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_get_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)
142 EXT_RETURN tls_construct_ctos_ec_pt_formats(SSL *s, WPACKET *pkt,
143 unsigned int context, X509 *x,
146 const unsigned char *pformats;
150 return EXT_RETURN_NOT_SENT;
152 /* Add TLS extension ECPointFormats to the ClientHello message */
153 tls1_get_formatlist(s, &pformats, &num_formats);
155 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_ec_point_formats)
156 /* Sub-packet for formats extension */
157 || !WPACKET_start_sub_packet_u16(pkt)
158 || !WPACKET_sub_memcpy_u8(pkt, pformats, num_formats)
159 || !WPACKET_close(pkt)) {
160 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
161 SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
162 return EXT_RETURN_FAIL;
165 return EXT_RETURN_SENT;
168 EXT_RETURN tls_construct_ctos_supported_groups(SSL *s, WPACKET *pkt,
169 unsigned int context, X509 *x,
172 const uint16_t *pgroups = NULL;
173 size_t num_groups = 0, i;
176 return EXT_RETURN_NOT_SENT;
179 * Add TLS extension supported_groups to the ClientHello message
181 /* TODO(TLS1.3): Add support for DHE groups */
182 tls1_get_supported_groups(s, &pgroups, &num_groups);
184 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_groups)
185 /* Sub-packet for supported_groups extension */
186 || !WPACKET_start_sub_packet_u16(pkt)
187 || !WPACKET_start_sub_packet_u16(pkt)) {
188 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
189 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
190 ERR_R_INTERNAL_ERROR);
191 return EXT_RETURN_FAIL;
193 /* Copy curve ID if supported */
194 for (i = 0; i < num_groups; i++) {
195 uint16_t ctmp = pgroups[i];
197 if (tls_curve_allowed(s, ctmp, SSL_SECOP_CURVE_SUPPORTED)) {
198 if (!WPACKET_put_bytes_u16(pkt, ctmp)) {
199 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
200 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
201 ERR_R_INTERNAL_ERROR);
202 return EXT_RETURN_FAIL;
206 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
207 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
208 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS,
209 ERR_R_INTERNAL_ERROR);
210 return EXT_RETURN_FAIL;
213 return EXT_RETURN_SENT;
217 EXT_RETURN tls_construct_ctos_session_ticket(SSL *s, WPACKET *pkt,
218 unsigned int context, X509 *x,
223 if (!tls_use_ticket(s))
224 return EXT_RETURN_NOT_SENT;
226 if (!s->new_session && s->session != NULL
227 && s->session->ext.tick != NULL
228 && s->session->ssl_version != TLS1_3_VERSION) {
229 ticklen = s->session->ext.ticklen;
230 } else if (s->session && s->ext.session_ticket != NULL
231 && s->ext.session_ticket->data != NULL) {
232 ticklen = s->ext.session_ticket->length;
233 s->session->ext.tick = OPENSSL_malloc(ticklen);
234 if (s->session->ext.tick == NULL) {
235 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
236 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET,
237 ERR_R_INTERNAL_ERROR);
238 return EXT_RETURN_FAIL;
240 memcpy(s->session->ext.tick,
241 s->ext.session_ticket->data, ticklen);
242 s->session->ext.ticklen = ticklen;
247 if (ticklen == 0 && s->ext.session_ticket != NULL &&
248 s->ext.session_ticket->data == NULL)
249 return EXT_RETURN_NOT_SENT;
251 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_session_ticket)
252 || !WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick, ticklen)) {
253 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
254 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET, ERR_R_INTERNAL_ERROR);
255 return EXT_RETURN_FAIL;
258 return EXT_RETURN_SENT;
261 EXT_RETURN tls_construct_ctos_sig_algs(SSL *s, WPACKET *pkt,
262 unsigned int context, X509 *x,
266 const uint16_t *salg;
268 if (!SSL_CLIENT_USE_SIGALGS(s))
269 return EXT_RETURN_NOT_SENT;
271 salglen = tls12_get_psigalgs(s, 1, &salg);
272 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signature_algorithms)
273 /* Sub-packet for sig-algs extension */
274 || !WPACKET_start_sub_packet_u16(pkt)
275 /* Sub-packet for the actual list */
276 || !WPACKET_start_sub_packet_u16(pkt)
277 || !tls12_copy_sigalgs(s, pkt, salg, salglen)
278 || !WPACKET_close(pkt)
279 || !WPACKET_close(pkt)) {
280 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS,
281 ERR_R_INTERNAL_ERROR);
282 return EXT_RETURN_FAIL;
285 return EXT_RETURN_SENT;
288 #ifndef OPENSSL_NO_OCSP
289 EXT_RETURN tls_construct_ctos_status_request(SSL *s, WPACKET *pkt,
290 unsigned int context, X509 *x,
295 /* This extension isn't defined for client Certificates */
297 return EXT_RETURN_NOT_SENT;
299 if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp)
300 return EXT_RETURN_NOT_SENT;
302 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_status_request)
303 /* Sub-packet for status request extension */
304 || !WPACKET_start_sub_packet_u16(pkt)
305 || !WPACKET_put_bytes_u8(pkt, TLSEXT_STATUSTYPE_ocsp)
306 /* Sub-packet for the ids */
307 || !WPACKET_start_sub_packet_u16(pkt)) {
308 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
309 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
310 return EXT_RETURN_FAIL;
312 for (i = 0; i < sk_OCSP_RESPID_num(s->ext.ocsp.ids); i++) {
313 unsigned char *idbytes;
314 OCSP_RESPID *id = sk_OCSP_RESPID_value(s->ext.ocsp.ids, i);
315 int idlen = i2d_OCSP_RESPID(id, NULL);
318 /* Sub-packet for an individual id */
319 || !WPACKET_sub_allocate_bytes_u16(pkt, idlen, &idbytes)
320 || i2d_OCSP_RESPID(id, &idbytes) != idlen) {
321 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
322 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
323 ERR_R_INTERNAL_ERROR);
324 return EXT_RETURN_FAIL;
327 if (!WPACKET_close(pkt)
328 || !WPACKET_start_sub_packet_u16(pkt)) {
329 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
330 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
331 return EXT_RETURN_FAIL;
333 if (s->ext.ocsp.exts) {
334 unsigned char *extbytes;
335 int extlen = i2d_X509_EXTENSIONS(s->ext.ocsp.exts, NULL);
338 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
339 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
340 ERR_R_INTERNAL_ERROR);
341 return EXT_RETURN_FAIL;
343 if (!WPACKET_allocate_bytes(pkt, extlen, &extbytes)
344 || i2d_X509_EXTENSIONS(s->ext.ocsp.exts, &extbytes)
346 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
347 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST,
348 ERR_R_INTERNAL_ERROR);
349 return EXT_RETURN_FAIL;
