122 lines
5.1 KiB
C++
122 lines
5.1 KiB
C++
/************************************************************************************//**
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* \file SeedNKey.cpp
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* \brief XCP Seed/Key algorithms
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* \internal
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*----------------------------------------------------------------------------------------
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* C O P Y R I G H T
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*----------------------------------------------------------------------------------------
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* Copyright (c) 2014 by Feaser http://www.feaser.com All rights reserved
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*
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*----------------------------------------------------------------------------------------
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* L I C E N S E
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*----------------------------------------------------------------------------------------
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* This file is part of OpenBLT. OpenBLT is free software: you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as published by the Free
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* Software Foundation, either version 3 of the License, or (at your option) any later
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* version.
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*
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* OpenBLT is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
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* without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU General Public License for more details.
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*
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* You have received a copy of the GNU General Public License along with OpenBLT. It
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* should be located in ".\Doc\license.html". If not, contact Feaser to obtain a copy.
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*
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* \endinternal
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****************************************************************************************/
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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/****************************************************************************************
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* Type definitions
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****************************************************************************************/
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typedef unsigned char BYTE;
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typedef unsigned long DWORD;
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/****************************************************************************************
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* Defines
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****************************************************************************************/
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/* XCP dll function type info */
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#define XCP_DLL_EXPORT __declspec(dllexport) __cdecl
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/* XCP supported resources */
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#define kXcpResPGM 0x10 /* ProGraMing */
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#define kXcpResSTIM 0x08 /* data STIMulation */
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#define kXcpResDAQ 0x04 /* Data AcQuisition */
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#define kXcpResCALPAG 0x01 /* CALibration and PAGing */
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/****************************************************************************************
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** NAME: XCP_ComputeKeyFromSeed
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** PARAMETER: resource : resource for which the unlock key is requested
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** seedLen : length of the seed
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** seedPtr : pointer to the seed data
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** keyLenPtr: pointer where to store the key length
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** keyPtr : pointer where to store the key data
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** RETURN VALUE: 0: success, 1: error
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** DESCRIPTION: Computes the key for the requested resource.
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**
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****************************************************************************************/
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/************************************************************************************//**
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** \brief Computes the key for the requested resource.
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** \param resource resource for which the unlock key is requested
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** \param seedLen length of the seed
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** \param seedPtr pointer to the seed data
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** \param keyLenPtr pointer where to store the key length
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** \param keyPtr pointer where to store the key data
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** \return 0 on success, otherwise 1.
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**
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****************************************************************************************/
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DWORD XCP_DLL_EXPORT XCP_ComputeKeyFromSeed( BYTE resource, BYTE seedLen, BYTE *seedPtr,
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BYTE *keyLenPtr, BYTE *keyPtr)
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{
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BYTE i;
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/* Feaser XCP driver example key algorithm for PGM simply
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* decrements the value of each seed by 1
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*/
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if ( resource == kXcpResPGM )
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{
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/* compute the key */
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for ( i=0; i<seedLen; i++)
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{
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keyPtr[i] = seedPtr[i] - 1;
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}
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/* set the key length */
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*keyLenPtr = seedLen;
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/* done */
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return 0;
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}
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/* still here, so the resource was unsupported */
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return 1;
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} /*** end of XCP_ComputeKeyFromSeed ***/
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/************************************************************************************//**
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** \brief Computes the key for the requested resource.
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** \param resourcePtr pointer where to store the supported resources for the key
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** computation.
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** \return 0 on success, otherwise 1.
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**
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****************************************************************************************/
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DWORD XCP_DLL_EXPORT XCP_GetAvailablePrivileges( BYTE *resourcePtr)
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{
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/* this dll supports key computation algorithm for the PGM resource */
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*resourcePtr = (kXcpResPGM);
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return 0;
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} /*** end of XCP_GetAvailablePrivileges ***/
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#ifdef __cplusplus
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}
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#endif
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/*********************************** end of SeedNKey.cpp *******************************/
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