C++ (Cpp) EncryptDecryptFile Examples

Example #1

File: RSACert.cpp Project: dbremner/Windows-classic-samples

void _tmain(int argc, TCHAR **argv)
{
    BOOL fEncrypt = FALSE;
    LPTSTR lpszCertificateName = NULL;
    LPTSTR lpszCertificateStoreName = NULL;
    LPTSTR lpszInputFileName = NULL;
    LPTSTR lpszOutputFileName = NULL;
    DWORD dwCertStoreOpenFlags = CERT_SYSTEM_STORE_CURRENT_USER;

    if (argc != 7)
    {
        PrintUsage();
        return;
    }

    /* Check whether the action to be performed is encrypt or decrypt */
    if (_tcsicmp(argv[1], _T("/e")) == 0)
    {
        fEncrypt = TRUE;
    }
    else if (_tcsicmp(argv[1], _T("/d")) == 0)
    {
        fEncrypt = FALSE;
    }
    else
    {
        PrintUsage();
        return;
    }

    lpszCertificateName = argv[2];
    lpszCertificateStoreName = argv[3];

    /* Check whether the certificate store to be opened is user or machine */
    if (_tcsicmp(argv[4], _T("/u")) == 0)
    {
        dwCertStoreOpenFlags = CERT_SYSTEM_STORE_CURRENT_USER;
    }
    else if (_tcsicmp(argv[4], _T("/m")) == 0)
    {
        dwCertStoreOpenFlags = CERT_SYSTEM_STORE_LOCAL_MACHINE;
    }
    else
    {
        PrintUsage();
        return;
    }

    lpszInputFileName = argv[5];
    lpszOutputFileName = argv[6];

    EncryptDecryptFile(lpszCertificateName,
                       lpszCertificateStoreName,
                       dwCertStoreOpenFlags,
                       lpszInputFileName,
                       lpszOutputFileName,
                       fEncrypt);
}

Example #2

File: ConfigFile.cpp Project: bestustc/LINUX-WriteReadLock

bool ConfigFile::Load(const std::string &filename)
{
	if (filename.empty())
    {
        return false;
    }
    in_close();
    fin=fopen(filename.c_str(),"rt");

#ifndef WIN32
	if (fin == NULL)
	{			
		//add some logic for encryption file
		//if file not exit
		//add .enc to filename;
		//try to open the encrypted file again.
		//if still not exit,return false;
		//else decrypt the file to a new file named fileName.tmp,add tempfileName=ileName.tmp
		//open the temp file to fin.
		//if still not exit,return false;

		std::string strEncryptedFile;
		char        acDecryptedFile[256];
		bool        status=false;
		char        acBaseName[256];
		char        acTmpBuf[256];
		char        *szDstCur = acTmpBuf;
		const char  *szSrcCur = filename.c_str() + filename.length() - 1;

		memset(acTmpBuf, 0, sizeof(acTmpBuf));		
		while(szSrcCur >= filename.c_str())
		{			
			if('\\' == *szSrcCur || '/' == *szSrcCur) break;
			if(szSrcCur == filename.c_str())
			{
				*szDstCur = *szSrcCur;
				break;
			}
			*szDstCur++ = *szSrcCur--;
		}
		
		if(strlen(acTmpBuf) > 0)
		{
			szSrcCur = acTmpBuf + strlen(acTmpBuf) - 1;
			szDstCur = acBaseName;
			while(szSrcCur >= acTmpBuf) *szDstCur++ = *szSrcCur--;
			*szDstCur = '\0';
		}
#ifdef WIN32
		UTILITY::Snprintf(acDecryptedFile, sizeof(acDecryptedFile), "%s.Dec", acBaseName);
#else
		UTILITY::Snprintf(acDecryptedFile, sizeof(acDecryptedFile), "/tmp/%s.Dec", acBaseName);
#endif
		strEncryptedFile = filename;
		strEncryptedFile.append(".enc");
		fin = fopen(strEncryptedFile.c_str(), "rt");
		if (NULL == fin)
		{
			printf("File[%s] Not Found\n", strEncryptedFile.c_str());
			return false;
		}

		status = EncryptDecryptFile((char*)strEncryptedFile.c_str(), acDecryptedFile, "CFETS", INDC_ONLY_DECRYPT);
		if (status != true)
		{
			printf("Error in Decrypting File[%s]\n",strEncryptedFile.c_str());
			fclose(fin);
			return false;
		}
		fclose(fin);
		fin = NULL;

		UTILITY::Snprintf(m_acDecryptedFile, sizeof(m_acDecryptedFile), "%s", acDecryptedFile);
		fin = fopen(acDecryptedFile, "rt");
		if (NULL == fin)
		{
			printf("Decrypted File[%s] Not Found\n", acDecryptedFile);
			return false;
		}
	}
#else
	if(NULL == fin)
	{
		printf("Config file[%s] not found\n", filename);
		return false;
	}
#endif
	return true;
}