Script to generate csr, key and crt

csr_conf.template

[ req ]
distinguished_name="req_distinguished_name"
prompt="no"

[ req_distinguished_name ]
C="<country>"
ST="<state>"
L="1234"
O="1234"
CN="{DOMAIN}"

generate_key.sh

#!/bin/bash

KEY_NAME=$1
DOMAIN=$2

# Fetch CSR Conf
cat csr_conf.template | sed s/{DOMAIN}/${DOMAIN}/ > ${KEY_NAME}_csr.conf

# Generate key and csr
openssl req -config ${KEY_NAME}_csr.conf -new -newkey rsa:2048 -nodes -keyout ${KEY_NAME}.key -out ${KEY_NAME}.csr

# Self sign cert
openssl req -x509 -nodes -days 365 -key ${KEY_NAME}.key -in ${KEY_NAME}.csr -out ${KEY_NAME}.crt