SSL terminating tunnel using ghostunnel

From time to time the need for a simple SSL terminating tunnel is wanted. This is used to enable the browser to use an HTTPS connection to an HTTP server. It is common to use a proxy server, but I was curious if there was something simpler. I was able to create an SSL tunnel using ghostunnel

https://github.com/ghostunnel/ghostunnel

To build it for MacOS 14.7 I needed to update the go.mod to use toolchain go1.22.7 (instead of toolchain go1.22.4).

Created the cert and key

openssl req \
  -x509 \
  -newkey rsa:4096 \
  -keyout key.pem \
  -out cert.pem \
  -sha256 \
  -days 3650 \
  -nodes \
  -subj "/C=US/ST=RI/L=Providence/O=MojoTech/OU=Labs/CN=clientsite.com"

Add the client's domain name to /etc/hosts

127.0.0.1 clientsite.com

Run the tunnel

sudo ghostunnel server \
  --listen clientsite.com:443 \
  --target localhost:3000 \
  --cert cert.pem \
  --key key.pem \
  --disable-authentication

Run Python's file directory serving http server

python3 -m http.server 3000

And finally, open https://clientsite.com in the browser or with curl

curl -k https://clientsite.com

I think since this is Go and executables are statically linked, you could share the ghostunnel executable and PEMs with other developers.