1 /*
   2  * Copyright (c) 1997, 1999, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package java.security.spec;
  27 
  28 /**
  29  * A (transparent) specification of the key material
  30  * that constitutes a cryptographic key.
  31  *
  32  * <p>If the key is stored on a hardware device, its
  33  * specification may contain information that helps identify the key on the
  34  * device.
  35  *
  36  * <P> A key may be specified in an algorithm-specific way, or in an
  37  * algorithm-independent encoding format (such as ASN.1).
  38  * For example, a DSA private key may be specified by its components
  39  * {@code x}, {@code p}, {@code q}, and {@code g}
  40  * (see {@link DSAPrivateKeySpec}), or it may be
  41  * specified using its DER encoding
  42  * (see {@link PKCS8EncodedKeySpec}).
  43  *
  44  * <P> This interface contains no methods or constants. Its only purpose
  45  * is to group (and provide type safety for) all key specifications.
  46  * All key specifications must implement this interface.
  47  *
  48  * @author Jan Luehe
  49  *
  50  *
  51  * @see java.security.Key
  52  * @see java.security.KeyFactory
  53  * @see EncodedKeySpec
  54  * @see X509EncodedKeySpec
  55  * @see PKCS8EncodedKeySpec
  56  * @see DSAPrivateKeySpec
  57  * @see DSAPublicKeySpec
  58  *
  59  * @since 1.2
  60  */
  61 
  62 public interface KeySpec { }