2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
58 /* ====================================================================
59 * Copyright (c) 1998-2007 The OpenSSL Project. All rights reserved.
61 * Redistribution and use in source and binary forms, with or without
62 * modification, are permitted provided that the following conditions
65 * 1. Redistributions of source code must retain the above copyright
66 * notice, this list of conditions and the following disclaimer.
68 * 2. Redistributions in binary form must reproduce the above copyright
69 * notice, this list of conditions and the following disclaimer in
70 * the documentation and/or other materials provided with the
73 * 3. All advertising materials mentioning features or use of this
74 * software must display the following acknowledgment:
75 * "This product includes software developed by the OpenSSL Project
76 * for use in the OpenSSL Toolkit. (http://www.openssl.org/)"
78 * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to
79 * endorse or promote products derived from this software without
80 * prior written permission. For written permission, please contact
81 * openssl-core@openssl.org.
83 * 5. Products derived from this software may not be called "OpenSSL"
84 * nor may "OpenSSL" appear in their names without prior written
85 * permission of the OpenSSL Project.
87 * 6. Redistributions of any form whatsoever must retain the following
89 * "This product includes software developed by the OpenSSL Project
90 * for use in the OpenSSL Toolkit (http://www.openssl.org/)"
92 * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY
93 * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
94 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
95 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR
96 * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
97 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
98 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
99 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
100 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
101 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
102 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
103 * OF THE POSSIBILITY OF SUCH DAMAGE.
104 * ====================================================================
106 * This product includes cryptographic software written by Eric Young
107 * (eay@cryptsoft.com). This product includes software written by Tim
108 * Hudson (tjh@cryptsoft.com).
113 #include <openssl/objects.h>
114 #include <openssl/evp.h>
115 #include <openssl/hmac.h>
116 #include <openssl/ocsp.h>
117 #include "ssl_locl.h"
119 const char tls1_version_str[]="TLSv1" OPENSSL_VERSION_PTEXT;
121 #ifndef OPENSSL_NO_TLSEXT
122 static int tls_decrypt_ticket(SSL *s, const unsigned char *tick, int ticklen,
123 const unsigned char *sess_id, int sesslen,
124 SSL_SESSION **psess);
127 SSL3_ENC_METHOD TLSv1_enc_data={
130 tls1_setup_key_block,
131 tls1_generate_master_secret,
132 tls1_change_cipher_state,
133 tls1_final_finish_mac,
134 TLS1_FINISH_MAC_LENGTH,
135 tls1_cert_verify_mac,
136 TLS_MD_CLIENT_FINISH_CONST,TLS_MD_CLIENT_FINISH_CONST_SIZE,
137 TLS_MD_SERVER_FINISH_CONST,TLS_MD_SERVER_FINISH_CONST_SIZE,
141 long tls1_default_timeout(void)
143 /* 2 hours, the 24 hours mentioned in the TLSv1 spec
144 * is way too long for http, the cache would over fill */
150 if (!ssl3_new(s)) return(0);
151 s->method->ssl_clear(s);
155 void tls1_free(SSL *s)
157 #ifndef OPENSSL_NO_TLSEXT
158 if (s->tlsext_session_ticket)
160 OPENSSL_free(s->tlsext_session_ticket);
162 #endif /* OPENSSL_NO_TLSEXT */
166 void tls1_clear(SSL *s)
169 s->version = s->method->version;
172 #ifndef OPENSSL_NO_EC
173 static int nid_list[] =
175 NID_sect163k1, /* sect163k1 (1) */
176 NID_sect163r1, /* sect163r1 (2) */
177 NID_sect163r2, /* sect163r2 (3) */
178 NID_sect193r1, /* sect193r1 (4) */
179 NID_sect193r2, /* sect193r2 (5) */
180 NID_sect233k1, /* sect233k1 (6) */
181 NID_sect233r1, /* sect233r1 (7) */
182 NID_sect239k1, /* sect239k1 (8) */
183 NID_sect283k1, /* sect283k1 (9) */
184 NID_sect283r1, /* sect283r1 (10) */
185 NID_sect409k1, /* sect409k1 (11) */
186 NID_sect409r1, /* sect409r1 (12) */
187 NID_sect571k1, /* sect571k1 (13) */
188 NID_sect571r1, /* sect571r1 (14) */
189 NID_secp160k1, /* secp160k1 (15) */
190 NID_secp160r1, /* secp160r1 (16) */
191 NID_secp160r2, /* secp160r2 (17) */
192 NID_secp192k1, /* secp192k1 (18) */
193 NID_X9_62_prime192v1, /* secp192r1 (19) */
194 NID_secp224k1, /* secp224k1 (20) */
195 NID_secp224r1, /* secp224r1 (21) */
196 NID_secp256k1, /* secp256k1 (22) */
197 NID_X9_62_prime256v1, /* secp256r1 (23) */
198 NID_secp384r1, /* secp384r1 (24) */
199 NID_secp521r1 /* secp521r1 (25) */
202 int tls1_ec_curve_id2nid(int curve_id)
