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 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.
509 EXT_RETURN
tls_construct_ctos_psk_kex_modes(SSL
*s
, WPACKET
*pkt
,
510 unsigned int context
, X509
*x
,
511 size_t chainidx
, int *al
)
513 #ifndef OPENSSL_NO_TLS1_3
514 int nodhe
= s
->options
& SSL_OP_ALLOW_NO_DHE_KEX
;
516 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk_kex_modes
)
517 || !WPACKET_start_sub_packet_u16(pkt
)
518 || !WPACKET_start_sub_packet_u8(pkt
)
519 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE_DHE
)
520 || (nodhe
&& !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE
))
521 || !WPACKET_close(pkt
)
522 || !WPACKET_close(pkt
)) {
523 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES
, ERR_R_INTERNAL_ERROR
);
524 return EXT_RETURN_FAIL
;
527 s
->ext
.psk_kex_mode
= TLSEXT_KEX_MODE_FLAG_KE_DHE
;
529 s
->ext
.psk_kex_mode
|= TLSEXT_KEX_MODE_FLAG_KE
;
532 return EXT_RETURN_SENT
;
535 #ifndef OPENSSL_NO_TLS1_3
536 static int add_key_share(SSL
*s
, WPACKET
*pkt
, unsigned int curve_id
)
538 unsigned char *encoded_point
= NULL
;
539 EVP_PKEY
*key_share_key
= NULL
;
542 if (s
->s3
->tmp
.pkey
!= NULL
) {
543 if (!ossl_assert(s
->hello_retry_request
)) {
544 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
548 * Could happen if we got an HRR that wasn't requesting a new key_share
550 key_share_key
= s
->s3
->tmp
.pkey
;
552 key_share_key
= ssl_generate_pkey_curve(curve_id
);
553 if (key_share_key
== NULL
) {
554 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_EVP_LIB
);
559 /* Encode the public key. */
560 encodedlen
= EVP_PKEY_get1_tls_encodedpoint(key_share_key
,
562 if (encodedlen
== 0) {
563 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_EC_LIB
);
567 /* Create KeyShareEntry */
568 if (!WPACKET_put_bytes_u16(pkt
, curve_id
)
569 || !WPACKET_sub_memcpy_u16(pkt
, encoded_point
, encodedlen
)) {
570 SSLerr(SSL_F_ADD_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
575 * TODO(TLS1.3): When changing to send more than one key_share we're
576 * going to need to be able to save more than one EVP_PKEY. For now
577 * we reuse the existing tmp.pkey
579 s
->s3
->tmp
.pkey
= key_share_key
;
580 s
->s3
->group_id
= curve_id
;
581 OPENSSL_free(encoded_point
);
585 if (s
->s3
->tmp
.pkey
== NULL
)
586 EVP_PKEY_free(key_share_key
);
587 OPENSSL_free(encoded_point
);
592 EXT_RETURN
tls_construct_ctos_key_share(SSL
*s
, WPACKET
*pkt
,
593 unsigned int context
, X509
*x
,
594 size_t chainidx
, int *al
)
596 #ifndef OPENSSL_NO_TLS1_3
597 size_t i
, num_curves
= 0;
598 const unsigned char *pcurves
= NULL
;
599 unsigned int curve_id
= 0;
601 /* key_share extension */
602 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_key_share
)
603 /* Extension data sub-packet */
604 || !WPACKET_start_sub_packet_u16(pkt
)
605 /* KeyShare list sub-packet */
606 || !WPACKET_start_sub_packet_u16(pkt
)) {
607 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
608 return EXT_RETURN_FAIL
;
611 if (!tls1_get_curvelist(s
, 0, &pcurves
, &num_curves
)) {
612 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
613 return EXT_RETURN_FAIL
;
617 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
620 if (s
->s3
->group_id
!= 0) {
621 curve_id
= s
->s3
->group_id
;
623 for (i
= 0; i
< num_curves
; i
++, pcurves
+= 2) {
625 if (!tls_curve_allowed(s
, pcurves
, SSL_SECOP_CURVE_SUPPORTED
))
628 curve_id
= bytestogroup(pcurves
);
634 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, SSL_R_NO_SUITABLE_KEY_SHARE
);
635 return EXT_RETURN_FAIL
;
638 if (!add_key_share(s
, pkt
, curve_id
))
639 return EXT_RETURN_FAIL
;
641 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
642 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
