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
10 #include <openssl/ocsp.h>
11 #include "../ssl_locl.h"
12 #include "internal/cryptlib.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 uint16_t *pcurves
= NULL
;
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 tls1_get_grouplist(s
, 0, &pcurves
, &num_curves
);
154 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_groups
)
155 /* Sub-packet for supported_groups extension */
156 || !WPACKET_start_sub_packet_u16(pkt
)
157 || !WPACKET_start_sub_packet_u16(pkt
)) {
158 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
159 ERR_R_INTERNAL_ERROR
);
160 return EXT_RETURN_FAIL
;
162 /* Copy curve ID if supported */
163 for (i
= 0; i
< num_curves
; i
++) {
164 uint16_t ctmp
= pcurves
[i
];
166 if (tls_curve_allowed(s
, ctmp
, SSL_SECOP_CURVE_SUPPORTED
)) {
167 if (!WPACKET_put_bytes_u16(pkt
, ctmp
)) {
168 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
169 ERR_R_INTERNAL_ERROR
);
170 return EXT_RETURN_FAIL
;
174 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
175 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
176 ERR_R_INTERNAL_ERROR
);
177 return EXT_RETURN_FAIL
;
180 return EXT_RETURN_SENT
;
184 EXT_RETURN
tls_construct_ctos_session_ticket(SSL
*s
, WPACKET
*pkt
,
185 unsigned int context
, X509
*x
,
186 size_t chainidx
, int *al
)
190 if (!tls_use_ticket(s
))
191 return EXT_RETURN_NOT_SENT
;
193 if (!s
->new_session
&& s
->session
!= NULL
194 && s
->session
->ext
.tick
!= NULL
195 && s
->session
->ssl_version
!= TLS1_3_VERSION
) {
196 ticklen
= s
->session
->ext
.ticklen
;
197 } else if (s
->session
&& s
->ext
.session_ticket
!= NULL
198 && s
->ext
.session_ticket
->data
!= NULL
) {
199 ticklen
= s
->ext
.session_ticket
->length
;
200 s
->session
->ext
.tick
= OPENSSL_malloc(ticklen
);
201 if (s
->session
->ext
.tick
== NULL
) {
202 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
,
203 ERR_R_INTERNAL_ERROR
);
204 return EXT_RETURN_FAIL
;
206 memcpy(s
->session
->ext
.tick
,
207 s
->ext
.session_ticket
->data
, ticklen
);
208 s
->session
->ext
.ticklen
= ticklen
;
213 if (ticklen
== 0 && s
->ext
.session_ticket
!= NULL
&&
214 s
->ext
.session_ticket
->data
== NULL
)
215 return EXT_RETURN_NOT_SENT
;
217 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_session_ticket
)
218 || !WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
, ticklen
)) {
219 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
, ERR_R_INTERNAL_ERROR
);
220 return EXT_RETURN_FAIL
;
223 return EXT_RETURN_SENT
;
226 EXT_RETURN
tls_construct_ctos_sig_algs(SSL
*s
, WPACKET
*pkt
,
227 unsigned int context
, X509
*x
,
228 size_t chainidx
, int *al
)
231 const uint16_t *salg
;
233 if (!SSL_CLIENT_USE_SIGALGS(s
))
234 return EXT_RETURN_NOT_SENT
;
236 salglen
= tls12_get_psigalgs(s
, 1, &salg
);
237 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signature_algorithms
)
238 /* Sub-packet for sig-algs extension */
239 || !WPACKET_start_sub_packet_u16(pkt
)
240 /* Sub-packet for the actual list */
241 || !WPACKET_start_sub_packet_u16(pkt
)
242 || !tls12_copy_sigalgs(s
, pkt
, salg
, salglen
)
243 || !WPACKET_close(pkt
)
244 || !WPACKET_close(pkt
)) {
245 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS
, ERR_R_INTERNAL_ERROR
);
246 return EXT_RETURN_FAIL
;
249 return EXT_RETURN_SENT
;
252 #ifndef OPENSSL_NO_OCSP
253 EXT_RETURN
tls_construct_ctos_status_request(SSL
*s
, WPACKET
*pkt
,
254 unsigned int context
, X509
*x
,
255 size_t chainidx
, int *al
)
259 /* This extension isn't defined for client Certificates */
261 return EXT_RETURN_NOT_SENT
;
263 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
)
264 return EXT_RETURN_NOT_SENT
;
266 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_status_request
)
267 /* Sub-packet for status request extension */
268 || !WPACKET_start_sub_packet_u16(pkt
)
269 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_STATUSTYPE_ocsp
)
270 /* Sub-packet for the ids */
271 || !WPACKET_start_sub_packet_u16(pkt
)) {
272 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
273 return EXT_RETURN_FAIL
;
275 for (i
= 0; i
< sk_OCSP_RESPID_num(s
->ext
.ocsp
.ids
); i
++) {
276 unsigned char *idbytes
;
277 OCSP_RESPID
*id
= sk_OCSP_RESPID_value(s
->ext
.ocsp
.ids
, i
);
278 int idlen
= i2d_OCSP_RESPID(id
, NULL
);
281 /* Sub-packet for an individual id */
282 || !WPACKET_sub_allocate_bytes_u16(pkt
, idlen
, &idbytes
)
283 || i2d_OCSP_RESPID(id
, &idbytes
) != idlen
) {
284 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
285 ERR_R_INTERNAL_ERROR
);
286 return EXT_RETURN_FAIL
;
289 if (!WPACKET_close(pkt
)
290 || !WPACKET_start_sub_packet_u16(pkt
)) {
291 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
292 return EXT_RETURN_FAIL
;
294 if (s
->ext
.ocsp
.exts
) {
295 unsigned char *extbytes
;
296 int extlen
= i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, NULL
);
299 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
300 ERR_R_INTERNAL_ERROR
);
301 return EXT_RETURN_FAIL
;
303 if (!WPACKET_allocate_bytes(pkt
, extlen
, &extbytes
)
304 || i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, &extbytes
)
306 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
307 ERR_R_INTERNAL_ERROR
);
308 return EXT_RETURN_FAIL
;
311 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
312 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
313 return EXT_RETURN_FAIL
;
316 return EXT_RETURN_SENT
;
320 #ifndef OPENSSL_NO_NEXTPROTONEG
321 EXT_RETURN
tls_construct_ctos_npn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
322 X509
*x
, size_t chainidx
