2362N/A * Copyright (c) 1998, 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 defines the <i>Service Provider Interface</i> (<b>SPI</b>) 0N/A * for the <code>Mac</code> class. 0N/A * All the abstract methods in this class must be implemented by each 0N/A * cryptographic service provider who wishes to supply the implementation 0N/A * of a particular MAC algorithm. 0N/A * <p> Implementations are free to implement the Cloneable interface. 0N/A * Returns the length of the MAC in bytes. 0N/A * @return the MAC length in bytes. 0N/A * Initializes the MAC with the given (secret) key and algorithm 0N/A * @param key the (secret) key. 0N/A * @param params the algorithm parameters. 0N/A * @exception InvalidKeyException if the given key is inappropriate for 0N/A * initializing this MAC. 0N/A * @exception InvalidAlgorithmParameterException if the given algorithm 0N/A * parameters are inappropriate for this MAC. 0N/A * Processes the given byte. 0N/A * @param input the input byte to be processed. 0N/A * Processes the first <code>len</code> bytes in <code>input</code>, 0N/A * starting at <code>offset</code> inclusive. 0N/A * @param input the input buffer. 0N/A * @param offset the offset in <code>input</code> where the input starts. 0N/A * @param len the number of bytes to process. 0N/A * Processes <code>input.remaining()</code> bytes in the ByteBuffer 0N/A * <code>input</code>, starting at <code>input.position()</code>. 0N/A * Upon return, the buffer's position will be equal to its limit; 0N/A * its limit will not have changed. 0N/A * <p>Subclasses should consider overriding this method if they can 0N/A * process ByteBuffers more efficiently than byte arrays. 0N/A * @param input the ByteBuffer 0N/A * Completes the MAC computation and resets the MAC for further use, 0N/A * maintaining the secret key that the MAC was initialized with. 0N/A * @return the MAC result. 0N/A * Resets the MAC for further use, maintaining the secret key that the 0N/A * MAC was initialized with. 0N/A * Returns a clone if the implementation is cloneable. 0N/A * @return a clone if the implementation is cloneable. 0N/A * @exception CloneNotSupportedException if this is called 0N/A * on an implementation that does not support <code>Cloneable</code>.