Let's Encrypt Certificates SHA256 fingerprint

lets-encrypt-sha256.sh

#!/bin/bash

BASE_URL="https://letsencrypt.org/certs/"
CERTIFICATES="lets-encrypt-x3-cross-signed.pem lets-encrypt-x4-cross-signed.pem lets-encrypt-x1-cross-signed.pem lets-encrypt-x2-cross-signed.pem"

for CERTIFICATE in $CERTIFICATES; do
  echo "# $CERTIFICATE "
  curl --silent "${BASE_URL}${CERTIFICATE}" | openssl x509 -noout -fingerprint -sha256 -inform pem | cut -d'=' -f2 | tr '[:upper:]' '[:lower:]' | sed -e 's/://g' |
done