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 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
, 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
, 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 (max_version
< TLS1_3_VERSION
)
211 return EXT_RETURN_NOT_SENT
;
213 if (!use_ecc(s
, 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
, 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 * TODO(3.0) Remove this when EVP_PKEY_get1_tls_encodedpoint()
650 * knows how to get a key from an encoded point with the help of
651 * a OSSL_SERIALIZER deserializer. We know that EVP_PKEY_get0()
652 * downgrades an EVP_PKEY to contain a legacy key.
656 EVP_PKEY_get0(key_share_key
);
657 if (EVP_PKEY_id(key_share_key
) == EVP_PKEY_NONE
) {
658 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
,
664 /* Encode the public key. */
665 encodedlen
= EVP_PKEY_get1_tls_encodedpoint(key_share_key
,
667 if (encodedlen
== 0) {
668 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
, ERR_R_EC_LIB
);
672 /* Create KeyShareEntry */
673 if (!WPACKET_put_bytes_u16(pkt
, curve_id
)
674 || !WPACKET_sub_memcpy_u16(pkt
, encoded_point
, encodedlen
)) {
675 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
,
676 ERR_R_INTERNAL_ERROR
);
681 * TODO(TLS1.3): When changing to send more than one key_share we're
682 * going to need to be able to save more than one EVP_PKEY. For now
683 * we reuse the existing tmp.pkey
685 s
->s3
.tmp
.pkey
= key_share_key
;
686 s
->s3
.group_id
= curve_id
;
687 OPENSSL_free(encoded_point
);
691 if (s
->s3
.tmp
.pkey
== NULL
)
692 EVP_PKEY_free(key_share_key
);
693 OPENSSL_free(encoded_point
);
698 EXT_RETURN
tls_construct_ctos_key_share(SSL
*s
, WPACKET
*pkt
,
699 unsigned int context
, X509
*x
,
702 #ifndef OPENSSL_NO_TLS1_3
703 size_t i
, num_groups
= 0;
704 const uint16_t *pgroups
= NULL
;
705 uint16_t curve_id
= 0;
707 /* key_share extension */
708 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_key_share
)
709 /* Extension data sub-packet */
710 || !WPACKET_start_sub_packet_u16(pkt
)
711 /* KeyShare list sub-packet */
712 || !WPACKET_start_sub_packet_u16(pkt
)) {
713 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
714 ERR_R_INTERNAL_ERROR
);
715 return EXT_RETURN_FAIL
;
718 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
721 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
724 if (s
->s3
.group_id
!= 0) {
725 curve_id
= s
->s3
.group_id
;
727 for (i
= 0; i
< num_groups
; i
++) {
729 if (!tls_group_allowed(s
, pgroups
[i
], SSL_SECOP_CURVE_SUPPORTED
))
732 curve_id
= pgroups
[i
];
738 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
739 SSL_R_NO_SUITABLE_KEY_SHARE
);
740 return EXT_RETURN_FAIL
;
743 if (!add_key_share(s
, pkt
, curve_id
)) {
744 /* SSLfatal() already called */
745 return EXT_RETURN_FAIL
;
748 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
749 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
750 ERR_R_INTERNAL_ERROR
);
751 return EXT_RETURN_FAIL
;
753 return EXT_RETURN_SENT
;
755 return EXT_RETURN_NOT_SENT
;
759 EXT_RETURN
tls_construct_ctos_cookie(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
760 X509
*x
, size_t chainidx
)
762 EXT_RETURN ret
= EXT_RETURN_FAIL
;
764 /* Should only be set if we've had an HRR */
765 if (s
->ext
.tls13_cookie_len
== 0)
766 return EXT_RETURN_NOT_SENT
;
768 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_cookie
)
769 /* Extension data sub-packet */
770 || !WPACKET_start_sub_packet_u16(pkt
)
771 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.tls13_cookie
,
772 s
->ext
.tls13_cookie_len
)
773 || !WPACKET_close(pkt
)) {
774 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_COOKIE
,
775 ERR_R_INTERNAL_ERROR
);
779 ret
= EXT_RETURN_SENT
;
781 OPENSSL_free(s
->ext
.tls13_cookie
);
782 s
->ext
.tls13_cookie
= NULL
;
783 s
->ext
.tls13_cookie_len
= 0;
788 EXT_RETURN
tls_construct_ctos_early_data(SSL
*s
, WPACKET
*pkt
,
789 unsigned int context
, X509
*x
,
792 #ifndef OPENSSL_NO_PSK
793 char identity
[PSK_MAX_IDENTITY_LEN
+ 1];
794 #endif /* OPENSSL_NO_PSK */
795 const unsigned char *id
= NULL
;
797 SSL_SESSION
*psksess
= NULL
;
798 SSL_SESSION
*edsess
= NULL
;
799 const EVP_MD
*handmd
= NULL
;
801 if (s
->hello_retry_request
== SSL_HRR_PENDING
)
802 handmd
= ssl_handshake_md(s
);
804 if (s
->psk_use_session_cb
!= NULL
805 && (!s
->psk_use_session_cb(s
, handmd
, &id
, &idlen
, &psksess
)
807 && psksess
->ssl_version
!= TLS1_3_VERSION
))) {
808 SSL_SESSION_free(psksess
);
809 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
811 return EXT_RETURN_FAIL
;
814 #ifndef OPENSSL_NO_PSK
815 if (psksess
== NULL
&& s
->psk_client_callback
!= NULL
) {
816 unsigned char psk
[PSK_MAX_PSK_LEN
];
819 memset(identity
, 0, sizeof(identity
));
820 psklen
= s
->psk_client_callback(s
, NULL
, identity
, sizeof(identity
) - 1,
823 if (psklen
> PSK_MAX_PSK_LEN
) {
