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, size_t chain,
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, size_t chain,
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 chain, int *al)
61 /* Add SRP username if there is one */
62 if (s->srp_ctx.login == NULL)
65 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp)
66 /* Sub-packet for SRP extension */
67 || !WPACKET_start_sub_packet_u16(pkt)
68 || !WPACKET_start_sub_packet_u8(pkt)
69 /* login must not be zero...internal error if so */
70 || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH)
71 || !WPACKET_memcpy(pkt, s->srp_ctx.login,
72 strlen(s->srp_ctx.login))
73 || !WPACKET_close(pkt)
74 || !WPACKET_close(pkt)) {
75 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR);
84 static int use_ecc(SSL *s)
87 unsigned long alg_k, alg_a;
88 STACK_OF(SSL_CIPHER) *cipher_stack = NULL;
90 /* See if we support any ECC ciphersuites */
91 if (s->version == SSL3_VERSION)
94 cipher_stack = SSL_get_ciphers(s);
95 end = sk_SSL_CIPHER_num(cipher_stack);
96 for (i = 0; i < end; i++) {
97 const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
99 alg_k = c->algorithm_mkey;
100 alg_a = c->algorithm_auth;
101 if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK))
102 || (alg_a & SSL_aECDSA)
103 || c->min_tls >= TLS1_3_VERSION)
110 int tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt, X509 *x,
111 size_t chain, int *al)
113 const unsigned char *pformats;
119 /* Add TLS extension ECPointFormats to the ClientHello message */
120 tls1_get_formatlist(s, &pformats, &num_formats);
122 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats)
123 /* Sub-packet for formats extension */
124 || !WPACKET_start_sub_packet_u16(pkt)
125 || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats)
126 || !WPACKET_close(pkt)) {
127 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
134 int tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt, X509 *x,
135 size_t chain, int *al)
137 const unsigned char *pcurves = NULL, *pcurvestmp;
138 size_t num_curves = 0, i;
144 * Add TLS extension supported_groups to the ClientHello message
146 /* TODO(TLS1.3): Add support for DHE groups */
147 pcurves = s->tlsext_supportedgroupslist;
148 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
149 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
150 ERR_R_INTERNAL_ERROR);
153 pcurvestmp = pcurves;
155 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups)
156 /* Sub-packet for supported_groups extension */
157 || !WPACKET_start_sub_packet_u16(pkt)
158 || !WPACKET_start_sub_packet_u16(pkt)) {
159 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
160 ERR_R_INTERNAL_ERROR);
163 /* Copy curve ID if supported */
164 for (i = 0; i < num_curves; i++, pcurvestmp += 2) {
165 if (tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) {
166 if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0])
167 || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) {
168 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
169 ERR_R_INTERNAL_ERROR);
174 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
175 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
176 ERR_R_INTERNAL_ERROR);
184 int tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt, X509 *x,
185 size_t chain, int *al)
189 if (!tls_use_ticket(s))
192 if (!s->new_session && s->session != NULL
193 && s->session->tlsext_tick != NULL) {
194 ticklen = s->session->tlsext_ticklen;
195 } else if (s->session && s->tlsext_session_ticket != NULL
196 && s->tlsext_session_ticket->data != NULL) {
197 ticklen = s->tlsext_session_ticket->length;
198 s->session->tlsext_tick = OPENSSL_malloc(ticklen);
199 if (s->session->tlsext_tick == NULL) {
200 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET,
201 ERR_R_INTERNAL_ERROR);
204 memcpy(s->session->tlsext_tick,
205 s->tlsext_session_ticket->data, ticklen);
206 s->session->tlsext_ticklen = ticklen;
211 if (ticklen == 0 && s->tlsext_session_ticket != NULL &&
212 s->tlsext_session_ticket->data == NULL)
215 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket)
216 || !WPACKET_sub_memcpy_u16(pkt, s->session->tlsext_tick, ticklen)) {
217 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
224 int tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt, X509 *x, size_t chain,
228 const unsigned char *salg;
230 if (!SSL_CLIENT_USE_SIGALGS(s))
233 salglen = tls12_get_psigalgs(s, &salg);
