org.cryptacular.adapter.AbstractWrappedECKey.java Source code

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Here is the source code for org.cryptacular.adapter.AbstractWrappedECKey.java

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/* See LICENSE for licensing and NOTICE for copyright. */
package org.cryptacular.adapter;

import java.security.spec.ECParameterSpec;
import java.security.spec.ECPoint;
import org.bouncycastle.crypto.params.ECDomainParameters;
import org.bouncycastle.crypto.params.ECKeyParameters;
import org.bouncycastle.jcajce.provider.asymmetric.util.EC5Util;

/**
 * Base class for wrapped EC keys.
 *
 * @param  <T>  EC key parameters type.
 *
 * @author  Middleware Services
 */
public abstract class AbstractWrappedECKey<T extends ECKeyParameters> extends AbstractWrappedKey<T> {

    /** Elliptic curve algorithm name. */
    private static final String ALGORITHM = "EC";

    /**
     * Creates a new instance that wraps the given key.
     *
     * @param  wrappedKey  Key to wrap.
     */
    public AbstractWrappedECKey(final T wrappedKey) {
        super(wrappedKey);
    }

    /** @return  EC domain parameters. */
    public ECParameterSpec getParams() {
        final ECDomainParameters params = delegate.getParameters();
        return new ECParameterSpec(EC5Util.convertCurve(params.getCurve(), params.getSeed()),
                new ECPoint(params.getG().normalize().getXCoord().toBigInteger(),
                        params.getG().normalize().getYCoord().toBigInteger()),
                params.getN(), params.getH().intValue());
    }

    @Override
    public String getAlgorithm() {
        return ALGORITHM;
    }
}