MFC Endoe

MFC_Encode.cpp

http://study.marearts.com/2017/01/mfc-encode-decode-example-souce-code.html
bool CEPenService_PenCommunicatorDlg::Encode(CString id, CString pass, CString mac)
{
	//char    *bBuff;
	CString    csFile;
	FILE    *pFile;

	char bBuff[100];
	char * cid = WtoC(id);
	char * cpass = WtoC(pass);
	char * cmac = WtoC(mac);
	sprintf_s(bBuff, "%s+%s+%s+", cid, cpass, cmac);
	DWORD    dwFileLen = sizeof(bBuff);
	delete cid;
	delete cpass;
	delete cmac;

  HCRYPTPROV    hProv;
	HCRYPTHASH    hHash;
	HCRYPTKEY    hKey;
	char csPass[100] = "rlawjdgus";
	
	// CSP(Crystographic Service Provider) 핸들 얻기
	if (!CryptAcquireContext(&hProv, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, 0))
	{
		if (!CryptAcquireContext(&hProv, NULL, MS_ENHANCED_PROV, PROV_RSA_FULL, CRYPT_NEWKEYSET))
		{
			//printf("encode fail");
			return false;
		}
	}

	// 해쉬 만들기
	CryptCreateHash(hProv, CALG_SHA, 0, 0, &hHash);
	// 해쉬 값 계산
	CryptHashData(hHash, (BYTE*)csPass, sizeof(csPass), 0);
	// 키 만들기\tab
	CryptDeriveKey(hProv, CALG_RC4, hHash, 0x0080 * 0x10000, &hKey);
	// 암호화\tab
	CryptEncrypt(hKey, 0, TRUE, 0, (BYTE*)bBuff, &dwFileLen, dwFileLen);
	// 해쉬 없애기
	CryptDestroyHash(hHash);
	// CSP 핸들 풀어주기
	CryptReleaseContext(hProv, 0);


	FILE* fp;
	// 암호화된 파일 저장하기
	fopen_s(&fp, "AutoLogIn.CPR", "wb");
	fwrite(bBuff, 1, dwFileLen, fp);
	fclose(fp);
  
	return true;
}

http://study.marearts.com/2017/01/mfc-encode-decode-example-souce-code.html