public bool SingVer(byte[] H, string sing, EllipticCurve_Point Q)
{
int midl = Maths.Length(this.curv.N) / 4;
string Rvector = sing.Substring(0, midl);
string Svector = sing.Substring(midl, midl);
BigInteger r = BigInteger.Parse(SupportEDS.DecStringFromHexString(Rvector));
BigInteger s = BigInteger.Parse(SupportEDS.DecStringFromHexString(Svector));
if ((r < 1) || (r > (this.curv.N - 1)) || (s < 1) || (s > (this.curv.N - 1)))
{
return(false);
}
BigInteger alpha = BigInteger.Parse(SupportEDS.DecStringFromByteArray(H));
BigInteger e = alpha % this.curv.N;
if (e == 0)
{
e = 1;
}
BigInteger v = Maths.GetInverse(e, this.curv.N);
BigInteger z1 = (s * v) % this.curv.N;
BigInteger z2 = this.curv.N + ((-(r * v)) % this.curv.N);
EllipticCurve_Point A = new EllipticCurve_Point();
EllipticCurve_Point B = new EllipticCurve_Point();
EllipticCurve_Point C = new EllipticCurve_Point();
curv.Mult(z1, this.curv.G, ref A);
curv.Mult(z2, Q, ref B);
curv.Sum(A, B, ref C);
BigInteger R = C.X % this.curv.N;
if (R == r)
{
return(true);
}
else
{
return(false);
}
}
