2 * Copyright 2016 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 int tls_construct_certificate_authorities(SSL
*s
, WPACKET
*pkt
,
35 unsigned int context
, X509
*x
,
36 size_t chainidx
, int *al
);
37 static int tls_parse_certificate_authorities(SSL
*s
, PACKET
*pkt
,
38 unsigned int context
, X509
*x
,
39 size_t chainidx
, int *al
);
40 #ifndef OPENSSL_NO_SRP
41 static int init_srp(SSL
*s
, unsigned int context
);
43 static int init_etm(SSL
*s
, unsigned int context
);
44 static int init_ems(SSL
*s
, unsigned int context
);
45 static int final_ems(SSL
*s
, unsigned int context
, int sent
, int *al
);
46 static int init_psk_kex_modes(SSL
*s
, unsigned int context
);
48 static int final_key_share(SSL
*s
, unsigned int context
, int sent
, int *al
);
50 #ifndef OPENSSL_NO_SRTP
51 static int init_srtp(SSL
*s
, unsigned int context
);
53 static int final_sig_algs(SSL
*s
, unsigned int context
, int sent
, int *al
);
54 static int final_early_data(SSL
*s
, unsigned int context
, int sent
, int *al
);
56 /* Structure to define a built-in extension */
57 typedef struct extensions_definition_st
{
58 /* The defined type for the extension */
61 * The context that this extension applies to, e.g. what messages and
66 * Initialise extension before parsing. Always called for relevant contexts
67 * even if extension not present
69 int (*init
)(SSL
*s
, unsigned int context
);
70 /* Parse extension sent from client to server */
71 int (*parse_ctos
)(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
72 size_t chainidx
, int *al
);
73 /* Parse extension send from server to client */
74 int (*parse_stoc
)(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
75 size_t chainidx
, int *al
);
76 /* Construct extension sent from server to client */
77 int (*construct_stoc
)(SSL
*s
, WPACKET
*pkt
, unsigned int context
, X509
*x
,
78 size_t chainidx
, int *al
);
79 /* Construct extension sent from client to server */
80 int (*construct_ctos
)(SSL
*s
, WPACKET
*pkt
, unsigned int context
, X509
*x
,
81 size_t chainidx
, int *al
);
83 * Finalise extension after parsing. Always called where an extensions was
84 * initialised even if the extension was not present. |sent| is set to 1 if
85 * the extension was seen, or 0 otherwise.
87 int (*final
)(SSL
*s
, unsigned int context
, int sent
, int *al
);
88 } EXTENSION_DEFINITION
;
91 * Definitions of all built-in extensions. NOTE: Changes in the number or order
92 * of these extensions should be mirrored with equivalent changes to the
93 * indexes ( TLSEXT_IDX_* ) defined in ssl_locl.h.
94 * Each extension has an initialiser, a client and
95 * server side parser and a finaliser. The initialiser is called (if the
96 * extension is relevant to the given context) even if we did not see the
97 * extension in the message that we received. The parser functions are only
98 * called if we see the extension in the message. The finalisers are always
99 * called if the initialiser was called.
100 * There are also server and client side constructor functions which are always
101 * called during message construction if the extension is relevant for the
103 * The initialisation, parsing, finalisation and construction functions are
104 * always called in the order defined in this list. Some extensions may depend
105 * on others having been processed first, so the order of this list is
107 * The extension context is defined by a series of flags which specify which
108 * messages the extension is relevant to. These flags also specify whether the
109 * extension is relevant to a particular protocol or protocol version.
111 * TODO(TLS1.3): Make sure we have a test to check the consistency of these
113 #define INVALID_EXTENSION { 0x10000, 0, NULL, NULL, NULL, NULL, NULL, NULL }
114 static const EXTENSION_DEFINITION ext_defs
[] = {
116 TLSEXT_TYPE_renegotiate
,
117 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
118 | SSL_EXT_SSL3_ALLOWED
| SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
119 NULL
, tls_parse_ctos_renegotiate
, tls_parse_stoc_renegotiate
,
120 tls_construct_stoc_renegotiate
, tls_construct_ctos_renegotiate
,
124 TLSEXT_TYPE_server_name
,
125 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
126 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
,
128 tls_parse_ctos_server_name
, tls_parse_stoc_server_name
,
129 tls_construct_stoc_server_name
, tls_construct_ctos_server_name
,
132 #ifndef OPENSSL_NO_SRP
135 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
136 init_srp
, tls_parse_ctos_srp
, NULL
, NULL
, tls_construct_ctos_srp
, NULL
141 #ifndef OPENSSL_NO_EC
143 TLSEXT_TYPE_ec_point_formats
,
144 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
145 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
146 NULL
, tls_parse_ctos_ec_pt_formats
, tls_parse_stoc_ec_pt_formats
,
147 tls_construct_stoc_ec_pt_formats
, tls_construct_ctos_ec_pt_formats
,
151 TLSEXT_TYPE_supported_groups
,
152 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
,
153 NULL
, tls_parse_ctos_supported_groups
, NULL
,
154 NULL
/* TODO(TLS1.3): Need to add this */,
155 tls_construct_ctos_supported_groups
, NULL
162 TLSEXT_TYPE_session_ticket
,
163 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
164 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
165 init_session_ticket
, tls_parse_ctos_session_ticket
,
166 tls_parse_stoc_session_ticket
, tls_construct_stoc_session_ticket
,
167 tls_construct_ctos_session_ticket
, NULL
170 TLSEXT_TYPE_signature_algorithms
,
