Esempi in C# (CSharp) per ECP.gety

Esempio n. 1

/* Optimal R-ate pairing */
    public static FP12 ate(ECP2 P, ECP Q)
    {
        FP2  f = new FP2(new BIG(ROM.CURVE_Fra), new BIG(ROM.CURVE_Frb));
        BIG  x = new BIG(ROM.CURVE_Bnx);
        BIG  n = new BIG(x);
        ECP2 K = new ECP2();
        FP12 lv;

        n.pmul(6);
        n.dec(2);
        n.norm();
        P.affine();
        Q.affine();
        FP Qx = new FP(Q.getx());
        FP Qy = new FP(Q.gety());

        ECP2 A = new ECP2();
        FP12 r = new FP12(1);

        A.copy(P);
        int nb = n.nbits();

        for (int i = nb - 2; i >= 1; i--)
        {
            lv = line(A, A, Qx, Qy);
            r.smul(lv);

            if (n.bit(i) == 1)
            {
                lv = line(A, P, Qx, Qy);

                r.smul(lv);
            }
            r.sqr();
        }

        lv = line(A, A, Qx, Qy);
        r.smul(lv);

/* R-ate fixup */

        r.conj();

        K.copy(P);
        K.frob(f);
        A.neg();
        lv = line(A, K, Qx, Qy);
        r.smul(lv);
        K.frob(f);
        K.neg();
        lv = line(A, K, Qx, Qy);
        r.smul(lv);

        return(r);
    }