204 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
205 if ((curve_id < 1) || ((unsigned int)curve_id >
206 sizeof(nid_list)/sizeof(nid_list[0])))
208 return nid_list[curve_id-1];
211 int tls1_ec_nid2curve_id(int nid)
213 /* ECC curves from draft-ietf-tls-ecc-12.txt (Oct. 17, 2005) */
216 case NID_sect163k1: /* sect163k1 (1) */
218 case NID_sect163r1: /* sect163r1 (2) */
220 case NID_sect163r2: /* sect163r2 (3) */
222 case NID_sect193r1: /* sect193r1 (4) */
224 case NID_sect193r2: /* sect193r2 (5) */
226 case NID_sect233k1: /* sect233k1 (6) */
228 case NID_sect233r1: /* sect233r1 (7) */
230 case NID_sect239k1: /* sect239k1 (8) */
232 case NID_sect283k1: /* sect283k1 (9) */
234 case NID_sect283r1: /* sect283r1 (10) */
236 case NID_sect409k1: /* sect409k1 (11) */
238 case NID_sect409r1: /* sect409r1 (12) */
240 case NID_sect571k1: /* sect571k1 (13) */
242 case NID_sect571r1: /* sect571r1 (14) */
244 case NID_secp160k1: /* secp160k1 (15) */
246 case NID_secp160r1: /* secp160r1 (16) */
248 case NID_secp160r2: /* secp160r2 (17) */
250 case NID_secp192k1: /* secp192k1 (18) */
252 case NID_X9_62_prime192v1: /* secp192r1 (19) */
254 case NID_secp224k1: /* secp224k1 (20) */
256 case NID_secp224r1: /* secp224r1 (21) */
258 case NID_secp256k1: /* secp256k1 (22) */
260 case NID_X9_62_prime256v1: /* secp256r1 (23) */
262 case NID_secp384r1: /* secp384r1 (24) */
264 case NID_secp521r1: /* secp521r1 (25) */
270 #endif /* OPENSSL_NO_EC */
272 #ifndef OPENSSL_NO_TLSEXT
273 unsigned char *ssl_add_clienthello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
276 unsigned char *ret = p;
278 /* don't add extensions for SSLv3 unless doing secure renegotiation */
279 if (s->client_version == SSL3_VERSION
280 && !s->s3->send_connection_binding)
285 if (ret>=limit) return NULL; /* this really never occurs, but ... */
287 if (s->tlsext_hostname != NULL)
289 /* Add TLS extension servername to the Client Hello message */
290 unsigned long size_str;
293 /* check for enough space.
294 4 for the servername type and entension length
295 2 for servernamelist length
296 1 for the hostname type
297 2 for hostname length
301 if ((lenmax = limit - ret - 9) < 0
302 || (size_str = strlen(s->tlsext_hostname)) > (unsigned long)lenmax)
305 /* extension type and length */
306 s2n(TLSEXT_TYPE_server_name,ret);
309 /* length of servername list */
312 /* hostname type, length and hostname */
313 *(ret++) = (unsigned char) TLSEXT_NAMETYPE_host_name;
315 memcpy(ret, s->tlsext_hostname, size_str);
319 /* Add RI if renegotiating */
324 if(!ssl_add_clienthello_renegotiate_ext(s, 0, &el, 0))
326 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
330 if((limit - p - 4 - el) < 0) return NULL;
332 s2n(TLSEXT_TYPE_renegotiate,ret);
335 if(!ssl_add_clienthello_renegotiate_ext(s, ret, &el, el))
337 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
344 #ifndef OPENSSL_NO_SRP
345 #define MIN(x,y) (((x)<(y))?(x):(y))
346 /* we add SRP username the first time only if we have one! */
347 if (s->srp_ctx.login != NULL)
348 {/* Add TLS extension SRP username to the Client Hello message */
349 int login_len = MIN(strlen(s->srp_ctx.login) + 1, 255);
352 if ((lenmax = limit - ret - 5) < 0) return NULL;
353 if (login_len > lenmax) return NULL;
356 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
359 s2n(TLSEXT_TYPE_srp,ret);
360 s2n(login_len+1,ret);
362 (*ret++) = (unsigned char) MIN(strlen(s->srp_ctx.login), 254);
363 memcpy(ret, s->srp_ctx.login, MIN(strlen(s->srp_ctx.login), 254));
368 #ifndef OPENSSL_NO_EC
369 if (s->tlsext_ecpointformatlist != NULL &&
370 s->version != DTLS1_VERSION)
372 /* Add TLS extension ECPointFormats to the ClientHello message */
375 if ((lenmax = limit - ret - 5) < 0) return NULL;
376 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
377 if (s->tlsext_ecpointformatlist_length > 255)
379 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
383 s2n(TLSEXT_TYPE_ec_point_formats,ret);
384 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
385 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
386 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
387 ret+=s->tlsext_ecpointformatlist_length;
389 if (s->tlsext_ellipticcurvelist != NULL &&
390 s->version != DTLS1_VERSION)
392 /* Add TLS extension EllipticCurves to the ClientHello message */
395 if ((lenmax = limit - ret - 6) < 0) return NULL;
396 if (s->tlsext_ellipticcurvelist_length > (unsigned long)lenmax) return NULL;
397 if (s->tlsext_ellipticcurvelist_length > 65532)
399 SSLerr(SSL_F_SSL_ADD_CLIENTHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
403 s2n(TLSEXT_TYPE_elliptic_curves,ret);
404 s2n(s->tlsext_ellipticcurvelist_length + 2, ret);
406 /* NB: draft-ietf-tls-ecc-12.txt uses a one-byte prefix for
407 * elliptic_curve_list, but the examples use two bytes.