, int *al
)
324 if (s
->ctx
->ext
.npn_select_cb
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
325 return EXT_RETURN_NOT_SENT
;
328 * The client advertises an empty extension to indicate its support
329 * for Next Protocol Negotiation
331 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_next_proto_neg
)
332 || !WPACKET_put_bytes_u16(pkt
, 0)) {
333 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_NPN
, ERR_R_INTERNAL_ERROR
);
334 return EXT_RETURN_FAIL
;
337 return EXT_RETURN_SENT
;
341 EXT_RETURN
tls_construct_ctos_alpn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
342 X509
*x
, size_t chainidx
, int *al
)
344 s
->s3
->alpn_sent
= 0;
346 if (s
->ext
.alpn
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
347 return EXT_RETURN_NOT_SENT
;
349 if (!WPACKET_put_bytes_u16(pkt
,
350 TLSEXT_TYPE_application_layer_protocol_negotiation
)
351 /* Sub-packet ALPN extension */
352 || !WPACKET_start_sub_packet_u16(pkt
)
353 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.alpn
, s
->ext
.alpn_len
)
354 || !WPACKET_close(pkt
)) {
355 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ALPN
, ERR_R_INTERNAL_ERROR
);
356 return EXT_RETURN_FAIL
;
358 s
->s3
->alpn_sent
= 1;
360 return EXT_RETURN_SENT
;
364 #ifndef OPENSSL_NO_SRTP
365 EXT_RETURN
tls_construct_ctos_use_srtp(SSL
*s
, WPACKET
*pkt
,
366 unsigned int context
, X509
*x
,
367 size_t chainidx
, int *al
)
369 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
= SSL_get_srtp_profiles(s
);
373 return EXT_RETURN_NOT_SENT
;
375 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_use_srtp
)
376 /* Sub-packet for SRTP extension */
377 || !WPACKET_start_sub_packet_u16(pkt
)
378 /* Sub-packet for the protection profile list */
379 || !WPACKET_start_sub_packet_u16(pkt
)) {
380 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
, ERR_R_INTERNAL_ERROR
);
381 return EXT_RETURN_FAIL
;
384 end
= sk_SRTP_PROTECTION_PROFILE_num(clnt
);
385 for (i
= 0; i
< end
; i
++) {
386 const SRTP_PROTECTION_PROFILE
*prof
=
387 sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
389 if (prof
== NULL
|| !WPACKET_put_bytes_u16(pkt
, prof
->id
)) {
390 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
, ERR_R_INTERNAL_ERROR
);
391 return EXT_RETURN_FAIL
;
394 if (!WPACKET_close(pkt
)
395 /* Add an empty use_mki value */
396 || !WPACKET_put_bytes_u8(pkt
, 0)
397 || !WPACKET_close(pkt
)) {
398 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
, ERR_R_INTERNAL_ERROR
);
399 return EXT_RETURN_FAIL
;
402 return EXT_RETURN_SENT
;
406 EXT_RETURN
tls_construct_ctos_etm(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
407 X509
*x
, size_t chainidx
, int *al
)
409 if (s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
410 return EXT_RETURN_NOT_SENT
;
412 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_encrypt_then_mac
)
413 || !WPACKET_put_bytes_u16(pkt
, 0)) {
414 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_ETM
, ERR_R_INTERNAL_ERROR
);
415 return EXT_RETURN_FAIL
;
418 return EXT_RETURN_SENT
;
421 #ifndef OPENSSL_NO_CT
422 EXT_RETURN
tls_construct_ctos_sct(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
423 X509
*x
, size_t chainidx
, int *al
)
425 if (s
->ct_validation_callback
== NULL
)
426 return EXT_RETURN_NOT_SENT
;
428 /* Not defined for client Certificates */
430 return EXT_RETURN_NOT_SENT
;
432 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signed_certificate_timestamp
)
433 || !WPACKET_put_bytes_u16(pkt
, 0)) {
434 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SCT
, ERR_R_INTERNAL_ERROR
);
435 return EXT_RETURN_FAIL
;
438 return EXT_RETURN_SENT
;
442 EXT_RETURN
tls_construct_ctos_ems(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
443 X509
*x
, size_t chainidx
, int *al
)
445 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_extended_master_secret
)
446 || !WPACKET_put_bytes_u16(pkt
, 0)) {
447 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EMS
, ERR_R_INTERNAL_ERROR
);
448 return EXT_RETURN_FAIL
;
451 return EXT_RETURN_SENT
;
454 EXT_RETURN
tls_construct_ctos_supported_versions(SSL
*s
, WPACKET
*pkt
,
455 unsigned int context
, X509
*x
,
456 size_t chainidx
, int *al
)
458 int currv
, min_version
, max_version
, reason
;
460 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_versions
)
461 || !WPACKET_start_sub_packet_u16(pkt
)
462 || !WPACKET_start_sub_packet_u8(pkt
)) {
463 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
464 ERR_R_INTERNAL_ERROR
);
465 return EXT_RETURN_FAIL
;
468 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
);
470 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
, reason
);
471 return EXT_RETURN_FAIL
;
475 * TODO(TLS1.3): There is some discussion on the TLS list as to whether
476 * we should include versions <TLS1.2. For the moment we do. To be
479 for (currv
= max_version
; currv
>= min_version
; currv
--) {
480 /* TODO(TLS1.3): Remove this first if clause prior to release!! */
481 if (currv
== TLS1_3_VERSION
) {
482 if (!WPACKET_put_bytes_u16(pkt
, TLS1_3_VERSION_DRAFT
)) {
483 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
484 ERR_R_INTERNAL_ERROR
);
485 return EXT_RETURN_FAIL
;
487 } else if (!WPACKET_put_bytes_u16(pkt
, currv
)) {
488 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
489 ERR_R_INTERNAL_ERROR
);
490 return EXT_RETURN_FAIL
;
493 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
494 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
495 ERR_R_INTERNAL_ERROR
);
496 return EXT_RETURN_FAIL
;
499 return EXT_RETURN_SENT
;
503 * Construct a psk_kex_modes extension.
