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 "internal/nelem.h"
12 #include "../ssl_locl.h"
13 #include "statem_locl.h"
15 static int final_renegotiate(SSL *s, unsigned int context, int sent,
17 static int init_server_name(SSL *s, unsigned int context);
18 static int final_server_name(SSL *s, unsigned int context, int sent,
21 static int final_ec_pt_formats(SSL *s, unsigned int context, int sent,
24 static int init_session_ticket(SSL *s, unsigned int context);
25 #ifndef OPENSSL_NO_OCSP
26 static int init_status_request(SSL *s, unsigned int context);
28 #ifndef OPENSSL_NO_NEXTPROTONEG
29 static int init_npn(SSL *s, unsigned int context);
31 static int init_alpn(SSL *s, unsigned int context);
32 static int final_alpn(SSL *s, unsigned int context, int sent, int *al);
33 static int init_sig_algs(SSL *s, unsigned int context);
34 static int init_certificate_authorities(SSL *s, unsigned int context);
35 static EXT_RETURN tls_construct_certificate_authorities(SSL *s, WPACKET *pkt,
40 static int tls_parse_certificate_authorities(SSL *s, PACKET *pkt,
41 unsigned int context, X509 *x,
42 size_t chainidx, int *al);
43 #ifndef OPENSSL_NO_SRP
44 static int init_srp(SSL *s, unsigned int context);
46 static int init_etm(SSL *s, unsigned int context);
47 static int init_ems(SSL *s, unsigned int context);
48 static int final_ems(SSL *s, unsigned int context, int sent, int *al);
49 static int init_psk_kex_modes(SSL *s, unsigned int context);
51 static int final_key_share(SSL *s, unsigned int context, int sent, int *al);
53 #ifndef OPENSSL_NO_SRTP
54 static int init_srtp(SSL *s, unsigned int context);
56 static int final_sig_algs(SSL *s, unsigned int context, int sent, int *al);
57 static int final_early_data(SSL *s, unsigned int context, int sent, int *al);
59 /* Structure to define a built-in extension */
60 typedef struct extensions_definition_st {
61 /* The defined type for the extension */
64 * The context that this extension applies to, e.g. what messages and
69 * Initialise extension before parsing. Always called for relevant contexts
70 * even if extension not present
72 int (*init)(SSL *s, unsigned int context);
73 /* Parse extension sent from client to server */
74 int (*parse_ctos)(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
75 size_t chainidx, int *al);
76 /* Parse extension send from server to client */
77 int (*parse_stoc)(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
78 size_t chainidx, int *al);
79 /* Construct extension sent from server to client */
80 EXT_RETURN (*construct_stoc)(SSL *s, WPACKET *pkt, unsigned int context,
81 X509 *x, size_t chainidx, int *al);
82 /* Construct extension sent from client to server */
83 EXT_RETURN (*construct_ctos)(SSL *s, WPACKET *pkt, unsigned int context,
84 X509 *x, size_t chainidx, int *al);
86 * Finalise extension after parsing. Always called where an extensions was
87 * initialised even if the extension was not present. |sent| is set to 1 if
88 * the extension was seen, or 0 otherwise.
90 int (*final)(SSL *s, unsigned int context, int sent, int *al);
91 } EXTENSION_DEFINITION;
94 * Definitions of all built-in extensions. NOTE: Changes in the number or order
95 * of these extensions should be mirrored with equivalent changes to the
96 * indexes ( TLSEXT_IDX_* ) defined in ssl_locl.h.
97 * Each extension has an initialiser, a client and
98 * server side parser and a finaliser. The initialiser is called (if the
99 * extension is relevant to the given context) even if we did not see the
100 * extension in the message that we received. The parser functions are only
101 * called if we see the extension in the message. The finalisers are always
102 * called if the initialiser was called.
103 * There are also server and client side constructor functions which are always
104 * called during message construction if the extension is relevant for the
106 * The initialisation, parsing, finalisation and construction functions are
107 * always called in the order defined in this list. Some extensions may depend
108 * on others having been processed first, so the order of this list is
110 * The extension context is defined by a series of flags which specify which
111 * messages the extension is relevant to. These flags also specify whether the
112 * extension is relevant to a particular protocol or protocol version.
114 * TODO(TLS1.3): Make sure we have a test to check the consistency of these
116 * NOTE: WebSphere Application Server 7+ cannot handle empty extensions at
117 * the end, keep these extensions before signature_algorithm.
