#!/bin/sh

echo | openssl s_client  -connect $1:$2 2>/dev/null | \
sed -n '/-----BEGIN CERTIFICATE-----/,/-----END CERTIFICATE-----/p' | \
openssl x509 -enddate | grep notAfter| awk -F= '{print $2}' | \
while read l; do
	t=`date -j -f "%b %d %T %Y %Z" "$l" +%s`
	n=`date +%s`
	echo `expr $t - $n`
done