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 to JDK 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.jce.exception;

import java.security.cert.CertPath;
import java.security.cert.CertPathValidatorException;

public class ExtCertPathValidatorException
    extends CertPathValidatorException
    implements ExtException
{

    private Throwable cause;

    public ExtCertPathValidatorException(String message, Throwable cause)
    {
        super(message);
        this.cause = cause;
    }

    public ExtCertPathValidatorException(String msg, Throwable cause, 
        CertPath certPath, int index)
    {
        super(msg, cause, certPath, index);
        this.cause = cause;
    }
    
    public Throwable getCause()
    {
        return cause;
    }
}