1 /*************************************************************************** 2 * Copyright (c) 2024 Microsoft Corporation 3 * 4 * This program and the accompanying materials are made available under the 5 * terms of the MIT License which is available at 6 * https://opensource.org/licenses/MIT. 7 * 8 * SPDX-License-Identifier: MIT 9 **************************************************************************/ 10 11 12 /**************************************************************************/ 13 /**************************************************************************/ 14 /** */ 15 /** NetX Component */ 16 /** */ 17 /** DES Encryption Standard (DES) */ 18 /** */ 19 /**************************************************************************/ 20 /**************************************************************************/ 21 22 23 /**************************************************************************/ 24 /* */ 25 /* COMPONENT DEFINITION RELEASE */ 26 /* */ 27 /* nx_des.h PORTABLE C */ 28 /* 6.1 */ 29 /* AUTHOR */ 30 /* */ 31 /* Yuxin Zhou, Microsoft Corporation */ 32 /* */ 33 /* DESCRIPTION */ 34 /* */ 35 /* This file defines the NetX DES encryption algorithm, derived */ 36 /* principally from FIPS-46. From an 8 bytes of raw input, the DES */ 37 /* encryption routine produces an 8-byte encryption of the input. */ 38 /* Conversely, from an 8-byte encryption, the decryption routine */ 39 /* produces the original 8 bytes of input. Note that the caller must */ 40 /* ensure 8 bytes of input and output are provided. */ 41 /* */ 42 /* It is assumed that nx_api.h and nx_port.h have already been */ 43 /* included. */ 44 /* */ 45 /* RELEASE HISTORY */ 46 /* */ 47 /* DATE NAME DESCRIPTION */ 48 /* */ 49 /* 05-19-2020 Yuxin Zhou Initial Version 6.0 */ 50 /* 09-30-2020 Yuxin Zhou Modified comment(s), */ 51 /* resulting in version 6.1 */ 52 /* */ 53 /**************************************************************************/ 54 55 #ifndef NX_DES_H 56 #define NX_DES_H 57 58 /* Define the DES context structure. */ 59 60 typedef struct NX_DES_STRUCT 61 { 62 63 ULONG nx_des_encryption_keys[32]; /* Contains the encryption keys */ 64 ULONG nx_des_decryption_keys[32]; /* Contains the decryption keys */ 65 } NX_DES; 66 67 68 /* Define the function prototypes for DES. */ 69 70 UINT _nx_des_key_set(NX_DES *context, UCHAR key[8]); 71 UINT _nx_des_encrypt(NX_DES *context, UCHAR source[8], UCHAR destination[8]); 72 UINT _nx_des_decrypt(NX_DES *context, UCHAR source[8], UCHAR destination[8]); 73 VOID _nx_des_process_block(UCHAR source[8], UCHAR destination[8], ULONG keys[32]); 74 75 #endif 76 77
