eu.europa.esig.dss.xades.validation.XAdESCertificateSource Maven / Gradle / Ivy
/**
* DSS - Digital Signature Services
* Copyright (C) 2015 European Commission, provided under the CEF programme
*
* This file is part of the "DSS - Digital Signature Services" project.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
package eu.europa.esig.dss.xades.validation;
import java.util.ArrayList;
import java.util.List;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import eu.europa.esig.dss.DSSException;
import eu.europa.esig.dss.DSSUtils;
import eu.europa.esig.dss.DomUtils;
import eu.europa.esig.dss.utils.Utils;
import eu.europa.esig.dss.x509.CertificatePool;
import eu.europa.esig.dss.x509.CertificateToken;
import eu.europa.esig.dss.x509.SignatureCertificateSource;
import eu.europa.esig.dss.xades.DSSXMLUtils;
import eu.europa.esig.dss.xades.XPathQueryHolder;
/**
* This class provides the mechanism to retrieve certificates contained in a XAdES signature.
*
*/
public class XAdESCertificateSource extends SignatureCertificateSource {
private static final Logger LOG = LoggerFactory.getLogger(XAdESCertificateSource.class);
private final Element signatureElement;
private final XPathQueryHolder xPathQueryHolder;
private List keyInfoCerts;
private List encapsulatedCerts;
private List timestampValidationDataCerts;
/**
* The default constructor for XAdESCertificateSource. All certificates are extracted during instantiation.
*
* @param signatureElement
* {@code Element} that contains an XML signature
* @param xPathQueryHolder
* adapted {@code XPathQueryHolder}
* @param certificatePool
* {@code CertificatePool} to use to declare the found certificates
*/
public XAdESCertificateSource(final Element signatureElement, final XPathQueryHolder xPathQueryHolder, final CertificatePool certificatePool) {
super(certificatePool);
if (signatureElement == null) {
throw new NullPointerException();
}
if (xPathQueryHolder == null) {
throw new NullPointerException();
}
this.signatureElement = signatureElement;
this.xPathQueryHolder = xPathQueryHolder;
if (certificateTokens == null) {
certificateTokens = new ArrayList();
encapsulatedCerts = getCertificates(xPathQueryHolder.XPATH_ENCAPSULATED_X509_CERTIFICATE);
keyInfoCerts = getCertificates(xPathQueryHolder.XPATH_KEY_INFO_X509_CERTIFICATE);
timestampValidationDataCerts = getCertificates(xPathQueryHolder.XPATH_TSVD_ENCAPSULATED_X509_CERTIFICATE);
}
if (LOG.isInfoEnabled()) {
LOG.info("+XAdESCertificateSource");
}
}
/**
* @param xPathQuery
* XPath query
* @return
*/
private List getCertificates(final String xPathQuery) {
final List list = new ArrayList();
final NodeList nodeList = DomUtils.getNodeList(signatureElement, xPathQuery);
for (int ii = 0; ii < nodeList.getLength(); ii++) {
final Element certificateElement = (Element) nodeList.item(ii);
final byte[] derEncoded = Utils.fromBase64(certificateElement.getTextContent());
try {
final CertificateToken cert = DSSUtils.loadCertificate(derEncoded);
final CertificateToken certToken = addCertificate(cert);
if (!list.contains(certToken)) {
final String idIdentifier = DSSXMLUtils.getIDIdentifier(certificateElement);
certToken.setXmlId(idIdentifier);
list.add(certToken);
}
} catch (Exception e) {
LOG.warn("Unable to parse certificate '" + certificateElement.getTextContent() + "' : " + e.getMessage());
}
}
return list;
}
/**
* Returns the list of certificates included in
* ".../xades:UnsignedSignatureProperties/xades:CertificateValues/xades:EncapsulatedX509Certificate" node
*
* @return list of X509Certificate(s)
*/
@Override
public List getEncapsulatedCertificates() throws DSSException {
return encapsulatedCerts;
}
/**
* Returns the list of certificates included in "ds:KeyInfo/ds:X509Data/ds:X509Certificate" node
*
* @return list of X509Certificate(s)
*/
@Override
public List getKeyInfoCertificates() throws DSSException {
return keyInfoCerts;
}
/**
* Returns the list of certificates included in "xades141:TimeStampValidationData/xades132:CertificateValues" node
*
* @return
* @throws eu.europa.esig.dss.DSSException
*/
public List getTimestampCertificates() throws DSSException {
return timestampValidationDataCerts;
}
}