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 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 * NOTE: WebSphere Application Server 7+ cannot handle empty extensions at
116 * the end, keep these extensions before signature_algorithm.
118 #define INVALID_EXTENSION { 0x10000, 0, NULL, NULL, NULL, NULL, NULL, NULL }
119 static const EXTENSION_DEFINITION ext_defs
[] = {
121 TLSEXT_TYPE_renegotiate
,
122 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
123 | SSL_EXT_SSL3_ALLOWED
| SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
124 NULL
, tls_parse_ctos_renegotiate
, tls_parse_stoc_renegotiate
,
125 tls_construct_stoc_renegotiate
, tls_construct_ctos_renegotiate
,
129 TLSEXT_TYPE_server_name
,
130 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
131 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
,
133 tls_parse_ctos_server_name
, tls_parse_stoc_server_name
,
134 tls_construct_stoc_server_name
, tls_construct_ctos_server_name
,
137 #ifndef OPENSSL_NO_SRP
140 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
141 init_srp
, tls_parse_ctos_srp
, NULL
, NULL
, tls_construct_ctos_srp
, NULL
146 #ifndef OPENSSL_NO_EC
148 TLSEXT_TYPE_ec_point_formats
,
149 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
150 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
151 NULL
, tls_parse_ctos_ec_pt_formats
, tls_parse_stoc_ec_pt_formats
,
152 tls_construct_stoc_ec_pt_formats
, tls_construct_ctos_ec_pt_formats
,
156 TLSEXT_TYPE_supported_groups
,
157 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
,
158 NULL
, tls_parse_ctos_supported_groups
, NULL
,
159 tls_construct_stoc_supported_groups
,
160 tls_construct_ctos_supported_groups
, NULL
167 TLSEXT_TYPE_session_ticket
,
168 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
169 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
170 init_session_ticket
, tls_parse_ctos_session_ticket
,
171 tls_parse_stoc_session_ticket
, tls_construct_stoc_session_ticket
,
172 tls_construct_ctos_session_ticket
, NULL
174 #ifndef OPENSSL_NO_OCSP
176 TLSEXT_TYPE_status_request
,
177 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
178 | SSL_EXT_TLS1_3_CERTIFICATE
,
179 init_status_request
, tls_parse_ctos_status_request
,
180 tls_parse_stoc_status_request
, tls_construct_stoc_status_request
,
181 tls_construct_ctos_status_request
, NULL
186 #ifndef OPENSSL_NO_NEXTPROTONEG
188 TLSEXT_TYPE_next_proto_neg
,
189 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
190 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
191 init_npn
, tls_parse_ctos_npn
, tls_parse_stoc_npn
,
192 tls_construct_stoc_next_proto_neg
, tls_construct_ctos_npn
, NULL
199 * Must appear in this list after server_name so that finalisation
200 * happens after server_name callbacks
202 TLSEXT_TYPE_application_layer_protocol_negotiation
,
203 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
204 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
,
205 init_alpn
, tls_parse_ctos_alpn
, tls_parse_stoc_alpn
,
206 tls_construct_stoc_alpn
, tls_construct_ctos_alpn
, NULL
208 #ifndef OPENSSL_NO_SRTP
210 TLSEXT_TYPE_use_srtp
,
211 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
212 | SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
| SSL_EXT_DTLS_ONLY
,
213 init_srtp
, tls_parse_ctos_use_srtp
, tls_parse_stoc_use_srtp
,
214 tls_construct_stoc_use_srtp
, tls_construct_ctos_use_srtp
, NULL
220 TLSEXT_TYPE_encrypt_then_mac
,
221 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
222 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
223 init_etm
, tls_parse_ctos_etm
, tls_parse_stoc_etm
,
224 tls_construct_stoc_etm
, tls_construct_ctos_etm
, NULL
226 #ifndef OPENSSL_NO_CT
228 TLSEXT_TYPE_signed_certificate_timestamp
,
229 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
230 | SSL_EXT_TLS1_3_CERTIFICATE
,
233 * No server side support for this, but can be provided by a custom
234 * extension. This is an exception to the rule that custom extensions
235 * cannot override built in ones.
237 NULL
, tls_parse_stoc_sct
, NULL
, tls_construct_ctos_sct
, NULL
243 TLSEXT_TYPE_extended_master_secret
,
244 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
245 | SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
246 init_ems
, tls_parse_ctos_ems
, tls_parse_stoc_ems
,
247 tls_construct_stoc_ems
, tls_construct_ctos_ems
, final_ems
250 TLSEXT_TYPE_signature_algorithms
,
251 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
,
252 init_sig_algs
, tls_parse_ctos_sig_algs
,
253 tls_parse_ctos_sig_algs
, tls_construct_ctos_sig_algs
,
254 tls_construct_ctos_sig_algs
, final_sig_algs
257 TLSEXT_TYPE_supported_versions
,
258 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS_IMPLEMENTATION_ONLY
259 | SSL_EXT_TLS1_3_ONLY
,
261 /* Processed inline as part of version selection */
262 NULL
, NULL
, NULL
, tls_construct_ctos_supported_versions
, NULL
265 TLSEXT_TYPE_psk_kex_modes
,
266 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS_IMPLEMENTATION_ONLY
267 | SSL_EXT_TLS1_3_ONLY
,
268 init_psk_kex_modes
, tls_parse_ctos_psk_kex_modes
, NULL
, NULL
,
269 tls_construct_ctos_psk_kex_modes
, NULL
271 #ifndef OPENSSL_NO_EC
274 * Must be in this list after supported_groups. We need that to have
275 * been parsed before we do this one.
