using Renci.SshNet.Security.Org.BouncyCastle.Utilities; namespace Renci.SshNet.Security.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; GenericPolynomialExtensionField genericPolynomialExtensionField = obj as GenericPolynomialExtensionField; if (genericPolynomialExtensionField == null) 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); } } }