using System;
using System.Collections;
using System.Globalization;

using Org.BouncyCastle.Asn1;
using Org.BouncyCastle.Asn1.X9;
using Org.BouncyCastle.Math;
using Org.BouncyCastle.Math.EC;
using Org.BouncyCastle.Utilities.Collections;
using Org.BouncyCastle.Utilities.Encoders;

namespace Org.BouncyCastle.Asn1.Sec
{
	public sealed class SecNamedCurves
	{
		private SecNamedCurves()
		{
		}

		private static BigInteger FromHex(
			string hex)
		{
			return new BigInteger(1, Hex.Decode(hex));
		}

		/*
		 * secp112r1
		 */
		internal class Secp112r1Holder
			: X9ECParametersHolder
		{
			private Secp112r1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp112r1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = (2^128 - 3) / 76439
				BigInteger p = FromHex("DB7C2ABF62E35E668076BEAD208B");
				BigInteger a = FromHex("DB7C2ABF62E35E668076BEAD2088");
				BigInteger b = FromHex("659EF8BA043916EEDE8911702B22");
				byte[] S = Hex.Decode("00F50B028E4D696E676875615175290472783FB1");
				BigInteger n = FromHex("DB7C2ABF62E35E7628DFAC6561C5");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
				//+ "09487239995A5EE76B55F9C2F098"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "09487239995A5EE76B55F9C2F098"
					+ "A89CE5AF8724C0A23E0E0FF77500"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp112r2
		 */
		internal class Secp112r2Holder
			: X9ECParametersHolder
		{
			private Secp112r2Holder() {}

			internal static X9ECParametersHolder Instance = new Secp112r2Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = (2^128 - 3) / 76439
				BigInteger p = FromHex("DB7C2ABF62E35E668076BEAD208B");
				BigInteger a = FromHex("6127C24C05F38A0AAAF65C0EF02C");
				BigInteger b = FromHex("51DEF1815DB5ED74FCC34C85D709");
				byte[] S = Hex.Decode("002757A1114D696E6768756151755316C05E0BD4");
				BigInteger n = FromHex("36DF0AAFD8B8D7597CA10520D04B");
				BigInteger h = BigInteger.ValueOf(4);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "4BA30AB5E892B4E1649DD0928643"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "4BA30AB5E892B4E1649DD0928643"
					+ "ADCD46F5882E3747DEF36E956E97"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp128r1
		 */
		internal class Secp128r1Holder
			: X9ECParametersHolder
		{
			private Secp128r1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp128r1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^128 - 2^97 - 1
				BigInteger p = FromHex("FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF");
				BigInteger a = FromHex("FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFC");
				BigInteger b = FromHex("E87579C11079F43DD824993C2CEE5ED3");
				byte[] S = Hex.Decode("000E0D4D696E6768756151750CC03A4473D03679");
				BigInteger n = FromHex("FFFFFFFE0000000075A30D1B9038A115");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "161FF7528B899B2D0C28607CA52C5B86"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "161FF7528B899B2D0C28607CA52C5B86"
					+ "CF5AC8395BAFEB13C02DA292DDED7A83"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp128r2
		 */
		internal class Secp128r2Holder
			: X9ECParametersHolder
		{
			private Secp128r2Holder() {}

			internal static X9ECParametersHolder Instance = new Secp128r2Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^128 - 2^97 - 1
				BigInteger p = FromHex("FFFFFFFDFFFFFFFFFFFFFFFFFFFFFFFF");
				BigInteger a = FromHex("D6031998D1B3BBFEBF59CC9BBFF9AEE1");
				BigInteger b = FromHex("5EEEFCA380D02919DC2C6558BB6D8A5D");
				byte[] S = Hex.Decode("004D696E67687561517512D8F03431FCE63B88F4");
				BigInteger n = FromHex("3FFFFFFF7FFFFFFFBE0024720613B5A3");
				BigInteger h = BigInteger.ValueOf(4);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
				//+ "7B6AA5D85E572983E6FB32A7CDEBC140"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "7B6AA5D85E572983E6FB32A7CDEBC140"
					+ "27B6916A894D3AEE7106FE805FC34B44"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp160k1
		 */
		internal class Secp160k1Holder
			: X9ECParametersHolder
		{
			private Secp160k1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp160k1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^160 - 2^32 - 2^14 - 2^12 - 2^9 - 2^8 - 2^7 - 2^3 - 2^2 - 1
				BigInteger p = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73");
				BigInteger a = BigInteger.Zero;
				BigInteger b = BigInteger.ValueOf(7);
				byte[] S = null;
				BigInteger n = FromHex("0100000000000000000001B8FA16DFAB9ACA16B6B3");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
					//+ "3B4C382CE37AA192A4019E763036F4F5DD4D7EBB"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "3B4C382CE37AA192A4019E763036F4F5DD4D7EBB"
					+ "938CF935318FDCED6BC28286531733C3F03C4FEE"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp160r1
		 */
		internal class Secp160r1Holder
			: X9ECParametersHolder
		{
			private Secp160r1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp160r1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^160 - 2^31 - 1
				BigInteger p = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFF");
				BigInteger a = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF7FFFFFFC");
				BigInteger b = FromHex("1C97BEFC54BD7A8B65ACF89F81D4D4ADC565FA45");
				byte[] S = Hex.Decode("1053CDE42C14D696E67687561517533BF3F83345");
				BigInteger n = FromHex("0100000000000000000001F4C8F927AED3CA752257");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
					//+ "4A96B5688EF573284664698968C38BB913CBFC82"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "4A96B5688EF573284664698968C38BB913CBFC82"
					+ "23A628553168947D59DCC912042351377AC5FB32"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp160r2
		 */
		internal class Secp160r2Holder
			: X9ECParametersHolder
		{
			private Secp160r2Holder() {}

