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 */
279 if (s->client_version == SSL3_VERSION)
284 if (ret>=limit) return NULL; /* this really never occurs, but ... */
286 if (s->tlsext_hostname != NULL)
288 /* Add TLS extension servername to the Client Hello message */
289 unsigned long size_str;
292 /* check for enough space.
293 4 for the servername type and entension length
294 2 for servernamelist length
295 1 for the hostname type
296 2 for hostname length
300 if ((lenmax = limit - ret - 9) < 0
301 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
304 /* extension type and length */
305 s2n(TLSEXT_TYPE_server_name,ret);
308 /* length of servername list */
311 /* hostname type, length and hostname */
312 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
314 memcpy(ret, s->tlsext_hostname, size_str);
318 #ifndef OPENSSL_NO_EC
319 if (s->tlsext_ecpointformatlist != NULL)
321 /* Add TLS extension ECPointFormats to the ClientHello message */
324 if ((lenmax = limit - ret - 5) < 0) return NULL;
325 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
326 if (s->tlsext_ecpointformatlist_length > 255)
328 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
332 s2n(TLSEXT_TYPE_ec_point_formats,ret);
333 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
334 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
335 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
336 ret+=s->tlsext_ecpointformatlist_length;
338 if (s->tlsext_ellipticcurvelist != NULL)
340 /* Add TLS extension EllipticCurves to the ClientHello message */
343 if ((lenmax = limit - ret - 6) < 0) return NULL;
344 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
345 if (s->tlsext_ellipticcurvelist_length > 65532)
347 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
351 s2n(TLSEXT_TYPE_elliptic_curves,ret);
352 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
354 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
355 * elliptic_curve_list, but the examples use two bytes.
356 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
357 * resolves this to two bytes.
359 s2n(s->tlsext_ellipticcurvelist_length, ret);
360 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
361 ret+=s->tlsext_ellipticcurvelist_length;
363 #endif /* OPENSSL_NO_EC */
365 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
368 if (s->session && s->session->tlsext_tick)
369 ticklen = s->session->tlsext_ticklen;
370 else if (s->session && s->tlsext_session_ticket &&
371 s->tlsext_session_ticket->data)
373 ticklen = s->tlsext_session_ticket->length;
374 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
375 if (!s->session->tlsext_tick)
377 memcpy(s->session->tlsext_tick,
378 s->tlsext_session_ticket->data,
380 s->session->tlsext_ticklen = ticklen;
384 if (ticklen == 0 && s->tlsext_session_ticket &&
385 s->tlsext_session_ticket->data == NULL)
387 /* Check for enough room 2 for extension type, 2 for len
390 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
391 s2n(TLSEXT_TYPE_session_ticket,ret);
395 memcpy(ret, s->session->tlsext_tick, ticklen);
401 #ifdef TLSEXT_TYPE_opaque_prf_input
402 if (s->s3->client_opaque_prf_input != NULL)
404 size_t col = s->s3->client_opaque_prf_input_len;
406 if ((long)(limit - ret - 6 - col < 0))
408 if (col > 0xFFFD) /* can't happen */
411 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
414 memcpy(ret, s->s3->client_opaque_prf_input, col);
419 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
422 long extlen, idlen, itmp;
426 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
428 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
429 itmp = i2d_OCSP_RESPID(id, NULL);
435 if (s->tlsext_ocsp_exts)
437 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
444 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
445 s2n(TLSEXT_TYPE_status_request, ret);
446 if (extlen + idlen > 0xFFF0)
448 s2n(extlen + idlen + 5, ret);
449 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
451 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
453 /* save position of id len */
454 unsigned char *q = ret;
455 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
456 /* skip over id len */
458 itmp = i2d_OCSP_RESPID(id, &ret);
464 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
467 if ((extdatalen = ret-p-2)== 0)
474 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
477 unsigned char *ret = p;
479 /* don't add extensions for SSLv3 */
480 if (s->version == SSL3_VERSION)
484 if (ret>=limit) return NULL; /* this really never occurs, but ... */
486 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
488 if ((long)(limit - ret - 4) < 0) return NULL;
490 s2n(TLSEXT_TYPE_server_name,ret);
493 #ifndef OPENSSL_NO_EC
494 if (s->tlsext_ecpointformatlist != NULL)
