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)
321 memcpy(p, tls12_sigalgs, sizeof(tls12_sigalgs));
322 return (int)sizeof(tls12_sigalgs);
325 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
328 unsigned char *ret = p;
330 /* don't add extensions for SSLv3 unless doing secure renegotiation */
331 if (s->client_version == SSL3_VERSION
332 && !s->s3->send_connection_binding)
337 if (ret>=limit) return NULL; /* this really never occurs, but ... */
339 if (s->tlsext_hostname != NULL)
341 /* Add TLS extension servername to the Client Hello message */
342 unsigned long size_str;
345 /* check for enough space.
346 4 for the servername type and entension length
347 2 for servernamelist length
348 1 for the hostname type
349 2 for hostname length
353 if ((lenmax = limit - ret - 9) < 0
354 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
357 /* extension type and length */
358 s2n(TLSEXT_TYPE_server_name,ret);
361 /* length of servername list */
364 /* hostname type, length and hostname */
365 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
367 memcpy(ret, s->tlsext_hostname, size_str);
371 /* Add RI if renegotiating */
376 if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
378 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
382 if((limit - p - 4 - el) < 0) return NULL;
384 s2n(TLSEXT_TYPE_renegotiate,ret);
387 if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
389 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
396 #ifndef OPENSSL_NO_SRP
397 #define MIN(x,y) (((x)<(y))?(x):(y))
398 /* we add SRP username the first time only if we have one! */
399 if (s->srp_ctx.login != NULL)
400 {/* Add TLS extension SRP username to the Client Hello message */
401 int login_len = MIN(strlen(s->srp_ctx.login) + 1, 255);
404 if ((lenmax = limit - ret - 5) < 0) return NULL;
405 if (login_len > lenmax) return NULL;
408 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
411 s2n(TLSEXT_TYPE_srp,ret);
412 s2n(login_len+1,ret);
414 (*ret++) = (unsigned char) MIN(strlen(s->srp_ctx.login), 254);
415 memcpy(ret, s->srp_ctx.login, MIN(strlen(s->srp_ctx.login), 254));
420 #ifndef OPENSSL_NO_EC
421 if (s->tlsext_ecpointformatlist != NULL &&
422 s->version != DTLS1_VERSION)
424 /* Add TLS extension ECPointFormats to the ClientHello message */
427 if ((lenmax = limit - ret - 5) < 0) return NULL;
428 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
429 if (s->tlsext_ecpointformatlist_length > 255)
431 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
435 s2n(TLSEXT_TYPE_ec_point_formats,ret);
436 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
437 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
438 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
439 ret+=s->tlsext_ecpointformatlist_length;
441 if (s->tlsext_ellipticcurvelist != NULL &&
442 s->version != DTLS1_VERSION)
444 /* Add TLS extension EllipticCurves to the ClientHello message */
447 if ((lenmax = limit - ret - 6) < 0) return NULL;
448 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
449 if (s->tlsext_ellipticcurvelist_length > 65532)
451 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
455 s2n(TLSEXT_TYPE_elliptic_curves,ret);
456 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
458 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
459 * elliptic_curve_list, but the examples use two bytes.
460 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
461 * resolves this to two bytes.