			internal static X9ECParametersHolder Instance = new Secp160r2Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^160 - 2^32 - 2^14 - 2^12 - 2^9 - 2^8 - 2^7 - 2^3 - 2^2 - 1
				BigInteger p = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73");
				BigInteger a = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC70");
				BigInteger b = FromHex("B4E134D3FB59EB8BAB57274904664D5AF50388BA");
				byte[] S = Hex.Decode("B99B99B099B323E02709A4D696E6768756151751");
				BigInteger n = FromHex("0100000000000000000000351EE786A818F3A1A16B");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
				//+ "52DCB034293A117E1F4FF11B30F7199D3144CE6D"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "52DCB034293A117E1F4FF11B30F7199D3144CE6D"
					+ "FEAFFEF2E331F296E071FA0DF9982CFEA7D43F2E"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp192k1
		 */
		internal class Secp192k1Holder
			: X9ECParametersHolder
		{
			private Secp192k1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp192k1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^192 - 2^32 - 2^12 - 2^8 - 2^7 - 2^6 - 2^3 - 1
				BigInteger p = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37");
				BigInteger a = BigInteger.Zero;
				BigInteger b = BigInteger.ValueOf(3);
				byte[] S = null;
				BigInteger n = FromHex("FFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D"
					+ "9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp192r1
		 */
		internal class Secp192r1Holder
			: X9ECParametersHolder
		{
			private Secp192r1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp192r1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^192 - 2^64 - 1
				BigInteger p = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFF");
				BigInteger a = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFC");
				BigInteger b = FromHex("64210519E59C80E70FA7E9AB72243049FEB8DEECC146B9B1");
				byte[] S = Hex.Decode("3045AE6FC8422F64ED579528D38120EAE12196D5");
				BigInteger n = FromHex("FFFFFFFFFFFFFFFFFFFFFFFF99DEF836146BC9B1B4D22831");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "188DA80EB03090F67CBF20EB43A18800F4FF0AFD82FF1012"
					+ "07192B95FFC8DA78631011ED6B24CDD573F977A11E794811"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp224k1
		 */
		internal class Secp224k1Holder
			: X9ECParametersHolder
		{
			private Secp224k1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp224k1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^224 - 2^32 - 2^12 - 2^11 - 2^9 - 2^7 - 2^4 - 2 - 1
				BigInteger p = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFE56D");
				BigInteger a = BigInteger.Zero;
				BigInteger b = BigInteger.ValueOf(5);
				byte[] S = null;
				BigInteger n = FromHex("010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "A1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "A1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C"
					+ "7E089FED7FBA344282CAFBD6F7E319F7C0B0BD59E2CA4BDB556D61A5"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp224r1
		 */
		internal class Secp224r1Holder
			: X9ECParametersHolder
		{
			private Secp224r1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp224r1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^224 - 2^96 + 1
				BigInteger p = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF000000000000000000000001");
				BigInteger a = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFE");
				BigInteger b = FromHex("B4050A850C04B3ABF54132565044B0B7D7BFD8BA270B39432355FFB4");
				byte[] S = Hex.Decode("BD71344799D5C7FCDC45B59FA3B9AB8F6A948BC5");
				BigInteger n = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFF16A2E0B8F03E13DD29455C5C2A3D");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
				//+ "B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "B70E0CBD6BB4BF7F321390B94A03C1D356C21122343280D6115C1D21"
					+ "BD376388B5F723FB4C22DFE6CD4375A05A07476444D5819985007E34"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp256k1
		 */
		internal class Secp256k1Holder
			: X9ECParametersHolder
		{
			private Secp256k1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp256k1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^256 - 2^32 - 2^9 - 2^8 - 2^7 - 2^6 - 2^4 - 1
				BigInteger p = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F");
				BigInteger a = BigInteger.Zero;
				BigInteger b = BigInteger.ValueOf(7);
				byte[] S = null;
				BigInteger n = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
				//+ "79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798"
					+ "483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp256r1
		 */
		internal class Secp256r1Holder
			: X9ECParametersHolder
		{
			private Secp256r1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp256r1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^224 (2^32 - 1) + 2^192 + 2^96 - 1
				BigInteger p = FromHex("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFF");
				BigInteger a = FromHex("FFFFFFFF00000001000000000000000000000000FFFFFFFFFFFFFFFFFFFFFFFC");
				BigInteger b = FromHex("5AC635D8AA3A93E7B3EBBD55769886BC651D06B0CC53B0F63BCE3C3E27D2604B");
				byte[] S = Hex.Decode("C49D360886E704936A6678E1139D26B7819F7E90");
				BigInteger n = FromHex("FFFFFFFF00000000FFFFFFFFFFFFFFFFBCE6FAADA7179E84F3B9CAC2FC632551");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "6B17D1F2E12C4247F8BCE6E563A440F277037D812DEB33A0F4A13945D898C296"
					+ "4FE342E2FE1A7F9B8EE7EB4A7C0F9E162BCE33576B315ECECBB6406837BF51F5"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp384r1
		 */
		internal class Secp384r1Holder
			: X9ECParametersHolder
		{
			private Secp384r1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp384r1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^384 - 2^128 - 2^96 + 2^32 - 1
				BigInteger p = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFF");
				BigInteger a = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFFFF0000000000000000FFFFFFFC");
				BigInteger b = FromHex("B3312FA7E23EE7E4988E056BE3F82D19181D9C6EFE8141120314088F5013875AC656398D8A2ED19D2A85C8EDD3EC2AEF");
				byte[] S = Hex.Decode("A335926AA319A27A1D00896A6773A4827ACDAC73");
				BigInteger n = FromHex("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC7634D81F4372DDF581A0DB248B0A77AECEC196ACCC52973");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB7"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "AA87CA22BE8B05378EB1C71EF320AD746E1D3B628BA79B9859F741E082542A385502F25DBF55296C3A545E3872760AB7"
					+ "3617DE4A96262C6F5D9E98BF9292DC29F8F41DBD289A147CE9DA3113B5F0B8C00A60B1CE1D7E819D7A431D7C90EA0E5F"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * secp521r1
		 */
		internal class Secp521r1Holder
			: X9ECParametersHolder
		{
			private Secp521r1Holder() {}

