2 * Copyright 2016-2018 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
10 #include <openssl/ocsp.h>
11 #include "../ssl_locl.h"
12 #include "internal/cryptlib.h"
13 #include "statem_locl.h"
15 EXT_RETURN tls_construct_ctos_renegotiate(SSL *s, WPACKET *pkt,
16 unsigned int context, X509 *x,
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 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE,
29 ERR_R_INTERNAL_ERROR);
30 return EXT_RETURN_FAIL;
33 return EXT_RETURN_SENT;
36 EXT_RETURN tls_construct_ctos_server_name(SSL *s, WPACKET *pkt,
37 unsigned int context, X509 *x,
40 if (s->ext.hostname == NULL)
41 return EXT_RETURN_NOT_SENT;
43 /* Add TLS extension servername to the Client Hello message */
44 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_server_name)
45 /* Sub-packet for server_name extension */
46 || !WPACKET_start_sub_packet_u16(pkt)
47 /* Sub-packet for servername list (always 1 hostname)*/
48 || !WPACKET_start_sub_packet_u16(pkt)
49 || !WPACKET_put_bytes_u8(pkt, TLSEXT_NAMETYPE_host_name)
50 || !WPACKET_sub_memcpy_u16(pkt, s->ext.hostname,
51 strlen(s->ext.hostname))
52 || !WPACKET_close(pkt)
53 || !WPACKET_close(pkt)) {
54 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME,
55 ERR_R_INTERNAL_ERROR);
56 return EXT_RETURN_FAIL;
59 return EXT_RETURN_SENT;
62 /* Push a Max Fragment Len extension into ClientHello */
63 EXT_RETURN tls_construct_ctos_maxfragmentlen(SSL *s, WPACKET *pkt,
64 unsigned int context, X509 *x,
67 if (s->ext.max_fragment_len_mode == TLSEXT_max_fragment_length_DISABLED)
68 return EXT_RETURN_NOT_SENT;
70 /* Add Max Fragment Length extension if client enabled it. */
72 * 4 bytes for this extension type and extension length
73 * 1 byte for the Max Fragment Length code value.
75 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_max_fragment_length)
76 /* Sub-packet for Max Fragment Length extension (1 byte) */
77 || !WPACKET_start_sub_packet_u16(pkt)
78 || !WPACKET_put_bytes_u8(pkt, s->ext.max_fragment_len_mode)
79 || !WPACKET_close(pkt)) {
80 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
81 SSL_F_TLS_CONSTRUCT_CTOS_MAXFRAGMENTLEN, ERR_R_INTERNAL_ERROR);
82 return EXT_RETURN_FAIL;
85 return EXT_RETURN_SENT;
88 #ifndef OPENSSL_NO_SRP
89 EXT_RETURN tls_construct_ctos_srp(SSL *s, WPACKET *pkt, unsigned int context,
90 X509 *x, size_t chainidx)
92 /* Add SRP username if there is one */
93 if (s->srp_ctx.login == NULL)
94 return EXT_RETURN_NOT_SENT;
96 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_srp)
97 /* Sub-packet for SRP extension */
98 || !WPACKET_start_sub_packet_u16(pkt)
99 || !WPACKET_start_sub_packet_u8(pkt)
100 /* login must not be zero...internal error if so */
101 || !WPACKET_set_flags(pkt, WPACKET_FLAGS_NON_ZERO_LENGTH)
102 || !WPACKET_memcpy(pkt, s->srp_ctx.login,
103 strlen(s->srp_ctx.login))
104 || !WPACKET_close(pkt)
105 || !WPACKET_close(pkt)) {
106 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SRP,
107 ERR_R_INTERNAL_ERROR);
108 return EXT_RETURN_FAIL;
111 return EXT_RETURN_SENT;
115 #ifndef OPENSSL_NO_EC
116 static int use_ecc(SSL *s)
119 unsigned long alg_k, alg_a;
120 STACK_OF(SSL_CIPHER) *cipher_stack = NULL;
122 /* See if we support any ECC ciphersuites */
123 if (s->version == SSL3_VERSION)
126 cipher_stack = SSL_get1_supported_ciphers(s);
127 end = sk_SSL_CIPHER_num(cipher_stack);
128 for (i = 0; i < end; i++) {
129 const SSL_CIPHER *c = sk_SSL_CIPHER_value(cipher_stack, i);
131 alg_k = c->algorithm_mkey;
132 alg_a = c->algorithm_auth;
133 if ((alg_k & (SSL_kECDHE | SSL_kECDHEPSK))
134 || (alg_a & SSL_aECDSA)
135 || c->min_tls >= TLS1_3_VERSION) {
141 sk_SSL_CIPHER_free(cipher_stack);
145 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
146 unsigned int context, X509 *x,
149 const unsigned char *pformats;
153 return EXT_RETURN_NOT_SENT;
155 /* Add TLS extension ECPointFormats to the ClientHello message */
156 tls1_get_formatlist(s, &pformats, &num_formats);
158 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats)
159 /* Sub-packet for formats extension */
160 || !WPACKET_start_sub_packet_u16(pkt)
161 || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats)
162 || !WPACKET_close(pkt)) {
163 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
164 SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
165 return EXT_RETURN_FAIL;
168 return EXT_RETURN_SENT;
171 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
172 unsigned int context, X509 *x,
175 const uint16_t *pgroups = NULL;
176 size_t num_groups = 0, i;
179 return EXT_RETURN_NOT_SENT;
182 * Add TLS extension supported_groups to the ClientHello message
184 /* TODO(TLS1.3): Add support for DHE groups */
185 tls1_get_supported_groups(s, &pgroups, &num_groups);
187 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups)
188 /* Sub-packet for supported_groups extension */
189 || !WPACKET_start_sub_packet_u16(pkt)
190 || !WPACKET_start_sub_packet_u16(pkt)) {
191 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
192 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
193 ERR_R_INTERNAL_ERROR);
194 return EXT_RETURN_FAIL;
196 /* Copy curve ID if supported */
197 for (i = 0; i < num_groups; i++) {
198 uint16_t ctmp = pgroups[i];
200 if (tls_curve_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) {
201 if (!WPACKET_put_bytes_u16(pkt, ctmp)) {
202 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
203 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
204 ERR_R_INTERNAL_ERROR);
205 return EXT_RETURN_FAIL;
209 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
210 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
211 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
212 ERR_R_INTERNAL_ERROR);
213 return EXT_RETURN_FAIL;
216 return EXT_RETURN_SENT;
220 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
221 unsigned int context, X509 *x,
226 if (!tls_use_ticket(s))
227 return EXT_RETURN_NOT_SENT;
229 if (!s->new_session && s->session != NULL
230 && s->session->ext.tick != NULL
231 && s->session->ssl_version != TLS1_3_VERSION) {
232 ticklen = s->session->ext.ticklen;
233 } else if (s->session && s->ext.session_ticket != NULL
234 && s->ext.session_ticket->data != NULL) {
235 ticklen = s->ext.session_ticket->length;
236 s->session->ext.tick = OPENSSL_malloc(ticklen);
237 if (s->session->ext.tick == NULL) {
238 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
239 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET,
240 ERR_R_INTERNAL_ERROR);
241 return EXT_RETURN_FAIL;
243 memcpy(s->session->ext.tick,
244 s->ext.session_ticket->data, ticklen);
245 s->session->ext.ticklen = ticklen;
250 if (ticklen == 0 && s->ext.session_ticket != NULL &&
251 s->ext.session_ticket->data == NULL)
252 return EXT_RETURN_NOT_SENT;
254 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket)
255 || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) {
256 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
257 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
258 return EXT_RETURN_FAIL;
261 return EXT_RETURN_SENT;
264 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
265 unsigned int context, X509 *x,
269 const uint16_t *salg;
