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 */
816 s2n(TLSEXT_TYPE_heartbeat,ret);
819 * 1: peer may send requests
820 * 2: peer not allowed to send requests
822 if (s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_RECV_REQUESTS)
823 *(ret++) = SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
825 *(ret++) = SSL_TLSEXT_HB_ENABLED;
828 #ifndef OPENSSL_NO_NEXTPROTONEG
829 next_proto_neg_seen = s->s3->next_proto_neg_seen;
830 s->s3->next_proto_neg_seen = 0;
831 if (next_proto_neg_seen && s->ctx->next_protos_advertised_cb)
833 const unsigned char *npa;
837 r = s->ctx->next_protos_advertised_cb(s, &npa, &npalen, s->ctx->next_protos_advertised_cb_arg);
838 if (r == SSL_TLSEXT_ERR_OK)
840 if ((long)(limit - ret - 4 - npalen) < 0) return NULL;
841 s2n(TLSEXT_TYPE_next_proto_neg,ret);
843 memcpy(ret, npa, npalen);
845 s->s3->next_proto_neg_seen = 1;
850 if ((extdatalen = ret-p-2)== 0)
857 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
862 unsigned char *data = *p;
863 int renegotiate_seen = 0;
866 s->servername_done = 0;
867 s->tlsext_status_type = -1;
868 #ifndef OPENSSL_NO_NEXTPROTONEG
869 s->s3->next_proto_neg_seen = 0;
872 #ifndef OPENSSL_NO_HEARTBEATS
873 s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
874 SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
881 if (data > (d+n-len))
884 while (data <= (d+n-4))
889 if (data+size > (d+n))
892 fprintf(stderr,"Received extension type %d size %d\n",type,size);
894 if (s->tlsext_debug_cb)
895 s->tlsext_debug_cb(s, 0, type, data, size,
896 s->tlsext_debug_arg);
897 /* The servername extension is treated as follows:
899 - Only the hostname type is supported with a maximum length of 255.
900 - The servername is rejected if too long or if it contains zeros,
901 in which case an fatal alert is generated.
902 - The servername field is maintained together with the session cache.
903 - When a session is resumed, the servername call back invoked in order
904 to allow the application to position itself to the right context.
905 - The servername is acknowledged if it is new for a session or when
906 it is identical to a previously used for the same session.
907 Applications can control the behaviour. They can at any time
908 set a 'desirable' servername for a new SSL object. This can be the
909 case for example with HTTPS when a Host: header field is received and
910 a renegotiation is requested. In this case, a possible servername
911 presented in the new client hello is only acknowledged if it matches
912 the value of the Host: field.
913 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
914 if they provide for changing an explicit servername context for the session,
915 i.e. when the session has been established with a servername extension.
916 - On session reconnect, the servername extension may be absent.
920 if (type == TLSEXT_TYPE_server_name)
922 unsigned char *sdata;
928 *al = SSL_AD_DECODE_ERROR;
935 *al = SSL_AD_DECODE_ERROR;
942 servname_type = *(sdata++);
948 *al = SSL_AD_DECODE_ERROR;
951 if (s->servername_done == 0)
952 switch (servname_type)
954 case TLSEXT_NAMETYPE_host_name:
957 if(s->session->tlsext_hostname)
959 *al = SSL_AD_DECODE_ERROR;
962 if (len > TLSEXT_MAXLEN_host_name)
964 *al = TLS1_AD_UNRECOGNIZED_NAME;
967 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
969 *al = TLS1_AD_INTERNAL_ERROR;
972 memcpy(s->session->tlsext_hostname, sdata, len);
973 s->session->tlsext_hostname[len]='\0';
974 if (strlen(s->session->tlsext_hostname) != len) {
975 OPENSSL_free(s->session->tlsext_hostname);
976 s->session->tlsext_hostname = NULL;
977 *al = TLS1_AD_UNRECOGNIZED_NAME;
980 s->servername_done = 1;
984 s->servername_done = s->session->tlsext_hostname
985 && strlen(s->session->tlsext_hostname) == len
986 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
998 *al = SSL_AD_DECODE_ERROR;
1003 #ifndef OPENSSL_NO_SRP
1004 else if (type == TLSEXT_TYPE_srp)
1009 if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
1011 memcpy(s->srp_ctx.login, &data[1], len);
1012 s->srp_ctx.login[len]='\0';
1017 #ifndef OPENSSL_NO_EC
1018 else if (type == TLSEXT_TYPE_ec_point_formats &&
1019 s->version != DTLS1_VERSION)
1021 unsigned char *sdata = data;
1022 int ecpointformatlist_length = *(sdata++);
1024 if (ecpointformatlist_length != size - 1)
1026 *al = TLS1_AD_DECODE_ERROR;
1031 if(s->session->tlsext_ecpointformatlist)
1033 OPENSSL_free(s->session->tlsext_ecpointformatlist);
1034 s->session->tlsext_ecpointformatlist = NULL;
1036 s->session->tlsext_ecpointformatlist_length = 0;
1037 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1039 *al = TLS1_AD_INTERNAL_ERROR;
