2 * Copyright 2016-2017 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 #include <openssl/ocsp.h>
12 #include "../ssl_locl.h"
13 #include "statem_locl.h"
15 EXT_RETURN
tls_construct_ctos_renegotiate(SSL
*s
, WPACKET
*pkt
,
16 unsigned int context
, X509
*x
,
17 size_t chainidx
, int *al
)
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 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE
, ERR_R_INTERNAL_ERROR
);
29 return EXT_RETURN_FAIL
;
32 return EXT_RETURN_SENT
;
35 EXT_RETURN
tls_construct_ctos_server_name(SSL
*s
, WPACKET
*pkt
,
36 unsigned int context
, X509
*x
,
37 size_t chainidx
, int *al
)
39 if (s
->ext
.hostname
== NULL
)
40 return EXT_RETURN_NOT_SENT
;
42 /* Add TLS extension servername to the Client Hello message */
43 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_server_name
)
44 /* Sub-packet for server_name extension */
45 || !WPACKET_start_sub_packet_u16(pkt
)
46 /* Sub-packet for servername list (always 1 hostname)*/
47 || !WPACKET_start_sub_packet_u16(pkt
)
48 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_NAMETYPE_host_name
)
49 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.hostname
,
50 strlen(s
->ext
.hostname
))
51 || !WPACKET_close(pkt
)
52 || !WPACKET_close(pkt
)) {
53 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME
, ERR_R_INTERNAL_ERROR
);
54 return EXT_RETURN_FAIL
;
57 return EXT_RETURN_SENT
;
60 #ifndef OPENSSL_NO_SRP
61 EXT_RETURN
tls_construct_ctos_srp(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
62 X509
*x
, size_t chainidx
, int *al
)
64 /* Add SRP username if there is one */
65 if (s
->srp_ctx
.login
== NULL
)
66 return EXT_RETURN_NOT_SENT
;
68 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_srp
)
69 /* Sub-packet for SRP extension */
70 || !WPACKET_start_sub_packet_u16(pkt
)
71 || !WPACKET_start_sub_packet_u8(pkt
)
72 /* login must not be zero...internal error if so */
73 || !WPACKET_set_flags(pkt
, WPACKET_FLAGS_NON_ZERO_LENGTH
)
74 || !WPACKET_memcpy(pkt
, s
->srp_ctx
.login
,
75 strlen(s
->srp_ctx
.login
))
76 || !WPACKET_close(pkt
)
77 || !WPACKET_close(pkt
)) {
78 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SRP
, ERR_R_INTERNAL_ERROR
);
79 return EXT_RETURN_FAIL
;
82 return EXT_RETURN_SENT
;
87 static int use_ecc(SSL
*s
)
90 unsigned long alg_k
, alg_a
;
91 STACK_OF(SSL_CIPHER
) *cipher_stack
= NULL
;
93 /* See if we support any ECC ciphersuites */
94 if (s
->version
== SSL3_VERSION
)
97 cipher_stack
= SSL_get_ciphers(s
);
98 end
= sk_SSL_CIPHER_num(cipher_stack
);
99 for (i
= 0; i
< end
; i
++) {
100 const SSL_CIPHER
*c
= sk_SSL_CIPHER_value(cipher_stack
, i
);
102 alg_k
= c
->algorithm_mkey
;
103 alg_a
= c
->algorithm_auth
;
104 if ((alg_k
& (SSL_kECDHE
| SSL_kECDHEPSK
))
105 || (alg_a
& SSL_aECDSA
)
106 || c
->min_tls
>= TLS1_3_VERSION
)
113 EXT_RETURN
tls_construct_ctos_ec_pt_formats(SSL
*s
, WPACKET
*pkt
,
114 unsigned int context
, X509
*x
,
115 size_t chainidx
, int *al
)
117 const unsigned char *pformats
;
121 return EXT_RETURN_NOT_SENT
;
123 /* Add TLS extension ECPointFormats to the ClientHello message */
124 tls1_get_formatlist(s
, &pformats
, &num_formats
);
126 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_ec_point_formats
)
127 /* Sub-packet for formats extension */
128 || !WPACKET_start_sub_packet_u16(pkt
)
129 || !WPACKET_sub_memcpy_u8(pkt
, pformats
, num_formats
)
130 || !WPACKET_close(pkt
)) {
131 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
132 return EXT_RETURN_FAIL
;
135 return EXT_RETURN_SENT
;
138 EXT_RETURN
tls_construct_ctos_supported_groups(SSL
*s
, WPACKET
*pkt
,
139 unsigned int context
, X509
*x
,
140 size_t chainidx
, int *al
)
142 const unsigned char *pcurves
= NULL
, *pcurvestmp
;
143 size_t num_curves
= 0, i
;
146 return EXT_RETURN_NOT_SENT
;
149 * Add TLS extension supported_groups to the ClientHello message
151 /* TODO(TLS1.3): Add support for DHE groups */
152 if (!tls1_get_curvelist(s
, 0, &pcurves
, &num_curves
)) {
153 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
154 ERR_R_INTERNAL_ERROR
);
155 return EXT_RETURN_FAIL
;
157 pcurvestmp
= pcurves
;
159 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_groups
)
160 /* Sub-packet for supported_groups extension */
161 || !WPACKET_start_sub_packet_u16(pkt
)
162 || !WPACKET_start_sub_packet_u16(pkt
)) {
163 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
164 ERR_R_INTERNAL_ERROR
);
165 return EXT_RETURN_FAIL
;
167 /* Copy curve ID if supported */
168 for (i
= 0; i
< num_curves
; i
++, pcurvestmp
+= 2) {
169 if (tls_curve_allowed(s
, pcurvestmp
, SSL_SECOP_CURVE_SUPPORTED
)) {
170 if (!WPACKET_put_bytes_u8(pkt
, pcurvestmp
[0])
171 || !WPACKET_put_bytes_u8(pkt
, pcurvestmp
[1])) {
172 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
173 ERR_R_INTERNAL_ERROR
);
174 return EXT_RETURN_FAIL
;
178 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
179 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
180 ERR_R_INTERNAL_ERROR
);
181 return EXT_RETURN_FAIL
;
184 return EXT_RETURN_SENT