824 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
,
825 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
826 return EXT_RETURN_FAIL
;
827 } else if (psklen
> 0) {
828 const unsigned char tls13_aes128gcmsha256_id
[] = { 0x13, 0x01 };
829 const SSL_CIPHER
*cipher
;
831 idlen
= strlen(identity
);
832 if (idlen
> PSK_MAX_IDENTITY_LEN
) {
833 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
834 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
835 ERR_R_INTERNAL_ERROR
);
836 return EXT_RETURN_FAIL
;
838 id
= (unsigned char *)identity
;
841 * We found a PSK using an old style callback. We don't know
842 * the digest so we default to SHA256 as per the TLSv1.3 spec
844 cipher
= SSL_CIPHER_find(s
, tls13_aes128gcmsha256_id
);
845 if (cipher
== NULL
) {
846 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
847 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
848 ERR_R_INTERNAL_ERROR
);
849 return EXT_RETURN_FAIL
;
852 psksess
= SSL_SESSION_new();
854 || !SSL_SESSION_set1_master_key(psksess
, psk
, psklen
)
855 || !SSL_SESSION_set_cipher(psksess
, cipher
)
856 || !SSL_SESSION_set_protocol_version(psksess
, TLS1_3_VERSION
)) {
857 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
858 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
859 ERR_R_INTERNAL_ERROR
);
860 OPENSSL_cleanse(psk
, psklen
);
861 return EXT_RETURN_FAIL
;
863 OPENSSL_cleanse(psk
, psklen
);
866 #endif /* OPENSSL_NO_PSK */
868 SSL_SESSION_free(s
->psksession
);
869 s
->psksession
= psksess
;
870 if (psksess
!= NULL
) {
871 OPENSSL_free(s
->psksession_id
);
872 s
->psksession_id
= OPENSSL_memdup(id
, idlen
);
873 if (s
->psksession_id
== NULL
) {
874 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
875 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
876 return EXT_RETURN_FAIL
;
878 s
->psksession_id_len
= idlen
;
881 if (s
->early_data_state
!= SSL_EARLY_DATA_CONNECTING
882 || (s
->session
->ext
.max_early_data
== 0
883 && (psksess
== NULL
|| psksess
->ext
.max_early_data
== 0))) {
884 s
->max_early_data
= 0;
885 return EXT_RETURN_NOT_SENT
;
887 edsess
= s
->session
->ext
.max_early_data
!= 0 ? s
->session
: psksess
;
888 s
->max_early_data
= edsess
->ext
.max_early_data
;
890 if (edsess
->ext
.hostname
!= NULL
) {
891 if (s
->ext
.hostname
== NULL
892 || (s
->ext
.hostname
!= NULL
893 && strcmp(s
->ext
.hostname
, edsess
->ext
.hostname
) != 0)) {
894 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
895 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
896 SSL_R_INCONSISTENT_EARLY_DATA_SNI
);
897 return EXT_RETURN_FAIL
;
901 if ((s
->ext
.alpn
== NULL
&& edsess
->ext
.alpn_selected
!= NULL
)) {
902 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
903 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
904 return EXT_RETURN_FAIL
;
908 * Verify that we are offering an ALPN protocol consistent with the early
911 if (edsess
->ext
.alpn_selected
!= NULL
) {
912 PACKET prots
, alpnpkt
;
915 if (!PACKET_buf_init(&prots
, s
->ext
.alpn
, s
->ext
.alpn_len
)) {
916 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
917 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
918 return EXT_RETURN_FAIL
;
920 while (PACKET_get_length_prefixed_1(&prots
, &alpnpkt
)) {
921 if (PACKET_equal(&alpnpkt
, edsess
->ext
.alpn_selected
,
922 edsess
->ext
.alpn_selected_len
)) {
928 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
929 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
930 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
931 return EXT_RETURN_FAIL
;
935 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_early_data
)
936 || !WPACKET_start_sub_packet_u16(pkt
)
937 || !WPACKET_close(pkt
)) {
938 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
939 ERR_R_INTERNAL_ERROR
);
940 return EXT_RETURN_FAIL
;
944 * We set this to rejected here. Later, if the server acknowledges the
945 * extension, we set it to accepted.
947 s
->ext
.early_data
= SSL_EARLY_DATA_REJECTED
;
948 s
->ext
.early_data_ok
= 1;
950 return EXT_RETURN_SENT
;
953 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
954 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
957 * PSK pre binder overhead =
958 * 2 bytes for TLSEXT_TYPE_psk
959 * 2 bytes for extension length
960 * 2 bytes for identities list length
961 * 2 bytes for identity length
962 * 4 bytes for obfuscated_ticket_age
963 * 2 bytes for binder list length
964 * 1 byte for binder length
965 * The above excludes the number of bytes for the identity itself and the
966 * subsequent binder bytes
968 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
970 EXT_RETURN
tls_construct_ctos_padding(SSL
*s
, WPACKET
*pkt
,
971 unsigned int context
, X509
*x
,
974 unsigned char *padbytes
;
977 if ((s
->options
& SSL_OP_TLSEXT_PADDING
) == 0)
978 return EXT_RETURN_NOT_SENT
;
981 * Add padding to workaround bugs in F5 terminators. See RFC7685.
