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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 "nx_secure_tls.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _nx_secure_tls_send_changecipherspec PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Timothy Stapko, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function populates an NX_PACKET with the TLS ChangeCipherSpec */
/* message, which indicates that all further TLS records will be */
/* encrypted ussing the generated session keys. */
/* */
/* INPUT */
/* */
/* tls_session TLS control block */
/* send_packet Packet to be filled */
/* */
/* OUTPUT */
/* */
/* status Completion status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* _nx_secure_dtls_client_handshake DTLS client state machine */
/* _nx_secure_dtls_server_handshake DTLS server state machine */
/* _nx_secure_tls_client_handshake TLS client state machine */
/* _nx_secure_tls_server_handshake TLS server state machine */
/* */
/**************************************************************************/
UINT _nx_secure_tls_send_changecipherspec(NX_SECURE_TLS_SESSION *tls_session, NX_PACKET *send_packet)
{
NX_PARAMETER_NOT_USED(tls_session);
if (((ULONG)(send_packet -> nx_packet_data_end) - (ULONG)(send_packet -> nx_packet_append_ptr)) < 1u)
{
/* Packet buffer is too small to hold random and ID. */
return(NX_SECURE_TLS_PACKET_BUFFER_TOO_SMALL);
}
send_packet -> nx_packet_append_ptr[0] = 0x1;
send_packet -> nx_packet_append_ptr = send_packet -> nx_packet_append_ptr + 1;
send_packet -> nx_packet_length = 1;
return(NX_SUCCESS);
}
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