libjava/classpath/gnu/java/security/jce/sig/DSSKeyPairGeneratorSpi.java

   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.crypto DSS keypair generator instances.<p>
  56  *
  57  * In case the client does not explicitly initialize the KeyPairGenerator (via
  58  * a call to an <code>initialize()</code> method), the GNU Crypto provider
  59  * uses a default <i>modulus</i> size (keysize) of 1024 bits.<p>
  60  */
  61 public class DSSKeyPairGeneratorSpi extends KeyPairGeneratorAdapter implements
  62     DSAKeyPairGenerator
  63 {
  64
  65   // Constants and variables
  66   // -------------------------------------------------------------------------
  67
  68   // Constructor(s)
  69   // -------------------------------------------------------------------------
  70
  71   public DSSKeyPairGeneratorSpi()
  72   {
  73     super(Registry.DSS_KPG);
  74   }
  75
  76   // Class methods
  77   // -------------------------------------------------------------------------
  78
  79   // Instance methods
  80   // -------------------------------------------------------------------------
  81
  82   public void initialize(int keysize, SecureRandom random)
  83   {
  84     this.initialize(keysize, false, random);
  85   }
  86
  87   public void initialize(AlgorithmParameterSpec params, SecureRandom random)
  88       throws InvalidAlgorithmParameterException
  89   {
  90     HashMap attributes = new HashMap();
  91     if (params != null)
  92       {
  93         if (!(params instanceof DSAParameterSpec))
  94           throw new InvalidAlgorithmParameterException(
  95               "Parameters argument is not a non-null instance, or " +
  96               "sub-instance, of java.security.spec.DSAParameterSpec");
  97
  98         attributes.put(DSSKeyPairGenerator.DSS_PARAMETERS, params);
  99       }
 100
 101     if (random != null)
 102       {
 103         attributes.put(DSSKeyPairGenerator.SOURCE_OF_RANDOMNESS, random);
 104       }
 105
 106     attributes.put(DSSKeyPairGenerator.PREFERRED_ENCODING_FORMAT,
 107                    new Integer(Registry.ASN1_ENCODING_ID));
 108     try
 109       {
 110         adaptee.setup(attributes);
 111       }
 112     catch (IllegalArgumentException x)
 113       {
 114         InvalidAlgorithmParameterException y =
 115             new InvalidAlgorithmParameterException();
 116         y.initCause(x);
 117         throw y;
 118       }
 119   }
 120
 121   // java.security.interfaces.DSAKeyPairGenerator interface implementation -----
 122
 123   public void initialize(DSAParams params, SecureRandom random)
 124       throws InvalidParameterException
 125   {
 126     if (params == null || !(params instanceof DSAParameterSpec))
 127       throw new InvalidParameterException(
 128           "Parameters argument is either null or is not an instance, or " +
 129           "sub-instance, of java.security.spec.DSAParameterSpec");
 130     DSAParameterSpec spec = (DSAParameterSpec) params;
 131     try
 132       {
 133         this.initialize((AlgorithmParameterSpec) spec, random);
 134       }
 135     catch (InvalidAlgorithmParameterException x)
 136       {
 137         InvalidParameterException y = new InvalidParameterException();
 138         y.initCause(x);
 139         throw y;
 140       }
 141   }
 142
 143   public void initialize(int modlen, boolean genParams, SecureRandom random)
 144       throws InvalidParameterException
 145   {
 146     HashMap attributes = new HashMap();
 147     attributes.put(DSSKeyPairGenerator.MODULUS_LENGTH, new Integer(modlen));
 148     if (random != null)
 149       attributes.put(DSSKeyPairGenerator.SOURCE_OF_RANDOMNESS, random);
 150
 151     attributes.put(DSSKeyPairGenerator.USE_DEFAULTS,
 152                    Boolean.valueOf(!genParams));
 153     attributes.put(DSSKeyPairGenerator.STRICT_DEFAULTS, Boolean.TRUE);
 154     attributes.put(DSSKeyPairGenerator.PREFERRED_ENCODING_FORMAT,
 155                    new Integer(Registry.ASN1_ENCODING_ID));
 156     try
 157       {
 158         adaptee.setup(attributes);
 159       }
 160     catch (IllegalArgumentException x)
 161       {
 162         InvalidParameterException y = new InvalidParameterException();
 163         y.initCause(x);
 164         throw y;
 165       }
 166   }
 167 }