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=TLS1_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;
641 && !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
643 /* We should always see one extension: the renegotiate extension */
644 *al = SSL_AD_ILLEGAL_PARAMETER; /* is this the right alert? */
645 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
652 if (data > (d+n-len))
655 while (data <= (d+n-4))
660 if (data+size > (d+n))
663 fprintf(stderr,"Received extension type %d size %d\n",type,size);
665 if (s->tlsext_debug_cb)
666 s->tlsext_debug_cb(s, 0, type, data, size,
667 s->tlsext_debug_arg);
668 /* The servername extension is treated as follows:
670 - Only the hostname type is supported with a maximum length of 255.
671 - The servername is rejected if too long or if it contains zeros,
672 in which case an fatal alert is generated.
673 - The servername field is maintained together with the session cache.
674 - When a session is resumed, the servername call back invoked in order
675 to allow the application to position itself to the right context.
676 - The servername is acknowledged if it is new for a session or when
677 it is identical to a previously used for the same session.
678 Applications can control the behaviour. They can at any time
679 set a 'desirable' servername for a new SSL object. This can be the
680 case for example with HTTPS when a Host: header field is received and
681 a renegotiation is requested. In this case, a possible servername
682 presented in the new client hello is only acknowledged if it matches
683 the value of the Host: field.
684 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
685 if they provide for changing an explicit servername context for the session,
686 i.e. when the session has been established with a servername extension.
687 - On session reconnect, the servername extension may be absent.
691 if (type == TLSEXT_TYPE_server_name)
693 unsigned char *sdata;
699 *al = SSL_AD_DECODE_ERROR;
706 *al = SSL_AD_DECODE_ERROR;
713 servname_type = *(sdata++);
719 *al = SSL_AD_DECODE_ERROR;
722 if (s->servername_done == 0)
723 switch (servname_type)
725 case TLSEXT_NAMETYPE_host_name:
726 if (s->session->tlsext_hostname == NULL)
728 if (len > TLSEXT_MAXLEN_host_name ||
729 ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL))
731 *al = TLS1_AD_UNRECOGNIZED_NAME;
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 = strlen(s->session->tlsext_hostname) == len
747 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
759 *al = SSL_AD_DECODE_ERROR;
765 #ifndef OPENSSL_NO_EC
766 else if (type == TLSEXT_TYPE_ec_point_formats &&
767 s->version != DTLS1_VERSION)
769 unsigned char *sdata = data;
770 int ecpointformatlist_length = *(sdata++);
772 if (ecpointformatlist_length != size - 1)
774 *al = TLS1_AD_DECODE_ERROR;
777 s->session->tlsext_ecpointformatlist_length = 0;
778 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
779 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
781 *al = TLS1_AD_INTERNAL_ERROR;
784 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
785 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
787 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
788 sdata = s->session->tlsext_ecpointformatlist;
789 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
790 fprintf(stderr,"%i ",*(sdata++));
791 fprintf(stderr,"\n");
794 else if (type == TLSEXT_TYPE_elliptic_curves &&
795 s->version != DTLS1_VERSION)
797 unsigned char *sdata = data;
798 int ellipticcurvelist_length = (*(sdata++) << 8);
799 ellipticcurvelist_length += (*(sdata++));
801 if (ellipticcurvelist_length != size - 2)
803 *al = TLS1_AD_DECODE_ERROR;
806 s->session->tlsext_ellipticcurvelist_length = 0;
807 if (s->session->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->session->tlsext_ellipticcurvelist);
808 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
810 *al = TLS1_AD_INTERNAL_ERROR;
813 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
814 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
816 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
817 sdata = s->session->tlsext_ellipticcurvelist;
818 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
819 fprintf(stderr,"%i ",*(sdata++));
820 fprintf(stderr,"\n");
823 #endif /* OPENSSL_NO_EC */
824 #ifdef TLSEXT_TYPE_opaque_prf_input
825 else if (type == TLSEXT_TYPE_opaque_prf_input &&
826 s->version != DTLS1_VERSION)
828 unsigned char *sdata = data;
832 *al = SSL_AD_DECODE_ERROR;
835 n2s(sdata, s->s3->client_opaque_prf_input_len);
836 if (s->s3->client_opaque_prf_input_len != size - 2)
838 *al = SSL_AD_DECODE_ERROR;
842 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
843 OPENSSL_free(s->s3->client_opaque_prf_input);
844 if (s->s3->client_opaque_prf_input_len == 0)
