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using System;
using Org.BouncyCastle.Utilities.Encoders;
namespace Org.BouncyCastle.Math.EC.Custom.Sec
{
internal class SecP256K1Curve
: AbstractFpCurve
{
public static readonly BigInteger q = new BigInteger(1,
Hex.Decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F"));
private const int SECP256K1_DEFAULT_COORDS = COORD_JACOBIAN;
protected readonly SecP256K1Point m_infinity;
public SecP256K1Curve()
: base(q)
{
this.m_infinity = new SecP256K1Point(this, null, null);
this.m_a = FromBigInteger(BigInteger.Zero);
this.m_b = FromBigInteger(BigInteger.ValueOf(7));
this.m_order = new BigInteger(1, Hex.Decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141"));
this.m_cofactor = BigInteger.One;
this.m_coord = SECP256K1_DEFAULT_COORDS;
}
protected override ECCurve CloneCurve()
{
return new SecP256K1Curve();
}
public override bool SupportsCoordinateSystem(int coord)
{
switch (coord)
{
case COORD_JACOBIAN:
return true;
default:
return false;
}
}
public virtual BigInteger Q
{
get { return q; }
}
public override ECPoint Infinity
{
get { return m_infinity; }
}
public override int FieldSize
{
get { return q.BitLength; }
}
public override ECFieldElement FromBigInteger(BigInteger x)
{
return new SecP256K1FieldElement(x);
}
protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, bool withCompression)
{
return new SecP256K1Point(this, x, y, withCompression);
}
protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs, bool withCompression)
{
return new SecP256K1Point(this, x, y, zs, withCompression);
}
}
}
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