docker-mailserver/target/bin/generate-ssl-certificate

#!/bin/bash

set -e

# check if FQDN was passed as arguement in setup.sh
if [ -z "$1" ]; then
	FQDN="$(hostname --fqdn)"
else
	FQDN="$1"
fi

ssl_cfg_path="/tmp/docker-mailserver/ssl"

if [ ! -d "$ssl_cfg_path" ]; then
	mkdir "$ssl_cfg_path"
fi

cd "$ssl_cfg_path" || { echo "cd $ssl_cfg_path error"; exit; }
# Create CA certificate
/usr/lib/ssl/misc/CA.pl -newca
# Create an unpassworded private key and create an unsigned public key certificate
openssl req -new -nodes -keyout "$ssl_cfg_path"/"$FQDN"-key.pem -out "$ssl_cfg_path"/"$FQDN"-req.pem -days 3652
# Sign the public key certificate with CA certificate
openssl ca -out "$ssl_cfg_path"/"$FQDN"-cert.pem -infiles "$ssl_cfg_path"/"$FQDN"-req.pem
# Combine certificates for courier
cat "$ssl_cfg_path"/"$FQDN"-key.pem "$ssl_cfg_path"/"$FQDN"-cert.pem > "$ssl_cfg_path"/"$FQDN"-combined.pem