package org.bouncycastle.math.ec.custom.sec; import java.math.BigInteger; import org.bouncycastle.math.ec.ECConstants; import org.bouncycastle.math.ec.ECCurve; import org.bouncycastle.math.ec.ECFieldElement; import org.bouncycastle.math.ec.ECPoint; import org.bouncycastle.util.encoders.Hex; public class SecP224K1Curve extends ECCurve.AbstractFp { public static final BigInteger q = new BigInteger(1, Hex.decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFE56D")); private static final int SECP224K1_DEFAULT_COORDS = COORD_JACOBIAN; protected SecP224K1Point infinity; public SecP224K1Curve() { super(q); this.infinity = new SecP224K1Point(this, null, null); this.a = fromBigInteger(ECConstants.ZERO); this.b = fromBigInteger(BigInteger.valueOf(5)); this.order = new BigInteger(1, Hex.decode("010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7")); this.cofactor = BigInteger.valueOf(1); this.coord = SECP224K1_DEFAULT_COORDS; } protected ECCurve cloneCurve() { return new SecP224K1Curve(); } public boolean supportsCoordinateSystem(int coord) { switch (coord) { case COORD_JACOBIAN: return true; default: return false; } } public BigInteger getQ() { return q; } public int getFieldSize() { return q.bitLength(); } public ECFieldElement fromBigInteger(BigInteger x) { return new SecP224K1FieldElement(x); } protected ECPoint createRawPoint(ECFieldElement x, ECFieldElement y, boolean withCompression) { return new SecP224K1Point(this, x, y, withCompression); } protected ECPoint createRawPoint(ECFieldElement x, ECFieldElement y, ECFieldElement[] zs, boolean withCompression) { return new SecP224K1Point(this, x, y, zs, withCompression); } public ECPoint getInfinity() { return infinity; } }