271 if (!SSL_CLIENT_USE_SIGALGS(s))
272 return EXT_RETURN_NOT_SENT;
274 salglen = tls12_get_psigalgs(s, 1, &salg);
275 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms)
276 /* Sub-packet for sig-algs extension */
277 || !WPACKET_start_sub_packet_u16(pkt)
278 /* Sub-packet for the actual list */
279 || !WPACKET_start_sub_packet_u16(pkt)
280 || !tls12_copy_sigalgs(s, pkt, salg, salglen)
281 || !WPACKET_close(pkt)
282 || !WPACKET_close(pkt)) {
283 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS,
284 ERR_R_INTERNAL_ERROR);
285 return EXT_RETURN_FAIL;
288 return EXT_RETURN_SENT;
291 #ifndef OPENSSL_NO_OCSP
292 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
293 unsigned int context, X509 *x,
298 /* This extension isn't defined for client Certificates */
300 return EXT_RETURN_NOT_SENT;
302 if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp)
303 return EXT_RETURN_NOT_SENT;
305 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request)
306 /* Sub-packet for status request extension */
307 || !WPACKET_start_sub_packet_u16(pkt)
308 || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp)
309 /* Sub-packet for the ids */
310 || !WPACKET_start_sub_packet_u16(pkt)) {
311 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
312 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
313 return EXT_RETURN_FAIL;
315 for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) {
316 unsigned char *idbytes;
317 OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i);
318 int idlen = i2d_OCSP_RESPID(id, NULL);
321 /* Sub-packet for an individual id */
322 || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes)
323 || i2d_OCSP_RESPID(id, &idbytes) != idlen) {
324 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
325 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
326 ERR_R_INTERNAL_ERROR);
327 return EXT_RETURN_FAIL;
330 if (!WPACKET_close(pkt)
331 || !WPACKET_start_sub_packet_u16(pkt)) {
332 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
333 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
334 return EXT_RETURN_FAIL;
336 if (s->ext.ocsp.exts) {
337 unsigned char *extbytes;
338 int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL);
341 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
342 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
343 ERR_R_INTERNAL_ERROR);
344 return EXT_RETURN_FAIL;
346 if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes)
347 || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes)
349 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
350 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
351 ERR_R_INTERNAL_ERROR);
352 return EXT_RETURN_FAIL;
355 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
356 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
357 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
358 return EXT_RETURN_FAIL;
361 return EXT_RETURN_SENT;
365 #ifndef OPENSSL_NO_NEXTPROTONEG
366 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
367 X509 *x, size_t chainidx)
369 if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s))
370 return EXT_RETURN_NOT_SENT;
373 * The client advertises an empty extension to indicate its support
374 * for Next Protocol Negotiation
376 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg)
377 || !WPACKET_put_bytes_u16(pkt, 0)) {
378 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_NPN,
379 ERR_R_INTERNAL_ERROR);
380 return EXT_RETURN_FAIL;
383 return EXT_RETURN_SENT;
387 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
388 X509 *x, size_t chainidx)
390 s->s3->alpn_sent = 0;
392 if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s))
393 return EXT_RETURN_NOT_SENT;
395 if (!WPACKET_put_bytes_u16(pkt,
396 TLSEXT_TYPE_application_layer_protocol_negotiation)
397 /* Sub-packet ALPN extension */
398 || !WPACKET_start_sub_packet_u16(pkt)
399 || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len)
400 || !WPACKET_close(pkt)) {
401 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ALPN,
402 ERR_R_INTERNAL_ERROR);
403 return EXT_RETURN_FAIL;
405 s->s3->alpn_sent = 1;
407 return EXT_RETURN_SENT;
411 #ifndef OPENSSL_NO_SRTP
412 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt,
413 unsigned int context, X509 *x,
416 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s);
420 return EXT_RETURN_NOT_SENT;
422 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp)
423 /* Sub-packet for SRTP extension */
424 || !WPACKET_start_sub_packet_u16(pkt)
425 /* Sub-packet for the protection profile list */
426 || !WPACKET_start_sub_packet_u16(pkt)) {
427 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP,
428 ERR_R_INTERNAL_ERROR);
429 return EXT_RETURN_FAIL;
432 end = sk_SRTP_PROTECTION_PROFILE_num(clnt);
433 for (i = 0; i < end; i++) {
434 const SRTP_PROTECTION_PROFILE *prof =
435 sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
437 if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) {
438 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
439 SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
440 return EXT_RETURN_FAIL;
443 if (!WPACKET_close(pkt)
444 /* Add an empty use_mki value */
445 || !WPACKET_put_bytes_u8(pkt, 0)
446 || !WPACKET_close(pkt)) {
447 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP,
448 ERR_R_INTERNAL_ERROR);
449 return EXT_RETURN_FAIL;
452 return EXT_RETURN_SENT;
456 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
457 X509 *x, size_t chainidx)
459 if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
460 return EXT_RETURN_NOT_SENT;
462 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac)
463 || !WPACKET_put_bytes_u16(pkt, 0)) {
464 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ETM,
465 ERR_R_INTERNAL_ERROR);
466 return EXT_RETURN_FAIL;
469 return EXT_RETURN_SENT;
472 #ifndef OPENSSL_NO_CT
473 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
474 X509 *x, size_t chainidx)
476 if (s->ct_validation_callback == NULL)
477 return EXT_RETURN_NOT_SENT;
479 /* Not defined for client Certificates */
481 return EXT_RETURN_NOT_SENT;
483 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp)
484 || !WPACKET_put_bytes_u16(pkt, 0)) {
485 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SCT,
486 ERR_R_INTERNAL_ERROR);
487 return EXT_RETURN_FAIL;
490 return EXT_RETURN_SENT;
494 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
495 X509 *x, size_t chainidx)
497 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
498 || !WPACKET_put_bytes_u16(pkt, 0)) {
499 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EMS,
500 ERR_R_INTERNAL_ERROR);
501 return EXT_RETURN_FAIL;
504 return EXT_RETURN_SENT;
507 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
508 unsigned int context, X509 *x,
511 int currv, min_version, max_version, reason;
513 reason = ssl_get_min_max_version(s, &min_version, &max_version, NULL);
515 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
516 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason);
517 return EXT_RETURN_FAIL;
521 * Don't include this if we can't negotiate TLSv1.3. We can do a straight
522 * comparison here because we will never be called in DTLS.
