/*
 * reserved comment block
 * DO NOT REMOVE OR ALTER!
 */
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
specific language governing permissions and limitations
under the License.
/**
 * 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
 * specific language governing permissions and limitations
 * under the License.
 */
package com.sun.org.apache.xml.internal.security.keys.content;

import java.security.KeyFactory;
import java.security.NoSuchAlgorithmException;
import java.security.PublicKey;
import java.security.spec.InvalidKeySpecException;
import java.security.spec.X509EncodedKeySpec;

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.Signature11ElementProxy;
import org.w3c.dom.Document;
import org.w3c.dom.Element;

Provides content model support for the dsig11:DEREncodedKeyvalue element. /**
 * Provides content model support for the {@code dsig11:DEREncodedKeyvalue} element.
 *
 */
public class DEREncodedKeyValue extends Signature11ElementProxy implements KeyInfoContent {

    
JCA algorithm key types supported by this implementation. /** JCA algorithm key types supported by this implementation. */
    private static final String supportedKeyTypes[] = { "RSA", "DSA", "EC"};

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

    
Constructor DEREncodedKeyValue
Params:
doc – 
publicKey – 
Throws:
XMLSecurityException – /**
     * Constructor DEREncodedKeyValue
     *
     * @param doc
     * @param publicKey
     * @throws XMLSecurityException
     */
    public DEREncodedKeyValue(Document doc, PublicKey publicKey) throws XMLSecurityException {
        super(doc);

        this.addBase64Text(getEncodedDER(publicKey));
    }

    
Constructor DEREncodedKeyValue
Params:
doc – 
encodedKey – /**
     * Constructor DEREncodedKeyValue
     *
     * @param doc
     * @param encodedKey
     */
    public DEREncodedKeyValue(Document doc, byte[] encodedKey) {
        super(doc);

        this.addBase64Text(encodedKey);
    }

    
Sets the Id attribute 
Params:
id – ID/**
     * Sets the {@code Id} attribute
     *
     * @param id ID
     */
    public void setId(String id) {
        setLocalIdAttribute(Constants._ATT_ID, id);
    }

    
Returns the Id attribute 
Returns:
the Id attribute/**
     * Returns the {@code Id} attribute
     *
     * @return the {@code Id} attribute
     */
    public String getId() {
        return getLocalAttribute(Constants._ATT_ID);
    }

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

    
Method getPublicKey
Throws:
XMLSecurityException – 
Returns:
the public key/**
     * Method getPublicKey
     *
     * @return the public key
     * @throws XMLSecurityException
     */
    public PublicKey getPublicKey() throws XMLSecurityException {
        byte[] encodedKey = getBytesFromTextChild();

        // Iterate over the supported key types until one produces a public key.
        for (String keyType : supportedKeyTypes) {
            try {
                KeyFactory keyFactory = KeyFactory.getInstance(keyType);
                X509EncodedKeySpec keySpec = new X509EncodedKeySpec(encodedKey);
                PublicKey publicKey = keyFactory.generatePublic(keySpec);
                if (publicKey != null) {
                    return publicKey;
                }
            } catch (NoSuchAlgorithmException e) { //NOPMD
                // Do nothing, try the next type
            } catch (InvalidKeySpecException e) { //NOPMD
                // Do nothing, try the next type
            }
        }
        throw new XMLSecurityException("DEREncodedKeyValue.UnsupportedEncodedKey");
    }

    
Method getEncodedDER
Throws:
XMLSecurityException – 
Returns:
the public key/**
     * Method getEncodedDER
     *
     * @return the public key
     * @throws XMLSecurityException
     */
    protected byte[] getEncodedDER(PublicKey publicKey) throws XMLSecurityException {
        try {
            KeyFactory keyFactory = KeyFactory.getInstance(publicKey.getAlgorithm());
            X509EncodedKeySpec keySpec = keyFactory.getKeySpec(publicKey, X509EncodedKeySpec.class);
            return keySpec.getEncoded();
        } catch (NoSuchAlgorithmException e) {
            Object exArgs[] = { publicKey.getAlgorithm(), publicKey.getFormat(), publicKey.getClass().getName() };
            throw new XMLSecurityException(e, "DEREncodedKeyValue.UnsupportedPublicKey", exArgs);
        } catch (InvalidKeySpecException e) {
            Object exArgs[] = { publicKey.getAlgorithm(), publicKey.getFormat(), publicKey.getClass().getName() };
            throw new XMLSecurityException(e, "DEREncodedKeyValue.UnsupportedPublicKey", exArgs);
        }
    }

}