352 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
353 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
354 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST, ERR_R_INTERNAL_ERROR);
355 return EXT_RETURN_FAIL;
358 return EXT_RETURN_SENT;
362 #ifndef OPENSSL_NO_NEXTPROTONEG
363 EXT_RETURN tls_construct_ctos_npn(SSL *s, WPACKET *pkt, unsigned int context,
364 X509 *x, size_t chainidx)
366 if (s->ctx->ext.npn_select_cb == NULL || !SSL_IS_FIRST_HANDSHAKE(s))
367 return EXT_RETURN_NOT_SENT;
370 * The client advertises an empty extension to indicate its support
371 * for Next Protocol Negotiation
373 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_next_proto_neg)
374 || !WPACKET_put_bytes_u16(pkt, 0)) {
375 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_NPN,
376 ERR_R_INTERNAL_ERROR);
377 return EXT_RETURN_FAIL;
380 return EXT_RETURN_SENT;
384 EXT_RETURN tls_construct_ctos_alpn(SSL *s, WPACKET *pkt, unsigned int context,
385 X509 *x, size_t chainidx)
387 s->s3->alpn_sent = 0;
389 if (s->ext.alpn == NULL || !SSL_IS_FIRST_HANDSHAKE(s))
390 return EXT_RETURN_NOT_SENT;
392 if (!WPACKET_put_bytes_u16(pkt,
393 TLSEXT_TYPE_application_layer_protocol_negotiation)
394 /* Sub-packet ALPN extension */
395 || !WPACKET_start_sub_packet_u16(pkt)
396 || !WPACKET_sub_memcpy_u16(pkt, s->ext.alpn, s->ext.alpn_len)
397 || !WPACKET_close(pkt)) {
398 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ALPN,
399 ERR_R_INTERNAL_ERROR);
400 return EXT_RETURN_FAIL;
402 s->s3->alpn_sent = 1;
404 return EXT_RETURN_SENT;
408 #ifndef OPENSSL_NO_SRTP
409 EXT_RETURN tls_construct_ctos_use_srtp(SSL *s, WPACKET *pkt,
410 unsigned int context, X509 *x,
413 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt = SSL_get_srtp_profiles(s);
417 return EXT_RETURN_NOT_SENT;
419 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_use_srtp)
420 /* Sub-packet for SRTP extension */
421 || !WPACKET_start_sub_packet_u16(pkt)
422 /* Sub-packet for the protection profile list */
423 || !WPACKET_start_sub_packet_u16(pkt)) {
424 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP,
425 ERR_R_INTERNAL_ERROR);
426 return EXT_RETURN_FAIL;
429 end = sk_SRTP_PROTECTION_PROFILE_num(clnt);
430 for (i = 0; i < end; i++) {
431 const SRTP_PROTECTION_PROFILE *prof =
432 sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
434 if (prof == NULL || !WPACKET_put_bytes_u16(pkt, prof->id)) {
435 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
436 SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP, ERR_R_INTERNAL_ERROR);
437 return EXT_RETURN_FAIL;
440 if (!WPACKET_close(pkt)
441 /* Add an empty use_mki value */
442 || !WPACKET_put_bytes_u8(pkt, 0)
443 || !WPACKET_close(pkt)) {
444 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP,
445 ERR_R_INTERNAL_ERROR);
446 return EXT_RETURN_FAIL;
449 return EXT_RETURN_SENT;
453 EXT_RETURN tls_construct_ctos_etm(SSL *s, WPACKET *pkt, unsigned int context,
454 X509 *x, size_t chainidx)
456 if (s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
457 return EXT_RETURN_NOT_SENT;
459 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_encrypt_then_mac)
460 || !WPACKET_put_bytes_u16(pkt, 0)) {
461 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_ETM,
462 ERR_R_INTERNAL_ERROR);
463 return EXT_RETURN_FAIL;
466 return EXT_RETURN_SENT;
469 #ifndef OPENSSL_NO_CT
470 EXT_RETURN tls_construct_ctos_sct(SSL *s, WPACKET *pkt, unsigned int context,
471 X509 *x, size_t chainidx)
473 if (s->ct_validation_callback == NULL)
474 return EXT_RETURN_NOT_SENT;
476 /* Not defined for client Certificates */
478 return EXT_RETURN_NOT_SENT;
480 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_signed_certificate_timestamp)
481 || !WPACKET_put_bytes_u16(pkt, 0)) {
482 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_SCT,
483 ERR_R_INTERNAL_ERROR);
484 return EXT_RETURN_FAIL;
487 return EXT_RETURN_SENT;
491 EXT_RETURN tls_construct_ctos_ems(SSL *s, WPACKET *pkt, unsigned int context,
492 X509 *x, size_t chainidx)
494 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_extended_master_secret)
495 || !WPACKET_put_bytes_u16(pkt, 0)) {
496 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EMS,
497 ERR_R_INTERNAL_ERROR);
498 return EXT_RETURN_FAIL;
501 return EXT_RETURN_SENT;
504 EXT_RETURN tls_construct_ctos_supported_versions(SSL *s, WPACKET *pkt,
505 unsigned int context, X509 *x,
508 int currv, min_version, max_version, reason;
510 reason = ssl_get_min_max_version(s, &min_version, &max_version);
512 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
513 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS, reason);
514 return EXT_RETURN_FAIL;
518 * Don't include this if we can't negotiate TLSv1.3. We can do a straight
519 * comparison here because we will never be called in DTLS.
521 if (max_version < TLS1_3_VERSION)
522 return EXT_RETURN_NOT_SENT;
524 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_supported_versions)
525 || !WPACKET_start_sub_packet_u16(pkt)
526 || !WPACKET_start_sub_packet_u8(pkt)) {
527 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
528 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
529 ERR_R_INTERNAL_ERROR);
530 return EXT_RETURN_FAIL;
534 * TODO(TLS1.3): There is some discussion on the TLS list as to whether
535 * we should include versions <TLS1.2. For the moment we do. To be
538 for (currv = max_version; currv >= min_version; currv--) {
539 /* TODO(TLS1.3): Remove this first if clause prior to release!! */
540 if (currv == TLS1_3_VERSION) {
541 if (!WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT)
542 || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT_27)
543 || !WPACKET_put_bytes_u16(pkt, TLS1_3_VERSION_DRAFT_26)) {
544 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
545 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
546 ERR_R_INTERNAL_ERROR);
547 return EXT_RETURN_FAIL;
549 } else if (!WPACKET_put_bytes_u16(pkt, currv)) {
550 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
551 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
552 ERR_R_INTERNAL_ERROR);
553 return EXT_RETURN_FAIL;
556 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
557 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
558 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS,
559 ERR_R_INTERNAL_ERROR);
560 return EXT_RETURN_FAIL;
563 return EXT_RETURN_SENT;
567 * Construct a psk_kex_modes extension.
