1 /* 2 * Copyright (c) 1997, 2013, 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 { } 63