Program.cs

using System.Text.Json;
using WebAuthn_Client_.NET;
using WebAuthnClient;

FIDOWebAuthn fido = new();
fido.CredLen = 32;

////Test with WebAuthn.io
//var webauth = new WebAuthnIO("test-session");

//// Registration
//var opts = await webauth.GetRegistrationOptionsAsync(webauth.GetUser());
//var fidostr = fido.Create(opts);
//string teststr = JsonSerializer.Serialize(fidostr, new JsonSerializerOptions { WriteIndented = true });

//Console.WriteLine("Registration");
//Console.WriteLine(teststr);

//await webauth.GetRegistrationVerificationAsync(webauth.GetUser(), teststr);

//// Authentication
//opts = await webauth.GetAuthenticationOptionsAsync();
//Console.WriteLine();
//Console.WriteLine("Authentication");

//var authResp = fido.Get(opts);
//var authObj = new AuthenticationResponseJSON()
//{
//    Id = authResp.Id,
//    RawId = authResp.RawId,
//    Type = authResp.Type,
//    Response = authResp.Response
//};

//Console.WriteLine(JsonSerializer.Serialize(authResp));

//await webauth.GetAuthenticationVerificationAsync(authObj);

//Console.WriteLine("--- Test Completed ---");

while (true)
{
    Console.WriteLine("Origin: ");
    string? origin = Console.ReadLine() ?? "";
    origin = origin.Trim() == "" ? null : origin;

    Console.WriteLine("create/get");
    string cmd = Console.ReadLine() ?? "";
    try
    {
        if (cmd == "create")
        {
            Console.WriteLine("Input:");
            string str = Console.ReadLine() ?? "";
            var op = fido.Create(str, origin);
            string opstr = JsonSerializer.Serialize(op, new JsonSerializerOptions { WriteIndented = true });

            Console.WriteLine();
            Console.WriteLine(opstr);
        }
        else
        {
            Console.WriteLine("Input:");
            string str = Console.ReadLine() ?? "";
            var op = fido.Get(str, origin);
            string opstr = JsonSerializer.Serialize(op, new JsonSerializerOptions { WriteIndented = true });

            Console.WriteLine();
            Console.WriteLine(opstr);
        }
    }
    catch (Exception ex)
    {
        Console.WriteLine("Error: " + ex.Message);
    }
}