private async void MainForm_Load(object sender, EventArgs e)
{
await Task.Delay(3000);
_connection = new HubConnectionBuilder()
.WithUrl("http://localhost:5000/hub")
.Build();
_connection.On <int, int, int>("ReceiveKeys", async(q, a, yb) =>
{
var xc = DiffieHellmanService.GetX(q);
var yc = DiffieHellmanService.GetY(a, xc, q);
_key = DiffieHellmanService.GetKey(yb, xc, q);
await _connection.InvokeAsync("ReceiveKey", (int)yc);
UserNameTextBox.Enabled = true;
MessageTextBox.Enabled = true;
SendButton.Enabled = true;
});
_connection.On <string, string>("Chat", (name, message) =>
{
ChatTextBox.Font = new Font(ChatTextBox.SelectionFont, FontStyle.Bold);
ChatTextBox.AppendText($"{name}: {message}");
ChatTextBox.AppendText("\n");
});
await _connection.StartAsync();
await _connection.InvokeAsync("GetKeys");
}
public async Task GetKeys()
{
var q = DiffieHellmanService.GetQ();
var a = DiffieHellmanService.GetA(q);
var x = DiffieHellmanService.GetX(q);
var y = DiffieHellmanService.GetY(a, x, q);
var keys = new Keys(q, a, x, y);
_keys.TryAdd(Context.ConnectionId, keys);
await Clients.Caller.SendAsync("ReceiveKeys", q, a, (int)y);
}
public async Task ReceiveKey(int y)
{
var keys = _keys[Context.ConnectionId];
keys.Key = DiffieHellmanService.GetKey(y, keys.X, keys.Q);
}
