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->ext.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->ext.hostname,
48 strlen(s->ext.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->ext.supportedgroups;
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->ext.tick != NULL) {
195 ticklen = s->session->ext.ticklen;
196 } else if (s->session && s->ext.session_ticket != NULL
197 && s->ext.session_ticket->data != NULL) {
198 ticklen = s->ext.session_ticket->length;
199 s->session->ext.tick = OPENSSL_malloc(ticklen);
200 if (s->session->ext.tick == NULL) {
201 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET,
202 ERR_R_INTERNAL_ERROR);
205 memcpy(s->session->ext.tick,
206 s->ext.session_ticket->data, ticklen);
207 s->session->ext.ticklen = ticklen;
212 if (ticklen == 0 && s->ext.session_ticket != NULL &&
213 s->ext.session_ticket->data == NULL)
216 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket)
217 || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.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 int *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->ext.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->ext.ocsp.ids); i++) {
273 unsigned char *idbytes;
274 OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.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->ext.ocsp.exts) {
292 unsigned char *extbytes;
293 int extlen = i2d_X509_EXTENSIONS(s->ext.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->ext.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->ext.npn_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->ext.alpn == 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->ext.alpn, s->ext.alpn_len)
355 || !WPACKET_close(pkt)) {
356 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR);
359 s->s3->alpn_sent = 1;
365 #ifndef OPENSSL_NO_SRTP
366 int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
369 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s);
375 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp)
376 /* Sub-packet for SRTP extension */
377 || !WPACKET_start_sub_packet_u16(pkt)
378 /* Sub-packet for the protection profile list */
379 || !WPACKET_start_sub_packet_u16(pkt)) {
380 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
384 end = sk_SRTP_PROTECTION_PROFILE_num(clnt);
385 for (i = 0; i < end; i++) {
386 const SRTP_PROTECTION_PROFILE *prof =
387 sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
389 if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) {
390 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
394 if (!WPACKET_close(pkt)
395 /* Add an empty use_mki value */
396 || !WPACKET_put_bytes_u8(pkt, 0)
397 || !WPACKET_close(pkt)) {
398 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
406 int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
409 if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
412 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac)
413 || !WPACKET_put_bytes_u16(pkt, 0)) {
414 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR);
421 #ifndef OPENSSL_NO_CT
422 int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
425 if (s->ct_validation_callback == NULL)
428 /* Not defined for client Certificates */
432 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp)
433 || !WPACKET_put_bytes_u16(pkt, 0)) {
434 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR);
442 int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
445 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
446 || !WPACKET_put_bytes_u16(pkt, 0)) {
447 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR);
454 int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, X509 *x,
455 size_t chainidx, int *al)
457 int currv, min_version, max_version, reason;
459 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions)
460 || !WPACKET_start_sub_packet_u16(pkt)
461 || !WPACKET_start_sub_packet_u8(pkt)) {
462 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
463 ERR_R_INTERNAL_ERROR);
467 reason = ssl_get_client_min_max_version(s, &min_version, &max_version);
469 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason);
474 * TODO(TLS1.3): There is some discussion on the TLS list as to wheter
475 * we should include versions <TLS1.2. For the moment we do. To be
478 for (currv = max_version; currv >= min_version; currv--) {
