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)
160 void tls1_clear(SSL *s)
163 s->version=TLS1_VERSION;
166 #ifndef OPENSSL_NO_EC
167 static int nid_list[] =
169 NID_sect163k1, /* sect163k1 (1) */
170 NID_sect163r1, /* sect163r1 (2) */
171 NID_sect163r2, /* sect163r2 (3) */
172 NID_sect193r1, /* sect193r1 (4) */
173 NID_sect193r2, /* sect193r2 (5) */
174 NID_sect233k1, /* sect233k1 (6) */
175 NID_sect233r1, /* sect233r1 (7) */
176 NID_sect239k1, /* sect239k1 (8) */
177 NID_sect283k1, /* sect283k1 (9) */
178 NID_sect283r1, /* sect283r1 (10) */
179 NID_sect409k1, /* sect409k1 (11) */
180 NID_sect409r1, /* sect409r1 (12) */
181 NID_sect571k1, /* sect571k1 (13) */
182 NID_sect571r1, /* sect571r1 (14) */
183 NID_secp160k1, /* secp160k1 (15) */
184 NID_secp160r1, /* secp160r1 (16) */
185 NID_secp160r2, /* secp160r2 (17) */
186 NID_secp192k1, /* secp192k1 (18) */
187 NID_X9_62_prime192v1, /* secp192r1 (19) */
188 NID_secp224k1, /* secp224k1 (20) */
189 NID_secp224r1, /* secp224r1 (21) */
190 NID_secp256k1, /* secp256k1 (22) */
191 NID_X9_62_prime256v1, /* secp256r1 (23) */
192 NID_secp384r1, /* secp384r1 (24) */
193 NID_secp521r1 /* secp521r1 (25) */
196 int tls1_ec_curve_id2nid(int curve_id)
198 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
199 if ((curve_id < 1) || (curve_id > sizeof(nid_list)/sizeof(nid_list[0]))) return 0;
200 return nid_list[curve_id-1];
203 int tls1_ec_nid2curve_id(int nid)
205 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
208 case NID_sect163k1: /* sect163k1 (1) */
210 case NID_sect163r1: /* sect163r1 (2) */
212 case NID_sect163r2: /* sect163r2 (3) */
214 case NID_sect193r1: /* sect193r1 (4) */
216 case NID_sect193r2: /* sect193r2 (5) */
218 case NID_sect233k1: /* sect233k1 (6) */
220 case NID_sect233r1: /* sect233r1 (7) */
222 case NID_sect239k1: /* sect239k1 (8) */
224 case NID_sect283k1: /* sect283k1 (9) */
226 case NID_sect283r1: /* sect283r1 (10) */
228 case NID_sect409k1: /* sect409k1 (11) */
230 case NID_sect409r1: /* sect409r1 (12) */
232 case NID_sect571k1: /* sect571k1 (13) */
234 case NID_sect571r1: /* sect571r1 (14) */
236 case NID_secp160k1: /* secp160k1 (15) */
238 case NID_secp160r1: /* secp160r1 (16) */
240 case NID_secp160r2: /* secp160r2 (17) */
242 case NID_secp192k1: /* secp192k1 (18) */
244 case NID_X9_62_prime192v1: /* secp192r1 (19) */
246 case NID_secp224k1: /* secp224k1 (20) */
248 case NID_secp224r1: /* secp224r1 (21) */
250 case NID_secp256k1: /* secp256k1 (22) */
252 case NID_X9_62_prime256v1: /* secp256r1 (23) */
254 case NID_secp384r1: /* secp384r1 (24) */
256 case NID_secp521r1: /* secp521r1 (25) */
262 #endif /* OPENSSL_NO_EC */
264 #ifndef OPENSSL_NO_TLSEXT
265 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
268 unsigned char *ret = p;
272 if (ret>=limit) return NULL; /* this really never occurs, but ... */
274 if (s->tlsext_hostname != NULL)
276 /* Add TLS extension servername to the Client Hello message */
277 unsigned long size_str;
280 /* check for enough space.