569 EXT_RETURN tls_construct_ctos_psk_kex_modes(SSL *s, WPACKET *pkt,
570 unsigned int context, X509 *x,
573 #ifndef OPENSSL_NO_TLS1_3
574 int nodhe = s->options & SSL_OP_ALLOW_NO_DHE_KEX;
576 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk_kex_modes)
577 || !WPACKET_start_sub_packet_u16(pkt)
578 || !WPACKET_start_sub_packet_u8(pkt)
579 || !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE_DHE)
580 || (nodhe && !WPACKET_put_bytes_u8(pkt, TLSEXT_KEX_MODE_KE))
581 || !WPACKET_close(pkt)
582 || !WPACKET_close(pkt)) {
583 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
584 SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES, ERR_R_INTERNAL_ERROR);
585 return EXT_RETURN_FAIL;
588 s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_KE_DHE;
590 s->ext.psk_kex_mode |= TLSEXT_KEX_MODE_FLAG_KE;
593 return EXT_RETURN_SENT;
596 #ifndef OPENSSL_NO_TLS1_3
597 static int add_key_share(SSL *s, WPACKET *pkt, unsigned int curve_id)
599 unsigned char *encoded_point = NULL;
600 EVP_PKEY *key_share_key = NULL;
603 if (s->s3->tmp.pkey != NULL) {
604 if (!ossl_assert(s->hello_retry_request == SSL_HRR_PENDING)) {
605 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE,
606 ERR_R_INTERNAL_ERROR);
610 * Could happen if we got an HRR that wasn't requesting a new key_share
612 key_share_key = s->s3->tmp.pkey;
614 key_share_key = ssl_generate_pkey_group(s, curve_id);
615 if (key_share_key == NULL) {
616 /* SSLfatal() already called */
621 /* Encode the public key. */
622 encodedlen = EVP_PKEY_get1_tls_encodedpoint(key_share_key,
624 if (encodedlen == 0) {
625 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE, ERR_R_EC_LIB);
629 /* Create KeyShareEntry */
630 if (!WPACKET_put_bytes_u16(pkt, curve_id)
631 || !WPACKET_sub_memcpy_u16(pkt, encoded_point, encodedlen)) {
632 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_ADD_KEY_SHARE,
633 ERR_R_INTERNAL_ERROR);
638 * TODO(TLS1.3): When changing to send more than one key_share we're
639 * going to need to be able to save more than one EVP_PKEY. For now
640 * we reuse the existing tmp.pkey
642 s->s3->tmp.pkey = key_share_key;
643 s->s3->group_id = curve_id;
644 OPENSSL_free(encoded_point);
648 if (s->s3->tmp.pkey == NULL)
649 EVP_PKEY_free(key_share_key);
650 OPENSSL_free(encoded_point);
655 EXT_RETURN tls_construct_ctos_key_share(SSL *s, WPACKET *pkt,
656 unsigned int context, X509 *x,
659 #ifndef OPENSSL_NO_TLS1_3
660 size_t i, num_groups = 0;
661 const uint16_t *pgroups = NULL;
662 uint16_t curve_id = 0;
664 /* key_share extension */
665 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_key_share)
666 /* Extension data sub-packet */
667 || !WPACKET_start_sub_packet_u16(pkt)
668 /* KeyShare list sub-packet */
669 || !WPACKET_start_sub_packet_u16(pkt)) {
670 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,
671 ERR_R_INTERNAL_ERROR);
672 return EXT_RETURN_FAIL;
675 tls1_get_supported_groups(s, &pgroups, &num_groups);
678 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
681 if (s->s3->group_id != 0) {
682 curve_id = s->s3->group_id;
684 for (i = 0; i < num_groups; i++) {
686 if (!tls_curve_allowed(s, pgroups[i], SSL_SECOP_CURVE_SUPPORTED))
689 curve_id = pgroups[i];
695 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,
696 SSL_R_NO_SUITABLE_KEY_SHARE);
697 return EXT_RETURN_FAIL;
700 if (!add_key_share(s, pkt, curve_id)) {
701 /* SSLfatal() already called */
702 return EXT_RETURN_FAIL;
705 if (!WPACKET_close(pkt) || !WPACKET_close(pkt)) {
706 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE,
707 ERR_R_INTERNAL_ERROR);
708 return EXT_RETURN_FAIL;
710 return EXT_RETURN_SENT;
712 return EXT_RETURN_NOT_SENT;
716 EXT_RETURN tls_construct_ctos_cookie(SSL *s, WPACKET *pkt, unsigned int context,
717 X509 *x, size_t chainidx)
719 EXT_RETURN ret = EXT_RETURN_FAIL;
721 /* Should only be set if we've had an HRR */
722 if (s->ext.tls13_cookie_len == 0)
723 return EXT_RETURN_NOT_SENT;
725 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_cookie)
726 /* Extension data sub-packet */
727 || !WPACKET_start_sub_packet_u16(pkt)
728 || !WPACKET_sub_memcpy_u16(pkt, s->ext.tls13_cookie,
729 s->ext.tls13_cookie_len)
730 || !WPACKET_close(pkt)) {
731 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_COOKIE,
732 ERR_R_INTERNAL_ERROR);
736 ret = EXT_RETURN_SENT;
738 OPENSSL_free(s->ext.tls13_cookie);
739 s->ext.tls13_cookie = NULL;
740 s->ext.tls13_cookie_len = 0;
745 EXT_RETURN tls_construct_ctos_early_data(SSL *s, WPACKET *pkt,
746 unsigned int context, X509 *x,
749 #ifndef OPENSSL_NO_PSK
750 char identity[PSK_MAX_IDENTITY_LEN + 1];
751 #endif /* OPENSSL_NO_PSK */
752 const unsigned char *id = NULL;
754 SSL_SESSION *psksess = NULL;
755 SSL_SESSION *edsess = NULL;
756 const EVP_MD *handmd = NULL;
758 if (s->hello_retry_request == SSL_HRR_PENDING)
759 handmd = ssl_handshake_md(s);
761 if (s->psk_use_session_cb != NULL
762 && (!s->psk_use_session_cb(s, handmd, &id, &idlen, &psksess)
764 && psksess->ssl_version != TLS1_3_VERSION))) {
765 SSL_SESSION_free(psksess);
766 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
768 return EXT_RETURN_FAIL;
771 #ifndef OPENSSL_NO_PSK
772 if (psksess == NULL && s->psk_client_callback != NULL) {
773 unsigned char psk[PSK_MAX_PSK_LEN];
776 memset(identity, 0, sizeof(identity));
777 psklen = s->psk_client_callback(s, NULL, identity, sizeof(identity) - 1,
780 if (psklen > PSK_MAX_PSK_LEN) {
781 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
782 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR);
783 return EXT_RETURN_FAIL;
784 } else if (psklen > 0) {
785 const unsigned char tls13_aes128gcmsha256_id[] = { 0x13, 0x01 };
786 const SSL_CIPHER *cipher;
788 idlen = strlen(identity);
789 if (idlen > PSK_MAX_IDENTITY_LEN) {
790 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
791 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
792 ERR_R_INTERNAL_ERROR);
793 return EXT_RETURN_FAIL;
795 id = (unsigned char *)identity;
798 * We found a PSK using an old style callback. We don't know
799 * the digest so we default to SHA256 as per the TLSv1.3 spec
801 cipher = SSL_CIPHER_find(s, tls13_aes128gcmsha256_id);
802 if (cipher == NULL) {
803 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
804 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
805 ERR_R_INTERNAL_ERROR);
806 return EXT_RETURN_FAIL;
809 psksess = SSL_SESSION_new();
811 || !SSL_SESSION_set1_master_key(psksess, psk, psklen)
812 || !SSL_SESSION_set_cipher(psksess, cipher)
813 || !SSL_SESSION_set_protocol_version(psksess, TLS1_3_VERSION)) {
814 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
