2 * Copyright 2016-2018 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
,
19 /* Add RI if renegotiating */
21 return EXT_RETURN_NOT_SENT
;
23 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_renegotiate
)
24 || !WPACKET_start_sub_packet_u16(pkt
)
25 || !WPACKET_sub_memcpy_u8(pkt
, s
->s3
->previous_client_finished
,
26 s
->s3
->previous_client_finished_len
)
27 || !WPACKET_close(pkt
)) {
28 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_RENEGOTIATE
,
29 ERR_R_INTERNAL_ERROR
);
30 return EXT_RETURN_FAIL
;
33 return EXT_RETURN_SENT
;
36 EXT_RETURN
tls_construct_ctos_server_name(SSL
*s
, WPACKET
*pkt
,
37 unsigned int context
, X509
*x
,
40 if (s
->ext
.hostname
== NULL
)
41 return EXT_RETURN_NOT_SENT
;
43 /* Add TLS extension servername to the Client Hello message */
44 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_server_name
)
45 /* Sub-packet for server_name extension */
46 || !WPACKET_start_sub_packet_u16(pkt
)
47 /* Sub-packet for servername list (always 1 hostname)*/
48 || !WPACKET_start_sub_packet_u16(pkt
)
49 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_NAMETYPE_host_name
)
50 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.hostname
,
51 strlen(s
->ext
.hostname
))
52 || !WPACKET_close(pkt
)
53 || !WPACKET_close(pkt
)) {
54 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SERVER_NAME
,
55 ERR_R_INTERNAL_ERROR
);
56 return EXT_RETURN_FAIL
;
59 return EXT_RETURN_SENT
;
62 /* Push a Max Fragment Len extension into ClientHello */
63 EXT_RETURN
tls_construct_ctos_maxfragmentlen(SSL
*s
, WPACKET
*pkt
,
64 unsigned int context
, X509
*x
,
67 if (s
->ext
.max_fragment_len_mode
== TLSEXT_max_fragment_length_DISABLED
)
68 return EXT_RETURN_NOT_SENT
;
70 /* Add Max Fragment Length extension if client enabled it. */
72 * 4 bytes for this extension type and extension length
73 * 1 byte for the Max Fragment Length code value.
75 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_max_fragment_length
)
76 /* Sub-packet for Max Fragment Length extension (1 byte) */
77 || !WPACKET_start_sub_packet_u16(pkt
)
78 || !WPACKET_put_bytes_u8(pkt
, s
->ext
.max_fragment_len_mode
)
79 || !WPACKET_close(pkt
)) {
80 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
81 SSL_F_TLS_CONSTRUCT_CTOS_MAXFRAGMENTLEN
, ERR_R_INTERNAL_ERROR
);
82 return EXT_RETURN_FAIL
;
85 return EXT_RETURN_SENT
;
88 #ifndef OPENSSL_NO_SRP
89 EXT_RETURN
tls_construct_ctos_srp(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
90 X509
*x
, size_t chainidx
)
92 /* Add SRP username if there is one */
93 if (s
->srp_ctx
.login
== NULL
)
94 return EXT_RETURN_NOT_SENT
;
96 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_srp
)
97 /* Sub-packet for SRP extension */
98 || !WPACKET_start_sub_packet_u16(pkt
)
99 || !WPACKET_start_sub_packet_u8(pkt
)
100 /* login must not be zero...internal error if so */
101 || !WPACKET_set_flags(pkt
, WPACKET_FLAGS_NON_ZERO_LENGTH
)
102 || !WPACKET_memcpy(pkt
, s
->srp_ctx
.login
,
103 strlen(s
->srp_ctx
.login
))
104 || !WPACKET_close(pkt
)
105 || !WPACKET_close(pkt
)) {
106 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SRP
,
107 ERR_R_INTERNAL_ERROR
);
108 return EXT_RETURN_FAIL
;
111 return EXT_RETURN_SENT
;
115 #ifndef OPENSSL_NO_EC
116 static int use_ecc(SSL
*s
)
119 unsigned long alg_k
, alg_a
;
120 STACK_OF(SSL_CIPHER
) *cipher_stack
= NULL
;
122 /* See if we support any ECC ciphersuites */
123 if (s
->version
== SSL3_VERSION
)
126 cipher_stack
= SSL_get_ciphers(s
);
127 end
= sk_SSL_CIPHER_num(cipher_stack
);
128 for (i
= 0; i
< end
; i
++) {
129 const SSL_CIPHER
*c
= sk_SSL_CIPHER_value(cipher_stack
, i
);
131 alg_k
= c
->algorithm_mkey
;
132 alg_a
= c
->algorithm_auth
;
133 if ((alg_k
& (SSL_kECDHE
| SSL_kECDHEPSK
))
134 || (alg_a
& SSL_aECDSA
)
135 || c
->min_tls
>= TLS1_3_VERSION
)
142 EXT_RETURN
tls_construct_ctos_ec_pt_formats(SSL
*s
, WPACKET
*pkt
,
143 unsigned int context
, X509
*x
,
146 const unsigned char *pformats
;
150 return EXT_RETURN_NOT_SENT
;
152 /* Add TLS extension ECPointFormats to the ClientHello message */
153 tls1_get_formatlist(s
, &pformats
, &num_formats
);
155 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_ec_point_formats
)
156 /* Sub-packet for formats extension */
157 || !WPACKET_start_sub_packet_u16(pkt
)
158 || !WPACKET_sub_memcpy_u8(pkt
, pformats
, num_formats
)
159 || !WPACKET_close(pkt
)) {
160 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
161 SSL_F_TLS_CONSTRUCT_CTOS_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
162 return EXT_RETURN_FAIL
;
165 return EXT_RETURN_SENT
;
168 EXT_RETURN
tls_construct_ctos_supported_groups(SSL
*s
, WPACKET
*pkt
,
169 unsigned int context
, X509
*x
,
172 const uint16_t *pgroups
= NULL
;
173 size_t num_groups
= 0, i
;
176 return EXT_RETURN_NOT_SENT
;
179 * Add TLS extension supported_groups to the ClientHello message
181 /* TODO(TLS1.3): Add support for DHE groups */
182 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
184 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_groups
)
185 /* Sub-packet for supported_groups extension */
186 || !WPACKET_start_sub_packet_u16(pkt
)
187 || !WPACKET_start_sub_packet_u16(pkt
)) {
188 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
189 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
190 ERR_R_INTERNAL_ERROR
);
191 return EXT_RETURN_FAIL
;
193 /* Copy curve ID if supported */
194 for (i
= 0; i
< num_groups
; i
++) {
195 uint16_t ctmp
= pgroups
[i
];
197 if (tls_curve_allowed(s
, ctmp
, SSL_SECOP_CURVE_SUPPORTED
)) {
198 if (!WPACKET_put_bytes_u16(pkt
, ctmp
)) {
199 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
200 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
201 ERR_R_INTERNAL_ERROR
);
202 return EXT_RETURN_FAIL
;
206 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
207 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
208 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_GROUPS
,
209 ERR_R_INTERNAL_ERROR
);
210 return EXT_RETURN_FAIL
;
213 return EXT_RETURN_SENT
;
217 EXT_RETURN
tls_construct_ctos_session_ticket(SSL
*s
, WPACKET
*pkt
,
218 unsigned int context
, X509
*x
,
223 if (!tls_use_ticket(s
))
224 return EXT_RETURN_NOT_SENT
;
226 if (!s
->new_session
&& s
->session
!= NULL
227 && s
->session
->ext
.tick
!= NULL
228 && s
->session
->ssl_version
!= TLS1_3_VERSION
) {
229 ticklen
= s
->session
->ext
.ticklen
;
230 } else if (s
->session
&& s
->ext
.session_ticket
!= NULL
231 && s
->ext
.session_ticket
->data
!= NULL
) {
232 ticklen
= s
->ext
.session_ticket
->length
;
233 s
->session
->ext
.tick
= OPENSSL_malloc(ticklen
);
234 if (s
->session
->ext
.tick
== NULL
) {
235 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
236 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
,
237 ERR_R_INTERNAL_ERROR
);
238 return EXT_RETURN_FAIL
;
240 memcpy(s
->session
->ext
.tick
,
241 s
->ext
.session_ticket
->data
, ticklen
);
242 s
->session
->ext
.ticklen
= ticklen
;
247 if (ticklen
== 0 && s
->ext
.session_ticket
!= NULL
&&
248 s
->ext
.session_ticket
->data
== NULL
)
249 return EXT_RETURN_NOT_SENT
;
251 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_session_ticket
)
252 || !WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
, ticklen
)) {
253 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
254 SSL_F_TLS_CONSTRUCT_CTOS_SESSION_TICKET
, ERR_R_INTERNAL_ERROR
);
255 return EXT_RETURN_FAIL
;
258 return EXT_RETURN_SENT
;
261 EXT_RETURN
tls_construct_ctos_sig_algs(SSL
*s
, WPACKET
*pkt
,
262 unsigned int context
, X509
*x
,
266 const uint16_t *salg
;
268 if (!SSL_CLIENT_USE_SIGALGS(s
))
269 return EXT_RETURN_NOT_SENT
;
271 salglen
= tls12_get_psigalgs(s
, 1, &salg
);
