/*
* 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.
*
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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
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