234 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms)
235 /* Sub-packet for sig-algs extension */
236 || !WPACKET_start_sub_packet_u16(pkt)
237 /* Sub-packet for the actual list */
238 || !WPACKET_start_sub_packet_u16(pkt)
239 || !tls12_copy_sigalgs(s, pkt, salg, salglen)
240 || !WPACKET_close(pkt)
241 || !WPACKET_close(pkt)) {
242 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR);
249 #ifndef OPENSSL_NO_OCSP
250 int tls_construct_ctos_status_request(SSL *s, WPACKET *pkt, X509 *x,
251 size_t chain, int *al)
255 /* This extension isn't defined for client Certificates */
259 if (s->tlsext_status_type != TLSEXT_STATUSTYPE_ocsp)
262 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request)
263 /* Sub-packet for status request extension */
264 || !WPACKET_start_sub_packet_u16(pkt)
265 || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp)
266 /* Sub-packet for the ids */
267 || !WPACKET_start_sub_packet_u16(pkt)) {
268 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
271 for (i = 0; i < sk_OCSP_RESPID_num(s->tlsext_ocsp_ids); i++) {
272 unsigned char *idbytes;
273 OCSP_RESPID *id = sk_OCSP_RESPID_value(s->tlsext_ocsp_ids, i);
274 int idlen = i2d_OCSP_RESPID(id, NULL);
277 /* Sub-packet for an individual id */
278 || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes)
279 || i2d_OCSP_RESPID(id, &idbytes) != idlen) {
280 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
281 ERR_R_INTERNAL_ERROR);
285 if (!WPACKET_close(pkt)
286 || !WPACKET_start_sub_packet_u16(pkt)) {
287 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
290 if (s->tlsext_ocsp_exts) {
291 unsigned char *extbytes;
292 int extlen = i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, NULL);
295 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
296 ERR_R_INTERNAL_ERROR);
299 if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes)
300 || i2d_X509_EXTENSIONS(s->tlsext_ocsp_exts, &extbytes)
302 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
303 ERR_R_INTERNAL_ERROR);
307 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
308 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
316 #ifndef OPENSSL_NO_NEXTPROTONEG
317 int tls_construct_ctos_npn(SSL *s, WPACKET *pkt, X509 *x, size_t chain, int *al)
319 if (s->ctx->next_proto_select_cb == NULL || s->s3->tmp.finish_md_len != 0)
323 * The client advertises an empty extension to indicate its support
324 * for Next Protocol Negotiation
326 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg)
327 || !WPACKET_put_bytes_u16(pkt, 0)) {
328 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR);
336 int tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, X509 *x, size_t chain,
339 s->s3->alpn_sent = 0;
342 * finish_md_len is non-zero during a renegotiation, so
343 * this avoids sending ALPN during the renegotiation
345 if (s->alpn_client_proto_list == NULL || s->s3->tmp.finish_md_len != 0)
348 if (!WPACKET_put_bytes_u16(pkt,
349 TLSEXT_TYPE_application_layer_protocol_negotiation)
350 /* Sub-packet ALPN extension */
351 || !WPACKET_start_sub_packet_u16(pkt)
352 || !WPACKET_sub_memcpy_u16(pkt, s->alpn_client_proto_list,
353 s->alpn_client_proto_list_len)
354 || !WPACKET_close(pkt)) {
355 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR);
358 s->s3->alpn_sent = 1;
364 #ifndef OPENSSL_NO_SRTP
365 int tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt, X509 *x, size_t chain,
368 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s);
374 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp)
375 /* Sub-packet for SRTP extension */
376 || !WPACKET_start_sub_packet_u16(pkt)
377 /* Sub-packet for the protection profile list */
378 || !WPACKET_start_sub_packet_u16(pkt)) {
379 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
383 end = sk_SRTP_PROTECTION_PROFILE_num(clnt);
384 for (i = 0; i < end; i++) {
385 const SRTP_PROTECTION_PROFILE *prof =
386 sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
388 if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) {
389 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
393 if (!WPACKET_close(pkt)
394 /* Add an empty use_mki value */
395 || !WPACKET_put_bytes_u8(pkt, 0)
396 || !WPACKET_close(pkt)) {
397 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
405 int tls_construct_ctos_etm(SSL *s, WPACKET *pkt, X509 *x, size_t chain, int *al)
407 if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
410 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac)
