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 "ssl_locl.h"
119 const char tls1_version_str[]="TLSv1" OPENSSL_VERSION_PTEXT;
121 #ifndef OPENSSL_NO_TLSEXT
122 static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, int ticklen,
123 const unsigned char *sess_id, int sesslen,
124 SSL_SESSION **psess);
127 SSL3_ENC_METHOD TLSv1_enc_data={
130 tls1_setup_key_block,
131 tls1_generate_master_secret,
132 tls1_change_cipher_state,
133 tls1_final_finish_mac,
134 TLS1_FINISH_MAC_LENGTH,
135 tls1_cert_verify_mac,
136 TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
137 TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
141 long tls1_default_timeout(void)
143 /* 2 hours, the 24 hours mentioned in the TLSv1 spec
144 * is way too long for http, the cache would over fill */
150 if (!ssl3_new(s)) return(0);
151 s->method->ssl_clear(s);
155 void tls1_free(SSL *s)
157 #ifndef OPENSSL_NO_TLSEXT
158 if (s->tlsext_session_ticket)
160 OPENSSL_free(s->tlsext_session_ticket);
162 #endif /* OPENSSL_NO_TLSEXT */
166 void tls1_clear(SSL *s)
169 s->version = s->method->version;
172 #ifndef OPENSSL_NO_EC
173 static int nid_list[] =
175 NID_sect163k1, /* sect163k1 (1) */
176 NID_sect163r1, /* sect163r1 (2) */
177 NID_sect163r2, /* sect163r2 (3) */
178 NID_sect193r1, /* sect193r1 (4) */
179 NID_sect193r2, /* sect193r2 (5) */
180 NID_sect233k1, /* sect233k1 (6) */
181 NID_sect233r1, /* sect233r1 (7) */
182 NID_sect239k1, /* sect239k1 (8) */
183 NID_sect283k1, /* sect283k1 (9) */
184 NID_sect283r1, /* sect283r1 (10) */
185 NID_sect409k1, /* sect409k1 (11) */
186 NID_sect409r1, /* sect409r1 (12) */
187 NID_sect571k1, /* sect571k1 (13) */
188 NID_sect571r1, /* sect571r1 (14) */
189 NID_secp160k1, /* secp160k1 (15) */
190 NID_secp160r1, /* secp160r1 (16) */
191 NID_secp160r2, /* secp160r2 (17) */
192 NID_secp192k1, /* secp192k1 (18) */
193 NID_X9_62_prime192v1, /* secp192r1 (19) */
194 NID_secp224k1, /* secp224k1 (20) */
195 NID_secp224r1, /* secp224r1 (21) */
196 NID_secp256k1, /* secp256k1 (22) */
197 NID_X9_62_prime256v1, /* secp256r1 (23) */
198 NID_secp384r1, /* secp384r1 (24) */
199 NID_secp521r1 /* secp521r1 (25) */
202 int tls1_ec_curve_id2nid(int curve_id)
204 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
205 if ((curve_id < 1) || ((unsigned int)curve_id >
206 sizeof(nid_list)/sizeof(nid_list[0])))
208 return nid_list[curve_id-1];
211 int tls1_ec_nid2curve_id(int nid)
213 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
216 case NID_sect163k1: /* sect163k1 (1) */
218 case NID_sect163r1: /* sect163r1 (2) */
220 case NID_sect163r2: /* sect163r2 (3) */
222 case NID_sect193r1: /* sect193r1 (4) */
224 case NID_sect193r2: /* sect193r2 (5) */
226 case NID_sect233k1: /* sect233k1 (6) */
228 case NID_sect233r1: /* sect233r1 (7) */
230 case NID_sect239k1: /* sect239k1 (8) */
232 case NID_sect283k1: /* sect283k1 (9) */
234 case NID_sect283r1: /* sect283r1 (10) */
236 case NID_sect409k1: /* sect409k1 (11) */
238 case NID_sect409r1: /* sect409r1 (12) */
240 case NID_sect571k1: /* sect571k1 (13) */
242 case NID_sect571r1: /* sect571r1 (14) */
244 case NID_secp160k1: /* secp160k1 (15) */
246 case NID_secp160r1: /* secp160r1 (16) */
248 case NID_secp160r2: /* secp160r2 (17) */
250 case NID_secp192k1: /* secp192k1 (18) */
252 case NID_X9_62_prime192v1: /* secp192r1 (19) */
254 case NID_secp224k1: /* secp224k1 (20) */
256 case NID_secp224r1: /* secp224r1 (21) */
258 case NID_secp256k1: /* secp256k1 (22) */
260 case NID_X9_62_prime256v1: /* secp256r1 (23) */
262 case NID_secp384r1: /* secp384r1 (24) */
264 case NID_secp521r1: /* secp521r1 (25) */
270 #endif /* OPENSSL_NO_EC */
272 #ifndef OPENSSL_NO_TLSEXT
274 /* List of supported signature algorithms and hashes. Should make this
275 * customisable at some point, for now include everything we support.