281 4 for the servername type and entension length
282 2 for servernamelist length
283 1 for the hostname type
284 2 for hostname length
288 if ((lenmax = limit - ret - 9) < 0
289 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
292 /* extension type and length */
293 s2n(TLSEXT_TYPE_server_name,ret);
296 /* length of servername list */
299 /* hostname type, length and hostname */
300 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
302 memcpy(ret, s->tlsext_hostname, size_str);
306 #ifndef OPENSSL_NO_EC
307 if (s->tlsext_ecpointformatlist != NULL)
309 /* Add TLS extension ECPointFormats to the ClientHello message */
312 if ((lenmax = limit - ret - 5) < 0) return NULL;
313 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
314 if (s->tlsext_ecpointformatlist_length > 255)
316 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
320 s2n(TLSEXT_TYPE_ec_point_formats,ret);
321 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
322 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
323 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
324 ret+=s->tlsext_ecpointformatlist_length;
326 if (s->tlsext_ellipticcurvelist != NULL)
328 /* Add TLS extension EllipticCurves to the ClientHello message */
331 if ((lenmax = limit - ret - 6) < 0) return NULL;
332 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
333 if (s->tlsext_ellipticcurvelist_length > 65532)
335 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
339 s2n(TLSEXT_TYPE_elliptic_curves,ret);
340 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
342 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
343 * elliptic_curve_list, but the examples use two bytes.
344 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
345 * resolves this to two bytes.
347 s2n(s->tlsext_ellipticcurvelist_length, ret);
348 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
349 ret+=s->tlsext_ellipticcurvelist_length;
351 #endif /* OPENSSL_NO_EC */
353 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
356 if (s->session && s->session->tlsext_tick)
357 ticklen = s->session->tlsext_ticklen;
360 /* Check for enough room 2 for extension type, 2 for len
363 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
364 s2n(TLSEXT_TYPE_session_ticket,ret);
368 memcpy(ret, s->session->tlsext_tick, ticklen);
373 #ifdef TLSEXT_TYPE_opaque_prf_input
374 if (s->s3->client_opaque_prf_input != NULL)
376 size_t col = s->s3->client_opaque_prf_input_len;
378 if ((long)(limit - ret - 6 - col < 0))
380 if (col > 0xFFFD) /* can't happen */
383 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
386 memcpy(ret, s->s3->client_opaque_prf_input, col);
391 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
394 long extlen, idlen, itmp;
398 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
400 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
401 itmp = i2d_OCSP_RESPID(id, NULL);
407 if (s->tlsext_ocsp_exts)
409 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
416 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
417 s2n(TLSEXT_TYPE_status_request, ret);
418 if (extlen + idlen > 0xFFF0)
420 s2n(extlen + idlen + 5, ret);
421 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
423 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
425 /* save position of id len */
426 unsigned char *q = ret;
427 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
428 /* skip over id len */
430 itmp = i2d_OCSP_RESPID(id, &ret);
436 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
439 if ((extdatalen = ret-p-2)== 0)
446 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
449 unsigned char *ret = p;
452 if (ret>=limit) return NULL; /* this really never occurs, but ... */
454 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
456 if ((long)(limit - ret - 4) < 0) return NULL;
458 s2n(TLSEXT_TYPE_server_name,ret);
461 #ifndef OPENSSL_NO_EC
462 if (s->tlsext_ecpointformatlist != NULL)
464 /* Add TLS extension ECPointFormats to the ServerHello message */
467 if ((lenmax = limit - ret - 5) < 0) return NULL;
468 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
469 if (s->tlsext_ecpointformatlist_length > 255)
471 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
475 s2n(TLSEXT_TYPE_ec_point_formats,ret);
