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/**
* Akamai {OPEN} EdgeGrid Auth for PHP
*
* @author Davey Shafik <dshafik@akamai.com>
* @copyright Copyright 2016 Akamai Technologies, Inc. All rights reserved.
* @license Apache 2.0
* @link https://github.com/akamai-open/AkamaiOPEN-edgegrid-php
* @link https://developer.akamai.com
* @link https://developer.akamai.com/introduction/Client_Auth.html
*/
namespace Akamai\Open\EdgeGrid\Authentication;
/**
* Generates a random nonce for each request
*
* @package Akamai\Open\EdgeGrid\Authentication
*/
class Nonce
{
/**
* @var string The current random function to use
*/
protected $function;
/**
* Constructor
*
* Determines if PHP 7's random_bytes() can be used
*/
public function __construct()
{
$this->function = 'openssl_random_pseudo_bytes';
// Use PHP 7's random_bytes()
if (function_exists('random_bytes')) {
$this->function = 'random_bytes';
}
}
/**
* Return the nonce when cast to string
*
* @return string Returns the nonce
*/
public function __toString()
{
// because ($this->function)() won't work til PHP 7 :(
$function = $this->function;
return bin2hex($function(16));
}
}