENSSL_NO_SHA512
2872 case TLSEXT_hash_sha384:
2873 return EVP_sha384();
2875 case TLSEXT_hash_sha512:
2876 return EVP_sha512();
2884 static int tls12_get_pkey_idx(unsigned char sig_alg)
2888 #ifndef OPENSSL_NO_RSA
2889 case TLSEXT_signature_rsa:
2890 return SSL_PKEY_RSA_SIGN;
2892 #ifndef OPENSSL_NO_DSA
2893 case TLSEXT_signature_dsa:
2894 return SSL_PKEY_DSA_SIGN;
2896 #ifndef OPENSSL_NO_ECDSA
2897 case TLSEXT_signature_ecdsa:
2898 return SSL_PKEY_ECC;
2904 /* Convert TLS 1.2 signature algorithm extension values into NIDs */
2905 static void tls1_lookup_sigalg(int *phash_nid, int *psign_nid,
2906 int *psignhash_nid, const unsigned char *data)
2908 int sign_nid, hash_nid;
2909 if (!phash_nid && !psign_nid && !psignhash_nid)
2911 if (phash_nid || psignhash_nid)
2913 hash_nid = tls12_find_nid(data[0], tls12_md,
2914 sizeof(tls12_md)/sizeof(tls12_lookup));
2916 *phash_nid = hash_nid;
2918 if (psign_nid || psignhash_nid)
2920 sign_nid = tls12_find_nid(data[1], tls12_sig,
2921 sizeof(tls12_sig)/sizeof(tls12_lookup));
2923 *psign_nid = sign_nid;
2927 if (sign_nid && hash_nid)
2928 OBJ_find_sigid_by_algs(psignhash_nid,
2929 hash_nid, sign_nid);
2931 *psignhash_nid = NID_undef;
2934 /* Given preference and allowed sigalgs set shared sigalgs */
2935 static int tls12_do_shared_sigalgs(TLS_SIGALGS *shsig,
2936 const unsigned char *pref, size_t preflen,
2937 const unsigned char *allow, size_t allowlen)
2939 const unsigned char *ptmp, *atmp;
2940 size_t i, j, nmatch = 0;
2941 for (i = 0, ptmp = pref; i < preflen; i+=2, ptmp+=2)
2943 /* Skip disabled hashes or signature algorithms */
2944 if (tls12_get_hash(ptmp[0]) == NULL)
2946 if (tls12_get_pkey_idx(ptmp[1]) == -1)
2948 for (j = 0, atmp = allow; j < allowlen; j+=2, atmp+=2)
2950 if (ptmp[0] == atmp[0] && ptmp[1] == atmp[1])
2955 shsig->rhash = ptmp[0];
2956 shsig->rsign = ptmp[1];
2957 tls1_lookup_sigalg(&shsig->hash_nid,
2959 &shsig->signandhash_nid,
2970 /* Set shared signature algorithms for SSL structures */
2971 static int tls1_set_shared_sigalgs(SSL *s)
2973 const unsigned char *pref, *allow, *conf;
2974 size_t preflen, allowlen, conflen;
2976 TLS_SIGALGS *salgs = NULL;
2978 conf = c->conf_sigalgs;
2980 conflen = c->conf_sigalgslen;
2983 conf = tls12_sigalgs;
2984 conflen = sizeof(tls12_sigalgs);
2990 if(s->options & SSL_OP_CIPHER_SERVER_PREFERENCE)
2994 allow = c->peer_sigalgs;
2995 allowlen = c->peer_sigalgslen;
3001 pref = c->peer_sigalgs;
3002 preflen = c->peer_sigalgslen;
3004 nmatch = tls12_do_shared_sigalgs(NULL, pref, preflen, allow, allowlen);
3007 salgs = OPENSSL_malloc(nmatch * sizeof(TLS_SIGALGS));
3010 nmatch = tls12_do_shared_sigalgs(salgs, pref, preflen, allow, allowlen);
3011 c->shared_sigalgs = salgs;
3012 c->shared_sigalgslen = nmatch;
3017 /* Set preferred digest for each key type */
3019 int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
3025 TLS_SIGALGS *sigptr;
3026 /* Extension ignored for TLS versions below 1.2 */
3027 if (TLS1_get_version(s) < TLS1_2_VERSION)
3029 /* Should never happen */
3033 c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL;
3034 c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL;
3035 c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
3036 c->pkeys[SSL_PKEY_ECC].digest = NULL;
3038 c->peer_sigalgs = OPENSSL_malloc(dsize);
3039 if (!c->peer_sigalgs)
3041 c->peer_sigalgslen = dsize;
3042 memcpy(c->peer_sigalgs, data, dsize);
3044 tls1_set_shared_sigalgs(s);
3046 for (i = 0, sigptr = c->shared_sigalgs;
3047 i < c->shared_sigalgslen; i++, sigptr++)
3049 idx = tls12_get_pkey_idx(sigptr->rsign);
3050 if (idx > 0 && c->pkeys[idx].digest == NULL)
3052 md = tls12_get_hash(sigptr->rhash);
3053 c->pkeys[idx].digest = md;
3054 if (idx == SSL_PKEY_RSA_SIGN)
3055 c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
3059 /* In strict mode leave unset digests as NULL to indicate we can't
3060 * use the certificate for signing.
