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using System;
using Org.BouncyCastle.Utilities.Encoders;
namespace Org.BouncyCastle.Math.EC.Custom.GM
{
internal class SM2P256V1Curve
: AbstractFpCurve
{
public static readonly BigInteger q = new BigInteger(1,
Hex.Decode("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFF"));
private const int SM2P256V1_DEFAULT_COORDS = COORD_JACOBIAN;
protected readonly SM2P256V1Point m_infinity;
public SM2P256V1Curve()
: base(q)
{
this.m_infinity = new SM2P256V1Point(this, null, null);
this.m_a = FromBigInteger(new BigInteger(1,
Hex.Decode("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF00000000FFFFFFFFFFFFFFFC")));
this.m_b = FromBigInteger(new BigInteger(1,
Hex.Decode("28E9FA9E9D9F5E344D5A9E4BCF6509A7F39789F515AB8F92DDBCBD414D940E93")));
this.m_order = new BigInteger(1, Hex.Decode("FFFFFFFEFFFFFFFFFFFFFFFFFFFFFFFF7203DF6B21C6052B53BBF40939D54123"));
this.m_cofactor = BigInteger.One;
this.m_coord = SM2P256V1_DEFAULT_COORDS;
}
protected override ECCurve CloneCurve()
{
return new SM2P256V1Curve();
}
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 SM2P256V1FieldElement(x);
}
protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, bool withCompression)
{
return new SM2P256V1Point(this, x, y, withCompression);
}
protected internal override ECPoint CreateRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs, bool withCompression)
{
return new SM2P256V1Point(this, x, y, zs, withCompression);
}
}
}
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