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 the renegotiation option: TODOEKR switch */
323 if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
325 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
329 if((limit - p - 4 - el) < 0) return NULL;
331 s2n(TLSEXT_TYPE_renegotiate,ret);
334 if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
336 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
343 #ifndef OPENSSL_NO_EC
344 if (s->tlsext_ecpointformatlist != NULL &&
345 s->version != DTLS1_VERSION)
347 /* Add TLS extension ECPointFormats to the ClientHello message */
350 if ((lenmax = limit - ret - 5) < 0) return NULL;
351 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
352 if (s->tlsext_ecpointformatlist_length > 255)
354 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
358 s2n(TLSEXT_TYPE_ec_point_formats,ret);
359 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
360 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
361 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
362 ret+=s->tlsext_ecpointformatlist_length;
364 if (s->tlsext_ellipticcurvelist != NULL &&
365 s->version != DTLS1_VERSION)
367 /* Add TLS extension EllipticCurves to the ClientHello message */
370 if ((lenmax = limit - ret - 6) < 0) return NULL;
371 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
372 if (s->tlsext_ellipticcurvelist_length > 65532)
374 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
378 s2n(TLSEXT_TYPE_elliptic_curves,ret);
379 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
381 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
382 * elliptic_curve_list, but the examples use two bytes.
383 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
384 * resolves this to two bytes.
386 s2n(s->tlsext_ellipticcurvelist_length, ret);
387 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
388 ret+=s->tlsext_ellipticcurvelist_length;
390 #endif /* OPENSSL_NO_EC */
392 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
395 if (!s->new_session && s->session && s->session->tlsext_tick)
396 ticklen = s->session->tlsext_ticklen;
397 else if (s->session && s->tlsext_session_ticket &&
398 s->tlsext_session_ticket->data)
400 ticklen = s->tlsext_session_ticket->length;
401 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
402 if (!s->session->tlsext_tick)
404 memcpy(s->session->tlsext_tick,
405 s->tlsext_session_ticket->data,
407 s->session->tlsext_ticklen = ticklen;
411 if (ticklen == 0 && s->tlsext_session_ticket &&
412 s->tlsext_session_ticket->data == NULL)
414 /* Check for enough room 2 for extension type, 2 for len
417 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
418 s2n(TLSEXT_TYPE_session_ticket,ret);
422 memcpy(ret, s->session->tlsext_tick, ticklen);
428 #ifdef TLSEXT_TYPE_opaque_prf_input
429 if (s->s3->client_opaque_prf_input != NULL &&
430 s->version != DTLS1_VERSION)
432 size_t col = s->s3->client_opaque_prf_input_len;
434 if ((long)(limit - ret - 6 - col < 0))
436 if (col > 0xFFFD) /* can't happen */
439 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
442 memcpy(ret, s->s3->client_opaque_prf_input, col);
447 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
448 s->version != DTLS1_VERSION)
451 long extlen, idlen, itmp;
455 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
457 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
458 itmp = i2d_OCSP_RESPID(id, NULL);
464 if (s->tlsext_ocsp_exts)
466 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
473 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
474 s2n(TLSEXT_TYPE_status_request, ret);
475 if (extlen + idlen > 0xFFF0)
477 s2n(extlen + idlen + 5, ret);
478 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
480 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
482 /* save position of id len */
483 unsigned char *q = ret;
484 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
485 /* skip over id len */
487 itmp = i2d_OCSP_RESPID(id, &ret);
493 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
496 if ((extdatalen = ret-p-2)== 0)
503 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
506 unsigned char *ret = p;
508 /* don't add extensions for SSLv3, unless doing secure renegotiation */
509 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
