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
273 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
276 unsigned char *ret = p;
278 /* don't add extensions for SSLv3 unless doing secure renegotiation */
279 if (s->client_version == SSL3_VERSION
280 && !s->s3->send_connection_binding)
285 if (ret>=limit) return NULL; /* this really never occurs, but ... */
287 if (s->tlsext_hostname != NULL)
289 /* Add TLS extension servername to the Client Hello message */
290 unsigned long size_str;
293 /* check for enough space.
294 4 for the servername type and entension length
295 2 for servernamelist length
296 1 for the hostname type
297 2 for hostname length
301 if ((lenmax = limit - ret - 9) < 0
302 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
305 /* extension type and length */
306 s2n(TLSEXT_TYPE_server_name,ret);
309 /* length of servername list */
312 /* hostname type, length and hostname */
313 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
315 memcpy(ret, s->tlsext_hostname, size_str);
319 /* Add RI if renegotiating */
324 if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
326 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
330 if((limit - p - 4 - el) < 0) return NULL;
332 s2n(TLSEXT_TYPE_renegotiate,ret);
335 if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
337 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
344 #ifndef OPENSSL_NO_EC
345 if (s->tlsext_ecpointformatlist != NULL &&
346 s->version != DTLS1_VERSION)
348 /* Add TLS extension ECPointFormats to the ClientHello message */
351 if ((lenmax = limit - ret - 5) < 0) return NULL;
352 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
353 if (s->tlsext_ecpointformatlist_length > 255)
355 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
359 s2n(TLSEXT_TYPE_ec_point_formats,ret);
360 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
361 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
362 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
363 ret+=s->tlsext_ecpointformatlist_length;
365 if (s->tlsext_ellipticcurvelist != NULL &&
366 s->version != DTLS1_VERSION)
368 /* Add TLS extension EllipticCurves to the ClientHello message */
371 if ((lenmax = limit - ret - 6) < 0) return NULL;
372 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
373 if (s->tlsext_ellipticcurvelist_length > 65532)
375 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
379 s2n(TLSEXT_TYPE_elliptic_curves,ret);
380 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
382 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
383 * elliptic_curve_list, but the examples use two bytes.
384 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
385 * resolves this to two bytes.
387 s2n(s->tlsext_ellipticcurvelist_length, ret);
388 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
389 ret+=s->tlsext_ellipticcurvelist_length;
391 #endif /* OPENSSL_NO_EC */
393 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
396 if (!s->new_session && s->session && s->session->tlsext_tick)
397 ticklen = s->session->tlsext_ticklen;
398 else if (s->session && s->tlsext_session_ticket &&
399 s->tlsext_session_ticket->data)
401 ticklen = s->tlsext_session_ticket->length;
402 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
403 if (!s->session->tlsext_tick)
405 memcpy(s->session->tlsext_tick,
406 s->tlsext_session_ticket->data,
408 s->session->tlsext_ticklen = ticklen;
412 if (ticklen == 0 && s->tlsext_session_ticket &&
413 s->tlsext_session_ticket->data == NULL)
415 /* Check for enough room 2 for extension type, 2 for len
418 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
419 s2n(TLSEXT_TYPE_session_ticket,ret);
423 memcpy(ret, s->session->tlsext_tick, ticklen);
429 #ifdef TLSEXT_TYPE_opaque_prf_input
430 if (s->s3->client_opaque_prf_input != NULL &&
431 s->version != DTLS1_VERSION)
433 size_t col = s->s3->client_opaque_prf_input_len;
435 if ((long)(limit - ret - 6 - col < 0))
437 if (col > 0xFFFD) /* can't happen */
440 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
443 memcpy(ret, s->s3->client_opaque_prf_input, col);
448 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
449 s->version != DTLS1_VERSION)
452 long extlen, idlen, itmp;
456 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
458 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
459 itmp = i2d_OCSP_RESPID(id, NULL);
465 if (s->tlsext_ocsp_exts)
467 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
474 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
475 s2n(TLSEXT_TYPE_status_request, ret);
476 if (extlen + idlen > 0xFFF0)
478 s2n(extlen + idlen + 5, ret);
479 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
481 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
483 /* save position of id len */
