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);
128 SSL3_ENC_METHOD TLSv1_enc_data={
131 tls1_setup_key_block,
132 tls1_generate_master_secret,
133 tls1_change_cipher_state,
134 tls1_final_finish_mac,
135 TLS1_FINISH_MAC_LENGTH,
136 tls1_cert_verify_mac,
137 TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
138 TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
140 tls1_export_keying_material,
143 long tls1_default_timeout(void)
145 /* 2 hours, the 24 hours mentioned in the TLSv1 spec
146 * is way too long for http, the cache would over fill */
152 if (!ssl3_new(s)) return(0);
153 s->method->ssl_clear(s);
157 void tls1_free(SSL *s)
159 #ifndef OPENSSL_NO_TLSEXT
160 if (s->tlsext_session_ticket)
162 OPENSSL_free(s->tlsext_session_ticket);
164 #endif /* OPENSSL_NO_TLSEXT */
168 void tls1_clear(SSL *s)
171 s->version = s->method->version;
174 #ifndef OPENSSL_NO_EC
176 static int nid_list[] =
178 NID_sect163k1, /* sect163k1 (1) */
179 NID_sect163r1, /* sect163r1 (2) */
180 NID_sect163r2, /* sect163r2 (3) */
181 NID_sect193r1, /* sect193r1 (4) */
182 NID_sect193r2, /* sect193r2 (5) */
183 NID_sect233k1, /* sect233k1 (6) */
184 NID_sect233r1, /* sect233r1 (7) */
185 NID_sect239k1, /* sect239k1 (8) */
186 NID_sect283k1, /* sect283k1 (9) */
187 NID_sect283r1, /* sect283r1 (10) */
188 NID_sect409k1, /* sect409k1 (11) */
189 NID_sect409r1, /* sect409r1 (12) */
190 NID_sect571k1, /* sect571k1 (13) */
191 NID_sect571r1, /* sect571r1 (14) */
192 NID_secp160k1, /* secp160k1 (15) */
193 NID_secp160r1, /* secp160r1 (16) */
194 NID_secp160r2, /* secp160r2 (17) */
195 NID_secp192k1, /* secp192k1 (18) */
196 NID_X9_62_prime192v1, /* secp192r1 (19) */
197 NID_secp224k1, /* secp224k1 (20) */
198 NID_secp224r1, /* secp224r1 (21) */
199 NID_secp256k1, /* secp256k1 (22) */
200 NID_X9_62_prime256v1, /* secp256r1 (23) */
201 NID_secp384r1, /* secp384r1 (24) */
202 NID_secp521r1 /* secp521r1 (25) */
205 static int pref_list[] =
207 NID_sect571r1, /* sect571r1 (14) */
208 NID_sect571k1, /* sect571k1 (13) */
209 NID_secp521r1, /* secp521r1 (25) */
210 NID_sect409k1, /* sect409k1 (11) */
211 NID_sect409r1, /* sect409r1 (12) */
212 NID_secp384r1, /* secp384r1 (24) */
213 NID_sect283k1, /* sect283k1 (9) */
214 NID_sect283r1, /* sect283r1 (10) */
215 NID_secp256k1, /* secp256k1 (22) */
216 NID_X9_62_prime256v1, /* secp256r1 (23) */
217 NID_sect239k1, /* sect239k1 (8) */
218 NID_sect233k1, /* sect233k1 (6) */
219 NID_sect233r1, /* sect233r1 (7) */
220 NID_secp224k1, /* secp224k1 (20) */
221 NID_secp224r1, /* secp224r1 (21) */
222 NID_sect193r1, /* sect193r1 (4) */
223 NID_sect193r2, /* sect193r2 (5) */
224 NID_secp192k1, /* secp192k1 (18) */
225 NID_X9_62_prime192v1, /* secp192r1 (19) */
226 NID_sect163k1, /* sect163k1 (1) */
227 NID_sect163r1, /* sect163r1 (2) */
228 NID_sect163r2, /* sect163r2 (3) */
229 NID_secp160k1, /* secp160k1 (15) */
230 NID_secp160r1, /* secp160r1 (16) */
231 NID_secp160r2, /* secp160r2 (17) */
234 int tls1_ec_curve_id2nid(int curve_id)
236 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
237 if ((curve_id < 1) || ((unsigned int)curve_id >
238 sizeof(nid_list)/sizeof(nid_list[0])))
240 return nid_list[curve_id-1];
243 int tls1_ec_nid2curve_id(int nid)
245 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
248 case NID_sect163k1: /* sect163k1 (1) */
250 case NID_sect163r1: /* sect163r1 (2) */
252 case NID_sect163r2: /* sect163r2 (3) */
254 case NID_sect193r1: /* sect193r1 (4) */
256 case NID_sect193r2: /* sect193r2 (5) */
258 case NID_sect233k1: /* sect233k1 (6) */
260 case NID_sect233r1: /* sect233r1 (7) */
262 case NID_sect239k1: /* sect239k1 (8) */
264 case NID_sect283k1: /* sect283k1 (9) */
266 case NID_sect283r1: /* sect283r1 (10) */
268 case NID_sect409k1: /* sect409k1 (11) */
270 case NID_sect409r1: /* sect409r1 (12) */
272 case NID_sect571k1: /* sect571k1 (13) */
274 case NID_sect571r1: /* sect571r1 (14) */
276 case NID_secp160k1: /* secp160k1 (15) */
278 case NID_secp160r1: /* secp160r1 (16) */
280 case NID_secp160r2: /* secp160r2 (17) */
282 case NID_secp192k1: /* secp192k1 (18) */
284 case NID_X9_62_prime192v1: /* secp192r1 (19) */
286 case NID_secp224k1: /* secp224k1 (20) */
288 case NID_secp224r1: /* secp224r1 (21) */
290 case NID_secp256k1: /* secp256k1 (22) */
292 case NID_X9_62_prime256v1: /* secp256r1 (23) */
294 case NID_secp384r1: /* secp384r1 (24) */
296 case NID_secp521r1: /* secp521r1 (25) */
302 #endif /* OPENSSL_NO_EC */
304 #ifndef OPENSSL_NO_TLSEXT
306 /* List of supported signature algorithms and hashes. Should make this
307 * customisable at some point, for now include everything we support.
