/**
* Returns the parameter <code>μ</code> of the elliptic curve.
* @return <code>μ</code> of the elliptic curve.
* @throws ArgumentException if the given ECCurve is not a
* Koblitz curve.
*/
internal virtual sbyte GetMu()
{
if (mu == 0)
{
lock (this) {
if (mu == 0)
{
mu = Tnaf.GetMu(this);
}
}
}
return(mu);
}
/**
* Returns the parameter <code>μ</code> of the elliptic curve.
* @return <code>μ</code> of the elliptic curve.
* @throws ArgumentException if the given ECCurve is not a
* Koblitz curve.
*/
internal sbyte GetMu()
{
if (_mu == 0)
{
lock (this)
{
if (_mu == 0)
{
_mu = Tnaf.GetMu(this);
}
}
}
return(_mu);
}
protected override ECPoint MultiplyPositive(ECPoint point, BigInteger k)
{
if (!(point is AbstractF2mPoint))
{
throw new ArgumentException("Only AbstractF2mPoint can be used in WTauNafMultiplier");
}
AbstractF2mPoint p = (AbstractF2mPoint)point;
AbstractF2mCurve curve = (AbstractF2mCurve)p.Curve;
int fieldSize = curve.FieldSize;
sbyte intValue = (sbyte)curve.A.ToBigInteger().IntValue;
sbyte mu = Tnaf.GetMu((int)intValue);
BigInteger[] si = curve.GetSi();
ZTauElement lambda = Tnaf.PartModReduction(k, fieldSize, intValue, si, mu, 10);
return(this.MultiplyWTnaf(p, lambda, curve.GetPreCompInfo(p, PRECOMP_NAME), intValue, mu));
}
protected override ECPoint MultiplyPositive(ECPoint point, BigInteger k)
{
//IL_000d: Unknown result type (might be due to invalid IL or missing references)
if (!(point is AbstractF2mPoint))
{
throw new ArgumentException("Only AbstractF2mPoint can be used in WTauNafMultiplier");
}
AbstractF2mPoint abstractF2mPoint = (AbstractF2mPoint)point;
AbstractF2mCurve abstractF2mCurve = (AbstractF2mCurve)abstractF2mPoint.Curve;
int fieldSize = abstractF2mCurve.FieldSize;
sbyte b = (sbyte)abstractF2mCurve.A.ToBigInteger().IntValue;
sbyte mu = Tnaf.GetMu(b);
BigInteger[] si = abstractF2mCurve.GetSi();
ZTauElement lambda = Tnaf.PartModReduction(k, fieldSize, b, si, mu, 10);
return(MultiplyWTnaf(abstractF2mPoint, lambda, abstractF2mCurve.GetPreCompInfo(abstractF2mPoint, PRECOMP_NAME), b, mu));
}
/**
* Multiplies a {@link NBitcoin.BouncyCastle.math.ec.AbstractF2mPoint AbstractF2mPoint}
* by
* <code>k</code>
* using the reduced
* <code>τ</code>
* -adic NAF (RTNAF)
* method.
* @param p The AbstractF2mPoint to multiply.
* @param k The integer by which to multiply
* <code>k</code>
* .
* @return
* <code>p</code>
* multiplied by
* <code>k</code>
* .
*/
protected override ECPoint MultiplyPositive(ECPoint point, BigInteger k)
{
if (!(point is AbstractF2mPoint))
{
throw new ArgumentException("Only AbstractF2mPoint can be used in WTauNafMultiplier");
}
var p = (AbstractF2mPoint)point;
var curve = (AbstractF2mCurve)p.Curve;
var m = curve.FieldSize;
var a = (sbyte)curve.A.ToBigInteger().IntValue;
var mu = Tnaf.GetMu(a);
var s = curve.GetSi();
var rho = Tnaf.PartModReduction(k, m, a, s, mu, 10);
return(MultiplyWTnaf(p, rho, curve.GetPreCompInfo(p, PRECOMP_NAME), a, mu));
}
/**
* Multiplies a {@link org.bouncycastle.math.ec.AbstractF2mPoint AbstractF2mPoint}
* by <code>k</code> using the reduced <code>τ</code>-adic NAF (RTNAF)
* method.
* @param p The AbstractF2mPoint to multiply.
* @param k The integer by which to multiply <code>k</code>.
* @return <code>p</code> multiplied by <code>k</code>.
*/
protected override ECPoint MultiplyPositive(ECPoint point, BigInteger k)
{
if (!(point is AbstractF2mPoint))
{
throw new ArgumentException("Only AbstractF2mPoint can be used in WTauNafMultiplier");
}
AbstractF2mPoint p = (AbstractF2mPoint)point;
AbstractF2mCurve curve = (AbstractF2mCurve)p.Curve;
int m = curve.FieldSize;
sbyte a = (sbyte)curve.A.ToBigInteger().IntValue;
sbyte mu = Tnaf.GetMu(a);
BigInteger[] s = curve.GetSi();
ZTauElement rho = Tnaf.PartModReduction(k, m, a, s, mu, (sbyte)10);
return(MultiplyWTnaf(p, rho, a, mu));
}