272 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signature_algorithms
)
273 /* Sub-packet for sig-algs extension */
274 || !WPACKET_start_sub_packet_u16(pkt
)
275 /* Sub-packet for the actual list */
276 || !WPACKET_start_sub_packet_u16(pkt
)
277 || !tls12_copy_sigalgs(s
, pkt
, salg
, salglen
)
278 || !WPACKET_close(pkt
)
279 || !WPACKET_close(pkt
)) {
280 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SIG_ALGS
,
281 ERR_R_INTERNAL_ERROR
);
282 return EXT_RETURN_FAIL
;
285 return EXT_RETURN_SENT
;
288 #ifndef OPENSSL_NO_OCSP
289 EXT_RETURN
tls_construct_ctos_status_request(SSL
*s
, WPACKET
*pkt
,
290 unsigned int context
, X509
*x
,
295 /* This extension isn't defined for client Certificates */
297 return EXT_RETURN_NOT_SENT
;
299 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
)
300 return EXT_RETURN_NOT_SENT
;
302 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_status_request
)
303 /* Sub-packet for status request extension */
304 || !WPACKET_start_sub_packet_u16(pkt
)
305 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_STATUSTYPE_ocsp
)
306 /* Sub-packet for the ids */
307 || !WPACKET_start_sub_packet_u16(pkt
)) {
308 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
309 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
310 return EXT_RETURN_FAIL
;
312 for (i
= 0; i
< sk_OCSP_RESPID_num(s
->ext
.ocsp
.ids
); i
++) {
313 unsigned char *idbytes
;
314 OCSP_RESPID
*id
= sk_OCSP_RESPID_value(s
->ext
.ocsp
.ids
, i
);
315 int idlen
= i2d_OCSP_RESPID(id
, NULL
);
318 /* Sub-packet for an individual id */
319 || !WPACKET_sub_allocate_bytes_u16(pkt
, idlen
, &idbytes
)
320 || i2d_OCSP_RESPID(id
, &idbytes
) != idlen
) {
321 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
322 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
323 ERR_R_INTERNAL_ERROR
);
324 return EXT_RETURN_FAIL
;
327 if (!WPACKET_close(pkt
)
328 || !WPACKET_start_sub_packet_u16(pkt
)) {
329 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
330 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
331 return EXT_RETURN_FAIL
;
333 if (s
->ext
.ocsp
.exts
) {
334 unsigned char *extbytes
;
335 int extlen
= i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, NULL
);
338 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
339 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
340 ERR_R_INTERNAL_ERROR
);
341 return EXT_RETURN_FAIL
;
343 if (!WPACKET_allocate_bytes(pkt
, extlen
, &extbytes
)
344 || i2d_X509_EXTENSIONS(s
->ext
.ocsp
.exts
, &extbytes
)
346 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
347 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
,
348 ERR_R_INTERNAL_ERROR
);
349 return EXT_RETURN_FAIL
;
352 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
353 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
354 SSL_F_TLS_CONSTRUCT_CTOS_STATUS_REQUEST
, ERR_R_INTERNAL_ERROR
);
355 return EXT_RETURN_FAIL
;
358 return EXT_RETURN_SENT
;
362 #ifndef OPENSSL_NO_NEXTPROTONEG
363 EXT_RETURN
tls_construct_ctos_npn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
364 X509
*x
, size_t chainidx
)
366 if (s
->ctx
->ext
.npn_select_cb
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
367 return EXT_RETURN_NOT_SENT
;
370 * The client advertises an empty extension to indicate its support
371 * for Next Protocol Negotiation
373 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_next_proto_neg
)
374 || !WPACKET_put_bytes_u16(pkt
, 0)) {
375 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_NPN
,
376 ERR_R_INTERNAL_ERROR
);
377 return EXT_RETURN_FAIL
;
380 return EXT_RETURN_SENT
;
384 EXT_RETURN
tls_construct_ctos_alpn(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
385 X509
*x
, size_t chainidx
)
387 s
->s3
->alpn_sent
= 0;
389 if (s
->ext
.alpn
== NULL
|| !SSL_IS_FIRST_HANDSHAKE(s
))
390 return EXT_RETURN_NOT_SENT
;
392 if (!WPACKET_put_bytes_u16(pkt
,
393 TLSEXT_TYPE_application_layer_protocol_negotiation
)
394 /* Sub-packet ALPN extension */
395 || !WPACKET_start_sub_packet_u16(pkt
)
396 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.alpn
, s
->ext
.alpn_len
)
397 || !WPACKET_close(pkt
)) {
398 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_ALPN
,
399 ERR_R_INTERNAL_ERROR
);
400 return EXT_RETURN_FAIL
;
402 s
->s3
->alpn_sent
= 1;
404 return EXT_RETURN_SENT
;
408 #ifndef OPENSSL_NO_SRTP
409 EXT_RETURN
tls_construct_ctos_use_srtp(SSL
*s
, WPACKET
*pkt
,
410 unsigned int context
, X509
*x
,
413 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
= SSL_get_srtp_profiles(s
);
417 return EXT_RETURN_NOT_SENT
;
419 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_use_srtp
)
420 /* Sub-packet for SRTP extension */
421 || !WPACKET_start_sub_packet_u16(pkt
)
422 /* Sub-packet for the protection profile list */
423 || !WPACKET_start_sub_packet_u16(pkt
)) {
424 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
,
425 ERR_R_INTERNAL_ERROR
);
426 return EXT_RETURN_FAIL
;
429 end
= sk_SRTP_PROTECTION_PROFILE_num(clnt
);
430 for (i
= 0; i
< end
; i
++) {
431 const SRTP_PROTECTION_PROFILE
*prof
=
432 sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
434 if (prof
== NULL
|| !WPACKET_put_bytes_u16(pkt
, prof
->id
)) {
435 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
436 SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
, ERR_R_INTERNAL_ERROR
);
437 return EXT_RETURN_FAIL
;
440 if (!WPACKET_close(pkt
)
441 /* Add an empty use_mki value */
442 || !WPACKET_put_bytes_u8(pkt
, 0)
443 || !WPACKET_close(pkt
)) {
444 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_USE_SRTP
,
445 ERR_R_INTERNAL_ERROR
);
446 return EXT_RETURN_FAIL
;
449 return EXT_RETURN_SENT
;
453 EXT_RETURN
tls_construct_ctos_etm(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
454 X509
*x
, size_t chainidx
)
456 if (s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
457 return EXT_RETURN_NOT_SENT
;
459 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_encrypt_then_mac
)
460 || !WPACKET_put_bytes_u16(pkt
, 0)) {
461 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_ETM
,
462 ERR_R_INTERNAL_ERROR
);
463 return EXT_RETURN_FAIL
;
466 return EXT_RETURN_SENT
;
469 #ifndef OPENSSL_NO_CT
470 EXT_RETURN
tls_construct_ctos_sct(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
471 X509
*x
, size_t chainidx
)
473 if (s
->ct_validation_callback
== NULL
)
474 return EXT_RETURN_NOT_SENT
;
476 /* Not defined for client Certificates */
478 return EXT_RETURN_NOT_SENT
;
480 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_signed_certificate_timestamp
)
481 || !WPACKET_put_bytes_u16(pkt
, 0)) {
482 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_SCT
,
483 ERR_R_INTERNAL_ERROR
);
484 return EXT_RETURN_FAIL
;
487 return EXT_RETURN_SENT
;
491 EXT_RETURN
tls_construct_ctos_ems(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
492 X509
*x
, size_t chainidx
)
494 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_extended_master_secret
)
495 || !WPACKET_put_bytes_u16(pkt
, 0)) {
496 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EMS
,
497 ERR_R_INTERNAL_ERROR
);
498 return EXT_RETURN_FAIL
;
501 return EXT_RETURN_SENT
;
504 EXT_RETURN
tls_construct_ctos_supported_versions(SSL
*s
, WPACKET
*pkt
,
505 unsigned int context
, X509
*x
,
508 int currv
, min_version
, max_version
, reason
;
510 reason
= ssl_get_min_max_version(s
, &min_version
, &max_version
, NULL
);
512 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
513 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
, reason
);
514 return EXT_RETURN_FAIL
;
518 * Don't include this if we can't negotiate TLSv1.3. We can do a straight
519 * comparison here because we will never be called in DTLS.
