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jeremybenn |
/* DSSKeyPairGeneratorSpi.java --
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Copyright 2001, 2002, 2006 Free Software Foundation, Inc.
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This file is a part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at
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your option) any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
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USA
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.security.jce.sig;
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import gnu.java.security.Registry;
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import gnu.java.security.key.dss.DSSKeyPairGenerator;
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import java.security.InvalidAlgorithmParameterException;
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import java.security.InvalidParameterException;
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import java.security.SecureRandom;
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import java.security.interfaces.DSAKeyPairGenerator;
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import java.security.interfaces.DSAParams;
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import java.security.spec.AlgorithmParameterSpec;
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import java.security.spec.DSAParameterSpec;
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import java.util.HashMap;
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/**
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* The implementation of a {@link java.security.KeyPairGenerator} adapter class
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* to wrap GNU DSS keypair generator instances.
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* <p>
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* In case the client does not explicitly initialize the KeyPairGenerator (via a
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* call to an <code>initialize()</code> method), the GNU provider uses a
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* default <i>modulus</i> size (keysize) of 1024 bits.
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*/
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public class DSSKeyPairGeneratorSpi
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extends KeyPairGeneratorAdapter
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implements DSAKeyPairGenerator
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{
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public DSSKeyPairGeneratorSpi()
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{
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super(Registry.DSS_KPG);
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}
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public void initialize(int keysize, SecureRandom random)
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{
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this.initialize(keysize, false, random);
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}
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public void initialize(AlgorithmParameterSpec params, SecureRandom random)
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throws InvalidAlgorithmParameterException
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{
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HashMap attributes = new HashMap();
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if (params != null)
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{
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if (! (params instanceof DSAParameterSpec))
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throw new InvalidAlgorithmParameterException(
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"Parameters argument is not a non-null instance, or "
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+ "sub-instance, of java.security.spec.DSAParameterSpec");
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attributes.put(DSSKeyPairGenerator.DSS_PARAMETERS, params);
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}
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if (random != null)
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attributes.put(DSSKeyPairGenerator.SOURCE_OF_RANDOMNESS, random);
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attributes.put(DSSKeyPairGenerator.PREFERRED_ENCODING_FORMAT,
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Integer.valueOf(Registry.ASN1_ENCODING_ID));
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try
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{
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adaptee.setup(attributes);
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}
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catch (IllegalArgumentException x)
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{
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throw new InvalidAlgorithmParameterException(x.getMessage(), x);
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}
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}
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public void initialize(DSAParams params, SecureRandom random)
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throws InvalidParameterException
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{
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if (params == null || !(params instanceof DSAParameterSpec))
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throw new InvalidParameterException(
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"Parameters argument is either null or is not an instance, or "
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+ "sub-instance, of java.security.spec.DSAParameterSpec");
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DSAParameterSpec spec = (DSAParameterSpec) params;
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try
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{
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this.initialize((AlgorithmParameterSpec) spec, random);
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}
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catch (InvalidAlgorithmParameterException x)
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{
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InvalidParameterException y = new InvalidParameterException(x.getMessage());
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y.initCause(x);
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throw y;
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}
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}
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public void initialize(int modlen, boolean genParams, SecureRandom random)
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throws InvalidParameterException
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{
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HashMap attributes = new HashMap();
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attributes.put(DSSKeyPairGenerator.MODULUS_LENGTH, Integer.valueOf(modlen));
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if (random != null)
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attributes.put(DSSKeyPairGenerator.SOURCE_OF_RANDOMNESS, random);
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attributes.put(DSSKeyPairGenerator.USE_DEFAULTS,
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Boolean.valueOf(! genParams));
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attributes.put(DSSKeyPairGenerator.STRICT_DEFAULTS, Boolean.TRUE);
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attributes.put(DSSKeyPairGenerator.PREFERRED_ENCODING_FORMAT,
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Integer.valueOf(Registry.ASN1_ENCODING_ID));
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try
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{
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adaptee.setup(attributes);
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}
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catch (IllegalArgumentException x)
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{
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InvalidParameterException y = new InvalidParameterException(x.getMessage());
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y.initCause(x);
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throw y;
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}
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}
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}
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