public static byte[] ECDHKeyExchange(Uri URL, string Endpoint = "")
{
byte[] key = default(byte[]);
using (ECDiffieHellmanCng AsymAlgo = new ECDiffieHellmanCng())
{
var publicKey = AsymAlgo.PublicKey.ToXmlString();
byte[] r = Comms.HttpPost(URL, Endpoint, Encoding.UTF8.GetBytes(publicKey));
ECDiffieHellmanCngPublicKey peerPublicKey = ECDiffieHellmanCngPublicKey.FromXmlString(Encoding.UTF8.GetString(r));
key = AsymAlgo.DeriveKeyMaterial(peerPublicKey);
}
return(key);
}