1042 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1043 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1046 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
1047 sdata = s->session->tlsext_ecpointformatlist;
1048 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1049 fprintf(stderr,"%i ",*(sdata++));
1050 fprintf(stderr,"\n");
1053 else if (type == TLSEXT_TYPE_elliptic_curves &&
1054 s->version != DTLS1_VERSION)
1056 unsigned char *sdata = data;
1057 int ellipticcurvelist_length = (*(sdata++) << 8);
1058 ellipticcurvelist_length += (*(sdata++));
1060 if (ellipticcurvelist_length != size - 2)
1062 *al = TLS1_AD_DECODE_ERROR;
1067 if(s->session->tlsext_ellipticcurvelist)
1069 *al = TLS1_AD_DECODE_ERROR;
1072 s->session->tlsext_ellipticcurvelist_length = 0;
1073 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
1075 *al = TLS1_AD_INTERNAL_ERROR;
1078 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
1079 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
1082 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
1083 sdata = s->session->tlsext_ellipticcurvelist;
1084 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
1085 fprintf(stderr,"%i ",*(sdata++));
1086 fprintf(stderr,"\n");
1089 #endif /* OPENSSL_NO_EC */
1090 #ifdef TLSEXT_TYPE_opaque_prf_input
1091 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1092 s->version != DTLS1_VERSION)
1094 unsigned char *sdata = data;
1098 *al = SSL_AD_DECODE_ERROR;
1101 n2s(sdata, s->s3->client_opaque_prf_input_len);
1102 if (s->s3->client_opaque_prf_input_len != size - 2)
1104 *al = SSL_AD_DECODE_ERROR;
1108 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1109 OPENSSL_free(s->s3->client_opaque_prf_input);
1110 if (s->s3->client_opaque_prf_input_len == 0)
1111 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1113 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
1114 if (s->s3->client_opaque_prf_input == NULL)
1116 *al = TLS1_AD_INTERNAL_ERROR;
1121 else if (type == TLSEXT_TYPE_session_ticket)
1123 if (s->tls_session_ticket_ext_cb &&
1124 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1126 *al = TLS1_AD_INTERNAL_ERROR;
1130 else if (type == TLSEXT_TYPE_renegotiate)
1132 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
1134 renegotiate_seen = 1;
1136 else if (type == TLSEXT_TYPE_signature_algorithms)
1139 if (sigalg_seen || size < 2)
1141 *al = SSL_AD_DECODE_ERROR;
1147 if (dsize != size || dsize & 1)
1149 *al = SSL_AD_DECODE_ERROR;
1152 if (!tls1_process_sigalgs(s, data, dsize))
1154 *al = SSL_AD_DECODE_ERROR;
1158 else if (type == TLSEXT_TYPE_status_request &&
1159 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
1164 *al = SSL_AD_DECODE_ERROR;
1168 s->tlsext_status_type = *data++;
1170 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
1172 const unsigned char *sdata;
1174 /* Read in responder_id_list */
1179 *al = SSL_AD_DECODE_ERROR;
1188 *al = SSL_AD_DECODE_ERROR;
1192 dsize -= 2 + idsize;
1196 *al = SSL_AD_DECODE_ERROR;
1201 id = d2i_OCSP_RESPID(NULL,
1205 *al = SSL_AD_DECODE_ERROR;
1210 OCSP_RESPID_free(id);
1211 *al = SSL_AD_DECODE_ERROR;
1214 if (!s->tlsext_ocsp_ids
1215 && !(s->tlsext_ocsp_ids =
1216 sk_OCSP_RESPID_new_null()))
1218 OCSP_RESPID_free(id);
1219 *al = SSL_AD_INTERNAL_ERROR;
1222 if (!sk_OCSP_RESPID_push(
1223 s->tlsext_ocsp_ids, id))
1225 OCSP_RESPID_free(id);
1226 *al = SSL_AD_INTERNAL_ERROR;
1231 /* Read in request_extensions */
1234 *al = SSL_AD_DECODE_ERROR;
1241 *al = SSL_AD_DECODE_ERROR;
1247 s->tlsext_ocsp_exts =
1248 d2i_X509_EXTENSIONS(NULL,
1250 if (!s->tlsext_ocsp_exts
1251 || (data + dsize != sdata))
1253 *al = SSL_AD_DECODE_ERROR;
1258 /* We don't know what to do with any other type
1262 s->tlsext_status_type = -1;
1264 #ifndef OPENSSL_NO_HEARTBEATS
1265 else if (type == TLSEXT_TYPE_heartbeat)
1269 case 0x01: /* Client allows us to send HB requests */
1270 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1272 case 0x02: /* Client doesn't accept HB requests */
1273 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1274 s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
1279 #ifndef OPENSSL_NO_NEXTPROTONEG
1280 else if (type == TLSEXT_TYPE_next_proto_neg &&
1281 s->s3->tmp.finish_md_len == 0)
1283 /* We shouldn't accept this extension on a
1286 * s->new_session will be set on renegotiation, but we
1287 * probably shouldn't rely that it couldn't be set on
1288 * the initial renegotation too in certain cases (when
1289 * there's some other reason to disallow resuming an
1290 * earlier session -- the current code won't be doing
1291 * anything like that, but this might change).