310 #ifdef OPENSSL_NO_RSA
311 #define tlsext_sigalg_rsa(md) /* */
313 #define tlsext_sigalg_rsa(md) md, TLSEXT_signature_rsa,
316 #ifdef OPENSSL_NO_DSA
317 #define tlsext_sigalg_dsa(md) /* */
319 #define tlsext_sigalg_dsa(md) md, TLSEXT_signature_dsa,
322 #ifdef OPENSSL_NO_ECDSA
323 #define tlsext_sigalg_ecdsa(md) /* */
325 #define tlsext_sigalg_ecdsa(md) md, TLSEXT_signature_ecdsa,
328 #define tlsext_sigalg(md) \
329 tlsext_sigalg_rsa(md) \
330 tlsext_sigalg_dsa(md) \
331 tlsext_sigalg_ecdsa(md)
333 static unsigned char tls12_sigalgs[] = {
334 #ifndef OPENSSL_NO_SHA512
335 tlsext_sigalg(TLSEXT_hash_sha512)
336 tlsext_sigalg(TLSEXT_hash_sha384)
338 #ifndef OPENSSL_NO_SHA256
339 tlsext_sigalg(TLSEXT_hash_sha256)
340 tlsext_sigalg(TLSEXT_hash_sha224)
342 #ifndef OPENSSL_NO_SHA
343 tlsext_sigalg(TLSEXT_hash_sha1)
345 #ifndef OPENSSL_NO_MD5
346 tlsext_sigalg_rsa(TLSEXT_hash_md5)
350 int tls12_get_req_sig_algs(SSL *s, unsigned char *p)
352 size_t slen = sizeof(tls12_sigalgs);
354 /* If FIPS mode don't include MD5 which is last */
359 memcpy(p, tls12_sigalgs, slen);
363 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
366 unsigned char *ret = p;
368 /* don't add extensions for SSLv3 unless doing secure renegotiation */
369 if (s->client_version == SSL3_VERSION
370 && !s->s3->send_connection_binding)
375 if (ret>=limit) return NULL; /* this really never occurs, but ... */
377 if (s->tlsext_hostname != NULL)
379 /* Add TLS extension servername to the Client Hello message */
380 unsigned long size_str;
383 /* check for enough space.
384 4 for the servername type and entension length
385 2 for servernamelist length
386 1 for the hostname type
387 2 for hostname length
391 if ((lenmax = limit - ret - 9) < 0
392 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
395 /* extension type and length */
396 s2n(TLSEXT_TYPE_server_name,ret);
399 /* length of servername list */
402 /* hostname type, length and hostname */
403 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
405 memcpy(ret, s->tlsext_hostname, size_str);
409 /* Add RI if renegotiating */
414 if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
416 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
420 if((limit - p - 4 - el) < 0) return NULL;
422 s2n(TLSEXT_TYPE_renegotiate,ret);
425 if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
427 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
434 #ifndef OPENSSL_NO_SRP
435 #define MIN(x,y) (((x)<(y))?(x):(y))
436 /* we add SRP username the first time only if we have one! */
437 if (s->srp_ctx.login != NULL)
438 {/* Add TLS extension SRP username to the Client Hello message */
439 int login_len = MIN(strlen(s->srp_ctx.login) + 1, 255);
442 if ((lenmax = limit - ret - 5) < 0) return NULL;
443 if (login_len > lenmax) return NULL;
446 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
449 s2n(TLSEXT_TYPE_srp,ret);
450 s2n(login_len+1,ret);
452 (*ret++) = (unsigned char) MIN(strlen(s->srp_ctx.login), 254);
453 memcpy(ret, s->srp_ctx.login, MIN(strlen(s->srp_ctx.login), 254));
458 #ifndef OPENSSL_NO_EC
459 if (s->tlsext_ecpointformatlist != NULL &&
460 s->version != DTLS1_VERSION)
462 /* Add TLS extension ECPointFormats to the ClientHello message */
465 if ((lenmax = limit - ret - 5) < 0) return NULL;
466 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
467 if (s->tlsext_ecpointformatlist_length > 255)
469 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
473 s2n(TLSEXT_TYPE_ec_point_formats,ret);
474 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
475 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
476 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
477 ret+=s->tlsext_ecpointformatlist_length;
479 if (s->tlsext_ellipticcurvelist != NULL &&
480 s->version != DTLS1_VERSION)
482 /* Add TLS extension EllipticCurves to the ClientHello message */
485 if ((lenmax = limit - ret - 6) < 0) return NULL;
486 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
487 if (s->tlsext_ellipticcurvelist_length > 65532)
489 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
493 s2n(TLSEXT_TYPE_elliptic_curves,ret);
494 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
496 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
497 * elliptic_curve_list, but the examples use two bytes.
498 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
499 * resolves this to two bytes.
501 s2n(s->tlsext_ellipticcurvelist_length, ret);
502 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
503 ret+=s->tlsext_ellipticcurvelist_length;
505 #endif /* OPENSSL_NO_EC */
507 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
510 if (!s->new_session && s->session && s->session->tlsext_tick)
511 ticklen = s->session->tlsext_ticklen;
512 else if (s->session && s->tlsext_session_ticket &&
513 s->tlsext_session_ticket->data)
515 ticklen = s->tlsext_session_ticket->length;
516 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
517 if (!s->session->tlsext_tick)
519 memcpy(s->session->tlsext_tick,
520 s->tlsext_session_ticket->data,
522 s->session->tlsext_ticklen = ticklen;
526 if (ticklen == 0 && s->tlsext_session_ticket &&
527 s->tlsext_session_ticket->data == NULL)
529 /* Check for enough room 2 for extension type, 2 for len
532 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
533 s2n(TLSEXT_TYPE_session_ticket,ret);
537 memcpy(ret, s->session->tlsext_tick, ticklen);
543 if (TLS1_get_version(s) >= TLS1_2_VERSION)
545 if ((size_t)(limit - ret) < sizeof(tls12_sigalgs) + 6)
547 s2n(TLSEXT_TYPE_signature_algorithms,ret);
548 s2n(sizeof(tls12_sigalgs) + 2, ret);
549 s2n(sizeof(tls12_sigalgs), ret);
550 memcpy(ret, tls12_sigalgs, sizeof(tls12_sigalgs));
551 ret += sizeof(tls12_sigalgs);
554 #ifdef TLSEXT_TYPE_opaque_prf_input
555 if (s->s3->client_opaque_prf_input != NULL &&
556 s->version != DTLS1_VERSION)
558 size_t col = s->s3->client_opaque_prf_input_len;
560 if ((long)(limit - ret - 6 - col < 0))
562 if (col > 0xFFFD) /* can't happen */
565 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
568 memcpy(ret, s->s3->client_opaque_prf_input, col);
573 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
574 s->version != DTLS1_VERSION)
577 long extlen, idlen, itmp;
581 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
583 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
584 itmp = i2d_OCSP_RESPID(id, NULL);
590 if (s->tlsext_ocsp_exts)
592 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
599 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
600 s2n(TLSEXT_TYPE_status_request, ret);
601 if (extlen + idlen > 0xFFF0)
603 s2n(extlen + idlen + 5, ret);
604 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
606 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
608 /* save position of id len */
609 unsigned char *q = ret;
610 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
611 /* skip over id len */
613 itmp = i2d_OCSP_RESPID(id, &ret);
619 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
