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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: */ 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: */ 83: void initialize (int modlen, boolean genParams, SecureRandom random) 84: throws InvalidParameterException; 85: }