119 #define INVALID_EXTENSION { 0x10000, 0, NULL, NULL, NULL, NULL, NULL, NULL }
120 static const EXTENSION_DEFINITION ext_defs[] = {
122 TLSEXT_TYPE_renegotiate,
123 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
124 | SSL_EXT_SSL3_ALLOWED | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
125 NULL, tls_parse_ctos_renegotiate, tls_parse_stoc_renegotiate,
126 tls_construct_stoc_renegotiate, tls_construct_ctos_renegotiate,
130 TLSEXT_TYPE_server_name,
131 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
132 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
134 tls_parse_ctos_server_name, tls_parse_stoc_server_name,
135 tls_construct_stoc_server_name, tls_construct_ctos_server_name,
138 #ifndef OPENSSL_NO_SRP
141 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
142 init_srp, tls_parse_ctos_srp, NULL, NULL, tls_construct_ctos_srp, NULL
147 #ifndef OPENSSL_NO_EC
149 TLSEXT_TYPE_ec_point_formats,
150 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
151 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
152 NULL, tls_parse_ctos_ec_pt_formats, tls_parse_stoc_ec_pt_formats,
153 tls_construct_stoc_ec_pt_formats, tls_construct_ctos_ec_pt_formats,
157 TLSEXT_TYPE_supported_groups,
158 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
159 NULL, tls_parse_ctos_supported_groups, NULL,
160 tls_construct_stoc_supported_groups,
161 tls_construct_ctos_supported_groups, NULL
168 TLSEXT_TYPE_session_ticket,
169 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
170 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
171 init_session_ticket, tls_parse_ctos_session_ticket,
172 tls_parse_stoc_session_ticket, tls_construct_stoc_session_ticket,
173 tls_construct_ctos_session_ticket, NULL
175 #ifndef OPENSSL_NO_OCSP
177 TLSEXT_TYPE_status_request,
178 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
179 | SSL_EXT_TLS1_3_CERTIFICATE,
180 init_status_request, tls_parse_ctos_status_request,
181 tls_parse_stoc_status_request, tls_construct_stoc_status_request,
182 tls_construct_ctos_status_request, NULL
187 #ifndef OPENSSL_NO_NEXTPROTONEG
189 TLSEXT_TYPE_next_proto_neg,
190 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
191 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
192 init_npn, tls_parse_ctos_npn, tls_parse_stoc_npn,
193 tls_construct_stoc_next_proto_neg, tls_construct_ctos_npn, NULL
200 * Must appear in this list after server_name so that finalisation
201 * happens after server_name callbacks
203 TLSEXT_TYPE_application_layer_protocol_negotiation,
204 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
205 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS,
206 init_alpn, tls_parse_ctos_alpn, tls_parse_stoc_alpn,
207 tls_construct_stoc_alpn, tls_construct_ctos_alpn, final_alpn
209 #ifndef OPENSSL_NO_SRTP
211 TLSEXT_TYPE_use_srtp,
212 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
213 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS | SSL_EXT_DTLS_ONLY,
214 init_srtp, tls_parse_ctos_use_srtp, tls_parse_stoc_use_srtp,
215 tls_construct_stoc_use_srtp, tls_construct_ctos_use_srtp, NULL
221 TLSEXT_TYPE_encrypt_then_mac,
222 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
223 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
224 init_etm, tls_parse_ctos_etm, tls_parse_stoc_etm,
225 tls_construct_stoc_etm, tls_construct_ctos_etm, NULL
227 #ifndef OPENSSL_NO_CT
229 TLSEXT_TYPE_signed_certificate_timestamp,
230 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
231 | SSL_EXT_TLS1_3_CERTIFICATE,
234 * No server side support for this, but can be provided by a custom
235 * extension. This is an exception to the rule that custom extensions
236 * cannot override built in ones.
238 NULL, tls_parse_stoc_sct, NULL, tls_construct_ctos_sct, NULL
244 TLSEXT_TYPE_extended_master_secret,
245 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO
246 | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
247 init_ems, tls_parse_ctos_ems, tls_parse_stoc_ems,
248 tls_construct_stoc_ems, tls_construct_ctos_ems, final_ems
251 TLSEXT_TYPE_signature_algorithms,
252 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST,
253 init_sig_algs, tls_parse_ctos_sig_algs,
254 tls_parse_ctos_sig_algs, tls_construct_ctos_sig_algs,
255 tls_construct_ctos_sig_algs, final_sig_algs
258 TLSEXT_TYPE_supported_versions,
259 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS_IMPLEMENTATION_ONLY
260 | SSL_EXT_TLS1_3_ONLY,
262 /* Processed inline as part of version selection */
263 NULL, NULL, NULL, tls_construct_ctos_supported_versions, NULL
266 TLSEXT_TYPE_psk_kex_modes,
267 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS_IMPLEMENTATION_ONLY
268 | SSL_EXT_TLS1_3_ONLY,
269 init_psk_kex_modes, tls_parse_ctos_psk_kex_modes, NULL, NULL,
270 tls_construct_ctos_psk_kex_modes, NULL
272 #ifndef OPENSSL_NO_EC
275 * Must be in this list after supported_groups. We need that to have
276 * been parsed before we do this one.
278 TLSEXT_TYPE_key_share,
279 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_SERVER_HELLO
280 | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST | SSL_EXT_TLS_IMPLEMENTATION_ONLY
281 | SSL_EXT_TLS1_3_ONLY,
282 NULL, tls_parse_ctos_key_share, tls_parse_stoc_key_share,
283 tls_construct_stoc_key_share, tls_construct_ctos_key_share,
289 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
290 | SSL_EXT_TLS_IMPLEMENTATION_ONLY | SSL_EXT_TLS1_3_ONLY,
291 NULL, NULL, tls_parse_stoc_cookie, NULL, tls_construct_ctos_cookie,
296 * Special unsolicited ServerHello extension only used when
297 * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set
299 TLSEXT_TYPE_cryptopro_bug,
300 SSL_EXT_TLS1_2_SERVER_HELLO | SSL_EXT_TLS1_2_AND_BELOW_ONLY,
301 NULL, NULL, NULL, tls_construct_stoc_cryptopro_bug, NULL, NULL
304 TLSEXT_TYPE_early_data,
305 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
306 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET,
307 NULL, tls_parse_ctos_early_data, tls_parse_stoc_early_data,
308 tls_construct_stoc_early_data, tls_construct_ctos_early_data,
312 TLSEXT_TYPE_certificate_authorities,
313 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
314 | SSL_EXT_TLS1_3_ONLY,
315 init_certificate_authorities,
316 tls_parse_certificate_authorities, tls_parse_certificate_authorities,
317 tls_construct_certificate_authorities,
318 tls_construct_certificate_authorities, NULL,
321 /* Must be immediately before pre_shared_key */
323 SSL_EXT_CLIENT_HELLO,
325 /* We send this, but don't read it */
326 NULL, NULL, NULL, tls_construct_ctos_padding, NULL
329 /* Required by the TLSv1.3 spec to always be the last extension */
331 SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_3_SERVER_HELLO
332 | SSL_EXT_TLS_IMPLEMENTATION_ONLY | SSL_EXT_TLS1_3_ONLY,
333 NULL, tls_parse_ctos_psk, tls_parse_stoc_psk, tls_construct_stoc_psk,
334 tls_construct_ctos_psk, NULL
338 /* Check whether an extension's context matches the current context */
339 static int validate_context(SSL *s, unsigned int extctx, unsigned int thisctx)
341 /* Check we're allowed to use this extension in this context */
342 if ((thisctx & extctx) == 0)
345 if (SSL_IS_DTLS(s)) {
346 if ((extctx & SSL_EXT_TLS_ONLY) != 0)
348 } else if ((extctx & SSL_EXT_DTLS_ONLY) != 0) {
356 * Verify whether we are allowed to use the extension |type| in the current
357 * |context|. Returns 1 to indicate the extension is allowed or unknown or 0 to
358 * indicate the extension is not allowed. If returning 1 then |*found| is set to
359 * the definition for the extension we found.
