2 * Copyright 2016-2020 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the Apache License 2.0 (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
10 #include <openssl/ocsp.h>
11 #include "../ssl_local.h"
12 #include "internal/cryptlib.h"
13 #include "statem_local.h"
15 EXT_RETURN
tls_construct_ctos_renegotiate(SSL
*s
, WPACKET
*pkt
,
16 unsigned int context
, X509
*x
,
19 /* Add RI if renegotiating */
21 return EXT_RETURN_NOT_SENT
;
23 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_renegotiate
)
24 || !WPACKET_start_sub_packet_u16(pkt
)
25 || !WPACKET_sub_memcpy_u8(pkt
, s
->s3
.previous_client_finished
,
26 s
->s3
.previous_client_finished_len
)
27 || !WPACKET_close(pkt
)) {
28 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE
,
29 ERR_R_INTERNAL_ERROR
);
30 return EXT_RETURN_FAIL
;
33 return EXT_RETURN_SENT
;
36 EXT_RETURN
tls_construct_ctos_server_name(SSL
*s
, WPACKET
*pkt
,
37 unsigned int context
, X509
*x
,
40 if (s
->ext
.hostname
== NULL
)
41 return EXT_RETURN_NOT_SENT
;
43 /* Add TLS extension servername to the Client Hello message */
44 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_server_name
)
45 /* Sub-packet for server_name extension */
46 || !WPACKET_start_sub_packet_u16(pkt
)
47 /* Sub-packet for servername list (always 1 hostname)*/
48 || !WPACKET_start_sub_packet_u16(pkt
)
49 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_NAMETYPE_host_name
)
50 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.hostname
,
51 strlen(s
->ext
.hostname
))
52 || !WPACKET_close(pkt
)
53 || !WPACKET_close(pkt
)) {
54 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME
,
55 ERR_R_INTERNAL_ERROR
);
56 return EXT_RETURN_FAIL
;
59 return EXT_RETURN_SENT
;
62 /* Push a Max Fragment Len extension into ClientHello */
63 EXT_RETURN
tls_construct_ctos_maxfragmentlen(SSL
*s
, WPACKET
*pkt
,
64 unsigned int context
, X509
*x
,
67 if (s
->ext
.max_fragment_len_mode
== TLSEXT_max_fragment_length_DISABLED
)
68 return EXT_RETURN_NOT_SENT
;
70 /* Add Max Fragment Length extension if client enabled it. */
72 * 4 bytes for this extension type and extension length
73 * 1 byte for the Max Fragment Length code value.
75 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_max_fragment_length
)
76 /* Sub-packet for Max Fragment Length extension (1 byte) */
77 || !WPACKET_start_sub_packet_u16(pkt
)
78 || !WPACKET_put_bytes_u8(pkt
, s
->ext
.max_fragment_len_mode
)
79 || !WPACKET_close(pkt
)) {
80 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
81 SSL_F_TLS_CONSTRUCT_CTOS_MAXFRAGMENTLEN
, ERR_R_INTERNAL_ERROR
);
82 return EXT_RETURN_FAIL
;
85 return EXT_RETURN_SENT
;
88 #ifndef OPENSSL_NO_SRP
89 EXT_RETURN
tls_construct_ctos_srp(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
90 X509
*x
, size_t chainidx
)
92 /* Add SRP username if there is one */
93 if (s
->srp_ctx
.login
== NULL
)
94 return EXT_RETURN_NOT_SENT
;
96 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_srp
)
97 /* Sub-packet for SRP extension */
98 || !WPACKET_start_sub_packet_u16(pkt
)
99 || !WPACKET_start_sub_packet_u8(pkt
)
100 /* login must not be zero...internal error if so */
101 || !WPACKET_set_flags(pkt
, WPACKET_FLAGS_NON_ZERO_LENGTH
)
102 || !WPACKET_memcpy(pkt
, s
->srp_ctx
.login
,
103 strlen(s
->srp_ctx
.login
))
104 || !WPACKET_close(pkt
)
105 || !WPACKET_close(pkt
)) {
106 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SRP
,
107 ERR_R_INTERNAL_ERROR
);
108 return EXT_RETURN_FAIL
;
111 return EXT_RETURN_SENT
;
115 #ifndef OPENSSL_NO_EC
116 static int use_ecc(SSL
*s
, int min_version
, int max_version
)
119 unsigned long alg_k
, alg_a
;
120 STACK_OF(SSL_CIPHER
) *cipher_stack
= NULL
;
121 const uint16_t *pgroups
= NULL
;
122 size_t num_groups
, j
;
124 /* See if we support any ECC ciphersuites */
125 if (s
->version
== SSL3_VERSION
)
128 cipher_stack
= SSL_get1_supported_ciphers(s
);
129 end
= sk_SSL_CIPHER_num(cipher_stack
);
130 for (i
= 0; i
< end
; i
++) {
131 const SSL_CIPHER
*c
= sk_SSL_CIPHER_value(cipher_stack
, i
);
133 alg_k
= c
->algorithm_mkey
;
134 alg_a
= c
->algorithm_auth
;
135 if ((alg_k
& (SSL_kECDHE
| SSL_kECDHEPSK
))
136 || (alg_a
& SSL_aECDSA
)
137 || c
->min_tls
>= TLS1_3_VERSION
) {
142 sk_SSL_CIPHER_free(cipher_stack
);
146 /* Check we have at least one EC supported group */
147 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
148 for (j
= 0; j
< num_groups
; j
++) {
149 uint16_t ctmp
= pgroups
[j
];
151 if (tls_valid_group(s
, ctmp
, min_version
, max_version
)
152 && tls_group_allowed(s
, ctmp
, SSL_SECOP_CURVE_SUPPORTED
))
159 EXT_RETURN
tls_construct_ctos_ec_pt_formats(SSL
*s
, WPACKET
*pkt
,
160 unsigned int context
, X509
*x
,
163 const unsigned char *pformats
;
165 int reason
, min_version
, max_version
;
167 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
, NULL
);
169 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
170 SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS
, reason
);
171 return EXT_RETURN_FAIL
;
173 if (!use_ecc(s
, min_version
, max_version
))
174 return EXT_RETURN_NOT_SENT
;
176 /* Add TLS extension ECPointFormats to the ClientHello message */
177 tls1_get_formatlist(s
, &pformats
, &num_formats
);
179 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_ec_point_formats
)
180 /* Sub-packet for formats extension */
181 || !WPACKET_start_sub_packet_u16(pkt
)
182 || !WPACKET_sub_memcpy_u8(pkt
, pformats
, num_formats
)
183 || !WPACKET_close(pkt
)) {
184 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
185 SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
186 return EXT_RETURN_FAIL
;
189 return EXT_RETURN_SENT
;
193 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC)
194 EXT_RETURN
tls_construct_ctos_supported_groups(SSL
*s
, WPACKET
*pkt
,
195 unsigned int context
, X509
*x
,
198 const uint16_t *pgroups
= NULL
;
199 size_t num_groups
= 0, i
;
200 int min_version
, max_version
, reason
;
202 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
, NULL
);
204 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
205 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
, reason
);
206 return EXT_RETURN_FAIL
;
209 #if defined(OPENSSL_NO_EC)
210 if (SSL_IS_DTLS(s
) || max_version
< TLS1_3_VERSION
)
211 return EXT_RETURN_NOT_SENT
;
213 if (!use_ecc(s
, min_version
, max_version
) && max_version
< TLS1_3_VERSION
)
214 return EXT_RETURN_NOT_SENT
;
218 * Add TLS extension supported_groups to the ClientHello message
220 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
222 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_groups
)
223 /* Sub-packet for supported_groups extension */
224 || !WPACKET_start_sub_packet_u16(pkt
)
225 || !WPACKET_start_sub_packet_u16(pkt
)
226 || !WPACKET_set_flags(pkt
, WPACKET_FLAGS_NON_ZERO_LENGTH
)) {
227 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
228 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
229 ERR_R_INTERNAL_ERROR
);
230 return EXT_RETURN_FAIL
;
232 /* Copy group ID if supported */
233 for (i
= 0; i
< num_groups
; i
++) {
234 uint16_t ctmp
= pgroups
[i
];
236 if (tls_valid_group(s
, ctmp
, min_version
, max_version
