openid connect - How to set redirect_uri parameter on OpenIdConnectOptions for ASP.NET Core

Question

I'm trying to connect an ASP.NET application to Salesforce using OpenId, Currently this is my connecting code so far. I think I got everything except the redirect_uri parameter, which has to match the value on the other end exactly.

 app.UseCookieAuthentication(x =>
        {
            x.AutomaticAuthenticate = true;
            x.CookieName = "MyApp";
            x.CookieSecure = CookieSecureOption.Always;
            x.AuthenticationScheme = "Cookies";
   
        });

        JwtSecurityTokenHandler.DefaultInboundClaimTypeMap = new Dictionary<string, string>();


        app.UseOpenIdConnectAuthentication(x =>
        {
            x.AutomaticAuthenticate = true;
            x.Authority = "https://login.salesforce.com";
            x.ClientId = "CLIENT_ID_HERE";
            x.ResponseType = "code";
            x.AuthenticationScheme = "oidc";
            x.CallbackPath = new PathString("/services/oauth2/success");
            //x.RedirectUri = "https://login.salesforce.com/services/oauth2/success";
            x.Scope.Add("openid");
            x.Scope.Add("profile");
            x.Scope.Add("email");                
        });

But RedirectUri isn't a valid parameter to pass. What is the right way to set it?

Answer 1

You need to set an event listen for the OnRedirectToIdentityProvider

in your case:

x.Events.OnRedirectToIdentityProvider = async n =>
{
    n.ProtocolMessage.RedirectUri = <Redirect URI string>;
    await Task.FromResult(0);
}