277 TLSEXT_TYPE_key_share
,
278 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_SERVER_HELLO
279 | SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
| SSL_EXT_TLS_IMPLEMENTATION_ONLY
280 | SSL_EXT_TLS1_3_ONLY
,
281 NULL
, tls_parse_ctos_key_share
, tls_parse_stoc_key_share
,
282 tls_construct_stoc_key_share
, tls_construct_ctos_key_share
,
288 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
289 | SSL_EXT_TLS_IMPLEMENTATION_ONLY
| SSL_EXT_TLS1_3_ONLY
,
290 NULL
, NULL
, tls_parse_stoc_cookie
, NULL
, tls_construct_ctos_cookie
,
295 * Special unsolicited ServerHello extension only used when
296 * SSL_OP_CRYPTOPRO_TLSEXT_BUG is set
298 TLSEXT_TYPE_cryptopro_bug
,
299 SSL_EXT_TLS1_2_SERVER_HELLO
| SSL_EXT_TLS1_2_AND_BELOW_ONLY
,
300 NULL
, NULL
, NULL
, tls_construct_stoc_cryptopro_bug
, NULL
, NULL
303 TLSEXT_TYPE_early_data
,
304 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_ENCRYPTED_EXTENSIONS
305 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET
,
306 NULL
, tls_parse_ctos_early_data
, tls_parse_stoc_early_data
,
307 tls_construct_stoc_early_data
, tls_construct_ctos_early_data
,
311 TLSEXT_TYPE_certificate_authorities
,
312 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
313 | SSL_EXT_TLS1_3_ONLY
,
314 init_certificate_authorities
,
315 tls_parse_certificate_authorities
, tls_parse_certificate_authorities
,
316 tls_construct_certificate_authorities
,
317 tls_construct_certificate_authorities
, NULL
,
320 /* Must be immediately before pre_shared_key */
322 SSL_EXT_CLIENT_HELLO
,
324 /* We send this, but don't read it */
325 NULL
, NULL
, NULL
, tls_construct_ctos_padding
, NULL
328 /* Required by the TLSv1.3 spec to always be the last extension */
330 SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_3_SERVER_HELLO
331 | SSL_EXT_TLS_IMPLEMENTATION_ONLY
| SSL_EXT_TLS1_3_ONLY
,
332 NULL
, tls_parse_ctos_psk
, tls_parse_stoc_psk
, tls_construct_stoc_psk
,
333 tls_construct_ctos_psk
, NULL
337 /* Check whether an extension's context matches the current context */
338 static int validate_context(SSL
*s
, unsigned int extctx
, unsigned int thisctx
)
340 /* Check we're allowed to use this extension in this context */
341 if ((thisctx
& extctx
) == 0)
344 if (SSL_IS_DTLS(s
)) {
345 if ((extctx
& SSL_EXT_TLS_ONLY
) != 0)
347 } else if ((extctx
& SSL_EXT_DTLS_ONLY
) != 0) {
355 * Verify whether we are allowed to use the extension |type| in the current
356 * |context|. Returns 1 to indicate the extension is allowed or unknown or 0 to
357 * indicate the extension is not allowed. If returning 1 then |*found| is set to
358 * the definition for the extension we found.
360 static int verify_extension(SSL
*s
, unsigned int context
, unsigned int type
,
361 custom_ext_methods
*meths
, RAW_EXTENSION
*rawexlist
,
362 RAW_EXTENSION
**found
)
365 size_t builtin_num
= OSSL_NELEM(ext_defs
);
366 const EXTENSION_DEFINITION
*thisext
;
368 for (i
= 0, thisext
= ext_defs
; i
< builtin_num
; i
++, thisext
++) {
369 if (type
== thisext
->type
) {
370 if (!validate_context(s
, thisext
->context
, context
))
373 *found
= &rawexlist
[i
];
378 /* Check the custom extensions */
381 ENDPOINT role
= ENDPOINT_BOTH
;
382 custom_ext_method
*meth
= NULL
;
384 if ((context
& SSL_EXT_CLIENT_HELLO
) != 0)
385 role
= ENDPOINT_SERVER
;
386 else if ((context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0)
387 role
= ENDPOINT_CLIENT
;
389 meth
= custom_ext_find(meths
, role
, type
, &offset
);
391 if (!validate_context(s
, meth
->context
, context
))
393 *found
= &rawexlist
[offset
+ builtin_num
];
398 /* Unknown extension. We allow it */
404 * Check whether the context defined for an extension |extctx| means whether
405 * the extension is relevant for the current context |thisctx| or not. Returns
406 * 1 if the extension is relevant for this context, and 0 otherwise
408 int extension_is_relevant(SSL
*s
, unsigned int extctx
, unsigned int thisctx
)
411 && (extctx
& SSL_EXT_TLS_IMPLEMENTATION_ONLY
) != 0)
412 || (s
->version
== SSL3_VERSION
413 && (extctx
& SSL_EXT_SSL3_ALLOWED
) == 0)
415 && (extctx
& SSL_EXT_TLS1_2_AND_BELOW_ONLY
) != 0)
416 || (!SSL_IS_TLS13(s
) && (extctx
& SSL_EXT_TLS1_3_ONLY
) != 0)
417 || (s
->hit
&& (extctx
& SSL_EXT_IGNORE_ON_RESUMPTION
) != 0))
424 * Gather a list of all the extensions from the data in |packet]. |context|
425 * tells us which message this extension is for. The raw extension data is
426 * stored in |*res| on success. In the event of an error the alert type to use
427 * is stored in |*al|. We don't actually process the content of the extensions
428 * yet, except to check their types. This function also runs the initialiser
429 * functions for all known extensions if |init| is nonzero (whether we have
430 * collected them or not). If successful the caller is responsible for freeing
431 * the contents of |*res|.
