73 lines
2.3 KiB
Java
73 lines
2.3 KiB
Java
/* 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.
|
|
|
|
As a special exception, if you link this library with other files to
|
|
produce an executable, this library does not by itself cause the
|
|
resulting executable to be covered by the GNU General Public License.
|
|
This exception does not however invalidate any other reasons why the
|
|
executable file might be covered by the GNU General Public License. */
|
|
|
|
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
|
|
{
|
|
/**
|
|
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);
|
|
}
|