cURL SSL unable to get local issuer certificate on Xampp

[Matthew Snow]

I'm running Xampp 1.8.3 for windows (my machine is x64) which comes with PHP 5.5.3 included with cURL enabled by default. I've installed a fresh new copy and am trying to test a connection to mozilla.org over ssl with cURL using a .pem file I extracted from the site's certificate using FireFox 24. But I'm getting the error "unable to get local issuer certificate". Here is my code:

<?php // Set the URL to visit $url = "https://www.mozilla.org/en-US/"; // Set .pem file to use $certFile = dirname(__FILE__) . '\www.mozilla.org.crt'; // In this example we are referring to a page that handles xml $headers = array( "Content-Type: text/xml",); // Initialise Curl $curl = curl_init($url); if ($curl === false) throw new Exception(' cURL init failed'); // Set up to view correct page type curl_setopt($curl, CURLOPT_HTTPHEADER, $headers); // Turn on SSL certificate verfication curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, TRUE); curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 2); curl_setopt($curl, CURLOPT_CAINFO, $certFile); // Tell the curl instance to talk to the server using HTTP POST curl_setopt($curl, CURLOPT_POST, 1); // 1 second for a connection timeout with curl curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 5); // Try using this instead of the php set_time_limit function call curl_setopt($curl, CURLOPT_TIMEOUT, 60); // Causes curl to return the result on success which should help us avoid using the writeback option curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); echo "Connecting to " . $url . "<br/>"; echo "Using " . $certFile . "<br/>"; echo "<br/>"; if(curl_exec($curl) == false) echo ("Error: " . curl_errno($curl) . ", " . curl_error($curl) . "<br/>"); else echo "Success!" . "<br/>"; ?>

Here is the contents of the pem file:
-----BEGIN CERTIFICATE----- MIIFfjCCBGagAwIBAgICKTgwDQYJKoZIhvcNAQEFBQAwgYUxCzAJBgNVBAYTAlVT MRUwEwYDVQQKEwxHZW9UcnVzdCBJbmMxMTAvBgNVBAsTKFNlZSB3d3cuZ2VvdHJ1 c3QuY29tL3Jlc291cmNlcy9jcHMgKGMpMDYxLDAqBgNVBAMTI0dlb1RydXN0IEV4 dGVuZGVkIFZhbGlkYXRpb24gU1NMIENBMB4XDTExMTIxNTIwMzU0N1oXDTEzMTIx NjIxMjMwOFowge0xHTAbBgNVBA8TFFByaXZhdGUgT3JnYW5pemF0aW9uMRMwEQYL KwYBBAGCNzwCAQMTAlVTMRswGQYLKwYBBAGCNzwCAQITCkNhbGlmb3JuaWExETAP BgNVBAUTCEMyNTQzNDM2MQswCQYDVQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5p YTEWMBQGA1UEBxMNTW91bnRhaW4gVmlldzEbMBkGA1UEChMSTW96aWxsYSBGb3Vu ZGF0aW9uMRYwFAYDVQQLEw1JVCBPcGVyYXRpb25zMRgwFgYDVQQDEw93d3cubW96 aWxsYS5vcmcwggEiMA0GCSqGSIb3DQEBAQUAA4IBDwAwggEKAoIBAQDeOh6yffa6 EUJiq7B3gmqMopyskeIquGSmuz5lpS3ajoUezV24W/xnKHSgn87C0KBzUSjRY46I x9lHdgfDlptNv1Zt+BoRwVHuZt0IZnGYZeStg05qGY5fsznpDIfyJAWXtOaWmju7 2a1Mpvultu4AkoxD1etPZZgY/FaUSftmpYvpCaHFjL+mLdF88NvUG6OpX4/L/uTv 05OOPcjbLHvL3tw1CerOzqF6BDbB8qOh0DXAN/CF4/OS8LdLWXW2VPDXv+fMq4aw eCV+nDVn6V4sZH5rplztPXMQdZZoxSMESctd1lpFarXpd7uJ8kzrmMz9D3dIzkhL /lA9B6Dng/8BAgMBAAGjggGMMIIBiDAfBgNVHSMEGDAWgBQoxOuP8V95kKMrVcNW Tn1rU3IsGDBuBggrBgEFBQcBAQRiMGAwKgYIKwYBBQUHMAGGHmh0dHA6Ly9FVlNT TC1vY3NwLmdlb3RydXN0LmNvbTAyBggrBgEFBQcwAoYmaHR0cDovL0VWU1NMLWFp YS5nZW90cnVzdC5jb20vZXZjYS5jcnQwDgYDVR0PAQH/BAQDAgWgMB0GA1UdJQQW MBQGCCsGAQUFBwMBBggrBgEFBQcDAjAnBgNVHREEIDAegg93d3cubW96aWxsYS5v cmeCC21vemlsbGEub3JnMEIGA1UdHwQ7MDkwN6A1oDOGMWh0dHA6Ly9FVlNTTC1j cmwuZ2VvdHJ1c3QuY29tL2NybHMvZ3RleHR2YWxjYS5jcmwwDAYDVR0TAQH/BAIw ADBLBgNVHSAERDBCMEAGCSsGAQQB8CIBBjAzMDEGCCsGAQUFBwIBFiVodHRwOi8v d3d3Lmdlb3RydXN0LmNvbS9yZXNvdXJjZXMvY3BzMA0GCSqGSIb3DQEBBQUAA4IB AQDBO3AEZKza01zLPQiq3wzRXClKwW/u6D1Fznv7v7hU97luVcbkY/kNAiMerqPk hTfhtnLYIuu9ZFapv2vVdRuzY/hGc3Rieek7f/T8d0tojfjdGgXwwg9M5qaDe35a 0hbsGR1Z1DdWtuGeKPuP6dzDw2zvfcOEf0l14M/ECS2sRU3MX42Rm6BK4xH1cjac KFz+Ngwe4CivEvU4R0+MjPvmTePTyjazU+rzz5fA1JRQ7CCE00+tAAqAIAzHINlH maKUEkR+OwUDEhKc+cQUq+EBeS3ILlufJWak1HFkxRAJAnw9za1ubG+y9V7MVheL rc60KdNJLKwH5EQ0tZSx71jt -----END CERTIFICATE-----