2 * Copyright 2016-2017 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 EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt,
16 unsigned int context, X509 *x,
17 size_t chainidx, int *al)
19 /* Add RI if renegotiating */
21 return EXT_RETURN_NOT_SENT;
23 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_renegotiate)
24 || !WPACKET_start_sub_packet_u16(pkt)
25 || !WPACKET_sub_memcpy_u8(pkt, s->s3->previous_client_finished,
26 s->s3->previous_client_finished_len)
27 || !WPACKET_close(pkt)) {
28 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE, ERR_R_INTERNAL_ERROR);
29 return EXT_RETURN_FAIL;
32 return EXT_RETURN_SENT;
35 EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt,
36 unsigned int context, X509 *x,
37 size_t chainidx, int *al)
39 if (s->ext.hostname == NULL)
40 return EXT_RETURN_NOT_SENT;
42 /* Add TLS extension servername to the Client Hello message */
43 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name)
44 /* Sub-packet for server_name extension */
45 || !WPACKET_start_sub_packet_u16(pkt)
46 /* Sub-packet for servername list (always 1 hostname)*/
47 || !WPACKET_start_sub_packet_u16(pkt)
48 || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name)
49 || !WPACKET_sub_memcpy_u16(pkt, s->ext.hostname,
50 strlen(s->ext.hostname))
51 || !WPACKET_close(pkt)
52 || !WPACKET_close(pkt)) {
53 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME, ERR_R_INTERNAL_ERROR);
54 return EXT_RETURN_FAIL;
57 return EXT_RETURN_SENT;
60 #ifndef OPENSSL_NO_SRP
61 EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context,
62 X509 *x, size_t chainidx, int *al)
64 /* Add SRP username if there is one */
65 if (s->srp_ctx.login == NULL)
66 return EXT_RETURN_NOT_SENT;
68 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp)
69 /* Sub-packet for SRP extension */
70 || !WPACKET_start_sub_packet_u16(pkt)
71 || !WPACKET_start_sub_packet_u8(pkt)
72 /* login must not be zero...internal error if so */
73 || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH)
74 || !WPACKET_memcpy(pkt, s->srp_ctx.login,
75 strlen(s->srp_ctx.login))
76 || !WPACKET_close(pkt)
77 || !WPACKET_close(pkt)) {
78 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP, ERR_R_INTERNAL_ERROR);
79 return EXT_RETURN_FAIL;
82 return EXT_RETURN_SENT;
87 static int use_ecc(SSL *s)
90 unsigned long alg_k, alg_a;
91 STACK_OF(SSL_CIPHER) *cipher_stack = NULL;
93 /* See if we support any ECC ciphersuites */
94 if (s->version == SSL3_VERSION)
97 cipher_stack = SSL_get_ciphers(s);
98 end = sk_SSL_CIPHER_num(cipher_stack);
99 for (i = 0; i < end; i++) {
100 const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
102 alg_k = c->algorithm_mkey;
103 alg_a = c->algorithm_auth;
104 if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK))
105 || (alg_a & SSL_aECDSA)
106 || c->min_tls >= TLS1_3_VERSION)
113 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
114 unsigned int context, X509 *x,
115 size_t chainidx, int *al)
117 const unsigned char *pformats;
121 return EXT_RETURN_NOT_SENT;
123 /* Add TLS extension ECPointFormats to the ClientHello message */
124 tls1_get_formatlist(s, &pformats, &num_formats);
126 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats)
127 /* Sub-packet for formats extension */
128 || !WPACKET_start_sub_packet_u16(pkt)
129 || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats)
130 || !WPACKET_close(pkt)) {
131 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
132 return EXT_RETURN_FAIL;
135 return EXT_RETURN_SENT;
138 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
139 unsigned int context, X509 *x,
140 size_t chainidx, int *al)
142 const unsigned char *pcurves = NULL, *pcurvestmp;
143 size_t num_curves = 0, i;
146 return EXT_RETURN_NOT_SENT;
149 * Add TLS extension supported_groups to the ClientHello message
151 /* TODO(TLS1.3): Add support for DHE groups */
152 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
153 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
154 ERR_R_INTERNAL_ERROR);
155 return EXT_RETURN_FAIL;
157 pcurvestmp = pcurves;
159 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups)
160 /* Sub-packet for supported_groups extension */
161 || !WPACKET_start_sub_packet_u16(pkt)
162 || !WPACKET_start_sub_packet_u16(pkt)) {
163 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
164 ERR_R_INTERNAL_ERROR);
165 return EXT_RETURN_FAIL;
167 /* Copy curve ID if supported */
168 for (i = 0; i < num_curves; i++, pcurvestmp += 2) {
169 if (tls_curve_allowed(s, pcurvestmp, SSL_SECOP_CURVE_SUPPORTED)) {
170 if (!WPACKET_put_bytes_u8(pkt, pcurvestmp[0])
171 || !WPACKET_put_bytes_u8(pkt, pcurvestmp[1])) {
172 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