361 static int verify_extension(SSL *s, unsigned int context, unsigned int type,
362 custom_ext_methods *meths, RAW_EXTENSION *rawexlist,
363 RAW_EXTENSION **found)
366 size_t builtin_num = OSSL_NELEM(ext_defs);
367 const EXTENSION_DEFINITION *thisext;
369 for (i = 0, thisext = ext_defs; i < builtin_num; i++, thisext++) {
370 if (type == thisext->type) {
371 if (!validate_context(s, thisext->context, context))
374 *found = &rawexlist[i];
379 /* Check the custom extensions */
382 ENDPOINT role = ENDPOINT_BOTH;
383 custom_ext_method *meth = NULL;
385 if ((context & SSL_EXT_CLIENT_HELLO) != 0)
386 role = ENDPOINT_SERVER;
387 else if ((context & SSL_EXT_TLS1_2_SERVER_HELLO) != 0)
388 role = ENDPOINT_CLIENT;
390 meth = custom_ext_find(meths, role, type, &offset);
392 if (!validate_context(s, meth->context, context))
394 *found = &rawexlist[offset + builtin_num];
399 /* Unknown extension. We allow it */
405 * Check whether the context defined for an extension |extctx| means whether
406 * the extension is relevant for the current context |thisctx| or not. Returns
407 * 1 if the extension is relevant for this context, and 0 otherwise
409 int extension_is_relevant(SSL *s, unsigned int extctx, unsigned int thisctx)
412 && (extctx & SSL_EXT_TLS_IMPLEMENTATION_ONLY) != 0)
413 || (s->version == SSL3_VERSION
414 && (extctx & SSL_EXT_SSL3_ALLOWED) == 0)
416 && (extctx & SSL_EXT_TLS1_2_AND_BELOW_ONLY) != 0)
417 || (!SSL_IS_TLS13(s) && (extctx & SSL_EXT_TLS1_3_ONLY) != 0)
418 || (s->hit && (extctx & SSL_EXT_IGNORE_ON_RESUMPTION) != 0))
425 * Gather a list of all the extensions from the data in |packet]. |context|
426 * tells us which message this extension is for. The raw extension data is
427 * stored in |*res| on success. In the event of an error the alert type to use
428 * is stored in |*al|. We don't actually process the content of the extensions
429 * yet, except to check their types. This function also runs the initialiser
430 * functions for all known extensions if |init| is nonzero (whether we have
431 * collected them or not). If successful the caller is responsible for freeing
432 * the contents of |*res|.
434 * Per http://tools.ietf.org/html/rfc5246#section-7.4.1.4, there may not be
435 * more than one extension of the same type in a ClientHello or ServerHello.
436 * This function returns 1 if all extensions are unique and we have parsed their
437 * types, and 0 if the extensions contain duplicates, could not be successfully
438 * found, or an internal error occurred. We only check duplicates for
439 * extensions that we know about. We ignore others.
441 int tls_collect_extensions(SSL *s, PACKET *packet, unsigned int context,
442 RAW_EXTENSION **res, int *al, size_t *len,
445 PACKET extensions = *packet;
448 custom_ext_methods *exts = &s->cert->custext;
449 RAW_EXTENSION *raw_extensions = NULL;
450 const EXTENSION_DEFINITION *thisexd;
455 * Initialise server side custom extensions. Client side is done during
456 * construction of extensions for the ClientHello.
458 if ((context & SSL_EXT_CLIENT_HELLO) != 0)
459 custom_ext_init(&s->cert->custext);
461 num_exts = OSSL_NELEM(ext_defs) + (exts != NULL ? exts->meths_count : 0);
462 raw_extensions = OPENSSL_zalloc(num_exts * sizeof(*raw_extensions));
463 if (raw_extensions == NULL) {
464 *al = SSL_AD_INTERNAL_ERROR;
465 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, ERR_R_MALLOC_FAILURE);
470 while (PACKET_remaining(&extensions) > 0) {
471 unsigned int type, idx;
473 RAW_EXTENSION *thisex;
475 if (!PACKET_get_net_2(&extensions, &type) ||
476 !PACKET_get_length_prefixed_2(&extensions, &extension)) {
477 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, SSL_R_BAD_EXTENSION);
478 *al = SSL_AD_DECODE_ERROR;
482 * Verify this extension is allowed. We only check duplicates for
483 * extensions that we recognise. We also have a special case for the
484 * PSK extension, which must be the last one in the ClientHello.
