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.est;

import java.io.IOException;


ESTClient implement connection to the server.


Implementations should be aware that they are responsible for
satisfying RFC7030 3.3 - TLS Layer
including SRP modes.

/**
 * ESTClient implement connection to the server.
 * <p>
 * Implementations should be aware that they are responsible for
 * satisfying <a href="https://tools.ietf.org/html/rfc7030#section-3.3">RFC7030 3.3 - TLS Layer</a>
 * including SRP modes.
 */
public interface ESTClient
{
    public ESTResponse doRequest(ESTRequest c)
        throws IOException;
}