1/* 2 * Licensed to the Apache Software Foundation (ASF) under one or more 3 * contributor license agreements. See the NOTICE file distributed with 4 * this work for additional information regarding copyright ownership. 5 * The ASF licenses this file to You under the Apache License, Version 2.0 6 * (the "License"); you may not use this file except in compliance with 7 * the License. You may obtain a copy of the License at 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 */ 17 18package javax.crypto.spec; 19 20import libcore.util.EmptyArray; 21 22/** 23 * The source of the label <code>L</code> as specified in <a 24 * href="http://www.ietf.org/rfc/rfc3447.txt"> PKCS #1</a>. 25 */ 26public class PSource { 27 28 private String pSrcName; 29 30 private PSource() {} 31 32 /** 33 * Creates a new <code>PSource</code> instance with the specified source 34 * algorithm identifier. 35 * 36 * @param pSrcName 37 * the source algorithm identifier. 38 * @throws NullPointerException 39 * if pSrcName is null. 40 */ 41 protected PSource(String pSrcName) { 42 if (pSrcName == null) { 43 throw new NullPointerException("pSrcName == null"); 44 } 45 this.pSrcName = pSrcName; 46 } 47 48 /** 49 * Returns the source algorithm identifier. 50 * 51 * @return the source algorithm identifier. 52 */ 53 public String getAlgorithm() { 54 return pSrcName; 55 } 56 57 /** 58 * The explicit specification of the parameter <code>P</code> used in the 59 * source algorithm. 60 */ 61 public static final class PSpecified extends PSource { 62 63 private final byte[] p; 64 65 /** 66 * The instance of <code>PSpecified</code> with the default value 67 * <code>byte[0]</code> for <code>P</code> 68 */ 69 public static final PSpecified DEFAULT = new PSpecified(); 70 71 private PSpecified() { 72 super("PSpecified"); 73 p = EmptyArray.BYTE; 74 } 75 76 /** 77 * Creates a new instance of <code>PSpecified</code> with the specified 78 * parameter <code>P</code>. 79 * 80 * @param p 81 * the parameter <code>P</code>. 82 * @throws NullPointerException 83 * if <code>p</code> is null. 84 */ 85 public PSpecified(byte[] p) { 86 super("PSpecified"); 87 if (p == null) { 88 throw new NullPointerException("p == null"); 89 } 90 //TODO: It is unknown which name should be used! 91 //super(""); 92 this.p = new byte[p.length]; 93 System.arraycopy(p, 0, this.p, 0, p.length); 94 } 95 96 /** 97 * Returns a copy of the value of the parameter <code>P</code>. 98 * 99 * @return a copy of the value of the parameter <code>P</code> 100 */ 101 public byte[] getValue() { 102 byte[] result = new byte[p.length]; 103 System.arraycopy(p, 0, result, 0, p.length); 104 return result; 105 } 106 } 107} 108