1293 * A valid sign that there's been a previous handshake
1294 * in this connection is if s->s3->tmp.finish_md_len >
1295 * 0. (We are talking about a check that will happen
1296 * in the Hello protocol round, well before a new
1297 * Finished message could have been computed.) */
1298 s->s3->next_proto_neg_seen = 1;
1302 /* session ticket processed earlier */
1303 else if (type == TLSEXT_TYPE_use_srtp)
1305 if(ssl_parse_clienthello_use_srtp_ext(s, data, size,
1317 /* Need RI if renegotiating */
1319 if (!renegotiate_seen && s->renegotiate &&
1320 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1322 *al = SSL_AD_HANDSHAKE_FAILURE;
1323 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
1324 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1331 #ifndef OPENSSL_NO_NEXTPROTONEG
1332 /* ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1333 * elements of zero length are allowed and the set of elements must exactly fill
1334 * the length of the block. */
1335 static char ssl_next_proto_validate(unsigned char *d, unsigned len)
1337 unsigned int off = 0;
1351 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1353 unsigned short length;
1354 unsigned short type;
1355 unsigned short size;
1356 unsigned char *data = *p;
1357 int tlsext_servername = 0;
1358 int renegotiate_seen = 0;
1360 #ifndef OPENSSL_NO_NEXTPROTONEG
1361 s->s3->next_proto_neg_seen = 0;
1364 #ifndef OPENSSL_NO_HEARTBEATS
1365 s->tlsext_heartbeat &= ~(SSL_TLSEXT_HB_ENABLED |
1366 SSL_TLSEXT_HB_DONT_SEND_REQUESTS);
1369 if (data >= (d+n-2))
1373 if (data+length != d+n)
1375 *al = SSL_AD_DECODE_ERROR;
1379 while(data <= (d+n-4))
1384 if (data+size > (d+n))
1387 if (s->tlsext_debug_cb)
1388 s->tlsext_debug_cb(s, 1, type, data, size,
1389 s->tlsext_debug_arg);
1391 if (type == TLSEXT_TYPE_server_name)
1393 if (s->tlsext_hostname == NULL || size > 0)
1395 *al = TLS1_AD_UNRECOGNIZED_NAME;
1398 tlsext_servername = 1;
1401 #ifndef OPENSSL_NO_EC
1402 else if (type == TLSEXT_TYPE_ec_point_formats &&
1403 s->version != DTLS1_VERSION)
1405 unsigned char *sdata = data;
1406 int ecpointformatlist_length = *(sdata++);
1408 if (ecpointformatlist_length != size - 1)
1410 *al = TLS1_AD_DECODE_ERROR;
1413 s->session->tlsext_ecpointformatlist_length = 0;
1414 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1415 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1417 *al = TLS1_AD_INTERNAL_ERROR;
1420 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1421 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1423 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1424 sdata = s->session->tlsext_ecpointformatlist;
1425 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1426 fprintf(stderr,"%i ",*(sdata++));
1427 fprintf(stderr,"\n");
1430 #endif /* OPENSSL_NO_EC */
1432 else if (type == TLSEXT_TYPE_session_ticket)
1434 if (s->tls_session_ticket_ext_cb &&
1435 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1437 *al = TLS1_AD_INTERNAL_ERROR;
1440 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1443 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1446 s->tlsext_ticket_expected = 1;
1448 #ifdef TLSEXT_TYPE_opaque_prf_input
1449 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1450 s->version != DTLS1_VERSION)
1452 unsigned char *sdata = data;
1456 *al = SSL_AD_DECODE_ERROR;
1459 n2s(sdata, s->s3->server_opaque_prf_input_len);
1460 if (s->s3->server_opaque_prf_input_len != size - 2)
1462 *al = SSL_AD_DECODE_ERROR;
1466 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1467 OPENSSL_free(s->s3->server_opaque_prf_input);
1468 if (s->s3->server_opaque_prf_input_len == 0)
1469 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1471 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1473 if (s->s3->server_opaque_prf_input == NULL)
1475 *al = TLS1_AD_INTERNAL_ERROR;
1480 else if (type == TLSEXT_TYPE_status_request &&
1481 s->version != DTLS1_VERSION)
1483 /* MUST be empty and only sent if we've requested
1484 * a status request message.