			internal static X9ECParametersHolder Instance = new Secp521r1Holder();

			protected override X9ECParameters CreateParameters()
			{
				// p = 2^521 - 1
				BigInteger p = FromHex("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF");
				BigInteger a = FromHex("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFC");
				BigInteger b = FromHex("0051953EB9618E1C9A1F929A21A0B68540EEA2DA725B99B315F3B8B489918EF109E156193951EC7E937B1652C0BD3BB1BF073573DF883D2C34F1EF451FD46B503F00");
				byte[] S = Hex.Decode("D09E8800291CB85396CC6717393284AAA0DA64BA");
				BigInteger n = FromHex("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFA51868783BF2F966B7FCC0148F709A5D03BB5C9B8899C47AEBB6FB71E91386409");
				BigInteger h = BigInteger.ValueOf(1);

				ECCurve curve = new FpCurve(p, a, b);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
				//+ "00C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "00C6858E06B70404E9CD9E3ECB662395B4429C648139053FB521F828AF606B4D3DBAA14B5E77EFE75928FE1DC127A2FFA8DE3348B3C1856A429BF97E7E31C2E5BD66"
					+ "011839296A789A3BC0045C8A5FB42C7D1BD998F54449579B446817AFBD17273E662C97EE72995EF42640C550B9013FAD0761353C7086A272C24088BE94769FD16650"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect113r1
		 */
		internal class Sect113r1Holder
			: X9ECParametersHolder
		{
			private Sect113r1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect113r1Holder();

			private const int m = 113;
			private const int k = 9;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = FromHex("003088250CA6E7C7FE649CE85820F7");
				BigInteger b = FromHex("00E8BEE4D3E2260744188BE0E9C723");
				byte[] S = Hex.Decode("10E723AB14D696E6768756151756FEBF8FCB49A9");
				BigInteger n = FromHex("0100000000000000D9CCEC8A39E56F");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "009D73616F35F4AB1407D73562C10F"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "009D73616F35F4AB1407D73562C10F"
					+ "00A52830277958EE84D1315ED31886"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect113r2
		 */
		internal class Sect113r2Holder
			: X9ECParametersHolder
		{
			private Sect113r2Holder() {}