622 #ifndef OPENSSL_NO_HEARTBEATS
623 /* Add Heartbeat extension */
624 s2n(TLSEXT_TYPE_heartbeat,ret);
627 * 1: peer may send requests
628 * 2: peer not allowed to send requests
630 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
631 *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
633 *(ret++) = SSL_TLSEXT_HB_ENABLED;
636 #ifndef OPENSSL_NO_NEXTPROTONEG
637 if (s->ctx->next_proto_select_cb && !s->s3->tmp.finish_md_len)
639 /* The client advertises an emtpy extension to indicate its
640 * support for Next Protocol Negotiation */
641 if (limit - ret - 4 < 0)
643 s2n(TLSEXT_TYPE_next_proto_neg,ret);
648 if(SSL_get_srtp_profiles(s))
652 ssl_add_clienthello_use_srtp_ext(s, 0, &el, 0);
654 if((limit - p - 4 - el) < 0) return NULL;
656 s2n(TLSEXT_TYPE_use_srtp,ret);
659 if(ssl_add_clienthello_use_srtp_ext(s, ret, &el, el))
661 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
667 if ((extdatalen = ret-p-2)== 0)
674 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
677 unsigned char *ret = p;
678 #ifndef OPENSSL_NO_NEXTPROTONEG
679 int next_proto_neg_seen;
682 /* don't add extensions for SSLv3, unless doing secure renegotiation */
683 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
687 if (ret>=limit) return NULL; /* this really never occurs, but ... */
689 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
691 if ((long)(limit - ret - 4) < 0) return NULL;
693 s2n(TLSEXT_TYPE_server_name,ret);
697 if(s->s3->send_connection_binding)
701 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
703 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
707 if((limit - p - 4 - el) < 0) return NULL;
709 s2n(TLSEXT_TYPE_renegotiate,ret);
712 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
714 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
721 #ifndef OPENSSL_NO_EC
722 if (s->tlsext_ecpointformatlist != NULL &&
723 s->version != DTLS1_VERSION)
725 /* Add TLS extension ECPointFormats to the ServerHello message */
728 if ((lenmax = limit - ret - 5) < 0) return NULL;
729 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
730 if (s->tlsext_ecpointformatlist_length > 255)
732 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
736 s2n(TLSEXT_TYPE_ec_point_formats,ret);
737 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
738 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
739 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
740 ret+=s->tlsext_ecpointformatlist_length;
743 /* Currently the server should not respond with a SupportedCurves extension */
744 #endif /* OPENSSL_NO_EC */
746 if (s->tlsext_ticket_expected
747 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
749 if ((long)(limit - ret - 4) < 0) return NULL;
750 s2n(TLSEXT_TYPE_session_ticket,ret);
754 if (s->tlsext_status_expected)
756 if ((long)(limit - ret - 4) < 0) return NULL;
757 s2n(TLSEXT_TYPE_status_request,ret);
761 #ifdef TLSEXT_TYPE_opaque_prf_input
762 if (s->s3->server_opaque_prf_input != NULL &&
763 s->version != DTLS1_VERSION)
765 size_t sol = s->s3->server_opaque_prf_input_len;
767 if ((long)(limit - ret - 6 - sol) < 0)
769 if (sol > 0xFFFD) /* can't happen */
772 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
775 memcpy(ret, s->s3->server_opaque_prf_input, sol);
784 ssl_add_serverhello_use_srtp_ext(s, 0, &el, 0);
786 if((limit - p - 4 - el) < 0) return NULL;
788 s2n(TLSEXT_TYPE_use_srtp,ret);
791 if(ssl_add_serverhello_use_srtp_ext(s, ret, &el, el))
793 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
799 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
800 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
801 { const unsigned char cryptopro_ext[36] = {
802 0xfd, 0xe8, /*65000*/
803 0x00, 0x20, /*32 bytes length*/
804 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
805 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
806 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
807 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
808 if (limit-ret<36) return NULL;
809 memcpy(ret,cryptopro_ext,36);
814 #ifndef OPENSSL_NO_HEARTBEATS
815 /* Add Heartbeat extension if we've received one */
816 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED)
818 s2n(TLSEXT_TYPE_heartbeat,ret);
821 * 1: peer may send requests
822 * 2: peer not allowed to send requests
824 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
825 *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
827 *(ret++) = SSL_TLSEXT_HB_ENABLED;
832 #ifndef OPENSSL_NO_NEXTPROTONEG
833 next_proto_neg_seen = s->s3->next_proto_neg_seen;
834 s->s3->next_proto_neg_seen = 0;
835 if (next_proto_neg_seen && s->ctx->next_protos_advertised_cb)
837 const unsigned char *npa;
841 r = s->ctx->next_protos_advertised_cb(s, &npa, &npalen, s->ctx->next_protos_advertised_cb_arg);
842 if (r == SSL_TLSEXT_ERR_OK)
844 if ((long)(limit - ret - 4 - npalen) < 0) return NULL;
845 s2n(TLSEXT_TYPE_next_proto_neg,ret);
847 memcpy(ret, npa, npalen);
849 s->s3->next_proto_neg_seen = 1;
854 if ((extdatalen = ret-p-2)== 0)
861 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
866 unsigned char *data = *p;
867 int renegotiate_seen = 0;
870 s->servername_done = 0;
871 s->tlsext_status_type = -1;
872 #ifndef OPENSSL_NO_NEXTPROTONEG
873 s->s3->next_proto_neg_seen = 0;
876 #ifndef OPENSSL_NO_HEARTBEATS
877 s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
878 SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
885 if (data > (d+n-len))
888 while (data <= (d+n-4))
893 if (data+size > (d+n))
896 fprintf(stderr,"Received extension type %d size %d\n",type,size);
898 if (s->tlsext_debug_cb)
899 s->tlsext_debug_cb(s, 0, type, data, size,
900 s->tlsext_debug_arg);
901 /* The servername extension is treated as follows:
903 - Only the hostname type is supported with a maximum length of 255.
904 - The servername is rejected if too long or if it contains zeros,
905 in which case an fatal alert is generated.
906 - The servername field is maintained together with the session cache.
907 - When a session is resumed, the servername call back invoked in order
908 to allow the application to position itself to the right context.
909 - The servername is acknowledged if it is new for a session or when
910 it is identical to a previously used for the same session.
911 Applications can control the behaviour. They can at any time
912 set a 'desirable' servername for a new SSL object. This can be the
913 case for example with HTTPS when a Host: header field is received and
914 a renegotiation is requested. In this case, a possible servername
915 presented in the new client hello is only acknowledged if it matches
916 the value of the Host: field.
917 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
918 if they provide for changing an explicit servername context for the session,
919 i.e. when the session has been established with a servername extension.
920 - On session reconnect, the servername extension may be absent.
