Class SecureRandomAdapter

Implemented Interfaces:
Known Direct Subclasses:
HavalRandomSpi, MD2RandomSpi, MD4RandomSpi, MD5RandomSpi, RipeMD128RandomSpi, RipeMD160RandomSpi, Sha160RandomSpi, Sha256RandomSpi, Sha384RandomSpi, Sha512RandomSpi, TigerRandomSpi, WhirlpoolRandomSpi

public abstract class SecureRandomAdapter
extends SecureRandomSpi

The implementation of a generic SecureRandom adapter class to wrap gnu.crypto prng instances based on Message Digest algorithms.

This class defines the Service Provider Interface (SPI) for the SecureRandom class, which provides the functionality of a cryptographically strong pseudo-random number generator.

All the abstract methods in the SecureRandomSpi class are implemented by this class and all its sub-classes.

See Also:
Serialized Form

Constructor Summary

SecureRandomAdapter(String mdName)
Trivial protected constructor.

Method Summary

engineGenerateSeed(int numBytes)
engineNextBytes(byte[] bytes)
engineSetSeed(byte[] seed)
static byte[]
getSeed(int numBytes)

Methods inherited from class

engineGenerateSeed, engineNextBytes, engineSetSeed

Methods inherited from class java.lang.Object

clone, equals, extends Object> getClass, finalize, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details


protected SecureRandomAdapter(String mdName)
Trivial protected constructor.
mdName - the canonical name of the underlying hash algorithm.

Method Details


public byte[] engineGenerateSeed(int numBytes)
engineGenerateSeed in interface SecureRandomSpi


public void engineNextBytes(byte[] bytes)
engineNextBytes in interface SecureRandomSpi


public void engineSetSeed(byte[] seed)
engineSetSeed in interface SecureRandomSpi


public static final byte[] getSeed(int numBytes) -- Copyright (C) 2001, 2002, 2003, 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.