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PHP curl FTPes w/ explicit TLS/SSL

由 ＊爱你＆永不变心＊ 提交于 2019-12-03 16:28:34

The curl obviously tries to use an implicit FTP (as it initializes TLS/SSL session even before any FTP commands are exchanged with the server).

It's because you have specified the ftps:// prefix, which is used for the implicit TLS. It has the special prefix, because the implicit TLS uses a special port (990). But you overrode the default with CURLOPT_PORT.

While the explicit TLS uses the standard FTP port (21), so it uses the standard ftp:// prefix. To enable the explicit TLS, use the CURLOPT_USE_SSL (what you are doing already, just via a wrong value, the option type is enumeration, not boolean).

So the code should be:

$server_data = array(
   ...
   'post_url' => "ftp://ftps.widgetsltd.com", // ftp:// URL
   ...
);

curl_setopt($ch, CURLOPT_URL, sprintf("%s/%s", $server_data['post_url'], $filename));
curl_setopt($ch, CURLOPT_USE_SSL, CURLUSESSL_ALL); // Enable TLS/SSL

Note that the CURLOPT_FTP_SSL is obsoleted and is an alias to the CURLOPT_USE_SSL. So, it does not make sense to set both.

Try removing s from the ftps:// I setup a test server and saw the same error with ftps vs ftp.

   'post_url' => "ftp://ftps.widgetsltd.com",

I was getting the same error message as you trying to get my FTPS connection working with PHP and cURL. The error I was getting is: curl_errno 28 - SSL connection timeout.

I finally got it working using the following code. I realize this question has already been answered but I'd like to provide my working code in an effort to help others.

Here's how I used PHP and cURL to upload a file to a FTPS server:

<?php
// !!! MAKE SURE SERVER ADDRESS STARTS WITH ftp://...
$ftp_server="ftp://ftps.example.com";  
$ftp_user_name="USERNAME";
$ftp_user_pass="PASSWORD";

$localFileName = "test.txt";
$remoteFileName = "/Export/test.txt";

$fp = fopen($localFileName, 'r');
$stderr = fopen("curl.txt", "w"); //for error msg logging

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $ftp_server.$remoteFileName);
curl_setopt($ch, CURLOPT_PORT, 21);
curl_setopt($ch, CURLOPT_USERPWD, "$ftp_user_name:$ftp_user_pass");
curl_setopt($ch, CURLOPT_UPLOAD, 1);
curl_setopt($ch, CURLOPT_INFILE, $fp);
curl_setopt($ch, CURLOPT_INFILESIZE, filesize($localFileName));
//SSL stuff
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);  //use for development only; unsecure 
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);  //use for development only; unsecure
curl_setopt($ch, CURLOPT_FTP_SSL, CURLOPT_FTPSSLAUTH);
curl_setopt($ch, CURLOPT_FTPSSLAUTH, CURLFTPAUTH_TLS); 
//curl_setopt($ch, CURLOPT_SSLVERSION, 3);
//end SSL
curl_setopt($ch, CURLOPT_VERBOSE, TRUE);
curl_setopt($ch, CURLOPT_STDERR, $stderr);
curl_setopt($ch, CURLOPT_TIMEOUT, 10);

curl_exec ($ch);

$error_no = curl_errno($ch);
$error_msg = curl_error($ch);

curl_close ($ch);
fclose($fp);
fclose($stderr);

if ($error_no == 0) 
{
    $status = "Success";
} 
else
{
    $status = "Failed"; 

}

echo "FTP RESULT: <BR/>error_no: ".$error_no . "<br/>msg: " . $error_msg;
?>
标签
php
ssl
curl
ftp
ftps
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