496 /* Add TLS extension ECPointFormats to the ServerHello message */
499 if ((lenmax = limit - ret - 5) < 0) return NULL;
500 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
501 if (s->tlsext_ecpointformatlist_length > 255)
503 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
507 s2n(TLSEXT_TYPE_ec_point_formats,ret);
508 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
509 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
510 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
511 ret+=s->tlsext_ecpointformatlist_length;
514 /* Currently the server should not respond with a SupportedCurves extension */
515 #endif /* OPENSSL_NO_EC */
517 if (s->tlsext_ticket_expected
518 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
520 if ((long)(limit - ret - 4) < 0) return NULL;
521 s2n(TLSEXT_TYPE_session_ticket,ret);
525 if (s->tlsext_status_expected)
527 if ((long)(limit - ret - 4) < 0) return NULL;
528 s2n(TLSEXT_TYPE_status_request,ret);
532 #ifdef TLSEXT_TYPE_opaque_prf_input
533 if (s->s3->server_opaque_prf_input != NULL)
535 size_t sol = s->s3->server_opaque_prf_input_len;
537 if ((long)(limit - ret - 6 - sol) < 0)
539 if (sol > 0xFFFD) /* can't happen */
542 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
545 memcpy(ret, s->s3->server_opaque_prf_input, sol);
549 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
550 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
551 { const unsigned char cryptopro_ext[36] = {
552 0xfd, 0xe8, /*65000*/
553 0x00, 0x20, /*32 bytes length*/
554 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
555 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
556 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
557 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
558 if (limit-ret<36) return NULL;
559 memcpy(ret,cryptopro_ext,36);
564 if ((extdatalen = ret-p-2)== 0)
571 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
576 unsigned char *data = *p;
577 s->servername_done = 0;
578 s->tlsext_status_type = -1;
584 if (data > (d+n-len))
587 while (data <= (d+n-4))
592 if (data+size > (d+n))
595 fprintf(stderr,"Received extension type %d size %d\n",type,size);
597 if (s->tlsext_debug_cb)
598 s->tlsext_debug_cb(s, 0, type, data, size,
599 s->tlsext_debug_arg);
600 /* The servername extension is treated as follows:
602 - Only the hostname type is supported with a maximum length of 255.
603 - The servername is rejected if too long or if it contains zeros,
604 in which case an fatal alert is generated.
605 - The servername field is maintained together with the session cache.
606 - When a session is resumed, the servername call back invoked in order
607 to allow the application to position itself to the right context.
608 - The servername is acknowledged if it is new for a session or when
609 it is identical to a previously used for the same session.
610 Applications can control the behaviour. They can at any time
611 set a 'desirable' servername for a new SSL object. This can be the
612 case for example with HTTPS when a Host: header field is received and
613 a renegotiation is requested. In this case, a possible servername
614 presented in the new client hello is only acknowledged if it matches
615 the value of the Host: field.
616 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
617 if they provide for changing an explicit servername context for the session,
618 i.e. when the session has been established with a servername extension.
619 - On session reconnect, the servername extension may be absent.
623 if (type == TLSEXT_TYPE_server_name)
625 unsigned char *sdata;
631 *al = SSL_AD_DECODE_ERROR;
638 *al = SSL_AD_DECODE_ERROR;
645 servname_type = *(sdata++);
651 *al = SSL_AD_DECODE_ERROR;
654 if (s->servername_done == 0)
655 switch (servname_type)
657 case TLSEXT_NAMETYPE_host_name:
658 if (s->session->tlsext_hostname == NULL)
660 if (len > TLSEXT_MAXLEN_host_name ||
661 ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL))
663 *al = TLS1_AD_UNRECOGNIZED_NAME;
666 memcpy(s->session->tlsext_hostname, sdata, len);
667 s->session->tlsext_hostname[len]='\0';
668 if (strlen(s->session->tlsext_hostname) != len) {
669 OPENSSL_free(s->session->tlsext_hostname);
670 s->session->tlsext_hostname = NULL;
671 *al = TLS1_AD_UNRECOGNIZED_NAME;
674 s->servername_done = 1;
678 s->servername_done = strlen(s->session->tlsext_hostname) == len
679 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
691 *al = SSL_AD_DECODE_ERROR;
697 #ifndef OPENSSL_NO_EC
698 else if (type == TLSEXT_TYPE_ec_point_formats)
700 unsigned char *sdata = data;
701 int ecpointformatlist_length = *(sdata++);
703 if (ecpointformatlist_length != size - 1)
705 *al = TLS1_AD_DECODE_ERROR;
708 s->session->tlsext_ecpointformatlist_length = 0;
709 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
