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);
125 static int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize);
128 SSL3_ENC_METHOD TLSv1_enc_data={
131 tls1_setup_key_block,
132 tls1_generate_master_secret,
133 tls1_change_cipher_state,
134 tls1_final_finish_mac,
135 TLS1_FINISH_MAC_LENGTH,
136 tls1_cert_verify_mac,
137 TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
138 TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
142 long tls1_default_timeout(void)
144 /* 2 hours, the 24 hours mentioned in the TLSv1 spec
145 * is way too long for http, the cache would over fill */
151 if (!ssl3_new(s)) return(0);
152 s->method->ssl_clear(s);
156 void tls1_free(SSL *s)
158 #ifndef OPENSSL_NO_TLSEXT
159 if (s->tlsext_session_ticket)
161 OPENSSL_free(s->tlsext_session_ticket);
163 #endif /* OPENSSL_NO_TLSEXT */
167 void tls1_clear(SSL *s)
170 s->version = s->method->version;
173 #ifndef OPENSSL_NO_EC
174 static int nid_list[] =
176 NID_sect163k1, /* sect163k1 (1) */
177 NID_sect163r1, /* sect163r1 (2) */
178 NID_sect163r2, /* sect163r2 (3) */
179 NID_sect193r1, /* sect193r1 (4) */
180 NID_sect193r2, /* sect193r2 (5) */
181 NID_sect233k1, /* sect233k1 (6) */
182 NID_sect233r1, /* sect233r1 (7) */
183 NID_sect239k1, /* sect239k1 (8) */
184 NID_sect283k1, /* sect283k1 (9) */
185 NID_sect283r1, /* sect283r1 (10) */
186 NID_sect409k1, /* sect409k1 (11) */
187 NID_sect409r1, /* sect409r1 (12) */
188 NID_sect571k1, /* sect571k1 (13) */
189 NID_sect571r1, /* sect571r1 (14) */
190 NID_secp160k1, /* secp160k1 (15) */
191 NID_secp160r1, /* secp160r1 (16) */
192 NID_secp160r2, /* secp160r2 (17) */
193 NID_secp192k1, /* secp192k1 (18) */
194 NID_X9_62_prime192v1, /* secp192r1 (19) */
195 NID_secp224k1, /* secp224k1 (20) */
196 NID_secp224r1, /* secp224r1 (21) */
197 NID_secp256k1, /* secp256k1 (22) */
198 NID_X9_62_prime256v1, /* secp256r1 (23) */
199 NID_secp384r1, /* secp384r1 (24) */
200 NID_secp521r1 /* secp521r1 (25) */
203 int tls1_ec_curve_id2nid(int curve_id)
205 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
206 if ((curve_id < 1) || ((unsigned int)curve_id >
207 sizeof(nid_list)/sizeof(nid_list[0])))
209 return nid_list[curve_id-1];
212 int tls1_ec_nid2curve_id(int nid)
214 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
217 case NID_sect163k1: /* sect163k1 (1) */
219 case NID_sect163r1: /* sect163r1 (2) */
221 case NID_sect163r2: /* sect163r2 (3) */
223 case NID_sect193r1: /* sect193r1 (4) */
225 case NID_sect193r2: /* sect193r2 (5) */
227 case NID_sect233k1: /* sect233k1 (6) */
229 case NID_sect233r1: /* sect233r1 (7) */
231 case NID_sect239k1: /* sect239k1 (8) */
233 case NID_sect283k1: /* sect283k1 (9) */
235 case NID_sect283r1: /* sect283r1 (10) */
237 case NID_sect409k1: /* sect409k1 (11) */
239 case NID_sect409r1: /* sect409r1 (12) */
241 case NID_sect571k1: /* sect571k1 (13) */
243 case NID_sect571r1: /* sect571r1 (14) */
245 case NID_secp160k1: /* secp160k1 (15) */
247 case NID_secp160r1: /* secp160r1 (16) */
249 case NID_secp160r2: /* secp160r2 (17) */
251 case NID_secp192k1: /* secp192k1 (18) */
253 case NID_X9_62_prime192v1: /* secp192r1 (19) */
255 case NID_secp224k1: /* secp224k1 (20) */
257 case NID_secp224r1: /* secp224r1 (21) */
259 case NID_secp256k1: /* secp256k1 (22) */
261 case NID_X9_62_prime256v1: /* secp256r1 (23) */
263 case NID_secp384r1: /* secp384r1 (24) */
265 case NID_secp521r1: /* secp521r1 (25) */
271 #endif /* OPENSSL_NO_EC */
273 #ifndef OPENSSL_NO_TLSEXT
274 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
277 unsigned char *ret = p;
279 /* don't add extensions for SSLv3 unless doing secure renegotiation */
280 if (s->client_version == SSL3_VERSION
281 && !s->s3->send_connection_binding)
286 if (ret>=limit) return NULL; /* this really never occurs, but ... */
288 if (s->tlsext_hostname != NULL)
290 /* Add TLS extension servername to the Client Hello message */
291 unsigned long size_str;
294 /* check for enough space.
