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 * 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

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package com.sun.org.apache.xml.internal.security.keys.keyresolver.implementations;

import java.security.PrivateKey;

import java.security.PublicKey;

import java.security.cert.X509Certificate;

import javax.crypto.SecretKey;

import com.sun.org.apache.xml.internal.security.exceptions.XMLSecurityException;

import com.sun.org.apache.xml.internal.security.keys.content.DEREncodedKeyValue;

import com.sun.org.apache.xml.internal.security.keys.keyresolver.KeyResolverException;

import com.sun.org.apache.xml.internal.security.keys.keyresolver.KeyResolverSpi;

import com.sun.org.apache.xml.internal.security.keys.storage.StorageResolver;

import com.sun.org.apache.xml.internal.security.utils.Constants;

import com.sun.org.apache.xml.internal.security.utils.XMLUtils;

import org.w3c.dom.Element;

/**

 * KeyResolverSpi implementation which resolves public keys from a

 * {@code dsig11:DEREncodedKeyValue} element.

 *

 */

public class DEREncodedKeyValueResolver extends KeyResolverSpi {

    private static final com.sun.org.slf4j.internal.Logger LOG =

        com.sun.org.slf4j.internal.LoggerFactory.getLogger(DEREncodedKeyValueResolver.class);

    /** {{@inheritDoc}}. */

    public boolean engineCanResolve(Element element, String baseURI, StorageResolver storage) {

        return XMLUtils.elementIsInSignature11Space(element, Constants._TAG_DERENCODEDKEYVALUE);

    }

    /** {{@inheritDoc}}. */

    public PublicKey engineLookupAndResolvePublicKey(Element element, String baseURI, StorageResolver storage)

        throws KeyResolverException {

        LOG.debug("Can I resolve {}", element.getTagName());

        if (!engineCanResolve(element, baseURI, storage)) {

            return null;

        }

        try {

            DEREncodedKeyValue derKeyValue = new DEREncodedKeyValue(element, baseURI);

            return derKeyValue.getPublicKey();

        } catch (XMLSecurityException e) {

            LOG.debug("XMLSecurityException", e);

        }

        return null;

    }

    /** {{@inheritDoc}}. */

    public X509Certificate engineLookupResolveX509Certificate(Element element, String baseURI, StorageResolver storage)

        throws KeyResolverException {

        return null;

    }

    /** {{@inheritDoc}}. */

    public SecretKey engineLookupAndResolveSecretKey(Element element, String baseURI, StorageResolver storage)

        throws KeyResolverException {

        return null;

    }

    /** {{@inheritDoc}}. */

    public PrivateKey engineLookupAndResolvePrivateKey(Element element, String baseURI, StorageResolver storage)

        throws KeyResolverException {

        return null;

    }

}