title: Converting binary blob private key to base64 format
body: <p>So, I have a private key in binary blob format which looks like some encrypted junk. Now, what should I do in order to transform that into a correct looking private key which is usable by <code>openssl</code> ?</p>
  
  <p>For instance, I want it to be in <code>-----BEGIN PRIVATE KEY----- some base64 -----END PRIVATE KEY-----</code> format. 
  How is it possible ?</p>