| /* |
| * Copyright (c) 2003, 2011, 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 javax.crypto.spec; |
| |
| /** |
| * This class specifies the source for encoding input P in OAEP Padding, |
| * as defined in the |
| * <a href="http://www.ietf.org/rfc/rfc3447.txt">PKCS #1</a> |
| * standard. |
| * <pre> |
| * PKCS1PSourceAlgorithms ALGORITHM-IDENTIFIER ::= { |
| * { OID id-pSpecified PARAMETERS OCTET STRING }, |
| * ... -- Allows for future expansion -- |
| * } |
| * </pre> |
| * @author Valerie Peng |
| * |
| * @since 1.5 |
| */ |
| public class PSource { |
| |
| private String pSrcName; |
| |
| /** |
| * Constructs a source of the encoding input P for OAEP |
| * padding as defined in the PKCS #1 standard using the |
| * specified PSource algorithm. |
| * @param pSrcName the algorithm for the source of the |
| * encoding input P. |
| * @exception NullPointerException if <code>pSrcName</code> |
| * is null. |
| */ |
| protected PSource(String pSrcName) { |
| if (pSrcName == null) { |
| throw new NullPointerException("pSource algorithm is null"); |
| } |
| this.pSrcName = pSrcName; |
| } |
| /** |
| * Returns the PSource algorithm name. |
| * |
| * @return the PSource algorithm name. |
| */ |
| public String getAlgorithm() { |
| return pSrcName; |
| } |
| |
| /** |
| * This class is used to explicitly specify the value for |
| * encoding input P in OAEP Padding. |
| * |
| * @since 1.5 |
| */ |
| public static final class PSpecified extends PSource { |
| |
| private byte[] p = new byte[0]; |
| |
| /** |
| * The encoding input P whose value equals byte[0]. |
| */ |
| public static final PSpecified DEFAULT = new PSpecified(new byte[0]); |
| |
| /** |
| * Constructs the source explicitly with the specified |
| * value <code>p</code> as the encoding input P. |
| * Note: |
| * @param p the value of the encoding input. The contents |
| * of the array are copied to protect against subsequent |
| * modification. |
| * @exception NullPointerException if <code>p</code> is null. |
| */ |
| public PSpecified(byte[] p) { |
| super("PSpecified"); |
| this.p = p.clone(); |
| } |
| /** |
| * Returns the value of encoding input P. |
| * @return the value of encoding input P. A new array is |
| * returned each time this method is called. |
| */ |
| public byte[] getValue() { |
| return (p.length==0? p: p.clone()); |
| } |
| } |
| } |