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 DEFINE_STACK_OF(OCSP_RESPID
)
17 EXT_RETURN
tls_construct_ctos_renegotiate(SSL
*s
, WPACKET
*pkt
,
18 unsigned int context
, X509
*x
,
21 /* Add RI if renegotiating */
23 return EXT_RETURN_NOT_SENT
;
25 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_renegotiate
)
26 || !WPACKET_start_sub_packet_u16(pkt
)
27 || !WPACKET_sub_memcpy_u8(pkt
, s
->s3
.previous_client_finished
,
28 s
->s3
.previous_client_finished_len
)
29 || !WPACKET_close(pkt
)) {
30 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE
,
31 ERR_R_INTERNAL_ERROR
);
32 return EXT_RETURN_FAIL
;
35 return EXT_RETURN_SENT
;
38 EXT_RETURN
tls_construct_ctos_server_name(SSL
*s
, WPACKET
*pkt
,
39 unsigned int context
, X509
*x
,
42 if (s
->ext
.hostname
== NULL
)
43 return EXT_RETURN_NOT_SENT
;
45 /* Add TLS extension servername to the Client Hello message */
46 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_server_name
)
47 /* Sub-packet for server_name extension */
48 || !WPACKET_start_sub_packet_u16(pkt
)
49 /* Sub-packet for servername list (always 1 hostname)*/
50 || !WPACKET_start_sub_packet_u16(pkt
)
51 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_NAMETYPE_host_name
)
52 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.hostname
,
53 strlen(s
->ext
.hostname
))
54 || !WPACKET_close(pkt
)
55 || !WPACKET_close(pkt
)) {
56 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME
,
57 ERR_R_INTERNAL_ERROR
);
58 return EXT_RETURN_FAIL
;
61 return EXT_RETURN_SENT
;
64 /* Push a Max Fragment Len extension into ClientHello */
65 EXT_RETURN
tls_construct_ctos_maxfragmentlen(SSL
*s
, WPACKET
*pkt
,
66 unsigned int context
, X509
*x
,
69 if (s
->ext
.max_fragment_len_mode
== TLSEXT_max_fragment_length_DISABLED
)
70 return EXT_RETURN_NOT_SENT
;
72 /* Add Max Fragment Length extension if client enabled it. */
74 * 4 bytes for this extension type and extension length
75 * 1 byte for the Max Fragment Length code value.
77 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_max_fragment_length
)
78 /* Sub-packet for Max Fragment Length extension (1 byte) */
79 || !WPACKET_start_sub_packet_u16(pkt
)
80 || !WPACKET_put_bytes_u8(pkt
, s
->ext
.max_fragment_len_mode
)
81 || !WPACKET_close(pkt
)) {
82 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
83 SSL_F_TLS_CONSTRUCT_CTOS_MAXFRAGMENTLEN
, ERR_R_INTERNAL_ERROR
);
84 return EXT_RETURN_FAIL
;
87 return EXT_RETURN_SENT
;
90 #ifndef OPENSSL_NO_SRP
91 EXT_RETURN
tls_construct_ctos_srp(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
92 X509
*x
, size_t chainidx
)
94 /* Add SRP username if there is one */
95 if (s
->srp_ctx
.login
== NULL
)
96 return EXT_RETURN_NOT_SENT
;
98 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_srp
)
99 /* Sub-packet for SRP extension */
100 || !WPACKET_start_sub_packet_u16(pkt
)
101 || !WPACKET_start_sub_packet_u8(pkt
)
102 /* login must not be zero...internal error if so */
103 || !WPACKET_set_flags(pkt
, WPACKET_FLAGS_NON_ZERO_LENGTH
)
104 || !WPACKET_memcpy(pkt
, s
->srp_ctx
.login
,
105 strlen(s
->srp_ctx
.login
))
106 || !WPACKET_close(pkt
)
107 || !WPACKET_close(pkt
)) {
108 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SRP
,
109 ERR_R_INTERNAL_ERROR
);
110 return EXT_RETURN_FAIL
;
113 return EXT_RETURN_SENT
;
117 #ifndef OPENSSL_NO_EC
118 static int use_ecc(SSL
*s
, int min_version
, int max_version
)
121 unsigned long alg_k
, alg_a
;
122 STACK_OF(SSL_CIPHER
) *cipher_stack
= NULL
;
123 const uint16_t *pgroups
= NULL
;
124 size_t num_groups
, j
;
126 /* See if we support any ECC ciphersuites */
127 if (s
->version
== SSL3_VERSION
)
130 cipher_stack
= SSL_get1_supported_ciphers(s
);
131 end
= sk_SSL_CIPHER_num(cipher_stack
);
132 for (i
= 0; i
< end
; i
++) {
133 const SSL_CIPHER
*c
= sk_SSL_CIPHER_value(cipher_stack
, i
);
135 alg_k
= c
->algorithm_mkey
;
136 alg_a
= c
->algorithm_auth
;
137 if ((alg_k
& (SSL_kECDHE
| SSL_kECDHEPSK
))
138 || (alg_a
& SSL_aECDSA
)
139 || c
->min_tls
>= TLS1_3_VERSION
) {
144 sk_SSL_CIPHER_free(cipher_stack
);
148 /* Check we have at least one EC supported group */
149 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
150 for (j
= 0; j
< num_groups
; j
++) {
151 uint16_t ctmp
= pgroups
[j
];
153 if (tls_valid_group(s
, ctmp
, min_version
, max_version
)
154 && tls_group_allowed(s
, ctmp
, SSL_SECOP_CURVE_SUPPORTED
))
161 EXT_RETURN
tls_construct_ctos_ec_pt_formats(SSL
*s
, WPACKET
*pkt
,
162 unsigned int context
, X509
*x
,
165 const unsigned char *pformats
;
167 int reason
, min_version
, max_version
;
169 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
, NULL
);
171 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
172 SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS
, reason
);
173 return EXT_RETURN_FAIL
;
175 if (!use_ecc(s
, min_version
, max_version
))
176 return EXT_RETURN_NOT_SENT
;
178 /* Add TLS extension ECPointFormats to the ClientHello message */
179 tls1_get_formatlist(s
, &pformats
, &num_formats
);
181 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_ec_point_formats
)
182 /* Sub-packet for formats extension */
183 || !WPACKET_start_sub_packet_u16(pkt
)
184 || !WPACKET_sub_memcpy_u8(pkt
, pformats
, num_formats
)
185 || !WPACKET_close(pkt
)) {
186 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
187 SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
188 return EXT_RETURN_FAIL
;
191 return EXT_RETURN_SENT
;
195 #if !defined(OPENSSL_NO_DH) || !defined(OPENSSL_NO_EC)
196 EXT_RETURN
tls_construct_ctos_supported_groups(SSL
*s
, WPACKET
*pkt
,
197 unsigned int context
, X509
*x
,
200 const uint16_t *pgroups
= NULL
;
201 size_t num_groups
= 0, i
;
202 int min_version
, max_version
, reason
;
204 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
, NULL
);
206 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
207 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
, reason
);
208 return EXT_RETURN_FAIL
;
211 #if defined(OPENSSL_NO_EC)
212 if (SSL_IS_DTLS(s
) || max_version
< TLS1_3_VERSION
)
213 return EXT_RETURN_NOT_SENT
;
215 if (!use_ecc(s
, min_version
, max_version
) && max_version
< TLS1_3_VERSION
)
216 return EXT_RETURN_NOT_SENT
;
220 * Add TLS extension supported_groups to the ClientHello message
222 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
224 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_groups
)
225 /* Sub-packet for supported_groups extension */
226 || !WPACKET_start_sub_packet_u16(pkt
)
227 || !WPACKET_start_sub_packet_u16(pkt
)
228 || !WPACKET_set_flags(pkt
, WPACKET_FLAGS_NON_ZERO_LENGTH
)) {
229 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
230 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
231 ERR_R_INTERNAL_ERROR
);
232 return EXT_RETURN_FAIL
;
234 /* Copy group ID if supported */
235 for (i
= 0; i
< num_groups
; i
++) {
236 uint16_t ctmp
= pgroups
[i
];
238 if (tls_valid_group(s
, ctmp
, min_version
, max_version
)
239 && tls_group_allowed(s
, ctmp
, SSL_SECOP_CURVE_SUPPORTED
)) {
240 if (!WPACKET_put_bytes_u16(pkt
, ctmp