513 if (ret>=limit) return NULL; /* this really never occurs, but ... */
515 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
517 if ((long)(limit - ret - 4) < 0) return NULL;
519 s2n(TLSEXT_TYPE_server_name,ret);
523 if(s->s3->send_connection_binding)
527 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
529 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
533 if((limit - p - 4 - el) < 0) return NULL;
535 s2n(TLSEXT_TYPE_renegotiate,ret);
538 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
540 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
547 #ifndef OPENSSL_NO_EC
548 if (s->tlsext_ecpointformatlist != NULL &&
549 s->version != DTLS1_VERSION)
551 /* Add TLS extension ECPointFormats to the ServerHello message */
554 if ((lenmax = limit - ret - 5) < 0) return NULL;
555 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
556 if (s->tlsext_ecpointformatlist_length > 255)
558 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
562 s2n(TLSEXT_TYPE_ec_point_formats,ret);
563 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
564 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
565 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
566 ret+=s->tlsext_ecpointformatlist_length;
569 /* Currently the server should not respond with a SupportedCurves extension */
570 #endif /* OPENSSL_NO_EC */
572 if (s->tlsext_ticket_expected
573 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
575 if ((long)(limit - ret - 4) < 0) return NULL;
576 s2n(TLSEXT_TYPE_session_ticket,ret);
580 if (s->tlsext_status_expected)
582 if ((long)(limit - ret - 4) < 0) return NULL;
583 s2n(TLSEXT_TYPE_status_request,ret);
587 #ifdef TLSEXT_TYPE_opaque_prf_input
588 if (s->s3->server_opaque_prf_input != NULL &&
589 s->version != DTLS1_VERSION)
591 size_t sol = s->s3->server_opaque_prf_input_len;
593 if ((long)(limit - ret - 6 - sol) < 0)
595 if (sol > 0xFFFD) /* can't happen */
598 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
601 memcpy(ret, s->s3->server_opaque_prf_input, sol);
605 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
606 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
607 { const unsigned char cryptopro_ext[36] = {
608 0xfd, 0xe8, /*65000*/
609 0x00, 0x20, /*32 bytes length*/
610 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
611 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
612 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
613 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
614 if (limit-ret<36) return NULL;
615 memcpy(ret,cryptopro_ext,36);
620 if ((extdatalen = ret-p-2)== 0)
627 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
632 unsigned char *data = *p;
633 int renegotiate_seen = 0;
635 s->servername_done = 0;
636 s->tlsext_status_type = -1;
642 if (data > (d+n-len))
645 while (data <= (d+n-4))
650 if (data+size > (d+n))
653 fprintf(stderr,"Received extension type %d size %d\n",type,size);
655 if (s->tlsext_debug_cb)
656 s->tlsext_debug_cb(s, 0, type, data, size,
657 s->tlsext_debug_arg);
658 /* The servername extension is treated as follows:
660 - Only the hostname type is supported with a maximum length of 255.
661 - The servername is rejected if too long or if it contains zeros,
662 in which case an fatal alert is generated.
663 - The servername field is maintained together with the session cache.
664 - When a session is resumed, the servername call back invoked in order
665 to allow the application to position itself to the right context.
666 - The servername is acknowledged if it is new for a session or when
667 it is identical to a previously used for the same session.
668 Applications can control the behaviour. They can at any time
669 set a 'desirable' servername for a new SSL object. This can be the
670 case for example with HTTPS when a Host: header field is received and
671 a renegotiation is requested. In this case, a possible servername
672 presented in the new client hello is only acknowledged if it matches
673 the value of the Host: field.
674 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
675 if they provide for changing an explicit servername context for the session,
676 i.e. when the session has been established with a servername extension.
677 - On session reconnect, the servername extension may be absent.