815 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
816 ERR_R_INTERNAL_ERROR);
817 OPENSSL_cleanse(psk, psklen);
818 return EXT_RETURN_FAIL;
820 OPENSSL_cleanse(psk, psklen);
823 #endif /* OPENSSL_NO_PSK */
825 SSL_SESSION_free(s->psksession);
826 s->psksession = psksess;
827 if (psksess != NULL) {
828 OPENSSL_free(s->psksession_id);
829 s->psksession_id = OPENSSL_memdup(id, idlen);
830 if (s->psksession_id == NULL) {
831 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
832 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR);
833 return EXT_RETURN_FAIL;
835 s->psksession_id_len = idlen;
838 if (s->early_data_state != SSL_EARLY_DATA_CONNECTING
839 || (s->session->ext.max_early_data == 0
840 && (psksess == NULL || psksess->ext.max_early_data == 0))) {
841 s->max_early_data = 0;
842 return EXT_RETURN_NOT_SENT;
844 edsess = s->session->ext.max_early_data != 0 ? s->session : psksess;
845 s->max_early_data = edsess->ext.max_early_data;
847 if (edsess->ext.hostname != NULL) {
848 if (s->ext.hostname == NULL
849 || (s->ext.hostname != NULL
850 && strcmp(s->ext.hostname, edsess->ext.hostname) != 0)) {
851 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
852 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
853 SSL_R_INCONSISTENT_EARLY_DATA_SNI);
854 return EXT_RETURN_FAIL;
858 if ((s->ext.alpn == NULL && edsess->ext.alpn_selected != NULL)) {
859 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
860 SSL_R_INCONSISTENT_EARLY_DATA_ALPN);
861 return EXT_RETURN_FAIL;
865 * Verify that we are offering an ALPN protocol consistent with the early
868 if (edsess->ext.alpn_selected != NULL) {
869 PACKET prots, alpnpkt;
872 if (!PACKET_buf_init(&prots, s->ext.alpn, s->ext.alpn_len)) {
873 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
874 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA, ERR_R_INTERNAL_ERROR);
875 return EXT_RETURN_FAIL;
877 while (PACKET_get_length_prefixed_1(&prots, &alpnpkt)) {
878 if (PACKET_equal(&alpnpkt, edsess->ext.alpn_selected,
879 edsess->ext.alpn_selected_len)) {
885 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
886 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
887 SSL_R_INCONSISTENT_EARLY_DATA_ALPN);
888 return EXT_RETURN_FAIL;
892 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_early_data)
893 || !WPACKET_start_sub_packet_u16(pkt)
894 || !WPACKET_close(pkt)) {
895 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA,
896 ERR_R_INTERNAL_ERROR);
897 return EXT_RETURN_FAIL;
901 * We set this to rejected here. Later, if the server acknowledges the
902 * extension, we set it to accepted.
904 s->ext.early_data = SSL_EARLY_DATA_REJECTED;
905 s->ext.early_data_ok = 1;
907 return EXT_RETURN_SENT;
910 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
911 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
914 * PSK pre binder overhead =
915 * 2 bytes for TLSEXT_TYPE_psk
916 * 2 bytes for extension length
917 * 2 bytes for identities list length
918 * 2 bytes for identity length
919 * 4 bytes for obfuscated_ticket_age
920 * 2 bytes for binder list length
921 * 1 byte for binder length
922 * The above excludes the number of bytes for the identity itself and the
923 * subsequent binder bytes
925 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
927 EXT_RETURN tls_construct_ctos_padding(SSL *s, WPACKET *pkt,
928 unsigned int context, X509 *x,
931 unsigned char *padbytes;
934 if ((s->options & SSL_OP_TLSEXT_PADDING) == 0)
935 return EXT_RETURN_NOT_SENT;
938 * Add padding to workaround bugs in F5 terminators. See RFC7685.
939 * This code calculates the length of all extensions added so far but
940 * excludes the PSK extension (because that MUST be written last). Therefore
941 * this extension MUST always appear second to last.
943 if (!WPACKET_get_total_written(pkt, &hlen)) {
944 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING,
945 ERR_R_INTERNAL_ERROR);
946 return EXT_RETURN_FAIL;
950 * If we're going to send a PSK then that will be written out after this
951 * extension, so we need to calculate how long it is going to be.
953 if (s->session->ssl_version == TLS1_3_VERSION
954 && s->session->ext.ticklen != 0
955 && s->session->cipher != NULL) {
956 const EVP_MD *md = ssl_md(s->session->cipher->algorithm2);
960 * Add the fixed PSK overhead, the identity length and the binder
963 hlen += PSK_PRE_BINDER_OVERHEAD + s->session->ext.ticklen
968 if (hlen > F5_WORKAROUND_MIN_MSG_LEN && hlen < F5_WORKAROUND_MAX_MSG_LEN) {
969 /* Calculate the amount of padding we need to add */
970 hlen = F5_WORKAROUND_MAX_MSG_LEN - hlen;
973 * Take off the size of extension header itself (2 bytes for type and
974 * 2 bytes for length bytes), but ensure that the extension is at least
975 * 1 byte long so as not to have an empty extension last (WebSphere 7.x,
976 * 8.x are intolerant of that condition)
983 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_padding)
984 || !WPACKET_sub_allocate_bytes_u16(pkt, hlen, &padbytes)) {
985 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PADDING,
986 ERR_R_INTERNAL_ERROR);
987 return EXT_RETURN_FAIL;
989 memset(padbytes, 0, hlen);
992 return EXT_RETURN_SENT;
996 * Construct the pre_shared_key extension
998 EXT_RETURN tls_construct_ctos_psk(SSL *s, WPACKET *pkt, unsigned int context,
999 X509 *x, size_t chainidx)
1001 #ifndef OPENSSL_NO_TLS1_3
1002 uint32_t now, agesec, agems = 0;
1003 size_t reshashsize = 0, pskhashsize = 0, binderoffset, msglen;
1004 unsigned char *resbinder = NULL, *pskbinder = NULL, *msgstart = NULL;
1005 const EVP_MD *handmd = NULL, *mdres = NULL, *mdpsk = NULL;
1008 s->session->ext.tick_identity = TLSEXT_PSK_BAD_IDENTITY;
1011 * Note: At this stage of the code we only support adding a single
1012 * resumption PSK. If we add support for multiple PSKs then the length
1013 * calculations in the padding extension will need to be adjusted.
1017 * If this is an incompatible or new session then we have nothing to resume
1018 * so don't add this extension.
1020 if (s->session->ssl_version != TLS1_3_VERSION
1021 || (s->session->ext.ticklen == 0 && s->psksession == NULL))
1022 return EXT_RETURN_NOT_SENT;
1024 if (s->hello_retry_request == SSL_HRR_PENDING)
1025 handmd = ssl_handshake_md(s);
1027 if (s->session->ext.ticklen != 0) {
1028 /* Get the digest associated with the ciphersuite in the session */
1029 if (s->session->cipher == NULL) {
1030 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1031 ERR_R_INTERNAL_ERROR);
1032 return EXT_RETURN_FAIL;
1034 mdres = ssl_md(s->session->cipher->algorithm2);
1035 if (mdres == NULL) {
1037 * Don't recognize this cipher so we can't use the session.