)) {
241 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
242 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
243 ERR_R_INTERNAL_ERROR
);
244 return EXT_RETURN_FAIL
;
248 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
249 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
250 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
251 ERR_R_INTERNAL_ERROR
);
252 return EXT_RETURN_FAIL
;
255 return EXT_RETURN_SENT
;
259 EXT_RETURN
tls_construct_ctos_session_ticket(SSL
*s
, WPACKET
*pkt
,
260 unsigned int context
, X509
*x
,
265 if (!tls_use_ticket(s
))
266 return EXT_RETURN_NOT_SENT
;
268 if (!s
->new_session
&& s
->session
!= NULL
269 && s
->session
->ext
.tick
!= NULL
270 && s
->session
->ssl_version
!= TLS1_3_VERSION
) {
271 ticklen
= s
->session
->ext
.ticklen
;
272 } else if (s
->session
&& s
->ext
.session_ticket
!= NULL
273 && s
->ext
.session_ticket
->data
!= NULL
) {
274 ticklen
= s
->ext
.session_ticket
->length
;
275 s
->session
->ext
.tick
= OPENSSL_malloc(ticklen
);
276 if (s
->session
->ext
.tick
== NULL
) {
277 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
278 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
,
279 ERR_R_INTERNAL_ERROR
);
280 return EXT_RETURN_FAIL
;
282 memcpy(s
->session
->ext
.tick
,
283 s
->ext
.session_ticket
->data
, ticklen
);
284 s
->session
->ext
.ticklen
= ticklen
;
289 if (ticklen
== 0 && s
->ext
.session_ticket
!= NULL
&&
290 s
->ext
.session_ticket
->data
== NULL
)
291 return EXT_RETURN_NOT_SENT
;
293 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_session_ticket
)
294 || !WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
, ticklen
)) {
295 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
296 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
, ERR_R_INTERNAL_ERROR
);
297 return EXT_RETURN_FAIL
;
300 return EXT_RETURN_SENT
;
303 EXT_RETURN
tls_construct_ctos_sig_algs(SSL
*s
, WPACKET
*pkt
,
304 unsigned int context
, X509
*x
,
308 const uint16_t *salg
;
310 if (!SSL_CLIENT_USE_SIGALGS(s
))
311 return EXT_RETURN_NOT_SENT
;
313 salglen
= tls12_get_psigalgs(s
, 1, &salg
);
314 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signature_algorithms
)
315 /* Sub-packet for sig-algs extension */
316 || !WPACKET_start_sub_packet_u16(pkt
)
317 /* Sub-packet for the actual list */
318 || !WPACKET_start_sub_packet_u16(pkt
)
319 || !tls12_copy_sigalgs(s
, pkt
, salg
, salglen
)
320 || !WPACKET_close(pkt
)
321 || !WPACKET_close(pkt
)) {
322 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS
,
323 ERR_R_INTERNAL_ERROR
);
324 return EXT_RETURN_FAIL
;
327 return EXT_RETURN_SENT
;
330 #ifndef OPENSSL_NO_OCSP
331 EXT_RETURN
tls_construct_ctos_status_request(SSL
*s
, WPACKET
*pkt
,
332 unsigned int context
, X509
*x
,
337 /* This extension isn't defined for client Certificates */
339 return EXT_RETURN_NOT_SENT
;
341 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
)
342 return EXT_RETURN_NOT_SENT
;
344 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_status_request
)
345 /* Sub-packet for status request extension */
346 || !WPACKET_start_sub_packet_u16(pkt
)
347 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_STATUSTYPE_ocsp
)
348 /* Sub-packet for the ids */
349 || !WPACKET_start_sub_packet_u16(pkt
)) {
350 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
351 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
352 return EXT_RETURN_FAIL
;
354 for (i
= 0; i
< sk_OCSP_RESPID_num(s
->ext
.ocsp
.ids
); i
++) {
355 unsigned char *idbytes
;
356 OCSP_RESPID
*id
= sk_OCSP_RESPID_value(s
->ext
.ocsp
.ids
, i
);
357 int idlen
= i2d_OCSP_RESPID(id
, NULL
);
360 /* Sub-packet for an individual id */
361 || !WPACKET_sub_allocate_bytes_u16(pkt
, idlen
, &idbytes
)
362 || i2d_OCSP_RESPID(id
, &idbytes
) != idlen
) {
363 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
364 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
365 ERR_R_INTERNAL_ERROR
);
366 return EXT_RETURN_FAIL
;
369 if (!WPACKET_close(pkt
)
370 || !WPACKET_start_sub_packet_u16(pkt
)) {
371 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
372 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
373 return EXT_RETURN_FAIL
;
375 if (s
->ext
.ocsp
.exts
) {
376 unsigned char *extbytes
;
377 int extlen
= i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, NULL
);
380 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
381 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
382 ERR_R_INTERNAL_ERROR
);
383 return EXT_RETURN_FAIL
;
385 if (!WPACKET_allocate_bytes(pkt
, extlen
, &extbytes
)
386 || i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, &extbytes
)
388 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
389 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
390 ERR_R_INTERNAL_ERROR
);
391 return EXT_RETURN_FAIL
;
394 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
395 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
396 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
397 return EXT_RETURN_FAIL
;
400 return EXT_RETURN_SENT
;
404 #ifndef OPENSSL_NO_NEXTPROTONEG
405 EXT_RETURN
tls_construct_ctos_npn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
406 X509
*x
, size_t chainidx
)
408 if (s
->ctx
->ext
.npn_select_cb
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
409 return EXT_RETURN_NOT_SENT
;
412 * The client advertises an empty extension to indicate its support
413 * for Next Protocol Negotiation
415 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_next_proto_neg
)
416 || !WPACKET_put_bytes_u16(pkt
, 0)) {
417 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_NPN
,
418 ERR_R_INTERNAL_ERROR
);
419 return EXT_RETURN_FAIL
;
422 return EXT_RETURN_SENT
;
426 EXT_RETURN
tls_construct_ctos_alpn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
427 X509
*x
, size_t chainidx
)
431 if (s
->ext
.alpn
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
432 return EXT_RETURN_NOT_SENT
;
434 if (!WPACKET_put_bytes_u16(pkt
,
435 TLSEXT_TYPE_application_layer_protocol_negotiation
)
436 /* Sub-packet ALPN extension */
437 || !WPACKET_start_sub_packet_u16(pkt
)
438 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.alpn
, s
->ext
.alpn_len
)
439 || !WPACKET_close(pkt
)) {
440 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_ALPN
,
441 ERR_R_INTERNAL_ERROR
);
442 return EXT_RETURN_FAIL
;
446 return EXT_RETURN_SENT
;
450 #ifndef OPENSSL_NO_SRTP
451 EXT_RETURN
tls_construct_ctos_use_srtp(SSL
*s
, WPACKET
*pkt
,
452 unsigned int context
, X509
*x
,
455 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
= SSL_get_srtp_profiles(s
);
459 return EXT_RETURN_NOT_SENT
;
461 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_use_srtp
)
462 /* Sub-packet for SRTP extension */
463 || !WPACKET_start_sub_packet_u16(pkt
)
464 /* Sub-packet for the protection profile list */
465 || !WPACKET_start_sub_packet_u16(pkt
)) {
466 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
,
467 ERR_R_INTERNAL_ERROR
);
468 return EXT_RETURN_FAIL
;
471 end
= sk_SRTP_PROTECTION_PROFILE_num(clnt
);
