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The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 and up.
package org.bouncycastle.jce.provider;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.ref.WeakReference;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URI;
import java.net.URL;
import java.security.cert.CertPathValidatorException;
import java.security.cert.Extension;
import java.security.cert.X509Certificate;
import java.text.ParseException;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.WeakHashMap;
import org.bouncycastle.asn1.ASN1EncodableVector;
import org.bouncycastle.asn1.ASN1GeneralizedTime;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.ASN1OctetString;
import org.bouncycastle.asn1.ASN1Sequence;
import org.bouncycastle.asn1.DERSequence;
import org.bouncycastle.asn1.ocsp.BasicOCSPResponse;
import org.bouncycastle.asn1.ocsp.CertID;
import org.bouncycastle.asn1.ocsp.OCSPObjectIdentifiers;
import org.bouncycastle.asn1.ocsp.OCSPRequest;
import org.bouncycastle.asn1.ocsp.OCSPResponse;
import org.bouncycastle.asn1.ocsp.OCSPResponseStatus;
import org.bouncycastle.asn1.ocsp.Request;
import org.bouncycastle.asn1.ocsp.ResponseBytes;
import org.bouncycastle.asn1.ocsp.ResponseData;
import org.bouncycastle.asn1.ocsp.SingleResponse;
import org.bouncycastle.asn1.ocsp.TBSRequest;
import org.bouncycastle.asn1.x509.Extensions;
import org.bouncycastle.jcajce.PKIXCertRevocationCheckerParameters;
import org.bouncycastle.jcajce.util.JcaJceHelper;
import org.bouncycastle.util.BigIntegers;
import org.bouncycastle.util.io.Streams;
class OcspCache
{
private static final int DEFAULT_TIMEOUT = 15000;
private static final int DEFAULT_MAX_RESPONSE_SIZE = 32 * 1024;
private static Map>> cache
= Collections.synchronizedMap(new WeakHashMap>>());
static OCSPResponse getOcspResponse(
CertID certID, PKIXCertRevocationCheckerParameters parameters,
URI ocspResponder, X509Certificate responderCert, List ocspExtensions,
JcaJceHelper helper)
throws CertPathValidatorException
{
Map responseMap = null;
WeakReference> markerRef = cache.get(ocspResponder);
if (markerRef != null)
{
responseMap = markerRef.get();
}
if (responseMap != null)
{
OCSPResponse response = responseMap.get(certID);
if (response != null)
{
BasicOCSPResponse basicResp = BasicOCSPResponse.getInstance(
ASN1OctetString.getInstance(response.getResponseBytes().getResponse()).getOctets());
ResponseData responseData = ResponseData.getInstance(basicResp.getTbsResponseData());
ASN1Sequence s = responseData.getResponses();
for (int i = 0; i != s.size(); i++)
{
SingleResponse resp = SingleResponse.getInstance(s.getObjectAt(i));
if (certID.equals(resp.getCertID()))
{
ASN1GeneralizedTime nextUp = resp.getNextUpdate();
try
{
if (nextUp != null && parameters.getValidDate().after(nextUp.getDate()))
{
responseMap.remove(certID);
response = null;
}
}
catch (ParseException e)
{
// this should never happen, but...
responseMap.remove(certID);
response = null;
}
}
}
if (response != null)
{
return response;
}
}
}
URL ocspUrl;
try
{
ocspUrl = ocspResponder.toURL();
}
catch (MalformedURLException e)
{
throw new CertPathValidatorException("configuration error: " + e.getMessage(),
e, parameters.getCertPath(), parameters.getIndex());
}
//
// basic request generation
//
ASN1EncodableVector requests = new ASN1EncodableVector();
requests.add(new Request(certID, null));
List exts = ocspExtensions;
ASN1EncodableVector requestExtensions = new ASN1EncodableVector();
byte[] nonce = null;
for (int i = 0; i != exts.size(); i++)
{
Extension ext = (Extension)exts.get(i);
byte[] value = ext.getValue();
if (OCSPObjectIdentifiers.id_pkix_ocsp_nonce.getId().equals(ext.getId()))
{
nonce = value;
}
requestExtensions.add(new org.bouncycastle.asn1.x509.Extension(
new ASN1ObjectIdentifier(ext.getId()), ext.isCritical(), value));
}
// TODO: configure originator
TBSRequest tbsReq = new TBSRequest(null, new DERSequence(requests),
Extensions.getInstance(new DERSequence(requestExtensions)));
org.bouncycastle.asn1.ocsp.Signature signature = null;
try
{
byte[] request = new OCSPRequest(tbsReq, signature).getEncoded();
HttpURLConnection ocspCon = (HttpURLConnection)ocspUrl.openConnection();
ocspCon.setConnectTimeout(DEFAULT_TIMEOUT);
ocspCon.setReadTimeout(DEFAULT_TIMEOUT);
ocspCon.setDoOutput(true);
ocspCon.setDoInput(true);
ocspCon.setRequestMethod("POST");
ocspCon.setRequestProperty("Content-type", "application/ocsp-request");
ocspCon.setRequestProperty("Content-length", String.valueOf(request.length));
OutputStream reqOut = ocspCon.getOutputStream();
reqOut.write(request);
reqOut.flush();
InputStream reqIn = ocspCon.getInputStream();
int contentLength = ocspCon.getContentLength();
if (contentLength < 0)
{
// TODO: make configurable
contentLength = DEFAULT_MAX_RESPONSE_SIZE;
}
OCSPResponse response = OCSPResponse.getInstance(Streams.readAllLimited(reqIn, contentLength));
if (OCSPResponseStatus.SUCCESSFUL == response.getResponseStatus().getIntValue())
{
boolean validated = false;
ResponseBytes respBytes = ResponseBytes.getInstance(response.getResponseBytes());
if (respBytes.getResponseType().equals(OCSPObjectIdentifiers.id_pkix_ocsp_basic))
{
BasicOCSPResponse basicResp = BasicOCSPResponse.getInstance(respBytes.getResponse().getOctets());
validated = ProvOcspRevocationChecker.validatedOcspResponse(basicResp, parameters, nonce, responderCert, helper);
}
if (!validated)
{
throw new CertPathValidatorException(
"OCSP response failed to validate", null, parameters.getCertPath(), parameters.getIndex());
}
markerRef = cache.get(ocspResponder);
if (markerRef != null)
{
responseMap = markerRef.get();
responseMap.put(certID, response);
}
else
{
responseMap = new HashMap();
responseMap.put(certID, response);
cache.put(ocspResponder, new WeakReference>(responseMap));
}
return response;
}
else
{
throw new CertPathValidatorException(
"OCSP responder failed: " + response.getResponseStatus().getValue(),
null, parameters.getCertPath(), parameters.getIndex());
}
}
catch (IOException e)
{
throw new CertPathValidatorException("configuration error: " + e.getMessage(),
e, parameters.getCertPath(), parameters.getIndex());
}
}
}