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 if (s->version >= TLS1_2_VERSION)
455 /* List of supported signature algorithms and hashes.
456 * Should make this customisable at some point, for
457 * now include everything we support.
459 static unsigned char sigalgs[] = {
460 #ifndef OPENSSL_NO_RSA
461 # ifndef OPENSSL_NO_SHA512
462 TLSEXT_hash_sha512, TLSEXT_signature_rsa,
463 TLSEXT_hash_sha384, TLSEXT_signature_rsa,
465 # ifndef OPENSSL_NO_SHA256
466 TLSEXT_hash_sha256, TLSEXT_signature_rsa,
467 TLSEXT_hash_sha224, TLSEXT_signature_rsa,
469 # ifndef OPENSSL_NO_SHA
470 TLSEXT_hash_sha1, TLSEXT_signature_rsa,
473 #ifndef OPENSSL_NO_ECDSA
474 # ifndef OPENSSL_NO_SHA512
475 TLSEXT_hash_sha512, TLSEXT_signature_ecdsa,
476 TLSEXT_hash_sha384, TLSEXT_signature_ecdsa,
478 # ifndef OPENSSL_NO_SHA256
479 TLSEXT_hash_sha256, TLSEXT_signature_ecdsa,
480 TLSEXT_hash_sha224, TLSEXT_signature_ecdsa,
482 # ifndef OPENSSL_NO_SHA
483 TLSEXT_hash_sha1, TLSEXT_signature_ecdsa,
486 #ifndef OPENSSL_NO_DSA
487 # ifndef OPENSSL_NO_SHA512
488 TLSEXT_hash_sha512, TLSEXT_signature_dsa,
489 TLSEXT_hash_sha384, TLSEXT_signature_dsa,
491 # ifndef OPENSSL_NO_SHA256
492 TLSEXT_hash_sha256, TLSEXT_signature_dsa,
493 TLSEXT_hash_sha224, TLSEXT_signature_dsa,
495 # ifndef OPENSSL_NO_SHA
496 TLSEXT_hash_sha1, TLSEXT_signature_dsa
500 if ((size_t)(limit - ret) < sizeof(sigalgs) + 6)
502 s2n(TLSEXT_TYPE_signature_algorithms,ret);
503 s2n(sizeof(sigalgs) + 2, ret);
504 s2n(sizeof(sigalgs), ret);
505 memcpy(ret, sigalgs, sizeof(sigalgs));
506 ret += sizeof(sigalgs);
509 #ifdef TLSEXT_TYPE_opaque_prf_input
510 if (s->s3->client_opaque_prf_input != NULL &&
511 s->version != DTLS1_VERSION)
513 size_t col = s->s3->client_opaque_prf_input_len;
515 if ((long)(limit - ret - 6 - col < 0))
517 if (col > 0xFFFD) /* can't happen */
520 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
523 memcpy(ret, s->s3->client_opaque_prf_input, col);
528 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp &&
529 s->version != DTLS1_VERSION)
532 long extlen, idlen, itmp;
536 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
538 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
539 itmp = i2d_OCSP_RESPID(id, NULL);
545 if (s->tlsext_ocsp_exts)
547 extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
554 if ((long)(limit - ret - 7 - extlen - idlen) < 0) return NULL;
555 s2n(TLSEXT_TYPE_status_request, ret);
556 if (extlen + idlen > 0xFFF0)
558 s2n(extlen + idlen + 5, ret);
559 *(ret++) = TLSEXT_STATUSTYPE_ocsp;
561 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++)
563 /* save position of id len */
564 unsigned char *q = ret;
565 id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
566 /* skip over id len */
568 itmp = i2d_OCSP_RESPID(id, &ret);
574 i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &ret);
577 if ((extdatalen = ret-p-2)== 0)
584 unsigned char *ssl_add_serverhello_tlsext(SSL *s, unsigned char *p, unsigned char *limit)
587 unsigned char *ret = p;
589 /* don't add extensions for SSLv3, unless doing secure renegotiation */
590 if (s->version == SSL3_VERSION && !s->s3->send_connection_binding)
594 if (ret>=limit) return NULL; /* this really never occurs, but ... */
596 if (!s->hit && s->servername_done == 1 && s->session->tlsext_hostname != NULL)
598 if ((long)(limit - ret - 4) < 0) return NULL;
600 s2n(TLSEXT_TYPE_server_name,ret);
604 if(s->s3->send_connection_binding)
608 if(!ssl_add_serverhello_renegotiate_ext(s, 0, &el, 0))
610 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
614 if((limit - p - 4 - el) < 0) return NULL;
616 s2n(TLSEXT_TYPE_renegotiate,ret);
619 if(!ssl_add_serverhello_renegotiate_ext(s, ret, &el, el))
621 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
628 #ifndef OPENSSL_NO_EC
629 if (s->tlsext_ecpointformatlist != NULL &&
630 s->version != DTLS1_VERSION)
632 /* Add TLS extension ECPointFormats to the ServerHello message */
635 if ((lenmax = limit - ret - 5) < 0) return NULL;
636 if (s->tlsext_ecpointformatlist_length > (unsigned long)lenmax) return NULL;
637 if (s->tlsext_ecpointformatlist_length > 255)
639 SSLerr(SSL_F_SSL_ADD_SERVERHELLO_TLSEXT, ERR_R_INTERNAL_ERROR);
643 s2n(TLSEXT_TYPE_ec_point_formats,ret);
644 s2n(s->tlsext_ecpointformatlist_length + 1,ret);
645 *(ret++) = (unsigned char) s->tlsext_ecpointformatlist_length;
646 memcpy(ret, s->tlsext_ecpointformatlist, s->tlsext_ecpointformatlist_length);