;
188 EXT_RETURN
tls_construct_ctos_session_ticket(SSL
*s
, WPACKET
*pkt
,
189 unsigned int context
, X509
*x
,
190 size_t chainidx
, int *al
)
194 if (!tls_use_ticket(s
))
195 return EXT_RETURN_NOT_SENT
;
197 if (!s
->new_session
&& s
->session
!= NULL
198 && s
->session
->ext
.tick
!= NULL
199 && s
->session
->ssl_version
!= TLS1_3_VERSION
) {
200 ticklen
= s
->session
->ext
.ticklen
;
201 } else if (s
->session
&& s
->ext
.session_ticket
!= NULL
202 && s
->ext
.session_ticket
->data
!= NULL
) {
203 ticklen
= s
->ext
.session_ticket
->length
;
204 s
->session
->ext
.tick
= OPENSSL_malloc(ticklen
);
205 if (s
->session
->ext
.tick
== NULL
) {
206 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
,
207 ERR_R_INTERNAL_ERROR
);
208 return EXT_RETURN_FAIL
;
210 memcpy(s
->session
->ext
.tick
,
211 s
->ext
.session_ticket
->data
, ticklen
);
212 s
->session
->ext
.ticklen
= ticklen
;
217 if (ticklen
== 0 && s
->ext
.session_ticket
!= NULL
&&
218 s
->ext
.session_ticket
->data
== NULL
)
219 return EXT_RETURN_NOT_SENT
;
221 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_session_ticket
)
222 || !WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
, ticklen
)) {
223 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
, ERR_R_INTERNAL_ERROR
);
224 return EXT_RETURN_FAIL
;
227 return EXT_RETURN_SENT
;
230 EXT_RETURN
tls_construct_ctos_sig_algs(SSL
*s
, WPACKET
*pkt
,
231 unsigned int context
, X509
*x
,
232 size_t chainidx
, int *al
)
235 const uint16_t *salg
;
237 if (!SSL_CLIENT_USE_SIGALGS(s
))
238 return EXT_RETURN_NOT_SENT
;
240 salglen
= tls12_get_psigalgs(s
, 1, &salg
);
241 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signature_algorithms
)
242 /* Sub-packet for sig-algs extension */
243 || !WPACKET_start_sub_packet_u16(pkt
)
244 /* Sub-packet for the actual list */
245 || !WPACKET_start_sub_packet_u16(pkt
)
246 || !tls12_copy_sigalgs(s
, pkt
, salg
, salglen
)
247 || !WPACKET_close(pkt
)
248 || !WPACKET_close(pkt
)) {
249 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS
, ERR_R_INTERNAL_ERROR
);
250 return EXT_RETURN_FAIL
;
253 return EXT_RETURN_SENT
;
256 #ifndef OPENSSL_NO_OCSP
257 EXT_RETURN
tls_construct_ctos_status_request(SSL
*s
, WPACKET
*pkt
,
258 unsigned int context
, X509
*x
,
259 size_t chainidx
, int *al
)
263 /* This extension isn't defined for client Certificates */
265 return EXT_RETURN_NOT_SENT
;
267 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
)
268 return EXT_RETURN_NOT_SENT
;
270 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_status_request
)
271 /* Sub-packet for status request extension */
272 || !WPACKET_start_sub_packet_u16(pkt
)
273 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_STATUSTYPE_ocsp
)
274 /* Sub-packet for the ids */
275 || !WPACKET_start_sub_packet_u16(pkt
)) {
276 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
277 return EXT_RETURN_FAIL
;
279 for (i
= 0; i
< sk_OCSP_RESPID_num(s
->ext
.ocsp
.ids
); i
++) {
280 unsigned char *idbytes
;
281 OCSP_RESPID
*id
= sk_OCSP_RESPID_value(s
->ext
.ocsp
.ids
, i
);
282 int idlen
= i2d_OCSP_RESPID(id
, NULL
);
285 /* Sub-packet for an individual id */
286 || !WPACKET_sub_allocate_bytes_u16(pkt
, idlen
, &idbytes
)
287 || i2d_OCSP_RESPID(id
, &idbytes
) != idlen
) {
288 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
289 ERR_R_INTERNAL_ERROR
);
290 return EXT_RETURN_FAIL
;
293 if (!WPACKET_close(pkt
)
294 || !WPACKET_start_sub_packet_u16(pkt
)) {
295 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
296 return EXT_RETURN_FAIL
;
298 if (s
->ext
.ocsp
.exts
) {
299 unsigned char *extbytes
;
300 int extlen
= i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, NULL
);
303 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
304 ERR_R_INTERNAL_ERROR
);
305 return EXT_RETURN_FAIL
;
307 if (!WPACKET_allocate_bytes(pkt
, extlen
, &extbytes
)
308 || i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, &extbytes
)
310 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
311 ERR_R_INTERNAL_ERROR
);
312 return EXT_RETURN_FAIL
;
315 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
316 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
317 return EXT_RETURN_FAIL
;
320 return EXT_RETURN_SENT
;
324 #ifndef OPENSSL_NO_NEXTPROTONEG
325 EXT_RETURN
tls_construct_ctos_npn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
326 X509
*x
, size_t chainidx
, int *al
)
328 if (s
->ctx
->ext
.npn_select_cb
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
329 return EXT_RETURN_NOT_SENT
;
332 * The client advertises an empty extension to indicate its support
333 * for Next Protocol Negotiation
335 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_next_proto_neg
)
336 || !WPACKET_put_bytes_u16(pkt
, 0)) {
337 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN
, ERR_R_INTERNAL_ERROR
);
338 return EXT_RETURN_FAIL
;
341 return EXT_RETURN_SENT
;
345 EXT_RETURN
tls_construct_ctos_alpn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
346 X509
*x
, size_t chainidx
