http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5. 
package org.bouncycastle.crypto.tls;

import java.security.SecureRandom;

public interface TlsClientContext
{
    SecureRandom getSecureRandom();

    SecurityParameters getSecurityParameters();

    Object getUserObject();

    void setUserObject(Object userObject);
}