org.apache.xml.security.keys.keyresolver.implementations.X509CertificateResolver Maven / Gradle / Ivy

Show more of this group Show more artifacts with this name
Show all versions of xmlsec Show documentation

Apache XML Security for Java supports XML-Signature Syntax and Processing, W3C Recommendation 12 February 2002, and XML Encryption Syntax and Processing, W3C Recommendation 10 December 2002. As of version 1.4, the library supports the standard Java API JSR-105: XML Digital Signature APIs.

There is a newer version: 4.0.2

Show newest version

/**
 * 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 org.apache.xml.security.keys.keyresolver.implementations;

import java.security.PublicKey;
import java.security.cert.X509Certificate;

import org.apache.xml.security.exceptions.XMLSecurityException;
import org.apache.xml.security.keys.content.x509.XMLX509Certificate;
import org.apache.xml.security.keys.keyresolver.KeyResolverException;
import org.apache.xml.security.keys.keyresolver.KeyResolverSpi;
import org.apache.xml.security.keys.storage.StorageResolver;
import org.apache.xml.security.utils.Constants;
import org.apache.xml.security.utils.XMLUtils;
import org.w3c.dom.Element;

/**
 * Resolves Certificates which are directly contained inside a
 * ds:X509Certificate Element.
 *
 * @author $Author: coheigea $
 */
public class X509CertificateResolver extends KeyResolverSpi {

    private static org.slf4j.Logger log =
        org.slf4j.LoggerFactory.getLogger(X509CertificateResolver.class);

    /**
     * Method engineResolvePublicKey
     * @inheritDoc
     * @param element
     * @param baseURI
     * @param storage
     *
     * @throws KeyResolverException
     */
    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;
    }

    /**
     * Method engineResolveX509Certificate
     * @inheritDoc
     * @param element
     * @param baseURI
     * @param storage
     *
     * @throws KeyResolverException
     */
    public X509Certificate engineLookupResolveX509Certificate(
        Element element, String baseURI, StorageResolver storage
    ) throws KeyResolverException {

        try {
            Element[] els = 
                XMLUtils.selectDsNodes(element.getFirstChild(), Constants._TAG_X509CERTIFICATE);
            if (els == null || els.length == 0) {  
                Element el =
                    XMLUtils.selectDsNode(element.getFirstChild(), Constants._TAG_X509DATA, 0);
                if (el != null) {
                    return engineLookupResolveX509Certificate(el, baseURI, storage);
                }        	 
                return null;            
            }

            // populate Object array
            for (int i = 0; i < els.length; i++) {
                XMLX509Certificate xmlCert = new XMLX509Certificate(els[i], baseURI);
                X509Certificate cert = xmlCert.getX509Certificate();
                if (cert != null) {
                    return cert;
                }
            }
            return null;
        } catch (XMLSecurityException ex) {
            if (log.isDebugEnabled()) {
                log.debug("XMLSecurityException", ex);
            }
            throw new KeyResolverException(ex);
        }
    }

    /**
     * Method engineResolveSecretKey
     * @inheritDoc
     * @param element
     * @param baseURI
     * @param storage
     */
    public javax.crypto.SecretKey engineLookupAndResolveSecretKey(
        Element element, String baseURI, StorageResolver storage
    ) {
        return null;
    }
}