681 if (type == TLSEXT_TYPE_server_name)
683 unsigned char *sdata;
689 *al = SSL_AD_DECODE_ERROR;
696 *al = SSL_AD_DECODE_ERROR;
703 servname_type = *(sdata++);
709 *al = SSL_AD_DECODE_ERROR;
712 if (s->servername_done == 0)
713 switch (servname_type)
715 case TLSEXT_NAMETYPE_host_name:
716 if (s->session->tlsext_hostname == NULL)
718 if (len > TLSEXT_MAXLEN_host_name ||
719 ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL))
721 *al = TLS1_AD_UNRECOGNIZED_NAME;
724 memcpy(s->session->tlsext_hostname, sdata, len);
725 s->session->tlsext_hostname[len]='\0';
726 if (strlen(s->session->tlsext_hostname) != len) {
727 OPENSSL_free(s->session->tlsext_hostname);
728 s->session->tlsext_hostname = NULL;
729 *al = TLS1_AD_UNRECOGNIZED_NAME;
732 s->servername_done = 1;
736 s->servername_done = strlen(s->session->tlsext_hostname) == len
737 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
749 *al = SSL_AD_DECODE_ERROR;
755 #ifndef OPENSSL_NO_EC
756 else if (type == TLSEXT_TYPE_ec_point_formats &&
757 s->version != DTLS1_VERSION)
759 unsigned char *sdata = data;
760 int ecpointformatlist_length = *(sdata++);
762 if (ecpointformatlist_length != size - 1)
764 *al = TLS1_AD_DECODE_ERROR;
767 s->session->tlsext_ecpointformatlist_length = 0;
768 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
769 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
771 *al = TLS1_AD_INTERNAL_ERROR;
774 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
775 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
777 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
778 sdata = s->session->tlsext_ecpointformatlist;
779 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
780 fprintf(stderr,"%i ",*(sdata++));
781 fprintf(stderr,"\n");
784 else if (type == TLSEXT_TYPE_elliptic_curves &&
785 s->version != DTLS1_VERSION)
787 unsigned char *sdata = data;
788 int ellipticcurvelist_length = (*(sdata++) << 8);
789 ellipticcurvelist_length += (*(sdata++));
791 if (ellipticcurvelist_length != size - 2)
793 *al = TLS1_AD_DECODE_ERROR;
796 s->session->tlsext_ellipticcurvelist_length = 0;
797 if (s->session->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->session->tlsext_ellipticcurvelist);
798 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
800 *al = TLS1_AD_INTERNAL_ERROR;
803 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
804 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
806 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
807 sdata = s->session->tlsext_ellipticcurvelist;
808 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
809 fprintf(stderr,"%i ",*(sdata++));
810 fprintf(stderr,"\n");
813 #endif /* OPENSSL_NO_EC */
814 #ifdef TLSEXT_TYPE_opaque_prf_input
815 else if (type == TLSEXT_TYPE_opaque_prf_input &&
816 s->version != DTLS1_VERSION)
818 unsigned char *sdata = data;
822 *al = SSL_AD_DECODE_ERROR;
825 n2s(sdata, s->s3->client_opaque_prf_input_len);
826 if (s->s3->client_opaque_prf_input_len != size - 2)
828 *al = SSL_AD_DECODE_ERROR;
832 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
833 OPENSSL_free(s->s3->client_opaque_prf_input);
834 if (s->s3->client_opaque_prf_input_len == 0)
835 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
837 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
838 if (s->s3->client_opaque_prf_input == NULL)
840 *al = TLS1_AD_INTERNAL_ERROR;
845 else if (type == TLSEXT_TYPE_session_ticket)
847 if (s->tls_session_ticket_ext_cb &&
848 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
850 *al = TLS1_AD_INTERNAL_ERROR;
854 else if (type == TLSEXT_TYPE_renegotiate)
856 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
858 renegotiate_seen = 1;
860 else if (type == TLSEXT_TYPE_status_request &&
861 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
866 *al = SSL_AD_DECODE_ERROR;
870 s->tlsext_status_type = *data++;
