late) ); } unset($data); $template = strtr($template, $replace); if ($return === FALSE) { $this->CI->output->append_output($template); } return $template; } // -------------------------------------------------------------------- /** * Set the left/right variable delimiters * * @param string * @param string * @return void */ public function set_delimiters($l = '{', $r = '}') { $this->l_delim = $l; $this->r_delim = $r; } // -------------------------------------------------------------------- /** * Parse a single key/value * * @param string * @param string * @param string * @return string */ protected function _parse_single($key, $val, $string) { return array($this->l_delim.$key.$this->r_delim => (string) $val); } // -------------------------------------------------------------------- /** * Parse a tag pair * * Parses tag pairs: {some_tag} string... {/some_tag} * * @param string * @param array * @param string * @return string */ protected function _parse_pair($variable, $data, $string) { $replace = array(); preg_match_all( '#'.preg_quote($this->l_delim.$variable.$this->r_delim).'(.+?)'.preg_quote($this->l_delim.'/'.$variable.$this->r_delim).'#s', $string, $matches, PREG_SET_ORDER ); foreach ($matches as $match) { $str = ''; foreach ($data as $row) { $temp = array(); foreach ($row as $key => $val) { if (is_array($val)) { $pair = $this->_parse_pair($key, $val, $match[1]); if ( ! empty($pair)) { $temp = array_merge($temp, $pair); } continue; } $temp[$this->l_delim.$key.$this->r_delim] = $val; } $str .= strtr($match[1], $temp); } $replace[$match[0]] = $str; } return $replace; } } _mcrypt_exists = function_exists('mcrypt_encrypt')) === FALSE) { show_error('The Encrypt library requires the Mcrypt extension.'); } log_message('info', 'Encrypt Class Initialized'); } // -------------------------------------------------------------------- /** * Fetch the encryption key * * Returns it as MD5 in order to have an exact-length 128 bit key. * Mcrypt is sensitive to keys that are not the correct length * * @param string * @return string */ public function get_key($key = '') { if ($key === '') { if ($this->encryption_key !== '') { return $this->encryption_key; } $key = config_item('encryption_key'); if ( ! self::strlen($key)) { show_error('In order to use the encryption class requires that you set an encryption key in your config file.'); } } return md5($key); } // -------------------------------------------------------------------- /** * Set the encryption key * * @param string * @return CI_Encrypt */ public function set_key($key = '') { $this->encryption_key = $key; return $this; } // -------------------------------------------------------------------- /** * Encode * * Encodes the message string using bitwise XOR encoding. * The key is combined with a random hash, and then it * too gets converted using XOR. The whole thing is then run * through mcrypt using the randomized key. The end result * is a double-encrypted message string that is randomized * with each call to this function, even if the supplied * message and key are the same. * * @param string the string to encode * @param string the key * @return string */ public function encode($string, $key = '') { return base64_encode($this->mcrypt_encode($string, $this->get_key($key))); } // -------------------------------------------------------------------- /** * Decode * * Reverses the above process * * @param string * @param string * @return string */ public function decode($string, $key = '') { if (preg_match('/[^a-zA-Z0-9\/\+=]/', $string) OR base64_encode(base64_decode($string)) !== $string) { return FALSE; } return $this->mcrypt_decode(base64_decode($string), $this->get_key($key)); } // -------------------------------------------------------------------- /** * Encode from Legacy * * Takes an encoded string from the original Encryption class algorithms and * returns a newly encoded string using the improved method added in 2.0.0 * This allows for backwards compatibility and a method to transition to the * new encryption algorithms. * * For more details, see https://codeigniter.com/userguide3/installation/upgrade_200.html#encryption * * @param string * @param int (mcrypt mode constant) * @param string * @return string */ public function encode_from_legacy($string, $legacy_mode = MCRYPT_MODE_ECB, $key = '') { if (preg_match('/[^a-zA-Z0-9\/\+=]/', $string)) { return FALSE; } // decode it first // set mode temporarily to what it was when string was encoded with the legacy // algorithm - typically MCRYPT_MODE_ECB $current_mode = $this->_get_mode(); $this->set_mode($legacy_mode); $key = $this->get_key($key); $dec = base64_decode($string); if (($dec = $this->mcrypt_decode($dec, $key)) === FALSE) { $this->set_mode($current_mode); return FALSE; } $dec = $this->_xor_decode($dec, $key); // set the mcrypt mode back to what it should be, typically MCRYPT_MODE_CBC $this->set_mode($current_mode); // and re-encode return base64_encode($this->mcrypt_encode($dec, $key)); } // -------------------------------------------------------------------- /** * XOR Decode * * Takes an encoded string and key as input and generates the * plain-text original message * * @param string * @param string * @return string */ protected function _xor_decode($string, $key) { $string = $this->_xor_merge($string, $key); $dec = ''; for ($i = 0, $l = self::strlen($string); $i < $l; $i++) { $dec .