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); } }