public static byte[] SignBytes(byte[] message, byte[] secretPhrase)
{
var digest = SimpleHash(secretPhrase);
var s = Curve25519.Keygen(digest).S;
var m = SimpleHash(message);
var x = SimpleHash(m, s);
var y = Curve25519.Keygen(x).P;
var h = SimpleHash(m, y);
var v = Curve25519.Sign(h, x, s);
return(v.Concat(h).ToArray());
}
public static byte[] GetPublicKey(byte[] secretPhrase)
{
var digest = SimpleHash(secretPhrase);
return(Curve25519.Keygen(digest).P);
}