Simple certificate download script

certDownload.sh

#!/bin/bash
#---------------------------------
# Certificate Downloader
#---------------------------------

if [ $# -eq 0 ]; then
        echo -e " [>] Usage: $0 [host] [port]"     
        exit 1
fi

echo "========================================="
echo " 1. Show Certificate"
echo " 2. Show Cert. Chain"
echo "========================================="
echo -n " [>] "
read SHOW
case $SHOW in
  1)
		openssl s_client -connect $1:$2 >/tmp/downloadServerCert.tmp </dev/null
	;;
	2)
		openssl s_client -connect $1:$2 -showcerts >/tmp/downloadServerCert.tmp </dev/null
	;;
esac
START="n"
exec</tmp/downloadServerCert.tmp
while read line; do
    if [ "$line" == "-----BEGIN CERTIFICATE-----" ]; then
        START="y"
    fi
    if [ "$line" == "-----END CERTIFICATE-----" ]; then
        echo -e "$line"
        START="n"
    fi
    if [ "$START" == "y" ]; then
        echo -e "$line"
    fi
done