2 * Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include <openssl/ocsp.h>
12 #include "../ssl_locl.h"
13 #include "statem_locl.h"
15 int tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt, X509 *x,
16 size_t chainidx, int *al)
18 /* Add RI if renegotiating */
22 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate)
23 || !WPACKET_start_sub_packet_u16(pkt)
24 || !WPACKET_sub_memcpy_u8(pkt, s->s3->previous_client_finished,
25 s->s3->previous_client_finished_len)
26 || !WPACKET_close(pkt)) {
27 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE, ERR_R_INTERNAL_ERROR);
34 int tls_construct_ctos_server_name(SSL *s, WPACKET *pkt, X509 *x,
35 size_t chainidx, int *al)
37 if (s->tlsext_hostname == NULL)
40 /* Add TLS extension servername to the Client Hello message */
41 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name)
42 /* Sub-packet for server_name extension */
43 || !WPACKET_start_sub_packet_u16(pkt)
44 /* Sub-packet for servername list (always 1 hostname)*/
45 || !WPACKET_start_sub_packet_u16(pkt)
46 || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name)
47 || !WPACKET_sub_memcpy_u16(pkt, s->tlsext_hostname,
48 strlen(s->tlsext_hostname))
49 || !WPACKET_close(pkt)
50 || !WPACKET_close(pkt)) {
51 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, ERR_R_INTERNAL_ERROR);
58 #ifndef OPENSSL_NO_SRP
59 int tls_construct_ctos_srp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
62 /* Add SRP username if there is one */
63 if (s->srp_ctx.login == NULL)
66 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp)
67 /* Sub-packet for SRP extension */
68 || !WPACKET_start_sub_packet_u16(pkt)
69 || !WPACKET_start_sub_packet_u8(pkt)
70 /* login must not be zero...internal error if so */
71 || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH)
72 || !WPACKET_memcpy(pkt, s->srp_ctx.login,
73 strlen(s->srp_ctx.login))
74 || !WPACKET_close(pkt)
75 || !WPACKET_close(pkt)) {
76 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR);
85 static int use_ecc(SSL *s)
88 unsigned long alg_k, alg_a;
89 STACK_OF(SSL_CIPHER) *cipher_stack = NULL;
91 /* See if we support any ECC ciphersuites */
92 if (s->version == SSL3_VERSION)
95 cipher_stack = SSL_get_ciphers(s);
96 end = sk_SSL_CIPHER_num(cipher_stack);
97 for (i = 0; i < end; i++) {
98 const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
100 alg_k = c->algorithm_mkey;
101 alg_a = c->algorithm_auth;
102 if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK))
103 || (alg_a & SSL_aECDSA)
104 || c->min_tls >= TLS1_3_VERSION)
111 int tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, X509 *x,
112 size_t chainidx, int *al)
114 const unsigned char *pformats;
120 /* Add TLS extension ECPointFormats to the ClientHello message */
121 tls1_get_formatlist(s, &pformats, &num_formats);
123 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats)
124 /* Sub-packet for formats extension */
125 || !WPACKET_start_sub_packet_u16(pkt)
126 || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats)
127 || !WPACKET_close(pkt)) {
128 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
135 int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, X509 *x,
136 size_t chainidx, int *al)
138 const unsigned char *pcurves = NULL, *pcurvestmp;
139 size_t num_curves = 0, i;
145 * Add TLS extension supported_groups to the ClientHello message
147 /* TODO(TLS1.3): Add support for DHE groups */
148 pcurves = s->tlsext_supportedgroupslist;
149 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
150 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
151 ERR_R_INTERNAL_ERROR);
154 pcurvestmp = pcurves;
156 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups)
157 /* Sub-packet for supported_groups extension */
158 || !WPACKET_start_sub_packet_u16(pkt)
159 || !WPACKET_start_sub_packet_u16(pkt)) {
160 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
161 ERR_R_INTERNAL_ERROR);
164 /* Copy curve ID if supported */
165 for (i = 0; i < num_curves; i++, pcurvestmp += 2) {