171 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
,
172 init_sig_algs
, tls_parse_ctos_sig_algs
,
173 tls_parse_ctos_sig_algs
, tls_construct_ctos_sig_algs
,
174 tls_construct_ctos_sig_algs
, final_sig_algs
176 #ifndef OPENSSL_NO_OCSP
178 TLSEXT_TYPE_status_request
,
179 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
180 | SSL_EXT_TLS1_3_CERTIFICATE
,
181 init_status_request
, tls_parse_ctos_status_request
,
182 tls_parse_stoc_status_request
, tls_construct_stoc_status_request
,
183 tls_construct_ctos_status_request
, NULL
188 #ifndef OPENSSL_NO_NEXTPROTONEG
190 TLSEXT_TYPE_next_proto_neg
,
191 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
192 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
193 init_npn
, tls_parse_ctos_npn
, tls_parse_stoc_npn
,
194 tls_construct_stoc_next_proto_neg
, tls_construct_ctos_npn
, NULL
201 * Must appear in this list after server_name so that finalisation
202 * happens after server_name callbacks
204 TLSEXT_TYPE_application_layer_protocol_negotiation
,
205 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
206 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
,
207 init_alpn
, tls_parse_ctos_alpn
, tls_parse_stoc_alpn
,
208 tls_construct_stoc_alpn
, tls_construct_ctos_alpn
, final_alpn
210 #ifndef OPENSSL_NO_SRTP
212 TLSEXT_TYPE_use_srtp
,
213 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
214 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
| SSL_EXT_DTLS_ONLY
,
215 init_srtp
, tls_parse_ctos_use_srtp
, tls_parse_stoc_use_srtp
,
216 tls_construct_stoc_use_srtp
, tls_construct_ctos_use_srtp
, NULL
222 TLSEXT_TYPE_encrypt_then_mac
,
223 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
224 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
225 init_etm
, tls_parse_ctos_etm
, tls_parse_stoc_etm
,
226 tls_construct_stoc_etm
, tls_construct_ctos_etm
, NULL
228 #ifndef OPENSSL_NO_CT
230 TLSEXT_TYPE_signed_certificate_timestamp
,
231 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
232 | SSL_EXT_TLS1_3_CERTIFICATE
,
235 * No server side support for this, but can be provided by a custom
236 * extension. This is an exception to the rule that custom extensions
237 * cannot override built in ones.
239 NULL
, tls_parse_stoc_sct
, NULL
, tls_construct_ctos_sct
, NULL
245 TLSEXT_TYPE_extended_master_secret
,
246 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
247 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
248 init_ems
, tls_parse_ctos_ems
, tls_parse_stoc_ems
,
249 tls_construct_stoc_ems
, tls_construct_ctos_ems
, final_ems
252 TLSEXT_TYPE_supported_versions
,
253 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS_IMPLEMENTATION_ONLY
254 | SSL_EXT_TLS1_3_ONLY
,
256 /* Processed inline as part of version selection */
257 NULL
, NULL
, NULL
, tls_construct_ctos_supported_versions
, NULL
260 TLSEXT_TYPE_psk_kex_modes
,
261 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS_IMPLEMENTATION_ONLY
262 | SSL_EXT_TLS1_3_ONLY
,
263 init_psk_kex_modes
, tls_parse_ctos_psk_kex_modes
, NULL
, NULL
,
264 tls_construct_ctos_psk_kex_modes
, NULL
266 #ifndef OPENSSL_NO_EC
269 * Must be in this list after supported_groups. We need that to have
270 * been parsed before we do this one.
272 TLSEXT_TYPE_key_share
,
273 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_SERVER_HELLO
274 | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
| SSL_EXT_TLS_IMPLEMENTATION_ONLY
275 | SSL_EXT_TLS1_3_ONLY
,
276 NULL
, tls_parse_ctos_key_share
, tls_parse_stoc_key_share
,
277 tls_construct_stoc_key_share
, tls_construct_ctos_key_share
,
283 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
284 | SSL_EXT_TLS_IMPLEMENTATION_ONLY
| SSL_EXT_TLS1_3_ONLY
,
285 NULL
, NULL
, tls_parse_stoc_cookie
, NULL
, tls_construct_ctos_cookie
,
290 * Special unsolicited ServerHello extension only used when
291 * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set
293 TLSEXT_TYPE_cryptopro_bug
,
294 SSL_EXT_TLS1_2_SERVER_HELLO
| SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
295 NULL
, NULL
, NULL
, tls_construct_stoc_cryptopro_bug
, NULL
, NULL
298 TLSEXT_TYPE_early_data
,
299 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
300 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET
,
301 NULL
, tls_parse_ctos_early_data
, tls_parse_stoc_early_data
,
302 tls_construct_stoc_early_data
, tls_construct_ctos_early_data
,
306 TLSEXT_TYPE_certificate_authorities
,
307 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
308 | SSL_EXT_TLS1_3_ONLY
,
309 init_certificate_authorities
,
310 tls_parse_certificate_authorities
, tls_parse_certificate_authorities
,
311 tls_construct_certificate_authorities
,
312 tls_construct_certificate_authorities
, NULL
,
315 /* Must be immediately before pre_shared_key */
317 SSL_EXT_CLIENT_HELLO
,
319 /* We send this, but don't read it */
320 NULL
, NULL
, NULL
, tls_construct_ctos_padding
, NULL
323 /* Required by the TLSv1.3 spec to always be the last extension */
325 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_SERVER_HELLO
326 | SSL_EXT_TLS_IMPLEMENTATION_ONLY
| SSL_EXT_TLS1_3_ONLY
,
327 NULL
, tls_parse_ctos_psk
, tls_parse_stoc_psk
, tls_construct_stoc_psk
,
328 tls_construct_ctos_psk
, NULL
333 * Verify whether we are allowed to use the extension |type| in the current
334 * |context|. Returns 1 to indicate the extension is allowed or unknown or 0 to
335 * indicate the extension is not allowed. If returning 1 then |*found| is set to
336 * the definition for the extension we found.
