2 * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include "../ssl_locl.h"
12 #include "statem_locl.h"
14 static int final_renegotiate(SSL *s, unsigned int context, int sent,
16 static int init_server_name(SSL *s, unsigned int context);
17 static int final_server_name(SSL *s, unsigned int context, int sent,
20 static int final_ec_pt_formats(SSL *s, unsigned int context, int sent,
23 static int init_session_ticket(SSL *s, unsigned int context);
24 #ifndef OPENSSL_NO_OCSP
25 static int init_status_request(SSL *s, unsigned int context);
27 #ifndef OPENSSL_NO_NEXTPROTONEG
28 static int init_npn(SSL *s, unsigned int context);
30 static int init_alpn(SSL *s, unsigned int context);
31 static int final_alpn(SSL *s, unsigned int context, int sent, int *al);
32 static int init_sig_algs(SSL *s, unsigned int context);
33 static int init_certificate_authorities(SSL *s, unsigned int context);
34 static EXT_RETURN tls_construct_certificate_authorities(SSL *s, WPACKET *pkt,
39 static int tls_parse_certificate_authorities(SSL *s, PACKET *pkt,
40 unsigned int context, X509 *x,
41 size_t chainidx, int *al);
42 #ifndef OPENSSL_NO_SRP
43 static int init_srp(SSL *s, unsigned int context);
45 static int init_etm(SSL *s, unsigned int context);
46 static int init_ems(SSL *s, unsigned int context);
47 static int final_ems(SSL *s, unsigned int context, int sent, int *al);
48 static int init_psk_kex_modes(SSL *s, unsigned int context);
50 static int final_key_share(SSL *s, unsigned int context, int sent, int *al);
52 #ifndef OPENSSL_NO_SRTP
53 static int init_srtp(SSL *s, unsigned int context);
55 static int final_sig_algs(SSL *s, unsigned int context, int sent, int *al);
56 static int final_early_data(SSL *s, unsigned int context, int sent, int *al);
58 /* Structure to define a built-in extension */
59 typedef struct extensions_definition_st {
60 /* The defined type for the extension */
63 * The context that this extension applies to, e.g. what messages and
68 * Initialise extension before parsing. Always called for relevant contexts
69 * even if extension not present
71 int (*init)(SSL *s, unsigned int context);
72 /* Parse extension sent from client to server */
73 int (*parse_ctos)(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
74 size_t chainidx, int *al);
75 /* Parse extension send from server to client */
76 int (*parse_stoc)(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
77 size_t chainidx, int *al);
78 /* Construct extension sent from server to client */
79 EXT_RETURN (*construct_stoc)(SSL *s, WPACKET *pkt, unsigned int context,
80 X509 *x, size_t chainidx, int *al);
81 /* Construct extension sent from client to server */
82 EXT_RETURN (*construct_ctos)(SSL *s, WPACKET *pkt, unsigned int context,
83 X509 *x, size_t chainidx, int *al);
85 * Finalise extension after parsing. Always called where an extensions was
86 * initialised even if the extension was not present. |sent| is set to 1 if
87 * the extension was seen, or 0 otherwise.
89 int (*final)(SSL *s, unsigned int context, int sent, int *al);
90 } EXTENSION_DEFINITION;
93 * Definitions of all built-in extensions. NOTE: Changes in the number or order
94 * of these extensions should be mirrored with equivalent changes to the
95 * indexes ( TLSEXT_IDX_* ) defined in ssl_locl.h.
96 * Each extension has an initialiser, a client and
97 * server side parser and a finaliser. The initialiser is called (if the
98 * extension is relevant to the given context) even if we did not see the
99 * extension in the message that we received. The parser functions are only
100 * called if we see the extension in the message. The finalisers are always
101 * called if the initialiser was called.
102 * There are also server and client side constructor functions which are always
103 * called during message construction if the extension is relevant for the
105 * The initialisation, parsing, finalisation and construction functions are
106 * always called in the order defined in this list. Some extensions may depend
107 * on others having been processed first, so the order of this list is
109 * The extension context is defined by a series of flags which specify which
110 * messages the extension is relevant to. These flags also specify whether the
111 * extension is relevant to a particular protocol or protocol version.