524 if (max_version < TLS1_3_VERSION)
525 return EXT_RETURN_NOT_SENT;
527 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions)
528 || !WPACKET_start_sub_packet_u16(pkt)
529 || !WPACKET_start_sub_packet_u8(pkt)) {
530 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
531 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
532 ERR_R_INTERNAL_ERROR);
533 return EXT_RETURN_FAIL;
536 for (currv = max_version; currv >= min_version; currv--) {
537 if (!WPACKET_put_bytes_u16(pkt, currv)) {
538 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
539 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
540 ERR_R_INTERNAL_ERROR);
541 return EXT_RETURN_FAIL;
544 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
545 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
546 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
547 ERR_R_INTERNAL_ERROR);
548 return EXT_RETURN_FAIL;
551 return EXT_RETURN_SENT;
555 * Construct a psk_kex_modes extension.
557 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
558 unsigned int context, X509 *x,
561 #ifndef OPENSSL_NO_TLS1_3
562 int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX;
564 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes)
565 || !WPACKET_start_sub_packet_u16(pkt)
566 || !WPACKET_start_sub_packet_u8(pkt)
567 || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE)
568 || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE))
569 || !WPACKET_close(pkt)
570 || !WPACKET_close(pkt)) {
571 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
572 SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR);
573 return EXT_RETURN_FAIL;
576 s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE;
578 s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE;
581 return EXT_RETURN_SENT;
584 #ifndef OPENSSL_NO_TLS1_3
585 static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id)
587 unsigned char *encoded_point = NULL;
588 EVP_PKEY *key_share_key = NULL;
591 if (s->s3->tmp.pkey != NULL) {
592 if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) {
593 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE,
594 ERR_R_INTERNAL_ERROR);
598 * Could happen if we got an HRR that wasn't requesting a new key_share
600 key_share_key = s->s3->tmp.pkey;
602 key_share_key = ssl_generate_pkey_group(s, curve_id);
603 if (key_share_key == NULL) {
604 /* SSLfatal() already called */
609 /* Encode the public key. */
610 encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key,
612 if (encodedlen == 0) {
613 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, ERR_R_EC_LIB);
617 /* Create KeyShareEntry */
618 if (!WPACKET_put_bytes_u16(pkt, curve_id)
619 || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) {
620 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE,
621 ERR_R_INTERNAL_ERROR);
626 * TODO(TLS1.3): When changing to send more than one key_share we're
627 * going to need to be able to save more than one EVP_PKEY. For now
628 * we reuse the existing tmp.pkey
630 s->s3->tmp.pkey = key_share_key;
631 s->s3->group_id = curve_id;
632 OPENSSL_free(encoded_point);
636 if (s->s3->tmp.pkey == NULL)
637 EVP_PKEY_free(key_share_key);
638 OPENSSL_free(encoded_point);
643 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
644 unsigned int context, X509 *x,
647 #ifndef OPENSSL_NO_TLS1_3
648 size_t i, num_groups = 0;
649 const uint16_t *pgroups = NULL;
650 uint16_t curve_id = 0;
652 /* key_share extension */
653 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
654 /* Extension data sub-packet */
655 || !WPACKET_start_sub_packet_u16(pkt)
656 /* KeyShare list sub-packet */
657 || !WPACKET_start_sub_packet_u16(pkt)) {
658 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,
659 ERR_R_INTERNAL_ERROR);
660 return EXT_RETURN_FAIL;
663 tls1_get_supported_groups(s, &pgroups, &num_groups);
666 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
669 if (s->s3->group_id != 0) {
670 curve_id = s->s3->group_id;
672 for (i = 0; i < num_groups; i++) {
674 if (!tls_curve_allowed(s, pgroups[i], SSL_SECOP_CURVE_SUPPORTED))
677 curve_id = pgroups[i];
683 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,
684 SSL_R_NO_SUITABLE_KEY_SHARE);
685 return EXT_RETURN_FAIL;
688 if (!add_key_share(s, pkt, curve_id)) {
689 /* SSLfatal() already called */
690 return EXT_RETURN_FAIL;
693 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
694 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,
695 ERR_R_INTERNAL_ERROR);
696 return EXT_RETURN_FAIL;
698 return EXT_RETURN_SENT;
700 return EXT_RETURN_NOT_SENT;
704 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
705 X509 *x, size_t chainidx)
707 EXT_RETURN ret = EXT_RETURN_FAIL;
709 /* Should only be set if we've had an HRR */
710 if (s->ext.tls13_cookie_len == 0)
711 return EXT_RETURN_NOT_SENT;
713 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie)
714 /* Extension data sub-packet */
715 || !WPACKET_start_sub_packet_u16(pkt)
716 || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie,
717 s->ext.tls13_cookie_len)
718 || !WPACKET_close(pkt)) {
719 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_COOKIE,
720 ERR_R_INTERNAL_ERROR);
724 ret = EXT_RETURN_SENT;
726 OPENSSL_free(s->ext.tls13_cookie);
727 s->ext.tls13_cookie = NULL;
728 s->ext.tls13_cookie_len = 0;
733 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
734 unsigned int context, X509 *x,
737 #ifndef OPENSSL_NO_PSK
738 char identity[PSK_MAX_IDENTITY_LEN + 1];
739 #endif /* OPENSSL_NO_PSK */
740 const unsigned char *id = NULL;
742 SSL_SESSION *psksess = NULL;
743 SSL_SESSION *edsess = NULL;
744 const EVP_MD *handmd = NULL;
