Poodle Fix - PHP 5.2 compatible

POODLE Fix

• Because of the Poodle vulnerability, PayPal has disabled SSLv3.
• To enable TLS encryption, the changes were made to PPHttpConfig.php in SDK Core to use a cipher list specific to TLS encryption.

    /**
     * Some default options for curl
     * These are typically overridden by PPConnectionManager
     */
    public static $DEFAULT_CURL_OPTS = array(
        CURLOPT_SSLVERSION => 1,
        CURLOPT_CONNECTTIMEOUT => 10,
        CURLOPT_RETURNTRANSFER => TRUE,
        CURLOPT_TIMEOUT        => 60,   // maximum number of seconds to allow cURL functions to execute
        CURLOPT_USERAGENT      => 'PayPal-PHP-SDK',
        CURLOPT_HTTPHEADER     => array(),
        CURLOPT_SSL_VERIFYHOST => 2,
        CURLOPT_SSL_VERIFYPEER => 1,
        CURLOPT_SSL_CIPHER_LIST => 'TLSv1',
    );

• There are two primary changes done to curl options:
  • CURLOPT_SSLVERSION is set to 1 . See here for more information
  • CURLOPT_SSL_CIPHER_LIST was set to TLSv1, See here for more information

All these changes are included in the recent release, along with many other bug fixes. We highly encourage you to update your versions, by either using composer or running this command shown below:

curl -k -L https://raw.githubusercontent.com/paypal/merchant-sdk-php/stable/samples/install.php | php    
        OR        
wget  https://raw.githubusercontent.com/paypal/merchant-sdk-php/stable/samples/install.php
php install.php