647 ret+=s->tlsext_ecpointformatlist_length;
650 /* Currently the server should not respond with a SupportedCurves extension */
651 #endif /* OPENSSL_NO_EC */
653 if (s->tlsext_ticket_expected
654 && !(SSL_get_options(s) & SSL_OP_NO_TICKET))
656 if ((long)(limit - ret - 4) < 0) return NULL;
657 s2n(TLSEXT_TYPE_session_ticket,ret);
661 if (s->tlsext_status_expected)
663 if ((long)(limit - ret - 4) < 0) return NULL;
664 s2n(TLSEXT_TYPE_status_request,ret);
668 #ifdef TLSEXT_TYPE_opaque_prf_input
669 if (s->s3->server_opaque_prf_input != NULL &&
670 s->version != DTLS1_VERSION)
672 size_t sol = s->s3->server_opaque_prf_input_len;
674 if ((long)(limit - ret - 6 - sol) < 0)
676 if (sol > 0xFFFD) /* can't happen */
679 s2n(TLSEXT_TYPE_opaque_prf_input, ret);
682 memcpy(ret, s->s3->server_opaque_prf_input, sol);
686 if (((s->s3->tmp.new_cipher->id & 0xFFFF)==0x80 || (s->s3->tmp.new_cipher->id & 0xFFFF)==0x81)
687 && (SSL_get_options(s) & SSL_OP_CRYPTOPRO_TLSEXT_BUG))
688 { const unsigned char cryptopro_ext[36] = {
689 0xfd, 0xe8, /*65000*/
690 0x00, 0x20, /*32 bytes length*/
691 0x30, 0x1e, 0x30, 0x08, 0x06, 0x06, 0x2a, 0x85,
692 0x03, 0x02, 0x02, 0x09, 0x30, 0x08, 0x06, 0x06,
693 0x2a, 0x85, 0x03, 0x02, 0x02, 0x16, 0x30, 0x08,
694 0x06, 0x06, 0x2a, 0x85, 0x03, 0x02, 0x02, 0x17};
695 if (limit-ret<36) return NULL;
696 memcpy(ret,cryptopro_ext,36);
701 if ((extdatalen = ret-p-2)== 0)
708 int ssl_parse_clienthello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
713 unsigned char *data = *p;
714 int renegotiate_seen = 0;
717 s->servername_done = 0;
718 s->tlsext_status_type = -1;
724 if (data > (d+n-len))
727 while (data <= (d+n-4))
732 if (data+size > (d+n))
735 fprintf(stderr,"Received extension type %d size %d\n",type,size);
737 if (s->tlsext_debug_cb)
738 s->tlsext_debug_cb(s, 0, type, data, size,
739 s->tlsext_debug_arg);
740 /* The servername extension is treated as follows:
742 - Only the hostname type is supported with a maximum length of 255.
743 - The servername is rejected if too long or if it contains zeros,
744 in which case an fatal alert is generated.
745 - The servername field is maintained together with the session cache.
746 - When a session is resumed, the servername call back invoked in order
747 to allow the application to position itself to the right context.
748 - The servername is acknowledged if it is new for a session or when
749 it is identical to a previously used for the same session.
750 Applications can control the behaviour. They can at any time
751 set a 'desirable' servername for a new SSL object. This can be the
752 case for example with HTTPS when a Host: header field is received and
753 a renegotiation is requested. In this case, a possible servername
754 presented in the new client hello is only acknowledged if it matches
755 the value of the Host: field.
756 - Applications must use SSL_OP_NO_SESSION_RESUMPTION_ON_RENEGOTIATION
757 if they provide for changing an explicit servername context for the session,
758 i.e. when the session has been established with a servername extension.
759 - On session reconnect, the servername extension may be absent.
763 if (type == TLSEXT_TYPE_server_name)
765 unsigned char *sdata;
771 *al = SSL_AD_DECODE_ERROR;
778 *al = SSL_AD_DECODE_ERROR;
785 servname_type = *(sdata++);
791 *al = SSL_AD_DECODE_ERROR;
794 if (s->servername_done == 0)
795 switch (servname_type)
797 case TLSEXT_NAMETYPE_host_name:
800 if(s->session->tlsext_hostname)
802 *al = SSL_AD_DECODE_ERROR;
805 if (len > TLSEXT_MAXLEN_host_name)
807 *al = TLS1_AD_UNRECOGNIZED_NAME;
810 if ((s->session->tlsext_hostname = OPENSSL_malloc(len+1)) == NULL)
812 *al = TLS1_AD_INTERNAL_ERROR;
815 memcpy(s->session->tlsext_hostname, sdata, len);
816 s->session->tlsext_hostname[len]='\0';
817 if (strlen(s->session->tlsext_hostname) != len) {
818 OPENSSL_free(s->session->tlsext_hostname);
819 s->session->tlsext_hostname = NULL;
820 *al = TLS1_AD_UNRECOGNIZED_NAME;
823 s->servername_done = 1;
827 s->servername_done = s->session->tlsext_hostname
828 && strlen(s->session->tlsext_hostname) == len
829 && strncmp(s->session->tlsext_hostname, (char *)sdata, len) == 0;
841 *al = SSL_AD_DECODE_ERROR;
846 #ifndef OPENSSL_NO_SRP
847 else if (type == TLSEXT_TYPE_srp)
852 if ((s->srp_ctx.login = OPENSSL_malloc(len+1)) == NULL)
854 memcpy(s->srp_ctx.login, &data[1], len);
855 s->srp_ctx.login[len]='\0';
860 #ifndef OPENSSL_NO_EC
861 else if (type == TLSEXT_TYPE_ec_point_formats &&