479 /* TODO(TLS1.3): Remove this first if clause prior to release!! */
480 if (currv == TLS1_3_VERSION) {
481 if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) {
482 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
483 ERR_R_INTERNAL_ERROR);
486 } else if (!WPACKET_put_bytes_u16(pkt, currv)) {
487 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
488 ERR_R_INTERNAL_ERROR);
492 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
493 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
494 ERR_R_INTERNAL_ERROR);
501 int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
504 #ifndef OPENSSL_NO_TLS1_3
505 size_t i, sharessent = 0, num_curves = 0;
506 const unsigned char *pcurves = NULL;
508 /* key_share extension */
509 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
510 /* Extension data sub-packet */
511 || !WPACKET_start_sub_packet_u16(pkt)
512 /* KeyShare list sub-packet */
513 || !WPACKET_start_sub_packet_u16(pkt)) {
514 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
518 pcurves = s->ext.supportedgroups;
519 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
520 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
525 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
528 for (i = 0; i < num_curves && sharessent < 1; i++, pcurves += 2) {
529 unsigned char *encodedPoint = NULL;
530 unsigned int curve_id = 0;
531 EVP_PKEY *key_share_key = NULL;
534 if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED))
537 if (s->s3->tmp.pkey != NULL) {
538 /* Shouldn't happen! */
539 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
543 /* Generate a key for this key_share */
544 curve_id = (pcurves[0] << 8) | pcurves[1];
545 key_share_key = ssl_generate_pkey_curve(curve_id);
546 if (key_share_key == NULL) {
547 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EVP_LIB);
551 /* Encode the public key. */
552 encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key,
554 if (encodedlen == 0) {
555 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EC_LIB);
556 EVP_PKEY_free(key_share_key);
560 /* Create KeyShareEntry */
561 if (!WPACKET_put_bytes_u16(pkt, curve_id)
562 || !WPACKET_sub_memcpy_u16(pkt, encodedPoint, encodedlen)) {
563 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
564 EVP_PKEY_free(key_share_key);
565 OPENSSL_free(encodedPoint);
570 * TODO(TLS1.3): When changing to send more than one key_share we're
571 * going to need to be able to save more than one EVP_PKEY. For now
572 * we reuse the existing tmp.pkey
574 s->s3->group_id = curve_id;
575 s->s3->tmp.pkey = key_share_key;
577 OPENSSL_free(encodedPoint);
580 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
581 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
589 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
590 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
592 int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, X509 *x, size_t chainidx,
595 unsigned char *padbytes;
598 if ((s->options & SSL_OP_TLSEXT_PADDING) == 0)
602 * Add padding to workaround bugs in F5 terminators. See
603 * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this
604 * code calculates the length of all existing extensions it MUST always
607 if (!WPACKET_get_total_written(pkt, &hlen)) {
608 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
612 if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) {
613 /* Calculate the amond of padding we need to add */
614 hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen;
617 * Take off the size of extension header itself (2 bytes for type and
618 * 2 bytes for length bytes)
625 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding)
626 || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) {
627 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
630 memset(padbytes, 0, hlen);
637 * Parse the server's renegotiation binding and abort if it's not right
639 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
642 size_t expected_len = s->s3->previous_client_finished_len
643 + s->s3->previous_server_finished_len;
645 const unsigned char *data;
647 /* Check for logic errors */
648 assert(expected_len == 0 || s->s3->previous_client_finished_len != 0);
649 assert(expected_len == 0 || s->s3->previous_server_finished_len != 0);
651 /* Parse the length byte */
652 if (!PACKET_get_1_len(pkt, &ilen)) {