)
237 && tls_group_allowed(s
, ctmp
, SSL_SECOP_CURVE_SUPPORTED
)) {
238 if (!WPACKET_put_bytes_u16(pkt
, ctmp
)) {
239 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
240 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
241 ERR_R_INTERNAL_ERROR
);
242 return EXT_RETURN_FAIL
;
246 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
247 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
248 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
249 ERR_R_INTERNAL_ERROR
);
250 return EXT_RETURN_FAIL
;
253 return EXT_RETURN_SENT
;
257 EXT_RETURN
tls_construct_ctos_session_ticket(SSL
*s
, WPACKET
*pkt
,
258 unsigned int context
, X509
*x
,
263 if (!tls_use_ticket(s
))
264 return EXT_RETURN_NOT_SENT
;
266 if (!s
->new_session
&& s
->session
!= NULL
267 && s
->session
->ext
.tick
!= NULL
268 && s
->session
->ssl_version
!= TLS1_3_VERSION
) {
269 ticklen
= s
->session
->ext
.ticklen
;
270 } else if (s
->session
&& s
->ext
.session_ticket
!= NULL
271 && s
->ext
.session_ticket
->data
!= NULL
) {
272 ticklen
= s
->ext
.session_ticket
->length
;
273 s
->session
->ext
.tick
= OPENSSL_malloc(ticklen
);
274 if (s
->session
->ext
.tick
== NULL
) {
275 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
276 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
,
277 ERR_R_INTERNAL_ERROR
);
278 return EXT_RETURN_FAIL
;
280 memcpy(s
->session
->ext
.tick
,
281 s
->ext
.session_ticket
->data
, ticklen
);
282 s
->session
->ext
.ticklen
= ticklen
;
287 if (ticklen
== 0 && s
->ext
.session_ticket
!= NULL
&&
288 s
->ext
.session_ticket
->data
== NULL
)
289 return EXT_RETURN_NOT_SENT
;
291 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_session_ticket
)
292 || !WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
, ticklen
)) {
293 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
294 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
, ERR_R_INTERNAL_ERROR
);
295 return EXT_RETURN_FAIL
;
298 return EXT_RETURN_SENT
;
301 EXT_RETURN
tls_construct_ctos_sig_algs(SSL
*s
, WPACKET
*pkt
,
302 unsigned int context
, X509
*x
,
306 const uint16_t *salg
;
308 if (!SSL_CLIENT_USE_SIGALGS(s
))
309 return EXT_RETURN_NOT_SENT
;
311 salglen
= tls12_get_psigalgs(s
, 1, &salg
);
312 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signature_algorithms
)
313 /* Sub-packet for sig-algs extension */
314 || !WPACKET_start_sub_packet_u16(pkt
)
315 /* Sub-packet for the actual list */
316 || !WPACKET_start_sub_packet_u16(pkt
)
317 || !tls12_copy_sigalgs(s
, pkt
, salg
, salglen
)
318 || !WPACKET_close(pkt
)
319 || !WPACKET_close(pkt
)) {
320 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS
,
321 ERR_R_INTERNAL_ERROR
);
322 return EXT_RETURN_FAIL
;
325 return EXT_RETURN_SENT
;
328 #ifndef OPENSSL_NO_OCSP
329 EXT_RETURN
tls_construct_ctos_status_request(SSL
*s
, WPACKET
*pkt
,
330 unsigned int context
, X509
*x
,
335 /* This extension isn't defined for client Certificates */
337 return EXT_RETURN_NOT_SENT
;
339 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
)
340 return EXT_RETURN_NOT_SENT
;
342 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_status_request
)
343 /* Sub-packet for status request extension */
344 || !WPACKET_start_sub_packet_u16(pkt
)
345 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_STATUSTYPE_ocsp
)
346 /* Sub-packet for the ids */
347 || !WPACKET_start_sub_packet_u16(pkt
)) {
348 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
349 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
350 return EXT_RETURN_FAIL
;
352 for (i
= 0; i
< sk_OCSP_RESPID_num(s
->ext
.ocsp
.ids
); i
++) {
353 unsigned char *idbytes
;
354 OCSP_RESPID
*id
= sk_OCSP_RESPID_value(s
->ext
.ocsp
.ids
, i
);
355 int idlen
= i2d_OCSP_RESPID(id
, NULL
);
358 /* Sub-packet for an individual id */
359 || !WPACKET_sub_allocate_bytes_u16(pkt
, idlen
, &idbytes
)
360 || i2d_OCSP_RESPID(id
, &idbytes
) != idlen
) {
361 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
362 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
363 ERR_R_INTERNAL_ERROR
);
364 return EXT_RETURN_FAIL
;
367 if (!WPACKET_close(pkt
)
368 || !WPACKET_start_sub_packet_u16(pkt
)) {
369 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
370 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
371 return EXT_RETURN_FAIL
;
373 if (s
->ext
.ocsp
.exts
) {
374 unsigned char *extbytes
;
375 int extlen
= i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, NULL
);
378 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
379 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
380 ERR_R_INTERNAL_ERROR
);
381 return EXT_RETURN_FAIL
;
383 if (!WPACKET_allocate_bytes(pkt
, extlen
, &extbytes
)
384 || i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, &extbytes
)
386 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
387 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
388 ERR_R_INTERNAL_ERROR
);
389 return EXT_RETURN_FAIL
;
392 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
393 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
394 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
395 return EXT_RETURN_FAIL
;
398 return EXT_RETURN_SENT
;
402 #ifndef OPENSSL_NO_NEXTPROTONEG
403 EXT_RETURN
tls_construct_ctos_npn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
404 X509
*x
, size_t chainidx
)
406 if (s
->ctx
->ext
.npn_select_cb
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
407 return EXT_RETURN_NOT_SENT
;
410 * The client advertises an empty extension to indicate its support
411 * for Next Protocol Negotiation
413 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_next_proto_neg
)
414 || !WPACKET_put_bytes_u16(pkt
, 0)) {
415 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_NPN
,
416 ERR_R_INTERNAL_ERROR
);
417 return EXT_RETURN_FAIL
;
420 return EXT_RETURN_SENT
;
424 EXT_RETURN
tls_construct_ctos_alpn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
425 X509
*x
, size_t chainidx
)
429 if (s
->ext
.alpn
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
430 return EXT_RETURN_NOT_SENT
;
432 if (!WPACKET_put_bytes_u16(pkt
,
433 TLSEXT_TYPE_application_layer_protocol_negotiation
)
434 /* Sub-packet ALPN extension */
435 || !WPACKET_start_sub_packet_u16(pkt
)
436 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.alpn
, s
->ext
.alpn_len
)
437 || !WPACKET_close(pkt
)) {
438 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_ALPN
,
439 ERR_R_INTERNAL_ERROR
);
440 return EXT_RETURN_FAIL
;
444 return EXT_RETURN_SENT
;
448 #ifndef OPENSSL_NO_SRTP
449 EXT_RETURN
tls_construct_ctos_use_srtp(SSL
*s
, WPACKET
*pkt
,
450 unsigned int context
, X509
*x
,
453 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
= SSL_get_srtp_profiles(s
);
457 return EXT_RETURN_NOT_SENT
;
459 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_use_srtp
)
460 /* Sub-packet for SRTP extension */
461 || !WPACKET_start_sub_packet_u16(pkt
)
462 /* Sub-packet for the protection profile list */
463 || !WPACKET_start_sub_packet_u16(pkt
)) {
464 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
,
465 ERR_R_INTERNAL_ERROR
);
466 return EXT_RETURN_FAIL
;
469 end