338 static int verify_extension(SSL
*s
, unsigned int context
, unsigned int type
,
339 custom_ext_methods
*meths
, RAW_EXTENSION
*rawexlist
,
340 RAW_EXTENSION
**found
)
343 size_t builtin_num
= OSSL_NELEM(ext_defs
);
344 const EXTENSION_DEFINITION
*thisext
;
346 for (i
= 0, thisext
= ext_defs
; i
< builtin_num
; i
++, thisext
++) {
347 if (type
== thisext
->type
) {
348 /* Check we're allowed to use this extension in this context */
349 if ((context
& thisext
->context
) == 0)
352 if (SSL_IS_DTLS(s
)) {
353 if ((thisext
->context
& SSL_EXT_TLS_ONLY
) != 0)
355 } else if ((thisext
->context
& SSL_EXT_DTLS_ONLY
) != 0) {
359 *found
= &rawexlist
[i
];
364 if ((context
& (SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
)) == 0) {
366 * Custom extensions only apply to <=TLS1.2. This extension is unknown
367 * in this context - we allow it
373 /* Check the custom extensions */
375 for (i
= builtin_num
; i
< builtin_num
+ meths
->meths_count
; i
++) {
376 if (meths
->meths
[i
- builtin_num
].ext_type
== type
) {
377 *found
= &rawexlist
[i
];
383 /* Unknown extension. We allow it */
389 * Check whether the context defined for an extension |extctx| means whether
390 * the extension is relevant for the current context |thisctx| or not. Returns
391 * 1 if the extension is relevant for this context, and 0 otherwise
393 static int extension_is_relevant(SSL
*s
, unsigned int extctx
,
394 unsigned int thisctx
)
397 && (extctx
& SSL_EXT_TLS_IMPLEMENTATION_ONLY
) != 0)
398 || (s
->version
== SSL3_VERSION
399 && (extctx
& SSL_EXT_SSL3_ALLOWED
) == 0)
401 && (extctx
& SSL_EXT_TLS1_2_AND_BELOW_ONLY
) != 0)
402 || (!SSL_IS_TLS13(s
) && (extctx
& SSL_EXT_TLS1_3_ONLY
) != 0))
409 * Gather a list of all the extensions from the data in |packet]. |context|
410 * tells us which message this extension is for. The raw extension data is
411 * stored in |*res| on success. In the event of an error the alert type to use
412 * is stored in |*al|. We don't actually process the content of the extensions
413 * yet, except to check their types. This function also runs the initialiser
414 * functions for all known extensions (whether we have collected them or not).
415 * If successful the caller is responsible for freeing the contents of |*res|.
417 * Per http://tools.ietf.org/html/rfc5246#section-7.4.1.4, there may not be
418 * more than one extension of the same type in a ClientHello or ServerHello.
419 * This function returns 1 if all extensions are unique and we have parsed their
420 * types, and 0 if the extensions contain duplicates, could not be successfully
421 * found, or an internal error occurred. We only check duplicates for
422 * extensions that we know about. We ignore others.
424 int tls_collect_extensions(SSL
*s
, PACKET
*packet
, unsigned int context
,
425 RAW_EXTENSION
**res
, int *al
, size_t *len
)
427 PACKET extensions
= *packet
;
430 custom_ext_methods
*exts
= NULL
;
431 RAW_EXTENSION
*raw_extensions
= NULL
;
432 const EXTENSION_DEFINITION
*thisexd
;
437 * Initialise server side custom extensions. Client side is done during
438 * construction of extensions for the ClientHello.
440 if ((context
& SSL_EXT_CLIENT_HELLO
) != 0) {
441 exts
= &s
->cert
->srv_ext
;
442 custom_ext_init(&s
->cert
->srv_ext
);
443 } else if ((context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0) {
444 exts
= &s
->cert
->cli_ext
;
447 num_exts
= OSSL_NELEM(ext_defs
) + (exts
!= NULL
? exts
->meths_count
: 0);
448 raw_extensions
= OPENSSL_zalloc(num_exts
* sizeof(*raw_extensions
));
449 if (raw_extensions
== NULL
) {
450 *al
= SSL_AD_INTERNAL_ERROR
;
451 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS
, ERR_R_MALLOC_FAILURE
);
455 while (PACKET_remaining(&extensions
) > 0) {
458 RAW_EXTENSION
*thisex
;
460 if (!PACKET_get_net_2(&extensions
, &type
) ||
461 !PACKET_get_length_prefixed_2(&extensions
, &extension
)) {
462 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS
, SSL_R_BAD_EXTENSION
);
463 *al
= SSL_AD_DECODE_ERROR
;
467 * Verify this extension is allowed. We only check duplicates for
468 * extensions that we recognise. We also have a special case for the
469 * PSK extension, which must be the last one in the ClientHello.