982 * This code calculates the length of all extensions added so far but
983 * excludes the PSK extension (because that MUST be written last). Therefore
984 * this extension MUST always appear second to last.
986 if (!WPACKET_get_total_written(pkt
, &hlen
)) {
987 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PADDING
,
988 ERR_R_INTERNAL_ERROR
);
989 return EXT_RETURN_FAIL
;
993 * If we're going to send a PSK then that will be written out after this
994 * extension, so we need to calculate how long it is going to be.
996 if (s
->session
->ssl_version
== TLS1_3_VERSION
997 && s
->session
->ext
.ticklen
!= 0
998 && s
->session
->cipher
!= NULL
) {
999 const EVP_MD
*md
= ssl_md(s
->ctx
, s
->session
->cipher
->algorithm2
);
1003 * Add the fixed PSK overhead, the identity length and the binder
1006 hlen
+= PSK_PRE_BINDER_OVERHEAD
+ s
->session
->ext
.ticklen
1011 if (hlen
> F5_WORKAROUND_MIN_MSG_LEN
&& hlen
< F5_WORKAROUND_MAX_MSG_LEN
) {
1012 /* Calculate the amount of padding we need to add */
1013 hlen
= F5_WORKAROUND_MAX_MSG_LEN
- hlen
;
1016 * Take off the size of extension header itself (2 bytes for type and
1017 * 2 bytes for length bytes), but ensure that the extension is at least
1018 * 1 byte long so as not to have an empty extension last (WebSphere 7.x,
1019 * 8.x are intolerant of that condition)
1026 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_padding
)
1027 || !WPACKET_sub_allocate_bytes_u16(pkt
, hlen
, &padbytes
)) {
1028 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PADDING
,
1029 ERR_R_INTERNAL_ERROR
);
1030 return EXT_RETURN_FAIL
;
1032 memset(padbytes
, 0, hlen
);
1035 return EXT_RETURN_SENT
;
1039 * Construct the pre_shared_key extension
1041 EXT_RETURN
tls_construct_ctos_psk(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
1042 X509
*x
, size_t chainidx
)
1044 #ifndef OPENSSL_NO_TLS1_3
1045 uint32_t now
, agesec
, agems
= 0;
1046 size_t reshashsize
= 0, pskhashsize
= 0, binderoffset
, msglen
;
1047 unsigned char *resbinder
= NULL
, *pskbinder
= NULL
, *msgstart
= NULL
;
1048 const EVP_MD
*handmd
= NULL
, *mdres
= NULL
, *mdpsk
= NULL
;
1051 s
->ext
.tick_identity
= 0;
1054 * Note: At this stage of the code we only support adding a single
1055 * resumption PSK. If we add support for multiple PSKs then the length
1056 * calculations in the padding extension will need to be adjusted.
1060 * If this is an incompatible or new session then we have nothing to resume
1061 * so don't add this extension.
1063 if (s
->session
->ssl_version
!= TLS1_3_VERSION
1064 || (s
->session
->ext
.ticklen
== 0 && s
->psksession
== NULL
))
1065 return EXT_RETURN_NOT_SENT
;
1067 if (s
->hello_retry_request
== SSL_HRR_PENDING
)
1068 handmd
= ssl_handshake_md(s
);
1070 if (s
->session
->ext
.ticklen
!= 0) {
1071 /* Get the digest associated with the ciphersuite in the session */
1072 if (s
->session
->cipher
== NULL
) {
1073 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1074 ERR_R_INTERNAL_ERROR
);
1075 return EXT_RETURN_FAIL
;
1077 mdres
= ssl_md(s
->ctx
, s
->session
->cipher
->algorithm2
);
1078 if (mdres
== NULL
) {
1080 * Don't recognize this cipher so we can't use the session.
1086 if (s
->hello_retry_request
== SSL_HRR_PENDING
&& mdres
!= handmd
) {
1088 * Selected ciphersuite hash does not match the hash for the session
1089 * so we can't use it.
1095 * Technically the C standard just says time() returns a time_t and says
1096 * nothing about the encoding of that type. In practice most
1097 * implementations follow POSIX which holds it as an integral type in
1098 * seconds since epoch. We've already made the assumption that we can do
1099 * this in multiple places in the code, so portability shouldn't be an
1102 now
= (uint32_t)time(NULL
);
1103 agesec
= now
- (uint32_t)s
->session
->time
;
1105 * We calculate the age in seconds but the server may work in ms. Due to
1106 * rounding errors we could overestimate the age by up to 1s. It is
1107 * better to underestimate it. Otherwise, if the RTT is very short, when
1108 * the server calculates the age reported by the client it could be
1109 * bigger than the age calculated on the server - which should never
1115 if (s
->session
->ext
.tick_lifetime_hint
< agesec
) {
1116 /* Ticket is too old. Ignore it. */
1121 * Calculate age in ms. We're just doing it to nearest second. Should be
1124 agems
= agesec
* (uint32_t)1000;
1126 if (agesec
!= 0 && agems
/ (uint32_t)1000 != agesec
) {
1128 * Overflow. Shouldn't happen unless this is a *really* old session.
1129 * If so we just ignore it.