472 for (i
= 0; i
< end
; i
++) {
473 const SRTP_PROTECTION_PROFILE
*prof
=
474 sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
476 if (prof
== NULL
|| !WPACKET_put_bytes_u16(pkt
, prof
->id
)) {
477 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
478 SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
, ERR_R_INTERNAL_ERROR
);
479 return EXT_RETURN_FAIL
;
482 if (!WPACKET_close(pkt
)
483 /* Add an empty use_mki value */
484 || !WPACKET_put_bytes_u8(pkt
, 0)
485 || !WPACKET_close(pkt
)) {
486 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
,
487 ERR_R_INTERNAL_ERROR
);
488 return EXT_RETURN_FAIL
;
491 return EXT_RETURN_SENT
;
495 EXT_RETURN
tls_construct_ctos_etm(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
496 X509
*x
, size_t chainidx
)
498 if (s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
499 return EXT_RETURN_NOT_SENT
;
501 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_encrypt_then_mac
)
502 || !WPACKET_put_bytes_u16(pkt
, 0)) {
503 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_ETM
,
504 ERR_R_INTERNAL_ERROR
);
505 return EXT_RETURN_FAIL
;
508 return EXT_RETURN_SENT
;
511 #ifndef OPENSSL_NO_CT
512 EXT_RETURN
tls_construct_ctos_sct(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
513 X509
*x
, size_t chainidx
)
515 if (s
->ct_validation_callback
== NULL
)
516 return EXT_RETURN_NOT_SENT
;
518 /* Not defined for client Certificates */
520 return EXT_RETURN_NOT_SENT
;
522 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signed_certificate_timestamp
)
523 || !WPACKET_put_bytes_u16(pkt
, 0)) {
524 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SCT
,
525 ERR_R_INTERNAL_ERROR
);
526 return EXT_RETURN_FAIL
;
529 return EXT_RETURN_SENT
;
533 EXT_RETURN
tls_construct_ctos_ems(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
534 X509
*x
, size_t chainidx
)
536 if (s
->options
& SSL_OP_NO_EXTENDED_MASTER_SECRET
)
537 return EXT_RETURN_NOT_SENT
;
539 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_extended_master_secret
)
540 || !WPACKET_put_bytes_u16(pkt
, 0)) {
541 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EMS
,
542 ERR_R_INTERNAL_ERROR
);
543 return EXT_RETURN_FAIL
;
546 return EXT_RETURN_SENT
;
549 EXT_RETURN
tls_construct_ctos_supported_versions(SSL
*s
, WPACKET
*pkt
,
550 unsigned int context
, X509
*x
,
553 int currv
, min_version
, max_version
, reason
;
555 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
, NULL
);
557 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
558 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
, reason
);
559 return EXT_RETURN_FAIL
;
563 * Don't include this if we can't negotiate TLSv1.3. We can do a straight
564 * comparison here because we will never be called in DTLS.
566 if (max_version
< TLS1_3_VERSION
)
567 return EXT_RETURN_NOT_SENT
;
569 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_versions
)
570 || !WPACKET_start_sub_packet_u16(pkt
)
571 || !WPACKET_start_sub_packet_u8(pkt
)) {
572 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
573 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
574 ERR_R_INTERNAL_ERROR
);
575 return EXT_RETURN_FAIL
;
578 for (currv
= max_version
; currv
>= min_version
; currv
--) {
579 if (!WPACKET_put_bytes_u16(pkt
, currv
)) {
580 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
581 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
582 ERR_R_INTERNAL_ERROR
);
583 return EXT_RETURN_FAIL
;
586 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
587 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
588 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
589 ERR_R_INTERNAL_ERROR
);
590 return EXT_RETURN_FAIL
;
593 return EXT_RETURN_SENT
;
597 * Construct a psk_kex_modes extension.
599 EXT_RETURN
tls_construct_ctos_psk_kex_modes(SSL
*s
, WPACKET
*pkt
,
600 unsigned int context
, X509
*x
,
603 #ifndef OPENSSL_NO_TLS1_3
604 int nodhe
= s
->options
& SSL_OP_ALLOW_NO_DHE_KEX
;
606 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk_kex_modes
)
607 || !WPACKET_start_sub_packet_u16(pkt
)
608 || !WPACKET_start_sub_packet_u8(pkt
)
609 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE_DHE
)
610 || (nodhe
&& !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE
))
611 || !WPACKET_close(pkt
)
612 || !WPACKET_close(pkt
)) {
613 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
614 SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES
, ERR_R_INTERNAL_ERROR
);
615 return EXT_RETURN_FAIL
;
618 s
->ext
.psk_kex_mode
= TLSEXT_KEX_MODE_FLAG_KE_DHE
;
620 s
->ext
.psk_kex_mode
|= TLSEXT_KEX_MODE_FLAG_KE
;
623 return EXT_RETURN_SENT
;
626 #ifndef OPENSSL_NO_TLS1_3
627 static int add_key_share(SSL
*s
, WPACKET
*pkt
, unsigned int curve_id
)
629 unsigned char *encoded_point
= NULL
;
630 EVP_PKEY
*key_share_key
= NULL
;
633 if (s
->s3
.tmp
.pkey
!= NULL
) {
634 if (!ossl_assert(s
->hello_retry_request
== SSL_HRR_PENDING
)) {
635 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
,
636 ERR_R_INTERNAL_ERROR
);
640 * Could happen if we got an HRR that wasn't requesting a new key_share
642 key_share_key
= s
->s3
.tmp
.pkey
;
644 key_share_key
= ssl_generate_pkey_group(s
, curve_id
);
645 if (key_share_key
== NULL
) {
646 /* SSLfatal() already called */
651 /* Encode the public key. */
652 encodedlen
= EVP_PKEY_get1_tls_encodedpoint(key_share_key
,
654 if (encodedlen
== 0) {
655 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
, ERR_R_EC_LIB
);
659 /* Create KeyShareEntry */
660 if (!WPACKET_put_bytes_u16(pkt
, curve_id
)
661 || !WPACKET_sub_memcpy_u16(pkt
, encoded_point
, encodedlen
)) {
662 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
,
663 ERR_R_INTERNAL_ERROR
);
668 * TODO(TLS1.3): When changing to send more than one key_share we're
669 * going to need to be able to save more than one EVP_PKEY. For now
670 * we reuse the existing tmp.pkey
672 s
->s3
.tmp
.pkey
= key_share_key
;
673 s
->s3
.group_id
= curve_id
;
674 OPENSSL_free(encoded_point
);
678 if (s
->s3
.tmp
.pkey
== NULL
)
679 EVP_PKEY_free(key_share_key
);
680 OPENSSL_free(encoded_point
);
685 EXT_RETURN
tls_construct_ctos_key_share(SSL
*s
, WPACKET
*pkt
,
686 unsigned int context
, X509
*x
,
689 #ifndef OPENSSL_NO_TLS1_3
690 size_t i
, num_groups
= 0;
691 const uint16_t *pgroups
= NULL
;
692 uint16_t curve_id
= 0;
694 /* key_share extension */
695 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_key_share
)
696 /* Extension data sub-packet */
697 || !WPACKET_start_sub_packet_u16(pkt
)
698 /* KeyShare list sub-packet */
699 || !WPACKET_start_sub_packet_u16(pkt
)) {
700 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
701 ERR_R_INTERNAL_ERROR
);
702 return EXT_RETURN_FAIL
;
705 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
708 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
711 if (s
->s3
.group_id
!= 0) {
712 curve_id
= s
->s3
.group_id
;
714 for (i
= 0; i
< num_groups
; i
++) {
716 if (!tls_group_allowed(s
, pgroups
[i
], SSL_SECOP_CURVE_SUPPORTED
))
719 curve_id
= pgroups
[i
];
725 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