408 * http://www1.ietf.org/mail-archive/web/tls/current/msg00538.html
409 * resolves this to two bytes.
411 s2n(s->tlsext_ellipticcurvelist_length, ret);
412 memcpy(ret, s->tlsext_ellipticcurvelist, s->tlsext_ellipticcurvelist_length);
413 ret+=s->tlsext_ellipticcurvelist_length;
415 #endif /* OPENSSL_NO_EC */
417 if (!(SSL_get_options(s) & SSL_OP_NO_TICKET))
420 if (!s->new_session && s->session && s->session->tlsext_tick)
421 ticklen = s->session->tlsext_ticklen;
422 else if (s->session && s->tlsext_session_ticket &&
423 s->tlsext_session_ticket->data)
425 ticklen = s->tlsext_session_ticket->length;
426 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
427 if (!s->session->tlsext_tick)
429 memcpy(s->session->tlsext_tick,
430 s->tlsext_session_ticket->data,
432 s->session->tlsext_ticklen = ticklen;
436 if (ticklen == 0 && s->tlsext_session_ticket &&
437 s->tlsext_session_ticket->data == NULL)
439 /* Check for enough room 2 for extension type, 2 for len
442 if ((long)(limit - ret - 4 - ticklen) < 0) return NULL;
443 s2n(TLSEXT_TYPE_session_ticket,ret);
447 memcpy(ret, s->session->tlsext_tick, ticklen);
453 #ifdef TLSEXT_TYPE_opaque_prf_input
454 if (s->s3->client_opaque_prf_input != NULL &&
455 s->version != DTLS1_VERSION)
457 size_t col = s->s3->client_opaque_prf_input_len;
459 if ((long)(limit - ret - 6 - col < 0))
461 if (col > 0xFFFD) /* can't happen */
464 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
467 memcpy(ret, s->s3->client_opaque_prf_input, col);
472 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
473 s->version != DTLS1_VERSION)
476 long extlen, idlen, itmp;
480 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
482 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
483 itmp = i2d_OCSP_RESPID(id, NULL);
489 if (s->tlsext_ocsp_exts)
491 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
498 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
499 s2n(TLSEXT_TYPE_status_request, ret);
500 if (extlen + idlen > 0xFFF0)
502 s2n(extlen + idlen + 5, ret);
503 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
505 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
507 /* save position of id len */
508 unsigned char *q = ret;
509 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
510 /* skip over id len */
512 itmp = i2d_OCSP_RESPID(id, &ret);
518 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
521 if ((extdatalen = ret-p-2)== 0)
528 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
531 unsigned char *ret = p;
533 /* don't add extensions for SSLv3, unless doing secure renegotiation */
534 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
538 if (ret>=limit) return NULL; /* this really never occurs, but ... */
540 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
542 if ((long)(limit - ret - 4) < 0) return NULL;
544 s2n(TLSEXT_TYPE_server_name,ret);
548 if(s->s3->send_connection_binding)
552 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
554 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
558 if((limit - p - 4 - el) < 0) return NULL;
560 s2n(TLSEXT_TYPE_renegotiate,ret);
563 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
565 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
572 #ifndef OPENSSL_NO_EC
573 if (s->tlsext_ecpointformatlist != NULL &&
574 s->version != DTLS1_VERSION)
576 /* Add TLS extension ECPointFormats to the ServerHello message */
579 if ((lenmax = limit - ret - 5) < 0) return NULL;
580 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
581 if (s->tlsext_ecpointformatlist_length > 255)
583 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
587 s2n(TLSEXT_TYPE_ec_point_formats,ret);
588 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
589 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
590 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
591 ret+=s->tlsext_ecpointformatlist_length;
594 /* Currently the server should not respond with a SupportedCurves extension */
595 #endif /* OPENSSL_NO_EC */
597 if (s->tlsext_ticket_expected
598 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
600 if ((long)(limit - ret - 4) < 0) return NULL;
601 s2n(TLSEXT_TYPE_session_ticket,ret);
605 if (s->tlsext_status_expected)
607 if ((long)(limit - ret - 4) < 0) return NULL;
608 s2n(TLSEXT_TYPE_status_request,ret);
612 #ifdef TLSEXT_TYPE_opaque_prf_input
613 if (s->s3->server_opaque_prf_input != NULL &&
614 s->version != DTLS1_VERSION)
616 size_t sol = s->s3->server_opaque_prf_input_len;
618 if ((long)(limit - ret - 6 - sol) < 0)
620 if (sol > 0xFFFD) /* can't happen */
623 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
626 memcpy(ret, s->s3->server_opaque_prf_input, sol);
630 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