471 if (!verify_extension(s
, context
, type
, exts
, raw_extensions
, &thisex
)
472 || (thisex
!= NULL
&& thisex
->present
== 1)
473 || (type
== TLSEXT_TYPE_psk
474 && (context
& SSL_EXT_CLIENT_HELLO
) != 0
475 && PACKET_remaining(&extensions
) != 0)) {
476 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS
, SSL_R_BAD_EXTENSION
);
477 *al
= SSL_AD_ILLEGAL_PARAMETER
;
480 if (thisex
!= NULL
) {
481 thisex
->data
= extension
;
488 * Initialise all known extensions relevant to this context, whether we have
491 for (thisexd
= ext_defs
, i
= 0; i
< OSSL_NELEM(ext_defs
); i
++, thisexd
++) {
492 if(thisexd
->init
!= NULL
&& (thisexd
->context
& context
) != 0
493 && extension_is_relevant(s
, thisexd
->context
, context
)
494 && !thisexd
->init(s
, context
)) {
495 *al
= SSL_AD_INTERNAL_ERROR
;
500 *res
= raw_extensions
;
506 OPENSSL_free(raw_extensions
);
511 * Runs the parser for a given extension with index |idx|. |exts| contains the
512 * list of all parsed extensions previously collected by
513 * tls_collect_extensions(). The parser is only run if it is applicable for the
514 * given |context| and the parser has not already been run. If this is for a
515 * Certificate message, then we also provide the parser with the relevant
516 * Certificate |x| and its position in the |chainidx| with 0 being the first
517 * Certificate. Returns 1 on success or 0 on failure. In the event of a failure
518 * |*al| is populated with a suitable alert code. If an extension is not present
519 * this counted as success.
521 int tls_parse_extension(SSL
*s
, TLSEXT_INDEX idx
, int context
,
522 RAW_EXTENSION
*exts
, X509
*x
, size_t chainidx
, int *al
)
524 RAW_EXTENSION
*currext
= &exts
[idx
];
525 int (*parser
)(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
526 size_t chainidx
, int *al
) = NULL
;
528 /* Skip if the extension is not present */
529 if (!currext
->present
)
533 s
->ext
.debug_cb(s
, !s
->server
, currext
->type
,
534 PACKET_data(&currext
->data
),
535 PACKET_remaining(&currext
->data
),
538 /* Skip if we've already parsed this extension */
544 if (idx
< OSSL_NELEM(ext_defs
)) {
545 /* We are handling a built-in extension */
546 const EXTENSION_DEFINITION
*extdef
= &ext_defs
[idx
];
548 /* Check if extension is defined for our protocol. If not, skip */
549 if (!extension_is_relevant(s
, extdef
->context
, context
))
552 parser
= s
->server
? extdef
->parse_ctos
: extdef
->parse_stoc
;
555 return parser(s
, &currext
->data
, context
, x
, chainidx
, al
);
558 * If the parser is NULL we fall through to the custom extension
564 * This is a custom extension. We only allow this if it is a non
565 * resumed session on the server side.
567 * TODO(TLS1.3): We only allow old style <=TLS1.2 custom extensions.
568 * We're going to need a new mechanism for TLS1.3 to specify which
569 * messages to add the custom extensions to.
571 if ((!s
->hit
|| !s
->server
)
573 & (SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
)) != 0
574 && custom_ext_parse(s
, s
->server
, currext
->type
,
575 PACKET_data(&currext
->data
),
576 PACKET_remaining(&currext
->data
),
584 * Parse all remaining extensions that have not yet been parsed. Also calls the
585 * finalisation for all extensions at the end, whether we collected them or not.
586 * Returns 1 for success or 0 for failure. If we are working on a Certificate
587 * message then we also pass the Certificate |x| and its position in the
588 * |chainidx|, with 0 being the first certificate. On failure, |*al| is
589 * populated with a suitable alert code.
591 int tls_parse_all_extensions(SSL
*s
, int context
, RAW_EXTENSION
*exts
, X509
*x
,
592 size_t chainidx
, int *al
)
594 size_t i
, numexts
= OSSL_NELEM(ext_defs
);
595 const EXTENSION_DEFINITION
*thisexd
;
597 /* Calculate the number of extensions in the extensions list */
598 if ((context
& SSL_EXT_CLIENT_HELLO
) != 0) {
599 numexts
+= s
->cert
->srv_ext
.meths_count
;
600 } else if ((context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0) {
601 numexts
+= s
->cert
->cli_ext
.meths_count
;
604 /* Parse each extension in turn */
605 for (i
= 0; i
< numexts
; i
++) {
606 if (!tls_parse_extension(s
, i
, context
, exts
, x
, chainidx
, al
))
611 * Finalise all known extensions relevant to this context, whether we have
614 for (i
= 0, thisexd
= ext_defs
; i
< OSSL_NELEM(ext_defs
); i
++, thisexd
++) {
615 if(thisexd
->final
!= NULL
616 && (thisexd
->context
& context
) != 0
617 && !thisexd
->final(s
, context
, exts
[i
].present
, al
))
625 * Construct all the extensions relevant to the current |context| and write
626 * them to |pkt|. If this is an extension for a Certificate in a Certificate
627 * message, then |x| will be set to the Certificate we are handling, and
628 * |chainidx| will indicate the position in the chainidx we are processing (with
629 * 0 being the first in the chain). Returns 1 on success or 0 on failure. If a
630 * failure occurs then |al| is populated with a suitable alert code. On a
631 * failure construction stops at the first extension to fail to construct.
