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.jce.provider;

public class PKIXNameConstraintValidatorException
    extends Exception
{
    public PKIXNameConstraintValidatorException(String msg)
    {
        super(msg);
    }
}