295 4 for the servername type and entension length
296 2 for servernamelist length
297 1 for the hostname type
298 2 for hostname length
302 if ((lenmax = limit - ret - 9) < 0
303 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
306 /* extension type and length */
307 s2n(TLSEXT_TYPE_server_name,ret);
310 /* length of servername list */
313 /* hostname type, length and hostname */
314 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
316 memcpy(ret, s->tlsext_hostname, size_str);
320 /* Add RI if renegotiating */
325 if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
327 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
331 if((limit - p - 4 - el) < 0) return NULL;
333 s2n(TLSEXT_TYPE_renegotiate,ret);
336 if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
338 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
345 #ifndef OPENSSL_NO_SRP
346 #define MIN(x,y) (((x)<(y))?(x):(y))
347 /* we add SRP username the first time only if we have one! */
348 if (s->srp_ctx.login != NULL)
349 {/* Add TLS extension SRP username to the Client Hello message */
350 int login_len = MIN(strlen(s->srp_ctx.login) + 1, 255);
353 if ((lenmax = limit - ret - 5) < 0) return NULL;
354 if (login_len > lenmax) return NULL;
357 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
360 s2n(TLSEXT_TYPE_srp,ret);
361 s2n(login_len+1,ret);
363 (*ret++) = (unsigned char) MIN(strlen(s->srp_ctx.login), 254);
364 memcpy(ret, s->srp_ctx.login, MIN(strlen(s->srp_ctx.login), 254));
369 #ifndef OPENSSL_NO_EC
370 if (s->tlsext_ecpointformatlist != NULL &&
371 s->version != DTLS1_VERSION)
373 /* Add TLS extension ECPointFormats to the ClientHello message */
376 if ((lenmax = limit - ret - 5) < 0) return NULL;
377 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
378 if (s->tlsext_ecpointformatlist_length > 255)
380 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
384 s2n(TLSEXT_TYPE_ec_point_formats,ret);
385 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
386 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
387 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
388 ret+=s->tlsext_ecpointformatlist_length;
390 if (s->tlsext_ellipticcurvelist != NULL &&
391 s->version != DTLS1_VERSION)
393 /* Add TLS extension EllipticCurves to the ClientHello message */
396 if ((lenmax = limit - ret - 6) < 0) return NULL;
397 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
398 if (s->tlsext_ellipticcurvelist_length > 65532)
400 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
404 s2n(TLSEXT_TYPE_elliptic_curves,ret);
405 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
407 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
408 * elliptic_curve_list, but the examples use two bytes.
409 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
410 * resolves this to two bytes.
412 s2n(s->tlsext_ellipticcurvelist_length, ret);
413 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
414 ret+=s->tlsext_ellipticcurvelist_length;
416 #endif /* OPENSSL_NO_EC */
418 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
421 if (!s->new_session && s->session && s->session->tlsext_tick)
422 ticklen = s->session->tlsext_ticklen;
423 else if (s->session && s->tlsext_session_ticket &&
424 s->tlsext_session_ticket->data)
426 ticklen = s->tlsext_session_ticket->length;
427 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
428 if (!s->session->tlsext_tick)
430 memcpy(s->session->tlsext_tick,
431 s->tlsext_session_ticket->data,
433 s->session->tlsext_ticklen = ticklen;
437 if (ticklen == 0 && s->tlsext_session_ticket &&
438 s->tlsext_session_ticket->data == NULL)
440 /* Check for enough room 2 for extension type, 2 for len
443 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
444 s2n(TLSEXT_TYPE_session_ticket,ret);
448 memcpy(ret, s->session->tlsext_tick, ticklen);
454 if (s->version >= TLS1_2_VERSION)
456 /* List of supported signature algorithms and hashes.
457 * Should make this customisable at some point, for
458 * now include everything we support.
460 static unsigned char sigalgs[] = {
461 #ifndef OPENSSL_NO_RSA
462 # ifndef OPENSSL_NO_SHA512
463 TLSEXT_hash_sha512, TLSEXT_signature_rsa,
464 TLSEXT_hash_sha384, TLSEXT_signature_rsa,
466 # ifndef OPENSSL_NO_SHA256
467 TLSEXT_hash_sha256, TLSEXT_signature_rsa,
468 TLSEXT_hash_sha224, TLSEXT_signature_rsa,
470 # ifndef OPENSSL_NO_SHA
471 TLSEXT_hash_sha1, TLSEXT_signature_rsa,
474 #ifndef OPENSSL_NO_ECDSA
475 # ifndef OPENSSL_NO_SHA512
476 TLSEXT_hash_sha512, TLSEXT_signature_ecdsa,
477 TLSEXT_hash_sha384, TLSEXT_signature_ecdsa,
479 # ifndef OPENSSL_NO_SHA256
480 TLSEXT_hash_sha256, TLSEXT_signature_ecdsa,
481 TLSEXT_hash_sha224, TLSEXT_signature_ecdsa,
483 # ifndef OPENSSL_NO_SHA
484 TLSEXT_hash_sha1, TLSEXT_signature_ecdsa,
487 #ifndef OPENSSL_NO_DSA
488 # ifndef OPENSSL_NO_SHA512
489 TLSEXT_hash_sha512, TLSEXT_signature_dsa,
490 TLSEXT_hash_sha384, TLSEXT_signature_dsa,
492 # ifndef OPENSSL_NO_SHA256
493 TLSEXT_hash_sha256, TLSEXT_signature_dsa,
494 TLSEXT_hash_sha224, TLSEXT_signature_dsa,
496 # ifndef OPENSSL_NO_SHA
497 TLSEXT_hash_sha1, TLSEXT_signature_dsa
501 if ((size_t)(limit - ret) < sizeof(sigalgs) + 6)
503 s2n(TLSEXT_TYPE_signature_algorithms,ret);
504 s2n(sizeof(sigalgs) + 2, ret);