505 EXT_RETURN
tls_construct_ctos_psk_kex_modes(SSL
*s
, WPACKET
*pkt
,
506 unsigned int context
, X509
*x
,
507 size_t chainidx
, int *al
)
509 #ifndef OPENSSL_NO_TLS1_3
510 int nodhe
= s
->options
& SSL_OP_ALLOW_NO_DHE_KEX
;
512 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk_kex_modes
)
513 || !WPACKET_start_sub_packet_u16(pkt
)
514 || !WPACKET_start_sub_packet_u8(pkt
)
515 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE_DHE
)
516 || (nodhe
&& !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE
))
517 || !WPACKET_close(pkt
)
518 || !WPACKET_close(pkt
)) {
519 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES
, ERR_R_INTERNAL_ERROR
);
520 return EXT_RETURN_FAIL
;
523 s
->ext
.psk_kex_mode
= TLSEXT_KEX_MODE_FLAG_KE_DHE
;
525 s
->ext
.psk_kex_mode
|= TLSEXT_KEX_MODE_FLAG_KE
;
528 return EXT_RETURN_SENT
;
531 #ifndef OPENSSL_NO_TLS1_3
532 static int add_key_share(SSL
*s
, WPACKET
*pkt
, unsigned int curve_id
)
534 unsigned char *encoded_point
= NULL
;
535 EVP_PKEY
*key_share_key
= NULL
;
538 if (s
->s3
->tmp
.pkey
!= NULL
) {
539 if (!ossl_assert(s
->hello_retry_request
)) {
540 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
544 * Could happen if we got an HRR that wasn't requesting a new key_share
546 key_share_key
= s
->s3
->tmp
.pkey
;
548 key_share_key
= ssl_generate_pkey_group(curve_id
);
549 if (key_share_key
== NULL
) {
550 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_EVP_LIB
);
555 /* Encode the public key. */
556 encodedlen
= EVP_PKEY_get1_tls_encodedpoint(key_share_key
,
558 if (encodedlen
== 0) {
559 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_EC_LIB
);
563 /* Create KeyShareEntry */
564 if (!WPACKET_put_bytes_u16(pkt
, curve_id
)
565 || !WPACKET_sub_memcpy_u16(pkt
, encoded_point
, encodedlen
)) {
566 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
571 * TODO(TLS1.3): When changing to send more than one key_share we're
572 * going to need to be able to save more than one EVP_PKEY. For now
573 * we reuse the existing tmp.pkey
575 s
->s3
->tmp
.pkey
= key_share_key
;
576 s
->s3
->group_id
= curve_id
;
577 OPENSSL_free(encoded_point
);
581 if (s
->s3
->tmp
.pkey
== NULL
)
582 EVP_PKEY_free(key_share_key
);
583 OPENSSL_free(encoded_point
);
588 EXT_RETURN
tls_construct_ctos_key_share(SSL
*s
, WPACKET
*pkt
,
589 unsigned int context
, X509
*x
,
590 size_t chainidx
, int *al
)
592 #ifndef OPENSSL_NO_TLS1_3
593 size_t i
, num_curves
= 0;
594 const uint16_t *pcurves
= NULL
;
595 uint16_t curve_id
= 0;
597 /* key_share extension */
598 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_key_share
)
599 /* Extension data sub-packet */
600 || !WPACKET_start_sub_packet_u16(pkt
)
601 /* KeyShare list sub-packet */
602 || !WPACKET_start_sub_packet_u16(pkt
)) {
603 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
604 return EXT_RETURN_FAIL
;
607 tls1_get_grouplist(s
, 0, &pcurves
, &num_curves
);
610 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
613 if (s
->s3
->group_id
!= 0) {
614 curve_id
= s
->s3
->group_id
;
616 for (i
= 0; i
< num_curves
; i
++) {
618 if (!tls_curve_allowed(s
, pcurves
[i
], SSL_SECOP_CURVE_SUPPORTED
))
621 curve_id
= pcurves
[i
];
627 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, SSL_R_NO_SUITABLE_KEY_SHARE
);
628 return EXT_RETURN_FAIL
;
631 if (!add_key_share(s
, pkt
, curve_id
))
632 return EXT_RETURN_FAIL
;
634 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
635 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
636 return EXT_RETURN_FAIL
;
640 return EXT_RETURN_SENT
;
643 EXT_RETURN
tls_construct_ctos_cookie(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
644 X509
*x
, size_t chainidx
, int *al
)
646 EXT_RETURN ret
= EXT_RETURN_FAIL
;
648 /* Should only be set if we've had an HRR */
649 if (s
->ext
.tls13_cookie_len
== 0)
650 return EXT_RETURN_NOT_SENT
;
652 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_cookie
)
653 /* Extension data sub-packet */
654 || !WPACKET_start_sub_packet_u16(pkt
)
655 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.tls13_cookie
,
656 s
->ext
.tls13_cookie_len
)
657 || !WPACKET_close(pkt
)) {
658 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_COOKIE
, ERR_R_INTERNAL_ERROR
);
662 ret
= EXT_RETURN_SENT
;
664 OPENSSL_free(s
->ext
.tls13_cookie
);
665 s
->ext
.tls13_cookie
= NULL
;
666 s
->ext
.tls13_cookie_len
= 0;
671 EXT_RETURN
tls_construct_ctos_early_data(SSL
*s
, WPACKET
*pkt
,
672 unsigned int context
, X509
*x
,
673 size_t chainidx
, int *al
)
675 const unsigned char *id
= NULL
;
677 SSL_SESSION
*psksess
= NULL
;
678 SSL_SESSION
*edsess
= NULL
;
679 const EVP_MD
*handmd
= NULL
;
681 if (s
->hello_retry_request
)
682 handmd
= ssl_handshake_md(s
);
684 if (s
->psk_use_session_cb
!= NULL
685 && (!s
->psk_use_session_cb(s
, handmd
, &id
, &idlen
, &psksess
)
687 && psksess
->ssl_version
!= TLS1_3_VERSION
))) {
688 SSL_SESSION_free(psksess
);
689 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, SSL_R_BAD_PSK
);
690 return EXT_RETURN_FAIL
;
693 SSL_SESSION_free(s
->psksession
);
694 s
->psksession
= psksess
;
695 if (psksess
!= NULL
) {
696 OPENSSL_free(s
->psksession_id
);
697 s
->psksession_id
= OPENSSL_memdup(id
, idlen
);
698 if (s
->psksession_id
== NULL
) {
699 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
700 return EXT_RETURN_FAIL
;
702 s
