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 18 package javax.crypto.spec; 19 20 import java.security.spec.AlgorithmParameterSpec; 21 22 /** 23 * The algorithm parameter specification for a <i>password based encryption</i> 24 * algorithm. 25 * <p> 26 * Password based encryption is described in <a 27 * href="http://www.ietf.org/rfc/rfc2898.txt">PKCS #5</a>. 28 * 29 */ 30 public class PBEParameterSpec implements AlgorithmParameterSpec { 31 32 private final byte[] salt; 33 private final int iterationCount; 34 35 /** 36 * Creates a new <code>PBEParameterSpec</code> with the specified salt and 37 * iteration count. 38 * 39 * @param salt 40 * the salt. 41 * @param iterationCount 42 * the iteration count. 43 * @throws NullPointerException 44 * if salt is null. 45 */ 46 public PBEParameterSpec(byte[] salt, int iterationCount) { 47 if (salt == null) { 48 throw new NullPointerException("salt == null"); 49 } 50 this.salt = new byte[salt.length]; 51 System.arraycopy(salt, 0, this.salt, 0, salt.length); 52 this.iterationCount = iterationCount; 53 } 54 55 /** 56 * Returns a copy to the salt. 57 * 58 * @return a copy to the salt. 59 */ 60 public byte[] getSalt() { 61 byte[] result = new byte[salt.length]; 62 System.arraycopy(salt, 0, result, 0, salt.length); 63 return result; 64 } 65 66 /** 67 * Returns the iteration count. 68 * 69 * @return the iteration count. 70 */ 71 public int getIterationCount() { 72 return iterationCount; 73 } 74 } 75
