#!/bin/sh

if [ $# -le 1 ]; then
    echo "$0 usage: [days count] file1_with_domains file2_with_domains"
    exit 1
fi

DAYS=$1
shift 1
NOW=`date -d "+$DAYS" +%s`

while [ $# -gt 0 ];
do
    file=$1
    shift 1
    if [ -e $file ]; then
	cat $file | while read host
	do
	    DATE=`echo "" | openssl s_client -connect $host 2>/dev/null | openssl x509 -noout -enddate | sed -e 's:notAfter=::'`
	    TIMESTAPM=`date -d "$DATE" +%s`
	    if [ $NOW -gt $TIMESTAPM ]; then
		echo "$host is expired less than $DAYS (`LC_ALL=C date -d @$TIMESTAPM`)"
	    fi
	done
    else
	echo "can't open $file"
    fi
done