/*
* The Apache Software License, Version 1.1
*
*
* Copyright (c) 1999 The Apache Software Foundation. All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* 3. The end-user documentation included with the redistribution,
* if any, must include the following acknowledgment:
* "This product includes software developed by the
* Apache Software Foundation (http://www.apache.org/)."
* Alternately, this acknowledgment may appear in the software itself,
* if and wherever such third-party acknowledgments normally appear.
*
* 4. The names "<WebSig>" and "Apache Software Foundation" must
* not be used to endorse or promote products derived from this
* software without prior written permission. For written
* permission, please contact apache@apache.org.
*
* 5. Products derived from this software may not be called "Apache",
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* SUCH DAMAGE.
* ====================================================================
*
* This software consists of voluntary contributions made by many
* individuals on behalf of the Apache Software Foundation and was
* originally based on software copyright (c) 2001, Institute for
* Data Communications Systems, <http://www.nue.et-inf.uni-siegen.de/>.
* The development of this software was partly funded by the European
* Commission in the <WebSig> project in the ISIS Programme.
* For more information on the Apache Software Foundation, please see
* <http://www.apache.org/>.
*/
package org.apache.xml.security.keys.content.keyvalues;
import java.security.interfaces.DSAPublicKey;
import java.security.Key;
import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.KeySpec;
import java.security.spec.DSAPublicKeySpec;
import java.math.BigInteger;
import javax.xml.transform.TransformerException;
import org.apache.xpath.XPathAPI;
import org.w3c.dom.*;
import org.apache.xml.security.exceptions.XMLSecurityException;
import org.apache.xml.security.signature.XMLSignatureException;
import org.apache.xml.security.utils.*;
/**
*
* @author $Author: vdkoogh $
*/
public class DSAKeyValue extends SignatureElementProxy
implements KeyValueContent {
/** {@link org.apache.log4j} logging facility */
static org.apache.log4j.Category cat =
org.apache.log4j.Category.getInstance(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 (JavaUtils.implementsInterface(
(Object) key, "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));
}
}
/**
* Method getPublicKey
*
*
* @throws XMLSecurityException
*/
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);
}
}
public String getBaseLocalName() {
return Constants._TAG_DSAKEYVALUE;
}
}