643 return EXT_RETURN_FAIL
;
647 return EXT_RETURN_SENT
;
650 EXT_RETURN
tls_construct_ctos_cookie(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
651 X509
*x
, size_t chainidx
, int *al
)
653 EXT_RETURN ret
= EXT_RETURN_FAIL
;
655 /* Should only be set if we've had an HRR */
656 if (s
->ext
.tls13_cookie_len
== 0)
657 return EXT_RETURN_NOT_SENT
;
659 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_cookie
)
660 /* Extension data sub-packet */
661 || !WPACKET_start_sub_packet_u16(pkt
)
662 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.tls13_cookie
,
663 s
->ext
.tls13_cookie_len
)
664 || !WPACKET_close(pkt
)) {
665 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_COOKIE
, ERR_R_INTERNAL_ERROR
);
669 ret
= EXT_RETURN_SENT
;
671 OPENSSL_free(s
->ext
.tls13_cookie
);
672 s
->ext
.tls13_cookie
= NULL
;
673 s
->ext
.tls13_cookie_len
= 0;
678 EXT_RETURN
tls_construct_ctos_early_data(SSL
*s
, WPACKET
*pkt
,
679 unsigned int context
, X509
*x
,
680 size_t chainidx
, int *al
)
682 const unsigned char *id
= NULL
;
684 SSL_SESSION
*psksess
= NULL
;
685 SSL_SESSION
*edsess
= NULL
;
686 const EVP_MD
*handmd
= NULL
;
688 if (s
->hello_retry_request
)
689 handmd
= ssl_handshake_md(s
);
691 if (s
->psk_use_session_cb
!= NULL
692 && (!s
->psk_use_session_cb(s
, handmd
, &id
, &idlen
, &psksess
)
694 && psksess
->ssl_version
!= TLS1_3_VERSION
))) {
695 SSL_SESSION_free(psksess
);
696 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, SSL_R_BAD_PSK
);
697 return EXT_RETURN_FAIL
;
700 SSL_SESSION_free(s
->psksession
);
701 s
->psksession
= psksess
;
702 if (psksess
!= NULL
) {
703 OPENSSL_free(s
->psksession_id
);
704 s
->psksession_id
= OPENSSL_memdup(id
, idlen
);
705 if (s
->psksession_id
== NULL
) {
706 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
707 return EXT_RETURN_FAIL
;
709 s
->psksession_id_len
= idlen
;
712 if (s
->early_data_state
!= SSL_EARLY_DATA_CONNECTING
713 || (s
->session
->ext
.max_early_data
== 0
714 && (psksess
== NULL
|| psksess
->ext
.max_early_data
== 0))) {
715 s
->max_early_data
= 0;
716 return EXT_RETURN_NOT_SENT
;
718 edsess
= s
->session
->ext
.max_early_data
!= 0 ? s
->session
: psksess
;
719 s
->max_early_data
= edsess
->ext
.max_early_data
;
721 if ((s
->ext
.hostname
== NULL
&& edsess
->ext
.hostname
!= NULL
)
722 || (s
->ext
.hostname
!= NULL
723 && (edsess
->ext
.hostname
== NULL
724 || strcmp(s
->ext
.hostname
, edsess
->ext
.hostname
) != 0))) {
725 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
726 SSL_R_INCONSISTENT_EARLY_DATA_SNI
);
727 return EXT_RETURN_FAIL
;
730 if ((s
->ext
.alpn
== NULL
&& edsess
->ext
.alpn_selected
!= NULL
)) {
731 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
732 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
733 return EXT_RETURN_FAIL
;
737 * Verify that we are offering an ALPN protocol consistent with the early
740 if (edsess
->ext
.alpn_selected
!= NULL
) {
741 PACKET prots
, alpnpkt
;
744 if (!PACKET_buf_init(&prots
, s
->ext
.alpn
, s
->ext
.alpn_len
)) {
745 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
746 return EXT_RETURN_FAIL
;
748 while (PACKET_get_length_prefixed_1(&prots
, &alpnpkt
)) {
749 if (PACKET_equal(&alpnpkt
, edsess
->ext
.alpn_selected
,
750 edsess
->ext
.alpn_selected_len
)) {
756 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
757 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
758 return EXT_RETURN_FAIL
;
762 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_early_data
)
763 || !WPACKET_start_sub_packet_u16(pkt
)
764 || !WPACKET_close(pkt
)) {
765 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
766 return EXT_RETURN_FAIL
;
770 * We set this to rejected here. Later, if the server acknowledges the
771 * extension, we set it to accepted.