631 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
632 { const unsigned char cryptopro_ext[36] = {
633 0xfd, 0xe8, /*65000*/
634 0x00, 0x20, /*32 bytes length*/
635 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
636 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
637 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
638 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
639 if (limit-ret<36) return NULL;
640 memcpy(ret,cryptopro_ext,36);
645 if ((extdatalen = ret-p-2)== 0)
652 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
657 unsigned char *data = *p;
658 int renegotiate_seen = 0;
660 s->servername_done = 0;
661 s->tlsext_status_type = -1;
667 if (data > (d+n-len))
670 while (data <= (d+n-4))
675 if (data+size > (d+n))
678 fprintf(stderr,"Received extension type %d size %d\n",type,size);
680 if (s->tlsext_debug_cb)
681 s->tlsext_debug_cb(s, 0, type, data, size,
682 s->tlsext_debug_arg);
683 /* The servername extension is treated as follows:
685 - Only the hostname type is supported with a maximum length of 255.
686 - The servername is rejected if too long or if it contains zeros,
687 in which case an fatal alert is generated.
688 - The servername field is maintained together with the session cache.
689 - When a session is resumed, the servername call back invoked in order
690 to allow the application to position itself to the right context.
691 - The servername is acknowledged if it is new for a session or when
692 it is identical to a previously used for the same session.
693 Applications can control the behaviour. They can at any time
694 set a 'desirable' servername for a new SSL object. This can be the
695 case for example with HTTPS when a Host: header field is received and
696 a renegotiation is requested. In this case, a possible servername
697 presented in the new client hello is only acknowledged if it matches
698 the value of the Host: field.
699 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
700 if they provide for changing an explicit servername context for the session,
701 i.e. when the session has been established with a servername extension.
702 - On session reconnect, the servername extension may be absent.
706 if (type == TLSEXT_TYPE_server_name)
708 unsigned char *sdata;
714 *al = SSL_AD_DECODE_ERROR;
721 *al = SSL_AD_DECODE_ERROR;
728 servname_type = *(sdata++);
734 *al = SSL_AD_DECODE_ERROR;
737 if (s->servername_done == 0)
738 switch (servname_type)
740 case TLSEXT_NAMETYPE_host_name:
743 if(s->session->tlsext_hostname)
745 *al = SSL_AD_DECODE_ERROR;
748 if (len > TLSEXT_MAXLEN_host_name)
750 *al = TLS1_AD_UNRECOGNIZED_NAME;
753 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
755 *al = TLS1_AD_INTERNAL_ERROR;
758 memcpy(s->session->tlsext_hostname, sdata, len);
759 s->session->tlsext_hostname[len]='\0';
760 if (strlen(s->session->tlsext_hostname) != len) {
761 OPENSSL_free(s->session->tlsext_hostname);
762 s->session->tlsext_hostname = NULL;
763 *al = TLS1_AD_UNRECOGNIZED_NAME;
766 s->servername_done = 1;
770 s->servername_done = s->session->tlsext_hostname
771 && strlen(s->session->tlsext_hostname) == len
772 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
784 *al = SSL_AD_DECODE_ERROR;
789 #ifndef OPENSSL_NO_SRP
790 else if (type == TLSEXT_TYPE_srp)
795 if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
797 memcpy(s->srp_ctx.login, &data[1], len);
798 s->srp_ctx.login[len]='\0';
803 #ifndef OPENSSL_NO_EC
804 else if (type == TLSEXT_TYPE_ec_point_formats &&
805 s->version != DTLS1_VERSION)
807 unsigned char *sdata = data;
808 int ecpointformatlist_length = *(sdata++);
810 if (ecpointformatlist_length != size - 1)
812 *al = TLS1_AD_DECODE_ERROR;
817 if(s->session->tlsext_ecpointformatlist)
819 OPENSSL_free(s->session->tlsext_ecpointformatlist);
820 s->session->tlsext_ecpointformatlist = NULL;
822 s->session->tlsext_ecpointformatlist_length = 0;
823 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
825 *al = TLS1_AD_INTERNAL_ERROR;
828 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
829 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
832 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
833 sdata = s->session->tlsext_ecpointformatlist;
834 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
835 fprintf(stderr,"%i ",*(sdata++));
836 fprintf(stderr,"\n");
839 else if (type == TLSEXT_TYPE_elliptic_curves &&
840 s->version != DTLS1_VERSION)
842 unsigned char *sdata = data;
843 int ellipticcurvelist_length = (*(sdata++) << 8);
844 ellipticcurvelist_length += (*(sdata++));
846 if (ellipticcurvelist_length != size - 2)
848 *al = TLS1_AD_DECODE_ERROR;
853 if(s->session->tlsext_ellipticcurvelist)
855 *al = TLS1_AD_DECODE_ERROR;
858 s->session->tlsext_ellipticcurvelist_length = 0;