872 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
874 const unsigned char *sdata;
876 /* Read in responder_id_list */
881 *al = SSL_AD_DECODE_ERROR;
890 *al = SSL_AD_DECODE_ERROR;
897 *al = SSL_AD_DECODE_ERROR;
902 id = d2i_OCSP_RESPID(NULL,
906 *al = SSL_AD_DECODE_ERROR;
911 OCSP_RESPID_free(id);
912 *al = SSL_AD_DECODE_ERROR;
915 if (!s->tlsext_ocsp_ids
916 && !(s->tlsext_ocsp_ids =
917 sk_OCSP_RESPID_new_null()))
919 OCSP_RESPID_free(id);
920 *al = SSL_AD_INTERNAL_ERROR;
923 if (!sk_OCSP_RESPID_push(
924 s->tlsext_ocsp_ids, id))
926 OCSP_RESPID_free(id);
927 *al = SSL_AD_INTERNAL_ERROR;
932 /* Read in request_extensions */
937 *al = SSL_AD_DECODE_ERROR;
943 s->tlsext_ocsp_exts =
944 d2i_X509_EXTENSIONS(NULL,
946 if (!s->tlsext_ocsp_exts
947 || (data + dsize != sdata))
949 *al = SSL_AD_DECODE_ERROR;
954 /* We don't know what to do with any other type
958 s->tlsext_status_type = -1;
961 /* session ticket processed earlier */
969 /* Need RI if renegotiating */
971 if (!renegotiate_seen && s->new_session &&
972 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
974 /* FIXME: Spec currently doesn't give alert to use */
975 *al = SSL_AD_ILLEGAL_PARAMETER;
976 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
977 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
984 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
989 unsigned char *data = *p;
990 int tlsext_servername = 0;
991 int renegotiate_seen = 0;
998 while(data <= (d+n-4))
1003 if (data+size > (d+n))
1006 if (s->tlsext_debug_cb)
1007 s->tlsext_debug_cb(s, 1, type, data, size,
1008 s->tlsext_debug_arg);
1010 if (type == TLSEXT_TYPE_server_name)
1012 if (s->tlsext_hostname == NULL || size > 0)
1014 *al = TLS1_AD_UNRECOGNIZED_NAME;
1017 tlsext_servername = 1;
1020 #ifndef OPENSSL_NO_EC
1021 else if (type == TLSEXT_TYPE_ec_point_formats &&
1022 s->version != DTLS1_VERSION)
1024 unsigned char *sdata = data;
1025 int ecpointformatlist_length = *(sdata++);
1027 if (ecpointformatlist_length != size - 1)
1029 *al = TLS1_AD_DECODE_ERROR;
1032 s->session->tlsext_ecpointformatlist_length = 0;
1033 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1034 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1036 *al = TLS1_AD_INTERNAL_ERROR;
1039 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1040 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1042 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1043 sdata = s->session->tlsext_ecpointformatlist;
1044 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1045 fprintf(stderr,"%i ",*(sdata++));
1046 fprintf(stderr,"\n");
1049 #endif /* OPENSSL_NO_EC */
1051 else if (type == TLSEXT_TYPE_session_ticket)
1053 if (s->tls_session_ticket_ext_cb &&
1054 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1056 *al = TLS1_AD_INTERNAL_ERROR;
1059 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1062 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1065 s->tlsext_ticket_expected = 1;
1067 #ifdef TLSEXT_TYPE_opaque_prf_input
1068 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1069 s->version != DTLS1_VERSION)
1071 unsigned char *sdata = data;
1075 *al = SSL_AD_DECODE_ERROR;
1078 n2s(sdata, s->s3->server_opaque_prf_input_len);
1079 if (s->s3->server_opaque_prf_input_len != size - 2)
1081 *al = SSL_AD_DECODE_ERROR;
1085 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1086 OPENSSL_free(s->s3->server_opaque_prf_input);
1087 if (s->s3->server_opaque_prf_input_len == 0)
1088 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1090 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1092 if (s->s3->server_opaque_prf_input == NULL)
1094 *al = TLS1_AD_INTERNAL_ERROR;
1099 else if (type == TLSEXT_TYPE_status_request &&
1100 s->version != DTLS1_VERSION)
1102 /* MUST be empty and only sent if we've requested
1103 * a status request message.
