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