924 if (type == TLSEXT_TYPE_server_name)
926 unsigned char *sdata;
932 *al = SSL_AD_DECODE_ERROR;
939 *al = SSL_AD_DECODE_ERROR;
946 servname_type = *(sdata++);
952 *al = SSL_AD_DECODE_ERROR;
955 if (s->servername_done == 0)
956 switch (servname_type)
958 case TLSEXT_NAMETYPE_host_name:
961 if(s->session->tlsext_hostname)
963 *al = SSL_AD_DECODE_ERROR;
966 if (len > TLSEXT_MAXLEN_host_name)
968 *al = TLS1_AD_UNRECOGNIZED_NAME;
971 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
973 *al = TLS1_AD_INTERNAL_ERROR;
976 memcpy(s->session->tlsext_hostname, sdata, len);
977 s->session->tlsext_hostname[len]='\0';
978 if (strlen(s->session->tlsext_hostname) != len) {
979 OPENSSL_free(s->session->tlsext_hostname);
980 s->session->tlsext_hostname = NULL;
981 *al = TLS1_AD_UNRECOGNIZED_NAME;
984 s->servername_done = 1;
988 s->servername_done = s->session->tlsext_hostname
989 && strlen(s->session->tlsext_hostname) == len
990 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
1002 *al = SSL_AD_DECODE_ERROR;
1007 #ifndef OPENSSL_NO_SRP
1008 else if (type == TLSEXT_TYPE_srp)
1013 if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
1015 memcpy(s->srp_ctx.login, &data[1], len);
1016 s->srp_ctx.login[len]='\0';
1021 #ifndef OPENSSL_NO_EC
1022 else if (type == TLSEXT_TYPE_ec_point_formats &&
1023 s->version != DTLS1_VERSION)
1025 unsigned char *sdata = data;
1026 int ecpointformatlist_length = *(sdata++);
1028 if (ecpointformatlist_length != size - 1)
1030 *al = TLS1_AD_DECODE_ERROR;
1035 if(s->session->tlsext_ecpointformatlist)
1037 OPENSSL_free(s->session->tlsext_ecpointformatlist);
1038 s->session->tlsext_ecpointformatlist = NULL;
1040 s->session->tlsext_ecpointformatlist_length = 0;
1041 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1043 *al = TLS1_AD_INTERNAL_ERROR;
1046 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1047 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1050 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
1051 sdata = s->session->tlsext_ecpointformatlist;
1052 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1053 fprintf(stderr,"%i ",*(sdata++));
1054 fprintf(stderr,"\n");
1057 else if (type == TLSEXT_TYPE_elliptic_curves &&
1058 s->version != DTLS1_VERSION)
1060 unsigned char *sdata = data;
1061 int ellipticcurvelist_length = (*(sdata++) << 8);
1062 ellipticcurvelist_length += (*(sdata++));
1064 if (ellipticcurvelist_length != size - 2)
1066 *al = TLS1_AD_DECODE_ERROR;
1071 if(s->session->tlsext_ellipticcurvelist)
1073 *al = TLS1_AD_DECODE_ERROR;
1076 s->session->tlsext_ellipticcurvelist_length = 0;
1077 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
1079 *al = TLS1_AD_INTERNAL_ERROR;
1082 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
1083 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
1086 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
1087 sdata = s->session->tlsext_ellipticcurvelist;
1088 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
1089 fprintf(stderr,"%i ",*(sdata++));
1090 fprintf(stderr,"\n");
1093 #endif /* OPENSSL_NO_EC */
1094 #ifdef TLSEXT_TYPE_opaque_prf_input
1095 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1096 s->version != DTLS1_VERSION)
1098 unsigned char *sdata = data;
1102 *al = SSL_AD_DECODE_ERROR;
1105 n2s(sdata, s->s3->client_opaque_prf_input_len);
1106 if (s->s3->client_opaque_prf_input_len != size - 2)
1108 *al = SSL_AD_DECODE_ERROR;
1112 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1113 OPENSSL_free(s->s3->client_opaque_prf_input);
1114 if (s->s3->client_opaque_prf_input_len == 0)
1115 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1117 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
1118 if (s->s3->client_opaque_prf_input == NULL)
1120 *al = TLS1_AD_INTERNAL_ERROR;
1125 else if (type == TLSEXT_TYPE_session_ticket)
1127 if (s->tls_session_ticket_ext_cb &&
1128 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1130 *al = TLS1_AD_INTERNAL_ERROR;
1134 else if (type == TLSEXT_TYPE_renegotiate)
1136 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
1138 renegotiate_seen = 1;
1140 else if (type == TLSEXT_TYPE_signature_algorithms)
1143 if (sigalg_seen || size < 2)
1145 *al = SSL_AD_DECODE_ERROR;
1151 if (dsize != size || dsize & 1)
1153 *al = SSL_AD_DECODE_ERROR;
1156 if (!tls1_process_sigalgs(s, data, dsize))
1158 *al = SSL_AD_DECODE_ERROR;
1162 else if (type == TLSEXT_TYPE_status_request &&
1163 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
1168 *al = SSL_AD_DECODE_ERROR;
1172 s->tlsext_status_type = *data++;
1174 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
1176 const unsigned char *sdata;
1178 /* Read in responder_id_list */
1183 *al = SSL_AD_DECODE_ERROR;
1192 *al = SSL_AD_DECODE_ERROR;
1196 dsize -= 2 + idsize;
1200 *al = SSL_AD_DECODE_ERROR;
1205 id = d2i_OCSP_RESPID(NULL,
1209 *al = SSL_AD_DECODE_ERROR;
1214 OCSP_RESPID_free(id);
1215 *al = SSL_AD_DECODE_ERROR;
1218 if (!s->tlsext_ocsp_ids
1219 && !(s->tlsext_ocsp_ids =
1220 sk_OCSP_RESPID_new_null()))
1222 OCSP_RESPID_free(id);
1223 *al = SSL_AD_INTERNAL_ERROR;
1226 if (!sk_OCSP_RESPID_push(
1227 s->tlsext_ocsp_ids, id))
1229 OCSP_RESPID_free(id);
1230 *al = SSL_AD_INTERNAL_ERROR;
1235 /* Read in request_extensions */
1238 *al = SSL_AD_DECODE_ERROR;
1245 *al = SSL_AD_DECODE_ERROR;
1251 if (s->tlsext_ocsp_exts)
1253 sk_X509_EXTENSION_pop_free(s->tlsext_ocsp_exts,
1254 X509_EXTENSION_free);
1257 s->tlsext_ocsp_exts =
1258 d2i_X509_EXTENSIONS(NULL,
1260 if (!s->tlsext_ocsp_exts
1261 || (data + dsize != sdata))
1263 *al = SSL_AD_DECODE_ERROR;
1268 /* We don't know what to do with any other type
1272 s->tlsext_status_type = -1;
1274 #ifndef OPENSSL_NO_HEARTBEATS
1275 else if (type == TLSEXT_TYPE_heartbeat)
1279 case 0x01: /* Client allows us to send HB requests */
1280 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1282 case 0x02: /* Client doesn't accept HB requests */
1283 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1284 s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
1286 default: *al = SSL_AD_ILLEGAL_PARAMETER;
1291 #ifndef OPENSSL_NO_NEXTPROTONEG
1292 else if (type == TLSEXT_TYPE_next_proto_neg &&
1293 s->s3->tmp.finish_md_len == 0)
1295 /* We shouldn't accept this extension on a
1298 * s->new_session will be set on renegotiation, but we
1299 * probably shouldn't rely that it couldn't be set on
1300 * the initial renegotation too in certain cases (when
1301 * there's some other reason to disallow resuming an
1302 * earlier session -- the current code won't be doing
1303 * anything like that, but this might change).