862 s->version != DTLS1_VERSION)
864 unsigned char *sdata = data;
865 int ecpointformatlist_length = *(sdata++);
867 if (ecpointformatlist_length != size - 1)
869 *al = TLS1_AD_DECODE_ERROR;
874 if(s->session->tlsext_ecpointformatlist)
876 OPENSSL_free(s->session->tlsext_ecpointformatlist);
877 s->session->tlsext_ecpointformatlist = NULL;
879 s->session->tlsext_ecpointformatlist_length = 0;
880 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
882 *al = TLS1_AD_INTERNAL_ERROR;
885 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
886 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
889 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ecpointformatlist (length=%i) ", s->session->tlsext_ecpointformatlist_length);
890 sdata = s->session->tlsext_ecpointformatlist;
891 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
892 fprintf(stderr,"%i ",*(sdata++));
893 fprintf(stderr,"\n");
896 else if (type == TLSEXT_TYPE_elliptic_curves &&
897 s->version != DTLS1_VERSION)
899 unsigned char *sdata = data;
900 int ellipticcurvelist_length = (*(sdata++) << 8);
901 ellipticcurvelist_length += (*(sdata++));
903 if (ellipticcurvelist_length != size - 2)
905 *al = TLS1_AD_DECODE_ERROR;
910 if(s->session->tlsext_ellipticcurvelist)
912 *al = TLS1_AD_DECODE_ERROR;
915 s->session->tlsext_ellipticcurvelist_length = 0;
916 if ((s->session->tlsext_ellipticcurvelist = OPENSSL_malloc(ellipticcurvelist_length)) == NULL)
918 *al = TLS1_AD_INTERNAL_ERROR;
921 s->session->tlsext_ellipticcurvelist_length = ellipticcurvelist_length;
922 memcpy(s->session->tlsext_ellipticcurvelist, sdata, ellipticcurvelist_length);
925 fprintf(stderr,"ssl_parse_clienthello_tlsext s->session->tlsext_ellipticcurvelist (length=%i) ", s->session->tlsext_ellipticcurvelist_length);
926 sdata = s->session->tlsext_ellipticcurvelist;
927 for (i = 0; i < s->session->tlsext_ellipticcurvelist_length; i++)
928 fprintf(stderr,"%i ",*(sdata++));
929 fprintf(stderr,"\n");
932 #endif /* OPENSSL_NO_EC */
933 #ifdef TLSEXT_TYPE_opaque_prf_input
934 else if (type == TLSEXT_TYPE_opaque_prf_input &&
935 s->version != DTLS1_VERSION)
937 unsigned char *sdata = data;
941 *al = SSL_AD_DECODE_ERROR;
944 n2s(sdata, s->s3->client_opaque_prf_input_len);
945 if (s->s3->client_opaque_prf_input_len != size - 2)
947 *al = SSL_AD_DECODE_ERROR;
951 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
952 OPENSSL_free(s->s3->client_opaque_prf_input);
953 if (s->s3->client_opaque_prf_input_len == 0)
954 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
956 s->s3->client_opaque_prf_input = BUF_memdup(sdata, s->s3->client_opaque_prf_input_len);
957 if (s->s3->client_opaque_prf_input == NULL)
959 *al = TLS1_AD_INTERNAL_ERROR;
964 else if (type == TLSEXT_TYPE_session_ticket)
966 if (s->tls_session_ticket_ext_cb &&
967 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
969 *al = TLS1_AD_INTERNAL_ERROR;
973 else if (type == TLSEXT_TYPE_renegotiate)
975 if(!ssl_parse_clienthello_renegotiate_ext(s, data, size, al))
977 renegotiate_seen = 1;
979 else if (type == TLSEXT_TYPE_signature_algorithms)
982 if (sigalg_seen || size < 2)
984 *al = SSL_AD_DECODE_ERROR;
990 if (dsize != size || dsize & 1)
992 *al = SSL_AD_DECODE_ERROR;
995 if (!tls1_process_sigalgs(s, data, dsize))
997 *al = SSL_AD_DECODE_ERROR;
1001 else if (type == TLSEXT_TYPE_status_request &&
1002 s->version != DTLS1_VERSION && s->ctx->tlsext_status_cb)
1007 *al = SSL_AD_DECODE_ERROR;
1011 s->tlsext_status_type = *data++;
1013 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_ocsp)
1015 const unsigned char *sdata;
1017 /* Read in responder_id_list */
1022 *al = SSL_AD_DECODE_ERROR;
1031 *al = SSL_AD_DECODE_ERROR;
1035 dsize -= 2 + idsize;
1039 *al = SSL_AD_DECODE_ERROR;
1044 id = d2i_OCSP_RESPID(NULL,
1048 *al = SSL_AD_DECODE_ERROR;
1053 OCSP_RESPID_free(id);
1054 *al = SSL_AD_DECODE_ERROR;
1057 if (!s->tlsext_ocsp_ids
1058 && !(s->tlsext_ocsp_ids =
1059 sk_OCSP_RESPID_new_null()))
1061 OCSP_RESPID_free(id);
1062 *al = SSL_AD_INTERNAL_ERROR;
1065 if (!sk_OCSP_RESPID_push(
1066 s->tlsext_ocsp_ids, id))
1068 OCSP_RESPID_free(id);
1069 *al = SSL_AD_INTERNAL_ERROR;
1074 /* Read in request_extensions */
1077 *al = SSL_AD_DECODE_ERROR;
1084 *al = SSL_AD_DECODE_ERROR;
1090 s->tlsext_ocsp_exts =
1091 d2i_X509_EXTENSIONS(NULL,
1093 if (!s->tlsext_ocsp_exts
1094 || (data + dsize != sdata))
1096 *al = SSL_AD_DECODE_ERROR;
