Script is not capturing SSL session key need help fix the setup

[ciscohack]

Hello Expert,

I need your help to set up this helpful tool to fetch the session ID to decrypt the TLS content. I tried the setup by own but seems I am doing something wrong as it's not working and doing anything in my case.

What I did first tried the tool to setup in windows environment

and ran setup.py install follower by setup.py build command to install the dependency and necessary packages then configured the environmental variable for SSLKEYLOGFILE then created a quick python script as mentioned in the doc..

Then I ran an application to generate SSL traffic but no session key got printed in a file. I am not sure whether I did correctly or not. need your help to resolve this issue also I need help to setup the tool for Linux or macOS environment.

import os
import sslkeylog

sslkeylog.set_keylog(os.environ.get('SSLKEYLOGFILE'))  # Or directly specify a path

# Do anything involving SSL (Using the built-in ssl module)