3062 if (!(s->cert->cert_flags & SSL_CERT_FLAG_TLS_STRICT))
3064 /* Set any remaining keys to default values. NOTE: if alg is
3065 * not supported it stays as NULL.
3067 #ifndef OPENSSL_NO_DSA
3068 if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
3069 c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_sha1();
3071 #ifndef OPENSSL_NO_RSA
3072 if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
3074 c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
3075 c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
3078 #ifndef OPENSSL_NO_ECDSA
3079 if (!c->pkeys[SSL_PKEY_ECC].digest)
3080 c->pkeys[SSL_PKEY_ECC].digest = EVP_sha1();
3087 int SSL_get_sigalgs(SSL *s, int idx,
3088 int *psign, int *phash, int *psignhash,
3089 unsigned char *rsig, unsigned char *rhash)
3091 const unsigned char *psig = s->cert->peer_sigalgs;
3097 if (idx >= (int)s->cert->peer_sigalgslen)
3104 tls1_lookup_sigalg(phash, psign, psignhash, psig);
3106 return s->cert->peer_sigalgslen / 2;
3109 int SSL_get_shared_sigalgs(SSL *s, int idx,
3110 int *psign, int *phash, int *psignhash,
3111 unsigned char *rsig, unsigned char *rhash)
3113 TLS_SIGALGS *shsigalgs = s->cert->shared_sigalgs;
3114 if (!shsigalgs || idx >= (int)s->cert->shared_sigalgslen)
3118 *phash = shsigalgs->hash_nid;
3120 *psign = shsigalgs->sign_nid;
3122 *psignhash = shsigalgs->signandhash_nid;
3124 *rsig = shsigalgs->rsign;
3126 *rhash = shsigalgs->rhash;
3127 return s->cert->shared_sigalgslen;
3131 #ifndef OPENSSL_NO_HEARTBEATS
3133 tls1_process_heartbeat(SSL *s)
3135 unsigned char *p = &s->s3->rrec.data[0], *pl;
3136 unsigned short hbtype;
3137 unsigned int payload;
3138 unsigned int padding = 16; /* Use minimum padding */
3140 /* Read type and payload length first */
3145 if (s->msg_callback)
3146 s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT,
3147 &s->s3->rrec.data[0], s->s3->rrec.length,
3148 s, s->msg_callback_arg);
3150 if (hbtype == TLS1_HB_REQUEST)
3152 unsigned char *buffer, *bp;
3155 /* Allocate memory for the response, size is 1 bytes
3156 * message type, plus 2 bytes payload length, plus
3157 * payload, plus padding
3159 buffer = OPENSSL_malloc(1 + 2 + payload + padding);
3162 /* Enter response type, length and copy payload */
3163 *bp++ = TLS1_HB_RESPONSE;
3165 memcpy(bp, pl, payload);
3167 /* Random padding */
3168 RAND_pseudo_bytes(bp, padding);
3170 r = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buffer, 3 + payload + padding);
3172 if (r >= 0 && s->msg_callback)
3173 s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
3174 buffer, 3 + payload + padding,
3175 s, s->msg_callback_arg);
3177 OPENSSL_free(buffer);
3182 else if (hbtype == TLS1_HB_RESPONSE)
3186 /* We only send sequence numbers (2 bytes unsigned int),
3187 * and 16 random bytes, so we just try to read the
3188 * sequence number */
3191 if (payload == 18 && seq == s->tlsext_hb_seq)
3194 s->tlsext_hb_pending = 0;
3202 tls1_heartbeat(SSL *s)
3204 unsigned char *buf, *p;
3206 unsigned int payload = 18; /* Sequence number + random bytes */
3207 unsigned int padding = 16; /* Use minimum padding */
3209 /* Only send if peer supports and accepts HB requests... */
3210 if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) ||
3211 s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS)
3213 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
3217 /* ...and there is none in flight yet... */
3218 if (s->tlsext_hb_pending)
3220 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PENDING);
3224 /* ...and no handshake in progress. */
3225 if (SSL_in_init(s) || s->in_handshake)
3227 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_UNEXPECTED_MESSAGE);
3231 /* Check if padding is too long, payload and padding
3232 * must not exceed 2^14 - 3 = 16381 bytes in total.
