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/*
* $Id: OcspClientBouncyCastle.java 3959 2009-06-09 08:31:05Z blowagie $
*
* Copyright 2009 Paulo Soares
*
* The contents of this file are subject to the Mozilla Public License Version 1.1
* (the "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the License.
*
* The Original Code is 'iText, a free JAVA-PDF library'.
*
* The Initial Developer of the Original Code is Bruno Lowagie. Portions created by
* the Initial Developer are Copyright (C) 1999-2005 by Bruno Lowagie.
* All Rights Reserved.
* Co-Developer of the code is Paulo Soares. Portions created by the Co-Developer
* are Copyright (C) 2009 by Paulo Soares. All Rights Reserved.
*
* Contributor(s): all the names of the contributors are added in the source code
* where applicable.
*
* Alternatively, the contents of this file may be used under the terms of the
* LGPL license (the "GNU LIBRARY GENERAL PUBLIC LICENSE"), in which case the
* provisions of LGPL are applicable instead of those above. If you wish to
* allow use of your version of this file only under the terms of the LGPL
* License and not to allow others to use your version of this file under
* the MPL, indicate your decision by deleting the provisions above and
* replace them with the notice and other provisions required by the LGPL.
* If you do not delete the provisions above, a recipient may use your version
* of this file under either the MPL or the GNU LIBRARY GENERAL PUBLIC LICENSE.
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the MPL as stated above or under the terms of the GNU
* Library General Public License as published by the Free Software Foundation;
* either version 2 of the License, or 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 Library general Public License for more
* details.
*
* If you didn't download this code from the following link, you should check if
* you aren't using an obsolete version:
* http://www.lowagie.com/iText/
*/
package com.lowagie.text.pdf;
import com.lowagie.text.ExceptionConverter;
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.CertificateEncodingException;
import java.security.cert.X509Certificate;
import java.util.Vector;
import org.bouncycastle.asn1.DEROctetString;
import org.bouncycastle.asn1.ocsp.OCSPObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.Extension;
import org.bouncycastle.asn1.x509.Extensions;
import org.bouncycastle.asn1.x509.X509Extension;
import org.bouncycastle.asn1.x509.X509Extensions;
import org.bouncycastle.cert.jcajce.JcaX509CertificateHolder;
import org.bouncycastle.cert.ocsp.BasicOCSPResp;
import org.bouncycastle.cert.ocsp.CertificateID;
import org.bouncycastle.cert.ocsp.CertificateStatus;
import org.bouncycastle.cert.ocsp.OCSPException;
import org.bouncycastle.cert.ocsp.OCSPReq;
import org.bouncycastle.cert.ocsp.OCSPReqBuilder;
import org.bouncycastle.cert.ocsp.OCSPResp;
import org.bouncycastle.cert.ocsp.SingleResp;
import org.bouncycastle.operator.DigestCalculator;
import org.bouncycastle.operator.DigestCalculatorProvider;
import org.bouncycastle.operator.OperatorException;
import org.bouncycastle.operator.jcajce.JcaDigestCalculatorProviderBuilder;
/**
* OcspClient implementation using BouncyCastle.
* @author psoares
* @since 2.1.6
*/
public class OcspClientBouncyCastle implements OcspClient {
/** root certificate */
private X509Certificate rootCert;
/** check certificate */
private X509Certificate checkCert;
/** OCSP URL */
private String url;
/**
* Creates an instance of an OcspClient that will be using BouncyCastle.
* @param checkCert the check certificate
* @param rootCert the root certificate
* @param url the OCSP URL
*/
public OcspClientBouncyCastle(X509Certificate checkCert, X509Certificate rootCert, String url) {
this.checkCert = checkCert;
this.rootCert = rootCert;
this.url = url;
}
/**
* 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, OperatorException, CertificateEncodingException {
//Add provider BC
Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider());
JcaDigestCalculatorProviderBuilder digestCalculatorProviderBuilder = new JcaDigestCalculatorProviderBuilder();
DigestCalculatorProvider digestCalculatorProvider = digestCalculatorProviderBuilder.build();
DigestCalculator digestCalculator = digestCalculatorProvider.get(CertificateID.HASH_SHA1);
// Generate the id for the certificate we are looking for
CertificateID id = new CertificateID(digestCalculator, new JcaX509CertificateHolder(issuerCert), serialNumber);
// basic request generation with nonce
OCSPReqBuilder gen = new OCSPReqBuilder();
gen.addRequest(id);
// create details for nonce extension
Extension ext = new Extension(OCSPObjectIdentifiers.id_pkix_ocsp_nonce, false, new DEROctetString(new DEROctetString(PdfEncryption.createDocumentId()).getEncoded()));
gen.setRequestExtensions(new Extensions(new Extension[]{ext}));
return gen.build();
}
/**
* @return a byte array
* @see com.lowagie.text.pdf.OcspClient#getEncoded()
*/
public byte[] getEncoded() {
try {
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("Invalid HTTP response");
}
//Get Response
InputStream in = (InputStream) con.getContent();
OCSPResp ocspResponse = new OCSPResp(in);
if (ocspResponse.getStatus() != 0)
throw new IOException("Invalid status: " + 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.cert.ocsp.RevokedStatus) {
throw new IOException("OCSP Status is revoked!");
}
else {
throw new IOException("OCSP Status is unknown!");
}
}
}
}
catch (Exception ex) {
throw new ExceptionConverter(ex);
}
return null;
}
}
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