845 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
847 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
848 if (s->s3->client_opaque_prf_input == NULL)
850 *al = TLS1_AD_INTERNAL_ERROR;
855 else if (type == TLSEXT_TYPE_session_ticket)
857 if (s->tls_session_ticket_ext_cb &&
858 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
860 *al = TLS1_AD_INTERNAL_ERROR;
864 else if (type == TLSEXT_TYPE_renegotiate)
866 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
868 renegotiate_seen = 1;
870 else if (type == TLSEXT_TYPE_status_request &&
871 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
876 *al = SSL_AD_DECODE_ERROR;
880 s->tlsext_status_type = *data++;
882 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
884 const unsigned char *sdata;
886 /* Read in responder_id_list */
891 *al = SSL_AD_DECODE_ERROR;
900 *al = SSL_AD_DECODE_ERROR;
907 *al = SSL_AD_DECODE_ERROR;
912 id = d2i_OCSP_RESPID(NULL,
916 *al = SSL_AD_DECODE_ERROR;
921 OCSP_RESPID_free(id);
922 *al = SSL_AD_DECODE_ERROR;
925 if (!s->tlsext_ocsp_ids
926 && !(s->tlsext_ocsp_ids =
927 sk_OCSP_RESPID_new_null()))
929 OCSP_RESPID_free(id);
930 *al = SSL_AD_INTERNAL_ERROR;
933 if (!sk_OCSP_RESPID_push(
934 s->tlsext_ocsp_ids, id))
936 OCSP_RESPID_free(id);
937 *al = SSL_AD_INTERNAL_ERROR;
942 /* Read in request_extensions */
947 *al = SSL_AD_DECODE_ERROR;
953 s->tlsext_ocsp_exts =
954 d2i_X509_EXTENSIONS(NULL,
956 if (!s->tlsext_ocsp_exts
957 || (data + dsize != sdata))
959 *al = SSL_AD_DECODE_ERROR;
964 /* We don't know what to do with any other type
968 s->tlsext_status_type = -1;
971 /* session ticket processed earlier */
975 if (s->new_session && !renegotiate_seen
976 && !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
978 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
979 *al = SSL_AD_ILLEGAL_PARAMETER; /* is this the right alert? */
988 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
993 unsigned char *data = *p;
994 int tlsext_servername = 0;
995 int renegotiate_seen = 0;
999 /* Because the client does not see any renegotiation during an
1000 attack, we must enforce this on all server hellos, even the
1002 if (!(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1004 /* We should always see one extension: the renegotiate extension */
1005 *al = SSL_AD_ILLEGAL_PARAMETER; /* is this the right alert? */
1006 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1014 while(data <= (d+n-4))
1019 if (data+size > (d+n))
1022 if (s->tlsext_debug_cb)
1023 s->tlsext_debug_cb(s, 1, type, data, size,
1024 s->tlsext_debug_arg);
1026 if (type == TLSEXT_TYPE_server_name)
1028 if (s->tlsext_hostname == NULL || size > 0)
1030 *al = TLS1_AD_UNRECOGNIZED_NAME;
1033 tlsext_servername = 1;
1036 #ifndef OPENSSL_NO_EC
1037 else if (type == TLSEXT_TYPE_ec_point_formats &&
1038 s->version != DTLS1_VERSION)
1040 unsigned char *sdata = data;
1041 int ecpointformatlist_length = *(sdata++);
1043 if (ecpointformatlist_length != size - 1)
1045 *al = TLS1_AD_DECODE_ERROR;
1048 s->session->tlsext_ecpointformatlist_length = 0;
1049 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1050 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1052 *al = TLS1_AD_INTERNAL_ERROR;
1055 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1056 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1058 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1059 sdata = s->session->tlsext_ecpointformatlist;
1060 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1061 fprintf(stderr,"%i ",*(sdata++));
1062 fprintf(stderr,"\n");
1065 #endif /* OPENSSL_NO_EC */
1067 else if (type == TLSEXT_TYPE_session_ticket)
1069 if (s->tls_session_ticket_ext_cb &&
1070 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1072 *al = TLS1_AD_INTERNAL_ERROR;
1075 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1078 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1081 s->tlsext_ticket_expected = 1;
1083 #ifdef TLSEXT_TYPE_opaque_prf_input
1084 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1085 s->version != DTLS1_VERSION)
1087 unsigned char *sdata = data;
1091 *al = SSL_AD_DECODE_ERROR;
1094 n2s(sdata, s->s3->server_opaque_prf_input_len);
1095 if (s->s3->server_opaque_prf_input_len != size - 2)
1097 *al = SSL_AD_DECODE_ERROR;
1101 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1102 OPENSSL_free(s->s3->server_opaque_prf_input);
1103 if (s->s3->server_opaque_prf_input_len == 0)
1104 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1106 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1108 if (s->s3->server_opaque_prf_input == NULL)
1110 *al = TLS1_AD_INTERNAL_ERROR;
1115 else if (type == TLSEXT_TYPE_status_request &&
1116 s->version != DTLS1_VERSION)
1118 /* MUST be empty and only sent if we've requested
1119 * a status request message.