411 || !WPACKET_put_bytes_u16(pkt, 0)) {
412 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR);
419 #ifndef OPENSSL_NO_CT
420 int tls_construct_ctos_sct(SSL *s, WPACKET *pkt, X509 *x, size_t chain, int *al)
422 if (s->ct_validation_callback == NULL)
425 /* Not defined for client Certificates */
429 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp)
430 || !WPACKET_put_bytes_u16(pkt, 0)) {
431 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR);
439 int tls_construct_ctos_ems(SSL *s, WPACKET *pkt, X509 *x, size_t chain, int *al)
441 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
442 || !WPACKET_put_bytes_u16(pkt, 0)) {
443 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR);
450 int tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt, X509 *x,
451 size_t chain, int *al)
453 int currv, min_version, max_version, reason;
455 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions)
456 || !WPACKET_start_sub_packet_u16(pkt)
457 || !WPACKET_start_sub_packet_u8(pkt)) {
458 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
459 ERR_R_INTERNAL_ERROR);
463 reason = ssl_get_client_min_max_version(s, &min_version, &max_version);
465 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason);
470 * TODO(TLS1.3): There is some discussion on the TLS list as to wheter
471 * we should include versions <TLS1.2. For the moment we do. To be
474 for (currv = max_version; currv >= min_version; currv--) {
475 /* TODO(TLS1.3): Remove this first if clause prior to release!! */
476 if (currv == TLS1_3_VERSION) {
477 if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) {
478 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
479 ERR_R_INTERNAL_ERROR);
482 } else if (!WPACKET_put_bytes_u16(pkt, currv)) {
483 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
484 ERR_R_INTERNAL_ERROR);
488 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
489 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
490 ERR_R_INTERNAL_ERROR);
497 int tls_construct_ctos_key_share(SSL *s, WPACKET *pkt, X509 *x, size_t chain,
500 #ifndef OPENSSL_NO_TLS1_3
501 size_t i, sharessent = 0, num_curves = 0;
502 const unsigned char *pcurves = NULL;
504 /* key_share extension */
505 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
506 /* Extension data sub-packet */
507 || !WPACKET_start_sub_packet_u16(pkt)
508 /* KeyShare list sub-packet */
509 || !WPACKET_start_sub_packet_u16(pkt)) {
510 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
514 pcurves = s->tlsext_supportedgroupslist;
515 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
516 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
521 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
524 for (i = 0; i < num_curves && sharessent < 1; i++, pcurves += 2) {
525 unsigned char *encodedPoint = NULL;
526 unsigned int curve_id = 0;
527 EVP_PKEY *key_share_key = NULL;
530 if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED))
533 if (s->s3->tmp.pkey != NULL) {
534 /* Shouldn't happen! */
535 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
539 /* Generate a key for this key_share */
540 curve_id = (pcurves[0] << 8) | pcurves[1];
541 key_share_key = ssl_generate_pkey_curve(curve_id);
542 if (key_share_key == NULL) {
543 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EVP_LIB);
547 /* Encode the public key. */
548 encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key,
550 if (encodedlen == 0) {
551 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_EC_LIB);
552 EVP_PKEY_free(key_share_key);
556 /* Create KeyShareEntry */
557 if (!WPACKET_put_bytes_u16(pkt, curve_id)
558 || !WPACKET_sub_memcpy_u16(pkt, encodedPoint, encodedlen)) {
559 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
560 EVP_PKEY_free(key_share_key);
561 OPENSSL_free(encodedPoint);
566 * TODO(TLS1.3): When changing to send more than one key_share we're
567 * going to need to be able to save more than one EVP_PKEY. For now
568 * we reuse the existing tmp.pkey
570 s->s3->group_id = curve_id;
571 s->s3->tmp.pkey = key_share_key;
573 OPENSSL_free(encodedPoint);
576 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
577 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
585 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
586 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
588 int tls_construct_ctos_padding(SSL *s, WPACKET *pkt, X509 *x, size_t chain,
591 unsigned char *padbytes;
594 if ((s->options & SSL_OP_TLSEXT_PADDING) == 0)