1486 if ((s->tlsext_status_type == -1) || (size > 0))
1488 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1491 /* Set flag to expect CertificateStatus message */
1492 s->tlsext_status_expected = 1;
1494 #ifndef OPENSSL_NO_NEXTPROTONEG
1495 else if (type == TLSEXT_TYPE_next_proto_neg &&
1496 s->s3->tmp.finish_md_len == 0)
1498 unsigned char *selected;
1499 unsigned char selected_len;
1501 /* We must have requested it. */
1502 if ((s->ctx->next_proto_select_cb == NULL))
1504 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1507 /* The data must be valid */
1508 if (!ssl_next_proto_validate(data, size))
1510 *al = TLS1_AD_DECODE_ERROR;
1513 if (s->ctx->next_proto_select_cb(s, &selected, &selected_len, data, size, s->ctx->next_proto_select_cb_arg) != SSL_TLSEXT_ERR_OK)
1515 *al = TLS1_AD_INTERNAL_ERROR;
1518 s->next_proto_negotiated = OPENSSL_malloc(selected_len);
1519 if (!s->next_proto_negotiated)
1521 *al = TLS1_AD_INTERNAL_ERROR;
1524 memcpy(s->next_proto_negotiated, selected, selected_len);
1525 s->next_proto_negotiated_len = selected_len;
1526 s->s3->next_proto_neg_seen = 1;
1529 else if (type == TLSEXT_TYPE_renegotiate)
1531 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1533 renegotiate_seen = 1;
1535 #ifndef OPENSSL_NO_HEARTBEATS
1536 else if (type == TLSEXT_TYPE_heartbeat)
1540 case 0x01: /* Server allows us to send HB requests */
1541 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1543 case 0x02: /* Server doesn't accept HB requests */
1544 s->tlsext_heartbeat |= SSL_TLSEXT_HB_ENABLED;
1545 s->tlsext_heartbeat |= SSL_TLSEXT_HB_DONT_SEND_REQUESTS;
1550 else if (type == TLSEXT_TYPE_use_srtp)
1552 if(ssl_parse_serverhello_use_srtp_ext(s, data, size,
1562 *al = SSL_AD_DECODE_ERROR;
1566 if (!s->hit && tlsext_servername == 1)
1568 if (s->tlsext_hostname)
1570 if (s->session->tlsext_hostname == NULL)
1572 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1573 if (!s->session->tlsext_hostname)
1575 *al = SSL_AD_UNRECOGNIZED_NAME;
1581 *al = SSL_AD_DECODE_ERROR;
1591 /* Determine if we need to see RI. Strictly speaking if we want to
1592 * avoid an attack we should *always* see RI even on initial server
1593 * hello because the client doesn't see any renegotiation during an
1594 * attack. However this would mean we could not connect to any server
1595 * which doesn't support RI so for the immediate future tolerate RI
1596 * absence on initial connect only.
1598 if (!renegotiate_seen
1599 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
1600 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1602 *al = SSL_AD_HANDSHAKE_FAILURE;
1603 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
1604 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1612 int ssl_prepare_clienthello_tlsext(SSL *s)
1614 #ifndef OPENSSL_NO_EC
1615 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1616 * and elliptic curves we support.
1621 unsigned long alg_k, alg_a;
1622 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1624 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1626 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1628 alg_k = c->algorithm_mkey;
1629 alg_a = c->algorithm_auth;
1630 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1636 using_ecc = using_ecc && (s->version >= TLS1_VERSION);
1639 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1640 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1642 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1645 s->tlsext_ecpointformatlist_length = 3;
1646 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1647 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1648 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1650 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1651 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1652 s->tlsext_ellipticcurvelist_length = sizeof(pref_list)/sizeof(pref_list[0]) * 2;
1653 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1655 s->tlsext_ellipticcurvelist_length = 0;
1656 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1659 for (i = 0, j = s->tlsext_ellipticcurvelist; (unsigned int)i <
1660 sizeof(pref_list)/sizeof(pref_list[0]); i++)
1662 int id = tls1_ec_nid2curve_id(pref_list[i]);
1666 #endif /* OPENSSL_NO_EC */
1668 #ifdef TLSEXT_TYPE_opaque_prf_input
1672 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1674 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1679 if (s->tlsext_opaque_prf_input != NULL)
1681 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1682 OPENSSL_free(s->s3->client_opaque_prf_input);
1684 if (s->tlsext_opaque_prf_input_len == 0)
1685 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1687 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1688 if (s->s3->client_opaque_prf_input == NULL)
1690 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1693 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1697 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1698 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1705 int ssl_prepare_serverhello_tlsext(SSL *s)
1707 #ifndef OPENSSL_NO_EC
1708 /* If we are server and using an ECC cipher suite, send the point formats we support
1709 * if the client sent us an ECPointsFormat extension. Note that the server is not
1710 * supposed to send an EllipticCurves extension.
