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The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.4. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.

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package org.bouncycastle.operator;

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

import org.bouncycastle.asn1.DERNull;
import org.bouncycastle.asn1.nist.NISTObjectIdentifiers;
import org.bouncycastle.asn1.oiw.OIWObjectIdentifiers;
import org.bouncycastle.asn1.pkcs.PKCSObjectIdentifiers;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.util.Strings;

public class DefaultMacAlgorithmIdentifierFinder
    implements MacAlgorithmIdentifierFinder
{
    private static Map macNameToAlgIds = new HashMap();

    static
    {
        macNameToAlgIds.put("HMACSHA1", new AlgorithmIdentifier(OIWObjectIdentifiers.idSHA1));
        macNameToAlgIds.put("HMACSHA224", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA224, DERNull.INSTANCE));
        macNameToAlgIds.put("HMACSHA256", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA256, DERNull.INSTANCE));
        macNameToAlgIds.put("HMACSHA384", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA384, DERNull.INSTANCE));
        macNameToAlgIds.put("HMACSHA512", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA512, DERNull.INSTANCE));
        macNameToAlgIds.put("HMACSHA512-224", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA512_224, DERNull.INSTANCE));
        macNameToAlgIds.put("HMACSHA512-256", new AlgorithmIdentifier(PKCSObjectIdentifiers.id_hmacWithSHA512_256, DERNull.INSTANCE));

        macNameToAlgIds.put("HMACSHA3-224", new AlgorithmIdentifier(NISTObjectIdentifiers.id_hmacWithSHA3_224));
        macNameToAlgIds.put("HMACSHA3-256", new AlgorithmIdentifier(NISTObjectIdentifiers.id_hmacWithSHA3_256));
        macNameToAlgIds.put("HMACSHA3-384", new AlgorithmIdentifier(NISTObjectIdentifiers.id_hmacWithSHA3_384));
        macNameToAlgIds.put("HMACSHA3-512", new AlgorithmIdentifier(NISTObjectIdentifiers.id_hmacWithSHA3_512));
    }

    public AlgorithmIdentifier find(String macAlgName)
    {
        return (AlgorithmIdentifier)macNameToAlgIds.get(Strings.toUpperCase(macAlgName));
    }
}