433 * Per http://tools.ietf.org/html/rfc5246#section-7.4.1.4, there may not be
434 * more than one extension of the same type in a ClientHello or ServerHello.
435 * This function returns 1 if all extensions are unique and we have parsed their
436 * types, and 0 if the extensions contain duplicates, could not be successfully
437 * found, or an internal error occurred. We only check duplicates for
438 * extensions that we know about. We ignore others.
440 int tls_collect_extensions(SSL
*s
, PACKET
*packet
, unsigned int context
,
441 RAW_EXTENSION
**res
, int *al
, size_t *len
,
444 PACKET extensions
= *packet
;
447 custom_ext_methods
*exts
= &s
->cert
->custext
;
448 RAW_EXTENSION
*raw_extensions
= NULL
;
449 const EXTENSION_DEFINITION
*thisexd
;
454 * Initialise server side custom extensions. Client side is done during
455 * construction of extensions for the ClientHello.
457 if ((context
& SSL_EXT_CLIENT_HELLO
) != 0)
458 custom_ext_init(&s
->cert
->custext
);
460 num_exts
= OSSL_NELEM(ext_defs
) + (exts
!= NULL
? exts
->meths_count
: 0);
461 raw_extensions
= OPENSSL_zalloc(num_exts
* sizeof(*raw_extensions
));
462 if (raw_extensions
== NULL
) {
463 *al
= SSL_AD_INTERNAL_ERROR
;
464 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS
, ERR_R_MALLOC_FAILURE
);
469 while (PACKET_remaining(&extensions
) > 0) {
470 unsigned int type
, idx
;
472 RAW_EXTENSION
*thisex
;
474 if (!PACKET_get_net_2(&extensions
, &type
) ||
475 !PACKET_get_length_prefixed_2(&extensions
, &extension
)) {
476 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS
, SSL_R_BAD_EXTENSION
);
477 *al
= SSL_AD_DECODE_ERROR
;
481 * Verify this extension is allowed. We only check duplicates for
482 * extensions that we recognise. We also have a special case for the
483 * PSK extension, which must be the last one in the ClientHello.
485 if (!verify_extension(s
, context
, type
, exts
, raw_extensions
, &thisex
)
486 || (thisex
!= NULL
&& thisex
->present
== 1)
487 || (type
== TLSEXT_TYPE_psk
488 && (context
& SSL_EXT_CLIENT_HELLO
) != 0
489 && PACKET_remaining(&extensions
) != 0)) {
490 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS
, SSL_R_BAD_EXTENSION
);
491 *al
= SSL_AD_ILLEGAL_PARAMETER
;
494 idx
= thisex
- raw_extensions
;
496 * Check that we requested this extension (if appropriate). Requests can
497 * be sent in the ClientHello and CertificateRequest. Unsolicited
498 * extensions can be sent in the NewSessionTicket. We only do this for
499 * the built-in extensions. Custom extensions have a different but
500 * similar check elsewhere.
502 * - The HRR cookie extension is unsolicited
503 * - The renegotiate extension is unsolicited (the client signals
504 * support via an SCSV)
505 * - The signed_certificate_timestamp extension can be provided by a
506 * custom extension or by the built-in version. We let the extension
507 * itself handle unsolicited response checks.
509 if (idx
< OSSL_NELEM(ext_defs
)
510 && (context
& (SSL_EXT_CLIENT_HELLO
511 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
512 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET
)) == 0
513 && type
!= TLSEXT_TYPE_cookie
514 && type
!= TLSEXT_TYPE_renegotiate
515 && type
!= TLSEXT_TYPE_signed_certificate_timestamp
516 && (s
->ext
.extflags
[idx
] & SSL_EXT_FLAG_SENT
) == 0) {
517 SSLerr(SSL_F_TLS_COLLECT_EXTENSIONS
, SSL_R_UNSOLICITED_EXTENSION
);
518 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
521 if (thisex
!= NULL
) {
522 thisex
->data
= extension
;
525 thisex
->received_order
= i
++;
527 s
->ext
.debug_cb(s
, !s
->server
, thisex
->type
,
528 PACKET_data(&thisex
->data
),
529 PACKET_remaining(&thisex
->data
),
536 * Initialise all known extensions relevant to this context,
537 * whether we have found them or not
539 for (thisexd
= ext_defs
, i
= 0; i
< OSSL_NELEM(ext_defs
);
541 if (thisexd
->init
!= NULL
&& (thisexd
->context
& context
) != 0
542 && extension_is_relevant(s
, thisexd
->context
, context
)
543 && !thisexd
->init(s
, context
)) {
544 *al
= SSL_AD_INTERNAL_ERROR
;
550 *res
= raw_extensions
;
556 OPENSSL_free(raw_extensions
);
561 * Runs the parser for a given extension with index |idx|. |exts| contains the
562 * list of all parsed extensions previously collected by
563 * tls_collect_extensions(). The parser is only run if it is applicable for the
564 * given |context| and the parser has not already been run. If this is for a
565 * Certificate message, then we also provide the parser with the relevant
566 * Certificate |x| and its position in the |chainidx| with 0 being the first
567 * Certificate. Returns 1 on success or 0 on failure. In the event of a failure
568 * |*al| is populated with a suitable alert code. If an extension is not present
569 * this counted as success.
