Domain lookup, including whois & certificate info. Supports pasting URLs, not just hostnames.

dinfo.sh

#!/bin/bash
# Get IP Geo & Org info from domain names.
# Requires jq, curl, dig, whois

lookup=${@: -1}
fqdn=`echo $lookup | cut -d'/' -f3 | cut -d':' -f1`
domain=$(expr match "$fqdn" '.*\.\(.*\..*\)')

doCert=0
doWhois=0

while getopts 'wch' flag; do
  case "${flag}" in
    w) doWhois=1 ;;
    c) doCert=1 ;;
    h) ;;&
    *)
    echo -e "dinfo [hostname or url]"
    echo -e "-c: enable certificate check"
    echo -e "-w: enable whois lookup"
    exit 1 ;;
  esac
done

if [ -z "$domain" ]
then
  domain=$fqdn
fi

cyan='\e[36m'
clear="\e[39m"
if [ -z "$fqdn" ]
then
  echo "Could not extract domain"
  exit 1
else
  ip=`dig +short $fqdn | tail -n1`
  ipinfo=`curl -s https://ipinfo.io/$ip`
  
  echo -e "FQDN:       $cyan$fqdn$clear"
  echo -e "IP:         $cyan`echo "$ipinfo" | jq -r '.ip'`$clear"
  echo -e "Hostname:   $cyan`echo "$ipinfo" | jq -r '.hostname'`$clear"
  echo -e "Location:   $cyan[`echo "$ipinfo" | jq -r '.country'`] `echo "$ipinfo" | jq -r '.city'` `echo "$ipinfo" | jq -r '.region'`$clear"
  echo -e "Org:        $cyan`echo "$ipinfo" | jq -r '.org'`$clear"
  echo -e "More:      $cyan https://ipinfo.io/`echo -e $ipinfo | jq -r '.ip'`$clear"

  if [[ $doCert == 1 ]]
  then
    certificate=`curl -fv https://$fqdn 2>&1 | awk 'BEGIN { cert=0 } /^\* SSL connection/ { cert=1 } /^\*/ { if (cert) print }'`
    certvalid=`echo -e "$certificate" | grep "SSL certificate verify ok"`
    if [ -n "$certvalid" ]
    then
      echo -e ""
      echo -e "Cert CN:    $cyan`echo -e \"$certificate\"|  grep "subject: " | awk -F 'CN=' '{print $2}'`$clear"
      echo -e "Cert CA:    $cyan`echo -e \"$certificate\"| grep "issuer: " | awk -F '; ' '{print $2}' | awk -F 'O=' '{print $2}'`$clear"
      echo -e "Cert Valid:$cyan`echo -e \"$certificate\"| grep "start date" | awk -F 'date:' '{print $2}'` -`echo -e \"$certificate\"| grep "expire date" | awk -F 'date:' '{print $2}'`$clear"
      echo -e "More:      $cyan https://www.ssllabs.com/ssltest/analyze.html?d=$fqdn&hideResults=on$clear"
    fi
  fi


  if [[ $doWhois == 1 ]]
  then
    whois=`whois $domain`
    echo -e ""
    echo -e "Domain:     $cyan$domain$clear"
    echo -e "Registrar: $cyan`echo -e \"$whois\"| grep Registrar: | tail -n1 | awk -F ':' '{print $2}'` (`echo -e \"$whois\"| grep \"Registrar URL:\" | tail -n1 | awk -F 'URL: ' '{print $2}'`)$clear"
    echo -e "Reg Dates: $cyan C:`echo -e \"$whois\"| grep \"Creation Date:\" | head -n1 | awk -F 'Date: ' '{print $2}' | awk -F 'T' '{print $1}'` U:`echo -e \"$whois\"| grep \"Updated Date:\" | head -n1 | awk -F 'Date: ' '{print $2}' | awk -F 'T' '{print $1}'` E:`echo -e \"$whois\"| grep \"Expiration Date:\" | head -n1 | awk -F 'Date: ' '{print $2}' | awk -F 'T' '{print $1}'`$clear"
    echo -e "Nameserver:$cyan`echo -e \"$whois\"| grep \"Name Server:\" | head -n1 | awk -F ':' '{print $2}'`$clear"
    echo -e "More:      $cyan https://whois.icann.org/en/lookup?name=$domain$clear"
  fi

fi