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;

import org.bouncycastle.asn1.cms.AttributeTable;

import java.util.Map;


Basic generator that just returns a preconstructed attribute table

/**
 * Basic generator that just returns a preconstructed attribute table
 */
public class SimpleAttributeTableGenerator
    implements CMSAttributeTableGenerator
{
    private final AttributeTable attributes;

    public SimpleAttributeTableGenerator(
        AttributeTable attributes)
    {
        this.attributes = attributes;
    }

    public AttributeTable getAttributes(Map parameters)
    {
        return attributes;
    }
}