1135 * Obfuscate the age. Overflow here is fine, this addition is supposed
1138 agems
+= s
->session
->ext
.tick_age_add
;
1140 reshashsize
= EVP_MD_size(mdres
);
1141 s
->ext
.tick_identity
++;
1146 if (!dores
&& s
->psksession
== NULL
)
1147 return EXT_RETURN_NOT_SENT
;
1149 if (s
->psksession
!= NULL
) {
1150 mdpsk
= ssl_md(s
->ctx
, s
->psksession
->cipher
->algorithm2
);
1151 if (mdpsk
== NULL
) {
1153 * Don't recognize this cipher so we can't use the session.
1154 * If this happens it's an application bug.
1156 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1158 return EXT_RETURN_FAIL
;
1161 if (s
->hello_retry_request
== SSL_HRR_PENDING
&& mdpsk
!= handmd
) {
1163 * Selected ciphersuite hash does not match the hash for the PSK
1164 * session. This is an application bug.
1166 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1168 return EXT_RETURN_FAIL
;
1171 pskhashsize
= EVP_MD_size(mdpsk
);
1174 /* Create the extension, but skip over the binder for now */
1175 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk
)
1176 || !WPACKET_start_sub_packet_u16(pkt
)
1177 || !WPACKET_start_sub_packet_u16(pkt
)) {
1178 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1179 ERR_R_INTERNAL_ERROR
);
1180 return EXT_RETURN_FAIL
;
1184 if (!WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
,
1185 s
->session
->ext
.ticklen
)
1186 || !WPACKET_put_bytes_u32(pkt
, agems
)) {
1187 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1188 ERR_R_INTERNAL_ERROR
);
1189 return EXT_RETURN_FAIL
;
1193 if (s
->psksession
!= NULL
) {
1194 if (!WPACKET_sub_memcpy_u16(pkt
, s
->psksession_id
,
1195 s
->psksession_id_len
)
1196 || !WPACKET_put_bytes_u32(pkt
, 0)) {
1197 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1198 ERR_R_INTERNAL_ERROR
);
1199 return EXT_RETURN_FAIL
;
1201 s
->ext
.tick_identity
++;
1204 if (!WPACKET_close(pkt
)
1205 || !WPACKET_get_total_written(pkt
, &binderoffset
)
1206 || !WPACKET_start_sub_packet_u16(pkt
)
1208 && !WPACKET_sub_allocate_bytes_u8(pkt
, reshashsize
, &resbinder
))
1209 || (s
->psksession
!= NULL
1210 && !WPACKET_sub_allocate_bytes_u8(pkt
, pskhashsize
, &pskbinder
))
1211 || !WPACKET_close(pkt
)
1212 || !WPACKET_close(pkt
)
1213 || !WPACKET_get_total_written(pkt
, &msglen
)
1215 * We need to fill in all the sub-packet lengths now so we can
1216 * calculate the HMAC of the message up to the binders
1218 || !WPACKET_fill_lengths(pkt
)) {
1219 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1220 ERR_R_INTERNAL_ERROR
);
1221 return EXT_RETURN_FAIL
;
1224 msgstart
= WPACKET_get_curr(pkt
) - msglen
;
1227 && tls_psk_do_binder(s
, mdres
, msgstart
, binderoffset
, NULL
,
1228 resbinder
, s
->session
, 1, 0) != 1) {
1229 /* SSLfatal() already called */
1230 return EXT_RETURN_FAIL
;
1233 if (s
->psksession
!= NULL
1234 && tls_psk_do_binder(s
, mdpsk
, msgstart
, binderoffset
, NULL
,
1235 pskbinder
, s
->psksession
, 1, 1) != 1) {
1236 /* SSLfatal() already called */
1237 return EXT_RETURN_FAIL
;
1240 return EXT_RETURN_SENT
;
1242 return EXT_RETURN_NOT_SENT
;
1246 EXT_RETURN
tls_construct_ctos_post_handshake_auth(SSL
*s
, WPACKET
*pkt
,
1247 unsigned int context
,
1248 X509
*x
, size_t chainidx
)
1250 #ifndef OPENSSL_NO_TLS1_3
1251 if (!s
->pha_enabled
)
1252 return EXT_RETURN_NOT_SENT
;
1254 /* construct extension - 0 length, no contents */
1255 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_post_handshake_auth
)
1256 || !WPACKET_start_sub_packet_u16(pkt
)
1257 || !WPACKET_close(pkt
)) {
1258 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1259 SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH
,
1260 ERR_R_INTERNAL_ERROR
);
1261 return EXT_RETURN_FAIL
;
1264 s
->post_handshake_auth
= SSL_PHA_EXT_SENT
;
1266 return EXT_RETURN_SENT
;
1268 return EXT_RETURN_NOT_SENT
;
1274 * Parse the server's renegotiation binding and abort if it's not right
1276 int tls_parse_stoc_renegotiate(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1277 X509
*x
, size_t chainidx
)
1279 size_t expected_len
= s
->s3
.previous_client_finished_len
1280 + s
->s3
.previous_server_finished_len
;
1282 const unsigned char *data
;
1284 /* Check for logic errors */
1285 if (!ossl_assert(expected_len
== 0
1286 || s
->s3
.previous_client_finished_len
!= 0)
1287 || !ossl_assert(expected_len
== 0
1288 || s
->s3
.previous_server_finished_len
!= 0)) {
1289 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1290 ERR_R_INTERNAL_ERROR
);
1294 /* Parse the length byte */
1295 if (!PACKET_get_1_len(pkt
, &ilen
)) {
1296 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1297 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1301 /* Consistency check */
1302 if (PACKET_remaining(pkt
) != ilen
) {
1303 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1304 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1308 /* Check that the extension matches */
1309 if (ilen
!= expected_len
) {
1310 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1311 SSL_R_RENEGOTIATION_MISMATCH
);
1315 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