484 unsigned char *q = ret;
485 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
486 /* skip over id len */
488 itmp = i2d_OCSP_RESPID(id, &ret);
494 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
497 if ((extdatalen = ret-p-2)== 0)
504 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
507 unsigned char *ret = p;
509 /* don't add extensions for SSLv3, unless doing secure renegotiation */
510 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
514 if (ret>=limit) return NULL; /* this really never occurs, but ... */
516 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
518 if ((long)(limit - ret - 4) < 0) return NULL;
520 s2n(TLSEXT_TYPE_server_name,ret);
524 if(s->s3->send_connection_binding)
528 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
530 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
534 if((limit - p - 4 - el) < 0) return NULL;
536 s2n(TLSEXT_TYPE_renegotiate,ret);
539 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
541 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
548 #ifndef OPENSSL_NO_EC
549 if (s->tlsext_ecpointformatlist != NULL &&
550 s->version != DTLS1_VERSION)
552 /* Add TLS extension ECPointFormats to the ServerHello message */
555 if ((lenmax = limit - ret - 5) < 0) return NULL;
556 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
557 if (s->tlsext_ecpointformatlist_length > 255)
559 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
563 s2n(TLSEXT_TYPE_ec_point_formats,ret);
564 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
565 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
566 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
567 ret+=s->tlsext_ecpointformatlist_length;
570 /* Currently the server should not respond with a SupportedCurves extension */
571 #endif /* OPENSSL_NO_EC */
573 if (s->tlsext_ticket_expected
574 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
576 if ((long)(limit - ret - 4) < 0) return NULL;
577 s2n(TLSEXT_TYPE_session_ticket,ret);
581 if (s->tlsext_status_expected)
583 if ((long)(limit - ret - 4) < 0) return NULL;
584 s2n(TLSEXT_TYPE_status_request,ret);
588 #ifdef TLSEXT_TYPE_opaque_prf_input
589 if (s->s3->server_opaque_prf_input != NULL &&
590 s->version != DTLS1_VERSION)
592 size_t sol = s->s3->server_opaque_prf_input_len;
594 if ((long)(limit - ret - 6 - sol) < 0)
596 if (sol > 0xFFFD) /* can't happen */
599 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
602 memcpy(ret, s->s3->server_opaque_prf_input, sol);
606 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
607 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
608 { const unsigned char cryptopro_ext[36] = {
609 0xfd, 0xe8, /*65000*/
610 0x00, 0x20, /*32 bytes length*/
611 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
612 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
613 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
614 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
615 if (limit-ret<36) return NULL;
616 memcpy(ret,cryptopro_ext,36);
621 if ((extdatalen = ret-p-2)== 0)
628 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
633 unsigned char *data = *p;
634 int renegotiate_seen = 0;
636 s->servername_done = 0;
637 s->tlsext_status_type = -1;
643 if (data > (d+n-len))
646 while (data <= (d+n-4))
651 if (data+size > (d+n))
654 fprintf(stderr,"Received extension type %d size %d\n",type,size);
656 if (s->tlsext_debug_cb)
657 s->tlsext_debug_cb(s, 0, type, data, size,
658 s->tlsext_debug_arg);
659 /* The servername extension is treated as follows:
661 - Only the hostname type is supported with a maximum length of 255.
662 - The servername is rejected if too long or if it contains zeros,
663 in which case an fatal alert is generated.
664 - The servername field is maintained together with the session cache.
665 - When a session is resumed, the servername call back invoked in order
666 to allow the application to position itself to the right context.
667 - The servername is acknowledged if it is new for a session or when
668 it is identical to a previously used for the same session.
669 Applications can control the behaviour. They can at any time
670 set a 'desirable' servername for a new SSL object. This can be the
671 case for example with HTTPS when a Host: header field is received and
672 a renegotiation is requested. In this case, a possible servername
673 presented in the new client hello is only acknowledged if it matches
674 the value of the Host: field.
675 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
676 if they provide for changing an explicit servername context for the session,
677 i.e. when the session has been established with a servername extension.
678 - On session reconnect, the servername extension may be absent.
