#!/bin/sh

echo -n "Certificate subject (Distinguished Name): "
read who

openssl req -new -sha1 -newkey rsa:512 -rand /dev/urandom \
  -subj "$who" -out my.req

openssl x509 -req -in my.req -signkey privkey.pem \
  -out cert.pem

openssl rsa -in privkey.pem -out key.pem