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

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/**
 * 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.validation.SignaturePolicy;

/**
 * Performs a validation of a SignaturePolicy
 *
 */
public interface SignaturePolicyValidator {

	/**
	 * Checks if the SignaturePolicy can be validated
	 * 
	 * @param signaturePolicy {@link SignaturePolicy} to check
	 * @return TRUE if the {@code SignaturePolicy} can be validated, FALSE otherwise
	 */
	boolean canValidate(SignaturePolicy signaturePolicy);

	/**
	 * Performs a {@code SignaturePolicy} validation
	 *
	 * @param signaturePolicy {@link SignaturePolicy} to be validated
	 * @return {@link SignaturePolicyValidationResult}
	 */
	SignaturePolicyValidationResult validate(SignaturePolicy signaturePolicy);
	
	/**
	 * Returns {@code Digest} on the computed SignaturePolicy's content
	 * 
	 * @param policyDocument {@link DSSDocument} the policy content
	 * @param digestAlgorithm {@link DigestAlgorithm} to use
	 * @return {@link Digest}
	 */
	Digest getComputedDigest(DSSDocument policyDocument, DigestAlgorithm digestAlgorithm);

}