1101 /* We don't know what to do with any other type
1105 s->tlsext_status_type = -1;
1108 /* session ticket processed earlier */
1116 /* Need RI if renegotiating */
1118 if (!renegotiate_seen && s->renegotiate &&
1119 !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1121 *al = SSL_AD_HANDSHAKE_FAILURE;
1122 SSLerr(SSL_F_SSL_PARSE_CLIENTHELLO_TLSEXT,
1123 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1130 int ssl_parse_serverhello_tlsext(SSL *s, unsigned char **p, unsigned char *d, int n, int *al)
1132 unsigned short length;
1133 unsigned short type;
1134 unsigned short size;
1135 unsigned char *data = *p;
1136 int tlsext_servername = 0;
1137 int renegotiate_seen = 0;
1139 if (data >= (d+n-2))
1143 if (data+length != d+n)
1145 *al = SSL_AD_DECODE_ERROR;
1149 while(data <= (d+n-4))
1154 if (data+size > (d+n))
1157 if (s->tlsext_debug_cb)
1158 s->tlsext_debug_cb(s, 1, type, data, size,
1159 s->tlsext_debug_arg);
1161 if (type == TLSEXT_TYPE_server_name)
1163 if (s->tlsext_hostname == NULL || size > 0)
1165 *al = TLS1_AD_UNRECOGNIZED_NAME;
1168 tlsext_servername = 1;
1171 #ifndef OPENSSL_NO_EC
1172 else if (type == TLSEXT_TYPE_ec_point_formats &&
1173 s->version != DTLS1_VERSION)
1175 unsigned char *sdata = data;
1176 int ecpointformatlist_length = *(sdata++);
1178 if (ecpointformatlist_length != size - 1)
1180 *al = TLS1_AD_DECODE_ERROR;
1183 s->session->tlsext_ecpointformatlist_length = 0;
1184 if (s->session->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->session->tlsext_ecpointformatlist);
1185 if ((s->session->tlsext_ecpointformatlist = OPENSSL_malloc(ecpointformatlist_length)) == NULL)
1187 *al = TLS1_AD_INTERNAL_ERROR;
1190 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
1191 memcpy(s->session->tlsext_ecpointformatlist, sdata, ecpointformatlist_length);
1193 fprintf(stderr,"ssl_parse_serverhello_tlsext s->session->tlsext_ecpointformatlist ");
1194 sdata = s->session->tlsext_ecpointformatlist;
1195 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1196 fprintf(stderr,"%i ",*(sdata++));
1197 fprintf(stderr,"\n");
1200 #endif /* OPENSSL_NO_EC */
1202 else if (type == TLSEXT_TYPE_session_ticket)
1204 if (s->tls_session_ticket_ext_cb &&
1205 !s->tls_session_ticket_ext_cb(s, data, size, s->tls_session_ticket_ext_cb_arg))
1207 *al = TLS1_AD_INTERNAL_ERROR;
1210 if ((SSL_get_options(s) & SSL_OP_NO_TICKET)
1213 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1216 s->tlsext_ticket_expected = 1;
1218 #ifdef TLSEXT_TYPE_opaque_prf_input
1219 else if (type == TLSEXT_TYPE_opaque_prf_input &&
1220 s->version != DTLS1_VERSION)
1222 unsigned char *sdata = data;
1226 *al = SSL_AD_DECODE_ERROR;
1229 n2s(sdata, s->s3->server_opaque_prf_input_len);
1230 if (s->s3->server_opaque_prf_input_len != size - 2)
1232 *al = SSL_AD_DECODE_ERROR;
1236 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1237 OPENSSL_free(s->s3->server_opaque_prf_input);
1238 if (s->s3->server_opaque_prf_input_len == 0)
1239 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1241 s->s3->server_opaque_prf_input = BUF_memdup(sdata, s->s3->server_opaque_prf_input_len);
1243 if (s->s3->server_opaque_prf_input == NULL)
1245 *al = TLS1_AD_INTERNAL_ERROR;
1250 else if (type == TLSEXT_TYPE_status_request &&
1251 s->version != DTLS1_VERSION)
1253 /* MUST be empty and only sent if we've requested
1254 * a status request message.
1256 if ((s->tlsext_status_type == -1) || (size > 0))
1258 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1261 /* Set flag to expect CertificateStatus message */
1262 s->tlsext_status_expected = 1;
1264 else if (type == TLSEXT_TYPE_renegotiate)
1266 if(!ssl_parse_serverhello_renegotiate_ext(s, data, size, al))
1268 renegotiate_seen = 1;
1275 *al = SSL_AD_DECODE_ERROR;
1279 if (!s->hit && tlsext_servername == 1)
1281 if (s->tlsext_hostname)
1283 if (s->session->tlsext_hostname == NULL)
1285 s->session->tlsext_hostname = BUF_strdup(s->tlsext_hostname);
1286 if (!s->session->tlsext_hostname)
1288 *al = SSL_AD_UNRECOGNIZED_NAME;
1294 *al = SSL_AD_DECODE_ERROR;
1304 /* Determine if we need to see RI. Strictly speaking if we want to
1305 * avoid an attack we should *always* see RI even on initial server
1306 * hello because the client doesn't see any renegotiation during an
1307 * attack. However this would mean we could not connect to any server
1308 * which doesn't support RI so for the immediate future tolerate RI
1309 * absence on initial connect only.