278 #ifdef OPENSSL_NO_RSA
279 #define tlsext_sigalg_rsa(md) /* */
281 #define tlsext_sigalg_rsa(md) md, TLSEXT_signature_rsa,
284 #ifdef OPENSSL_NO_DSA
285 #define tlsext_sigalg_dsa(md) /* */
287 #define tlsext_sigalg_dsa(md) md, TLSEXT_signature_dsa,
290 #ifdef OPENSSL_NO_ECDSA
291 #define tlsext_sigalg_ecdsa(md) /* */
293 #define tlsext_sigalg_ecdsa(md) md, TLSEXT_signature_dsa,
296 #define tlsext_sigalg(md) \
297 tlsext_sigalg_rsa(md) \
298 tlsext_sigalg_dsa(md) \
299 tlsext_sigalg_ecdsa(md)
301 static unsigned char tls12_sigalgs[] = {
302 #ifndef OPENSSL_NO_SHA512
303 tlsext_sigalg(TLSEXT_hash_sha512)
304 tlsext_sigalg(TLSEXT_hash_sha384)
306 #ifndef OPENSSL_NO_SHA256
307 tlsext_sigalg(TLSEXT_hash_sha256)
308 tlsext_sigalg(TLSEXT_hash_sha224)
310 #ifndef OPENSSL_NO_SHA
311 tlsext_sigalg(TLSEXT_hash_sha1)
313 #ifndef OPENSSL_NO_MD5
314 tlsext_sigalg_rsa(TLSEXT_hash_md5)
318 int tls12_get_req_sig_algs(SSL *s, unsigned char *p)
320 size_t slen = sizeof(tls12_sigalgs);
322 /* If FIPS mode don't include MD5 which is last */
327 memcpy(p, tls12_sigalgs, slen);
331 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
334 unsigned char *ret = p;
336 /* don't add extensions for SSLv3 unless doing secure renegotiation */
337 if (s->client_version == SSL3_VERSION
338 && !s->s3->send_connection_binding)
343 if (ret>=limit) return NULL; /* this really never occurs, but ... */
345 if (s->tlsext_hostname != NULL)
347 /* Add TLS extension servername to the Client Hello message */
348 unsigned long size_str;
351 /* check for enough space.
352 4 for the servername type and entension length
353 2 for servernamelist length
354 1 for the hostname type
355 2 for hostname length
359 if ((lenmax = limit - ret - 9) < 0
360 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
363 /* extension type and length */
364 s2n(TLSEXT_TYPE_server_name,ret);
367 /* length of servername list */
370 /* hostname type, length and hostname */
371 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
373 memcpy(ret, s->tlsext_hostname, size_str);
377 /* Add RI if renegotiating */
382 if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
384 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
388 if((limit - p - 4 - el) < 0) return NULL;
390 s2n(TLSEXT_TYPE_renegotiate,ret);
393 if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
395 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
402 #ifndef OPENSSL_NO_SRP
403 #define MIN(x,y) (((x)<(y))?(x):(y))
404 /* we add SRP username the first time only if we have one! */
405 if (s->srp_ctx.login != NULL)
406 {/* Add TLS extension SRP username to the Client Hello message */
407 int login_len = MIN(strlen(s->srp_ctx.login) + 1, 255);
410 if ((lenmax = limit - ret - 5) < 0) return NULL;
411 if (login_len > lenmax) return NULL;
414 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
417 s2n(TLSEXT_TYPE_srp,ret);
418 s2n(login_len+1,ret);
420 (*ret++) = (unsigned char) MIN(strlen(s->srp_ctx.login), 254);
421 memcpy(ret, s->srp_ctx.login, MIN(strlen(s->srp_ctx.login), 254));
426 #ifndef OPENSSL_NO_EC
427 if (s->tlsext_ecpointformatlist != NULL &&
428 s->version != DTLS1_VERSION)
430 /* Add TLS extension ECPointFormats to the ClientHello message */
433 if ((lenmax = limit - ret - 5) < 0) return NULL;
434 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
435 if (s->tlsext_ecpointformatlist_length > 255)
437 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
441 s2n(TLSEXT_TYPE_ec_point_formats,ret);
442 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
443 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
444 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
445 ret+=s->tlsext_ecpointformatlist_length;
447 if (s->tlsext_ellipticcurvelist != NULL &&
448 s->version != DTLS1_VERSION)
450 /* Add TLS extension EllipticCurves to the ClientHello message */
453 if ((lenmax = limit - ret - 6) < 0) return NULL;
454 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
455 if (s->tlsext_ellipticcurvelist_length > 65532)
457 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
461 s2n(TLSEXT_TYPE_elliptic_curves,ret);
462 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
464 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
465 * elliptic_curve_list, but the examples use two bytes.
466 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
467 * resolves this to two bytes.
