bash function to get a certificate from a remote host

getcert.sh

# bash function to get a certificate from a remote host
function getcert {
  host=$1
  port=$2
  if [ -n $port ]; then
    port=443
  fi
  openssl s_client -connect ${host}:${port} </dev/null 2>/dev/null | sed -n '/-----BEGIN CERTIFICATE-----/,/-----END CERTIFICATE-----/p'
}