= ($string[$i++] ^ $string[$i]); } return $dec; } // -------------------------------------------------------------------- /** * XOR key + string Combiner * * Takes a string and key as input and computes the difference using XOR * * @param string * @param string * @return string */ protected function _xor_merge($string, $key) { $hash = $this->hash($key); $str = ''; for ($i = 0, $ls = self::strlen($string), $lh = self::strlen($hash); $i < $ls; $i++) { $str .= $string[$i] ^ $hash[($i % $lh)]; } return $str; } // -------------------------------------------------------------------- /** * Encrypt using Mcrypt * * @param string * @param string * @return string */ public function mcrypt_encode($data, $key) { $init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode()); $init_vect = mcrypt_create_iv($init_size, MCRYPT_DEV_URANDOM); return $this->_add_cipher_noise($init_vect.mcrypt_encrypt($this->_get_cipher(), $key, $data, $this->_get_mode(), $init_vect), $key); } // -------------------------------------------------------------------- /** * Decrypt using Mcrypt * * @param string * @param string * @return string */ public function mcrypt_decode($data, $key) { $data = $this->_remove_cipher_noise($data, $key); $init_size = mcrypt_get_iv_size($this->_get_cipher(), $this->_get_mode()); if ($init_size > self::strlen($data)) { return FALSE; } $init_vect = self::substr($data, 0, $init_size); $data = self::substr($data, $init_size); return rtrim(mcrypt_decrypt($this->_get_cipher(), $key, $data, $this->_get_mode(), $init_vect), "\0"); } // -------------------------------------------------------------------- /** * Adds permuted noise to the IV + encrypted data to protect * against Man-in-the-middle attacks on CBC mode ciphers * http://www.ciphersbyritter.com/GLOSSARY.HTM#IV * * @param string * @param string * @return string */ protected function _add_cipher_noise($data, $key) { $key = $this->hash($key); $str = ''; for ($i = 0, $j = 0, $ld = self::strlen($data), $lk = self::strlen($key); $i < $ld; ++$i, ++$j) { if ($j >= $lk) { $j = 0; } $str .= chr((ord($data[$i]) + ord($key[$j])) % 256); } return $str; } // -------------------------------------------------------------------- /** * Removes permuted noise from the IV + encrypted data, reversing * _add_cipher_noise() * * Function description * * @param string $data * @param string $key * @return string */ protected function _remove_cipher_noise($data, $key) { $key = $this->hash($key); $str = ''; for ($i = 0, $j = 0, $ld = self::strlen($data), $lk = self::strlen($key); $i < $ld; ++$i, ++$j) { if ($j >= $lk) { $j = 0; } $temp = ord($data[$i]) - ord($key[$j]); if ($temp < 0) { $temp += 256; } $str .= chr($temp); } return $str; } // -------------------------------------------------------------------- /** * Set the Mcrypt Cipher * * @param int * @return CI_Encrypt */ public function set_cipher($cipher) { $this->_mcrypt_cipher = $cipher; return $this; } // -------------------------------------------------------------------- /** * Set the Mcrypt Mode * * @param int * @return CI_Encrypt */ public function set_mode($mode) { $this->_mcrypt_mode = $mode; return $this; } // -------------------------------------------------------------------- /** * Get Mcrypt cipher Value * * @return int */ protected function _get_cipher() { if ($this->_mcrypt_cipher === NULL) { return $this->_mcrypt_cipher = MCRYPT_RIJNDAEL_256; } return $this->_mcrypt_cipher; } // -------------------------------------------------------------------- /** * Get Mcrypt Mode Value * * @return int */ protected function _get_mode() { if ($this->_mcrypt_mode === NULL) { return $this->_mcrypt_mode = MCRYPT_MODE_CBC; } return $this->_mcrypt_mode; } // -------------------------------------------------------------------- /** * Set the Hash type * * @param string * @return void */ public function set_hash($type = 'sha1') { $this->_hash_type = in_array($type, hash_algos()) ? $type : 'sha1'; } // -------------------------------------------------------------------- /** * Hash encode a string * * @param string * @return string */ public function hash($str) { return hash($this->_hash_type, $str); } // -------------------------------------------------------------------- /** * Byte-safe strlen() * * @param string $str * @return int */ protected static function strlen($str) { return defined('MB_OVERLOAD_STRING') ? mb_strlen($str, '8bit') : strlen($str); } // -------------------------------------------------------------------- /** * Byte-safe substr() * * @param string $str * @param int $start * @param int $length * @return string */ protected static function substr($str, $start, $length = NULL) { if (defined('MB_OVERLOAD_STRING')) { // mb_substr($str, $start, null, '8bit') returns an empty // string on PHP 5.3 isset($length) OR $length = ($start >= 0 ? self::strlen($str) - $start : -$start); return mb_substr($str, $start, $length, '8bit'); } return isset($length) ? substr($str, $start, $length) : substr($str, $start); } } load_driver($child); } /** * Load driver * * Separate load_driver call to support explicit driver load by library or user * * @param string Driver name (w/o parent prefix) * @return object Child class */ public function load_driver($child) { // Get CodeIgniter instance and subclass prefix $prefix = config_item('subclass_prefix'); if ( ! isset($this->lib_name)) { // Get library name without any prefix $this->lib_name = str_replace(array('CI_', $prefix), '', get_class($this)); } // The child will be prefixed with the parent lib $child_name = $this->lib_name.'