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This is a collection of JAVA libraries that implement Unbound cryptographic classes for JAVA provider, PKCS11 wrapper, cryptoki, and advapi

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package com.unbound.common.crypto;

import java.security.interfaces.ECPrivateKey;
import java.security.interfaces.RSAPrivateKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.PKCS8EncodedKeySpec;

public class PKCS8
{
  public static byte[] exportECPrivateKey(ECPrivateKey ec)
  {
    return ec.getEncoded();
  }

  public static ECPrivateKey importECPrivateKey(byte[] der)
  {
    try { return (ECPrivateKey) SystemProvider.KeyFactory.getInstance("EC").generatePrivate(new PKCS8EncodedKeySpec(der)); }
    catch (InvalidKeySpecException e) { throw new IllegalArgumentException(e); }
  }

  public static byte[] exportRSAPrivateKey(RSAPrivateKey rsa)
  {
    return rsa.getEncoded();
  }

  public static RSAPrivateKey importRSAPrivateKey(byte[] der)
  {
    try { return (RSAPrivateKey) SystemProvider.KeyFactory.getInstance("RSA").generatePrivate(new PKCS8EncodedKeySpec(der)); }
    catch (InvalidKeySpecException e) { throw new IllegalArgumentException(e); }
  }

}