726 SSL_R_NO_SUITABLE_KEY_SHARE
);
727 return EXT_RETURN_FAIL
;
730 if (!add_key_share(s
, pkt
, curve_id
)) {
731 /* SSLfatal() already called */
732 return EXT_RETURN_FAIL
;
735 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
736 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
737 ERR_R_INTERNAL_ERROR
);
738 return EXT_RETURN_FAIL
;
740 return EXT_RETURN_SENT
;
742 return EXT_RETURN_NOT_SENT
;
746 EXT_RETURN
tls_construct_ctos_cookie(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
747 X509
*x
, size_t chainidx
)
749 EXT_RETURN ret
= EXT_RETURN_FAIL
;
751 /* Should only be set if we've had an HRR */
752 if (s
->ext
.tls13_cookie_len
== 0)
753 return EXT_RETURN_NOT_SENT
;
755 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_cookie
)
756 /* Extension data sub-packet */
757 || !WPACKET_start_sub_packet_u16(pkt
)
758 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.tls13_cookie
,
759 s
->ext
.tls13_cookie_len
)
760 || !WPACKET_close(pkt
)) {
761 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_COOKIE
,
762 ERR_R_INTERNAL_ERROR
);
766 ret
= EXT_RETURN_SENT
;
768 OPENSSL_free(s
->ext
.tls13_cookie
);
769 s
->ext
.tls13_cookie
= NULL
;
770 s
->ext
.tls13_cookie_len
= 0;
775 EXT_RETURN
tls_construct_ctos_early_data(SSL
*s
, WPACKET
*pkt
,
776 unsigned int context
, X509
*x
,
779 #ifndef OPENSSL_NO_PSK
780 char identity
[PSK_MAX_IDENTITY_LEN
+ 1];
781 #endif /* OPENSSL_NO_PSK */
782 const unsigned char *id
= NULL
;
784 SSL_SESSION
*psksess
= NULL
;
785 SSL_SESSION
*edsess
= NULL
;
786 const EVP_MD
*handmd
= NULL
;
788 if (s
->hello_retry_request
== SSL_HRR_PENDING
)
789 handmd
= ssl_handshake_md(s
);
791 if (s
->psk_use_session_cb
!= NULL
792 && (!s
->psk_use_session_cb(s
, handmd
, &id
, &idlen
, &psksess
)
794 && psksess
->ssl_version
!= TLS1_3_VERSION
))) {
795 SSL_SESSION_free(psksess
);
796 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
798 return EXT_RETURN_FAIL
;
801 #ifndef OPENSSL_NO_PSK
802 if (psksess
== NULL
&& s
->psk_client_callback
!= NULL
) {
803 unsigned char psk
[PSK_MAX_PSK_LEN
];
806 memset(identity
, 0, sizeof(identity
));
807 psklen
= s
->psk_client_callback(s
, NULL
, identity
, sizeof(identity
) - 1,
810 if (psklen
> PSK_MAX_PSK_LEN
) {
811 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
,
812 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
813 return EXT_RETURN_FAIL
;
814 } else if (psklen
> 0) {
815 const unsigned char tls13_aes128gcmsha256_id
[] = { 0x13, 0x01 };
816 const SSL_CIPHER
*cipher
;
818 idlen
= strlen(identity
);
819 if (idlen
> PSK_MAX_IDENTITY_LEN
) {
820 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
821 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
822 ERR_R_INTERNAL_ERROR
);
823 return EXT_RETURN_FAIL
;
825 id
= (unsigned char *)identity
;
828 * We found a PSK using an old style callback. We don't know
829 * the digest so we default to SHA256 as per the TLSv1.3 spec
831 cipher
= SSL_CIPHER_find(s
, tls13_aes128gcmsha256_id
);
832 if (cipher
== NULL
) {
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
;
839 psksess
= SSL_SESSION_new();
841 || !SSL_SESSION_set1_master_key(psksess
, psk
, psklen
)
842 || !SSL_SESSION_set_cipher(psksess
, cipher
)
843 || !SSL_SESSION_set_protocol_version(psksess
, TLS1_3_VERSION
)) {
844 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
845 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
846 ERR_R_INTERNAL_ERROR
);
847 OPENSSL_cleanse(psk
, psklen
);
848 return EXT_RETURN_FAIL
;
850 OPENSSL_cleanse(psk
, psklen
);
853 #endif /* OPENSSL_NO_PSK */
855 SSL_SESSION_free(s
->psksession
);
856 s
->psksession
= psksess
;
857 if (psksess
!= NULL
) {
858 OPENSSL_free(s
->psksession_id
);
859 s
->psksession_id
= OPENSSL_memdup(id
, idlen
);
860 if (s
->psksession_id
== NULL
) {
861 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
862 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
863 return EXT_RETURN_FAIL
;
865 s
->psksession_id_len
= idlen
;
868 if (s
->early_data_state
!= SSL_EARLY_DATA_CONNECTING
869 || (s
->session
->ext
.max_early_data
== 0
870 && (psksess
== NULL
|| psksess
->ext
.max_early_data
== 0))) {
871 s
->max_early_data
= 0;
872 return EXT_RETURN_NOT_SENT
;
874 edsess
= s
->session
->ext
.max_early_data
!= 0 ? s
->session
: psksess
;
875 s
->max_early_data
= edsess
->ext
.max_early_data
;
877 if (edsess
->ext
.hostname
!= NULL
) {
878 if (s
->ext
.hostname
== NULL
879 || (s
->ext
.hostname
!= NULL
880 && strcmp(s
->ext
.hostname
, edsess
->ext
.hostname
) != 0)) {
881 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
882 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
883 SSL_R_INCONSISTENT_EARLY_DATA_SNI
);
884 return EXT_RETURN_FAIL
;
888 if ((s
->ext
.alpn
== NULL
&& edsess
->ext
.alpn_selected
!= NULL
)) {
889 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
890 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
891 return EXT_RETURN_FAIL
;
895 * Verify that we are offering an ALPN protocol consistent with the early
898 if (edsess
->ext
.alpn_selected
!= NULL
) {
899 PACKET prots
, alpnpkt
;
902 if (!PACKET_buf_init(&prots
, s
->ext
.alpn
, s
->ext
.alpn_len
)) {
903 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
904 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
905 return EXT_RETURN_FAIL
;
907 while (PACKET_get_length_prefixed_1(&prots
, &alpnpkt
)) {
908 if (PACKET_equal(&alpnpkt
, edsess
->ext
.alpn_selected
,
909 edsess
->ext
.alpn_selected_len
)) {
915 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
916 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
917 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
918 return EXT_RETURN_FAIL
;
922 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_early_data
)
923 || !WPACKET_start_sub_packet_u16(pkt
)
924 || !WPACKET_close(pkt
)) {
925 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
926 ERR_R_INTERNAL_ERROR
);
927 return EXT_RETURN_FAIL
;
931 * We set this to rejected here. Later, if the server acknowledges the
932 * extension, we set it to accepted.
934 s
->ext
.early_data
= SSL_EARLY_DATA_REJECTED
;
935 s
->ext
.early_data_ok
= 1;
937 return EXT_RETURN_SENT
;
940 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
941 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
944 * PSK pre binder overhead =
945 * 2 bytes for TLSEXT_TYPE_psk
946 * 2 bytes for extension length
947 * 2 bytes for identities list length
948 * 2 bytes for identity length
949 * 4 bytes for obfuscated_ticket_age
950 * 2 bytes for binder list length
951 * 1 byte for binder length
952 * The above excludes the number of bytes for the identity itself and the
953 * subsequent binder bytes
955 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
957 EXT_RETURN
tls_construct_ctos_padding(SSL
*s
, WPACKET
*pkt
,
958 unsigned int context
, X509
*x
,
961 unsigned char *padbytes
;
964 if ((s
->options
& SSL_OP_TLSEXT_PADDING
) == 0)
965 return EXT_RETURN_NOT_SENT
;
968 * Add padding to workaround bugs in F5 terminators. See RFC7685.