682 if (type == TLSEXT_TYPE_server_name)
684 unsigned char *sdata;
690 *al = SSL_AD_DECODE_ERROR;
697 *al = SSL_AD_DECODE_ERROR;
704 servname_type = *(sdata++);
710 *al = SSL_AD_DECODE_ERROR;
713 if (s->servername_done == 0)
714 switch (servname_type)
716 case TLSEXT_NAMETYPE_host_name:
719 if(s->session->tlsext_hostname)
721 *al = SSL_AD_DECODE_ERROR;
724 if (len > TLSEXT_MAXLEN_host_name)
726 *al = TLS1_AD_UNRECOGNIZED_NAME;
729 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
731 *al = TLS1_AD_INTERNAL_ERROR;
734 memcpy(s->session->tlsext_hostname, sdata, len);
735 s->session->tlsext_hostname[len]='\0';
736 if (strlen(s->session->tlsext_hostname) != len) {
737 OPENSSL_free(s->session->tlsext_hostname);
738 s->session->tlsext_hostname = NULL;
739 *al = TLS1_AD_UNRECOGNIZED_NAME;
742 s->servername_done = 1;
746 s->servername_done = s->session->tlsext_hostname
747 && strlen(s->session->tlsext_hostname) == len
748 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
760 *al = SSL_AD_DECODE_ERROR;
766 #ifndef OPENSSL_NO_EC
767 else if (type == TLSEXT_TYPE_ec_point_formats &&
768 s->version != DTLS1_VERSION)
770 unsigned char *sdata = data;
771 int ecpointformatlist_length = *(sdata++);
773 if (ecpointformatlist_length != size - 1)
775 *al = TLS1_AD_DECODE_ERROR;
780 if(s->session->tlsext_ecpointformatlist)
782 OPENSSL_free(s->session->tlsext_ecpointformatlist);
783 s->session->tlsext_ecpointformatlist = NULL;
785 s->session->tlsext_ecpointformatlist_length = 0;
786 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
788 *al = TLS1_AD_INTERNAL_ERROR;
791 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
792 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
795 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
796 sdata = s->session->tlsext_ecpointformatlist;
797 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
798 fprintf(stderr,"%i ",*(sdata++));
799 fprintf(stderr,"\n");
802 else if (type == TLSEXT_TYPE_elliptic_curves &&
803 s->version != DTLS1_VERSION)
805 unsigned char *sdata = data;
806 int ellipticcurvelist_length = (*(sdata++) << 8);
807 ellipticcurvelist_length += (*(sdata++));
809 if (ellipticcurvelist_length != size - 2)
811 *al = TLS1_AD_DECODE_ERROR;
816 if(s->session->tlsext_ellipticcurvelist)
818 *al = TLS1_AD_DECODE_ERROR;
821 s->session->tlsext_ellipticcurvelist_length = 0;
822 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
824 *al = TLS1_AD_INTERNAL_ERROR;
827 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
828 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
831 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
832 sdata = s->session->tlsext_ellipticcurvelist;
833 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
834 fprintf(stderr,"%i ",*(sdata++));
835 fprintf(stderr,"\n");
838 #endif /* OPENSSL_NO_EC */
839 #ifdef TLSEXT_TYPE_opaque_prf_input
840 else if (type == TLSEXT_TYPE_opaque_prf_input &&
841 s->version != DTLS1_VERSION)
843 unsigned char *sdata = data;
847 *al = SSL_AD_DECODE_ERROR;
850 n2s(sdata, s->s3->client_opaque_prf_input_len);
851 if (s->s3->client_opaque_prf_input_len != size - 2)
853 *al = SSL_AD_DECODE_ERROR;
857 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
858 OPENSSL_free(s->s3->client_opaque_prf_input);
859 if (s->s3->client_opaque_prf_input_len == 0)
860 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
862 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
863 if (s->s3->client_opaque_prf_input == NULL)
865 *al = TLS1_AD_INTERNAL_ERROR;
870 else if (type == TLSEXT_TYPE_session_ticket)
872 if (s->tls_session_ticket_ext_cb &&
873 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
875 *al = TLS1_AD_INTERNAL_ERROR;
879 else if (type == TLSEXT_TYPE_renegotiate)
881 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
883 renegotiate_seen = 1;
885 else if (type == TLSEXT_TYPE_status_request &&
886 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
891 *al = SSL_AD_DECODE_ERROR;