710 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
712 *al = TLS1_AD_INTERNAL_ERROR;
715 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
716 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
718 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
719 sdata = s->session->tlsext_ecpointformatlist;
720 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
721 fprintf(stderr,"%i ",*(sdata++));
722 fprintf(stderr,"\n");
725 else if (type == TLSEXT_TYPE_elliptic_curves)
727 unsigned char *sdata = data;
728 int ellipticcurvelist_length = (*(sdata++) << 8);
729 ellipticcurvelist_length += (*(sdata++));
731 if (ellipticcurvelist_length != size - 2)
733 *al = TLS1_AD_DECODE_ERROR;
736 s->session->tlsext_ellipticcurvelist_length = 0;
737 if (s->session->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->session->tlsext_ellipticcurvelist);
738 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
740 *al = TLS1_AD_INTERNAL_ERROR;
743 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
744 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
746 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
747 sdata = s->session->tlsext_ellipticcurvelist;
748 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
749 fprintf(stderr,"%i ",*(sdata++));
750 fprintf(stderr,"\n");
753 #endif /* OPENSSL_NO_EC */
754 #ifdef TLSEXT_TYPE_opaque_prf_input
755 else if (type == TLSEXT_TYPE_opaque_prf_input)
757 unsigned char *sdata = data;
761 *al = SSL_AD_DECODE_ERROR;
764 n2s(sdata, s->s3->client_opaque_prf_input_len);
765 if (s->s3->client_opaque_prf_input_len != size - 2)
767 *al = SSL_AD_DECODE_ERROR;
771 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
772 OPENSSL_free(s->s3->client_opaque_prf_input);
773 if (s->s3->client_opaque_prf_input_len == 0)
774 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
776 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
777 if (s->s3->client_opaque_prf_input == NULL)
779 *al = TLS1_AD_INTERNAL_ERROR;
784 else if (type == TLSEXT_TYPE_session_ticket)
786 if (s->tls_session_ticket_ext_cb &&
787 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
789 *al = TLS1_AD_INTERNAL_ERROR;
793 else if (type == TLSEXT_TYPE_status_request
794 && s->ctx->tlsext_status_cb)
799 *al = SSL_AD_DECODE_ERROR;
803 s->tlsext_status_type = *data++;
805 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
807 const unsigned char *sdata;
809 /* Read in responder_id_list */
814 *al = SSL_AD_DECODE_ERROR;
823 *al = SSL_AD_DECODE_ERROR;
830 *al = SSL_AD_DECODE_ERROR;
835 id = d2i_OCSP_RESPID(NULL,
839 *al = SSL_AD_DECODE_ERROR;
844 OCSP_RESPID_free(id);
845 *al = SSL_AD_DECODE_ERROR;
848 if (!s->tlsext_ocsp_ids
849 && !(s->tlsext_ocsp_ids =
850 sk_OCSP_RESPID_new_null()))
852 OCSP_RESPID_free(id);
853 *al = SSL_AD_INTERNAL_ERROR;
856 if (!sk_OCSP_RESPID_push(
857 s->tlsext_ocsp_ids, id))
859 OCSP_RESPID_free(id);
860 *al = SSL_AD_INTERNAL_ERROR;
865 /* Read in request_extensions */
870 *al = SSL_AD_DECODE_ERROR;
876 s->tlsext_ocsp_exts =
877 d2i_X509_EXTENSIONS(NULL,
879 if (!s->tlsext_ocsp_exts
880 || (data + dsize != sdata))
882 *al = SSL_AD_DECODE_ERROR;
887 /* We don't know what to do with any other type
891 s->tlsext_status_type = -1;
894 /* session ticket processed earlier */
902 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
907 unsigned char *data = *p;
909 int tlsext_servername = 0;
916 while(data <= (d+n-4))
921 if (data+size > (d+n))
924 if (s->tlsext_debug_cb)
925 s->tlsext_debug_cb(s, 1, type, data, size,
926 s->tlsext_debug_arg);
928 if (type == TLSEXT_TYPE_server_name)
930 if (s->tlsext_hostname == NULL || size > 0)
932 *al = TLS1_AD_UNRECOGNIZED_NAME;
935 tlsext_servername = 1;
938 #ifndef OPENSSL_NO_EC
939 else if (type == TLSEXT_TYPE_ec_point_formats)
941 unsigned char *sdata = data;
942 int ecpointformatlist_length = *(sdata++);
944 if (ecpointformatlist_length != size - 1)
946 *al = TLS1_AD_DECODE_ERROR;
949 s->session->tlsext_ecpointformatlist_length = 0;
950 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
951 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
953 *al = TLS1_AD_INTERNAL_ERROR;
956 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
957 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
959 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
960 sdata = s->session->tlsext_ecpointformatlist;
961 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
962 fprintf(stderr,"%i ",*(sdata++));
963 fprintf(stderr,"\n");
966 #endif /* OPENSSL_NO_EC */
968 else if (type == TLSEXT_TYPE_session_ticket)
970 if (s->tls_session_ticket_ext_cb &&
971 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
973 *al = TLS1_AD_INTERNAL_ERROR;
976 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
