用模式地址原理，隐藏数据

/// @file exam_1_2.c/// @brief exam_1_2 * 用模式地址原理，隐藏数据的实验#include <windows.h>#include <stdlib.h>#include <stdio.h>#include <time.h>#ifndef IN#define IN#endif#ifndef OUT#define OUT#endif#ifndef INOUT#define INOUT#endifvoid fnUseModeAddressHideInfo();BOOL encryptBytesDataToModeAddr( IN unsigned char cByteContent, INOUT void** ppAddrBits76, INOUT void** ppAddrBits54, INOUT void** ppAddrBits32, INOUT void** ppAddrBits10);BOOL decryptBytesDataToModeAddr( OUT unsigned char* pcByteContent, INOUT void** ppAddrBits76, INOUT void** ppAddrBits54, INOUT void** ppAddrBits32, INOUT void** ppAddrBits10);void* GetModeAddrPointer(IN void* pAddrBits76);int main(int argc, char** argv){    fnUseModeAddressHideInfo();    printf("END, press any key to quit\n");    getchar();        return 0;}/// 在每个变量模式地址上隐藏2bits数据void fnUseModeAddressHideInfo(){char cTmp = 0;int iTmp = 0;float fTmp = 0;double dblTmp = 0;unsigned char ucData = 0;void* pBit76 = NULL;void* pBit54 = NULL;void* pBit32 = NULL;void* pBit10 = NULL;srand(time(NULL));/// 不关心数据的值, 只要这些值在隐藏数据后，不被改变即可cTmp = rand() % 127; ///< char数据范围 0 ~ 128iTmp = rand();fTmp = 1.0f * rand() / 100;dblTmp = 1.0 * rand() / 100;// ucData = rand() % 0xff;ucData = 0x5A;// ucData = 0xA5;pBit76 = &cTmp;pBit54 = &iTmp;pBit32 = &fTmp;pBit10 = &dblTmp;/// 打印变量原值printf("original : cTmp is %p\n", cTmp);printf("original : iTmp is %p\n", iTmp);printf("original : fTmp is %p\n", fTmp);printf("original : dblTmp is %p\n", dblTmp);/// 打印要隐藏的数据printf("ucData = %p, encrypt...\n", ucData);/// 加密encryptBytesDataToModeAddr(ucData, &pBit76, &pBit54, &pBit32, &pBit10);/// 保证变量值不变printf("after enc : cTmp is %p\n", cTmp);printf("after enc : iTmp is %p\n", iTmp);printf("after enc : fTmp is %p\n", fTmp);printf("after enc : dblTmp is %p\n", dblTmp);/// 解密ucData = ucData + 13; ///< 先打乱ucData, 可以验证解密后的值是否为ucData原值decryptBytesDataToModeAddr(&ucData, &pBit76, &pBit54, &pBit32, &pBit10);printf("ucData = %p, decrypt over\n", ucData);/// 保证变量值不变printf("cTmp is %p\n", cTmp);printf("iTmp is %p\n", iTmp);printf("fTmp is %p\n", fTmp);printf("dblTmp is %p\n", dblTmp);/// 用指针取变量值printf("use pt get cTmp is %p\n", *((char*)GetModeAddrPointer(pBit76)));printf("use pt get iTmp is %p\n", *((int*)GetModeAddrPointer(pBit54)));printf("use pt get fTmp is %p\n", *((float*)GetModeAddrPointer(pBit32)));printf("use pt get dblTmp is %p\n", *((double*)GetModeAddrPointer(pBit10)));/** run resultoriginal : cTmp is 00000057original : iTmp is 00002CDDoriginal : fTmp is C0000000original : dblTmp is 147AE148ucData = 000000A5, encrypt...after enc : cTmp is 00000057after enc : iTmp is 00002CDDafter enc : fTmp is C0000000after enc : dblTmp is 147AE148ucData = 