PHP - Using cURL to access HTTPS (SSL) protected sites

Question

The following code returns Exit code 58.

From cURL documentation: CURLE_SSL_CERTPROBLEM (58) problem with the local client certificate.

// create a new CURL resource
$ch = curl_init();

// set URL and other appropriate options
curl_setopt($ch, CURLOPT_URL, $URL);
curl_setopt($ch, CURLOPT_HEADER, false);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_VERBOSE, true);

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);

curl_setopt($ch, CURLOPT_SSLCERT, getcwd() . $CERT);
curl_setopt($ch, CURLOPT_SSLCERTPASSWD,"XXXXX");

curl_setopt($ch, CURLOPT_SSLVERSION, 3);

curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content Type: text/xml',
    'User-Agent: XXXXX',
    'User-Name: XXXXX'
));

$RESPONSE = curl_exec($ch);  

var_dump($RESPONSE);

// close CURL resource, and free up system resources
curl_close($ch);

Is there something I'm missing?

Answer 1

Make sure the file in getcwd() . $CERT exists and is a valid PEM certificate. If it seems ok, set the following option to get more SSL certification details output to STDERR:

curl_setopt($ch, CURLOPT_CERTINFO, true);

Note that this setting only has effect if CURLOPT_VERBOSE is set to true, which you already have.