521 if (max_version
< TLS1_3_VERSION
)
522 return EXT_RETURN_NOT_SENT
;
524 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_supported_versions
)
525 || !WPACKET_start_sub_packet_u16(pkt
)
526 || !WPACKET_start_sub_packet_u8(pkt
)) {
527 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
528 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
529 ERR_R_INTERNAL_ERROR
);
530 return EXT_RETURN_FAIL
;
533 for (currv
= max_version
; currv
>= min_version
; currv
--) {
534 if (!WPACKET_put_bytes_u16(pkt
, currv
)) {
535 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
536 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
537 ERR_R_INTERNAL_ERROR
);
538 return EXT_RETURN_FAIL
;
541 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
542 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
543 SSL_F_TLS_CONSTRUCT_CTOS_SUPPORTED_VERSIONS
,
544 ERR_R_INTERNAL_ERROR
);
545 return EXT_RETURN_FAIL
;
548 return EXT_RETURN_SENT
;
552 * Construct a psk_kex_modes extension.
554 EXT_RETURN
tls_construct_ctos_psk_kex_modes(SSL
*s
, WPACKET
*pkt
,
555 unsigned int context
, X509
*x
,
558 #ifndef OPENSSL_NO_TLS1_3
559 int nodhe
= s
->options
& SSL_OP_ALLOW_NO_DHE_KEX
;
561 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk_kex_modes
)
562 || !WPACKET_start_sub_packet_u16(pkt
)
563 || !WPACKET_start_sub_packet_u8(pkt
)
564 || !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE_DHE
)
565 || (nodhe
&& !WPACKET_put_bytes_u8(pkt
, TLSEXT_KEX_MODE_KE
))
566 || !WPACKET_close(pkt
)
567 || !WPACKET_close(pkt
)) {
568 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
569 SSL_F_TLS_CONSTRUCT_CTOS_PSK_KEX_MODES
, ERR_R_INTERNAL_ERROR
);
570 return EXT_RETURN_FAIL
;
573 s
->ext
.psk_kex_mode
= TLSEXT_KEX_MODE_FLAG_KE_DHE
;
575 s
->ext
.psk_kex_mode
|= TLSEXT_KEX_MODE_FLAG_KE
;
578 return EXT_RETURN_SENT
;
581 #ifndef OPENSSL_NO_TLS1_3
582 static int add_key_share(SSL
*s
, WPACKET
*pkt
, unsigned int curve_id
)
584 unsigned char *encoded_point
= NULL
;
585 EVP_PKEY
*key_share_key
= NULL
;
588 if (s
->s3
->tmp
.pkey
!= NULL
) {
589 if (!ossl_assert(s
->hello_retry_request
== SSL_HRR_PENDING
)) {
590 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
,
591 ERR_R_INTERNAL_ERROR
);
595 * Could happen if we got an HRR that wasn't requesting a new key_share
597 key_share_key
= s
->s3
->tmp
.pkey
;
599 key_share_key
= ssl_generate_pkey_group(s
, curve_id
);
600 if (key_share_key
== NULL
) {
601 /* SSLfatal() already called */
606 /* Encode the public key. */
607 encodedlen
= EVP_PKEY_get1_tls_encodedpoint(key_share_key
,
609 if (encodedlen
== 0) {
610 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
, ERR_R_EC_LIB
);
614 /* Create KeyShareEntry */
615 if (!WPACKET_put_bytes_u16(pkt
, curve_id
)
616 || !WPACKET_sub_memcpy_u16(pkt
, encoded_point
, encodedlen
)) {
617 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_ADD_KEY_SHARE
,
618 ERR_R_INTERNAL_ERROR
);
623 * TODO(TLS1.3): When changing to send more than one key_share we're
624 * going to need to be able to save more than one EVP_PKEY. For now
625 * we reuse the existing tmp.pkey
627 s
->s3
->tmp
.pkey
= key_share_key
;
628 s
->s3
->group_id
= curve_id
;
629 OPENSSL_free(encoded_point
);
633 if (s
->s3
->tmp
.pkey
== NULL
)
634 EVP_PKEY_free(key_share_key
);
635 OPENSSL_free(encoded_point
);
640 EXT_RETURN
tls_construct_ctos_key_share(SSL
*s
, WPACKET
*pkt
,
641 unsigned int context
, X509
*x
,
644 #ifndef OPENSSL_NO_TLS1_3
645 size_t i
, num_groups
= 0;
646 const uint16_t *pgroups
= NULL
;
647 uint16_t curve_id
= 0;
649 /* key_share extension */
650 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_key_share
)
651 /* Extension data sub-packet */
652 || !WPACKET_start_sub_packet_u16(pkt
)
653 /* KeyShare list sub-packet */
654 || !WPACKET_start_sub_packet_u16(pkt
)) {
655 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
656 ERR_R_INTERNAL_ERROR
);
657 return EXT_RETURN_FAIL
;
660 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
663 * TODO(TLS1.3): Make the number of key_shares sent configurable. For
666 if (s
->s3
->group_id
!= 0) {
667 curve_id
= s
->s3
->group_id
;
669 for (i
= 0; i
< num_groups
; i
++) {
671 if (!tls_curve_allowed(s
, pgroups
[i
], SSL_SECOP_CURVE_SUPPORTED
))
674 curve_id
= pgroups
[i
];
680 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
681 SSL_R_NO_SUITABLE_KEY_SHARE
);
682 return EXT_RETURN_FAIL
;
685 if (!add_key_share(s
, pkt
, curve_id
)) {
686 /* SSLfatal() already called */
687 return EXT_RETURN_FAIL
;
690 if (!WPACKET_close(pkt
) || !WPACKET_close(pkt
)) {
691 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_KEY_SHARE
,
692 ERR_R_INTERNAL_ERROR
);
693 return EXT_RETURN_FAIL
;
695 return EXT_RETURN_SENT
;
697 return EXT_RETURN_NOT_SENT
;
701 EXT_RETURN
tls_construct_ctos_cookie(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
702 X509
*x
, size_t chainidx
)
704 EXT_RETURN ret
= EXT_RETURN_FAIL
;
706 /* Should only be set if we've had an HRR */
707 if (s
->ext
.tls13_cookie_len
== 0)
708 return EXT_RETURN_NOT_SENT
;
710 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_cookie
)
711 /* Extension data sub-packet */
712 || !WPACKET_start_sub_packet_u16(pkt
)
713 || !WPACKET_sub_memcpy_u16(pkt
, s
->ext
.tls13_cookie
,
714 s
->ext
.tls13_cookie_len
)
715 || !WPACKET_close(pkt
)) {
716 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_COOKIE
,
717 ERR_R_INTERNAL_ERROR
);
721 ret
= EXT_RETURN_SENT
;
723 OPENSSL_free(s
->ext
.tls13_cookie
);
724 s
->ext
.tls13_cookie
= NULL
;
725 s
->ext
.tls13_cookie_len
= 0;
730 EXT_RETURN
tls_construct_ctos_early_data(SSL
*s
, WPACKET
*pkt
,
731 unsigned int context
, X509
*x
,
734 #ifndef OPENSSL_NO_PSK
735 char identity
[PSK_MAX_IDENTITY_LEN
+ 1];
736 #endif /* OPENSSL_NO_PSK */
737 const unsigned char *id
= NULL
;
739 SSL_SESSION
*psksess
= NULL
;
740 SSL_SESSION
*edsess
= NULL
;
741 const EVP_MD
*handmd
= NULL
;
743 if (s
->hello_retry_request
== SSL_HRR_PENDING
)
744 handmd
= ssl_handshake_md(s
);
746 if (s
