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/*
* reserved comment block
* DO NOT REMOVE OR ALTER!
*/
/*
* Copyright 1999-2004 The Apache Software Foundation.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package com.sun.org.apache.xml.internal.security.keys.content.keyvalues;
import java.math.BigInteger;
import java.security.Key;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import java.security.interfaces.DSAPublicKey;
import java.security.spec.DSAPublicKeySpec;
import java.security.spec.InvalidKeySpecException;
import com.sun.org.apache.xml.internal.security.exceptions.XMLSecurityException;
import com.sun.org.apache.xml.internal.security.utils.Constants;
import com.sun.org.apache.xml.internal.security.utils.I18n;
import com.sun.org.apache.xml.internal.security.utils.SignatureElementProxy;
import com.sun.org.apache.xml.internal.security.utils.XMLUtils;
import org.w3c.dom.Document;
import org.w3c.dom.Element;
/**
*
* @author $Author: raul $
*/
public class DSAKeyValue extends SignatureElementProxy
implements KeyValueContent {
/** {@link java.util.logging} logging facility */
static java.util.logging.Logger log =
java.util.logging.Logger.getLogger(DSAKeyValue.class.getName());
/**
* Constructor DSAKeyValue
*
* @param element
* @param BaseURI
* @throws XMLSecurityException
*/
public DSAKeyValue(Element element, String BaseURI)
throws XMLSecurityException {
super(element, BaseURI);
}
/**
* Constructor DSAKeyValue
*
* @param doc
* @param P
* @param Q
* @param G
* @param Y
*/
public DSAKeyValue(Document doc, BigInteger P, BigInteger Q, BigInteger G,
BigInteger Y) {
super(doc);
XMLUtils.addReturnToElement(this._constructionElement);
this.addBigIntegerElement(P, Constants._TAG_P);
this.addBigIntegerElement(Q, Constants._TAG_Q);
this.addBigIntegerElement(G, Constants._TAG_G);
this.addBigIntegerElement(Y, Constants._TAG_Y);
}
/**
* Constructor DSAKeyValue
*
* @param doc
* @param key
* @throws IllegalArgumentException
*/
public DSAKeyValue(Document doc, Key key) throws IllegalArgumentException {
super(doc);
XMLUtils.addReturnToElement(this._constructionElement);
if (key instanceof java.security.interfaces.DSAPublicKey) {
this.addBigIntegerElement(((DSAPublicKey) key).getParams().getP(),
Constants._TAG_P);
this.addBigIntegerElement(((DSAPublicKey) key).getParams().getQ(),
Constants._TAG_Q);
this.addBigIntegerElement(((DSAPublicKey) key).getParams().getG(),
Constants._TAG_G);
this.addBigIntegerElement(((DSAPublicKey) key).getY(),
Constants._TAG_Y);
} else {
Object exArgs[] = { Constants._TAG_DSAKEYVALUE,
key.getClass().getName() };
throw new IllegalArgumentException(I18n
.translate("KeyValue.IllegalArgument", exArgs));
}
}
/** @inheritDoc */
public PublicKey getPublicKey() throws XMLSecurityException {
try {
DSAPublicKeySpec pkspec =
new DSAPublicKeySpec(this
.getBigIntegerFromChildElement(Constants._TAG_Y, Constants
.SignatureSpecNS), this
.getBigIntegerFromChildElement(Constants._TAG_P, Constants
.SignatureSpecNS), this
.getBigIntegerFromChildElement(Constants._TAG_Q, Constants
.SignatureSpecNS), this
.getBigIntegerFromChildElement(Constants
._TAG_G, Constants.SignatureSpecNS));
KeyFactory dsaFactory = KeyFactory.getInstance("DSA");
PublicKey pk = dsaFactory.generatePublic(pkspec);
return pk;
} catch (NoSuchAlgorithmException ex) {
throw new XMLSecurityException("empty", ex);
} catch (InvalidKeySpecException ex) {
throw new XMLSecurityException("empty", ex);
}
}
/** @inheritDoc */
public String getBaseLocalName() {
return Constants._TAG_DSAKEYVALUE;
}
}
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