773 s
->ext
.early_data
= SSL_EARLY_DATA_REJECTED
;
774 s
->ext
.early_data_ok
= 1;
776 return EXT_RETURN_SENT
;
779 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
780 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
783 * PSK pre binder overhead =
784 * 2 bytes for TLSEXT_TYPE_psk
785 * 2 bytes for extension length
786 * 2 bytes for identities list length
787 * 2 bytes for identity length
788 * 4 bytes for obfuscated_ticket_age
789 * 2 bytes for binder list length
790 * 1 byte for binder length
791 * The above excludes the number of bytes for the identity itself and the
792 * subsequent binder bytes
794 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
796 EXT_RETURN
tls_construct_ctos_padding(SSL
*s
, WPACKET
*pkt
,
797 unsigned int context
, X509
*x
,
798 size_t chainidx
, int *al
)
800 unsigned char *padbytes
;
803 if ((s
->options
& SSL_OP_TLSEXT_PADDING
) == 0)
804 return EXT_RETURN_NOT_SENT
;
807 * Add padding to workaround bugs in F5 terminators. See RFC7685.
808 * This code calculates the length of all extensions added so far but
809 * excludes the PSK extension (because that MUST be written last). Therefore
810 * this extension MUST always appear second to last.
812 if (!WPACKET_get_total_written(pkt
, &hlen
)) {
813 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING
, ERR_R_INTERNAL_ERROR
);
814 return EXT_RETURN_FAIL
;
818 * If we're going to send a PSK then that will be written out after this
819 * extension, so we need to calculate how long it is going to be.
821 if (s
->session
->ssl_version
== TLS1_3_VERSION
822 && s
->session
->ext
.ticklen
!= 0
823 && s
->session
->cipher
!= NULL
) {
824 const EVP_MD
*md
= ssl_md(s
->session
->cipher
->algorithm2
);
828 * Add the fixed PSK overhead, the identity length and the binder
831 hlen
+= PSK_PRE_BINDER_OVERHEAD
+ s
->session
->ext
.ticklen
836 if (hlen
> F5_WORKAROUND_MIN_MSG_LEN
&& hlen
< F5_WORKAROUND_MAX_MSG_LEN
) {
837 /* Calculate the amount of padding we need to add */
838 hlen
= F5_WORKAROUND_MAX_MSG_LEN
- hlen
;
841 * Take off the size of extension header itself (2 bytes for type and
842 * 2 bytes for length bytes), but ensure that the extension is at least
843 * 1 byte long so as not to have an empty extension last (WebSphere 7.x,
844 * 8.x are intolerant of that condition)
851 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_padding
)
852 || !WPACKET_sub_allocate_bytes_u16(pkt
, hlen
, &padbytes
)) {
853 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PADDING
, ERR_R_INTERNAL_ERROR
);
856 memset(padbytes
, 0, hlen
);
859 return EXT_RETURN_SENT
;
863 * Construct the pre_shared_key extension
865 EXT_RETURN
tls_construct_ctos_psk(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
866 X509
*x
, size_t chainidx
, int *al
)
868 #ifndef OPENSSL_NO_TLS1_3
869 uint32_t now
, agesec
, agems
= 0;
870 size_t reshashsize
= 0, pskhashsize
= 0, binderoffset
, msglen
;
871 unsigned char *resbinder
= NULL
, *pskbinder
= NULL
, *msgstart
= NULL
;
872 const EVP_MD
*handmd
= NULL
, *mdres
= NULL
, *mdpsk
= NULL
;
873 EXT_RETURN ret
= EXT_RETURN_FAIL
;
876 s
->session
->ext
.tick_identity
= TLSEXT_PSK_BAD_IDENTITY
;
879 * Note: At this stage of the code we only support adding a single
880 * resumption PSK. If we add support for multiple PSKs then the length
881 * calculations in the padding extension will need to be adjusted.
885 * If this is an incompatible or new session then we have nothing to resume
886 * so don't add this extension.
888 if (s
->session
->ssl_version
!= TLS1_3_VERSION
889 || (s
->session
->ext
.ticklen
== 0 && s
->psksession
== NULL
))
890 return EXT_RETURN_NOT_SENT
;
892 if (s
->hello_retry_request
)
893 handmd
= ssl_handshake_md(s
);
895 if (s
->session
->ext
.ticklen
!= 0) {
896 /* Get the digest associated with the ciphersuite in the session */
897 if (s
->session
->cipher
== NULL
) {
898 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
901 mdres
= ssl_md(s
->session
->cipher
->algorithm2
);
904 * Don't recognize this cipher so we can't use the session.
910 if (s
->hello_retry_request
&& mdres
!= handmd
) {
912 * Selected ciphersuite hash does not match the hash for the session
913 * so we can't use it.
919 * Technically the C standard just says time() returns a time_t and says
920 * nothing about the encoding of that type. In practice most
921 * implementations follow POSIX which holds it as an integral type in
922 * seconds since epoch. We've already made the assumption that we can do
923 * this in multiple places in the code, so portability shouldn't be an
926 now
= (uint32_t)time(NULL
);
927 agesec
= now
- (uint32_t)s
->session
->time
;
929 if (s
->session
->ext
.tick_lifetime_hint
< agesec
) {
930 /* Ticket is too old. Ignore it. */
935 * Calculate age in ms. We're just doing it to nearest second. Should be
938 agems
= agesec
* (uint32_t)1000;
940 if (agesec
!= 0 && agems
/ (uint32_t)1000 != agesec
) {
942 * Overflow. Shouldn't happen unless this is a *really* old session.
