init commit

output/Libraries/BouncyCastle.Crypto/Org/BouncyCastle/Asn1/Anssi/AnssiNamedCurves.cs

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+using System.Collections;
+using Org.BouncyCastle.Asn1.X9;
+using Org.BouncyCastle.Math;
+using Org.BouncyCastle.Math.EC;
+using Org.BouncyCastle.Utilities;
+using Org.BouncyCastle.Utilities.Collections;
+using Org.BouncyCastle.Utilities.Encoders;
+
+namespace Org.BouncyCastle.Asn1.Anssi;
+
+public class AnssiNamedCurves
+{
+	internal class Frp256v1Holder : X9ECParametersHolder
+	{
+		internal static readonly X9ECParametersHolder Instance = new Frp256v1Holder();
+
+		private Frp256v1Holder()
+		{
+		}
+
+		protected override X9ECParameters CreateParameters()
+		{
+			BigInteger q = FromHex("F1FD178C0B3AD58F10126DE8CE42435B3961ADBCABC8CA6DE8FCF353D86E9C03");
+			BigInteger a = FromHex("F1FD178C0B3AD58F10126DE8CE42435B3961ADBCABC8CA6DE8FCF353D86E9C00");
+			BigInteger b = FromHex("EE353FCA5428A9300D4ABA754A44C00FDFEC0C9AE4B1A1803075ED967B7BB73F");
+			byte[] seed = null;
+			BigInteger bigInteger = FromHex("F1FD178C0B3AD58F10126DE8CE42435B53DC67E140D2BF941FFDD459C6D655E1");
+			BigInteger one = BigInteger.One;
+			ECCurve eCCurve = ConfigureCurve(new FpCurve(q, a, b, bigInteger, one));
+			X9ECPoint g = new X9ECPoint(eCCurve, Hex.Decode("04B6B3D4C356C139EB31183D4749D423958C27D2DCAF98B70164C97A2DD98F5CFF6142E0F7C8B204911F9271F0F3ECEF8C2701C307E8E4C9E183115A1554062CFB"));
+			return new X9ECParameters(eCCurve, g, bigInteger, one, seed);
+		}
+	}
+
+	private static readonly IDictionary objIds;
+
+	private static readonly IDictionary curves;
+
+	private static readonly IDictionary names;
+
+	public static IEnumerable Names => new EnumerableProxy(names.Values);
+
+	private static ECCurve ConfigureCurve(ECCurve curve)
+	{
+		return curve;
+	}
+
+	private static BigInteger FromHex(string hex)
+	{
+		return new BigInteger(1, Hex.Decode(hex));
+	}
+
+	private static void DefineCurve(string name, DerObjectIdentifier oid, X9ECParametersHolder holder)
+	{
+		objIds.Add(Platform.ToUpperInvariant(name), oid);
+		names.Add(oid, name);
+		curves.Add(oid, holder);
+	}
+
+	static AnssiNamedCurves()
+	{
+		objIds = Platform.CreateHashtable();
+		curves = Platform.CreateHashtable();
+		names = Platform.CreateHashtable();
+		DefineCurve("FRP256v1", AnssiObjectIdentifiers.FRP256v1, Frp256v1Holder.Instance);
+	}
+
+	public static X9ECParameters GetByName(string name)
+	{
+		DerObjectIdentifier oid = GetOid(name);
+		if (oid != null)
+		{
+			return GetByOid(oid);
+		}
+		return null;
+	}
+
+	public static X9ECParameters GetByOid(DerObjectIdentifier oid)
+	{
+		return ((X9ECParametersHolder)curves[oid])?.Parameters;
+	}
+
+	public static DerObjectIdentifier GetOid(string name)
+	{
+		return (DerObjectIdentifier)objIds[Platform.ToUpperInvariant(name)];
+	}
+
+	public static string GetName(DerObjectIdentifier oid)
+	{
+		return (string)names[oid];
+	}
+}