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73 lines
2.3 KiB
Java
73 lines
2.3 KiB
Java
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/* SecureRandomSpi.java --- Secure Random Service Provider Interface
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Copyright (C) 1999 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., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA.
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As a special exception, if you link this library with other files to
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produce an executable, this library does not by itself cause the
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resulting executable to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why the
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executable file might be covered by the GNU General Public License. */
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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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/**
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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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