3234 OPENSSL_assert(payload + padding <= 16381);
3236 /* Create HeartBeat message, we just use a sequence number
3237 * as payload to distuingish different messages and add
3238 * some random stuff.
3239 * - Message Type, 1 byte
3240 * - Payload Length, 2 bytes (unsigned int)
3241 * - Payload, the sequence number (2 bytes uint)
3242 * - Payload, random bytes (16 bytes uint)
3245 buf = OPENSSL_malloc(1 + 2 + payload + padding);
3248 *p++ = TLS1_HB_REQUEST;
3249 /* Payload length (18 bytes here) */
3251 /* Sequence number */
3252 s2n(s->tlsext_hb_seq, p);
3253 /* 16 random bytes */
3254 RAND_pseudo_bytes(p, 16);
3256 /* Random padding */
3257 RAND_pseudo_bytes(p, padding);
3259 ret = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding);
3262 if (s->msg_callback)
3263 s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
3264 buf, 3 + payload + padding,
3265 s, s->msg_callback_arg);
3267 s->tlsext_hb_pending = 1;
3276 #define MAX_SIGALGLEN (TLSEXT_hash_num * TLSEXT_signature_num * 2)
3281 int sigalgs[MAX_SIGALGLEN];
3284 static int sig_cb(const char *elem, int len, void *arg)
3286 sig_cb_st *sarg = arg;
3289 int sig_alg, hash_alg;
3290 if (sarg->sigalgcnt == MAX_SIGALGLEN)
3292 if (len > (int)(sizeof(etmp) - 1))
3294 memcpy(etmp, elem, len);
3296 p = strchr(etmp, '+');
3304 if (!strcmp(etmp, "RSA"))
3305 sig_alg = EVP_PKEY_RSA;
3306 else if (!strcmp(etmp, "DSA"))
3307 sig_alg = EVP_PKEY_DSA;
3308 else if (!strcmp(etmp, "ECDSA"))
3309 sig_alg = EVP_PKEY_EC;
3312 hash_alg = OBJ_sn2nid(p);
3313 if (hash_alg == NID_undef)
3314 hash_alg = OBJ_ln2nid(p);
3315 if (hash_alg == NID_undef)
3318 for (i = 0; i < sarg->sigalgcnt; i+=2)
3320 if (sarg->sigalgs[i] == sig_alg
3321 && sarg->sigalgs[i + 1] == hash_alg)
3324 sarg->sigalgs[sarg->sigalgcnt++] = hash_alg;
3325 sarg->sigalgs[sarg->sigalgcnt++] = sig_alg;
3329 /* Set suppored signature algorithms based on a colon separated list
3330 * of the form sig+hash e.g. RSA+SHA512:DSA+SHA512 */
3331 int tls1_set_sigalgs_list(CERT *c, const char *str)
3335 if (!CONF_parse_list(str, ':', 1, sig_cb, &sig))
3337 return tls1_set_sigalgs(c, sig.sigalgs, sig.sigalgcnt);
3340 int tls1_set_sigalgs(CERT *c, const int *psig_nids, size_t salglen)
3342 unsigned char *sigalgs, *sptr;
3347 sigalgs = OPENSSL_malloc(salglen);
3348 if (sigalgs == NULL)
3350 for (i = 0, sptr = sigalgs; i < salglen; i+=2)
3352 rhash = tls12_find_id(*psig_nids++, tls12_md,
3353 sizeof(tls12_md)/sizeof(tls12_lookup));
3354 rsign = tls12_find_id(*psig_nids++, tls12_sig,
3355 sizeof(tls12_sig)/sizeof(tls12_lookup));
3357 if (rhash == -1 || rsign == -1)
3363 if (c->conf_sigalgs)
3364 OPENSSL_free(c->conf_sigalgs);
3366 c->conf_sigalgs = sigalgs;
3367 c->conf_sigalgslen = salglen;
3371 OPENSSL_free(sigalgs);