469 s2n(s->tlsext_ellipticcurvelist_length, ret);
470 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
471 ret+=s->tlsext_ellipticcurvelist_length;
473 #endif /* OPENSSL_NO_EC */
475 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
478 if (!s->new_session && s->session && s->session->tlsext_tick)
479 ticklen = s->session->tlsext_ticklen;
480 else if (s->session && s->tlsext_session_ticket &&
481 s->tlsext_session_ticket->data)
483 ticklen = s->tlsext_session_ticket->length;
484 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
485 if (!s->session->tlsext_tick)
487 memcpy(s->session->tlsext_tick,
488 s->tlsext_session_ticket->data,
490 s->session->tlsext_ticklen = ticklen;
494 if (ticklen == 0 && s->tlsext_session_ticket &&
495 s->tlsext_session_ticket->data == NULL)
497 /* Check for enough room 2 for extension type, 2 for len
500 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
501 s2n(TLSEXT_TYPE_session_ticket,ret);
505 memcpy(ret, s->session->tlsext_tick, ticklen);
511 if (TLS1_get_version(s) >= TLS1_2_VERSION)
513 if ((size_t)(limit - ret) < sizeof(tls12_sigalgs) + 6)
515 s2n(TLSEXT_TYPE_signature_algorithms,ret);
516 s2n(sizeof(tls12_sigalgs) + 2, ret);
517 s2n(sizeof(tls12_sigalgs), ret);
518 memcpy(ret, tls12_sigalgs, sizeof(tls12_sigalgs));
519 ret += sizeof(tls12_sigalgs);
522 #ifdef TLSEXT_TYPE_opaque_prf_input
523 if (s->s3->client_opaque_prf_input != NULL &&
524 s->version != DTLS1_VERSION)
526 size_t col = s->s3->client_opaque_prf_input_len;
528 if ((long)(limit - ret - 6 - col < 0))
530 if (col > 0xFFFD) /* can't happen */
533 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
536 memcpy(ret, s->s3->client_opaque_prf_input, col);
541 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
542 s->version != DTLS1_VERSION)
545 long extlen, idlen, itmp;
549 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
551 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
552 itmp = i2d_OCSP_RESPID(id, NULL);
558 if (s->tlsext_ocsp_exts)
560 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
567 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
568 s2n(TLSEXT_TYPE_status_request, ret);
569 if (extlen + idlen > 0xFFF0)
571 s2n(extlen + idlen + 5, ret);
572 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
574 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
576 /* save position of id len */
577 unsigned char *q = ret;
578 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
579 /* skip over id len */
581 itmp = i2d_OCSP_RESPID(id, &ret);
587 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
590 if ((extdatalen = ret-p-2)== 0)
597 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
600 unsigned char *ret = p;
602 /* don't add extensions for SSLv3, unless doing secure renegotiation */
603 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
607 if (ret>=limit) return NULL; /* this really never occurs, but ... */
609 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
611 if ((long)(limit - ret - 4) < 0) return NULL;
613 s2n(TLSEXT_TYPE_server_name,ret);
617 if(s->s3->send_connection_binding)
621 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
623 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
627 if((limit - p - 4 - el) < 0) return NULL;
629 s2n(TLSEXT_TYPE_renegotiate,ret);
632 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
634 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
641 #ifndef OPENSSL_NO_EC
642 if (s->tlsext_ecpointformatlist != NULL &&
643 s->version != DTLS1_VERSION)
645 /* Add TLS extension ECPointFormats to the ServerHello message */
648 if ((lenmax = limit - ret - 5) < 0) return NULL;
649 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
650 if (s->tlsext_ecpointformatlist_length > 255)
652 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
656 s2n(TLSEXT_TYPE_ec_point_formats,ret);
657 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
658 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
659 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
660 ret+=s->tlsext_ecpointformatlist_length;
663 /* Currently the server should not respond with a SupportedCurves extension */
664 #endif /* OPENSSL_NO_EC */
666 if (s->tlsext_ticket_expected
667 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
669 if ((long)(limit - ret - 4) < 0) return NULL;
670 s2n(TLSEXT_TYPE_session_ticket,ret);
674 if (s->tlsext_status_expected)
676 if ((long)(limit - ret - 4) < 0) return NULL;
677 s2n(TLSEXT_TYPE_status_request,ret);
681 #ifdef TLSEXT_TYPE_opaque_prf_input
682 if (s->s3->server_opaque_prf_input != NULL &&
683 s->version != DTLS1_VERSION)
685 size_t sol = s->s3->server_opaque_prf_input_len;
687 if ((long)(limit - ret - 6 - sol) < 0)
689 if (sol > 0xFFFD) /* can't happen */
692 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
695 memcpy(ret, s->s3->server_opaque_prf_input, sol);
699 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
700 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
701 { const unsigned char cryptopro_ext[36] = {
702 0xfd, 0xe8, /*65000*/
703 0x00, 0x20, /*32 bytes length*/
704 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
705 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
706 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
707 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
708 if (limit-ret<36) return NULL;
709 memcpy(ret,cryptopro_ext,36);
714 if ((extdatalen = ret-p-2)== 0)
721 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
726 unsigned char *data = *p;
727 int renegotiate_seen = 0;
730 s->servername_done = 0;
731 s->tlsext_status_type = -1;
737 if (data > (d+n-len))
740 while (data <= (d+n-4))
745 if (data+size > (d+n))
748 fprintf(stderr,"Received extension type %d size %d\n",type,size);
750 if (s->tlsext_debug_cb)
751 s->tlsext_debug_cb(s, 0, type, data, size,
752 s->tlsext_debug_arg);
753 /* The servername extension is treated as follows:
755 - Only the hostname type is supported with a maximum length of 255.
756 - The servername is rejected if too long or if it contains zeros,
757 in which case an fatal alert is generated.
758 - The servername field is maintained together with the session cache.
759 - When a session is resumed, the servername call back invoked in order
760 to allow the application to position itself to the right context.