_'.$child; // See if requested child is a valid driver if ( ! in_array($child, $this->valid_drivers)) { // The requested driver isn't valid! $msg = 'Invalid driver requested: '.$child_name; log_message('error', $msg); show_error($msg); } // Get package paths and filename case variations to search $CI = get_instance(); $paths = $CI->load->get_package_paths(TRUE); // Is there an extension? $class_name = $prefix.$child_name; $found = class_exists($class_name, FALSE); if ( ! $found) { // Check for subclass file foreach ($paths as $path) { // Does the file exist? $file = $path.'libraries/'.$this->lib_name.'/drivers/'.$prefix.$child_name.'.php'; if (file_exists($file)) { // Yes - require base class from BASEPATH $basepath = BASEPATH.'libraries/'.$this->lib_name.'/drivers/'.$child_name.'.php'; if ( ! file_exists($basepath)) { $msg = 'Unable to load the requested class: CI_'.$child_name; log_message('error', $msg); show_error($msg); } // Include both sources and mark found include_once($basepath); include_once($file); $found = TRUE; break; } } } // Do we need to search for the class? if ( ! $found) { // Use standard class name $class_name = 'CI_'.$child_name; if ( ! class_exists($class_name, FALSE)) { // Check package paths foreach ($paths as $path) { // Does the file exist? $file = $path.'libraries/'.$this->lib_name.'/drivers/'.$child_name.'.php'; if (file_exists($file)) { // Include source include_once($file); break; } } } } // Did we finally find the class? if ( ! class_exists($class_name, FALSE)) { if (class_exists($child_name, FALSE)) { $class_name = $child_name; } else { $msg = 'Unable to load the requested driver: '.$class_name; log_message('error', $msg); show_error($msg); } } // Instantiate, decorate and add child $obj = new $class_name(); $obj->decorate($this); $this->$child = $obj; return $this->$child; } } // -------------------------------------------------------------------------- /** * CodeIgniter Driver Class * * This class enables you to create drivers for a Library based on the Driver Library. * It handles the drivers' access to the parent library * * @package CodeIgniter * @subpackage Libraries * @category Libraries * @author EllisLab Dev Team * @link */ class CI_Driver { /** * Instance of the parent class * * @var object */ protected $_parent; /** * List of methods in the parent class * * @var array */ protected $_methods = array(); /** * List of properties in the parent class * * @var array */ protected $_properties = array(); /** * Array of methods and properties for the parent class(es) * * @static * @var array */ protected static $_reflections = array(); /** * Decorate * * Decorates the child with the parent driver lib's methods and properties * * @param object * @return void */ public function decorate($parent) { $this->_parent = $parent; // Lock down attributes to what is defined in the class // and speed up references in magic methods $class_name = get_class($parent); if ( ! isset(self::$_reflections[$class_name])) { $r = new ReflectionObject($parent); foreach ($r->getMethods() as $method) { if ($method->isPublic()) { $this->_methods[] = $method->getName(); } } foreach ($r->getProperties() as $prop) { if ($prop->isPublic()) { $this->_properties[] = $prop->getName(); } } self::$_reflections[$class_name] = array($this->_methods, $this->_properties); } else { list($this->_methods, $this->_properties) = self::$_reflections[$class_name]; } } // -------------------------------------------------------------------- /** * __call magic method * * Handles access to the parent driver library's methods * * @param string * @param array * @return mixed */ public function __call($method, $args = array()) { if (in_array($method, $this->_methods)) { return call_user_func_array(array($this->_parent, $method), $args); } throw new BadMethodCallException('No such method: '.$method.'()'); } // -------------------------------------------------------------------- /** * __get magic method * * Handles reading of the parent driver library's properties * * @param string * @return mixed */ public function __get($var) { if (in_array($var, $this->_properties)) { return $this->_parent->$var; } } // -------------------------------------------------------------------- /** * __set magic method * * Handles writing to the parent driver library's properties * * @param string * @param array * @return mixed */ public function __set($var, $val) { if (in_array($var, $this->_properties)) { $this->_parent->$var = $val; } } } Created by FontForge 20201107 at Tue Mar 16 10:15:04 2021 By Robert Madole Copyright (c) Font Awesome