943 * If so we just ignore it.
949 * Obfuscate the age. Overflow here is fine, this addition is supposed
952 agems
+= s
->session
->ext
.tick_age_add
;
954 reshashsize
= EVP_MD_size(mdres
);
959 if (!dores
&& s
->psksession
== NULL
)
960 return EXT_RETURN_NOT_SENT
;
962 if (s
->psksession
!= NULL
) {
963 mdpsk
= ssl_md(s
->psksession
->cipher
->algorithm2
);
966 * Don't recognize this cipher so we can't use the session.
967 * If this happens it's an application bug.
969 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, SSL_R_BAD_PSK
);
973 if (s
->hello_retry_request
&& mdpsk
!= handmd
) {
975 * Selected ciphersuite hash does not match the hash for the PSK
976 * session. This is an application bug.
978 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, SSL_R_BAD_PSK
);
982 pskhashsize
= EVP_MD_size(mdpsk
);
985 /* Create the extension, but skip over the binder for now */
986 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk
)
987 || !WPACKET_start_sub_packet_u16(pkt
)
988 || !WPACKET_start_sub_packet_u16(pkt
)) {
989 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
994 if (!WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
,
995 s
->session
->ext
.ticklen
)
996 || !WPACKET_put_bytes_u32(pkt
, agems
)) {
997 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
1002 if (s
->psksession
!= NULL
) {
1003 if (!WPACKET_sub_memcpy_u16(pkt
, s
->psksession_id
,
1004 s
->psksession_id_len
)
1005 || !WPACKET_put_bytes_u32(pkt
, 0)) {
1006 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
1011 if (!WPACKET_close(pkt
)
1012 || !WPACKET_get_total_written(pkt
, &binderoffset
)
1013 || !WPACKET_start_sub_packet_u16(pkt
)
1015 && !WPACKET_sub_allocate_bytes_u8(pkt
, reshashsize
, &resbinder
))
1016 || (s
->psksession
!= NULL
1017 && !WPACKET_sub_allocate_bytes_u8(pkt
, pskhashsize
, &pskbinder
))
1018 || !WPACKET_close(pkt
)
1019 || !WPACKET_close(pkt
)
1020 || !WPACKET_get_total_written(pkt
, &msglen
)
1022 * We need to fill in all the sub-packet lengths now so we can
1023 * calculate the HMAC of the message up to the binders
1025 || !WPACKET_fill_lengths(pkt
)) {
1026 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
1030 msgstart
= WPACKET_get_curr(pkt
) - msglen
;
1033 && tls_psk_do_binder(s
, mdres
, msgstart
, binderoffset
, NULL
,
1034 resbinder
, s
->session
, 1, 0) != 1) {
1035 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
1039 if (s
->psksession
!= NULL
1040 && tls_psk_do_binder(s
, mdpsk
, msgstart
, binderoffset
, NULL
,
1041 pskbinder
, s
->psksession
, 1, 1) != 1) {
1042 SSLerr(SSL_F_TLS_CONSTRUCT_CTOS_PSK
, ERR_R_INTERNAL_ERROR
);
1047 s
->session
->ext
.tick_identity
= 0;
1048 if (s
->psksession
!= NULL
)
1049 s
->psksession
->ext
.tick_identity
= (dores
? 1 : 0);
1051 ret
= EXT_RETURN_SENT
;
1060 * Parse the server's renegotiation binding and abort if it's not right
1062 int tls_parse_stoc_renegotiate(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1063 X509
*x
, size_t chainidx
, int *al
)
1065 size_t expected_len
= s
->s3
->previous_client_finished_len
1066 + s
->s3
->previous_server_finished_len
;
1068 const unsigned char *data
;
1070 /* Check for logic errors */
1071 if (!ossl_assert(expected_len
== 0
1072 || s
->s3
->previous_client_finished_len
!= 0)
1073 || !ossl_assert(expected_len
== 0
1074 || s
->s3
->previous_server_finished_len
!= 0)) {
1075 *al
= SSL_AD_INTERNAL_ERROR
;
1079 /* Parse the length byte */
1080 if (!PACKET_get_1_len(pkt
, &ilen
)) {
1081 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1082 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1083 *al
= SSL_AD_DECODE_ERROR
;
1087 /* Consistency check */
1088 if (PACKET_remaining(pkt
) != ilen
) {
1089 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1090 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1091 *al
= SSL_AD_DECODE_ERROR
;
1095 /* Check that the extension matches */
1096 if (ilen
!= expected_len
) {
