Issue#36: .deb deploys default TLS certificate and private key (#39)

* issue#36: Generating TLS key and self-signed cert after installing/upgrading the package

* issue#36: Updated libstdc++.a dependency to v10

* issue#36: Generate self-signed certs after install/upgrade

* issue#36: Updated dependencies

* issue#36: Check for pre-existence of key/cert

build/after-install.sh

@@ -1,6 +1,19 @@
+#!/bin/bash
+
 ETC='/opt/key-networks/ztncui/etc'
-echo "Copying default password file..."
-cp -pv $ETC/default.passwd $ETC/passwd
+if [ -f ${ETC}/passwd ]; then
+  echo "Password file aready exists"
+else
+  echo "Copying default password file..."
+  cp -pv ${ETC}/default.passwd ${ETC}/passwd
+fi
+if [ -f /opt/key-networks/ztncui/etc/tls/privkey.pem ] && [ -f /opt/key-networks/ztncui/etc/tls/fullchain.pem ]; then
+  echo "TLS key and certificate already exist"
+else
+  echo "Generating new TLS key and self-signed certificate..."
+  openssl req -x509 -sha256 -nodes -days 365 -newkey rsa:2048 -keyout /opt/key-networks/ztncui/etc/tls/privkey.pem -out /opt/key-networks/ztncui/etc/tls/fullchain.pem -subj "/C=XX/ST=YY/L=ZZ/O=Security/OU=SelfSigned/CN=example.com"
+fi
+chown ztncui.ztncui /opt/key-networks/ztncui/etc/tls/*
 echo "Enabling and starting ztncui service..."
 systemctl enable ztncui
 systemctl start ztncui