166 if (tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) {
167 if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0])
168 || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) {
169 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
170 ERR_R_INTERNAL_ERROR);
175 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
176 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
177 ERR_R_INTERNAL_ERROR);
185 int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, X509 *x,
186 size_t chainidx, int *al)
190 if (!tls_use_ticket(s))
193 if (!s->new_session && s->session != NULL
194 && s->session->tlsext_tick != NULL) {
195 ticklen = s->session->tlsext_ticklen;
196 } else if (s->session && s->tlsext_session_ticket != NULL
197 && s->tlsext_session_ticket->data != NULL) {
198 ticklen = s->tlsext_session_ticket->length;
199 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
200 if (s->session->tlsext_tick == NULL) {
201 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET,
202 ERR_R_INTERNAL_ERROR);
205 memcpy(s->session->tlsext_tick,
206 s->tlsext_session_ticket->data, ticklen);
207 s->session->tlsext_ticklen = ticklen;
212 if (ticklen == 0 && s->tlsext_session_ticket != NULL &&
213 s->tlsext_session_ticket->data == NULL)
216 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket)
217 || !WPACKET_sub_memcpy_u16(pkt, s->session->tlsext_tick, ticklen)) {
218 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
225 int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
229 const unsigned char *salg;
231 if (!SSL_CLIENT_USE_SIGALGS(s))
234 salglen = tls12_get_psigalgs(s, &salg);
235 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms)
236 /* Sub-packet for sig-algs extension */
237 || !WPACKET_start_sub_packet_u16(pkt)
238 /* Sub-packet for the actual list */
239 || !WPACKET_start_sub_packet_u16(pkt)
240 || !tls12_copy_sigalgs(s, pkt, salg, salglen)
241 || !WPACKET_close(pkt)
242 || !WPACKET_close(pkt)) {
243 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR);
250 #ifndef OPENSSL_NO_OCSP
251 int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, X509 *x,
252 size_t chainidx, int *al)
256 /* This extension isn't defined for client Certificates */
260 if (s->tlsext_status_type != TLSEXT_STATUSTYPE_ocsp)
263 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request)
264 /* Sub-packet for status request extension */
265 || !WPACKET_start_sub_packet_u16(pkt)
266 || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp)
267 /* Sub-packet for the ids */
268 || !WPACKET_start_sub_packet_u16(pkt)) {
269 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
272 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) {
273 unsigned char *idbytes;
274 OCSP_RESPID *id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
275 int idlen = i2d_OCSP_RESPID(id, NULL);
278 /* Sub-packet for an individual id */
279 || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes)
280 || i2d_OCSP_RESPID(id, &idbytes) != idlen) {
281 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
282 ERR_R_INTERNAL_ERROR);
286 if (!WPACKET_close(pkt)
287 || !WPACKET_start_sub_packet_u16(pkt)) {
288 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
291 if (s->tlsext_ocsp_exts) {
292 unsigned char *extbytes;
293 int extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
296 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
297 ERR_R_INTERNAL_ERROR);
300 if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes)
301 || i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &extbytes)
303 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
304 ERR_R_INTERNAL_ERROR);
308 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
309 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
317 #ifndef OPENSSL_NO_NEXTPROTONEG
318 int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
321 if (s->ctx->next_proto_select_cb == NULL || s->s3->tmp.finish_md_len != 0)
325 * The client advertises an empty extension to indicate its support
326 * for Next Protocol Negotiation
328 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg)