1097 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1098 SSL_R_RENEGOTIATION_MISMATCH
);
1099 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1103 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
->previous_client_finished_len
)
1104 || memcmp(data
, s
->s3
->previous_client_finished
,
1105 s
->s3
->previous_client_finished_len
) != 0) {
1106 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1107 SSL_R_RENEGOTIATION_MISMATCH
);
1108 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1112 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
->previous_server_finished_len
)
1113 || memcmp(data
, s
->s3
->previous_server_finished
,
1114 s
->s3
->previous_server_finished_len
) != 0) {
1115 SSLerr(SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1116 SSL_R_RENEGOTIATION_MISMATCH
);
1117 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1120 s
->s3
->send_connection_binding
= 1;
1125 int tls_parse_stoc_server_name(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1126 X509
*x
, size_t chainidx
, int *al
)
1128 if (s
->ext
.hostname
== NULL
) {
1129 *al
= SSL_AD_INTERNAL_ERROR
;
1133 if (PACKET_remaining(pkt
) > 0) {
1134 *al
= SSL_AD_DECODE_ERROR
;
1139 if (s
->session
->ext
.hostname
!= NULL
) {
1140 *al
= SSL_AD_INTERNAL_ERROR
;
1143 s
->session
->ext
.hostname
= OPENSSL_strdup(s
->ext
.hostname
);
1144 if (s
->session
->ext
.hostname
== NULL
) {
1145 *al
= SSL_AD_INTERNAL_ERROR
;
1153 #ifndef OPENSSL_NO_EC
1154 int tls_parse_stoc_ec_pt_formats(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1155 X509
*x
, size_t chainidx
, int *al
)
1157 unsigned int ecpointformats_len
;
1158 PACKET ecptformatlist
;
1160 if (!PACKET_as_length_prefixed_1(pkt
, &ecptformatlist
)) {
1161 *al
= SSL_AD_DECODE_ERROR
;
1165 ecpointformats_len
= PACKET_remaining(&ecptformatlist
);
1166 s
->session
->ext
.ecpointformats_len
= 0;
1168 OPENSSL_free(s
->session
->ext
.ecpointformats
);
1169 s
->session
->ext
.ecpointformats
= OPENSSL_malloc(ecpointformats_len
);
1170 if (s
->session
->ext
.ecpointformats
== NULL
) {
1171 *al
= SSL_AD_INTERNAL_ERROR
;
1175 s
->session
->ext
.ecpointformats_len
= ecpointformats_len
;
1177 if (!PACKET_copy_bytes(&ecptformatlist
,
1178 s
->session
->ext
.ecpointformats
,
1179 ecpointformats_len
)) {
1180 *al
= SSL_AD_INTERNAL_ERROR
;
1189 int tls_parse_stoc_session_ticket(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1190 X509
*x
, size_t chainidx
, int *al
)
1192 if (s
->ext
.session_ticket_cb
!= NULL
&&
1193 !s
->ext
.session_ticket_cb(s
, PACKET_data(pkt
),
1194 PACKET_remaining(pkt
),
1195 s
->ext
.session_ticket_cb_arg
)) {
1196 *al
= SSL_AD_INTERNAL_ERROR
;
1200 if (!tls_use_ticket(s
)) {
1201 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1204 if (PACKET_remaining(pkt
) > 0) {
1205 *al
= SSL_AD_DECODE_ERROR
;
1209 s
->ext
.ticket_expected
= 1;
1214 #ifndef OPENSSL_NO_OCSP
1215 int tls_parse_stoc_status_request(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1216 X509
*x
, size_t chainidx
, int *al
)
1219 * MUST only be sent if we've requested a status
1220 * request message. In TLS <= 1.2 it must also be empty.
1222 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
) {
1223 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1226 if (!SSL_IS_TLS13(s
) && PACKET_remaining(pkt
) > 0) {
1227 *al
= SSL_AD_DECODE_ERROR
;
1231 if (SSL_IS_TLS13(s
)) {
1232 /* We only know how to handle this if it's for the first Certificate in
1233 * the chain. We ignore any other responses.
1237 return tls_process_cert_status_body(s
, pkt
, al
);
1240 /* Set flag to expect CertificateStatus message */
1241 s
->ext
.status_expected
= 1;
1248 #ifndef OPENSSL_NO_CT
1249 int tls_parse_stoc_sct(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1250 size_t chainidx
, int *al
)
1253 * Only take it if we asked for it - i.e if there is no CT validation
1254 * callback set, then a custom extension MAY be processing it, so we
1255 * need to let control continue to flow to that.
