Generate a self-signed certificates using openssl

create_certs

#!/usr/bin/env bash

###############################################################################

PASSPHRASE="password1234"
LANG="ES"
LOCATION="Malaga"
CITY="Malaga"
COMPANY="Open Source"
DAYS="3650"

###############################################################################

# Check for Requeriments

curl -V > /dev/null 2>&1
if [[ $? != 0 ]]; then
    echo "Error: curl not found, please install it (i.e. apt-get install curl)"
    echo ""
    exit 1
fi

openssl version > /dev/null 2>&1
if [[ $? != 0 ]]; then
    echo "Error: openssl not found, please install it (i.e. apt-get install openssl)"
    echo ""
    exit 1
fi

###############################################################################

# Get Public IP address
MYIP=`curl -s https://ipinfo.io/ip`
if [[ $? != 0 ]]; then
    echo "Error: Can't get host IP address (no network or https://ipinfo.io is down)."
    echo ""
    exit 1
fi

# Remove any previous certs files
rm -f ./cert.pem
rm -f ./private.key

# Check and create random file if it doesn't exists (fix openssl issue...)
if [ ! -f ~/.rnd ]; then
    openssl rand -out ~/.rnd -hex 256
fi

# Create the Certificate
openssl req -newkey rsa:4096 \
            -x509 \
            -sha256 \
            -days $DAYS \
            -nodes \
            -passin pass:$PASSPHRASE \
            -out cert.pem \
            -keyout private.key \
            -subj "/C=${LANG}/ST=${LOCATION}/L=${CITY}/O=${COMPANY}/CN=$MYIP"