gurux.dlms.ecdsa.GXEcdsa Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of gurux.dlms Show documentation

gurux.dlms.java package is used to communicate with DLMS devices.

There is a newer version: 4.0.72

//
// --------------------------------------------------------------------------
//  Gurux Ltd

package gurux.dlms.ecdsa;

import java.security.InvalidAlgorithmParameterException;
import java.security.KeyPair;
import java.security.KeyPairGenerator;
import java.security.NoSuchAlgorithmException;
import java.security.spec.ECGenParameterSpec;

import gurux.dlms.asn.enums.Ecc;

/**
 * ECDSA asynchronous ciphering.
 */
final public class GXEcdsa {

    /**
     * Generates new key pair.
     * 
     * @return New Key pair.
     * @throws NoSuchAlgorithmException
     *             No such algorithm.
     * @throws InvalidAlgorithmParameterException
     *             Invalid algorithm parameter.
     */
    public static KeyPair generateKeyPair(final Ecc ecc)
            throws NoSuchAlgorithmException,
            InvalidAlgorithmParameterException {
        // Generate keys.
        if (ecc == Ecc.P256) {
            KeyPairGenerator g = KeyPairGenerator.getInstance("EC");
            ECGenParameterSpec kpgparams = new ECGenParameterSpec("secp256r1");
            g.initialize(kpgparams);
            return g.generateKeyPair();
        }
        KeyPairGenerator g = KeyPairGenerator.getInstance("EC");
        ECGenParameterSpec kpgparams = new ECGenParameterSpec("secp384r1");
        g.initialize(kpgparams);
        return g.generateKeyPair();
    }
}