1257 if (s
->ct_validation_callback
!= NULL
) {
1258 size_t size
= PACKET_remaining(pkt
);
1260 /* Simply copy it off for later processing */
1261 OPENSSL_free(s
->ext
.scts
);
1264 s
->ext
.scts_len
= size
;
1266 s
->ext
.scts
= OPENSSL_malloc(size
);
1267 if (s
->ext
.scts
== NULL
1268 || !PACKET_copy_bytes(pkt
, s
->ext
.scts
, size
)) {
1269 *al
= SSL_AD_INTERNAL_ERROR
;
1274 ENDPOINT role
= (context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0
1275 ? ENDPOINT_CLIENT
: ENDPOINT_BOTH
;
1278 * If we didn't ask for it then there must be a custom extension,
1279 * otherwise this is unsolicited.
1281 if (custom_ext_find(&s
->cert
->custext
, role
,
1282 TLSEXT_TYPE_signed_certificate_timestamp
,
1284 *al
= TLS1_AD_UNSUPPORTED_EXTENSION
;
1288 if (custom_ext_parse(s
, context
,
1289 TLSEXT_TYPE_signed_certificate_timestamp
,
1290 PACKET_data(pkt
), PACKET_remaining(pkt
),
1291 x
, chainidx
, al
) <= 0)
1300 #ifndef OPENSSL_NO_NEXTPROTONEG
1302 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1303 * elements of zero length are allowed and the set of elements must exactly
1304 * fill the length of the block. Returns 1 on success or 0 on failure.
1306 static int ssl_next_proto_validate(PACKET
*pkt
)
1308 PACKET tmp_protocol
;
1310 while (PACKET_remaining(pkt
)) {
1311 if (!PACKET_get_length_prefixed_1(pkt
, &tmp_protocol
)
1312 || PACKET_remaining(&tmp_protocol
) == 0)
1319 int tls_parse_stoc_npn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1320 size_t chainidx
, int *al
)
1322 unsigned char *selected
;
1323 unsigned char selected_len
;
1326 /* Check if we are in a renegotiation. If so ignore this extension */
1327 if (!SSL_IS_FIRST_HANDSHAKE(s
))
1330 /* We must have requested it. */
1331 if (s
->ctx
->ext
.npn_select_cb
== NULL
) {
1332 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1336 /* The data must be valid */
1338 if (!ssl_next_proto_validate(&tmppkt
)) {
1339 *al
= SSL_AD_DECODE_ERROR
;
1342 if (s
->ctx
->ext
.npn_select_cb(s
, &selected
, &selected_len
,
1344 PACKET_remaining(pkt
),
1345 s
->ctx
->ext
.npn_select_cb_arg
) !=
1346 SSL_TLSEXT_ERR_OK
) {
1347 *al
= SSL_AD_INTERNAL_ERROR
;
1352 * Could be non-NULL if server has sent multiple NPN extensions in
1353 * a single Serverhello
1355 OPENSSL_free(s
->ext
.npn
);
1356 s
->ext
.npn
= OPENSSL_malloc(selected_len
);
1357 if (s
->ext
.npn
== NULL
) {
1358 *al
= SSL_AD_INTERNAL_ERROR
;
1362 memcpy(s
->ext
.npn
, selected
, selected_len
);
1363 s
->ext
.npn_len
= selected_len
;
1364 s
->s3
->npn_seen
= 1;
1370 int tls_parse_stoc_alpn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1371 size_t chainidx
, int *al
)
1375 /* We must have requested it. */
1376 if (!s
->s3
->alpn_sent
) {
1377 *al
= SSL_AD_UNSUPPORTED_EXTENSION
;
1381 * The extension data consists of:
1382 * uint16 list_length
1383 * uint8 proto_length;
1384 * uint8 proto[proto_length];
1386 if (!PACKET_get_net_2_len(pkt
, &len
)
1387 || PACKET_remaining(pkt
) != len
|| !PACKET_get_1_len(pkt
, &len
)
1388 || PACKET_remaining(pkt
) != len
) {
1389 *al
= SSL_AD_DECODE_ERROR
;
1392 OPENSSL_free(s
->s3
->alpn_selected
);
1393 s
->s3
->alpn_selected
= OPENSSL_malloc(len
);
1394 if (s
->s3
->alpn_selected
== NULL
) {
1395 *al
= SSL_AD_INTERNAL_ERROR
;
1398 if (!PACKET_copy_bytes(pkt
, s
->s3
->alpn_selected
, len
)) {
1399 *al
= SSL_AD_DECODE_ERROR
;
1402 s
->s3
->alpn_selected_len
= len
;
1404 if (s
->session
->ext
.alpn_selected
== NULL
1405 || s
->session
->ext
.alpn_selected_len
!= len
1406 || memcmp(s
->session
->ext
.alpn_selected
, s
->s3
->alpn_selected
, len
)
1408 /* ALPN not consistent with the old session so cannot use early_data */
1409 s
->ext
.early_data_ok
= 0;
1412 /* If a new session then update it with the selected ALPN */
1413 s
->session
->ext
.alpn_selected
=
1414 OPENSSL_memdup(s
->s3
