Something

function ssl_modcheck() {
	HOSTNAME=$1
	KEYFILE="/etc/ssl/${HOSTNAME}_key"

	if [ -f "${KEYFILE}.nopass" ] && [ -f "${KEYFILE}" ]; then
		if [ $(stat -c %Y "${KEYFILE}.nopass") -gt $(stat -c %Y "${KEYFILE}") ]; then
			diff --brief <(openssl x509 -modulus -noout -in /etc/ssl/${HOSTNAME}_crt) <(openssl  rsa -modulus -noout -in /etc/ssl/${HOSTNAME}_key.nopass)
		else
			diff --brief <(openssl x509 -modulus -noout -in /etc/ssl/${HOSTNAME}_crt) <(pp | openssl  rsa -modulus -noout -passin fd:0 -in /etc/ssl/${HOSTNAME}_key)
		fi
	elif [ -f "${KEYFILE}.nopass" ]; then
		diff --brief <(openssl x509 -modulus -noout -in /etc/ssl/${HOSTNAME}_crt) <(openssl  rsa -modulus -noout -in /etc/ssl/${HOSTNAME}_key.nopass)
	else
		diff --brief <(openssl x509 -modulus -noout -in /etc/ssl/${HOSTNAME}_crt) <(pp | openssl  rsa -modulus -noout -passin fd:0 -in /etc/ssl/${HOSTNAME}_key)
   fi
}