.previous_client_finished_len
)
1316 || memcmp(data
, s
->s3
.previous_client_finished
,
1317 s
->s3
.previous_client_finished_len
) != 0) {
1318 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1319 SSL_R_RENEGOTIATION_MISMATCH
);
1323 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
.previous_server_finished_len
)
1324 || memcmp(data
, s
->s3
.previous_server_finished
,
1325 s
->s3
.previous_server_finished_len
) != 0) {
1326 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1327 SSL_R_RENEGOTIATION_MISMATCH
);
1330 s
->s3
.send_connection_binding
= 1;
1335 /* Parse the server's max fragment len extension packet */
1336 int tls_parse_stoc_maxfragmentlen(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1337 X509
*x
, size_t chainidx
)
1341 if (PACKET_remaining(pkt
) != 1 || !PACKET_get_1(pkt
, &value
)) {
1342 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1343 SSL_R_BAD_EXTENSION
);
1347 /* |value| should contains a valid max-fragment-length code. */
1348 if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value
)) {
1349 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1350 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1351 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH
);
1355 /* Must be the same value as client-configured one who was sent to server */
1357 * RFC 6066: if a client receives a maximum fragment length negotiation
1358 * response that differs from the length it requested, ...
1359 * It must abort with SSL_AD_ILLEGAL_PARAMETER alert
1361 if (value
!= s
->ext
.max_fragment_len_mode
) {
1362 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1363 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1364 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH
);
1369 * Maximum Fragment Length Negotiation succeeded.
1370 * The negotiated Maximum Fragment Length is binding now.
1372 s
->session
->ext
.max_fragment_len_mode
= value
;
1377 int tls_parse_stoc_server_name(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1378 X509
*x
, size_t chainidx
)
1380 if (s
->ext
.hostname
== NULL
) {
1381 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1382 ERR_R_INTERNAL_ERROR
);
1386 if (PACKET_remaining(pkt
) > 0) {
1387 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1388 SSL_R_BAD_EXTENSION
);
1393 if (s
->session
->ext
.hostname
!= NULL
) {
1394 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1395 ERR_R_INTERNAL_ERROR
);
1398 s
->session
->ext
.hostname
= OPENSSL_strdup(s
->ext
.hostname
);
1399 if (s
->session
->ext
.hostname
== NULL
) {
1400 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1401 ERR_R_INTERNAL_ERROR
);
1409 #ifndef OPENSSL_NO_EC
1410 int tls_parse_stoc_ec_pt_formats(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1411 X509
*x
, size_t chainidx
)
1413 size_t ecpointformats_len
;
1414 PACKET ecptformatlist
;
1416 if (!PACKET_as_length_prefixed_1(pkt
, &ecptformatlist
)) {
1417 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
,
1418 SSL_R_BAD_EXTENSION
);
1422 ecpointformats_len
= PACKET_remaining(&ecptformatlist
);
1423 if (ecpointformats_len
== 0) {
1424 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1425 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, SSL_R_BAD_LENGTH
);
1429 s
->ext
.peer_ecpointformats_len
= 0;
1430 OPENSSL_free(s
->ext
.peer_ecpointformats
);
1431 s
->ext
.peer_ecpointformats
= OPENSSL_malloc(ecpointformats_len
);
1432 if (s
->ext
.peer_ecpointformats
== NULL
) {
1433 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1434 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
1438 s
->ext
.peer_ecpointformats_len
= ecpointformats_len
;
1440 if (!PACKET_copy_bytes(&ecptformatlist
,
1441 s
->ext
.peer_ecpointformats
,
1442 ecpointformats_len
)) {
1443 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1444 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
1453 int tls_parse_stoc_session_ticket(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1454 X509
*x
, size_t chainidx
)
1456 if (s
->ext
.session_ticket_cb
!= NULL
&&
1457 !s
->ext
.session_ticket_cb(s
, PACKET_data(pkt
),
1458 PACKET_remaining(pkt
),
1459 s
->ext
.session_ticket_cb_arg
)) {
1460 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
,
1461 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1465 if (!tls_use_ticket(s
)) {
1466 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
,
1467 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1470 if (PACKET_remaining(pkt
) > 0) {
1471 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1472 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1476 s
->ext
.ticket_expected
= 1;
1481 #ifndef OPENSSL_NO_OCSP
1482 int tls_parse_stoc_status_request(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1483 X509
*x
, size_t chainidx
)
1485 if (context
== SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
) {
1486 /* We ignore this if the server sends a CertificateRequest */
1487 /* TODO(TLS1.3): Add support for this */
1492 * MUST only be sent if we've requested a status
1493 * request message. In TLS <= 1.2 it must also be empty.