746 if (s->hello_retry_request == SSL_HRR_PENDING)
747 handmd = ssl_handshake_md(s);
749 if (s->psk_use_session_cb != NULL
750 && (!s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess)
752 && psksess->ssl_version != TLS1_3_VERSION))) {
753 SSL_SESSION_free(psksess);
754 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
756 return EXT_RETURN_FAIL;
759 #ifndef OPENSSL_NO_PSK
760 if (psksess == NULL && s->psk_client_callback != NULL) {
761 unsigned char psk[PSK_MAX_PSK_LEN];
764 memset(identity, 0, sizeof(identity));
765 psklen = s->psk_client_callback(s, NULL, identity, sizeof(identity) - 1,
768 if (psklen > PSK_MAX_PSK_LEN) {
769 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
770 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR);
771 return EXT_RETURN_FAIL;
772 } else if (psklen > 0) {
773 const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 };
774 const SSL_CIPHER *cipher;
776 idlen = strlen(identity);
777 if (idlen > PSK_MAX_IDENTITY_LEN) {
778 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
779 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
780 ERR_R_INTERNAL_ERROR);
781 return EXT_RETURN_FAIL;
783 id = (unsigned char *)identity;
786 * We found a PSK using an old style callback. We don't know
787 * the digest so we default to SHA256 as per the TLSv1.3 spec
789 cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id);
790 if (cipher == NULL) {
791 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
792 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
793 ERR_R_INTERNAL_ERROR);
794 return EXT_RETURN_FAIL;
797 psksess = SSL_SESSION_new();
799 || !SSL_SESSION_set1_master_key(psksess, psk, psklen)
800 || !SSL_SESSION_set_cipher(psksess, cipher)
801 || !SSL_SESSION_set_protocol_version(psksess, TLS1_3_VERSION)) {
802 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
803 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
804 ERR_R_INTERNAL_ERROR);
805 OPENSSL_cleanse(psk, psklen);
806 return EXT_RETURN_FAIL;
808 OPENSSL_cleanse(psk, psklen);
811 #endif /* OPENSSL_NO_PSK */
813 SSL_SESSION_free(s->psksession);
814 s->psksession = psksess;
815 if (psksess != NULL) {
816 OPENSSL_free(s->psksession_id);
817 s->psksession_id = OPENSSL_memdup(id, idlen);
818 if (s->psksession_id == NULL) {
819 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
820 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR);
821 return EXT_RETURN_FAIL;
823 s->psksession_id_len = idlen;
826 if (s->early_data_state != SSL_EARLY_DATA_CONNECTING
827 || (s->session->ext.max_early_data == 0
828 && (psksess == NULL || psksess->ext.max_early_data == 0))) {
829 s->max_early_data = 0;
830 return EXT_RETURN_NOT_SENT;
832 edsess = s->session->ext.max_early_data != 0 ? s->session : psksess;
833 s->max_early_data = edsess->ext.max_early_data;
835 if (edsess->ext.hostname != NULL) {
836 if (s->ext.hostname == NULL
837 || (s->ext.hostname != NULL
838 && strcmp(s->ext.hostname, edsess->ext.hostname) != 0)) {
839 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
840 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
841 SSL_R_INCONSISTENT_EARLY_DATA_SNI);
842 return EXT_RETURN_FAIL;
846 if ((s->ext.alpn == NULL && edsess->ext.alpn_selected != NULL)) {
847 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
848 SSL_R_INCONSISTENT_EARLY_DATA_ALPN);
849 return EXT_RETURN_FAIL;
853 * Verify that we are offering an ALPN protocol consistent with the early
856 if (edsess->ext.alpn_selected != NULL) {
857 PACKET prots, alpnpkt;
860 if (!PACKET_buf_init(&prots, s->ext.alpn, s->ext.alpn_len)) {
861 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
862 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR);
863 return EXT_RETURN_FAIL;
865 while (PACKET_get_length_prefixed_1(&prots, &alpnpkt)) {
866 if (PACKET_equal(&alpnpkt, edsess->ext.alpn_selected,
867 edsess->ext.alpn_selected_len)) {
873 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
874 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
875 SSL_R_INCONSISTENT_EARLY_DATA_ALPN);
876 return EXT_RETURN_FAIL;
880 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data)
881 || !WPACKET_start_sub_packet_u16(pkt)
882 || !WPACKET_close(pkt)) {
883 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
884 ERR_R_INTERNAL_ERROR);
885 return EXT_RETURN_FAIL;
889 * We set this to rejected here. Later, if the server acknowledges the
890 * extension, we set it to accepted.
892 s->ext.early_data = SSL_EARLY_DATA_REJECTED;
893 s->ext.early_data_ok = 1;
895 return EXT_RETURN_SENT;
898 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
899 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
902 * PSK pre binder overhead =
903 * 2 bytes for TLSEXT_TYPE_psk
904 * 2 bytes for extension length
905 * 2 bytes for identities list length
906 * 2 bytes for identity length
907 * 4 bytes for obfuscated_ticket_age
908 * 2 bytes for binder list length
909 * 1 byte for binder length
910 * The above excludes the number of bytes for the identity itself and the
911 * subsequent binder bytes
913 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
915 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
916 unsigned int context, X509 *x,
919 unsigned char *padbytes;
922 if ((s->options & SSL_OP_TLSEXT_PADDING) == 0)
923 return EXT_RETURN_NOT_SENT;
926 * Add padding to workaround bugs in F5 terminators. See RFC7685.
927 * This code calculates the length of all extensions added so far but
928 * excludes the PSK extension (because that MUST be written last). Therefore
929 * this extension MUST always appear second to last.