463 s2n(s->tlsext_ellipticcurvelist_length, ret);
464 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
465 ret+=s->tlsext_ellipticcurvelist_length;
467 #endif /* OPENSSL_NO_EC */
469 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
472 if (!s->new_session && s->session && s->session->tlsext_tick)
473 ticklen = s->session->tlsext_ticklen;
474 else if (s->session && s->tlsext_session_ticket &&
475 s->tlsext_session_ticket->data)
477 ticklen = s->tlsext_session_ticket->length;
478 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
479 if (!s->session->tlsext_tick)
481 memcpy(s->session->tlsext_tick,
482 s->tlsext_session_ticket->data,
484 s->session->tlsext_ticklen = ticklen;
488 if (ticklen == 0 && s->tlsext_session_ticket &&
489 s->tlsext_session_ticket->data == NULL)
491 /* Check for enough room 2 for extension type, 2 for len
494 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
495 s2n(TLSEXT_TYPE_session_ticket,ret);
499 memcpy(ret, s->session->tlsext_tick, ticklen);
505 if (TLS1_get_version(s) >= TLS1_2_VERSION)
507 if ((size_t)(limit - ret) < sizeof(tls12_sigalgs) + 6)
509 s2n(TLSEXT_TYPE_signature_algorithms,ret);
510 s2n(sizeof(tls12_sigalgs) + 2, ret);
511 s2n(sizeof(tls12_sigalgs), ret);
512 memcpy(ret, tls12_sigalgs, sizeof(tls12_sigalgs));
513 ret += sizeof(tls12_sigalgs);
516 #ifdef TLSEXT_TYPE_opaque_prf_input
517 if (s->s3->client_opaque_prf_input != NULL &&
518 s->version != DTLS1_VERSION)
520 size_t col = s->s3->client_opaque_prf_input_len;
522 if ((long)(limit - ret - 6 - col < 0))
524 if (col > 0xFFFD) /* can't happen */
527 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
530 memcpy(ret, s->s3->client_opaque_prf_input, col);
535 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
536 s->version != DTLS1_VERSION)
539 long extlen, idlen, itmp;
543 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
545 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
546 itmp = i2d_OCSP_RESPID(id, NULL);
552 if (s->tlsext_ocsp_exts)
554 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
561 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
562 s2n(TLSEXT_TYPE_status_request, ret);
563 if (extlen + idlen > 0xFFF0)
565 s2n(extlen + idlen + 5, ret);
566 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
568 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
570 /* save position of id len */
571 unsigned char *q = ret;
572 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
573 /* skip over id len */
575 itmp = i2d_OCSP_RESPID(id, &ret);
581 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
584 if ((extdatalen = ret-p-2)== 0)
591 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
594 unsigned char *ret = p;
596 /* don't add extensions for SSLv3, unless doing secure renegotiation */
597 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
601 if (ret>=limit) return NULL; /* this really never occurs, but ... */
603 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
605 if ((long)(limit - ret - 4) < 0) return NULL;
607 s2n(TLSEXT_TYPE_server_name,ret);
611 if(s->s3->send_connection_binding)
615 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
617 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
621 if((limit - p - 4 - el) < 0) return NULL;
623 s2n(TLSEXT_TYPE_renegotiate,ret);
626 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
628 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
635 #ifndef OPENSSL_NO_EC
636 if (s->tlsext_ecpointformatlist != NULL &&
637 s->version != DTLS1_VERSION)
639 /* Add TLS extension ECPointFormats to the ServerHello message */
642 if ((lenmax = limit - ret - 5) < 0) return NULL;
643 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
644 if (s->tlsext_ecpointformatlist_length > 255)
646 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
650 s2n(TLSEXT_TYPE_ec_point_formats,ret);
651 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
652 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
653 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
654 ret+=s->tlsext_ecpointformatlist_length;
657 /* Currently the server should not respond with a SupportedCurves extension */
658 #endif /* OPENSSL_NO_EC */
660 if (s->tlsext_ticket_expected
661 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
663 if ((long)(limit - ret - 4) < 0) return NULL;
664 s2n(TLSEXT_TYPE_session_ticket,ret);
668 if (s->tlsext_status_expected)
670 if ((long)(limit - ret - 4) < 0) return NULL;
671 s2n(TLSEXT_TYPE_status_request,ret);
675 #ifdef TLSEXT_TYPE_opaque_prf_input
676 if (s->s3->server_opaque_prf_input != NULL &&
677 s->version != DTLS1_VERSION)
679 size_t sol = s->s3->server_opaque_prf_input_len;
681 if ((long)(limit - ret - 6 - sol) < 0)
683 if (sol > 0xFFFD) /* can't happen */
686 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
689 memcpy(ret, s->s3->server_opaque_prf_input, sol);
693 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
694 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
695 { const unsigned char cryptopro_ext[36] = {
696 0xfd, 0xe8, /*65000*/
697 0x00, 0x20, /*32 bytes length*/
698 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
699 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
700 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
701 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
702 if (limit-ret<36) return NULL;
703 memcpy(ret,cryptopro_ext,36);
708 if ((extdatalen = ret-p-2)== 0)
715 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
720 unsigned char *data = *p;
721 int renegotiate_seen = 0;
724 s->servername_done = 0;
725 s->tlsext_status_type = -1;
731 if (data > (d+n-len))
734 while (data <= (d+n-4))
739 if (data+size > (d+n))
742 fprintf(stderr,"Received extension type %d size %d\n",type,size);
744 if (s->tlsext_debug_cb)
745 s->tlsext_debug_cb(s, 0, type, data, size,
746 s->tlsext_debug_arg);
747 /* The servername extension is treated as follows:
749 - Only the hostname type is supported with a maximum length of 255.
