org.bouncycastle.pqc.math.ntru.polynomial.test.PolynomialGenerator Maven / Gradle / Ivy

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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.8. Note: this package includes the NTRU encryption algorithms.

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package org.bouncycastle.pqc.math.ntru.polynomial.test;

import java.util.Random;

import org.bouncycastle.pqc.math.ntru.polynomial.IntegerPolynomial;

public class PolynomialGenerator
{
    /**
     * Creates a random polynomial with N coefficients
     * between 0 and q-1.
     *
     * @param N length of the polynomial
     * @param q coefficients will all be below this number
     * @return a random polynomial
     */
    public static IntegerPolynomial generateRandom(int N, int q)
    {
        Random rng = new Random();
        int[] coeffs = new int[N];
        for (int i = 0; i < N; i++)
        {
            coeffs[i] = rng.nextInt(q);
        }
        return new IntegerPolynomial(coeffs);
    }
}