1121 if ((s->tlsext_status_type == -1) || (size > 0))
1123 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1126 /* Set flag to expect CertificateStatus message */
1127 s->tlsext_status_expected = 1;
1129 else if (type == TLSEXT_TYPE_renegotiate)
1131 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1133 renegotiate_seen = 1;
1140 *al = SSL_AD_DECODE_ERROR;
1144 if (!renegotiate_seen
1145 && !(s->ctx->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1147 *al = SSL_AD_ILLEGAL_PARAMETER; /* is this the right alert? */
1148 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT, SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1152 if (!s->hit && tlsext_servername == 1)
1154 if (s->tlsext_hostname)
1156 if (s->session->tlsext_hostname == NULL)
1158 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1159 if (!s->session->tlsext_hostname)
1161 *al = SSL_AD_UNRECOGNIZED_NAME;
1167 *al = SSL_AD_DECODE_ERROR;
1178 int ssl_prepare_clienthello_tlsext(SSL *s)
1180 #ifndef OPENSSL_NO_EC
1181 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1182 * and elliptic curves we support.
1187 unsigned long alg_k, alg_a;
1188 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1190 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1192 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1194 alg_k = c->algorithm_mkey;
1195 alg_a = c->algorithm_auth;
1196 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1202 using_ecc = using_ecc && (s->version == TLS1_VERSION);
1205 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1206 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1208 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1211 s->tlsext_ecpointformatlist_length = 3;
1212 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1213 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1214 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1216 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1217 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1218 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1219 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1221 s->tlsext_ellipticcurvelist_length = 0;
1222 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1225 for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <=
1226 sizeof(nid_list)/sizeof(nid_list[0]); i++)
1229 #endif /* OPENSSL_NO_EC */
1231 #ifdef TLSEXT_TYPE_opaque_prf_input
1235 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1237 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1242 if (s->tlsext_opaque_prf_input != NULL)
1244 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1245 OPENSSL_free(s->s3->client_opaque_prf_input);
1247 if (s->tlsext_opaque_prf_input_len == 0)
1248 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1250 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1251 if (s->s3->client_opaque_prf_input == NULL)
1253 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1256 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1260 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1261 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1268 int ssl_prepare_serverhello_tlsext(SSL *s)
1270 #ifndef OPENSSL_NO_EC
1271 /* If we are server and using an ECC cipher suite, send the point formats we support
1272 * if the client sent us an ECPointsFormat extension. Note that the server is not
1273 * supposed to send an EllipticCurves extension.
1276 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1277 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1278 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1279 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1283 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1284 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1286 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1289 s->tlsext_ecpointformatlist_length = 3;
1290 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1291 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1292 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1294 #endif /* OPENSSL_NO_EC */
1299 int ssl_check_clienthello_tlsext(SSL *s)
1301 int ret=SSL_TLSEXT_ERR_NOACK;
1302 int al = SSL_AD_UNRECOGNIZED_NAME;
1304 #ifndef OPENSSL_NO_EC
1305 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1306 * ssl3_choose_cipher in s3_lib.c.
1308 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1309 * ssl3_choose_cipher in s3_lib.c.
