| 1 |
<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed'); |
| 2 |
/** |
| 3 |
* CodeIgniter |
| 4 |
* |
| 5 |
* An open source application development framework for PHP 5.1.6 or newer |
| 6 |
* |
| 7 |
* @package CodeIgniter |
| 8 |
* @author ExpressionEngine Dev Team |
| 9 |
* @copyright Copyright (c) 2008 - 2011, EllisLab, Inc. |
| 10 |
* @license http://codeigniter.com/user_guide/license.html |
| 11 |
* @link http://codeigniter.com |
| 12 |
* @since Version 1.0 |
| 13 |
* @filesource |
| 14 |
*/ |
| 15 |
|
| 16 |
// ------------------------------------------------------------------------ |
| 17 |
|
| 18 |
/** |
| 19 |
* Input Class |
| 20 |
* |
| 21 |
* Pre-processes global input data for security |
| 22 |
* |
| 23 |
* @package CodeIgniter |
| 24 |
* @subpackage Libraries |
| 25 |
* @category Input |
| 26 |
* @author ExpressionEngine Dev Team |
| 27 |
* @link http://codeigniter.com/user_guide/libraries/input.html |
| 28 |
*/ |
| 29 |
class CI_Input { |
| 30 |
|
| 31 |
/** |
| 32 |
* IP address of the current user |
| 33 |
* |
| 34 |
* @var string |
| 35 |
*/ |
| 36 |
var $ip_address = FALSE; |
| 37 |
/** |
| 38 |
* user agent (web browser) being used by the current user |
| 39 |
* |
| 40 |
* @var string |
| 41 |
*/ |
| 42 |
var $user_agent = FALSE; |
| 43 |
/** |
| 44 |
* If FALSE, then $_GET will be set to an empty array |
| 45 |
* |
| 46 |
* @var bool |
| 47 |
*/ |
| 48 |
var $_allow_get_array = TRUE; |
| 49 |
/** |
| 50 |
* If TRUE, then newlines are standardized |
| 51 |
* |
| 52 |
* @var bool |
| 53 |
*/ |
| 54 |
var $_standardize_newlines = TRUE; |
| 55 |
/** |
| 56 |
* Determines whether the XSS filter is always active when GET, POST or COOKIE data is encountered |
| 57 |
* Set automatically based on config setting |
| 58 |
* |
| 59 |
* @var bool |
| 60 |
*/ |
| 61 |
var $_enable_xss = FALSE; |
| 62 |
/** |
| 63 |
* Enables a CSRF cookie token to be set. |
| 64 |
* Set automatically based on config setting |
| 65 |
* |
| 66 |
* @var bool |
| 67 |
*/ |
| 68 |
var $_enable_csrf = FALSE; |
| 69 |
/** |
| 70 |
* List of all HTTP request headers |
| 71 |
* |
| 72 |
* @var array |
| 73 |
*/ |
| 74 |
protected $headers = array(); |
| 75 |
|
| 76 |
/** |
| 77 |
* Constructor |
| 78 |
* |
| 79 |
* Sets whether to globally enable the XSS processing |
| 80 |
* and whether to allow the $_GET array |
| 81 |
* |
| 82 |
* @return void |
| 83 |
*/ |
| 84 |
public function __construct() |
| 85 |
{ |
| 86 |
log_message('debug', "Input Class Initialized"); |
| 87 |
|
| 88 |
$this->_allow_get_array = (config_item('allow_get_array') === TRUE); |
| 89 |
$this->_enable_xss = (config_item('global_xss_filtering') === TRUE); |
| 90 |
$this->_enable_csrf = (config_item('csrf_protection') === TRUE); |
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|
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global $SEC; |
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$this->security =& $SEC; |
| 94 |
|
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// Do we need the UTF-8 class? |
| 96 |
if (UTF8_ENABLED === TRUE) |
| 97 |
{ |
| 98 |
global $UNI; |
| 99 |
$this->uni =& $UNI; |
| 100 |
} |
| 101 |
|
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// Sanitize global arrays |
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$this->_sanitize_globals(); |
| 104 |
} |
| 105 |
|
| 106 |
// -------------------------------------------------------------------- |
| 107 |
|
| 108 |
/** |
| 109 |
* Fetch from array |
| 110 |
* |
| 111 |
* This is a helper function to retrieve values from global arrays |
| 112 |
* |
| 113 |
* @access private |
| 114 |
* @param array |
| 115 |
* @param string |
| 116 |
* @param bool |
| 117 |
* @return string |
| 118 |
*/ |
| 119 |
function _fetch_from_array(&$array, $index = '', $xss_clean = FALSE) |
| 120 |
{ |
| 121 |
if ( ! isset($array[$index])) |
| 122 |
{ |
| 123 |
return FALSE; |
| 124 |
} |
| 125 |
|
| 126 |
if ($xss_clean === TRUE) |
| 127 |
{ |
| 128 |
return $this->security->xss_clean($array[$index]); |
| 129 |
} |
| 130 |
|
| 131 |
return $array[$index]; |
| 132 |
} |
| 133 |
|
| 134 |
// -------------------------------------------------------------------- |
| 135 |
|
| 136 |
/** |
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* Fetch an item from the GET array |
| 138 |
* |
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* @access public |
| 140 |
* @param string |
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* @param bool |
| 142 |
* @return string |
| 143 |
*/ |
| 144 |
function get($index = NULL, $xss_clean = FALSE) |
| 145 |