1105 if ((s->tlsext_status_type == -1) || (size > 0))
1107 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1110 /* Set flag to expect CertificateStatus message */
1111 s->tlsext_status_expected = 1;
1113 else if (type == TLSEXT_TYPE_renegotiate)
1115 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1117 renegotiate_seen = 1;
1124 *al = SSL_AD_DECODE_ERROR;
1128 if (!s->hit && tlsext_servername == 1)
1130 if (s->tlsext_hostname)
1132 if (s->session->tlsext_hostname == NULL)
1134 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1135 if (!s->session->tlsext_hostname)
1137 *al = SSL_AD_UNRECOGNIZED_NAME;
1143 *al = SSL_AD_DECODE_ERROR;
1153 /* Determine if we need to see RI. Strictly speaking if we want to
1154 * avoid an attack we should *always* see RI even on initial server
1155 * hello because the client doesn't see any renegotiation during an
1156 * attack. However this would mean we could not connect to any server
1157 * which doesn't support RI so for the immediate future tolerate RI
1158 * absence on initial connect only.
1160 if (!renegotiate_seen &&
1161 (s->new_session || !(s->options & SSL_OP_LEGACY_SERVER_CONNECT))
1162 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1164 /* FIXME: Spec currently doesn't give alert to use */
1165 *al = SSL_AD_ILLEGAL_PARAMETER;
1166 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
1167 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1175 int ssl_prepare_clienthello_tlsext(SSL *s)
1177 #ifndef OPENSSL_NO_EC
1178 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1179 * and elliptic curves we support.
1184 unsigned long alg_k, alg_a;
1185 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1187 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1189 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1191 alg_k = c->algorithm_mkey;
1192 alg_a = c->algorithm_auth;
1193 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1199 using_ecc = using_ecc && (s->version == TLS1_VERSION);
1202 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1203 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1205 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1208 s->tlsext_ecpointformatlist_length = 3;
1209 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1210 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1211 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1213 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1214 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1215 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1216 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1218 s->tlsext_ellipticcurvelist_length = 0;
1219 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1222 for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <=
1223 sizeof(nid_list)/sizeof(nid_list[0]); i++)
1226 #endif /* OPENSSL_NO_EC */
1228 #ifdef TLSEXT_TYPE_opaque_prf_input
1232 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1234 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1239 if (s->tlsext_opaque_prf_input != NULL)
1241 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1242 OPENSSL_free(s->s3->client_opaque_prf_input);
1244 if (s->tlsext_opaque_prf_input_len == 0)
1245 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1247 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1248 if (s->s3->client_opaque_prf_input == NULL)
1250 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1253 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1257 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1258 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1265 int ssl_prepare_serverhello_tlsext(SSL *s)
1267 #ifndef OPENSSL_NO_EC
1268 /* If we are server and using an ECC cipher suite, send the point formats we support
1269 * if the client sent us an ECPointsFormat extension. Note that the server is not
1270 * supposed to send an EllipticCurves extension.
1273 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1274 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1275 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1276 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1280 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1281 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1283 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1286 s->tlsext_ecpointformatlist_length = 3;
1287 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1288 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1289 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1291 #endif /* OPENSSL_NO_EC */
1296 int ssl_check_clienthello_tlsext(SSL *s)
1298 int ret=SSL_TLSEXT_ERR_NOACK;
1299 int al = SSL_AD_UNRECOGNIZED_NAME;
1301 #ifndef OPENSSL_NO_EC
1302 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1303 * ssl3_choose_cipher in s3_lib.c.
1305 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1306 * ssl3_choose_cipher in s3_lib.c.
1310 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1311 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1312 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1313 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1315 /* If status request then ask callback what to do.
1316 * Note: this must be called after servername callbacks in case
1317 * the certificate has changed.