000000A5, decrypt overcTmp is 00000057iTmp is 00002CDDfTmp is C0000000dblTmp is 147AE148use pt get cTmp is 00000057use pt get iTmp is 00002CDDuse pt get fTmp is C0000000use pt get dblTmp is 147AE148*/}BOOL encryptBytesDataToModeAddr(IN unsigned char cByteContent,INOUT void** ppAddrBits76,INOUT void** ppAddrBits54,INOUT void** ppAddrBits32,INOUT void** ppAddrBits10){BOOL bRc = FALSE;unsigned int iAddr = 0;unsigned int iDataTmp = 0;do {if (((NULL == ppAddrBits76) || (NULL == *ppAddrBits76))|| ((NULL == ppAddrBits54) || (NULL == *ppAddrBits54))|| ((NULL == ppAddrBits32) || (NULL == *ppAddrBits32))|| ((NULL == ppAddrBits10) || (NULL == *ppAddrBits10))){break;}/// save bit76 to addriDataTmp = ((cByteContent >> 6) & 0x3);iAddr = (unsigned int)(*(unsigned int**)ppAddrBits76);iAddr = iAddr & 0xFFFFFFFC;iAddr |= iDataTmp;*(unsigned int**)ppAddrBits76 = (unsigned int *)iAddr;/// save bit54 to addriDataTmp = ((cByteContent >> 4) & 0x3);iAddr = (unsigned int)(*(unsigned int**)ppAddrBits54);iAddr = iAddr & 0xFFFFFFFC;iAddr |= iDataTmp;*(unsigned int**)ppAddrBits54 = (unsigned int *)iAddr;/// save bit32 to addriDataTmp = ((cByteContent >> 2) & 0x3);iAddr = (unsigned int)(*(unsigned int**)ppAddrBits32);iAddr = iAddr & 0xFFFFFFFC;iAddr |= iDataTmp;*(unsigned int**)ppAddrBits32 = (unsigned int *)iAddr;/// save bit10 to addriDataTmp = (cByteContent & 0x3);iAddr = (unsigned int)(*(unsigned int**)ppAddrBits10);iAddr = iAddr & 0xFFFFFFFC;iAddr |= iDataTmp;*(unsigned int**)ppAddrBits10 = (unsigned int *)iAddr;bRc = TRUE;} while (0);return bRc;}BOOL decryptBytesDataToModeAddr(OUT unsigned char* pcByteContent,INOUT void** ppAddrBits76,INOUT void** ppAddrBits54,INOUT void** ppAddrBits32,INOUT void** ppAddrBits10){BOOL bRc = FALSE;unsigned int iAddr = 0;unsigned int iDataTmp = 0;do {if ((NULL == pcByteContent)|| ((NULL == ppAddrBits76) || (NULL == *ppAddrBits76))|| ((NULL == ppAddrBits54) || (NULL == *ppAddrBits54))|| ((NULL == ppAddrBits32) || (NULL == *ppAddrBits32))|| ((NULL == ppAddrBits10) || (NULL == *ppAddrBits10))){break;}*pcByteContent = 0;/// get bit76 to addriDataTmp = (unsigned int)(*ppAddrBits76) & 0x3;*pcByteContent |= (iDataTmp << 6);/// get bit54 to addriDataTmp = (unsigned int)(*ppAddrBits54) & 0x3;*pcByteContent |= (iDataTmp << 4);/// get bit32 to addriDataTmp = (unsigned int)(*ppAddrBits32) & 0x3;*pcByteContent |= (iDataTmp << 2);/// get bit10 to addriDataTmp = (unsigned int)(*ppAddrBits10) & 0x3;*pcByteContent |= iDataTmp;bRc = TRUE;} while (0);return bRc;}void* GetModeAddrPointer(IN void* pAddrBits76){void* pRc = NULL;do {if (NULL == pAddrBits76){break;}pRc = (unsigned int*)((unsigned int)pAddrBits76 & (~3));} while (0);return pRc;}