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   * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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   * published by the Free Software Foundation.  Oracle designates this
   * particular file as subject to the "Classpath" exception as provided
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   * This code is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
   * version 2 for more details (a copy is included in the LICENSE file that
   * accompanied this code).
   *
   * You should have received a copy of the GNU General Public License version
   * 2 along with this work; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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   */
  
  package java.security.spec;
  
  /**
   * A (transparent) specification of the key material
   * that constitutes a cryptographic key.
   *
   * <p>If the key is stored on a hardware device, its
   * specification may contain information that helps identify the key on the
   * device.
   *
   * <P> A key may be specified in an algorithm-specific way, or in an
   * algorithm-independent encoding format (such as ASN.1).
   * For example, a DSA private key may be specified by its components
   * {@code x}, {@code p}, {@code q}, and {@code g}
   * (see {@link DSAPrivateKeySpec}), or it may be
   * specified using its DER encoding
   * (see {@link PKCS8EncodedKeySpec}).
   *
   * <P> This interface contains no methods or constants. Its only purpose
   * is to group (and provide type safety for) all key specifications.
   * All key specifications must implement this interface.
   *
   * @author Jan Luehe
   *
   *
   * @see java.security.Key
   * @see java.security.KeyFactory
   * @see EncodedKeySpec
   * @see X509EncodedKeySpec
   * @see PKCS8EncodedKeySpec
   * @see DSAPrivateKeySpec
   * @see DSAPublicKeySpec
   *
   * @since 1.2
   */
  
  public interface KeySpec { }
  