x509test is a software written in Python 3 that test the x509 certificate verification process of the target SSL/TLS client. The inspiration of this software comes from multiple reports on the insecurity of a SSL/TLS client due to incorrect verification of x509 certificate chain. This phenomenon is caused by many factors. One of which is the lack of negative feedback from over-acceptance of invalid certificates. This software is an attempt to increase the security of a client-side SSL/TLS software by providing negative feedbacks to the developers.
more here..........https://github.com/yymax/x509test
more here..........https://github.com/yymax/x509test