package DNA.Cryptography;

import java.security.*;

import org.bouncycastle.asn1.x9.*;

import org.bouncycastle.crypto.params.ECDomainParameters;

import org.bouncycastle.math.ec.ECPoint;

import DNA.Helper;

public class ECC {

private static final X9ECParameters secp256r1nc = ECNamedCurveTable.getByName("secp256r1");

public static final ECDomainParameters secp256r1 = new ECDomainParameters(secp256r1nc.getCurve(), secp256r1nc.getG(), secp256r1nc.getN(), secp256r1nc.getH(), secp256r1nc.getSeed());

public static int compare(ECPoint a, ECPoint b) {

if (a == b) {

return 0;

}

int result = a.getXCoord().toBigInteger().compareTo(b.getXCoord().toBigInteger());

if (result != 0) {

return result;

}

return a.getYCoord().toBigInteger().compareTo(b.getYCoord().toBigInteger());

}

public static byte[] generateKey(int len) {

byte[] key = new byte[len];

SecureRandom sr = new SecureRandom();

sr.nextBytes(key);

return key;

}

public static byte[] generateKey() {

byte[] key = new byte[32];

SecureRandom sr = new SecureRandom();

sr.nextBytes(key);

return key;

}

public static String toString(ECPoint p) {

return Helper.toHexString(p.getEncoded(true));

}

}