931 if (!WPACKET_get_total_written(pkt, &hlen)) {
932 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING,
933 ERR_R_INTERNAL_ERROR);
934 return EXT_RETURN_FAIL;
938 * If we're going to send a PSK then that will be written out after this
939 * extension, so we need to calculate how long it is going to be.
941 if (s->session->ssl_version == TLS1_3_VERSION
942 && s->session->ext.ticklen != 0
943 && s->session->cipher != NULL) {
944 const EVP_MD *md = ssl_md(s->session->cipher->algorithm2);
948 * Add the fixed PSK overhead, the identity length and the binder
951 hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen
956 if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) {
957 /* Calculate the amount of padding we need to add */
958 hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen;
961 * Take off the size of extension header itself (2 bytes for type and
962 * 2 bytes for length bytes), but ensure that the extension is at least
963 * 1 byte long so as not to have an empty extension last (WebSphere 7.x,
964 * 8.x are intolerant of that condition)
971 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding)
972 || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) {
973 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING,
974 ERR_R_INTERNAL_ERROR);
975 return EXT_RETURN_FAIL;
977 memset(padbytes, 0, hlen);
980 return EXT_RETURN_SENT;
984 * Construct the pre_shared_key extension
986 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
987 X509 *x, size_t chainidx)
989 #ifndef OPENSSL_NO_TLS1_3
990 uint32_t now, agesec, agems = 0;
991 size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen;
992 unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL;
993 const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL;
996 s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY;
999 * Note: At this stage of the code we only support adding a single
1000 * resumption PSK. If we add support for multiple PSKs then the length
1001 * calculations in the padding extension will need to be adjusted.
1005 * If this is an incompatible or new session then we have nothing to resume
1006 * so don't add this extension.
1008 if (s->session->ssl_version != TLS1_3_VERSION
1009 || (s->session->ext.ticklen == 0 && s->psksession == NULL))
1010 return EXT_RETURN_NOT_SENT;
1012 if (s->hello_retry_request == SSL_HRR_PENDING)
1013 handmd = ssl_handshake_md(s);
1015 if (s->session->ext.ticklen != 0) {
1016 /* Get the digest associated with the ciphersuite in the session */
1017 if (s->session->cipher == NULL) {
1018 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1019 ERR_R_INTERNAL_ERROR);
1020 return EXT_RETURN_FAIL;
1022 mdres = ssl_md(s->session->cipher->algorithm2);
1023 if (mdres == NULL) {
1025 * Don't recognize this cipher so we can't use the session.
1031 if (s->hello_retry_request == SSL_HRR_PENDING && mdres != handmd) {
1033 * Selected ciphersuite hash does not match the hash for the session
1034 * so we can't use it.
1040 * Technically the C standard just says time() returns a time_t and says
1041 * nothing about the encoding of that type. In practice most
1042 * implementations follow POSIX which holds it as an integral type in
1043 * seconds since epoch. We've already made the assumption that we can do
1044 * this in multiple places in the code, so portability shouldn't be an
1047 now = (uint32_t)time(NULL);
1048 agesec = now - (uint32_t)s->session->time;
1050 * We calculate the age in seconds but the server may work in ms. Due to
1051 * rounding errors we could overestimate the age by up to 1s. It is
1052 * better to underestimate it. Otherwise, if the RTT is very short, when
1053 * the server calculates the age reported by the client it could be
1054 * bigger than the age calculated on the server - which should never
1060 if (s->session->ext.tick_lifetime_hint < agesec) {
1061 /* Ticket is too old. Ignore it. */
1066 * Calculate age in ms. We're just doing it to nearest second. Should be
1069 agems = agesec * (uint32_t)1000;
1071 if (agesec != 0 && agems / (uint32_t)1000 != agesec) {
1073 * Overflow. Shouldn't happen unless this is a *really* old session.
1074 * If so we just ignore it.
1080 * Obfuscate the age. Overflow here is fine, this addition is supposed
1083 agems += s->session->ext.tick_age_add;
1085 reshashsize = EVP_MD_size(mdres);
1090 if (!dores && s->psksession == NULL)
1091 return EXT_RETURN_NOT_SENT;
1093 if (s->psksession != NULL) {
1094 mdpsk = ssl_md(s->psksession->cipher->algorithm2);
1095 if (mdpsk == NULL) {
1097 * Don't recognize this cipher so we can't use the session.
1098 * If this happens it's an application bug.
1100 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1102 return EXT_RETURN_FAIL;
1105 if (s->hello_retry_request == SSL_HRR_PENDING && mdpsk != handmd) {
1107 * Selected ciphersuite hash does not match the hash for the PSK
1108 * session. This is an application bug.
