/*
* $Id: OcspClientBouncyCastle.java 5075 2012-02-27 16:36:18Z blowagie $
*
* 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,
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*
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*/
package com.itextpdf.text.pdf;
import java.io.BufferedOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.math.BigInteger;
import java.net.HttpURLConnection;
import java.net.URL;
import java.security.Security;
import java.security.cert.X509Certificate;
import java.util.Vector;
import org.bouncycastle.asn1.DERObjectIdentifier;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.ocsp.OCSPObjectIdentifiers;
import org.bouncycastle.asn1.x509.X509Extension;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.ocsp.BasicOCSPResp;
import org.bouncycastle.ocsp.CertificateID;
import org.bouncycastle.ocsp.CertificateStatus;
import org.bouncycastle.ocsp.OCSPException;
import org.bouncycastle.ocsp.OCSPReq;
import org.bouncycastle.ocsp.OCSPReqGenerator;
import org.bouncycastle.ocsp.OCSPResp;
import org.bouncycastle.ocsp.SingleResp;
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;
/**
* OcspClient implementation using BouncyCastle.
* @author psoares
* @since 2.1.6
*/
public class OcspClientBouncyCastle implements OcspClient {
private static final Logger LOGGER = LoggerFactory.getLogger(OcspClientBouncyCastle.class);
/**
* Generates an OCSP request using BouncyCastle.
* @param issuerCert certificate of the issues
* @param serialNumber serial number
* @return an OCSP request
* @throws OCSPException
* @throws IOException
*/
private static OCSPReq generateOCSPRequest(X509Certificate issuerCert, BigInteger serialNumber) throws OCSPException, IOException {
//Add provider BC
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
// Generate the id for the certificate we are looking for
CertificateID id = new CertificateID(CertificateID.HASH_SHA1, issuerCert, serialNumber);
// basic request generation with nonce
OCSPReqGenerator gen = new OCSPReqGenerator();
gen.addRequest(id);
// create details for nonce extension
Vector<DERObjectIdentifier> oids = new Vector<DERObjectIdentifier>();
Vector<X509Extension> values = new Vector<X509Extension>();
oids.add(OCSPObjectIdentifiers.id_pkix_ocsp_nonce);
values.add(new X509Extension(false, new DEROctetString(new DEROctetString(PdfEncryption.createDocumentId()).getEncoded())));
gen.setRequestExtensions(new X509Extensions(oids, values));
return gen.generate();
}
/**
* Gets an encoded byte array with OCSP validation. The method should not throw an exception.
* @param checkCert to certificate to check
* @param rootCert the parent certificate
* @param the url to get the verification. It it's null it will be taken
* from the check cert or from other implementation specific source
* @return a byte array with the validation or null if the validation could not be obtained
*/
public byte[] getEncoded(X509Certificate checkCert, X509Certificate rootCert, String url) {
try {
if (checkCert == null || rootCert == null)
return null;
if (url == null) {
url = PdfPKCS7.getOCSPURL(checkCert);
}
if (url == null)
return null;
OCSPReq request = generateOCSPRequest(rootCert, checkCert.getSerialNumber());
byte[] array = request.getEncoded();
URL urlt = new URL(url);
HttpURLConnection con = (HttpURLConnection)urlt.openConnection();
con.setRequestProperty("Content-Type", "application/ocsp-request");
con.setRequestProperty("Accept", "application/ocsp-response");
con.setDoOutput(true);
OutputStream out = con.getOutputStream();
DataOutputStream dataOut = new DataOutputStream(new BufferedOutputStream(out));
dataOut.write(array);
dataOut.flush();
dataOut.close();
if (con.getResponseCode() / 100 != 2) {
throw new IOException(MessageLocalization.getComposedMessage("invalid.http.response.1", con.getResponseCode()));
}
//Get Response
InputStream in = (InputStream) con.getContent();
OCSPResp ocspResponse = new OCSPResp(in);
if (ocspResponse.getStatus() != 0)
throw new IOException(MessageLocalization.getComposedMessage("invalid.status.1", ocspResponse.getStatus()));
BasicOCSPResp basicResponse = (BasicOCSPResp) ocspResponse.getResponseObject();
if (basicResponse != null) {
SingleResp[] responses = basicResponse.getResponses();
if (responses.length == 1) {
SingleResp resp = responses[0];
Object status = resp.getCertStatus();
if (status == CertificateStatus.GOOD) {
return basicResponse.getEncoded();
}
else if (status instanceof org.bouncycastle.ocsp.RevokedStatus) {
throw new IOException(MessageLocalization.getComposedMessage("ocsp.status.is.revoked"));
}
else {
throw new IOException(MessageLocalization.getComposedMessage("ocsp.status.is.unknown"));
}
}
}
}
catch (Exception ex) {
if (LOGGER.isLogging(Level.ERROR))
LOGGER.error("OcspClientBouncyCastle", ex);
}
return null;
}
}