86 lines
3.0 KiB
Java
86 lines
3.0 KiB
Java
/* SecureRandomSpi.java --- Secure Random Service Provider Interface
|
|
Copyright (C) 1999, 2005 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., 51 Franklin Street, 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 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
|
|
{
|
|
private 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);
|
|
}
|