50 lines
2.0 KiB
C
50 lines
2.0 KiB
C
/* $OpenBSD: ssl_tlsext.h,v 1.34 2024/03/26 03:44:11 beck Exp $ */
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/*
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* Copyright (c) 2016, 2017 Joel Sing <jsing@openbsd.org>
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* Copyright (c) 2017 Doug Hogan <doug@openbsd.org>
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* Copyright (c) 2019 Bob Beck <beck@openbsd.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#ifndef HEADER_SSL_TLSEXT_H
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#define HEADER_SSL_TLSEXT_H
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/* TLSv1.3 - RFC 8446 Section 4.2. */
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#define SSL_TLSEXT_MSG_CH 0x0001 /* ClientHello */
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#define SSL_TLSEXT_MSG_SH 0x0002 /* ServerHello */
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#define SSL_TLSEXT_MSG_EE 0x0004 /* EncryptedExtension */
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#define SSL_TLSEXT_MSG_CT 0x0008 /* Certificate */
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#define SSL_TLSEXT_MSG_CR 0x0010 /* CertificateRequest */
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#define SSL_TLSEXT_MSG_NST 0x0020 /* NewSessionTicket */
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#define SSL_TLSEXT_MSG_HRR 0x0040 /* HelloRetryRequest */
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__BEGIN_HIDDEN_DECLS
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int tlsext_alpn_check_format(CBS *cbs);
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int tlsext_sni_is_valid_hostname(CBS *cbs, int *is_ip);
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int tlsext_client_build(SSL *s, uint16_t msg_type, CBB *cbb);
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int tlsext_client_parse(SSL *s, uint16_t msg_type, CBS *cbs, int *alert);
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int tlsext_server_build(SSL *s, uint16_t msg_type, CBB *cbb);
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int tlsext_server_parse(SSL *s, uint16_t msg_type, CBS *cbs, int *alert);
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int tlsext_extension_seen(SSL *s, uint16_t);
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int tlsext_extension_processed(SSL *s, uint16_t);
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int tlsext_randomize_build_order(SSL *s);
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__END_HIDDEN_DECLS
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#endif
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