1713 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1714 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1715 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1716 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1720 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1721 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1723 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1726 s->tlsext_ecpointformatlist_length = 3;
1727 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1728 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1729 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1731 #endif /* OPENSSL_NO_EC */
1736 int ssl_check_clienthello_tlsext(SSL *s)
1738 int ret=SSL_TLSEXT_ERR_NOACK;
1739 int al = SSL_AD_UNRECOGNIZED_NAME;
1741 #ifndef OPENSSL_NO_EC
1742 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1743 * ssl3_choose_cipher in s3_lib.c.
1745 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1746 * ssl3_choose_cipher in s3_lib.c.
1750 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1751 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1752 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1753 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1755 /* If status request then ask callback what to do.
1756 * Note: this must be called after servername callbacks in case
1757 * the certificate has changed.
1759 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1762 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1765 /* We don't want to send a status request response */
1766 case SSL_TLSEXT_ERR_NOACK:
1767 s->tlsext_status_expected = 0;
1769 /* status request response should be sent */
1770 case SSL_TLSEXT_ERR_OK:
1771 if (s->tlsext_ocsp_resp)
1772 s->tlsext_status_expected = 1;
1774 s->tlsext_status_expected = 0;
1776 /* something bad happened */
1777 case SSL_TLSEXT_ERR_ALERT_FATAL:
1778 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1779 al = SSL_AD_INTERNAL_ERROR;
1784 s->tlsext_status_expected = 0;
1786 #ifdef TLSEXT_TYPE_opaque_prf_input
1788 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1789 * but we might be sending an alert in response to the client hello,
1790 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1794 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1796 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1799 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1800 al = SSL_AD_INTERNAL_ERROR;
1805 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1806 OPENSSL_free(s->s3->server_opaque_prf_input);
1807 s->s3->server_opaque_prf_input = NULL;
1809 if (s->tlsext_opaque_prf_input != NULL)
1811 if (s->s3->client_opaque_prf_input != NULL &&
1812 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1814 /* can only use this extension if we have a server opaque PRF input
1815 * of the same length as the client opaque PRF input! */
1817 if (s->tlsext_opaque_prf_input_len == 0)
1818 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1820 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1821 if (s->s3->server_opaque_prf_input == NULL)
1823 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1824 al = SSL_AD_INTERNAL_ERROR;
1827 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1831 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1833 /* The callback wants to enforce use of the extension,
1834 * but we can't do that with the client opaque PRF input;
1835 * abort the handshake.
1837 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1838 al = SSL_AD_HANDSHAKE_FAILURE;
1846 case SSL_TLSEXT_ERR_ALERT_FATAL:
1847 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1850 case SSL_TLSEXT_ERR_ALERT_WARNING:
1851 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1854 case SSL_TLSEXT_ERR_NOACK:
1855 s->servername_done=0;
1861 int ssl_check_serverhello_tlsext(SSL *s)
1863 int ret=SSL_TLSEXT_ERR_NOACK;
1864 int al = SSL_AD_UNRECOGNIZED_NAME;
1866 #ifndef OPENSSL_NO_EC
1867 /* If we are client and using an elliptic curve cryptography cipher
1868 * suite, then if server returns an EC point formats lists extension
1869 * it must contain uncompressed.
1871 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1872 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1873 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1874 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
1875 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1877 /* we are using an ECC cipher */
1879 unsigned char *list;
1880 int found_uncompressed = 0;
1881 list = s->session->tlsext_ecpointformatlist;
1882 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1884 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1886 found_uncompressed = 1;
1890 if (!found_uncompressed)
1892 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1896 ret = SSL_TLSEXT_ERR_OK;
1897 #endif /* OPENSSL_NO_EC */
1899 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1900 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1901 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1902 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1904 #ifdef TLSEXT_TYPE_opaque_prf_input
1905 if (s->s3->server_opaque_prf_input_len > 0)
1907 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1908 * So first verify that we really have a value from the server too. */
1910 if (s->s3->server_opaque_prf_input == NULL)
1912 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1913 al = SSL_AD_HANDSHAKE_FAILURE;
1916 /* Anytime the server *has* sent an opaque PRF input, we need to check
1917 * that we have a client opaque PRF input of the same size. */
1918 if (s->s3->client_opaque_prf_input == NULL ||
1919 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1921 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1922 al = SSL_AD_ILLEGAL_PARAMETER;
1927 /* If we've requested certificate status and we wont get one
1930 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1931 && s->ctx && s->ctx->tlsext_status_cb)
1934 /* Set resp to NULL, resplen to -1 so callback knows
1935 * there is no response.