486 if (!verify_extension(s, context, type, exts, raw_extensions, &thisex)
487 || (thisex != NULL && thisex->present == 1)
488 || (type == TLSEXT_TYPE_psk
489 && (context & SSL_EXT_CLIENT_HELLO) != 0
490 && PACKET_remaining(&extensions) != 0)) {
491 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, SSL_R_BAD_EXTENSION);
492 *al = SSL_AD_ILLEGAL_PARAMETER;
495 idx = thisex - raw_extensions;
497 * Check that we requested this extension (if appropriate). Requests can
498 * be sent in the ClientHello and CertificateRequest. Unsolicited
499 * extensions can be sent in the NewSessionTicket. We only do this for
500 * the built-in extensions. Custom extensions have a different but
501 * similar check elsewhere.
503 * - The HRR cookie extension is unsolicited
504 * - The renegotiate extension is unsolicited (the client signals
505 * support via an SCSV)
506 * - The signed_certificate_timestamp extension can be provided by a
507 * custom extension or by the built-in version. We let the extension
508 * itself handle unsolicited response checks.
510 if (idx < OSSL_NELEM(ext_defs)
511 && (context & (SSL_EXT_CLIENT_HELLO
512 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
513 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET)) == 0
514 && type != TLSEXT_TYPE_cookie
515 && type != TLSEXT_TYPE_renegotiate
516 && type != TLSEXT_TYPE_signed_certificate_timestamp
517 && (s->ext.extflags[idx] & SSL_EXT_FLAG_SENT) == 0) {
518 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS, SSL_R_UNSOLICITED_EXTENSION);
519 *al = SSL_AD_UNSUPPORTED_EXTENSION;
522 if (thisex != NULL) {
523 thisex->data = extension;
526 thisex->received_order = i++;
528 s->ext.debug_cb(s, !s->server, thisex->type,
529 PACKET_data(&thisex->data),
530 PACKET_remaining(&thisex->data),
537 * Initialise all known extensions relevant to this context,
538 * whether we have found them or not
540 for (thisexd = ext_defs, i = 0; i < OSSL_NELEM(ext_defs);
542 if (thisexd->init != NULL && (thisexd->context & context) != 0
543 && extension_is_relevant(s, thisexd->context, context)
544 && !thisexd->init(s, context)) {
545 *al = SSL_AD_INTERNAL_ERROR;
551 *res = raw_extensions;
557 OPENSSL_free(raw_extensions);
562 * Runs the parser for a given extension with index |idx|. |exts| contains the
563 * list of all parsed extensions previously collected by
564 * tls_collect_extensions(). The parser is only run if it is applicable for the
565 * given |context| and the parser has not already been run. If this is for a
566 * Certificate message, then we also provide the parser with the relevant
567 * Certificate |x| and its position in the |chainidx| with 0 being the first
568 * Certificate. Returns 1 on success or 0 on failure. In the event of a failure
569 * |*al| is populated with a suitable alert code. If an extension is not present
570 * this counted as success.
572 int tls_parse_extension(SSL *s, TLSEXT_INDEX idx, int context,
573 RAW_EXTENSION *exts, X509 *x, size_t chainidx, int *al)
575 RAW_EXTENSION *currext = &exts[idx];
576 int (*parser)(SSL *s, PACKET *pkt, unsigned int context, X509 *x,
577 size_t chainidx, int *al) = NULL;
579 /* Skip if the extension is not present */
580 if (!currext->present)
583 /* Skip if we've already parsed this extension */
589 if (idx < OSSL_NELEM(ext_defs)) {
590 /* We are handling a built-in extension */
591 const EXTENSION_DEFINITION *extdef = &ext_defs[idx];
593 /* Check if extension is defined for our protocol. If not, skip */
594 if (!extension_is_relevant(s, extdef->context, context))
597 parser = s->server ? extdef->parse_ctos : extdef->parse_stoc;
600 return parser(s, &currext->data, context, x, chainidx, al);
603 * If the parser is NULL we fall through to the custom extension
608 /* Parse custom extensions */
609 if (custom_ext_parse(s, context, currext->type,
610 PACKET_data(&currext->data),
611 PACKET_remaining(&currext->data),
612 x, chainidx, al) <= 0)
619 * Parse all remaining extensions that have not yet been parsed. Also calls the
620 * finalisation for all extensions at the end if |fin| is nonzero, whether we
621 * collected them or not. Returns 1 for success or 0 for failure. If we are
622 * working on a Certificate message then we also pass the Certificate |x| and
623 * its position in the |chainidx|, with 0 being the first certificate. On
624 * failure, |*al| is populated with a suitable alert code.
