public ECSignature Sign(BigInteger message)
{
message = Curve.TruncateHash(message);
ECSignature signature = null;
do
{
var random = BigIntegerExt.ModRandom(Curve.Order);
signature = SignTruncated(message, random);
} while (signature == null);
return(signature);
}
public bool VerifySignature(BigInteger hash, ECSignature signature)
{
hash = Curve.TruncateHash(hash);
var w = signature.S.ModInverse(Curve.Order);
var u1 = (hash * w) % Curve.Order;
var u2 = (signature.R * w) % Curve.Order;
var p = Curve.G * u1 + Point * u2;
return(BigIntegerExt.ModEqual(signature.R, p.X, Curve.Order));
}
