Authenticate in GeoServer with ASP.NET and IIS

I don't know if this is a dumb question, but how can I combine the ASP.NET authentication with OpenLayers?

I created a Login page to authenticate in OpenLayers (in C#, server side), this is my code

Uri uri = new Uri("http://"+username+":"+password+"@localhost:1979/geoserver/wms");
if (uri.Scheme == Uri.UriSchemeHttp)
{
    HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(uri);
    request.Method = WebRequestMethods.Http.Post;
           
    HttpWebResponse response = (HttpWebResponse)request.GetResponse();
    StreamReader reader = new StreamReader(response.GetResponseStream()); string tmp = reader.ReadToEnd();
    response.Close();
    Response.Write(tmp);
}

I don't know if this is the right approach to resolve my problem, anyway if I reach my goal (authenticate with username and password in GeoServer), how can I combine this authentication with OpenLayers, which is in user side (JavaScript)

Thanks in advance.

To authenticate with the GeoSerever from JavaScript side, you must to make a post to the GeoServer autentication servlet(j_spring_security_check). Try use this login function:

     function login (options) {
    // url del servlet del geoserver
    var url = options.server + "/geoserver/j_spring_security_check";
    // parametros para el login
    params = "username=" + options["user"] + "&password="
                + options["password"];

    var contentType = "application/x-www-form-urlencoded";
    //se inicializa la petición ajax
    var ajax = $.ajax({
        data : params,
        type : "POST",
        contentType : contentType,
        url : url
    });
    // se ejecuta cuando la peticion finaliza
    ajax.done(function() {

        if ($.cookie("JSESSIONID") != null && options && options.success) {
            options.success();
        }
    });
    // si ocurrio un error al realizar la peticion
    ajax.fail(function(data) {
        if (options && options.failure) {
            options.failure(data);
        }
    });
    // se ejecuta siempre al final de la petición, sin importar que esta
    // haya fallado
    ajax.always(function() {
        if (options && options.always) {
            options.always();
        }
    });
};

And use this way

 login({
    user:"admin" //geoserver user
    password: "adminPassword", 
    server : "http://192.168.10.1:8080", //geoserver host
    success : function(){
        alert("Login OK!");
    },
    failure : function(){
        alert("Login fail!");
    }
});