979 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
982 s->tlsext_ticket_expected = 1;
984 #ifdef TLSEXT_TYPE_opaque_prf_input
985 else if (type == TLSEXT_TYPE_opaque_prf_input)
987 unsigned char *sdata = data;
991 *al = SSL_AD_DECODE_ERROR;
994 n2s(sdata, s->s3->server_opaque_prf_input_len);
995 if (s->s3->server_opaque_prf_input_len != size - 2)
997 *al = SSL_AD_DECODE_ERROR;
1001 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1002 OPENSSL_free(s->s3->server_opaque_prf_input);
1003 if (s->s3->server_opaque_prf_input_len == 0)
1004 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1006 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1008 if (s->s3->server_opaque_prf_input == NULL)
1010 *al = TLS1_AD_INTERNAL_ERROR;
1015 else if (type == TLSEXT_TYPE_status_request)
1017 /* MUST be empty and only sent if we've requested
1018 * a status request message.
1020 if ((s->tlsext_status_type == -1) || (size > 0))
1022 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1025 /* Set flag to expect CertificateStatus message */
1026 s->tlsext_status_expected = 1;
1034 *al = SSL_AD_DECODE_ERROR;
1038 if (!s->hit && tlsext_servername == 1)
1040 if (s->tlsext_hostname)
1042 if (s->session->tlsext_hostname == NULL)
1044 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1045 if (!s->session->tlsext_hostname)
1047 *al = SSL_AD_UNRECOGNIZED_NAME;
1053 *al = SSL_AD_DECODE_ERROR;
1064 int ssl_prepare_clienthello_tlsext(SSL *s)
1066 #ifndef OPENSSL_NO_EC
1067 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1068 * and elliptic curves we support.
1073 unsigned long alg_k, alg_a;
1074 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1076 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1078 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1080 alg_k = c->algorithm_mkey;
1081 alg_a = c->algorithm_auth;
1082 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1088 using_ecc = using_ecc && (s->version == TLS1_VERSION);
1091 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1092 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1094 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1097 s->tlsext_ecpointformatlist_length = 3;
1098 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1099 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1100 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1102 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1103 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1104 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1105 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1107 s->tlsext_ellipticcurvelist_length = 0;
1108 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1111 for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <=
1112 sizeof(nid_list)/sizeof(nid_list[0]); i++)
1115 #endif /* OPENSSL_NO_EC */
1117 #ifdef TLSEXT_TYPE_opaque_prf_input
1121 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1123 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1128 if (s->tlsext_opaque_prf_input != NULL)
1130 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1131 OPENSSL_free(s->s3->client_opaque_prf_input);
1133 if (s->tlsext_opaque_prf_input_len == 0)
1134 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1136 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1137 if (s->s3->client_opaque_prf_input == NULL)
1139 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1142 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1146 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1147 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1154 int ssl_prepare_serverhello_tlsext(SSL *s)
1156 #ifndef OPENSSL_NO_EC
1157 /* If we are server and using an ECC cipher suite, send the point formats we support
1158 * if the client sent us an ECPointsFormat extension. Note that the server is not
1159 * supposed to send an EllipticCurves extension.
1162 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1163 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1164 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1165 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1169 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1170 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1172 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1175 s->tlsext_ecpointformatlist_length = 3;
1176 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1177 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1178 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1180 #endif /* OPENSSL_NO_EC */
1185 int ssl_check_clienthello_tlsext(SSL *s)
1187 int ret=SSL_TLSEXT_ERR_NOACK;
1188 int al = SSL_AD_UNRECOGNIZED_NAME;
1190 #ifndef OPENSSL_NO_EC
1191 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1192 * ssl3_choose_cipher in s3_lib.c.