969 * This code calculates the length of all extensions added so far but
970 * excludes the PSK extension (because that MUST be written last). Therefore
971 * this extension MUST always appear second to last.
973 if (!WPACKET_get_total_written(pkt
, &hlen
)) {
974 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PADDING
,
975 ERR_R_INTERNAL_ERROR
);
976 return EXT_RETURN_FAIL
;
980 * If we're going to send a PSK then that will be written out after this
981 * extension, so we need to calculate how long it is going to be.
983 if (s
->session
->ssl_version
== TLS1_3_VERSION
984 && s
->session
->ext
.ticklen
!= 0
985 && s
->session
->cipher
!= NULL
) {
986 const EVP_MD
*md
= ssl_md(s
->ctx
, s
->session
->cipher
->algorithm2
);
990 * Add the fixed PSK overhead, the identity length and the binder
993 hlen
+= PSK_PRE_BINDER_OVERHEAD
+ s
->session
->ext
.ticklen
998 if (hlen
> F5_WORKAROUND_MIN_MSG_LEN
&& hlen
< F5_WORKAROUND_MAX_MSG_LEN
) {
999 /* Calculate the amount of padding we need to add */
1000 hlen
= F5_WORKAROUND_MAX_MSG_LEN
- hlen
;
1003 * Take off the size of extension header itself (2 bytes for type and
1004 * 2 bytes for length bytes), but ensure that the extension is at least
1005 * 1 byte long so as not to have an empty extension last (WebSphere 7.x,
1006 * 8.x are intolerant of that condition)
1013 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_padding
)
1014 || !WPACKET_sub_allocate_bytes_u16(pkt
, hlen
, &padbytes
)) {
1015 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PADDING
,
1016 ERR_R_INTERNAL_ERROR
);
1017 return EXT_RETURN_FAIL
;
1019 memset(padbytes
, 0, hlen
);
1022 return EXT_RETURN_SENT
;
1026 * Construct the pre_shared_key extension
1028 EXT_RETURN
tls_construct_ctos_psk(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
1029 X509
*x
, size_t chainidx
)
1031 #ifndef OPENSSL_NO_TLS1_3
1032 uint32_t now
, agesec
, agems
= 0;
1033 size_t reshashsize
= 0, pskhashsize
= 0, binderoffset
, msglen
;
1034 unsigned char *resbinder
= NULL
, *pskbinder
= NULL
, *msgstart
= NULL
;
1035 const EVP_MD
*handmd
= NULL
, *mdres
= NULL
, *mdpsk
= NULL
;
1038 s
->ext
.tick_identity
= 0;
1041 * Note: At this stage of the code we only support adding a single
1042 * resumption PSK. If we add support for multiple PSKs then the length
1043 * calculations in the padding extension will need to be adjusted.
1047 * If this is an incompatible or new session then we have nothing to resume
1048 * so don't add this extension.
1050 if (s
->session
->ssl_version
!= TLS1_3_VERSION
1051 || (s
->session
->ext
.ticklen
== 0 && s
->psksession
== NULL
))
1052 return EXT_RETURN_NOT_SENT
;
1054 if (s
->hello_retry_request
== SSL_HRR_PENDING
)
1055 handmd
= ssl_handshake_md(s
);
1057 if (s
->session
->ext
.ticklen
!= 0) {
1058 /* Get the digest associated with the ciphersuite in the session */
1059 if (s
->session
->cipher
== NULL
) {
1060 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1061 ERR_R_INTERNAL_ERROR
);
1062 return EXT_RETURN_FAIL
;
1064 mdres
= ssl_md(s
->ctx
, s
->session
->cipher
->algorithm2
);
1065 if (mdres
== NULL
) {
1067 * Don't recognize this cipher so we can't use the session.
1073 if (s
->hello_retry_request
== SSL_HRR_PENDING
&& mdres
!= handmd
) {
1075 * Selected ciphersuite hash does not match the hash for the session
1076 * so we can't use it.
1082 * Technically the C standard just says time() returns a time_t and says
1083 * nothing about the encoding of that type. In practice most
1084 * implementations follow POSIX which holds it as an integral type in
1085 * seconds since epoch. We've already made the assumption that we can do
1086 * this in multiple places in the code, so portability shouldn't be an
1089 now
= (uint32_t)time(NULL
);
1090 agesec
= now
- (uint32_t)s
->session
->time
;
1092 * We calculate the age in seconds but the server may work in ms. Due to
1093 * rounding errors we could overestimate the age by up to 1s. It is
1094 * better to underestimate it. Otherwise, if the RTT is very short, when
1095 * the server calculates the age reported by the client it could be
1096 * bigger than the age calculated on the server - which should never
1102 if (s
->session
->ext
.tick_lifetime_hint
< agesec
) {
1103 /* Ticket is too old. Ignore it. */
1108 * Calculate age in ms. We're just doing it to nearest second. Should be
1111 agems
= agesec
* (uint32_t)1000;
1113 if (agesec
!= 0 && agems
/ (uint32_t)1000 != agesec
) {
1115 * Overflow. Shouldn't happen unless this is a *really* old session.
1116 * If so we just ignore it.
1122 * Obfuscate the age. Overflow here is fine, this addition is supposed
1125 agems
+= s
->session
->ext
.tick_age_add
;
1127 reshashsize
= EVP_MD_size(mdres
);
1128 s
->ext
.tick_identity
++;
1133 if (!dores
&& s
->psksession
== NULL
)
1134 return EXT_RETURN_NOT_SENT
;
1136 if (s
->psksession
!= NULL
) {
1137 mdpsk
= ssl_md(s
->ctx
, s
->psksession
->cipher
->algorithm2
);
1138 if (mdpsk
== NULL
) {
1140 * Don't recognize this cipher so we can't use the session.
1141 * If this happens it's an application bug.
1143 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1145 return EXT_RETURN_FAIL
;
1148 if (s
->hello_retry_request
== SSL_HRR_PENDING
&& mdpsk
!= handmd
) {
1150 * Selected ciphersuite hash does not match the hash for the PSK
1151 * session. This is an application bug.