1305 * A valid sign that there's been a previous handshake
1306 * in this connection is if s->s3->tmp.finish_md_len >
1307 * 0. (We are talking about a check that will happen
1308 * in the Hello protocol round, well before a new
1309 * Finished message could have been computed.) */
1310 s->s3->next_proto_neg_seen = 1;
1314 /* session ticket processed earlier */
1315 else if (type == TLSEXT_TYPE_use_srtp)
1317 if(ssl_parse_clienthello_use_srtp_ext(s, data, size,
1329 /* Need RI if renegotiating */
1331 if (!renegotiate_seen && s->renegotiate &&
1332 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1334 *al = SSL_AD_HANDSHAKE_FAILURE;
1335 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
1336 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1343 #ifndef OPENSSL_NO_NEXTPROTONEG
1344 /* ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1345 * elements of zero length are allowed and the set of elements must exactly fill
1346 * the length of the block. */
1347 static char ssl_next_proto_validate(unsigned char *d, unsigned len)
1349 unsigned int off = 0;
1363 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1365 unsigned short length;
1366 unsigned short type;
1367 unsigned short size;
1368 unsigned char *data = *p;
1369 int tlsext_servername = 0;
1370 int renegotiate_seen = 0;
1372 #ifndef OPENSSL_NO_NEXTPROTONEG
1373 s->s3->next_proto_neg_seen = 0;
1376 #ifndef OPENSSL_NO_HEARTBEATS
1377 s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
1378 SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
1381 if (data >= (d+n-2))
1385 if (data+length != d+n)
1387 *al = SSL_AD_DECODE_ERROR;
1391 while(data <= (d+n-4))
1396 if (data+size > (d+n))
1399 if (s->tlsext_debug_cb)
1400 s->tlsext_debug_cb(s, 1, type, data, size,
1401 s->tlsext_debug_arg);
1403 if (type == TLSEXT_TYPE_server_name)
1405 if (s->tlsext_hostname == NULL || size > 0)
1407 *al = TLS1_AD_UNRECOGNIZED_NAME;
1410 tlsext_servername = 1;
1413 #ifndef OPENSSL_NO_EC
1414 else if (type == TLSEXT_TYPE_ec_point_formats &&
1415 s->version != DTLS1_VERSION)
1417 unsigned char *sdata = data;
1418 int ecpointformatlist_length = *(sdata++);
1420 if (ecpointformatlist_length != size - 1)
1422 *al = TLS1_AD_DECODE_ERROR;
1425 s->session->tlsext_ecpointformatlist_length = 0;
1426 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1427 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1429 *al = TLS1_AD_INTERNAL_ERROR;
1432 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1433 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1435 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1436 sdata = s->session->tlsext_ecpointformatlist;
1437 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1438 fprintf(stderr,"%i ",*(sdata++));
1439 fprintf(stderr,"\n");
1442 #endif /* OPENSSL_NO_EC */
1444 else if (type == TLSEXT_TYPE_session_ticket)
1446 if (s->tls_session_ticket_ext_cb &&
1447 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1449 *al = TLS1_AD_INTERNAL_ERROR;
1452 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1455 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1458 s->tlsext_ticket_expected = 1;
1460 #ifdef TLSEXT_TYPE_opaque_prf_input
1461 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1462 s->version != DTLS1_VERSION)
1464 unsigned char *sdata = data;
1468 *al = SSL_AD_DECODE_ERROR;
1471 n2s(sdata, s->s3->server_opaque_prf_input_len);
1472 if (s->s3->server_opaque_prf_input_len != size - 2)
1474 *al = SSL_AD_DECODE_ERROR;
1478 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1479 OPENSSL_free(s->s3->server_opaque_prf_input);
1480 if (s->s3->server_opaque_prf_input_len == 0)
1481 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1483 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1485 if (s->s3->server_opaque_prf_input == NULL)
1487 *al = TLS1_AD_INTERNAL_ERROR;
1492 else if (type == TLSEXT_TYPE_status_request &&
1493 s->version != DTLS1_VERSION)
1495 /* MUST be empty and only sent if we've requested
1496 * a status request message.
1498 if ((s->tlsext_status_type == -1) || (size > 0))
1500 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1503 /* Set flag to expect CertificateStatus message */
1504 s->tlsext_status_expected = 1;
1506 #ifndef OPENSSL_NO_NEXTPROTONEG
1507 else if (type == TLSEXT_TYPE_next_proto_neg &&
1508 s->s3->tmp.finish_md_len == 0)
1510 unsigned char *selected;
1511 unsigned char selected_len;
1513 /* We must have requested it. */
1514 if ((s->ctx->next_proto_select_cb == NULL))
1516 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1519 /* The data must be valid */
1520 if (!ssl_next_proto_validate(data, size))
1522 *al = TLS1_AD_DECODE_ERROR;
1525 if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, data, size, s->ctx->next_proto_select_cb_arg) != SSL_TLSEXT_ERR_OK)
1527 *al = TLS1_AD_INTERNAL_ERROR;
1530 s->next_proto_negotiated = OPENSSL_malloc(selected_len);
1531 if (!s->next_proto_negotiated)
1533 *al = TLS1_AD_INTERNAL_ERROR;
1536 memcpy(s->next_proto_negotiated, selected, selected_len);
1537 s->next_proto_negotiated_len = selected_len;
1538 s->s3->next_proto_neg_seen = 1;
1541 else if (type == TLSEXT_TYPE_renegotiate)
1543 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1545 renegotiate_seen = 1;
1547 #ifndef OPENSSL_NO_HEARTBEATS
1548 else if (type == TLSEXT_TYPE_heartbeat)
1552 case 0x01: /* Server allows us to send HB requests */
1553 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1555 case 0x02: /* Server doesn't accept HB requests */
1556 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1557 s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
1559 default: *al = SSL_AD_ILLEGAL_PARAMETER;
1564 else if (type == TLSEXT_TYPE_use_srtp)
1566 if(ssl_parse_serverhello_use_srtp_ext(s, data, size,
1576 *al = SSL_AD_DECODE_ERROR;
1580 if (!s->hit && tlsext_servername == 1)
1582 if (s->tlsext_hostname)
1584 if (s->session->tlsext_hostname == NULL)
1586 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1587 if (!s->session->tlsext_hostname)
1589 *al = SSL_AD_UNRECOGNIZED_NAME;
1595 *al = SSL_AD_DECODE_ERROR;
1605 /* Determine if we need to see RI. Strictly speaking if we want to
1606 * avoid an attack we should *always* see RI even on initial server
1607 * hello because the client doesn't see any renegotiation during an
1608 * attack. However this would mean we could not connect to any server
1609 * which doesn't support RI so for the immediate future tolerate RI
1610 * absence on initial connect only.