653 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
654 SSL_R_RENEGOTIATION_ENCODING_ERR);
655 *al = SSL_AD_ILLEGAL_PARAMETER;
659 /* Consistency check */
660 if (PACKET_remaining(pkt) != ilen) {
661 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
662 SSL_R_RENEGOTIATION_ENCODING_ERR);
663 *al = SSL_AD_ILLEGAL_PARAMETER;
667 /* Check that the extension matches */
668 if (ilen != expected_len) {
669 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
670 SSL_R_RENEGOTIATION_MISMATCH);
671 *al = SSL_AD_HANDSHAKE_FAILURE;
675 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
676 || memcmp(data, s->s3->previous_client_finished,
677 s->s3->previous_client_finished_len) != 0) {
678 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
679 SSL_R_RENEGOTIATION_MISMATCH);
680 *al = SSL_AD_HANDSHAKE_FAILURE;
684 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
685 || memcmp(data, s->s3->previous_server_finished,
686 s->s3->previous_server_finished_len) != 0) {
687 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
688 SSL_R_RENEGOTIATION_MISMATCH);
689 *al = SSL_AD_ILLEGAL_PARAMETER;
692 s->s3->send_connection_binding = 1;
697 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
700 if (s->ext.hostname == NULL || PACKET_remaining(pkt) > 0) {
701 *al = SSL_AD_UNRECOGNIZED_NAME;
706 if (s->session->ext.hostname != NULL) {
707 *al = SSL_AD_INTERNAL_ERROR;
710 s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname);
711 if (s->session->ext.hostname == NULL) {
712 *al = SSL_AD_INTERNAL_ERROR;
720 #ifndef OPENSSL_NO_EC
721 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
724 unsigned int ecpointformats_len;
725 PACKET ecptformatlist;
727 if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) {
728 *al = SSL_AD_DECODE_ERROR;
732 ecpointformats_len = PACKET_remaining(&ecptformatlist);
733 s->session->ext.ecpointformats_len = 0;
735 OPENSSL_free(s->session->ext.ecpointformats);
736 s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len);
737 if (s->session->ext.ecpointformats == NULL) {
738 *al = SSL_AD_INTERNAL_ERROR;
742 s->session->ext.ecpointformats_len = ecpointformats_len;
744 if (!PACKET_copy_bytes(&ecptformatlist,
745 s->session->ext.ecpointformats,
746 ecpointformats_len)) {
747 *al = SSL_AD_INTERNAL_ERROR;
756 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
759 if (s->ext.session_ticket_cb != NULL &&
760 !s->ext.session_ticket_cb(s, PACKET_data(pkt),
761 PACKET_remaining(pkt),
762 s->ext.session_ticket_cb_arg)) {
763 *al = SSL_AD_INTERNAL_ERROR;
767 if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) {
768 *al = SSL_AD_UNSUPPORTED_EXTENSION;
772 s->ext.ticket_expected = 1;
777 #ifndef OPENSSL_NO_OCSP
778 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
782 * MUST only be sent if we've requested a status
783 * request message. In TLS <= 1.2 it must also be empty.
785 if (s->ext.status_type == TLSEXT_STATUSTYPE_nothing
786 || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0)) {
787 *al = SSL_AD_UNSUPPORTED_EXTENSION;
791 if (SSL_IS_TLS13(s)) {
792 /* We only know how to handle this if it's for the first Certificate in
793 * the chain. We ignore any other repsonses.
797 return tls_process_cert_status_body(s, pkt, al);
800 /* Set flag to expect CertificateStatus message */
801 s->ext.status_expected = 1;
808 #ifndef OPENSSL_NO_CT
809 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
812 * Only take it if we asked for it - i.e if there is no CT validation
813 * callback set, then a custom extension MAY be processing it, so we
814 * need to let control continue to flow to that.
816 if (s->ct_validation_callback != NULL) {
817 size_t size = PACKET_remaining(pkt);
819 /* Simply copy it off for later processing */
820 OPENSSL_free(s->ext.scts);
823 s->ext.scts_len = size;
825 s->ext.scts = OPENSSL_malloc(size);
826 if (s->ext.scts == NULL
827 || !PACKET_copy_bytes(pkt, s->ext.scts, size)) {
828 *al = SSL_AD_INTERNAL_ERROR;
833 if (custom_ext_parse(s, 0, TLSEXT_TYPE_signed_certificate_timestamp,
834 PACKET_data(pkt), PACKET_remaining(pkt), al) <= 0)
843 #ifndef OPENSSL_NO_NEXTPROTONEG
845 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
846 * elements of zero length are allowed and the set of elements must exactly
847 * fill the length of the block. Returns 1 on success or 0 on failure.
