openssl hangs and does not exit

Question

I am trying to use openssl to get a certificate, and it seems to keep hanging. I have done a lot of research but not all of the available options seem to work on Windows.

Answer 1

For reasons i do not completeley understand, echoing QUIT or quit\n into the input did not work in my case. I'm using MINGW64 with OpenSSL 1.0.2d on Windows 8.1, and i'm using openssl to get certificates from servers inside a bash script. However, just running the openssl command in background and waiting a bit worked for me:

#!/bin/bash

openssl s_client -connect my.server.com:443 -showcerts > output.txt 2>/dev/null &
sleep 2