->psksession_id_len
= idlen
;
705 if (s
->early_data_state
!= SSL_EARLY_DATA_CONNECTING
706 || (s
->session
->ext
.max_early_data
== 0
707 && (psksess
== NULL
|| psksess
->ext
.max_early_data
== 0))) {
708 s
->max_early_data
= 0;
709 return EXT_RETURN_NOT_SENT
;
711 edsess
= s
->session
->ext
.max_early_data
!= 0 ? s
->session
: psksess
;
712 s
->max_early_data
= edsess
->ext
.max_early_data
;
714 if ((s
->ext
.hostname
== NULL
&& edsess
->ext
.hostname
!= NULL
)
715 || (s
->ext
.hostname
!= NULL
716 && (edsess
->ext
.hostname
== NULL
717 || strcmp(s
->ext
.hostname
, edsess
->ext
.hostname
) != 0))) {
718 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
719 SSL_R_INCONSISTENT_EARLY_DATA_SNI
);
720 return EXT_RETURN_FAIL
;
723 if ((s
->ext
.alpn
== NULL
&& edsess
->ext
.alpn_selected
!= NULL
)) {
724 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
725 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
726 return EXT_RETURN_FAIL
;
730 * Verify that we are offering an ALPN protocol consistent with the early
733 if (edsess
->ext
.alpn_selected
!= NULL
) {
734 PACKET prots
, alpnpkt
;
737 if (!PACKET_buf_init(&prots
, s
->ext
.alpn
, s
->ext
.alpn_len
)) {
738 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
739 return EXT_RETURN_FAIL
;
741 while (PACKET_get_length_prefixed_1(&prots
, &alpnpkt
)) {
742 if (PACKET_equal(&alpnpkt
, edsess
->ext
.alpn_selected
,
743 edsess
->ext
.alpn_selected_len
)) {
749 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
750 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
751 return EXT_RETURN_FAIL
;
755 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_early_data
)
756 || !WPACKET_start_sub_packet_u16(pkt
)
757 || !WPACKET_close(pkt
)) {
758 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
759 return EXT_RETURN_FAIL
;
763 * We set this to rejected here. Later, if the server acknowledges the
764 * extension, we set it to accepted.
766 s
->ext
.early_data
= SSL_EARLY_DATA_REJECTED
;
767 s
->ext
.early_data_ok
= 1;
769 return EXT_RETURN_SENT
;
772 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
773 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
776 * PSK pre binder overhead =
777 * 2 bytes for TLSEXT_TYPE_psk
778 * 2 bytes for extension length
779 * 2 bytes for identities list length
780 * 2 bytes for identity length
781 * 4 bytes for obfuscated_ticket_age
782 * 2 bytes for binder list length
783 * 1 byte for binder length
784 * The above excludes the number of bytes for the identity itself and the
785 * subsequent binder bytes
787 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
789 EXT_RETURN
tls_construct_ctos_padding(SSL
*s
, WPACKET
*pkt
,
790 unsigned int context
, X509
*x
,
791 size_t chainidx
, int *al
)
793 unsigned char *padbytes
;
796 if ((s
->options
& SSL_OP_TLSEXT_PADDING
) == 0)
797 return EXT_RETURN_NOT_SENT
;
800 * Add padding to workaround bugs in F5 terminators. See RFC7685.
801 * This code calculates the length of all extensions added so far but
802 * excludes the PSK extension (because that MUST be written last). Therefore
803 * this extension MUST always appear second to last.
805 if (!WPACKET_get_total_written(pkt
, &hlen
)) {
806 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING
, ERR_R_INTERNAL_ERROR
);
807 return EXT_RETURN_FAIL
;
811 * If we're going to send a PSK then that will be written out after this
812 * extension, so we need to calculate how long it is going to be.
814 if (s
->session
->ssl_version
== TLS1_3_VERSION
815 && s
->session
->ext
.ticklen
!= 0
816 && s
->session
->cipher
!= NULL
) {
817 const EVP_MD
*md
= ssl_md(s
->session
->cipher
->algorithm2
);
821 * Add the fixed PSK overhead, the identity length and the binder
824 hlen
+= PSK_PRE_BINDER_OVERHEAD
+ s
->session
->ext
.ticklen
829 if (hlen
> F5_WORKAROUND_MIN_MSG_LEN
&& hlen
< F5_WORKAROUND_MAX_MSG_LEN
) {
830 /* Calculate the amount of padding we need to add */
831 hlen
= F5_WORKAROUND_MAX_MSG_LEN
- hlen
;
834 * Take off the size of extension header itself (2 bytes for type and
835 * 2 bytes for length bytes), but ensure that the extension is at least
836 * 1 byte long so as not to have an empty extension last (WebSphere 7.x,
837 * 8.x are intolerant of that condition)
844 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_padding
)
845 || !WPACKET_sub_allocate_bytes_u16(pkt
, hlen
, &padbytes
)) {
846 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING
, ERR_R_INTERNAL_ERROR
);
847 return EXT_RETURN_FAIL
;
849 memset(padbytes
, 0, hlen
);
852 return EXT_RETURN_SENT
;
856 * Construct the pre_shared_key extension
858 EXT_RETURN
tls_construct_ctos_psk(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
859 X509
*x
, size_t chainidx
, int *al
)
861 #ifndef OPENSSL_NO_TLS1_3
862 uint32_t now
, agesec
, agems
= 0;
863 size_t reshashsize
= 0, pskhashsize
= 0, binderoffset
, msglen
;
864 unsigned char *resbinder
= NULL
, *pskbinder
= NULL
, *msgstart
= NULL
;
865 const EVP_MD
*handmd
= NULL
, *mdres
= NULL
, *mdpsk
= NULL
;
866 EXT_RETURN ret
= EXT_RETURN_FAIL
;
869 s
->session
->ext
.tick_identity
= TLSEXT_PSK_BAD_IDENTITY
;
872 * Note: At this stage of the code we only support adding a single
873 * resumption PSK. If we add support for multiple PSKs then the length
874 * calculations in the padding extension will need to be adjusted.
