Java tutorial
/* * DSS - Digital Signature Services * * Copyright (C) 2011 European Commission, Directorate-General Internal Market and Services (DG MARKT), B-1049 Bruxelles/Brussel * * Developed by: 2011 ARHS Developments S.A. (rue Nicolas Bov 2B, L-1253 Luxembourg) http://www.arhs-developments.com * * This file is part of the "DSS - Digital Signature Services" project. * * "DSS - Digital Signature Services" 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. * * DSS 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 * "DSS - Digital Signature Services". If not, see <http://www.gnu.org/licenses/>. */ package eu.europa.ec.markt.dss.validation.pades; import eu.europa.ec.markt.dss.validation.ades.SignatureCertificateSource; import java.io.ByteArrayInputStream; import java.io.IOException; import java.security.cert.CertificateException; import java.security.cert.CertificateFactory; import java.security.cert.X509Certificate; import java.util.ArrayList; import java.util.List; import java.util.logging.Logger; import com.lowagie.text.pdf.PRStream; import com.lowagie.text.pdf.PdfArray; import com.lowagie.text.pdf.PdfDictionary; import com.lowagie.text.pdf.PdfName; import com.lowagie.text.pdf.PdfReader; import com.lowagie.text.pdf.PdfStream; /** * CertificateSource that will retrieve the certificate from a PAdES Signature * * * @version $Revision: 1867 $ - $Date: 2013-04-08 13:44:56 +0200 (Mon, 08 Apr 2013) $ */ public class PAdESCertificateSource extends SignatureCertificateSource { private Logger LOG = Logger.getLogger(PAdESCertificateSource.class.getName()); private PdfDictionary catalog; /** * The default constructor for PAdESCertificateSource. * @param pdfReader */ public PAdESCertificateSource(PdfReader pdfReader) { this(pdfReader.getCatalog()); } /** * The default constructor for PAdESCertificateSource. * @param catalog */ public PAdESCertificateSource(PdfDictionary catalog) { this.catalog = catalog; } /* * (non-Javadoc) * * @see eu.europa.ec.markt.dss.validation.ades.SignatureCertificateSource#getCertificatesFromSignature() */ @Override public List<X509Certificate> getCertificates() { try { List<X509Certificate> certs = new ArrayList<X509Certificate>(); PdfDictionary dss = catalog.getAsDict(new PdfName("DSS")); if (dss != null) { PdfArray certsArray = dss.getAsArray(new PdfName("Certs")); if (certsArray != null) { CertificateFactory factory = CertificateFactory.getInstance("X509"); for (int i = 0; i < certsArray.size(); i++) { PdfStream stream = certsArray.getAsStream(i); X509Certificate cert = (X509Certificate) factory.generateCertificate( new ByteArrayInputStream(PdfReader.getStreamBytes((PRStream) stream))); if (!certs.contains(cert)) { certs.add(cert); } } } } return certs; } catch (IOException ex) { throw new RuntimeException(ex); } catch (CertificateException e) { throw new RuntimeException(e); } } }