= sk_SRTP_PROTECTION_PROFILE_num(clnt
);
470 for (i
= 0; i
< end
; i
++) {
471 const SRTP_PROTECTION_PROFILE
*prof
=
472 sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
474 if (prof
== NULL
|| !WPACKET_put_bytes_u16(pkt
, prof
->id
)) {
475 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
476 SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
, ERR_R_INTERNAL_ERROR
);
477 return EXT_RETURN_FAIL
;
480 if (!WPACKET_close(pkt
)
481 /* Add an empty use_mki value */
482 || !WPACKET_put_bytes_u8(pkt
, 0)
483 || !WPACKET_close(pkt
)) {
484 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
,
485 ERR_R_INTERNAL_ERROR
);
486 return EXT_RETURN_FAIL
;
489 return EXT_RETURN_SENT
;
493 EXT_RETURN
tls_construct_ctos_etm(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
494 X509
*x
, size_t chainidx
)
496 if (s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
497 return EXT_RETURN_NOT_SENT
;
499 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_encrypt_then_mac
)
500 || !WPACKET_put_bytes_u16(pkt
, 0)) {
501 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_ETM
,
502 ERR_R_INTERNAL_ERROR
);
503 return EXT_RETURN_FAIL
;
506 return EXT_RETURN_SENT
;
509 #ifndef OPENSSL_NO_CT
510 EXT_RETURN
tls_construct_ctos_sct(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
511 X509
*x
, size_t chainidx
)
513 if (s
->ct_validation_callback
== NULL
)
514 return EXT_RETURN_NOT_SENT
;
516 /* Not defined for client Certificates */
518 return EXT_RETURN_NOT_SENT
;
520 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signed_certificate_timestamp
)
521 || !WPACKET_put_bytes_u16(pkt
, 0)) {
522 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SCT
,
523 ERR_R_INTERNAL_ERROR
);
524 return EXT_RETURN_FAIL
;
527 return EXT_RETURN_SENT
;
531 EXT_RETURN
tls_construct_ctos_ems(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
532 X509
*x
, size_t chainidx
)
534 if (s
->options
& SSL_OP_NO_EXTENDED_MASTER_SECRET
)
535 return EXT_RETURN_NOT_SENT
;
537 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_extended_master_secret
)
538 || !WPACKET_put_bytes_u16(pkt
, 0)) {
539 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EMS
,
540 ERR_R_INTERNAL_ERROR
);
541 return EXT_RETURN_FAIL
;
544 return EXT_RETURN_SENT
;
547 EXT_RETURN
tls_construct_ctos_supported_versions(SSL
*s
, WPACKET
*pkt
,
548 unsigned int context
, X509
*x
,
551 int currv
, min_version
, max_version
, reason
;
553 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
, NULL
);
555 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
556 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
, reason
);
557 return EXT_RETURN_FAIL
;
561 * Don't include this if we can't negotiate TLSv1.3. We can do a straight
562 * comparison here because we will never be called in DTLS.
564 if (max_version
< TLS1_3_VERSION
)
565 return EXT_RETURN_NOT_SENT
;
567 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_versions
)
568 || !WPACKET_start_sub_packet_u16(pkt
)
569 || !WPACKET_start_sub_packet_u8(pkt
)) {
570 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
571 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
572 ERR_R_INTERNAL_ERROR
);
573 return EXT_RETURN_FAIL
;
576 for (currv
= max_version
; currv
>= min_version
; currv
--) {
577 if (!WPACKET_put_bytes_u16(pkt
, currv
)) {
578 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
579 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
580 ERR_R_INTERNAL_ERROR
);
581 return EXT_RETURN_FAIL
;
584 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
585 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
586 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
587 ERR_R_INTERNAL_ERROR
);
588 return EXT_RETURN_FAIL
;
591 return EXT_RETURN_SENT
;
595 * Construct a psk_kex_modes extension.
597 EXT_RETURN
tls_construct_ctos_psk_kex_modes(SSL
*s
, WPACKET
*pkt
,
598 unsigned int context
, X509
*x
,
601 #ifndef OPENSSL_NO_TLS1_3
602 int nodhe
= s
->options
& SSL_OP_ALLOW_NO_DHE_KEX
;
604 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk_kex_modes
)
605 || !WPACKET_start_sub_packet_u16(pkt
)
606 || !WPACKET_start_sub_packet_u8(pkt
)
607 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE_DHE
)
608 || (nodhe
&& !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE
))
609 || !WPACKET_close(pkt
)
610 || !WPACKET_close(pkt
)) {
611 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
612 SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES
, ERR_R_INTERNAL_ERROR
);
613 return EXT_RETURN_FAIL
;
616 s
->ext
.psk_kex_mode
= TLSEXT_KEX_MODE_FLAG_KE_DHE
;
618 s
->ext
.psk_kex_mode
|= TLSEXT_KEX_MODE_FLAG_KE
;
621 return EXT_RETURN_SENT
;
624 #ifndef OPENSSL_NO_TLS1_3
625 static int add_key_share(SSL
*s
, WPACKET
*pkt
, unsigned int curve_id
)
627 unsigned char *encoded_point
= NULL
;
628 EVP_PKEY
*key_share_key
= NULL
;
631 if (s
->s3
.tmp
.pkey
!= NULL
) {
632 if (!ossl_assert(s
->hello_retry_request
== SSL_HRR_PENDING
)) {
633 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
,
634 ERR_R_INTERNAL_ERROR
);
638 * Could happen if we got an HRR that wasn't requesting a new key_share
640 key_share_key
= s
->s3
.tmp
.pkey
;
642 key_share_key
= ssl_generate_pkey_group(s
, curve_id
);
643 if (key_share_key
== NULL
) {
644 /* SSLfatal() already called */
649 /* Encode the public key. */
650 encodedlen
= EVP_PKEY_get1_encoded_public_key(key_share_key
,
652 if (encodedlen
== 0) {
653 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
, ERR_R_EC_LIB
);
657 /* Create KeyShareEntry */
658 if (!WPACKET_put_bytes_u16(pkt
, curve_id
)
659 || !WPACKET_sub_memcpy_u16(pkt
, encoded_point
, encodedlen
)) {
660 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
,
661 ERR_R_INTERNAL_ERROR
);
666 * TODO(TLS1.3): When changing to send more than one key_share we're
667 * going to need to be able to save more than one EVP_PKEY. For now
668 * we reuse the existing tmp.pkey
670 s
->s3
.tmp
.pkey
= key_share_key
;
671 s
->s3
.group_id
= curve_id
;
672 OPENSSL_free(encoded_point
);
676 if (s
->s3
.tmp
.pkey
== NULL
)
677 EVP_PKEY_free(key_share_key
);
678 OPENSSL_free(encoded_point
);
683 EXT_RETURN
tls_construct_ctos_key_share(SSL
*s
, WPACKET
*pkt
,
684 unsigned int context
, X509
*x
,
687 #ifndef OPENSSL_NO_TLS1_3
688 size_t i
, num_groups
= 0;
689 const uint16_t *pgroups
= NULL
;
690 uint16_t curve_id
= 0;
692 /* key_share extension */
693 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_key_share
)
694 /* Extension data sub-packet */
695 || !WPACKET_start_sub_packet_u16(pkt
)
696 /* KeyShare list sub-packet */
697 || !WPACKET_start_sub_packet_u16(pkt
)) {
698 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
699 ERR_R_INTERNAL_ERROR
);
700 return EXT_RETURN_FAIL
;
703 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
706 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
709 if (s
->s3
.group_id
!= 0) {
710 curve_id
= s
->s3
.group_id
;
712 for (i
= 0; i
< num_groups
; i
++) {
714 if (!tls_group_allowed(s
, pgroups
[i
], SSL_SECOP_CURVE_SUPPORTED
))
717 curve_id
= pgroups
[i
];
723 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