878 * If this is an incompatible or new session then we have nothing to resume
879 * so don't add this extension.
881 if (s
->session
->ssl_version
!= TLS1_3_VERSION
882 || (s
->session
->ext
.ticklen
== 0 && s
->psksession
== NULL
))
883 return EXT_RETURN_NOT_SENT
;
885 if (s
->hello_retry_request
)
886 handmd
= ssl_handshake_md(s
);
888 if (s
->session
->ext
.ticklen
!= 0) {
889 /* Get the digest associated with the ciphersuite in the session */
890 if (s
->session
->cipher
== NULL
) {
891 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
894 mdres
= ssl_md(s
->session
->cipher
->algorithm2
);
897 * Don't recognize this cipher so we can't use the session.
903 if (s
->hello_retry_request
&& mdres
!= handmd
) {
905 * Selected ciphersuite hash does not match the hash for the session
906 * so we can't use it.
912 * Technically the C standard just says time() returns a time_t and says
913 * nothing about the encoding of that type. In practice most
914 * implementations follow POSIX which holds it as an integral type in
915 * seconds since epoch. We've already made the assumption that we can do
916 * this in multiple places in the code, so portability shouldn't be an
919 now
= (uint32_t)time(NULL
);
920 agesec
= now
- (uint32_t)s
->session
->time
;
922 if (s
->session
->ext
.tick_lifetime_hint
< agesec
) {
923 /* Ticket is too old. Ignore it. */
928 * Calculate age in ms. We're just doing it to nearest second. Should be
931 agems
= agesec
* (uint32_t)1000;
933 if (agesec
!= 0 && agems
/ (uint32_t)1000 != agesec
) {
935 * Overflow. Shouldn't happen unless this is a *really* old session.
936 * If so we just ignore it.
942 * Obfuscate the age. Overflow here is fine, this addition is supposed
945 agems
+= s
->session
->ext
.tick_age_add
;
947 reshashsize
= EVP_MD_size(mdres
);
952 if (!dores
&& s
->psksession
== NULL
)
953 return EXT_RETURN_NOT_SENT
;
955 if (s
->psksession
!= NULL
) {
956 mdpsk
= ssl_md(s
->psksession
->cipher
->algorithm2
);
959 * Don't recognize this cipher so we can't use the session.
960 * If this happens it's an application bug.
962 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, SSL_R_BAD_PSK
);
966 if (s
->hello_retry_request
&& mdpsk
!= handmd
) {
968 * Selected ciphersuite hash does not match the hash for the PSK
969 * session. This is an application bug.
971 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, SSL_R_BAD_PSK
);
975 pskhashsize
= EVP_MD_size(mdpsk
);
978 /* Create the extension, but skip over the binder for now */
979 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk
)
980 || !WPACKET_start_sub_packet_u16(pkt
)
981 || !WPACKET_start_sub_packet_u16(pkt
)) {
982 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
987 if (!WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
,
988 s
->session
->ext
.ticklen
)
989 || !WPACKET_put_bytes_u32(pkt
, agems
)) {
990 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
995 if (s
->psksession
!= NULL
) {
996 if (!WPACKET_sub_memcpy_u16(pkt
, s
->psksession_id
,
997 s
->psksession_id_len
)
998 || !WPACKET_put_bytes_u32(pkt
, 0)) {
999 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
1004 if (!WPACKET_close(pkt
)
1005 || !WPACKET_get_total_written(pkt
, &binderoffset
)
1006 || !WPACKET_start_sub_packet_u16(pkt
)
1008 && !WPACKET_sub_allocate_bytes_u8(pkt
, reshashsize
, &resbinder
))
1009 || (s
->psksession
!= NULL
1010 && !WPACKET_sub_allocate_bytes_u8(pkt
, pskhashsize
, &pskbinder
))
1011 || !WPACKET_close(pkt
)
1012 || !WPACKET_close(pkt
)
1013 || !WPACKET_get_total_written(pkt
, &msglen
)
1015 * We need to fill in all the sub-packet lengths now so we can
1016 * calculate the HMAC of the message up to the binders
1018 || !WPACKET_fill_lengths(pkt
)) {
1019 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
1023 msgstart
= WPACKET_get_curr(pkt
) - msglen
;
1026 && tls_psk_do_binder(s
, mdres
, msgstart
, binderoffset
, NULL
,
1027 resbinder
, s
->session
, 1, 0) != 1) {
1028 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
1032 if (s
->psksession
!= NULL
1033 && tls_psk_do_binder(s
, mdpsk
, msgstart
, binderoffset
, NULL
,
1034 pskbinder
, s
->psksession
, 1, 1) != 1) {
1035 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
1040 s
->session
->ext
.tick_identity
= 0;
1041 if (s
->psksession
!= NULL
)
1042 s
->psksession
->ext
.tick_identity
= (dores
? 1 : 0);
1044 ret
= EXT_RETURN_SENT
;
1048 return EXT_RETURN_NOT_SENT
;
1053 * Parse the server's renegotiation binding and abort if it's not right
1055 int tls_parse_stoc_renegotiate(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1056 X509
*x
, size_t chainidx
, int *al
)
1058 size_t expected_len
= s
->s3
->previous_client_finished_len
1059 + s
->s3
->previous_server_finished_len
;
1061 const unsigned char *data
;
1063 /* Check for logic errors */
1064 if (!ossl_assert(expected_len
== 0
1065 || s
->s3
->previous_client_finished_len
!= 0)
1066 || !ossl_assert(expected_len
== 0
1067 || s
->s3
->previous_server_finished_len
!= 0)) {
1068 *al
= SSL_AD_INTERNAL_ERROR
;
1072 /* Parse the length byte */
1073 if (!PACKET_get_1_len(pkt
, &ilen
)) {
1074 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1075 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1076 *al
= SSL_AD_DECODE_ERROR
;
1080 /* Consistency check */
1081 if (PACKET_remaining(pkt
) != ilen
) {