633 int tls_construct_extensions(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
634 X509
*x
, size_t chainidx
, int *al
)
637 int addcustom
= 0, min_version
, max_version
= 0, reason
, tmpal
;
638 const EXTENSION_DEFINITION
*thisexd
;
641 * Normally if something goes wrong during construction it's an internal
642 * error. We can always override this later.
644 tmpal
= SSL_AD_INTERNAL_ERROR
;
646 if (!WPACKET_start_sub_packet_u16(pkt
)
648 * If extensions are of zero length then we don't even add the
649 * extensions length bytes to a ClientHello/ServerHello in SSLv3
652 (SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
)) != 0
653 && s
->version
== SSL3_VERSION
654 && !WPACKET_set_flags(pkt
,
655 WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH
))) {
656 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS
, ERR_R_INTERNAL_ERROR
);
660 if ((context
& SSL_EXT_CLIENT_HELLO
) != 0) {
661 reason
= ssl_get_client_min_max_version(s
, &min_version
, &max_version
);
663 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS
, reason
);
668 /* Add custom extensions first */
669 if ((context
& SSL_EXT_CLIENT_HELLO
) != 0) {
670 custom_ext_init(&s
->cert
->cli_ext
);
672 } else if ((context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0) {
674 * We already initialised the custom extensions during ClientHello
677 * TODO(TLS1.3): We're going to need a new custom extension mechanism
678 * for TLS1.3, so that custom extensions can specify which of the
679 * multiple message they wish to add themselves to.
684 if (addcustom
&& !custom_ext_add(s
, s
->server
, pkt
, &tmpal
)) {
685 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS
, ERR_R_INTERNAL_ERROR
);
689 for (i
= 0, thisexd
= ext_defs
; i
< OSSL_NELEM(ext_defs
); i
++, thisexd
++) {
690 int (*construct
)(SSL
*s
, WPACKET
*pkt
, unsigned int context
, X509
*x
,
691 size_t chainidx
, int *al
);
693 /* Skip if not relevant for our context */
694 if ((thisexd
->context
& context
) == 0)
697 construct
= s
->server
? thisexd
->construct_stoc
698 : thisexd
->construct_ctos
;
700 /* Check if this extension is defined for our protocol. If not, skip */
702 && (thisexd
->context
& SSL_EXT_TLS_IMPLEMENTATION_ONLY
)
704 || (s
->version
== SSL3_VERSION
705 && (thisexd
->context
& SSL_EXT_SSL3_ALLOWED
) == 0)
707 && (thisexd
->context
& SSL_EXT_TLS1_2_AND_BELOW_ONLY
)
710 && (thisexd
->context
& SSL_EXT_TLS1_3_ONLY
) != 0
711 && (context
& SSL_EXT_CLIENT_HELLO
) == 0)
712 || ((thisexd
->context
& SSL_EXT_TLS1_3_ONLY
) != 0
713 && (context
& SSL_EXT_CLIENT_HELLO
) != 0
714 && (SSL_IS_DTLS(s
) || max_version
< TLS1_3_VERSION
))
715 || construct
== NULL
)
718 if (!construct(s
, pkt
, context
, x
, chainidx
, &tmpal
))
722 if (!WPACKET_close(pkt
)) {
723 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS
, ERR_R_INTERNAL_ERROR
);
735 * Built in extension finalisation and initialisation functions. All initialise
736 * or finalise the associated extension type for the given |context|. For
737 * finalisers |sent| is set to 1 if we saw the extension during parsing, and 0
738 * otherwise. These functions return 1 on success or 0 on failure. In the event
739 * of a failure then |*al| is populated with a suitable error code.
742 static int final_renegotiate(SSL
*s
, unsigned int context
, int sent
,
747 * Check if we can connect to a server that doesn't support safe
750 if (!(s
->options
& SSL_OP_LEGACY_SERVER_CONNECT
)
751 && !(s
->options
& SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
)
753 *al
= SSL_AD_HANDSHAKE_FAILURE
;
754 SSLerr(SSL_F_FINAL_RENEGOTIATE
,
755 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED
);
762 /* Need RI if renegotiating */
764 && !(s
->options
& SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
)
766 *al
= SSL_AD_HANDSHAKE_FAILURE
;
767 SSLerr(SSL_F_FINAL_RENEGOTIATE
,
768 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED
);
776 static int init_server_name(SSL
*s
, unsigned int context
)
779 s
->servername_done
= 0;
784 static int final_server_name(SSL
*s
, unsigned int context
, int sent
,
787 int ret
= SSL_TLSEXT_ERR_NOACK
;
788 int altmp
= SSL_AD_UNRECOGNIZED_NAME
;
790 if (s
->ctx
!= NULL
&& s
->ctx
->ext
.servername_cb
!= 0)
791 ret
= s
->ctx
->ext
.servername_cb(s
, &altmp
,
792 s
->ctx
->ext
.servername_arg
);
793 else if (s
->session_ctx
!= NULL
794 && s
->session_ctx
->ext
.servername_cb
!= 0)
795 ret
= s
->session_ctx
->ext
.servername_cb(s
, &altmp
,
796 s
->session_ctx
->ext
.servername_arg
);
799 case SSL_TLSEXT_ERR_ALERT_FATAL
:
803 case SSL_TLSEXT_ERR_ALERT_WARNING
:
807 case SSL_TLSEXT_ERR_NOACK
:
808 s
->servername_done
= 0;
816 #ifndef OPENSSL_NO_EC
817 static int final_ec_pt_formats(SSL
*s
, unsigned int context
, int sent
,
820 unsigned long alg_k
, alg_a
;
825 alg_k
= s
->s3
->tmp
.new_cipher
->algorithm_mkey
;
826 alg_a
= s
->s3
->tmp
.new_cipher
->algorithm_auth
;
829 * If we are client and using an elliptic curve cryptography cipher
830 * suite, then if server returns an EC point formats lists extension it
831 * must contain uncompressed.