1313 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1314 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1315 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1316 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1318 /* If status request then ask callback what to do.
1319 * Note: this must be called after servername callbacks in case
1320 * the certificate has changed.
1322 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1325 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1328 /* We don't want to send a status request response */
1329 case SSL_TLSEXT_ERR_NOACK:
1330 s->tlsext_status_expected = 0;
1332 /* status request response should be sent */
1333 case SSL_TLSEXT_ERR_OK:
1334 if (s->tlsext_ocsp_resp)
1335 s->tlsext_status_expected = 1;
1337 s->tlsext_status_expected = 0;
1339 /* something bad happened */
1340 case SSL_TLSEXT_ERR_ALERT_FATAL:
1341 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1342 al = SSL_AD_INTERNAL_ERROR;
1347 s->tlsext_status_expected = 0;
1349 #ifdef TLSEXT_TYPE_opaque_prf_input
1351 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1352 * but we might be sending an alert in response to the client hello,
1353 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1357 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1359 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1362 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1363 al = SSL_AD_INTERNAL_ERROR;
1368 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1369 OPENSSL_free(s->s3->server_opaque_prf_input);
1370 s->s3->server_opaque_prf_input = NULL;
1372 if (s->tlsext_opaque_prf_input != NULL)
1374 if (s->s3->client_opaque_prf_input != NULL &&
1375 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1377 /* can only use this extension if we have a server opaque PRF input
1378 * of the same length as the client opaque PRF input! */
1380 if (s->tlsext_opaque_prf_input_len == 0)
1381 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1383 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1384 if (s->s3->server_opaque_prf_input == NULL)
1386 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1387 al = SSL_AD_INTERNAL_ERROR;
1390 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1394 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1396 /* The callback wants to enforce use of the extension,
1397 * but we can't do that with the client opaque PRF input;
1398 * abort the handshake.
1400 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1401 al = SSL_AD_HANDSHAKE_FAILURE;
1409 case SSL_TLSEXT_ERR_ALERT_FATAL:
1410 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1413 case SSL_TLSEXT_ERR_ALERT_WARNING:
1414 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1417 case SSL_TLSEXT_ERR_NOACK:
1418 s->servername_done=0;
1424 int ssl_check_serverhello_tlsext(SSL *s)
1426 int ret=SSL_TLSEXT_ERR_NOACK;
1427 int al = SSL_AD_UNRECOGNIZED_NAME;
1429 #ifndef OPENSSL_NO_EC
1430 /* If we are client and using an elliptic curve cryptography cipher suite, then server
1431 * must return a an EC point formats lists containing uncompressed.
1433 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1434 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1435 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1436 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1438 /* we are using an ECC cipher */
1440 unsigned char *list;
1441 int found_uncompressed = 0;
1442 if ((s->session->tlsext_ecpointformatlist == NULL) || (s->session->tlsext_ecpointformatlist_length == 0))
1444 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1447 list = s->session->tlsext_ecpointformatlist;
1448 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1450 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1452 found_uncompressed = 1;
1456 if (!found_uncompressed)
1458 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1462 ret = SSL_TLSEXT_ERR_OK;
1463 #endif /* OPENSSL_NO_EC */
1465 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1466 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1467 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1468 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1470 #ifdef TLSEXT_TYPE_opaque_prf_input
1471 if (s->s3->server_opaque_prf_input_len > 0)
1473 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1474 * So first verify that we really have a value from the server too. */
1476 if (s->s3->server_opaque_prf_input == NULL)
1478 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1479 al = SSL_AD_HANDSHAKE_FAILURE;
1482 /* Anytime the server *has* sent an opaque PRF input, we need to check
1483 * that we have a client opaque PRF input of the same size. */
1484 if (s->s3->client_opaque_prf_input == NULL ||
1485 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1487 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1488 al = SSL_AD_ILLEGAL_PARAMETER;
1493 /* If we've requested certificate status and we wont get one
1496 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1497 && s->ctx && s->ctx->tlsext_status_cb)
1500 /* Set resp to NULL, resplen to -1 so callback knows
1501 * there is no response.