895 s->tlsext_status_type = *data++;
897 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
899 const unsigned char *sdata;
901 /* Read in responder_id_list */
906 *al = SSL_AD_DECODE_ERROR;
915 *al = SSL_AD_DECODE_ERROR;
922 *al = SSL_AD_DECODE_ERROR;
927 id = d2i_OCSP_RESPID(NULL,
931 *al = SSL_AD_DECODE_ERROR;
936 OCSP_RESPID_free(id);
937 *al = SSL_AD_DECODE_ERROR;
940 if (!s->tlsext_ocsp_ids
941 && !(s->tlsext_ocsp_ids =
942 sk_OCSP_RESPID_new_null()))
944 OCSP_RESPID_free(id);
945 *al = SSL_AD_INTERNAL_ERROR;
948 if (!sk_OCSP_RESPID_push(
949 s->tlsext_ocsp_ids, id))
951 OCSP_RESPID_free(id);
952 *al = SSL_AD_INTERNAL_ERROR;
957 /* Read in request_extensions */
962 *al = SSL_AD_DECODE_ERROR;
968 s->tlsext_ocsp_exts =
969 d2i_X509_EXTENSIONS(NULL,
971 if (!s->tlsext_ocsp_exts
972 || (data + dsize != sdata))
974 *al = SSL_AD_DECODE_ERROR;
979 /* We don't know what to do with any other type
983 s->tlsext_status_type = -1;
986 /* session ticket processed earlier */
994 /* Need RI if renegotiating */
996 if (!renegotiate_seen && s->renegotiate &&
997 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
999 *al = SSL_AD_HANDSHAKE_FAILURE;
1000 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
1001 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1008 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1010 unsigned short length;
1011 unsigned short type;
1012 unsigned short size;
1013 unsigned char *data = *p;
1014 int tlsext_servername = 0;
1015 int renegotiate_seen = 0;
1017 if (data >= (d+n-2))
1021 if (data+length != d+n)
1023 *al = SSL_AD_DECODE_ERROR;
1027 while(data <= (d+n-4))
1032 if (data+size > (d+n))
1035 if (s->tlsext_debug_cb)
1036 s->tlsext_debug_cb(s, 1, type, data, size,
1037 s->tlsext_debug_arg);
1039 if (type == TLSEXT_TYPE_server_name)
1041 if (s->tlsext_hostname == NULL || size > 0)
1043 *al = TLS1_AD_UNRECOGNIZED_NAME;
1046 tlsext_servername = 1;
1049 #ifndef OPENSSL_NO_EC
1050 else if (type == TLSEXT_TYPE_ec_point_formats &&
1051 s->version != DTLS1_VERSION)
1053 unsigned char *sdata = data;
1054 int ecpointformatlist_length = *(sdata++);
1056 if (ecpointformatlist_length != size - 1)
1058 *al = TLS1_AD_DECODE_ERROR;
1061 s->session->tlsext_ecpointformatlist_length = 0;
1062 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1063 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1065 *al = TLS1_AD_INTERNAL_ERROR;
1068 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1069 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1071 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1072 sdata = s->session->tlsext_ecpointformatlist;
1073 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1074 fprintf(stderr,"%i ",*(sdata++));
1075 fprintf(stderr,"\n");
1078 #endif /* OPENSSL_NO_EC */
1080 else if (type == TLSEXT_TYPE_session_ticket)
1082 if (s->tls_session_ticket_ext_cb &&
1083 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1085 *al = TLS1_AD_INTERNAL_ERROR;
1088 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1091 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1094 s->tlsext_ticket_expected = 1;
1096 #ifdef TLSEXT_TYPE_opaque_prf_input
1097 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1098 s->version != DTLS1_VERSION)
1100 unsigned char *sdata = data;
1104 *al = SSL_AD_DECODE_ERROR;
1107 n2s(sdata, s->s3->server_opaque_prf_input_len);
1108 if (s->s3->server_opaque_prf_input_len != size - 2)
1110 *al = SSL_AD_DECODE_ERROR;
1114 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1115 OPENSSL_free(s->s3->server_opaque_prf_input);
1116 if (s->s3->server_opaque_prf_input_len == 0)
1117 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1119 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1121 if (s->s3->server_opaque_prf_input == NULL)
1123 *al = TLS1_AD_INTERNAL_ERROR;
1128 else if (type == TLSEXT_TYPE_status_request &&
1129 s->version != DTLS1_VERSION)
1131 /* MUST be empty and only sent if we've requested
1132 * a status request message.