173 ERR_R_INTERNAL_ERROR);
174 return EXT_RETURN_FAIL;
178 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
179 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
180 ERR_R_INTERNAL_ERROR);
181 return EXT_RETURN_FAIL;
184 return EXT_RETURN_SENT;
188 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
189 unsigned int context, X509 *x,
190 size_t chainidx, int *al)
194 if (!tls_use_ticket(s))
195 return EXT_RETURN_NOT_SENT;
197 if (!s->new_session && s->session != NULL
198 && s->session->ext.tick != NULL
199 && s->session->ssl_version != TLS1_3_VERSION) {
200 ticklen = s->session->ext.ticklen;
201 } else if (s->session && s->ext.session_ticket != NULL
202 && s->ext.session_ticket->data != NULL) {
203 ticklen = s->ext.session_ticket->length;
204 s->session->ext.tick = OPENSSL_malloc(ticklen);
205 if (s->session->ext.tick == NULL) {
206 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET,
207 ERR_R_INTERNAL_ERROR);
208 return EXT_RETURN_FAIL;
210 memcpy(s->session->ext.tick,
211 s->ext.session_ticket->data, ticklen);
212 s->session->ext.ticklen = ticklen;
217 if (ticklen == 0 && s->ext.session_ticket != NULL &&
218 s->ext.session_ticket->data == NULL)
219 return EXT_RETURN_NOT_SENT;
221 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket)
222 || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) {
223 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
224 return EXT_RETURN_FAIL;
227 return EXT_RETURN_SENT;
230 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
231 unsigned int context, X509 *x,
232 size_t chainidx, int *al)
235 const uint16_t *salg;
237 if (!SSL_CLIENT_USE_SIGALGS(s))
238 return EXT_RETURN_NOT_SENT;
240 salglen = tls12_get_psigalgs(s, 1, &salg);
241 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms)
242 /* Sub-packet for sig-algs extension */
243 || !WPACKET_start_sub_packet_u16(pkt)
244 /* Sub-packet for the actual list */
245 || !WPACKET_start_sub_packet_u16(pkt)
246 || !tls12_copy_sigalgs(s, pkt, salg, salglen)
247 || !WPACKET_close(pkt)
248 || !WPACKET_close(pkt)) {
249 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS, ERR_R_INTERNAL_ERROR);
250 return EXT_RETURN_FAIL;
253 return EXT_RETURN_SENT;
256 #ifndef OPENSSL_NO_OCSP
257 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
258 unsigned int context, X509 *x,
259 size_t chainidx, int *al)
263 /* This extension isn't defined for client Certificates */
265 return EXT_RETURN_NOT_SENT;
267 if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp)
268 return EXT_RETURN_NOT_SENT;
270 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request)
271 /* Sub-packet for status request extension */
272 || !WPACKET_start_sub_packet_u16(pkt)
273 || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp)
274 /* Sub-packet for the ids */
275 || !WPACKET_start_sub_packet_u16(pkt)) {
276 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
277 return EXT_RETURN_FAIL;
279 for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) {
280 unsigned char *idbytes;
281 OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i);
282 int idlen = i2d_OCSP_RESPID(id, NULL);
285 /* Sub-packet for an individual id */
286 || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes)
287 || i2d_OCSP_RESPID(id, &idbytes) != idlen) {
288 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
289 ERR_R_INTERNAL_ERROR);
290 return EXT_RETURN_FAIL;
293 if (!WPACKET_close(pkt)
294 || !WPACKET_start_sub_packet_u16(pkt)) {
295 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
296 return EXT_RETURN_FAIL;
298 if (s->ext.ocsp.exts) {
299 unsigned char *extbytes;
300 int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL);
303 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
304 ERR_R_INTERNAL_ERROR);
305 return EXT_RETURN_FAIL;
307 if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes)
308 || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes)
310 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
311 ERR_R_INTERNAL_ERROR);
312 return EXT_RETURN_FAIL;
315 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
316 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
317 return EXT_RETURN_FAIL;
320 return EXT_RETURN_SENT;
324 #ifndef OPENSSL_NO_NEXTPROTONEG
325 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
326 X509 *x, size_t chainidx, int *al)
328 if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s))
329 return EXT_RETURN_NOT_SENT;
332 * The client advertises an empty extension to indicate its support
333 * for Next Protocol Negotiation
335 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg)
336 || !WPACKET_put_bytes_u16(pkt, 0)) {
337 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN, ERR_R_INTERNAL_ERROR);