833 if (s
->ext
.ecpointformats
!= NULL
834 && s
->ext
.ecpointformats_len
> 0
835 && s
->session
->ext
.ecpointformats
!= NULL
836 && s
->session
->ext
.ecpointformats_len
> 0
837 && ((alg_k
& SSL_kECDHE
) || (alg_a
& SSL_aECDSA
))) {
838 /* we are using an ECC cipher */
840 unsigned char *list
= s
->session
->ext
.ecpointformats
;
842 for (i
= 0; i
< s
->session
->ext
.ecpointformats_len
; i
++) {
843 if (*list
++ == TLSEXT_ECPOINTFORMAT_uncompressed
)
846 if (i
== s
->session
->ext
.ecpointformats_len
) {
847 SSLerr(SSL_F_FINAL_EC_PT_FORMATS
,
848 SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST
);
857 static int init_session_ticket(SSL
*s
, unsigned int context
)
860 s
->ext
.ticket_expected
= 0;
865 #ifndef OPENSSL_NO_OCSP
866 static int init_status_request(SSL
*s
, unsigned int context
)
869 s
->ext
.status_type
= TLSEXT_STATUSTYPE_nothing
;
872 * Ensure we get sensible values passed to tlsext_status_cb in the event
873 * that we don't receive a status message
875 OPENSSL_free(s
->ext
.ocsp
.resp
);
876 s
->ext
.ocsp
.resp
= NULL
;
877 s
->ext
.ocsp
.resp_len
= 0;
884 #ifndef OPENSSL_NO_NEXTPROTONEG
885 static int init_npn(SSL
*s
, unsigned int context
)
893 static int init_alpn(SSL
*s
, unsigned int context
)
895 OPENSSL_free(s
->s3
->alpn_selected
);
896 s
->s3
->alpn_selected
= NULL
;
897 s
->s3
->alpn_selected_len
= 0;
899 OPENSSL_free(s
->s3
->alpn_proposed
);
900 s
->s3
->alpn_proposed
= NULL
;
901 s
->s3
->alpn_proposed_len
= 0;
906 static int final_alpn(SSL
*s
, unsigned int context
, int sent
, int *al
)
908 const unsigned char *selected
= NULL
;
909 unsigned char selected_len
= 0;
914 if (s
->ctx
->ext
.alpn_select_cb
!= NULL
&& s
->s3
->alpn_proposed
!= NULL
) {
915 int r
= s
->ctx
->ext
.alpn_select_cb(s
, &selected
, &selected_len
,
916 s
->s3
->alpn_proposed
,
917 (unsigned int)s
->s3
->alpn_proposed_len
,
918 s
->ctx
->ext
.alpn_select_cb_arg
);
920 if (r
== SSL_TLSEXT_ERR_OK
) {
921 OPENSSL_free(s
->s3
->alpn_selected
);
922 s
->s3
->alpn_selected
= OPENSSL_memdup(selected
, selected_len
);
923 if (s
->s3
->alpn_selected
== NULL
) {
924 *al
= SSL_AD_INTERNAL_ERROR
;
927 s
->s3
->alpn_selected_len
= selected_len
;
928 #ifndef OPENSSL_NO_NEXTPROTONEG
929 /* ALPN takes precedence over NPN. */
933 *al
= SSL_AD_NO_APPLICATION_PROTOCOL
;
941 static int init_sig_algs(SSL
*s
, unsigned int context
)
943 /* Clear any signature algorithms extension received */
944 OPENSSL_free(s
->s3
->tmp
.peer_sigalgs
);
945 s
->s3
->tmp
.peer_sigalgs
= NULL
;
950 #ifndef OPENSSL_NO_SRP
951 static int init_srp(SSL
*s
, unsigned int context
)
953 OPENSSL_free(s
->srp_ctx
.login
);
954 s
->srp_ctx
.login
= NULL
;
960 static int init_etm(SSL
*s
, unsigned int context
)
967 static int init_ems(SSL
*s
, unsigned int context
)
970 s
->s3
->flags
&= ~TLS1_FLAGS_RECEIVED_EXTMS
;
975 static int final_ems(SSL
*s
, unsigned int context
, int sent
, int *al
)
977 if (!s
->server
&& s
->hit
) {
979 * Check extended master secret extension is consistent with
982 if (!(s
->s3
->flags
& TLS1_FLAGS_RECEIVED_EXTMS
) !=
983 !(s
->session
->flags
& SSL_SESS_FLAG_EXTMS
)) {
984 *al
= SSL_AD_HANDSHAKE_FAILURE
;
985 SSLerr(SSL_F_FINAL_EMS
, SSL_R_INCONSISTENT_EXTMS
);
993 static int init_certificate_authorities(SSL
*s
, unsigned int context
)
995 sk_X509_NAME_pop_free(s
->s3
->tmp
.peer_ca_names
, X509_NAME_free
);
996 s
->s3
->tmp
.peer_ca_names
= NULL
;
1000 static int tls_construct_certificate_authorities(SSL
*s
, WPACKET
*pkt
,
1001 unsigned int context
, X509
*x
,
1002 size_t chainidx
, int *al
)
1004 const STACK_OF(X509_NAME
) *ca_sk
= SSL_get0_CA_list(s
);
1006 if (ca_sk
== NULL
|| sk_X509_NAME_num(ca_sk
) == 0)
1009 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_certificate_authorities
)
1010 || !WPACKET_start_sub_packet_u16(pkt
)
1011 || !construct_ca_names(s
, pkt
)
1012 || !WPACKET_close(pkt
)) {
1013 SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_AUTHORITIES
,
1014 ERR_R_INTERNAL_ERROR
);
1021 static int tls_parse_certificate_authorities(SSL