571 int tls_parse_extension(SSL
*s
, TLSEXT_INDEX idx
, int context
,
572 RAW_EXTENSION
*exts
, X509
*x
, size_t chainidx
, int *al
)
574 RAW_EXTENSION
*currext
= &exts
[idx
];
575 int (*parser
)(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
576 size_t chainidx
, int *al
) = NULL
;
578 /* Skip if the extension is not present */
579 if (!currext
->present
)
582 /* Skip if we've already parsed this extension */
588 if (idx
< OSSL_NELEM(ext_defs
)) {
589 /* We are handling a built-in extension */
590 const EXTENSION_DEFINITION
*extdef
= &ext_defs
[idx
];
592 /* Check if extension is defined for our protocol. If not, skip */
593 if (!extension_is_relevant(s
, extdef
->context
, context
))
596 parser
= s
->server
? extdef
->parse_ctos
: extdef
->parse_stoc
;
599 return parser(s
, &currext
->data
, context
, x
, chainidx
, al
);
602 * If the parser is NULL we fall through to the custom extension
607 /* Parse custom extensions */
608 if (custom_ext_parse(s
, context
, currext
->type
,
609 PACKET_data(&currext
->data
),
610 PACKET_remaining(&currext
->data
),
611 x
, chainidx
, al
) <= 0)
618 * Parse all remaining extensions that have not yet been parsed. Also calls the
619 * finalisation for all extensions at the end if |fin| is nonzero, whether we
620 * collected them or not. Returns 1 for success or 0 for failure. If we are
621 * working on a Certificate message then we also pass the Certificate |x| and
622 * its position in the |chainidx|, with 0 being the first certificate. On
623 * failure, |*al| is populated with a suitable alert code.
625 int tls_parse_all_extensions(SSL
*s
, int context
, RAW_EXTENSION
*exts
, X509
*x
,
626 size_t chainidx
, int *al
, int fin
)
628 size_t i
, numexts
= OSSL_NELEM(ext_defs
);
629 const EXTENSION_DEFINITION
*thisexd
;
631 /* Calculate the number of extensions in the extensions list */
632 numexts
+= s
->cert
->custext
.meths_count
;
634 /* Parse each extension in turn */
635 for (i
= 0; i
< numexts
; i
++) {
636 if (!tls_parse_extension(s
, i
, context
, exts
, x
, chainidx
, al
))
642 * Finalise all known extensions relevant to this context,
643 * whether we have found them or not
645 for (i
= 0, thisexd
= ext_defs
; i
< OSSL_NELEM(ext_defs
);
647 if (thisexd
->final
!= NULL
&& (thisexd
->context
& context
) != 0
648 && !thisexd
->final(s
, context
, exts
[i
].present
, al
))
656 int should_add_extension(SSL
*s
, unsigned int extctx
, unsigned int thisctx
,
659 /* Skip if not relevant for our context */
660 if ((extctx
& thisctx
) == 0)
663 /* Check if this extension is defined for our protocol. If not, skip */
664 if ((SSL_IS_DTLS(s
) && (extctx
& SSL_EXT_TLS_IMPLEMENTATION_ONLY
) != 0)
665 || (s
->version
== SSL3_VERSION
666 && (extctx
& SSL_EXT_SSL3_ALLOWED
) == 0)
668 && (extctx
& SSL_EXT_TLS1_2_AND_BELOW_ONLY
) != 0)
670 && (extctx
& SSL_EXT_TLS1_3_ONLY
) != 0
671 && (thisctx
& SSL_EXT_CLIENT_HELLO
) == 0)
672 || ((extctx
& SSL_EXT_TLS1_3_ONLY
) != 0
673 && (thisctx
& SSL_EXT_CLIENT_HELLO
) != 0
674 && (SSL_IS_DTLS(s
) || max_version
< TLS1_3_VERSION
)))
681 * Construct all the extensions relevant to the current |context| and write
682 * them to |pkt|. If this is an extension for a Certificate in a Certificate
683 * message, then |x| will be set to the Certificate we are handling, and
684 * |chainidx| will indicate the position in the chainidx we are processing (with
685 * 0 being the first in the chain). Returns 1 on success or 0 on failure. If a
686 * failure occurs then |al| is populated with a suitable alert code. On a
687 * failure construction stops at the first extension to fail to construct.
689 int tls_construct_extensions(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
690 X509
*x
, size_t chainidx
, int *al
)
693 int min_version
, max_version
= 0, reason
, tmpal
;
694 const EXTENSION_DEFINITION
*thisexd
;
697 * Normally if something goes wrong during construction it's an internal
698 * error. We can always override this later.