, int *al
)
348 s
->s3
->alpn_sent
= 0;
350 if (s
->ext
.alpn
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
351 return EXT_RETURN_NOT_SENT
;
353 if (!WPACKET_put_bytes_u16(pkt
,
354 TLSEXT_TYPE_application_layer_protocol_negotiation
)
355 /* Sub-packet ALPN extension */
356 || !WPACKET_start_sub_packet_u16(pkt
)
357 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.alpn
, s
->ext
.alpn_len
)
358 || !WPACKET_close(pkt
)) {
359 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN
, ERR_R_INTERNAL_ERROR
);
360 return EXT_RETURN_FAIL
;
362 s
->s3
->alpn_sent
= 1;
364 return EXT_RETURN_SENT
;
368 #ifndef OPENSSL_NO_SRTP
369 EXT_RETURN
tls_construct_ctos_use_srtp(SSL
*s
, WPACKET
*pkt
,
370 unsigned int context
, X509
*x
,
371 size_t chainidx
, int *al
)
373 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
= SSL_get_srtp_profiles(s
);
377 return EXT_RETURN_NOT_SENT
;
379 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_use_srtp
)
380 /* Sub-packet for SRTP extension */
381 || !WPACKET_start_sub_packet_u16(pkt
)
382 /* Sub-packet for the protection profile list */
383 || !WPACKET_start_sub_packet_u16(pkt
)) {
384 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
, ERR_R_INTERNAL_ERROR
);
385 return EXT_RETURN_FAIL
;
388 end
= sk_SRTP_PROTECTION_PROFILE_num(clnt
);
389 for (i
= 0; i
< end
; i
++) {
390 const SRTP_PROTECTION_PROFILE
*prof
=
391 sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
393 if (prof
== NULL
|| !WPACKET_put_bytes_u16(pkt
, prof
->id
)) {
394 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
, ERR_R_INTERNAL_ERROR
);
395 return EXT_RETURN_FAIL
;
398 if (!WPACKET_close(pkt
)
399 /* Add an empty use_mki value */
400 || !WPACKET_put_bytes_u8(pkt
, 0)
401 || !WPACKET_close(pkt
)) {
402 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
, ERR_R_INTERNAL_ERROR
);
403 return EXT_RETURN_FAIL
;
406 return EXT_RETURN_SENT
;
410 EXT_RETURN
tls_construct_ctos_etm(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
411 X509
*x
, size_t chainidx
, int *al
)
413 if (s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
414 return EXT_RETURN_NOT_SENT
;
416 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_encrypt_then_mac
)
417 || !WPACKET_put_bytes_u16(pkt
, 0)) {
418 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM
, ERR_R_INTERNAL_ERROR
);
419 return EXT_RETURN_FAIL
;
422 return EXT_RETURN_SENT
;
425 #ifndef OPENSSL_NO_CT
426 EXT_RETURN
tls_construct_ctos_sct(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
427 X509
*x
, size_t chainidx
, int *al
)
429 if (s
->ct_validation_callback
== NULL
)
430 return EXT_RETURN_NOT_SENT
;
432 /* Not defined for client Certificates */
434 return EXT_RETURN_NOT_SENT
;
436 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signed_certificate_timestamp
)
437 || !WPACKET_put_bytes_u16(pkt
, 0)) {
438 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT
, ERR_R_INTERNAL_ERROR
);
439 return EXT_RETURN_FAIL
;
442 return EXT_RETURN_SENT
;
446 EXT_RETURN
tls_construct_ctos_ems(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
447 X509
*x
, size_t chainidx
, int *al
)
449 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_extended_master_secret
)
450 || !WPACKET_put_bytes_u16(pkt
, 0)) {
451 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS
, ERR_R_INTERNAL_ERROR
);
452 return EXT_RETURN_FAIL
;
455 return EXT_RETURN_SENT
;
458 EXT_RETURN
tls_construct_ctos_supported_versions(SSL
*s
, WPACKET
*pkt
,
459 unsigned int context
, X509
*x
,
460 size_t chainidx
, int *al
)
462 int currv
, min_version
, max_version
, reason
;
464 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_versions
)
465 || !WPACKET_start_sub_packet_u16(pkt
)
466 || !WPACKET_start_sub_packet_u8(pkt
)) {
467 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
468 ERR_R_INTERNAL_ERROR
);
469 return EXT_RETURN_FAIL
;
472 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
);
474 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
, reason
);
475 return EXT_RETURN_FAIL
;
479 * TODO(TLS1.3): There is some discussion on the TLS list as to whether
480 * we should include versions <TLS1.2. For the moment we do. To be
483 for (currv
= max_version
; currv
>= min_version
; currv
--) {
484 /* TODO(TLS1.3): Remove this first if clause prior to release!! */
485 if (currv
== TLS1_3_VERSION
) {
486 if (!WPACKET_put_bytes_u16(pkt
, TLS1_3_VERSION_DRAFT
)) {
487 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
488 ERR_R_INTERNAL_ERROR
);
489 return EXT_RETURN_FAIL
;
491 } else if (!WPACKET_put_bytes_u16(pkt
, currv
)) {
492 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
493 ERR_R_INTERNAL_ERROR
);
494 return EXT_RETURN_FAIL
;
497 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
498 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
499 ERR_R_INTERNAL_ERROR
);
500 return EXT_RETURN_FAIL
;
503 return EXT_RETURN_SENT
;
507 * Construct a psk_kex_modes extension. We only have two modes we know about
508 * at this stage, so we send both.