750 - The servername is rejected if too long or if it contains zeros,
751 in which case an fatal alert is generated.
752 - The servername field is maintained together with the session cache.
753 - When a session is resumed, the servername call back invoked in order
754 to allow the application to position itself to the right context.
755 - The servername is acknowledged if it is new for a session or when
756 it is identical to a previously used for the same session.
757 Applications can control the behaviour. They can at any time
758 set a 'desirable' servername for a new SSL object. This can be the
759 case for example with HTTPS when a Host: header field is received and
760 a renegotiation is requested. In this case, a possible servername
761 presented in the new client hello is only acknowledged if it matches
762 the value of the Host: field.
763 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
764 if they provide for changing an explicit servername context for the session,
765 i.e. when the session has been established with a servername extension.
766 - On session reconnect, the servername extension may be absent.
770 if (type == TLSEXT_TYPE_server_name)
772 unsigned char *sdata;
778 *al = SSL_AD_DECODE_ERROR;
785 *al = SSL_AD_DECODE_ERROR;
792 servname_type = *(sdata++);
798 *al = SSL_AD_DECODE_ERROR;
801 if (s->servername_done == 0)
802 switch (servname_type)
804 case TLSEXT_NAMETYPE_host_name:
807 if(s->session->tlsext_hostname)
809 *al = SSL_AD_DECODE_ERROR;
812 if (len > TLSEXT_MAXLEN_host_name)
814 *al = TLS1_AD_UNRECOGNIZED_NAME;
817 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
819 *al = TLS1_AD_INTERNAL_ERROR;
822 memcpy(s->session->tlsext_hostname, sdata, len);
823 s->session->tlsext_hostname[len]='\0';
824 if (strlen(s->session->tlsext_hostname) != len) {
825 OPENSSL_free(s->session->tlsext_hostname);
826 s->session->tlsext_hostname = NULL;
827 *al = TLS1_AD_UNRECOGNIZED_NAME;
830 s->servername_done = 1;
834 s->servername_done = s->session->tlsext_hostname
835 && strlen(s->session->tlsext_hostname) == len
836 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
848 *al = SSL_AD_DECODE_ERROR;
853 #ifndef OPENSSL_NO_SRP
854 else if (type == TLSEXT_TYPE_srp)
859 if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
861 memcpy(s->srp_ctx.login, &data[1], len);
862 s->srp_ctx.login[len]='\0';
867 #ifndef OPENSSL_NO_EC
868 else if (type == TLSEXT_TYPE_ec_point_formats &&
869 s->version != DTLS1_VERSION)
871 unsigned char *sdata = data;
872 int ecpointformatlist_length = *(sdata++);
874 if (ecpointformatlist_length != size - 1)
876 *al = TLS1_AD_DECODE_ERROR;
881 if(s->session->tlsext_ecpointformatlist)
883 OPENSSL_free(s->session->tlsext_ecpointformatlist);
884 s->session->tlsext_ecpointformatlist = NULL;
886 s->session->tlsext_ecpointformatlist_length = 0;
887 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
889 *al = TLS1_AD_INTERNAL_ERROR;
892 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
893 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
896 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
897 sdata = s->session->tlsext_ecpointformatlist;
898 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
899 fprintf(stderr,"%i ",*(sdata++));
900 fprintf(stderr,"\n");
903 else if (type == TLSEXT_TYPE_elliptic_curves &&
904 s->version != DTLS1_VERSION)
906 unsigned char *sdata = data;
907 int ellipticcurvelist_length = (*(sdata++) << 8);
908 ellipticcurvelist_length += (*(sdata++));
910 if (ellipticcurvelist_length != size - 2)
912 *al = TLS1_AD_DECODE_ERROR;
917 if(s->session->tlsext_ellipticcurvelist)
919 *al = TLS1_AD_DECODE_ERROR;
922 s->session->tlsext_ellipticcurvelist_length = 0;
923 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
925 *al = TLS1_AD_INTERNAL_ERROR;
928 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
929 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
932 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
933 sdata = s->session->tlsext_ellipticcurvelist;
934 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
935 fprintf(stderr,"%i ",*(sdata++));
936 fprintf(stderr,"\n");
939 #endif /* OPENSSL_NO_EC */
940 #ifdef TLSEXT_TYPE_opaque_prf_input
941 else if (type == TLSEXT_TYPE_opaque_prf_input &&
942 s->version != DTLS1_VERSION)
944 unsigned char *sdata = data;
948 *al = SSL_AD_DECODE_ERROR;
951 n2s(sdata, s->s3->client_opaque_prf_input_len);
952 if (s->s3->client_opaque_prf_input_len != size - 2)
954 *al = SSL_AD_DECODE_ERROR;