761 - The servername is acknowledged if it is new for a session or when
762 it is identical to a previously used for the same session.
763 Applications can control the behaviour. They can at any time
764 set a 'desirable' servername for a new SSL object. This can be the
765 case for example with HTTPS when a Host: header field is received and
766 a renegotiation is requested. In this case, a possible servername
767 presented in the new client hello is only acknowledged if it matches
768 the value of the Host: field.
769 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
770 if they provide for changing an explicit servername context for the session,
771 i.e. when the session has been established with a servername extension.
772 - On session reconnect, the servername extension may be absent.
776 if (type == TLSEXT_TYPE_server_name)
778 unsigned char *sdata;
784 *al = SSL_AD_DECODE_ERROR;
791 *al = SSL_AD_DECODE_ERROR;
798 servname_type = *(sdata++);
804 *al = SSL_AD_DECODE_ERROR;
807 if (s->servername_done == 0)
808 switch (servname_type)
810 case TLSEXT_NAMETYPE_host_name:
813 if(s->session->tlsext_hostname)
815 *al = SSL_AD_DECODE_ERROR;
818 if (len > TLSEXT_MAXLEN_host_name)
820 *al = TLS1_AD_UNRECOGNIZED_NAME;
823 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
825 *al = TLS1_AD_INTERNAL_ERROR;
828 memcpy(s->session->tlsext_hostname, sdata, len);
829 s->session->tlsext_hostname[len]='\0';
830 if (strlen(s->session->tlsext_hostname) != len) {
831 OPENSSL_free(s->session->tlsext_hostname);
832 s->session->tlsext_hostname = NULL;
833 *al = TLS1_AD_UNRECOGNIZED_NAME;
836 s->servername_done = 1;
840 s->servername_done = s->session->tlsext_hostname
841 && strlen(s->session->tlsext_hostname) == len
842 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
854 *al = SSL_AD_DECODE_ERROR;
859 #ifndef OPENSSL_NO_SRP
860 else if (type == TLSEXT_TYPE_srp)
865 if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
867 memcpy(s->srp_ctx.login, &data[1], len);
868 s->srp_ctx.login[len]='\0';
873 #ifndef OPENSSL_NO_EC
874 else if (type == TLSEXT_TYPE_ec_point_formats &&
875 s->version != DTLS1_VERSION)
877 unsigned char *sdata = data;
878 int ecpointformatlist_length = *(sdata++);
880 if (ecpointformatlist_length != size - 1)
882 *al = TLS1_AD_DECODE_ERROR;
887 if(s->session->tlsext_ecpointformatlist)
889 OPENSSL_free(s->session->tlsext_ecpointformatlist);
890 s->session->tlsext_ecpointformatlist = NULL;
892 s->session->tlsext_ecpointformatlist_length = 0;
893 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
895 *al = TLS1_AD_INTERNAL_ERROR;
898 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
899 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
902 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
903 sdata = s->session->tlsext_ecpointformatlist;
904 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
905 fprintf(stderr,"%i ",*(sdata++));
906 fprintf(stderr,"\n");
909 else if (type == TLSEXT_TYPE_elliptic_curves &&
910 s->version != DTLS1_VERSION)
912 unsigned char *sdata = data;
913 int ellipticcurvelist_length = (*(sdata++) << 8);
914 ellipticcurvelist_length += (*(sdata++));
916 if (ellipticcurvelist_length != size - 2)
918 *al = TLS1_AD_DECODE_ERROR;
923 if(s->session->tlsext_ellipticcurvelist)
925 *al = TLS1_AD_DECODE_ERROR;
928 s->session->tlsext_ellipticcurvelist_length = 0;
929 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
931 *al = TLS1_AD_INTERNAL_ERROR;
934 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
935 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
938 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
939 sdata = s->session->tlsext_ellipticcurvelist;
940 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
941 fprintf(stderr,"%i ",*(sdata++));
942 fprintf(stderr,"\n");
945 #endif /* OPENSSL_NO_EC */
946 #ifdef TLSEXT_TYPE_opaque_prf_input
947 else if (type == TLSEXT_TYPE_opaque_prf_input &&
948 s->version != DTLS1_VERSION)
950 unsigned char *sdata = data;
954 *al = SSL_AD_DECODE_ERROR;
957 n2s(sdata, s->s3->client_opaque_prf_input_len);
958 if (s->s3->client_opaque_prf_input_len != size - 2)
960 *al = SSL_AD_DECODE_ERROR;
964 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
965 OPENSSL_free(s->s3->client_opaque_prf_input);
966 if (s->s3->client_opaque_prf_input_len == 0)
967 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
969 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
970 if (s->s3->client_opaque_prf_input == NULL)
972 *al = TLS1_AD_INTERNAL_ERROR;
977 else if (type == TLSEXT_TYPE_session_ticket)
979 if (s->tls_session_ticket_ext_cb &&
980 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