626 int tls_parse_all_extensions(SSL *s, int context, RAW_EXTENSION *exts, X509 *x,
627 size_t chainidx, int *al, int fin)
629 size_t i, numexts = OSSL_NELEM(ext_defs);
630 const EXTENSION_DEFINITION *thisexd;
632 /* Calculate the number of extensions in the extensions list */
633 numexts += s->cert->custext.meths_count;
635 /* Parse each extension in turn */
636 for (i = 0; i < numexts; i++) {
637 if (!tls_parse_extension(s, i, context, exts, x, chainidx, al))
643 * Finalise all known extensions relevant to this context,
644 * whether we have found them or not
646 for (i = 0, thisexd = ext_defs; i < OSSL_NELEM(ext_defs);
648 if (thisexd->final != NULL && (thisexd->context & context) != 0
649 && !thisexd->final(s, context, exts[i].present, al))
657 int should_add_extension(SSL *s, unsigned int extctx, unsigned int thisctx,
660 /* Skip if not relevant for our context */
661 if ((extctx & thisctx) == 0)
664 /* Check if this extension is defined for our protocol. If not, skip */
665 if ((SSL_IS_DTLS(s) && (extctx & SSL_EXT_TLS_IMPLEMENTATION_ONLY) != 0)
666 || (s->version == SSL3_VERSION
667 && (extctx & SSL_EXT_SSL3_ALLOWED) == 0)
669 && (extctx & SSL_EXT_TLS1_2_AND_BELOW_ONLY) != 0)
671 && (extctx & SSL_EXT_TLS1_3_ONLY) != 0
672 && (thisctx & SSL_EXT_CLIENT_HELLO) == 0)
673 || ((extctx & SSL_EXT_TLS1_3_ONLY) != 0
674 && (thisctx & SSL_EXT_CLIENT_HELLO) != 0
675 && (SSL_IS_DTLS(s) || max_version < TLS1_3_VERSION)))
682 * Construct all the extensions relevant to the current |context| and write
683 * them to |pkt|. If this is an extension for a Certificate in a Certificate
684 * message, then |x| will be set to the Certificate we are handling, and
685 * |chainidx| will indicate the position in the chainidx we are processing (with
686 * 0 being the first in the chain). Returns 1 on success or 0 on failure. If a
687 * failure occurs then |al| is populated with a suitable alert code. On a
688 * failure construction stops at the first extension to fail to construct.
690 int tls_construct_extensions(SSL *s, WPACKET *pkt, unsigned int context,
691 X509 *x, size_t chainidx, int *al)
694 int min_version, max_version = 0, reason, tmpal;
695 const EXTENSION_DEFINITION *thisexd;
698 * Normally if something goes wrong during construction it's an internal
699 * error. We can always override this later.
701 tmpal = SSL_AD_INTERNAL_ERROR;
703 if (!WPACKET_start_sub_packet_u16(pkt)
705 * If extensions are of zero length then we don't even add the
706 * extensions length bytes to a ClientHello/ServerHello
710 (SSL_EXT_CLIENT_HELLO | SSL_EXT_TLS1_2_SERVER_HELLO)) != 0
711 && !WPACKET_set_flags(pkt,
712 WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH))) {
713 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, ERR_R_INTERNAL_ERROR);
717 if ((context & SSL_EXT_CLIENT_HELLO) != 0) {
718 reason = ssl_get_min_max_version(s, &min_version, &max_version);
720 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, reason);
725 /* Add custom extensions first */
726 if ((context & SSL_EXT_CLIENT_HELLO) != 0) {
727 /* On the server side with initialise during ClientHello parsing */
728 custom_ext_init(&s->cert->custext);
730 if (!custom_ext_add(s, context, pkt, x, chainidx, max_version, &tmpal)) {
731 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, ERR_R_INTERNAL_ERROR);
735 for (i = 0, thisexd = ext_defs; i < OSSL_NELEM(ext_defs); i++, thisexd++) {
736 EXT_RETURN (*construct)(SSL *s, WPACKET *pkt, unsigned int context,
737 X509 *x, size_t chainidx, int *al);
740 /* Skip if not relevant for our context */
741 if (!should_add_extension(s, thisexd->context, context, max_version))
744 construct = s->server ? thisexd->construct_stoc
745 : thisexd->construct_ctos;
747 if (construct == NULL)
750 ret = construct(s, pkt, context, x, chainidx, &tmpal);
751 if (ret == EXT_RETURN_FAIL)
753 if (ret == EXT_RETURN_SENT
754 && (context & (SSL_EXT_CLIENT_HELLO
755 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
756 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET)) != 0)
757 s->ext.extflags[i] |= SSL_EXT_FLAG_SENT;
760 if (!WPACKET_close(pkt)) {
761 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS, ERR_R_INTERNAL_ERROR);
773 * Built in extension finalisation and initialisation functions. All initialise
774 * or finalise the associated extension type for the given |context|. For
775 * finalisers |sent| is set to 1 if we saw the extension during parsing, and 0
776 * otherwise. These functions return 1 on success or 0 on failure. In the event
777 * of a failure then |*al| is populated with a suitable error code.
780 static int final_renegotiate(SSL *s, unsigned int context, int sent,
785 * Check if we can connect to a server that doesn't support safe
788 if (!(s->options & SSL_OP_LEGACY_SERVER_CONNECT)
789 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)
791 *al = SSL_AD_HANDSHAKE_FAILURE;
792 SSLerr(SSL_F_FINAL_RENEGOTIATE,
793 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
800 /* Need RI if renegotiating */
802 && !(s->options & SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION)
804 *al = SSL_AD_HANDSHAKE_FAILURE;
805 SSLerr(SSL_F_FINAL_RENEGOTIATE,
806 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED);
814 static int init_server_name(SSL *s, unsigned int context)
817 s->servername_done = 0;
822 static int final_server_name(SSL *s, unsigned int context, int sent,
825 int ret = SSL_TLSEXT_ERR_NOACK;
826 int altmp = SSL_AD_UNRECOGNIZED_NAME;
828 if (s->ctx != NULL && s->ctx->ext.servername_cb != 0)
829 ret = s->ctx->ext.servername_cb(s, &altmp,
830 s->ctx->ext.servername_arg);
831 else if (s->session_ctx != NULL
832 && s->session_ctx->ext.servername_cb != 0)
833 ret = s->session_ctx->ext.servername_cb(s, &altmp,
834 s->session_ctx->ext.servername_arg);
837 case SSL_TLSEXT_ERR_ALERT_FATAL:
841 case SSL_TLSEXT_ERR_ALERT_WARNING:
845 case SSL_TLSEXT_ERR_NOACK:
846 s->servername_done = 0;
847 if (s->server && s->session->ext.hostname != NULL)
848 s->ext.early_data_ok = 0;
856 #ifndef OPENSSL_NO_EC
857 static int final_ec_pt_formats(SSL *s, unsigned int context, int sent,
860 unsigned long alg_k, alg_a;
865 alg_k = s->s3->tmp.new_cipher->algorithm_mkey;
866 alg_a = s->s3->tmp.new_cipher->algorithm_auth;
869 * If we are client and using an elliptic curve cryptography cipher
870 * suite, then if server returns an EC point formats lists extension it
871 * must contain uncompressed.