1153 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1155 return EXT_RETURN_FAIL
;
1158 pskhashsize
= EVP_MD_size(mdpsk
);
1161 /* Create the extension, but skip over the binder for now */
1162 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk
)
1163 || !WPACKET_start_sub_packet_u16(pkt
)
1164 || !WPACKET_start_sub_packet_u16(pkt
)) {
1165 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1166 ERR_R_INTERNAL_ERROR
);
1167 return EXT_RETURN_FAIL
;
1171 if (!WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
,
1172 s
->session
->ext
.ticklen
)
1173 || !WPACKET_put_bytes_u32(pkt
, agems
)) {
1174 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1175 ERR_R_INTERNAL_ERROR
);
1176 return EXT_RETURN_FAIL
;
1180 if (s
->psksession
!= NULL
) {
1181 if (!WPACKET_sub_memcpy_u16(pkt
, s
->psksession_id
,
1182 s
->psksession_id_len
)
1183 || !WPACKET_put_bytes_u32(pkt
, 0)) {
1184 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1185 ERR_R_INTERNAL_ERROR
);
1186 return EXT_RETURN_FAIL
;
1188 s
->ext
.tick_identity
++;
1191 if (!WPACKET_close(pkt
)
1192 || !WPACKET_get_total_written(pkt
, &binderoffset
)
1193 || !WPACKET_start_sub_packet_u16(pkt
)
1195 && !WPACKET_sub_allocate_bytes_u8(pkt
, reshashsize
, &resbinder
))
1196 || (s
->psksession
!= NULL
1197 && !WPACKET_sub_allocate_bytes_u8(pkt
, pskhashsize
, &pskbinder
))
1198 || !WPACKET_close(pkt
)
1199 || !WPACKET_close(pkt
)
1200 || !WPACKET_get_total_written(pkt
, &msglen
)
1202 * We need to fill in all the sub-packet lengths now so we can
1203 * calculate the HMAC of the message up to the binders
1205 || !WPACKET_fill_lengths(pkt
)) {
1206 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1207 ERR_R_INTERNAL_ERROR
);
1208 return EXT_RETURN_FAIL
;
1211 msgstart
= WPACKET_get_curr(pkt
) - msglen
;
1214 && tls_psk_do_binder(s
, mdres
, msgstart
, binderoffset
, NULL
,
1215 resbinder
, s
->session
, 1, 0) != 1) {
1216 /* SSLfatal() already called */
1217 return EXT_RETURN_FAIL
;
1220 if (s
->psksession
!= NULL
1221 && tls_psk_do_binder(s
, mdpsk
, msgstart
, binderoffset
, NULL
,
1222 pskbinder
, s
->psksession
, 1, 1) != 1) {
1223 /* SSLfatal() already called */
1224 return EXT_RETURN_FAIL
;
1227 return EXT_RETURN_SENT
;
1229 return EXT_RETURN_NOT_SENT
;
1233 EXT_RETURN
tls_construct_ctos_post_handshake_auth(SSL
*s
, WPACKET
*pkt
,
1234 unsigned int context
,
1235 X509
*x
, size_t chainidx
)
1237 #ifndef OPENSSL_NO_TLS1_3
1238 if (!s
->pha_enabled
)
1239 return EXT_RETURN_NOT_SENT
;
1241 /* construct extension - 0 length, no contents */
1242 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_post_handshake_auth
)
1243 || !WPACKET_start_sub_packet_u16(pkt
)
1244 || !WPACKET_close(pkt
)) {
1245 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1246 SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH
,
1247 ERR_R_INTERNAL_ERROR
);
1248 return EXT_RETURN_FAIL
;
1251 s
->post_handshake_auth
= SSL_PHA_EXT_SENT
;
1253 return EXT_RETURN_SENT
;
1255 return EXT_RETURN_NOT_SENT
;
1261 * Parse the server's renegotiation binding and abort if it's not right
1263 int tls_parse_stoc_renegotiate(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1264 X509
*x
, size_t chainidx
)
1266 size_t expected_len
= s
->s3
.previous_client_finished_len
1267 + s
->s3
.previous_server_finished_len
;
1269 const unsigned char *data
;
1271 /* Check for logic errors */
1272 if (!ossl_assert(expected_len
== 0
1273 || s
->s3
.previous_client_finished_len
!= 0)
1274 || !ossl_assert(expected_len
== 0
1275 || s
->s3
.previous_server_finished_len
!= 0)) {
1276 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1277 ERR_R_INTERNAL_ERROR
);
1281 /* Parse the length byte */
1282 if (!PACKET_get_1_len(pkt
, &ilen
)) {
1283 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1284 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1288 /* Consistency check */
1289 if (PACKET_remaining(pkt
) != ilen
) {
1290 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1291 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1295 /* Check that the extension matches */
1296 if (ilen
!= expected_len
) {
1297 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1298 SSL_R_RENEGOTIATION_MISMATCH
);
1302 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
.previous_client_finished_len
)
1303 || memcmp(data
, s
->s3
.previous_client_finished
,
1304 s
->s3
.previous_client_finished_len
) != 0) {
1305 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1306 SSL_R_RENEGOTIATION_MISMATCH
);
1310 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
.previous_server_finished_len
)
1311 || memcmp(data
, s
->s3
.previous_server_finished
,
1312 s
->s3
.previous_server_finished_len
) != 0) {
1313 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1314 SSL_R_RENEGOTIATION_MISMATCH
);
1317 s
->s3
.send_connection_binding
= 1;
1322 /* Parse the server's max fragment len extension packet */
1323 int tls_parse_stoc_maxfragmentlen(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1324 X509
*x
, size_t chainidx
)
1328 if (PACKET_remaining(pkt
) != 1 || !PACKET_get_1(pkt
, &value
)) {
1329 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1330 SSL_R_BAD_EXTENSION
);
1334 /* |value| should contains a valid max-fragment-length code. */
1335 if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value
)) {
1336 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1337 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1338 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH
);
1342 /* Must be the same value as client-configured one who was sent to server */
1344 * RFC 6066: if a client receives a maximum fragment length negotiation
1345 * response that differs from the length it requested, ...
1346 * It must abort with SSL_AD_ILLEGAL_PARAMETER alert
1348 if (value
!= s
->ext
.max_fragment_len_mode
) {
1349 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1350 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1351 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH
);
1356 * Maximum Fragment Length Negotiation succeeded.
1357 * The negotiated Maximum Fragment Length is binding now.
1359 s
->session
->ext
.max_fragment_len_mode
= value
;
1364 int tls_parse_stoc_server_name(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1365 X509
*x
, size_t chainidx
)
1367 if (s
->ext
.hostname
== NULL
) {
1368 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1369 ERR_R_INTERNAL_ERROR
);
1373 if (PACKET_remaining(pkt
) > 0) {
1374 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1375 SSL_R_BAD_EXTENSION
);
1380 if (s
->session
->ext
.hostname
!= NULL
) {
1381 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1382 ERR_R_INTERNAL_ERROR
);
1385 s
->session
->ext
.hostname
= OPENSSL_strdup(s
->ext
.hostname
);
1386 if (s
->session
->ext
.hostname
== NULL
) {
1387 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1388 ERR_R_INTERNAL_ERROR
);
1396 #ifndef OPENSSL_NO_EC
1397 int tls_parse_stoc_ec_pt_formats(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1398 X509
*x
, size_t chainidx
)
1400 size_t ecpointformats_len
;
1401 PACKET ecptformatlist
;
1403 if (!PACKET_as_length_prefixed_1(pkt
, &ecptformatlist
)) {
1404 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
,
1405 SSL_R_BAD_EXTENSION
);
1409 ecpointformats_len
= PACKET_remaining(&ecptformatlist
);
1410 if (ecpointformats_len
== 0) {
1411 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1412 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, SSL_R_BAD_LENGTH
);
1416 s
->ext
.peer_ecpointformats_len
= 0;
1417 OPENSSL_free(s
->ext
.peer_ecpointformats
);
1418 s
->ext
.peer_ecpointformats
= OPENSSL_malloc(ecpointformats_len
);
1419 if (s
->ext
.peer_ecpointformats
== NULL
) {
1420 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1421 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
1425 s
->ext
.peer_ecpointformats_len
= ecpointformats_len
;
1427 if (!PACKET_copy_bytes(&ecptformatlist
,
1428 s
->ext
.peer_ecpointformats
,
1429 ecpointformats_len
)) {
1430 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1431 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
1440 int tls_parse_stoc_session_ticket(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1441 X509
*x
, size_t chainidx
)
1443 if (s
->ext
.session_ticket_cb
!= NULL
&&
1444 !s
->ext
.session_ticket_cb(s
, PACKET_data(pkt
),
1445 PACKET_remaining(pkt
),
1446 s
->ext
.session_ticket_cb_arg
)) {
1447 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
,
1448 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1452 if (!tls_use_ticket(s
)) {
1453 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
,
1454 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1457 if (PACKET_remaining(pkt
) > 0) {
1458 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1459 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1463 s
->ext
.ticket_expected
= 1;
1468 #ifndef OPENSSL_NO_OCSP
1469 int tls_parse_stoc_status_request(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1470 X509
*x
, size_t chainidx
)
1472 if (context
== SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
) {
1473 /* We ignore this if the server sends a CertificateRequest */
1474 /* TODO(TLS1.3): Add support for this */
1479 * MUST only be sent if we've requested a status
1480 * request message. In TLS <= 1.2 it must also be empty.
