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Diffstat (limited to 'kohana/libraries/Encrypt.php')
| -rw-r--r-- | kohana/libraries/Encrypt.php | 164 |
1 files changed, 0 insertions, 164 deletions
diff --git a/kohana/libraries/Encrypt.php b/kohana/libraries/Encrypt.php deleted file mode 100644 index 3d564f99..00000000 --- a/kohana/libraries/Encrypt.php +++ /dev/null @@ -1,164 +0,0 @@ -<?php defined('SYSPATH') OR die('No direct access allowed.'); -/** - * The Encrypt library provides two-way encryption of text and binary strings - * using the MCrypt extension. - * @see http://php.net/mcrypt - * - * $Id: Encrypt.php 4072 2009-03-13 17:20:38Z jheathco $ - * - * @package Core - * @author Kohana Team - * @copyright (c) 2007-2008 Kohana Team - * @license http://kohanaphp.com/license.html - */ -class Encrypt_Core { - - // OS-dependant RAND type to use - protected static $rand; - - // Configuration - protected $config; - - /** - * Returns a singleton instance of Encrypt. - * - * @param array configuration options - * @return Encrypt_Core - */ - public static function instance($config = NULL) - { - static $instance; - - // Create the singleton - empty($instance) and $instance = new Encrypt((array) $config); - - return $instance; - } - - /** - * Loads encryption configuration and validates the data. - * - * @param array|string custom configuration or config group name - * @throws Kohana_Exception - */ - public function __construct($config = FALSE) - { - if ( ! defined('MCRYPT_ENCRYPT')) - throw new Kohana_Exception('encrypt.requires_mcrypt'); - - if (is_string($config)) - { - $name = $config; - - // Test the config group name - if (($config = Kohana::config('encryption.'.$config)) === NULL) - throw new Kohana_Exception('encrypt.undefined_group', $name); - } - - if (is_array($config)) - { - // Append the default configuration options - $config += Kohana::config('encryption.default'); - } - else - { - // Load the default group - $config = Kohana::config('encryption.default'); - } - - if (empty($config['key'])) - throw new Kohana_Exception('encrypt.no_encryption_key'); - - // Find the max length of the key, based on cipher and mode - $size = mcrypt_get_key_size($config['cipher'], $config['mode']); - - if (strlen($config['key']) > $size) - { - // Shorten the key to the maximum size - $config['key'] = substr($config['key'], 0, $size); - } - - // Find the initialization vector size - $config['iv_size'] = mcrypt_get_iv_size($config['cipher'], $config['mode']); - - // Cache the config in the object - $this->config = $config; - - Kohana::log('debug', 'Encrypt Library initialized'); - } - - /** - * Encrypts a string and returns an encrypted string that can be decoded. - * - * @param string data to be encrypted - * @return string encrypted data - */ - public function encode($data) - { - // Set the rand type if it has not already been set - if (Encrypt::$rand === NULL) - { - if (KOHANA_IS_WIN) - { - // Windows only supports the system random number generator - Encrypt::$rand = MCRYPT_RAND; - } - else - { - if (defined('MCRYPT_DEV_URANDOM')) - { - // Use /dev/urandom - Encrypt::$rand = MCRYPT_DEV_URANDOM; - } - elseif (defined('MCRYPT_DEV_RANDOM')) - { - // Use /dev/random - Encrypt::$rand = MCRYPT_DEV_RANDOM; - } - else - { - // Use the system random number generator - Encrypt::$rand = MCRYPT_RAND; - } - } - } - - if (Encrypt::$rand === MCRYPT_RAND) - { - // The system random number generator must always be seeded each - // time it is used, or it will not produce true random results - mt_srand(); - } - - // Create a random initialization vector of the proper size for the current cipher - $iv = mcrypt_create_iv($this->config['iv_size'], Encrypt::$rand); - - // Encrypt the data using the configured options and generated iv - $data = mcrypt_encrypt($this->config['cipher'], $this->config['key'], $data, $this->config['mode'], $iv); - - // Use base64 encoding to convert to a string - return base64_encode($iv.$data); - } - - /** - * Decrypts an encoded string back to its original value. - * - * @param string encoded string to be decrypted - * @return string decrypted data - */ - public function decode($data) - { - // Convert the data back to binary - $data = base64_decode($data); - - // Extract the initialization vector from the data - $iv = substr($data, 0, $this->config['iv_size']); - - // Remove the iv from the data - $data = substr($data, $this->config['iv_size']); - - // Return the decrypted data, trimming the \0 padding bytes from the end of the data - return rtrim(mcrypt_decrypt($this->config['cipher'], $this->config['key'], $data, $this->config['mode'], $iv), "\0"); - } - -} // End Encrypt |