859 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
861 *al = TLS1_AD_INTERNAL_ERROR;
864 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
865 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
868 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
869 sdata = s->session->tlsext_ellipticcurvelist;
870 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
871 fprintf(stderr,"%i ",*(sdata++));
872 fprintf(stderr,"\n");
875 #endif /* OPENSSL_NO_EC */
876 #ifdef TLSEXT_TYPE_opaque_prf_input
877 else if (type == TLSEXT_TYPE_opaque_prf_input &&
878 s->version != DTLS1_VERSION)
880 unsigned char *sdata = data;
884 *al = SSL_AD_DECODE_ERROR;
887 n2s(sdata, s->s3->client_opaque_prf_input_len);
888 if (s->s3->client_opaque_prf_input_len != size - 2)
890 *al = SSL_AD_DECODE_ERROR;
894 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
895 OPENSSL_free(s->s3->client_opaque_prf_input);
896 if (s->s3->client_opaque_prf_input_len == 0)
897 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
899 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
900 if (s->s3->client_opaque_prf_input == NULL)
902 *al = TLS1_AD_INTERNAL_ERROR;
907 else if (type == TLSEXT_TYPE_session_ticket)
909 if (s->tls_session_ticket_ext_cb &&
910 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
912 *al = TLS1_AD_INTERNAL_ERROR;
916 else if (type == TLSEXT_TYPE_renegotiate)
918 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
920 renegotiate_seen = 1;
922 else if (type == TLSEXT_TYPE_status_request &&
923 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
928 *al = SSL_AD_DECODE_ERROR;
932 s->tlsext_status_type = *data++;
934 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
936 const unsigned char *sdata;
938 /* Read in responder_id_list */
943 *al = SSL_AD_DECODE_ERROR;
952 *al = SSL_AD_DECODE_ERROR;
960 *al = SSL_AD_DECODE_ERROR;
965 id = d2i_OCSP_RESPID(NULL,
969 *al = SSL_AD_DECODE_ERROR;
974 OCSP_RESPID_free(id);
975 *al = SSL_AD_DECODE_ERROR;
978 if (!s->tlsext_ocsp_ids
979 && !(s->tlsext_ocsp_ids =
980 sk_OCSP_RESPID_new_null()))
982 OCSP_RESPID_free(id);
983 *al = SSL_AD_INTERNAL_ERROR;
986 if (!sk_OCSP_RESPID_push(
987 s->tlsext_ocsp_ids, id))
989 OCSP_RESPID_free(id);
990 *al = SSL_AD_INTERNAL_ERROR;
995 /* Read in request_extensions */
998 *al = SSL_AD_DECODE_ERROR;
1005 *al = SSL_AD_DECODE_ERROR;
1011 s->tlsext_ocsp_exts =
1012 d2i_X509_EXTENSIONS(NULL,
1014 if (!s->tlsext_ocsp_exts
1015 || (data + dsize != sdata))
1017 *al = SSL_AD_DECODE_ERROR;
1022 /* We don't know what to do with any other type
1026 s->tlsext_status_type = -1;
1029 /* session ticket processed earlier */
1037 /* Need RI if renegotiating */
1039 if (!renegotiate_seen && s->renegotiate &&
1040 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1042 *al = SSL_AD_HANDSHAKE_FAILURE;
1043 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
1044 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1051 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1053 unsigned short length;
1054 unsigned short type;
1055 unsigned short size;
1056 unsigned char *data = *p;
1057 int tlsext_servername = 0;
1058 int renegotiate_seen = 0;
1060 if (data >= (d+n-2))
1064 if (data+length != d+n)
1066 *al = SSL_AD_DECODE_ERROR;
1070 while(data <= (d+n-4))
1075 if (data+size > (d+n))
1078 if (s->tlsext_debug_cb)
1079 s->tlsext_debug_cb(s, 1, type, data, size,
1080 s->tlsext_debug_arg);
1082 if (type == TLSEXT_TYPE_server_name)
1084 if (s->tlsext_hostname == NULL || size > 0)
1086 *al = TLS1_AD_UNRECOGNIZED_NAME;
1089 tlsext_servername = 1;
1092 #ifndef OPENSSL_NO_EC
1093 else if (type == TLSEXT_TYPE_ec_point_formats &&
1094 s->version != DTLS1_VERSION)
1096 unsigned char *sdata = data;
1097 int ecpointformatlist_length = *(sdata++);
1099 if (ecpointformatlist_length != size - 1)
1101 *al = TLS1_AD_DECODE_ERROR;
1104 s->session->tlsext_ecpointformatlist_length = 0;
1105 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1106 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1108 *al = TLS1_AD_INTERNAL_ERROR;
1111 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1112 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1114 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1115 sdata = s->session->tlsext_ecpointformatlist;
1116 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1117 fprintf(stderr,"%i ",*(sdata++));
1118 fprintf(stderr,"\n");
1121 #endif /* OPENSSL_NO_EC */
1123 else if (type == TLSEXT_TYPE_session_ticket)
1125 if (s->tls_session_ticket_ext_cb &&
1126 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1128 *al = TLS1_AD_INTERNAL_ERROR;
1131 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1134 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1137 s->tlsext_ticket_expected = 1;
