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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 1999, Oracle and/or its affiliates. All rights reserved. | ||
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | ||
| 4 | * | ||
| 5 | * This code is free software; you can redistribute it and/or modify it | ||
| 6 | * under the terms of the GNU General Public License version 2 only, as | ||
| 7 | * published by the Free Software Foundation. Oracle designates this | ||
| 8 | * particular file as subject to the "Classpath" exception as provided | ||
| 9 | * by Oracle in the LICENSE file that accompanied this code. | ||
| 10 | * | ||
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT | ||
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | ||
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | ||
| 14 | * version 2 for more details (a copy is included in the LICENSE file that | ||
| 15 | * accompanied this code). | ||
| 16 | * | ||
| 17 | * You should have received a copy of the GNU General Public License version | ||
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, | ||
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | ||
| 20 | * | ||
| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | ||
| 22 | * or visit www.oracle.com if you need additional information or have any | ||
| 23 | * questions. | ||
| 24 | */ | ||
| 25 | |||
| 26 | package java.security; | ||
| 27 | |||
| 28 | import java.security.spec.AlgorithmParameterSpec; | ||
| 29 | |||
| 30 | /** | ||
| 31 | * This class defines the <i>Service Provider Interface</i> (<b>SPI</b>) | ||
| 32 | * for the <code>AlgorithmParameterGenerator</code> class, which | ||
| 33 | * is used to generate a set of parameters to be used with a certain algorithm. | ||
| 34 | * | ||
| 35 | * <p> All the abstract methods in this class must be implemented by each | ||
| 36 | * cryptographic service provider who wishes to supply the implementation | ||
| 37 | * of a parameter generator for a particular algorithm. | ||
| 38 | * | ||
| 39 | * <p> In case the client does not explicitly initialize the | ||
| 40 | * AlgorithmParameterGenerator (via a call to an <code>engineInit</code> | ||
| 41 | * method), each provider must supply (and document) a default initialization. | ||
| 42 | * For example, the Sun provider uses a default modulus prime size of 1024 | ||
| 43 | * bits for the generation of DSA parameters. | ||
| 44 | * | ||
| 45 | * @author Jan Luehe | ||
| 46 | * | ||
| 47 | * | ||
| 48 | * @see AlgorithmParameterGenerator | ||
| 49 | * @see AlgorithmParameters | ||
| 50 | * @see java.security.spec.AlgorithmParameterSpec | ||
| 51 | * | ||
| 52 | * @since 1.2 | ||
| 53 | */ | ||
| 54 | |||
| 55 | public abstract class AlgorithmParameterGeneratorSpi { | ||
| 56 | |||
| 57 | /** | ||
| 58 | * Initializes this parameter generator for a certain size | ||
| 59 | * and source of randomness. | ||
| 60 | * | ||
| 61 | * @param size the size (number of bits). | ||
| 62 | * @param random the source of randomness. | ||
| 63 | */ | ||
| 64 | protected abstract void engineInit(int size, SecureRandom random); | ||
| 65 | |||
| 66 | /** | ||
| 67 | * Initializes this parameter generator with a set of | ||
| 68 | * algorithm-specific parameter generation values. | ||
| 69 | * | ||
| 70 | * @param genParamSpec the set of algorithm-specific parameter generation values. | ||
| 71 | * @param random the source of randomness. | ||
| 72 | * | ||
| 73 | * @exception InvalidAlgorithmParameterException if the given parameter | ||
| 74 | * generation values are inappropriate for this parameter generator. | ||
| 75 | */ | ||
| 76 | protected abstract void engineInit(AlgorithmParameterSpec genParamSpec, | ||
| 77 | SecureRandom random) | ||
| 78 | throws InvalidAlgorithmParameterException; | ||
| 79 | |||
| 80 | /** | ||
| 81 | * Generates the parameters. | ||
| 82 | * | ||
| 83 | * @return the new AlgorithmParameters object. | ||
| 84 | */ | ||
| 85 | protected abstract AlgorithmParameters engineGenerateParameters(); | ||
| 86 | } | ||