1612 if (!renegotiate_seen
1613 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
1614 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1616 *al = SSL_AD_HANDSHAKE_FAILURE;
1617 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
1618 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1626 int ssl_prepare_clienthello_tlsext(SSL *s)
1628 #ifndef OPENSSL_NO_EC
1629 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1630 * and elliptic curves we support.
1635 unsigned long alg_k, alg_a;
1636 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1638 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1640 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1642 alg_k = c->algorithm_mkey;
1643 alg_a = c->algorithm_auth;
1644 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1650 using_ecc = using_ecc && (s->version >= TLS1_VERSION);
1653 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1654 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1656 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1659 s->tlsext_ecpointformatlist_length = 3;
1660 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1661 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1662 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1664 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1665 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1666 s->tlsext_ellipticcurvelist_length = sizeof(pref_list)/sizeof(pref_list[0]) * 2;
1667 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1669 s->tlsext_ellipticcurvelist_length = 0;
1670 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1673 for (i = 0, j = s->tlsext_ellipticcurvelist; (unsigned int)i <
1674 sizeof(pref_list)/sizeof(pref_list[0]); i++)
1676 int id = tls1_ec_nid2curve_id(pref_list[i]);
1680 #endif /* OPENSSL_NO_EC */
1682 #ifdef TLSEXT_TYPE_opaque_prf_input
1686 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1688 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1693 if (s->tlsext_opaque_prf_input != NULL)
1695 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1696 OPENSSL_free(s->s3->client_opaque_prf_input);
1698 if (s->tlsext_opaque_prf_input_len == 0)
1699 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1701 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1702 if (s->s3->client_opaque_prf_input == NULL)
1704 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1707 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1711 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1712 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1719 int ssl_prepare_serverhello_tlsext(SSL *s)
1721 #ifndef OPENSSL_NO_EC
1722 /* If we are server and using an ECC cipher suite, send the point formats we support
1723 * if the client sent us an ECPointsFormat extension. Note that the server is not
1724 * supposed to send an EllipticCurves extension.
1727 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1728 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1729 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1730 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1734 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1735 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1737 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1740 s->tlsext_ecpointformatlist_length = 3;
1741 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1742 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1743 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1745 #endif /* OPENSSL_NO_EC */
1750 int ssl_check_clienthello_tlsext(SSL *s)
1752 int ret=SSL_TLSEXT_ERR_NOACK;
1753 int al = SSL_AD_UNRECOGNIZED_NAME;
1755 #ifndef OPENSSL_NO_EC
1756 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1757 * ssl3_choose_cipher in s3_lib.c.
1759 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1760 * ssl3_choose_cipher in s3_lib.c.
1764 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1765 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1766 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1767 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1769 /* If status request then ask callback what to do.
1770 * Note: this must be called after servername callbacks in case
1771 * the certificate has changed.
1773 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1776 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1779 /* We don't want to send a status request response */
1780 case SSL_TLSEXT_ERR_NOACK:
1781 s->tlsext_status_expected = 0;
1783 /* status request response should be sent */
1784 case SSL_TLSEXT_ERR_OK:
1785 if (s->tlsext_ocsp_resp)
1786 s->tlsext_status_expected = 1;
1788 s->tlsext_status_expected = 0;
1790 /* something bad happened */
1791 case SSL_TLSEXT_ERR_ALERT_FATAL:
1792 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1793 al = SSL_AD_INTERNAL_ERROR;
1798 s->tlsext_status_expected = 0;
1800 #ifdef TLSEXT_TYPE_opaque_prf_input
1802 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1803 * but we might be sending an alert in response to the client hello,
1804 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1808 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1810 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1813 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1814 al = SSL_AD_INTERNAL_ERROR;
1819 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1820 OPENSSL_free(s->s3->server_opaque_prf_input);
1821 s->s3->server_opaque_prf_input = NULL;
1823 if (s->tlsext_opaque_prf_input != NULL)
1825 if (s->s3->client_opaque_prf_input != NULL &&
1826 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1828 /* can only use this extension if we have a server opaque PRF input
1829 * of the same length as the client opaque PRF input! */
1831 if (s->tlsext_opaque_prf_input_len == 0)
1832 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1834 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1835 if (s->s3->server_opaque_prf_input == NULL)
1837 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1838 al = SSL_AD_INTERNAL_ERROR;
1841 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1845 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1847 /* The callback wants to enforce use of the extension,
1848 * but we can't do that with the client opaque PRF input;
1849 * abort the handshake.
1851 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1852 al = SSL_AD_HANDSHAKE_FAILURE;
1860 case SSL_TLSEXT_ERR_ALERT_FATAL:
1861 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1864 case SSL_TLSEXT_ERR_ALERT_WARNING:
1865 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1868 case SSL_TLSEXT_ERR_NOACK:
1869 s->servername_done=0;
1875 int ssl_check_serverhello_tlsext(SSL *s)
1877 int ret=SSL_TLSEXT_ERR_NOACK;
1878 int al = SSL_AD_UNRECOGNIZED_NAME;
1880 #ifndef OPENSSL_NO_EC
1881 /* If we are client and using an elliptic curve cryptography cipher
1882 * suite, then if server returns an EC point formats lists extension
1883 * it must contain uncompressed.
1885 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1886 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1887 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1888 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
1889 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1891 /* we are using an ECC cipher */
1893 unsigned char *list;
1894 int found_uncompressed = 0;
1895 list = s->session->tlsext_ecpointformatlist;
1896 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1898 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1900 found_uncompressed = 1;
1904 if (!found_uncompressed)
1906 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1910 ret = SSL_TLSEXT_ERR_OK;
1911 #endif /* OPENSSL_NO_EC */
1913 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1914 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1915 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1916 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1918 #ifdef TLSEXT_TYPE_opaque_prf_input
1919 if (s->s3->server_opaque_prf_input_len > 0)
1921 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1922 * So first verify that we really have a value from the server too. */
1924 if (s->s3->server_opaque_prf_input == NULL)
1926 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1927 al = SSL_AD_HANDSHAKE_FAILURE;
1930 /* Anytime the server *has* sent an opaque PRF input, we need to check
1931 * that we have a client opaque PRF input of the same size. */
1932 if (s->s3->client_opaque_prf_input == NULL ||
1933 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1935 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1936 al = SSL_AD_ILLEGAL_PARAMETER;
1941 /* If we've requested certificate status and we wont get one
1944 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1945 && s->ctx && s->ctx->tlsext_status_cb)
1948 /* Set resp to NULL, resplen to -1 so callback knows
1949 * there is no response.
