1 #!/bin/sh

     2 

     3 echo | openssl s_client  -connect $1:$2 2>/dev/null | \

     4 sed -n '/-----BEGIN CERTIFICATE-----/,/-----END CERTIFICATE-----/p' | \

     5 openssl x509 -enddate | grep notAfter| awk -F= '{print $2}' | \

     6 while read l; do

     7 	t=`date -j -f "%b %d %T %Y %Z" "$l" +%s`

     8 	n=`date +%s`

     9 	echo `expr $t - $n`

    10 done