private static byte[] GetSharedKey(Uri uri)
{
var curve = new NistP521();
var coords = new Coordinates()
{
X = curve.PublicKey.X.ToString(),
Y = curve.PublicKey.Y.ToString()
};
var json = Actions.WriteJson(coords);
var response = Encoding.UTF8.GetString(Http.Post(uri, Encoding.UTF8.GetBytes(json)));
var remoteCoords = Actions.ParseJson((response));
var remotePoint = new PointOnCurve(BigInteger.Parse(remoteCoords.X), BigInteger.Parse(remoteCoords.Y));
return(curve.GetSharedKey(remotePoint, HashFunction.SHA256));
}
/// <summary>
/// NIST P-521 Curve
/// </summary>
/// <param name="Curve">Curve instance</param>
/// <param name="SymmetricCipher">Symmetric cipher to use by default.</param>
public NistP521Endpoint(NistP521 Curve, IE2eSymmetricCipher SymmetricCipher)
: base(Curve, SymmetricCipher)
{
}
/// <summary>
/// NIST P-521 Curve
/// </summary>
/// <param name="Curve">Curve instance</param>
public NistP521Endpoint(NistP521 Curve)
: this(Curve, new Aes256())
{
}
/// <summary>
/// NIST P-521 Curve
/// </summary>
/// <param name="Curve">Curve instance</param>
public NistP521Aes(NistP521 Curve)
: base(Curve)
{
}