1134 if ((s->tlsext_status_type == -1) || (size > 0))
1136 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1139 /* Set flag to expect CertificateStatus message */
1140 s->tlsext_status_expected = 1;
1142 else if (type == TLSEXT_TYPE_renegotiate)
1144 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1146 renegotiate_seen = 1;
1153 *al = SSL_AD_DECODE_ERROR;
1157 if (!s->hit && tlsext_servername == 1)
1159 if (s->tlsext_hostname)
1161 if (s->session->tlsext_hostname == NULL)
1163 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1164 if (!s->session->tlsext_hostname)
1166 *al = SSL_AD_UNRECOGNIZED_NAME;
1172 *al = SSL_AD_DECODE_ERROR;
1182 /* Determine if we need to see RI. Strictly speaking if we want to
1183 * avoid an attack we should *always* see RI even on initial server
1184 * hello because the client doesn't see any renegotiation during an
1185 * attack. However this would mean we could not connect to any server
1186 * which doesn't support RI so for the immediate future tolerate RI
1187 * absence on initial connect only.
1189 if (!renegotiate_seen
1190 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
1191 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1193 *al = SSL_AD_HANDSHAKE_FAILURE;
1194 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
1195 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1203 int ssl_prepare_clienthello_tlsext(SSL *s)
1205 #ifndef OPENSSL_NO_EC
1206 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1207 * and elliptic curves we support.
1212 unsigned long alg_k, alg_a;
1213 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1215 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1217 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1219 alg_k = c->algorithm_mkey;
1220 alg_a = c->algorithm_auth;
1221 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1227 using_ecc = using_ecc && (s->version >= TLS1_VERSION);
1230 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1231 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1233 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1236 s->tlsext_ecpointformatlist_length = 3;
1237 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1238 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1239 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1241 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1242 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1243 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1244 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1246 s->tlsext_ellipticcurvelist_length = 0;
1247 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1250 for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <=
1251 sizeof(nid_list)/sizeof(nid_list[0]); i++)
1254 #endif /* OPENSSL_NO_EC */
1256 #ifdef TLSEXT_TYPE_opaque_prf_input
1260 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1262 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1267 if (s->tlsext_opaque_prf_input != NULL)
1269 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1270 OPENSSL_free(s->s3->client_opaque_prf_input);
1272 if (s->tlsext_opaque_prf_input_len == 0)
1273 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1275 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1276 if (s->s3->client_opaque_prf_input == NULL)
1278 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1281 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1285 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1286 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1293 int ssl_prepare_serverhello_tlsext(SSL *s)
1295 #ifndef OPENSSL_NO_EC
1296 /* If we are server and using an ECC cipher suite, send the point formats we support
1297 * if the client sent us an ECPointsFormat extension. Note that the server is not
1298 * supposed to send an EllipticCurves extension.
1301 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1302 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1303 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1304 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1308 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1309 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1311 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1314 s->tlsext_ecpointformatlist_length = 3;
1315 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1316 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1317 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1319 #endif /* OPENSSL_NO_EC */
1324 int ssl_check_clienthello_tlsext(SSL *s)
1326 int ret=SSL_TLSEXT_ERR_NOACK;
1327 int al = SSL_AD_UNRECOGNIZED_NAME;
1329 #ifndef OPENSSL_NO_EC
1330 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1331 * ssl3_choose_cipher in s3_lib.c.
1333 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1334 * ssl3_choose_cipher in s3_lib.c.
1338 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1339 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1340 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1341 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1343 /* If status request then ask callback what to do.