338 return EXT_RETURN_FAIL;
341 return EXT_RETURN_SENT;
345 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
346 X509 *x, size_t chainidx, int *al)
348 s->s3->alpn_sent = 0;
350 if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s))
351 return EXT_RETURN_NOT_SENT;
353 if (!WPACKET_put_bytes_u16(pkt,
354 TLSEXT_TYPE_application_layer_protocol_negotiation)
355 /* Sub-packet ALPN extension */
356 || !WPACKET_start_sub_packet_u16(pkt)
357 || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len)
358 || !WPACKET_close(pkt)) {
359 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN, ERR_R_INTERNAL_ERROR);
360 return EXT_RETURN_FAIL;
362 s->s3->alpn_sent = 1;
364 return EXT_RETURN_SENT;
368 #ifndef OPENSSL_NO_SRTP
369 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt,
370 unsigned int context, X509 *x,
371 size_t chainidx, int *al)
373 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s);
377 return EXT_RETURN_NOT_SENT;
379 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp)
380 /* Sub-packet for SRTP extension */
381 || !WPACKET_start_sub_packet_u16(pkt)
382 /* Sub-packet for the protection profile list */
383 || !WPACKET_start_sub_packet_u16(pkt)) {
384 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
385 return EXT_RETURN_FAIL;
388 end = sk_SRTP_PROTECTION_PROFILE_num(clnt);
389 for (i = 0; i < end; i++) {
390 const SRTP_PROTECTION_PROFILE *prof =
391 sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
393 if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) {
394 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
395 return EXT_RETURN_FAIL;
398 if (!WPACKET_close(pkt)
399 /* Add an empty use_mki value */
400 || !WPACKET_put_bytes_u8(pkt, 0)
401 || !WPACKET_close(pkt)) {
402 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
403 return EXT_RETURN_FAIL;
406 return EXT_RETURN_SENT;
410 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
411 X509 *x, size_t chainidx, int *al)
413 if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
414 return EXT_RETURN_NOT_SENT;
416 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac)
417 || !WPACKET_put_bytes_u16(pkt, 0)) {
418 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM, ERR_R_INTERNAL_ERROR);
419 return EXT_RETURN_FAIL;
422 return EXT_RETURN_SENT;
425 #ifndef OPENSSL_NO_CT
426 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
427 X509 *x, size_t chainidx, int *al)
429 if (s->ct_validation_callback == NULL)
430 return EXT_RETURN_NOT_SENT;
432 /* Not defined for client Certificates */
434 return EXT_RETURN_NOT_SENT;
436 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp)
437 || !WPACKET_put_bytes_u16(pkt, 0)) {
438 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT, ERR_R_INTERNAL_ERROR);
439 return EXT_RETURN_FAIL;
442 return EXT_RETURN_SENT;
446 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
447 X509 *x, size_t chainidx, int *al)
449 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
450 || !WPACKET_put_bytes_u16(pkt, 0)) {
451 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS, ERR_R_INTERNAL_ERROR);
452 return EXT_RETURN_FAIL;
455 return EXT_RETURN_SENT;
458 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
459 unsigned int context, X509 *x,
460 size_t chainidx, int *al)
462 int currv, min_version, max_version, reason;
464 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions)
465 || !WPACKET_start_sub_packet_u16(pkt)
466 || !WPACKET_start_sub_packet_u8(pkt)) {
467 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
468 ERR_R_INTERNAL_ERROR);
469 return EXT_RETURN_FAIL;
472 reason = ssl_get_min_max_version(s, &min_version, &max_version);
474 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason);
475 return EXT_RETURN_FAIL;
479 * TODO(TLS1.3): There is some discussion on the TLS list as to whether
480 * we should include versions <TLS1.2. For the moment we do. To be
483 for (currv = max_version; currv >= min_version; currv--) {
484 /* TODO(TLS1.3): Remove this first if clause prior to release!! */
485 if (currv == TLS1_3_VERSION) {
486 if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)) {
487 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
488 ERR_R_INTERNAL_ERROR);
489 return EXT_RETURN_FAIL;
491 } else if (!WPACKET_put_bytes_u16(pkt, currv)) {
492 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
493 ERR_R_INTERNAL_ERROR);
494 return EXT_RETURN_FAIL;
497 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
498 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
499 ERR_R_INTERNAL_ERROR);
500 return EXT_RETURN_FAIL;
503 return EXT_RETURN_SENT;
507 * Construct a psk_kex_modes extension. We only have two modes we know about
508 * at this stage, so we send both.
