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/* * Copyright (c) 2005, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation.  Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package sun.security.provider; import java.math.BigInteger;import java.security.KeyRep;import java.security.InvalidKeyException; /** * An X.509 public key for the Digital Signature Algorithm. * * The difference between DSAPublicKeyImpl and DSAPublicKey is that * DSAPublicKeyImpl calls writeReplace with KeyRep, and DSAPublicKey * calls writeObject. * * See the comments in DSAKeyFactory, 4532506, and 6232513. * */ public final class DSAPublicKeyImpl extends DSAPublicKey {     private static final long serialVersionUID = 7819830118247182730L;     /**     * Make a DSA public key out of a public key and three parameters.     * The p, q, and g parameters may be null, but if so, parameters will need     * to be supplied from some other source before this key can be used in     * cryptographic operations.  PKIX RFC2459bis explicitly allows DSA public     * keys without parameters, where the parameters are provided in the     * issuer's DSA public key.     *     * @param y the actual key bits     * @param p DSA parameter p, may be null if all of p, q, and g are null.     * @param q DSA parameter q, may be null if all of p, q, and g are null.     * @param g DSA parameter g, may be null if all of p, q, and g are null.     */    public DSAPublicKeyImpl(BigInteger y, BigInteger p, BigInteger q,                        BigInteger g)                throws InvalidKeyException {        super(y, p, q, g);    }     /**     * Make a DSA public key from its DER encoding (X.509).     */    public DSAPublicKeyImpl(byte[] encoded) throws InvalidKeyException {        super(encoded);    }     protected Object writeReplace() throws java.io.ObjectStreamException {        return new KeyRep(KeyRep.Type.PUBLIC,                        getAlgorithm(),                        getFormat(),                        getEncoded());    }}