510 EXT_RETURN
tls_construct_ctos_psk_kex_modes(SSL
*s
, WPACKET
*pkt
,
511 unsigned int context
, X509
*x
,
512 size_t chainidx
, int *al
)
514 #ifndef OPENSSL_NO_TLS1_3
516 * TODO(TLS1.3): Do we want this list to be configurable? For now we always
517 * just send both supported modes
519 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk_kex_modes
)
520 || !WPACKET_start_sub_packet_u16(pkt
)
521 || !WPACKET_start_sub_packet_u8(pkt
)
522 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE_DHE
)
523 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE
)
524 || !WPACKET_close(pkt
)
525 || !WPACKET_close(pkt
)) {
526 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES
, ERR_R_INTERNAL_ERROR
);
527 return EXT_RETURN_FAIL
;
530 s
->ext
.psk_kex_mode
= TLSEXT_KEX_MODE_FLAG_KE
| TLSEXT_KEX_MODE_FLAG_KE_DHE
;
533 return EXT_RETURN_SENT
;
536 #ifndef OPENSSL_NO_TLS1_3
537 static int add_key_share(SSL
*s
, WPACKET
*pkt
, unsigned int curve_id
)
539 unsigned char *encoded_point
= NULL
;
540 EVP_PKEY
*key_share_key
= NULL
;
543 if (s
->s3
->tmp
.pkey
!= NULL
) {
544 assert(s
->hello_retry_request
);
545 if (!s
->hello_retry_request
) {
546 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
547 return EXT_RETURN_FAIL
;
550 * Could happen if we got an HRR that wasn't requesting a new key_share
552 key_share_key
= s
->s3
->tmp
.pkey
;
554 key_share_key
= ssl_generate_pkey_curve(curve_id
);
555 if (key_share_key
== NULL
) {
556 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_EVP_LIB
);
557 return EXT_RETURN_FAIL
;
561 /* Encode the public key. */
562 encodedlen
= EVP_PKEY_get1_tls_encodedpoint(key_share_key
,
564 if (encodedlen
== 0) {
565 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_EC_LIB
);
569 /* Create KeyShareEntry */
570 if (!WPACKET_put_bytes_u16(pkt
, curve_id
)
571 || !WPACKET_sub_memcpy_u16(pkt
, encoded_point
, encodedlen
)) {
572 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
577 * TODO(TLS1.3): When changing to send more than one key_share we're
578 * going to need to be able to save more than one EVP_PKEY. For now
579 * we reuse the existing tmp.pkey
581 s
->s3
->tmp
.pkey
= key_share_key
;
582 s
->s3
->group_id
= curve_id
;
583 OPENSSL_free(encoded_point
);
585 return EXT_RETURN_SENT
;
587 if (s
->s3
->tmp
.pkey
== NULL
)
588 EVP_PKEY_free(key_share_key
);
589 OPENSSL_free(encoded_point
);
590 return EXT_RETURN_FAIL
;
594 EXT_RETURN
tls_construct_ctos_key_share(SSL
*s
, WPACKET
*pkt
,
595 unsigned int context
, X509
*x
,
596 size_t chainidx
, int *al
)
598 #ifndef OPENSSL_NO_TLS1_3
599 size_t i
, num_curves
= 0;
600 const unsigned char *pcurves
= NULL
;
601 unsigned int curve_id
= 0;
603 /* key_share extension */
604 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_key_share
)
605 /* Extension data sub-packet */
606 || !WPACKET_start_sub_packet_u16(pkt
)
607 /* KeyShare list sub-packet */
608 || !WPACKET_start_sub_packet_u16(pkt
)) {
609 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
610 return EXT_RETURN_FAIL
;
613 if (!tls1_get_curvelist(s
, 0, &pcurves
, &num_curves
)) {
614 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
615 return EXT_RETURN_FAIL
;
619 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
622 if (s
->s3
->group_id
!= 0) {
623 curve_id
= s
->s3
->group_id
;
625 for (i
= 0; i
< num_curves
; i
++, pcurves
+= 2) {
627 if (!tls_curve_allowed(s
, pcurves
, SSL_SECOP_CURVE_SUPPORTED
))
630 curve_id
= bytestogroup(pcurves
);
636 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, SSL_R_NO_SUITABLE_KEY_SHARE
);
637 return EXT_RETURN_FAIL
;
640 if (!add_key_share(s
, pkt
, curve_id
))
641 return EXT_RETURN_FAIL
;
643 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
644 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
645 return EXT_RETURN_FAIL
;
649 return EXT_RETURN_SENT
;
652 EXT_RETURN
tls_construct_ctos_cookie(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
653 X509
*x
, size_t chainidx
, int *al
)
655 EXT_RETURN ret
= EXT_RETURN_FAIL
;
657 /* Should only be set if we've had an HRR */
658 if (s
->ext
.tls13_cookie_len
== 0)
659 return EXT_RETURN_NOT_SENT
;
661 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_cookie
)
662 /* Extension data sub-packet */
663 || !WPACKET_start_sub_packet_u16(pkt
)
664 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.tls13_cookie
,
665 s
->ext
.tls13_cookie_len
)
666 || !WPACKET_close(pkt
)) {
667 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_COOKIE
, ERR_R_INTERNAL_ERROR
);
671 ret
= EXT_RETURN_SENT
;
673 OPENSSL_free(s
->ext
.tls13_cookie
);
674 s
->ext
.tls13_cookie
= NULL
;
675 s
->ext
.tls13_cookie_len
= 0;
680 EXT_RETURN
tls_construct_ctos_early_data(SSL
*s
, WPACKET
*pkt
,
681 unsigned int context
, X509
*x
,
682 size_t chainidx
, int *al
)
684 if (s
->early_data_state
!= SSL_EARLY_DATA_CONNECTING
685 || s
->session
->ext
.max_early_data
== 0) {
686 s
->max_early_data
= 0;
687 return EXT_RETURN_NOT_SENT
;
689 s
->max_early_data
= s
->session
->ext
.max_early_data
;
691 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_early_data
)
692 || !WPACKET_start_sub_packet_u16(pkt
)
693 || !WPACKET_close(pkt
)) {
694 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
695 return EXT_RETURN_FAIL
;
699 * We set this to rejected here. Later, if the server acknowledges the
700 * extension, we set it to accepted.