505 s2n(sizeof(sigalgs), ret);
506 memcpy(ret, sigalgs, sizeof(sigalgs));
507 ret += sizeof(sigalgs);
510 #ifdef TLSEXT_TYPE_opaque_prf_input
511 if (s->s3->client_opaque_prf_input != NULL &&
512 s->version != DTLS1_VERSION)
514 size_t col = s->s3->client_opaque_prf_input_len;
516 if ((long)(limit - ret - 6 - col < 0))
518 if (col > 0xFFFD) /* can't happen */
521 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
524 memcpy(ret, s->s3->client_opaque_prf_input, col);
529 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
530 s->version != DTLS1_VERSION)
533 long extlen, idlen, itmp;
537 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
539 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
540 itmp = i2d_OCSP_RESPID(id, NULL);
546 if (s->tlsext_ocsp_exts)
548 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
555 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
556 s2n(TLSEXT_TYPE_status_request, ret);
557 if (extlen + idlen > 0xFFF0)
559 s2n(extlen + idlen + 5, ret);
560 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
562 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
564 /* save position of id len */
565 unsigned char *q = ret;
566 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
567 /* skip over id len */
569 itmp = i2d_OCSP_RESPID(id, &ret);
575 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
578 if ((extdatalen = ret-p-2)== 0)
585 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
588 unsigned char *ret = p;
590 /* don't add extensions for SSLv3, unless doing secure renegotiation */
591 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
595 if (ret>=limit) return NULL; /* this really never occurs, but ... */
597 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
599 if ((long)(limit - ret - 4) < 0) return NULL;
601 s2n(TLSEXT_TYPE_server_name,ret);
605 if(s->s3->send_connection_binding)
609 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
611 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
615 if((limit - p - 4 - el) < 0) return NULL;
617 s2n(TLSEXT_TYPE_renegotiate,ret);
620 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
622 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
629 #ifndef OPENSSL_NO_EC
630 if (s->tlsext_ecpointformatlist != NULL &&
631 s->version != DTLS1_VERSION)
633 /* Add TLS extension ECPointFormats to the ServerHello message */
636 if ((lenmax = limit - ret - 5) < 0) return NULL;
637 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
638 if (s->tlsext_ecpointformatlist_length > 255)
640 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
644 s2n(TLSEXT_TYPE_ec_point_formats,ret);
645 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
646 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
647 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
648 ret+=s->tlsext_ecpointformatlist_length;
651 /* Currently the server should not respond with a SupportedCurves extension */
652 #endif /* OPENSSL_NO_EC */
654 if (s->tlsext_ticket_expected
655 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
657 if ((long)(limit - ret - 4) < 0) return NULL;
658 s2n(TLSEXT_TYPE_session_ticket,ret);
662 if (s->tlsext_status_expected)
664 if ((long)(limit - ret - 4) < 0) return NULL;
665 s2n(TLSEXT_TYPE_status_request,ret);
669 #ifdef TLSEXT_TYPE_opaque_prf_input
670 if (s->s3->server_opaque_prf_input != NULL &&
671 s->version != DTLS1_VERSION)
673 size_t sol = s->s3->server_opaque_prf_input_len;
675 if ((long)(limit - ret - 6 - sol) < 0)
677 if (sol > 0xFFFD) /* can't happen */
680 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
683 memcpy(ret, s->s3->server_opaque_prf_input, sol);
687 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
688 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
689 { const unsigned char cryptopro_ext[36] = {
690 0xfd, 0xe8, /*65000*/
691 0x00, 0x20, /*32 bytes length*/
692 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
693 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
694 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
695 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
696 if (limit-ret<36) return NULL;
697 memcpy(ret,cryptopro_ext,36);
702 if ((extdatalen = ret-p-2)== 0)
709 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
714 unsigned char *data = *p;
715 int renegotiate_seen = 0;
718 s->servername_done = 0;
719 s->tlsext_status_type = -1;
725 if (data > (d+n-len))
728 while (data <= (d+n-4))
733 if (data+size > (d+n))
736 fprintf(stderr,"Received extension type %d size %d\n",type,size);
738 if (s->tlsext_debug_cb)
739 s->tlsext_debug_cb(s, 0, type, data, size,
740 s->tlsext_debug_arg);
741 /* The servername extension is treated as follows:
743 - Only the hostname type is supported with a maximum length of 255.
744 - The servername is rejected if too long or if it contains zeros,
745 in which case an fatal alert is generated.
746 - The servername field is maintained together with the session cache.
747 - When a session is resumed, the servername call back invoked in order
748 to allow the application to position itself to the right context.
749 - The servername is acknowledged if it is new for a session or when
750 it is identical to a previously used for the same session.
