title: Issues with .keystore file
body: <p>I am having issues with converting between <code>.P7B</code> to <code>.PFX</code> using a <code>.keystore</code> private key file 
  It produces the error</p>
  
  <pre><code>unable to load private key 2388:error:0909006C:PEM
  </code></pre>
  
  <p>when i run the command</p>
  
  <pre><code>openssl pkcs12 -export -out cert.pfx -inkey privatekey.keystore -in cert.cer
  </code></pre>
  
  <p>please help</p>