113 * TODO(TLS1.3): Make sure we have a test to check the consistency of these
115 #define INVALID_EXTENSION { 0x10000, 0, NULL, NULL, NULL, NULL, NULL, NULL }
116 static const EXTENSION_DEFINITION ext_defs[] = {
118 TLSEXT_TYPE_renegotiate,
119 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
120 | SSL_EXT_SSL3_ALLOWED | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
121 NULL, tls_parse_ctos_renegotiate, tls_parse_stoc_renegotiate,
122 tls_construct_stoc_renegotiate, tls_construct_ctos_renegotiate,
126 TLSEXT_TYPE_server_name,
127 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
128 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
130 tls_parse_ctos_server_name, tls_parse_stoc_server_name,
131 tls_construct_stoc_server_name, tls_construct_ctos_server_name,
134 #ifndef OPENSSL_NO_SRP
137 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
138 init_srp, tls_parse_ctos_srp, NULL, NULL, tls_construct_ctos_srp, NULL
143 #ifndef OPENSSL_NO_EC
145 TLSEXT_TYPE_ec_point_formats,
146 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
147 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
148 NULL, tls_parse_ctos_ec_pt_formats, tls_parse_stoc_ec_pt_formats,
149 tls_construct_stoc_ec_pt_formats, tls_construct_ctos_ec_pt_formats,
153 TLSEXT_TYPE_supported_groups,
154 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
155 NULL, tls_parse_ctos_supported_groups, NULL,
156 tls_construct_stoc_supported_groups,
157 tls_construct_ctos_supported_groups, NULL
164 TLSEXT_TYPE_session_ticket,
165 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
166 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
167 init_session_ticket, tls_parse_ctos_session_ticket,
168 tls_parse_stoc_session_ticket, tls_construct_stoc_session_ticket,
169 tls_construct_ctos_session_ticket, NULL
172 TLSEXT_TYPE_signature_algorithms,
173 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST,
174 init_sig_algs, tls_parse_ctos_sig_algs,
175 tls_parse_ctos_sig_algs, tls_construct_ctos_sig_algs,
176 tls_construct_ctos_sig_algs, final_sig_algs
178 #ifndef OPENSSL_NO_OCSP
180 TLSEXT_TYPE_status_request,
181 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
182 | SSL_EXT_TLS1_3_CERTIFICATE,
183 init_status_request, tls_parse_ctos_status_request,
184 tls_parse_stoc_status_request, tls_construct_stoc_status_request,
185 tls_construct_ctos_status_request, NULL
190 #ifndef OPENSSL_NO_NEXTPROTONEG
192 TLSEXT_TYPE_next_proto_neg,
193 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
194 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
195 init_npn, tls_parse_ctos_npn, tls_parse_stoc_npn,
196 tls_construct_stoc_next_proto_neg, tls_construct_ctos_npn, NULL
203 * Must appear in this list after server_name so that finalisation
204 * happens after server_name callbacks
206 TLSEXT_TYPE_application_layer_protocol_negotiation,
207 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
208 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
209 init_alpn, tls_parse_ctos_alpn, tls_parse_stoc_alpn,
210 tls_construct_stoc_alpn, tls_construct_ctos_alpn, final_alpn
212 #ifndef OPENSSL_NO_SRTP
214 TLSEXT_TYPE_use_srtp,
215 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
216 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS | SSL_EXT_DTLS_ONLY,
217 init_srtp, tls_parse_ctos_use_srtp, tls_parse_stoc_use_srtp,
218 tls_construct_stoc_use_srtp, tls_construct_ctos_use_srtp, NULL
224 TLSEXT_TYPE_encrypt_then_mac,
225 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
226 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
227 init_etm, tls_parse_ctos_etm, tls_parse_stoc_etm,
228 tls_construct_stoc_etm, tls_construct_ctos_etm, NULL
230 #ifndef OPENSSL_NO_CT
232 TLSEXT_TYPE_signed_certificate_timestamp,
233 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
234 | SSL_EXT_TLS1_3_CERTIFICATE,
237 * No server side support for this, but can be provided by a custom
238 * extension. This is an exception to the rule that custom extensions
239 * cannot override built in ones.
241 NULL, tls_parse_stoc_sct, NULL, tls_construct_ctos_sct, NULL
247 TLSEXT_TYPE_extended_master_secret,
248 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
249 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
250 init_ems, tls_parse_ctos_ems, tls_parse_stoc_ems,
251 tls_construct_stoc_ems, tls_construct_ctos_ems, final_ems
254 TLSEXT_TYPE_supported_versions,
255 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS_IMPLEMENTATION_ONLY
256 | SSL_EXT_TLS1_3_ONLY,
258 /* Processed inline as part of version selection */
259 NULL, NULL, NULL, tls_construct_ctos_supported_versions, NULL
262 TLSEXT_TYPE_psk_kex_modes,
263 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS_IMPLEMENTATION_ONLY
264 | SSL_EXT_TLS1_3_ONLY,
265 init_psk_kex_modes, tls_parse_ctos_psk_kex_modes, NULL, NULL,
266 tls_construct_ctos_psk_kex_modes, NULL
268 #ifndef OPENSSL_NO_EC
271 * Must be in this list after supported_groups. We need that to have
272 * been parsed before we do this one.