702 s
->ext
.early_data
= SSL_EARLY_DATA_REJECTED
;
704 return EXT_RETURN_SENT
;
707 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
708 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
711 * PSK pre binder overhead =
712 * 2 bytes for TLSEXT_TYPE_psk
713 * 2 bytes for extension length
714 * 2 bytes for identities list length
715 * 2 bytes for identity length
716 * 4 bytes for obfuscated_ticket_age
717 * 2 bytes for binder list length
718 * 1 byte for binder length
719 * The above excludes the number of bytes for the identity itself and the
720 * subsequent binder bytes
722 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
724 EXT_RETURN
tls_construct_ctos_padding(SSL
*s
, WPACKET
*pkt
,
725 unsigned int context
, X509
*x
,
726 size_t chainidx
, int *al
)
728 unsigned char *padbytes
;
731 if ((s
->options
& SSL_OP_TLSEXT_PADDING
) == 0)
732 return EXT_RETURN_NOT_SENT
;
735 * Add padding to workaround bugs in F5 terminators. See RFC7685.
736 * This code calculates the length of all extensions added so far but
737 * excludes the PSK extension (because that MUST be written last). Therefore
738 * this extension MUST always appear second to last.
740 if (!WPACKET_get_total_written(pkt
, &hlen
)) {
741 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING
, ERR_R_INTERNAL_ERROR
);
742 return EXT_RETURN_FAIL
;
746 * If we're going to send a PSK then that will be written out after this
747 * extension, so we need to calculate how long it is going to be.
749 if (s
->session
->ssl_version
== TLS1_3_VERSION
750 && s
->session
->ext
.ticklen
!= 0
751 && s
->session
->cipher
!= NULL
) {
752 const EVP_MD
*md
= ssl_md(s
->session
->cipher
->algorithm2
);
756 * Add the fixed PSK overhead, the identity length and the binder
759 hlen
+= PSK_PRE_BINDER_OVERHEAD
+ s
->session
->ext
.ticklen
764 if (hlen
> F5_WORKAROUND_MIN_MSG_LEN
&& hlen
< F5_WORKAROUND_MAX_MSG_LEN
) {
765 /* Calculate the amount of padding we need to add */
766 hlen
= F5_WORKAROUND_MAX_MSG_LEN
- hlen
;
769 * Take off the size of extension header itself (2 bytes for type and
770 * 2 bytes for length bytes)
777 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_padding
)
778 || !WPACKET_sub_allocate_bytes_u16(pkt
, hlen
, &padbytes
)) {
779 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING
, ERR_R_INTERNAL_ERROR
);
782 memset(padbytes
, 0, hlen
);
785 return EXT_RETURN_SENT
;
789 * Construct the pre_shared_key extension
791 EXT_RETURN
tls_construct_ctos_psk(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
792 X509
*x
, size_t chainidx
, int *al
)
794 #ifndef OPENSSL_NO_TLS1_3
795 uint32_t now
, agesec
, agems
;
796 size_t hashsize
, binderoffset
, msglen
;
797 unsigned char *binder
= NULL
, *msgstart
= NULL
;
799 EXT_RETURN ret
= EXT_RETURN_FAIL
;
801 s
->session
->ext
.tick_identity
= TLSEXT_PSK_BAD_IDENTITY
;
804 * Note: At this stage of the code we only support adding a single
805 * resumption PSK. If we add support for multiple PSKs then the length
806 * calculations in the padding extension will need to be adjusted.
810 * If this is an incompatible or new session then we have nothing to resume
811 * so don't add this extension.
813 if (s
->session
->ssl_version
!= TLS1_3_VERSION
814 || s
->session
->ext
.ticklen
== 0)
815 return EXT_RETURN_NOT_SENT
;
817 if (s
->session
->cipher
== NULL
) {
818 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
822 md
= ssl_md(s
->session
->cipher
->algorithm2
);
824 /* Don't recognize this cipher so we can't use the session. Ignore it */
825 return EXT_RETURN_NOT_SENT
;
828 if (s
->hello_retry_request
&& md
!= ssl_handshake_md(s
)) {
830 * Selected ciphersuite hash does not match the hash for the session so
833 return EXT_RETURN_NOT_SENT
;
837 * Technically the C standard just says time() returns a time_t and says
838 * nothing about the encoding of that type. In practice most implementations
839 * follow POSIX which holds it as an integral type in seconds since epoch.
840 * We've already made the assumption that we can do this in multiple places
841 * in the code, so portability shouldn't be an issue.
843 now
= (uint32_t)time(NULL
);
844 agesec
= now
- (uint32_t)s
->session
->time
;
846 if (s
->session
->ext
.tick_lifetime_hint
< agesec
) {
847 /* Ticket is too old. Ignore it. */
848 return EXT_RETURN_NOT_SENT
;
852 * Calculate age in ms. We're just doing it to nearest second. Should be
855 agems
= agesec
* (uint32_t)1000;
857 if (agesec
!= 0 && agems
/ (uint32_t)1000 != agesec
) {
859 * Overflow. Shouldn't happen unless this is a *really* old session. If
860 * so we just ignore it.