1043 if (s->hello_retry_request == SSL_HRR_PENDING && mdres != handmd) {
1045 * Selected ciphersuite hash does not match the hash for the session
1046 * so we can't use it.
1052 * Technically the C standard just says time() returns a time_t and says
1053 * nothing about the encoding of that type. In practice most
1054 * implementations follow POSIX which holds it as an integral type in
1055 * seconds since epoch. We've already made the assumption that we can do
1056 * this in multiple places in the code, so portability shouldn't be an
1059 now = (uint32_t)time(NULL);
1060 agesec = now - (uint32_t)s->session->time;
1062 * We calculate the age in seconds but the server may work in ms. Due to
1063 * rounding errors we could overestimate the age by up to 1s. It is
1064 * better to underestimate it. Otherwise, if the RTT is very short, when
1065 * the server calculates the age reported by the client it could be
1066 * bigger than the age calculated on the server - which should never
1072 if (s->session->ext.tick_lifetime_hint < agesec) {
1073 /* Ticket is too old. Ignore it. */
1078 * Calculate age in ms. We're just doing it to nearest second. Should be
1081 agems = agesec * (uint32_t)1000;
1083 if (agesec != 0 && agems / (uint32_t)1000 != agesec) {
1085 * Overflow. Shouldn't happen unless this is a *really* old session.
1086 * If so we just ignore it.
1092 * Obfuscate the age. Overflow here is fine, this addition is supposed
1095 agems += s->session->ext.tick_age_add;
1097 reshashsize = EVP_MD_size(mdres);
1102 if (!dores && s->psksession == NULL)
1103 return EXT_RETURN_NOT_SENT;
1105 if (s->psksession != NULL) {
1106 mdpsk = ssl_md(s->psksession->cipher->algorithm2);
1107 if (mdpsk == NULL) {
1109 * Don't recognize this cipher so we can't use the session.
1110 * If this happens it's an application bug.
1112 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1114 return EXT_RETURN_FAIL;
1117 if (s->hello_retry_request == SSL_HRR_PENDING && mdpsk != handmd) {
1119 * Selected ciphersuite hash does not match the hash for the PSK
1120 * session. This is an application bug.
1122 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1124 return EXT_RETURN_FAIL;
1127 pskhashsize = EVP_MD_size(mdpsk);
1130 /* Create the extension, but skip over the binder for now */
1131 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_psk)
1132 || !WPACKET_start_sub_packet_u16(pkt)
1133 || !WPACKET_start_sub_packet_u16(pkt)) {
1134 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1135 ERR_R_INTERNAL_ERROR);
1136 return EXT_RETURN_FAIL;
1140 if (!WPACKET_sub_memcpy_u16(pkt, s->session->ext.tick,
1141 s->session->ext.ticklen)
1142 || !WPACKET_put_bytes_u32(pkt, agems)) {
1143 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1144 ERR_R_INTERNAL_ERROR);
1145 return EXT_RETURN_FAIL;
1149 if (s->psksession != NULL) {
1150 if (!WPACKET_sub_memcpy_u16(pkt, s->psksession_id,
1151 s->psksession_id_len)
1152 || !WPACKET_put_bytes_u32(pkt, 0)) {
1153 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1154 ERR_R_INTERNAL_ERROR);
1155 return EXT_RETURN_FAIL;
1159 if (!WPACKET_close(pkt)
1160 || !WPACKET_get_total_written(pkt, &binderoffset)
1161 || !WPACKET_start_sub_packet_u16(pkt)
1163 && !WPACKET_sub_allocate_bytes_u8(pkt, reshashsize, &resbinder))
1164 || (s->psksession != NULL
1165 && !WPACKET_sub_allocate_bytes_u8(pkt, pskhashsize, &pskbinder))
1166 || !WPACKET_close(pkt)
1167 || !WPACKET_close(pkt)
1168 || !WPACKET_get_total_written(pkt, &msglen)
1170 * We need to fill in all the sub-packet lengths now so we can
1171 * calculate the HMAC of the message up to the binders
1173 || !WPACKET_fill_lengths(pkt)) {
1174 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_CONSTRUCT_CTOS_PSK,
1175 ERR_R_INTERNAL_ERROR);
1176 return EXT_RETURN_FAIL;
1179 msgstart = WPACKET_get_curr(pkt) - msglen;
1182 && tls_psk_do_binder(s, mdres, msgstart, binderoffset, NULL,
1183 resbinder, s->session, 1, 0) != 1) {
1184 /* SSLfatal() already called */
1185 return EXT_RETURN_FAIL;
1188 if (s->psksession != NULL
1189 && tls_psk_do_binder(s, mdpsk, msgstart, binderoffset, NULL,
1190 pskbinder, s->psksession, 1, 1) != 1) {
1191 /* SSLfatal() already called */
1192 return EXT_RETURN_FAIL;
1196 s->session->ext.tick_identity = 0;
1197 if (s->psksession != NULL)
1198 s->psksession->ext.tick_identity = (dores ? 1 : 0);
1200 return EXT_RETURN_SENT;
1202 return EXT_RETURN_NOT_SENT;
1206 EXT_RETURN tls_construct_ctos_post_handshake_auth(SSL *s, WPACKET *pkt,
1207 unsigned int context,
1208 X509 *x, size_t chainidx)
1210 #ifndef OPENSSL_NO_TLS1_3
1211 if (!s->pha_forced) {
1214 /* check for cert, if present, we can do post-handshake auth */
1215 if (s->cert == NULL)
1216 return EXT_RETURN_NOT_SENT;
1218 for (i = 0; i < SSL_PKEY_NUM; i++) {
1219 if (s->cert->pkeys[i].x509 != NULL
1220 && s->cert->pkeys[i].privatekey != NULL)
1224 /* no identity certificates, so no extension */
1226 return EXT_RETURN_NOT_SENT;
1229 /* construct extension - 0 length, no contents */
1230 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_post_handshake_auth)
1231 || !WPACKET_start_sub_packet_u16(pkt)
1232 || !WPACKET_close(pkt)) {
1233 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
1234 SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH,
1235 ERR_R_INTERNAL_ERROR);
1236 return EXT_RETURN_FAIL;
1239 s->post_handshake_auth = SSL_PHA_EXT_SENT;
1241 return EXT_RETURN_SENT;
1243 return EXT_RETURN_NOT_SENT;
1249 * Parse the server's renegotiation binding and abort if it's not right
1251 int tls_parse_stoc_renegotiate(SSL *s, PACKET *pkt, unsigned int context,
1252 X509 *x, size_t chainidx)
1254 size_t expected_len = s->s3->previous_client_finished_len
1255 + s->s3->previous_server_finished_len;
1257 const unsigned char *data;
1259 /* Check for logic errors */
1260 if (!ossl_assert(expected_len == 0
1261 || s->s3->previous_client_finished_len != 0)
1262 || !ossl_assert(expected_len == 0
1263 || s->s3->previous_server_finished_len != 0)) {
1264 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1265 ERR_R_INTERNAL_ERROR);
1269 /* Parse the length byte */
1270 if (!PACKET_get_1_len(pkt, &ilen)) {
1271 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1272 SSL_R_RENEGOTIATION_ENCODING_ERR);
1276 /* Consistency check */
1277 if (PACKET_remaining(pkt) != ilen) {
1278 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1279 SSL_R_RENEGOTIATION_ENCODING_ERR);
1283 /* Check that the extension matches */
1284 if (ilen != expected_len) {
1285 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1286 SSL_R_RENEGOTIATION_MISMATCH);
1290 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_client_finished_len)
1291 || memcmp(data, s->s3->previous_client_finished,
1292 s->s3->previous_client_finished_len) != 0) {
1293 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1294 SSL_R_RENEGOTIATION_MISMATCH);
1298 if (!PACKET_get_bytes(pkt, &data, s->s3->previous_server_finished_len)
1299 || memcmp(data, s->s3->previous_server_finished,
1300 s->s3->previous_server_finished_len) != 0) {
1301 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_RENEGOTIATE,
1302 SSL_R_RENEGOTIATION_MISMATCH);
1305 s->s3->send_connection_binding = 1;
1310 /* Parse the server's max fragment len extension packet */
1311 int tls_parse_stoc_maxfragmentlen(SSL *s, PACKET *pkt, unsigned int context,
1312 X509 *x, size_t chainidx)
1316 if (PACKET_remaining(pkt) != 1 || !PACKET_get_1(pkt, &value)) {
1317 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN,
1318 SSL_R_BAD_EXTENSION);
1322 /* |value| should contains a valid max-fragment-length code. */
1323 if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value)) {
1324 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1325 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN,
1326 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
1330 /* Must be the same value as client-configured one who was sent to server */
1332 * RFC 6066: if a client receives a maximum fragment length negotiation
1333 * response that differs from the length it requested, ...