700 tmpal
= SSL_AD_INTERNAL_ERROR
;
702 if (!WPACKET_start_sub_packet_u16(pkt
)
704 * If extensions are of zero length then we don't even add the
705 * extensions length bytes to a ClientHello/ServerHello in SSLv3
708 (SSL_EXT_CLIENT_HELLO
| SSL_EXT_TLS1_2_SERVER_HELLO
)) != 0
709 && s
->version
== SSL3_VERSION
710 && !WPACKET_set_flags(pkt
,
711 WPACKET_FLAGS_ABANDON_ON_ZERO_LENGTH
))) {
712 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS
, ERR_R_INTERNAL_ERROR
);
716 if ((context
& SSL_EXT_CLIENT_HELLO
) != 0) {
717 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
);
719 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS
, reason
);
724 /* Add custom extensions first */
725 if ((context
& SSL_EXT_CLIENT_HELLO
) != 0) {
726 /* On the server side with initialise during ClientHello parsing */
727 custom_ext_init(&s
->cert
->custext
);
729 if (!custom_ext_add(s
, context
, pkt
, x
, chainidx
, max_version
, &tmpal
)) {
730 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS
, ERR_R_INTERNAL_ERROR
);
734 for (i
= 0, thisexd
= ext_defs
; i
< OSSL_NELEM(ext_defs
); i
++, thisexd
++) {
735 EXT_RETURN (*construct
)(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
736 X509
*x
, size_t chainidx
, int *al
);
739 /* Skip if not relevant for our context */
740 if (!should_add_extension(s
, thisexd
->context
, context
, max_version
))
743 construct
= s
->server
? thisexd
->construct_stoc
744 : thisexd
->construct_ctos
;
746 if (construct
== NULL
)
749 ret
= construct(s
, pkt
, context
, x
, chainidx
, &tmpal
);
750 if (ret
== EXT_RETURN_FAIL
)
752 if (ret
== EXT_RETURN_SENT
753 && (context
& (SSL_EXT_CLIENT_HELLO
754 | SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
755 | SSL_EXT_TLS1_3_NEW_SESSION_TICKET
)) != 0)
756 s
->ext
.extflags
[i
] |= SSL_EXT_FLAG_SENT
;
759 if (!WPACKET_close(pkt
)) {
760 SSLerr(SSL_F_TLS_CONSTRUCT_EXTENSIONS
, ERR_R_INTERNAL_ERROR
);
772 * Built in extension finalisation and initialisation functions. All initialise
773 * or finalise the associated extension type for the given |context|. For
774 * finalisers |sent| is set to 1 if we saw the extension during parsing, and 0
775 * otherwise. These functions return 1 on success or 0 on failure. In the event
776 * of a failure then |*al| is populated with a suitable error code.
779 static int final_renegotiate(SSL
*s
, unsigned int context
, int sent
,
784 * Check if we can connect to a server that doesn't support safe
787 if (!(s
->options
& SSL_OP_LEGACY_SERVER_CONNECT
)
788 && !(s
->options
& SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
)
790 *al
= SSL_AD_HANDSHAKE_FAILURE
;
791 SSLerr(SSL_F_FINAL_RENEGOTIATE
,
792 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED
);
799 /* Need RI if renegotiating */
801 && !(s
->options
& SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION
)
803 *al
= SSL_AD_HANDSHAKE_FAILURE
;
804 SSLerr(SSL_F_FINAL_RENEGOTIATE
,
805 SSL_R_UNSAFE_LEGACY_RENEGOTIATION_DISABLED
);
813 static int init_server_name(SSL
*s
, unsigned int context
)
816 s
->servername_done
= 0;
821 static int final_server_name(SSL
*s
, unsigned int context
, int sent
,
824 int ret
= SSL_TLSEXT_ERR_NOACK
;
825 int altmp
= SSL_AD_UNRECOGNIZED_NAME
;
827 if (s
->ctx
!= NULL
&& s
->ctx
->ext
.servername_cb
!= 0)
828 ret
= s
->ctx
->ext
.servername_cb(s
, &altmp
,
829 s
->ctx
->ext
.servername_arg
);
830 else if (s
->session_ctx
!= NULL
831 && s
->session_ctx
->ext
.servername_cb
!= 0)
832 ret
= s
->session_ctx
->ext
.servername_cb(s
, &altmp
,
833 s
->session_ctx
->ext
.servername_arg
);
836 case SSL_TLSEXT_ERR_ALERT_FATAL
:
840 case SSL_TLSEXT_ERR_ALERT_WARNING
:
844 case SSL_TLSEXT_ERR_NOACK
:
845 s
->servername_done
= 0;
853 #ifndef OPENSSL_NO_EC
854 static int final_ec_pt_formats(SSL
*s
, unsigned int context
, int sent
,
857 unsigned long alg_k
, alg_a
;
862 alg_k
= s
->s3
->tmp
.new_cipher
->algorithm_mkey
;
863 alg_a
= s
->s3
->tmp
.new_cipher
->algorithm_auth
;
866 * If we are client and using an elliptic curve cryptography cipher
867 * suite, then if server returns an EC point formats lists extension it
868 * must contain uncompressed.