476 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
477 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
478 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
479 ret+=s->tlsext_ecpointformatlist_length;
482 /* Currently the server should not respond with a SupportedCurves extension */
483 #endif /* OPENSSL_NO_EC */
485 if (s->tlsext_ticket_expected
486 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
488 if ((long)(limit - ret - 4) < 0) return NULL;
489 s2n(TLSEXT_TYPE_session_ticket,ret);
493 if (s->tlsext_status_expected)
495 if ((long)(limit - ret - 4) < 0) return NULL;
496 s2n(TLSEXT_TYPE_status_request,ret);
500 #ifdef TLSEXT_TYPE_opaque_prf_input
501 if (s->s3->server_opaque_prf_input != NULL)
503 size_t sol = s->s3->server_opaque_prf_input_len;
505 if ((long)(limit - ret - 6 - sol) < 0)
507 if (sol > 0xFFFD) /* can't happen */
510 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
513 memcpy(ret, s->s3->server_opaque_prf_input, sol);
518 if ((extdatalen = ret-p-2)== 0)
525 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
530 unsigned char *data = *p;
531 s->servername_done = 0;
532 s->tlsext_status_type = -1;
538 if (data > (d+n-len))
541 while (data <= (d+n-4))
546 if (data+size > (d+n))
549 if (s->tlsext_debug_cb)
550 s->tlsext_debug_cb(s, 0, type, data, size,
551 s->tlsext_debug_arg);
552 /* The servername extension is treated as follows:
554 - Only the hostname type is supported with a maximum length of 255.
555 - The servername is rejected if too long or if it contains zeros,
556 in which case an fatal alert is generated.
557 - The servername field is maintained together with the session cache.
558 - When a session is resumed, the servername call back invoked in order
559 to allow the application to position itself to the right context.
560 - The servername is acknowledged if it is new for a session or when
561 it is identical to a previously used for the same session.
562 Applications can control the behaviour. They can at any time
563 set a 'desirable' servername for a new SSL object. This can be the
564 case for example with HTTPS when a Host: header field is received and
565 a renegotiation is requested. In this case, a possible servername
566 presented in the new client hello is only acknowledged if it matches
567 the value of the Host: field.
568 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
569 if they provide for changing an explicit servername context for the session,
570 i.e. when the session has been established with a servername extension.
571 - On session reconnect, the servername extension may be absent.
575 if (type == TLSEXT_TYPE_server_name)
577 unsigned char *sdata;
583 *al = SSL_AD_DECODE_ERROR;
590 *al = SSL_AD_DECODE_ERROR;
597 servname_type = *(sdata++);
603 *al = SSL_AD_DECODE_ERROR;
606 if (s->servername_done == 0)
607 switch (servname_type)
609 case TLSEXT_NAMETYPE_host_name:
610 if (s->session->tlsext_hostname == NULL)
612 if (len > TLSEXT_MAXLEN_host_name ||
613 ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL))
615 *al = TLS1_AD_UNRECOGNIZED_NAME;
618 memcpy(s->session->tlsext_hostname, sdata, len);
619 s->session->tlsext_hostname[len]='\0';
620 if (strlen(s->session->tlsext_hostname) != len) {
621 OPENSSL_free(s->session->tlsext_hostname);
622 *al = TLS1_AD_UNRECOGNIZED_NAME;
625 s->servername_done = 1;
629 s->servername_done = strlen(s->session->tlsext_hostname) == len
630 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
642 *al = SSL_AD_DECODE_ERROR;
648 #ifndef OPENSSL_NO_EC
649 else if (type == TLSEXT_TYPE_ec_point_formats)
651 unsigned char *sdata = data;
652 int ecpointformatlist_length = *(sdata++);
654 if (ecpointformatlist_length != size - 1)
656 *al = TLS1_AD_DECODE_ERROR;
659 s->session->tlsext_ecpointformatlist_length = 0;
660 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
661 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
663 *al = TLS1_AD_INTERNAL_ERROR;
666 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
667 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
669 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
670 sdata = s->session->tlsext_ecpointformatlist;
671 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