1139 #ifdef TLSEXT_TYPE_opaque_prf_input
1140 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1141 s->version != DTLS1_VERSION)
1143 unsigned char *sdata = data;
1147 *al = SSL_AD_DECODE_ERROR;
1150 n2s(sdata, s->s3->server_opaque_prf_input_len);
1151 if (s->s3->server_opaque_prf_input_len != size - 2)
1153 *al = SSL_AD_DECODE_ERROR;
1157 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1158 OPENSSL_free(s->s3->server_opaque_prf_input);
1159 if (s->s3->server_opaque_prf_input_len == 0)
1160 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1162 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1164 if (s->s3->server_opaque_prf_input == NULL)
1166 *al = TLS1_AD_INTERNAL_ERROR;
1171 else if (type == TLSEXT_TYPE_status_request &&
1172 s->version != DTLS1_VERSION)
1174 /* MUST be empty and only sent if we've requested
1175 * a status request message.
1177 if ((s->tlsext_status_type == -1) || (size > 0))
1179 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1182 /* Set flag to expect CertificateStatus message */
1183 s->tlsext_status_expected = 1;
1185 else if (type == TLSEXT_TYPE_renegotiate)
1187 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1189 renegotiate_seen = 1;
1196 *al = SSL_AD_DECODE_ERROR;
1200 if (!s->hit && tlsext_servername == 1)
1202 if (s->tlsext_hostname)
1204 if (s->session->tlsext_hostname == NULL)
1206 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1207 if (!s->session->tlsext_hostname)
1209 *al = SSL_AD_UNRECOGNIZED_NAME;
1215 *al = SSL_AD_DECODE_ERROR;
1225 /* Determine if we need to see RI. Strictly speaking if we want to
1226 * avoid an attack we should *always* see RI even on initial server
1227 * hello because the client doesn't see any renegotiation during an
1228 * attack. However this would mean we could not connect to any server
1229 * which doesn't support RI so for the immediate future tolerate RI
1230 * absence on initial connect only.
1232 if (!renegotiate_seen
1233 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
1234 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1236 *al = SSL_AD_HANDSHAKE_FAILURE;
1237 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
1238 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1246 int ssl_prepare_clienthello_tlsext(SSL *s)
1248 #ifndef OPENSSL_NO_EC
1249 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1250 * and elliptic curves we support.
1255 unsigned long alg_k, alg_a;
1256 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1258 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1260 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1262 alg_k = c->algorithm_mkey;
1263 alg_a = c->algorithm_auth;
1264 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1270 using_ecc = using_ecc && (s->version >= TLS1_VERSION);
1273 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1274 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1276 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1279 s->tlsext_ecpointformatlist_length = 3;
1280 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1281 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1282 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1284 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1285 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1286 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1287 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1289 s->tlsext_ellipticcurvelist_length = 0;
1290 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1293 for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <=
1294 sizeof(nid_list)/sizeof(nid_list[0]); i++)
1297 #endif /* OPENSSL_NO_EC */
1299 #ifdef TLSEXT_TYPE_opaque_prf_input
1303 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1305 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1310 if (s->tlsext_opaque_prf_input != NULL)
1312 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1313 OPENSSL_free(s->s3->client_opaque_prf_input);
1315 if (s->tlsext_opaque_prf_input_len == 0)
1316 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1318 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1319 if (s->s3->client_opaque_prf_input == NULL)
1321 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1324 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1328 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1329 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1336 int ssl_prepare_serverhello_tlsext(SSL *s)
1338 #ifndef OPENSSL_NO_EC
1339 /* If we are server and using an ECC cipher suite, send the point formats we support
1340 * if the client sent us an ECPointsFormat extension. Note that the server is not
1341 * supposed to send an EllipticCurves extension.