1482 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
) {
1483 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
,
1484 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST
, SSL_R_BAD_EXTENSION
);
1487 if (!SSL_IS_TLS13(s
) && PACKET_remaining(pkt
) > 0) {
1488 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1489 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST
, SSL_R_BAD_EXTENSION
);
1493 if (SSL_IS_TLS13(s
)) {
1494 /* We only know how to handle this if it's for the first Certificate in
1495 * the chain. We ignore any other responses.
1500 /* SSLfatal() already called */
1501 return tls_process_cert_status_body(s
, pkt
);
1504 /* Set flag to expect CertificateStatus message */
1505 s
->ext
.status_expected
= 1;
1512 #ifndef OPENSSL_NO_CT
1513 int tls_parse_stoc_sct(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1516 if (context
== SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
) {
1517 /* We ignore this if the server sends it in a CertificateRequest */
1518 /* TODO(TLS1.3): Add support for this */
1523 * Only take it if we asked for it - i.e if there is no CT validation
1524 * callback set, then a custom extension MAY be processing it, so we
1525 * need to let control continue to flow to that.
1527 if (s
->ct_validation_callback
!= NULL
) {
1528 size_t size
= PACKET_remaining(pkt
);
1530 /* Simply copy it off for later processing */
1531 OPENSSL_free(s
->ext
.scts
);
1534 s
->ext
.scts_len
= (uint16_t)size
;
1536 s
->ext
.scts
= OPENSSL_malloc(size
);
1537 if (s
->ext
.scts
== NULL
1538 || !PACKET_copy_bytes(pkt
, s
->ext
.scts
, size
)) {
1539 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SCT
,
1540 ERR_R_INTERNAL_ERROR
);
1545 ENDPOINT role
= (context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0
1546 ? ENDPOINT_CLIENT
: ENDPOINT_BOTH
;
1549 * If we didn't ask for it then there must be a custom extension,
1550 * otherwise this is unsolicited.
1552 if (custom_ext_find(&s
->cert
->custext
, role
,
1553 TLSEXT_TYPE_signed_certificate_timestamp
,
1555 SSLfatal(s
, TLS1_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_SCT
,
1556 SSL_R_BAD_EXTENSION
);
1560 if (!custom_ext_parse(s
, context
,
1561 TLSEXT_TYPE_signed_certificate_timestamp
,
1562 PACKET_data(pkt
), PACKET_remaining(pkt
),
1564 /* SSLfatal already called */
1574 #ifndef OPENSSL_NO_NEXTPROTONEG
1576 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1577 * elements of zero length are allowed and the set of elements must exactly
1578 * fill the length of the block. Returns 1 on success or 0 on failure.
1580 static int ssl_next_proto_validate(SSL
*s
, PACKET
*pkt
)
1582 PACKET tmp_protocol
;
1584 while (PACKET_remaining(pkt
)) {
1585 if (!PACKET_get_length_prefixed_1(pkt
, &tmp_protocol
)
1586 || PACKET_remaining(&tmp_protocol
) == 0) {
1587 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_SSL_NEXT_PROTO_VALIDATE
,
1588 SSL_R_BAD_EXTENSION
);
1596 int tls_parse_stoc_npn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1599 unsigned char *selected
;
1600 unsigned char selected_len
;
1603 /* Check if we are in a renegotiation. If so ignore this extension */
1604 if (!SSL_IS_FIRST_HANDSHAKE(s
))
1607 /* We must have requested it. */
1608 if (s
->ctx
->ext
.npn_select_cb
== NULL
) {
1609 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_NPN
,
1610 SSL_R_BAD_EXTENSION
);
1614 /* The data must be valid */
1616 if (!ssl_next_proto_validate(s
, &tmppkt
)) {
1617 /* SSLfatal() already called */
1620 if (s
->ctx
->ext
.npn_select_cb(s
, &selected
, &selected_len
,
1622 PACKET_remaining(pkt
),
1623 s
->ctx
->ext
.npn_select_cb_arg
) !=
1624 SSL_TLSEXT_ERR_OK
) {
1625 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
, SSL_F_TLS_PARSE_STOC_NPN
,
1626 SSL_R_BAD_EXTENSION
);
1631 * Could be non-NULL if server has sent multiple NPN extensions in
1632 * a single Serverhello
1634 OPENSSL_free(s
->ext
.npn
);
1635 s
->ext
.npn
= OPENSSL_malloc(selected_len
);
1636 if (s
->ext
.npn
== NULL
) {
1637 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_NPN
,
1638 ERR_R_INTERNAL_ERROR
);
1642 memcpy(s
->ext
.npn
, selected
, selected_len
);
1643 s
->ext
.npn_len
= selected_len
;
1650 int tls_parse_stoc_alpn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1655 /* We must have requested it. */
1656 if (!s
->s3
.alpn_sent
) {
1657 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_ALPN
,
1658 SSL_R_BAD_EXTENSION
);
1662 * The extension data consists of:
1663 * uint16 list_length
1664 * uint8 proto_length;
1665 * uint8 proto[proto_length];
1667 if (!PACKET_get_net_2_len(pkt
, &len
)
1668 || PACKET_remaining(pkt
) != len
|| !PACKET_get_1_len(pkt
, &len
)
1669 || PACKET_remaining(pkt
) != len
) {
1670 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1671 SSL_R_BAD_EXTENSION
);
1674 OPENSSL_free(s
->s3
.alpn_selected
);
1675 s
->s3
.alpn_selected
= OPENSSL_malloc(len
);
1676 if (s
->s3
.alpn_selected
== NULL
) {
1677 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1678 ERR_R_INTERNAL_ERROR
);
1681 if (!PACKET_copy_bytes(pkt
, s
->s3
.alpn_selected
, len
)) {
1682 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1683 SSL_R_BAD_EXTENSION
);
1686 s
->s3
.alpn_selected_len
= len
;
1688 if (s
->session
->ext
.alpn_selected
== NULL
1689 || s
->session
->ext
.alpn_selected_len
!= len
1690 || memcmp(s
->session
->ext
.alpn_selected
, s
->s3
.alpn_selected
, len
)
1692 /* ALPN not consistent with the old session so cannot use early_data */
1693 s
->ext
.early_data_ok
= 0;
1697 * This is a new session and so alpn_selected should have been
1698 * initialised to NULL. We should update it with the selected ALPN.
1700 if (!ossl_assert(s
->session
->ext
.alpn_selected
== NULL
)) {
1701 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1702 ERR_R_INTERNAL_ERROR
);
1705 s
->session
->ext
.alpn_selected
=
1706 OPENSSL_memdup(s
->s3
.alpn_selected
, s
->s3
.alpn_selected_len
);
1707 if (s
->session
->ext
.alpn_selected
== NULL
) {
1708 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1709 ERR_R_INTERNAL_ERROR
);
1712 s
->session
->ext
.alpn_selected_len
= s
->s3
.alpn_selected_len
;
1718 #ifndef OPENSSL_NO_SRTP
1719 int tls_parse_stoc_use_srtp(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1722 unsigned int id
, ct
, mki
;
1724 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
;
1725 SRTP_PROTECTION_PROFILE
*prof
;
1727 if (!PACKET_get_net_2(pkt
, &ct
) || ct
!= 2
1728 || !PACKET_get_net_2(pkt
, &id
)
1729 || !PACKET_get_1(pkt
, &mki
)
1730 || PACKET_remaining(pkt
) != 0) {
1731 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1732 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1737 /* Must be no MKI, since we never offer one */
1738 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1739 SSL_R_BAD_SRTP_MKI_VALUE
);
1743 /* Throw an error if the server gave us an unsolicited extension */
1744 clnt
= SSL_get_srtp_profiles(s
);
1746 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1747 SSL_R_NO_SRTP_PROFILES
);
1752 * Check to see if the server gave us something we support (and
1753 * presumably offered)
1755 for (i
= 0; i
< sk_SRTP_PROTECTION_PROFILE_num(clnt
); i
++) {
1756 prof
= sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
1758 if (prof
->id
== id
) {
1759 s
->srtp_profile
= prof
;
1764 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1765 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1770 int tls_parse_stoc_etm(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1773 /* Ignore if inappropriate ciphersuite */
1774 if (!(s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
1775 && s
->s3
.tmp
.new_cipher
->algorithm_mac
!= SSL_AEAD
1776 && s
->s3
.tmp
.new_cipher
->algorithm_enc
!= SSL_RC4
)
1782 int tls_parse_stoc_ems(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1785 if (s
->options
& SSL_OP_NO_EXTENDED_MASTER_SECRET
)
1787 s
->s3
.flags
|= TLS1_FLAGS_RECEIVED_EXTMS
;
1789 s
->session
->flags
|= SSL_SESS_FLAG_EXTMS
;
1794 int tls_parse_stoc_supported_versions(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1795 X509
*x
, size_t chainidx
)
1797 unsigned int version
;
1799 if (!PACKET_get_net_2(pkt
, &version
)
1800 || PACKET_remaining(pkt
) != 0) {
1801 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1802 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS
,
1803 SSL_R_LENGTH_MISMATCH
);
1808 * The only protocol version we support which is valid in this extension in
1809 * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else.