			internal static X9ECParametersHolder Instance = new Sect113r2Holder();

			private const int m = 113;
			private const int k = 9;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = FromHex("00689918DBEC7E5A0DD6DFC0AA55C7");
				BigInteger b = FromHex("0095E9A9EC9B297BD4BF36E059184F");
				byte[] S = Hex.Decode("10C0FB15760860DEF1EEF4D696E676875615175D");
				BigInteger n = FromHex("010000000000000108789B2496AF93");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "01A57A6A7B26CA5EF52FCDB8164797"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "01A57A6A7B26CA5EF52FCDB8164797"
					+ "00B3ADC94ED1FE674C06E695BABA1D"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect131r1
		 */
		internal class Sect131r1Holder
			: X9ECParametersHolder
		{
			private Sect131r1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect131r1Holder();

			private const int m = 131;
			private const int k1 = 2;
			private const int k2 = 3;
			private const int k3 = 8;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = FromHex("07A11B09A76B562144418FF3FF8C2570B8");
				BigInteger b = FromHex("0217C05610884B63B9C6C7291678F9D341");
				byte[] S = Hex.Decode("4D696E676875615175985BD3ADBADA21B43A97E2");
				BigInteger n = FromHex("0400000000000000023123953A9464B54D");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k1, k2, k3, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "0081BAF91FDF9833C40F9C181343638399"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "0081BAF91FDF9833C40F9C181343638399"
					+ "078C6E7EA38C001F73C8134B1B4EF9E150"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect131r2
		 */
		internal class Sect131r2Holder
			: X9ECParametersHolder
		{
			private Sect131r2Holder() {}

			internal static X9ECParametersHolder Instance = new Sect131r2Holder();

			private const int m = 131;
			private const int k1 = 2;
			private const int k2 = 3;
			private const int k3 = 8;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = FromHex("03E5A88919D7CAFCBF415F07C2176573B2");
				BigInteger b = FromHex("04B8266A46C55657AC734CE38F018F2192");
				byte[] S = Hex.Decode("985BD3ADBAD4D696E676875615175A21B43A97E3");
				BigInteger n = FromHex("0400000000000000016954A233049BA98F");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k1, k2, k3, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "0356DCD8F2F95031AD652D23951BB366A8"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "0356DCD8F2F95031AD652D23951BB366A8"
					+ "0648F06D867940A5366D9E265DE9EB240F"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect163k1
		 */
		internal class Sect163k1Holder
			: X9ECParametersHolder
		{
			private Sect163k1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect163k1Holder();

			private const int m = 163;
			private const int k1 = 3;
			private const int k2 = 6;
			private const int k3 = 7;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.ValueOf(1);
				BigInteger b = BigInteger.ValueOf(1);
				byte[] S = null;
				BigInteger n = FromHex("04000000000000000000020108A2E0CC0D99F8A5EF");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k1, k2, k3, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "02FE13C0537BBC11ACAA07D793DE4E6D5E5C94EEE8"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "02FE13C0537BBC11ACAA07D793DE4E6D5E5C94EEE8"
					+ "0289070FB05D38FF58321F2E800536D538CCDAA3D9"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect163r1
		 */
		internal class Sect163r1Holder
			: X9ECParametersHolder
		{
			private Sect163r1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect163r1Holder();

			private const int m = 163;
			private const int k1 = 3;
			private const int k2 = 6;
			private const int k3 = 7;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = FromHex("07B6882CAAEFA84F9554FF8428BD88E246D2782AE2");
				BigInteger b = FromHex("0713612DCDDCB40AAB946BDA29CA91F73AF958AFD9");
				byte[] S = Hex.Decode("24B7B137C8A14D696E6768756151756FD0DA2E5C");
				BigInteger n = FromHex("03FFFFFFFFFFFFFFFFFFFF48AAB689C29CA710279B");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k1, k2, k3, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "0369979697AB43897789566789567F787A7876A654"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "0369979697AB43897789566789567F787A7876A654"
					+ "00435EDB42EFAFB2989D51FEFCE3C80988F41FF883"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect163r2
		 */
		internal class Sect163r2Holder
			: X9ECParametersHolder
		{
			private Sect163r2Holder() {}

			internal static X9ECParametersHolder Instance = new Sect163r2Holder();