1334 * It must abort with SSL_AD_ILLEGAL_PARAMETER alert
1336 if (value != s->ext.max_fragment_len_mode) {
1337 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1338 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN,
1339 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH);
1344 * Maximum Fragment Length Negotiation succeeded.
1345 * The negotiated Maximum Fragment Length is binding now.
1347 s->session->ext.max_fragment_len_mode = value;
1352 int tls_parse_stoc_server_name(SSL *s, PACKET *pkt, unsigned int context,
1353 X509 *x, size_t chainidx)
1355 if (s->ext.hostname == NULL) {
1356 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME,
1357 ERR_R_INTERNAL_ERROR);
1361 if (PACKET_remaining(pkt) > 0) {
1362 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME,
1363 SSL_R_BAD_EXTENSION);
1368 if (s->session->ext.hostname != NULL) {
1369 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME,
1370 ERR_R_INTERNAL_ERROR);
1373 s->session->ext.hostname = OPENSSL_strdup(s->ext.hostname);
1374 if (s->session->ext.hostname == NULL) {
1375 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SERVER_NAME,
1376 ERR_R_INTERNAL_ERROR);
1384 #ifndef OPENSSL_NO_EC
1385 int tls_parse_stoc_ec_pt_formats(SSL *s, PACKET *pkt, unsigned int context,
1386 X509 *x, size_t chainidx)
1388 size_t ecpointformats_len;
1389 PACKET ecptformatlist;
1391 if (!PACKET_as_length_prefixed_1(pkt, &ecptformatlist)) {
1392 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS,
1393 SSL_R_BAD_EXTENSION);
1397 ecpointformats_len = PACKET_remaining(&ecptformatlist);
1398 if (ecpointformats_len == 0) {
1399 SSLfatal(s, SSL_AD_DECODE_ERROR,
1400 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, SSL_R_BAD_LENGTH);
1404 s->session->ext.ecpointformats_len = 0;
1405 OPENSSL_free(s->session->ext.ecpointformats);
1406 s->session->ext.ecpointformats = OPENSSL_malloc(ecpointformats_len);
1407 if (s->session->ext.ecpointformats == NULL) {
1408 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
1409 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
1413 s->session->ext.ecpointformats_len = ecpointformats_len;
1415 if (!PACKET_copy_bytes(&ecptformatlist,
1416 s->session->ext.ecpointformats,
1417 ecpointformats_len)) {
1418 SSLfatal(s, SSL_AD_INTERNAL_ERROR,
1419 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS, ERR_R_INTERNAL_ERROR);
1428 int tls_parse_stoc_session_ticket(SSL *s, PACKET *pkt, unsigned int context,
1429 X509 *x, size_t chainidx)
1431 if (s->ext.session_ticket_cb != NULL &&
1432 !s->ext.session_ticket_cb(s, PACKET_data(pkt),
1433 PACKET_remaining(pkt),
1434 s->ext.session_ticket_cb_arg)) {
1435 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE,
1436 SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION);
1440 if (!tls_use_ticket(s)) {
1441 SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION,
1442 SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION);
1445 if (PACKET_remaining(pkt) > 0) {
1446 SSLfatal(s, SSL_AD_DECODE_ERROR,
1447 SSL_F_TLS_PARSE_STOC_SESSION_TICKET, SSL_R_BAD_EXTENSION);
1451 s->ext.ticket_expected = 1;
1456 #ifndef OPENSSL_NO_OCSP
1457 int tls_parse_stoc_status_request(SSL *s, PACKET *pkt, unsigned int context,
1458 X509 *x, size_t chainidx)
1460 if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) {
1461 /* We ignore this if the server sends a CertificateRequest */
1462 /* TODO(TLS1.3): Add support for this */
1467 * MUST only be sent if we've requested a status
1468 * request message. In TLS <= 1.2 it must also be empty.
1470 if (s->ext.status_type != TLSEXT_STATUSTYPE_ocsp) {
1471 SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION,
1472 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
1475 if (!SSL_IS_TLS13(s) && PACKET_remaining(pkt) > 0) {
1476 SSLfatal(s, SSL_AD_DECODE_ERROR,
1477 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST, SSL_R_BAD_EXTENSION);
1481 if (SSL_IS_TLS13(s)) {
1482 /* We only know how to handle this if it's for the first Certificate in
1483 * the chain. We ignore any other responses.
1488 /* SSLfatal() already called */
1489 return tls_process_cert_status_body(s, pkt);
1492 /* Set flag to expect CertificateStatus message */
1493 s->ext.status_expected = 1;
1500 #ifndef OPENSSL_NO_CT
1501 int tls_parse_stoc_sct(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1504 if (context == SSL_EXT_TLS1_3_CERTIFICATE_REQUEST) {
1505 /* We ignore this if the server sends it in a CertificateRequest */
1506 /* TODO(TLS1.3): Add support for this */
1511 * Only take it if we asked for it - i.e if there is no CT validation
1512 * callback set, then a custom extension MAY be processing it, so we
1513 * need to let control continue to flow to that.
