Normalizes cert filename based on subject and puts full text and encoded data in contents

normalize_cert.sh

#!/bin/bash

ORIG_CERT_FILE="${1}"
if [ ! -e "${ORIG_CERT_FILE}" ] ; then
  echo "${ORIG_CERT_FILE} filename does not exist" 1>&2
  exit 2
fi
ORIG_CERT_DIR=$(dirname $(realpath "$ORIG_CERT_FILE"))

CERT_SUBJECT="$(openssl x509 -in "${ORIG_CERT_FILE}" -noout -subject)"
if [ $? -ne 0 ] ; then
  echo "Failed to parse X509 certificate" 1>&2
  exit 2
fi

CERT_FILENAME=$(echo "${CERT_SUBJECT}" |sed -E 's/.*(\/CN\=(.*$))/\2/'|sed -e 's/[^a-zA-Z0-9,._+@%/-]/_/g;').pem
NORMALIZED_FULL_PATH="${ORIG_CERT_DIR}/${CERT_FILENAME}"
openssl x509 -in "${ORIG_CERT_FILE}" -text > "${NORMALIZED_FULL_PATH}"
if [ $? -eq 0 ] ; then
  echo "X509 certificate normalized as ${NORMALIZED_FULL_PATH}"
  exit 0
else 
  echo "Failed to normalize X509 certificate" 1>&2
  exit 2
fi