982 *al = TLS1_AD_INTERNAL_ERROR;
986 else if (type == TLSEXT_TYPE_renegotiate)
988 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
990 renegotiate_seen = 1;
992 else if (type == TLSEXT_TYPE_signature_algorithms)
995 if (sigalg_seen || size < 2)
997 *al = SSL_AD_DECODE_ERROR;
1003 if (dsize != size || dsize & 1)
1005 *al = SSL_AD_DECODE_ERROR;
1008 if (!tls1_process_sigalgs(s, data, dsize))
1010 *al = SSL_AD_DECODE_ERROR;
1014 else if (type == TLSEXT_TYPE_status_request &&
1015 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
1020 *al = SSL_AD_DECODE_ERROR;
1024 s->tlsext_status_type = *data++;
1026 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
1028 const unsigned char *sdata;
1030 /* Read in responder_id_list */
1035 *al = SSL_AD_DECODE_ERROR;
1044 *al = SSL_AD_DECODE_ERROR;
1048 dsize -= 2 + idsize;
1052 *al = SSL_AD_DECODE_ERROR;
1057 id = d2i_OCSP_RESPID(NULL,
1061 *al = SSL_AD_DECODE_ERROR;
1066 OCSP_RESPID_free(id);
1067 *al = SSL_AD_DECODE_ERROR;
1070 if (!s->tlsext_ocsp_ids
1071 && !(s->tlsext_ocsp_ids =
1072 sk_OCSP_RESPID_new_null()))
1074 OCSP_RESPID_free(id);
1075 *al = SSL_AD_INTERNAL_ERROR;
1078 if (!sk_OCSP_RESPID_push(
1079 s->tlsext_ocsp_ids, id))
1081 OCSP_RESPID_free(id);
1082 *al = SSL_AD_INTERNAL_ERROR;
1087 /* Read in request_extensions */
1090 *al = SSL_AD_DECODE_ERROR;
1097 *al = SSL_AD_DECODE_ERROR;
1103 s->tlsext_ocsp_exts =
1104 d2i_X509_EXTENSIONS(NULL,
1106 if (!s->tlsext_ocsp_exts
1107 || (data + dsize != sdata))
1109 *al = SSL_AD_DECODE_ERROR;
1114 /* We don't know what to do with any other type
1118 s->tlsext_status_type = -1;
1121 /* session ticket processed earlier */
1129 /* Need RI if renegotiating */
1131 if (!renegotiate_seen && s->renegotiate &&
1132 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1134 *al = SSL_AD_HANDSHAKE_FAILURE;
1135 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
1136 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1143 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1145 unsigned short length;
1146 unsigned short type;
1147 unsigned short size;
1148 unsigned char *data = *p;
1149 int tlsext_servername = 0;
1150 int renegotiate_seen = 0;
1152 if (data >= (d+n-2))
1156 if (data+length != d+n)
1158 *al = SSL_AD_DECODE_ERROR;
1162 while(data <= (d+n-4))
1167 if (data+size > (d+n))
1170 if (s->tlsext_debug_cb)
1171 s->tlsext_debug_cb(s, 1, type, data, size,
1172 s->tlsext_debug_arg);
1174 if (type == TLSEXT_TYPE_server_name)
1176 if (s->tlsext_hostname == NULL || size > 0)
1178 *al = TLS1_AD_UNRECOGNIZED_NAME;
1181 tlsext_servername = 1;
1184 #ifndef OPENSSL_NO_EC
1185 else if (type == TLSEXT_TYPE_ec_point_formats &&
1186 s->version != DTLS1_VERSION)
1188 unsigned char *sdata = data;
1189 int ecpointformatlist_length = *(sdata++);
1191 if (ecpointformatlist_length != size - 1)
1193 *al = TLS1_AD_DECODE_ERROR;
1196 s->session->tlsext_ecpointformatlist_length = 0;
1197 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1198 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1200 *al = TLS1_AD_INTERNAL_ERROR;
1203 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1204 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1206 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1207 sdata = s->session->tlsext_ecpointformatlist;
1208 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1209 fprintf(stderr,"%i ",*(sdata++));
1210 fprintf(stderr,"\n");
1213 #endif /* OPENSSL_NO_EC */
1215 else if (type == TLSEXT_TYPE_session_ticket)
1217 if (s->tls_session_ticket_ext_cb &&
1218 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1220 *al = TLS1_AD_INTERNAL_ERROR;
1223 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1226 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1229 s->tlsext_ticket_expected = 1;
1231 #ifdef TLSEXT_TYPE_opaque_prf_input
1232 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1233 s->version != DTLS1_VERSION)
1235 unsigned char *sdata = data;
1239 *al = SSL_AD_DECODE_ERROR;
1242 n2s(sdata, s->s3->server_opaque_prf_input_len);
1243 if (s->s3->server_opaque_prf_input_len != size - 2)
1245 *al = SSL_AD_DECODE_ERROR;
1249 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1250 OPENSSL_free(s->s3->server_opaque_prf_input);
1251 if (s->s3->server_opaque_prf_input_len == 0)
1252 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1254 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1256 if (s->s3->server_opaque_prf_input == NULL)
1258 *al = TLS1_AD_INTERNAL_ERROR;
1263 else if (type == TLSEXT_TYPE_status_request &&
1264 s->version != DTLS1_VERSION)
1266 /* MUST be empty and only sent if we've requested
1267 * a status request message.
