1 /* BlockCipherParameterSpec.java -- 2 Copyright (C) 2002, 2006 Free Software Foundation, Inc. 3 4 This file is a part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2 of the License, or (at 9 your option) any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 19 USA 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 39 package gnu.javax.crypto.jce.spec; 40 41 import gnu.java.security.util.Util; 42 43 import java.security.spec.AlgorithmParameterSpec; 44 45 /** 46 * Block cipher parameters in GNU are the cipher's name, its block and key 47 * sizes, and an optional initialization vector. 48 */ 49 public class BlockCipherParameterSpec 50 implements AlgorithmParameterSpec 51 { 52 /** The initialization vector. */ 53 protected byte[] iv; 54 /** The cipher's block size, in bytes. */ 55 protected int blockSize; 56 /** The cipher's key size, in bytes. */ 57 protected int keySize; 58 59 /** 60 * Create a new parameter specification. 61 * 62 * @param iv The initialization vector, or <code>null</code> if there is no 63 * IV. 64 * @param blockSize The cipher's block size, in bytes. 65 * @param keySize The cipher's key size, in bytes. 66 */ BlockCipherParameterSpec(byte[] iv, int blockSize, int keySize)67 public BlockCipherParameterSpec(byte[] iv, int blockSize, int keySize) 68 { 69 this.iv = (iv != null) ? (byte[]) iv.clone() : null; 70 this.blockSize = blockSize; 71 this.keySize = keySize; 72 } 73 74 /** 75 * Create a new parameter specification with no IV. 76 * 77 * @param blockSize The cipher's block size, in bytes. 78 * @param keySize The cipher's key size, in bytes. 79 */ BlockCipherParameterSpec(int blockSize, int keySize)80 public BlockCipherParameterSpec(int blockSize, int keySize) 81 { 82 this(null, blockSize, keySize); 83 } 84 85 /** 86 * Get the initialization vector for the cipher, or <code>null</code> if 87 * there is no IV. 88 * 89 * @return The IV. 90 */ getIV()91 public byte[] getIV() 92 { 93 return iv; 94 } 95 96 /** 97 * Get the block size of the cipher these parameters are for. 98 * 99 * @return The block size. 100 */ getBlockSize()101 public int getBlockSize() 102 { 103 return blockSize; 104 } 105 106 /** 107 * Get the key size of the cipher these parameters are for. 108 * 109 * @return The block size. 110 */ getKeySize()111 public int getKeySize() 112 { 113 return keySize; 114 } 115 toString()116 public String toString() 117 { 118 return getClass().getName() + " { " 119 + ((iv != null) ? ("IV=" + Util.toString(iv)) + ", " : "") 120 + "BS=" + blockSize + ", KS=" + keySize + " }"; 121 } 122 } 123