873 if (s->ext.ecpointformats != NULL
874 && s->ext.ecpointformats_len > 0
875 && s->session->ext.ecpointformats != NULL
876 && s->session->ext.ecpointformats_len > 0
877 && ((alg_k & SSL_kECDHE) || (alg_a & SSL_aECDSA))) {
878 /* we are using an ECC cipher */
880 unsigned char *list = s->session->ext.ecpointformats;
882 for (i = 0; i < s->session->ext.ecpointformats_len; i++) {
883 if (*list++ == TLSEXT_ECPOINTFORMAT_uncompressed)
886 if (i == s->session->ext.ecpointformats_len) {
887 SSLerr(SSL_F_FINAL_EC_PT_FORMATS,
888 SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST);
897 static int init_session_ticket(SSL *s, unsigned int context)
900 s->ext.ticket_expected = 0;
905 #ifndef OPENSSL_NO_OCSP
906 static int init_status_request(SSL *s, unsigned int context)
909 s->ext.status_type = TLSEXT_STATUSTYPE_nothing;
912 * Ensure we get sensible values passed to tlsext_status_cb in the event
913 * that we don't receive a status message
915 OPENSSL_free(s->ext.ocsp.resp);
916 s->ext.ocsp.resp = NULL;
917 s->ext.ocsp.resp_len = 0;
924 #ifndef OPENSSL_NO_NEXTPROTONEG
925 static int init_npn(SSL *s, unsigned int context)
933 static int init_alpn(SSL *s, unsigned int context)
935 OPENSSL_free(s->s3->alpn_selected);
936 s->s3->alpn_selected = NULL;
937 s->s3->alpn_selected_len = 0;
939 OPENSSL_free(s->s3->alpn_proposed);
940 s->s3->alpn_proposed = NULL;
941 s->s3->alpn_proposed_len = 0;
946 static int final_alpn(SSL *s, unsigned int context, int sent, int *al)
948 if (!s->server && !sent && s->session->ext.alpn_selected != NULL)
949 s->ext.early_data_ok = 0;
951 if (!s->server || !SSL_IS_TLS13(s))
955 * Call alpn_select callback if needed. Has to be done after SNI and
956 * cipher negotiation (HTTP/2 restricts permitted ciphers). In TLSv1.3
957 * we also have to do this before we decide whether to accept early_data.
958 * In TLSv1.3 we've already negotiated our cipher so we do this call now.
959 * For < TLSv1.3 we defer it until after cipher negotiation.
961 return tls_handle_alpn(s, al);
964 static int init_sig_algs(SSL *s, unsigned int context)
966 /* Clear any signature algorithms extension received */
967 OPENSSL_free(s->s3->tmp.peer_sigalgs);
968 s->s3->tmp.peer_sigalgs = NULL;
973 #ifndef OPENSSL_NO_SRP
974 static int init_srp(SSL *s, unsigned int context)
976 OPENSSL_free(s->srp_ctx.login);
977 s->srp_ctx.login = NULL;
983 static int init_etm(SSL *s, unsigned int context)
990 static int init_ems(SSL *s, unsigned int context)
993 s->s3->flags &= ~TLS1_FLAGS_RECEIVED_EXTMS;
998 static int final_ems(SSL *s, unsigned int context, int sent, int *al)
1000 if (!s->server && s->hit) {
1002 * Check extended master secret extension is consistent with
1005 if (!(s->s3->flags & TLS1_FLAGS_RECEIVED_EXTMS) !=
1006 !(s->session->flags & SSL_SESS_FLAG_EXTMS)) {
1007 *al = SSL_AD_HANDSHAKE_FAILURE;
1008 SSLerr(SSL_F_FINAL_EMS, SSL_R_INCONSISTENT_EXTMS);
1016 static int init_certificate_authorities(SSL *s, unsigned int context)
1018 sk_X509_NAME_pop_free(s->s3->tmp.peer_ca_names, X509_NAME_free);
1019 s->s3->tmp.peer_ca_names = NULL;
1023 static EXT_RETURN tls_construct_certificate_authorities(SSL *s, WPACKET *pkt,
1024 unsigned int context,
1029 const STACK_OF(X509_NAME) *ca_sk = SSL_get0_CA_list(s);
1031 if (ca_sk == NULL || sk_X509_NAME_num(ca_sk) == 0)
1032 return EXT_RETURN_NOT_SENT;
1034 if (!WPACKET_put_bytes_u16(pkt, TLSEXT_TYPE_certificate_authorities)
1035 || !WPACKET_start_sub_packet_u16(pkt)
1036 || !construct_ca_names(s, pkt)
1037 || !WPACKET_close(pkt)) {
1038 SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_AUTHORITIES,
1039 ERR_R_INTERNAL_ERROR);
1040 return EXT_RETURN_FAIL;
1043 return EXT_RETURN_SENT;
1046 static int tls_parse_certificate_authorities(SSL *s, PACKET *pkt,
1047 unsigned int context, X509 *x,
1048 size_t chainidx, int *al)
1050 if (!parse_ca_names(s, pkt, al))
1052 if (PACKET_remaining(pkt) != 0) {
1053 *al = SSL_AD_DECODE_ERROR;
1059 #ifndef OPENSSL_NO_SRTP
1060 static int init_srtp(SSL *s, unsigned int context)
1063 s->srtp_profile = NULL;
1069 static int final_sig_algs(SSL *s, unsigned int context, int sent, int *al)
1071 if (!sent && SSL_IS_TLS13(s) && !s->hit) {
1072 *al = TLS13_AD_MISSING_EXTENSION;
1073 SSLerr(SSL_F_FINAL_SIG_ALGS, SSL_R_MISSING_SIGALGS_EXTENSION);
1080 #ifndef OPENSSL_NO_EC
1081 static int final_key_share(SSL *s, unsigned int context, int sent, int *al)
1083 if (!SSL_IS_TLS13(s))
1086 /* Nothing to do for key_share in an HRR */
1087 if ((context & SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST) != 0)