1082 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1083 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1084 *al
= SSL_AD_DECODE_ERROR
;
1088 /* Check that the extension matches */
1089 if (ilen
!= expected_len
) {
1090 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1091 SSL_R_RENEGOTIATION_MISMATCH
);
1092 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1096 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
->previous_client_finished_len
)
1097 || memcmp(data
, s
->s3
->previous_client_finished
,
1098 s
->s3
->previous_client_finished_len
) != 0) {
1099 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1100 SSL_R_RENEGOTIATION_MISMATCH
);
1101 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1105 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
->previous_server_finished_len
)
1106 || memcmp(data
, s
->s3
->previous_server_finished
,
1107 s
->s3
->previous_server_finished_len
) != 0) {
1108 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1109 SSL_R_RENEGOTIATION_MISMATCH
);
1110 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1113 s
->s3
->send_connection_binding
= 1;
1118 int tls_parse_stoc_server_name(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1119 X509
*x
, size_t chainidx
, int *al
)
1121 if (s
->ext
.hostname
== NULL
) {
1122 *al
= SSL_AD_INTERNAL_ERROR
;
1126 if (PACKET_remaining(pkt
) > 0) {
1127 *al
= SSL_AD_DECODE_ERROR
;
1132 if (s
->session
->ext
.hostname
!= NULL
) {
1133 *al
= SSL_AD_INTERNAL_ERROR
;
1136 s
->session
->ext
.hostname
= OPENSSL_strdup(s
->ext
.hostname
);
1137 if (s
->session
->ext
.hostname
== NULL
) {
1138 *al
= SSL_AD_INTERNAL_ERROR
;
1146 #ifndef OPENSSL_NO_EC
1147 int tls_parse_stoc_ec_pt_formats(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1148 X509
*x
, size_t chainidx
, int *al
)
1150 unsigned int ecpointformats_len
;
1151 PACKET ecptformatlist
;
1153 if (!PACKET_as_length_prefixed_1(pkt
, &ecptformatlist
)) {
1154 *al
= SSL_AD_DECODE_ERROR
;
1158 ecpointformats_len
= PACKET_remaining(&ecptformatlist
);
1159 s
->session
->ext
.ecpointformats_len
= 0;
1161 OPENSSL_free(s
->session
->ext
.ecpointformats
);
1162 s
->session
->ext
.ecpointformats
= OPENSSL_malloc(ecpointformats_len
);
1163 if (s
->session
->ext
.ecpointformats
== NULL
) {
1164 *al
= SSL_AD_INTERNAL_ERROR
;
1168 s
->session
->ext
.ecpointformats_len
= ecpointformats_len
;
1170 if (!PACKET_copy_bytes(&ecptformatlist
,
1171 s
->session
->ext
.ecpointformats
,
1172 ecpointformats_len
)) {
1173 *al
= SSL_AD_INTERNAL_ERROR
;
1182 int tls_parse_stoc_session_ticket(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1183 X509
*x
, size_t chainidx
, int *al
)
1185 if (s
->ext
.session_ticket_cb
!= NULL
&&
1186 !s
->ext
.session_ticket_cb(s
, PACKET_data(pkt
),
1187 PACKET_remaining(pkt
),
1188 s
->ext
.session_ticket_cb_arg
)) {
1189 *al
= SSL_AD_INTERNAL_ERROR
;
1193 if (!tls_use_ticket(s
)) {
1194 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1197 if (PACKET_remaining(pkt
) > 0) {
1198 *al
= SSL_AD_DECODE_ERROR
;
1202 s
->ext
.ticket_expected
= 1;
1207 #ifndef OPENSSL_NO_OCSP
1208 int tls_parse_stoc_status_request(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1209 X509
*x
, size_t chainidx
, int *al
)
1212 * MUST only be sent if we've requested a status
1213 * request message. In TLS <= 1.2 it must also be empty.
1215 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
) {
1216 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1219 if (!SSL_IS_TLS13(s
) && PACKET_remaining(pkt
) > 0) {
1220 *al
= SSL_AD_DECODE_ERROR
;
1224 if (SSL_IS_TLS13(s
)) {
1225 /* We only know how to handle this if it's for the first Certificate in
1226 * the chain. We ignore any other responses.
1230 return tls_process_cert_status_body(s
, pkt
, al
);
1233 /* Set flag to expect CertificateStatus message */
1234 s
->ext
.status_expected
= 1;
1241 #ifndef OPENSSL_NO_CT
1242 int tls_parse_stoc_sct(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1243 size_t chainidx
, int *al
)
1246 * Only take it if we asked for it - i.e if there is no CT validation
1247 * callback set, then a custom extension MAY be processing it, so we
1248 * need to let control continue to flow to that.
1250 if (s
->ct_validation_callback
!= NULL
) {
1251 size_t size
= PACKET_remaining(pkt
);
1253 /* Simply copy it off for later processing */
1254 OPENSSL_free(s
->ext
.scts
);
1257 s
->ext
.scts_len
= size
;
1259 s
->ext
.scts
= OPENSSL_malloc(size
);
1260 if (s
->ext
.scts
== NULL
1261 || !PACKET_copy_bytes(pkt
, s
->ext
.scts
, size
)) {
1262 *al
= SSL_AD_INTERNAL_ERROR
;
1267 ENDPOINT role
= (context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0
1268 ? ENDPOINT_CLIENT
: ENDPOINT_BOTH
;
1271 * If we didn't ask for it then there must be a custom extension,
1272 * otherwise this is unsolicited.
1274 if (custom_ext_find(&s
->cert
->custext
, role
,
1275 TLSEXT_TYPE_signed_certificate_timestamp
,
1277 *al
= TLS1_AD_UNSUPPORTED_EXTENSION
;
1281 if (custom_ext_parse(s
, context
,
1282 TLSEXT_TYPE_signed_certificate_timestamp
,
1283 PACKET_data(pkt
), PACKET_remaining(pkt
),
1284 x
, chainidx
, al
) <= 0)
1293 #ifndef OPENSSL_NO_NEXTPROTONEG
1295 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1296 * elements of zero length are allowed and the set of elements must exactly
1297 * fill the length of the block. Returns 1 on success or 0 on failure.