1937 if (s->tlsext_ocsp_resp)
1939 OPENSSL_free(s->tlsext_ocsp_resp);
1940 s->tlsext_ocsp_resp = NULL;
1942 s->tlsext_ocsp_resplen = -1;
1943 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1946 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1947 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1951 al = SSL_AD_INTERNAL_ERROR;
1952 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1958 case SSL_TLSEXT_ERR_ALERT_FATAL:
1959 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1962 case SSL_TLSEXT_ERR_ALERT_WARNING:
1963 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1966 case SSL_TLSEXT_ERR_NOACK:
1967 s->servername_done=0;
1973 /* Since the server cache lookup is done early on in the processing of the
1974 * ClientHello, and other operations depend on the result, we need to handle
1975 * any TLS session ticket extension at the same time.
1977 * session_id: points at the session ID in the ClientHello. This code will
1978 * read past the end of this in order to parse out the session ticket
1979 * extension, if any.
1980 * len: the length of the session ID.
1981 * limit: a pointer to the first byte after the ClientHello.
1982 * ret: (output) on return, if a ticket was decrypted, then this is set to
1983 * point to the resulting session.
1985 * If s->tls_session_secret_cb is set then we are expecting a pre-shared key
1986 * ciphersuite, in which case we have no use for session tickets and one will
1987 * never be decrypted, nor will s->tlsext_ticket_expected be set to 1.
1990 * -1: fatal error, either from parsing or decrypting the ticket.
1991 * 0: no ticket was found (or was ignored, based on settings).
1992 * 1: a zero length extension was found, indicating that the client supports
1993 * session tickets but doesn't currently have one to offer.
1994 * 2: either s->tls_session_secret_cb was set, or a ticket was offered but
1995 * couldn't be decrypted because of a non-fatal error.
1996 * 3: a ticket was successfully decrypted and *ret was set.
1999 * Sets s->tlsext_ticket_expected to 1 if the server will have to issue
2000 * a new session ticket to the client because the client indicated support
2001 * (and s->tls_session_secret_cb is NULL) but the client either doesn't have
2002 * a session ticket or we couldn't use the one it gave us, or if
2003 * s->ctx->tlsext_ticket_key_cb asked to renew the client's ticket.
2004 * Otherwise, s->tlsext_ticket_expected is set to 0.
2006 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
2007 const unsigned char *limit, SSL_SESSION **ret)
2009 /* Point after session ID in client hello */
2010 const unsigned char *p = session_id + len;
2014 s->tlsext_ticket_expected = 0;
2016 /* If tickets disabled behave as if no ticket present
2017 * to permit stateful resumption.
2019 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
2021 if ((s->version <= SSL3_VERSION) || !limit)
2025 /* Skip past DTLS cookie */
2026 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
2033 /* Skip past cipher list */
2038 /* Skip past compression algorithm list */
2043 /* Now at start of extensions */
2044 if ((p + 2) >= limit)
2047 while ((p + 4) <= limit)
2049 unsigned short type, size;
2052 if (p + size > limit)
2054 if (type == TLSEXT_TYPE_session_ticket)
2059 /* The client will accept a ticket but doesn't
2060 * currently have one. */
2061 s->tlsext_ticket_expected = 1;
2064 if (s->tls_session_secret_cb)
2066 /* Indicate that the ticket couldn't be
2067 * decrypted rather than generating the session
2068 * from ticket now, trigger abbreviated
2069 * handshake based on external mechanism to
2070 * calculate the master secret later. */
2073 r = tls_decrypt_ticket(s, p, size, session_id, len, ret);
2076 case 2: /* ticket couldn't be decrypted */
2077 s->tlsext_ticket_expected = 1;
2079 case 3: /* ticket was decrypted */
2081 case 4: /* ticket decrypted but need to renew */
2082 s->tlsext_ticket_expected = 1;
2084 default: /* fatal error */
2093 /* tls_decrypt_ticket attempts to decrypt a session ticket.
2095 * etick: points to the body of the session ticket extension.
2096 * eticklen: the length of the session tickets extenion.
2097 * sess_id: points at the session ID.
2098 * sesslen: the length of the session ID.
2099 * psess: (output) on return, if a ticket was decrypted, then this is set to
2100 * point to the resulting session.
2103 * -1: fatal error, either from parsing or decrypting the ticket.
2104 * 2: the ticket couldn't be decrypted.
2105 * 3: a ticket was successfully decrypted and *psess was set.
2106 * 4: same as 3, but the ticket needs to be renewed.
2108 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
2109 const unsigned char *sess_id, int sesslen,
2110 SSL_SESSION **psess)
2113 unsigned char *sdec;
2114 const unsigned char *p;
2115 int slen, mlen, renew_ticket = 0;
2116 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
2119 SSL_CTX *tctx = s->initial_ctx;
2120 /* Need at least keyname + iv + some encrypted data */
2123 /* Initialize session ticket encryption and HMAC contexts */
2124 HMAC_CTX_init(&hctx);
2125 EVP_CIPHER_CTX_init(&ctx);
2126 if (tctx->tlsext_ticket_key_cb)
2128 unsigned char *nctick = (unsigned char *)etick;
2129 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
2140 /* Check key name matches */
2141 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
2143 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
2144 tlsext_tick_md(), NULL);
2145 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
2146 tctx->tlsext_tick_aes_key, etick + 16);
2148 /* Attempt to process session ticket, first conduct sanity and
2149 * integrity checks on ticket.
