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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. The APIs are designed primarily to be used in conjunction with the BC FIPS provider. The APIs may also be used with other providers although if being used in a FIPS context it is the responsibility of the user to ensure that any other providers used are FIPS certified.
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package org.bouncycastle.operator;

import java.util.HashMap;
import java.util.Map;

import org.bouncycastle.asn1.ASN1Encodable;
import org.bouncycastle.asn1.ASN1ObjectIdentifier;
import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.bsi.BSIObjectIdentifiers;
import org.bouncycastle.asn1.cms.CMSObjectIdentifiers;
import org.bouncycastle.asn1.cryptopro.CryptoProObjectIdentifiers;
import org.bouncycastle.asn1.eac.EACObjectIdentifiers;
import org.bouncycastle.asn1.edec.EdECObjectIdentifiers;
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.pkcs.RSASSAPSSparams;
import org.bouncycastle.asn1.rosstandart.RosstandartObjectIdentifiers;
import org.bouncycastle.asn1.teletrust.TeleTrusTObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x9.X9ObjectIdentifiers;

/**
 * Class for return signature names from OIDs or AlgorithmIdentifiers
 */
public class DefaultSignatureNameFinder
    implements AlgorithmNameFinder
{
    private static final Map oids = new HashMap();
    private static final Map digests = new HashMap();

    static
    {
        //
        // reverse mappings
        //
        oids.put(PKCSObjectIdentifiers.id_RSASSA_PSS, "RSASSA-PSS");
        oids.put(EdECObjectIdentifiers.id_Ed25519, "ED25519");
        oids.put(EdECObjectIdentifiers.id_Ed448, "ED448");
        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(CMSObjectIdentifiers.id_RSASSA_PSS_SHAKE128, "SHAKE128WITHRSAPSS");
        oids.put(CMSObjectIdentifiers.id_RSASSA_PSS_SHAKE256, "SHAKE256WITHRSAPSS");
        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_SHA3_224, "SHA3-224WITHPLAIN-ECDSA");
//        oids.put(BSIObjectIdentifiers.ecdsa_plain_SHA3_256, "SHA3-256WITHPLAIN-ECDSA");
//        oids.put(BSIObjectIdentifiers.ecdsa_plain_SHA3_384, "SHA3-384WITHPLAIN-ECDSA");
//        oids.put(BSIObjectIdentifiers.ecdsa_plain_SHA3_512, "SHA3-512WITHPLAIN-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(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd128, "RIPEMD128WITHRSA");
        oids.put(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd160, "RIPEMD160WITHRSA");
        oids.put(TeleTrusTObjectIdentifiers.rsaSignatureWithripemd256, "RIPEMD256WITHRSA");
        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(CMSObjectIdentifiers.id_ecdsa_with_shake128, "SHAKE128WITHECDSA");
        oids.put(CMSObjectIdentifiers.id_ecdsa_with_shake256, "SHAKE256WITHECDSA");
        oids.put(OIWObjectIdentifiers.sha1WithRSA, "SHA1WITHRSA");
        oids.put(OIWObjectIdentifiers.dsaWithSHA1, "SHA1WITHDSA");
        oids.put(NISTObjectIdentifiers.dsa_with_sha224, "SHA224WITHDSA");
        oids.put(NISTObjectIdentifiers.dsa_with_sha256, "SHA256WITHDSA");

        digests.put(OIWObjectIdentifiers.idSHA1, "SHA1");
        digests.put(NISTObjectIdentifiers.id_sha224, "SHA224");
        digests.put(NISTObjectIdentifiers.id_sha256, "SHA256");
        digests.put(NISTObjectIdentifiers.id_sha384, "SHA384");
        digests.put(NISTObjectIdentifiers.id_sha512, "SHA512");
        digests.put(NISTObjectIdentifiers.id_sha3_224, "SHA3-224");
        digests.put(NISTObjectIdentifiers.id_sha3_256, "SHA3-256");
        digests.put(NISTObjectIdentifiers.id_sha3_384, "SHA3-384");
        digests.put(NISTObjectIdentifiers.id_sha3_512, "SHA3-512");
        digests.put(TeleTrusTObjectIdentifiers.ripemd128, "RIPEMD128");
        digests.put(TeleTrusTObjectIdentifiers.ripemd160, "RIPEMD160");
        digests.put(TeleTrusTObjectIdentifiers.ripemd256, "RIPEMD256");
    }

    public boolean hasAlgorithmName(ASN1ObjectIdentifier objectIdentifier)
    {
        return oids.containsKey(objectIdentifier);
    }

    public String getAlgorithmName(ASN1ObjectIdentifier objectIdentifier)
    {
        String name = (String)oids.get(objectIdentifier);
        if (name != null)
        {
            return name;
        }
        return objectIdentifier.getId();
    }

    /**
     * Return the signature name for the passed in algorithm identifier. For signatures
     * that require parameters, like RSASSA-PSS, this is the best one to use.
     *
     * @param algorithmIdentifier the AlgorithmIdentifier of interest.
     * @return a string representation of the name.
     */
    public String getAlgorithmName(AlgorithmIdentifier algorithmIdentifier)
    {
        ASN1Encodable params = algorithmIdentifier.getParameters();
        if (params != null && !DERNull.INSTANCE.equals(params))
        {
            if (algorithmIdentifier.getAlgorithm().equals(PKCSObjectIdentifiers.id_RSASSA_PSS))
            {
                RSASSAPSSparams rsaParams = RSASSAPSSparams.getInstance(params);
                AlgorithmIdentifier mgfAlg = rsaParams.getMaskGenAlgorithm();
                if (mgfAlg.getAlgorithm().equals(PKCSObjectIdentifiers.id_mgf1))
                {
                    AlgorithmIdentifier digAlg = rsaParams.getHashAlgorithm();
                    ASN1ObjectIdentifier mgfHashOid = AlgorithmIdentifier.getInstance(mgfAlg.getParameters()).getAlgorithm();
                    if (mgfHashOid.equals(digAlg.getAlgorithm()))
                    {
                        return getDigestName(digAlg.getAlgorithm()) + "WITHRSAANDMGF1";
                    }
                    else
                    {
                        return getDigestName(digAlg.getAlgorithm()) + "WITHRSAANDMGF1USING" + getDigestName(mgfHashOid);
                    }
                }
                return getDigestName(rsaParams.getHashAlgorithm().getAlgorithm()) + "WITHRSAAND" + mgfAlg.getAlgorithm().getId();
            }
        }

        if (oids.containsKey(algorithmIdentifier.getAlgorithm()))
        {
            return (String)oids.get(algorithmIdentifier.getAlgorithm());
        }

        return algorithmIdentifier.getAlgorithm().getId();
    }

    private static String getDigestName(ASN1ObjectIdentifier oid)
    {
        String name = (String)digests.get(oid);
        if (name != null)
        {
            return name;
        }
        return oid.getId();
    }
}