510 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
511 unsigned int context, X509 *x,
512 size_t chainidx, int *al)
514 #ifndef OPENSSL_NO_TLS1_3
516 * TODO(TLS1.3): Do we want this list to be configurable? For now we always
517 * just send both supported modes
519 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes)
520 || !WPACKET_start_sub_packet_u16(pkt)
521 || !WPACKET_start_sub_packet_u8(pkt)
522 || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE)
523 || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE)
524 || !WPACKET_close(pkt)
525 || !WPACKET_close(pkt)) {
526 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR);
527 return EXT_RETURN_FAIL;
530 s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE | TLSEXT_KEX_MODE_FLAG_KE_DHE;
533 return EXT_RETURN_SENT;
536 #ifndef OPENSSL_NO_TLS1_3
537 static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id)
539 unsigned char *encoded_point = NULL;
540 EVP_PKEY *key_share_key = NULL;
543 if (s->s3->tmp.pkey != NULL) {
544 assert(s->hello_retry_request);
545 if (!s->hello_retry_request) {
546 SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_INTERNAL_ERROR);
550 * Could happen if we got an HRR that wasn't requesting a new key_share
552 key_share_key = s->s3->tmp.pkey;
554 key_share_key = ssl_generate_pkey_curve(curve_id);
555 if (key_share_key == NULL) {
556 SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_EVP_LIB);
561 /* Encode the public key. */
562 encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key,
564 if (encodedlen == 0) {
565 SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_EC_LIB);
569 /* Create KeyShareEntry */
570 if (!WPACKET_put_bytes_u16(pkt, curve_id)
571 || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) {
572 SSLerr(SSL_F_ADD_KEY_SHARE, ERR_R_INTERNAL_ERROR);
577 * TODO(TLS1.3): When changing to send more than one key_share we're
578 * going to need to be able to save more than one EVP_PKEY. For now
579 * we reuse the existing tmp.pkey
581 s->s3->tmp.pkey = key_share_key;
582 s->s3->group_id = curve_id;
583 OPENSSL_free(encoded_point);
587 if (s->s3->tmp.pkey == NULL)
588 EVP_PKEY_free(key_share_key);
589 OPENSSL_free(encoded_point);
594 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
595 unsigned int context, X509 *x,
596 size_t chainidx, int *al)
598 #ifndef OPENSSL_NO_TLS1_3
599 size_t i, num_curves = 0;
600 const unsigned char *pcurves = NULL;
601 unsigned int curve_id = 0;
603 /* key_share extension */
604 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
605 /* Extension data sub-packet */
606 || !WPACKET_start_sub_packet_u16(pkt)
607 /* KeyShare list sub-packet */
608 || !WPACKET_start_sub_packet_u16(pkt)) {
609 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
610 return EXT_RETURN_FAIL;
613 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
614 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
615 return EXT_RETURN_FAIL;
619 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
622 if (s->s3->group_id != 0) {
623 curve_id = s->s3->group_id;
625 for (i = 0; i < num_curves; i++, pcurves += 2) {
627 if (!tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED))
630 curve_id = bytestogroup(pcurves);
636 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE);
637 return EXT_RETURN_FAIL;
640 if (!add_key_share(s, pkt, curve_id))
641 return EXT_RETURN_FAIL;
643 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
644 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE, ERR_R_INTERNAL_ERROR);
645 return EXT_RETURN_FAIL;
649 return EXT_RETURN_SENT;
652 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
653 X509 *x, size_t chainidx, int *al)
655 EXT_RETURN ret = EXT_RETURN_FAIL;
657 /* Should only be set if we've had an HRR */
658 if (s->ext.tls13_cookie_len == 0)
659 return EXT_RETURN_NOT_SENT;
661 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie)
662 /* Extension data sub-packet */
663 || !WPACKET_start_sub_packet_u16(pkt)
664 || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie,
665 s->ext.tls13_cookie_len)
666 || !WPACKET_close(pkt)) {
667 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_COOKIE, ERR_R_INTERNAL_ERROR);
671 ret = EXT_RETURN_SENT;
673 OPENSSL_free(s->ext.tls13_cookie);
674 s->ext.tls13_cookie = NULL;
675 s->ext.tls13_cookie_len = 0;
680 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
681 unsigned int context, X509 *x,
682 size_t chainidx, int *al)
684 if (s->early_data_state != SSL_EARLY_DATA_CONNECTING
685 || s->session->ext.max_early_data == 0) {
686 s->max_early_data = 0;
687 return EXT_RETURN_NOT_SENT;
689 s->max_early_data = s->session->ext.max_early_data;
691 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data)
692 || !WPACKET_start_sub_packet_u16(pkt)
693 || !WPACKET_close(pkt)) {
694 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR);
695 return EXT_RETURN_FAIL;
699 * We set this to rejected here. Later, if the server acknowledges the
700 * extension, we set it to accepted.
702 s->ext.early_data = SSL_EARLY_DATA_REJECTED;
704 return EXT_RETURN_SENT;
707 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
708 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
711 * PSK pre binder overhead =
712 * 2 bytes for TLSEXT_TYPE_psk
713 * 2 bytes for extension length
714 * 2 bytes for identities list length
715 * 2 bytes for identity length
716 * 4 bytes for obfuscated_ticket_age
717 * 2 bytes for binder list length
718 * 1 byte for binder length
719 * The above excludes the number of bytes for the identity itself and the
720 * subsequent binder bytes
722 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
724 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
725 unsigned int context, X509 *x,
726 size_t chainidx, int *al)
728 unsigned char *padbytes;
731 if ((s->options & SSL_OP_TLSEXT_PADDING) == 0)
732 return EXT_RETURN_NOT_SENT;
735 * Add padding to workaround bugs in F5 terminators. See RFC7685.