274 TLSEXT_TYPE_key_share,
275 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_SERVER_HELLO
276 | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST | SSL_EXT_TLS_IMPLEMENTATION_ONLY
277 | SSL_EXT_TLS1_3_ONLY,
278 NULL, tls_parse_ctos_key_share, tls_parse_stoc_key_share,
279 tls_construct_stoc_key_share, tls_construct_ctos_key_share,
285 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
286 | SSL_EXT_TLS_IMPLEMENTATION_ONLY | SSL_EXT_TLS1_3_ONLY,
287 NULL, NULL, tls_parse_stoc_cookie, NULL, tls_construct_ctos_cookie,
292 * Special unsolicited ServerHello extension only used when
293 * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set
295 TLSEXT_TYPE_cryptopro_bug,
296 SSL_EXT_TLS1_2_SERVER_HELLO | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
297 NULL, NULL, NULL, tls_construct_stoc_cryptopro_bug, NULL, NULL
300 TLSEXT_TYPE_early_data,
301 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
302 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET,
303 NULL, tls_parse_ctos_early_data, tls_parse_stoc_early_data,
304 tls_construct_stoc_early_data, tls_construct_ctos_early_data,
308 TLSEXT_TYPE_certificate_authorities,
309 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
310 | SSL_EXT_TLS1_3_ONLY,
311 init_certificate_authorities,
312 tls_parse_certificate_authorities, tls_parse_certificate_authorities,
313 tls_construct_certificate_authorities,
314 tls_construct_certificate_authorities, NULL,
317 /* Must be immediately before pre_shared_key */
319 SSL_EXT_CLIENT_HELLO,
321 /* We send this, but don't read it */
322 NULL, NULL, NULL, tls_construct_ctos_padding, NULL
325 /* Required by the TLSv1.3 spec to always be the last extension */
327 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_SERVER_HELLO
328 | SSL_EXT_TLS_IMPLEMENTATION_ONLY | SSL_EXT_TLS1_3_ONLY,
329 NULL, tls_parse_ctos_psk, tls_parse_stoc_psk, tls_construct_stoc_psk,
330 tls_construct_ctos_psk, NULL
334 /* Check whether an extension's context matches the current context */
335 static int validate_context(SSL *s, unsigned int extctx, unsigned int thisctx)
337 /* Check we're allowed to use this extension in this context */
338 if ((thisctx & extctx) == 0)
341 if (SSL_IS_DTLS(s)) {
342 if ((extctx & SSL_EXT_TLS_ONLY) != 0)
344 } else if ((extctx & SSL_EXT_DTLS_ONLY) != 0) {
352 * Verify whether we are allowed to use the extension |type| in the current
353 * |context|. Returns 1 to indicate the extension is allowed or unknown or 0 to
354 * indicate the extension is not allowed. If returning 1 then |*found| is set to
355 * the definition for the extension we found.
357 static int verify_extension(SSL *s, unsigned int context, unsigned int type,
358 custom_ext_methods *meths, RAW_EXTENSION *rawexlist,
359 RAW_EXTENSION **found)
362 size_t builtin_num = OSSL_NELEM(ext_defs);
363 const EXTENSION_DEFINITION *thisext;
365 for (i = 0, thisext = ext_defs; i < builtin_num; i++, thisext++) {
366 if (type == thisext->type) {
367 if (!validate_context(s, thisext->context, context))
370 *found = &rawexlist[i];
375 /* Check the custom extensions */
378 ENDPOINT role = ENDPOINT_BOTH;
379 custom_ext_method *meth = NULL;
381 if ((context & SSL_EXT_CLIENT_HELLO) != 0)
382 role = ENDPOINT_SERVER;
383 else if ((context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0)
384 role = ENDPOINT_CLIENT;
386 meth = custom_ext_find(meths, role, type, &offset);
388 if (!validate_context(s, meth->context, context))
390 *found = &rawexlist[offset + builtin_num];
395 /* Unknown extension. We allow it */
401 * Check whether the context defined for an extension |extctx| means whether
402 * the extension is relevant for the current context |thisctx| or not. Returns
403 * 1 if the extension is relevant for this context, and 0 otherwise
405 int extension_is_relevant(SSL *s, unsigned int extctx, unsigned int thisctx)
408 && (extctx & SSL_EXT_TLS_IMPLEMENTATION_ONLY) != 0)
409 || (s->version == SSL3_VERSION
410 && (extctx & SSL_EXT_SSL3_ALLOWED) == 0)
412 && (extctx & SSL_EXT_TLS1_2_AND_BELOW_ONLY) != 0)
413 || (!SSL_IS_TLS13(s) && (extctx & SSL_EXT_TLS1_3_ONLY) != 0)
414 || (s->hit && (extctx & SSL_EXT_IGNORE_ON_RESUMPTION) != 0))
421 * Gather a list of all the extensions from the data in |packet]. |context|
422 * tells us which message this extension is for. The raw extension data is
423 * stored in |*res| on success. In the event of an error the alert type to use
424 * is stored in |*al|. We don't actually process the content of the extensions
425 * yet, except to check their types. This function also runs the initialiser
426 * functions for all known extensions if |init| is nonzero (whether we have
427 * collected them or not). If successful the caller is responsible for freeing
428 * the contents of |*res|.
430 * Per http://tools.ietf.org/html/rfc5246#section-7.4.1.4, there may not be
431 * more than one extension of the same type in a ClientHello or ServerHello.
432 * This function returns 1 if all extensions are unique and we have parsed their
433 * types, and 0 if the extensions contain duplicates, could not be successfully
434 * found, or an internal error occurred. We only check duplicates for
435 * extensions that we know about. We ignore others.
437 int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
438 RAW_EXTENSION **res, int *al, size_t *len,
441 PACKET extensions = *packet;
444 custom_ext_methods *exts = &s->cert->custext;
445 RAW_EXTENSION *raw_extensions = NULL;
446 const EXTENSION_DEFINITION *thisexd;
451 * Initialise server side custom extensions. Client side is done during
452 * construction of extensions for the ClientHello.
454 if ((context & SSL_EXT_CLIENT_HELLO) != 0)
455 custom_ext_init(&s->cert->custext);
457 num_exts = OSSL_NELEM(ext_defs) + (exts != NULL ? exts->meths_count : 0);
458 raw_extensions = OPENSSL_zalloc(num_exts * sizeof(*raw_extensions));
459 if (raw_extensions == NULL) {
460 *al = SSL_AD_INTERNAL_ERROR;
461 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, ERR_R_MALLOC_FAILURE);
466 while (PACKET_remaining(&extensions) > 0) {
467 unsigned int type, idx;
469 RAW_EXTENSION *thisex;
471 if (!PACKET_get_net_2(&extensions, &type) ||
472 !PACKET_get_length_prefixed_2(&extensions, &extension)) {
473 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, SSL_R_BAD_EXTENSION);
474 *al = SSL_AD_DECODE_ERROR;
478 * Verify this extension is allowed. We only check duplicates for
479 * extensions that we recognise. We also have a special case for the
480 * PSK extension, which must be the last one in the ClientHello.
