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| 1 | +/* | |
| 2 | + * Copyright (c) 2005, 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 sun.security.provider; | |
| 27 | + | |
| 28 | +import java.math.BigInteger; | |
| 29 | +import java.security.KeyRep; | |
| 30 | +import java.security.InvalidKeyException; | |
| 31 | + | |
| 32 | +/** | |
| 33 | + * An X.509 public key for the Digital Signature Algorithm. | |
| 34 | + * | |
| 35 | + * The difference between DSAPublicKeyImpl and DSAPublicKey is that | |
| 36 | + * DSAPublicKeyImpl calls writeReplace with KeyRep, and DSAPublicKey | |
| 37 | + * calls writeObject. | |
| 38 | + * | |
| 39 | + * See the comments in DSAKeyFactory, 4532506, and 6232513. | |
| 40 | + * | |
| 41 | + */ | |
| 42 | + | |
| 43 | +public final class DSAPublicKeyImpl extends DSAPublicKey { | |
| 44 | + | |
| 45 | + private static final long serialVersionUID = 7819830118247182730L; | |
| 46 | + | |
| 47 | + /** | |
| 48 | + * Make a DSA public key out of a public key and three parameters. | |
| 49 | + * The p, q, and g parameters may be null, but if so, parameters will need | |
| 50 | + * to be supplied from some other source before this key can be used in | |
| 51 | + * cryptographic operations. PKIX RFC2459bis explicitly allows DSA public | |
| 52 | + * keys without parameters, where the parameters are provided in the | |
| 53 | + * issuer's DSA public key. | |
| 54 | + * | |
| 55 | + * @param y the actual key bits | |
| 56 | + * @param p DSA parameter p, may be null if all of p, q, and g are null. | |
| 57 | + * @param q DSA parameter q, may be null if all of p, q, and g are null. | |
| 58 | + * @param g DSA parameter g, may be null if all of p, q, and g are null. | |
| 59 | + */ | |
| 60 | + public DSAPublicKeyImpl(BigInteger y, BigInteger p, BigInteger q, | |
| 61 | + BigInteger g) | |
| 62 | + throws InvalidKeyException { | |
| 63 | + super(y, p, q, g); | |
| 64 | + } | |
| 65 | + | |
| 66 | + /** | |
| 67 | + * Make a DSA public key from its DER encoding (X.509). | |
| 68 | + */ | |
| 69 | + public DSAPublicKeyImpl(byte[] encoded) throws InvalidKeyException { | |
| 70 | + super(encoded); | |
| 71 | + } | |
| 72 | + | |
| 73 | + protected Object writeReplace() throws java.io.ObjectStreamException { | |
| 74 | + return new KeyRep(KeyRep.Type.PUBLIC, | |
| 75 | + getAlgorithm(), | |
| 76 | + getFormat(), | |
| 77 | + getEncoded()); | |
| 78 | + } | |
| 79 | +} | |