736 * This code calculates the length of all extensions added so far but
737 * excludes the PSK extension (because that MUST be written last). Therefore
738 * this extension MUST always appear second to last.
740 if (!WPACKET_get_total_written(pkt, &hlen)) {
741 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
742 return EXT_RETURN_FAIL;
746 * If we're going to send a PSK then that will be written out after this
747 * extension, so we need to calculate how long it is going to be.
749 if (s->session->ssl_version == TLS1_3_VERSION
750 && s->session->ext.ticklen != 0
751 && s->session->cipher != NULL) {
752 const EVP_MD *md = ssl_md(s->session->cipher->algorithm2);
756 * Add the fixed PSK overhead, the identity length and the binder
759 hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen
764 if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) {
765 /* Calculate the amount of padding we need to add */
766 hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen;
769 * Take off the size of extension header itself (2 bytes for type and
770 * 2 bytes for length bytes)
777 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding)
778 || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) {
779 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING, ERR_R_INTERNAL_ERROR);
782 memset(padbytes, 0, hlen);
785 return EXT_RETURN_SENT;
789 * Construct the pre_shared_key extension
791 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
792 X509 *x, size_t chainidx, int *al)
794 #ifndef OPENSSL_NO_TLS1_3
795 uint32_t now, agesec, agems;
796 size_t hashsize, binderoffset, msglen;
797 unsigned char *binder = NULL, *msgstart = NULL;
799 EXT_RETURN ret = EXT_RETURN_FAIL;
801 s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY;
804 * Note: At this stage of the code we only support adding a single
805 * resumption PSK. If we add support for multiple PSKs then the length
806 * calculations in the padding extension will need to be adjusted.
810 * If this is an incompatible or new session then we have nothing to resume
811 * so don't add this extension.
813 if (s->session->ssl_version != TLS1_3_VERSION
814 || s->session->ext.ticklen == 0)
815 return EXT_RETURN_NOT_SENT;
817 if (s->session->cipher == NULL) {
818 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
822 md = ssl_md(s->session->cipher->algorithm2);
824 /* Don't recognize this cipher so we can't use the session. Ignore it */
825 return EXT_RETURN_NOT_SENT;
828 if (s->hello_retry_request && md != ssl_handshake_md(s)) {
830 * Selected ciphersuite hash does not match the hash for the session so
833 return EXT_RETURN_NOT_SENT;
837 * Technically the C standard just says time() returns a time_t and says
838 * nothing about the encoding of that type. In practice most implementations
839 * follow POSIX which holds it as an integral type in seconds since epoch.
840 * We've already made the assumption that we can do this in multiple places
841 * in the code, so portability shouldn't be an issue.
843 now = (uint32_t)time(NULL);
844 agesec = now - (uint32_t)s->session->time;
846 if (s->session->ext.tick_lifetime_hint < agesec) {
847 /* Ticket is too old. Ignore it. */
848 return EXT_RETURN_NOT_SENT;
852 * Calculate age in ms. We're just doing it to nearest second. Should be
855 agems = agesec * (uint32_t)1000;
857 if (agesec != 0 && agems / (uint32_t)1000 != agesec) {
859 * Overflow. Shouldn't happen unless this is a *really* old session. If
860 * so we just ignore it.
862 return EXT_RETURN_NOT_SENT;
866 * Obfuscate the age. Overflow here is fine, this addition is supposed to
869 agems += s->session->ext.tick_age_add;
871 hashsize = EVP_MD_size(md);
873 /* Create the extension, but skip over the binder for now */
874 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk)
875 || !WPACKET_start_sub_packet_u16(pkt)
876 || !WPACKET_start_sub_packet_u16(pkt)
877 || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick,
878 s->session->ext.ticklen)
879 || !WPACKET_put_bytes_u32(pkt, agems)
880 || !WPACKET_close(pkt)
881 || !WPACKET_get_total_written(pkt, &binderoffset)
882 || !WPACKET_start_sub_packet_u16(pkt)
883 || !WPACKET_sub_allocate_bytes_u8(pkt, hashsize, &binder)
884 || !WPACKET_close(pkt)
885 || !WPACKET_close(pkt)
886 || !WPACKET_get_total_written(pkt, &msglen)
888 * We need to fill in all the sub-packet lengths now so we can
889 * calculate the HMAC of the message up to the binders
891 || !WPACKET_fill_lengths(pkt)) {
892 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
896 msgstart = WPACKET_get_curr(pkt) - msglen;
898 if (tls_psk_do_binder(s, md, msgstart, binderoffset, NULL, binder,
899 s->session, 1) != 1) {