329 || !WPACKET_put_bytes_u16(pkt, 0)) {
330 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR);
338 int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
341 s->s3->alpn_sent = 0;
344 * finish_md_len is non-zero during a renegotiation, so
345 * this avoids sending ALPN during the renegotiation
347 if (s->alpn_client_proto_list == NULL || s->s3->tmp.finish_md_len != 0)
350 if (!WPACKET_put_bytes_u16(pkt,
351 TLSEXT_TYPE_application_layer_protocol_negotiation)
352 /* Sub-packet ALPN extension */
353 || !WPACKET_start_sub_packet_u16(pkt)
354 || !WPACKET_sub_memcpy_u16(pkt, s->alpn_client_proto_list,
355 s->alpn_client_proto_list_len)
356 || !WPACKET_close(pkt)) {
357 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR);
360 s->s3->alpn_sent = 1;
366 #ifndef OPENSSL_NO_SRTP
367 int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
370 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s);
376 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp)
377 /* Sub-packet for SRTP extension */
378 || !WPACKET_start_sub_packet_u16(pkt)
379 /* Sub-packet for the protection profile list */
380 || !WPACKET_start_sub_packet_u16(pkt)) {
381 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
385 end = sk_SRTP_PROTECTION_PROFILE_num(clnt);
386 for (i = 0; i < end; i++) {
387 const SRTP_PROTECTION_PROFILE *prof =
388 sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
390 if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) {
391 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
395 if (!WPACKET_close(pkt)
396 /* Add an empty use_mki value */
397 || !WPACKET_put_bytes_u8(pkt, 0)
398 || !WPACKET_close(pkt)) {
399 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
407 int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
410 if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
413 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac)
414 || !WPACKET_put_bytes_u16(pkt, 0)) {
415 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR);
422 #ifndef OPENSSL_NO_CT
423 int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
426 if (s->ct_validation_callback == NULL)
429 /* Not defined for client Certificates */
433 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp)
434 || !WPACKET_put_bytes_u16(pkt, 0)) {
435 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR);
443 int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
446 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
447 || !WPACKET_put_bytes_u16(pkt, 0)) {
448 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR);
455 int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, X509 *x,
456 size_t chainidx, int *al)
458 int currv, min_version, max_version, reason;
460 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions)
461 || !WPACKET_start_sub_packet_u16(pkt)
462 || !WPACKET_start_sub_packet_u8(pkt)) {
463 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
464 ERR_R_INTERNAL_ERROR);
468 reason = ssl_get_client_min_max_version(s, &min_version, &max_version);
470 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason);
475 * TODO(TLS1.3): There is some discussion on the TLS list as to wheter
476 * we should include versions <TLS1.2. For the moment we do. To be
479 for (currv = max_version; currv >= min_version; currv--) {
480 /* TODO(TLS1.3): Remove this first if clause prior to release!! */
481 if (currv == TLS1_3_VERSION) {
482 if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) {
483 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
484 ERR_R_INTERNAL_ERROR);
487 } else if (!WPACKET_put_bytes_u16(pkt, currv)) {
488 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
489 ERR_R_INTERNAL_ERROR);
493 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
494 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
495 ERR_R_INTERNAL_ERROR);
502 int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
505 #ifndef OPENSSL_NO_TLS1_3
506 size_t i, sharessent = 0, num_curves = 0;
507 const unsigned char *pcurves = NULL;
