SSL/TLS cert check using openssl

sslcheck.sh

#!/usr/bin/env bash
set -euo pipefail

SERVERNAME=${1:-""}
PORT=${2:-443}

if [[ -z "${SERVERNAME}" ]]; then
    printf "Usage:\n"
    printf "   sslcheck <servername>\n"
    printf "   sslcheck <servername> <port>\n"
    exit -1
fi

printf "host ${SERVERNAME}\n"
host "${SERVERNAME}"

printf "\n\n"

printf "echo QUIT | openssl s_client -connect ${SERVERNAME}:${PORT} -servername ${SERVERNAME} 2> /dev/null | openssl x509 -noout -dates -subject -issuer\n\n"
echo QUIT | openssl s_client -connect ${SERVERNAME}:${PORT} -servername ${SERVERNAME} 2> /dev/null | openssl x509 -noout -dates -subject -issuer