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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 1.5 and up. 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.jcajce.provider.digest;

import org.bouncycastle.asn1.gm.GMObjectIdentifiers;
import org.bouncycastle.crypto.CipherKeyGenerator;
import org.bouncycastle.crypto.digests.SM3Digest;
import org.bouncycastle.crypto.macs.HMac;
import org.bouncycastle.jcajce.provider.config.ConfigurableProvider;
import org.bouncycastle.jcajce.provider.symmetric.util.BaseKeyGenerator;
import org.bouncycastle.jcajce.provider.symmetric.util.BaseMac;

public class SM3
{
    private SM3()
    {
    }

    static public class Digest
        extends BCMessageDigest
        implements Cloneable
    {
        public Digest()
        {
            super(new SM3Digest());
        }

        public Object clone()
            throws CloneNotSupportedException
        {
            Digest d = (Digest)super.clone();
            d.digest = new SM3Digest((SM3Digest)digest);

            return d;
        }
    }

    /**
     * SM3 HMac
     */
    public static class HashMac
        extends BaseMac
    {
        public HashMac()
        {
            super(new HMac(new SM3Digest()));
        }
    }

    public static class KeyGenerator
        extends BaseKeyGenerator
    {
        public KeyGenerator()
        {
            super("HMACSM3", 256, new CipherKeyGenerator());
        }
    }

    public static class Mappings
        extends DigestAlgorithmProvider
    {
        private static final String PREFIX = SM3.class.getName();

        public Mappings()
        {
        }

        public void configure(ConfigurableProvider provider)
        {
            provider.addAlgorithm("MessageDigest.SM3", PREFIX + "$Digest");
            provider.addAlgorithm("Alg.Alias.MessageDigest.SM3", "SM3");
            provider.addAlgorithm("Alg.Alias.MessageDigest.1.2.156.197.1.401", "SM3");  // old draft OID - deprecated
            provider.addAlgorithm("Alg.Alias.MessageDigest." + GMObjectIdentifiers.sm3, "SM3");

            addHMACAlgorithm(provider, "SM3", PREFIX + "$HashMac", PREFIX + "$KeyGenerator");
            addHMACAlias(provider, "SM3", GMObjectIdentifiers.hmac_sm3);
        }
    }
}