509 /* key_share extension */
510 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
511 /* Extension data sub-packet */
512 || !WPACKET_start_sub_packet_u16(pkt)
513 /* KeyShare list sub-packet */
514 || !WPACKET_start_sub_packet_u16(pkt)) {
515 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
519 pcurves = s->tlsext_supportedgroupslist;
520 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
521 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
526 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
529 for (i = 0; i < num_curves && sharessent < 1; i++, pcurves += 2) {
530 unsigned char *encodedPoint = NULL;
531 unsigned int curve_id = 0;
532 EVP_PKEY *key_share_key = NULL;
535 if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED))
538 if (s->s3->tmp.pkey != NULL) {
539 /* Shouldn't happen! */
540 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
544 /* Generate a key for this key_share */
545 curve_id = (pcurves[0] << 8) | pcurves[1];
546 key_share_key = ssl_generate_pkey_curve(curve_id);
547 if (key_share_key == NULL) {
548 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EVP_LIB);
552 /* Encode the public key. */
553 encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key,
555 if (encodedlen == 0) {
556 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EC_LIB);
557 EVP_PKEY_free(key_share_key);
561 /* Create KeyShareEntry */
562 if (!WPACKET_put_bytes_u16(pkt, curve_id)
563 || !WPACKET_sub_memcpy_u16(pkt, encodedPoint, encodedlen)) {
564 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
565 EVP_PKEY_free(key_share_key);
566 OPENSSL_free(encodedPoint);
571 * TODO(TLS1.3): When changing to send more than one key_share we're
572 * going to need to be able to save more than one EVP_PKEY. For now
573 * we reuse the existing tmp.pkey
575 s->s3->group_id = curve_id;
576 s->s3->tmp.pkey = key_share_key;
578 OPENSSL_free(encodedPoint);
581 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
582 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
590 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
591 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
593 int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
596 unsigned char *padbytes;
599 if ((s->options & SSL_OP_TLSEXT_PADDING) == 0)
603 * Add padding to workaround bugs in F5 terminators. See
604 * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this
605 * code calculates the length of all existing extensions it MUST always
608 if (!WPACKET_get_total_written(pkt, &hlen)) {
609 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
613 if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) {
614 /* Calculate the amond of padding we need to add */
615 hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen;
618 * Take off the size of extension header itself (2 bytes for type and
619 * 2 bytes for length bytes)
626 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding)
627 || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) {
628 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
631 memset(padbytes, 0, hlen);
638 * Parse the server's renegotiation binding and abort if it's not right
640 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
643 size_t expected_len = s->s3->previous_client_finished_len
644 + s->s3->previous_server_finished_len;
646 const unsigned char *data;
648 /* Check for logic errors */
649 assert(expected_len == 0 || s->s3->previous_client_finished_len != 0);
650 assert(expected_len == 0 || s->s3->previous_server_finished_len != 0);
652 /* Parse the length byte */
653 if (!PACKET_get_1_len(pkt, &ilen)) {
654 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
655 SSL_R_RENEGOTIATION_ENCODING_ERR);
656 *al = SSL_AD_ILLEGAL_PARAMETER;
660 /* Consistency check */
661 if (PACKET_remaining(pkt) != ilen) {
662 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
663 SSL_R_RENEGOTIATION_ENCODING_ERR);
664 *al = SSL_AD_ILLEGAL_PARAMETER;
668 /* Check that the extension matches */
669 if (ilen != expected_len) {