{ |
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// Check if a field has been provided |
| 147 |
if ($index === NULL AND ! empty($_GET)) |
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{ |
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$get = array(); |
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|
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// loop through the full _GET array |
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foreach (array_keys($_GET) as $key) |
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{ |
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$get[$key] = $this->_fetch_from_array($_GET, $key, $xss_clean); |
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} |
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return $get; |
| 157 |
} |
| 158 |
|
| 159 |
return $this->_fetch_from_array($_GET, $index, $xss_clean); |
| 160 |
} |
| 161 |
|
| 162 |
// -------------------------------------------------------------------- |
| 163 |
|
| 164 |
/** |
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* Fetch an item from the POST array |
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* |
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* @access public |
| 168 |
* @param string |
| 169 |
* @param bool |
| 170 |
* @return string |
| 171 |
*/ |
| 172 |
function post($index = NULL, $xss_clean = FALSE) |
| 173 |
{ |
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// Check if a field has been provided |
| 175 |
if ($index === NULL AND ! empty($_POST)) |
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{ |
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$post = array(); |
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|
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// Loop through the full _POST array and return it |
| 180 |
foreach (array_keys($_POST) as $key) |
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{ |
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$post[$key] = $this->_fetch_from_array($_POST, $key, $xss_clean); |
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} |
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return $post; |
| 185 |
} |
| 186 |
|
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return $this->_fetch_from_array($_POST, $index, $xss_clean); |
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} |
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|
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|
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// -------------------------------------------------------------------- |
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|
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/** |
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* Fetch an item from either the GET array or the POST |
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* |
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* @access public |
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* @param string The index key |
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* @param bool XSS cleaning |
| 199 |
* @return string |
| 200 |
*/ |
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function get_post($index = '', $xss_clean = FALSE) |
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{ |
| 203 |
if ( ! isset($_POST[$index]) ) |
| 204 |
{ |
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return $this->get($index, $xss_clean); |
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} |
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else |
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{ |
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return $this->post($index, $xss_clean); |
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} |
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} |
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|
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// -------------------------------------------------------------------- |
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|
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/** |
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* Fetch an item from the COOKIE array |
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* |
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* @access public |
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* @param string |
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* @param bool |
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* @return string |
