Generate keys and start a TLS listener using socat

start_tls_listener.sh

#!/bin/bash

FILENAME=server

# Generate a public/private key pair:
if [ ! -f "$FILENAME.key" ]; then
        openssl genrsa -out "$FILENAME.key" 1024
fi

# Generate a self signed certificate:
if [ ! -f "$FILENAME.crt" ]; then
        openssl req -new -key "$FILENAME.key" -x509 -sha256 -days 3653 -out "$FILENAME.crt"
fi

# Generate the PEM file by just appending the key and certificate files:
if [ ! -f "$FILENAME.pem" ]; then
        cat "$FILENAME.key" "$FILENAME.crt" > "$FILENAME.pem"
fi

# Run listener over TLS
echo '[+] Starting TLS listener...'
sudo socat -v -v openssl-listen:443,reuseaddr,fork,cert="$FILENAME.pem",cafile="$FILENAME.crt",verify=0 -