1515 if (s->ct_validation_callback != NULL) {
1516 size_t size = PACKET_remaining(pkt);
1518 /* Simply copy it off for later processing */
1519 OPENSSL_free(s->ext.scts);
1522 s->ext.scts_len = (uint16_t)size;
1524 s->ext.scts = OPENSSL_malloc(size);
1525 if (s->ext.scts == NULL
1526 || !PACKET_copy_bytes(pkt, s->ext.scts, size)) {
1527 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_SCT,
1528 ERR_R_INTERNAL_ERROR);
1533 ENDPOINT role = (context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0
1534 ? ENDPOINT_CLIENT : ENDPOINT_BOTH;
1537 * If we didn't ask for it then there must be a custom extension,
1538 * otherwise this is unsolicited.
1540 if (custom_ext_find(&s->cert->custext, role,
1541 TLSEXT_TYPE_signed_certificate_timestamp,
1543 SSLfatal(s, TLS1_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_SCT,
1544 SSL_R_BAD_EXTENSION);
1548 if (!custom_ext_parse(s, context,
1549 TLSEXT_TYPE_signed_certificate_timestamp,
1550 PACKET_data(pkt), PACKET_remaining(pkt),
1552 /* SSLfatal already called */
1562 #ifndef OPENSSL_NO_NEXTPROTONEG
1564 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1565 * elements of zero length are allowed and the set of elements must exactly
1566 * fill the length of the block. Returns 1 on success or 0 on failure.
1568 static int ssl_next_proto_validate(SSL *s, PACKET *pkt)
1570 PACKET tmp_protocol;
1572 while (PACKET_remaining(pkt)) {
1573 if (!PACKET_get_length_prefixed_1(pkt, &tmp_protocol)
1574 || PACKET_remaining(&tmp_protocol) == 0) {
1575 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_SSL_NEXT_PROTO_VALIDATE,
1576 SSL_R_BAD_EXTENSION);
1584 int tls_parse_stoc_npn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1587 unsigned char *selected;
1588 unsigned char selected_len;
1591 /* Check if we are in a renegotiation. If so ignore this extension */
1592 if (!SSL_IS_FIRST_HANDSHAKE(s))
1595 /* We must have requested it. */
1596 if (s->ctx->ext.npn_select_cb == NULL) {
1597 SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_NPN,
1598 SSL_R_BAD_EXTENSION);
1602 /* The data must be valid */
1604 if (!ssl_next_proto_validate(s, &tmppkt)) {
1605 /* SSLfatal() already called */
1608 if (s->ctx->ext.npn_select_cb(s, &selected, &selected_len,
1610 PACKET_remaining(pkt),
1611 s->ctx->ext.npn_select_cb_arg) !=
1612 SSL_TLSEXT_ERR_OK) {
1613 SSLfatal(s, SSL_AD_HANDSHAKE_FAILURE, SSL_F_TLS_PARSE_STOC_NPN,
1614 SSL_R_BAD_EXTENSION);
1619 * Could be non-NULL if server has sent multiple NPN extensions in
1620 * a single Serverhello
1622 OPENSSL_free(s->ext.npn);
1623 s->ext.npn = OPENSSL_malloc(selected_len);
1624 if (s->ext.npn == NULL) {
1625 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_NPN,
1626 ERR_R_INTERNAL_ERROR);
1630 memcpy(s->ext.npn, selected, selected_len);
1631 s->ext.npn_len = selected_len;
1632 s->s3->npn_seen = 1;
1638 int tls_parse_stoc_alpn(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1643 /* We must have requested it. */
1644 if (!s->s3->alpn_sent) {
1645 SSLfatal(s, SSL_AD_UNSUPPORTED_EXTENSION, SSL_F_TLS_PARSE_STOC_ALPN,
1646 SSL_R_BAD_EXTENSION);
1650 * The extension data consists of:
1651 * uint16 list_length
1652 * uint8 proto_length;
1653 * uint8 proto[proto_length];
1655 if (!PACKET_get_net_2_len(pkt, &len)
1656 || PACKET_remaining(pkt) != len || !PACKET_get_1_len(pkt, &len)
1657 || PACKET_remaining(pkt) != len) {
1658 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1659 SSL_R_BAD_EXTENSION);
1662 OPENSSL_free(s->s3->alpn_selected);
1663 s->s3->alpn_selected = OPENSSL_malloc(len);
1664 if (s->s3->alpn_selected == NULL) {
1665 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1666 ERR_R_INTERNAL_ERROR);
1669 if (!PACKET_copy_bytes(pkt, s->s3->alpn_selected, len)) {
1670 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1671 SSL_R_BAD_EXTENSION);
1674 s->s3->alpn_selected_len = len;
1676 if (s->session->ext.alpn_selected == NULL
1677 || s->session->ext.alpn_selected_len != len
1678 || memcmp(s->session->ext.alpn_selected, s->s3->alpn_selected, len)
1680 /* ALPN not consistent with the old session so cannot use early_data */
1681 s->ext.early_data_ok = 0;
1685 * This is a new session and so alpn_selected should have been
1686 * initialised to NULL. We should update it with the selected ALPN.
1688 if (!ossl_assert(s->session->ext.alpn_selected == NULL)) {
1689 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1690 ERR_R_INTERNAL_ERROR);
1693 s->session->ext.alpn_selected =
1694 OPENSSL_memdup(s->s3->alpn_selected, s->s3->alpn_selected_len);
1695 if (s->session->ext.alpn_selected == NULL) {
1696 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_ALPN,
1697 ERR_R_INTERNAL_ERROR);
1700 s->session->ext.alpn_selected_len = s->s3->alpn_selected_len;
1706 #ifndef OPENSSL_NO_SRTP
1707 int tls_parse_stoc_use_srtp(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1710 unsigned int id, ct, mki;
1712 STACK_OF(SRTP_PROTECTION_PROFILE) *clnt;
1713 SRTP_PROTECTION_PROFILE *prof;
1715 if (!PACKET_get_net_2(pkt, &ct) || ct != 2
1716 || !PACKET_get_net_2(pkt, &id)
1717 || !PACKET_get_1(pkt, &mki)
1718 || PACKET_remaining(pkt) != 0) {
1719 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP,
1720 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
1725 /* Must be no MKI, since we never offer one */
1726 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_USE_SRTP,
1727 SSL_R_BAD_SRTP_MKI_VALUE);
1731 /* Throw an error if the server gave us an unsolicited extension */
1732 clnt = SSL_get_srtp_profiles(s);
1734 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP,
1735 SSL_R_NO_SRTP_PROFILES);
1740 * Check to see if the server gave us something we support (and
1741 * presumably offered)
1743 for (i = 0; i < sk_SRTP_PROTECTION_PROFILE_num(clnt); i++) {
1744 prof = sk_SRTP_PROTECTION_PROFILE_value(clnt, i);
1746 if (prof->id == id) {
1747 s->srtp_profile = prof;
1752 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_USE_SRTP,
1753 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST);
1758 int tls_parse_stoc_etm(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1761 /* Ignore if inappropriate ciphersuite */
1762 if (!(s->options & SSL_OP_NO_ENCRYPT_THEN_MAC)
1763 && s->s3->tmp.new_cipher->algorithm_mac != SSL_AEAD
1764 && s->s3->tmp.new_cipher->algorithm_enc != SSL_RC4)
1770 int tls_parse_stoc_ems(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1773 s->s3->flags |= TLS1_FLAGS_RECEIVED_EXTMS;
1775 s->session->flags |= SSL_SESS_FLAG_EXTMS;
1780 int tls_parse_stoc_supported_versions(SSL *s, PACKET *pkt, unsigned int context,
1781 X509 *x, size_t chainidx)
1783 unsigned int version;
1785 if (!PACKET_get_net_2(pkt, &version)
1786 || PACKET_remaining(pkt) != 0) {
1787 SSLfatal(s, SSL_AD_DECODE_ERROR,
1788 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS,
1789 SSL_R_LENGTH_MISMATCH);
1793 /* TODO(TLS1.3): Remove this before release */
1794 if (version == TLS1_3_VERSION_DRAFT
1795 || version == TLS1_3_VERSION_DRAFT_27
1796 || version == TLS1_3_VERSION_DRAFT_26)
1797 version = TLS1_3_VERSION;
1800 * The only protocol version we support which is valid in this extension in
1801 * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else.
