AbstractWrappedECKey.java

/* 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;
  }
}