1311 if (!renegotiate_seen
1312 && !(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
1313 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION))
1315 *al = SSL_AD_HANDSHAKE_FAILURE;
1316 SSLerr(SSL_F_SSL_PARSE_SERVERHELLO_TLSEXT,
1317 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
1325 int ssl_prepare_clienthello_tlsext(SSL *s)
1327 #ifndef OPENSSL_NO_EC
1328 /* If we are client and using an elliptic curve cryptography cipher suite, send the point formats
1329 * and elliptic curves we support.
1334 unsigned long alg_k, alg_a;
1335 STACK_OF(SSL_CIPHER) *cipher_stack = SSL_get_ciphers(s);
1337 for (i = 0; i < sk_SSL_CIPHER_num(cipher_stack); i++)
1339 SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
1341 alg_k = c->algorithm_mkey;
1342 alg_a = c->algorithm_auth;
1343 if ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe) || (alg_a & SSL_aECDSA)))
1349 using_ecc = using_ecc && (s->version >= TLS1_VERSION);
1352 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1353 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1355 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1358 s->tlsext_ecpointformatlist_length = 3;
1359 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1360 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1361 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1363 /* we support all named elliptic curves in draft-ietf-tls-ecc-12 */
1364 if (s->tlsext_ellipticcurvelist != NULL) OPENSSL_free(s->tlsext_ellipticcurvelist);
1365 s->tlsext_ellipticcurvelist_length = sizeof(nid_list)/sizeof(nid_list[0]) * 2;
1366 if ((s->tlsext_ellipticcurvelist = OPENSSL_malloc(s->tlsext_ellipticcurvelist_length)) == NULL)
1368 s->tlsext_ellipticcurvelist_length = 0;
1369 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1372 for (i = 1, j = s->tlsext_ellipticcurvelist; (unsigned int)i <=
1373 sizeof(nid_list)/sizeof(nid_list[0]); i++)
1376 #endif /* OPENSSL_NO_EC */
1378 #ifdef TLSEXT_TYPE_opaque_prf_input
1382 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1384 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1389 if (s->tlsext_opaque_prf_input != NULL)
1391 if (s->s3->client_opaque_prf_input != NULL) /* shouldn't really happen */
1392 OPENSSL_free(s->s3->client_opaque_prf_input);
1394 if (s->tlsext_opaque_prf_input_len == 0)
1395 s->s3->client_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1397 s->s3->client_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1398 if (s->s3->client_opaque_prf_input == NULL)
1400 SSLerr(SSL_F_SSL_PREPARE_CLIENTHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1403 s->s3->client_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1407 /* at callback's request, insist on receiving an appropriate server opaque PRF input */
1408 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1415 int ssl_prepare_serverhello_tlsext(SSL *s)
1417 #ifndef OPENSSL_NO_EC
1418 /* If we are server and using an ECC cipher suite, send the point formats we support
1419 * if the client sent us an ECPointsFormat extension. Note that the server is not
1420 * supposed to send an EllipticCurves extension.
1423 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1424 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1425 int using_ecc = (alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA);
1426 using_ecc = using_ecc && (s->session->tlsext_ecpointformatlist != NULL);
1430 if (s->tlsext_ecpointformatlist != NULL) OPENSSL_free(s->tlsext_ecpointformatlist);
1431 if ((s->tlsext_ecpointformatlist = OPENSSL_malloc(3)) == NULL)
1433 SSLerr(SSL_F_SSL_PREPARE_SERVERHELLO_TLSEXT,ERR_R_MALLOC_FAILURE);
1436 s->tlsext_ecpointformatlist_length = 3;
1437 s->tlsext_ecpointformatlist[0] = TLSEXT_ECPOINTFORMAT_uncompressed;
1438 s->tlsext_ecpointformatlist[1] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_prime;
1439 s->tlsext_ecpointformatlist[2] = TLSEXT_ECPOINTFORMAT_ansiX962_compressed_char2;
1441 #endif /* OPENSSL_NO_EC */
1446 int ssl_check_clienthello_tlsext(SSL *s)
1448 int ret=SSL_TLSEXT_ERR_NOACK;
1449 int al = SSL_AD_UNRECOGNIZED_NAME;
1451 #ifndef OPENSSL_NO_EC
1452 /* The handling of the ECPointFormats extension is done elsewhere, namely in
1453 * ssl3_choose_cipher in s3_lib.c.
1455 /* The handling of the EllipticCurves extension is done elsewhere, namely in
1456 * ssl3_choose_cipher in s3_lib.c.
1460 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1461 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1462 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1463 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1465 /* If status request then ask callback what to do.
1466 * Note: this must be called after servername callbacks in case
1467 * the certificate has changed.