3375 static int tls1_check_sig_alg(CERT *c, X509 *x, int default_nid)
3379 if (default_nid == -1)
3381 sig_nid = X509_get_signature_nid(x);
3383 return sig_nid == default_nid ? 1 : 0;
3384 for (i = 0; i < c->shared_sigalgslen; i++)
3385 if (sig_nid == c->shared_sigalgs[i].signandhash_nid)
3390 /* Check certificate chain is consistent with TLS extensions and is
3393 int tls1_check_chain(SSL *s, X509 *x, EVP_PKEY *pk, STACK_OF(X509) *chain,
3397 int rv = CERT_PKEY_INVALID;
3398 CERT_PKEY *cpk = NULL;
3402 cpk = c->pkeys + idx;
3404 pk = cpk->privatekey;
3406 /* If no cert or key, forget it */
3412 idx = ssl_cert_type(x, pk);
3417 /* Check all signature algorithms are consistent with
3418 * signature algorithms extension if TLS 1.2 or later
3421 if (TLS1_get_version(s) >= TLS1_2_VERSION
3422 && c->cert_flags & SSL_CERT_FLAG_TLS_STRICT)
3425 unsigned char rsign = 0;
3426 if (c->peer_sigalgs)
3428 /* If no sigalgs extension use defaults from RFC5246 */
3433 case SSL_PKEY_RSA_ENC:
3434 case SSL_PKEY_RSA_SIGN:
3435 case SSL_PKEY_DH_RSA:
3436 rsign = TLSEXT_signature_rsa;
3437 default_nid = NID_sha1WithRSAEncryption;
3440 case SSL_PKEY_DSA_SIGN:
3441 case SSL_PKEY_DH_DSA:
3442 rsign = TLSEXT_signature_dsa;
3443 default_nid = NID_dsaWithSHA1;
3447 rsign = TLSEXT_signature_ecdsa;
3448 default_nid = NID_ecdsa_with_SHA1;
3456 /* If peer sent no signature algorithms extension and we
3457 * have set preferred signature algorithms check we support
3460 if (default_nid > 0 && c->conf_sigalgs)
3463 const unsigned char *p = c->conf_sigalgs;
3464 for (j = 0; j < c->conf_sigalgslen; j += 2, p += 2)
3466 if (p[0] == TLSEXT_hash_sha1 && p[1] == rsign)
3469 if (j == c->conf_sigalgslen)
3472 /* Check signature algorithm of each cert in chain */
3473 if (!tls1_check_sig_alg(c, x, default_nid))
3475 for (i = 0; i < sk_X509_num(chain); i++)
3477 if (!tls1_check_sig_alg(c, sk_X509_value(chain, i),
3483 /* Check cert parameters are consistent */
3484 if (!tls1_check_cert_param(s, x))
3486 /* In strict mode check rest of chain too */
3487 if (c->cert_flags & SSL_CERT_FLAG_TLS_STRICT)
3489 for (i = 0; i < sk_X509_num(chain); i++)
3491 if (!tls1_check_cert_param(s, sk_X509_value(chain, i)))
3495 rv = CERT_PKEY_VALID;
3500 if (rv && cpk->digest)
3501 rv |= CERT_PKEY_SIGN;
3502 cpk->valid_flags = rv;
3507 /* Set validity of certificates in an SSL structure */
3508 void tls1_set_cert_validity(SSL *s)
3510 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_ENC);
3511 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_RSA_SIGN);
3512 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DSA_SIGN);
3513 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DH_RSA);
3514 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_DH_DSA);
3515 tls1_check_chain(s, NULL, NULL, NULL, SSL_PKEY_ECC);