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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 Java 1.8 and later with debug enabled.
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package org.bouncycastle.jce.provider;

import java.security.cert.CertPathValidatorException;
import java.security.cert.Certificate;
import java.security.cert.PKIXRevocationChecker;
import java.security.cert.X509Certificate;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.internal.asn1.bsi.BSIObjectIdentifiers;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.internal.asn1.eac.EACObjectIdentifiers;
import org.bouncycastle.asn1.isara.IsaraObjectIdentifiers;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.rosstandart.RosstandartObjectIdentifiers;
import org.bouncycastle.asn1.x9.X9ObjectIdentifiers;
import org.bouncycastle.jcajce.PKIXCertRevocationChecker;
import org.bouncycastle.jcajce.PKIXCertRevocationCheckerParameters;
import org.bouncycastle.jcajce.util.JcaJceHelper;

class ProvRevocationChecker
    extends PKIXRevocationChecker
    implements PKIXCertRevocationChecker
{
    private static final int DEFAULT_OCSP_TIMEOUT = 15000;
    private static final int DEFAULT_OCSP_MAX_RESPONSE_SIZE = 32 * 1024;

    private static final Map oids = new HashMap();

    static
    {
        //
        // reverse mappings
        //
        oids.put(new ASN1ObjectIdentifier("1.2.840.113549.1.1.5"), "SHA1WITHRSA");
        oids.put(PKCSObjectIdentifiers.sha224WithRSAEncryption, "SHA224WITHRSA");
        oids.put(PKCSObjectIdentifiers.sha256WithRSAEncryption, "SHA256WITHRSA");
        oids.put(PKCSObjectIdentifiers.sha384WithRSAEncryption, "SHA384WITHRSA");
        oids.put(PKCSObjectIdentifiers.sha512WithRSAEncryption, "SHA512WITHRSA");
        oids.put(CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_94, "GOST3411WITHGOST3410");
        oids.put(CryptoProObjectIdentifiers.gostR3411_94_with_gostR3410_2001, "GOST3411WITHECGOST3410");
        oids.put(RosstandartObjectIdentifiers.id_tc26_signwithdigest_gost_3410_12_256, "GOST3411-2012-256WITHECGOST3410-2012-256");
        oids.put(RosstandartObjectIdentifiers.id_tc26_signwithdigest_gost_3410_12_512, "GOST3411-2012-512WITHECGOST3410-2012-512");
        oids.put(BSIObjectIdentifiers.ecdsa_plain_SHA1, "SHA1WITHPLAIN-ECDSA");
        oids.put(BSIObjectIdentifiers.ecdsa_plain_SHA224, "SHA224WITHPLAIN-ECDSA");
        oids.put(BSIObjectIdentifiers.ecdsa_plain_SHA256, "SHA256WITHPLAIN-ECDSA");
        oids.put(BSIObjectIdentifiers.ecdsa_plain_SHA384, "SHA384WITHPLAIN-ECDSA");
        oids.put(BSIObjectIdentifiers.ecdsa_plain_SHA512, "SHA512WITHPLAIN-ECDSA");
        oids.put(BSIObjectIdentifiers.ecdsa_plain_RIPEMD160, "RIPEMD160WITHPLAIN-ECDSA");
        oids.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_1, "SHA1WITHCVC-ECDSA");
        oids.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_224, "SHA224WITHCVC-ECDSA");
        oids.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_256, "SHA256WITHCVC-ECDSA");
        oids.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_384, "SHA384WITHCVC-ECDSA");
        oids.put(EACObjectIdentifiers.id_TA_ECDSA_SHA_512, "SHA512WITHCVC-ECDSA");
        oids.put(IsaraObjectIdentifiers.id_alg_xmss, "XMSS");
        oids.put(IsaraObjectIdentifiers.id_alg_xmssmt, "XMSSMT");

        oids.put(new ASN1ObjectIdentifier("1.2.840.113549.1.1.4"), "MD5WITHRSA");
        oids.put(new ASN1ObjectIdentifier("1.2.840.113549.1.1.2"), "MD2WITHRSA");
        oids.put(new ASN1ObjectIdentifier("1.2.840.10040.4.3"), "SHA1WITHDSA");
        oids.put(X9ObjectIdentifiers.ecdsa_with_SHA1, "SHA1WITHECDSA");
        oids.put(X9ObjectIdentifiers.ecdsa_with_SHA224, "SHA224WITHECDSA");
        oids.put(X9ObjectIdentifiers.ecdsa_with_SHA256, "SHA256WITHECDSA");
        oids.put(X9ObjectIdentifiers.ecdsa_with_SHA384, "SHA384WITHECDSA");
        oids.put(X9ObjectIdentifiers.ecdsa_with_SHA512, "SHA512WITHECDSA");
        oids.put(OIWObjectIdentifiers.sha1WithRSA, "SHA1WITHRSA");
        oids.put(OIWObjectIdentifiers.dsaWithSHA1, "SHA1WITHDSA");
        oids.put(NISTObjectIdentifiers.dsa_with_sha224, "SHA224WITHDSA");
        oids.put(NISTObjectIdentifiers.dsa_with_sha256, "SHA256WITHDSA");
    }

    private final JcaJceHelper helper;
    private final ProvCrlRevocationChecker crlChecker;
    private final ProvOcspRevocationChecker ocspChecker;

    private PKIXCertRevocationCheckerParameters parameters;

    public ProvRevocationChecker(JcaJceHelper helper)
    {
        this.helper = helper;
        this.crlChecker = new ProvCrlRevocationChecker(helper);
        this.ocspChecker = new ProvOcspRevocationChecker(this, helper);
    }

    public void setParameter(String name, Object value)
    {

    }

    public void initialize(PKIXCertRevocationCheckerParameters parameters)
    {
        this.parameters = parameters;
        crlChecker.initialize(parameters);
        ocspChecker.initialize(parameters);
    }

    public List getSoftFailExceptions()
    {
        return ocspChecker.getSoftFailExceptions();
    }

    public void init(boolean forForward)
        throws CertPathValidatorException
    {
        this.parameters = null;
         crlChecker.init(forForward);
         ocspChecker.init(forForward);
    }

    public boolean isForwardCheckingSupported()
    {
        return false;
    }

    public Set getSupportedExtensions()
    {
        return null;
    }

    public void check(Certificate certificate, Collection collection)
        throws CertPathValidatorException
    {
        X509Certificate cert = (X509Certificate)certificate;

        // only check end-entity certificates.
        if (hasOption(Option.ONLY_END_ENTITY) && cert.getBasicConstraints() != -1)
        {
            return;
        }

        if (hasOption(Option.PREFER_CRLS))
        {
            try
            {
                crlChecker.check(certificate);
            }
            catch (RecoverableCertPathValidatorException e)
            {
                if (!hasOption(Option.NO_FALLBACK))
                {
                    ocspChecker.check(certificate);
                }
                else
                {
                    throw e;
                }
            }
        }
        else
        {
            try
            {
                ocspChecker.check(certificate);
            }
            catch (RecoverableCertPathValidatorException e)
            {
                if (!hasOption(Option.NO_FALLBACK))
                {
                    crlChecker.check(certificate);
                }
                else
                {
                    throw e;
                }
            }
        }
    }

    private boolean hasOption(PKIXRevocationChecker.Option option)
    {
        return this.getOptions().contains(option);
    }
}