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/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements. See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. The ASF licenses this file
 * to you 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
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package com.sun.org.apache.xml.internal.security.keys.content;

import java.security.PublicKey;

import com.sun.org.apache.xml.internal.security.exceptions.XMLSecurityException;
import com.sun.org.apache.xml.internal.security.keys.content.keyvalues.DSAKeyValue;
import com.sun.org.apache.xml.internal.security.keys.content.keyvalues.RSAKeyValue;
import com.sun.org.apache.xml.internal.security.utils.Constants;
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;

The KeyValue element contains a single public key that may be useful in
validating the signature. Structured formats for defining DSA (REQUIRED)
and RSA (RECOMMENDED) public keys are defined in Signature Algorithms
(section 6.4). The KeyValue element may include externally defined public
keys values represented as PCDATA or element types from an external
namespace.
/**
 * The KeyValue element contains a single public key that may be useful in
 * validating the signature. Structured formats for defining DSA (REQUIRED)
 * and RSA (RECOMMENDED) public keys are defined in Signature Algorithms
 * (section 6.4). The KeyValue element may include externally defined public
 * keys values represented as PCDATA or element types from an external
 * namespace.
 *
 */
public class KeyValue extends SignatureElementProxy implements KeyInfoContent {

    
Constructor KeyValue
Params:
doc – 
dsaKeyValue – /**
     * Constructor KeyValue
     *
     * @param doc
     * @param dsaKeyValue
     */
    public KeyValue(Document doc, DSAKeyValue dsaKeyValue) {
        super(doc);

        addReturnToSelf();
        appendSelf(dsaKeyValue);
        addReturnToSelf();
    }

    
Constructor KeyValue
Params:
doc – 
rsaKeyValue – /**
     * Constructor KeyValue
     *
     * @param doc
     * @param rsaKeyValue
     */
    public KeyValue(Document doc, RSAKeyValue rsaKeyValue) {
        super(doc);

        addReturnToSelf();
        appendSelf(rsaKeyValue);
        addReturnToSelf();
    }

    
Constructor KeyValue
Params:
doc – 
unknownKeyValue – /**
     * Constructor KeyValue
     *
     * @param doc
     * @param unknownKeyValue
     */
    public KeyValue(Document doc, Element unknownKeyValue) {
        super(doc);

        addReturnToSelf();
        appendSelf(unknownKeyValue);
        addReturnToSelf();
    }

    
Constructor KeyValue
Params:
doc – 
pk – /**
     * Constructor KeyValue
     *
     * @param doc
     * @param pk
     */
    public KeyValue(Document doc, PublicKey pk) {
        super(doc);

        addReturnToSelf();

        if (pk instanceof java.security.interfaces.DSAPublicKey) {
            DSAKeyValue dsa = new DSAKeyValue(getDocument(), pk);

            appendSelf(dsa);
            addReturnToSelf();
        } else if (pk instanceof java.security.interfaces.RSAPublicKey) {
            RSAKeyValue rsa = new RSAKeyValue(getDocument(), pk);

            appendSelf(rsa);
            addReturnToSelf();
        } else {
            String error = "The given PublicKey type " + pk + " is not supported. Only DSAPublicKey and "
                + "RSAPublicKey types are currently supported";
            throw new IllegalArgumentException(error);
        }
    }

    
Constructor KeyValue
Params:
element – 
baseURI – 
Throws:
XMLSecurityException – /**
     * Constructor KeyValue
     *
     * @param element
     * @param baseURI
     * @throws XMLSecurityException
     */
    public KeyValue(Element element, String baseURI) throws XMLSecurityException {
        super(element, baseURI);
    }

    
Method getPublicKey
Throws:
XMLSecurityException – 
Returns:
the public key/**
     * Method getPublicKey
     *
     * @return the public key
     * @throws XMLSecurityException
     */
    public PublicKey getPublicKey() throws XMLSecurityException {
        Element rsa =
            XMLUtils.selectDsNode(
                getFirstChild(), Constants._TAG_RSAKEYVALUE, 0);

        if (rsa != null) {
            RSAKeyValue kv = new RSAKeyValue(rsa, this.baseURI);
            return kv.getPublicKey();
        }

        Element dsa =
            XMLUtils.selectDsNode(
                getFirstChild(), Constants._TAG_DSAKEYVALUE, 0);

        if (dsa != null) {
            DSAKeyValue kv = new DSAKeyValue(dsa, this.baseURI);
            return kv.getPublicKey();
        }

        return null;
    }

    
{@inheritDoc} /** {@inheritDoc} */
    public String getBaseLocalName() {
        return Constants._TAG_KEYVALUE;
    }
}