1344 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1345 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1346 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1347 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1351 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1352 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1354 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1357 s->tlsext_ecpointformatlist_length = 3;
1358 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1359 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1360 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1362 #endif /* OPENSSL_NO_EC */
1367 int ssl_check_clienthello_tlsext(SSL *s)
1369 int ret=SSL_TLSEXT_ERR_NOACK;
1370 int al = SSL_AD_UNRECOGNIZED_NAME;
1372 #ifndef OPENSSL_NO_EC
1373 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1374 * ssl3_choose_cipher in s3_lib.c.
1376 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1377 * ssl3_choose_cipher in s3_lib.c.
1381 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1382 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1383 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1384 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1386 /* If status request then ask callback what to do.
1387 * Note: this must be called after servername callbacks in case
1388 * the certificate has changed.
1390 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1393 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1396 /* We don't want to send a status request response */
1397 case SSL_TLSEXT_ERR_NOACK:
1398 s->tlsext_status_expected = 0;
1400 /* status request response should be sent */
1401 case SSL_TLSEXT_ERR_OK:
1402 if (s->tlsext_ocsp_resp)
1403 s->tlsext_status_expected = 1;
1405 s->tlsext_status_expected = 0;
1407 /* something bad happened */
1408 case SSL_TLSEXT_ERR_ALERT_FATAL:
1409 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1410 al = SSL_AD_INTERNAL_ERROR;
1415 s->tlsext_status_expected = 0;
1417 #ifdef TLSEXT_TYPE_opaque_prf_input
1419 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1420 * but we might be sending an alert in response to the client hello,
1421 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1425 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1427 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1430 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1431 al = SSL_AD_INTERNAL_ERROR;
1436 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1437 OPENSSL_free(s->s3->server_opaque_prf_input);
1438 s->s3->server_opaque_prf_input = NULL;
1440 if (s->tlsext_opaque_prf_input != NULL)
1442 if (s->s3->client_opaque_prf_input != NULL &&
1443 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1445 /* can only use this extension if we have a server opaque PRF input
1446 * of the same length as the client opaque PRF input! */
1448 if (s->tlsext_opaque_prf_input_len == 0)
1449 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1451 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1452 if (s->s3->server_opaque_prf_input == NULL)
1454 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1455 al = SSL_AD_INTERNAL_ERROR;
1458 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1462 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1464 /* The callback wants to enforce use of the extension,
1465 * but we can't do that with the client opaque PRF input;
1466 * abort the handshake.
1468 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1469 al = SSL_AD_HANDSHAKE_FAILURE;
1477 case SSL_TLSEXT_ERR_ALERT_FATAL:
1478 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1481 case SSL_TLSEXT_ERR_ALERT_WARNING:
1482 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1485 case SSL_TLSEXT_ERR_NOACK:
1486 s->servername_done=0;
1492 int ssl_check_serverhello_tlsext(SSL *s)
1494 int ret=SSL_TLSEXT_ERR_NOACK;
1495 int al = SSL_AD_UNRECOGNIZED_NAME;
1497 #ifndef OPENSSL_NO_EC
1498 /* If we are client and using an elliptic curve cryptography cipher
1499 * suite, then if server returns an EC point formats lists extension
1500 * it must contain uncompressed.
1502 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1503 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1504 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1505 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
1506 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1508 /* we are using an ECC cipher */
1510 unsigned char *list;
1511 int found_uncompressed = 0;
1512 list = s->session->tlsext_ecpointformatlist;
1513 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1515 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1517 found_uncompressed = 1;
1521 if (!found_uncompressed)
1523 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1527 ret = SSL_TLSEXT_ERR_OK;
1528 #endif /* OPENSSL_NO_EC */
1530 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1531 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1532 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1533 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1535 #ifdef TLSEXT_TYPE_opaque_prf_input
1536 if (s->s3->server_opaque_prf_input_len > 0)
1538 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1539 * So first verify that we really have a value from the server too. */
1541 if (s->s3->server_opaque_prf_input == NULL)
1543 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1544 al = SSL_AD_HANDSHAKE_FAILURE;
1547 /* Anytime the server *has* sent an opaque PRF input, we need to check
1548 * that we have a client opaque PRF input of the same size. */
1549 if (s->s3->client_opaque_prf_input == NULL ||
1550 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1552 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1553 al = SSL_AD_ILLEGAL_PARAMETER;
1558 /* If we've requested certificate status and we wont get one
1561 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1562 && s->ctx && s->ctx->tlsext_status_cb)
1565 /* Set resp to NULL, resplen to -1 so callback knows
1566 * there is no response.
