namespace Org.BouncyCastle.Math.EC.Multiplier{
internal class ReferenceMultiplier
: ECMultiplier
{
/**
* Simple shift-and-add multiplication. Serves as reference implementation
* to verify (possibly faster) implementations in
* {@link org.bouncycastle.math.ec.ECPoint ECPoint}.
*
* @param p The point to multiply.
* @param k The factor by which to multiply.
* @return The result of the point multiplication <code>k * p</code>.
*/
public ECPoint Multiply(ECPoint p, BigInteger k, PreCompInfo preCompInfo)
{
ECPoint q = p.Curve.Infinity;
int t = k.BitLength;
for (int i = 0; i < t; i++)
{
if (k.TestBit(i))
{
q = q.Add(p);
}
p = p.Twice();
}
return q;
}
}
}
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