1495 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
) {
1496 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
,
1497 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST
, SSL_R_BAD_EXTENSION
);
1500 if (!SSL_IS_TLS13(s
) && PACKET_remaining(pkt
) > 0) {
1501 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1502 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST
, SSL_R_BAD_EXTENSION
);
1506 if (SSL_IS_TLS13(s
)) {
1507 /* We only know how to handle this if it's for the first Certificate in
1508 * the chain. We ignore any other responses.
1513 /* SSLfatal() already called */
1514 return tls_process_cert_status_body(s
, pkt
);
1517 /* Set flag to expect CertificateStatus message */
1518 s
->ext
.status_expected
= 1;
1525 #ifndef OPENSSL_NO_CT
1526 int tls_parse_stoc_sct(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1529 if (context
== SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
) {
1530 /* We ignore this if the server sends it in a CertificateRequest */
1531 /* TODO(TLS1.3): Add support for this */
1536 * Only take it if we asked for it - i.e if there is no CT validation
1537 * callback set, then a custom extension MAY be processing it, so we
1538 * need to let control continue to flow to that.
1540 if (s
->ct_validation_callback
!= NULL
) {
1541 size_t size
= PACKET_remaining(pkt
);
1543 /* Simply copy it off for later processing */
1544 OPENSSL_free(s
->ext
.scts
);
1547 s
->ext
.scts_len
= (uint16_t)size
;
1549 s
->ext
.scts
= OPENSSL_malloc(size
);
1550 if (s
->ext
.scts
== NULL
1551 || !PACKET_copy_bytes(pkt
, s
->ext
.scts
, size
)) {
1552 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SCT
,
1553 ERR_R_INTERNAL_ERROR
);
1558 ENDPOINT role
= (context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0
1559 ? ENDPOINT_CLIENT
: ENDPOINT_BOTH
;
1562 * If we didn't ask for it then there must be a custom extension,
1563 * otherwise this is unsolicited.
1565 if (custom_ext_find(&s
->cert
->custext
, role
,
1566 TLSEXT_TYPE_signed_certificate_timestamp
,
1568 SSLfatal(s
, TLS1_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_SCT
,
1569 SSL_R_BAD_EXTENSION
);
1573 if (!custom_ext_parse(s
, context
,
1574 TLSEXT_TYPE_signed_certificate_timestamp
,
1575 PACKET_data(pkt
), PACKET_remaining(pkt
),
1577 /* SSLfatal already called */
1587 #ifndef OPENSSL_NO_NEXTPROTONEG
1589 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1590 * elements of zero length are allowed and the set of elements must exactly
1591 * fill the length of the block. Returns 1 on success or 0 on failure.
1593 static int ssl_next_proto_validate(SSL
*s
, PACKET
*pkt
)
1595 PACKET tmp_protocol
;
1597 while (PACKET_remaining(pkt
)) {
1598 if (!PACKET_get_length_prefixed_1(pkt
, &tmp_protocol
)
1599 || PACKET_remaining(&tmp_protocol
) == 0) {
1600 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_SSL_NEXT_PROTO_VALIDATE
,
1601 SSL_R_BAD_EXTENSION
);
1609 int tls_parse_stoc_npn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1612 unsigned char *selected
;
1613 unsigned char selected_len
;
1616 /* Check if we are in a renegotiation. If so ignore this extension */
1617 if (!SSL_IS_FIRST_HANDSHAKE(s
))
1620 /* We must have requested it. */
1621 if (s
->ctx
->ext
.npn_select_cb
== NULL
) {
1622 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_NPN
,
1623 SSL_R_BAD_EXTENSION
);
1627 /* The data must be valid */
1629 if (!ssl_next_proto_validate(s
, &tmppkt
)) {
1630 /* SSLfatal() already called */
1633 if (s
->ctx
->ext
.npn_select_cb(s
, &selected
, &selected_len
,
1635 PACKET_remaining(pkt
),
1636 s
->ctx
->ext
.npn_select_cb_arg
) !=
1637 SSL_TLSEXT_ERR_OK
) {
1638 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
, SSL_F_TLS_PARSE_STOC_NPN
,
1639 SSL_R_BAD_EXTENSION
);
1644 * Could be non-NULL if server has sent multiple NPN extensions in
1645 * a single Serverhello
1647 OPENSSL_free(s
->ext
.npn
);
1648 s
->ext
.npn
= OPENSSL_malloc(selected_len
);
1649 if (s
->ext
.npn
== NULL
) {
1650 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_NPN
,
1651 ERR_R_INTERNAL_ERROR
);
1655 memcpy(s
->ext
.npn
, selected
, selected_len
);
1656 s
->ext
.npn_len
= selected_len
;
1663 int tls_parse_stoc_alpn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1668 /* We must have requested it. */
1669 if (!s
->s3
.alpn_sent
) {
1670 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_ALPN
,
1671 SSL_R_BAD_EXTENSION
);
1675 * The extension data consists of:
1676 * uint16 list_length
1677 * uint8 proto_length;
1678 * uint8 proto[proto_length];
1680 if (!PACKET_get_net_2_len(pkt
, &len
)
1681 || PACKET_remaining(pkt
) != len
|| !PACKET_get_1_len(pkt
, &len
)
1682 || PACKET_remaining(pkt
) != len
) {
1683 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1684 SSL_R_BAD_EXTENSION
);
1687 OPENSSL_free(s
->s3
.alpn_selected
);
1688 s
->s3
.alpn_selected
= OPENSSL_malloc(len
);
1689 if (s
->s3
.alpn_selected
== NULL
) {
1690 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1691 ERR_R_INTERNAL_ERROR
);
1694 if (!PACKET_copy_bytes(pkt
, s
->s3
.alpn_selected
, len
)) {
1695 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1696 SSL_R_BAD_EXTENSION
);
1699 s
->s3
.alpn_selected_len
= len
;
1701 if (s
->session
->ext
.alpn_selected
== NULL
1702 || s
->session
->ext
.alpn_selected_len
!= len
1703 || memcmp(s
->session
->ext
.alpn_selected
, s
->s3
.alpn_selected
, len
)
1705 /* ALPN not consistent with the old session so cannot use early_data */
1706 s
->ext
.early_data_ok
= 0;
1710 * This is a new session and so alpn_selected should have been
1711 * initialised to NULL. We should update it with the selected ALPN.
