first commit

public/system/library/session.php

@@ -0,0 +1,90 @@
+<?php
+/**
+ * @package		OpenCart
+ * @author		Daniel Kerr
+ * @copyright	Copyright (c) 2005 - 2017, OpenCart, Ltd. (https://www.opencart.com/)
+ * @license		https://opensource.org/licenses/GPL-3.0
+ * @link		https://www.opencart.com
+*/
+
+/**
+* Session class
+*/
+class Session {
+	protected $adaptor;
+	protected $session_id;
+	public $data = array();
+
+	/**
+	 * Constructor
+	 *
+	 * @param	string	$adaptor
+	 * @param	object	$registry
+ 	*/
+	public function __construct($adaptor, $registry = '') {
+		$class = 'Session\\' . $adaptor;
+		
+		if (class_exists($class)) {
+			if ($registry) {
+				$this->adaptor = new $class($registry);
+			} else {
+				$this->adaptor = new $class();
+			}	
+			
+			register_shutdown_function(array($this, 'close'));
+		} else {
+			trigger_error('Error: Could not load cache adaptor ' . $adaptor . ' session!');
+			exit();
+		}	
+	}
+	
+	/**
+	 * 
+	 *
+	 * @return	string
+ 	*/	
+	public function getId() {
+		return $this->session_id;
+	}
+
+	/**
+	 *
+	 *
+	 * @param	string	$session_id
+	 *
+	 * @return	string
+ 	*/	
+	public function start($session_id = '') {
+		if (!$session_id) {
+			if (function_exists('random_bytes')) {
+				$session_id = substr(bin2hex(random_bytes(26)), 0, 26);
+			} else {
+				$session_id = substr(bin2hex(openssl_random_pseudo_bytes(26)), 0, 26);
+			}
+		}
+
+		if (preg_match('/^[a-zA-Z0-9,\-]{22,52}$/', $session_id)) {
+			$this->session_id = $session_id;
+		} else {
+			exit('Error: Invalid session ID!');
+		}
+		
+		$this->data = $this->adaptor->read($session_id);
+		
+		return $session_id;
+	}
+	
+	/**
+	 * 
+ 	*/
+	public function close() {
+		$this->adaptor->write($this->session_id, $this->data);
+	}
+	
+	/**
+	 * 
+ 	*/	
+	public function destroy() {
+		$this->adaptor->destroy($this->session_id);
+	}
+}