1951 if (s->tlsext_ocsp_resp)
1953 OPENSSL_free(s->tlsext_ocsp_resp);
1954 s->tlsext_ocsp_resp = NULL;
1956 s->tlsext_ocsp_resplen = -1;
1957 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1960 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1961 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1965 al = SSL_AD_INTERNAL_ERROR;
1966 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1972 case SSL_TLSEXT_ERR_ALERT_FATAL:
1973 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1976 case SSL_TLSEXT_ERR_ALERT_WARNING:
1977 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1980 case SSL_TLSEXT_ERR_NOACK:
1981 s->servername_done=0;
1987 /* Since the server cache lookup is done early on in the processing of the
1988 * ClientHello, and other operations depend on the result, we need to handle
1989 * any TLS session ticket extension at the same time.
1991 * session_id: points at the session ID in the ClientHello. This code will
1992 * read past the end of this in order to parse out the session ticket
1993 * extension, if any.
1994 * len: the length of the session ID.
1995 * limit: a pointer to the first byte after the ClientHello.
1996 * ret: (output) on return, if a ticket was decrypted, then this is set to
1997 * point to the resulting session.
1999 * If s->tls_session_secret_cb is set then we are expecting a pre-shared key
2000 * ciphersuite, in which case we have no use for session tickets and one will
2001 * never be decrypted, nor will s->tlsext_ticket_expected be set to 1.
2004 * -1: fatal error, either from parsing or decrypting the ticket.
2005 * 0: no ticket was found (or was ignored, based on settings).
2006 * 1: a zero length extension was found, indicating that the client supports
2007 * session tickets but doesn't currently have one to offer.
2008 * 2: either s->tls_session_secret_cb was set, or a ticket was offered but
2009 * couldn't be decrypted because of a non-fatal error.
2010 * 3: a ticket was successfully decrypted and *ret was set.
2013 * Sets s->tlsext_ticket_expected to 1 if the server will have to issue
2014 * a new session ticket to the client because the client indicated support
2015 * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
2016 * a session ticket or we couldn't use the one it gave us, or if
2017 * s->ctx->tlsext_ticket_key_cb asked to renew the client's ticket.
2018 * Otherwise, s->tlsext_ticket_expected is set to 0.
2020 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
2021 const unsigned char *limit, SSL_SESSION **ret)
2023 /* Point after session ID in client hello */
2024 const unsigned char *p = session_id + len;
2028 s->tlsext_ticket_expected = 0;
2030 /* If tickets disabled behave as if no ticket present
2031 * to permit stateful resumption.
2033 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
2035 if ((s->version <= SSL3_VERSION) || !limit)
2039 /* Skip past DTLS cookie */
2040 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
2047 /* Skip past cipher list */
2052 /* Skip past compression algorithm list */
2057 /* Now at start of extensions */
2058 if ((p + 2) >= limit)
2061 while ((p + 4) <= limit)
2063 unsigned short type, size;
2066 if (p + size > limit)
2068 if (type == TLSEXT_TYPE_session_ticket)
2073 /* The client will accept a ticket but doesn't
2074 * currently have one. */
2075 s->tlsext_ticket_expected = 1;
2078 if (s->tls_session_secret_cb)
2080 /* Indicate that the ticket couldn't be
2081 * decrypted rather than generating the session
2082 * from ticket now, trigger abbreviated
2083 * handshake based on external mechanism to
2084 * calculate the master secret later. */
2087 r = tls_decrypt_ticket(s, p, size, session_id, len, ret);
2090 case 2: /* ticket couldn't be decrypted */
2091 s->tlsext_ticket_expected = 1;
2093 case 3: /* ticket was decrypted */
2095 case 4: /* ticket decrypted but need to renew */
2096 s->tlsext_ticket_expected = 1;
2098 default: /* fatal error */
2107 /* tls_decrypt_ticket attempts to decrypt a session ticket.
2109 * etick: points to the body of the session ticket extension.
2110 * eticklen: the length of the session tickets extenion.
2111 * sess_id: points at the session ID.
2112 * sesslen: the length of the session ID.
2113 * psess: (output) on return, if a ticket was decrypted, then this is set to
2114 * point to the resulting session.
2117 * -1: fatal error, either from parsing or decrypting the ticket.
2118 * 2: the ticket couldn't be decrypted.
2119 * 3: a ticket was successfully decrypted and *psess was set.
2120 * 4: same as 3, but the ticket needs to be renewed.
2122 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
2123 const unsigned char *sess_id, int sesslen,
2124 SSL_SESSION **psess)
2127 unsigned char *sdec;
2128 const unsigned char *p;
2129 int slen, mlen, renew_ticket = 0;
2130 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
2133 SSL_CTX *tctx = s->initial_ctx;
2134 /* Need at least keyname + iv + some encrypted data */
2137 /* Initialize session ticket encryption and HMAC contexts */
2138 HMAC_CTX_init(&hctx);
2139 EVP_CIPHER_CTX_init(&ctx);
2140 if (tctx->tlsext_ticket_key_cb)
2142 unsigned char *nctick = (unsigned char *)etick;
2143 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
2154 /* Check key name matches */
2155 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
2157 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
2158 tlsext_tick_md(), NULL);
2159 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
2160 tctx->tlsext_tick_aes_key, etick + 16);
2162 /* Attempt to process session ticket, first conduct sanity and
2163 * integrity checks on ticket.
2165 mlen = HMAC_size(&hctx);
2168 EVP_CIPHER_CTX_cleanup(&ctx);
2172 /* Check HMAC of encrypted ticket */
2173 HMAC_Update(&hctx, etick, eticklen);
2174 HMAC_Final(&hctx, tick_hmac, NULL);
2175 HMAC_CTX_cleanup(&hctx);
2176 if (memcmp(tick_hmac, etick + eticklen, mlen))
2178 /* Attempt to decrypt session data */
2179 /* Move p after IV to start of encrypted ticket, update length */
2180 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
2181 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
2182 sdec = OPENSSL_malloc(eticklen);
2185 EVP_CIPHER_CTX_cleanup(&ctx);
2188 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
2189 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
2192 EVP_CIPHER_CTX_cleanup(&ctx);
2195 sess = d2i_SSL_SESSION(NULL, &p, slen);
2199 /* The session ID, if non-empty, is used by some clients to
2200 * detect that the ticket has been accepted. So we copy it to
2201 * the session structure. If it is empty set length to zero
2202 * as required by standard.