751 Applications can control the behaviour. They can at any time
752 set a 'desirable' servername for a new SSL object. This can be the
753 case for example with HTTPS when a Host: header field is received and
754 a renegotiation is requested. In this case, a possible servername
755 presented in the new client hello is only acknowledged if it matches
756 the value of the Host: field.
757 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
758 if they provide for changing an explicit servername context for the session,
759 i.e. when the session has been established with a servername extension.
760 - On session reconnect, the servername extension may be absent.
764 if (type == TLSEXT_TYPE_server_name)
766 unsigned char *sdata;
772 *al = SSL_AD_DECODE_ERROR;
779 *al = SSL_AD_DECODE_ERROR;
786 servname_type = *(sdata++);
792 *al = SSL_AD_DECODE_ERROR;
795 if (s->servername_done == 0)
796 switch (servname_type)
798 case TLSEXT_NAMETYPE_host_name:
801 if(s->session->tlsext_hostname)
803 *al = SSL_AD_DECODE_ERROR;
806 if (len > TLSEXT_MAXLEN_host_name)
808 *al = TLS1_AD_UNRECOGNIZED_NAME;
811 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
813 *al = TLS1_AD_INTERNAL_ERROR;
816 memcpy(s->session->tlsext_hostname, sdata, len);
817 s->session->tlsext_hostname[len]='\0';
818 if (strlen(s->session->tlsext_hostname) != len) {
819 OPENSSL_free(s->session->tlsext_hostname);
820 s->session->tlsext_hostname = NULL;
821 *al = TLS1_AD_UNRECOGNIZED_NAME;
824 s->servername_done = 1;
828 s->servername_done = s->session->tlsext_hostname
829 && strlen(s->session->tlsext_hostname) == len
830 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
842 *al = SSL_AD_DECODE_ERROR;
847 #ifndef OPENSSL_NO_SRP
848 else if (type == TLSEXT_TYPE_srp)
853 if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
855 memcpy(s->srp_ctx.login, &data[1], len);
856 s->srp_ctx.login[len]='\0';
861 #ifndef OPENSSL_NO_EC
862 else if (type == TLSEXT_TYPE_ec_point_formats &&
863 s->version != DTLS1_VERSION)
865 unsigned char *sdata = data;
866 int ecpointformatlist_length = *(sdata++);
868 if (ecpointformatlist_length != size - 1)
870 *al = TLS1_AD_DECODE_ERROR;
875 if(s->session->tlsext_ecpointformatlist)
877 OPENSSL_free(s->session->tlsext_ecpointformatlist);
878 s->session->tlsext_ecpointformatlist = NULL;
880 s->session->tlsext_ecpointformatlist_length = 0;
881 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
883 *al = TLS1_AD_INTERNAL_ERROR;
886 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
887 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
890 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
891 sdata = s->session->tlsext_ecpointformatlist;
892 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
893 fprintf(stderr,"%i ",*(sdata++));
894 fprintf(stderr,"\n");
897 else if (type == TLSEXT_TYPE_elliptic_curves &&
898 s->version != DTLS1_VERSION)
900 unsigned char *sdata = data;
901 int ellipticcurvelist_length = (*(sdata++) << 8);
902 ellipticcurvelist_length += (*(sdata++));
904 if (ellipticcurvelist_length != size - 2)
906 *al = TLS1_AD_DECODE_ERROR;
911 if(s->session->tlsext_ellipticcurvelist)
913 *al = TLS1_AD_DECODE_ERROR;
916 s->session->tlsext_ellipticcurvelist_length = 0;
917 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
919 *al = TLS1_AD_INTERNAL_ERROR;
922 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
923 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
926 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
927 sdata = s->session->tlsext_ellipticcurvelist;
928 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
929 fprintf(stderr,"%i ",*(sdata++));
930 fprintf(stderr,"\n");
933 #endif /* OPENSSL_NO_EC */
934 #ifdef TLSEXT_TYPE_opaque_prf_input
935 else if (type == TLSEXT_TYPE_opaque_prf_input &&
936 s->version != DTLS1_VERSION)
938 unsigned char *sdata = data;
942 *al = SSL_AD_DECODE_ERROR;
945 n2s(sdata, s->s3->client_opaque_prf_input_len);
946 if (s->s3->client_opaque_prf_input_len != size - 2)
948 *al = SSL_AD_DECODE_ERROR;
952 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
953 OPENSSL_free(s->s3->client_opaque_prf_input);
954 if (s->s3->client_opaque_prf_input_len == 0)
955 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
957 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
958 if (s->s3->client_opaque_prf_input == NULL)
960 *al = TLS1_AD_INTERNAL_ERROR;
965 else if (type == TLSEXT_TYPE_session_ticket)
967 if (s->tls_session_ticket_ext_cb &&
968 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
970 *al = TLS1_AD_INTERNAL_ERROR;
974 else if (type == TLSEXT_TYPE_renegotiate)
