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/***************************************************************************
* Copyright (c) 2024 Microsoft Corporation
* Copyright (c) 2025-present Eclipse ThreadX Contributors
*
* This program and the accompanying materials are made available under the
* terms of the MIT License which is available at
* https://opensource.org/licenses/MIT.
*
* SPDX-License-Identifier: MIT
**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** NetX Secure Component */
/** */
/** Transport Layer Security (TLS) */
/** */
/**************************************************************************/
/**************************************************************************/
#define NX_SECURE_SOURCE_CODE
/* Include necessary system files. */
#include "nx_secure_tls.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_secure_tls_session_protocol_version_override PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function overrides the TLS protocol version to use for the TLS */
/* session. This allows for a different version of TLS to be utilized */
/* even if a newer version is enabled. For example, to use TLSv1.0 for */
/* a specific host but use TLSv1.2 for all other hosts. */
/* */
/* INPUT */
/* */
/* tls_session Pointer to TLS Session */
/* protocol_version Version of TLS to use */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/**************************************************************************/
UINT _nx_secure_tls_session_protocol_version_override(NX_SECURE_TLS_SESSION *tls_session,
USHORT protocol_version)
{
#if (NX_SECURE_TLS_TLS_1_3_ENABLED)
if (protocol_version == NX_SECURE_TLS_VERSION_TLS_1_3)
{
if (tls_session -> nx_secure_tls_1_3_supported)
{
/* Set legacy version to TLS 1.2. */
tls_session -> nx_secure_tls_protocol_version_override = NX_SECURE_TLS_VERSION_TLS_1_2;
}
else
{
return(NX_SECURE_TLS_UNSUPPORTED_TLS_VERSION);
}
}
else
#endif
{
tls_session -> nx_secure_tls_protocol_version_override = protocol_version;
#if (NX_SECURE_TLS_TLS_1_3_ENABLED)
tls_session -> nx_secure_tls_1_3 = NX_FALSE;
#ifndef NX_SECURE_TLS_DISABLE_SECURE_RENEGOTIATION
tls_session -> nx_secure_tls_renegotation_enabled = NX_TRUE;
#endif /* NX_SECURE_TLS_DISABLE_SECURE_RENEGOTIATION */
#endif
}
/* Return completion status. */
return(NX_SUCCESS);
}
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