->alpn_selected
, s
->s3
->alpn_selected_len
);
1415 if (s
->session
->ext
.alpn_selected
== NULL
) {
1416 *al
= SSL_AD_INTERNAL_ERROR
;
1419 s
->session
->ext
.alpn_selected_len
= s
->s3
->alpn_selected_len
;
1425 #ifndef OPENSSL_NO_SRTP
1426 int tls_parse_stoc_use_srtp(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1427 size_t chainidx
, int *al
)
1429 unsigned int id
, ct
, mki
;
1431 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
;
1432 SRTP_PROTECTION_PROFILE
*prof
;
1434 if (!PACKET_get_net_2(pkt
, &ct
) || ct
!= 2
1435 || !PACKET_get_net_2(pkt
, &id
)
1436 || !PACKET_get_1(pkt
, &mki
)
1437 || PACKET_remaining(pkt
) != 0) {
1438 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1439 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1440 *al
= SSL_AD_DECODE_ERROR
;
1445 /* Must be no MKI, since we never offer one */
1446 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
, SSL_R_BAD_SRTP_MKI_VALUE
);
1447 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1451 /* Throw an error if the server gave us an unsolicited extension */
1452 clnt
= SSL_get_srtp_profiles(s
);
1454 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
, SSL_R_NO_SRTP_PROFILES
);
1455 *al
= SSL_AD_DECODE_ERROR
;
1460 * Check to see if the server gave us something we support (and
1461 * presumably offered)
1463 for (i
= 0; i
< sk_SRTP_PROTECTION_PROFILE_num(clnt
); i
++) {
1464 prof
= sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
1466 if (prof
->id
== id
) {
1467 s
->srtp_profile
= prof
;
1473 SSLerr(SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1474 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1475 *al
= SSL_AD_DECODE_ERROR
;
1480 int tls_parse_stoc_etm(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1481 size_t chainidx
, int *al
)
1483 /* Ignore if inappropriate ciphersuite */
1484 if (!(s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
1485 && s
->s3
->tmp
.new_cipher
->algorithm_mac
!= SSL_AEAD
1486 && s
->s3
->tmp
.new_cipher
->algorithm_enc
!= SSL_RC4
)
1492 int tls_parse_stoc_ems(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1493 size_t chainidx
, int *al
)
1495 s
->s3
->flags
|= TLS1_FLAGS_RECEIVED_EXTMS
;
1497 s
->session
->flags
|= SSL_SESS_FLAG_EXTMS
;
1502 int tls_parse_stoc_key_share(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1503 size_t chainidx
, int *al
)
1505 #ifndef OPENSSL_NO_TLS1_3
1506 unsigned int group_id
;
1508 EVP_PKEY
*ckey
= s
->s3
->tmp
.pkey
, *skey
= NULL
;
1511 if (ckey
== NULL
|| s
->s3
->peer_tmp
!= NULL
) {
1512 *al
= SSL_AD_INTERNAL_ERROR
;
1513 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1517 if (!PACKET_get_net_2(pkt
, &group_id
)) {
1518 *al
= SSL_AD_DECODE_ERROR
;
1519 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_LENGTH_MISMATCH
);
1523 if ((context
& SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
) != 0) {
1524 unsigned const char *pcurves
= NULL
;
1525 size_t i
, num_curves
;
1527 if (PACKET_remaining(pkt
) != 0) {
1528 *al
= SSL_AD_DECODE_ERROR
;
1529 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_LENGTH_MISMATCH
);
1534 * It is an error if the HelloRetryRequest wants a key_share that we
1535 * already sent in the first ClientHello
1537 if (group_id
== s
->s3
->group_id
) {
1538 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1539 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1543 /* Validate the selected group is one we support */
1544 if (!tls1_get_curvelist(s
, 0, &pcurves
, &num_curves
)) {
1545 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1548 for (i
= 0; i
< num_curves
; i
++, pcurves
+= 2) {
1549 if (group_id
== bytestogroup(pcurves
))
1553 || !tls_curve_allowed(s
, pcurves
, SSL_SECOP_CURVE_SUPPORTED
)) {
1554 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1555 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1559 s
