2362N/A * Copyright (c) 2003, 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 * Collection of static utility methods used by the security framework. 0N/A * @author Andreas Sterbenz 0N/A // lock to use for synchronization 0N/A // cached SecureRandom instance 0N/A // size of the temporary arrays we use. Should fit into the CPU's 1st 0N/A // level cache and could be adjusted based on the platform 0N/A * Get the size of a temporary buffer array to use in order to be 0N/A * cache efficient. totalSize indicates the total amount of data to 0N/A * be buffered. Used by the engineUpdate(ByteBuffer) methods. 0N/A * Get a SecureRandom instance. This method should me used by JDK 0N/A * internal code in favor of calling "new SecureRandom()". That needs to 0N/A * iterate through the provider table to find the default SecureRandom 0N/A * implementation, which is fairly inefficient. 0N/A // we use double checked locking to minimize synchronization 0N/A // works because we use a volatile reference