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| 1 | /* | ||
| 2 | * Copyright (c) 2003, 2007, 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 javax.crypto.spec; | ||
| 27 | |||
| 28 | import java.math.BigInteger; | ||
| 29 | import java.security.spec.AlgorithmParameterSpec; | ||
| 30 | |||
| 31 | /** | ||
| 32 | * This class specifies the source for encoding input P in OAEP Padding, | ||
| 33 | * as defined in the | ||
| 34 | * <a href="http://www.ietf.org/rfc/rfc3447.txt">PKCS #1</a> | ||
| 35 | * standard. | ||
| 36 | * <pre> | ||
| 37 | * PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= { | ||
| 38 | * { OID id-pSpecified PARAMETERS OCTET STRING }, | ||
| 39 | * ... -- Allows for future expansion -- | ||
| 40 | * } | ||
| 41 | * </pre> | ||
| 42 | * @author Valerie Peng | ||
| 43 | * | ||
| 44 | * @since 1.5 | ||
| 45 | */ | ||
| 46 | public class PSource { | ||
| 47 | |||
| 48 | private String pSrcName; | ||
| 49 | |||
| 50 | /** | ||
| 51 | * Constructs a source of the encoding input P for OAEP | ||
| 52 | * padding as defined in the PKCS #1 standard using the | ||
| 53 | * specified PSource algorithm. | ||
| 54 | * @param pSrcName the algorithm for the source of the | ||
| 55 | * encoding input P. | ||
| 56 | * @exception NullPointerException if <code>pSrcName</code> | ||
| 57 | * is null. | ||
| 58 | */ | ||
| 59 | protected PSource(String pSrcName) { | ||
| 60 | if (pSrcName == null) { | ||
| 61 | throw new NullPointerException("pSource algorithm is null"); | ||
| 62 | } | ||
| 63 | this.pSrcName = pSrcName; | ||
| 64 | } | ||
| 65 | /** | ||
| 66 | * Returns the PSource algorithm name. | ||
| 67 | * | ||
| 68 | * @return the PSource algorithm name. | ||
| 69 | */ | ||
| 70 | public String getAlgorithm() { | ||
| 71 | return pSrcName; | ||
| 72 | } | ||
| 73 | |||
| 74 | /** | ||
| 75 | * This class is used to explicitly specify the value for | ||
| 76 | * encoding input P in OAEP Padding. | ||
| 77 | * | ||
| 78 | * @since 1.5 | ||
| 79 | */ | ||
| 80 | public static final class PSpecified extends PSource { | ||
| 81 | |||
| 82 | private byte[] p = new byte[0]; | ||
| 83 | |||
| 84 | /** | ||
| 85 | * The encoding input P whose value equals byte[0]. | ||
| 86 | */ | ||
| 87 | public static final PSpecified DEFAULT = new PSpecified(new byte[0]); | ||
| 88 | |||
| 89 | /** | ||
| 90 | * Constructs the source explicitly with the specified | ||
| 91 | * value <code>p</code> as the encoding input P. | ||
| 92 | * Note: | ||
| 93 | * @param p the value of the encoding input. The contents | ||
| 94 | * of the array are copied to protect against subsequent | ||
| 95 | * modification. | ||
| 96 | * @exception NullPointerException if <code>p</code> is null. | ||
| 97 | */ | ||
| 98 | public PSpecified(byte[] p) { | ||
| 99 | super("PSpecified"); | ||
| 100 | this.p = (byte[]) p.clone(); | ||
| 101 | } | ||
| 102 | /** | ||
| 103 | * Returns the value of encoding input P. | ||
| 104 | * @return the value of encoding input P. A new array is | ||
| 105 | * returned each time this method is called. | ||
| 106 | */ | ||
| 107 | public byte[] getValue() { | ||
| 108 | return (p.length==0? p: (byte[])p.clone()); | ||
| 109 | } | ||
| 110 | } | ||
| 111 | } | ||