| /* FortunaImpl.java -- Fortuna SecureRandom adapter. |
| Copyright (C) 2006 Free Software Foundation, Inc. |
| |
| This file is a part of GNU Classpath. |
| |
| GNU Classpath is free software; you can redistribute it and/or modify |
| it under the terms of the GNU General Public License as published by |
| the Free Software Foundation; either version 2 of the License, or (at |
| your option) any later version. |
| |
| GNU Classpath 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GNU Classpath; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 |
| USA |
| |
| Linking this library statically or dynamically with other modules is |
| making a combined work based on this library. Thus, the terms and |
| conditions of the GNU General Public License cover the whole |
| combination. |
| |
| As a special exception, the copyright holders of this library give you |
| permission to link this library with independent modules to produce an |
| executable, regardless of the license terms of these independent |
| modules, and to copy and distribute the resulting executable under |
| terms of your choice, provided that you also meet, for each linked |
| independent module, the terms and conditions of the license of that |
| module. An independent module is a module which is not derived from |
| or based on this library. If you modify this library, you may extend |
| this exception to your version of the library, but you are not |
| obligated to do so. If you do not wish to do so, delete this |
| exception statement from your version. */ |
| |
| |
| package gnu.javax.crypto.jce.prng; |
| |
| import gnu.java.security.prng.LimitReachedException; |
| import gnu.javax.crypto.prng.Fortuna; |
| |
| import java.security.SecureRandomSpi; |
| import java.util.Collections; |
| |
| public final class FortunaImpl |
| extends SecureRandomSpi |
| { |
| private final Fortuna adaptee; |
| |
| public FortunaImpl() |
| { |
| adaptee = new Fortuna(); |
| adaptee.init(Collections.singletonMap(Fortuna.SEED, new byte[0])); |
| } |
| |
| protected void engineSetSeed(byte[] seed) |
| { |
| synchronized (adaptee) |
| { |
| adaptee.addRandomBytes(seed); |
| } |
| } |
| |
| protected void engineNextBytes(byte[] buffer) |
| { |
| synchronized (adaptee) |
| { |
| try |
| { |
| adaptee.nextBytes(buffer); |
| } |
| catch (LimitReachedException shouldNotHappen) |
| { |
| throw new Error(shouldNotHappen); |
| } |
| } |
| } |
| |
| protected byte[] engineGenerateSeed(int numbytes) |
| { |
| byte[] seed = new byte[numbytes]; |
| engineNextBytes(seed); |
| return seed; |
| } |
| } |