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- /* SecureRandomSpi.java --- Secure Random Service Provider Interface
- Copyright (C) 1999 Free Software Foundation, Inc.
- This file is 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, 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; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 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 java.security;
- import java.io.Serializable;
- /**
- SecureRandomSpi is the Service Provider Interface for SecureRandom
- providers. It provides an interface for providers to the
- SecureRandom engine to write their own pseudo-random number
- generator.
- @since JDK 1.2
- @author Mark Benvenuto <ivymccough@worldnet.att.net>
- */
- public abstract class SecureRandomSpi implements Serializable
- {
- static final long serialVersionUID = -2991854161009191830L;
- /**
- Default Constructor for SecureRandomSpi
- */
- public SecureRandomSpi()
- {
- }
- /**
- Updates the seed for SecureRandomSpi but does not reset seed.
- It does to this so repeated called never decrease randomness.
- */
- protected abstract void engineSetSeed(byte[] seed);
- /**
- Gets a user specified number of bytes depending on the length
- of the array?
- @param bytes array to fill with random bytes
- */
- protected abstract void engineNextBytes(byte[] bytes);
- /**
- Gets a user specified number of bytes specified by the
- parameter.
- @param numBytes number of random bytes to generate
- @return an array full of random bytes
- */
- protected abstract byte[] engineGenerateSeed(int numBytes);
- }
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