862 return EXT_RETURN_NOT_SENT
;
866 * Obfuscate the age. Overflow here is fine, this addition is supposed to
869 agems
+= s
->session
->ext
.tick_age_add
;
871 hashsize
= EVP_MD_size(md
);
873 /* Create the extension, but skip over the binder for now */
874 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk
)
875 || !WPACKET_start_sub_packet_u16(pkt
)
876 || !WPACKET_start_sub_packet_u16(pkt
)
877 || !WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
,
878 s
->session
->ext
.ticklen
)
879 || !WPACKET_put_bytes_u32(pkt
, agems
)
880 || !WPACKET_close(pkt
)
881 || !WPACKET_get_total_written(pkt
, &binderoffset
)
882 || !WPACKET_start_sub_packet_u16(pkt
)
883 || !WPACKET_sub_allocate_bytes_u8(pkt
, hashsize
, &binder
)
884 || !WPACKET_close(pkt
)
885 || !WPACKET_close(pkt
)
886 || !WPACKET_get_total_written(pkt
, &msglen
)
888 * We need to fill in all the sub-packet lengths now so we can
889 * calculate the HMAC of the message up to the binders
891 || !WPACKET_fill_lengths(pkt
)) {
892 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
896 msgstart
= WPACKET_get_curr(pkt
) - msglen
;
898 if (tls_psk_do_binder(s
, md
, msgstart
, binderoffset
, NULL
, binder
,
899 s
->session
, 1) != 1) {
900 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
904 s
->session
->ext
.tick_identity
= 0;
906 ret
= EXT_RETURN_SENT
;
915 * Parse the server's renegotiation binding and abort if it's not right
917 int tls_parse_stoc_renegotiate(SSL
*s
, PACKET
*pkt
, unsigned int context
,
918 X509
*x
, size_t chainidx
, int *al
)
920 size_t expected_len
= s
->s3
->previous_client_finished_len
921 + s
->s3
->previous_server_finished_len
;
923 const unsigned char *data
;
925 /* Check for logic errors */
926 assert(expected_len
== 0 || s
->s3
->previous_client_finished_len
!= 0);
927 assert(expected_len
== 0 || s
->s3
->previous_server_finished_len
!= 0);
929 /* Parse the length byte */
930 if (!PACKET_get_1_len(pkt
, &ilen
)) {
931 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
932 SSL_R_RENEGOTIATION_ENCODING_ERR
);
933 *al
= SSL_AD_ILLEGAL_PARAMETER
;
937 /* Consistency check */
938 if (PACKET_remaining(pkt
) != ilen
) {
939 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
940 SSL_R_RENEGOTIATION_ENCODING_ERR
);
941 *al
= SSL_AD_ILLEGAL_PARAMETER
;
945 /* Check that the extension matches */
946 if (ilen
!= expected_len
) {
947 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
948 SSL_R_RENEGOTIATION_MISMATCH
);
949 *al
= SSL_AD_HANDSHAKE_FAILURE
;
953 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
->previous_client_finished_len
)
954 || memcmp(data
, s
->s3
->previous_client_finished
,
955 s
->s3
->previous_client_finished_len
) != 0) {
956 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
957 SSL_R_RENEGOTIATION_MISMATCH
);
958 *al
= SSL_AD_HANDSHAKE_FAILURE
;
962 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
->previous_server_finished_len
)
963 || memcmp(data
, s
->s3
->previous_server_finished
,
964 s
->s3
->previous_server_finished_len
) != 0) {
965 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
966 SSL_R_RENEGOTIATION_MISMATCH
);
967 *al
= SSL_AD_ILLEGAL_PARAMETER
;
970 s
->s3
->send_connection_binding
= 1;
975 int tls_parse_stoc_server_name(SSL
*s
, PACKET
*pkt
, unsigned int context
,
976 X509
*x
, size_t chainidx
, int *al
)
978 if (s
->ext
.hostname
== NULL
|| PACKET_remaining(pkt
) > 0) {
979 *al
= SSL_AD_UNRECOGNIZED_NAME
;
984 if (s
->session
->ext
.hostname
!= NULL
) {
985 *al
= SSL_AD_INTERNAL_ERROR
;
988 s
->session
->ext
.hostname
= OPENSSL_strdup(s
->ext
.hostname
);
989 if (s
->session
->ext
.hostname
== NULL
) {
990 *al
= SSL_AD_INTERNAL_ERROR
;
998 #ifndef OPENSSL_NO_EC
999 int tls_parse_stoc_ec_pt_formats(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1000 X509
*x
, size_t chainidx
, int *al
)
1002 unsigned int ecpointformats_len
;
1003 PACKET ecptformatlist
;
1005 if (!PACKET_as_length_prefixed_1(pkt
, &ecptformatlist
)) {
1006 *al
= SSL_AD_DECODE_ERROR
;
1010 ecpointformats_len
= PACKET_remaining(&ecptformatlist
);
1011 s
->session
->ext
.ecpointformats_len
= 0;
1013 OPENSSL_free(s
->session
->ext
.ecpointformats
);
1014 s
->session
->ext
.ecpointformats
= OPENSSL_malloc(ecpointformats_len
);
1015 if (s
->session
->ext
.ecpointformats
== NULL
) {
1016 *al
= SSL_AD_INTERNAL_ERROR
;
1020 s
->session
->ext
.ecpointformats_len
= ecpointformats_len
;
1022 if (!PACKET_copy_bytes(&ecptformatlist
,
1023 s
->session
->ext
.ecpointformats
,
1024 ecpointformats_len
)) {
1025 *al
= SSL_AD_INTERNAL_ERROR
;
1034 int tls_parse_stoc_session_ticket(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1035 X509
*x
, size_t chainidx
, int *al
)
1037 if (s
->ext
.session_ticket_cb
!= NULL
&&
1038 !s
->ext
.session_ticket_cb(s
, PACKET_data(pkt
),
1039 PACKET_remaining(pkt
),
1040 s
->ext
.session_ticket_cb_arg
)) {
1041 *al
= SSL_AD_INTERNAL_ERROR
;
1045 if (!tls_use_ticket(s
) || PACKET_remaining(pkt
) > 0) {
1046 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1050 s
->ext
.ticket_expected
= 1;
1055 #ifndef OPENSSL_NO_OCSP
1056 int tls_parse_stoc_status_request(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1057 X509
*x
, size_t chainidx
, int *al
)
1060 * MUST only be sent if we've requested a status
1061 * request message. In TLS <= 1.2 it must also be empty.
1063 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
1064 || (!SSL_IS_TLS13(s
) && PACKET_remaining(pkt
) > 0)) {
1065 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1069 if (SSL_IS_TLS13(s
)) {
1070 /* We only know how to handle this if it's for the first Certificate in
1071 * the chain. We ignore any other responses.
1075 return tls_process_cert_status_body(s
, pkt
, al
);
1078 /* Set flag to expect CertificateStatus message */
1079 s
->ext
.status_expected
= 1;
1086 #ifndef OPENSSL_NO_CT
1087 int tls_parse_stoc_sct(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1088 size_t chainidx
, int *al
)
1091 * Only take it if we asked for it - i.e if there is no CT validation
1092 * callback set, then a custom extension MAY be processing it, so we
1093 * need to let control continue to flow to that.
