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. 010 011 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 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 }