1269 if ((s->tlsext_status_type == -1) || (size > 0))
1271 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1274 /* Set flag to expect CertificateStatus message */
1275 s->tlsext_status_expected = 1;
1277 else if (type == TLSEXT_TYPE_renegotiate)
1279 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1281 renegotiate_seen = 1;
1288 *al = SSL_AD_DECODE_ERROR;
1292 if (!s->hit && tlsext_servername == 1)
1294 if (s->tlsext_hostname)
1296 if (s->session->tlsext_hostname == NULL)
1298 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1299 if (!s->session->tlsext_hostname)
1301 *al = SSL_AD_UNRECOGNIZED_NAME;
1307 *al = SSL_AD_DECODE_ERROR;
1317 /* Determine if we need to see RI. Strictly speaking if we want to
1318 * avoid an attack we should *always* see RI even on initial server
1319 * hello because the client doesn't see any renegotiation during an
1320 * attack. However this would mean we could not connect to any server
1321 * which doesn't support RI so for the immediate future tolerate RI
1322 * absence on initial connect only.
1324 if (!renegotiate_seen
1325 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
1326 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1328 *al = SSL_AD_HANDSHAKE_FAILURE;
1329 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
1330 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1338 int ssl_prepare_clienthello_tlsext(SSL *s)
1340 #ifndef OPENSSL_NO_EC
1341 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1342 * and elliptic curves we support.
1347 unsigned long alg_k, alg_a;
1348 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1350 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1352 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1354 alg_k = c->algorithm_mkey;
1355 alg_a = c->algorithm_auth;
1356 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1362 using_ecc = using_ecc && (s->version >= TLS1_VERSION);
1365 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1366 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1368 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1371 s->tlsext_ecpointformatlist_length = 3;
1372 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1373 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1374 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1376 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1377 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1378 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1379 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1381 s->tlsext_ellipticcurvelist_length = 0;
1382 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1385 for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <=
1386 sizeof(nid_list)/sizeof(nid_list[0]); i++)
1389 #endif /* OPENSSL_NO_EC */
1391 #ifdef TLSEXT_TYPE_opaque_prf_input
1395 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1397 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1402 if (s->tlsext_opaque_prf_input != NULL)
1404 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1405 OPENSSL_free(s->s3->client_opaque_prf_input);
1407 if (s->tlsext_opaque_prf_input_len == 0)
1408 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1410 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1411 if (s->s3->client_opaque_prf_input == NULL)
1413 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1416 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1420 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1421 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1428 int ssl_prepare_serverhello_tlsext(SSL *s)
1430 #ifndef OPENSSL_NO_EC
1431 /* If we are server and using an ECC cipher suite, send the point formats we support
1432 * if the client sent us an ECPointsFormat extension. Note that the server is not
1433 * supposed to send an EllipticCurves extension.
1436 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1437 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1438 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1439 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1443 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1444 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1446 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1449 s->tlsext_ecpointformatlist_length = 3;
1450 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1451 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1452 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1454 #endif /* OPENSSL_NO_EC */
1459 int ssl_check_clienthello_tlsext(SSL *s)
1461 int ret=SSL_TLSEXT_ERR_NOACK;
1462 int al = SSL_AD_UNRECOGNIZED_NAME;
1464 #ifndef OPENSSL_NO_EC
1465 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1466 * ssl3_choose_cipher in s3_lib.c.
1468 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1469 * ssl3_choose_cipher in s3_lib.c.
1473 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1474 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1475 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1476 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1478 /* If status request then ask callback what to do.
1479 * Note: this must be called after servername callbacks in case
1480 * the certificate has changed.
1482 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1485 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1488 /* We don't want to send a status request response */
1489 case SSL_TLSEXT_ERR_NOACK:
1490 s->tlsext_status_expected = 0;
1492 /* status request response should be sent */
1493 case SSL_TLSEXT_ERR_OK:
1494 if (s->tlsext_ocsp_resp)
1495 s->tlsext_status_expected = 1;
1497 s->tlsext_status_expected = 0;
1499 /* something bad happened */
1500 case SSL_TLSEXT_ERR_ALERT_FATAL:
1501 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1502 al = SSL_AD_INTERNAL_ERROR;
1507 s->tlsext_status_expected = 0;
1509 #ifdef TLSEXT_TYPE_opaque_prf_input
1511 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1512 * but we might be sending an alert in response to the client hello,
1513 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1517 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1519 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1522 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1523 al = SSL_AD_INTERNAL_ERROR;
1528 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1529 OPENSSL_free(s->s3->server_opaque_prf_input);
1530 s->s3->server_opaque_prf_input = NULL;
1532 if (s->tlsext_opaque_prf_input != NULL)
1534 if (s->s3->client_opaque_prf_input != NULL &&
1535 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1537 /* can only use this extension if we have a server opaque PRF input
1538 * of the same length as the client opaque PRF input! */
1540 if (s->tlsext_opaque_prf_input_len == 0)
1541 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1543 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1544 if (s->s3->server_opaque_prf_input == NULL)
1546 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1547 al = SSL_AD_INTERNAL_ERROR;
1550 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1554 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1556 /* The callback wants to enforce use of the extension,
1557 * but we can't do that with the client opaque PRF input;
1558 * abort the handshake.