670 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
671 SSL_R_RENEGOTIATION_MISMATCH);
672 *al = SSL_AD_HANDSHAKE_FAILURE;
676 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
677 || memcmp(data, s->s3->previous_client_finished,
678 s->s3->previous_client_finished_len) != 0) {
679 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
680 SSL_R_RENEGOTIATION_MISMATCH);
681 *al = SSL_AD_HANDSHAKE_FAILURE;
685 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
686 || memcmp(data, s->s3->previous_server_finished,
687 s->s3->previous_server_finished_len) != 0) {
688 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
689 SSL_R_RENEGOTIATION_MISMATCH);
690 *al = SSL_AD_ILLEGAL_PARAMETER;
693 s->s3->send_connection_binding = 1;
698 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
701 if (s->tlsext_hostname == NULL || PACKET_remaining(pkt) > 0) {
702 *al = SSL_AD_UNRECOGNIZED_NAME;
707 if (s->session->tlsext_hostname != NULL) {
708 *al = SSL_AD_INTERNAL_ERROR;
711 s->session->tlsext_hostname = OPENSSL_strdup(s->tlsext_hostname);
712 if (s->session->tlsext_hostname == NULL) {
713 *al = SSL_AD_INTERNAL_ERROR;
721 #ifndef OPENSSL_NO_EC
722 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
725 unsigned int ecpointformatlist_length;
726 PACKET ecptformatlist;
728 if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) {
729 *al = SSL_AD_DECODE_ERROR;
733 ecpointformatlist_length = PACKET_remaining(&ecptformatlist);
734 s->session->tlsext_ecpointformatlist_length = 0;
736 OPENSSL_free(s->session->tlsext_ecpointformatlist);
737 s->session->tlsext_ecpointformatlist =
738 OPENSSL_malloc(ecpointformatlist_length);
739 if (s->session->tlsext_ecpointformatlist == NULL) {
740 *al = SSL_AD_INTERNAL_ERROR;
744 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
746 if (!PACKET_copy_bytes(&ecptformatlist,
747 s->session->tlsext_ecpointformatlist,
748 ecpointformatlist_length)) {
749 *al = SSL_AD_INTERNAL_ERROR;
758 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
761 if (s->tls_session_ticket_ext_cb != NULL &&
762 !s->tls_session_ticket_ext_cb(s, PACKET_data(pkt),
763 PACKET_remaining(pkt),
764 s->tls_session_ticket_ext_cb_arg)) {
765 *al = SSL_AD_INTERNAL_ERROR;
769 if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) {
770 *al = SSL_AD_UNSUPPORTED_EXTENSION;
774 s->tlsext_ticket_expected = 1;
779 #ifndef OPENSSL_NO_OCSP
780 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
784 * MUST only be sent if we've requested a status
785 * request message. In TLS <= 1.2 it must also be empty.
787 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_nothing
788 || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0)) {
789 *al = SSL_AD_UNSUPPORTED_EXTENSION;
793 if (SSL_IS_TLS13(s)) {
794 /* We only know how to handle this if it's for the first Certificate in
795 * the chain. We ignore any other repsonses.
799 return tls_process_cert_status_body(s, pkt, al);
802 /* Set flag to expect CertificateStatus message */
803 s->tlsext_status_expected = 1;
810 #ifndef OPENSSL_NO_CT
811 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
814 * Only take it if we asked for it - i.e if there is no CT validation
815 * callback set, then a custom extension MAY be processing it, so we
816 * need to let control continue to flow to that.
818 if (s->ct_validation_callback != NULL) {
819 size_t size = PACKET_remaining(pkt);
821 /* Simply copy it off for later processing */
822 OPENSSL_free(s->tlsext_scts);
823 s->tlsext_scts = NULL;
825 s->tlsext_scts_len = size;
827 s->tlsext_scts = OPENSSL_malloc(size);
828 if (s->tlsext_scts == NULL
829 || !PACKET_copy_bytes(pkt, s->tlsext_scts, size)) {
830 *al = SSL_AD_INTERNAL_ERROR;
835 if (custom_ext_parse(s, 0, TLSEXT_TYPE_signed_certificate_timestamp,
836 PACKET_data(pkt), PACKET_remaining(pkt), al) <= 0)
845 #ifndef OPENSSL_NO_NEXTPROTONEG
847 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
848 * elements of zero length are allowed and the set of elements must exactly
849 * fill the length of the block. Returns 1 on success or 0 on failure.