482 if (!verify_extension(s, context, type, exts, raw_extensions, &thisex)
483 || (thisex != NULL && thisex->present == 1)
484 || (type == TLSEXT_TYPE_psk
485 && (context & SSL_EXT_CLIENT_HELLO) != 0
486 && PACKET_remaining(&extensions) != 0)) {
487 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, SSL_R_BAD_EXTENSION);
488 *al = SSL_AD_ILLEGAL_PARAMETER;
491 idx = thisex - raw_extensions;
493 * Check that we requested this extension (if appropriate). Requests can
494 * be sent in the ClientHello and CertificateRequest. Unsolicited
495 * extensions can be sent in the NewSessionTicket. We only do this for
496 * the built-in extensions. Custom extensions have a different but
497 * similar check elsewhere.
499 * - The HRR cookie extension is unsolicited
500 * - The renegotiate extension is unsolicited (the client signals
501 * support via an SCSV)
502 * - The signed_certificate_timestamp extension can be provided by a
503 * custom extension or by the built-in version. We let the extension
504 * itself handle unsolicited response checks.
506 if (idx < OSSL_NELEM(ext_defs)
507 && (context & (SSL_EXT_CLIENT_HELLO
508 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
509 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET)) == 0
510 && type != TLSEXT_TYPE_cookie
511 && type != TLSEXT_TYPE_renegotiate
512 && type != TLSEXT_TYPE_signed_certificate_timestamp
513 && (s->ext.extflags[idx] & SSL_EXT_FLAG_SENT) == 0) {
514 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, SSL_R_UNSOLICITED_EXTENSION);
515 *al = SSL_AD_UNSUPPORTED_EXTENSION;
518 if (thisex != NULL) {
519 thisex->data = extension;
522 thisex->received_order = i++;
524 s->ext.debug_cb(s, !s->server, thisex->type,
525 PACKET_data(&thisex->data),
526 PACKET_remaining(&thisex->data),
533 * Initialise all known extensions relevant to this context,
534 * whether we have found them or not
536 for (thisexd = ext_defs, i = 0; i < OSSL_NELEM(ext_defs);
538 if (thisexd->init != NULL && (thisexd->context & context) != 0
539 && extension_is_relevant(s, thisexd->context, context)
540 && !thisexd->init(s, context)) {
541 *al = SSL_AD_INTERNAL_ERROR;
547 *res = raw_extensions;
553 OPENSSL_free(raw_extensions);
558 * Runs the parser for a given extension with index |idx|. |exts| contains the
559 * list of all parsed extensions previously collected by
560 * tls_collect_extensions(). The parser is only run if it is applicable for the
561 * given |context| and the parser has not already been run. If this is for a
562 * Certificate message, then we also provide the parser with the relevant
563 * Certificate |x| and its position in the |chainidx| with 0 being the first
564 * Certificate. Returns 1 on success or 0 on failure. In the event of a failure
565 * |*al| is populated with a suitable alert code. If an extension is not present
566 * this counted as success.
568 int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
569 RAW_EXTENSION *exts, X509 *x, size_t chainidx, int *al)
571 RAW_EXTENSION *currext = &exts[idx];
572 int (*parser)(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
573 size_t chainidx, int *al) = NULL;
575 /* Skip if the extension is not present */
576 if (!currext->present)
579 /* Skip if we've already parsed this extension */
585 if (idx < OSSL_NELEM(ext_defs)) {
586 /* We are handling a built-in extension */
587 const EXTENSION_DEFINITION *extdef = &ext_defs[idx];
589 /* Check if extension is defined for our protocol. If not, skip */
590 if (!extension_is_relevant(s, extdef->context, context))
593 parser = s->server ? extdef->parse_ctos : extdef->parse_stoc;
596 return parser(s, &currext->data, context, x, chainidx, al);
599 * If the parser is NULL we fall through to the custom extension
604 /* Parse custom extensions */
605 if (custom_ext_parse(s, context, currext->type,
606 PACKET_data(&currext->data),
607 PACKET_remaining(&currext->data),
608 x, chainidx, al) <= 0)
615 * Parse all remaining extensions that have not yet been parsed. Also calls the
616 * finalisation for all extensions at the end if |fin| is nonzero, whether we
617 * collected them or not. Returns 1 for success or 0 for failure. If we are
618 * working on a Certificate message then we also pass the Certificate |x| and
619 * its position in the |chainidx|, with 0 being the first certificate. On
620 * failure, |*al| is populated with a suitable alert code.