598 * Add padding to workaround bugs in F5 terminators. See
599 * https://tools.ietf.org/html/draft-agl-tls-padding-03 NB: because this
600 * code calculates the length of all existing extensions it MUST always
603 if (!WPACKET_get_total_written(pkt, &hlen)) {
604 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
608 if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) {
609 /* Calculate the amond of padding we need to add */
610 hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen;
613 * Take off the size of extension header itself (2 bytes for type and
614 * 2 bytes for length bytes)
621 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding)
622 || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) {
623 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
626 memset(padbytes, 0, hlen);
633 * Parse the server's renegotiation binding and abort if it's not right
635 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, X509 *x, size_t chain,
638 size_t expected_len = s->s3->previous_client_finished_len
639 + s->s3->previous_server_finished_len;
641 const unsigned char *data;
643 /* Check for logic errors */
644 assert(expected_len == 0 || s->s3->previous_client_finished_len != 0);
645 assert(expected_len == 0 || s->s3->previous_server_finished_len != 0);
647 /* Parse the length byte */
648 if (!PACKET_get_1_len(pkt, &ilen)) {
649 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
650 SSL_R_RENEGOTIATION_ENCODING_ERR);
651 *al = SSL_AD_ILLEGAL_PARAMETER;
655 /* Consistency check */
656 if (PACKET_remaining(pkt) != ilen) {
657 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
658 SSL_R_RENEGOTIATION_ENCODING_ERR);
659 *al = SSL_AD_ILLEGAL_PARAMETER;
663 /* Check that the extension matches */
664 if (ilen != expected_len) {
665 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
666 SSL_R_RENEGOTIATION_MISMATCH);
667 *al = SSL_AD_HANDSHAKE_FAILURE;
671 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
672 || memcmp(data, s->s3->previous_client_finished,
673 s->s3->previous_client_finished_len) != 0) {
674 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
675 SSL_R_RENEGOTIATION_MISMATCH);
676 *al = SSL_AD_HANDSHAKE_FAILURE;
680 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
681 || memcmp(data, s->s3->previous_server_finished,
682 s->s3->previous_server_finished_len) != 0) {
683 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
684 SSL_R_RENEGOTIATION_MISMATCH);
685 *al = SSL_AD_ILLEGAL_PARAMETER;
688 s->s3->send_connection_binding = 1;
693 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, X509 *x, size_t chain,
696 if (s->tlsext_hostname == NULL || PACKET_remaining(pkt) > 0) {
697 *al = SSL_AD_UNRECOGNIZED_NAME;
702 if (s->session->tlsext_hostname != NULL) {
703 *al = SSL_AD_INTERNAL_ERROR;
706 s->session->tlsext_hostname = OPENSSL_strdup(s->tlsext_hostname);
707 if (s->session->tlsext_hostname == NULL) {
708 *al = SSL_AD_INTERNAL_ERROR;
716 #ifndef OPENSSL_NO_EC
717 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, X509 *x, size_t chain,
720 unsigned int ecpointformatlist_length;
721 PACKET ecptformatlist;
723 if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) {
724 *al = SSL_AD_DECODE_ERROR;
728 ecpointformatlist_length = PACKET_remaining(&ecptformatlist);
729 s->session->tlsext_ecpointformatlist_length = 0;
731 OPENSSL_free(s->session->tlsext_ecpointformatlist);
732 s->session->tlsext_ecpointformatlist =
733 OPENSSL_malloc(ecpointformatlist_length);
734 if (s->session->tlsext_ecpointformatlist == NULL) {
735 *al = SSL_AD_INTERNAL_ERROR;
739 s->session->tlsext_ecpointformatlist_length = ecpointformatlist_length;
741 if (!PACKET_copy_bytes(&ecptformatlist,
742 s->session->tlsext_ecpointformatlist,
743 ecpointformatlist_length)) {
744 *al = SSL_AD_INTERNAL_ERROR;
753 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, X509 *x, size_t chain,
756 if (s->tls_session_ticket_ext_cb != NULL &&
757 !s->tls_session_ticket_ext_cb(s, PACKET_data(pkt),
758 PACKET_remaining(pkt),
759 s->tls_session_ticket_ext_cb_arg)) {
760 *al = SSL_AD_INTERNAL_ERROR;
764 if (!tls_use_ticket(s) || PACKET_remaining(pkt) > 0) {
765 *al = SSL_AD_UNSUPPORTED_EXTENSION;
769 s->tlsext_ticket_expected = 1;
774 #ifndef OPENSSL_NO_OCSP
775 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, X509 *x, size_t chain,
779 * MUST only be sent if we've requested a status
780 * request message. In TLS <= 1.2 it must also be empty.
