CrlClientImp.java

/*
 * $Id: ColumnText.java 5056 2012-02-20 14:56:44Z eugenemark $
 *
 * This file is part of the iText (R) project.
 * Copyright (c) 1998-2012 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program 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 Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * a covered work must retain the producer line in every PDF that is created
 * or manipulated using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 */
package com.itextpdf.text.pdf;

import com.itextpdf.text.ExceptionConverter;
import com.itextpdf.text.error_messages.MessageLocalization;
import com.itextpdf.text.log.Level;
import com.itextpdf.text.log.Logger;
import com.itextpdf.text.log.LoggerFactory;
import java.io.BufferedOutputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.cert.X509Certificate;

/**
 *
 * @author psoares
 */
public class CrlClientImp implements CrlClient {
    private static final Logger LOGGER = LoggerFactory.getLogger(CrlClientImp.class);

    public byte[] getEncoded(X509Certificate checkCert, String url) {
        try {
            if (url == null) {
                if (checkCert == null)
                    return null;
                url = PdfPKCS7.getCrlUrl(checkCert);
            }
            if (url == null)
                return null;
            URL urlt = new URL(url);
            HttpURLConnection con = (HttpURLConnection)urlt.openConnection();
            if (con.getResponseCode() / 100 != 2) {
                throw new IOException(MessageLocalization.getComposedMessage("invalid.http.response.1", con.getResponseCode()));
            }
            //Get Response
            InputStream inp = (InputStream) con.getContent();
            byte[] buf = new byte[1024];
            ByteArrayOutputStream bout = new ByteArrayOutputStream();
            while (true) {
                int n = inp.read(buf, 0, buf.length);
                if (n <= 0)
                    break;
                bout.write(buf, 0, n);
            }
            inp.close();
            return bout.toByteArray();
        }
        catch (Exception ex) {
            if (LOGGER.isLogging(Level.ERROR))
                LOGGER.error("CrlClientImp", ex);
        }
        return null;
    }
}