849 static int ssl_next_proto_validate(PACKET *pkt)
853 while (PACKET_remaining(pkt)) {
854 if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol)
855 || PACKET_remaining(&tmp_protocol) == 0)
862 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
864 unsigned char *selected;
865 unsigned char selected_len;
868 /* Check if we are in a renegotiation. If so ignore this extension */
869 if (s->s3->tmp.finish_md_len != 0)
872 /* We must have requested it. */
873 if (s->ctx->ext.npn_select_cb == NULL) {
874 *al = SSL_AD_UNSUPPORTED_EXTENSION;
878 /* The data must be valid */
880 if (!ssl_next_proto_validate(&tmppkt)) {
881 *al = SSL_AD_DECODE_ERROR;
884 if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len,
886 PACKET_remaining(pkt),
887 s->ctx->ext.npn_select_cb_arg) !=
889 *al = SSL_AD_INTERNAL_ERROR;
894 * Could be non-NULL if server has sent multiple NPN extensions in
895 * a single Serverhello
897 OPENSSL_free(s->ext.npn);
898 s->ext.npn = OPENSSL_malloc(selected_len);
899 if (s->ext.npn == NULL) {
900 *al = SSL_AD_INTERNAL_ERROR;
904 memcpy(s->ext.npn, selected, selected_len);
905 s->ext.npn_len = selected_len;
912 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
916 /* We must have requested it. */
917 if (!s->s3->alpn_sent) {
918 *al = SSL_AD_UNSUPPORTED_EXTENSION;
922 * The extension data consists of:
924 * uint8 proto_length;
925 * uint8 proto[proto_length];
927 if (!PACKET_get_net_2_len(pkt, &len)
928 || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len)
929 || PACKET_remaining(pkt) != len) {
930 *al = SSL_AD_DECODE_ERROR;
933 OPENSSL_free(s->s3->alpn_selected);
934 s->s3->alpn_selected = OPENSSL_malloc(len);
935 if (s->s3->alpn_selected == NULL) {
936 *al = SSL_AD_INTERNAL_ERROR;
939 if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) {
940 *al = SSL_AD_DECODE_ERROR;
943 s->s3->alpn_selected_len = len;
948 #ifndef OPENSSL_NO_SRTP
949 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
952 unsigned int id, ct, mki;
954 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
955 SRTP_PROTECTION_PROFILE *prof;
957 if (!PACKET_get_net_2(pkt, &ct) || ct != 2
958 || !PACKET_get_net_2(pkt, &id)
959 || !PACKET_get_1(pkt, &mki)
960 || PACKET_remaining(pkt) != 0) {
961 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
962 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
963 *al = SSL_AD_DECODE_ERROR;
968 /* Must be no MKI, since we never offer one */
969 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE);
970 *al = SSL_AD_ILLEGAL_PARAMETER;
974 /* Throw an error if the server gave us an unsolicited extension */
975 clnt = SSL_get_srtp_profiles(s);
977 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES);
978 *al = SSL_AD_DECODE_ERROR;
983 * Check to see if the server gave us something we support (and
984 * presumably offered)
986 for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) {
987 prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
989 if (prof->id == id) {
990 s->srtp_profile = prof;
996 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
997 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
998 *al = SSL_AD_DECODE_ERROR;
1003 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
1005 /* Ignore if inappropriate ciphersuite */
1006 if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
1007 && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD
1008 && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4)
1009 s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC;
1014 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, X509 *x, size_t chainidx, int *al)
1016 s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
1018 s->session->flags |= SSL_SESS_FLAG_EXTMS;
1023 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chainidx,
1026 #ifndef OPENSSL_NO_TLS1_3
1027 unsigned int group_id;
1029 EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL;
1033 *al = SSL_AD_INTERNAL_ERROR;
1034 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1038 if (!PACKET_get_net_2(pkt, &group_id)) {
1039 *al = SSL_AD_HANDSHAKE_FAILURE;
1040 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
1044 if (group_id != s->s3->group_id) {
1046 * This isn't for the group that we sent in the original
1049 *al = SSL_AD_HANDSHAKE_FAILURE;
1050 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1054 if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt)
1055 || PACKET_remaining(&encoded_pt) == 0) {
1056 *al = SSL_AD_DECODE_ERROR;
1057 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
1061 skey = ssl_generate_pkey(ckey);
1063 *al = SSL_AD_INTERNAL_ERROR;
1064 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE);
1067 if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt),
1068 PACKET_remaining(&encoded_pt))) {
1069 *al = SSL_AD_DECODE_ERROR;
1070 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT);
1071 EVP_PKEY_free(skey);
1075 if (ssl_derive(s, ckey, skey, 1) == 0) {
1076 *al = SSL_AD_INTERNAL_ERROR;
1077 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1078 EVP_PKEY_free(skey);
1081 EVP_PKEY_free(skey);