1344 * Note: this must be called after servername callbacks in case
1345 * the certificate has changed.
1347 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1350 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1353 /* We don't want to send a status request response */
1354 case SSL_TLSEXT_ERR_NOACK:
1355 s->tlsext_status_expected = 0;
1357 /* status request response should be sent */
1358 case SSL_TLSEXT_ERR_OK:
1359 if (s->tlsext_ocsp_resp)
1360 s->tlsext_status_expected = 1;
1362 s->tlsext_status_expected = 0;
1364 /* something bad happened */
1365 case SSL_TLSEXT_ERR_ALERT_FATAL:
1366 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1367 al = SSL_AD_INTERNAL_ERROR;
1372 s->tlsext_status_expected = 0;
1374 #ifdef TLSEXT_TYPE_opaque_prf_input
1376 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1377 * but we might be sending an alert in response to the client hello,
1378 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1382 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1384 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1387 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1388 al = SSL_AD_INTERNAL_ERROR;
1393 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1394 OPENSSL_free(s->s3->server_opaque_prf_input);
1395 s->s3->server_opaque_prf_input = NULL;
1397 if (s->tlsext_opaque_prf_input != NULL)
1399 if (s->s3->client_opaque_prf_input != NULL &&
1400 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1402 /* can only use this extension if we have a server opaque PRF input
1403 * of the same length as the client opaque PRF input! */
1405 if (s->tlsext_opaque_prf_input_len == 0)
1406 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1408 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1409 if (s->s3->server_opaque_prf_input == NULL)
1411 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1412 al = SSL_AD_INTERNAL_ERROR;
1415 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1419 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1421 /* The callback wants to enforce use of the extension,
1422 * but we can't do that with the client opaque PRF input;
1423 * abort the handshake.
1425 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1426 al = SSL_AD_HANDSHAKE_FAILURE;
1434 case SSL_TLSEXT_ERR_ALERT_FATAL:
1435 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1438 case SSL_TLSEXT_ERR_ALERT_WARNING:
1439 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1442 case SSL_TLSEXT_ERR_NOACK:
1443 s->servername_done=0;
1449 int ssl_check_serverhello_tlsext(SSL *s)
1451 int ret=SSL_TLSEXT_ERR_NOACK;
1452 int al = SSL_AD_UNRECOGNIZED_NAME;
1454 #ifndef OPENSSL_NO_EC
1455 /* If we are client and using an elliptic curve cryptography cipher
1456 * suite, then if server returns an EC point formats lists extension
1457 * it must contain uncompressed.
1459 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1460 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1461 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1462 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
1463 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1465 /* we are using an ECC cipher */
1467 unsigned char *list;
1468 int found_uncompressed = 0;
1469 list = s->session->tlsext_ecpointformatlist;
1470 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1472 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1474 found_uncompressed = 1;
1478 if (!found_uncompressed)
1480 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1484 ret = SSL_TLSEXT_ERR_OK;
1485 #endif /* OPENSSL_NO_EC */
1487 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1488 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1489 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1490 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1492 #ifdef TLSEXT_TYPE_opaque_prf_input
1493 if (s->s3->server_opaque_prf_input_len > 0)
1495 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1496 * So first verify that we really have a value from the server too. */
1498 if (s->s3->server_opaque_prf_input == NULL)
1500 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1501 al = SSL_AD_HANDSHAKE_FAILURE;
1504 /* Anytime the server *has* sent an opaque PRF input, we need to check
1505 * that we have a client opaque PRF input of the same size. */
1506 if (s->s3->client_opaque_prf_input == NULL ||
1507 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1509 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1510 al = SSL_AD_ILLEGAL_PARAMETER;
1515 /* If we've requested certificate status and we wont get one
1518 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1519 && s->ctx && s->ctx->tlsext_status_cb)
1522 /* Set resp to NULL, resplen to -1 so callback knows
1523 * there is no response.