1469 if ((s->tlsext_status_type != -1) && s->ctx && s->ctx->tlsext_status_cb)
1472 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1475 /* We don't want to send a status request response */
1476 case SSL_TLSEXT_ERR_NOACK:
1477 s->tlsext_status_expected = 0;
1479 /* status request response should be sent */
1480 case SSL_TLSEXT_ERR_OK:
1481 if (s->tlsext_ocsp_resp)
1482 s->tlsext_status_expected = 1;
1484 s->tlsext_status_expected = 0;
1486 /* something bad happened */
1487 case SSL_TLSEXT_ERR_ALERT_FATAL:
1488 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1489 al = SSL_AD_INTERNAL_ERROR;
1494 s->tlsext_status_expected = 0;
1496 #ifdef TLSEXT_TYPE_opaque_prf_input
1498 /* This sort of belongs into ssl_prepare_serverhello_tlsext(),
1499 * but we might be sending an alert in response to the client hello,
1500 * so this has to happen here in ssl_check_clienthello_tlsext(). */
1504 if (s->ctx->tlsext_opaque_prf_input_callback != 0)
1506 r = s->ctx->tlsext_opaque_prf_input_callback(s, NULL, 0, s->ctx->tlsext_opaque_prf_input_callback_arg);
1509 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1510 al = SSL_AD_INTERNAL_ERROR;
1515 if (s->s3->server_opaque_prf_input != NULL) /* shouldn't really happen */
1516 OPENSSL_free(s->s3->server_opaque_prf_input);
1517 s->s3->server_opaque_prf_input = NULL;
1519 if (s->tlsext_opaque_prf_input != NULL)
1521 if (s->s3->client_opaque_prf_input != NULL &&
1522 s->s3->client_opaque_prf_input_len == s->tlsext_opaque_prf_input_len)
1524 /* can only use this extension if we have a server opaque PRF input
1525 * of the same length as the client opaque PRF input! */
1527 if (s->tlsext_opaque_prf_input_len == 0)
1528 s->s3->server_opaque_prf_input = OPENSSL_malloc(1); /* dummy byte just to get non-NULL */
1530 s->s3->server_opaque_prf_input = BUF_memdup(s->tlsext_opaque_prf_input, s->tlsext_opaque_prf_input_len);
1531 if (s->s3->server_opaque_prf_input == NULL)
1533 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1534 al = SSL_AD_INTERNAL_ERROR;
1537 s->s3->server_opaque_prf_input_len = s->tlsext_opaque_prf_input_len;
1541 if (r == 2 && s->s3->server_opaque_prf_input == NULL)
1543 /* The callback wants to enforce use of the extension,
1544 * but we can't do that with the client opaque PRF input;
1545 * abort the handshake.
1547 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1548 al = SSL_AD_HANDSHAKE_FAILURE;
1556 case SSL_TLSEXT_ERR_ALERT_FATAL:
1557 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1560 case SSL_TLSEXT_ERR_ALERT_WARNING:
1561 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1564 case SSL_TLSEXT_ERR_NOACK:
1565 s->servername_done=0;
1571 int ssl_check_serverhello_tlsext(SSL *s)
1573 int ret=SSL_TLSEXT_ERR_NOACK;
1574 int al = SSL_AD_UNRECOGNIZED_NAME;
1576 #ifndef OPENSSL_NO_EC
1577 /* If we are client and using an elliptic curve cryptography cipher
1578 * suite, then if server returns an EC point formats lists extension
1579 * it must contain uncompressed.
1581 unsigned long alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
1582 unsigned long alg_a = s->s3->tmp.new_cipher->algorithm_auth;
1583 if ((s->tlsext_ecpointformatlist != NULL) && (s->tlsext_ecpointformatlist_length > 0) &&
1584 (s->session->tlsext_ecpointformatlist != NULL) && (s->session->tlsext_ecpointformatlist_length > 0) &&
1585 ((alg_k & (SSL_kEECDH|SSL_kECDHr|SSL_kECDHe)) || (alg_a & SSL_aECDSA)))
1587 /* we are using an ECC cipher */
1589 unsigned char *list;
1590 int found_uncompressed = 0;
1591 list = s->session->tlsext_ecpointformatlist;
1592 for (i = 0; i < s->session->tlsext_ecpointformatlist_length; i++)
1594 if (*(list++) == TLSEXT_ECPOINTFORMAT_uncompressed)
1596 found_uncompressed = 1;
1600 if (!found_uncompressed)
1602 SSLerr(SSL_F_SSL_CHECK_SERVERHELLO_TLSEXT,SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
1606 ret = SSL_TLSEXT_ERR_OK;
1607 #endif /* OPENSSL_NO_EC */
1609 if (s->ctx != NULL && s->ctx->tlsext_servername_callback != 0)
1610 ret = s->ctx->tlsext_servername_callback(s, &al, s->ctx->tlsext_servername_arg);
1611 else if (s->initial_ctx != NULL && s->initial_ctx->tlsext_servername_callback != 0)
1612 ret = s->initial_ctx->tlsext_servername_callback(s, &al, s->initial_ctx->tlsext_servername_arg);
1614 #ifdef TLSEXT_TYPE_opaque_prf_input
1615 if (s->s3->server_opaque_prf_input_len > 0)
1617 /* This case may indicate that we, as a client, want to insist on using opaque PRF inputs.
1618 * So first verify that we really have a value from the server too. */
1620 if (s->s3->server_opaque_prf_input == NULL)
1622 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1623 al = SSL_AD_HANDSHAKE_FAILURE;
1626 /* Anytime the server *has* sent an opaque PRF input, we need to check
1627 * that we have a client opaque PRF input of the same size. */
1628 if (s->s3->client_opaque_prf_input == NULL ||
1629 s->s3->client_opaque_prf_input_len != s->s3->server_opaque_prf_input_len)
1631 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1632 al = SSL_AD_ILLEGAL_PARAMETER;
1637 /* If we've requested certificate status and we wont get one
1640 if ((s->tlsext_status_type != -1) && !(s->tlsext_status_expected)
1641 && s->ctx && s->ctx->tlsext_status_cb)
1644 /* Set resp to NULL, resplen to -1 so callback knows
1645 * there is no response.
