001/* KeyPairGeneratorSpi.java --- Key Pair Generator SPI Class 002 Copyright (C) 1999, 2002 Free Software Foundation, Inc. 003 004This file is part of GNU Classpath. 005 006GNU Classpath is free software; you can redistribute it and/or modify 007it under the terms of the GNU General Public License as published by 008the Free Software Foundation; either version 2, or (at your option) 009any later version. 010 011GNU Classpath is distributed in the hope that it will be useful, but 012WITHOUT ANY WARRANTY; without even the implied warranty of 013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 014General Public License for more details. 015 016You should have received a copy of the GNU General Public License 017along with GNU Classpath; see the file COPYING. If not, write to the 018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 01902110-1301 USA. 020 021Linking this library statically or dynamically with other modules is 022making a combined work based on this library. Thus, the terms and 023conditions of the GNU General Public License cover the whole 024combination. 025 026As a special exception, the copyright holders of this library give you 027permission to link this library with independent modules to produce an 028executable, regardless of the license terms of these independent 029modules, and to copy and distribute the resulting executable under 030terms of your choice, provided that you also meet, for each linked 031independent module, the terms and conditions of the license of that 032module. An independent module is a module which is not derived from 033or based on this library. If you modify this library, you may extend 034this exception to your version of the library, but you are not 035obligated to do so. If you do not wish to do so, delete this 036exception statement from your version. */ 037 038package java.security; 039import 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 */ 047public 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}