->psk_use_session_cb
!= NULL
747 && (!s
->psk_use_session_cb(s
, handmd
, &id
, &idlen
, &psksess
)
749 && psksess
->ssl_version
!= TLS1_3_VERSION
))) {
750 SSL_SESSION_free(psksess
);
751 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
753 return EXT_RETURN_FAIL
;
756 #ifndef OPENSSL_NO_PSK
757 if (psksess
== NULL
&& s
->psk_client_callback
!= NULL
) {
758 unsigned char psk
[PSK_MAX_PSK_LEN
];
761 memset(identity
, 0, sizeof(identity
));
762 psklen
= s
->psk_client_callback(s
, NULL
, identity
, sizeof(identity
) - 1,
765 if (psklen
> PSK_MAX_PSK_LEN
) {
766 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
,
767 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
768 return EXT_RETURN_FAIL
;
769 } else if (psklen
> 0) {
770 const unsigned char tls13_aes128gcmsha256_id
[] = { 0x13, 0x01 };
771 const SSL_CIPHER
*cipher
;
773 idlen
= strlen(identity
);
774 if (idlen
> PSK_MAX_IDENTITY_LEN
) {
775 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
776 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
777 ERR_R_INTERNAL_ERROR
);
778 return EXT_RETURN_FAIL
;
780 id
= (unsigned char *)identity
;
783 * We found a PSK using an old style callback. We don't know
784 * the digest so we default to SHA256 as per the TLSv1.3 spec
786 cipher
= SSL_CIPHER_find(s
, tls13_aes128gcmsha256_id
);
787 if (cipher
== NULL
) {
788 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
789 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
790 ERR_R_INTERNAL_ERROR
);
791 return EXT_RETURN_FAIL
;
794 psksess
= SSL_SESSION_new();
796 || !SSL_SESSION_set1_master_key(psksess
, psk
, psklen
)
797 || !SSL_SESSION_set_cipher(psksess
, cipher
)
798 || !SSL_SESSION_set_protocol_version(psksess
, TLS1_3_VERSION
)) {
799 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
800 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
801 ERR_R_INTERNAL_ERROR
);
802 OPENSSL_cleanse(psk
, psklen
);
803 return EXT_RETURN_FAIL
;
805 OPENSSL_cleanse(psk
, psklen
);
808 #endif /* OPENSSL_NO_PSK */
810 SSL_SESSION_free(s
->psksession
);
811 s
->psksession
= psksess
;
812 if (psksess
!= NULL
) {
813 OPENSSL_free(s
->psksession_id
);
814 s
->psksession_id
= OPENSSL_memdup(id
, idlen
);
815 if (s
->psksession_id
== NULL
) {
816 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
817 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
818 return EXT_RETURN_FAIL
;
820 s
->psksession_id_len
= idlen
;
823 if (s
->early_data_state
!= SSL_EARLY_DATA_CONNECTING
824 || (s
->session
->ext
.max_early_data
== 0
825 && (psksess
== NULL
|| psksess
->ext
.max_early_data
== 0))) {
826 s
->max_early_data
= 0;
827 return EXT_RETURN_NOT_SENT
;
829 edsess
= s
->session
->ext
.max_early_data
!= 0 ? s
->session
: psksess
;
830 s
->max_early_data
= edsess
->ext
.max_early_data
;
832 if (edsess
->ext
.hostname
!= NULL
) {
833 if (s
->ext
.hostname
== NULL
834 || (s
->ext
.hostname
!= NULL
835 && strcmp(s
->ext
.hostname
, edsess
->ext
.hostname
) != 0)) {
836 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
837 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
838 SSL_R_INCONSISTENT_EARLY_DATA_SNI
);
839 return EXT_RETURN_FAIL
;
843 if ((s
->ext
.alpn
== NULL
&& edsess
->ext
.alpn_selected
!= NULL
)) {
844 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
845 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
846 return EXT_RETURN_FAIL
;
850 * Verify that we are offering an ALPN protocol consistent with the early
853 if (edsess
->ext
.alpn_selected
!= NULL
) {
854 PACKET prots
, alpnpkt
;
857 if (!PACKET_buf_init(&prots
, s
->ext
.alpn
, s
->ext
.alpn_len
)) {
858 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
859 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
, ERR_R_INTERNAL_ERROR
);
860 return EXT_RETURN_FAIL
;
862 while (PACKET_get_length_prefixed_1(&prots
, &alpnpkt
)) {
863 if (PACKET_equal(&alpnpkt
, edsess
->ext
.alpn_selected
,
864 edsess
->ext
.alpn_selected_len
)) {
870 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
871 SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
872 SSL_R_INCONSISTENT_EARLY_DATA_ALPN
);
873 return EXT_RETURN_FAIL
;
877 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_early_data
)
878 || !WPACKET_start_sub_packet_u16(pkt
)
879 || !WPACKET_close(pkt
)) {
880 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_EARLY_DATA
,
881 ERR_R_INTERNAL_ERROR
);
882 return EXT_RETURN_FAIL
;
886 * We set this to rejected here. Later, if the server acknowledges the
887 * extension, we set it to accepted.
889 s
->ext
.early_data
= SSL_EARLY_DATA_REJECTED
;
890 s
->ext
.early_data_ok
= 1;
892 return EXT_RETURN_SENT
;
895 #define F5_WORKAROUND_MIN_MSG_LEN 0xff
896 #define F5_WORKAROUND_MAX_MSG_LEN 0x200
899 * PSK pre binder overhead =
900 * 2 bytes for TLSEXT_TYPE_psk
901 * 2 bytes for extension length
902 * 2 bytes for identities list length
903 * 2 bytes for identity length
904 * 4 bytes for obfuscated_ticket_age
905 * 2 bytes for binder list length
906 * 1 byte for binder length
907 * The above excludes the number of bytes for the identity itself and the
908 * subsequent binder bytes
910 #define PSK_PRE_BINDER_OVERHEAD (2 + 2 + 2 + 2 + 4 + 2 + 1)
912 EXT_RETURN
tls_construct_ctos_padding(SSL
*s
, WPACKET
*pkt
,
913 unsigned int context
, X509
*x
,
916 unsigned char *padbytes
;
919 if ((s
->options
& SSL_OP_TLSEXT_PADDING
) == 0)
920 return EXT_RETURN_NOT_SENT
;
923 * Add padding to workaround bugs in F5 terminators. See RFC7685.
924 * This code calculates the length of all extensions added so far but
925 * excludes the PSK extension (because that MUST be written last). Therefore
926 * this extension MUST always appear second to last.
928 if (!WPACKET_get_total_written(pkt
, &hlen
)) {
929 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PADDING
,
930 ERR_R_INTERNAL_ERROR
);
931 return EXT_RETURN_FAIL
;
935 * If we're going to send a PSK then that will be written out after this
936 * extension, so we need to calculate how long it is going to be.