870 if (s
->ext
.ecpointformats
!= NULL
871 && s
->ext
.ecpointformats_len
> 0
872 && s
->session
->ext
.ecpointformats
!= NULL
873 && s
->session
->ext
.ecpointformats_len
> 0
874 && ((alg_k
& SSL_kECDHE
) || (alg_a
& SSL_aECDSA
))) {
875 /* we are using an ECC cipher */
877 unsigned char *list
= s
->session
->ext
.ecpointformats
;
879 for (i
= 0; i
< s
->session
->ext
.ecpointformats_len
; i
++) {
880 if (*list
++ == TLSEXT_ECPOINTFORMAT_uncompressed
)
883 if (i
== s
->session
->ext
.ecpointformats_len
) {
884 SSLerr(SSL_F_FINAL_EC_PT_FORMATS
,
885 SSL_R_TLS_INVALID_ECPOINTFORMAT_LIST
);
894 static int init_session_ticket(SSL
*s
, unsigned int context
)
897 s
->ext
.ticket_expected
= 0;
902 #ifndef OPENSSL_NO_OCSP
903 static int init_status_request(SSL
*s
, unsigned int context
)
906 s
->ext
.status_type
= TLSEXT_STATUSTYPE_nothing
;
909 * Ensure we get sensible values passed to tlsext_status_cb in the event
910 * that we don't receive a status message
912 OPENSSL_free(s
->ext
.ocsp
.resp
);
913 s
->ext
.ocsp
.resp
= NULL
;
914 s
->ext
.ocsp
.resp_len
= 0;
921 #ifndef OPENSSL_NO_NEXTPROTONEG
922 static int init_npn(SSL
*s
, unsigned int context
)
930 static int init_alpn(SSL
*s
, unsigned int context
)
932 OPENSSL_free(s
->s3
->alpn_selected
);
933 s
->s3
->alpn_selected
= NULL
;
934 s
->s3
->alpn_selected_len
= 0;
936 OPENSSL_free(s
->s3
->alpn_proposed
);
937 s
->s3
->alpn_proposed
= NULL
;
938 s
->s3
->alpn_proposed_len
= 0;
943 static int init_sig_algs(SSL
*s
, unsigned int context
)
945 /* Clear any signature algorithms extension received */
946 OPENSSL_free(s
->s3
->tmp
.peer_sigalgs
);
947 s
->s3
->tmp
.peer_sigalgs
= NULL
;
952 #ifndef OPENSSL_NO_SRP
953 static int init_srp(SSL
*s
, unsigned int context
)
955 OPENSSL_free(s
->srp_ctx
.login
);
956 s
->srp_ctx
.login
= NULL
;
962 static int init_etm(SSL
*s
, unsigned int context
)
969 static int init_ems(SSL
*s
, unsigned int context
)
972 s
->s3
->flags
&= ~TLS1_FLAGS_RECEIVED_EXTMS
;
977 static int final_ems(SSL
*s
, unsigned int context
, int sent
, int *al
)
979 if (!s
->server
&& s
->hit
) {
981 * Check extended master secret extension is consistent with
984 if (!(s
->s3
->flags
& TLS1_FLAGS_RECEIVED_EXTMS
) !=
985 !(s
->session
->flags
& SSL_SESS_FLAG_EXTMS
)) {
986 *al
= SSL_AD_HANDSHAKE_FAILURE
;
987 SSLerr(SSL_F_FINAL_EMS
, SSL_R_INCONSISTENT_EXTMS
);
995 static int init_certificate_authorities(SSL
*s
, unsigned int context
)
997 sk_X509_NAME_pop_free(s
->s3
->tmp
.peer_ca_names
, X509_NAME_free
);
998 s
->s3
->tmp
.peer_ca_names
= NULL
;
1002 static EXT_RETURN
tls_construct_certificate_authorities(SSL
*s
, WPACKET
*pkt
,
1003 unsigned int context
,
1008 const STACK_OF(X509_NAME
) *ca_sk
= SSL_get0_CA_list(s
);
1010 if (ca_sk
== NULL
|| sk_X509_NAME_num(ca_sk
) == 0)
1011 return EXT_RETURN_NOT_SENT
;
1013 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_certificate_authorities
)
1014 || !WPACKET_start_sub_packet_u16(pkt
)
1015 || !construct_ca_names(s
, pkt
)
1016 || !WPACKET_close(pkt
)) {
1017 SSLerr(SSL_F_TLS_CONSTRUCT_CERTIFICATE_AUTHORITIES
,
1018 ERR_R_INTERNAL_ERROR
);
1019 return EXT_RETURN_FAIL
;
1022 return EXT_RETURN_SENT
;
1025 static int tls_parse_certificate_authorities(SSL
*s
, PACKET
*pkt
,
1026 unsigned int context
, X509
*x
,
1027 size_t chainidx
, int *al
)
1029 if (!parse_ca_names(s
, pkt
, al
))
1031 if (PACKET_remaining(pkt
) != 0) {
1032 *al
= SSL_AD_DECODE_ERROR
;
1038 #ifndef OPENSSL_NO_SRTP
1039 static int init_srtp(SSL
*s
, unsigned int context
)
1042 s
->srtp_profile
= NULL
;
1048 static int final_sig_algs(SSL
*s
, unsigned int context
, int sent
, int *al
)
1050 if (!sent
&& SSL_IS_TLS13(s
) && !s
->hit
) {
1051 *al
= TLS13_AD_MISSING_EXTENSION
;
1052 SSLerr(SSL_F_FINAL_SIG_ALGS
, SSL_R_MISSING_SIGALGS_EXTENSION
);
1059 #ifndef OPENSSL_NO_EC
1060 static int final_key_share(SSL
*s
, unsigned int context
, int sent
, int *al
)
1062 if (!SSL_IS_TLS13(s
))
1065 /* Nothing to do for key_share in an HRR */
1066 if ((context
& SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
) != 0)
1073 * we have no key_share
1075 * (we are not resuming
1076 * OR the kex_mode doesn't allow non key_share resumes)
1083 || (s
->ext
.psk_kex_mode
& TLSEXT_KEX_MODE_FLAG_KE
) == 0)) {
