using System; using Org.BouncyCastle.Utilities.Encoders; namespace Org.BouncyCastle.Math.EC.Custom.Sec { internal class SecT409R1Curve : AbstractF2mCurve { private const int SecT409R1_DEFAULT_COORDS = COORD_LAMBDA_PROJECTIVE; protected readonly SecT409R1Point m_infinity; public SecT409R1Curve() : base(409, 87, 0, 0) { this.m_infinity = new SecT409R1Point(this, null, null); this.m_a = FromBigInteger(BigInteger.One); this.m_b = FromBigInteger(new BigInteger(1, Hex.Decode("0021A5C2C8EE9FEB5C4B9A753B7B476B7FD6422EF1F3DD674761FA99D6AC27C8A9A197B272822F6CD57A55AA4F50AE317B13545F"))); this.m_order = new BigInteger(1, Hex.Decode("010000000000000000000000000000000000000000000000000001E2AAD6A612F33307BE5FA47C3C9E052F838164CD37D9A21173")); this.m_cofactor = BigInteger.Two; this.m_coord = SecT409R1_DEFAULT_COORDS; } protected override ECCurve CloneCurve() { return new SecT409R1Curve(); } public override bool SupportsCoordinateSystem(int coord) { switch (coord) { case COORD_LAMBDA_PROJECTIVE: return true; default: return false; } } public override ECPoint Infinity { get { return m_infinity; } } public override int FieldSize { get { return 409; } } public override ECFieldElement FromBigInteger(BigInteger x) { return new SecT409FieldElement(x); } protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, bool withCompression) { return new SecT409R1Point(this, x, y, withCompression); } protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs, bool withCompression) { return new SecT409R1Point(this, x, y, zs, withCompression); } public override bool IsKoblitz { get { return false; } } public virtual int M { get { return 409; } } public virtual bool IsTrinomial { get { return true; } } public virtual int K1 { get { return 87; } } public virtual int K2 { get { return 0; } } public virtual int K3 { get { return 0; } } } }