724 SSL_R_NO_SUITABLE_KEY_SHARE
);
725 return EXT_RETURN_FAIL
;
728 if (!add_key_share(s
, pkt
, curve_id
)) {
729 /* SSLfatal() already called */
730 return EXT_RETURN_FAIL
;
733 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
734 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
735 ERR_R_INTERNAL_ERROR
);
736 return EXT_RETURN_FAIL
;
738 return EXT_RETURN_SENT
;
740 return EXT_RETURN_NOT_SENT
;
744 EXT_RETURN
tls_construct_ctos_cookie(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
745 X509
*x
, size_t chainidx
)
747 EXT_RETURN ret
= EXT_RETURN_FAIL
;
749 /* Should only be set if we've had an HRR */
750 if (s
->ext
.tls13_cookie_len
== 0)
751 return EXT_RETURN_NOT_SENT
;
753 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_cookie
)
754 /* Extension data sub-packet */
755 || !WPACKET_start_sub_packet_u16(pkt
)
756 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.tls13_cookie
,
757 s
->ext
.tls13_cookie_len
)
758 || !WPACKET_close(pkt
)) {
759 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_COOKIE
,
760 ERR_R_INTERNAL_ERROR
);
764 ret
= EXT_RETURN_SENT
;
766 OPENSSL_free(s
->ext
.tls13_cookie
);
767 s
->ext
.tls13_cookie
= NULL
;
768 s
->ext
.tls13_cookie_len
= 0;
773 EXT_RETURN
tls_construct_ctos_early_data(SSL
*s
, WPACKET
*pkt
,
774 unsigned int context
, X509
*x
,
777 #ifndef OPENSSL_NO_PSK
778 char identity
[PSK_MAX_IDENTITY_LEN
+ 1];
779 #endif /* OPENSSL_NO_PSK */
780 const unsigned char *id
= NULL
;
782 SSL_SESSION
*psksess
= NULL
;
783 SSL_SESSION
*edsess
= NULL
;
784 const EVP_MD
*handmd
= NULL
;
786 if (s
->hello_retry_request
== SSL_HRR_PENDING
)
787 handmd
= ssl_handshake_md(s
);
789 if (s
->psk_use_session_cb
!= NULL
790 && (!s
->psk_use_session_cb(s
, handmd
, &id
, &idlen
, &psksess
)
792 && psksess
->ssl_version
!= TLS1_3_VERSION
))) {
793 SSL_SESSION_free(psksess
);
794 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
796 return EXT_RETURN_FAIL
;
799 #ifndef OPENSSL_NO_PSK
800 if (psksess
== NULL
&& s
->psk_client_callback
!= NULL
) {
801 unsigned char psk
[PSK_MAX_PSK_LEN
];
804 memset(identity
, 0, sizeof(identity
));
805 psklen
= s
->psk_client_callback(s
, NULL
, identity
, sizeof(identity
) - 1,
808 if (psklen
> PSK_MAX_PSK_LEN
) {
809 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
,
810 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
811 return EXT_RETURN_FAIL
;
812 } else if (psklen
> 0) {
813 const unsigned char tls13_aes128gcmsha256_id
[] = { 0x13, 0x01 };
814 const SSL_CIPHER
*cipher
;
816 idlen
= strlen(identity
);
817 if (idlen
> PSK_MAX_IDENTITY_LEN
) {
818 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
819 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
820 ERR_R_INTERNAL_ERROR
);
821 return EXT_RETURN_FAIL
;
823 id
= (unsigned char *)identity
;
826 * We found a PSK using an old style callback. We don't know
827 * the digest so we default to SHA256 as per the TLSv1.3 spec
829 cipher
= SSL_CIPHER_find(s
, tls13_aes128gcmsha256_id
);
830 if (cipher
== NULL
) {
831 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
832 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
833 ERR_R_INTERNAL_ERROR
);
834 return EXT_RETURN_FAIL
;
837 psksess
= SSL_SESSION_new();
839 || !SSL_SESSION_set1_master_key(psksess
, psk
, psklen
)
840 || !SSL_SESSION_set_cipher(psksess
, cipher
)
841 || !SSL_SESSION_set_protocol_version(psksess
, TLS1_3_VERSION
)) {
842 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
843 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
844 ERR_R_INTERNAL_ERROR
);
845 OPENSSL_cleanse(psk
, psklen
);
846 return EXT_RETURN_FAIL
;
848 OPENSSL_cleanse(psk
, psklen
);
851 #endif /* OPENSSL_NO_PSK */
853 SSL_SESSION_free(s
->psksession
);
854 s
->psksession
= psksess
;
855 if (psksess
!= NULL
) {
856 OPENSSL_free(s
->psksession_id
);
857 s
->psksession_id
= OPENSSL_memdup(id
, idlen
);
858 if (s
->psksession_id
== NULL
) {
859 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
860 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
861 return EXT_RETURN_FAIL
;
863 s
->psksession_id_len
= idlen
;
866 if (s
->early_data_state
!= SSL_EARLY_DATA_CONNECTING
867 || (s
->session
->ext
.max_early_data
== 0
868 && (psksess
== NULL
|| psksess
->ext
.max_early_data
== 0))) {
869 s
->max_early_data
= 0;
870 return EXT_RETURN_NOT_SENT
;
872 edsess
= s
->session
->ext
.max_early_data
!= 0 ? s
->session
: psksess
;
873 s
->max_early_data
= edsess
->ext
.max_early_data
;
875 if (edsess
->ext
.hostname
!= NULL
) {
876 if (s
->ext
.hostname
== NULL
877 || (s
->ext
.hostname
!= NULL
878 && strcmp(s
->ext
.hostname
, edsess
->ext
.hostname
) != 0)) {
879 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
880 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
881 SSL_R_INCONSISTENT_EARLY_DATA_SNI
);
882 return EXT_RETURN_FAIL
;
886 if ((s
->ext
.alpn
== NULL
&& edsess
->ext
.alpn_selected
!= NULL
)) {
887 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
888 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
889 return EXT_RETURN_FAIL
;
893 * Verify that we are offering an ALPN protocol consistent with the early
896 if (edsess
->ext
.alpn_selected
!= NULL
) {
897 PACKET prots
, alpnpkt
;
900 if (!PACKET_buf_init(&prots
, s
->ext
.alpn
, s
->ext
.alpn_len
)) {
901 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
902 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
903 return EXT_RETURN_FAIL
;
905 while (PACKET_get_length_prefixed_1(&prots
, &alpnpkt
)) {
906 if (PACKET_equal(&alpnpkt
, edsess
->ext
.alpn_selected
,
907 edsess
->ext
.alpn_selected_len
)) {
913 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
914 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
915 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
916 return EXT_RETURN_FAIL
;
920 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_early_data
)
921 || !WPACKET_start_sub_packet_u16(pkt
)
922 || !WPACKET_close(pkt
)) {
923 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
924 ERR_R_INTERNAL_ERROR
);
925 return EXT_RETURN_FAIL
;
929 * We set this to rejected here. Later, if the server acknowledges the
930 * extension, we set it to accepted.
932 s
->ext
.early_data
= SSL_EARLY_DATA_REJECTED
;
933 s
->ext
.early_data_ok
= 1;
935 return EXT_RETURN_SENT
;
938 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
939 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
942 * PSK pre binder overhead =
943 * 2 bytes for TLSEXT_TYPE_psk
944 * 2 bytes for extension length
945 * 2 bytes for identities list length
946 * 2 bytes for identity length
947 * 4 bytes for obfuscated_ticket_age
948 * 2 bytes for binder list length
949 * 1 byte for binder length
950 * The above excludes the number of bytes for the identity itself and the
951 * subsequent binder bytes
953 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
955 EXT_RETURN
tls_construct_ctos_padding(SSL
*s
, WPACKET
*pkt
,
956 unsigned int context
, X509
*x
,
959 unsigned char *padbytes
;
962 if ((s
->options
& SSL_OP_TLSEXT_PADDING
) == 0)
963 return EXT_RETURN_NOT_SENT
;
966 * Add padding to workaround bugs in F5 terminators. See RFC7685.