672 fprintf(stderr,"%i ",*(sdata++));
673 fprintf(stderr,"\n");
676 else if (type == TLSEXT_TYPE_elliptic_curves)
678 unsigned char *sdata = data;
679 int ellipticcurvelist_length = (*(sdata++) << 8);
680 ellipticcurvelist_length += (*(sdata++));
682 if (ellipticcurvelist_length != size - 2)
684 *al = TLS1_AD_DECODE_ERROR;
687 s->session->tlsext_ellipticcurvelist_length = 0;
688 if (s->session->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->session->tlsext_ellipticcurvelist);
689 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
691 *al = TLS1_AD_INTERNAL_ERROR;
694 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
695 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
697 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
698 sdata = s->session->tlsext_ellipticcurvelist;
699 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
700 fprintf(stderr,"%i ",*(sdata++));
701 fprintf(stderr,"\n");
704 #endif /* OPENSSL_NO_EC */
705 #ifdef TLSEXT_TYPE_opaque_prf_input
706 else if (type == TLSEXT_TYPE_opaque_prf_input)
708 unsigned char *sdata = data;
712 *al = SSL_AD_DECODE_ERROR;
715 n2s(sdata, s->s3->client_opaque_prf_input_len);
716 if (s->s3->client_opaque_prf_input_len != size - 2)
718 *al = SSL_AD_DECODE_ERROR;
722 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
723 OPENSSL_free(s->s3->client_opaque_prf_input);
724 if (s->s3->client_opaque_prf_input_len == 0)
725 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
727 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
728 if (s->s3->client_opaque_prf_input == NULL)
730 *al = TLS1_AD_INTERNAL_ERROR;
735 else if (type == TLSEXT_TYPE_status_request
736 && s->ctx->tlsext_status_cb)
741 *al = SSL_AD_DECODE_ERROR;
745 s->tlsext_status_type = *data++;
747 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
749 const unsigned char *sdata;
751 /* Read in responder_id_list */
756 *al = SSL_AD_DECODE_ERROR;
765 *al = SSL_AD_DECODE_ERROR;
772 *al = SSL_AD_DECODE_ERROR;
777 id = d2i_OCSP_RESPID(NULL,
781 *al = SSL_AD_DECODE_ERROR;
786 OCSP_RESPID_free(id);
787 *al = SSL_AD_DECODE_ERROR;
790 if (!s->tlsext_ocsp_ids
791 && !(s->tlsext_ocsp_ids =
792 sk_OCSP_RESPID_new_null()))
794 OCSP_RESPID_free(id);
795 *al = SSL_AD_INTERNAL_ERROR;
798 if (!sk_OCSP_RESPID_push(
799 s->tlsext_ocsp_ids, id))
801 OCSP_RESPID_free(id);
802 *al = SSL_AD_INTERNAL_ERROR;
807 /* Read in request_extensions */
812 *al = SSL_AD_DECODE_ERROR;
818 s->tlsext_ocsp_exts =
819 d2i_X509_EXTENSIONS(NULL,
821 if (!s->tlsext_ocsp_exts
822 || (data + dsize != sdata))
824 *al = SSL_AD_DECODE_ERROR;
829 /* We don't know what to do with any other type
833 s->tlsext_status_type = -1;
836 /* session ticket processed earlier */
844 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
849 unsigned char *data = *p;
851 int tlsext_servername = 0;
858 while(data <= (d+n-4))
863 if (data+size > (d+n))
866 if (s->tlsext_debug_cb)
867 s->tlsext_debug_cb(s, 1, type, data, size,
868 s->tlsext_debug_arg);
870 if (type == TLSEXT_TYPE_server_name)
872 if (s->tlsext_hostname == NULL || size > 0)
874 *al = TLS1_AD_UNRECOGNIZED_NAME;
877 tlsext_servername = 1;
880 #ifndef OPENSSL_NO_EC
881 else if (type == TLSEXT_TYPE_ec_point_formats)
883 unsigned char *sdata = data;
884 int ecpointformatlist_length = *(sdata++);
886 if (ecpointformatlist_length != size - 1)
888 *al = TLS1_AD_DECODE_ERROR;
891 s->session->tlsext_ecpointformatlist_length = 0;
892 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
893 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
895 *al = TLS1_AD_INTERNAL_ERROR;
898 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
899 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
901 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
902 sdata = s->session->tlsext_ecpointformatlist;
903 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
904 fprintf(stderr,"%i ",*(sdata++));
905 fprintf(stderr,"\n");
908 #endif /* OPENSSL_NO_EC */
910 else if (type == TLSEXT_TYPE_session_ticket)
912 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
915 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
918 s->tlsext_ticket_expected = 1;
920 #ifdef TLSEXT_TYPE_opaque_prf_input
921 else if (type == TLSEXT_TYPE_opaque_prf_input)