2151 mlen = HMAC_size(&hctx);
2154 EVP_CIPHER_CTX_cleanup(&ctx);
2158 /* Check HMAC of encrypted ticket */
2159 HMAC_Update(&hctx, etick, eticklen);
2160 HMAC_Final(&hctx, tick_hmac, NULL);
2161 HMAC_CTX_cleanup(&hctx);
2162 if (memcmp(tick_hmac, etick + eticklen, mlen))
2164 /* Attempt to decrypt session data */
2165 /* Move p after IV to start of encrypted ticket, update length */
2166 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
2167 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
2168 sdec = OPENSSL_malloc(eticklen);
2171 EVP_CIPHER_CTX_cleanup(&ctx);
2174 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
2175 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
2178 EVP_CIPHER_CTX_cleanup(&ctx);
2181 sess = d2i_SSL_SESSION(NULL, &p, slen);
2185 /* The session ID, if non-empty, is used by some clients to
2186 * detect that the ticket has been accepted. So we copy it to
2187 * the session structure. If it is empty set length to zero
2188 * as required by standard.
2191 memcpy(sess->session_id, sess_id, sesslen);
2192 sess->session_id_length = sesslen;
2200 /* For session parse failure, indicate that we need to send a new
2205 /* Tables to translate from NIDs to TLS v1.2 ids */
2213 static tls12_lookup tls12_md[] = {
2214 #ifndef OPENSSL_NO_MD5
2215 {NID_md5, TLSEXT_hash_md5},
2217 #ifndef OPENSSL_NO_SHA
2218 {NID_sha1, TLSEXT_hash_sha1},
2220 #ifndef OPENSSL_NO_SHA256
2221 {NID_sha224, TLSEXT_hash_sha224},
2222 {NID_sha256, TLSEXT_hash_sha256},
2224 #ifndef OPENSSL_NO_SHA512
2225 {NID_sha384, TLSEXT_hash_sha384},
2226 {NID_sha512, TLSEXT_hash_sha512}
2230 static tls12_lookup tls12_sig[] = {
2231 #ifndef OPENSSL_NO_RSA
2232 {EVP_PKEY_RSA, TLSEXT_signature_rsa},
2234 #ifndef OPENSSL_NO_RSA
2235 {EVP_PKEY_DSA, TLSEXT_signature_dsa},
2237 #ifndef OPENSSL_NO_ECDSA
2238 {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
2242 static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
2245 for (i = 0; i < tlen; i++)
2247 if (table[i].nid == nid)
2253 static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen)
2256 for (i = 0; i < tlen; i++)
2258 if (table[i].id == id)
2259 return table[i].nid;
2265 int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
2268 md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
2269 sizeof(tls12_md)/sizeof(tls12_lookup));
2272 sig_id = tls12_get_sigid(pk);
2275 p[0] = (unsigned char)md_id;
2276 p[1] = (unsigned char)sig_id;
2280 int tls12_get_sigid(const EVP_PKEY *pk)
2282 return tls12_find_id(pk->type, tls12_sig,
2283 sizeof(tls12_sig)/sizeof(tls12_lookup));
2286 const EVP_MD *tls12_get_hash(unsigned char hash_alg)
2290 #ifndef OPENSSL_NO_MD5
2291 case TLSEXT_hash_md5:
2298 #ifndef OPENSSL_NO_SHA
2299 case TLSEXT_hash_sha1:
2302 #ifndef OPENSSL_NO_SHA256
2303 case TLSEXT_hash_sha224:
2304 return EVP_sha224();
2306 case TLSEXT_hash_sha256:
2307 return EVP_sha256();
2309 #ifndef OPENSSL_NO_SHA512
2310 case TLSEXT_hash_sha384:
2311 return EVP_sha384();
2313 case TLSEXT_hash_sha512:
2314 return EVP_sha512();
2322 /* Set preferred digest for each key type */
2324 int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
2329 /* Extension ignored for TLS versions below 1.2 */
2330 if (TLS1_get_version(s) < TLS1_2_VERSION)
2332 /* Should never happen */
2336 c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL;
2337 c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL;
2338 c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
2339 c->pkeys[SSL_PKEY_ECC].digest = NULL;
2341 for (i = 0; i < dsize; i += 2)
2343 unsigned char hash_alg = data[i], sig_alg = data[i+1];
2347 #ifndef OPENSSL_NO_RSA
2348 case TLSEXT_signature_rsa:
2349 idx = SSL_PKEY_RSA_SIGN;
2352 #ifndef OPENSSL_NO_DSA
2353 case TLSEXT_signature_dsa:
2354 idx = SSL_PKEY_DSA_SIGN;
2357 #ifndef OPENSSL_NO_ECDSA
2358 case TLSEXT_signature_ecdsa:
2366 if (c->pkeys[idx].digest == NULL)
2368 md = tls12_get_hash(hash_alg);
2371 c->pkeys[idx].digest = md;
2372 if (idx == SSL_PKEY_RSA_SIGN)
2373 c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
2380 /* Set any remaining keys to default values. NOTE: if alg is not
2381 * supported it stays as NULL.