967 * This code calculates the length of all extensions added so far but
968 * excludes the PSK extension (because that MUST be written last). Therefore
969 * this extension MUST always appear second to last.
971 if (!WPACKET_get_total_written(pkt
, &hlen
)) {
972 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PADDING
,
973 ERR_R_INTERNAL_ERROR
);
974 return EXT_RETURN_FAIL
;
978 * If we're going to send a PSK then that will be written out after this
979 * extension, so we need to calculate how long it is going to be.
981 if (s
->session
->ssl_version
== TLS1_3_VERSION
982 && s
->session
->ext
.ticklen
!= 0
983 && s
->session
->cipher
!= NULL
) {
984 const EVP_MD
*md
= ssl_md(s
->ctx
, s
->session
->cipher
->algorithm2
);
988 * Add the fixed PSK overhead, the identity length and the binder
991 hlen
+= PSK_PRE_BINDER_OVERHEAD
+ s
->session
->ext
.ticklen
996 if (hlen
> F5_WORKAROUND_MIN_MSG_LEN
&& hlen
< F5_WORKAROUND_MAX_MSG_LEN
) {
997 /* Calculate the amount of padding we need to add */
998 hlen
= F5_WORKAROUND_MAX_MSG_LEN
- hlen
;
1001 * Take off the size of extension header itself (2 bytes for type and
1002 * 2 bytes for length bytes), but ensure that the extension is at least
1003 * 1 byte long so as not to have an empty extension last (WebSphere 7.x,
1004 * 8.x are intolerant of that condition)
1011 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_padding
)
1012 || !WPACKET_sub_allocate_bytes_u16(pkt
, hlen
, &padbytes
)) {
1013 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PADDING
,
1014 ERR_R_INTERNAL_ERROR
);
1015 return EXT_RETURN_FAIL
;
1017 memset(padbytes
, 0, hlen
);
1020 return EXT_RETURN_SENT
;
1024 * Construct the pre_shared_key extension
1026 EXT_RETURN
tls_construct_ctos_psk(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
1027 X509
*x
, size_t chainidx
)
1029 #ifndef OPENSSL_NO_TLS1_3
1030 uint32_t now
, agesec
, agems
= 0;
1031 size_t reshashsize
= 0, pskhashsize
= 0, binderoffset
, msglen
;
1032 unsigned char *resbinder
= NULL
, *pskbinder
= NULL
, *msgstart
= NULL
;
1033 const EVP_MD
*handmd
= NULL
, *mdres
= NULL
, *mdpsk
= NULL
;
1036 s
->ext
.tick_identity
= 0;
1039 * Note: At this stage of the code we only support adding a single
1040 * resumption PSK. If we add support for multiple PSKs then the length
1041 * calculations in the padding extension will need to be adjusted.
1045 * If this is an incompatible or new session then we have nothing to resume
1046 * so don't add this extension.
1048 if (s
->session
->ssl_version
!= TLS1_3_VERSION
1049 || (s
->session
->ext
.ticklen
== 0 && s
->psksession
== NULL
))
1050 return EXT_RETURN_NOT_SENT
;
1052 if (s
->hello_retry_request
== SSL_HRR_PENDING
)
1053 handmd
= ssl_handshake_md(s
);
1055 if (s
->session
->ext
.ticklen
!= 0) {
1056 /* Get the digest associated with the ciphersuite in the session */
1057 if (s
->session
->cipher
== NULL
) {
1058 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1059 ERR_R_INTERNAL_ERROR
);
1060 return EXT_RETURN_FAIL
;
1062 mdres
= ssl_md(s
->ctx
, s
->session
->cipher
->algorithm2
);
1063 if (mdres
== NULL
) {
1065 * Don't recognize this cipher so we can't use the session.
1071 if (s
->hello_retry_request
== SSL_HRR_PENDING
&& mdres
!= handmd
) {
1073 * Selected ciphersuite hash does not match the hash for the session
1074 * so we can't use it.
1080 * Technically the C standard just says time() returns a time_t and says
1081 * nothing about the encoding of that type. In practice most
1082 * implementations follow POSIX which holds it as an integral type in
1083 * seconds since epoch. We've already made the assumption that we can do
1084 * this in multiple places in the code, so portability shouldn't be an
1087 now
= (uint32_t)time(NULL
);
1088 agesec
= now
- (uint32_t)s
->session
->time
;
1090 * We calculate the age in seconds but the server may work in ms. Due to
1091 * rounding errors we could overestimate the age by up to 1s. It is
1092 * better to underestimate it. Otherwise, if the RTT is very short, when
1093 * the server calculates the age reported by the client it could be
1094 * bigger than the age calculated on the server - which should never
1100 if (s
->session
->ext
.tick_lifetime_hint
< agesec
) {
1101 /* Ticket is too old. Ignore it. */
1106 * Calculate age in ms. We're just doing it to nearest second. Should be
1109 agems
= agesec
* (uint32_t)1000;
1111 if (agesec
!= 0 && agems
/ (uint32_t)1000 != agesec
) {
1113 * Overflow. Shouldn't happen unless this is a *really* old session.
1114 * If so we just ignore it.
1120 * Obfuscate the age. Overflow here is fine, this addition is supposed
1123 agems
+= s
->session
->ext
.tick_age_add
;
1125 reshashsize
= EVP_MD_size(mdres
);
1126 s
->ext
.tick_identity
++;
1131 if (!dores
&& s
->psksession
== NULL
)
1132 return EXT_RETURN_NOT_SENT
;
1134 if (s
->psksession
!= NULL
) {
1135 mdpsk
= ssl_md(s
->ctx
, s
->psksession
->cipher
->algorithm2
);
1136 if (mdpsk
== NULL
) {
1138 * Don't recognize this cipher so we can't use the session.
1139 * If this happens it's an application bug.
1141 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1143 return EXT_RETURN_FAIL
;
1146 if (s
->hello_retry_request
== SSL_HRR_PENDING
&& mdpsk
!= handmd
) {
1148 * Selected ciphersuite hash does not match the hash for the PSK
1149 * session. This is an application bug.
