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DSS Document contains the code for the creation and validation of XAdES, CAdES, PAdES and ASiC signatures.

There is a newer version: 6.1

/**
 * 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.validation.policy;

import eu.europa.esig.dss.enumerations.DigestAlgorithm;
import eu.europa.esig.dss.model.DSSDocument;
import eu.europa.esig.dss.model.Digest;
import eu.europa.esig.dss.spi.DSSUtils;
import eu.europa.esig.dss.validation.SignaturePolicy;

/**
 * Performs validation of a SignaturePolicy with zero-sigPolicyHash
 * See EN 319 122-1 "5.2.9 The signature-policy-identifier attribute and the SigPolicyQualifierInfo type"
 *
 */
public class ZeroHashSignaturePolicyValidator extends AbstractSignaturePolicyValidator {

	/**
	 * Default constructor
	 */
	public ZeroHashSignaturePolicyValidator() {
		// empty
	}

	@Override
	public boolean canValidate(SignaturePolicy signaturePolicy) {
		return signaturePolicy.isZeroHash();
	}

	@Override
	public SignaturePolicyValidationResult validate(SignaturePolicy signaturePolicy) {
		SignaturePolicyValidationResult validationResult = new SignaturePolicyValidationResult();
		validationResult.setIdentified(true);
		validationResult.setDigestValid(true);
		return validationResult;
	}

	@Override
	public Digest getComputedDigest(DSSDocument policyDocument, DigestAlgorithm digestAlgorithm) {
		return new Digest(digestAlgorithm, DSSUtils.EMPTY_BYTE_ARRAY);
	}

}