97 lines
3.1 KiB
Java
97 lines
3.1 KiB
Java
/* IvParameterSpec.java -- A simple wrapper for initialization vectors.
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Copyright (C) 2004 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package javax.crypto.spec;
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import java.security.spec.AlgorithmParameterSpec;
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/**
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* A wrapper for an initialization vector. An initialization vector is
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* necessary for any cipher in any <i>feedback mode</i>, e.g. CBC.
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*
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* @author Casey Marshall (csm@gnu.org)
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*/
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public class IvParameterSpec implements AlgorithmParameterSpec
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{
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// Fields.
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// ------------------------------------------------------------------------
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/** The IV. */
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private byte[] iv;
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// Constructors.
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// ------------------------------------------------------------------------
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/**
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* Create a new initialization vector spec from an entire byte array.
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*
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* @param iv The IV bytes.
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*/
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public IvParameterSpec(byte[] iv)
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{
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this(iv, 0, iv.length);
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}
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/**
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* Create a new initialization vector spec from part of a byte array.
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*
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* @param iv The IV bytes.
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* @param off The offset into the IV bytes.
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* @param len The number of IV bytes.
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*/
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public IvParameterSpec(byte[] iv, int off, int len)
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{
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this.iv = new byte[len];
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System.arraycopy(iv, off, this.iv, 0, len);
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}
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// Instance methods.
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// ------------------------------------------------------------------------
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/**
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* Returns the IV. This method does not copy the byte array.
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*
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* @return The IV.
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*/
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public byte[] getIV()
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{
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return iv;
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}
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}
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