Get Client Certificate from HTTPS Request


Is there a possibility to receive the client certificate which is used for client authentication during a web service call?
Is it stored in the request header somewhere ?

I have a package, with a REST (get) Service. I configured this service to be secured by a ACL which contains a user which has a (public)client certificate bound to it. When I start the request from my Postman with the (private) client certifcate I can successfully call the service. But I wanted to know if there is a way to obtain some information about the client certificate which was send during the request.

Thank you in advance.

you can try to turn on JSSE debug, detail:
KB #: 1760755