1803 if (version != TLS1_3_VERSION) {
1804 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1805 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS,
1806 SSL_R_BAD_PROTOCOL_VERSION_NUMBER);
1810 /* We ignore this extension for HRRs except to sanity check it */
1811 if (context == SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST)
1814 /* We just set it here. We validate it in ssl_choose_client_version */
1815 s->version = version;
1820 int tls_parse_stoc_key_share(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1823 #ifndef OPENSSL_NO_TLS1_3
1824 unsigned int group_id;
1826 EVP_PKEY *ckey = s->s3->tmp.pkey, *skey = NULL;
1829 if (ckey == NULL || s->s3->peer_tmp != NULL) {
1830 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1831 ERR_R_INTERNAL_ERROR);
1835 if (!PACKET_get_net_2(pkt, &group_id)) {
1836 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1837 SSL_R_LENGTH_MISMATCH);
1841 if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0) {
1842 const uint16_t *pgroups = NULL;
1843 size_t i, num_groups;
1845 if (PACKET_remaining(pkt) != 0) {
1846 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1847 SSL_R_LENGTH_MISMATCH);
1852 * It is an error if the HelloRetryRequest wants a key_share that we
1853 * already sent in the first ClientHello
1855 if (group_id == s->s3->group_id) {
1856 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1857 SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1861 /* Validate the selected group is one we support */
1862 tls1_get_supported_groups(s, &pgroups, &num_groups);
1863 for (i = 0; i < num_groups; i++) {
1864 if (group_id == pgroups[i])
1868 || !tls_curve_allowed(s, group_id, SSL_SECOP_CURVE_SUPPORTED)) {
1869 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER,
1870 SSL_F_TLS_PARSE_STOC_KEY_SHARE, SSL_R_BAD_KEY_SHARE);
1874 s->s3->group_id = group_id;
1875 EVP_PKEY_free(s->s3->tmp.pkey);
1876 s->s3->tmp.pkey = NULL;
1880 if (group_id != s->s3->group_id) {
1882 * This isn't for the group that we sent in the original
1885 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1886 SSL_R_BAD_KEY_SHARE);
1890 if (!PACKET_as_length_prefixed_2(pkt, &encoded_pt)
1891 || PACKET_remaining(&encoded_pt) == 0) {
1892 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1893 SSL_R_LENGTH_MISMATCH);
1897 skey = ssl_generate_pkey(ckey);
1899 SSLfatal(s, SSL_AD_INTERNAL_ERROR, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1900 ERR_R_MALLOC_FAILURE);
1903 if (!EVP_PKEY_set1_tls_encodedpoint(skey, PACKET_data(&encoded_pt),
1904 PACKET_remaining(&encoded_pt))) {
1905 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_KEY_SHARE,
1907 EVP_PKEY_free(skey);
1911 if (ssl_derive(s, ckey, skey, 1) == 0) {
1912 /* SSLfatal() already called */
1913 EVP_PKEY_free(skey);
1916 s->s3->peer_tmp = skey;
1922 int tls_parse_stoc_cookie(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1927 if (!PACKET_as_length_prefixed_2(pkt, &cookie)
1928 || !PACKET_memdup(&cookie, &s->ext.tls13_cookie,
1929 &s->ext.tls13_cookie_len)) {
1930 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_COOKIE,
1931 SSL_R_LENGTH_MISMATCH);
1938 int tls_parse_stoc_early_data(SSL *s, PACKET *pkt, unsigned int context,
1939 X509 *x, size_t chainidx)
1941 if (context == SSL_EXT_TLS1_3_NEW_SESSION_TICKET) {
1942 unsigned long max_early_data;
1944 if (!PACKET_get_net_4(pkt, &max_early_data)
1945 || PACKET_remaining(pkt) != 0) {
1946 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA,
1947 SSL_R_INVALID_MAX_EARLY_DATA);
1951 s->session->ext.max_early_data = max_early_data;
1956 if (PACKET_remaining(pkt) != 0) {
1957 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_EARLY_DATA,
1958 SSL_R_BAD_EXTENSION);
1962 if (!s->ext.early_data_ok
1964 || s->session->ext.tick_identity != 0) {
1966 * If we get here then we didn't send early data, or we didn't resume
1967 * using the first identity, or the SNI/ALPN is not consistent so the
1968 * server should not be accepting it.
1970 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_EARLY_DATA,
1971 SSL_R_BAD_EXTENSION);
1975 s->ext.early_data = SSL_EARLY_DATA_ACCEPTED;
1980 int tls_parse_stoc_psk(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
1983 #ifndef OPENSSL_NO_TLS1_3
1984 unsigned int identity;
1986 if (!PACKET_get_net_2(pkt, &identity) || PACKET_remaining(pkt) != 0) {
1987 SSLfatal(s, SSL_AD_DECODE_ERROR, SSL_F_TLS_PARSE_STOC_PSK,
1988 SSL_R_LENGTH_MISMATCH);
1992 if (s->session->ext.tick_identity == (int)identity) {
1994 SSL_SESSION_free(s->psksession);
1995 s->psksession = NULL;
1999 if (s->psksession == NULL
2000 || s->psksession->ext.tick_identity != (int)identity) {
2001 SSLfatal(s, SSL_AD_ILLEGAL_PARAMETER, SSL_F_TLS_PARSE_STOC_PSK,
2002 SSL_R_BAD_PSK_IDENTITY);
2007 * If we used the external PSK for sending early_data then s->early_secret
2008 * is already set up, so don't overwrite it. Otherwise we copy the
2009 * early_secret across that we generated earlier.
2011 if ((s->early_data_state != SSL_EARLY_DATA_WRITE_RETRY
2012 && s->early_data_state != SSL_EARLY_DATA_FINISHED_WRITING)
2013 || s->session->ext.max_early_data > 0
2014 || s->psksession->ext.max_early_data == 0)
2015 memcpy(s->early_secret, s->psksession->early_secret, EVP_MAX_MD_SIZE);
2017 SSL_SESSION_free(s->session);
2018 s->session = s->psksession;
2019 s->psksession = NULL;