851 static int ssl_next_proto_validate(PACKET *pkt)
855 while (PACKET_remaining(pkt)) {
856 if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol)
857 || PACKET_remaining(&tmp_protocol) == 0)
864 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
866 unsigned char *selected;
867 unsigned char selected_len;
870 /* Check if we are in a renegotiation. If so ignore this extension */
871 if (s->s3->tmp.finish_md_len != 0)
874 /* We must have requested it. */
875 if (s->ctx->next_proto_select_cb == NULL) {
876 *al = SSL_AD_UNSUPPORTED_EXTENSION;
880 /* The data must be valid */
882 if (!ssl_next_proto_validate(&tmppkt)) {
883 *al = SSL_AD_DECODE_ERROR;
886 if (s->ctx->next_proto_select_cb(s, &selected, &selected_len,
888 PACKET_remaining(pkt),
889 s->ctx->next_proto_select_cb_arg) !=
891 *al = SSL_AD_INTERNAL_ERROR;
896 * Could be non-NULL if server has sent multiple NPN extensions in
897 * a single Serverhello
899 OPENSSL_free(s->next_proto_negotiated);
900 s->next_proto_negotiated = OPENSSL_malloc(selected_len);
901 if (s->next_proto_negotiated == NULL) {
902 *al = SSL_AD_INTERNAL_ERROR;
906 memcpy(s->next_proto_negotiated, selected, selected_len);
907 s->next_proto_negotiated_len = selected_len;
908 s->s3->next_proto_neg_seen = 1;
914 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
918 /* We must have requested it. */
919 if (!s->s3->alpn_sent) {
920 *al = SSL_AD_UNSUPPORTED_EXTENSION;
924 * The extension data consists of:
926 * uint8 proto_length;
927 * uint8 proto[proto_length];
929 if (!PACKET_get_net_2_len(pkt, &len)
930 || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len)
931 || PACKET_remaining(pkt) != len) {
932 *al = SSL_AD_DECODE_ERROR;
935 OPENSSL_free(s->s3->alpn_selected);
936 s->s3->alpn_selected = OPENSSL_malloc(len);
937 if (s->s3->alpn_selected == NULL) {
938 *al = SSL_AD_INTERNAL_ERROR;
941 if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) {
942 *al = SSL_AD_DECODE_ERROR;
945 s->s3->alpn_selected_len = len;
950 #ifndef OPENSSL_NO_SRTP
951 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
954 unsigned int id, ct, mki;
956 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
957 SRTP_PROTECTION_PROFILE *prof;
959 if (!PACKET_get_net_2(pkt, &ct) || ct != 2
960 || !PACKET_get_net_2(pkt, &id)
961 || !PACKET_get_1(pkt, &mki)
962 || PACKET_remaining(pkt) != 0) {
963 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
964 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
965 *al = SSL_AD_DECODE_ERROR;
970 /* Must be no MKI, since we never offer one */
971 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE);
972 *al = SSL_AD_ILLEGAL_PARAMETER;
976 /* Throw an error if the server gave us an unsolicited extension */
977 clnt = SSL_get_srtp_profiles(s);
979 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES);
980 *al = SSL_AD_DECODE_ERROR;
985 * Check to see if the server gave us something we support (and
986 * presumably offered)
988 for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) {
989 prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
991 if (prof->id == id) {
992 s->srtp_profile = prof;
998 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
999 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
1000 *al = SSL_AD_DECODE_ERROR;
1005 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
1007 /* Ignore if inappropriate ciphersuite */
1008 if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
1009 && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD
1010 && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4)
1011 s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC;
1016 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
1018 s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
1020 s->session->flags |= SSL_SESS_FLAG_EXTMS;
1025 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
1028 #ifndef OPENSSL_NO_TLS1_3
1029 unsigned int group_id;
1031 EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL;
1035 *al = SSL_AD_INTERNAL_ERROR;
1036 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1040 if (!PACKET_get_net_2(pkt, &group_id)) {
1041 *al = SSL_AD_HANDSHAKE_FAILURE;
1042 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
1046 if (group_id != s->s3->group_id) {
1048 * This isn't for the group that we sent in the original
1051 *al = SSL_AD_HANDSHAKE_FAILURE;
1052 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1056 if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt)
1057 || PACKET_remaining(&encoded_pt) == 0) {
1058 *al = SSL_AD_DECODE_ERROR;
1059 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
1063 skey = ssl_generate_pkey(ckey);
1065 *al = SSL_AD_INTERNAL_ERROR;
1066 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE);
1069 if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt),
1070 PACKET_remaining(&encoded_pt))) {
1071 *al = SSL_AD_DECODE_ERROR;
1072 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT);
1073 EVP_PKEY_free(skey);
1077 if (ssl_derive(s, ckey, skey, 1) == 0) {
1078 *al = SSL_AD_INTERNAL_ERROR;
1079 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1080 EVP_PKEY_free(skey);
1083 EVP_PKEY_free(skey);