IMAGE FORMING APPARATUS, INFORMATION PROCESSING SYSTEM, CONTROL METHOD, AND RECORDING MEDIUM IN ACCORDANCE WITH A CONTROL COMMAND FROM A DEVICE DRIVER

An image forming apparatus receives a scan command from a device driver with which an information processing apparatus is provided, and discriminates whether a control protocol of the scan command can utilize an authentication function when the authentication function is enabled in the image forming apparatus. When it is discriminated that the control protocol of the scan command cannot utilize the authentication function, the image forming apparatus displays an authentication information input screen, conducts authentication processing using authentication information that was input according to manipulation of the input screen, and executes scan processing of an image in accordance with the scan command when authentication is successful.