49 lines
1.2 KiB
C#
49 lines
1.2 KiB
C#
using Org.BouncyCastle.Utilities;
|
|
|
|
namespace Org.BouncyCastle.Math.Field;
|
|
|
|
internal class GenericPolynomialExtensionField : IPolynomialExtensionField, IExtensionField, IFiniteField
|
|
{
|
|
protected readonly IFiniteField subfield;
|
|
|
|
protected readonly IPolynomial minimalPolynomial;
|
|
|
|
public virtual BigInteger Characteristic => subfield.Characteristic;
|
|
|
|
public virtual int Dimension => subfield.Dimension * minimalPolynomial.Degree;
|
|
|
|
public virtual IFiniteField Subfield => subfield;
|
|
|
|
public virtual int Degree => minimalPolynomial.Degree;
|
|
|
|
public virtual IPolynomial MinimalPolynomial => minimalPolynomial;
|
|
|
|
internal GenericPolynomialExtensionField(IFiniteField subfield, IPolynomial polynomial)
|
|
{
|
|
this.subfield = subfield;
|
|
minimalPolynomial = polynomial;
|
|
}
|
|
|
|
public override bool Equals(object obj)
|
|
{
|
|
if (this == obj)
|
|
{
|
|
return true;
|
|
}
|
|
if (!(obj is GenericPolynomialExtensionField genericPolynomialExtensionField))
|
|
{
|
|
return false;
|
|
}
|
|
if (subfield.Equals(genericPolynomialExtensionField.subfield))
|
|
{
|
|
return minimalPolynomial.Equals(genericPolynomialExtensionField.minimalPolynomial);
|
|
}
|
|
return false;
|
|
}
|
|
|
|
public override int GetHashCode()
|
|
{
|
|
return subfield.GetHashCode() ^ Integers.RotateLeft(minimalPolynomial.GetHashCode(), 16);
|
|
}
|
|
}
|