1094 * we have no key_share
1096 * (we are not resuming
1097 * OR the kex_mode doesn't allow non key_share resumes)
1104 || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) == 0)) {
1105 /* Nothing left we can do - just fail */
1106 *al = SSL_AD_MISSING_EXTENSION;
1107 SSLerr(SSL_F_FINAL_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE);
1114 * we have no key_share
1117 * we didn't already send a HelloRetryRequest
1119 * the client sent a key_share extension
1121 * (we are not resuming
1122 * OR the kex_mode allows key_share resumes)
1124 * a shared group exists
1126 * send a HelloRetryRequest
1128 * we are not resuming
1130 * the kex_mode doesn't allow non key_share resumes
1134 if (s->server && s->s3->peer_tmp == NULL) {
1135 /* No suitable share */
1136 if (s->hello_retry_request == 0 && sent
1138 || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE_DHE)
1140 const uint16_t *pcurves, *clntcurves;
1141 size_t num_curves, clnt_num_curves, i;
1142 unsigned int group_id = 0;
1144 /* Check if a shared group exists */
1146 /* Get the clients list of supported groups. */
1147 if (!tls1_get_curvelist(s, 1, &clntcurves, &clnt_num_curves)) {
1148 *al = SSL_AD_INTERNAL_ERROR;
1149 SSLerr(SSL_F_FINAL_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1153 /* Get our list of available groups */
1154 if (!tls1_get_curvelist(s, 0, &pcurves, &num_curves)) {
1155 *al = SSL_AD_INTERNAL_ERROR;
1156 SSLerr(SSL_F_FINAL_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1160 /* Find the first group we allow that is also in client's list */
1161 for (i = 0; i < num_curves; i++) {
1162 group_id = pcurves[i];
1164 if (check_in_list(s, group_id, clntcurves, clnt_num_curves, 1))
1168 if (i < num_curves) {
1169 /* A shared group exists so send a HelloRetryRequest */
1170 s->s3->group_id = group_id;
1171 s->hello_retry_request = 1;
1176 || (s->ext.psk_kex_mode & TLSEXT_KEX_MODE_FLAG_KE) == 0) {
1177 /* Nothing left we can do - just fail */
1179 *al = SSL_AD_MISSING_EXTENSION;
1181 *al = SSL_AD_HANDSHAKE_FAILURE;
1182 SSLerr(SSL_F_FINAL_KEY_SHARE, SSL_R_NO_SUITABLE_KEY_SHARE);
1187 /* We have a key_share so don't send any more HelloRetryRequest messages */
1189 s->hello_retry_request = 0;
1192 * For a client side resumption with no key_share we need to generate
1193 * the handshake secret (otherwise this is done during key_share
1196 if (!sent && !s->server && !tls13_generate_handshake_secret(s, NULL, 0)) {
1197 *al = SSL_AD_INTERNAL_ERROR;
1198 SSLerr(SSL_F_FINAL_KEY_SHARE, ERR_R_INTERNAL_ERROR);
1206 static int init_psk_kex_modes(SSL *s, unsigned int context)
1208 s->ext.psk_kex_mode = TLSEXT_KEX_MODE_FLAG_NONE;
1212 int tls_psk_do_binder(SSL *s, const EVP_MD *md, const unsigned char *msgstart,
1213 size_t binderoffset, const unsigned char *binderin,
1214 unsigned char *binderout, SSL_SESSION *sess, int sign,
1217 EVP_PKEY *mackey = NULL;
1218 EVP_MD_CTX *mctx = NULL;
1219 unsigned char hash[EVP_MAX_MD_SIZE], binderkey[EVP_MAX_MD_SIZE];
1220 unsigned char finishedkey[EVP_MAX_MD_SIZE], tmpbinder[EVP_MAX_MD_SIZE];
1221 unsigned char tmppsk[EVP_MAX_MD_SIZE];
1222 unsigned char *early_secret, *psk;
1223 const char resumption_label[] = "res binder";
1224 const char external_label[] = "ext binder";
1225 const char nonce_label[] = "resumption";
1227 size_t bindersize, labelsize, hashsize = EVP_MD_size(md);
1229 int usepskfored = 0;
1232 && s->early_data_state == SSL_EARLY_DATA_CONNECTING
1233 && s->session->ext.max_early_data == 0
1234 && sess->ext.max_early_data > 0)
1238 label = external_label;
1239 labelsize = sizeof(external_label) - 1;
1241 label = resumption_label;
1242 labelsize = sizeof(resumption_label) - 1;
1245 if (sess->master_key_length != hashsize) {
1246 SSLerr(SSL_F_TLS_PSK_DO_BINDER, SSL_R_BAD_PSK);
1251 psk = sess->master_key;
1254 if (!tls13_hkdf_expand(s, md, sess->master_key,
1255 (const unsigned char *)nonce_label,
1256 sizeof(nonce_label) - 1, sess->ext.tick_nonce,
1257 sess->ext.tick_nonce_len, psk, hashsize)) {
1258 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1264 * Generate the early_secret. On the server side we've selected a PSK to
1265 * resume with (internal or external) so we always do this. On the client
1266 * side we do this for a non-external (i.e. resumption) PSK or external PSK
1267 * that will be used for early_data so that it is in place for sending early
1268 * data. For client side external PSK not being used for early_data we
1269 * generate it but store it away for later use.