976 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
978 renegotiate_seen = 1;
980 else if (type == TLSEXT_TYPE_signature_algorithms)
983 if (sigalg_seen || size < 2)
985 *al = SSL_AD_DECODE_ERROR;
991 if (dsize != size || dsize & 1)
993 *al = SSL_AD_DECODE_ERROR;
996 if (!tls1_process_sigalgs(s, data, dsize))
998 *al = SSL_AD_DECODE_ERROR;
1002 else if (type == TLSEXT_TYPE_status_request &&
1003 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
1008 *al = SSL_AD_DECODE_ERROR;
1012 s->tlsext_status_type = *data++;
1014 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
1016 const unsigned char *sdata;
1018 /* Read in responder_id_list */
1023 *al = SSL_AD_DECODE_ERROR;
1032 *al = SSL_AD_DECODE_ERROR;
1036 dsize -= 2 + idsize;
1040 *al = SSL_AD_DECODE_ERROR;
1045 id = d2i_OCSP_RESPID(NULL,
1049 *al = SSL_AD_DECODE_ERROR;
1054 OCSP_RESPID_free(id);
1055 *al = SSL_AD_DECODE_ERROR;
1058 if (!s->tlsext_ocsp_ids
1059 && !(s->tlsext_ocsp_ids =
1060 sk_OCSP_RESPID_new_null()))
1062 OCSP_RESPID_free(id);
1063 *al = SSL_AD_INTERNAL_ERROR;
1066 if (!sk_OCSP_RESPID_push(
1067 s->tlsext_ocsp_ids, id))
1069 OCSP_RESPID_free(id);
1070 *al = SSL_AD_INTERNAL_ERROR;
1075 /* Read in request_extensions */
1078 *al = SSL_AD_DECODE_ERROR;
1085 *al = SSL_AD_DECODE_ERROR;
1091 s->tlsext_ocsp_exts =
1092 d2i_X509_EXTENSIONS(NULL,
1094 if (!s->tlsext_ocsp_exts
1095 || (data + dsize != sdata))
1097 *al = SSL_AD_DECODE_ERROR;
1102 /* We don't know what to do with any other type
1106 s->tlsext_status_type = -1;
1109 /* session ticket processed earlier */
1117 /* Need RI if renegotiating */
1119 if (!renegotiate_seen && s->renegotiate &&
1120 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1122 *al = SSL_AD_HANDSHAKE_FAILURE;
1123 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
1124 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1131 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1133 unsigned short length;
1134 unsigned short type;
1135 unsigned short size;
1136 unsigned char *data = *p;
1137 int tlsext_servername = 0;
1138 int renegotiate_seen = 0;
1140 if (data >= (d+n-2))
1144 if (data+length != d+n)
1146 *al = SSL_AD_DECODE_ERROR;
1150 while(data <= (d+n-4))
1155 if (data+size > (d+n))
1158 if (s->tlsext_debug_cb)
1159 s->tlsext_debug_cb(s, 1, type, data, size,
1160 s->tlsext_debug_arg);
1162 if (type == TLSEXT_TYPE_server_name)
1164 if (s->tlsext_hostname == NULL || size > 0)
1166 *al = TLS1_AD_UNRECOGNIZED_NAME;
1169 tlsext_servername = 1;
1172 #ifndef OPENSSL_NO_EC
1173 else if (type == TLSEXT_TYPE_ec_point_formats &&
1174 s->version != DTLS1_VERSION)
1176 unsigned char *sdata = data;
1177 int ecpointformatlist_length = *(sdata++);
1179 if (ecpointformatlist_length != size - 1)
1181 *al = TLS1_AD_DECODE_ERROR;
1184 s->session->tlsext_ecpointformatlist_length = 0;
1185 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1186 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1188 *al = TLS1_AD_INTERNAL_ERROR;
1191 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1192 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1194 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1195 sdata = s->session->tlsext_ecpointformatlist;
1196 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1197 fprintf(stderr,"%i ",*(sdata++));
1198 fprintf(stderr,"\n");
1201 #endif /* OPENSSL_NO_EC */
1203 else if (type == TLSEXT_TYPE_session_ticket)
1205 if (s->tls_session_ticket_ext_cb &&
1206 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1208 *al = TLS1_AD_INTERNAL_ERROR;
1211 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1214 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1217 s->tlsext_ticket_expected = 1;
1219 #ifdef TLSEXT_TYPE_opaque_prf_input
1220 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1221 s->version != DTLS1_VERSION)
1223 unsigned char *sdata = data;
1227 *al = SSL_AD_DECODE_ERROR;
1230 n2s(sdata, s->s3->server_opaque_prf_input_len);
1231 if (s->s3->server_opaque_prf_input_len != size - 2)
1233 *al = SSL_AD_DECODE_ERROR;
1237 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1238 OPENSSL_free(s->s3->server_opaque_prf_input);
1239 if (s->s3->server_opaque_prf_input_len == 0)
1240 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1242 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1244 if (s->s3->server_opaque_prf_input == NULL)
1246 *al = TLS1_AD_INTERNAL_ERROR;
1251 else if (type == TLSEXT_TYPE_status_request &&
1252 s->version != DTLS1_VERSION)
1254 /* MUST be empty and only sent if we've requested
1255 * a status request message.