1811 if (version
!= TLS1_3_VERSION
) {
1812 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1813 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS
,
1814 SSL_R_BAD_PROTOCOL_VERSION_NUMBER
);
1818 /* We ignore this extension for HRRs except to sanity check it */
1819 if (context
== SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
)
1822 /* We just set it here. We validate it in ssl_choose_client_version */
1823 s
->version
= version
;
1828 int tls_parse_stoc_key_share(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1831 #ifndef OPENSSL_NO_TLS1_3
1832 unsigned int group_id
;
1834 EVP_PKEY
*ckey
= s
->s3
.tmp
.pkey
, *skey
= NULL
;
1837 if (ckey
== NULL
|| s
->s3
.peer_tmp
!= NULL
) {
1838 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1839 ERR_R_INTERNAL_ERROR
);
1843 if (!PACKET_get_net_2(pkt
, &group_id
)) {
1844 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1845 SSL_R_LENGTH_MISMATCH
);
1849 if ((context
& SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
) != 0) {
1850 const uint16_t *pgroups
= NULL
;
1851 size_t i
, num_groups
;
1853 if (PACKET_remaining(pkt
) != 0) {
1854 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1855 SSL_R_LENGTH_MISMATCH
);
1860 * It is an error if the HelloRetryRequest wants a key_share that we
1861 * already sent in the first ClientHello
1863 if (group_id
== s
->s3
.group_id
) {
1864 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1865 SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1869 /* Validate the selected group is one we support */
1870 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
1871 for (i
= 0; i
< num_groups
; i
++) {
1872 if (group_id
== pgroups
[i
])
1876 || !tls_group_allowed(s
, group_id
, SSL_SECOP_CURVE_SUPPORTED
)) {
1877 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1878 SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1882 s
->s3
.group_id
= group_id
;
1883 EVP_PKEY_free(s
->s3
.tmp
.pkey
);
1884 s
->s3
.tmp
.pkey
= NULL
;
1888 if (group_id
!= s
->s3
.group_id
) {
1890 * This isn't for the group that we sent in the original
1893 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1894 SSL_R_BAD_KEY_SHARE
);
1898 if (!PACKET_as_length_prefixed_2(pkt
, &encoded_pt
)
1899 || PACKET_remaining(&encoded_pt
) == 0) {
1900 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1901 SSL_R_LENGTH_MISMATCH
);
1905 skey
= EVP_PKEY_new();
1906 if (skey
== NULL
|| EVP_PKEY_copy_parameters(skey
, ckey
) <= 0) {
1907 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1908 SSL_R_COPY_PARAMETERS_FAILED
);
1912 if (!EVP_PKEY_set1_tls_encodedpoint(skey
, PACKET_data(&encoded_pt
),
1913 PACKET_remaining(&encoded_pt
))) {
1914 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1916 EVP_PKEY_free(skey
);
1920 if (ssl_derive(s
, ckey
, skey
, 1) == 0) {
1921 /* SSLfatal() already called */
1922 EVP_PKEY_free(skey
);
1925 s
->s3
.peer_tmp
= skey
;
1931 int tls_parse_stoc_cookie(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1936 if (!PACKET_as_length_prefixed_2(pkt
, &cookie
)
1937 || !PACKET_memdup(&cookie
, &s
->ext
.tls13_cookie
,
1938 &s
->ext
.tls13_cookie_len
)) {
1939 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_COOKIE
,
1940 SSL_R_LENGTH_MISMATCH
);
1947 int tls_parse_stoc_early_data(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1948 X509
*x
, size_t chainidx
)
1950 if (context
== SSL_EXT_TLS1_3_NEW_SESSION_TICKET
) {
1951 unsigned long max_early_data
;
1953 if (!PACKET_get_net_4(pkt
, &max_early_data
)
1954 || PACKET_remaining(pkt
) != 0) {
1955 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1956 SSL_R_INVALID_MAX_EARLY_DATA
);
1960 s
->session
->ext
.max_early_data
= max_early_data
;
1965 if (PACKET_remaining(pkt
) != 0) {
1966 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1967 SSL_R_BAD_EXTENSION
);
1971 if (!s
->ext
.early_data_ok
1974 * If we get here then we didn't send early data, or we didn't resume
1975 * using the first identity, or the SNI/ALPN is not consistent so the
1976 * server should not be accepting it.
1978 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1979 SSL_R_BAD_EXTENSION
);
1983 s
->ext
.early_data
= SSL_EARLY_DATA_ACCEPTED
;
1988 int tls_parse_stoc_psk(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1991 #ifndef OPENSSL_NO_TLS1_3
1992 unsigned int identity
;
1994 if (!PACKET_get_net_2(pkt
, &identity
) || PACKET_remaining(pkt
) != 0) {
1995 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_PSK
,
1996 SSL_R_LENGTH_MISMATCH
);
2000 if (identity
>= (unsigned int)s
->ext
.tick_identity
) {
2001 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_PSK
,
2002 SSL_R_BAD_PSK_IDENTITY
);
2007 * Session resumption tickets are always sent before PSK tickets. If the
2008 * ticket index is 0 then it must be for a session resumption ticket if we
2009 * sent two tickets, or if we didn't send a PSK ticket.
2011 if (identity
== 0 && (s
->psksession
== NULL
|| s
->ext
.tick_identity
== 2)) {
2013 SSL_SESSION_free(s
->psksession
);
2014 s
->psksession
= NULL
;
2018 if (s
->psksession
== NULL
) {
2019 /* Should never happen */
2020 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_PSK
,
2021 ERR_R_INTERNAL_ERROR
);
2026 * If we used the external PSK for sending early_data then s->early_secret
2027 * is already set up, so don't overwrite it. Otherwise we copy the
2028 * early_secret across that we generated earlier.
2030 if ((s
->early_data_state
!= SSL_EARLY_DATA_WRITE_RETRY
2031 && s
->early_data_state
!= SSL_EARLY_DATA_FINISHED_WRITING
)
2032 || s
->session
->ext
.max_early_data
> 0
2033 || s
->psksession
->ext
.max_early_data
== 0)
2034 memcpy(s
->early_secret
, s
->psksession
->early_secret
, EVP_MAX_MD_SIZE
);
2036 SSL_SESSION_free(s
->session
);
2037 s
->session
= s
->psksession
;
2038 s
->psksession
= NULL
;
2040 /* Early data is only allowed if we used the first ticket */
2042 s
->ext
.early_data_ok
= 0;