1503 if (s->tlsext_ocsp_resp)
1505 OPENSSL_free(s->tlsext_ocsp_resp);
1506 s->tlsext_ocsp_resp = NULL;
1508 s->tlsext_ocsp_resplen = -1;
1509 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1512 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1513 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1517 al = SSL_AD_INTERNAL_ERROR;
1518 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1524 case SSL_TLSEXT_ERR_ALERT_FATAL:
1525 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1528 case SSL_TLSEXT_ERR_ALERT_WARNING:
1529 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1532 case SSL_TLSEXT_ERR_NOACK:
1533 s->servername_done=0;
1539 /* Since the server cache lookup is done early on in the processing of client
1540 * hello and other operations depend on the result we need to handle any TLS
1541 * session ticket extension at the same time.
1544 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1545 const unsigned char *limit, SSL_SESSION **ret)
1547 /* Point after session ID in client hello */
1548 const unsigned char *p = session_id + len;
1551 /* If tickets disabled behave as if no ticket present
1552 * to permit stateful resumption.
1554 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1557 if ((s->version <= SSL3_VERSION) || !limit)
1561 /* Skip past DTLS cookie */
1562 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
1569 /* Skip past cipher list */
1574 /* Skip past compression algorithm list */
1579 /* Now at start of extensions */
1580 if ((p + 2) >= limit)
1583 while ((p + 4) <= limit)
1585 unsigned short type, size;
1588 if (p + size > limit)
1590 if (type == TLSEXT_TYPE_session_ticket)
1592 /* If tickets disabled indicate cache miss which will
1593 * trigger a full handshake
1595 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1597 /* If zero length note client will accept a ticket
1598 * and indicate cache miss to trigger full handshake
1602 s->tlsext_ticket_expected = 1;
1603 return 0; /* Cache miss */
1605 if (s->tls_session_secret_cb)
1607 /* Indicate cache miss here and instead of
1608 * generating the session from ticket now,
1609 * trigger abbreviated handshake based on
1610 * external mechanism to calculate the master
1614 return tls_decrypt_ticket(s, p, size, session_id, len,
1622 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1623 const unsigned char *sess_id, int sesslen,
1624 SSL_SESSION **psess)
1627 unsigned char *sdec;
1628 const unsigned char *p;
1629 int slen, mlen, renew_ticket = 0;
1630 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1633 SSL_CTX *tctx = s->initial_ctx;
1634 /* Need at least keyname + iv + some encrypted data */
1637 /* Initialize session ticket encryption and HMAC contexts */
1638 HMAC_CTX_init(&hctx);
1639 EVP_CIPHER_CTX_init(&ctx);
1640 if (tctx->tlsext_ticket_key_cb)
1642 unsigned char *nctick = (unsigned char *)etick;
1643 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
1654 /* Check key name matches */
1655 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
1657 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1658 tlsext_tick_md(), NULL);
1659 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1660 tctx->tlsext_tick_aes_key, etick + 16);
1662 /* Attempt to process session ticket, first conduct sanity and
1663 * integrity checks on ticket.
1665 mlen = HMAC_size(&hctx);
1668 EVP_CIPHER_CTX_cleanup(&ctx);
1672 /* Check HMAC of encrypted ticket */
1673 HMAC_Update(&hctx, etick, eticklen);
1674 HMAC_Final(&hctx, tick_hmac, NULL);
1675 HMAC_CTX_cleanup(&hctx);
1676 if (memcmp(tick_hmac, etick + eticklen, mlen))
1678 /* Attempt to decrypt session data */
1679 /* Move p after IV to start of encrypted ticket, update length */
1680 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1681 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1682 sdec = OPENSSL_malloc(eticklen);
1685 EVP_CIPHER_CTX_cleanup(&ctx);
1688 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1689 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1692 EVP_CIPHER_CTX_cleanup(&ctx);
1695 sess = d2i_SSL_SESSION(NULL, &p, slen);
1699 /* The session ID if non-empty is used by some clients to
1700 * detect that the ticket has been accepted. So we copy it to
1701 * the session structure. If it is empty set length to zero
1702 * as required by standard.
1705 memcpy(sess->session_id, sess_id, sesslen);
1706 sess->session_id_length = sesslen;
1708 s->tlsext_ticket_expected = renew_ticket;
1711 /* If session decrypt failure indicate a cache miss and set state to
1715 s->tlsext_ticket_expected = 1;