Create a self-signed tls cert

generate_cert.sh

#!/bin/bash

# Creates a self-signed certificate for a given domain name
set -e

if [ $# -ne 1 ]; then
    echo "Usage: generate_cert.sh <domain-name>"
    echo
    echo "Generates a self-signed certificate for a given domain name."
    echo
    echo "Missing domain parameter"
    exit 1
fi

domain=$1

private_key=$(openssl genrsa 2048)
csr=$(openssl req -new -key <(echo "$private_key") -subj "/C=/ST=/L=/O=/OU=/CN=$domain")
cert=$(openssl x509 -req -days 3650 -in <(echo "$csr") -sha256 -signkey <(echo "$private_key"))

echo "# Private key: "
echo "$private_key"

echo "# Certificate:"
echo "$cert"