782 if (s->tlsext_status_type == TLSEXT_STATUSTYPE_nothing
783 || (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0)) {
784 *al = SSL_AD_UNSUPPORTED_EXTENSION;
788 if (SSL_IS_TLS13(s)) {
789 /* We only know how to handle this if it's for the first Certificate in
790 * the chain. We ignore any other repsonses.
794 return tls_process_cert_status_body(s, pkt, al);
797 /* Set flag to expect CertificateStatus message */
798 s->tlsext_status_expected = 1;
805 #ifndef OPENSSL_NO_CT
806 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al)
809 * Only take it if we asked for it - i.e if there is no CT validation
810 * callback set, then a custom extension MAY be processing it, so we
811 * need to let control continue to flow to that.
813 if (s->ct_validation_callback != NULL) {
814 size_t size = PACKET_remaining(pkt);
816 /* Simply copy it off for later processing */
817 OPENSSL_free(s->tlsext_scts);
818 s->tlsext_scts = NULL;
820 s->tlsext_scts_len = size;
822 s->tlsext_scts = OPENSSL_malloc(size);
823 if (s->tlsext_scts == NULL
824 || !PACKET_copy_bytes(pkt, s->tlsext_scts, size)) {
825 *al = SSL_AD_INTERNAL_ERROR;
830 if (custom_ext_parse(s, 0, TLSEXT_TYPE_signed_certificate_timestamp,
831 PACKET_data(pkt), PACKET_remaining(pkt), al) <= 0)
840 #ifndef OPENSSL_NO_NEXTPROTONEG
842 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
843 * elements of zero length are allowed and the set of elements must exactly
844 * fill the length of the block. Returns 1 on success or 0 on failure.