1525 if (s->tlsext_ocsp_resp)
1527 OPENSSL_free(s->tlsext_ocsp_resp);
1528 s->tlsext_ocsp_resp = NULL;
1530 s->tlsext_ocsp_resplen = -1;
1531 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1534 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1535 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1539 al = SSL_AD_INTERNAL_ERROR;
1540 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1546 case SSL_TLSEXT_ERR_ALERT_FATAL:
1547 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1550 case SSL_TLSEXT_ERR_ALERT_WARNING:
1551 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1554 case SSL_TLSEXT_ERR_NOACK:
1555 s->servername_done=0;
1561 /* Since the server cache lookup is done early on in the processing of client
1562 * hello and other operations depend on the result we need to handle any TLS
1563 * session ticket extension at the same time.
1566 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1567 const unsigned char *limit, SSL_SESSION **ret)
1569 /* Point after session ID in client hello */
1570 const unsigned char *p = session_id + len;
1573 /* If tickets disabled behave as if no ticket present
1574 * to permit stateful resumption.
1576 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1579 if ((s->version <= SSL3_VERSION) || !limit)
1583 /* Skip past DTLS cookie */
1584 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
1591 /* Skip past cipher list */
1596 /* Skip past compression algorithm list */
1601 /* Now at start of extensions */
1602 if ((p + 2) >= limit)
1605 while ((p + 4) <= limit)
1607 unsigned short type, size;
1610 if (p + size > limit)
1612 if (type == TLSEXT_TYPE_session_ticket)
1614 /* If tickets disabled indicate cache miss which will
1615 * trigger a full handshake
1617 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1619 /* If zero length note client will accept a ticket
1620 * and indicate cache miss to trigger full handshake
1624 s->tlsext_ticket_expected = 1;
1625 return 0; /* Cache miss */
1627 if (s->tls_session_secret_cb)
1629 /* Indicate cache miss here and instead of
1630 * generating the session from ticket now,
1631 * trigger abbreviated handshake based on
1632 * external mechanism to calculate the master
1636 return tls_decrypt_ticket(s, p, size, session_id, len,
1644 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1645 const unsigned char *sess_id, int sesslen,
1646 SSL_SESSION **psess)
1649 unsigned char *sdec;
1650 const unsigned char *p;
1651 int slen, mlen, renew_ticket = 0;
1652 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1655 SSL_CTX *tctx = s->initial_ctx;
1656 /* Need at least keyname + iv + some encrypted data */
1659 /* Initialize session ticket encryption and HMAC contexts */
1660 HMAC_CTX_init(&hctx);
1661 EVP_CIPHER_CTX_init(&ctx);
1662 if (tctx->tlsext_ticket_key_cb)
1664 unsigned char *nctick = (unsigned char *)etick;
1665 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
1676 /* Check key name matches */
1677 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
1679 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1680 tlsext_tick_md(), NULL);
1681 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1682 tctx->tlsext_tick_aes_key, etick + 16);
1684 /* Attempt to process session ticket, first conduct sanity and
1685 * integrity checks on ticket.
1687 mlen = HMAC_size(&hctx);
1690 EVP_CIPHER_CTX_cleanup(&ctx);
1694 /* Check HMAC of encrypted ticket */
1695 HMAC_Update(&hctx, etick, eticklen);
1696 HMAC_Final(&hctx, tick_hmac, NULL);
1697 HMAC_CTX_cleanup(&hctx);
1698 if (memcmp(tick_hmac, etick + eticklen, mlen))
1700 /* Attempt to decrypt session data */
1701 /* Move p after IV to start of encrypted ticket, update length */
1702 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1703 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1704 sdec = OPENSSL_malloc(eticklen);
1707 EVP_CIPHER_CTX_cleanup(&ctx);
1710 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1711 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1714 EVP_CIPHER_CTX_cleanup(&ctx);
1717 sess = d2i_SSL_SESSION(NULL, &p, slen);
1721 /* The session ID if non-empty is used by some clients to
1722 * detect that the ticket has been accepted. So we copy it to
1723 * the session structure. If it is empty set length to zero
1724 * as required by standard.
1727 memcpy(sess->session_id, sess_id, sesslen);
1728 sess->session_id_length = sesslen;
1730 s->tlsext_ticket_expected = renew_ticket;
1733 /* If session decrypt failure indicate a cache miss and set state to
1737 s->tlsext_ticket_expected = 1;