001    /* AlgorithmParameterGeneratorSpi.java --- Algorithm Parameter Generator SPI
002       Copyright (C) 1999 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    package java.security;
039    import java.security.spec.AlgorithmParameterSpec;
040    
041    /**
042       AlgorithmParameterGeneratorSpi is the Service Provider 
043       Interface for the AlgorithmParameterGenerator class. 
044       This class is used to generate the algorithm parameters
045       for a specific algorithm.
046    
047       @since JDK 1.2
048       @author Mark Benvenuto
049     */
050    public abstract class AlgorithmParameterGeneratorSpi
051    {
052    
053      /**
054         Constructs a new AlgorithmParameterGeneratorSpi
055       */
056      public AlgorithmParameterGeneratorSpi()
057      {
058      }
059    
060      /**
061         Initializes the parameter generator with the specified size
062         and SecureRandom
063    
064         @param size the size( in number of bits) 
065         @param random the SecureRandom class to use for randomness
066       */
067      protected abstract void engineInit(int size, SecureRandom random);
068    
069      /**
070         Initializes the parameter generator with the specified
071         AlgorithmParameterSpec and SecureRandom classes.
072    
073         If genParamSpec is an invalid AlgorithmParameterSpec for this
074         AlgorithmParameterGeneratorSpi then it throws
075         InvalidAlgorithmParameterException
076    
077         @param genParamSpec the AlgorithmParameterSpec class to use
078         @param random the SecureRandom class to use for randomness
079    
080         @throws InvalidAlgorithmParameterException genParamSpec is invalid
081       */
082      protected abstract void engineInit(AlgorithmParameterSpec genParamSpec,
083                                         SecureRandom random) throws
084        InvalidAlgorithmParameterException;
085    
086    
087      /**
088         Generate a new set of AlgorithmParameters.
089    
090         @returns a new set of algorithm parameters
091       */
092      protected abstract AlgorithmParameters engineGenerateParameters();
093    
094    }