2362N/A * Copyright (c) 1996, 2006, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 0N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2362N/A * or visit www.oracle.com if you need additional information or have any 0N/A * The Key interface is the top-level interface for all keys. It 0N/A * defines the functionality shared by all key objects. All keys 0N/A * have three characteristics: 0N/A * <P>This is the key algorithm for that key. The key algorithm is usually 0N/A * an encryption or asymmetric operation algorithm (such as DSA or 0N/A * RSA), which will work with those algorithms and with related 0N/A * algorithms (such as MD5 with RSA, SHA-1 with RSA, Raw DSA, etc.) 0N/A * The name of the algorithm of a key is obtained using the 0N/A * {@link #getAlgorithm() getAlgorithm} method.<P> 0N/A * <LI>An Encoded Form 0N/A * <P>This is an external encoded form for the key used when a standard 0N/A * representation of the key is needed outside the Java Virtual Machine, 0N/A * as when transmitting the key to some other party. The key 0N/A * is encoded according to a standard format (such as 0N/A * X.509 <code>SubjectPublicKeyInfo</code> or PKCS#8), and 0N/A * is returned using the {@link #getEncoded() getEncoded} method. 0N/A * Note: The syntax of the ASN.1 type <code>SubjectPublicKeyInfo</code> 0N/A * is defined as follows: 0N/A * SubjectPublicKeyInfo ::= SEQUENCE { 0N/A * algorithm AlgorithmIdentifier, 0N/A * subjectPublicKey BIT STRING } 0N/A * AlgorithmIdentifier ::= SEQUENCE { 0N/A * algorithm OBJECT IDENTIFIER, 0N/A * parameters ANY DEFINED BY algorithm OPTIONAL } 0N/A * For more information, see 0N/A * Internet X.509 Public Key Infrastructure Certificate and CRL Profile</a>. 0N/A * <P>This is the name of the format of the encoded key. It is returned 0N/A * by the {@link #getFormat() getFormat} method.<P> 0N/A * Keys are generally obtained through key generators, certificates, 0N/A * or various Identity classes used to manage keys. 0N/A * Keys may also be obtained from key specifications (transparent 0N/A * representations of the underlying key material) through the use of a key 0N/A * factory (see {@link KeyFactory}). 0N/A * <p> A Key should use KeyRep as its serialized representation. 0N/A * Note that a serialized Key may contain sensitive information 0N/A * which should not be exposed in untrusted environments. See the 0N/A * Security Appendix</a> 0N/A * of the Serialization Specification for more information. 0N/A * @see KeyPairGenerator 0N/A * @see java.security.spec.KeySpec 0N/A * @author Benjamin Renaud 0N/A // Declare serialVersionUID to be compatible with JDK1.1 0N/A * The class fingerprint that is set to indicate 0N/A * serialization compatibility with a previous 0N/A * version of the class. 0N/A * Returns the standard algorithm name for this key. For 0N/A * example, "DSA" would indicate that this key is a DSA key. 0N/A * See Appendix A in the <a href= 0N/A * Java Cryptography Architecture API Specification & Reference </a> 0N/A * for information about standard algorithm names. 0N/A * @return the name of the algorithm associated with this key. 0N/A * Returns the name of the primary encoding format of this key, 0N/A * or null if this key does not support encoding. 0N/A * The primary encoding format is 0N/A * named in terms of the appropriate ASN.1 data format, if an 0N/A * ASN.1 specification for this key exists. 0N/A * For example, the name of the ASN.1 data format for public 0N/A * keys is <I>SubjectPublicKeyInfo</I>, as 0N/A * defined by the X.509 standard; in this case, the returned format is 0N/A * <code>"X.509"</code>. Similarly, 0N/A * the name of the ASN.1 data format for private keys is 0N/A * <I>PrivateKeyInfo</I>, 0N/A * as defined by the PKCS #8 standard; in this case, the returned format is 0N/A * <code>"PKCS#8"</code>. 0N/A * @return the primary encoding format of the key. 0N/A * Returns the key in its primary encoding format, or null 0N/A * if this key does not support encoding. 0N/A * @return the encoded key, or null if the key does not support