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.cms.jcajce;

import java.security.Provider;
import java.security.SecureRandom;

import javax.crypto.SecretKey;

import org.bouncycastle.asn1.cms.KEKIdentifier;
import org.bouncycastle.cms.KEKRecipientInfoGenerator;
import org.bouncycastle.operator.jcajce.JceSymmetricKeyWrapper;

public class JceKEKRecipientInfoGenerator
    extends KEKRecipientInfoGenerator
{
    public JceKEKRecipientInfoGenerator(KEKIdentifier kekIdentifier, SecretKey keyEncryptionKey)
    {
        super(kekIdentifier, new JceSymmetricKeyWrapper(keyEncryptionKey));
    }

    public JceKEKRecipientInfoGenerator(byte[] keyIdentifier, SecretKey keyEncryptionKey)
    {
        this(new KEKIdentifier(keyIdentifier, null, null), keyEncryptionKey);
    }

    public JceKEKRecipientInfoGenerator setProvider(Provider provider)
    {
        ((JceSymmetricKeyWrapper)this.wrapper).setProvider(provider);

        return this;
    }

    public JceKEKRecipientInfoGenerator setProvider(String providerName)
    {
        ((JceSymmetricKeyWrapper)this.wrapper).setProvider(providerName);

        return this;
    }

    public JceKEKRecipientInfoGenerator setSecureRandom(SecureRandom random)
    {
        ((JceSymmetricKeyWrapper)this.wrapper).setSecureRandom(random);

        return this;
    }
}