923 unsigned char *sdata = data;
927 *al = SSL_AD_DECODE_ERROR;
930 n2s(sdata, s->s3->server_opaque_prf_input_len);
931 if (s->s3->server_opaque_prf_input_len != size - 2)
933 *al = SSL_AD_DECODE_ERROR;
937 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
938 OPENSSL_free(s->s3->server_opaque_prf_input);
939 if (s->s3->server_opaque_prf_input_len == 0)
940 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
942 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
944 if (s->s3->server_opaque_prf_input == NULL)
946 *al = TLS1_AD_INTERNAL_ERROR;
951 else if (type == TLSEXT_TYPE_status_request)
953 /* MUST be empty and only sent if we've requested
954 * a status request message.
956 if ((s->tlsext_status_type == -1) || (size > 0))
958 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
961 /* Set flag to expect CertificateStatus message */
962 s->tlsext_status_expected = 1;
970 *al = SSL_AD_DECODE_ERROR;
974 if (!s->hit && tlsext_servername == 1)
976 if (s->tlsext_hostname)
978 if (s->session->tlsext_hostname == NULL)
980 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
981 if (!s->session->tlsext_hostname)
983 *al = SSL_AD_UNRECOGNIZED_NAME;
989 *al = SSL_AD_DECODE_ERROR;
995 /* If we've requested certificate status and we wont get one
998 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
999 && s->ctx->tlsext_status_cb)
1002 /* Set resp to NULL, resplen to -1 so callback knows
1003 * there is no response.
1005 if (s->tlsext_ocsp_resp)
1007 OPENSSL_free(s->tlsext_ocsp_resp);
1008 s->tlsext_ocsp_resp = NULL;
1010 s->tlsext_ocsp_resplen = -1;
1011 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1014 *al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1019 *al = SSL_AD_INTERNAL_ERROR;
1029 int ssl_prepare_clienthello_tlsext(SSL *s)
1031 #ifndef OPENSSL_NO_EC
1032 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1033 * and elliptic curves we support.
1038 unsigned long alg_k, alg_a;
1039 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1041 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1043 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1045 alg_k = c->algorithm_mkey;
1046 alg_a = c->algorithm_auth;
1047 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1053 using_ecc = using_ecc && (s->version == TLS1_VERSION);
1056 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1057 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1059 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1062 s->tlsext_ecpointformatlist_length = 3;
1063 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1064 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1065 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1067 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1068 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1069 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1070 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1072 s->tlsext_ellipticcurvelist_length = 0;
1073 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1076 for (i = 1, j = s->tlsext_ellipticcurvelist; i <= sizeof(nid_list)/sizeof(nid_list[0]); i++)
1079 #endif /* OPENSSL_NO_EC */
1081 #ifdef TLSEXT_TYPE_opaque_prf_input
1085 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1087 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1092 if (s->tlsext_opaque_prf_input != NULL)
1094 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1095 OPENSSL_free(s->s3->client_opaque_prf_input);
1097 if (s->tlsext_opaque_prf_input_len == 0)
1098 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1100 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1101 if (s->s3->client_opaque_prf_input == NULL)
1103 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1106 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1110 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1111 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1118 int ssl_prepare_serverhello_tlsext(SSL *s)
1120 #ifndef OPENSSL_NO_EC
1121 /* If we are server and using an ECC cipher suite, send the point formats we support
1122 * if the client sent us an ECPointsFormat extension. Note that the server is not
1123 * supposed to send an EllipticCurves extension.
