1 /* DSAKeyPairGenerator.java -- Initialize a DSA key generator 2 Copyright (C) 1998, 2004 Free Software Foundation, Inc. 3 4 This file is part of GNU Classpath. 5 6 GNU Classpath is free software; you can redistribute it and/or modify 7 it under the terms of the GNU General Public License as published by 8 the Free Software Foundation; either version 2, or (at your option) 9 any later version. 10 11 GNU Classpath is distributed in the hope that it will be useful, but 12 WITHOUT ANY WARRANTY; without even the implied warranty of 13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 General Public License for more details. 15 16 You should have received a copy of the GNU General Public License 17 along with GNU Classpath; see the file COPYING. If not, write to the 18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 19 02110-1301 USA. 20 21 Linking this library statically or dynamically with other modules is 22 making a combined work based on this library. Thus, the terms and 23 conditions of the GNU General Public License cover the whole 24 combination. 25 26 As a special exception, the copyright holders of this library give you 27 permission to link this library with independent modules to produce an 28 executable, regardless of the license terms of these independent 29 modules, and to copy and distribute the resulting executable under 30 terms of your choice, provided that you also meet, for each linked 31 independent module, the terms and conditions of the license of that 32 module. An independent module is a module which is not derived from 33 or based on this library. If you modify this library, you may extend 34 this exception to your version of the library, but you are not 35 obligated to do so. If you do not wish to do so, delete this 36 exception statement from your version. */ 37 38 package java.security.interfaces; 39 40 import java.security.InvalidParameterException; 41 import java.security.SecureRandom; 42 43 /** 44 * This interface contains methods for intializing a Digital Signature 45 * Algorithm key generation engine. The initialize methods may be called 46 * any number of times. If no explicity initialization call is made, then 47 * the engine defaults to generating 1024-bit keys using pre-calculated 48 * base, prime, and subprime values. 49 * 50 * @version 0.0 51 * 52 * @author Aaron M. Renn (arenn@urbanophile.com) 53 */ 54 public interface DSAKeyPairGenerator 55 { 56 /** 57 * Initializes the key generator with the specified DSA parameters and 58 * random bit source 59 * 60 * @param params The DSA parameters to use 61 * @param random The random bit source to use 62 * 63 * @exception InvalidParameterException If the parameters passed are not valid 64 */ initialize(DSAParams params, SecureRandom random)65 void initialize (DSAParams params, SecureRandom random) 66 throws InvalidParameterException; 67 68 /** 69 * Initializes the key generator to a give modulus. If the <code>genParams</code> 70 * value is <code>true</code> then new base, prime, and subprime values 71 * will be generated for the given modulus. If not, the pre-calculated 72 * values will be used. If no pre-calculated values exist for the specified 73 * modulus, an exception will be thrown. It is guaranteed that there will 74 * always be pre-calculated values for all modulus values between 512 and 75 * 1024 bits inclusives. 76 * 77 * @param modlen The modulus length 78 * @param genParams <code>true</code> to generate new DSA parameters, <code>false</code> otherwise 79 * @param random The random bit source to use 80 * 81 * @exception InvalidParameterException If a parameter is invalid 82 */ initialize(int modlen, boolean genParams, SecureRandom random)83 void initialize (int modlen, boolean genParams, SecureRandom random) 84 throws InvalidParameterException; 85 } 86