Examples of org.bouncycastle.pqc.math.ntru.polynomial.BigIntPolynomial.mult()

Package org.bouncycastle.pqc.math.ntru.polynomial

Class org.bouncycastle.pqc.math.ntru.polynomial.BigIntPolynomial

Examples of org.bouncycastle.pqc.math.ntru.polynomial.BigIntPolynomial.mult()

org.bouncycastle.pqc.math.ntru.polynomial.BigIntPolynomial.mult()
Multiplies the polynomial by another, taking the indices mod N. Does not change this polynomial but returns the result as a new polynomial.
Both polynomials must have the same number of coefficients. @param poly2 the polynomial to multiply by @return a new polynomial

            r = BigIntEuclidean.calculate(rf.res, rg.res);
        }
        while (!r.gcd.equals(ONE));


        BigIntPolynomial A = (BigIntPolynomial)rf.rho.clone();
        A.mult(r.x.multiply(BigInteger.valueOf(q)));
        BigIntPolynomial B = (BigIntPolynomial)rg.rho.clone();
        B.mult(r.y.multiply(BigInteger.valueOf(-q)));


        BigIntPolynomial C;
        if (params.keyGenAlg == NTRUSigningKeyGenerationParameters.KEY_GEN_ALG_RESULTANT)

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        while (!r.gcd.equals(ONE));


        BigIntPolynomial A = (BigIntPolynomial)rf.rho.clone();
        A.mult(r.x.multiply(BigInteger.valueOf(q)));
        BigIntPolynomial B = (BigIntPolynomial)rg.rho.clone();
        B.mult(r.y.multiply(BigInteger.valueOf(-q)));


        BigIntPolynomial C;
        if (params.keyGenAlg == NTRUSigningKeyGenerationParameters.KEY_GEN_ALG_RESULTANT)
        {
            int[] fRevCoeffs = new int[N];

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            IntegerPolynomial t = f.mult(fRev);
            t.add(g.mult(gRev));
            Resultant rt = t.resultant();
            C = fRev.mult(B);   // fRev.mult(B) is actually faster than new SparseTernaryPolynomial(fRev).mult(B), possibly due to cache locality?
            C.add(gRev.mult(A));
            C = C.mult(rt.rho);
            C.div(rt.res);
        }
        else
        {   // KeyGenAlg.FLOAT
            // calculate ceil(log10(N))

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