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jeremybenn |
/* SecureRandomSpi.java --- Secure Random Service Provider Interface
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Copyright (C) 1999, 2005 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package java.security;
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import java.io.Serializable;
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/**
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SecureRandomSpi is the Service Provider Interface for SecureRandom
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providers. It provides an interface for providers to the
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SecureRandom engine to write their own pseudo-random number
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generator.
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@since JDK 1.2
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@author Mark Benvenuto (ivymccough@worldnet.att.net)
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*/
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public abstract class SecureRandomSpi implements Serializable
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{
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private static final long serialVersionUID = -2991854161009191830L;
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/**
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Default Constructor for SecureRandomSpi
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*/
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public SecureRandomSpi()
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{
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}
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/**
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Updates the seed for SecureRandomSpi but does not reset seed.
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It does to this so repeated called never decrease randomness.
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*/
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protected abstract void engineSetSeed(byte[] seed);
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/**
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Gets a user specified number of bytes depending on the length
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of the array?
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@param bytes array to fill with random bytes
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*/
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protected abstract void engineNextBytes(byte[] bytes);
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/**
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Gets a user specified number of bytes specified by the
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parameter.
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@param numBytes number of random bytes to generate
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@return an array full of random bytes
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*/
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protected abstract byte[] engineGenerateSeed(int numBytes);
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}
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