1257 if ((s->tlsext_status_type == -1) || (size > 0))
1259 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1262 /* Set flag to expect CertificateStatus message */
1263 s->tlsext_status_expected = 1;
1265 else if (type == TLSEXT_TYPE_renegotiate)
1267 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1269 renegotiate_seen = 1;
1276 *al = SSL_AD_DECODE_ERROR;
1280 if (!s->hit && tlsext_servername == 1)
1282 if (s->tlsext_hostname)
1284 if (s->session->tlsext_hostname == NULL)
1286 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1287 if (!s->session->tlsext_hostname)
1289 *al = SSL_AD_UNRECOGNIZED_NAME;
1295 *al = SSL_AD_DECODE_ERROR;
1305 /* Determine if we need to see RI. Strictly speaking if we want to
1306 * avoid an attack we should *always* see RI even on initial server
1307 * hello because the client doesn't see any renegotiation during an
1308 * attack. However this would mean we could not connect to any server
1309 * which doesn't support RI so for the immediate future tolerate RI
1310 * absence on initial connect only.
1312 if (!renegotiate_seen
1313 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
1314 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1316 *al = SSL_AD_HANDSHAKE_FAILURE;
1317 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
1318 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1326 int ssl_prepare_clienthello_tlsext(SSL *s)
1328 #ifndef OPENSSL_NO_EC
1329 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1330 * and elliptic curves we support.
1335 unsigned long alg_k, alg_a;
1336 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1338 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1340 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1342 alg_k = c->algorithm_mkey;
1343 alg_a = c->algorithm_auth;
1344 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1350 using_ecc = using_ecc && (s->version >= TLS1_VERSION);
1353 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1354 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1356 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1359 s->tlsext_ecpointformatlist_length = 3;
1360 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1361 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1362 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1364 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1365 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1366 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1367 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1369 s->tlsext_ellipticcurvelist_length = 0;
1370 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1373 for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <=
1374 sizeof(nid_list)/sizeof(nid_list[0]); i++)
1377 #endif /* OPENSSL_NO_EC */
1379 #ifdef TLSEXT_TYPE_opaque_prf_input
1383 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1385 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1390 if (s->tlsext_opaque_prf_input != NULL)
1392 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1393 OPENSSL_free(s->s3->client_opaque_prf_input);
1395 if (s->tlsext_opaque_prf_input_len == 0)
1396 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1398 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1399 if (s->s3->client_opaque_prf_input == NULL)
1401 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1404 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1408 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1409 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1416 int ssl_prepare_serverhello_tlsext(SSL *s)
1418 #ifndef OPENSSL_NO_EC
1419 /* If we are server and using an ECC cipher suite, send the point formats we support
1420 * if the client sent us an ECPointsFormat extension. Note that the server is not
1421 * supposed to send an EllipticCurves extension.
1424 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1425 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1426 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1427 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1431 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1432 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1434 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1437 s->tlsext_ecpointformatlist_length = 3;
1438 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1439 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1440 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1442 #endif /* OPENSSL_NO_EC */
1447 int ssl_check_clienthello_tlsext(SSL *s)
1449 int ret=SSL_TLSEXT_ERR_NOACK;
1450 int al = SSL_AD_UNRECOGNIZED_NAME;
1452 #ifndef OPENSSL_NO_EC
1453 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1454 * ssl3_choose_cipher in s3_lib.c.
1456 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1457 * ssl3_choose_cipher in s3_lib.c.
1461 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1462 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1463 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1464 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1466 /* If status request then ask callback what to do.
1467 * Note: this must be called after servername callbacks in case
1468 * the certificate has changed.
1470 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1473 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1476 /* We don't want to send a status request response */
1477 case SSL_TLSEXT_ERR_NOACK:
1478 s->tlsext_status_expected = 0;
1480 /* status request response should be sent */
1481 case SSL_TLSEXT_ERR_OK:
1482 if (s->tlsext_ocsp_resp)
1483 s->tlsext_status_expected = 1;
1485 s->tlsext_status_expected = 0;
1487 /* something bad happened */
1488 case SSL_TLSEXT_ERR_ALERT_FATAL:
1489 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1490 al = SSL_AD_INTERNAL_ERROR;
1495 s->tlsext_status_expected = 0;
1497 #ifdef TLSEXT_TYPE_opaque_prf_input
1499 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1500 * but we might be sending an alert in response to the client hello,
1501 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1505 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1507 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1510 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1511 al = SSL_AD_INTERNAL_ERROR;
1516 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1517 OPENSSL_free(s->s3->server_opaque_prf_input);
1518 s->s3->server_opaque_prf_input = NULL;
1520 if (s->tlsext_opaque_prf_input != NULL)
1522 if (s->s3->client_opaque_prf_input != NULL &&
1523 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1525 /* can only use this extension if we have a server opaque PRF input
1526 * of the same length as the client opaque PRF input! */
1528 if (s->tlsext_opaque_prf_input_len == 0)
1529 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1531 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1532 if (s->s3->server_opaque_prf_input == NULL)
1534 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1535 al = SSL_AD_INTERNAL_ERROR;
1538 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1542 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1544 /* The callback wants to enforce use of the extension,
1545 * but we can't do that with the client opaque PRF input;
1546 * abort the handshake.