938 if (s
->session
->ssl_version
== TLS1_3_VERSION
939 && s
->session
->ext
.ticklen
!= 0
940 && s
->session
->cipher
!= NULL
) {
941 const EVP_MD
*md
= ssl_md(s
->session
->cipher
->algorithm2
);
945 * Add the fixed PSK overhead, the identity length and the binder
948 hlen
+= PSK_PRE_BINDER_OVERHEAD
+ s
->session
->ext
.ticklen
953 if (hlen
> F5_WORKAROUND_MIN_MSG_LEN
&& hlen
< F5_WORKAROUND_MAX_MSG_LEN
) {
954 /* Calculate the amount of padding we need to add */
955 hlen
= F5_WORKAROUND_MAX_MSG_LEN
- hlen
;
958 * Take off the size of extension header itself (2 bytes for type and
959 * 2 bytes for length bytes), but ensure that the extension is at least
960 * 1 byte long so as not to have an empty extension last (WebSphere 7.x,
961 * 8.x are intolerant of that condition)
968 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_padding
)
969 || !WPACKET_sub_allocate_bytes_u16(pkt
, hlen
, &padbytes
)) {
970 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PADDING
,
971 ERR_R_INTERNAL_ERROR
);
972 return EXT_RETURN_FAIL
;
974 memset(padbytes
, 0, hlen
);
977 return EXT_RETURN_SENT
;
981 * Construct the pre_shared_key extension
983 EXT_RETURN
tls_construct_ctos_psk(SSL
*s
, WPACKET
*pkt
, unsigned int context
,
984 X509
*x
, size_t chainidx
)
986 #ifndef OPENSSL_NO_TLS1_3
987 uint32_t now
, agesec
, agems
= 0;
988 size_t reshashsize
= 0, pskhashsize
= 0, binderoffset
, msglen
;
989 unsigned char *resbinder
= NULL
, *pskbinder
= NULL
, *msgstart
= NULL
;
990 const EVP_MD
*handmd
= NULL
, *mdres
= NULL
, *mdpsk
= NULL
;
993 s
->session
->ext
.tick_identity
= TLSEXT_PSK_BAD_IDENTITY
;
996 * Note: At this stage of the code we only support adding a single
997 * resumption PSK. If we add support for multiple PSKs then the length
998 * calculations in the padding extension will need to be adjusted.
1002 * If this is an incompatible or new session then we have nothing to resume
1003 * so don't add this extension.
1005 if (s
->session
->ssl_version
!= TLS1_3_VERSION
1006 || (s
->session
->ext
.ticklen
== 0 && s
->psksession
== NULL
))
1007 return EXT_RETURN_NOT_SENT
;
1009 if (s
->hello_retry_request
== SSL_HRR_PENDING
)
1010 handmd
= ssl_handshake_md(s
);
1012 if (s
->session
->ext
.ticklen
!= 0) {
1013 /* Get the digest associated with the ciphersuite in the session */
1014 if (s
->session
->cipher
== NULL
) {
1015 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1016 ERR_R_INTERNAL_ERROR
);
1017 return EXT_RETURN_FAIL
;
1019 mdres
= ssl_md(s
->session
->cipher
->algorithm2
);
1020 if (mdres
== NULL
) {
1022 * Don't recognize this cipher so we can't use the session.
1028 if (s
->hello_retry_request
== SSL_HRR_PENDING
&& mdres
!= handmd
) {
1030 * Selected ciphersuite hash does not match the hash for the session
1031 * so we can't use it.
1037 * Technically the C standard just says time() returns a time_t and says
1038 * nothing about the encoding of that type. In practice most
1039 * implementations follow POSIX which holds it as an integral type in
1040 * seconds since epoch. We've already made the assumption that we can do
1041 * this in multiple places in the code, so portability shouldn't be an
1044 now
= (uint32_t)time(NULL
);
1045 agesec
= now
- (uint32_t)s
->session
->time
;
1047 * We calculate the age in seconds but the server may work in ms. Due to
1048 * rounding errors we could overestimate the age by up to 1s. It is
1049 * better to underestimate it. Otherwise, if the RTT is very short, when
1050 * the server calculates the age reported by the client it could be
1051 * bigger than the age calculated on the server - which should never
1057 if (s
->session
->ext
.tick_lifetime_hint
< agesec
) {
1058 /* Ticket is too old. Ignore it. */
1063 * Calculate age in ms. We're just doing it to nearest second. Should be
1066 agems
= agesec
* (uint32_t)1000;
1068 if (agesec
!= 0 && agems
/ (uint32_t)1000 != agesec
) {
1070 * Overflow. Shouldn't happen unless this is a *really* old session.
1071 * If so we just ignore it.
1077 * Obfuscate the age. Overflow here is fine, this addition is supposed
1080 agems
+= s
->session
->ext
.tick_age_add
;
1082 reshashsize
= EVP_MD_size(mdres
);
1087 if (!dores
&& s
->psksession
== NULL
)
1088 return EXT_RETURN_NOT_SENT
;
1090 if (s
->psksession
!= NULL
) {
1091 mdpsk
= ssl_md(s
->psksession
->cipher
->algorithm2
);
1092 if (mdpsk
== NULL
) {
1094 * Don't recognize this cipher so we can't use the session.
1095 * If this happens it's an application bug.
1097 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1099 return EXT_RETURN_FAIL
;
1102 if (s
->hello_retry_request
== SSL_HRR_PENDING
&& mdpsk
!= handmd
) {
1104 * Selected ciphersuite hash does not match the hash for the PSK
1105 * session. This is an application bug.
1107 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1109 return EXT_RETURN_FAIL
;
1112 pskhashsize
= EVP_MD_size(mdpsk
);
1115 /* Create the extension, but skip over the binder for now */
1116 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_psk
)
1117 || !WPACKET_start_sub_packet_u16(pkt
)
1118 || !WPACKET_start_sub_packet_u16(pkt
)) {
1119 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1120 ERR_R_INTERNAL_ERROR
);
1121 return EXT_RETURN_FAIL
;
1125 if (!WPACKET_sub_memcpy_u16(pkt
, s
->session
->ext
.tick
,
1126 s
->session
->ext
.ticklen
)
1127 || !WPACKET_put_bytes_u32(pkt
, agems
)) {
1128 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1129 ERR_R_INTERNAL_ERROR
);
1130 return EXT_RETURN_FAIL
;
1134 if (s
->psksession
!= NULL
) {
1135 if (!WPACKET_sub_memcpy_u16(pkt
, s
->psksession_id
,
1136 s
->psksession_id_len
)
1137 || !WPACKET_put_bytes_u32(pkt
, 0)) {
1138 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1139 ERR_R_INTERNAL_ERROR
);
1140 return EXT_RETURN_FAIL
;
1144 if (!WPACKET_close(pkt
)
1145 || !WPACKET_get_total_written(pkt
, &binderoffset
)
1146 || !WPACKET_start_sub_packet_u16(pkt
)
1148 && !WPACKET_sub_allocate_bytes_u8(pkt
, reshashsize
, &resbinder
))
1149 || (s
->psksession
!= NULL
1150 && !WPACKET_sub_allocate_bytes_u8(pkt
, pskhashsize
, &pskbinder
))
1151 || !WPACKET_close(pkt
)
1152 || !WPACKET_close(pkt
)
1153 || !WPACKET_get_total_written(pkt
, &msglen
)
1155 * We need to fill in all the sub-packet lengths now so we can
1156 * calculate the HMAC of the message up to the binders
1158 || !WPACKET_fill_lengths(pkt
)) {
1159 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_CONSTRUCT_CTOS_PSK
,
1160 ERR_R_INTERNAL_ERROR
);
1161 return EXT_RETURN_FAIL
;
1164 msgstart
= WPACKET_get_curr(pkt
) - msglen
;
1167 && tls_psk_do_binder(s
, mdres
, msgstart
, binderoffset
, NULL
,
1168 resbinder
, s
->session
, 1, 0) != 1) {
1169 /* SSLfatal() already called */
1170 return EXT_RETURN_FAIL
;
1173 if (s
->psksession
!= NULL
1174 && tls_psk_do_binder(s
, mdpsk
, msgstart
, binderoffset
, NULL
,
1175 pskbinder
, s
->psksession
, 1, 1) != 1) {
1176 /* SSLfatal() already called */
1177 return EXT_RETURN_FAIL
;
1181 s
->session
->ext
.tick_identity
= 0;
1182 if (s
->psksession
!= NULL
)
1183 s
->psksession
->ext
.tick_identity
= (dores
? 1 : 0);
1185 return EXT_RETURN_SENT
;
1187 return EXT_RETURN_NOT_SENT
;
1191 EXT_RETURN
tls_construct_ctos_post_handshake_auth(SSL
*s
, WPACKET
*pkt
,
1192 unsigned int context
,
1193 X509
*x
, size_t chainidx
)
1195 #ifndef OPENSSL_NO_TLS1_3
1196 if (!s
->pha_enabled
)
1197 return EXT_RETURN_NOT_SENT
;