900 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK, ERR_R_INTERNAL_ERROR);
904 s->session->ext.tick_identity = 0;
906 ret = EXT_RETURN_SENT;
915 * Parse the server's renegotiation binding and abort if it's not right
917 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
918 X509 *x, size_t chainidx, int *al)
920 size_t expected_len = s->s3->previous_client_finished_len
921 + s->s3->previous_server_finished_len;
923 const unsigned char *data;
925 /* Check for logic errors */
926 assert(expected_len == 0 || s->s3->previous_client_finished_len != 0);
927 assert(expected_len == 0 || s->s3->previous_server_finished_len != 0);
929 /* Parse the length byte */
930 if (!PACKET_get_1_len(pkt, &ilen)) {
931 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
932 SSL_R_RENEGOTIATION_ENCODING_ERR);
933 *al = SSL_AD_DECODE_ERROR;
937 /* Consistency check */
938 if (PACKET_remaining(pkt) != ilen) {
939 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
940 SSL_R_RENEGOTIATION_ENCODING_ERR);
941 *al = SSL_AD_DECODE_ERROR;
945 /* Check that the extension matches */
946 if (ilen != expected_len) {
947 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
948 SSL_R_RENEGOTIATION_MISMATCH);
949 *al = SSL_AD_ILLEGAL_PARAMETER;
953 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
954 || memcmp(data, s->s3->previous_client_finished,
955 s->s3->previous_client_finished_len) != 0) {
956 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
957 SSL_R_RENEGOTIATION_MISMATCH);
958 *al = SSL_AD_ILLEGAL_PARAMETER;
962 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
963 || memcmp(data, s->s3->previous_server_finished,
964 s->s3->previous_server_finished_len) != 0) {
965 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
966 SSL_R_RENEGOTIATION_MISMATCH);
967 *al = SSL_AD_ILLEGAL_PARAMETER;
970 s->s3->send_connection_binding = 1;
975 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
976 X509 *x, size_t chainidx, int *al)
978 if (s->ext.hostname == NULL) {
979 *al = SSL_AD_INTERNAL_ERROR;
983 if (PACKET_remaining(pkt) > 0) {
984 *al = SSL_AD_DECODE_ERROR;
989 if (s->session->ext.hostname != NULL) {
990 *al = SSL_AD_INTERNAL_ERROR;
993 s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname);
994 if (s->session->ext.hostname == NULL) {
995 *al = SSL_AD_INTERNAL_ERROR;
1003 #ifndef OPENSSL_NO_EC
1004 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
1005 X509 *x, size_t chainidx, int *al)
1007 unsigned int ecpointformats_len;
1008 PACKET ecptformatlist;
1010 if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) {
1011 *al = SSL_AD_DECODE_ERROR;
1015 ecpointformats_len = PACKET_remaining(&ecptformatlist);
1016 s->session->ext.ecpointformats_len = 0;
1018 OPENSSL_free(s->session->ext.ecpointformats);
1019 s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len);
1020 if (s->session->ext.ecpointformats == NULL) {
1021 *al = SSL_AD_INTERNAL_ERROR;
1025 s->session->ext.ecpointformats_len = ecpointformats_len;
1027 if (!PACKET_copy_bytes(&ecptformatlist,
1028 s->session->ext.ecpointformats,
1029 ecpointformats_len)) {
1030 *al = SSL_AD_INTERNAL_ERROR;
1039 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
1040 X509 *x, size_t chainidx, int *al)
1042 if (s->ext.session_ticket_cb != NULL &&
1043 !s->ext.session_ticket_cb(s, PACKET_data(pkt),
1044 PACKET_remaining(pkt),
1045 s->ext.session_ticket_cb_arg)) {
1046 *al = SSL_AD_INTERNAL_ERROR;
1050 if (!tls_use_ticket(s)) {
1051 *al = SSL_AD_UNSUPPORTED_EXTENSION;
1054 if (PACKET_remaining(pkt) > 0) {
1055 *al = SSL_AD_DECODE_ERROR;
1059 s->ext.ticket_expected = 1;
1064 #ifndef OPENSSL_NO_OCSP
1065 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
1066 X509 *x, size_t chainidx, int *al)
1069 * MUST only be sent if we've requested a status
1070 * request message. In TLS <= 1.2 it must also be empty.
1072 if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) {
1073 *al = SSL_AD_UNSUPPORTED_EXTENSION;
1076 if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) {
1077 *al = SSL_AD_DECODE_ERROR;
1081 if (SSL_IS_TLS13(s)) {
1082 /* We only know how to handle this if it's for the first Certificate in
1083 * the chain. We ignore any other responses.
1087 return tls_process_cert_status_body(s, pkt, al);
1090 /* Set flag to expect CertificateStatus message */
1091 s->ext.status_expected = 1;
1098 #ifndef OPENSSL_NO_CT
1099 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1100 size_t chainidx, int *al)
1103 * Only take it if we asked for it - i.e if there is no CT validation
1104 * callback set, then a custom extension MAY be processing it, so we
1105 * need to let control continue to flow to that.
