public static bool IsCrcValid(BinaryPolynomial polynomialForCheck)
{
var polynomial = polynomialForCheck.Copy();
var divisionResult = BinaryPolynomial.Division(polynomial, GeneratorPolynomial);
return(divisionResult.Item2.IsNullPolynomial);
}
public static BinaryPolynomial GenerateCrc(BinaryPolynomial polynomial)
{
var polynomialWithPaddingShift = polynomial.Copy().RiseDegree(Padding);
var divisionResult = BinaryPolynomial.Division(polynomialWithPaddingShift, GeneratorPolynomial);
return(polynomialWithPaddingShift + divisionResult.Item2);
}
public byte Multiply(byte firstNumber, byte secondNumber)
{
BinaryPolynomial firstNumberPolynomial = firstNumber;
BinaryPolynomial secondNumberPolynomial = secondNumber;
var multiplicationResult = firstNumberPolynomial * secondNumberPolynomial;
var multiplicationByModule = multiplicationResult % IrreduciblePolynomial;
return(multiplicationByModule);
}
public void DivisionShouldWorkCorrect(uint originalNumber, uint originalDivision,
uint expectedResult)
{
//arrange
BinaryPolynomial number = originalNumber;
BinaryPolynomial division = originalDivision;
//act
var actualResult = number / division;
//assert
Assert.Equal(expectedResult, actualResult.Value);
}
public byte Divide(byte firstNumber, byte secondNumber)
{
BinaryPolynomial firstNumberPolynomial = firstNumber;
BinaryPolynomial secondNumberPolynomial = secondNumber;
BinaryPolynomial secondNumberPolynomialInverse =
MultiplicativeInverseUsingExponentiation(secondNumberPolynomial);
var multiplicationResult = firstNumberPolynomial * secondNumberPolynomialInverse;
var multiplicationByModule = multiplicationResult % IrreduciblePolynomial;
return(multiplicationByModule);
}
public void MultiplicationShouldWorkCorrect(uint originalFirstNumber, uint originalSecondNumber,
uint expectedResult, string expectedPolynomial)
{
//arrange
BinaryPolynomial firstNumber = originalFirstNumber;
BinaryPolynomial secondNumber = originalSecondNumber;
//act
var actualResult = firstNumber * secondNumber;
//assert
Assert.Equal(expectedResult, actualResult.Value);
Assert.Equal(expectedPolynomial, actualResult.ToString());
}