1647 if (s->tlsext_ocsp_resp)
1649 OPENSSL_free(s->tlsext_ocsp_resp);
1650 s->tlsext_ocsp_resp = NULL;
1652 s->tlsext_ocsp_resplen = -1;
1653 r = s->ctx->tlsext_status_cb(s, s->ctx->tlsext_status_arg);
1656 al = SSL_AD_BAD_CERTIFICATE_STATUS_RESPONSE;
1657 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1661 al = SSL_AD_INTERNAL_ERROR;
1662 ret = SSL_TLSEXT_ERR_ALERT_FATAL;
1668 case SSL_TLSEXT_ERR_ALERT_FATAL:
1669 ssl3_send_alert(s,SSL3_AL_FATAL,al);
1672 case SSL_TLSEXT_ERR_ALERT_WARNING:
1673 ssl3_send_alert(s,SSL3_AL_WARNING,al);
1676 case SSL_TLSEXT_ERR_NOACK:
1677 s->servername_done=0;
1683 /* Since the server cache lookup is done early on in the processing of client
1684 * hello and other operations depend on the result we need to handle any TLS
1685 * session ticket extension at the same time.
1688 int tls1_process_ticket(SSL *s, unsigned char *session_id, int len,
1689 const unsigned char *limit, SSL_SESSION **ret)
1691 /* Point after session ID in client hello */
1692 const unsigned char *p = session_id + len;
1695 /* If tickets disabled behave as if no ticket present
1696 * to permit stateful resumption.
1698 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1701 if ((s->version <= SSL3_VERSION) || !limit)
1705 /* Skip past DTLS cookie */
1706 if (s->version == DTLS1_VERSION || s->version == DTLS1_BAD_VER)
1713 /* Skip past cipher list */
1718 /* Skip past compression algorithm list */
1723 /* Now at start of extensions */
1724 if ((p + 2) >= limit)
1727 while ((p + 4) <= limit)
1729 unsigned short type, size;
1732 if (p + size > limit)
1734 if (type == TLSEXT_TYPE_session_ticket)
1736 /* If tickets disabled indicate cache miss which will
1737 * trigger a full handshake
1739 if (SSL_get_options(s) & SSL_OP_NO_TICKET)
1741 /* If zero length note client will accept a ticket
1742 * and indicate cache miss to trigger full handshake
1746 s->tlsext_ticket_expected = 1;
1747 return 0; /* Cache miss */
1749 if (s->tls_session_secret_cb)
1751 /* Indicate cache miss here and instead of
1752 * generating the session from ticket now,
1753 * trigger abbreviated handshake based on
1754 * external mechanism to calculate the master
1758 return tls_decrypt_ticket(s, p, size, session_id, len,
1766 static int tls_decrypt_ticket(SSL *s, const unsigned char *etick, int eticklen,
1767 const unsigned char *sess_id, int sesslen,
1768 SSL_SESSION **psess)
1771 unsigned char *sdec;
1772 const unsigned char *p;
1773 int slen, mlen, renew_ticket = 0;
1774 unsigned char tick_hmac[EVP_MAX_MD_SIZE];
1777 SSL_CTX *tctx = s->initial_ctx;
1778 /* Need at least keyname + iv + some encrypted data */
1781 /* Initialize session ticket encryption and HMAC contexts */
1782 HMAC_CTX_init(&hctx);
1783 EVP_CIPHER_CTX_init(&ctx);
1784 if (tctx->tlsext_ticket_key_cb)
1786 unsigned char *nctick = (unsigned char *)etick;
1787 int rv = tctx->tlsext_ticket_key_cb(s, nctick, nctick + 16,
1798 /* Check key name matches */
1799 if (memcmp(etick, tctx->tlsext_tick_key_name, 16))
1801 HMAC_Init_ex(&hctx, tctx->tlsext_tick_hmac_key, 16,
1802 tlsext_tick_md(), NULL);
1803 EVP_DecryptInit_ex(&ctx, EVP_aes_128_cbc(), NULL,
1804 tctx->tlsext_tick_aes_key, etick + 16);
1806 /* Attempt to process session ticket, first conduct sanity and
1807 * integrity checks on ticket.
1809 mlen = HMAC_size(&hctx);
1812 EVP_CIPHER_CTX_cleanup(&ctx);
1816 /* Check HMAC of encrypted ticket */
1817 HMAC_Update(&hctx, etick, eticklen);
1818 HMAC_Final(&hctx, tick_hmac, NULL);
1819 HMAC_CTX_cleanup(&hctx);
1820 if (memcmp(tick_hmac, etick + eticklen, mlen))
1822 /* Attempt to decrypt session data */
1823 /* Move p after IV to start of encrypted ticket, update length */
1824 p = etick + 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1825 eticklen -= 16 + EVP_CIPHER_CTX_iv_length(&ctx);
1826 sdec = OPENSSL_malloc(eticklen);
1829 EVP_CIPHER_CTX_cleanup(&ctx);
1832 EVP_DecryptUpdate(&ctx, sdec, &slen, p, eticklen);
1833 if (EVP_DecryptFinal(&ctx, sdec + slen, &mlen) <= 0)
1836 EVP_CIPHER_CTX_cleanup(&ctx);
1839 sess = d2i_SSL_SESSION(NULL, &p, slen);
1843 /* The session ID if non-empty is used by some clients to
1844 * detect that the ticket has been accepted. So we copy it to
1845 * the session structure. If it is empty set length to zero
1846 * as required by standard.