1107 if (s->ct_validation_callback != NULL) {
1108 size_t size = PACKET_remaining(pkt);
1110 /* Simply copy it off for later processing */
1111 OPENSSL_free(s->ext.scts);
1114 s->ext.scts_len = size;
1116 s->ext.scts = OPENSSL_malloc(size);
1117 if (s->ext.scts == NULL
1118 || !PACKET_copy_bytes(pkt, s->ext.scts, size)) {
1119 *al = SSL_AD_INTERNAL_ERROR;
1124 ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0
1125 ? ENDPOINT_CLIENT : ENDPOINT_BOTH;
1128 * If we didn't ask for it then there must be a custom extension,
1129 * otherwise this is unsolicited.
1131 if (custom_ext_find(&s->cert->custext, role,
1132 TLSEXT_TYPE_signed_certificate_timestamp,
1134 *al = TLS1_AD_UNSUPPORTED_EXTENSION;
1138 if (custom_ext_parse(s, context,
1139 TLSEXT_TYPE_signed_certificate_timestamp,
1140 PACKET_data(pkt), PACKET_remaining(pkt),
1141 x, chainidx, al) <= 0)
1150 #ifndef OPENSSL_NO_NEXTPROTONEG
1152 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1153 * elements of zero length are allowed and the set of elements must exactly
1154 * fill the length of the block. Returns 1 on success or 0 on failure.
1156 static int ssl_next_proto_validate(PACKET *pkt)
1158 PACKET tmp_protocol;
1160 while (PACKET_remaining(pkt)) {
1161 if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol)
1162 || PACKET_remaining(&tmp_protocol) == 0)
1169 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1170 size_t chainidx, int *al)
1172 unsigned char *selected;
1173 unsigned char selected_len;
1176 /* Check if we are in a renegotiation. If so ignore this extension */
1177 if (!SSL_IS_FIRST_HANDSHAKE(s))
1180 /* We must have requested it. */
1181 if (s->ctx->ext.npn_select_cb == NULL) {
1182 *al = SSL_AD_UNSUPPORTED_EXTENSION;
1186 /* The data must be valid */
1188 if (!ssl_next_proto_validate(&tmppkt)) {
1189 *al = SSL_AD_DECODE_ERROR;
1192 if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len,
1194 PACKET_remaining(pkt),
1195 s->ctx->ext.npn_select_cb_arg) !=
1196 SSL_TLSEXT_ERR_OK) {
1197 *al = SSL_AD_INTERNAL_ERROR;
1202 * Could be non-NULL if server has sent multiple NPN extensions in
1203 * a single Serverhello
1205 OPENSSL_free(s->ext.npn);
1206 s->ext.npn = OPENSSL_malloc(selected_len);
1207 if (s->ext.npn == NULL) {
1208 *al = SSL_AD_INTERNAL_ERROR;
1212 memcpy(s->ext.npn, selected, selected_len);
1213 s->ext.npn_len = selected_len;
1214 s->s3->npn_seen = 1;
1220 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1221 size_t chainidx, int *al)
1225 /* We must have requested it. */
1226 if (!s->s3->alpn_sent) {
1227 *al = SSL_AD_UNSUPPORTED_EXTENSION;
1231 * The extension data consists of:
1232 * uint16 list_length
1233 * uint8 proto_length;
1234 * uint8 proto[proto_length];
1236 if (!PACKET_get_net_2_len(pkt, &len)
1237 || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len)
1238 || PACKET_remaining(pkt) != len) {
1239 *al = SSL_AD_DECODE_ERROR;
1242 OPENSSL_free(s->s3->alpn_selected);
1243 s->s3->alpn_selected = OPENSSL_malloc(len);
1244 if (s->s3->alpn_selected == NULL) {
1245 *al = SSL_AD_INTERNAL_ERROR;
1248 if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) {
1249 *al = SSL_AD_DECODE_ERROR;
1252 s->s3->alpn_selected_len = len;
1257 #ifndef OPENSSL_NO_SRTP
1258 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1259 size_t chainidx, int *al)
1261 unsigned int id, ct, mki;
1263 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
1264 SRTP_PROTECTION_PROFILE *prof;
1266 if (!PACKET_get_net_2(pkt, &ct) || ct != 2
1267 || !PACKET_get_net_2(pkt, &id)
1268 || !PACKET_get_1(pkt, &mki)
1269 || PACKET_remaining(pkt) != 0) {
1270 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
1271 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
1272 *al = SSL_AD_DECODE_ERROR;
1277 /* Must be no MKI, since we never offer one */
1278 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_BAD_SRTP_MKI_VALUE);
1279 *al = SSL_AD_ILLEGAL_PARAMETER;
1283 /* Throw an error if the server gave us an unsolicited extension */
1284 clnt = SSL_get_srtp_profiles(s);
1286 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP, SSL_R_NO_SRTP_PROFILES);
1287 *al = SSL_AD_DECODE_ERROR;
1292 * Check to see if the server gave us something we support (and
1293 * presumably offered)
1295 for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) {
1296 prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
1298 if (prof->id == id) {
1299 s->srtp_profile = prof;
1305 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP,
1306 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
1307 *al = SSL_AD_DECODE_ERROR;
1312 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1313 size_t chainidx, int *al)