1560 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1561 al = SSL_AD_HANDSHAKE_FAILURE;
1569 case SSL_TLSEXT_ERR_ALERT_FATAL:
1570 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1573 case SSL_TLSEXT_ERR_ALERT_WARNING:
1574 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1577 case SSL_TLSEXT_ERR_NOACK:
1578 s->servername_done=0;
1584 int ssl_check_serverhello_tlsext(SSL *s)
1586 int ret=SSL_TLSEXT_ERR_NOACK;
1587 int al = SSL_AD_UNRECOGNIZED_NAME;
1589 #ifndef OPENSSL_NO_EC
1590 /* If we are client and using an elliptic curve cryptography cipher
1591 * suite, then if server returns an EC point formats lists extension
1592 * it must contain uncompressed.
1594 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1595 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1596 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1597 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
1598 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1600 /* we are using an ECC cipher */
1602 unsigned char *list;
1603 int found_uncompressed = 0;
1604 list = s->session->tlsext_ecpointformatlist;
1605 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1607 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1609 found_uncompressed = 1;
1613 if (!found_uncompressed)
1615 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1619 ret = SSL_TLSEXT_ERR_OK;
1620 #endif /* OPENSSL_NO_EC */
1622 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1623 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1624 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1625 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1627 #ifdef TLSEXT_TYPE_opaque_prf_input
1628 if (s->s3->server_opaque_prf_input_len > 0)
1630 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1631 * So first verify that we really have a value from the server too. */
1633 if (s->s3->server_opaque_prf_input == NULL)
1635 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1636 al = SSL_AD_HANDSHAKE_FAILURE;
1639 /* Anytime the server *has* sent an opaque PRF input, we need to check
1640 * that we have a client opaque PRF input of the same size. */
1641 if (s->s3->client_opaque_prf_input == NULL ||
1642 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1644 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1645 al = SSL_AD_ILLEGAL_PARAMETER;
1650 /* If we've requested certificate status and we wont get one
1653 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1654 && s->ctx && s->ctx->tlsext_status_cb)
1657 /* Set resp to NULL, resplen to -1 so callback knows
1658 * there is no response.
1660 if (s->tlsext_ocsp_resp)
1662 OPENSSL_free(s->tlsext_ocsp_resp);
1663 s->tlsext_ocsp_resp = NULL;
1665 s->tlsext_ocsp_resplen = -1;
1666 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1669 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1670 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1674 al = SSL_AD_INTERNAL_ERROR;
1675 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1681 case SSL_TLSEXT_ERR_ALERT_FATAL:
1682 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1685 case SSL_TLSEXT_ERR_ALERT_WARNING:
1686 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1689 case SSL_TLSEXT_ERR_NOACK:
1690 s->servername_done=0;
1696 /* Since the server cache lookup is done early on in the processing of client
1697 * hello and other operations depend on the result we need to handle any TLS
1698 * session ticket extension at the same time.
1701 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1702 const unsigned char *limit, SSL_SESSION **ret)
1704 /* Point after session ID in client hello */
1705 const unsigned char *p = session_id + len;
1708 /* If tickets disabled behave as if no ticket present
1709 * to permit stateful resumption.
1711 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1714 if ((s->version <= SSL3_VERSION) || !limit)
1718 /* Skip past DTLS cookie */
1719 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
1726 /* Skip past cipher list */
1731 /* Skip past compression algorithm list */
1736 /* Now at start of extensions */
1737 if ((p + 2) >= limit)
1740 while ((p + 4) <= limit)
1742 unsigned short type, size;
1745 if (p + size > limit)
1747 if (type == TLSEXT_TYPE_session_ticket)
1749 /* If tickets disabled indicate cache miss which will
1750 * trigger a full handshake
1752 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1754 /* If zero length note client will accept a ticket
1755 * and indicate cache miss to trigger full handshake
1759 s->tlsext_ticket_expected = 1;
1760 return 0; /* Cache miss */
1762 if (s->tls_session_secret_cb)
1764 /* Indicate cache miss here and instead of
1765 * generating the session from ticket now,
1766 * trigger abbreviated handshake based on
1767 * external mechanism to calculate the master
1771 return tls_decrypt_ticket(s, p, size, session_id, len,
1779 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1780 const unsigned char *sess_id, int sesslen,
1781 SSL_SESSION **psess)
1784 unsigned char *sdec;
1785 const unsigned char *p;
1786 int slen, mlen, renew_ticket = 0;
1787 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1790 SSL_CTX *tctx = s->initial_ctx;
1791 /* Need at least keyname + iv + some encrypted data */
1794 /* Initialize session ticket encryption and HMAC contexts */
1795 HMAC_CTX_init(&hctx);
1796 EVP_CIPHER_CTX_init(&ctx);
1797 if (tctx->tlsext_ticket_key_cb)
1799 unsigned char *nctick = (unsigned char *)etick;
1800 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
1811 /* Check key name matches */
1812 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
1814 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1815 tlsext_tick_md(), NULL);
1816 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1817 tctx->tlsext_tick_aes_key, etick + 16);
1819 /* Attempt to process session ticket, first conduct sanity and
1820 * integrity checks on ticket.
