1 /* DSSKeyPairGeneratorSpi.java -- 2 Copyright 2001, 2002, 2006 Free Software Foundation, Inc. 3 4 This file is a 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 of the License, or (at 9 your option) 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; if not, write to the Free Software 18 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 19 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 39 package gnu.java.security.jce.sig; 40 41 import gnu.java.security.Registry; 42 import gnu.java.security.key.dss.DSSKeyPairGenerator; 43 44 import java.security.InvalidAlgorithmParameterException; 45 import java.security.InvalidParameterException; 46 import java.security.SecureRandom; 47 import java.security.interfaces.DSAKeyPairGenerator; 48 import java.security.interfaces.DSAParams; 49 import java.security.spec.AlgorithmParameterSpec; 50 import java.security.spec.DSAParameterSpec; 51 import java.util.HashMap; 52 53 /** 54 * The implementation of a {@link java.security.KeyPairGenerator} adapter class 55 * to wrap GNU DSS keypair generator instances. 56 * <p> 57 * In case the client does not explicitly initialize the KeyPairGenerator (via a 58 * call to an <code>initialize()</code> method), the GNU provider uses a 59 * default <i>modulus</i> size (keysize) of 1024 bits. 60 */ 61 public class DSSKeyPairGeneratorSpi 62 extends KeyPairGeneratorAdapter 63 implements DSAKeyPairGenerator 64 { DSSKeyPairGeneratorSpi()65 public DSSKeyPairGeneratorSpi() 66 { 67 super(Registry.DSS_KPG); 68 } 69 initialize(int keysize, SecureRandom random)70 public void initialize(int keysize, SecureRandom random) 71 { 72 this.initialize(keysize, false, random); 73 } 74 initialize(AlgorithmParameterSpec params, SecureRandom random)75 public void initialize(AlgorithmParameterSpec params, SecureRandom random) 76 throws InvalidAlgorithmParameterException 77 { 78 HashMap attributes = new HashMap(); 79 if (params != null) 80 { 81 if (! (params instanceof DSAParameterSpec)) 82 throw new InvalidAlgorithmParameterException( 83 "Parameters argument is not a non-null instance, or " 84 + "sub-instance, of java.security.spec.DSAParameterSpec"); 85 attributes.put(DSSKeyPairGenerator.DSS_PARAMETERS, params); 86 } 87 if (random != null) 88 attributes.put(DSSKeyPairGenerator.SOURCE_OF_RANDOMNESS, random); 89 90 attributes.put(DSSKeyPairGenerator.PREFERRED_ENCODING_FORMAT, 91 Integer.valueOf(Registry.ASN1_ENCODING_ID)); 92 try 93 { 94 adaptee.setup(attributes); 95 } 96 catch (IllegalArgumentException x) 97 { 98 throw new InvalidAlgorithmParameterException(x.getMessage(), x); 99 } 100 } 101 initialize(DSAParams params, SecureRandom random)102 public void initialize(DSAParams params, SecureRandom random) 103 throws InvalidParameterException 104 { 105 if (params == null || !(params instanceof DSAParameterSpec)) 106 throw new InvalidParameterException( 107 "Parameters argument is either null or is not an instance, or " 108 + "sub-instance, of java.security.spec.DSAParameterSpec"); 109 DSAParameterSpec spec = (DSAParameterSpec) params; 110 try 111 { 112 this.initialize((AlgorithmParameterSpec) spec, random); 113 } 114 catch (InvalidAlgorithmParameterException x) 115 { 116 InvalidParameterException y = new InvalidParameterException(x.getMessage()); 117 y.initCause(x); 118 throw y; 119 } 120 } 121 initialize(int modlen, boolean genParams, SecureRandom random)122 public void initialize(int modlen, boolean genParams, SecureRandom random) 123 throws InvalidParameterException 124 { 125 HashMap attributes = new HashMap(); 126 attributes.put(DSSKeyPairGenerator.MODULUS_LENGTH, Integer.valueOf(modlen)); 127 if (random != null) 128 attributes.put(DSSKeyPairGenerator.SOURCE_OF_RANDOMNESS, random); 129 130 attributes.put(DSSKeyPairGenerator.USE_DEFAULTS, 131 Boolean.valueOf(! genParams)); 132 attributes.put(DSSKeyPairGenerator.STRICT_DEFAULTS, Boolean.TRUE); 133 attributes.put(DSSKeyPairGenerator.PREFERRED_ENCODING_FORMAT, 134 Integer.valueOf(Registry.ASN1_ENCODING_ID)); 135 try 136 { 137 adaptee.setup(attributes); 138 } 139 catch (IllegalArgumentException x) 140 { 141 InvalidParameterException y = new InvalidParameterException(x.getMessage()); 142 y.initCause(x); 143 throw y; 144 } 145 } 146 } 147