1110 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1112 return EXT_RETURN_FAIL;
1115 pskhashsize = EVP_MD_size(mdpsk);
1118 /* Create the extension, but skip over the binder for now */
1119 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk)
1120 || !WPACKET_start_sub_packet_u16(pkt)
1121 || !WPACKET_start_sub_packet_u16(pkt)) {
1122 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1123 ERR_R_INTERNAL_ERROR);
1124 return EXT_RETURN_FAIL;
1128 if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick,
1129 s->session->ext.ticklen)
1130 || !WPACKET_put_bytes_u32(pkt, agems)) {
1131 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1132 ERR_R_INTERNAL_ERROR);
1133 return EXT_RETURN_FAIL;
1137 if (s->psksession != NULL) {
1138 if (!WPACKET_sub_memcpy_u16(pkt, s->psksession_id,
1139 s->psksession_id_len)
1140 || !WPACKET_put_bytes_u32(pkt, 0)) {
1141 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1142 ERR_R_INTERNAL_ERROR);
1143 return EXT_RETURN_FAIL;
1147 if (!WPACKET_close(pkt)
1148 || !WPACKET_get_total_written(pkt, &binderoffset)
1149 || !WPACKET_start_sub_packet_u16(pkt)
1151 && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder))
1152 || (s->psksession != NULL
1153 && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder))
1154 || !WPACKET_close(pkt)
1155 || !WPACKET_close(pkt)
1156 || !WPACKET_get_total_written(pkt, &msglen)
1158 * We need to fill in all the sub-packet lengths now so we can
1159 * calculate the HMAC of the message up to the binders
1161 || !WPACKET_fill_lengths(pkt)) {
1162 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1163 ERR_R_INTERNAL_ERROR);
1164 return EXT_RETURN_FAIL;
1167 msgstart = WPACKET_get_curr(pkt) - msglen;
1170 && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL,
1171 resbinder, s->session, 1, 0) != 1) {
1172 /* SSLfatal() already called */
1173 return EXT_RETURN_FAIL;
1176 if (s->psksession != NULL
1177 && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL,
1178 pskbinder, s->psksession, 1, 1) != 1) {
1179 /* SSLfatal() already called */
1180 return EXT_RETURN_FAIL;
1184 s->session->ext.tick_identity = 0;
1185 if (s->psksession != NULL)
1186 s->psksession->ext.tick_identity = (dores ? 1 : 0);
1188 return EXT_RETURN_SENT;
1190 return EXT_RETURN_NOT_SENT;
1194 EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt,
1195 unsigned int context,
1196 X509 *x, size_t chainidx)
1198 #ifndef OPENSSL_NO_TLS1_3
1199 if (!s->pha_enabled)
1200 return EXT_RETURN_NOT_SENT;
1202 /* construct extension - 0 length, no contents */
1203 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_post_handshake_auth)
1204 || !WPACKET_start_sub_packet_u16(pkt)
1205 || !WPACKET_close(pkt)) {
1206 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
1207 SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH,
1208 ERR_R_INTERNAL_ERROR);
1209 return EXT_RETURN_FAIL;
1212 s->post_handshake_auth = SSL_PHA_EXT_SENT;
1214 return EXT_RETURN_SENT;
1216 return EXT_RETURN_NOT_SENT;
1222 * Parse the server's renegotiation binding and abort if it's not right
1224 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
1225 X509 *x, size_t chainidx)
1227 size_t expected_len = s->s3->previous_client_finished_len
1228 + s->s3->previous_server_finished_len;
1230 const unsigned char *data;
1232 /* Check for logic errors */
1233 if (!ossl_assert(expected_len == 0
1234 || s->s3->previous_client_finished_len != 0)
1235 || !ossl_assert(expected_len == 0
1236 || s->s3->previous_server_finished_len != 0)) {
1237 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1238 ERR_R_INTERNAL_ERROR);
1242 /* Parse the length byte */
1243 if (!PACKET_get_1_len(pkt, &ilen)) {
1244 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1245 SSL_R_RENEGOTIATION_ENCODING_ERR);
1249 /* Consistency check */
1250 if (PACKET_remaining(pkt) != ilen) {
1251 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1252 SSL_R_RENEGOTIATION_ENCODING_ERR);
1256 /* Check that the extension matches */
1257 if (ilen != expected_len) {
1258 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1259 SSL_R_RENEGOTIATION_MISMATCH);
1263 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
1264 || memcmp(data, s->s3->previous_client_finished,
1265 s->s3->previous_client_finished_len) != 0) {
1266 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1267 SSL_R_RENEGOTIATION_MISMATCH);
1271 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
1272 || memcmp(data, s->s3->previous_server_finished,
1273 s->s3->previous_server_finished_len) != 0) {
1274 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1275 SSL_R_RENEGOTIATION_MISMATCH);
1278 s->s3->send_connection_binding = 1;
1283 /* Parse the server's max fragment len extension packet */
1284 int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
1285 X509 *x, size_t chainidx)
1289 if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) {
1290 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN,
1291 SSL_R_BAD_EXTENSION);
1295 /* |value| should contains a valid max-fragment-length code. */
1296 if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) {
1297 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1298 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN,
1299 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
1303 /* Must be the same value as client-configured one who was sent to server */
1305 * RFC 6066: if a client receives a maximum fragment length negotiation
1306 * response that differs from the length it requested, ...
1307 * It must abort with SSL_AD_ILLEGAL_PARAMETER alert
1309 if (value != s->ext.max_fragment_len_mode) {
1310 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1311 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN,
1312 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
1317 * Maximum Fragment Length Negotiation succeeded.
1318 * The negotiated Maximum Fragment Length is binding now.
1320 s->session->ext.max_fragment_len_mode = value;
1325 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
1326 X509 *x, size_t chainidx)
1328 if (s->ext.hostname == NULL) {
1329 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME,
1330 ERR_R_INTERNAL_ERROR);
1334 if (PACKET_remaining(pkt) > 0) {
1335 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME,
1336 SSL_R_BAD_EXTENSION);
1341 if (s->session->ext.hostname != NULL) {
1342 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME,
1343 ERR_R_INTERNAL_ERROR);
1346 s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname);
1347 if (s->session->ext.hostname == NULL) {
1348 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME,
1349 ERR_R_INTERNAL_ERROR);
1357 #ifndef OPENSSL_NO_EC
1358 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
1359 X509 *x, size_t chainidx)
1361 size_t ecpointformats_len;
1362 PACKET ecptformatlist;
1364 if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) {
1365 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS,
1366 SSL_R_BAD_EXTENSION);
1370 ecpointformats_len = PACKET_remaining(&ecptformatlist);
1371 if (ecpointformats_len == 0) {
1372 SSLfatal(s, SSL_AD_DECODE_ERROR,
1373 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, SSL_R_BAD_LENGTH);
1377 s->session->ext.ecpointformats_len = 0;
1378 OPENSSL_free(s->session->ext.ecpointformats);
1379 s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len);
1380 if (s->session->ext.ecpointformats == NULL) {
1381 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
1382 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
1386 s->session->ext.ecpointformats_len = ecpointformats_len;
1388 if (!PACKET_copy_bytes(&ecptformatlist,
1389 s->session->ext.ecpointformats,
1390 ecpointformats_len)) {
1391 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
1392 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
1401 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
1402 X509 *x, size_t chainidx)
1404 if (s->ext.session_ticket_cb != NULL &&
1405 !s->ext.session_ticket_cb(s, PACKET_data(pkt),
1406 PACKET_remaining(pkt),
1407 s->ext.session_ticket_cb_arg)) {
1408 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
1409 SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION);
1413 if (!tls_use_ticket(s)) {
1414 SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION,
1415 SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION);
1418 if (PACKET_remaining(pkt) > 0) {
1419 SSLfatal(s, SSL_AD_DECODE_ERROR,
1420 SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION);
1424 s->ext.ticket_expected = 1;
1429 #ifndef OPENSSL_NO_OCSP
1430 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
1431 X509 *x, size_t chainidx)
1433 if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) {
1434 /* We ignore this if the server sends a CertificateRequest */
1435 /* TODO(TLS1.3): Add support for this */
1440 * MUST only be sent if we've requested a status
1441 * request message. In TLS <= 1.2 it must also be empty.