1271 if (s->server || !external || usepskfored)
1272 early_secret = (unsigned char *)s->early_secret;
1274 early_secret = (unsigned char *)sess->early_secret;
1275 if (!tls13_generate_secret(s, md, NULL, psk, hashsize, early_secret)) {
1276 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1281 * Create the handshake hash for the binder key...the messages so far are
1284 mctx = EVP_MD_CTX_new();
1286 || EVP_DigestInit_ex(mctx, md, NULL) <= 0
1287 || EVP_DigestFinal_ex(mctx, hash, NULL) <= 0) {
1288 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1292 /* Generate the binder key */
1293 if (!tls13_hkdf_expand(s, md, early_secret, (unsigned char *)label,
1294 labelsize, hash, hashsize, binderkey, hashsize)) {
1295 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1299 /* Generate the finished key */
1300 if (!tls13_derive_finishedkey(s, md, binderkey, finishedkey, hashsize)) {
1301 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1305 if (EVP_DigestInit_ex(mctx, md, NULL) <= 0) {
1306 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1311 * Get a hash of the ClientHello up to the start of the binders. If we are
1312 * following a HelloRetryRequest then this includes the hash of the first
1313 * ClientHello and the HelloRetryRequest itself.
1315 if (s->hello_retry_request) {
1319 hdatalen = BIO_get_mem_data(s->s3->handshake_buffer, &hdata);
1320 if (hdatalen <= 0) {
1321 SSLerr(SSL_F_TLS_PSK_DO_BINDER, SSL_R_BAD_HANDSHAKE_LENGTH);
1326 * For servers the handshake buffer data will include the second
1327 * ClientHello - which we don't want - so we need to take that bit off.
1330 PACKET hashprefix, msg;
1332 /* Find how many bytes are left after the first two messages */
1333 if (!PACKET_buf_init(&hashprefix, hdata, hdatalen)
1334 || !PACKET_forward(&hashprefix, 1)
1335 || !PACKET_get_length_prefixed_3(&hashprefix, &msg)
1336 || !PACKET_forward(&hashprefix, 1)
1337 || !PACKET_get_length_prefixed_3(&hashprefix, &msg)) {
1338 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1341 hdatalen -= PACKET_remaining(&hashprefix);
1344 if (EVP_DigestUpdate(mctx, hdata, hdatalen) <= 0) {
1345 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1350 if (EVP_DigestUpdate(mctx, msgstart, binderoffset) <= 0
1351 || EVP_DigestFinal_ex(mctx, hash, NULL) <= 0) {
1352 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1356 mackey = EVP_PKEY_new_mac_key(EVP_PKEY_HMAC, NULL, finishedkey, hashsize);
1357 if (mackey == NULL) {
1358 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1363 binderout = tmpbinder;
1365 bindersize = hashsize;
1366 if (EVP_DigestSignInit(mctx, NULL, md, NULL, mackey) <= 0
1367 || EVP_DigestSignUpdate(mctx, hash, hashsize) <= 0
1368 || EVP_DigestSignFinal(mctx, binderout, &bindersize) <= 0
1369 || bindersize != hashsize) {
1370 SSLerr(SSL_F_TLS_PSK_DO_BINDER, ERR_R_INTERNAL_ERROR);
1377 /* HMAC keys can't do EVP_DigestVerify* - use CRYPTO_memcmp instead */
1378 ret = (CRYPTO_memcmp(binderin, binderout, hashsize) == 0);
1382 OPENSSL_cleanse(binderkey, sizeof(binderkey));
1383 OPENSSL_cleanse(finishedkey, sizeof(finishedkey));
1384 EVP_PKEY_free(mackey);
1385 EVP_MD_CTX_free(mctx);
1390 static int final_early_data(SSL *s, unsigned int context, int sent, int *al)
1396 if (context == SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
1398 && !s->ext.early_data_ok) {
1400 * If we get here then the server accepted our early_data but we
1401 * later realised that it shouldn't have done (e.g. inconsistent
1404 *al = SSL_AD_ILLEGAL_PARAMETER;
1411 if (s->max_early_data == 0
1413 || s->session->ext.tick_identity != 0
1414 || s->early_data_state != SSL_EARLY_DATA_ACCEPTING
1415 || !s->ext.early_data_ok
1416 || s->hello_retry_request) {
1417 s->ext.early_data = SSL_EARLY_DATA_REJECTED;
1419 s->ext.early_data = SSL_EARLY_DATA_ACCEPTED;
1421 if (!tls13_change_cipher_state(s,
1422 SSL3_CC_EARLY | SSL3_CHANGE_CIPHER_SERVER_READ)) {
1423 *al = SSL_AD_INTERNAL_ERROR;