public void NonAdjacentBitStringShouldHaveTheCorrectIntegerValue(string hex)
{
var bs = new BitString(hex);
var bigInt = bs.ToPositiveBigInteger();
var subject = new NonAdjacentBitString(bigInt);
BigInteger result = 0;
for (var i = subject.BitLength - 1; i >= 0; i--)
{
result += subject.Bits[i] * (BigInteger.One << i);
}
Assert.AreEqual(bigInt, result);
}
public void NonAdjacentBitStringsShouldNotHaveTwoValuesNextToEachOther(string hex)
{
var bs = new BitString(hex);
var bigInt = bs.ToPositiveBigInteger();
var subject = new NonAdjacentBitString(bigInt);
for (var i = 0; i < subject.BitLength - 1; i++)
{
// If the current bit is not 0, the next bit should not be -1 or 1
if (subject.Bits[i] != 0)
{
Assert.AreNotEqual(1, System.Math.Abs(subject.Bits[i + 1]), $"Adjacent bit found at {i}");
}
}
}
private EdPoint Multiply(ExtendedEdPoint startPoint, NonAdjacentBitString nafBs)
{
var point = new ExtendedEdPoint(0, 1, 0, 1);
var naBits = nafBs.Bits;
for (var i = naBits.Length - 1; i >= 0; i--)
{
point = Double(point);
if (naBits[i] == 1)
{
point = Add(point, startPoint);
}
else if (naBits[i] == -1)
{
point = Subtract(point, startPoint);
}
}
return(ExtendedToEdPoint(point));
}
private EccPoint Multiply(EccPoint startPoint, NonAdjacentBitString nafBs)
{
var point = new EccPoint("infinity");
var naBits = nafBs.Bits;
for (var i = naBits.Length - 1; i >= 0; i--)
{
point = Double(point);
if (naBits[i] == 1)
{
point = Add(point, startPoint);
}
else if (naBits[i] == -1)
{
point = Subtract(point, startPoint);
}
}
return(point);
}