1319 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1322 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1325 /* We don't want to send a status request response */
1326 case SSL_TLSEXT_ERR_NOACK:
1327 s->tlsext_status_expected = 0;
1329 /* status request response should be sent */
1330 case SSL_TLSEXT_ERR_OK:
1331 if (s->tlsext_ocsp_resp)
1332 s->tlsext_status_expected = 1;
1334 s->tlsext_status_expected = 0;
1336 /* something bad happened */
1337 case SSL_TLSEXT_ERR_ALERT_FATAL:
1338 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1339 al = SSL_AD_INTERNAL_ERROR;
1344 s->tlsext_status_expected = 0;
1346 #ifdef TLSEXT_TYPE_opaque_prf_input
1348 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1349 * but we might be sending an alert in response to the client hello,
1350 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1354 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1356 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1359 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1360 al = SSL_AD_INTERNAL_ERROR;
1365 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1366 OPENSSL_free(s->s3->server_opaque_prf_input);
1367 s->s3->server_opaque_prf_input = NULL;
1369 if (s->tlsext_opaque_prf_input != NULL)
1371 if (s->s3->client_opaque_prf_input != NULL &&
1372 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1374 /* can only use this extension if we have a server opaque PRF input
1375 * of the same length as the client opaque PRF input! */
1377 if (s->tlsext_opaque_prf_input_len == 0)
1378 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1380 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1381 if (s->s3->server_opaque_prf_input == NULL)
1383 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1384 al = SSL_AD_INTERNAL_ERROR;
1387 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1391 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1393 /* The callback wants to enforce use of the extension,
1394 * but we can't do that with the client opaque PRF input;
1395 * abort the handshake.
1397 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1398 al = SSL_AD_HANDSHAKE_FAILURE;
1406 case SSL_TLSEXT_ERR_ALERT_FATAL:
1407 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1410 case SSL_TLSEXT_ERR_ALERT_WARNING:
1411 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1414 case SSL_TLSEXT_ERR_NOACK:
1415 s->servername_done=0;
1421 int ssl_check_serverhello_tlsext(SSL *s)
1423 int ret=SSL_TLSEXT_ERR_NOACK;
1424 int al = SSL_AD_UNRECOGNIZED_NAME;
1426 #ifndef OPENSSL_NO_EC
1427 /* If we are client and using an elliptic curve cryptography cipher suite, then server
1428 * must return a an EC point formats lists containing uncompressed.
1430 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1431 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1432 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1433 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1435 /* we are using an ECC cipher */
1437 unsigned char *list;
1438 int found_uncompressed = 0;
1439 if ((s->session->tlsext_ecpointformatlist == NULL) || (s->session->tlsext_ecpointformatlist_length == 0))
1441 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1444 list = s->session->tlsext_ecpointformatlist;
1445 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1447 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1449 found_uncompressed = 1;
1453 if (!found_uncompressed)
1455 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1459 ret = SSL_TLSEXT_ERR_OK;
1460 #endif /* OPENSSL_NO_EC */
1462 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1463 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1464 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1465 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1467 #ifdef TLSEXT_TYPE_opaque_prf_input
1468 if (s->s3->server_opaque_prf_input_len > 0)
1470 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1471 * So first verify that we really have a value from the server too. */
1473 if (s->s3->server_opaque_prf_input == NULL)
1475 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1476 al = SSL_AD_HANDSHAKE_FAILURE;
1479 /* Anytime the server *has* sent an opaque PRF input, we need to check
1480 * that we have a client opaque PRF input of the same size. */
1481 if (s->s3->client_opaque_prf_input == NULL ||
1482 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1484 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1485 al = SSL_AD_ILLEGAL_PARAMETER;
1490 /* If we've requested certificate status and we wont get one
1493 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1494 && s->ctx && s->ctx->tlsext_status_cb)
1497 /* Set resp to NULL, resplen to -1 so callback knows
1498 * there is no response.
1500 if (s->tlsext_ocsp_resp)
1502 OPENSSL_free(s->tlsext_ocsp_resp);
1503 s->tlsext_ocsp_resp = NULL;
1505 s->tlsext_ocsp_resplen = -1;
1506 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1509 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1510 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1514 al = SSL_AD_INTERNAL_ERROR;
1515 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1521 case SSL_TLSEXT_ERR_ALERT_FATAL:
1522 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1525 case SSL_TLSEXT_ERR_ALERT_WARNING:
1526 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1529 case SSL_TLSEXT_ERR_NOACK:
1530 s->servername_done=0;
1536 /* Since the server cache lookup is done early on in the processing of client
1537 * hello and other operations depend on the result we need to handle any TLS
1538 * session ticket extension at the same time.