1194 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1195 * ssl3_choose_cipher in s3_lib.c.
1199 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1200 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1201 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1202 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1204 /* If status request then ask callback what to do.
1205 * Note: this must be called after servername callbacks in case
1206 * the certificate has changed.
1208 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1211 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1214 /* We don't want to send a status request response */
1215 case SSL_TLSEXT_ERR_NOACK:
1216 s->tlsext_status_expected = 0;
1218 /* status request response should be sent */
1219 case SSL_TLSEXT_ERR_OK:
1220 if (s->tlsext_ocsp_resp)
1221 s->tlsext_status_expected = 1;
1223 s->tlsext_status_expected = 0;
1225 /* something bad happened */
1226 case SSL_TLSEXT_ERR_ALERT_FATAL:
1227 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1228 al = SSL_AD_INTERNAL_ERROR;
1233 s->tlsext_status_expected = 0;
1235 #ifdef TLSEXT_TYPE_opaque_prf_input
1237 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1238 * but we might be sending an alert in response to the client hello,
1239 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1243 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1245 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1248 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1249 al = SSL_AD_INTERNAL_ERROR;
1254 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1255 OPENSSL_free(s->s3->server_opaque_prf_input);
1256 s->s3->server_opaque_prf_input = NULL;
1258 if (s->tlsext_opaque_prf_input != NULL)
1260 if (s->s3->client_opaque_prf_input != NULL &&
1261 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1263 /* can only use this extension if we have a server opaque PRF input
1264 * of the same length as the client opaque PRF input! */
1266 if (s->tlsext_opaque_prf_input_len == 0)
1267 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1269 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1270 if (s->s3->server_opaque_prf_input == NULL)
1272 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1273 al = SSL_AD_INTERNAL_ERROR;
1276 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1280 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1282 /* The callback wants to enforce use of the extension,
1283 * but we can't do that with the client opaque PRF input;
1284 * abort the handshake.
1286 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1287 al = SSL_AD_HANDSHAKE_FAILURE;
1295 case SSL_TLSEXT_ERR_ALERT_FATAL:
1296 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1299 case SSL_TLSEXT_ERR_ALERT_WARNING:
1300 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1303 case SSL_TLSEXT_ERR_NOACK:
1304 s->servername_done=0;
1310 int ssl_check_serverhello_tlsext(SSL *s)
1312 int ret=SSL_TLSEXT_ERR_NOACK;
1313 int al = SSL_AD_UNRECOGNIZED_NAME;
1315 #ifndef OPENSSL_NO_EC
1316 /* If we are client and using an elliptic curve cryptography cipher suite, then server
1317 * must return a an EC point formats lists containing uncompressed.
1319 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1320 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1321 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1322 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1324 /* we are using an ECC cipher */
1326 unsigned char *list;
1327 int found_uncompressed = 0;
1328 if ((s->session->tlsext_ecpointformatlist == NULL) || (s->session->tlsext_ecpointformatlist_length == 0))
1330 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1333 list = s->session->tlsext_ecpointformatlist;
1334 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1336 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1338 found_uncompressed = 1;
1342 if (!found_uncompressed)
1344 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1348 ret = SSL_TLSEXT_ERR_OK;
1349 #endif /* OPENSSL_NO_EC */
1351 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1352 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1353 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1354 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1356 #ifdef TLSEXT_TYPE_opaque_prf_input
1357 if (s->s3->server_opaque_prf_input_len > 0)
1359 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1360 * So first verify that we really have a value from the server too. */
1362 if (s->s3->server_opaque_prf_input == NULL)
1364 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1365 al = SSL_AD_HANDSHAKE_FAILURE;
1368 /* Anytime the server *has* sent an opaque PRF input, we need to check
1369 * that we have a client opaque PRF input of the same size. */
1370 if (s->s3->client_opaque_prf_input == NULL ||
1371 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1373 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1374 al = SSL_AD_ILLEGAL_PARAMETER;
1379 /* If we've requested certificate status and we wont get one
1382 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1383 && s->ctx && s->ctx->tlsext_status_cb)
1386 /* Set resp to NULL, resplen to -1 so callback knows
1387 * there is no response.
