How to attach ssl certificates to response using Groovy script

As this script was meant for the default mock responses which access actual web service in case we have requests other than the mocked ones, I created a keystore locally and imported the client certificates in cacerts in /java/jdk/jre/lib/security/.

Then in preferences->ssl settings, I pointed my 'keystore', 'mock keystore' and 'mock truststore' to my local keystore. Also enabled mock ssl. Its not mandatory to use 8443 as mock port as advised everywhere on net, I just used port 9443 and it worked.

Make sure to call your mock service over https instead http.