1541 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1542 const unsigned char *limit, SSL_SESSION **ret)
1544 /* Point after session ID in client hello */
1545 const unsigned char *p = session_id + len;
1548 /* If tickets disabled behave as if no ticket present
1549 * to permit stateful resumption.
1551 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1554 if ((s->version <= SSL3_VERSION) || !limit)
1558 /* Skip past DTLS cookie */
1559 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
1566 /* Skip past cipher list */
1571 /* Skip past compression algorithm list */
1576 /* Now at start of extensions */
1577 if ((p + 2) >= limit)
1580 while ((p + 4) <= limit)
1582 unsigned short type, size;
1585 if (p + size > limit)
1587 if (type == TLSEXT_TYPE_session_ticket)
1589 /* If tickets disabled indicate cache miss which will
1590 * trigger a full handshake
1592 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1594 /* If zero length note client will accept a ticket
1595 * and indicate cache miss to trigger full handshake
1599 s->tlsext_ticket_expected = 1;
1600 return 0; /* Cache miss */
1602 if (s->tls_session_secret_cb)
1604 /* Indicate cache miss here and instead of
1605 * generating the session from ticket now,
1606 * trigger abbreviated handshake based on
1607 * external mechanism to calculate the master
1611 return tls_decrypt_ticket(s, p, size, session_id, len,
1619 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1620 const unsigned char *sess_id, int sesslen,
1621 SSL_SESSION **psess)
1624 unsigned char *sdec;
1625 const unsigned char *p;
1626 int slen, mlen, renew_ticket = 0;
1627 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1630 SSL_CTX *tctx = s->initial_ctx;
1631 /* Need at least keyname + iv + some encrypted data */
1634 /* Initialize session ticket encryption and HMAC contexts */
1635 HMAC_CTX_init(&hctx);
1636 EVP_CIPHER_CTX_init(&ctx);
1637 if (tctx->tlsext_ticket_key_cb)
1639 unsigned char *nctick = (unsigned char *)etick;
1640 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
1651 /* Check key name matches */
1652 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
1654 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1655 tlsext_tick_md(), NULL);
1656 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1657 tctx->tlsext_tick_aes_key, etick + 16);
1659 /* Attempt to process session ticket, first conduct sanity and
1660 * integrity checks on ticket.
1662 mlen = HMAC_size(&hctx);
1665 EVP_CIPHER_CTX_cleanup(&ctx);
1669 /* Check HMAC of encrypted ticket */
1670 HMAC_Update(&hctx, etick, eticklen);
1671 HMAC_Final(&hctx, tick_hmac, NULL);
1672 HMAC_CTX_cleanup(&hctx);
1673 if (memcmp(tick_hmac, etick + eticklen, mlen))
1675 /* Attempt to decrypt session data */
1676 /* Move p after IV to start of encrypted ticket, update length */
1677 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1678 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1679 sdec = OPENSSL_malloc(eticklen);
1682 EVP_CIPHER_CTX_cleanup(&ctx);
1685 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1686 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1689 EVP_CIPHER_CTX_cleanup(&ctx);
1692 sess = d2i_SSL_SESSION(NULL, &p, slen);
1696 /* The session ID if non-empty is used by some clients to
1697 * detect that the ticket has been accepted. So we copy it to
1698 * the session structure. If it is empty set length to zero
1699 * as required by standard.
1702 memcpy(sess->session_id, sess_id, sesslen);
1703 sess->session_id_length = sesslen;
1705 s->tlsext_ticket_expected = renew_ticket;
1708 /* If session decrypt failure indicate a cache miss and set state to
1712 s->tlsext_ticket_expected = 1;