1315 /* Ignore if inappropriate ciphersuite */
1316 if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
1317 && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD
1318 && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4)
1324 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1325 size_t chainidx, int *al)
1327 s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
1329 s->session->flags |= SSL_SESS_FLAG_EXTMS;
1334 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1335 size_t chainidx, int *al)
1337 #ifndef OPENSSL_NO_TLS1_3
1338 unsigned int group_id;
1340 EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL;
1343 if (ckey == NULL || s->s3->peer_tmp != NULL) {
1344 *al = SSL_AD_INTERNAL_ERROR;
1345 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1349 if (!PACKET_get_net_2(pkt, &group_id)) {
1350 *al = SSL_AD_DECODE_ERROR;
1351 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
1355 if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) {
1356 unsigned const char *pcurves = NULL;
1357 size_t i, num_curves;
1359 if (PACKET_remaining(pkt) != 0) {
1360 *al = SSL_AD_DECODE_ERROR;
1361 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
1366 * It is an error if the HelloRetryRequest wants a key_share that we
1367 * already sent in the first ClientHello
1369 if (group_id == s->s3->group_id) {
1370 *al = SSL_AD_ILLEGAL_PARAMETER;
1371 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1375 /* Validate the selected group is one we support */
1376 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
1377 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1380 for (i = 0; i < num_curves; i++, pcurves += 2) {
1381 if (group_id == bytestogroup(pcurves))
1385 || !tls_curve_allowed(s, pcurves, SSL_SECOP_CURVE_SUPPORTED)) {
1386 *al = SSL_AD_ILLEGAL_PARAMETER;
1387 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1391 s->s3->group_id = group_id;
1392 EVP_PKEY_free(s->s3->tmp.pkey);
1393 s->s3->tmp.pkey = NULL;
1397 if (group_id != s->s3->group_id) {
1399 * This isn't for the group that we sent in the original
1402 *al = SSL_AD_ILLEGAL_PARAMETER;
1403 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1407 if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt)
1408 || PACKET_remaining(&encoded_pt) == 0) {
1409 *al = SSL_AD_DECODE_ERROR;
1410 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_LENGTH_MISMATCH);
1414 skey = ssl_generate_pkey(ckey);
1416 *al = SSL_AD_INTERNAL_ERROR;
1417 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_MALLOC_FAILURE);
1420 if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt),
1421 PACKET_remaining(&encoded_pt))) {
1422 *al = SSL_AD_ILLEGAL_PARAMETER;
1423 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_ECPOINT);
1424 EVP_PKEY_free(skey);
1428 if (ssl_derive(s, ckey, skey, 1) == 0) {
1429 *al = SSL_AD_INTERNAL_ERROR;
1430 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1431 EVP_PKEY_free(skey);
1434 s->s3->peer_tmp = skey;
1440 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1441 size_t chainidx, int *al)
1445 if (!PACKET_as_length_prefixed_2(pkt, &cookie)
1446 || !PACKET_memdup(&cookie, &s->ext.tls13_cookie,
1447 &s->ext.tls13_cookie_len)) {
1448 *al = SSL_AD_DECODE_ERROR;
1449 SSLerr(SSL_F_TLS_PARSE_STOC_COOKIE, SSL_R_LENGTH_MISMATCH);
1456 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
1457 X509 *x, size_t chainidx, int *al)
1459 if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) {
1460 unsigned long max_early_data;
1462 if (!PACKET_get_net_4(pkt, &max_early_data)
1463 || PACKET_remaining(pkt) != 0) {
1464 SSLerr(SSL_F_TLS_PARSE_STOC_EARLY_DATA,
1465 SSL_R_INVALID_MAX_EARLY_DATA);
1466 *al = SSL_AD_DECODE_ERROR;
1470 s->session->ext.max_early_data = max_early_data;
1475 if (PACKET_remaining(pkt) != 0) {
1476 *al = SSL_AD_DECODE_ERROR;
1480 if (s->ext.early_data != SSL_EARLY_DATA_REJECTED
1482 || s->session->ext.tick_identity != 0) {
1484 * If we get here then we didn't send early data, or we didn't resume
1485 * using the first identity so the server should not be accepting it.
1487 *al = SSL_AD_ILLEGAL_PARAMETER;
1491 s->ext.early_data = SSL_EARLY_DATA_ACCEPTED;
1496 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1497 size_t chainidx, int *al)
1499 #ifndef OPENSSL_NO_TLS1_3
1500 unsigned int identity;
1502 if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) {
1503 *al = SSL_AD_DECODE_ERROR;
1504 SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_LENGTH_MISMATCH);
1508 if (s->session->ext.tick_identity != (int)identity) {
1509 *al = SSL_AD_ILLEGAL_PARAMETER;
1510 SSLerr(SSL_F_TLS_PARSE_STOC_PSK, SSL_R_BAD_PSK_IDENTITY);