2205 memcpy(sess->session_id, sess_id, sesslen);
2206 sess->session_id_length = sesslen;
2214 /* For session parse failure, indicate that we need to send a new
2219 /* Tables to translate from NIDs to TLS v1.2 ids */
2227 static tls12_lookup tls12_md[] = {
2228 #ifndef OPENSSL_NO_MD5
2229 {NID_md5, TLSEXT_hash_md5},
2231 #ifndef OPENSSL_NO_SHA
2232 {NID_sha1, TLSEXT_hash_sha1},
2234 #ifndef OPENSSL_NO_SHA256
2235 {NID_sha224, TLSEXT_hash_sha224},
2236 {NID_sha256, TLSEXT_hash_sha256},
2238 #ifndef OPENSSL_NO_SHA512
2239 {NID_sha384, TLSEXT_hash_sha384},
2240 {NID_sha512, TLSEXT_hash_sha512}
2244 static tls12_lookup tls12_sig[] = {
2245 #ifndef OPENSSL_NO_RSA
2246 {EVP_PKEY_RSA, TLSEXT_signature_rsa},
2248 #ifndef OPENSSL_NO_RSA
2249 {EVP_PKEY_DSA, TLSEXT_signature_dsa},
2251 #ifndef OPENSSL_NO_ECDSA
2252 {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
2256 static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
2259 for (i = 0; i < tlen; i++)
2261 if (table[i].nid == nid)
2267 static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen)
2270 for (i = 0; i < tlen; i++)
2272 if (table[i].id == id)
2273 return table[i].nid;
2279 int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
2282 md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
2283 sizeof(tls12_md)/sizeof(tls12_lookup));
2286 sig_id = tls12_get_sigid(pk);
2289 p[0] = (unsigned char)md_id;
2290 p[1] = (unsigned char)sig_id;
2294 int tls12_get_sigid(const EVP_PKEY *pk)
2296 return tls12_find_id(pk->type, tls12_sig,
2297 sizeof(tls12_sig)/sizeof(tls12_lookup));
2300 const EVP_MD *tls12_get_hash(unsigned char hash_alg)
2304 #ifndef OPENSSL_NO_MD5
2305 case TLSEXT_hash_md5:
2312 #ifndef OPENSSL_NO_SHA
2313 case TLSEXT_hash_sha1:
2316 #ifndef OPENSSL_NO_SHA256
2317 case TLSEXT_hash_sha224:
2318 return EVP_sha224();
2320 case TLSEXT_hash_sha256:
2321 return EVP_sha256();
2323 #ifndef OPENSSL_NO_SHA512
2324 case TLSEXT_hash_sha384:
2325 return EVP_sha384();
2327 case TLSEXT_hash_sha512:
2328 return EVP_sha512();
2336 /* Set preferred digest for each key type */
2338 int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
2343 /* Extension ignored for TLS versions below 1.2 */
2344 if (TLS1_get_version(s) < TLS1_2_VERSION)
2346 /* Should never happen */
2350 c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL;
2351 c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL;
2352 c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
2353 c->pkeys[SSL_PKEY_ECC].digest = NULL;
2355 for (i = 0; i < dsize; i += 2)
2357 unsigned char hash_alg = data[i], sig_alg = data[i+1];
2361 #ifndef OPENSSL_NO_RSA
2362 case TLSEXT_signature_rsa:
2363 idx = SSL_PKEY_RSA_SIGN;
2366 #ifndef OPENSSL_NO_DSA
2367 case TLSEXT_signature_dsa:
2368 idx = SSL_PKEY_DSA_SIGN;
2371 #ifndef OPENSSL_NO_ECDSA
2372 case TLSEXT_signature_ecdsa:
2380 if (c->pkeys[idx].digest == NULL)
2382 md = tls12_get_hash(hash_alg);
2385 c->pkeys[idx].digest = md;
2386 if (idx == SSL_PKEY_RSA_SIGN)
2387 c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
2394 /* Set any remaining keys to default values. NOTE: if alg is not
2395 * supported it stays as NULL.
2397 #ifndef OPENSSL_NO_DSA
2398 if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
2399 c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_dss1();
2401 #ifndef OPENSSL_NO_RSA
2402 if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
2404 c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
2405 c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
2408 #ifndef OPENSSL_NO_ECDSA
2409 if (!c->pkeys[SSL_PKEY_ECC].digest)
2410 c->pkeys[SSL_PKEY_ECC].digest = EVP_ecdsa();
2417 #ifndef OPENSSL_NO_HEARTBEATS
2419 tls1_process_heartbeat(SSL *s)
2421 unsigned char *p = &s->s3->rrec.data[0], *pl;
2422 unsigned short hbtype;
2423 unsigned int payload;
2424 unsigned int padding = 16; /* Use minimum padding */
2426 /* Read type and payload length first */
2431 if (s->msg_callback)
2432 s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT,
2433 &s->s3->rrec.data[0], s->s3->rrec.length,
2434 s, s->msg_callback_arg);
2436 if (hbtype == TLS1_HB_REQUEST)
2438 unsigned char *buffer, *bp;
2441 /* Allocate memory for the response, size is 1 bytes
2442 * message type, plus 2 bytes payload length, plus
2443 * payload, plus padding
2445 buffer = OPENSSL_malloc(1 + 2 + payload + padding);
2448 /* Enter response type, length and copy payload */
2449 *bp++ = TLS1_HB_RESPONSE;
2451 memcpy(bp, pl, payload);
2453 r = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buffer, 3 + payload + padding);
2455 if (r >= 0 && s->msg_callback)
2456 s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
2457 buffer, 3 + payload + padding,
2458 s, s->msg_callback_arg);
2460 OPENSSL_free(buffer);
2465 else if (hbtype == TLS1_HB_RESPONSE)
2469 /* We only send sequence numbers (2 bytes unsigned int),
2470 * and 16 random bytes, so we just try to read the
2471 * sequence number */
2474 if (payload == 18 && seq == s->tlsext_hb_seq)
2477 s->tlsext_hb_pending = 0;
2485 tls1_heartbeat(SSL *s)
2487 unsigned char *buf, *p;
2489 unsigned int payload = 18; /* Sequence number + random bytes */
2490 unsigned int padding = 16; /* Use minimum padding */
2492 /* Only send if peer supports and accepts HB requests... */
2493 if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) ||
2494 s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS)
2496 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
2500 /* ...and there is none in flight yet... */
2501 if (s->tlsext_hb_pending)
2503 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PENDING);
2507 /* ...and no handshake in progress. */
2508 if (SSL_in_init(s) || s->in_handshake)
2510 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_UNEXPECTED_MESSAGE);
2514 /* Check if padding is too long, payload and padding
2515 * must not exceed 2^14 - 3 = 16381 bytes in total.
2517 OPENSSL_assert(payload + padding <= 16381);
2519 /* Create HeartBeat message, we just use a sequence number
2520 * as payload to distuingish different messages and add
2521 * some random stuff.
2522 * - Message Type, 1 byte
2523 * - Payload Length, 2 bytes (unsigned int)
2524 * - Payload, the sequence number (2 bytes uint)
2525 * - Payload, random bytes (16 bytes uint)
2528 buf = OPENSSL_malloc(1 + 2 + payload + padding);
2531 *p++ = TLS1_HB_REQUEST;
2532 /* Payload length (18 bytes here) */
2534 /* Sequence number */
2535 s2n(s->tlsext_hb_seq, p);
2536 /* 16 random bytes */
2537 RAND_pseudo_bytes(p, 16);
2539 /* Random padding */
2540 RAND_pseudo_bytes(p, padding);
2542 ret = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding);
2545 if (s->msg_callback)
2546 s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
2547 buf, 3 + payload + padding,
2548 s, s->msg_callback_arg);
2550 s->tlsext_hb_pending = 1;