eu.europa.esig.dss.xades.signature.ExtensionBuilder 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.signature;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;
import eu.europa.esig.dss.DSSException;
import eu.europa.esig.dss.DomUtils;
import eu.europa.esig.dss.XAdESNamespaces;
import eu.europa.esig.dss.validation.CertificateVerifier;
import eu.europa.esig.dss.xades.validation.XAdESSignature;
public abstract class ExtensionBuilder extends XAdESBuilder {
/*
* This object allows to access DOM signature representation using XPATH
*/
protected XAdESSignature xadesSignature;
/**
* This field represents the current signature being extended.
*/
protected Element currentSignatureDom;
/**
* This field represents the signature qualifying properties
*/
protected Element qualifyingPropertiesDom;
/**
* This field represents the unsigned properties
*/
protected Element unsignedPropertiesDom;
/**
* This field contains unsigned signature properties
*/
protected Element unsignedSignaturePropertiesDom;
/**
* This field represents the signed properties
*/
protected Element signedPropertiesDom;
/**
* This field contains signed data object properties
*/
protected Element signedDataObjectPropertiesDom;
protected ExtensionBuilder(final CertificateVerifier certificateVerifier) {
super(certificateVerifier);
}
/**
* Returns or creates (if it does not exist) the UnsignedPropertiesType DOM object.
*
* @return
* @throws DSSException
*/
protected void ensureUnsignedProperties() throws DSSException {
final NodeList qualifyingPropertiesNodeList = currentSignatureDom.getElementsByTagNameNS(XAdESNamespaces.XAdES, "QualifyingProperties");
if (qualifyingPropertiesNodeList.getLength() != 1) {
throw new DSSException("The signature does not contain QualifyingProperties element (or contains more than one)! Extension is not possible.");
}
qualifyingPropertiesDom = (Element) qualifyingPropertiesNodeList.item(0);
final NodeList unsignedPropertiesNodeList = currentSignatureDom.getElementsByTagNameNS(XAdESNamespaces.XAdES, "UnsignedProperties");
final int length = unsignedPropertiesNodeList.getLength();
if (length == 1) {
unsignedPropertiesDom = (Element) qualifyingPropertiesNodeList.item(0);
} else if (length == 0) {
unsignedPropertiesDom = DomUtils.addElement(documentDom, qualifyingPropertiesDom, XAdESNamespaces.XAdES, "xades:UnsignedProperties");
} else {
throw new DSSException("The signature contains more then one UnsignedProperties element! Extension is not possible.");
}
}
/**
* Returns or creates (if it does not exist) the UnsignedSignaturePropertiesType DOM object.
*
* @return
* @throws DSSException
*/
protected void ensureUnsignedSignatureProperties() throws DSSException {
final NodeList unsignedSignaturePropertiesNodeList = currentSignatureDom.getElementsByTagNameNS(XAdESNamespaces.XAdES, "UnsignedSignatureProperties");
final int length = unsignedSignaturePropertiesNodeList.getLength();
if (length == 1) {
unsignedSignaturePropertiesDom = (Element) unsignedSignaturePropertiesNodeList.item(0);
} else if (length == 0) {
unsignedSignaturePropertiesDom = DomUtils.addElement(documentDom, unsignedPropertiesDom, XAdESNamespaces.XAdES,
"xades:UnsignedSignatureProperties");
} else {
throw new DSSException("The signature contains more then one UnsignedSignatureProperties element! Extension is not possible.");
}
}
/**
* Returns or create (if it does not exist) the SignedDataObjectProperties DOM object.
*
* @throws DSSException
*/
protected void ensureSignedDataObjectProperties() throws DSSException {
final NodeList signedDataObjectPropertiesNodeList = currentSignatureDom.getElementsByTagNameNS(XAdESNamespaces.XAdES, "SignedDataObjectProperties");
final int length = signedDataObjectPropertiesNodeList.getLength();
if (length == 1) {
signedDataObjectPropertiesDom = (Element) signedDataObjectPropertiesNodeList.item(0);
} else if (length > 1) {
throw new DSSException("The signature contains more than one SignedDataObjectProperties element! Extension is not possible.");
}
}
}