public string SingGen(byte[] h, BigInteger d)
{
BigInteger alpha = BigInteger.Parse(SupportEDS.DecStringFromByteArray(h));
BigInteger e = alpha % this.curv.N;
if (e == 0)
{
e = 1;
}
BigInteger k = new BigInteger();
EllipticCurve_Point C = new EllipticCurve_Point();
BigInteger r = new BigInteger();
BigInteger s = new BigInteger();
do
{
Random rnd = new Random();
do
{
k = Maths.RandBigInteger(Maths.Length(this.curv.N), rnd);
}while ((k < 0) || (k > this.curv.N));
curv.Mult(k, this.curv.G, ref C);
r = C.X % this.curv.N;
s = ((r * d) + (k * e)) % this.curv.N;
}while ((r == 0) || (s == 0));
int midl = Maths.Length(this.curv.N) / 4;
string Rvector = SupportEDS.Add0PaddingToString(r.ToString("X"), midl);
string Svector = SupportEDS.Add0PaddingToString(s.ToString("X"), midl);
return(Rvector + Svector);
}