1084 /* Nothing left we can do - just fail */
1085 *al
= SSL_AD_MISSING_EXTENSION
;
1086 SSLerr(SSL_F_FINAL_KEY_SHARE
, SSL_R_NO_SUITABLE_KEY_SHARE
);
1093 * we have no key_share
1096 * we didn't already send a HelloRetryRequest
1098 * the client sent a key_share extension
1100 * (we are not resuming
1101 * OR the kex_mode allows key_share resumes)
1103 * a shared group exists
1105 * send a HelloRetryRequest
1107 * we are not resuming
1109 * the kex_mode doesn't allow non key_share resumes
1113 if (s
->server
&& s
->s3
->peer_tmp
== NULL
) {
1114 /* No suitable share */
1115 if (s
->hello_retry_request
== 0 && sent
1117 || (s
->ext
.psk_kex_mode
& TLSEXT_KEX_MODE_FLAG_KE_DHE
)
1119 const unsigned char *pcurves
, *pcurvestmp
, *clntcurves
;
1120 size_t num_curves
, clnt_num_curves
, i
;
1121 unsigned int group_id
= 0;
1123 /* Check if a shared group exists */
1125 /* Get the clients list of supported groups. */
1126 if (!tls1_get_curvelist(s
, 1, &clntcurves
, &clnt_num_curves
)) {
1127 *al
= SSL_AD_INTERNAL_ERROR
;
1128 SSLerr(SSL_F_FINAL_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1132 /* Get our list of available groups */
1133 if (!tls1_get_curvelist(s
, 0, &pcurves
, &num_curves
)) {
1134 *al
= SSL_AD_INTERNAL_ERROR
;
1135 SSLerr(SSL_F_FINAL_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1139 /* Find the first group we allow that is also in client's list */
1140 for (i
= 0, pcurvestmp
= pcurves
; i
< num_curves
;
1141 i
++, pcurvestmp
+= 2) {
1142 group_id
= bytestogroup(pcurvestmp
);
1144 if (check_in_list(s
, group_id
, clntcurves
, clnt_num_curves
, 1))
1148 if (i
< num_curves
) {
1149 /* A shared group exists so send a HelloRetryRequest */
1150 s
->s3
->group_id
= group_id
;
1151 s
->hello_retry_request
= 1;
1156 || (s
->ext
.psk_kex_mode
& TLSEXT_KEX_MODE_FLAG_KE
) == 0) {
1157 /* Nothing left we can do - just fail */
1159 *al
= SSL_AD_MISSING_EXTENSION
;
1161 *al
= SSL_AD_HANDSHAKE_FAILURE
;
1162 SSLerr(SSL_F_FINAL_KEY_SHARE
, SSL_R_NO_SUITABLE_KEY_SHARE
);
1167 /* We have a key_share so don't send any more HelloRetryRequest messages */
1169 s
->hello_retry_request
= 0;
1172 * For a client side resumption with no key_share we need to generate
1173 * the handshake secret (otherwise this is done during key_share
1176 if (!sent
&& !s
->server
&& !tls13_generate_handshake_secret(s
, NULL
, 0)) {
1177 *al
= SSL_AD_INTERNAL_ERROR
;
1178 SSLerr(SSL_F_FINAL_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1186 static int init_psk_kex_modes(SSL
*s
, unsigned int context
)
1188 s
->ext
.psk_kex_mode
= TLSEXT_KEX_MODE_FLAG_NONE
;
1192 int tls_psk_do_binder(SSL
*s
, const EVP_MD
*md
, const unsigned char *msgstart
,
1193 size_t binderoffset
, const unsigned char *binderin
,
1194 unsigned char *binderout
, SSL_SESSION
*sess
, int sign
,
1197 EVP_PKEY
*mackey
= NULL
;
1198 EVP_MD_CTX
*mctx
= NULL
;
1199 unsigned char hash
[EVP_MAX_MD_SIZE
], binderkey
[EVP_MAX_MD_SIZE
];
1200 unsigned char finishedkey
[EVP_MAX_MD_SIZE
], tmpbinder
[EVP_MAX_MD_SIZE
];
1201 unsigned char tmppsk
[EVP_MAX_MD_SIZE
];
1202 unsigned char *early_secret
, *psk
;
1203 const char resumption_label
[] = "res binder";
1204 const char external_label
[] = "ext binder";
1205 const char nonce_label
[] = "resumption";
1207 size_t bindersize
, labelsize
, hashsize
= EVP_MD_size(md
);
1211 label
= external_label
;
1212 labelsize
= sizeof(external_label
) - 1;
1214 label
= resumption_label
;
1215 labelsize
= sizeof(resumption_label
) - 1;
1218 if (sess
->master_key_length
!= hashsize
) {
1219 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, SSL_R_BAD_PSK
);
1224 psk
= sess
->master_key
;
1227 if (!tls13_hkdf_expand(s
, md
, sess
->master_key
,
1228 (const unsigned char *)nonce_label
,
1229 sizeof(nonce_label
) - 1, sess
->ext
.tick_nonce
,
1230 sess
->ext
.tick_nonce_len
, psk
, hashsize
)) {
1231 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1237 * Generate the early_secret. On the server side we've selected a PSK to
1238 * resume with (internal or external) so we always do this. On the client
1239 * side we do this for a non-external (i.e. resumption) PSK so that it
1240 * is in place for sending early data. For client side external PSK we
1241 * generate it but store it away for later use.