958 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
959 OPENSSL_free(s->s3->client_opaque_prf_input);
960 if (s->s3->client_opaque_prf_input_len == 0)
961 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
963 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
964 if (s->s3->client_opaque_prf_input == NULL)
966 *al = TLS1_AD_INTERNAL_ERROR;
971 else if (type == TLSEXT_TYPE_session_ticket)
973 if (s->tls_session_ticket_ext_cb &&
974 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
976 *al = TLS1_AD_INTERNAL_ERROR;
980 else if (type == TLSEXT_TYPE_renegotiate)
982 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
984 renegotiate_seen = 1;
986 else if (type == TLSEXT_TYPE_signature_algorithms)
989 if (sigalg_seen || size < 2)
991 *al = SSL_AD_DECODE_ERROR;
997 if (dsize != size || dsize & 1)
999 *al = SSL_AD_DECODE_ERROR;
1002 if (!tls1_process_sigalgs(s, data, dsize))
1004 *al = SSL_AD_DECODE_ERROR;
1008 else if (type == TLSEXT_TYPE_status_request &&
1009 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
1014 *al = SSL_AD_DECODE_ERROR;
1018 s->tlsext_status_type = *data++;
1020 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
1022 const unsigned char *sdata;
1024 /* Read in responder_id_list */
1029 *al = SSL_AD_DECODE_ERROR;
1038 *al = SSL_AD_DECODE_ERROR;
1042 dsize -= 2 + idsize;
1046 *al = SSL_AD_DECODE_ERROR;
1051 id = d2i_OCSP_RESPID(NULL,
1055 *al = SSL_AD_DECODE_ERROR;
1060 OCSP_RESPID_free(id);
1061 *al = SSL_AD_DECODE_ERROR;
1064 if (!s->tlsext_ocsp_ids
1065 && !(s->tlsext_ocsp_ids =
1066 sk_OCSP_RESPID_new_null()))
1068 OCSP_RESPID_free(id);
1069 *al = SSL_AD_INTERNAL_ERROR;
1072 if (!sk_OCSP_RESPID_push(
1073 s->tlsext_ocsp_ids, id))
1075 OCSP_RESPID_free(id);
1076 *al = SSL_AD_INTERNAL_ERROR;
1081 /* Read in request_extensions */
1084 *al = SSL_AD_DECODE_ERROR;
1091 *al = SSL_AD_DECODE_ERROR;
1097 s->tlsext_ocsp_exts =
1098 d2i_X509_EXTENSIONS(NULL,
1100 if (!s->tlsext_ocsp_exts
1101 || (data + dsize != sdata))
1103 *al = SSL_AD_DECODE_ERROR;
1108 /* We don't know what to do with any other type
1112 s->tlsext_status_type = -1;
1115 /* session ticket processed earlier */
1123 /* Need RI if renegotiating */
1125 if (!renegotiate_seen && s->renegotiate &&
1126 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1128 *al = SSL_AD_HANDSHAKE_FAILURE;
1129 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
1130 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1137 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1139 unsigned short length;
1140 unsigned short type;
1141 unsigned short size;
1142 unsigned char *data = *p;
1143 int tlsext_servername = 0;
1144 int renegotiate_seen = 0;
1146 if (data >= (d+n-2))
1150 if (data+length != d+n)
1152 *al = SSL_AD_DECODE_ERROR;
1156 while(data <= (d+n-4))
1161 if (data+size > (d+n))
1164 if (s->tlsext_debug_cb)
1165 s->tlsext_debug_cb(s, 1, type, data, size,
1166 s->tlsext_debug_arg);
1168 if (type == TLSEXT_TYPE_server_name)
1170 if (s->tlsext_hostname == NULL || size > 0)
1172 *al = TLS1_AD_UNRECOGNIZED_NAME;
1175 tlsext_servername = 1;
1178 #ifndef OPENSSL_NO_EC
1179 else if (type == TLSEXT_TYPE_ec_point_formats &&
1180 s->version != DTLS1_VERSION)
1182 unsigned char *sdata = data;
1183 int ecpointformatlist_length = *(sdata++);
1185 if (ecpointformatlist_length != size - 1)
1187 *al = TLS1_AD_DECODE_ERROR;
1190 s->session->tlsext_ecpointformatlist_length = 0;
1191 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1192 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1194 *al = TLS1_AD_INTERNAL_ERROR;
1197 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1198 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1200 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1201 sdata = s->session->tlsext_ecpointformatlist;
1202 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1203 fprintf(stderr,"%i ",*(sdata++));
1204 fprintf(stderr,"\n");
1207 #endif /* OPENSSL_NO_EC */
1209 else if (type == TLSEXT_TYPE_session_ticket)
1211 if (s->tls_session_ticket_ext_cb &&
1212 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1214 *al = TLS1_AD_INTERNAL_ERROR;
1217 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1220 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1223 s->tlsext_ticket_expected = 1;
1225 #ifdef TLSEXT_TYPE_opaque_prf_input
1226 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1227 s->version != DTLS1_VERSION)
1229 unsigned char *sdata = data;
1233 *al = SSL_AD_DECODE_ERROR;
