org.verapdf.gf.model.impl.external.GFPKCSDataObject Maven / Gradle / Ivy

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/**
 * This file is part of veraPDF Validation, a module of the veraPDF project.
 * Copyright (c) 2015, veraPDF Consortium 
 * All rights reserved.
 *
 * veraPDF Validation is free software: you can redistribute it and/or modify
 * it under the terms of either:
 *
 * The GNU General public license GPLv3+.
 * You should have received a copy of the GNU General Public License
 * along with veraPDF Validation as the LICENSE.GPL file in the root of the source
 * tree.  If not, see http://www.gnu.org/licenses/ or
 * https://www.gnu.org/licenses/gpl-3.0.en.html.
 *
 * The Mozilla Public License MPLv2+.
 * You should have received a copy of the Mozilla Public License along with
 * veraPDF Validation as the LICENSE.MPL file in the root of the source tree.
 * If a copy of the MPL was not distributed with this file, you can obtain one at
 * http://mozilla.org/MPL/2.0/.
 */
package org.verapdf.gf.model.impl.external;

import org.verapdf.cos.COSString;
import org.verapdf.model.external.PKCSDataObject;
import sun.security.pkcs.ContentInfo;
import sun.security.pkcs.PKCS7;
import sun.security.pkcs.SignerInfo;
import sun.security.x509.AlgorithmId;

import java.io.IOException;
import java.security.cert.X509Certificate;
import java.util.logging.Level;
import java.util.logging.Logger;

/**
 * @author Sergey Shemyakov
 */
public class GFPKCSDataObject extends GFExternal implements PKCSDataObject {

    private static final Logger LOGGER = Logger.getLogger(GFPKCSDataObject.class.getCanonicalName());

    /**
     * Type name for {@code PBoxPKCSDataObject}
     */
    public static final String PKCS_DATA_OBJECT_TYPE = "PKCSDataObject";

    private PKCS7 pkcs7;

    /**
     * @param pkcsData {@link COSString} containing encoded PKCS#7 object.
     */
    public GFPKCSDataObject(COSString pkcsData) {
        super(PKCS_DATA_OBJECT_TYPE);
        try {
            if (!pkcsData.isHexadecimal()) {
                pkcs7 = new PKCS7(pkcsData.get());
            } else {
                byte[] decodedData = pkcsData.get();
                pkcs7 = new PKCS7(decodedData);
            }
        } catch (IOException e) {
            LOGGER.log(Level.FINE, "Passed PKCS7 object can't be read", e);
            pkcs7 = getEmptyPKCS7();
        }
    }

    /**
     * @return amount of SignerInfo entries in PKCS#7 object.
     */
    @Override
    public Long getSignerInfoCount() {
        return new Long(pkcs7.getSignerInfos().length);
    }

    /**
     * @return true if at least one certificate is contained in PKCS#7 object
     * and all present certificates are not nulls.
     */
    @Override
    public Boolean getsigningCertificatePresent() {
        X509Certificate[] certificates = pkcs7.getCertificates();
        if (certificates.length == 0) {
            return Boolean.FALSE;
        }
		for (X509Certificate cert : certificates) {
		    if (cert == null) {
	            return Boolean.FALSE;
		    }
		}
        return Boolean.TRUE;
    }

    private static PKCS7 getEmptyPKCS7() {
        return new PKCS7(new AlgorithmId[]{}, new ContentInfo(new byte[]{}),
                new X509Certificate[]{}, new SignerInfo[]{});
    }

}