1199 /* construct extension - 0 length, no contents */
1200 if (!WPACKET_put_bytes_u16(pkt
, TLSEXT_TYPE_post_handshake_auth
)
1201 || !WPACKET_start_sub_packet_u16(pkt
)
1202 || !WPACKET_close(pkt
)) {
1203 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1204 SSL_F_TLS_CONSTRUCT_CTOS_POST_HANDSHAKE_AUTH
,
1205 ERR_R_INTERNAL_ERROR
);
1206 return EXT_RETURN_FAIL
;
1209 s
->post_handshake_auth
= SSL_PHA_EXT_SENT
;
1211 return EXT_RETURN_SENT
;
1213 return EXT_RETURN_NOT_SENT
;
1219 * Parse the server's renegotiation binding and abort if it's not right
1221 int tls_parse_stoc_renegotiate(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1222 X509
*x
, size_t chainidx
)
1224 size_t expected_len
= s
->s3
->previous_client_finished_len
1225 + s
->s3
->previous_server_finished_len
;
1227 const unsigned char *data
;
1229 /* Check for logic errors */
1230 if (!ossl_assert(expected_len
== 0
1231 || s
->s3
->previous_client_finished_len
!= 0)
1232 || !ossl_assert(expected_len
== 0
1233 || s
->s3
->previous_server_finished_len
!= 0)) {
1234 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1235 ERR_R_INTERNAL_ERROR
);
1239 /* Parse the length byte */
1240 if (!PACKET_get_1_len(pkt
, &ilen
)) {
1241 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1242 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1246 /* Consistency check */
1247 if (PACKET_remaining(pkt
) != ilen
) {
1248 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1249 SSL_R_RENEGOTIATION_ENCODING_ERR
);
1253 /* Check that the extension matches */
1254 if (ilen
!= expected_len
) {
1255 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1256 SSL_R_RENEGOTIATION_MISMATCH
);
1260 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
->previous_client_finished_len
)
1261 || memcmp(data
, s
->s3
->previous_client_finished
,
1262 s
->s3
->previous_client_finished_len
) != 0) {
1263 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1264 SSL_R_RENEGOTIATION_MISMATCH
);
1268 if (!PACKET_get_bytes(pkt
, &data
, s
->s3
->previous_server_finished_len
)
1269 || memcmp(data
, s
->s3
->previous_server_finished
,
1270 s
->s3
->previous_server_finished_len
) != 0) {
1271 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_RENEGOTIATE
,
1272 SSL_R_RENEGOTIATION_MISMATCH
);
1275 s
->s3
->send_connection_binding
= 1;
1280 /* Parse the server's max fragment len extension packet */
1281 int tls_parse_stoc_maxfragmentlen(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1282 X509
*x
, size_t chainidx
)
1286 if (PACKET_remaining(pkt
) != 1 || !PACKET_get_1(pkt
, &value
)) {
1287 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1288 SSL_R_BAD_EXTENSION
);
1292 /* |value| should contains a valid max-fragment-length code. */
1293 if (!IS_MAX_FRAGMENT_LENGTH_EXT_VALID(value
)) {
1294 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1295 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1296 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH
);
1300 /* Must be the same value as client-configured one who was sent to server */
1302 * RFC 6066: if a client receives a maximum fragment length negotiation
1303 * response that differs from the length it requested, ...
1304 * It must abort with SSL_AD_ILLEGAL_PARAMETER alert
1306 if (value
!= s
->ext
.max_fragment_len_mode
) {
1307 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1308 SSL_F_TLS_PARSE_STOC_MAXFRAGMENTLEN
,
1309 SSL_R_SSL3_EXT_INVALID_MAX_FRAGMENT_LENGTH
);
1314 * Maximum Fragment Length Negotiation succeeded.
1315 * The negotiated Maximum Fragment Length is binding now.
1317 s
->session
->ext
.max_fragment_len_mode
= value
;
1322 int tls_parse_stoc_server_name(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1323 X509
*x
, size_t chainidx
)
1325 if (s
->ext
.hostname
== NULL
) {
1326 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1327 ERR_R_INTERNAL_ERROR
);
1331 if (PACKET_remaining(pkt
) > 0) {
1332 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1333 SSL_R_BAD_EXTENSION
);
1338 if (s
->session
->ext
.hostname
!= NULL
) {
1339 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1340 ERR_R_INTERNAL_ERROR
);
1343 s
->session
->ext
.hostname
= OPENSSL_strdup(s
->ext
.hostname
);
1344 if (s
->session
->ext
.hostname
== NULL
) {
1345 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SERVER_NAME
,
1346 ERR_R_INTERNAL_ERROR
);
1354 #ifndef OPENSSL_NO_EC
1355 int tls_parse_stoc_ec_pt_formats(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1356 X509
*x
, size_t chainidx
)
1358 size_t ecpointformats_len
;
1359 PACKET ecptformatlist
;
1361 if (!PACKET_as_length_prefixed_1(pkt
, &ecptformatlist
)) {
1362 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
,
1363 SSL_R_BAD_EXTENSION
);
1367 ecpointformats_len
= PACKET_remaining(&ecptformatlist
);
1368 if (ecpointformats_len
== 0) {
1369 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1370 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, SSL_R_BAD_LENGTH
);
1374 s
->session
->ext
.ecpointformats_len
= 0;
1375 OPENSSL_free(s
->session
->ext
.ecpointformats
);
1376 s
->session
->ext
.ecpointformats
= OPENSSL_malloc(ecpointformats_len
);
1377 if (s
->session
->ext
.ecpointformats
== NULL
) {
1378 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1379 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
1383 s
->session
->ext
.ecpointformats_len
= ecpointformats_len
;
1385 if (!PACKET_copy_bytes(&ecptformatlist
,
1386 s
->session
->ext
.ecpointformats
,
1387 ecpointformats_len
)) {
1388 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
,
1389 SSL_F_TLS_PARSE_STOC_EC_PT_FORMATS
, ERR_R_INTERNAL_ERROR
);
1398 int tls_parse_stoc_session_ticket(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1399 X509
*x
, size_t chainidx
)
1401 if (s
->ext
.session_ticket_cb
!= NULL
&&
1402 !s
->ext
.session_ticket_cb(s
, PACKET_data(pkt
),
1403 PACKET_remaining(pkt
),
1404 s
->ext
.session_ticket_cb_arg
)) {
1405 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
,
1406 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1410 if (!tls_use_ticket(s
)) {
1411 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
,
1412 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1415 if (PACKET_remaining(pkt
) > 0) {
1416 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1417 SSL_F_TLS_PARSE_STOC_SESSION_TICKET
, SSL_R_BAD_EXTENSION
);
1421 s
->ext
.ticket_expected
= 1;
1426 #ifndef OPENSSL_NO_OCSP
1427 int tls_parse_stoc_status_request(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1428 X509
*x
, size_t chainidx
)
1430 if (context
== SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
) {
1431 /* We ignore this if the server sends a CertificateRequest */
1432 /* TODO(TLS1.3): Add support for this */
1437 * MUST only be sent if we've requested a status
1438 * request message. In TLS <= 1.2 it must also be empty.
1440 if (s
->ext
.status_type
!= TLSEXT_STATUSTYPE_ocsp
) {
1441 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
,
1442 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST
, SSL_R_BAD_EXTENSION
);
1445 if (!SSL_IS_TLS13(s
) && PACKET_remaining(pkt
) > 0) {
1446 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1447 SSL_F_TLS_PARSE_STOC_STATUS_REQUEST
, SSL_R_BAD_EXTENSION
);
1451 if (SSL_IS_TLS13(s
)) {
1452 /* We only know how to handle this if it's for the first Certificate in
1453 * the chain. We ignore any other responses.