622 int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts, X509 *x,
623 size_t chainidx, int *al, int fin)
625 size_t i, numexts = OSSL_NELEM(ext_defs);
626 const EXTENSION_DEFINITION *thisexd;
628 /* Calculate the number of extensions in the extensions list */
629 numexts += s->cert->custext.meths_count;
631 /* Parse each extension in turn */
632 for (i = 0; i < numexts; i++) {
633 if (!tls_parse_extension(s, i, context, exts, x, chainidx, al))
639 * Finalise all known extensions relevant to this context,
640 * whether we have found them or not
642 for (i = 0, thisexd = ext_defs; i < OSSL_NELEM(ext_defs);
644 if (thisexd->final != NULL && (thisexd->context & context) != 0
645 && !thisexd->final(s, context, exts[i].present, al))
653 int should_add_extension(SSL *s, unsigned int extctx, unsigned int thisctx,
656 /* Skip if not relevant for our context */
657 if ((extctx & thisctx) == 0)
660 /* Check if this extension is defined for our protocol. If not, skip */
661 if ((SSL_IS_DTLS(s) && (extctx & SSL_EXT_TLS_IMPLEMENTATION_ONLY) != 0)
662 || (s->version == SSL3_VERSION
663 && (extctx & SSL_EXT_SSL3_ALLOWED) == 0)
665 && (extctx & SSL_EXT_TLS1_2_AND_BELOW_ONLY) != 0)
667 && (extctx & SSL_EXT_TLS1_3_ONLY) != 0
668 && (thisctx & SSL_EXT_CLIENT_HELLO) == 0)
669 || ((extctx & SSL_EXT_TLS1_3_ONLY) != 0
670 && (thisctx & SSL_EXT_CLIENT_HELLO) != 0
671 && (SSL_IS_DTLS(s) || max_version < TLS1_3_VERSION)))
678 * Construct all the extensions relevant to the current |context| and write
679 * them to |pkt|. If this is an extension for a Certificate in a Certificate
680 * message, then |x| will be set to the Certificate we are handling, and
681 * |chainidx| will indicate the position in the chainidx we are processing (with
682 * 0 being the first in the chain). Returns 1 on success or 0 on failure. If a
683 * failure occurs then |al| is populated with a suitable alert code. On a
684 * failure construction stops at the first extension to fail to construct.
686 int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
687 X509 *x, size_t chainidx, int *al)
690 int min_version, max_version = 0, reason, tmpal;
691 const EXTENSION_DEFINITION *thisexd;
694 * Normally if something goes wrong during construction it's an internal
695 * error. We can always override this later.
697 tmpal = SSL_AD_INTERNAL_ERROR;
699 if (!WPACKET_start_sub_packet_u16(pkt)
701 * If extensions are of zero length then we don't even add the
702 * extensions length bytes to a ClientHello/ServerHello in SSLv3
705 (SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO)) != 0
706 && s->version == SSL3_VERSION
707 && !WPACKET_set_flags(pkt,
708 WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH))) {
709 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, ERR_R_INTERNAL_ERROR);
713 if ((context & SSL_EXT_CLIENT_HELLO) != 0) {
714 reason = ssl_get_min_max_version(s, &min_version, &max_version);
716 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, reason);
721 /* Add custom extensions first */
722 if ((context & SSL_EXT_CLIENT_HELLO) != 0) {
723 /* On the server side with initialise during ClientHello parsing */
724 custom_ext_init(&s->cert->custext);
726 if (!custom_ext_add(s, context, pkt, x, chainidx, max_version, &tmpal)) {
727 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, ERR_R_INTERNAL_ERROR);
731 for (i = 0, thisexd = ext_defs; i < OSSL_NELEM(ext_defs); i++, thisexd++) {
732 EXT_RETURN (*construct)(SSL *s, WPACKET *pkt, unsigned int context,
733 X509 *x, size_t chainidx, int *al);
736 /* Skip if not relevant for our context */
737 if (!should_add_extension(s, thisexd->context, context, max_version))
740 construct = s->server ? thisexd->construct_stoc
741 : thisexd->construct_ctos;
743 if (construct == NULL)
746 ret = construct(s, pkt, context, x, chainidx, &tmpal);
747 if (ret == EXT_RETURN_FAIL)
749 if (ret == EXT_RETURN_SENT
750 && (context & (SSL_EXT_CLIENT_HELLO
751 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
752 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET)) != 0)
753 s->ext.extflags[i] |= SSL_EXT_FLAG_SENT;
756 if (!WPACKET_close(pkt)) {
757 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, ERR_R_INTERNAL_ERROR);
769 * Built in extension finalisation and initialisation functions. All initialise
770 * or finalise the associated extension type for the given |context|. For
771 * finalisers |sent| is set to 1 if we saw the extension during parsing, and 0
772 * otherwise. These functions return 1 on success or 0 on failure. In the event
773 * of a failure then |*al| is populated with a suitable error code.
776 static int final_renegotiate(SSL *s, unsigned int context, int sent,
781 * Check if we can connect to a server that doesn't support safe
784 if (!(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
785 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)
787 *al = SSL_AD_HANDSHAKE_FAILURE;
788 SSLerr(SSL_F_FINAL_RENEGOTIATE,
789 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
796 /* Need RI if renegotiating */
798 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)
800 *al = SSL_AD_HANDSHAKE_FAILURE;
801 SSLerr(SSL_F_FINAL_RENEGOTIATE,
802 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
810 static int init_server_name(SSL *s, unsigned int context)
813 s->servername_done = 0;
818 static int final_server_name(SSL *s, unsigned int context, int sent,
821 int ret = SSL_TLSEXT_ERR_NOACK;
822 int altmp = SSL_AD_UNRECOGNIZED_NAME;
824 if (s->ctx != NULL && s->ctx->ext.servername_cb != 0)
825 ret = s->ctx->ext.servername_cb(s, &altmp,
826 s->ctx->ext.servername_arg);
827 else if (s->session_ctx != NULL
828 && s->session_ctx->ext.servername_cb != 0)
829 ret = s->session_ctx->ext.servername_cb(s, &altmp,
830 s->session_ctx->ext.servername_arg);
833 case SSL_TLSEXT_ERR_ALERT_FATAL:
837 case SSL_TLSEXT_ERR_ALERT_WARNING:
841 case SSL_TLSEXT_ERR_NOACK:
842 s->servername_done = 0;
850 #ifndef OPENSSL_NO_EC
851 static int final_ec_pt_formats(SSL *s, unsigned int context, int sent,
854 unsigned long alg_k, alg_a;
859 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
860 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
863 * If we are client and using an elliptic curve cryptography cipher
864 * suite, then if server returns an EC point formats lists extension it
865 * must contain uncompressed.