846 static int ssl_next_proto_validate(PACKET *pkt)
850 while (PACKET_remaining(pkt)) {
851 if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol)
852 || PACKET_remaining(&tmp_protocol) == 0)
859 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al)
861 unsigned char *selected;
862 unsigned char selected_len;
865 /* Check if we are in a renegotiation. If so ignore this extension */
866 if (s->s3->tmp.finish_md_len != 0)
869 /* We must have requested it. */
870 if (s->ctx->next_proto_select_cb == NULL) {
871 *al = SSL_AD_UNSUPPORTED_EXTENSION;
875 /* The data must be valid */
877 if (!ssl_next_proto_validate(&tmppkt)) {
878 *al = SSL_AD_DECODE_ERROR;
881 if (s->ctx->next_proto_select_cb(s, &selected, &selected_len,
883 PACKET_remaining(pkt),
884 s->ctx->next_proto_select_cb_arg) !=
886 *al = SSL_AD_INTERNAL_ERROR;
891 * Could be non-NULL if server has sent multiple NPN extensions in
892 * a single Serverhello
894 OPENSSL_free(s->next_proto_negotiated);
895 s->next_proto_negotiated = OPENSSL_malloc(selected_len);
896 if (s->next_proto_negotiated == NULL) {
897 *al = SSL_AD_INTERNAL_ERROR;
901 memcpy(s->next_proto_negotiated, selected, selected_len);
902 s->next_proto_negotiated_len = selected_len;
903 s->s3->next_proto_neg_seen = 1;
909 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al)
913 /* We must have requested it. */
914 if (!s->s3->alpn_sent) {
915 *al = SSL_AD_UNSUPPORTED_EXTENSION;
919 * The extension data consists of:
921 * uint8 proto_length;
922 * uint8 proto[proto_length];
924 if (!PACKET_get_net_2_len(pkt, &len)
925 || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len)
926 || PACKET_remaining(pkt) != len) {
927 *al = SSL_AD_DECODE_ERROR;
930 OPENSSL_free(s->s3->alpn_selected);
931 s->s3->alpn_selected = OPENSSL_malloc(len);
932 if (s->s3->alpn_selected == NULL) {
933 *al = SSL_AD_INTERNAL_ERROR;
936 if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) {
937 *al = SSL_AD_DECODE_ERROR;
940 s->s3->alpn_selected_len = len;
945 #ifndef OPENSSL_NO_SRTP
946 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al)
948 unsigned int id, ct, mki;
950 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
951 SRTP_PROTECTION_PROFILE *prof;
953 if (!PACKET_get_net_2(pkt, &ct) || ct != 2
954 || !PACKET_get_net_2(pkt, &id)
955 || !PACKET_get_1(pkt, &mki)
956 || PACKET_remaining(pkt) != 0) {
957 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
958 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
959 *al = SSL_AD_DECODE_ERROR;
964 /* Must be no MKI, since we never offer one */
965 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE);
966 *al = SSL_AD_ILLEGAL_PARAMETER;
970 /* Throw an error if the server gave us an unsolicited extension */
971 clnt = SSL_get_srtp_profiles(s);
973 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES);
974 *al = SSL_AD_DECODE_ERROR;
979 * Check to see if the server gave us something we support (and
980 * presumably offered)
982 for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) {
983 prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
985 if (prof->id == id) {
986 s->srtp_profile = prof;
992 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
993 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
994 *al = SSL_AD_DECODE_ERROR;
999 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al)
1001 /* Ignore if inappropriate ciphersuite */
1002 if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
1003 && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD
1004 && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4)
1005 s->s3->flags |= TLS1_FLAGS_ENCRYPT_THEN_MAC;
1010 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, X509 *x, size_t chain, int *al)
1012 s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
1014 s->session->flags |= SSL_SESS_FLAG_EXTMS;
1019 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, X509 *x, size_t chain,
1022 #ifndef OPENSSL_NO_TLS1_3
1023 unsigned int group_id;
1025 EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL;
1029 *al = SSL_AD_INTERNAL_ERROR;
1030 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1034 if (!PACKET_get_net_2(pkt, &group_id)) {
1035 *al = SSL_AD_HANDSHAKE_FAILURE;
1036 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
1040 if (group_id != s->s3->group_id) {
1042 * This isn't for the group that we sent in the original
1045 *al = SSL_AD_HANDSHAKE_FAILURE;
1046 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1050 if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt)
1051 || PACKET_remaining(&encoded_pt) == 0) {
1052 *al = SSL_AD_DECODE_ERROR;
1053 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
1057 skey = ssl_generate_pkey(ckey);
1059 *al = SSL_AD_INTERNAL_ERROR;
1060 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE);
1063 if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt),
1064 PACKET_remaining(&encoded_pt))) {
1065 *al = SSL_AD_DECODE_ERROR;
1066 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT);
1067 EVP_PKEY_free(skey);
1071 if (ssl_derive(s, ckey, skey, 1) == 0) {
1072 *al = SSL_AD_INTERNAL_ERROR;
1073 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1074 EVP_PKEY_free(skey);
1077 EVP_PKEY_free(skey);