1849 memcpy(sess->session_id, sess_id, sesslen);
1850 sess->session_id_length = sesslen;
1852 s->tlsext_ticket_expected = renew_ticket;
1855 /* If session decrypt failure indicate a cache miss and set state to
1859 s->tlsext_ticket_expected = 1;
1863 /* Tables to translate from NIDs to TLS v1.2 ids */
1871 static tls12_lookup tls12_md[] = {
1872 #ifndef OPENSSL_NO_MD5
1873 {NID_md5, TLSEXT_hash_md5},
1875 #ifndef OPENSSL_NO_SHA
1876 {NID_sha1, TLSEXT_hash_sha1},
1878 #ifndef OPENSSL_NO_SHA256
1879 {NID_sha224, TLSEXT_hash_sha224},
1880 {NID_sha256, TLSEXT_hash_sha256},
1882 #ifndef OPENSSL_NO_SHA512
1883 {NID_sha384, TLSEXT_hash_sha384},
1884 {NID_sha512, TLSEXT_hash_sha512}
1888 static tls12_lookup tls12_sig[] = {
1889 #ifndef OPENSSL_NO_RSA
1890 {EVP_PKEY_RSA, TLSEXT_signature_rsa},
1892 #ifndef OPENSSL_NO_RSA
1893 {EVP_PKEY_DSA, TLSEXT_signature_dsa},
1895 #ifndef OPENSSL_NO_ECDSA
1896 {EVP_PKEY_EC, TLSEXT_signature_ecdsa}
1900 static int tls12_find_id(int nid, tls12_lookup *table, size_t tlen)
1903 for (i = 0; i < tlen; i++)
1905 if (table[i].nid == nid)
1911 static int tls12_find_nid(int id, tls12_lookup *table, size_t tlen)
1914 for (i = 0; i < tlen; i++)
1916 if (table[i].id == id)
1917 return table[i].nid;
1923 int tls12_get_sigandhash(unsigned char *p, const EVP_PKEY *pk, const EVP_MD *md)
1926 md_id = tls12_find_id(EVP_MD_type(md), tls12_md,
1927 sizeof(tls12_md)/sizeof(tls12_lookup));
1930 sig_id = tls12_get_sigid(pk);
1933 p[0] = (unsigned char)md_id;
1934 p[1] = (unsigned char)sig_id;
1938 int tls12_get_sigid(const EVP_PKEY *pk)
1940 return tls12_find_id(pk->type, tls12_sig,
1941 sizeof(tls12_sig)/sizeof(tls12_lookup));
1944 const EVP_MD *tls12_get_hash(unsigned char hash_alg)
1948 #ifndef OPENSSL_NO_MD5
1949 case TLSEXT_hash_md5:
1952 #ifndef OPENSSL_NO_SHA
1953 case TLSEXT_hash_sha1:
1956 #ifndef OPENSSL_NO_SHA256
1957 case TLSEXT_hash_sha224:
1958 return EVP_sha224();
1960 case TLSEXT_hash_sha256:
1961 return EVP_sha256();
1963 #ifndef OPENSSL_NO_SHA512
1964 case TLSEXT_hash_sha384:
1965 return EVP_sha384();
1967 case TLSEXT_hash_sha512:
1968 return EVP_sha512();
1976 /* Set preferred digest for each key type */
1978 int tls1_process_sigalgs(SSL *s, const unsigned char *data, int dsize)
1983 /* Extension ignored for TLS versions below 1.2 */
1984 if (s->version < TLS1_2_VERSION)
1986 /* Should never happen */
1990 c->pkeys[SSL_PKEY_DSA_SIGN].digest = NULL;
1991 c->pkeys[SSL_PKEY_RSA_SIGN].digest = NULL;
1992 c->pkeys[SSL_PKEY_RSA_ENC].digest = NULL;
1993 c->pkeys[SSL_PKEY_ECC].digest = NULL;
1995 for (i = 0; i < dsize; i += 2)
1997 unsigned char hash_alg = data[i], sig_alg = data[i+1];
2001 #ifndef OPENSSL_NO_RSA
2002 case TLSEXT_signature_rsa:
2003 idx = SSL_PKEY_RSA_SIGN;
2006 #ifndef OPENSSL_NO_DSA
2007 case TLSEXT_signature_dsa:
2008 idx = SSL_PKEY_DSA_SIGN;
2011 #ifndef OPENSSL_NO_ECDSA
2012 case TLSEXT_signature_ecdsa:
2020 if (c->pkeys[idx].digest == NULL)
2022 md = tls12_get_hash(hash_alg);
2025 c->pkeys[idx].digest = md;
2026 if (idx == SSL_PKEY_RSA_SIGN)
2027 c->pkeys[SSL_PKEY_RSA_ENC].digest = md;
2034 /* Set any remaining keys to default values. NOTE: if alg is not
2035 * supported it stays as NULL.
2037 #ifndef OPENSSL_NO_DSA
2038 if (!c->pkeys[SSL_PKEY_DSA_SIGN].digest)
2039 c->pkeys[SSL_PKEY_DSA_SIGN].digest = EVP_dss1();
2041 #ifndef OPENSSL_NO_RSA
2042 if (!c->pkeys[SSL_PKEY_RSA_SIGN].digest)
2044 c->pkeys[SSL_PKEY_RSA_SIGN].digest = EVP_sha1();
2045 c->pkeys[SSL_PKEY_RSA_ENC].digest = EVP_sha1();
2048 #ifndef OPENSSL_NO_ECDSA
2049 if (!c->pkeys[SSL_PKEY_ECC].digest)
2050 c->pkeys[SSL_PKEY_ECC].digest = EVP_ecdsa();