1*de0e0e4dSAntonio Huete Jimenez /* $OpenBSD: ssl_tlsext.h,v 1.32 2022/08/04 09:27:36 tb Exp $ */ 272c33676SMaxim Ag /* 372c33676SMaxim Ag * Copyright (c) 2016, 2017 Joel Sing <jsing@openbsd.org> 472c33676SMaxim Ag * Copyright (c) 2017 Doug Hogan <doug@openbsd.org> 572c33676SMaxim Ag * Copyright (c) 2019 Bob Beck <beck@openbsd.org> 672c33676SMaxim Ag * 772c33676SMaxim Ag * Permission to use, copy, modify, and distribute this software for any 872c33676SMaxim Ag * purpose with or without fee is hereby granted, provided that the above 972c33676SMaxim Ag * copyright notice and this permission notice appear in all copies. 1072c33676SMaxim Ag * 1172c33676SMaxim Ag * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 1272c33676SMaxim Ag * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 1372c33676SMaxim Ag * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 1472c33676SMaxim Ag * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 1572c33676SMaxim Ag * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 1672c33676SMaxim Ag * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 1772c33676SMaxim Ag * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 1872c33676SMaxim Ag */ 1972c33676SMaxim Ag 2072c33676SMaxim Ag #ifndef HEADER_SSL_TLSEXT_H 2172c33676SMaxim Ag #define HEADER_SSL_TLSEXT_H 2272c33676SMaxim Ag 2372c33676SMaxim Ag /* TLSv1.3 - RFC 8446 Section 4.2. */ 2472c33676SMaxim Ag #define SSL_TLSEXT_MSG_CH 0x0001 /* ClientHello */ 2572c33676SMaxim Ag #define SSL_TLSEXT_MSG_SH 0x0002 /* ServerHello */ 2672c33676SMaxim Ag #define SSL_TLSEXT_MSG_EE 0x0004 /* EncryptedExtension */ 2772c33676SMaxim Ag #define SSL_TLSEXT_MSG_CT 0x0008 /* Certificate */ 2872c33676SMaxim Ag #define SSL_TLSEXT_MSG_CR 0x0010 /* CertificateRequest */ 2972c33676SMaxim Ag #define SSL_TLSEXT_MSG_NST 0x0020 /* NewSessionTicket */ 30cca6fc52SDaniel Fojt #define SSL_TLSEXT_MSG_HRR 0x0040 /* HelloRetryRequest */ 3172c33676SMaxim Ag 3272c33676SMaxim Ag __BEGIN_HIDDEN_DECLS 3372c33676SMaxim Ag 34*de0e0e4dSAntonio Huete Jimenez int tlsext_alpn_check_format(CBS *cbs); 35*de0e0e4dSAntonio Huete Jimenez int tlsext_sni_is_valid_hostname(CBS *cbs, int *is_ip); 3672c33676SMaxim Ag 378edacedfSDaniel Fojt int tlsext_client_build(SSL *s, uint16_t msg_type, CBB *cbb); 388edacedfSDaniel Fojt int tlsext_client_parse(SSL *s, uint16_t msg_type, CBS *cbs, int *alert); 3972c33676SMaxim Ag 408edacedfSDaniel Fojt int tlsext_server_build(SSL *s, uint16_t msg_type, CBB *cbb); 418edacedfSDaniel Fojt int tlsext_server_parse(SSL *s, uint16_t msg_type, CBS *cbs, int *alert); 4272c33676SMaxim Ag 4372c33676SMaxim Ag int tlsext_extension_seen(SSL *s, uint16_t); 44*de0e0e4dSAntonio Huete Jimenez 4572c33676SMaxim Ag __END_HIDDEN_DECLS 4672c33676SMaxim Ag 4772c33676SMaxim Ag #endif 48