1458 /* SSLfatal() already called */
1459 return tls_process_cert_status_body(s
, pkt
);
1462 /* Set flag to expect CertificateStatus message */
1463 s
->ext
.status_expected
= 1;
1470 #ifndef OPENSSL_NO_CT
1471 int tls_parse_stoc_sct(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1474 if (context
== SSL_EXT_TLS1_3_CERTIFICATE_REQUEST
) {
1475 /* We ignore this if the server sends it in a CertificateRequest */
1476 /* TODO(TLS1.3): Add support for this */
1481 * Only take it if we asked for it - i.e if there is no CT validation
1482 * callback set, then a custom extension MAY be processing it, so we
1483 * need to let control continue to flow to that.
1485 if (s
->ct_validation_callback
!= NULL
) {
1486 size_t size
= PACKET_remaining(pkt
);
1488 /* Simply copy it off for later processing */
1489 OPENSSL_free(s
->ext
.scts
);
1492 s
->ext
.scts_len
= (uint16_t)size
;
1494 s
->ext
.scts
= OPENSSL_malloc(size
);
1495 if (s
->ext
.scts
== NULL
1496 || !PACKET_copy_bytes(pkt
, s
->ext
.scts
, size
)) {
1497 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_SCT
,
1498 ERR_R_INTERNAL_ERROR
);
1503 ENDPOINT role
= (context
& SSL_EXT_TLS1_2_SERVER_HELLO
) != 0
1504 ? ENDPOINT_CLIENT
: ENDPOINT_BOTH
;
1507 * If we didn't ask for it then there must be a custom extension,
1508 * otherwise this is unsolicited.
1510 if (custom_ext_find(&s
->cert
->custext
, role
,
1511 TLSEXT_TYPE_signed_certificate_timestamp
,
1513 SSLfatal(s
, TLS1_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_SCT
,
1514 SSL_R_BAD_EXTENSION
);
1518 if (!custom_ext_parse(s
, context
,
1519 TLSEXT_TYPE_signed_certificate_timestamp
,
1520 PACKET_data(pkt
), PACKET_remaining(pkt
),
1522 /* SSLfatal already called */
1532 #ifndef OPENSSL_NO_NEXTPROTONEG
1534 * ssl_next_proto_validate validates a Next Protocol Negotiation block. No
1535 * elements of zero length are allowed and the set of elements must exactly
1536 * fill the length of the block. Returns 1 on success or 0 on failure.
1538 static int ssl_next_proto_validate(SSL
*s
, PACKET
*pkt
)
1540 PACKET tmp_protocol
;
1542 while (PACKET_remaining(pkt
)) {
1543 if (!PACKET_get_length_prefixed_1(pkt
, &tmp_protocol
)
1544 || PACKET_remaining(&tmp_protocol
) == 0) {
1545 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_SSL_NEXT_PROTO_VALIDATE
,
1546 SSL_R_BAD_EXTENSION
);
1554 int tls_parse_stoc_npn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1557 unsigned char *selected
;
1558 unsigned char selected_len
;
1561 /* Check if we are in a renegotiation. If so ignore this extension */
1562 if (!SSL_IS_FIRST_HANDSHAKE(s
))
1565 /* We must have requested it. */
1566 if (s
->ctx
->ext
.npn_select_cb
== NULL
) {
1567 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_NPN
,
1568 SSL_R_BAD_EXTENSION
);
1572 /* The data must be valid */
1574 if (!ssl_next_proto_validate(s
, &tmppkt
)) {
1575 /* SSLfatal() already called */
1578 if (s
->ctx
->ext
.npn_select_cb(s
, &selected
, &selected_len
,
1580 PACKET_remaining(pkt
),
1581 s
->ctx
->ext
.npn_select_cb_arg
) !=
1582 SSL_TLSEXT_ERR_OK
) {
1583 SSLfatal(s
, SSL_AD_HANDSHAKE_FAILURE
, SSL_F_TLS_PARSE_STOC_NPN
,
1584 SSL_R_BAD_EXTENSION
);
1589 * Could be non-NULL if server has sent multiple NPN extensions in
1590 * a single Serverhello
1592 OPENSSL_free(s
->ext
.npn
);
1593 s
->ext
.npn
= OPENSSL_malloc(selected_len
);
1594 if (s
->ext
.npn
== NULL
) {
1595 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_NPN
,
1596 ERR_R_INTERNAL_ERROR
);
1600 memcpy(s
->ext
.npn
, selected
, selected_len
);
1601 s
->ext
.npn_len
= selected_len
;
1602 s
->s3
->npn_seen
= 1;
1608 int tls_parse_stoc_alpn(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1613 /* We must have requested it. */
1614 if (!s
->s3
->alpn_sent
) {
1615 SSLfatal(s
, SSL_AD_UNSUPPORTED_EXTENSION
, SSL_F_TLS_PARSE_STOC_ALPN
,
1616 SSL_R_BAD_EXTENSION
);
1620 * The extension data consists of:
1621 * uint16 list_length
1622 * uint8 proto_length;
1623 * uint8 proto[proto_length];
1625 if (!PACKET_get_net_2_len(pkt
, &len
)
1626 || PACKET_remaining(pkt
) != len
|| !PACKET_get_1_len(pkt
, &len
)
1627 || PACKET_remaining(pkt
) != len
) {
1628 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1629 SSL_R_BAD_EXTENSION
);
1632 OPENSSL_free(s
->s3
->alpn_selected
);
1633 s
->s3
->alpn_selected
= OPENSSL_malloc(len
);
1634 if (s
->s3
->alpn_selected
== NULL
) {
1635 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1636 ERR_R_INTERNAL_ERROR
);
1639 if (!PACKET_copy_bytes(pkt
, s
->s3
->alpn_selected
, len
)) {
1640 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1641 SSL_R_BAD_EXTENSION
);
1644 s
->s3
->alpn_selected_len
= len
;
1646 if (s
->session
->ext
.alpn_selected
== NULL
1647 || s
->session
->ext
.alpn_selected_len
!= len
1648 || memcmp(s
->session
->ext
.alpn_selected
, s
->s3
->alpn_selected
, len
)
1650 /* ALPN not consistent with the old session so cannot use early_data */
1651 s
->ext
.early_data_ok
= 0;
1655 * This is a new session and so alpn_selected should have been
1656 * initialised to NULL. We should update it with the selected ALPN.
1658 if (!ossl_assert(s
->session
->ext
.alpn_selected
== NULL
)) {
1659 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1660 ERR_R_INTERNAL_ERROR
);
1663 s
->session
->ext
.alpn_selected
=
1664 OPENSSL_memdup(s
->s3
->alpn_selected
, s
->s3
->alpn_selected_len
);
1665 if (s
->session
->ext
.alpn_selected
== NULL
) {
1666 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_ALPN
,
1667 ERR_R_INTERNAL_ERROR
);
1670 s
->session
->ext
.alpn_selected_len
= s
->s3
->alpn_selected_len
;
1676 #ifndef OPENSSL_NO_SRTP
1677 int tls_parse_stoc_use_srtp(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1680 unsigned int id
, ct
, mki
;
1682 STACK_OF(SRTP_PROTECTION_PROFILE
) *clnt
;
1683 SRTP_PROTECTION_PROFILE
*prof
;
1685 if (!PACKET_get_net_2(pkt
, &ct
) || ct
!= 2
1686 || !PACKET_get_net_2(pkt
, &id
)
1687 || !PACKET_get_1(pkt
, &mki
)
1688 || PACKET_remaining(pkt
) != 0) {
1689 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1690 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1695 /* Must be no MKI, since we never offer one */
1696 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1697 SSL_R_BAD_SRTP_MKI_VALUE
);
1701 /* Throw an error if the server gave us an unsolicited extension */
1702 clnt
= SSL_get_srtp_profiles(s
);
1704 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1705 SSL_R_NO_SRTP_PROFILES
);
1710 * Check to see if the server gave us something we support (and
1711 * presumably offered)
1713 for (i
= 0; i
< sk_SRTP_PROTECTION_PROFILE_num(clnt
); i
++) {
1714 prof
= sk_SRTP_PROTECTION_PROFILE_value(clnt
, i
);
1716 if (prof
->id
== id
) {
1717 s
->srtp_profile
= prof
;
1722 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_USE_SRTP
,
1723 SSL_R_BAD_SRTP_PROTECTION_PROFILE_LIST
);
1728 int tls_parse_stoc_etm(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1731 /* Ignore if inappropriate ciphersuite */
1732 if (!(s
->options
& SSL_OP_NO_ENCRYPT_THEN_MAC
)
1733 && s
->s3
->tmp
.new_cipher
->algorithm_mac
!= SSL_AEAD
1734 && s
->s3
->tmp
.new_cipher
->algorithm_enc
!= SSL_RC4
)
1740 int tls_parse_stoc_ems(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1743 s
->s3
->flags
|= TLS1_FLAGS_RECEIVED_EXTMS
;
1745 s
->session
->flags
|= SSL_SESS_FLAG_EXTMS
;
1750 int tls_parse_stoc_supported_versions(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1751 X509
*x
, size_t chainidx
)
1753 unsigned int version
;
1755 if (!PACKET_get_net_2(pkt
, &version
)
1756 || PACKET_remaining(pkt
) != 0) {
1757 SSLfatal(s
, SSL_AD_DECODE_ERROR
,
1758 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS
,
1759 SSL_R_LENGTH_MISMATCH
);
1764 * The only protocol version we support which is valid in this extension in
1765 * a ServerHello is TLSv1.3 therefore we shouldn't be getting anything else.
