show ssl fingerprints for remote hosts

fingerprint.sh

#!/bin/sh

if [ -z "$1" ]; then
  echo "Usage: `basename $0` hostname [hostname]..."
  exit $E_NOARGS
fi

until [ -z "$1" ]; do
  host=$1

  if [[ $host != *:* ]]; then
    host="$host:443"
  fi

  cert=`echo | openssl s_client -connect $host 2>/dev/null`

  echo "= $host ="
  echo "$cert" | openssl x509 -noout -fingerprint -md5
  echo "$cert" | openssl x509 -noout -fingerprint -sha1
  echo "$cert" | openssl x509 -noout -fingerprint -sha256
  echo

  shift
done