init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Math/Field/GenericPolynomialExtensionField.cs

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+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);
+	}
+}