			private const int m = 163;
			private const int k1 = 3;
			private const int k2 = 6;
			private const int k3 = 7;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.ValueOf(1);
				BigInteger b = FromHex("020A601907B8C953CA1481EB10512F78744A3205FD");
				byte[] S = Hex.Decode("85E25BFE5C86226CDB12016F7553F9D0E693A268");
				BigInteger n = FromHex("040000000000000000000292FE77E70C12A4234C33");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k1, k2, k3, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "03F0EBA16286A2D57EA0991168D4994637E8343E36"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "03F0EBA16286A2D57EA0991168D4994637E8343E36"
					+ "00D51FBC6C71A0094FA2CDD545B11C5C0C797324F1"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect193r1
		 */
		internal class Sect193r1Holder
			: X9ECParametersHolder
		{
			private Sect193r1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect193r1Holder();

			private const int m = 193;
			private const int k = 15;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = FromHex("0017858FEB7A98975169E171F77B4087DE098AC8A911DF7B01");
				BigInteger b = FromHex("00FDFB49BFE6C3A89FACADAA7A1E5BBC7CC1C2E5D831478814");
				byte[] S = Hex.Decode("103FAEC74D696E676875615175777FC5B191EF30");
				BigInteger n = FromHex("01000000000000000000000000C7F34A778F443ACC920EBA49");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "01F481BC5F0FF84A74AD6CDF6FDEF4BF6179625372D8C0C5E1"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "01F481BC5F0FF84A74AD6CDF6FDEF4BF6179625372D8C0C5E1"
					+ "0025E399F2903712CCF3EA9E3A1AD17FB0B3201B6AF7CE1B05"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect193r2
		 */
		internal class Sect193r2Holder
			: X9ECParametersHolder
		{
			private Sect193r2Holder() {}

			internal static X9ECParametersHolder Instance = new Sect193r2Holder();

			private const int m = 193;
			private const int k = 15;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = FromHex("0163F35A5137C2CE3EA6ED8667190B0BC43ECD69977702709B");
				BigInteger b = FromHex("00C9BB9E8927D4D64C377E2AB2856A5B16E3EFB7F61D4316AE");
				byte[] S = Hex.Decode("10B7B4D696E676875615175137C8A16FD0DA2211");
				BigInteger n = FromHex("010000000000000000000000015AAB561B005413CCD4EE99D5");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "00D9B67D192E0367C803F39E1A7E82CA14A651350AAE617E8F"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "00D9B67D192E0367C803F39E1A7E82CA14A651350AAE617E8F"
					+ "01CE94335607C304AC29E7DEFBD9CA01F596F927224CDECF6C"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect233k1
		 */
		internal class Sect233k1Holder
			: X9ECParametersHolder
		{
			private Sect233k1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect233k1Holder();

			private const int m = 233;
			private const int k = 74;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.Zero;
				BigInteger b = BigInteger.ValueOf(1);
				byte[] S = null;
				BigInteger n = FromHex("8000000000000000000000000000069D5BB915BCD46EFB1AD5F173ABDF");
				BigInteger h = BigInteger.ValueOf(4);

				ECCurve curve = new F2mCurve(m, k, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
				//+ "017232BA853A7E731AF129F22FF4149563A419C26BF50A4C9D6EEFAD6126"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "017232BA853A7E731AF129F22FF4149563A419C26BF50A4C9D6EEFAD6126"
					+ "01DB537DECE819B7F70F555A67C427A8CD9BF18AEB9B56E0C11056FAE6A3"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect233r1
		 */
		internal class Sect233r1Holder
			: X9ECParametersHolder
		{
			private Sect233r1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect233r1Holder();

			private const int m = 233;
			private const int k = 74;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.ValueOf(1);
				BigInteger b = FromHex("0066647EDE6C332C7F8C0923BB58213B333B20E9CE4281FE115F7D8F90AD");
				byte[] S = Hex.Decode("74D59FF07F6B413D0EA14B344B20A2DB049B50C3");
				BigInteger n = FromHex("01000000000000000000000000000013E974E72F8A6922031D2603CFE0D7");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "00FAC9DFCBAC8313BB2139F1BB755FEF65BC391F8B36F8F8EB7371FD558B"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "00FAC9DFCBAC8313BB2139F1BB755FEF65BC391F8B36F8F8EB7371FD558B"
					+ "01006A08A41903350678E58528BEBF8A0BEFF867A7CA36716F7E01F81052"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect239k1
		 */
		internal class Sect239k1Holder
			: X9ECParametersHolder
		{
			private Sect239k1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect239k1Holder();

			private const int m = 239;
			private const int k = 158;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.Zero;
				BigInteger b = BigInteger.ValueOf(1);
				byte[] S = null;
				BigInteger n = FromHex("2000000000000000000000000000005A79FEC67CB6E91F1C1DA800E478A5");
				BigInteger h = BigInteger.ValueOf(4);

