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.cert;

import java.io.IOException;


General IOException thrown in the cert package and its sub-packages.

/**
 * General IOException thrown in the cert package and its sub-packages.
 */
public class CertIOException
    extends IOException
{
    private Throwable cause;

    public CertIOException(String msg, Throwable cause)
    {
        super(msg);

        this.cause = cause;
    }

    public CertIOException(String msg)
    {
        super(msg);
    }

    public Throwable getCause()
    {
        return cause;
    }
}