/**
* 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 eu.europa.esig.dss.DSSException;
import eu.europa.esig.dss.DSSUtils;
import eu.europa.esig.dss.DigestAlgorithm;
import eu.europa.esig.dss.TimestampParameters;
import eu.europa.esig.dss.validation.CertificateVerifier;
import eu.europa.esig.dss.x509.TimestampType;
/**
* Holds level A aspects of XAdES
*
*/
public class XAdESLevelA extends XAdESLevelXL {
/**
* The default constructor for XAdESLevelA.
*/
public XAdESLevelA(CertificateVerifier certificateVerifier) {
super(certificateVerifier);
}
/**
* Adds the ArchiveTimeStamp element which is an unsigned property qualifying the signature. The hash sent to the TSA
* (messageImprint) is computed on the XAdES-X-L form of the electronic signature and the signed data objects.<br>
*
* A XAdES-A form MAY contain several ArchiveTimeStamp elements.
*
* @see XAdESLevelXL#extendSignatureTag()
*/
@Override
protected void extendSignatureTag() throws DSSException {
/* Up to -XL */
super.extendSignatureTag();
xadesSignature.checkSignatureIntegrity();
final TimestampParameters archiveTimestampParameters = params.getArchiveTimestampParameters();
final String canonicalizationMethod = archiveTimestampParameters.getCanonicalizationMethod();
final byte[] data = xadesSignature.getArchiveTimestampData(null, canonicalizationMethod);
final DigestAlgorithm timestampDigestAlgorithm = archiveTimestampParameters.getDigestAlgorithm();
final byte[] digestBytes = DSSUtils.digest(timestampDigestAlgorithm, data);
createXAdESTimeStampType(TimestampType.ARCHIVE_TIMESTAMP, canonicalizationMethod, digestBytes);
}
}