1095 if (s
->ct_validation_callback
!= NULL
) {
1096 size_t size
= PACKET_remaining(pkt
);
1098 /* Simply copy it off for later processing */
1099 OPENSSL_free(s
->ext
.scts
);
1102 s
->ext
.scts_len
= size
;
1104 s
->ext
.scts
= OPENSSL_malloc(size
);
1105 if (s
->ext
.scts
== NULL
1106 || !PACKET_copy_bytes(pkt
, s
->ext
.scts
, size
)) {
1107 *al
= SSL_AD_INTERNAL_ERROR
;
1112 ENDPOINT role
= (context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0
1113 ? ENDPOINT_CLIENT
: ENDPOINT_BOTH
;
1116 * If we didn't ask for it then there must be a custom extension,
1117 * otherwise this is unsolicited.
1119 if (custom_ext_find(&s
->cert
->custext
, role
,
1120 TLSEXT_TYPE_signed_certificate_timestamp
,
1122 *al
= TLS1_AD_UNSUPPORTED_EXTENSION
;
1126 if (custom_ext_parse(s
, context
,
1127 TLSEXT_TYPE_signed_certificate_timestamp
,
1128 PACKET_data(pkt
), PACKET_remaining(pkt
),
1129 x
, chainidx
, al
) <= 0)
1138 #ifndef OPENSSL_NO_NEXTPROTONEG
1140 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1141 * elements of zero length are allowed and the set of elements must exactly
1142 * fill the length of the block. Returns 1 on success or 0 on failure.
1144 static int ssl_next_proto_validate(PACKET
*pkt
)
1146 PACKET tmp_protocol
;
1148 while (PACKET_remaining(pkt
)) {
1149 if (!PACKET_get_length_prefixed_1(pkt
, &tmp_protocol
)
1150 || PACKET_remaining(&tmp_protocol
) == 0)
1157 int tls_parse_stoc_npn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1158 size_t chainidx
, int *al
)
1160 unsigned char *selected
;
1161 unsigned char selected_len
;
1164 /* Check if we are in a renegotiation. If so ignore this extension */
1165 if (!SSL_IS_FIRST_HANDSHAKE(s
))
1168 /* We must have requested it. */
1169 if (s
->ctx
->ext
.npn_select_cb
== NULL
) {
1170 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1174 /* The data must be valid */
1176 if (!ssl_next_proto_validate(&tmppkt
)) {
1177 *al
= SSL_AD_DECODE_ERROR
;
1180 if (s
->ctx
->ext
.npn_select_cb(s
, &selected
, &selected_len
,
1182 PACKET_remaining(pkt
),
1183 s
->ctx
->ext
.npn_select_cb_arg
) !=
1184 SSL_TLSEXT_ERR_OK
) {
1185 *al
= SSL_AD_INTERNAL_ERROR
;
1190 * Could be non-NULL if server has sent multiple NPN extensions in
1191 * a single Serverhello
1193 OPENSSL_free(s
->ext
.npn
);
1194 s
->ext
.npn
= OPENSSL_malloc(selected_len
);
1195 if (s
->ext
.npn
== NULL
) {
1196 *al
= SSL_AD_INTERNAL_ERROR
;
1200 memcpy(s
->ext
.npn
, selected
, selected_len
);
1201 s
->ext
.npn_len
= selected_len
;
1202 s
->s3
->npn_seen
= 1;
1208 int tls_parse_stoc_alpn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1209 size_t chainidx
, int *al
)
1213 /* We must have requested it. */
1214 if (!s
->s3
->alpn_sent
) {
1215 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1219 * The extension data consists of:
1220 * uint16 list_length
1221 * uint8 proto_length;
1222 * uint8 proto[proto_length];
1224 if (!PACKET_get_net_2_len(pkt
, &len
)
1225 || PACKET_remaining(pkt
) != len
|| !PACKET_get_1_len(pkt
, &len
)
1226 || PACKET_remaining(pkt
) != len
) {
1227 *al
= SSL_AD_DECODE_ERROR
;
1230 OPENSSL_free(s
->s3
->alpn_selected
);
1231 s
->s3
->alpn_selected
= OPENSSL_malloc(len
);
1232 if (s
->s3
->alpn_selected
== NULL
) {
1233 *al
= SSL_AD_INTERNAL_ERROR
;
1236 if (!PACKET_copy_bytes(pkt
, s
->s3
->alpn_selected
, len
)) {
1237 *al
= SSL_AD_DECODE_ERROR
;
1240 s
->s3
->alpn_selected_len
= len
;
1245 #ifndef OPENSSL_NO_SRTP
1246 int tls_parse_stoc_use_srtp(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1247 size_t chainidx
, int *al
)
1249 unsigned int id
, ct
, mki
;
1251 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
;
1252 SRTP_PROTECTION_PROFILE
*prof
;
1254 if (!PACKET_get_net_2(pkt
, &ct
) || ct
!= 2
1255 || !PACKET_get_net_2(pkt
, &id
)
1256 || !PACKET_get_1(pkt
, &mki
)
1257 || PACKET_remaining(pkt
) != 0) {
1258 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1259 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1260 *al
= SSL_AD_DECODE_ERROR
;
1265 /* Must be no MKI, since we never offer one */
1266 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
, SSL_R_BAD_SRTP_MKI_VALUE
);
1267 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1271 /* Throw an error if the server gave us an unsolicited extension */
1272 clnt
= SSL_get_srtp_profiles(s
);
1274 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
, SSL_R_NO_SRTP_PROFILES
);
1275 *al
= SSL_AD_DECODE_ERROR
;
1280 * Check to see if the server gave us something we support (and
1281 * presumably offered)
1283 for (i
= 0; i
< sk_SRTP_PROTECTION_PROFILE_num(clnt
); i
++) {
1284 prof
= sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
1286 if (prof
->id
== id
) {
1287 s
->srtp_profile
= prof
;
1293 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1294 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1295 *al
= SSL_AD_DECODE_ERROR
;
1300 int tls_parse_stoc_etm(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1301 size_t chainidx
, int *al
)
1303 /* Ignore if inappropriate ciphersuite */