1822 mlen = HMAC_size(&hctx);
1825 EVP_CIPHER_CTX_cleanup(&ctx);
1829 /* Check HMAC of encrypted ticket */
1830 HMAC_Update(&hctx, etick, eticklen);
1831 HMAC_Final(&hctx, tick_hmac, NULL);
1832 HMAC_CTX_cleanup(&hctx);
1833 if (memcmp(tick_hmac, etick + eticklen, mlen))
1835 /* Attempt to decrypt session data */
1836 /* Move p after IV to start of encrypted ticket, update length */
1837 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1838 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1839 sdec = OPENSSL_malloc(eticklen);
1842 EVP_CIPHER_CTX_cleanup(&ctx);
1845 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1846 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1849 EVP_CIPHER_CTX_cleanup(&ctx);
1852 sess = d2i_SSL_SESSION(NULL, &p, slen);
1856 /* The session ID if non-empty is used by some clients to
1857 * detect that the ticket has been accepted. So we copy it to
1858 * the session structure. If it is empty set length to zero
1859 * as required by standard.
1862 memcpy(sess->session_id, sess_id, sesslen);
1863 sess->session_id_length = sesslen;
1865 s->tlsext_ticket_expected = renew_ticket;
1868 /* If session decrypt failure indicate a cache miss and set state to
1872 s->tlsext_ticket_expected = 1;
1876 /* Tables to translate from NIDs to TLS v1.2 ids */
1884 static tls12_lookup tls12_md[] = {
1885 #ifndef OPENSSL_NO_MD5
1886 {NID_md5, TLSEXT_hash_md5},
1888 #ifndef OPENSSL_NO_SHA
1889 {NID_sha1, TLSEXT_hash_sha1},
1891 #ifndef OPENSSL_NO_SHA256
1892 {NID_sha224, TLSEXT_hash_sha224},
1893 {NID_sha256, TLSEXT_hash_sha256},
1895 #ifndef OPENSSL_NO_SHA512
1896 {NID_sha384, TLSEXT_hash_sha384},
1897 {NID_sha512, TLSEXT_hash_sha512}
1901 static tls12_lookup tls12_sig[] = {
1902 #ifndef OPENSSL_NO_RSA
1903 {EVP_PKEY_RSA, TLSEXT_signature_rsa},
1905 #ifndef OPENSSL_NO_RSA
1906 {EVP_PKEY_DSA, TLSEXT_signature_dsa},
1908 #ifndef OPENSSL_NO_ECDSA
1909 {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
1913 static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
1916 for (i = 0; i < tlen; i++)
1918 if (table[i].nid == nid)
1924 static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen)
1927 for (i = 0; i < tlen; i++)
1929 if (table[i].id == id)
1930 return table[i].nid;
1936 int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
1939 md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
1940 sizeof(tls12_md)/sizeof(tls12_lookup));
1943 sig_id = tls12_get_sigid(pk);
1946 p[0] = (unsigned char)md_id;
1947 p[1] = (unsigned char)sig_id;
1951 int tls12_get_sigid(const EVP_PKEY *pk)
1953 return tls12_find_id(pk->type, tls12_sig,
1954 sizeof(tls12_sig)/sizeof(tls12_lookup));
1957 const EVP_MD *tls12_get_hash(unsigned char hash_alg)
1961 #ifndef OPENSSL_NO_MD5
1962 case TLSEXT_hash_md5:
1969 #ifndef OPENSSL_NO_SHA
1970 case TLSEXT_hash_sha1:
1973 #ifndef OPENSSL_NO_SHA256
1974 case TLSEXT_hash_sha224:
1975 return EVP_sha224();
1977 case TLSEXT_hash_sha256:
1978 return EVP_sha256();
1980 #ifndef OPENSSL_NO_SHA512
1981 case TLSEXT_hash_sha384:
1982 return EVP_sha384();
1984 case TLSEXT_hash_sha512:
1985 return EVP_sha512();
1993 /* Set preferred digest for each key type */
1995 int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
2000 /* Extension ignored for TLS versions below 1.2 */
2001 if (TLS1_get_version(s) < TLS1_2_VERSION)
2003 /* Should never happen */
2007 c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL;
2008 c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL;
2009 c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
2010 c->pkeys[SSL_PKEY_ECC].digest = NULL;
2012 for (i = 0; i < dsize; i += 2)
2014 unsigned char hash_alg = data[i], sig_alg = data[i+1];
2018 #ifndef OPENSSL_NO_RSA
2019 case TLSEXT_signature_rsa:
2020 idx = SSL_PKEY_RSA_SIGN;
2023 #ifndef OPENSSL_NO_DSA
2024 case TLSEXT_signature_dsa:
2025 idx = SSL_PKEY_DSA_SIGN;
2028 #ifndef OPENSSL_NO_ECDSA
2029 case TLSEXT_signature_ecdsa:
2037 if (c->pkeys[idx].digest == NULL)
2039 md = tls12_get_hash(hash_alg);
2042 c->pkeys[idx].digest = md;
2043 if (idx == SSL_PKEY_RSA_SIGN)
2044 c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
2051 /* Set any remaining keys to default values. NOTE: if alg is not
2052 * supported it stays as NULL.
2054 #ifndef OPENSSL_NO_DSA
2055 if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
2056 c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_dss1();
2058 #ifndef OPENSSL_NO_RSA
2059 if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
2061 c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
2062 c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
2065 #ifndef OPENSSL_NO_ECDSA
2066 if (!c->pkeys[SSL_PKEY_ECC].digest)
2067 c->pkeys[SSL_PKEY_ECC].digest = EVP_ecdsa();