1389 if (s->tlsext_ocsp_resp)
1391 OPENSSL_free(s->tlsext_ocsp_resp);
1392 s->tlsext_ocsp_resp = NULL;
1394 s->tlsext_ocsp_resplen = -1;
1395 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1398 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1399 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1403 al = SSL_AD_INTERNAL_ERROR;
1404 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1410 case SSL_TLSEXT_ERR_ALERT_FATAL:
1411 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1414 case SSL_TLSEXT_ERR_ALERT_WARNING:
1415 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1418 case SSL_TLSEXT_ERR_NOACK:
1419 s->servername_done=0;
1425 /* Since the server cache lookup is done early on in the processing of client
1426 * hello and other operations depend on the result we need to handle any TLS
1427 * session ticket extension at the same time.
1430 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1431 const unsigned char *limit, SSL_SESSION **ret)
1433 /* Point after session ID in client hello */
1434 const unsigned char *p = session_id + len;
1437 /* If tickets disabled behave as if no ticket present
1438 * to permit stateful resumption.
1440 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1443 if ((s->version <= SSL3_VERSION) || !limit)
1447 /* Skip past cipher list */
1452 /* Skip past compression algorithm list */
1457 /* Now at start of extensions */
1458 if ((p + 2) >= limit)
1461 while ((p + 4) <= limit)
1463 unsigned short type, size;
1466 if (p + size > limit)
1468 if (type == TLSEXT_TYPE_session_ticket)
1470 /* If tickets disabled indicate cache miss which will
1471 * trigger a full handshake
1473 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1475 /* If zero length note client will accept a ticket
1476 * and indicate cache miss to trigger full handshake
1480 s->tlsext_ticket_expected = 1;
1481 return 0; /* Cache miss */
1483 if (s->tls_session_secret_cb)
1485 /* Indicate cache miss here and instead of
1486 * generating the session from ticket now,
1487 * trigger abbreviated handshake based on
1488 * external mechanism to calculate the master
1492 return tls_decrypt_ticket(s, p, size, session_id, len,
1500 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1501 const unsigned char *sess_id, int sesslen,
1502 SSL_SESSION **psess)
1505 unsigned char *sdec;
1506 const unsigned char *p;
1507 int slen, mlen, renew_ticket = 0;
1508 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1511 /* Need at least keyname + iv + some encrypted data */
1514 /* Initialize session ticket encryption and HMAC contexts */
1515 HMAC_CTX_init(&hctx);
1516 EVP_CIPHER_CTX_init(&ctx);
1517 if (s->ctx->tlsext_ticket_key_cb)
1519 unsigned char *nctick = (unsigned char *)etick;
1520 int rv = s->ctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
1531 /* Check key name matches */
1532 if (memcmp(etick, s->ctx->tlsext_tick_key_name, 16))
1534 HMAC_Init_ex(&hctx, s->ctx->tlsext_tick_hmac_key, 16,
1535 tlsext_tick_md(), NULL);
1536 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1537 s->ctx->tlsext_tick_aes_key, etick + 16);
1539 /* Attempt to process session ticket, first conduct sanity and
1540 * integrity checks on ticket.
1542 mlen = HMAC_size(&hctx);
1545 EVP_CIPHER_CTX_cleanup(&ctx);
1549 /* Check HMAC of encrypted ticket */
1550 HMAC_Update(&hctx, etick, eticklen);
1551 HMAC_Final(&hctx, tick_hmac, NULL);
1552 HMAC_CTX_cleanup(&hctx);
1553 if (memcmp(tick_hmac, etick + eticklen, mlen))
1555 /* Attempt to decrypt session data */
1556 /* Move p after IV to start of encrypted ticket, update length */
1557 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1558 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1559 sdec = OPENSSL_malloc(eticklen);
1562 EVP_CIPHER_CTX_cleanup(&ctx);
1565 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1566 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1569 EVP_CIPHER_CTX_cleanup(&ctx);
1572 sess = d2i_SSL_SESSION(NULL, &p, slen);
1576 /* The session ID if non-empty is used by some clients to
1577 * detect that the ticket has been accepted. So we copy it to
1578 * the session structure. If it is empty set length to zero
1579 * as required by standard.
1582 memcpy(sess->session_id, sess_id, sesslen);
1583 sess->session_id_length = sesslen;
1585 s->tlsext_ticket_expected = renew_ticket;
1588 /* If session decrypt failure indicate a cache miss and set state to
1592 s->tlsext_ticket_expected = 1;