1151 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1153 return EXT_RETURN_FAIL
;
1156 pskhashsize
= EVP_MD_size(mdpsk
);
1159 /* Create the extension, but skip over the binder for now */
1160 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk
)
1161 || !WPACKET_start_sub_packet_u16(pkt
)
1162 || !WPACKET_start_sub_packet_u16(pkt
)) {
1163 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1164 ERR_R_INTERNAL_ERROR
);
1165 return EXT_RETURN_FAIL
;
1169 if (!WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
,
1170 s
->session
->ext
.ticklen
)
1171 || !WPACKET_put_bytes_u32(pkt
, agems
)) {
1172 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1173 ERR_R_INTERNAL_ERROR
);
1174 return EXT_RETURN_FAIL
;
1178 if (s
->psksession
!= NULL
) {
1179 if (!WPACKET_sub_memcpy_u16(pkt
, s
->psksession_id
,
1180 s
->psksession_id_len
)
1181 || !WPACKET_put_bytes_u32(pkt
, 0)) {
1182 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1183 ERR_R_INTERNAL_ERROR
);
1184 return EXT_RETURN_FAIL
;
1186 s
->ext
.tick_identity
++;
1189 if (!WPACKET_close(pkt
)
1190 || !WPACKET_get_total_written(pkt
, &binderoffset
)
1191 || !WPACKET_start_sub_packet_u16(pkt
)
1193 && !WPACKET_sub_allocate_bytes_u8(pkt
, reshashsize
, &resbinder
))
1194 || (s
->psksession
!= NULL
1195 && !WPACKET_sub_allocate_bytes_u8(pkt
, pskhashsize
, &pskbinder
))
1196 || !WPACKET_close(pkt
)
1197 || !WPACKET_close(pkt
)
1198 || !WPACKET_get_total_written(pkt
, &msglen
)
1200 * We need to fill in all the sub-packet lengths now so we can
1201 * calculate the HMAC of the message up to the binders
1203 || !WPACKET_fill_lengths(pkt
)) {
1204 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1205 ERR_R_INTERNAL_ERROR
);
1206 return EXT_RETURN_FAIL
;
1209 msgstart
= WPACKET_get_curr(pkt
) - msglen
;
1212 && tls_psk_do_binder(s
, mdres
, msgstart
, binderoffset
, NULL
,
1213 resbinder
, s
->session
, 1, 0) != 1) {
1214 /* SSLfatal() already called */
1215 return EXT_RETURN_FAIL
;
1218 if (s
->psksession
!= NULL
1219 && tls_psk_do_binder(s
, mdpsk
, msgstart
, binderoffset
, NULL
,
1220 pskbinder
, s
->psksession
, 1, 1) != 1) {
1221 /* SSLfatal() already called */
1222 return EXT_RETURN_FAIL
;
1225 return EXT_RETURN_SENT
;
1227 return EXT_RETURN_NOT_SENT
;
1231 EXT_RETURN
tls_construct_ctos_post_handshake_auth(SSL
*s
, WPACKET
*pkt
,
1232 unsigned int context
,
1233 X509
*x
, size_t chainidx
)
1235 #ifndef OPENSSL_NO_TLS1_3
1236 if (!s
->pha_enabled
)
1237 return EXT_RETURN_NOT_SENT
;
1239 /* construct extension - 0 length, no contents */
1240 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_post_handshake_auth
)
1241 || !WPACKET_start_sub_packet_u16(pkt
)
1242 || !WPACKET_close(pkt
)) {
1243 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1244 SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH
,
1245 ERR_R_INTERNAL_ERROR
);
1246 return EXT_RETURN_FAIL
;
1249 s
->post_handshake_auth
= SSL_PHA_EXT_SENT
;
1251 return EXT_RETURN_SENT
;
1253 return EXT_RETURN_NOT_SENT
;
1259 * Parse the server's renegotiation binding and abort if it's not right
1261 int tls_parse_stoc_renegotiate(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1262 X509
*x
, size_t chainidx
)
1264 size_t expected_len
= s
->s3
.previous_client_finished_len
1265 + s
->s3
.previous_server_finished_len
;
1267 const unsigned char *data
;
1269 /* Check for logic errors */
1270 if (!ossl_assert(expected_len
== 0
1271 || s
->s3
.previous_client_finished_len
!= 0)
1272 || !ossl_assert(expected_len
== 0
1273 || s
->s3
.previous_server_finished_len
!= 0)) {
1274 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1275 ERR_R_INTERNAL_ERROR
);
1279 /* Parse the length byte */
1280 if (!PACKET_get_1_len(pkt
, &ilen
)) {
1281 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1282 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1286 /* Consistency check */
1287 if (PACKET_remaining(pkt
) != ilen
) {
1288 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1289 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1293 /* Check that the extension matches */
1294 if (ilen
!= expected_len
) {
1295 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1296 SSL_R_RENEGOTIATION_MISMATCH
);
1300 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
.previous_client_finished_len
)
1301 || memcmp(data
, s
->s3
.previous_client_finished
,
1302 s
->s3
.previous_client_finished_len
) != 0) {
1303 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1304 SSL_R_RENEGOTIATION_MISMATCH
);
1308 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
.previous_server_finished_len
)
1309 || memcmp(data
, s
->s3
.previous_server_finished
,
1310 s
->s3
.previous_server_finished_len
) != 0) {
1311 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1312 SSL_R_RENEGOTIATION_MISMATCH
);
1315 s
->s3
.send_connection_binding
= 1;
1320 /* Parse the server's max fragment len extension packet */
1321 int tls_parse_stoc_maxfragmentlen(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1322 X509
*x
, size_t chainidx
)
1326 if (PACKET_remaining(pkt
) != 1 || !PACKET_get_1(pkt
, &value
)) {
1327 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1328 SSL_R_BAD_EXTENSION
);
1332 /* |value| should contains a valid max-fragment-length code. */
1333 if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value
)) {
1334 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1335 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1336 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH
);
1340 /* Must be the same value as client-configured one who was sent to server */
1342 * RFC 6066: if a client receives a maximum fragment length negotiation
1343 * response that differs from the length it requested, ...
1344 * It must abort with SSL_AD_ILLEGAL_PARAMETER alert
1346 if (value
!= s
->ext
.max_fragment_len_mode
) {
1347 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1348 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1349 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH
);
1354 * Maximum Fragment Length Negotiation succeeded.
1355 * The negotiated Maximum Fragment Length is binding now.
1357 s
->session
->ext
.max_fragment_len_mode
= value
;
1362 int tls_parse_stoc_server_name(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1363 X509
*x
, size_t chainidx
)
1365 if (s
->ext
.hostname
== NULL
) {
1366 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1367 ERR_R_INTERNAL_ERROR
);
1371 if (PACKET_remaining(pkt
) > 0) {
1372 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1373 SSL_R_BAD_EXTENSION
);
1378 if (s
->session
->ext
.hostname
!= NULL
) {
1379 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1380 ERR_R_INTERNAL_ERROR
);
1383 s
->session
->ext
.hostname
= OPENSSL_strdup(s
->ext
.hostname
);
1384 if (s
->session
->ext
.hostname
== NULL
) {
1385 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1386 ERR_R_INTERNAL_ERROR
);
1394 #ifndef OPENSSL_NO_EC
1395 int tls_parse_stoc_ec_pt_formats(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1396 X509
*x
, size_t chainidx
)
1398 size_t ecpointformats_len
;
1399 PACKET ecptformatlist
;
1401 if (!PACKET_as_length_prefixed_1(pkt
, &ecptformatlist
)) {
1402 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
,
1403 SSL_R_BAD_EXTENSION
);
1407 ecpointformats_len
= PACKET_remaining(&ecptformatlist
);
1408 if (ecpointformats_len
== 0) {
1409 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1410 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, SSL_R_BAD_LENGTH
);
1414 s
->ext
.peer_ecpointformats_len
= 0;
1415 OPENSSL_free(s
->ext
.peer_ecpointformats
);
1416 s
->ext
.peer_ecpointformats
= OPENSSL_malloc(ecpointformats_len
);
1417 if (s
->ext
.peer_ecpointformats
== NULL
) {
1418 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1419 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
1423 s
->ext
.peer_ecpointformats_len
= ecpointformats_len
;
1425 if (!PACKET_copy_bytes(&ecptformatlist
,
1426 s
->ext
.peer_ecpointformats
,
1427 ecpointformats_len
)) {
1428 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1429 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
1438 int tls_parse_stoc_session_ticket(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1439 X509
*x
, size_t chainidx
)
1441 if (s
->ext
.session_ticket_cb
!= NULL
&&
1442 !s
->ext
.session_ticket_cb(s
, PACKET_data(pkt
),
1443 PACKET_remaining(pkt
),
1444 s
->ext
.session_ticket_cb_arg
)) {
1445 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
,
1446 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1450 if (!tls_use_ticket(s
)) {
1451 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
,
1452 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1455 if (PACKET_remaining(pkt
) > 0) {
1456 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1457 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1461 s
->ext
.ticket_expected
= 1;
1466 #ifndef OPENSSL_NO_OCSP
1467 int tls_parse_stoc_status_request(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1468 X509
*x
, size_t chainidx
)
1470 if (context
== SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
) {
1471 /* We ignore this if the server sends a CertificateRequest */
1472 /* TODO(TLS1.3): Add support for this */
1477 * MUST only be sent if we've requested a status
1478 * request message. In TLS <= 1.2 it must also be empty.
1480 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
) {
1481 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
,
1482 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST
, SSL_R_BAD_EXTENSION
);
1485 if (!SSL_IS_TLS13(s
) && PACKET_remaining(pkt
) > 0) {
1486 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1487 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST
, SSL_R_BAD_EXTENSION
);
1491 if (SSL_IS_TLS13(s
)) {
1492 /* We only know how to handle this if it's for the first Certificate in
1493 * the chain. We ignore any other responses.