2383 #ifndef OPENSSL_NO_DSA
2384 if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
2385 c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_dss1();
2387 #ifndef OPENSSL_NO_RSA
2388 if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
2390 c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
2391 c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
2394 #ifndef OPENSSL_NO_ECDSA
2395 if (!c->pkeys[SSL_PKEY_ECC].digest)
2396 c->pkeys[SSL_PKEY_ECC].digest = EVP_ecdsa();
2403 #ifndef OPENSSL_NO_HEARTBEATS
2405 tls1_process_heartbeat(SSL *s)
2407 unsigned char *p = &s->s3->rrec.data[0], *pl;
2408 unsigned short hbtype;
2409 unsigned int payload;
2410 unsigned int padding = 16; /* Use minimum padding */
2412 /* Read type and payload length first */
2417 if (s->msg_callback)
2418 s->msg_callback(0, s->version, TLS1_RT_HEARTBEAT,
2419 &s->s3->rrec.data[0], s->s3->rrec.length,
2420 s, s->msg_callback_arg);
2422 if (hbtype == TLS1_HB_REQUEST)
2424 unsigned char *buffer, *bp;
2427 /* Allocate memory for the response, size is 1 bytes
2428 * message type, plus 2 bytes payload length, plus
2429 * payload, plus padding
2431 buffer = OPENSSL_malloc(1 + 2 + payload + padding);
2434 /* Enter response type, length and copy payload */
2435 *bp++ = TLS1_HB_RESPONSE;
2437 memcpy(bp, pl, payload);
2439 r = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buffer, 3 + payload + padding);
2441 if (r >= 0 && s->msg_callback)
2442 s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
2443 buffer, 3 + payload + padding,
2444 s, s->msg_callback_arg);
2446 OPENSSL_free(buffer);
2451 else if (hbtype == TLS1_HB_RESPONSE)
2455 /* We only send sequence numbers (2 bytes unsigned int),
2456 * and 16 random bytes, so we just try to read the
2457 * sequence number */
2460 if (payload == 18 && seq == s->tlsext_hb_seq)
2463 s->tlsext_hb_pending = 0;
2471 tls1_heartbeat(SSL *s)
2473 unsigned char *buf, *p;
2475 unsigned int payload = 18; /* Sequence number + random bytes */
2476 unsigned int padding = 16; /* Use minimum padding */
2478 /* Only send if peer supports and accepts HB requests... */
2479 if (!(s->tlsext_heartbeat & SSL_TLSEXT_HB_ENABLED) ||
2480 s->tlsext_heartbeat & SSL_TLSEXT_HB_DONT_SEND_REQUESTS)
2482 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PEER_DOESNT_ACCEPT);
2486 /* ...and there is none in flight yet... */
2487 if (s->tlsext_hb_pending)
2489 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_TLS_HEARTBEAT_PENDING);
2493 /* ...and no handshake in progress. */
2494 if (SSL_in_init(s) || s->in_handshake)
2496 SSLerr(SSL_F_TLS1_HEARTBEAT,SSL_R_UNEXPECTED_MESSAGE);
2500 /* Check if padding is too long, payload and padding
2501 * must not exceed 2^14 - 3 = 16381 bytes in total.
2503 OPENSSL_assert(payload + padding <= 16381);
2505 /* Create HeartBeat message, we just use a sequence number
2506 * as payload to distuingish different messages and add
2507 * some random stuff.
2508 * - Message Type, 1 byte
2509 * - Payload Length, 2 bytes (unsigned int)
2510 * - Payload, the sequence number (2 bytes uint)
2511 * - Payload, random bytes (16 bytes uint)
2514 buf = OPENSSL_malloc(1 + 2 + payload + padding);
2517 *p++ = TLS1_HB_REQUEST;
2518 /* Payload length (18 bytes here) */
2520 /* Sequence number */
2521 s2n(s->tlsext_hb_seq, p);
2522 /* 16 random bytes */
2523 RAND_pseudo_bytes(p, 16);
2525 /* Random padding */
2526 RAND_pseudo_bytes(p, padding);
2528 ret = ssl3_write_bytes(s, TLS1_RT_HEARTBEAT, buf, 3 + payload + padding);
2531 if (s->msg_callback)
2532 s->msg_callback(1, s->version, TLS1_RT_HEARTBEAT,
2533 buf, 3 + payload + padding,
2534 s, s->msg_callback_arg);
2536 s->tlsext_hb_pending = 1;