1767 if (version
!= TLS1_3_VERSION
) {
1768 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1769 SSL_F_TLS_PARSE_STOC_SUPPORTED_VERSIONS
,
1770 SSL_R_BAD_PROTOCOL_VERSION_NUMBER
);
1774 /* We ignore this extension for HRRs except to sanity check it */
1775 if (context
== SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
)
1778 /* We just set it here. We validate it in ssl_choose_client_version */
1779 s
->version
= version
;
1784 int tls_parse_stoc_key_share(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1787 #ifndef OPENSSL_NO_TLS1_3
1788 unsigned int group_id
;
1790 EVP_PKEY
*ckey
= s
->s3
->tmp
.pkey
, *skey
= NULL
;
1793 if (ckey
== NULL
|| s
->s3
->peer_tmp
!= NULL
) {
1794 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1795 ERR_R_INTERNAL_ERROR
);
1799 if (!PACKET_get_net_2(pkt
, &group_id
)) {
1800 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1801 SSL_R_LENGTH_MISMATCH
);
1805 if ((context
& SSL_EXT_TLS1_3_HELLO_RETRY_REQUEST
) != 0) {
1806 const uint16_t *pgroups
= NULL
;
1807 size_t i
, num_groups
;
1809 if (PACKET_remaining(pkt
) != 0) {
1810 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1811 SSL_R_LENGTH_MISMATCH
);
1816 * It is an error if the HelloRetryRequest wants a key_share that we
1817 * already sent in the first ClientHello
1819 if (group_id
== s
->s3
->group_id
) {
1820 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1821 SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1825 /* Validate the selected group is one we support */
1826 tls1_get_supported_groups(s
, &pgroups
, &num_groups
);
1827 for (i
= 0; i
< num_groups
; i
++) {
1828 if (group_id
== pgroups
[i
])
1832 || !tls_curve_allowed(s
, group_id
, SSL_SECOP_CURVE_SUPPORTED
)) {
1833 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
,
1834 SSL_F_TLS_PARSE_STOC_KEY_SHARE
, SSL_R_BAD_KEY_SHARE
);
1838 s
->s3
->group_id
= group_id
;
1839 EVP_PKEY_free(s
->s3
->tmp
.pkey
);
1840 s
->s3
->tmp
.pkey
= NULL
;
1844 if (group_id
!= s
->s3
->group_id
) {
1846 * This isn't for the group that we sent in the original
1849 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1850 SSL_R_BAD_KEY_SHARE
);
1854 if (!PACKET_as_length_prefixed_2(pkt
, &encoded_pt
)
1855 || PACKET_remaining(&encoded_pt
) == 0) {
1856 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1857 SSL_R_LENGTH_MISMATCH
);
1861 skey
= ssl_generate_pkey(ckey
);
1863 SSLfatal(s
, SSL_AD_INTERNAL_ERROR
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1864 ERR_R_MALLOC_FAILURE
);
1867 if (!EVP_PKEY_set1_tls_encodedpoint(skey
, PACKET_data(&encoded_pt
),
1868 PACKET_remaining(&encoded_pt
))) {
1869 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_KEY_SHARE
,
1871 EVP_PKEY_free(skey
);
1875 if (ssl_derive(s
, ckey
, skey
, 1) == 0) {
1876 /* SSLfatal() already called */
1877 EVP_PKEY_free(skey
);
1880 s
->s3
->peer_tmp
= skey
;
1886 int tls_parse_stoc_cookie(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1891 if (!PACKET_as_length_prefixed_2(pkt
, &cookie
)
1892 || !PACKET_memdup(&cookie
, &s
->ext
.tls13_cookie
,
1893 &s
->ext
.tls13_cookie_len
)) {
1894 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_COOKIE
,
1895 SSL_R_LENGTH_MISMATCH
);
1902 int tls_parse_stoc_early_data(SSL
*s
, PACKET
*pkt
, unsigned int context
,
1903 X509
*x
, size_t chainidx
)
1905 if (context
== SSL_EXT_TLS1_3_NEW_SESSION_TICKET
) {
1906 unsigned long max_early_data
;
1908 if (!PACKET_get_net_4(pkt
, &max_early_data
)
1909 || PACKET_remaining(pkt
) != 0) {
1910 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1911 SSL_R_INVALID_MAX_EARLY_DATA
);
1915 s
->session
->ext
.max_early_data
= max_early_data
;
1920 if (PACKET_remaining(pkt
) != 0) {
1921 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1922 SSL_R_BAD_EXTENSION
);
1926 if (!s
->ext
.early_data_ok
1928 || s
->session
->ext
.tick_identity
!= 0) {
1930 * If we get here then we didn't send early data, or we didn't resume
1931 * using the first identity, or the SNI/ALPN is not consistent so the
1932 * server should not be accepting it.
1934 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_EARLY_DATA
,
1935 SSL_R_BAD_EXTENSION
);
1939 s
->ext
.early_data
= SSL_EARLY_DATA_ACCEPTED
;
1944 int tls_parse_stoc_psk(SSL
*s
, PACKET
*pkt
, unsigned int context
, X509
*x
,
1947 #ifndef OPENSSL_NO_TLS1_3
1948 unsigned int identity
;
1950 if (!PACKET_get_net_2(pkt
, &identity
) || PACKET_remaining(pkt
) != 0) {
1951 SSLfatal(s
, SSL_AD_DECODE_ERROR
, SSL_F_TLS_PARSE_STOC_PSK
,
1952 SSL_R_LENGTH_MISMATCH
);
1956 if (s
->session
->ext
.tick_identity
== (int)identity
) {
1958 SSL_SESSION_free(s
->psksession
);
1959 s
->psksession
= NULL
;
1963 if (s
->psksession
== NULL
1964 || s
->psksession
->ext
.tick_identity
!= (int)identity
) {
1965 SSLfatal(s
, SSL_AD_ILLEGAL_PARAMETER
, SSL_F_TLS_PARSE_STOC_PSK
,
1966 SSL_R_BAD_PSK_IDENTITY
);
1971 * If we used the external PSK for sending early_data then s->early_secret
1972 * is already set up, so don't overwrite it. Otherwise we copy the
1973 * early_secret across that we generated earlier.
1975 if ((s
->early_data_state
!= SSL_EARLY_DATA_WRITE_RETRY
1976 && s
->early_data_state
!= SSL_EARLY_DATA_FINISHED_WRITING
)
1977 || s
->session
->ext
.max_early_data
> 0
1978 || s
->psksession
->ext
.max_early_data
== 0)
1979 memcpy(s
->early_secret
, s
->psksession
->early_secret
, EVP_MAX_MD_SIZE
);
1981 SSL_SESSION_free(s
->session
);
1982 s
->session
= s
->psksession
;
1983 s
->psksession
= NULL
;