				ECCurve curve = new F2mCurve(m, k, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "29A0B6A887A983E9730988A68727A8B2D126C44CC2CC7B2A6555193035DC"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "29A0B6A887A983E9730988A68727A8B2D126C44CC2CC7B2A6555193035DC"
					+ "76310804F12E549BDB011C103089E73510ACB275FC312A5DC6B76553F0CA"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect283k1
		 */
		internal class Sect283k1Holder
			: X9ECParametersHolder
		{
			private Sect283k1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect283k1Holder();

			private const int m = 283;
			private const int k1 = 5;
			private const int k2 = 7;
			private const int k3 = 12;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.Zero;
				BigInteger b = BigInteger.ValueOf(1);
				byte[] S = null;
				BigInteger n = FromHex("01FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE9AE2ED07577265DFF7F94451E061E163C61");
				BigInteger h = BigInteger.ValueOf(4);

				ECCurve curve = new F2mCurve(m, k1, k2, k3, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
				//+ "0503213F78CA44883F1A3B8162F188E553CD265F23C1567A16876913B0C2AC2458492836"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "0503213F78CA44883F1A3B8162F188E553CD265F23C1567A16876913B0C2AC2458492836"
					+ "01CCDA380F1C9E318D90F95D07E5426FE87E45C0E8184698E45962364E34116177DD2259"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect283r1
		 */
		internal class Sect283r1Holder
			: X9ECParametersHolder
		{
			private Sect283r1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect283r1Holder();

			private const int m = 283;
			private const int k1 = 5;
			private const int k2 = 7;
			private const int k3 = 12;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.ValueOf(1);
				BigInteger b = FromHex("027B680AC8B8596DA5A4AF8A19A0303FCA97FD7645309FA2A581485AF6263E313B79A2F5");
				byte[] S = Hex.Decode("77E2B07370EB0F832A6DD5B62DFC88CD06BB84BE");
				BigInteger n = FromHex("03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEF90399660FC938A90165B042A7CEFADB307");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k1, k2, k3, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "05F939258DB7DD90E1934F8C70B0DFEC2EED25B8557EAC9C80E2E198F8CDBECD86B12053"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "05F939258DB7DD90E1934F8C70B0DFEC2EED25B8557EAC9C80E2E198F8CDBECD86B12053"
					+ "03676854FE24141CB98FE6D4B20D02B4516FF702350EDDB0826779C813F0DF45BE8112F4"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect409k1
		 */
		internal class Sect409k1Holder
			: X9ECParametersHolder
		{
			private Sect409k1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect409k1Holder();

			private const int m = 409;
			private const int k = 87;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.Zero;
				BigInteger b = BigInteger.ValueOf(1);
				byte[] S = null;
				BigInteger n = FromHex("7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE5F83B2D4EA20400EC4557D5ED3E3E7CA5B4B5C83B8E01E5FCF");
				BigInteger h = BigInteger.ValueOf(4);

				ECCurve curve = new F2mCurve(m, k, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "0060F05F658F49C1AD3AB1890F7184210EFD0987E307C84C27ACCFB8F9F67CC2C460189EB5AAAA62EE222EB1B35540CFE9023746"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "0060F05F658F49C1AD3AB1890F7184210EFD0987E307C84C27ACCFB8F9F67CC2C460189EB5AAAA62EE222EB1B35540CFE9023746"
					+ "01E369050B7C4E42ACBA1DACBF04299C3460782F918EA427E6325165E9EA10E3DA5F6C42E9C55215AA9CA27A5863EC48D8E0286B"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect409r1
		 */
		internal class Sect409r1Holder
			: X9ECParametersHolder
		{
			private Sect409r1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect409r1Holder();

			private const int m = 409;
			private const int k = 87;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.ValueOf(1);
				BigInteger b = FromHex("0021A5C2C8EE9FEB5C4B9A753B7B476B7FD6422EF1F3DD674761FA99D6AC27C8A9A197B272822F6CD57A55AA4F50AE317B13545F");
				byte[] S = Hex.Decode("4099B5A457F9D69F79213D094C4BCD4D4262210B");
				BigInteger n = FromHex("010000000000000000000000000000000000000000000000000001E2AAD6A612F33307BE5FA47C3C9E052F838164CD37D9A21173");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "015D4860D088DDB3496B0C6064756260441CDE4AF1771D4DB01FFE5B34E59703DC255A868A1180515603AEAB60794E54BB7996A7"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "015D4860D088DDB3496B0C6064756260441CDE4AF1771D4DB01FFE5B34E59703DC255A868A1180515603AEAB60794E54BB7996A7"
					+ "0061B1CFAB6BE5F32BBFA78324ED106A7636B9C5A7BD198D0158AA4F5488D08F38514F1FDF4B4F40D2181B3681C364BA0273C706"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect571k1
		 */
		internal class Sect571k1Holder
			: X9ECParametersHolder
		{
			private Sect571k1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect571k1Holder();

			private const int m = 571;
			private const int k1 = 2;
			private const int k2 = 5;
			private const int k3 = 10;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.Zero;
				BigInteger b = BigInteger.ValueOf(1);
				byte[] S = null;
				BigInteger n = FromHex("020000000000000000000000000000000000000000000000000000000000000000000000131850E1F19A63E4B391A8DB917F4138B630D84BE5D639381E91DEB45CFE778F637C1001");
				BigInteger h = BigInteger.ValueOf(4);