867 if (s->ext.ecpointformats != NULL
868 && s->ext.ecpointformats_len > 0
869 && s->session->ext.ecpointformats != NULL
870 && s->session->ext.ecpointformats_len > 0
871 && ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA))) {
872 /* we are using an ECC cipher */
874 unsigned char *list = s->session->ext.ecpointformats;
876 for (i = 0; i < s->session->ext.ecpointformats_len; i++) {
877 if (*list++ == TLSEXT_ECPOINTFORMAT_uncompressed)
880 if (i == s->session->ext.ecpointformats_len) {
881 SSLerr(SSL_F_FINAL_EC_PT_FORMATS,
882 SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
891 static int init_session_ticket(SSL *s, unsigned int context)
894 s->ext.ticket_expected = 0;
899 #ifndef OPENSSL_NO_OCSP
900 static int init_status_request(SSL *s, unsigned int context)
903 s->ext.status_type = TLSEXT_STATUSTYPE_nothing;
906 * Ensure we get sensible values passed to tlsext_status_cb in the event
907 * that we don't receive a status message
909 OPENSSL_free(s->ext.ocsp.resp);
910 s->ext.ocsp.resp = NULL;
911 s->ext.ocsp.resp_len = 0;
918 #ifndef OPENSSL_NO_NEXTPROTONEG
919 static int init_npn(SSL *s, unsigned int context)
927 static int init_alpn(SSL *s, unsigned int context)
929 OPENSSL_free(s->s3->alpn_selected);
930 s->s3->alpn_selected = NULL;
931 s->s3->alpn_selected_len = 0;
933 OPENSSL_free(s->s3->alpn_proposed);
934 s->s3->alpn_proposed = NULL;
935 s->s3->alpn_proposed_len = 0;
940 static int final_alpn(SSL *s, unsigned int context, int sent, int *al)
942 const unsigned char *selected = NULL;
943 unsigned char selected_len = 0;
948 if (s->ctx->ext.alpn_select_cb != NULL && s->s3->alpn_proposed != NULL) {
949 int r = s->ctx->ext.alpn_select_cb(s, &selected, &selected_len,
950 s->s3->alpn_proposed,
951 (unsigned int)s->s3->alpn_proposed_len,
952 s->ctx->ext.alpn_select_cb_arg);
954 if (r == SSL_TLSEXT_ERR_OK) {
955 OPENSSL_free(s->s3->alpn_selected);
956 s->s3->alpn_selected = OPENSSL_memdup(selected, selected_len);
957 if (s->s3->alpn_selected == NULL) {
958 *al = SSL_AD_INTERNAL_ERROR;
961 s->s3->alpn_selected_len = selected_len;
962 #ifndef OPENSSL_NO_NEXTPROTONEG
963 /* ALPN takes precedence over NPN. */
966 } else if (r == SSL_TLSEXT_ERR_NOACK) {
967 /* Behave as if no callback was present. */
970 *al = SSL_AD_NO_APPLICATION_PROTOCOL;
978 static int init_sig_algs(SSL *s, unsigned int context)
980 /* Clear any signature algorithms extension received */
981 OPENSSL_free(s->s3->tmp.peer_sigalgs);
982 s->s3->tmp.peer_sigalgs = NULL;
987 #ifndef OPENSSL_NO_SRP
988 static int init_srp(SSL *s, unsigned int context)
990 OPENSSL_free(s->srp_ctx.login);
991 s->srp_ctx.login = NULL;
997 static int init_etm(SSL *s, unsigned int context)
1004 static int init_ems(SSL *s, unsigned int context)
1007 s->s3->flags &= ~TLS1_FLAGS_RECEIVED_EXTMS;
1012 static int final_ems(SSL *s, unsigned int context, int sent, int *al)
1014 if (!s->server && s->hit) {
1016 * Check extended master secret extension is consistent with
1019 if (!(s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) !=
1020 !(s->session->flags & SSL_SESS_FLAG_EXTMS)) {
1021 *al = SSL_AD_HANDSHAKE_FAILURE;
1022 SSLerr(SSL_F_FINAL_EMS, SSL_R_INCONSISTENT_EXTMS);
1030 static int init_certificate_authorities(SSL *s, unsigned int context)
1032 sk_X509_NAME_pop_free(s->s3->tmp.peer_ca_names, X509_NAME_free);
1033 s->s3->tmp.peer_ca_names = NULL;
1037 static EXT_RETURN tls_construct_certificate_authorities(SSL *s, WPACKET *pkt,
1038 unsigned int context,
1043 const STACK_OF(X509_NAME) *ca_sk = SSL_get0_CA_list(s);
1045 if (ca_sk == NULL || sk_X509_NAME_num(ca_sk) == 0)
1046 return EXT_RETURN_NOT_SENT;
1048 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_certificate_authorities)
1049 || !WPACKET_start_sub_packet_u16(pkt)
1050 || !construct_ca_names(s, pkt)
1051 || !WPACKET_close(pkt)) {
1052 SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_AUTHORITIES,
1053 ERR_R_INTERNAL_ERROR);
1054 return EXT_RETURN_FAIL;
1057 return EXT_RETURN_SENT;
1060 static int tls_parse_certificate_authorities(SSL *s, PACKET *pkt,
1061 unsigned int context, X509 *x,
1062 size_t chainidx, int *al)
1064 if (!parse_ca_names(s, pkt, al))
1066 if (PACKET_remaining(pkt) != 0) {
1067 *al = SSL_AD_DECODE_ERROR;
1073 #ifndef OPENSSL_NO_SRTP
1074 static int init_srtp(SSL *s, unsigned int context)
1077 s->srtp_profile = NULL;
1083 static int final_sig_algs(SSL *s, unsigned int context, int sent, int *al)
1085 if (!sent && SSL_IS_TLS13(s) && !s->hit) {
1086 *al = TLS13_AD_MISSING_EXTENSION;
1087 SSLerr(SSL_F_FINAL_SIG_ALGS, SSL_R_MISSING_SIGALGS_EXTENSION);
1094 #ifndef OPENSSL_NO_EC
