The Payment Card Industry (PCI) Council has mandated that early versions of TLS be retired from service. All organizations that handle credit card information are required to comply with this standard. As part of this obligation, PayPal and Braintree are updating its services to require TLS 1.2 for all HTTPS connections. PayPal and Braintree will also require HTTP/1.1 for all connections.

You may find more official relevant information at the PayPal Technical Support website:

• TLS 1.2 and HTTP/1.1 Upgrade Microsite
• 2016 Merchant Security Roadmap Microsite
• SSL Certificate Upgrade Microsite

Merchants should verify that all of their systems are capable of using the TLSv1.2 protocol with a SHA-256 certificate. In most cases this means ensuring that you are up to date with security updates, including current versions of operating systems, encryption libraries, and runtime environments.

PayPal and Braintree are making this upgrade alongside the rest of the payments industry. All credit card processors must make these changes by the PCI deadline, so you should expect to see similar announcements from other payment providers you might use.

To help merchants get started, we've put together a few notes for common environments. These checks assume that you have installed all the libraries required by the PayPal REST and Braintree SDKs. For these checks to be valid, they must be run on a production system or one that exactly matches the configuration you have in production.

• The TLS version can be set via SSLContext.
• The latest Java (currently 8) is preferred. In Java 8, TLSv1.2 is used by default when a TLS version is not specified.

To check Java, first verify that Java runtime 6 or higher is installed by running java -version from command line. If you have Java 5 or below, please upgrade it first. Then download the provided test application. And in a shell on your production system, run: > java -jar TlsCheck.jar

• On success, Successfully connected to TLS 1.2 endpoint. is printed.
• On failure, Failed to connect to TLS 1.2 endpoint. is printed.

• PayPal
• Braintree

The .NET 4.5 (or greater) runtime must be installed for TLSv1.2 to be enabled.

• The TLS version can be set via ServicePointManager.SecurityProtocol.

To check .NET, first verify you have .NET framework 4.5 or higher by running NetFrameworkVersions on the console of your production system. If you do not have .NET 4.5 or above, please upgrade it first.

Then, run TlsCheck in a shell on your production system: > TlsCheck.exe

• On success, PayPal_Connection_OK is printed.

• PayPal
• Braintree

PHP uses the system supplied curl library. The curl library requires OpenSSL 1.0.1c or higher. You may also need to update your SSL/TLS libraries.

NOTE:

• There are three places where you will find OpenSSL:
  • OpenSSL installed in your Operating System openssl version.
  • OpenSSL extension installed in your PHP. This can be found in your php.ini.
  • OpenSSL used by PHP_CURL. curl_version().
• All these three OpenSSL extensions can be different, and can be updated separately.
• The one PayPal or any other PHP SDK uses to make HTTP connections is the PHP_CURL (option 3). PHP_CURL OpenSSL is the one that needs to support TLSv1.2.
• php_curl library uses its own version of OpenSSL library, which is not the same as one used by PHP (openssl.so file that is in php.ini).
• the openssl_version information of curl can be found by running

php -r 'echo json_encode(curl_version(), JSON_PRETTY_PRINT);'

• The php_curl version shown here could be different from the openssl version, as they are two different components.
• Please keep in mind when updating your OpenSSL libraries, you need to update php_curl OpenSSL version and not the OS OpenSSL version.

To check PHP, in a shell on your production system:

1. Download cacert.pem.
2. Download TlsCheck.php.
3. Run php -f TlsCheck.php.

• On success, PayPal_Connection_OK is printed.
• On failure, curl_error information will be printed. This will help you determine the openssl version used.

Note: Please make sure that your command line test is using the same versions of PHP & SSL/TLS libraries as your web server Note: If you are using MAMP or XAMPP as your development setup, currently the PHP packaged with them comes with a lower version of OpenSSL, which currently cannot be updated easily. You can find more information on this issue and find a temporary workaround here

Python uses the system supplied OpenSSL. TLSv1.2 requires OpenSSL 1.0.1c or higher.

To check Python, in a shell on your production system, run:

For Python 2.x:

$ python -c "import urllib2; print(urllib2.urlopen('https://tlstest.paypal.com/').read())"

For Python 3.x:

$ python -c "import urllib.request; print(urllib.request.urlopen('https://tlstest.paypal.com/').read())"

• On success, PayPal_Connection_OK is printed.
• On failure, an URLError will be raised:
  urllib2.URLError: <urlopen error EOF occurred in violation of protocol (_ssl.c:590)> urllib2.URLError: <urlopen error [Errno 54] Connection reset by peer>

Ruby 2.0.0 or above is required to use TLSv1.2 from the system supplied OpenSSL. TLSv1.2 requires OpenSSL 1.0.1c or higher. Therefore, both Ruby > 2.0.0 and OpenSSL > 1.0.1c are required. You may also need to run bundle update to update your dependencies.

For the PayPal legacy Ruby SDK (packaged as PP_Ruby_NVP_SDK.zip), please download this update.

To check Ruby, in a shell on your production system, run:

$ ruby -r'net/http' -e 'puts Net::HTTP.get(URI("https://tlstest.paypal.com/"))'

• On success, PayPal_Connection_OK will be printed.
• On failure, a OpenSSL::SSL::SSLError or EOFError will be thrown.

Node.js uses the system supplied OpenSSL. TLSv1.2 requires OpenSSL 1.0.1c or higher.

To check Node, in a shell on your production system, run:

$ node -e "var https = require('https'); https.get('https://tlstest.paypal.com/', function(res){ console.log(res.statusCode) });"

• On success, 200 is printed.
• On failure, a network error is printed.

TLSv1.2 was made default for client connections in API 20 (Android 4.4W "KitKat - wearable extensions").

All Android app developers will want to make sure their code and PayPal or Braintree SDKs provide explicit support for TLSv1.2. Apps should be tested on Android 4.1-4.4 (API 16-19) devices to verify correct implementation.

After the TLSv1.2 upgrade, native app support for user devices older than API 16 (Android 4.1 "Jelly Bean") will not be available. Fortunately, as of September 5, 2016, Google reports 3.0% of devices accessing the Play store are API 15 or earlier.

Users of the PayPal or Braintree Android SDKs should simply update to the latest version. Outside the SDK, we've provided an example Android app to illustrate how to support TLSv1.2.

• PayPal
• Braintree

TLSv1.2 support was introduced in iOS 5. The PayPal iOS SDK and the Braintree iOS SDK both require iOS 7 or higher. Apps built since 2013 will likely not need any updates.

Neither PayPal, nor Braintree support any Windows SDKs. For a web browser integration, we recommend Braintree v.zero for JavaScript.