private List<string> CalculateECCWords(string bitString, ECCInfo eccInfo)
{
var eccWords = eccInfo.ECCPerBlock;
var messagePolynom = this.CalculateMessagePolynom(bitString);
var generatorPolynom = this.CalculateGeneratorPolynom(eccWords);
for (var i = 0; i < messagePolynom.PolyItems.Count; i++)
messagePolynom.PolyItems[i] = new PolynomItem(messagePolynom.PolyItems[i].Coefficient,
messagePolynom.PolyItems[i].Exponent + eccWords);
for (var i = 0; i < generatorPolynom.PolyItems.Count; i++)
generatorPolynom.PolyItems[i] = new PolynomItem(generatorPolynom.PolyItems[i].Coefficient,
generatorPolynom.PolyItems[i].Exponent + (messagePolynom.PolyItems.Count-1));
var leadTermSource = messagePolynom;
for (var i = 0; i < messagePolynom.PolyItems.Count || (leadTermSource.PolyItems.Count > 0 && leadTermSource.PolyItems[leadTermSource.PolyItems.Count-1].Exponent > 0); i++)
{
if (leadTermSource.PolyItems[0].Coefficient == 0)
{
leadTermSource.PolyItems.RemoveAt(0);
}
else
{
var resPoly = this.MultiplyGeneratorPolynomByLeadterm(generatorPolynom, this.ConvertToAlphaNotation(leadTermSource).PolyItems[0], i);
resPoly = this.ConvertToDecNotation(resPoly);
resPoly = this.XORPolynoms(leadTermSource, resPoly);
leadTermSource = resPoly;
}
}
return leadTermSource.PolyItems.Select(x => DecToBin(x.Coefficient, 8)).ToList();
}
private List<string> CalculateEccWords(string bitString, ECCInfo eccInfo)
{
var eccWords = eccInfo.ECCPerBlock;
var messagePolynom = CalculateMessagePolynom(bitString);
var generatorPolynom = CalculateGeneratorPolynom(eccWords);
for (var i = 0; i < messagePolynom.PolyItems.Count; i++)
messagePolynom.PolyItems[i] = new PolynomItem()
{
Coefficient = messagePolynom.PolyItems[i].Coefficient,
Exponent = messagePolynom.PolyItems[i].Exponent + eccWords
};
var genLeadtermFactor = messagePolynom.PolyItems[0].Exponent - generatorPolynom.PolyItems[0].Exponent;
for (var i = 0; i < generatorPolynom.PolyItems.Count; i++)
generatorPolynom.PolyItems[i] = new PolynomItem()
{
Coefficient = generatorPolynom.PolyItems[i].Coefficient,
Exponent = generatorPolynom.PolyItems[i].Exponent + genLeadtermFactor
};
var leadTermSource = messagePolynom;
for (var i = 0; i < messagePolynom.PolyItems.Count; i++)
{
if (leadTermSource.PolyItems[0].Coefficient == 0)
{ // First coefficient is already 0, simply remove it and continue
leadTermSource.PolyItems.RemoveAt(0);
}
else
{
var resPoly = MultiplyGeneratorPolynomByLeadterm(generatorPolynom, ConvertToAlphaNotation(leadTermSource).PolyItems[0], i);
resPoly = ConvertToDecNotation(resPoly);
resPoly = XorPolynoms(leadTermSource, resPoly);
leadTermSource = resPoly;
}
}
return leadTermSource.PolyItems.Select(x => DecToBin(x.Coefficient, 8)).ToList();
}
