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New Payflow requirement: TLS 1.2 & HTTP/1.1

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#1   HowardR

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Posted 20 March 2017 - 12:58

I just got a notice from PayPal that, starting in June 2017, versions older than TLS 1.2 and HTTP/1.1 will not be able to communicate with Payflow.  Are we covered in Version 2.3.4?  How about my stores that still run 2.3.3 - will I need to upgrade to 2.3.4 before June?



Edited by HowardR, 20 March 2017 - 13:00.

#2   mattjt83

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Posted 20 March 2017 - 13:01

I believe if you are using the PayPal App and are up to date with it you should be fine.


#3   Harald Ponce de Leon

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Posted 20 March 2017 - 13:02

If you can connect to the sandbox server now then you will be able to continue to connect to the live server with TLS v1.2. The sandbox server already requires TLS v1.2 connections.


If you cannot connect to the sandbox server, it is recommended to upgrade to the latest PayPal App version which has a configuration parameter to test and force TLS v1.2 connections.


More information about the TLS v1.2 setting in the PayPal App can be read at:



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#4   John W

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Posted 20 March 2017 - 14:07

The server OS sets the level of encryption possible and you can test your ssl at https://www.ssllabs.com/

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#5   HowardR

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Posted 02 April 2017 - 14:35

I think I finally understand the TLS 1.2 issue.  This is a very serious issue. There are a lot of OSCommerce owners that will wake up to a nasty surprise on May 1. Those of you who are not new to this, please let me know if I am wrong in any of my statements below:


1. This only affects PayFlow, if you have PayPal Express Checkout also installed in your store, that should keep working. So you won't be able to accept Credit Cards, but you will be able to still accept PayPal payments.


2. PayPal threatened to require TLS 1.2 on May 1, 2016. but they relented. Now they say that they are going to require it on May 1, 2017. I think that they are going to follow through this time.


3. If you have an older PayPal PayFlow module installed, it will stop working on May 1. If you have version 3.1 of the PayFlow module installed on May 1, you are OK.


4. There are two versions of 3.1 on addons created by Harald Ponce de Leon. Both work. The best one is the newest:



5. These versions require TLS 1.2  (the latest security standard)  which does not run on OpenSSL 0.9.8, which just happens to be the version of Open SSL that is installed on most servers these days, due to security problems that were encountered with early versions of OpenSSL 1.0.1 and 1.0.2.  You can test which version of TLS 1.2 that you have by using the following php code in a simple php file on your system:


<?php function get_tls_version($sslversion = null)


$c = curl_init();

curl_setopt($c, CURLOPT_URL, "https://www.howsmyssl.com/a/check");

curl_setopt($c, CURLOPT_RETURNTRANSFER, true);

if ($sslversion !== null)


curl_setopt($c, CURLOPT_SSLVERSION, $sslversion);


$rbody = curl_exec($c);

if ($rbody === false)


$errno = curl_errno($c);

$msg = curl_error($c);


return "Error! errno = " . $errno . ", msg = " . $msg;




$r = json_decode($rbody);


return $r->tls_version;



echo "<pre>\n";

echo "OS: " . PHP_OS . "\n";

echo "uname: " . php_uname() . "\n"; echo "PHP version: " . phpversion() . "\n";

$curl_version = curl_version();

echo "curl version: " . $curl_version["version"] . "\n";

echo "SSL version: " . $curl_version["ssl_version"] . "\n"; echo "SSL version number: " . $curl_version["ssl_version_number"] . "\n"; echo "OPENSSL_VERSION_NUMBER: " . dechex(OPENSSL_VERSION_NUMBER) . "\n"; echo "TLS test (default): " . get_tls_version() . "\n"; echo "TLS test (TLS_v1): " . get_tls_version(1) . "\n"; echo "TLS test (TLS_v1_2): " . get_tls_version(6) . "\n"; echo "</pre>\n";



So, if you have a store that uses PayFlow and you are using an older PayPal module, you could find yourself in deep doodoo on May 1. You better start making the transition today.

Edited by HowardR, 02 April 2017 - 14:36.

#6   HowardR

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Posted 09 April 2017 - 13:32

Actually, the deadline is the *end* of May, not the beginning. Also, the June 9, 2014, add-on has the PayFlow modules while the March 17, 2017 version has other PayPal payment modules as well as some admin improvements that work with the PayFlow modules.

#7   HowardR

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Posted 12 April 2017 - 14:42

Now PayPal says that we have until the end of June before the change goes into affect.