| /* |
| * Copyright (c) 2002, 2013, 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 sun.security.provider; |
| |
| import java.io.IOException; |
| |
| /** |
| * Seed generator for Windows making use of MS CryptoAPI using native code. |
| * |
| */ |
| class NativeSeedGenerator extends SeedGenerator { |
| |
| /** |
| * Create a new CryptoAPI seed generator instances. |
| * |
| * @exception IOException if CryptoAPI seeds are not available |
| * on this platform. |
| */ |
| NativeSeedGenerator(String seedFile) throws IOException { |
| // seedFile is ignored. |
| super(); |
| // try generating two random bytes to see if CAPI is available |
| if (!nativeGenerateSeed(new byte[2])) { |
| throw new IOException("Required native CryptoAPI features not " |
| + " available on this machine"); |
| } |
| } |
| |
| /** |
| * Native method to do the actual work. |
| */ |
| private static native boolean nativeGenerateSeed(byte[] result); |
| |
| @Override |
| void getSeedBytes(byte[] result) { |
| // fill array as a side effect |
| if (nativeGenerateSeed(result) == false) { |
| // should never happen if constructor check succeeds |
| throw new InternalError |
| ("Unexpected CryptoAPI failure generating seed"); |
| } |
| } |
| |
| } |