*s
, PACKET
*pkt
,
1022 unsigned int context
, X509
*x
,
1023 size_t chainidx
, int *al
)
1025 if (!parse_ca_names(s
, pkt
, al
))
1027 if (PACKET_remaining(pkt
) != 0) {
1028 *al
= SSL_AD_DECODE_ERROR
;
1034 #ifndef OPENSSL_NO_SRTP
1035 static int init_srtp(SSL
*s
, unsigned int context
)
1038 s
->srtp_profile
= NULL
;
1044 static int final_sig_algs(SSL
*s
, unsigned int context
, int sent
, int *al
)
1046 if (!sent
&& SSL_IS_TLS13(s
)) {
1047 *al
= TLS13_AD_MISSING_EXTENSION
;
1048 SSLerr(SSL_F_FINAL_SIG_ALGS
, SSL_R_MISSING_SIGALGS_EXTENSION
);
1055 #ifndef OPENSSL_NO_EC
1056 static int final_key_share(SSL
*s
, unsigned int context
, int sent
, int *al
)
1058 if (!SSL_IS_TLS13(s
))
1065 * we have no key_share
1067 * (we are not resuming
1068 * OR the kex_mode doesn't allow non key_share resumes)
1075 || (s
->ext
.psk_kex_mode
& TLSEXT_KEX_MODE_FLAG_KE
) == 0)) {
1076 /* Nothing left we can do - just fail */
1077 *al
= SSL_AD_HANDSHAKE_FAILURE
;
1078 SSLerr(SSL_F_FINAL_KEY_SHARE
, SSL_R_NO_SUITABLE_KEY_SHARE
);
1085 * we have no key_share
1088 * we didn't already send a HelloRetryRequest
1090 * the client sent a key_share extension
1092 * (we are not resuming
1093 * OR the kex_mode allows key_share resumes)
1095 * a shared group exists
1097 * send a HelloRetryRequest
1099 * we are not resuming
1101 * the kex_mode doesn't allow non key_share resumes
1105 if (s
->server
&& s
->s3
->peer_tmp
== NULL
) {
1106 /* No suitable share */
1107 if (s
->hello_retry_request
== 0 && sent
1109 || (s
->ext
.psk_kex_mode
& TLSEXT_KEX_MODE_FLAG_KE_DHE
)
1111 const unsigned char *pcurves
, *pcurvestmp
, *clntcurves
;
1112 size_t num_curves
, clnt_num_curves
, i
;
1113 unsigned int group_id
= 0;
1115 /* Check if a shared group exists */
1117 /* Get the clients list of supported groups. */
1118 if (!tls1_get_curvelist(s
, 1, &clntcurves
, &clnt_num_curves
)) {
1119 *al
= SSL_AD_INTERNAL_ERROR
;
1120 SSLerr(SSL_F_FINAL_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1124 /* Get our list of available groups */
1125 if (!tls1_get_curvelist(s
, 0, &pcurves
, &num_curves
)) {
1126 *al
= SSL_AD_INTERNAL_ERROR
;
1127 SSLerr(SSL_F_FINAL_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1131 /* Find the first group we allow that is also in client's list */
1132 for (i
= 0, pcurvestmp
= pcurves
; i
< num_curves
;
1133 i
++, pcurvestmp
+= 2) {
1134 group_id
= bytestogroup(pcurvestmp
);
1136 if (check_in_list(s
, group_id
, clntcurves
, clnt_num_curves
, 1))
1140 if (i
< num_curves
) {
1141 /* A shared group exists so send a HelloRetryRequest */
1142 s
->s3
->group_id
= group_id
;
1143 s
->hello_retry_request
= 1;
1148 || (s
->ext
.psk_kex_mode
& TLSEXT_KEX_MODE_FLAG_KE
) == 0) {
1149 /* Nothing left we can do - just fail */
1150 *al
= SSL_AD_HANDSHAKE_FAILURE
;
1151 SSLerr(SSL_F_FINAL_KEY_SHARE
, SSL_R_NO_SUITABLE_KEY_SHARE
);
1156 /* We have a key_share so don't send any more HelloRetryRequest messages */
1158 s
->hello_retry_request
= 0;
1161 * For a client side resumption with no key_share we need to generate
1162 * the handshake secret (otherwise this is done during key_share
1165 if (!sent
&& !s
->server
&& !tls13_generate_handshake_secret(s
, NULL
, 0)) {
1166 *al
= SSL_AD_INTERNAL_ERROR
;
1167 SSLerr(SSL_F_FINAL_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1175 static int init_psk_kex_modes(SSL
*s
, unsigned int context
)
1177 s
->ext
.psk_kex_mode
= TLSEXT_KEX_MODE_FLAG_NONE
;
1181 int tls_psk_do_binder(SSL
*s
, const EVP_MD
*md
, const unsigned char *msgstart
,
1182 size_t binderoffset
, const unsigned char *binderin
,
1183 unsigned char *binderout
,
1184 SSL_SESSION
*sess
, int sign
)
1186 EVP_PKEY
*mackey
= NULL
;
1187 EVP_MD_CTX
*mctx
= NULL
;
1188 unsigned char hash
[EVP_MAX_MD_SIZE
], binderkey
[EVP_MAX_MD_SIZE
];
1189 unsigned char finishedkey
[EVP_MAX_MD_SIZE
], tmpbinder
[EVP_MAX_MD_SIZE
];
1190 const char resumption_label
[] = "resumption psk binder key";
1191 size_t bindersize
, hashsize
= EVP_MD_size(md
);