->s3
->group_id
= group_id
;
1560 EVP_PKEY_free(s
->s3
->tmp
.pkey
);
1561 s
->s3
->tmp
.pkey
= NULL
;
1565 if (group_id
!= s
->s3
->group_id
) {
1567 * This isn't for the group that we sent in the original
1570 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1571 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1575 if (!PACKET_as_length_prefixed_2(pkt
, &encoded_pt
)
1576 || PACKET_remaining(&encoded_pt
) == 0) {
1577 *al
= SSL_AD_DECODE_ERROR
;
1578 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_LENGTH_MISMATCH
);
1582 skey
= ssl_generate_pkey(ckey
);
1584 *al
= SSL_AD_INTERNAL_ERROR
;
1585 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_MALLOC_FAILURE
);
1588 if (!EVP_PKEY_set1_tls_encodedpoint(skey
, PACKET_data(&encoded_pt
),
1589 PACKET_remaining(&encoded_pt
))) {
1590 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1591 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_ECPOINT
);
1592 EVP_PKEY_free(skey
);
1596 if (ssl_derive(s
, ckey
, skey
, 1) == 0) {
1597 *al
= SSL_AD_INTERNAL_ERROR
;
1598 SSLerr(SSL_F_TLS_PARSE_STOC_KEY_SHARE
, ERR_R_INTERNAL_ERROR
);
1599 EVP_PKEY_free(skey
);
1602 s
->s3
->peer_tmp
= skey
;
1608 int tls_parse_stoc_cookie(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1609 size_t chainidx
, int *al
)
1613 if (!PACKET_as_length_prefixed_2(pkt
, &cookie
)
1614 || !PACKET_memdup(&cookie
, &s
->ext
.tls13_cookie
,
1615 &s
->ext
.tls13_cookie_len
)) {
1616 *al
= SSL_AD_DECODE_ERROR
;
1617 SSLerr(SSL_F_TLS_PARSE_STOC_COOKIE
, SSL_R_LENGTH_MISMATCH
);
1624 int tls_parse_stoc_early_data(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1625 X509
*x
, size_t chainidx
, int *al
)
1627 if (context
== SSL_EXT_TLS1_3_NEW_SESSION_TICKET
) {
1628 unsigned long max_early_data
;
1630 if (!PACKET_get_net_4(pkt
, &max_early_data
)
1631 || PACKET_remaining(pkt
) != 0) {
1632 SSLerr(SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1633 SSL_R_INVALID_MAX_EARLY_DATA
);
1634 *al
= SSL_AD_DECODE_ERROR
;
1638 s
->session
->ext
.max_early_data
= max_early_data
;
1643 if (PACKET_remaining(pkt
) != 0) {
1644 *al
= SSL_AD_DECODE_ERROR
;
1648 if (!s
->ext
.early_data_ok
1650 || s
->session
->ext
.tick_identity
!= 0) {
1652 * If we get here then we didn't send early data, or we didn't resume
1653 * using the first identity, or the SNI/ALPN is not consistent so the
1654 * server should not be accepting it.
1656 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1660 s
->ext
.early_data
= SSL_EARLY_DATA_ACCEPTED
;
1665 int tls_parse_stoc_psk(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1666 size_t chainidx
, int *al
)
1668 #ifndef OPENSSL_NO_TLS1_3
1669 unsigned int identity
;
1671 if (!PACKET_get_net_2(pkt
, &identity
) || PACKET_remaining(pkt
) != 0) {
1672 *al
= SSL_AD_DECODE_ERROR
;
1673 SSLerr(SSL_F_TLS_PARSE_STOC_PSK
, SSL_R_LENGTH_MISMATCH
);
1677 if (s
->session
->ext
.tick_identity
== (int)identity
) {
1679 SSL_SESSION_free(s
->psksession
);
1680 s
->psksession
= NULL
;
1684 if (s
->psksession
== NULL
1685 || s
->psksession
->ext
.tick_identity
!= (int)identity
) {
1686 *al
= SSL_AD_ILLEGAL_PARAMETER
;
1687 SSLerr(SSL_F_TLS_PARSE_STOC_PSK
, SSL_R_BAD_PSK_IDENTITY
);
1692 * If we used the external PSK for sending early_data then s->early_secret
1693 * is already set up, so don't overwrite it. Otherwise we copy the
1694 * early_secret across that we generated earlier.
1696 if ((s
->early_data_state
!= SSL_EARLY_DATA_WRITE_RETRY
1697 && s
->early_data_state
!= SSL_EARLY_DATA_FINISHED_WRITING
)
1698 || s
->session
->ext
.max_early_data
> 0
1699 || s
->psksession
->ext
.max_early_data
== 0)
1700 memcpy(s
->early_secret
, s
->psksession
->early_secret
, EVP_MAX_MD_SIZE
);
1702 SSL_SESSION_free(s
->session
);
1703 s
->session
= s
->psksession
;
1704 s
->psksession
= NULL
;