/* $OpenBSD: ssl_tlsext.h,v 1.33 2023/04/23 18:51:53 tb Exp $ */ /* * Copyright (c) 2016, 2017 Joel Sing * Copyright (c) 2017 Doug Hogan * Copyright (c) 2019 Bob Beck * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef HEADER_SSL_TLSEXT_H #define HEADER_SSL_TLSEXT_H /* TLSv1.3 - RFC 8446 Section 4.2. */ #define SSL_TLSEXT_MSG_CH 0x0001 /* ClientHello */ #define SSL_TLSEXT_MSG_SH 0x0002 /* ServerHello */ #define SSL_TLSEXT_MSG_EE 0x0004 /* EncryptedExtension */ #define SSL_TLSEXT_MSG_CT 0x0008 /* Certificate */ #define SSL_TLSEXT_MSG_CR 0x0010 /* CertificateRequest */ #define SSL_TLSEXT_MSG_NST 0x0020 /* NewSessionTicket */ #define SSL_TLSEXT_MSG_HRR 0x0040 /* HelloRetryRequest */ __BEGIN_HIDDEN_DECLS int tlsext_alpn_check_format(CBS *cbs); int tlsext_sni_is_valid_hostname(CBS *cbs, int *is_ip); int tlsext_client_build(SSL *s, uint16_t msg_type, CBB *cbb); int tlsext_client_parse(SSL *s, uint16_t msg_type, CBS *cbs, int *alert); int tlsext_server_build(SSL *s, uint16_t msg_type, CBB *cbb); int tlsext_server_parse(SSL *s, uint16_t msg_type, CBS *cbs, int *alert); int tlsext_extension_seen(SSL *s, uint16_t); int tlsext_randomize_build_order(SSL *s); __END_HIDDEN_DECLS #endif