1243 if (s
->server
|| !external
)
1244 early_secret
= (unsigned char *)s
->early_secret
;
1246 early_secret
= (unsigned char *)sess
->early_secret
;
1247 if (!tls13_generate_secret(s
, md
, NULL
, psk
, hashsize
, early_secret
)) {
1248 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1253 * Create the handshake hash for the binder key...the messages so far are
1256 mctx
= EVP_MD_CTX_new();
1258 || EVP_DigestInit_ex(mctx
, md
, NULL
) <= 0
1259 || EVP_DigestFinal_ex(mctx
, hash
, NULL
) <= 0) {
1260 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1264 /* Generate the binder key */
1265 if (!tls13_hkdf_expand(s
, md
, early_secret
, (unsigned char *)label
,
1266 labelsize
, hash
, hashsize
, binderkey
, hashsize
)) {
1267 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1271 /* Generate the finished key */
1272 if (!tls13_derive_finishedkey(s
, md
, binderkey
, finishedkey
, hashsize
)) {
1273 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1277 if (EVP_DigestInit_ex(mctx
, md
, NULL
) <= 0) {
1278 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1283 * Get a hash of the ClientHello up to the start of the binders. If we are
1284 * following a HelloRetryRequest then this includes the hash of the first
1285 * ClientHello and the HelloRetryRequest itself.
1287 if (s
->hello_retry_request
) {
1291 hdatalen
= BIO_get_mem_data(s
->s3
->handshake_buffer
, &hdata
);
1292 if (hdatalen
<= 0) {
1293 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, SSL_R_BAD_HANDSHAKE_LENGTH
);
1298 * For servers the handshake buffer data will include the second
1299 * ClientHello - which we don't want - so we need to take that bit off.
1302 PACKET hashprefix
, msg
;
1304 /* Find how many bytes are left after the first two messages */
1305 if (!PACKET_buf_init(&hashprefix
, hdata
, hdatalen
)
1306 || !PACKET_forward(&hashprefix
, 1)
1307 || !PACKET_get_length_prefixed_3(&hashprefix
, &msg
)
1308 || !PACKET_forward(&hashprefix
, 1)
1309 || !PACKET_get_length_prefixed_3(&hashprefix
, &msg
)) {
1310 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1313 hdatalen
-= PACKET_remaining(&hashprefix
);
1316 if (EVP_DigestUpdate(mctx
, hdata
, hdatalen
) <= 0) {
1317 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1322 if (EVP_DigestUpdate(mctx
, msgstart
, binderoffset
) <= 0
1323 || EVP_DigestFinal_ex(mctx
, hash
, NULL
) <= 0) {
1324 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1328 mackey
= EVP_PKEY_new_mac_key(EVP_PKEY_HMAC
, NULL
, finishedkey
, hashsize
);
1329 if (mackey
== NULL
) {
1330 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1335 binderout
= tmpbinder
;
1337 bindersize
= hashsize
;
1338 if (EVP_DigestSignInit(mctx
, NULL
, md
, NULL
, mackey
) <= 0
1339 || EVP_DigestSignUpdate(mctx
, hash
, hashsize
) <= 0
1340 || EVP_DigestSignFinal(mctx
, binderout
, &bindersize
) <= 0
1341 || bindersize
!= hashsize
) {
1342 SSLerr(SSL_F_TLS_PSK_DO_BINDER
, ERR_R_INTERNAL_ERROR
);
1349 /* HMAC keys can't do EVP_DigestVerify* - use CRYPTO_memcmp instead */
1350 ret
= (CRYPTO_memcmp(binderin
, binderout
, hashsize
) == 0);
1354 OPENSSL_cleanse(binderkey
, sizeof(binderkey
));
1355 OPENSSL_cleanse(finishedkey
, sizeof(finishedkey
));
1356 EVP_PKEY_free(mackey
);
1357 EVP_MD_CTX_free(mctx
);
1362 static int final_early_data(SSL
*s
, unsigned int context
, int sent
, int *al
)
1364 if (!s
->server
|| !sent
)
1367 if (s
->max_early_data
== 0
1369 || s
->session
->ext
.tick_identity
!= 0
1370 || s
->early_data_state
!= SSL_EARLY_DATA_ACCEPTING
1371 || !s
->ext
.early_data_ok
1372 || s
->hello_retry_request
1373 || s
->s3
->alpn_selected_len
!= s
->session
->ext
.alpn_selected_len
1374 || (s
->s3
->alpn_selected_len
> 0
1375 && memcmp(s
->s3
->alpn_selected
, s
->session
->ext
.alpn_selected
,
1376 s
->s3
->alpn_selected_len
) != 0)) {
1377 s
->ext
.early_data
= SSL_EARLY_DATA_REJECTED
;
1379 s
->ext
.early_data
= SSL_EARLY_DATA_ACCEPTED
;
1381 if (!tls13_change_cipher_state(s
,
1382 SSL3_CC_EARLY
| SSL3_CHANGE_CIPHER_SERVER_READ
)) {
1383 *al
= SSL_AD_INTERNAL_ERROR
;