libraries/spongycastle/core/src/main/java/org/spongycastle/math/ec/AbstractECMultiplier.java


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package org.spongycastle.math.ec;

import java.math.BigInteger;

public abstract class AbstractECMultiplier implements ECMultiplier
{
    public ECPoint multiply(ECPoint p, BigInteger k)
    {
        int sign = k.signum();
        if (sign == 0 || p.isInfinity())
        {
            return p.getCurve().getInfinity();
        }

        ECPoint positive = multiplyPositive(p, k.abs());
        return sign > 0 ? positive : positive.negate();
    }

    protected abstract ECPoint multiplyPositive(ECPoint p, BigInteger k);
}