1236 n2s(sdata, s->s3->server_opaque_prf_input_len);
1237 if (s->s3->server_opaque_prf_input_len != size - 2)
1239 *al = SSL_AD_DECODE_ERROR;
1243 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1244 OPENSSL_free(s->s3->server_opaque_prf_input);
1245 if (s->s3->server_opaque_prf_input_len == 0)
1246 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1248 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1250 if (s->s3->server_opaque_prf_input == NULL)
1252 *al = TLS1_AD_INTERNAL_ERROR;
1257 else if (type == TLSEXT_TYPE_status_request &&
1258 s->version != DTLS1_VERSION)
1260 /* MUST be empty and only sent if we've requested
1261 * a status request message.
1263 if ((s->tlsext_status_type == -1) || (size > 0))
1265 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1268 /* Set flag to expect CertificateStatus message */
1269 s->tlsext_status_expected = 1;
1271 else if (type == TLSEXT_TYPE_renegotiate)
1273 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1275 renegotiate_seen = 1;
1282 *al = SSL_AD_DECODE_ERROR;
1286 if (!s->hit && tlsext_servername == 1)
1288 if (s->tlsext_hostname)
1290 if (s->session->tlsext_hostname == NULL)
1292 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1293 if (!s->session->tlsext_hostname)
1295 *al = SSL_AD_UNRECOGNIZED_NAME;
1301 *al = SSL_AD_DECODE_ERROR;
1311 /* Determine if we need to see RI. Strictly speaking if we want to
1312 * avoid an attack we should *always* see RI even on initial server
1313 * hello because the client doesn't see any renegotiation during an
1314 * attack. However this would mean we could not connect to any server
1315 * which doesn't support RI so for the immediate future tolerate RI
1316 * absence on initial connect only.
1318 if (!renegotiate_seen
1319 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
1320 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1322 *al = SSL_AD_HANDSHAKE_FAILURE;
1323 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
1324 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1332 int ssl_prepare_clienthello_tlsext(SSL *s)
1334 #ifndef OPENSSL_NO_EC
1335 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1336 * and elliptic curves we support.
1341 unsigned long alg_k, alg_a;
1342 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1344 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1346 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1348 alg_k = c->algorithm_mkey;
1349 alg_a = c->algorithm_auth;
1350 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1356 using_ecc = using_ecc && (s->version >= TLS1_VERSION);
1359 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1360 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1362 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1365 s->tlsext_ecpointformatlist_length = 3;
1366 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1367 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1368 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1370 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1371 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1372 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1373 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1375 s->tlsext_ellipticcurvelist_length = 0;
1376 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1379 for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <=
1380 sizeof(nid_list)/sizeof(nid_list[0]); i++)
1383 #endif /* OPENSSL_NO_EC */
1385 #ifdef TLSEXT_TYPE_opaque_prf_input
1389 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1391 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1396 if (s->tlsext_opaque_prf_input != NULL)
1398 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1399 OPENSSL_free(s->s3->client_opaque_prf_input);
1401 if (s->tlsext_opaque_prf_input_len == 0)
1402 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1404 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1405 if (s->s3->client_opaque_prf_input == NULL)
1407 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1410 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1414 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1415 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1422 int ssl_prepare_serverhello_tlsext(SSL *s)
1424 #ifndef OPENSSL_NO_EC
1425 /* If we are server and using an ECC cipher suite, send the point formats we support
1426 * if the client sent us an ECPointsFormat extension. Note that the server is not
1427 * supposed to send an EllipticCurves extension.