1713 if (!ossl_assert(s
->session
->ext
.alpn_selected
== NULL
)) {
1714 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1715 ERR_R_INTERNAL_ERROR
);
1718 s
->session
->ext
.alpn_selected
=
1719 OPENSSL_memdup(s
->s3
.alpn_selected
, s
->s3
.alpn_selected_len
);
1720 if (s
->session
->ext
.alpn_selected
== NULL
) {
1721 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1722 ERR_R_INTERNAL_ERROR
);
1725 s
->session
->ext
.alpn_selected_len
= s
->s3
.alpn_selected_len
;
1731 #ifndef OPENSSL_NO_SRTP
1732 int tls_parse_stoc_use_srtp(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1735 unsigned int id
, ct
, mki
;
1737 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
;
1738 SRTP_PROTECTION_PROFILE
*prof
;
1740 if (!PACKET_get_net_2(pkt
, &ct
) || ct
!= 2
1741 || !PACKET_get_net_2(pkt
, &id
)
1742 || !PACKET_get_1(pkt
, &mki
)
1743 || PACKET_remaining(pkt
) != 0) {
1744 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1745 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1750 /* Must be no MKI, since we never offer one */
1751 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1752 SSL_R_BAD_SRTP_MKI_VALUE
);
1756 /* Throw an error if the server gave us an unsolicited extension */
1757 clnt
= SSL_get_srtp_profiles(s
);
1759 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1760 SSL_R_NO_SRTP_PROFILES
);
1765 * Check to see if the server gave us something we support (and
1766 * presumably offered)
1768 for (i
= 0; i
< sk_SRTP_PROTECTION_PROFILE_num(clnt
); i
++) {
1769 prof
= sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
1771 if (prof
->id
== id
) {
1772 s
->srtp_profile
= prof
;
1777 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1778 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1783 int tls_parse_stoc_etm(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1786 /* Ignore if inappropriate ciphersuite */
1787 if (!(s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
1788 && s
->s3
.tmp
.new_cipher
->algorithm_mac
!= SSL_AEAD
1789 && s
->s3
.tmp
.new_cipher
->algorithm_enc
!= SSL_RC4
)
1795 int tls_parse_stoc_ems(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1798 if (s
->options
& SSL_OP_NO_EXTENDED_MASTER_SECRET
)
1800 s
->s3
.flags
|= TLS1_FLAGS_RECEIVED_EXTMS
;
1802 s
->session
->flags
|= SSL_SESS_FLAG_EXTMS
;
1807 int tls_parse_stoc_supported_versions(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1808 X509
*x
, size_t chainidx
)
1810 unsigned int version
;
1812 if (!PACKET_get_net_2(pkt
, &version
)
1813 || PACKET_remaining(pkt
) != 0) {
1814 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1815 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS
,
1816 SSL_R_LENGTH_MISMATCH
);
1821 * The only protocol version we support which is valid in this extension in
1822 * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else.
1824 if (version
!= TLS1_3_VERSION
) {
1825 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1826 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS
,
1827 SSL_R_BAD_PROTOCOL_VERSION_NUMBER
);
1831 /* We ignore this extension for HRRs except to sanity check it */
1832 if (context
== SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
)
1835 /* We just set it here. We validate it in ssl_choose_client_version */
1836 s
->version
= version
;
1841 int tls_parse_stoc_key_share(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1844 #ifndef OPENSSL_NO_TLS1_3
1845 unsigned int group_id
;
1847 EVP_PKEY
*ckey
= s
->s3
.tmp
.pkey
, *skey
= NULL
;
1850 if (ckey
== NULL
|| s
->s3
.peer_tmp
!= NULL
) {
1851 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1852 ERR_R_INTERNAL_ERROR
);
1856 if (!PACKET_get_net_2(pkt
, &group_id
)) {
1857 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1858 SSL_R_LENGTH_MISMATCH
);
1862 if ((context
& SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
) != 0) {
1863 const uint16_t *pgroups
= NULL
;
1864 size_t i
, num_groups
;
1866 if (PACKET_remaining(pkt
) != 0) {
1867 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1868 SSL_R_LENGTH_MISMATCH
);
1873 * It is an error if the HelloRetryRequest wants a key_share that we
1874 * already sent in the first ClientHello
1876 if (group_id
== s
->s3
.group_id
) {
1877 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1878 SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1882 /* Validate the selected group is one we support */
1883 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
1884 for (i
= 0; i
< num_groups
; i
++) {
1885 if (group_id
== pgroups
[i
])
1889 || !tls_group_allowed(s
, group_id
, SSL_SECOP_CURVE_SUPPORTED
)) {
1890 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1891 SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1895 s
->s3
.group_id
= group_id
;
1896 EVP_PKEY_free(s
->s3
.tmp
.pkey
);
1897 s
->s3
.tmp
.pkey
= NULL
;
1901 if (group_id
!= s
->s3
.group_id
) {
1903 * This isn't for the group that we sent in the original
1906 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1907 SSL_R_BAD_KEY_SHARE
);
1911 if (!PACKET_as_length_prefixed_2(pkt
, &encoded_pt
)
1912 || PACKET_remaining(&encoded_pt
) == 0) {
1913 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1914 SSL_R_LENGTH_MISMATCH
);
1918 skey
= EVP_PKEY_new();
1919 if (skey
== NULL
|| EVP_PKEY_copy_parameters(skey
, ckey
) <= 0) {
1920 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1921 ERR_R_MALLOC_FAILURE
);
1926 * TODO(3.0) Remove this when EVP_PKEY_get1_tls_encodedpoint()
1927 * knows how to get a key from an encoded point with the help of
1928 * a OSSL_SERIALIZER deserializer. We know that EVP_PKEY_get0()
1929 * downgrades an EVP_PKEY to contain a legacy key.
