| /* IvParameterSpec.java -- A simple wrapper for initialization vectors. |
| Copyright (C) 2004 Free Software Foundation, Inc. |
| |
| This file is part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2, or (at your option) |
| any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; see the file COPYING. If not, write to the |
| Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA |
| 02110-1301 USA. |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package javax.crypto.spec; |
| |
| import java.security.spec.AlgorithmParameterSpec; |
| |
| /** |
| * A wrapper for an initialization vector. An initialization vector is |
| * necessary for any cipher in any <i>feedback mode</i>, e.g. CBC. |
| * |
| * @author Casey Marshall (csm@gnu.org) |
| */ |
| public class IvParameterSpec implements AlgorithmParameterSpec |
| { |
| |
| // Fields. |
| // ------------------------------------------------------------------------ |
| |
| /** The IV. */ |
| private byte[] iv; |
| |
| // Constructors. |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * Create a new initialization vector spec from an entire byte array. |
| * |
| * @param iv The IV bytes. |
| */ |
| public IvParameterSpec(byte[] iv) |
| { |
| this(iv, 0, iv.length); |
| } |
| |
| /** |
| * Create a new initialization vector spec from part of a byte array. |
| * |
| * @param iv The IV bytes. |
| * @param off The offset into the IV bytes. |
| * @param len The number of IV bytes. |
| */ |
| public IvParameterSpec(byte[] iv, int off, int len) |
| { |
| this.iv = new byte[len]; |
| System.arraycopy(iv, off, this.iv, 0, len); |
| } |
| |
| // Instance methods. |
| // ------------------------------------------------------------------------ |
| |
| /** |
| * Returns the IV. This method does not copy the byte array. |
| * |
| * @return The IV. |
| */ |
| public byte[] getIV() |
| { |
| return iv; |
| } |
| } |