				ECCurve curve = new F2mCurve(m, k1, k2, k3, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("02"
				//+ "026EB7A859923FBC82189631F8103FE4AC9CA2970012D5D46024804801841CA44370958493B205E647DA304DB4CEB08CBBD1BA39494776FB988B47174DCA88C7E2945283A01C8972"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "026EB7A859923FBC82189631F8103FE4AC9CA2970012D5D46024804801841CA44370958493B205E647DA304DB4CEB08CBBD1BA39494776FB988B47174DCA88C7E2945283A01C8972"
					+ "0349DC807F4FBF374F4AEADE3BCA95314DD58CEC9F307A54FFC61EFC006D8A2C9D4979C0AC44AEA74FBEBBB9F772AEDCB620B01A7BA7AF1B320430C8591984F601CD4C143EF1C7A3"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}

		/*
		 * sect571r1
		 */
		internal class Sect571r1Holder
			: X9ECParametersHolder
		{
			private Sect571r1Holder() {}

			internal static X9ECParametersHolder Instance = new Sect571r1Holder();

			private const int m = 571;
			private const int k1 = 2;
			private const int k2 = 5;
			private const int k3 = 10;

			protected override X9ECParameters CreateParameters()
			{
				BigInteger a = BigInteger.ValueOf(1);
				BigInteger b = FromHex("02F40E7E2221F295DE297117B7F3D62F5C6A97FFCB8CEFF1CD6BA8CE4A9A18AD84FFABBD8EFA59332BE7AD6756A66E294AFD185A78FF12AA520E4DE739BACA0C7FFEFF7F2955727A");
				byte[] S = Hex.Decode("2AA058F73A0E33AB486B0F610410C53A7F132310");
				BigInteger n = FromHex("03FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFE661CE18FF55987308059B186823851EC7DD9CA1161DE93D5174D66E8382E9BB2FE84E47");
				BigInteger h = BigInteger.ValueOf(2);

				ECCurve curve = new F2mCurve(m, k1, k2, k3, a, b, n, h);
				//ECPoint G = curve.DecodePoint(Hex.Decode("03"
				//+ "0303001D34B856296C16C0D40D3CD7750A93D1D2955FA80AA5F40FC8DB7B2ABDBDE53950F4C0D293CDD711A35B67FB1499AE60038614F1394ABFA3B4C850D927E1E7769C8EEC2D19"));
				ECPoint G = curve.DecodePoint(Hex.Decode("04"
					+ "0303001D34B856296C16C0D40D3CD7750A93D1D2955FA80AA5F40FC8DB7B2ABDBDE53950F4C0D293CDD711A35B67FB1499AE60038614F1394ABFA3B4C850D927E1E7769C8EEC2D19"
					+ "037BF27342DA639B6DCCFFFEB73D69D78C6C27A6009CBBCA1980F8533921E8A684423E43BAB08A576291AF8F461BB2A8B3531D2F0485C19B16E2F1516E23DD3C1A4827AF1B8AC15B"));

				return new X9ECParameters(curve, G, n, h, S);
			}
		}


		private static readonly Hashtable objIds = new Hashtable();
		private static readonly Hashtable curves = new Hashtable();
		private static readonly Hashtable names = new Hashtable();

		private static void DefineCurve(
			string					name,
			DerObjectIdentifier		oid,
			X9ECParametersHolder	holder)
		{
			objIds.Add(name, oid);
			names.Add(oid, name);
			curves.Add(oid, holder);
		}

