Updates prosody config to have certificates for the auth. domain.

The certificates are generated on new install or upgrade and added to the current configuration and also to the trusted certificates on the local machine.

debian/jitsi-meet-prosody.postinst

                 echo -e "\nInclude \"conf.d/*.cfg.lua\"" >> $PROSODY_CONFIG_OLD
             fi
         fi
-        # UPGRADE to server side focus check if focus is configured
-        if [ -f $PROSODY_HOST_CONFIG ] && ! grep -q "VirtualHost \"$JICOFO_AUTH_DOMAIN\"" $PROSODY_HOST_CONFIG; then
-            echo -e "\nVirtualHost \"$JICOFO_AUTH_DOMAIN\"" >> $PROSODY_HOST_CONFIG
-            echo -e "        authentication = \"internal_plain\"\n" >> $PROSODY_HOST_CONFIG
-            sed -i "s/Component \"conference.$JVB_HOSTNAME\" \"muc\"/Component \"conference.$JVB_HOSTNAME\" \"muc\"\nadmins = { \"$JICOFO_AUTH_USER@$JICOFO_AUTH_DOMAIN\" }\n/g" $PROSODY_HOST_CONFIG
-            echo -e "Component \"focus.$JVB_HOSTNAME\"" >> $PROSODY_HOST_CONFIG
-            echo -e "    component_secret=\"$JICOFO_SECRET\"\n" >> $PROSODY_HOST_CONFIG
-            PROSODY_CREATE_JICOFO_USER="true"
-        # UPGRADE to server side focus on old config(/etc/prosody/prosody.cfg.lua)
-        elif [ ! -f $PROSODY_HOST_CONFIG ] && ! grep -q "VirtualHost \"$JICOFO_AUTH_DOMAIN\"" $PROSODY_CONFIG_OLD; then
-            echo -e "\nVirtualHost \"$JICOFO_AUTH_DOMAIN\"" >> $PROSODY_CONFIG_OLD
-            echo -e "        authentication = \"internal_plain\"\n" >> $PROSODY_CONFIG_OLD
-            if ! grep -q "admins = { }" $PROSODY_CONFIG_OLD; then
-                echo -e "admins = { \"$JICOFO_AUTH_USER@$JICOFO_AUTH_DOMAIN\" }\n" >> $PROSODY_CONFIG_OLD
-            else
-                sed -i "s/admins = { }/admins = { \"$JICOFO_AUTH_USER@$JICOFO_AUTH_DOMAIN\" }\n/g" $PROSODY_CONFIG_OLD
-            fi
-            echo -e "Component \"focus.$JVB_HOSTNAME\"" >> $PROSODY_CONFIG_OLD
-            echo -e "    component_secret=\"$JICOFO_SECRET\"\n" >> $PROSODY_CONFIG_OLD
-            PROSODY_CREATE_JICOFO_USER="true"
-        fi
 
         if [ "$PROSODY_CREATE_JICOFO_USER" = "true" ]; then
             # create 'focus@auth.domain' prosody user
                 "/O=$DOMAIN/OU=$HOST/CN=$JVB_HOSTNAME/emailAddress=webmaster@$HOST.$DOMAIN" \
                 -keyout /var/lib/prosody/$JVB_HOSTNAME.key \
                 -out /var/lib/prosody/$JVB_HOSTNAME.crt
+            ln -sf /var/lib/prosody/$JVB_HOSTNAME.key /etc/prosody/certs/$JVB_HOSTNAME.key
+            ln -sf /var/lib/prosody/$JVB_HOSTNAME.crt /etc/prosody/certs/$JVB_HOSTNAME.crt
+        fi
+
+        if [ ! -f /var/lib/prosody/$JICOFO_AUTH_DOMAIN.crt ]; then
+            HOST="$( (hostname -s; echo localhost) | head -n 1)"
+            DOMAIN="$( (hostname -d; echo localdomain) | head -n 1)"
+            openssl req -new -newkey rsa:4096 -days 365 -nodes -x509 -subj \
+                "/O=$DOMAIN/OU=$HOST/CN=$JICOFO_AUTH_DOMAIN/emailAddress=webmaster@$HOST.$DOMAIN" \
+                -keyout /var/lib/prosody/$JICOFO_AUTH_DOMAIN.key \
+                -out /var/lib/prosody/$JICOFO_AUTH_DOMAIN.crt
+
+            AUTH_KEY_FILE="/etc/prosody/certs/$JICOFO_AUTH_DOMAIN.key"
+            AUTH_CRT_FILE="/etc/prosody/certs/$JICOFO_AUTH_DOMAIN.crt"
+
+            ln -sf /var/lib/prosody/$JICOFO_AUTH_DOMAIN.key $AUTH_KEY_FILE
+            ln -sf /var/lib/prosody/$JICOFO_AUTH_DOMAIN.crt $AUTH_CRT_FILE
+            ln -sf /var/lib/prosody/$JICOFO_AUTH_DOMAIN.crt /usr/local/share/ca-certificates/$JICOFO_AUTH_DOMAIN.crt
+
+            update-ca-certificates
+
+            # now let's add the ssl cert for the auth. domain (we use # as a sed delimiter cause filepaths are confused with default / delimiter)
+            sed -i "s#VirtualHost \"$JICOFO_AUTH_DOMAIN\"#VirtualHost \"$JICOFO_AUTH_DOMAIN\"\n    ssl = {\n        key = \"$AUTH_KEY_FILE\";\n        certificate = \"$AUTH_CRT_FILE\";\n    \}#g" $PROSODY_HOST_CONFIG
+
+            # trigger a restart
+            PROSODY_CONFIG_PRESENT="false"
         fi
-        ln -sf /var/lib/prosody/$JVB_HOSTNAME.key /etc/prosody/certs/$JVB_HOSTNAME.key
-        ln -sf /var/lib/prosody/$JVB_HOSTNAME.crt /etc/prosody/certs/$JVB_HOSTNAME.crt
 
         if [ "$PROSODY_CONFIG_PRESENT" = "false" ]; then
             invoke-rc.d prosody restart