1443 if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) {
1444 SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION,
1445 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
1448 if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) {
1449 SSLfatal(s, SSL_AD_DECODE_ERROR,
1450 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
1454 if (SSL_IS_TLS13(s)) {
1455 /* We only know how to handle this if it's for the first Certificate in
1456 * the chain. We ignore any other responses.
1461 /* SSLfatal() already called */
1462 return tls_process_cert_status_body(s, pkt);
1465 /* Set flag to expect CertificateStatus message */
1466 s->ext.status_expected = 1;
1473 #ifndef OPENSSL_NO_CT
1474 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1477 if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) {
1478 /* We ignore this if the server sends it in a CertificateRequest */
1479 /* TODO(TLS1.3): Add support for this */
1484 * Only take it if we asked for it - i.e if there is no CT validation
1485 * callback set, then a custom extension MAY be processing it, so we
1486 * need to let control continue to flow to that.
1488 if (s->ct_validation_callback != NULL) {
1489 size_t size = PACKET_remaining(pkt);
1491 /* Simply copy it off for later processing */
1492 OPENSSL_free(s->ext.scts);
1495 s->ext.scts_len = (uint16_t)size;
1497 s->ext.scts = OPENSSL_malloc(size);
1498 if (s->ext.scts == NULL
1499 || !PACKET_copy_bytes(pkt, s->ext.scts, size)) {
1500 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SCT,
1501 ERR_R_INTERNAL_ERROR);
1506 ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0
1507 ? ENDPOINT_CLIENT : ENDPOINT_BOTH;
1510 * If we didn't ask for it then there must be a custom extension,
1511 * otherwise this is unsolicited.
1513 if (custom_ext_find(&s->cert->custext, role,
1514 TLSEXT_TYPE_signed_certificate_timestamp,
1516 SSLfatal(s, TLS1_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_SCT,
1517 SSL_R_BAD_EXTENSION);
1521 if (!custom_ext_parse(s, context,
1522 TLSEXT_TYPE_signed_certificate_timestamp,
1523 PACKET_data(pkt), PACKET_remaining(pkt),
1525 /* SSLfatal already called */
1535 #ifndef OPENSSL_NO_NEXTPROTONEG
1537 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1538 * elements of zero length are allowed and the set of elements must exactly
1539 * fill the length of the block. Returns 1 on success or 0 on failure.
1541 static int ssl_next_proto_validate(SSL *s, PACKET *pkt)
1543 PACKET tmp_protocol;
1545 while (PACKET_remaining(pkt)) {
1546 if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol)
1547 || PACKET_remaining(&tmp_protocol) == 0) {
1548 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_NEXT_PROTO_VALIDATE,
1549 SSL_R_BAD_EXTENSION);
1557 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1560 unsigned char *selected;
1561 unsigned char selected_len;
1564 /* Check if we are in a renegotiation. If so ignore this extension */
1565 if (!SSL_IS_FIRST_HANDSHAKE(s))
1568 /* We must have requested it. */
1569 if (s->ctx->ext.npn_select_cb == NULL) {
1570 SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_NPN,
1571 SSL_R_BAD_EXTENSION);
1575 /* The data must be valid */
1577 if (!ssl_next_proto_validate(s, &tmppkt)) {
1578 /* SSLfatal() already called */
1581 if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len,
1583 PACKET_remaining(pkt),
1584 s->ctx->ext.npn_select_cb_arg) !=
1585 SSL_TLSEXT_ERR_OK) {
1586 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PARSE_STOC_NPN,
1587 SSL_R_BAD_EXTENSION);
1592 * Could be non-NULL if server has sent multiple NPN extensions in
1593 * a single Serverhello
1595 OPENSSL_free(s->ext.npn);
1596 s->ext.npn = OPENSSL_malloc(selected_len);
1597 if (s->ext.npn == NULL) {
1598 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_NPN,
1599 ERR_R_INTERNAL_ERROR);
1603 memcpy(s->ext.npn, selected, selected_len);
1604 s->ext.npn_len = selected_len;
1605 s->s3->npn_seen = 1;
1611 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1616 /* We must have requested it. */
1617 if (!s->s3->alpn_sent) {
1618 SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_ALPN,
1619 SSL_R_BAD_EXTENSION);
1623 * The extension data consists of:
1624 * uint16 list_length
1625 * uint8 proto_length;
1626 * uint8 proto[proto_length];
1628 if (!PACKET_get_net_2_len(pkt, &len)
1629 || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len)
1630 || PACKET_remaining(pkt) != len) {
1631 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1632 SSL_R_BAD_EXTENSION);
1635 OPENSSL_free(s->s3->alpn_selected);
1636 s->s3->alpn_selected = OPENSSL_malloc(len);
1637 if (s->s3->alpn_selected == NULL) {
1638 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1639 ERR_R_INTERNAL_ERROR);
1642 if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) {
1643 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1644 SSL_R_BAD_EXTENSION);
1647 s->s3->alpn_selected_len = len;
1649 if (s->session->ext.alpn_selected == NULL
1650 || s->session->ext.alpn_selected_len != len
1651 || memcmp(s->session->ext.alpn_selected, s->s3->alpn_selected, len)
1653 /* ALPN not consistent with the old session so cannot use early_data */
1654 s->ext.early_data_ok = 0;
1658 * This is a new session and so alpn_selected should have been
1659 * initialised to NULL. We should update it with the selected ALPN.
