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package org.bouncycastle.math.ec.custom.djb;
import java.math.BigInteger;
import org.bouncycastle.math.ec.ECCurve;
import org.bouncycastle.math.ec.ECFieldElement;
import org.bouncycastle.math.ec.ECPoint;
import org.bouncycastle.math.raw.Nat256;
import org.bouncycastle.util.encoders.Hex;
public class Curve25519 extends ECCurve.AbstractFp
{
public static final BigInteger q = Nat256.toBigInteger(Curve25519Field.P);
private static final int Curve25519_DEFAULT_COORDS = COORD_JACOBIAN_MODIFIED;
protected Curve25519Point infinity;
public Curve25519()
{
super(q);
this.infinity = new Curve25519Point(this, null, null);
this.a = fromBigInteger(new BigInteger(1,
Hex.decode("2AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA984914A144")));
this.b = fromBigInteger(new BigInteger(1,
Hex.decode("7B425ED097B425ED097B425ED097B425ED097B425ED097B4260B5E9C7710C864")));
this.order = new BigInteger(1, Hex.decode("1000000000000000000000000000000014DEF9DEA2F79CD65812631A5CF5D3ED"));
this.cofactor = BigInteger.valueOf(8);
this.coord = Curve25519_DEFAULT_COORDS;
}
protected ECCurve cloneCurve()
{
return new Curve25519();
}
public boolean supportsCoordinateSystem(int coord)
{
switch (coord)
{
case COORD_JACOBIAN_MODIFIED:
return true;
default:
return false;
}
}
public BigInteger getQ()
{
return q;
}
public int getFieldSize()
{
return q.bitLength();
}
public ECFieldElement fromBigInteger(BigInteger x)
{
return new Curve25519FieldElement(x);
}
protected ECPoint createRawPoint(ECFieldElement x, ECFieldElement y, boolean withCompression)
{
return new Curve25519Point(this, x, y, withCompression);
}
protected ECPoint createRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs, boolean withCompression)
{
return new Curve25519Point(this, x, y, zs, withCompression);
}
public ECPoint getInfinity()
{
return infinity;
}
}
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