1430 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1431 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1432 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1433 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1437 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1438 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1440 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1443 s->tlsext_ecpointformatlist_length = 3;
1444 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1445 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1446 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1448 #endif /* OPENSSL_NO_EC */
1453 int ssl_check_clienthello_tlsext(SSL *s)
1455 int ret=SSL_TLSEXT_ERR_NOACK;
1456 int al = SSL_AD_UNRECOGNIZED_NAME;
1458 #ifndef OPENSSL_NO_EC
1459 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1460 * ssl3_choose_cipher in s3_lib.c.
1462 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1463 * ssl3_choose_cipher in s3_lib.c.
1467 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1468 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1469 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1470 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1472 /* If status request then ask callback what to do.
1473 * Note: this must be called after servername callbacks in case
1474 * the certificate has changed.
1476 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1479 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1482 /* We don't want to send a status request response */
1483 case SSL_TLSEXT_ERR_NOACK:
1484 s->tlsext_status_expected = 0;
1486 /* status request response should be sent */
1487 case SSL_TLSEXT_ERR_OK:
1488 if (s->tlsext_ocsp_resp)
1489 s->tlsext_status_expected = 1;
1491 s->tlsext_status_expected = 0;
1493 /* something bad happened */
1494 case SSL_TLSEXT_ERR_ALERT_FATAL:
1495 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1496 al = SSL_AD_INTERNAL_ERROR;
1501 s->tlsext_status_expected = 0;
1503 #ifdef TLSEXT_TYPE_opaque_prf_input
1505 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1506 * but we might be sending an alert in response to the client hello,
1507 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1511 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1513 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1516 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1517 al = SSL_AD_INTERNAL_ERROR;
1522 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1523 OPENSSL_free(s->s3->server_opaque_prf_input);
1524 s->s3->server_opaque_prf_input = NULL;
1526 if (s->tlsext_opaque_prf_input != NULL)
1528 if (s->s3->client_opaque_prf_input != NULL &&
1529 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1531 /* can only use this extension if we have a server opaque PRF input
1532 * of the same length as the client opaque PRF input! */
1534 if (s->tlsext_opaque_prf_input_len == 0)
1535 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1537 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1538 if (s->s3->server_opaque_prf_input == NULL)
1540 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1541 al = SSL_AD_INTERNAL_ERROR;
1544 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1548 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1550 /* The callback wants to enforce use of the extension,
1551 * but we can't do that with the client opaque PRF input;
1552 * abort the handshake.
1554 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1555 al = SSL_AD_HANDSHAKE_FAILURE;
1563 case SSL_TLSEXT_ERR_ALERT_FATAL:
1564 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1567 case SSL_TLSEXT_ERR_ALERT_WARNING:
1568 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1571 case SSL_TLSEXT_ERR_NOACK:
1572 s->servername_done=0;
1578 int ssl_check_serverhello_tlsext(SSL *s)
1580 int ret=SSL_TLSEXT_ERR_NOACK;
1581 int al = SSL_AD_UNRECOGNIZED_NAME;
1583 #ifndef OPENSSL_NO_EC
1584 /* If we are client and using an elliptic curve cryptography cipher
1585 * suite, then if server returns an EC point formats lists extension
1586 * it must contain uncompressed.
1588 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1589 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1590 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1591 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
1592 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1594 /* we are using an ECC cipher */
1596 unsigned char *list;
1597 int found_uncompressed = 0;
1598 list = s->session->tlsext_ecpointformatlist;
1599 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1601 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1603 found_uncompressed = 1;
1607 if (!found_uncompressed)
1609 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1613 ret = SSL_TLSEXT_ERR_OK;
1614 #endif /* OPENSSL_NO_EC */
1616 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1617 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1618 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1619 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1621 #ifdef TLSEXT_TYPE_opaque_prf_input
1622 if (s->s3->server_opaque_prf_input_len > 0)
1624 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1625 * So first verify that we really have a value from the server too. */
1627 if (s->s3->server_opaque_prf_input == NULL)
1629 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1630 al = SSL_AD_HANDSHAKE_FAILURE;
1633 /* Anytime the server *has* sent an opaque PRF input, we need to check
1634 * that we have a client opaque PRF input of the same size. */
1635 if (s->s3->client_opaque_prf_input == NULL ||
1636 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1638 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1639 al = SSL_AD_ILLEGAL_PARAMETER;
1644 /* If we've requested certificate status and we wont get one
1647 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1648 && s->ctx && s->ctx->tlsext_status_cb)
1651 /* Set resp to NULL, resplen to -1 so callback knows
1652 * there is no response.