1661 if (!ossl_assert(s->session->ext.alpn_selected == NULL)) {
1662 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1663 ERR_R_INTERNAL_ERROR);
1666 s->session->ext.alpn_selected =
1667 OPENSSL_memdup(s->s3->alpn_selected, s->s3->alpn_selected_len);
1668 if (s->session->ext.alpn_selected == NULL) {
1669 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1670 ERR_R_INTERNAL_ERROR);
1673 s->session->ext.alpn_selected_len = s->s3->alpn_selected_len;
1679 #ifndef OPENSSL_NO_SRTP
1680 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1683 unsigned int id, ct, mki;
1685 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
1686 SRTP_PROTECTION_PROFILE *prof;
1688 if (!PACKET_get_net_2(pkt, &ct) || ct != 2
1689 || !PACKET_get_net_2(pkt, &id)
1690 || !PACKET_get_1(pkt, &mki)
1691 || PACKET_remaining(pkt) != 0) {
1692 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP,
1693 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
1698 /* Must be no MKI, since we never offer one */
1699 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_USE_SRTP,
1700 SSL_R_BAD_SRTP_MKI_VALUE);
1704 /* Throw an error if the server gave us an unsolicited extension */
1705 clnt = SSL_get_srtp_profiles(s);
1707 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP,
1708 SSL_R_NO_SRTP_PROFILES);
1713 * Check to see if the server gave us something we support (and
1714 * presumably offered)
1716 for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) {
1717 prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
1719 if (prof->id == id) {
1720 s->srtp_profile = prof;
1725 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP,
1726 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
1731 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1734 /* Ignore if inappropriate ciphersuite */
1735 if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
1736 && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD
1737 && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4)
1743 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1746 s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
1748 s->session->flags |= SSL_SESS_FLAG_EXTMS;
1753 int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
1754 X509 *x, size_t chainidx)
1756 unsigned int version;
1758 if (!PACKET_get_net_2(pkt, &version)
1759 || PACKET_remaining(pkt) != 0) {
1760 SSLfatal(s, SSL_AD_DECODE_ERROR,
1761 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS,
1762 SSL_R_LENGTH_MISMATCH);
1767 * The only protocol version we support which is valid in this extension in
1768 * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else.
1770 if (version != TLS1_3_VERSION) {
1771 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1772 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS,
1773 SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1777 /* We ignore this extension for HRRs except to sanity check it */
1778 if (context == SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST)
1781 /* We just set it here. We validate it in ssl_choose_client_version */
1782 s->version = version;
1787 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1790 #ifndef OPENSSL_NO_TLS1_3
1791 unsigned int group_id;
1793 EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL;
1796 if (ckey == NULL || s->s3->peer_tmp != NULL) {
1797 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1798 ERR_R_INTERNAL_ERROR);
1802 if (!PACKET_get_net_2(pkt, &group_id)) {
1803 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1804 SSL_R_LENGTH_MISMATCH);
1808 if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) {
1809 const uint16_t *pgroups = NULL;
1810 size_t i, num_groups;
1812 if (PACKET_remaining(pkt) != 0) {
1813 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1814 SSL_R_LENGTH_MISMATCH);
1819 * It is an error if the HelloRetryRequest wants a key_share that we
1820 * already sent in the first ClientHello
1822 if (group_id == s->s3->group_id) {
1823 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1824 SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1828 /* Validate the selected group is one we support */
1829 tls1_get_supported_groups(s, &pgroups, &num_groups);
1830 for (i = 0; i < num_groups; i++) {
1831 if (group_id == pgroups[i])
1835 || !tls_curve_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED)) {
1836 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1837 SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1841 s->s3->group_id = group_id;
1842 EVP_PKEY_free(s->s3->tmp.pkey);
1843 s->s3->tmp.pkey = NULL;
1847 if (group_id != s->s3->group_id) {
1849 * This isn't for the group that we sent in the original
1852 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1853 SSL_R_BAD_KEY_SHARE);
1857 if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt)
1858 || PACKET_remaining(&encoded_pt) == 0) {
1859 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1860 SSL_R_LENGTH_MISMATCH);
1864 skey = ssl_generate_pkey(ckey);
1866 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1867 ERR_R_MALLOC_FAILURE);
1870 if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt),
1871 PACKET_remaining(&encoded_pt))) {
1872 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1874 EVP_PKEY_free(skey);
1878 if (ssl_derive(s, ckey, skey, 1) == 0) {
1879 /* SSLfatal() already called */
1880 EVP_PKEY_free(skey);
1883 s->s3->peer_tmp = skey;
1889 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1894 if (!PACKET_as_length_prefixed_2(pkt, &cookie)
1895 || !PACKET_memdup(&cookie, &s->ext.tls13_cookie,
1896 &s->ext.tls13_cookie_len)) {
1897 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_COOKIE,
1898 SSL_R_LENGTH_MISMATCH);
1905 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
1906 X509 *x, size_t chainidx)
1908 if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) {
1909 unsigned long max_early_data;
1911 if (!PACKET_get_net_4(pkt, &max_early_data)
1912 || PACKET_remaining(pkt) != 0) {
1913 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA,
1914 SSL_R_INVALID_MAX_EARLY_DATA);
1918 s->session->ext.max_early_data = max_early_data;
1923 if (PACKET_remaining(pkt) != 0) {
1924 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA,
1925 SSL_R_BAD_EXTENSION);
1929 if (!s->ext.early_data_ok
1931 || s->session->ext.tick_identity != 0) {
1933 * If we get here then we didn't send early data, or we didn't resume
1934 * using the first identity, or the SNI/ALPN is not consistent so the
1935 * server should not be accepting it.
1937 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_EARLY_DATA,
1938 SSL_R_BAD_EXTENSION);
1942 s->ext.early_data = SSL_EARLY_DATA_ACCEPTED;
1947 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1950 #ifndef OPENSSL_NO_TLS1_3
1951 unsigned int identity;
1953 if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) {
1954 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_PSK,
1955 SSL_R_LENGTH_MISMATCH);
1959 if (s->session->ext.tick_identity == (int)identity) {
1961 SSL_SESSION_free(s->psksession);
1962 s->psksession = NULL;
1966 if (s->psksession == NULL
1967 || s->psksession->ext.tick_identity != (int)identity) {
1968 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_PSK,
1969 SSL_R_BAD_PSK_IDENTITY);
1974 * If we used the external PSK for sending early_data then s->early_secret
1975 * is already set up, so don't overwrite it. Otherwise we copy the
1976 * early_secret across that we generated earlier.
1978 if ((s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY
1979 && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING)
1980 || s->session->ext.max_early_data > 0
1981 || s->psksession->ext.max_early_data == 0)
1982 memcpy(s->early_secret, s->psksession->early_secret, EVP_MAX_MD_SIZE);
1984 SSL_SESSION_free(s->session);
1985 s->session = s->psksession;
1986 s->psksession = NULL;