1498 /* SSLfatal() already called */
1499 return tls_process_cert_status_body(s
, pkt
);
1502 /* Set flag to expect CertificateStatus message */
1503 s
->ext
.status_expected
= 1;
1510 #ifndef OPENSSL_NO_CT
1511 int tls_parse_stoc_sct(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1514 if (context
== SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
) {
1515 /* We ignore this if the server sends it in a CertificateRequest */
1516 /* TODO(TLS1.3): Add support for this */
1521 * Only take it if we asked for it - i.e if there is no CT validation
1522 * callback set, then a custom extension MAY be processing it, so we
1523 * need to let control continue to flow to that.
1525 if (s
->ct_validation_callback
!= NULL
) {
1526 size_t size
= PACKET_remaining(pkt
);
1528 /* Simply copy it off for later processing */
1529 OPENSSL_free(s
->ext
.scts
);
1532 s
->ext
.scts_len
= (uint16_t)size
;
1534 s
->ext
.scts
= OPENSSL_malloc(size
);
1535 if (s
->ext
.scts
== NULL
1536 || !PACKET_copy_bytes(pkt
, s
->ext
.scts
, size
)) {
1537 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SCT
,
1538 ERR_R_INTERNAL_ERROR
);
1543 ENDPOINT role
= (context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0
1544 ? ENDPOINT_CLIENT
: ENDPOINT_BOTH
;
1547 * If we didn't ask for it then there must be a custom extension,
1548 * otherwise this is unsolicited.
1550 if (custom_ext_find(&s
->cert
->custext
, role
,
1551 TLSEXT_TYPE_signed_certificate_timestamp
,
1553 SSLfatal(s
, TLS1_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_SCT
,
1554 SSL_R_BAD_EXTENSION
);
1558 if (!custom_ext_parse(s
, context
,
1559 TLSEXT_TYPE_signed_certificate_timestamp
,
1560 PACKET_data(pkt
), PACKET_remaining(pkt
),
1562 /* SSLfatal already called */
1572 #ifndef OPENSSL_NO_NEXTPROTONEG
1574 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1575 * elements of zero length are allowed and the set of elements must exactly
1576 * fill the length of the block. Returns 1 on success or 0 on failure.
1578 static int ssl_next_proto_validate(SSL
*s
, PACKET
*pkt
)
1580 PACKET tmp_protocol
;
1582 while (PACKET_remaining(pkt
)) {
1583 if (!PACKET_get_length_prefixed_1(pkt
, &tmp_protocol
)
1584 || PACKET_remaining(&tmp_protocol
) == 0) {
1585 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_SSL_NEXT_PROTO_VALIDATE
,
1586 SSL_R_BAD_EXTENSION
);
1594 int tls_parse_stoc_npn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1597 unsigned char *selected
;
1598 unsigned char selected_len
;
1601 /* Check if we are in a renegotiation. If so ignore this extension */
1602 if (!SSL_IS_FIRST_HANDSHAKE(s
))
1605 /* We must have requested it. */
1606 if (s
->ctx
->ext
.npn_select_cb
== NULL
) {
1607 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_NPN
,
1608 SSL_R_BAD_EXTENSION
);
1612 /* The data must be valid */
1614 if (!ssl_next_proto_validate(s
, &tmppkt
)) {
1615 /* SSLfatal() already called */
1618 if (s
->ctx
->ext
.npn_select_cb(s
, &selected
, &selected_len
,
1620 PACKET_remaining(pkt
),
1621 s
->ctx
->ext
.npn_select_cb_arg
) !=
1622 SSL_TLSEXT_ERR_OK
) {
1623 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
, SSL_F_TLS_PARSE_STOC_NPN
,
1624 SSL_R_BAD_EXTENSION
);
1629 * Could be non-NULL if server has sent multiple NPN extensions in
1630 * a single Serverhello
1632 OPENSSL_free(s
->ext
.npn
);
1633 s
->ext
.npn
= OPENSSL_malloc(selected_len
);
1634 if (s
->ext
.npn
== NULL
) {
1635 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_NPN
,
1636 ERR_R_INTERNAL_ERROR
);
1640 memcpy(s
->ext
.npn
, selected
, selected_len
);
1641 s
->ext
.npn_len
= selected_len
;
1648 int tls_parse_stoc_alpn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1653 /* We must have requested it. */
1654 if (!s
->s3
.alpn_sent
) {
1655 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_ALPN
,
1656 SSL_R_BAD_EXTENSION
);
1660 * The extension data consists of:
1661 * uint16 list_length
1662 * uint8 proto_length;
1663 * uint8 proto[proto_length];
1665 if (!PACKET_get_net_2_len(pkt
, &len
)
1666 || PACKET_remaining(pkt
) != len
|| !PACKET_get_1_len(pkt
, &len
)
1667 || PACKET_remaining(pkt
) != len
) {
1668 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1669 SSL_R_BAD_EXTENSION
);
1672 OPENSSL_free(s
->s3
.alpn_selected
);
1673 s
->s3
.alpn_selected
= OPENSSL_malloc(len
);
1674 if (s
->s3
.alpn_selected
== NULL
) {
1675 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1676 ERR_R_INTERNAL_ERROR
);
1679 if (!PACKET_copy_bytes(pkt
, s
->s3
.alpn_selected
, len
)) {
1680 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1681 SSL_R_BAD_EXTENSION
);
1684 s
->s3
.alpn_selected_len
= len
;
1686 if (s
->session
->ext
.alpn_selected
== NULL
1687 || s
->session
->ext
.alpn_selected_len
!= len
1688 || memcmp(s
->session
->ext
.alpn_selected
, s
->s3
.alpn_selected
, len
)
1690 /* ALPN not consistent with the old session so cannot use early_data */
1691 s
->ext
.early_data_ok
= 0;
1695 * This is a new session and so alpn_selected should have been
1696 * initialised to NULL. We should update it with the selected ALPN.
1698 if (!ossl_assert(s
->session
->ext
.alpn_selected
== NULL
)) {
1699 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1700 ERR_R_INTERNAL_ERROR
);
1703 s
->session
->ext
.alpn_selected
=
1704 OPENSSL_memdup(s
->s3
.alpn_selected
, s
->s3
.alpn_selected_len
);
1705 if (s
->session
->ext
.alpn_selected
== NULL
) {
1706 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1707 ERR_R_INTERNAL_ERROR
);
1710 s
->session
->ext
.alpn_selected_len
= s
->s3
.alpn_selected_len
;
1716 #ifndef OPENSSL_NO_SRTP
1717 int tls_parse_stoc_use_srtp(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1720 unsigned int id
, ct
, mki
;
1722 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
;
1723 SRTP_PROTECTION_PROFILE
*prof
;
1725 if (!PACKET_get_net_2(pkt
, &ct
) || ct
!= 2
1726 || !PACKET_get_net_2(pkt
, &id
)
1727 || !PACKET_get_1(pkt
, &mki
)
1728 || PACKET_remaining(pkt
) != 0) {
1729 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1730 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1735 /* Must be no MKI, since we never offer one */
1736 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1737 SSL_R_BAD_SRTP_MKI_VALUE
);
1741 /* Throw an error if the server gave us an unsolicited extension */
1742 clnt
= SSL_get_srtp_profiles(s
);
1744 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1745 SSL_R_NO_SRTP_PROFILES
);
1750 * Check to see if the server gave us something we support (and
1751 * presumably offered)
1753 for (i
= 0; i
< sk_SRTP_PROTECTION_PROFILE_num(clnt
); i
++) {
1754 prof
= sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
1756 if (prof
->id
== id
) {
1757 s
->srtp_profile
= prof
;
1762 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1763 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1768 int tls_parse_stoc_etm(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1771 /* Ignore if inappropriate ciphersuite */
1772 if (!(s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
1773 && s
->s3
.tmp
.new_cipher
->algorithm_mac
!= SSL_AEAD
1774 && s
->s3
.tmp
.new_cipher
->algorithm_enc
!= SSL_RC4
)
1780 int tls_parse_stoc_ems(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1783 if (s
->options
& SSL_OP_NO_EXTENDED_MASTER_SECRET
)
1785 s
->s3
.flags
|= TLS1_FLAGS_RECEIVED_EXTMS
;
1787 s
->session
->flags
|= SSL_SESS_FLAG_EXTMS
;
1792 int tls_parse_stoc_supported_versions(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1793 X509
*x
, size_t chainidx
)
1795 unsigned int version
;
1797 if (!PACKET_get_net_2(pkt
, &version
)
1798 || PACKET_remaining(pkt
) != 0) {
1799 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1800 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS
,
1801 SSL_R_LENGTH_MISMATCH
);
1806 * The only protocol version we support which is valid in this extension in
1807 * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else.