1548 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1549 al = SSL_AD_HANDSHAKE_FAILURE;
1557 case SSL_TLSEXT_ERR_ALERT_FATAL:
1558 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1561 case SSL_TLSEXT_ERR_ALERT_WARNING:
1562 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1565 case SSL_TLSEXT_ERR_NOACK:
1566 s->servername_done=0;
1572 int ssl_check_serverhello_tlsext(SSL *s)
1574 int ret=SSL_TLSEXT_ERR_NOACK;
1575 int al = SSL_AD_UNRECOGNIZED_NAME;
1577 #ifndef OPENSSL_NO_EC
1578 /* If we are client and using an elliptic curve cryptography cipher
1579 * suite, then if server returns an EC point formats lists extension
1580 * it must contain uncompressed.
1582 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1583 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1584 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1585 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
1586 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1588 /* we are using an ECC cipher */
1590 unsigned char *list;
1591 int found_uncompressed = 0;
1592 list = s->session->tlsext_ecpointformatlist;
1593 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1595 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1597 found_uncompressed = 1;
1601 if (!found_uncompressed)
1603 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1607 ret = SSL_TLSEXT_ERR_OK;
1608 #endif /* OPENSSL_NO_EC */
1610 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1611 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1612 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1613 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1615 #ifdef TLSEXT_TYPE_opaque_prf_input
1616 if (s->s3->server_opaque_prf_input_len > 0)
1618 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1619 * So first verify that we really have a value from the server too. */
1621 if (s->s3->server_opaque_prf_input == NULL)
1623 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1624 al = SSL_AD_HANDSHAKE_FAILURE;
1627 /* Anytime the server *has* sent an opaque PRF input, we need to check
1628 * that we have a client opaque PRF input of the same size. */
1629 if (s->s3->client_opaque_prf_input == NULL ||
1630 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1632 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1633 al = SSL_AD_ILLEGAL_PARAMETER;
1638 /* If we've requested certificate status and we wont get one
1641 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1642 && s->ctx && s->ctx->tlsext_status_cb)
1645 /* Set resp to NULL, resplen to -1 so callback knows
1646 * there is no response.
1648 if (s->tlsext_ocsp_resp)
1650 OPENSSL_free(s->tlsext_ocsp_resp);
1651 s->tlsext_ocsp_resp = NULL;
1653 s->tlsext_ocsp_resplen = -1;
1654 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1657 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1658 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1662 al = SSL_AD_INTERNAL_ERROR;
1663 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1669 case SSL_TLSEXT_ERR_ALERT_FATAL:
1670 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1673 case SSL_TLSEXT_ERR_ALERT_WARNING:
1674 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1677 case SSL_TLSEXT_ERR_NOACK:
1678 s->servername_done=0;
1684 /* Since the server cache lookup is done early on in the processing of client
1685 * hello and other operations depend on the result we need to handle any TLS
1686 * session ticket extension at the same time.
1689 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1690 const unsigned char *limit, SSL_SESSION **ret)
1692 /* Point after session ID in client hello */
1693 const unsigned char *p = session_id + len;
1696 /* If tickets disabled behave as if no ticket present
1697 * to permit stateful resumption.
1699 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1702 if ((s->version <= SSL3_VERSION) || !limit)
1706 /* Skip past DTLS cookie */
1707 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
1714 /* Skip past cipher list */
1719 /* Skip past compression algorithm list */
1724 /* Now at start of extensions */
1725 if ((p + 2) >= limit)
1728 while ((p + 4) <= limit)
1730 unsigned short type, size;
1733 if (p + size > limit)
1735 if (type == TLSEXT_TYPE_session_ticket)
1737 /* If tickets disabled indicate cache miss which will
1738 * trigger a full handshake
1740 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1742 /* If zero length note client will accept a ticket
1743 * and indicate cache miss to trigger full handshake
1747 s->tlsext_ticket_expected = 1;
1748 return 0; /* Cache miss */
1750 if (s->tls_session_secret_cb)
1752 /* Indicate cache miss here and instead of
1753 * generating the session from ticket now,
1754 * trigger abbreviated handshake based on
1755 * external mechanism to calculate the master
1759 return tls_decrypt_ticket(s, p, size, session_id, len,
1767 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1768 const unsigned char *sess_id, int sesslen,
1769 SSL_SESSION **psess)
1772 unsigned char *sdec;
1773 const unsigned char *p;
1774 int slen, mlen, renew_ticket = 0;
1775 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1778 SSL_CTX *tctx = s->initial_ctx;
1779 /* Need at least keyname + iv + some encrypted data */
1782 /* Initialize session ticket encryption and HMAC contexts */
1783 HMAC_CTX_init(&hctx);
1784 EVP_CIPHER_CTX_init(&ctx);
1785 if (tctx->tlsext_ticket_key_cb)
1787 unsigned char *nctick = (unsigned char *)etick;
1788 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
1799 /* Check key name matches */
1800 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
1802 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1803 tlsext_tick_md(), NULL);
1804 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1805 tctx->tlsext_tick_aes_key, etick + 16);
1807 /* Attempt to process session ticket, first conduct sanity and
1808 * integrity checks on ticket.
