001 /* KeyPairGeneratorSpi.java --- Key Pair Generator SPI Class
002 Copyright (C) 1999, 2002 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
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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
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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
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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 KeyPairGeneratorSpi is the interface used to generate key pairs
043 for security algorithms.
044
045 @author Mark Benvenuto
046 */
047 public abstract class KeyPairGeneratorSpi
048 {
049 /**
050 Constructs a new KeyPairGeneratorSpi
051 */
052 public KeyPairGeneratorSpi()
053 {
054 }
055
056 /**
057 Initialize the KeyPairGeneratorSpi with the specified
058 key size and source of randomness
059
060 @param keysize size of the key to generate
061 @param random A SecureRandom source of randomness
062 */
063 public abstract void initialize(int keysize, SecureRandom random);
064
065 /**
066 Initialize the KeyPairGeneratorSpi with the specified
067 AlgorithmParameterSpec and source of randomness
068
069 This is a concrete method. It may be overridden by the provider
070 and if the AlgorithmParameterSpec class is invalid
071 throw InvalidAlgorithmParameterException. By default this
072 method just throws UnsupportedOperationException.
073
074 @param params A AlgorithmParameterSpec to intialize with
075 @param random A SecureRandom source of randomness
076
077 @throws InvalidAlgorithmParameterException
078 */
079 public void initialize(AlgorithmParameterSpec params, SecureRandom random)
080 throws InvalidAlgorithmParameterException
081 {
082 throw new java.lang.UnsupportedOperationException();
083 }
084
085 /**
086 Generates a KeyPair according the rules for the algorithm.
087 Unless intialized, algorithm defaults will be used. It
088 creates a unique key pair each time.
089
090 @return a key pair
091 */
092 public abstract KeyPair generateKeyPair();
093
094 /**
095 * We override clone here to make it accessible for use by
096 * DummyKeyPairGenerator.
097 */
098 protected Object clone() throws CloneNotSupportedException
099 {
100 return super.clone();
101 }
102 }