1194 /* Generate the early_secret */
1195 if (!tls13_generate_secret(s
, md
, NULL
, sess
->master_key
,
1196 sess
->master_key_length
,
1197 (unsigned char *)&s
->early_secret
)) {
1198 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1203 * Create the handshake hash for the binder key...the messages so far are
1206 mctx
= EVP_MD_CTX_new();
1208 || EVP_DigestInit_ex(mctx
, md
, NULL
) <= 0
1209 || EVP_DigestFinal_ex(mctx
, hash
, NULL
) <= 0) {
1210 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1214 /* Generate the binder key */
1215 if (!tls13_hkdf_expand(s
, md
, s
->early_secret
,
1216 (unsigned char *)resumption_label
,
1217 sizeof(resumption_label
) - 1, hash
, binderkey
,
1219 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1223 /* Generate the finished key */
1224 if (!tls13_derive_finishedkey(s
, md
, binderkey
, finishedkey
, hashsize
)) {
1225 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1229 if (EVP_DigestInit_ex(mctx
, md
, NULL
) <= 0) {
1230 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1235 * Get a hash of the ClientHello up to the start of the binders. If we are
1236 * following a HelloRetryRequest then this includes the hash of the first
1237 * ClientHello and the HelloRetryRequest itself.
1239 if (s
->hello_retry_request
) {
1243 hdatalen
= BIO_get_mem_data(s
->s3
->handshake_buffer
, &hdata
);
1244 if (hdatalen
<= 0) {
1245 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, SSL_R_BAD_HANDSHAKE_LENGTH
);
1250 * For servers the handshake buffer data will include the second
1251 * ClientHello - which we don't want - so we need to take that bit off.
1254 PACKET hashprefix
, msg
;
1256 /* Find how many bytes are left after the first two messages */
1257 if (!PACKET_buf_init(&hashprefix
, hdata
, hdatalen
)
1258 || !PACKET_forward(&hashprefix
, 1)
1259 || !PACKET_get_length_prefixed_3(&hashprefix
, &msg
)
1260 || !PACKET_forward(&hashprefix
, 1)
1261 || !PACKET_get_length_prefixed_3(&hashprefix
, &msg
)) {
1262 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1265 hdatalen
-= PACKET_remaining(&hashprefix
);
1268 if (EVP_DigestUpdate(mctx
, hdata
, hdatalen
) <= 0) {
1269 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1274 if (EVP_DigestUpdate(mctx
, msgstart
, binderoffset
) <= 0
1275 || EVP_DigestFinal_ex(mctx
, hash
, NULL
) <= 0) {
1276 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1280 mackey
= EVP_PKEY_new_mac_key(EVP_PKEY_HMAC
, NULL
, finishedkey
, hashsize
);
1281 if (mackey
== NULL
) {
1282 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1287 binderout
= tmpbinder
;
1289 bindersize
= hashsize
;
1290 if (EVP_DigestSignInit(mctx
, NULL
, md
, NULL
, mackey
) <= 0
1291 || EVP_DigestSignUpdate(mctx
, hash
, hashsize
) <= 0
1292 || EVP_DigestSignFinal(mctx
, binderout
, &bindersize
) <= 0
1293 || bindersize
!= hashsize
) {
1294 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1301 /* HMAC keys can't do EVP_DigestVerify* - use CRYPTO_memcmp instead */
1302 ret
= (CRYPTO_memcmp(binderin
, binderout
, hashsize
) == 0);
1306 OPENSSL_cleanse(binderkey
, sizeof(binderkey
));
1307 OPENSSL_cleanse(finishedkey
, sizeof(finishedkey
));
1308 EVP_PKEY_free(mackey
);
1309 EVP_MD_CTX_free(mctx
);
1314 static int final_early_data(SSL
*s
, unsigned int context
, int sent
, int *al
)
1316 if (!s
->server
|| !sent
)
1319 if (s
->max_early_data
== 0
1321 || s
->session
->ext
.tick_identity
!= 0
1322 || s
->early_data_state
!= SSL_EARLY_DATA_ACCEPTING
1323 || !s
->ext
.early_data_ok
1324 || s
->hello_retry_request
1325 || s
->s3
->alpn_selected_len
!= s
->session
->ext
.alpn_selected_len
1326 || (s
->s3
->alpn_selected_len
> 0
1327 && memcmp(s
->s3
->alpn_selected
, s
->session
->ext
.alpn_selected
,
1328 s
->s3
->alpn_selected_len
) != 0)) {
1329 s
->ext
.early_data
= SSL_EARLY_DATA_REJECTED
;
1331 s
->ext
.early_data
= SSL_EARLY_DATA_ACCEPTED
;
1333 if (!tls13_change_cipher_state(s
,
1334 SSL3_CC_EARLY
| SSL3_CHANGE_CIPHER_SERVER_READ
)) {
1335 *al
= SSL_AD_INTERNAL_ERROR
;