1933 EVP_PKEY_get0(skey
);
1934 if (EVP_PKEY_id(skey
) == EVP_PKEY_NONE
) {
1935 EVP_PKEY_free(skey
);
1936 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1937 ERR_R_INTERNAL_ERROR
);
1941 if (!EVP_PKEY_set1_tls_encodedpoint(skey
, PACKET_data(&encoded_pt
),
1942 PACKET_remaining(&encoded_pt
))) {
1943 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1945 EVP_PKEY_free(skey
);
1949 if (ssl_derive(s
, ckey
, skey
, 1) == 0) {
1950 /* SSLfatal() already called */
1951 EVP_PKEY_free(skey
);
1954 s
->s3
.peer_tmp
= skey
;
1960 int tls_parse_stoc_cookie(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1965 if (!PACKET_as_length_prefixed_2(pkt
, &cookie
)
1966 || !PACKET_memdup(&cookie
, &s
->ext
.tls13_cookie
,
1967 &s
->ext
.tls13_cookie_len
)) {
1968 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_COOKIE
,
1969 SSL_R_LENGTH_MISMATCH
);
1976 int tls_parse_stoc_early_data(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1977 X509
*x
, size_t chainidx
)
1979 if (context
== SSL_EXT_TLS1_3_NEW_SESSION_TICKET
) {
1980 unsigned long max_early_data
;
1982 if (!PACKET_get_net_4(pkt
, &max_early_data
)
1983 || PACKET_remaining(pkt
) != 0) {
1984 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1985 SSL_R_INVALID_MAX_EARLY_DATA
);
1989 s
->session
->ext
.max_early_data
= max_early_data
;
1994 if (PACKET_remaining(pkt
) != 0) {
1995 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1996 SSL_R_BAD_EXTENSION
);
2000 if (!s
->ext
.early_data_ok
2003 * If we get here then we didn't send early data, or we didn't resume
2004 * using the first identity, or the SNI/ALPN is not consistent so the
2005 * server should not be accepting it.
2007 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
2008 SSL_R_BAD_EXTENSION
);
2012 s
->ext
.early_data
= SSL_EARLY_DATA_ACCEPTED
;
2017 int tls_parse_stoc_psk(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
2020 #ifndef OPENSSL_NO_TLS1_3
2021 unsigned int identity
;
2023 if (!PACKET_get_net_2(pkt
, &identity
) || PACKET_remaining(pkt
) != 0) {
2024 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_PSK
,
2025 SSL_R_LENGTH_MISMATCH
);
2029 if (identity
>= (unsigned int)s
->ext
.tick_identity
) {
2030 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_PSK
,
2031 SSL_R_BAD_PSK_IDENTITY
);
2036 * Session resumption tickets are always sent before PSK tickets. If the
2037 * ticket index is 0 then it must be for a session resumption ticket if we
2038 * sent two tickets, or if we didn't send a PSK ticket.
2040 if (identity
== 0 && (s
->psksession
== NULL
|| s
->ext
.tick_identity
== 2)) {
2042 SSL_SESSION_free(s
->psksession
);
2043 s
->psksession
= NULL
;
2047 if (s
->psksession
== NULL
) {
2048 /* Should never happen */
2049 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_PSK
,
2050 ERR_R_INTERNAL_ERROR
);
2055 * If we used the external PSK for sending early_data then s->early_secret
2056 * is already set up, so don't overwrite it. Otherwise we copy the
2057 * early_secret across that we generated earlier.
2059 if ((s
->early_data_state
!= SSL_EARLY_DATA_WRITE_RETRY
2060 && s
->early_data_state
!= SSL_EARLY_DATA_FINISHED_WRITING
)
2061 || s
->session
->ext
.max_early_data
> 0
2062 || s
->psksession
->ext
.max_early_data
== 0)
2063 memcpy(s
->early_secret
, s
->psksession
->early_secret
, EVP_MAX_MD_SIZE
);
2065 SSL_SESSION_free(s
->session
);
2066 s
->session
= s
->psksession
;
2067 s
->psksession
= NULL
;
2069 /* Early data is only allowed if we used the first ticket */
2071 s
->ext
.early_data_ok
= 0;