#!/bin/bash
# 
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
# 
#   http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#

DOMAIN_CHECKLIST=/etc/zabbix/domain_checklist
EXPIRES_IN_DAYS=28

while IFS="" read domain; do
    data=`echo |openssl s_client -servername $domain -connect $domain:443 2>/dev/null | openssl x509 -noout -checkend $(( $EXPIRES_IN_DAYS * 86400 )) >& /dev/null && echo good || echo "$domain expires in less than $EXPIRES_IN_DAYS days"`
    if [ "$data" != "good" ]; then
        echo $data
    fi
done < $DOMAIN_CHECKLIST