1126 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1127 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1128 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1129 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1133 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1134 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1136 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1139 s->tlsext_ecpointformatlist_length = 3;
1140 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1141 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1142 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1144 #endif /* OPENSSL_NO_EC */
1149 int ssl_check_clienthello_tlsext(SSL *s)
1151 int ret=SSL_TLSEXT_ERR_NOACK;
1152 int al = SSL_AD_UNRECOGNIZED_NAME;
1154 #ifndef OPENSSL_NO_EC
1155 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1156 * ssl3_choose_cipher in s3_lib.c.
1158 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1159 * ssl3_choose_cipher in s3_lib.c.
1163 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1164 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1165 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1166 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1168 /* If status request then ask callback what to do.
1169 * Note: this must be called after servername callbacks in case
1170 * the certificate has changed.
1172 if ((s->tlsext_status_type != -1) && s->ctx->tlsext_status_cb)
1175 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1178 /* We don't want to send a status request response */
1179 case SSL_TLSEXT_ERR_NOACK:
1180 s->tlsext_status_expected = 0;
1182 /* status request response should be sent */
1183 case SSL_TLSEXT_ERR_OK:
1184 if (s->tlsext_ocsp_resp)
1185 s->tlsext_status_expected = 1;
1187 s->tlsext_status_expected = 0;
1189 /* something bad happened */
1190 case SSL_TLSEXT_ERR_ALERT_FATAL:
1191 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1192 al = SSL_AD_INTERNAL_ERROR;
1197 s->tlsext_status_expected = 0;
1199 #ifdef TLSEXT_TYPE_opaque_prf_input
1201 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1202 * but we might be sending an alert in response to the client hello,
1203 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1207 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1209 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1212 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1213 al = SSL_AD_INTERNAL_ERROR;
1218 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1219 OPENSSL_free(s->s3->server_opaque_prf_input);
1220 s->s3->server_opaque_prf_input = NULL;
1222 if (s->tlsext_opaque_prf_input != NULL)
1224 if (s->s3->client_opaque_prf_input != NULL &&
1225 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1227 /* can only use this extension if we have a server opaque PRF input
1228 * of the same length as the client opaque PRF input! */
1230 if (s->tlsext_opaque_prf_input_len == 0)
1231 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1233 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1234 if (s->s3->server_opaque_prf_input == NULL)
1236 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1237 al = SSL_AD_INTERNAL_ERROR;
1240 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1244 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1246 /* The callback wants to enforce use of the extension,
1247 * but we can't do that with the client opaque PRF input;
1248 * abort the handshake.
1250 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1251 al = SSL_AD_HANDSHAKE_FAILURE;
1259 case SSL_TLSEXT_ERR_ALERT_FATAL:
1260 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1263 case SSL_TLSEXT_ERR_ALERT_WARNING:
1264 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1267 case SSL_TLSEXT_ERR_NOACK:
1268 s->servername_done=0;
1274 int ssl_check_serverhello_tlsext(SSL *s)
1276 int ret=SSL_TLSEXT_ERR_NOACK;
1277 int al = SSL_AD_UNRECOGNIZED_NAME;
1279 #ifndef OPENSSL_NO_EC
1280 /* If we are client and using an elliptic curve cryptography cipher suite, then server
1281 * must return a an EC point formats lists containing uncompressed.