1809 if (version
!= TLS1_3_VERSION
) {
1810 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1811 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS
,
1812 SSL_R_BAD_PROTOCOL_VERSION_NUMBER
);
1816 /* We ignore this extension for HRRs except to sanity check it */
1817 if (context
== SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
)
1820 /* We just set it here. We validate it in ssl_choose_client_version */
1821 s
->version
= version
;
1826 int tls_parse_stoc_key_share(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1829 #ifndef OPENSSL_NO_TLS1_3
1830 unsigned int group_id
;
1832 EVP_PKEY
*ckey
= s
->s3
.tmp
.pkey
, *skey
= NULL
;
1833 const TLS_GROUP_INFO
*ginf
= NULL
;
1836 if (ckey
== NULL
|| s
->s3
.peer_tmp
!= NULL
) {
1837 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1838 ERR_R_INTERNAL_ERROR
);
1842 if (!PACKET_get_net_2(pkt
, &group_id
)) {
1843 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1844 SSL_R_LENGTH_MISMATCH
);
1848 if ((context
& SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
) != 0) {
1849 const uint16_t *pgroups
= NULL
;
1850 size_t i
, num_groups
;
1852 if (PACKET_remaining(pkt
) != 0) {
1853 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1854 SSL_R_LENGTH_MISMATCH
);
1859 * It is an error if the HelloRetryRequest wants a key_share that we
1860 * already sent in the first ClientHello
1862 if (group_id
== s
->s3
.group_id
) {
1863 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1864 SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1868 /* Validate the selected group is one we support */
1869 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
1870 for (i
= 0; i
< num_groups
; i
++) {
1871 if (group_id
== pgroups
[i
])
1875 || !tls_group_allowed(s
, group_id
, SSL_SECOP_CURVE_SUPPORTED
)) {
1876 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1877 SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1881 s
->s3
.group_id
= group_id
;
1882 EVP_PKEY_free(s
->s3
.tmp
.pkey
);
1883 s
->s3
.tmp
.pkey
= NULL
;
1887 if (group_id
!= s
->s3
.group_id
) {
1889 * This isn't for the group that we sent in the original
1892 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1893 SSL_R_BAD_KEY_SHARE
);
1897 if ((ginf
= tls1_group_id_lookup(s
->ctx
, group_id
)) == NULL
) {
1898 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1899 SSL_R_BAD_KEY_SHARE
);
1903 if (!PACKET_as_length_prefixed_2(pkt
, &encoded_pt
)
1904 || PACKET_remaining(&encoded_pt
) == 0) {
1905 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1906 SSL_R_LENGTH_MISMATCH
);
1910 if (!ginf
->is_kem
) {
1912 skey
= EVP_PKEY_new();
1913 if (skey
== NULL
|| EVP_PKEY_copy_parameters(skey
, ckey
) <= 0) {
1914 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1915 SSL_R_COPY_PARAMETERS_FAILED
);
1919 if (EVP_PKEY_set1_encoded_public_key(skey
, PACKET_data(&encoded_pt
),
1920 PACKET_remaining(&encoded_pt
)) <= 0) {
1921 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1923 EVP_PKEY_free(skey
);
1927 if (ssl_derive(s
, ckey
, skey
, 1) == 0) {
1928 /* SSLfatal() already called */
1929 EVP_PKEY_free(skey
);
1932 s
->s3
.peer_tmp
= skey
;
1935 const unsigned char *ct
= PACKET_data(&encoded_pt
);
1936 size_t ctlen
= PACKET_remaining(&encoded_pt
);
1938 if (ssl_decapsulate(s
, ckey
, ct
, ctlen
, 1) == 0) {
1939 /* SSLfatal() already called */
1948 int tls_parse_stoc_cookie(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1953 if (!PACKET_as_length_prefixed_2(pkt
, &cookie
)
1954 || !PACKET_memdup(&cookie
, &s
->ext
.tls13_cookie
,
1955 &s
->ext
.tls13_cookie_len
)) {
1956 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_COOKIE
,
1957 SSL_R_LENGTH_MISMATCH
);
1964 int tls_parse_stoc_early_data(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1965 X509
*x
, size_t chainidx
)
1967 if (context
== SSL_EXT_TLS1_3_NEW_SESSION_TICKET
) {
1968 unsigned long max_early_data
;
1970 if (!PACKET_get_net_4(pkt
, &max_early_data
)
1971 || PACKET_remaining(pkt
) != 0) {
1972 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1973 SSL_R_INVALID_MAX_EARLY_DATA
);
1977 s
->session
->ext
.max_early_data
= max_early_data
;
1982 if (PACKET_remaining(pkt
) != 0) {
1983 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1984 SSL_R_BAD_EXTENSION
);
1988 if (!s
->ext
.early_data_ok
1991 * If we get here then we didn't send early data, or we didn't resume
1992 * using the first identity, or the SNI/ALPN is not consistent so the
1993 * server should not be accepting it.
1995 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1996 SSL_R_BAD_EXTENSION
);
2000 s
->ext
.early_data
= SSL_EARLY_DATA_ACCEPTED
;
2005 int tls_parse_stoc_psk(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
2008 #ifndef OPENSSL_NO_TLS1_3
2009 unsigned int identity
;
2011 if (!PACKET_get_net_2(pkt
, &identity
) || PACKET_remaining(pkt
) != 0) {
2012 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_PSK
,
2013 SSL_R_LENGTH_MISMATCH
);
2017 if (identity
>= (unsigned int)s
->ext
.tick_identity
) {
2018 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_PSK
,
2019 SSL_R_BAD_PSK_IDENTITY
);
2024 * Session resumption tickets are always sent before PSK tickets. If the
2025 * ticket index is 0 then it must be for a session resumption ticket if we
2026 * sent two tickets, or if we didn't send a PSK ticket.
2028 if (identity
== 0 && (s
->psksession
== NULL
|| s
->ext
.tick_identity
== 2)) {
2030 SSL_SESSION_free(s
->psksession
);
2031 s
->psksession
= NULL
;
2035 if (s
->psksession
== NULL
) {
2036 /* Should never happen */
2037 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_PSK
,
2038 ERR_R_INTERNAL_ERROR
);
2043 * If we used the external PSK for sending early_data then s->early_secret
2044 * is already set up, so don't overwrite it. Otherwise we copy the
2045 * early_secret across that we generated earlier.
2047 if ((s
->early_data_state
!= SSL_EARLY_DATA_WRITE_RETRY
2048 && s
->early_data_state
!= SSL_EARLY_DATA_FINISHED_WRITING
)
2049 || s
->session
->ext
.max_early_data
> 0
2050 || s
->psksession
->ext
.max_early_data
== 0)
2051 memcpy(s
->early_secret
, s
->psksession
->early_secret
, EVP_MAX_MD_SIZE
);
2053 SSL_SESSION_free(s
->session
);
2054 s
->session
= s
->psksession
;
2055 s
->psksession
= NULL
;
2057 /* Early data is only allowed if we used the first ticket */
2059 s
->ext
.early_data_ok
= 0;