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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 Component */
/** */
/** DES Encryption Standard (DES) */
/** */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/* */
/* COMPONENT DEFINITION RELEASE */
/* */
/* nx_des.h PORTABLE C */
/* 6.4.3 */
/* AUTHOR */
/* */
/* Yuxin Zhou, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This file defines the NetX DES encryption algorithm, derived */
/* principally from FIPS-46. From an 8 bytes of raw input, the DES */
/* encryption routine produces an 8-byte encryption of the input. */
/* Conversely, from an 8-byte encryption, the decryption routine */
/* produces the original 8 bytes of input. Note that the caller must */
/* ensure 8 bytes of input and output are provided. */
/* */
/* It is assumed that nx_api.h and nx_port.h have already been */
/* included. */
/* */
/**************************************************************************/
#ifndef NX_DES_H
#define NX_DES_H
/* Define the DES context structure. */
typedef struct NX_DES_STRUCT
{
ULONG nx_des_encryption_keys[32]; /* Contains the encryption keys */
ULONG nx_des_decryption_keys[32]; /* Contains the decryption keys */
} NX_DES;
/* Define the function prototypes for DES. */
UINT _nx_des_key_set(NX_DES *context, UCHAR key[8]);
UINT _nx_des_encrypt(NX_DES *context, UCHAR source[8], UCHAR destination[8]);
UINT _nx_des_decrypt(NX_DES *context, UCHAR source[8], UCHAR destination[8]);
VOID _nx_des_process_block(UCHAR source[8], UCHAR destination[8], ULONG keys[32]);
#endif
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