title: Getting "curl: (58) unable to use client certificate" with calls using p12 file
body: <p>I created a p12 file on my MacOS ElCaptain, using a <code>.pem</code> and <code>.key</code> file via openssl command :</p>
  
  <pre><code>openssl pkcs12 -export -in &lt;PEM_file&gt;.pem -inkey &lt;PRIVATE_KEY&gt;.key -out &lt;FILENAME&gt;.p12
  </code></pre>
  
  <p>Everything went ok. I was able to make my cURL calls using this p12.</p>
  
  <p>When I did the same on my Ubuntu 14.04.5 LTS (with the same <code>.pem</code> and <code>.key</code>), I started to receive this message when I used cURL with the p12:</p>
  
  <pre><code>curl: (58) unable to use client certificate (no key found or wrong pass phrase?)
  </code></pre>
  
  <p>What I am missing?</p>