1304 if (!(s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
1305 && s
->s3
->tmp
.new_cipher
->algorithm_mac
!= SSL_AEAD
1306 && s
->s3
->tmp
.new_cipher
->algorithm_enc
!= SSL_RC4
)
1312 int tls_parse_stoc_ems(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1313 size_t chainidx
, int *al
)
1315 s
->s3
->flags
|= TLS1_FLAGS_RECEIVED_EXTMS
;
1317 s
->session
->flags
|= SSL_SESS_FLAG_EXTMS
;
1322 int tls_parse_stoc_key_share(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1323 size_t chainidx
, int *al
)
1325 #ifndef OPENSSL_NO_TLS1_3
1326 unsigned int group_id
;
1328 EVP_PKEY
*ckey
= s
->s3
->tmp
.pkey
, *skey
= NULL
;
1331 if (ckey
== NULL
|| s
->s3
->peer_tmp
!= NULL
) {
1332 *al
= SSL_AD_INTERNAL_ERROR
;
1333 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1337 if (!PACKET_get_net_2(pkt
, &group_id
)) {
1338 *al
= SSL_AD_DECODE_ERROR
;
1339 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_LENGTH_MISMATCH
);
1343 if ((context
& SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
) != 0) {
1344 unsigned const char *pcurves
= NULL
;
1345 size_t i
, num_curves
;
1347 if (PACKET_remaining(pkt
) != 0) {
1348 *al
= SSL_AD_DECODE_ERROR
;
1349 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_LENGTH_MISMATCH
);
1354 * It is an error if the HelloRetryRequest wants a key_share that we
1355 * already sent in the first ClientHello
1357 if (group_id
== s
->s3
->group_id
) {
1358 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1359 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1363 /* Validate the selected group is one we support */
1364 if (!tls1_get_curvelist(s
, 0, &pcurves
, &num_curves
)) {
1365 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1368 for (i
= 0; i
< num_curves
; i
++, pcurves
+= 2) {
1369 if (group_id
== bytestogroup(pcurves
))
1373 || !tls_curve_allowed(s
, pcurves
, SSL_SECOP_CURVE_SUPPORTED
)) {
1374 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1375 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1379 s
->s3
->group_id
= group_id
;
1380 EVP_PKEY_free(s
->s3
->tmp
.pkey
);
1381 s
->s3
->tmp
.pkey
= NULL
;
1385 if (group_id
!= s
->s3
->group_id
) {
1387 * This isn't for the group that we sent in the original
1390 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1391 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1395 if (!PACKET_as_length_prefixed_2(pkt
, &encoded_pt
)
1396 || PACKET_remaining(&encoded_pt
) == 0) {
1397 *al
= SSL_AD_DECODE_ERROR
;
1398 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_LENGTH_MISMATCH
);
1402 skey
= ssl_generate_pkey(ckey
);
1404 *al
= SSL_AD_INTERNAL_ERROR
;
1405 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_MALLOC_FAILURE
);
1408 if (!EVP_PKEY_set1_tls_encodedpoint(skey
, PACKET_data(&encoded_pt
),
1409 PACKET_remaining(&encoded_pt
))) {
1410 *al
= SSL_AD_DECODE_ERROR
;
1411 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_ECPOINT
);
1412 EVP_PKEY_free(skey
);
1416 if (ssl_derive(s
, ckey
, skey
, 1) == 0) {
1417 *al
= SSL_AD_INTERNAL_ERROR
;
1418 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1419 EVP_PKEY_free(skey
);
1422 s
->s3
->peer_tmp
= skey
;
1428 int tls_parse_stoc_cookie(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1429 size_t chainidx
, int *al
)
1433 if (!PACKET_as_length_prefixed_2(pkt
, &cookie
)
1434 || !PACKET_memdup(&cookie
, &s
->ext
.tls13_cookie
,
1435 &s
->ext
.tls13_cookie_len
)) {
1436 *al
= SSL_AD_DECODE_ERROR
;
1437 SSLerr(SSL_F_TLS_PARSE_STOC_COOKIE
, SSL_R_LENGTH_MISMATCH
);
1444 int tls_parse_stoc_early_data(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1445 X509
*x
, size_t chainidx
, int *al
)
1447 if (context
== SSL_EXT_TLS1_3_NEW_SESSION_TICKET
) {
1448 unsigned long max_early_data
;
1450 if (!PACKET_get_net_4(pkt
, &max_early_data
)
1451 || PACKET_remaining(pkt
) != 0) {
1452 SSLerr(SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1453 SSL_R_INVALID_MAX_EARLY_DATA
);
1454 *al
= SSL_AD_DECODE_ERROR
;
1458 s
->session
->ext
.max_early_data
= max_early_data
;
1463 if (PACKET_remaining(pkt
) != 0) {
1464 *al
= SSL_AD_DECODE_ERROR
;
1468 if (s
->ext
.early_data
!= SSL_EARLY_DATA_REJECTED
1470 || s
->session
->ext
.tick_identity
!= 0) {
1472 * If we get here then we didn't send early data, or we didn't resume
1473 * using the first identity so the server should not be accepting it.
1475 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1479 s
->ext
.early_data
= SSL_EARLY_DATA_ACCEPTED
;
1484 int tls_parse_stoc_psk(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1485 size_t chainidx
, int *al
)
1487 #ifndef OPENSSL_NO_TLS1_3
1488 unsigned int identity
;
1490 if (!PACKET_get_net_2(pkt
, &identity
) || PACKET_remaining(pkt
) != 0) {
1491 *al
= SSL_AD_DECODE_ERROR
;
1492 SSLerr(SSL_F_TLS_PARSE_STOC_PSK
, SSL_R_LENGTH_MISMATCH
);
1496 if (s
->session
->ext
.tick_identity
!= (int)identity
) {
1497 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1498 SSLerr(SSL_F_TLS_PARSE_STOC_PSK
, SSL_R_BAD_PSK_IDENTITY
);