1810 mlen = HMAC_size(&hctx);
1813 EVP_CIPHER_CTX_cleanup(&ctx);
1817 /* Check HMAC of encrypted ticket */
1818 HMAC_Update(&hctx, etick, eticklen);
1819 HMAC_Final(&hctx, tick_hmac, NULL);
1820 HMAC_CTX_cleanup(&hctx);
1821 if (memcmp(tick_hmac, etick + eticklen, mlen))
1823 /* Attempt to decrypt session data */
1824 /* Move p after IV to start of encrypted ticket, update length */
1825 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1826 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1827 sdec = OPENSSL_malloc(eticklen);
1830 EVP_CIPHER_CTX_cleanup(&ctx);
1833 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1834 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1837 EVP_CIPHER_CTX_cleanup(&ctx);
1840 sess = d2i_SSL_SESSION(NULL, &p, slen);
1844 /* The session ID if non-empty is used by some clients to
1845 * detect that the ticket has been accepted. So we copy it to
1846 * the session structure. If it is empty set length to zero
1847 * as required by standard.
1850 memcpy(sess->session_id, sess_id, sesslen);
1851 sess->session_id_length = sesslen;
1853 s->tlsext_ticket_expected = renew_ticket;
1856 /* If session decrypt failure indicate a cache miss and set state to
1860 s->tlsext_ticket_expected = 1;
1864 /* Tables to translate from NIDs to TLS v1.2 ids */
1872 static tls12_lookup tls12_md[] = {
1873 #ifndef OPENSSL_NO_MD5
1874 {NID_md5, TLSEXT_hash_md5},
1876 #ifndef OPENSSL_NO_SHA
1877 {NID_sha1, TLSEXT_hash_sha1},
1879 #ifndef OPENSSL_NO_SHA256
1880 {NID_sha224, TLSEXT_hash_sha224},
1881 {NID_sha256, TLSEXT_hash_sha256},
1883 #ifndef OPENSSL_NO_SHA512
1884 {NID_sha384, TLSEXT_hash_sha384},
1885 {NID_sha512, TLSEXT_hash_sha512}
1889 static tls12_lookup tls12_sig[] = {
1890 #ifndef OPENSSL_NO_RSA
1891 {EVP_PKEY_RSA, TLSEXT_signature_rsa},
1893 #ifndef OPENSSL_NO_RSA
1894 {EVP_PKEY_DSA, TLSEXT_signature_dsa},
1896 #ifndef OPENSSL_NO_ECDSA
1897 {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
1901 static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
1904 for (i = 0; i < tlen; i++)
1906 if (table[i].nid == nid)
1912 static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen)
1915 for (i = 0; i < tlen; i++)
1917 if (table[i].id == id)
1918 return table[i].nid;
1924 int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
1927 md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
1928 sizeof(tls12_md)/sizeof(tls12_lookup));
1931 sig_id = tls12_get_sigid(pk);
1934 p[0] = (unsigned char)md_id;
1935 p[1] = (unsigned char)sig_id;
1939 int tls12_get_sigid(const EVP_PKEY *pk)
1941 return tls12_find_id(pk->type, tls12_sig,
1942 sizeof(tls12_sig)/sizeof(tls12_lookup));
1945 const EVP_MD *tls12_get_hash(unsigned char hash_alg)
1949 #ifndef OPENSSL_NO_MD5
1950 case TLSEXT_hash_md5:
1953 #ifndef OPENSSL_NO_SHA
1954 case TLSEXT_hash_sha1:
1957 #ifndef OPENSSL_NO_SHA256
1958 case TLSEXT_hash_sha224:
1959 return EVP_sha224();
1961 case TLSEXT_hash_sha256:
1962 return EVP_sha256();
1964 #ifndef OPENSSL_NO_SHA512
1965 case TLSEXT_hash_sha384:
1966 return EVP_sha384();
1968 case TLSEXT_hash_sha512:
1969 return EVP_sha512();
1977 /* Set preferred digest for each key type */
1979 static int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
1984 /* Extension ignored for TLS versions below 1.2 */
1985 if (s->version < TLS1_2_VERSION)
1988 c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL;
1989 c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL;
1990 c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
1991 c->pkeys[SSL_PKEY_ECC].digest = NULL;
1993 for (i = 0; i < dsize; i += 2)
1995 unsigned char hash_alg = data[i], sig_alg = data[i+1];
1999 #ifndef OPENSSL_NO_RSA
2000 case TLSEXT_signature_rsa:
2001 idx = SSL_PKEY_RSA_SIGN;
2004 #ifndef OPENSSL_NO_DSA
2005 case TLSEXT_signature_dsa:
2006 idx = SSL_PKEY_DSA_SIGN;
2009 #ifndef OPENSSL_NO_ECDSA
2010 case TLSEXT_signature_ecdsa:
2018 if (c->pkeys[idx].digest == NULL)
2020 md = tls12_get_hash(hash_alg);
2023 c->pkeys[idx].digest = md;
2024 if (idx == SSL_PKEY_RSA_SIGN)
2025 c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
2031 /* Set any remaining keys to default values. NOTE: if alg is not
2032 * supported it stays as NULL.
2034 #ifndef OPENSSL_NO_DSA
2035 if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
2036 c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_dss1();
2038 #ifndef OPENSSL_NO_RSA
2039 if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
2041 c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
2042 c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
2045 #ifndef OPENSSL_NO_ECDSA
2046 if (!c->pkeys[SSL_PKEY_ECC].digest)
2047 c->pkeys[SSL_PKEY_ECC].digest = EVP_ecdsa();