1568 if (s->tlsext_ocsp_resp)
1570 OPENSSL_free(s->tlsext_ocsp_resp);
1571 s->tlsext_ocsp_resp = NULL;
1573 s->tlsext_ocsp_resplen = -1;
1574 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1577 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1578 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1582 al = SSL_AD_INTERNAL_ERROR;
1583 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1589 case SSL_TLSEXT_ERR_ALERT_FATAL:
1590 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1593 case SSL_TLSEXT_ERR_ALERT_WARNING:
1594 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1597 case SSL_TLSEXT_ERR_NOACK:
1598 s->servername_done=0;
1604 /* Since the server cache lookup is done early on in the processing of client
1605 * hello and other operations depend on the result we need to handle any TLS
1606 * session ticket extension at the same time.
1609 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1610 const unsigned char *limit, SSL_SESSION **ret)
1612 /* Point after session ID in client hello */
1613 const unsigned char *p = session_id + len;
1616 /* If tickets disabled behave as if no ticket present
1617 * to permit stateful resumption.
1619 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1622 if ((s->version <= SSL3_VERSION) || !limit)
1626 /* Skip past DTLS cookie */
1627 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
1634 /* Skip past cipher list */
1639 /* Skip past compression algorithm list */
1644 /* Now at start of extensions */
1645 if ((p + 2) >= limit)
1648 while ((p + 4) <= limit)
1650 unsigned short type, size;
1653 if (p + size > limit)
1655 if (type == TLSEXT_TYPE_session_ticket)
1657 /* If tickets disabled indicate cache miss which will
1658 * trigger a full handshake
1660 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1662 /* If zero length note client will accept a ticket
1663 * and indicate cache miss to trigger full handshake
1667 s->tlsext_ticket_expected = 1;
1668 return 0; /* Cache miss */
1670 if (s->tls_session_secret_cb)
1672 /* Indicate cache miss here and instead of
1673 * generating the session from ticket now,
1674 * trigger abbreviated handshake based on
1675 * external mechanism to calculate the master
1679 return tls_decrypt_ticket(s, p, size, session_id, len,
1687 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1688 const unsigned char *sess_id, int sesslen,
1689 SSL_SESSION **psess)
1692 unsigned char *sdec;
1693 const unsigned char *p;
1694 int slen, mlen, renew_ticket = 0;
1695 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1698 SSL_CTX *tctx = s->initial_ctx;
1699 /* Need at least keyname + iv + some encrypted data */
1702 /* Initialize session ticket encryption and HMAC contexts */
1703 HMAC_CTX_init(&hctx);
1704 EVP_CIPHER_CTX_init(&ctx);
1705 if (tctx->tlsext_ticket_key_cb)
1707 unsigned char *nctick = (unsigned char *)etick;
1708 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
1719 /* Check key name matches */
1720 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
1722 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1723 tlsext_tick_md(), NULL);
1724 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1725 tctx->tlsext_tick_aes_key, etick + 16);
1727 /* Attempt to process session ticket, first conduct sanity and
1728 * integrity checks on ticket.
1730 mlen = HMAC_size(&hctx);
1733 EVP_CIPHER_CTX_cleanup(&ctx);
1737 /* Check HMAC of encrypted ticket */
1738 HMAC_Update(&hctx, etick, eticklen);
1739 HMAC_Final(&hctx, tick_hmac, NULL);
1740 HMAC_CTX_cleanup(&hctx);
1741 if (memcmp(tick_hmac, etick + eticklen, mlen))
1743 /* Attempt to decrypt session data */
1744 /* Move p after IV to start of encrypted ticket, update length */
1745 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1746 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1747 sdec = OPENSSL_malloc(eticklen);
1750 EVP_CIPHER_CTX_cleanup(&ctx);
1753 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1754 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1757 EVP_CIPHER_CTX_cleanup(&ctx);
1760 sess = d2i_SSL_SESSION(NULL, &p, slen);
1764 /* The session ID if non-empty is used by some clients to
1765 * detect that the ticket has been accepted. So we copy it to
1766 * the session structure. If it is empty set length to zero
1767 * as required by standard.
1770 memcpy(sess->session_id, sess_id, sesslen);
1771 sess->session_id_length = sesslen;
1773 s->tlsext_ticket_expected = renew_ticket;
1776 /* If session decrypt failure indicate a cache miss and set state to
1780 s->tlsext_ticket_expected = 1;