Create a Wildcard SubjectAltName Self-Signed Certificate

generate.sh

#!/usr/bin/env bash

# See: http://apetec.com/support/GenerateSAN-CSR.htm
# See: http://fbcs.co.uk/self-signed-multiple-domain-ssl-certificates/
# See: https://gist.github.com/scottvrosenthal/5691305

# Make a temp directory and go there
TMP_DIR=$(mktemp -d)
cd $TMP_DIR
echo $(pwd)

# Create an OpenSSL configuration file
cp /etc/ssl/openssl.cnf openssl.cnf

# EDIT The file
# See: http://fbcs.co.uk/self-signed-multiple-domain-ssl-certificates/

# Generate the private key
openssl genrsa 4096 > private.key

# Generate the certificate
openssl req -new -x509 -nodes -sha256 -days 3650 -key private.key -out wild-san.crt -config openssl.cnf