function encryptFile(filePath, encryptedFilePath, key)
    local decryptedFile = fileOpen(filePath, true)
    if decryptedFile then
        local fileContent = fileRead(decryptedFile, fileGetSize(decryptedFile))

        fileClose(decryptedFile)

        fileContent = teaEncode(fileContent, key)
        if fileContent then
            local encryptedFile = fileCreate(encryptedFilePath)
            if encryptedFile then
                fileWrite(encryptedFile, fileContent)
                fileFlush(encryptedFile)
                fileClose(encryptedFile)

                return true
            end
        end
    end
    return false
end

function decryptFile(filePath, decryptedFilePath, key)
    local encryptedFile = fileOpen(filePath, true)
    if encryptedFile then
        local fileContent = fileRead(encryptedFile, fileGetSize(encryptedFile))

        fileClose(encryptedFile)

        local fileContent = teaDecode(fileContent, key)
        if fileContent then
            local decryptedFile = fileCreate(decryptedFilePath)
            if decryptedFile then
                fileWrite(decryptedFile, fileContent)
                fileFlush(decryptedFile)
                fileClose(decryptedFile)

                return true
            end
        end
    end
    return false
end

addEventHandler("onClientResourceStart", resourceRoot,
    function ()
        local key = "K3TOEQaK7W+KZ1m4"

        encryptFile("car.txd", "e_car.txd", key)
        decryptFile("e_car.txd", "d_car.txd", key)
    end
)