1299 static int ssl_next_proto_validate(PACKET
*pkt
)
1301 PACKET tmp_protocol
;
1303 while (PACKET_remaining(pkt
)) {
1304 if (!PACKET_get_length_prefixed_1(pkt
, &tmp_protocol
)
1305 || PACKET_remaining(&tmp_protocol
) == 0)
1312 int tls_parse_stoc_npn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1313 size_t chainidx
, int *al
)
1315 unsigned char *selected
;
1316 unsigned char selected_len
;
1319 /* Check if we are in a renegotiation. If so ignore this extension */
1320 if (!SSL_IS_FIRST_HANDSHAKE(s
))
1323 /* We must have requested it. */
1324 if (s
->ctx
->ext
.npn_select_cb
== NULL
) {
1325 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1329 /* The data must be valid */
1331 if (!ssl_next_proto_validate(&tmppkt
)) {
1332 *al
= SSL_AD_DECODE_ERROR
;
1335 if (s
->ctx
->ext
.npn_select_cb(s
, &selected
, &selected_len
,
1337 PACKET_remaining(pkt
),
1338 s
->ctx
->ext
.npn_select_cb_arg
) !=
1339 SSL_TLSEXT_ERR_OK
) {
1340 *al
= SSL_AD_INTERNAL_ERROR
;
1345 * Could be non-NULL if server has sent multiple NPN extensions in
1346 * a single Serverhello
1348 OPENSSL_free(s
->ext
.npn
);
1349 s
->ext
.npn
= OPENSSL_malloc(selected_len
);
1350 if (s
->ext
.npn
== NULL
) {
1351 *al
= SSL_AD_INTERNAL_ERROR
;
1355 memcpy(s
->ext
.npn
, selected
, selected_len
);
1356 s
->ext
.npn_len
= selected_len
;
1357 s
->s3
->npn_seen
= 1;
1363 int tls_parse_stoc_alpn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1364 size_t chainidx
, int *al
)
1368 /* We must have requested it. */
1369 if (!s
->s3
->alpn_sent
) {
1370 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1374 * The extension data consists of:
1375 * uint16 list_length
1376 * uint8 proto_length;
1377 * uint8 proto[proto_length];
1379 if (!PACKET_get_net_2_len(pkt
, &len
)
1380 || PACKET_remaining(pkt
) != len
|| !PACKET_get_1_len(pkt
, &len
)
1381 || PACKET_remaining(pkt
) != len
) {
1382 *al
= SSL_AD_DECODE_ERROR
;
1385 OPENSSL_free(s
->s3
->alpn_selected
);
1386 s
->s3
->alpn_selected
= OPENSSL_malloc(len
);
1387 if (s
->s3
->alpn_selected
== NULL
) {
1388 *al
= SSL_AD_INTERNAL_ERROR
;
1391 if (!PACKET_copy_bytes(pkt
, s
->s3
->alpn_selected
, len
)) {
1392 *al
= SSL_AD_DECODE_ERROR
;
1395 s
->s3
->alpn_selected_len
= len
;
1397 if (s
->session
->ext
.alpn_selected
== NULL
1398 || s
->session
->ext
.alpn_selected_len
!= len
1399 || memcmp(s
->session
->ext
.alpn_selected
, s
->s3
->alpn_selected
, len
)
1401 /* ALPN not consistent with the old session so cannot use early_data */
1402 s
->ext
.early_data_ok
= 0;
1405 /* If a new session then update it with the selected ALPN */
1406 s
->session
->ext
.alpn_selected
=
1407 OPENSSL_memdup(s
->s3
->alpn_selected
, s
->s3
->alpn_selected_len
);
1408 if (s
->session
->ext
.alpn_selected
== NULL
) {
1409 *al
= SSL_AD_INTERNAL_ERROR
;
1412 s
->session
->ext
.alpn_selected_len
= s
->s3
->alpn_selected_len
;
1418 #ifndef OPENSSL_NO_SRTP
1419 int tls_parse_stoc_use_srtp(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1420 size_t chainidx
, int *al
)
1422 unsigned int id
, ct
, mki
;
1424 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
;
1425 SRTP_PROTECTION_PROFILE
*prof
;
1427 if (!PACKET_get_net_2(pkt
, &ct
) || ct
!= 2
1428 || !PACKET_get_net_2(pkt
, &id
)
1429 || !PACKET_get_1(pkt
, &mki
)
1430 || PACKET_remaining(pkt
) != 0) {
1431 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1432 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1433 *al
= SSL_AD_DECODE_ERROR
;
1438 /* Must be no MKI, since we never offer one */
1439 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
, SSL_R_BAD_SRTP_MKI_VALUE
);
1440 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1444 /* Throw an error if the server gave us an unsolicited extension */
1445 clnt
= SSL_get_srtp_profiles(s
);
1447 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
, SSL_R_NO_SRTP_PROFILES
);
1448 *al
= SSL_AD_DECODE_ERROR
;
1453 * Check to see if the server gave us something we support (and
1454 * presumably offered)
1456 for (i
= 0; i
< sk_SRTP_PROTECTION_PROFILE_num(clnt
); i
++) {
1457 prof
= sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
1459 if (prof
->id
== id
) {
1460 s
->srtp_profile
= prof
;
1466 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1467 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1468 *al
= SSL_AD_DECODE_ERROR
;
1473 int tls_parse_stoc_etm(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1474 size_t chainidx
, int *al
)
1476 /* Ignore if inappropriate ciphersuite */
1477 if (!(s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
1478 && s
->s3
->tmp
.new_cipher
->algorithm_mac
!= SSL_AEAD
1479 && s
->s3
->tmp
.new_cipher
->algorithm_enc
!= SSL_RC4
)
1485 int tls_parse_stoc_ems(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1486 size_t chainidx
, int *al
)
1488 s
->s3
->flags
|= TLS1_FLAGS_RECEIVED_EXTMS
;
1490 s
->session
->flags
|= SSL_SESS_FLAG_EXTMS
;
1495 int tls_parse_stoc_key_share(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1496 size_t chainidx
, int *al
)
1498 #ifndef OPENSSL_NO_TLS1_3
1499 unsigned int group_id
;
1501 EVP_PKEY
*ckey
= s
->s3