1654 if (s->tlsext_ocsp_resp)
1656 OPENSSL_free(s->tlsext_ocsp_resp);
1657 s->tlsext_ocsp_resp = NULL;
1659 s->tlsext_ocsp_resplen = -1;
1660 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1663 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1664 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1668 al = SSL_AD_INTERNAL_ERROR;
1669 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1675 case SSL_TLSEXT_ERR_ALERT_FATAL:
1676 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1679 case SSL_TLSEXT_ERR_ALERT_WARNING:
1680 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1683 case SSL_TLSEXT_ERR_NOACK:
1684 s->servername_done=0;
1690 /* Since the server cache lookup is done early on in the processing of client
1691 * hello and other operations depend on the result we need to handle any TLS
1692 * session ticket extension at the same time.
1695 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1696 const unsigned char *limit, SSL_SESSION **ret)
1698 /* Point after session ID in client hello */
1699 const unsigned char *p = session_id + len;
1702 /* If tickets disabled behave as if no ticket present
1703 * to permit stateful resumption.
1705 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1708 if ((s->version <= SSL3_VERSION) || !limit)
1712 /* Skip past DTLS cookie */
1713 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
1720 /* Skip past cipher list */
1725 /* Skip past compression algorithm list */
1730 /* Now at start of extensions */
1731 if ((p + 2) >= limit)
1734 while ((p + 4) <= limit)
1736 unsigned short type, size;
1739 if (p + size > limit)
1741 if (type == TLSEXT_TYPE_session_ticket)
1743 /* If tickets disabled indicate cache miss which will
1744 * trigger a full handshake
1746 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1748 /* If zero length note client will accept a ticket
1749 * and indicate cache miss to trigger full handshake
1753 s->tlsext_ticket_expected = 1;
1754 return 0; /* Cache miss */
1756 if (s->tls_session_secret_cb)
1758 /* Indicate cache miss here and instead of
1759 * generating the session from ticket now,
1760 * trigger abbreviated handshake based on
1761 * external mechanism to calculate the master
1765 return tls_decrypt_ticket(s, p, size, session_id, len,
1773 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1774 const unsigned char *sess_id, int sesslen,
1775 SSL_SESSION **psess)
1778 unsigned char *sdec;
1779 const unsigned char *p;
1780 int slen, mlen, renew_ticket = 0;
1781 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1784 SSL_CTX *tctx = s->initial_ctx;
1785 /* Need at least keyname + iv + some encrypted data */
1788 /* Initialize session ticket encryption and HMAC contexts */
1789 HMAC_CTX_init(&hctx);
1790 EVP_CIPHER_CTX_init(&ctx);
1791 if (tctx->tlsext_ticket_key_cb)
1793 unsigned char *nctick = (unsigned char *)etick;
1794 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
1805 /* Check key name matches */
1806 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
1808 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1809 tlsext_tick_md(), NULL);
1810 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1811 tctx->tlsext_tick_aes_key, etick + 16);
1813 /* Attempt to process session ticket, first conduct sanity and
1814 * integrity checks on ticket.
1816 mlen = HMAC_size(&hctx);
1819 EVP_CIPHER_CTX_cleanup(&ctx);
1823 /* Check HMAC of encrypted ticket */
1824 HMAC_Update(&hctx, etick, eticklen);
1825 HMAC_Final(&hctx, tick_hmac, NULL);
1826 HMAC_CTX_cleanup(&hctx);
1827 if (memcmp(tick_hmac, etick + eticklen, mlen))
1829 /* Attempt to decrypt session data */
1830 /* Move p after IV to start of encrypted ticket, update length */
1831 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1832 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1833 sdec = OPENSSL_malloc(eticklen);
1836 EVP_CIPHER_CTX_cleanup(&ctx);
1839 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1840 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1843 EVP_CIPHER_CTX_cleanup(&ctx);
1846 sess = d2i_SSL_SESSION(NULL, &p, slen);
1850 /* The session ID if non-empty is used by some clients to
1851 * detect that the ticket has been accepted. So we copy it to
1852 * the session structure. If it is empty set length to zero
1853 * as required by standard.
