http://www.bouncycastle.org/java.html: The Bouncy Castle Java APIs for CMS, PKCS, EAC, TSP, CMP, CRMF, OCSP, and certificate generation. This jar contains APIs for JDK 1.5 to JDK 1.8. The APIs can be used in conjunction with a JCE/JCA provider such as the one provided with the Bouncy Castle Cryptography APIs.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.pkcs;


import java.io.IOException;
import java.io.OutputStream;

import org.bouncycastle.asn1.pkcs.MacData;
import org.bouncycastle.asn1.pkcs.PKCS12PBEParams;
import org.bouncycastle.asn1.x509.AlgorithmIdentifier;
import org.bouncycastle.asn1.x509.DigestInfo;
import org.bouncycastle.operator.MacCalculator;

class MacDataGenerator
{
    private PKCS12MacCalculatorBuilder builder;

    MacDataGenerator(PKCS12MacCalculatorBuilder builder)
    {
        this.builder = builder;
    }

    public MacData build(char[] password, byte[] data)
        throws PKCSException
    {
        MacCalculator     macCalculator;

        try
        {
            macCalculator = builder.build(password);

            OutputStream out = macCalculator.getOutputStream();

            out.write(data);

            out.close();
        }
        catch (Exception e)
        {
            throw new PKCSException("unable to process data: " + e.getMessage(), e);
        }

        AlgorithmIdentifier algId = macCalculator.getAlgorithmIdentifier();

        DigestInfo dInfo = new DigestInfo(builder.getDigestAlgorithmIdentifier(), macCalculator.getMac());
        PKCS12PBEParams params = PKCS12PBEParams.getInstance(algId.getParameters());

        return new MacData(dInfo, params.getIV(), params.getIterations().intValue());
    }
}