title: cURL is unable to use client certificate , in local server
body: <p>I set up a local server using XAMPP. I have two PHP scripts , a sender and a receiver. I am trying to send an XML file from the sender to the receiver using HTTP over SSL (HTTPS).</p>
  
  <p>I created a self signed certificate, configured XAMPP, and I am using this code on my sender :</p>
  
  <pre><code>&lt;?php
    /*
     * XML Sender/Client.
     */
    // Get our XML. You can declare it here or even load a file.
  
  
    $xml = file_get_contents("data.xml");
  
    // We send XML via CURL using POST with a http header of text/xml.
    $ch = curl_init();
  
    //curl_setopt($ch, CURLOPT_SSLVERSION,3);
  
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
  
    curl_setopt($ch, CURLOPT_CAINFO,  getcwd().'ipm.crt');
    curl_setopt($ch, CURLOPT_SSLCERT, getcwd().'ipm.pem');
  
    curl_setopt($ch, CURLOPT_SSLCERTPASSWD,'pass');
  
    //i use this line only for debugging through fiddler. Must delete after done with debugging.
    curl_setopt($ch, CURLOPT_PROXY, '127.0.0.1:8888');
  
    // set URL and other appropriate options
    curl_setopt($ch, CURLOPT_URL, "https://ipv4.fiddler/iPM/receiver.php");
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Content-Type: text/xml'));
    curl_setopt($ch, CURLOPT_HEADER, 0);
    curl_setopt($ch, CURLOPT_POST, 1);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $xml);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 0);
    curl_setopt($ch, CURLOPT_REFERER, 'https://ipv4.fiddler/iPM/receiver.php');
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    $ch_result = curl_exec($ch);
    echo "Result = ".$ch_result;
  
    echo 'Curl error: ' . curl_error($ch);
  
    curl_close($ch);
    // Print CURL result.
  ?&gt;
  </code></pre>
  
  <p>However i always get this error : <code>Curl error: unable to use client certificate (no key found or wrong pass phrase?)</code></p>
  
  <p>What can i possibly do wrong? The passphrase IS the word <code>pass</code> .</p>
  
  <p>I created my .crt by doing :</p>
  
  <pre><code>openssl req -config openssl.cnf -new -out ipm.csr -keyout ipm.pem
  
  openssl rsa -in ipm.pem -out ipm.key
  
  openssl x509 -in ipm.csr -out ipm.crt -req -signkey ipm.key -days 365
  </code></pre>
  
  <p>I don't want to put the <code>SSL_VERIFYPEER</code> and <code>SSL_VERIFYHOST</code> to false.</p>