/* * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * This code 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 * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */package javax.crypto.spec;import java.security.spec.AlgorithmParameterSpec;/** * This class specifies an <i>initialization vector</i> (IV). * Examples which use IVs are ciphers in feedback mode, * e.g., DES in CBC mode and RSA ciphers with OAEP encoding * operation. * * @author Jan Luehe * * @since 1.4 */public class IvParameterSpec implements AlgorithmParameterSpec { private byte[] iv; /** * Creates an IvParameterSpec object using the bytes in <code>iv</code> * as the IV. * * @param iv the buffer with the IV. The contents of the * buffer are copied to protect against subsequent modification. * @throws NullPointerException if <code>iv</code> is <code>null</code> */ public IvParameterSpec(byte[] iv) { this(iv, 0, iv.length); } /** * Creates an IvParameterSpec object using the first <code>len</code> * bytes in <code>iv</code>, beginning at <code>offset</code> * inclusive, as the IV. * * <p> The bytes that constitute the IV are those between * <code>iv[offset]</code> and <code>iv[offset+len-1]</code> inclusive. * * @param iv the buffer with the IV. The first <code>len</code> * bytes of the buffer beginning at <code>offset</code> inclusive * are copied to protect against subsequent modification. * @param offset the offset in <code>iv</code> where the IV * starts. * @param len the number of IV bytes. * @throws IllegalArgumentException if <code>iv</code> is <code>null</code> * or <code>(iv.length - offset < len)</code> * @throws ArrayIndexOutOfBoundsException is thrown if <code>offset</code> * or <code>len</code> index bytes outside the <code>iv</code>. */ public IvParameterSpec(byte[] iv, int offset, int len) { if (iv == null) { throw new IllegalArgumentException("IV missing"); } if (iv.length - offset < len) { throw new IllegalArgumentException ("IV buffer too short for given offset/length combination"); } if (len < 0) { throw new ArrayIndexOutOfBoundsException("len is negative"); } this.iv = new byte[len]; System.arraycopy(iv, offset, this.iv, 0, len); } /** * Returns the initialization vector (IV). * * @return the initialization vector (IV). Returns a new array * each time this method is called. */ public byte[] getIV() { return (byte[])this.iv.clone(); }}
/*
* Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package javax.crypto.spec;
import java.security.spec.AlgorithmParameterSpec;
/**
* This class specifies an <i>initialization vector</i> (IV).
* Examples which use IVs are ciphers in feedback mode,
* e.g., DES in CBC mode and RSA ciphers with OAEP encoding
* operation.
*
* @author Jan Luehe
*
* @since 1.4
*/
public class IvParameterSpec implements AlgorithmParameterSpec {
private byte[] iv;
/**
* Creates an IvParameterSpec object using the bytes in <code>iv</code>
* as the IV.
*
* @param iv the buffer with the IV. The contents of the
* buffer are copied to protect against subsequent modification.
* @throws NullPointerException if <code>iv</code> is <code>null</code>
*/
public IvParameterSpec(byte[] iv) {
this(iv, 0, iv.length);
}
/**
* Creates an IvParameterSpec object using the first <code>len</code>
* bytes in <code>iv</code>, beginning at <code>offset</code>
* inclusive, as the IV.
*
* <p> The bytes that constitute the IV are those between
* <code>iv[offset]</code> and <code>iv[offset+len-1]</code> inclusive.
*
* @param iv the buffer with the IV. The first <code>len</code>
* bytes of the buffer beginning at <code>offset</code> inclusive
* are copied to protect against subsequent modification.
* @param offset the offset in <code>iv</code> where the IV
* starts.
* @param len the number of IV bytes.
* @throws IllegalArgumentException if <code>iv</code> is <code>null</code>
* or <code>(iv.length - offset < len)</code>
* @throws ArrayIndexOutOfBoundsException is thrown if <code>offset</code>
* or <code>len</code> index bytes outside the <code>iv</code>.
*/
public IvParameterSpec(byte[] iv, int offset, int len) {
if (iv == null) {
throw new IllegalArgumentException("IV missing");
}
if (iv.length - offset < len) {
throw new IllegalArgumentException
("IV buffer too short for given offset/length combination");
}
if (len < 0) {
throw new ArrayIndexOutOfBoundsException("len is negative");
}
this.iv = new byte[len];
System.arraycopy(iv, offset, this.iv, 0, len);
}
/**
* Returns the initialization vector (IV).
*
* @return the initialization vector (IV). Returns a new array
* each time this method is called.
*/
public byte[] getIV() {
return (byte[])this.iv.clone();
}
}