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 * DO NOT REMOVE OR ALTER!

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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

 * specific language governing permissions and limitations

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

import java.security.PublicKey;

import java.security.cert.Certificate;

import java.security.cert.X509Certificate;

import java.util.Iterator;

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

import com.sun.org.apache.xml.internal.security.keys.content.X509Data;

import com.sun.org.apache.xml.internal.security.keys.content.x509.XMLX509IssuerSerial;

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.signature.XMLSignatureException;

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

import org.w3c.dom.Element;

public class X509IssuerSerialResolver extends KeyResolverSpi {

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

        com.sun.org.slf4j.internal.LoggerFactory.getLogger(X509IssuerSerialResolver.class);

    /** {@inheritDoc} */

    public PublicKey engineLookupAndResolvePublicKey(

        Element element, String baseURI, StorageResolver storage

    ) throws KeyResolverException {

        X509Certificate cert =

            this.engineLookupResolveX509Certificate(element, baseURI, storage);

        if (cert != null) {

            return cert.getPublicKey();

        }

        return null;

    }

    /** {@inheritDoc} */

    public X509Certificate engineLookupResolveX509Certificate(

        Element element, String baseURI, StorageResolver storage

    ) throws KeyResolverException {

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

        X509Data x509data = null;

        try {

            x509data = new X509Data(element, baseURI);

        } catch (XMLSignatureException ex) {

            LOG.debug("I can't");

            return null;

        } catch (XMLSecurityException ex) {

            LOG.debug("I can't");

            return null;

        }

        if (!x509data.containsIssuerSerial()) {

            return null;

        }

        try {

            if (storage == null) {

                Object exArgs[] = { Constants._TAG_X509ISSUERSERIAL };

                KeyResolverException ex =

                    new KeyResolverException("KeyResolver.needStorageResolver", exArgs);

                LOG.debug("", ex);

                throw ex;

            }

            int noOfISS = x509data.lengthIssuerSerial();

            Iterator<Certificate> storageIterator = storage.getIterator();

            while (storageIterator.hasNext()) {

                X509Certificate cert = (X509Certificate)storageIterator.next();

                XMLX509IssuerSerial certSerial = new XMLX509IssuerSerial(element.getOwnerDocument(), cert);

                LOG.debug("Found Certificate Issuer: {}", certSerial.getIssuerName());

                LOG.debug("Found Certificate Serial: {}", certSerial.getSerialNumber().toString());

                for (int i = 0; i < noOfISS; i++) {

                    XMLX509IssuerSerial xmliss = x509data.itemIssuerSerial(i);

                    LOG.debug("Found Element Issuer:     {}", xmliss.getIssuerName());

                    LOG.debug("Found Element Serial:     {}", xmliss.getSerialNumber().toString());

                    if (certSerial.equals(xmliss)) {

                        LOG.debug("match !!! ");

                        return cert;

                    }

                    LOG.debug("no match...");

                }

            }

            return null;

        } catch (XMLSecurityException ex) {

            LOG.debug("XMLSecurityException", ex);

            throw new KeyResolverException(ex);

        }

    }

    /** {@inheritDoc} */

    public javax.crypto.SecretKey engineLookupAndResolveSecretKey(

        Element element, String baseURI, StorageResolver storage

    ) {

        return null;

    }

}