1095 static int final_key_share(SSL *s, unsigned int context, int sent, int *al)
1097 if (!SSL_IS_TLS13(s))
1100 /* Nothing to do for key_share in an HRR */
1101 if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0)
1108 * we have no key_share
1110 * (we are not resuming
1111 * OR the kex_mode doesn't allow non key_share resumes)
1118 || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) == 0)) {
1119 /* Nothing left we can do - just fail */
1120 *al = SSL_AD_MISSING_EXTENSION;
1121 SSLerr(SSL_F_FINAL_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE);
1128 * we have no key_share
1131 * we didn't already send a HelloRetryRequest
1133 * the client sent a key_share extension
1135 * (we are not resuming
1136 * OR the kex_mode allows key_share resumes)
1138 * a shared group exists
1140 * send a HelloRetryRequest
1142 * we are not resuming
1144 * the kex_mode doesn't allow non key_share resumes
1148 if (s->server && s->s3->peer_tmp == NULL) {
1149 /* No suitable share */
1150 if (s->hello_retry_request == 0 && sent
1152 || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE)
1154 const unsigned char *pcurves, *pcurvestmp, *clntcurves;
1155 size_t num_curves, clnt_num_curves, i;
1156 unsigned int group_id = 0;
1158 /* Check if a shared group exists */
1160 /* Get the clients list of supported groups. */
1161 if (!tls1_get_curvelist(s, 1, &clntcurves, &clnt_num_curves)) {
1162 *al = SSL_AD_INTERNAL_ERROR;
1163 SSLerr(SSL_F_FINAL_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1167 /* Get our list of available groups */
1168 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
1169 *al = SSL_AD_INTERNAL_ERROR;
1170 SSLerr(SSL_F_FINAL_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1174 /* Find the first group we allow that is also in client's list */
1175 for (i = 0, pcurvestmp = pcurves; i < num_curves;
1176 i++, pcurvestmp += 2) {
1177 group_id = bytestogroup(pcurvestmp);
1179 if (check_in_list(s, group_id, clntcurves, clnt_num_curves, 1))
1183 if (i < num_curves) {
1184 /* A shared group exists so send a HelloRetryRequest */
1185 s->s3->group_id = group_id;
1186 s->hello_retry_request = 1;
1191 || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) == 0) {
1192 /* Nothing left we can do - just fail */
1194 *al = SSL_AD_MISSING_EXTENSION;
1196 *al = SSL_AD_HANDSHAKE_FAILURE;
1197 SSLerr(SSL_F_FINAL_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE);
1202 /* We have a key_share so don't send any more HelloRetryRequest messages */
1204 s->hello_retry_request = 0;
1207 * For a client side resumption with no key_share we need to generate
1208 * the handshake secret (otherwise this is done during key_share
1211 if (!sent && !s->server && !tls13_generate_handshake_secret(s, NULL, 0)) {
1212 *al = SSL_AD_INTERNAL_ERROR;
1213 SSLerr(SSL_F_FINAL_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1221 static int init_psk_kex_modes(SSL *s, unsigned int context)
1223 s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_NONE;
1227 int tls_psk_do_binder(SSL *s, const EVP_MD *md, const unsigned char *msgstart,
1228 size_t binderoffset, const unsigned char *binderin,
1229 unsigned char *binderout, SSL_SESSION *sess, int sign,
1232 EVP_PKEY *mackey = NULL;
1233 EVP_MD_CTX *mctx = NULL;
1234 unsigned char hash[EVP_MAX_MD_SIZE], binderkey[EVP_MAX_MD_SIZE];
1235 unsigned char finishedkey[EVP_MAX_MD_SIZE], tmpbinder[EVP_MAX_MD_SIZE];
1236 unsigned char tmppsk[EVP_MAX_MD_SIZE];
1237 unsigned char *early_secret, *psk;
1238 const char resumption_label[] = "res binder";
1239 const char external_label[] = "ext binder";
1240 const char nonce_label[] = "resumption";
1242 size_t bindersize, labelsize, hashsize = EVP_MD_size(md);
1246 label = external_label;
1247 labelsize = sizeof(external_label) - 1;
1249 label = resumption_label;
1250 labelsize = sizeof(resumption_label) - 1;
1253 if (sess->master_key_length != hashsize) {
1254 SSLerr(SSL_F_TLS_PSK_DO_BINDER, SSL_R_BAD_PSK);
1259 psk = sess->master_key;
1262 if (!tls13_hkdf_expand(s, md, sess->master_key,
1263 (const unsigned char *)nonce_label,
1264 sizeof(nonce_label) - 1, sess->ext.tick_nonce,
1265 sess->ext.tick_nonce_len, psk, hashsize)) {
1266 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1272 * Generate the early_secret. On the server side we've selected a PSK to
1273 * resume with (internal or external) so we always do this. On the client
1274 * side we do this for a non-external (i.e. resumption) PSK so that it
1275 * is in place for sending early data. For client side external PSK we
1276 * generate it but store it away for later use.