		static SecNamedCurves()
		{
			DefineCurve("secp112r1", SecObjectIdentifiers.SecP112r1, Secp112r1Holder.Instance);
			DefineCurve("secp112r2", SecObjectIdentifiers.SecP112r2, Secp112r2Holder.Instance);
			DefineCurve("secp128r1", SecObjectIdentifiers.SecP128r1, Secp128r1Holder.Instance);
			DefineCurve("secp128r2", SecObjectIdentifiers.SecP128r2, Secp128r2Holder.Instance);
			DefineCurve("secp160k1", SecObjectIdentifiers.SecP160k1, Secp160k1Holder.Instance);
			DefineCurve("secp160r1", SecObjectIdentifiers.SecP160r1, Secp160r1Holder.Instance);
			DefineCurve("secp160r2", SecObjectIdentifiers.SecP160r2, Secp160r2Holder.Instance);
			DefineCurve("secp192k1", SecObjectIdentifiers.SecP192k1, Secp192k1Holder.Instance);
			DefineCurve("secp192r1", SecObjectIdentifiers.SecP192r1, Secp192r1Holder.Instance);
			DefineCurve("secp224k1", SecObjectIdentifiers.SecP224k1, Secp224k1Holder.Instance); 
			DefineCurve("secp224r1", SecObjectIdentifiers.SecP224r1, Secp224r1Holder.Instance); 
			DefineCurve("secp256k1", SecObjectIdentifiers.SecP256k1, Secp256k1Holder.Instance); 
			DefineCurve("secp256r1", SecObjectIdentifiers.SecP256r1, Secp256r1Holder.Instance); 
			DefineCurve("secp384r1", SecObjectIdentifiers.SecP384r1, Secp384r1Holder.Instance); 
			DefineCurve("secp521r1", SecObjectIdentifiers.SecP521r1, Secp521r1Holder.Instance); 

			DefineCurve("sect113r1", SecObjectIdentifiers.SecT113r1, Sect113r1Holder.Instance); 
			DefineCurve("sect113r2", SecObjectIdentifiers.SecT113r2, Sect113r2Holder.Instance); 
			DefineCurve("sect131r1", SecObjectIdentifiers.SecT131r1, Sect131r1Holder.Instance); 
			DefineCurve("sect131r2", SecObjectIdentifiers.SecT131r2, Sect131r2Holder.Instance); 
			DefineCurve("sect163k1", SecObjectIdentifiers.SecT163k1, Sect163k1Holder.Instance); 
			DefineCurve("sect163r1", SecObjectIdentifiers.SecT163r1, Sect163r1Holder.Instance); 
			DefineCurve("sect163r2", SecObjectIdentifiers.SecT163r2, Sect163r2Holder.Instance); 
			DefineCurve("sect193r1", SecObjectIdentifiers.SecT193r1, Sect193r1Holder.Instance); 
			DefineCurve("sect193r2", SecObjectIdentifiers.SecT193r2, Sect193r2Holder.Instance); 
			DefineCurve("sect233k1", SecObjectIdentifiers.SecT233k1, Sect233k1Holder.Instance); 
			DefineCurve("sect233r1", SecObjectIdentifiers.SecT233r1, Sect233r1Holder.Instance); 
			DefineCurve("sect239k1", SecObjectIdentifiers.SecT239k1, Sect239k1Holder.Instance); 
			DefineCurve("sect283k1", SecObjectIdentifiers.SecT283k1, Sect283k1Holder.Instance); 
			DefineCurve("sect283r1", SecObjectIdentifiers.SecT283r1, Sect283r1Holder.Instance); 
			DefineCurve("sect409k1", SecObjectIdentifiers.SecT409k1, Sect409k1Holder.Instance); 
			DefineCurve("sect409r1", SecObjectIdentifiers.SecT409r1, Sect409r1Holder.Instance); 
			DefineCurve("sect571k1", SecObjectIdentifiers.SecT571k1, Sect571k1Holder.Instance); 
			DefineCurve("sect571r1", SecObjectIdentifiers.SecT571r1, Sect571r1Holder.Instance); 
		}

		public static X9ECParameters GetByName(
			string name)
		{
			DerObjectIdentifier oid = (DerObjectIdentifier)
				objIds[name.ToLower(CultureInfo.InvariantCulture)];

			return oid == null ? null : GetByOid(oid);
		}

		/**
		 * return the X9ECParameters object for the named curve represented by
		 * the passed in object identifier. Null if the curve isn't present.
		 *
		 * @param oid an object identifier representing a named curve, if present.
		 */
		public static X9ECParameters GetByOid(
			DerObjectIdentifier oid)
		{
			X9ECParametersHolder holder = (X9ECParametersHolder) curves[oid];

			return holder == null ? null : holder.Parameters;
		}

		/**
		 * return the object identifier signified by the passed in name. Null
		 * if there is no object identifier associated with name.
		 *
		 * @return the object identifier associated with name, if present.
		 */
		public static DerObjectIdentifier GetOid(
			string name)
		{
			return (DerObjectIdentifier) objIds[name.ToLower(CultureInfo.InvariantCulture)];
		}

		/**
		 * return the named curve name represented by the given object identifier.
		 */
		public static string GetName(
			DerObjectIdentifier oid)
		{
			return (string) names[oid];
		}

		/**
		 * returns an enumeration containing the name strings for curves
		 * contained in this structure.
		 */
		public static IEnumerable Names
		{
			get { return new EnumerableProxy(objIds.Keys); }
		}
	}
}