->tmp
.pkey
, *skey
= NULL
;
1504 if (ckey
== NULL
|| s
->s3
->peer_tmp
!= NULL
) {
1505 *al
= SSL_AD_INTERNAL_ERROR
;
1506 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1510 if (!PACKET_get_net_2(pkt
, &group_id
)) {
1511 *al
= SSL_AD_DECODE_ERROR
;
1512 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_LENGTH_MISMATCH
);
1516 if ((context
& SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
) != 0) {
1517 const uint16_t *pcurves
= NULL
;
1518 size_t i
, num_curves
;
1520 if (PACKET_remaining(pkt
) != 0) {
1521 *al
= SSL_AD_DECODE_ERROR
;
1522 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_LENGTH_MISMATCH
);
1527 * It is an error if the HelloRetryRequest wants a key_share that we
1528 * already sent in the first ClientHello
1530 if (group_id
== s
->s3
->group_id
) {
1531 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1532 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1536 /* Validate the selected group is one we support */
1537 tls1_get_grouplist(s
, 0, &pcurves
, &num_curves
);
1538 for (i
= 0; i
< num_curves
; i
++) {
1539 if (group_id
== pcurves
[i
])
1543 || !tls_curve_allowed(s
, group_id
, SSL_SECOP_CURVE_SUPPORTED
)) {
1544 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1545 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1549 s
->s3
->group_id
= group_id
;
1550 EVP_PKEY_free(s
->s3
->tmp
.pkey
);
1551 s
->s3
->tmp
.pkey
= NULL
;
1555 if (group_id
!= s
->s3
->group_id
) {
1557 * This isn't for the group that we sent in the original
1560 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1561 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1565 if (!PACKET_as_length_prefixed_2(pkt
, &encoded_pt
)
1566 || PACKET_remaining(&encoded_pt
) == 0) {
1567 *al
= SSL_AD_DECODE_ERROR
;
1568 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_LENGTH_MISMATCH
);
1572 skey
= ssl_generate_pkey(ckey
);
1574 *al
= SSL_AD_INTERNAL_ERROR
;
1575 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_MALLOC_FAILURE
);
1578 if (!EVP_PKEY_set1_tls_encodedpoint(skey
, PACKET_data(&encoded_pt
),
1579 PACKET_remaining(&encoded_pt
))) {
1580 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1581 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_ECPOINT
);
1582 EVP_PKEY_free(skey
);
1586 if (ssl_derive(s
, ckey
, skey
, 1) == 0) {
1587 *al
= SSL_AD_INTERNAL_ERROR
;
1588 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1589 EVP_PKEY_free(skey
);
1592 s
->s3
->peer_tmp
= skey
;
1598 int tls_parse_stoc_cookie(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1599 size_t chainidx
, int *al
)
1603 if (!PACKET_as_length_prefixed_2(pkt
, &cookie
)
1604 || !PACKET_memdup(&cookie
, &s
->ext
.tls13_cookie
,
1605 &s
->ext
.tls13_cookie_len
)) {
1606 *al
= SSL_AD_DECODE_ERROR
;
1607 SSLerr(SSL_F_TLS_PARSE_STOC_COOKIE
, SSL_R_LENGTH_MISMATCH
);
1614 int tls_parse_stoc_early_data(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1615 X509
*x
, size_t chainidx
, int *al
)
1617 if (context
== SSL_EXT_TLS1_3_NEW_SESSION_TICKET
) {
1618 unsigned long max_early_data
;
1620 if (!PACKET_get_net_4(pkt
, &max_early_data
)
1621 || PACKET_remaining(pkt
) != 0) {
1622 SSLerr(SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1623 SSL_R_INVALID_MAX_EARLY_DATA
);
1624 *al
= SSL_AD_DECODE_ERROR
;
1628 s
->session
->ext
.max_early_data
= max_early_data
;
1633 if (PACKET_remaining(pkt
) != 0) {
1634 *al
= SSL_AD_DECODE_ERROR
;
1638 if (!s
->ext
.early_data_ok
1640 || s
->session
->ext
.tick_identity
!= 0) {
1642 * If we get here then we didn't send early data, or we didn't resume
1643 * using the first identity, or the SNI/ALPN is not consistent so the
1644 * server should not be accepting it.
1646 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1650 s
->ext
.early_data
= SSL_EARLY_DATA_ACCEPTED
;
1655 int tls_parse_stoc_psk(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1656 size_t chainidx
, int *al
)
1658 #ifndef OPENSSL_NO_TLS1_3
1659 unsigned int identity
;
1661 if (!PACKET_get_net_2(pkt
, &identity
) || PACKET_remaining(pkt
) != 0) {
1662 *al
= SSL_AD_DECODE_ERROR
;
1663 SSLerr(SSL_F_TLS_PARSE_STOC_PSK
, SSL_R_LENGTH_MISMATCH
);
1667 if (s
->session
->ext
.tick_identity
== (int)identity
) {
1669 SSL_SESSION_free(s
->psksession
);
1670 s
->psksession
= NULL
;
1674 if (s
->psksession
== NULL
1675 || s
->psksession
->ext
.tick_identity
!= (int)identity
) {
1676 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1677 SSLerr(SSL_F_TLS_PARSE_STOC_PSK
, SSL_R_BAD_PSK_IDENTITY
);
1682 * If we used the external PSK for sending early_data then s->early_secret
1683 * is already set up, so don't overwrite it. Otherwise we copy the
1684 * early_secret across that we generated earlier.
1686 if ((s
->early_data_state
!= SSL_EARLY_DATA_WRITE_RETRY
1687 && s
->early_data_state
!= SSL_EARLY_DATA_FINISHED_WRITING
)
1688 || s
->session
->ext
.max_early_data
> 0
1689 || s
->psksession
->ext
.max_early_data
== 0)
1690 memcpy(s
->early_secret
, s
->psksession
->early_secret
, EVP_MAX_MD_SIZE
);
1692 SSL_SESSION_free(s
->session
);
1693 s
->session
= s
->psksession
;
1694 s
->psksession
= NULL
;