2362N/A * Copyright (c) 1997, 2007, Oracle and/or its affiliates. All rights reserved. 0N/A * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 0N/A * This code is free software; you can redistribute it and/or modify it 0N/A * under the terms of the GNU General Public License version 2 only, as 2362N/A * published by the Free Software Foundation. Oracle designates this 0N/A * particular file as subject to the "Classpath" exception as provided 2362N/A * by Oracle in the LICENSE file that accompanied this code. 0N/A * This code is distributed in the hope that it will be useful, but WITHOUT 0N/A * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 0N/A * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 0N/A * version 2 for more details (a copy is included in the LICENSE file that 0N/A * accompanied this code). 0N/A * You should have received a copy of the GNU General Public License version 0N/A * 2 along with this work; if not, write to the Free Software Foundation, 0N/A * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 2362N/A * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 2362N/A * or visit www.oracle.com if you need additional information or have any 0N/A * This class represents a block cipher in one of its modes. It wraps 0N/A * a SymmetricCipher maintaining the mode state and providing 0N/A * the capability to encrypt amounts of data larger than a single block. 0N/A * @see ElectronicCodeBook 0N/A * @see CipherBlockChaining 0N/A * @see CipherFeedback 0N/A * @see OutputFeedback 0N/A // the embedded block cipher 0N/A // the block size of the embedded block cipher 0N/A // the initialization vector 0N/A * Gets the block size of the embedded cipher. 0N/A * @return the block size of the embedded cipher 0N/A * Gets the name of the feedback mechanism 0N/A * @return the name of the feedback mechanism 0N/A * Save the current content of this cipher. 0N/A * Restores the content of this cipher to the previous saved one. 0N/A * Initializes the cipher in the specified mode with the given key 0N/A * @param decrypting flag indicating encryption or decryption mode 0N/A * @param algorithm the algorithm name (never null) 0N/A * @param key the key (never null) 0N/A * @param iv the iv (either null or blockSize bytes long) 0N/A * @exception InvalidKeyException if the given key is inappropriate for 0N/A * initializing this cipher 0N/A * Gets the initialization vector. 0N/A * @return the initialization vector 0N/A * Resets the iv to its original value. 0N/A * This is used when doFinal is called in the Cipher class, so that the 0N/A * cipher can be reused (with its original iv). 0N/A * Performs encryption operation. 0N/A * <p>The input <code>plain</code>, starting at <code>plainOffset</code> 0N/A * and ending at <code>(plainOffset+plainLen-1)</code>, is encrypted. 0N/A * The result is stored in <code>cipher</code>, starting at 0N/A * <code>cipherOffset</code>. 0N/A * <p>The subclass that implements Cipher should ensure that 0N/A * <code>init</code> has been called before this method is called. 0N/A * @param plain the input buffer with the data to be encrypted 0N/A * @param plainOffset the offset in <code>plain</code> 0N/A * @param plainLen the length of the input data 0N/A * @param cipher the buffer for the encryption result 0N/A * @param cipherOffset the offset in <code>cipher</code> 0N/A * Performs encryption operation for the last time. 0N/A * <p>NOTE: For cipher feedback modes which does not perform 0N/A * special handling for the last few blocks, this is essentially 0N/A * the same as <code>encrypt(...)</code>. Given most modes do 0N/A * not do special handling, the default impl for this method is 0N/A * to simply call <code>encrypt(...)</code>. 0N/A * @param plain the input buffer with the data to be encrypted 0N/A * @param plainOffset the offset in <code>plain</code> 0N/A * @param plainLen the length of the input data 0N/A * @param cipher the buffer for the encryption result 0N/A * @param cipherOffset the offset in <code>cipher</code> 0N/A * Performs decryption operation. 0N/A * <p>The input <code>cipher</code>, starting at <code>cipherOffset</code> 0N/A * and ending at <code>(cipherOffset+cipherLen-1)</code>, is decrypted. 0N/A * The result is stored in <code>plain</code>, starting at 0N/A * <code>plainOffset</code>. 0N/A * <p>The subclass that implements Cipher should ensure that 0N/A * <code>init</code> has been called before this method is called. 0N/A * @param cipher the input buffer with the data to be decrypted 0N/A * @param cipherOffset the offset in <code>cipher</code> 0N/A * @param cipherLen the length of the input data 0N/A * @param plain the buffer for the decryption result 0N/A * @param plainOffset the offset in <code>plain</code> 0N/A * Performs decryption operation for the last time. 0N/A * <p>NOTE: For cipher feedback modes which does not perform 0N/A * special handling for the last few blocks, this is essentially 0N/A * the same as <code>encrypt(...)</code>. Given most modes do 0N/A * not do special handling, the default impl for this method is 0N/A * to simply call <code>decrypt(...)</code>. 0N/A * @param cipher the input buffer with the data to be decrypted 0N/A * @param cipherOffset the offset in <code>cipher</code> 0N/A * @param cipherLen the length of the input data 0N/A * @param plain the buffer for the decryption result 0N/A * @param plainOffset the offset in <code>plain</code>