1283 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1284 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1285 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1286 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1288 /* we are using an ECC cipher */
1290 unsigned char *list;
1291 int found_uncompressed = 0;
1292 if ((s->session->tlsext_ecpointformatlist == NULL) || (s->session->tlsext_ecpointformatlist_length == 0))
1294 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1297 list = s->session->tlsext_ecpointformatlist;
1298 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1300 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1302 found_uncompressed = 1;
1306 if (!found_uncompressed)
1308 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1312 ret = SSL_TLSEXT_ERR_OK;
1313 #endif /* OPENSSL_NO_EC */
1315 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1316 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1317 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1318 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1320 #ifdef TLSEXT_TYPE_opaque_prf_input
1321 if (s->s3->server_opaque_prf_input_len > 0)
1323 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1324 * So first verify that we really have a value from the server too. */
1326 if (s->s3->server_opaque_prf_input == NULL)
1328 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1329 al = SSL_AD_HANDSHAKE_FAILURE;
1332 /* Anytime the server *has* sent an opaque PRF input, we need to check
1333 * that we have a client opaque PRF input of the same size. */
1334 if (s->s3->client_opaque_prf_input == NULL ||
1335 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1337 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1338 al = SSL_AD_ILLEGAL_PARAMETER;
1345 case SSL_TLSEXT_ERR_ALERT_FATAL:
1346 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1349 case SSL_TLSEXT_ERR_ALERT_WARNING:
1350 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1353 case SSL_TLSEXT_ERR_NOACK:
1354 s->servername_done=0;
1360 /* Since the server cache lookup is done early on in the processing of client
1361 * hello and other operations depend on the result we need to handle any TLS
1362 * session ticket extension at the same time.
1365 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1366 const unsigned char *limit, SSL_SESSION **ret)
1368 /* Point after session ID in client hello */
1369 const unsigned char *p = session_id + len;
1371 if ((s->version <= SSL3_VERSION) || !limit)
1375 /* Skip past cipher list */
1380 /* Skip past compression algorithm list */
1385 /* Now at start of extensions */
1386 if ((p + 2) >= limit)
1389 while ((p + 4) <= limit)
1391 unsigned short type, size;
1394 if (p + size > limit)
1396 if (type == TLSEXT_TYPE_session_ticket)
1398 /* If tickets disabled indicate cache miss which will
1399 * trigger a full handshake
1401 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1403 /* If zero length not client will accept a ticket
1404 * and indicate cache miss to trigger full handshake
1408 s->tlsext_ticket_expected = 1;
1409 return 0; /* Cache miss */
1411 return tls_decrypt_ticket(s, p, size, session_id, len,
1419 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1420 const unsigned char *sess_id, int sesslen,
1421 SSL_SESSION **psess)
1424 unsigned char *sdec;
1425 const unsigned char *p;
1427 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1430 /* Attempt to process session ticket, first conduct sanity and
1431 * integrity checks on ticket.
1433 mlen = EVP_MD_size(tlsext_tick_md());
1435 /* Need at least keyname + iv + some encrypted data */
1438 /* Check key name matches */
1439 if (memcmp(etick, s->ctx->tlsext_tick_key_name, 16))
1441 /* Check HMAC of encrypted ticket */
1442 HMAC_CTX_init(&hctx);
1443 HMAC_Init_ex(&hctx, s->ctx->tlsext_tick_hmac_key, 16,
1444 tlsext_tick_md(), NULL);
1445 HMAC_Update(&hctx, etick, eticklen);
1446 HMAC_Final(&hctx, tick_hmac, NULL);
1447 HMAC_CTX_cleanup(&hctx);
1448 if (memcmp(tick_hmac, etick + eticklen, mlen))
1450 /* Set p to start of IV */
1452 EVP_CIPHER_CTX_init(&ctx);
1453 /* Attempt to decrypt session data */
1454 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1455 s->ctx->tlsext_tick_aes_key, p);
1456 /* Move p after IV to start of encrypted ticket, update length */
1459 sdec = OPENSSL_malloc(eticklen);
1462 EVP_CIPHER_CTX_cleanup(&ctx);
1465 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1466 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1469 EVP_CIPHER_CTX_cleanup(&ctx);
1472 sess = d2i_SSL_SESSION(NULL, &p, slen);
1476 /* The session ID if non-empty is used by some clients to
1477 * detect that the ticket has been accepted. So we copy it to
1478 * the session structure. If it is empty set length to zero
1479 * as required by standard.
1482 memcpy(sess->session_id, sess_id, sesslen);
1483 sess->session_id_length = sesslen;
1487 /* If session decrypt failure indicate a cache miss and set state to
1491 s->tlsext_ticket_expected = 1;