1278 if (s->server || !external)
1279 early_secret = (unsigned char *)s->early_secret;
1281 early_secret = (unsigned char *)sess->early_secret;
1282 if (!tls13_generate_secret(s, md, NULL, psk, hashsize, early_secret)) {
1283 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1288 * Create the handshake hash for the binder key...the messages so far are
1291 mctx = EVP_MD_CTX_new();
1293 || EVP_DigestInit_ex(mctx, md, NULL) <= 0
1294 || EVP_DigestFinal_ex(mctx, hash, NULL) <= 0) {
1295 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1299 /* Generate the binder key */
1300 if (!tls13_hkdf_expand(s, md, early_secret, (unsigned char *)label,
1301 labelsize, hash, hashsize, binderkey, hashsize)) {
1302 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1306 /* Generate the finished key */
1307 if (!tls13_derive_finishedkey(s, md, binderkey, finishedkey, hashsize)) {
1308 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1312 if (EVP_DigestInit_ex(mctx, md, NULL) <= 0) {
1313 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1318 * Get a hash of the ClientHello up to the start of the binders. If we are
1319 * following a HelloRetryRequest then this includes the hash of the first
1320 * ClientHello and the HelloRetryRequest itself.
1322 if (s->hello_retry_request) {
1326 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
1327 if (hdatalen <= 0) {
1328 SSLerr(SSL_F_TLS_PSK_DO_BINDER, SSL_R_BAD_HANDSHAKE_LENGTH);
1333 * For servers the handshake buffer data will include the second
1334 * ClientHello - which we don't want - so we need to take that bit off.
1337 PACKET hashprefix, msg;
1339 /* Find how many bytes are left after the first two messages */
1340 if (!PACKET_buf_init(&hashprefix, hdata, hdatalen)
1341 || !PACKET_forward(&hashprefix, 1)
1342 || !PACKET_get_length_prefixed_3(&hashprefix, &msg)
1343 || !PACKET_forward(&hashprefix, 1)
1344 || !PACKET_get_length_prefixed_3(&hashprefix, &msg)) {
1345 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1348 hdatalen -= PACKET_remaining(&hashprefix);
1351 if (EVP_DigestUpdate(mctx, hdata, hdatalen) <= 0) {
1352 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1357 if (EVP_DigestUpdate(mctx, msgstart, binderoffset) <= 0
1358 || EVP_DigestFinal_ex(mctx, hash, NULL) <= 0) {
1359 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1363 mackey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, finishedkey, hashsize);
1364 if (mackey == NULL) {
1365 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1370 binderout = tmpbinder;
1372 bindersize = hashsize;
1373 if (EVP_DigestSignInit(mctx, NULL, md, NULL, mackey) <= 0
1374 || EVP_DigestSignUpdate(mctx, hash, hashsize) <= 0
1375 || EVP_DigestSignFinal(mctx, binderout, &bindersize) <= 0
1376 || bindersize != hashsize) {
1377 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1384 /* HMAC keys can't do EVP_DigestVerify* - use CRYPTO_memcmp instead */
1385 ret = (CRYPTO_memcmp(binderin, binderout, hashsize) == 0);
1389 OPENSSL_cleanse(binderkey, sizeof(binderkey));
1390 OPENSSL_cleanse(finishedkey, sizeof(finishedkey));
1391 EVP_PKEY_free(mackey);
1392 EVP_MD_CTX_free(mctx);
1397 static int final_early_data(SSL *s, unsigned int context, int sent, int *al)
1399 if (!s->server || !sent)
1402 if (s->max_early_data == 0
1404 || s->session->ext.tick_identity != 0
1405 || s->early_data_state != SSL_EARLY_DATA_ACCEPTING
1406 || !s->ext.early_data_ok
1407 || s->hello_retry_request
1408 || s->s3->alpn_selected_len != s->session->ext.alpn_selected_len
1409 || (s->s3->alpn_selected_len > 0
1410 && memcmp(s->s3->alpn_selected, s->session->ext.alpn_selected,
1411 s->s3->alpn_selected_len) != 0)) {
1412 s->ext.early_data = SSL_EARLY_DATA_REJECTED;
1414 s->ext.early_data = SSL_EARLY_DATA_ACCEPTED;
1416 if (!tls13_change_cipher_state(s,
1417 SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_SERVER_READ)) {
1418 *al = SSL_AD_INTERNAL_ERROR;