title: How can i convert from PKCS1 to PKCS8
body: <p>How can i convert a 'PKCS1' 'PEM',which was encoded using 'PemWriter.class' from 'BouncyCastle',into a 'PKCS8' format? 
  Also i must specify that i don't want to use any sun.* package.</p>
  
  <p>Thank you!</p>