1856 memcpy(sess->session_id, sess_id, sesslen);
1857 sess->session_id_length = sesslen;
1859 s->tlsext_ticket_expected = renew_ticket;
1862 /* If session decrypt failure indicate a cache miss and set state to
1866 s->tlsext_ticket_expected = 1;
1870 /* Tables to translate from NIDs to TLS v1.2 ids */
1878 static tls12_lookup tls12_md[] = {
1879 #ifndef OPENSSL_NO_MD5
1880 {NID_md5, TLSEXT_hash_md5},
1882 #ifndef OPENSSL_NO_SHA
1883 {NID_sha1, TLSEXT_hash_sha1},
1885 #ifndef OPENSSL_NO_SHA256
1886 {NID_sha224, TLSEXT_hash_sha224},
1887 {NID_sha256, TLSEXT_hash_sha256},
1889 #ifndef OPENSSL_NO_SHA512
1890 {NID_sha384, TLSEXT_hash_sha384},
1891 {NID_sha512, TLSEXT_hash_sha512}
1895 static tls12_lookup tls12_sig[] = {
1896 #ifndef OPENSSL_NO_RSA
1897 {EVP_PKEY_RSA, TLSEXT_signature_rsa},
1899 #ifndef OPENSSL_NO_RSA
1900 {EVP_PKEY_DSA, TLSEXT_signature_dsa},
1902 #ifndef OPENSSL_NO_ECDSA
1903 {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
1907 static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
1910 for (i = 0; i < tlen; i++)
1912 if (table[i].nid == nid)
1918 static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen)
1921 for (i = 0; i < tlen; i++)
1923 if (table[i].id == id)
1924 return table[i].nid;
1930 int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
1933 md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
1934 sizeof(tls12_md)/sizeof(tls12_lookup));
1937 sig_id = tls12_get_sigid(pk);
1940 p[0] = (unsigned char)md_id;
1941 p[1] = (unsigned char)sig_id;
1945 int tls12_get_sigid(const EVP_PKEY *pk)
1947 return tls12_find_id(pk->type, tls12_sig,
1948 sizeof(tls12_sig)/sizeof(tls12_lookup));
1951 const EVP_MD *tls12_get_hash(unsigned char hash_alg)
1955 #ifndef OPENSSL_NO_MD5
1956 case TLSEXT_hash_md5:
1959 #ifndef OPENSSL_NO_SHA
1960 case TLSEXT_hash_sha1:
1963 #ifndef OPENSSL_NO_SHA256
1964 case TLSEXT_hash_sha224:
1965 return EVP_sha224();
1967 case TLSEXT_hash_sha256:
1968 return EVP_sha256();
1970 #ifndef OPENSSL_NO_SHA512
1971 case TLSEXT_hash_sha384:
1972 return EVP_sha384();
1974 case TLSEXT_hash_sha512:
1975 return EVP_sha512();
1983 /* Set preferred digest for each key type */
1985 int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
1990 /* Extension ignored for TLS versions below 1.2 */
1991 if (TLS1_get_version(s) < TLS1_2_VERSION)
1993 /* Should never happen */
1997 c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL;
1998 c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL;
1999 c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
2000 c->pkeys[SSL_PKEY_ECC].digest = NULL;
2002 for (i = 0; i < dsize; i += 2)
2004 unsigned char hash_alg = data[i], sig_alg = data[i+1];
2008 #ifndef OPENSSL_NO_RSA
2009 case TLSEXT_signature_rsa:
2010 idx = SSL_PKEY_RSA_SIGN;
2013 #ifndef OPENSSL_NO_DSA
2014 case TLSEXT_signature_dsa:
2015 idx = SSL_PKEY_DSA_SIGN;
2018 #ifndef OPENSSL_NO_ECDSA
2019 case TLSEXT_signature_ecdsa:
2027 if (c->pkeys[idx].digest == NULL)
2029 md = tls12_get_hash(hash_alg);
2032 c->pkeys[idx].digest = md;
2033 if (idx == SSL_PKEY_RSA_SIGN)
2034 c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
2041 /* Set any remaining keys to default values. NOTE: if alg is not
2042 * supported it stays as NULL.
2044 #ifndef OPENSSL_NO_DSA
2045 if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
2046 c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_dss1();
2048 #ifndef OPENSSL_NO_RSA
2049 if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
2051 c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
2052 c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
2055 #ifndef OPENSSL_NO_ECDSA
2056 if (!c->pkeys[SSL_PKEY_ECC].digest)
2057 c->pkeys[SSL_PKEY_ECC].digest = EVP_ecdsa();