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 }