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*/ |
| 223 |
function cookie($index = '', $xss_clean = FALSE) |
| 224 |
{ |
| 225 |
return $this->_fetch_from_array($_COOKIE, $index, $xss_clean); |
| 226 |
} |
| 227 |
|
| 228 |
// ------------------------------------------------------------------------ |
| 229 |
|
| 230 |
/** |
| 231 |
* Set cookie |
| 232 |
* |
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* Accepts six parameter, or you can submit an associative |
| 234 |
* array in the first parameter containing all the values. |
| 235 |
* |
| 236 |
* @access public |
| 237 |
* @param mixed |
| 238 |
* @param string the value of the cookie |
| 239 |
* @param string the number of seconds until expiration |
| 240 |
* @param string the cookie domain. Usually: .yourdomain.com |
| 241 |
* @param string the cookie path |
| 242 |
* @param string the cookie prefix |
| 243 |
* @param bool true makes the cookie secure |
| 244 |
* @return void |
| 245 |
*/ |
| 246 |
function set_cookie($name = '', $value = '', $expire = '', $domain = '', $path = '/', $prefix = '', $secure = FALSE) |
| 247 |
{ |
| 248 |
if (is_array($name)) |
| 249 |
{ |
| 250 |
// always leave 'name' in last place, as the loop will break otherwise, due to $$item |
| 251 |
foreach (array('value', 'expire', 'domain', 'path', 'prefix', 'secure', 'name') as $item) |
| 252 |
{ |
| 253 |
if (isset($name[$item])) |
| 254 |
{ |
| 255 |
$$item = $name[$item]; |
| 256 |
} |
| 257 |
} |
| 258 |
} |
| 259 |
|
| 260 |
if ($prefix == '' AND config_item('cookie_prefix') != '') |
| 261 |
{ |
| 262 |
$prefix = config_item('cookie_prefix'); |
| 263 |
} |
| 264 |
if ($domain == '' AND config_item('cookie_domain') != '') |
| 265 |
{ |
| 266 |
$domain = config_item('cookie_domain'); |
| 267 |
} |
| 268 |
if ($path == '/' AND config_item('cookie_path') != '/') |
| 269 |
{ |
| 270 |
$path = config_item('cookie_path'); |
| 271 |
} |
| 272 |
if ($secure == FALSE AND config_item('cookie_secure') != FALSE) |
| 273 |
{ |
| 274 |
$secure = config_item('cookie_secure'); |
| 275 |
} |
| 276 |
|
| 277 |
if ( ! is_numeric($expire)) |
| 278 |
{ |
| 279 |
$expire = time() - 86500; |
| 280 |
} |
| 281 |
else |
| 282 |
{ |
| 283 |
$expire = ($expire > 0) ? time() + $expire : 0; |
| 284 |
} |
| 285 |
|
| 286 |
setcookie($prefix.$name, $value, $expire, $path, $domain, $secure); |
| 287 |
} |
| 288 |
|
| 289 |
// -------------------------------------------------------------------- |
| 290 |
|
| 291 |
/** |
| 292 |
* Fetch an item from the SERVER array |
| 293 |
* |
| 294 |
* @access public |
| 295 |
* @param string |
| 296 |
* @param bool |
| 297 |
* @return string |
| 298 |
*/ |
| 299 |
function server($index = '', $xss_clean = FALSE) |
| 300 |
{ |
| 301 |
return $this->_fetch_from_array($_SERVER, $index, $xss_clean); |
| 302 |
} |
| 303 |
|
| 304 |
// -------------------------------------------------------------------- |
| 305 |
|
| 306 |
/** |
| 307 |
* Fetch the IP Address |
| 308 |
* |
| 309 |
* @return string |
| 310 |
*/ |
| 311 |
public function ip_address() |
| 312 |
{ |
| 313 |
if ($this->ip_address !== FALSE) |
| 314 |
{ |
| 315 |
return $this->ip_address; |
| 316 |
} |
| 317 |
|
| 318 |
$proxy_ips = config_item('proxy_ips'); |
| 319 |
if ( ! empty($proxy_ips)) |
| 320 |
{ |
| 321 |
$proxy_ips = explode(',', str_replace(' ', '', $proxy_ips)); |
| 322 |
foreach (array('HTTP_X_FORWARDED_FOR', 'HTTP_CLIENT_IP', 'HTTP_X_CLIENT_IP', 'HTTP_X_CLUSTER_CLIENT_IP') as $header) |
| 323 |
{ |
| 324 |
if (($spoof = $this->server($header)) !== FALSE) |
| 325 |
{ |
| 326 |
// Some proxies typically list the whole chain of IP |
| 327 |
// addresses through which the client has reached us. |
| 328 |
// e.g. client_ip, proxy_ip1, proxy_ip2, etc. |
| 329 |
if (strpos($spoof, ',') !== FALSE) |
| 330 |
{ |
| 331 |
$spoof = explode(',', $spoof, 2); |
| 332 |
$spoof = $spoof[0]; |
| 333 |
} |
| 334 |
|
| 335 |
if ( ! $this->valid_ip($spoof)) |
| 336 |
{ |
| 337 |
$spoof = FALSE; |
| 338 |
} |
| 339 |
else |
| 340 |
{ |
| 341 |
break; |
| 342 |
} |
| 343 |
} |
| 344 |
} |
| 345 |
|
| 346 |
$this->ip_address = ($spoof !== FALSE && in_array($_SERVER['REMOTE_ADDR'], $proxy_ips, TRUE)) |
| 347 |
? $spoof : $_SERVER['REMOTE_ADDR']; |
| 348 |
} |
| 349 |
else |
| 350 |
{ |
| 351 |
$this->ip_address = $_SERVER['REMOTE_ADDR']; |
| 352 |
} |
| 353 |
|
| 354 |
if ( ! $this->valid_ip($this->ip_address)) |
| 355 |
{ |
| 356 |
$this->ip_address = '0.0.0.0'; |
| 357 |
} |
| 358 |
|
| 359 |
return $this->ip_address; |
| 360 |
} |
| 361 |
|
| 362 |
// -------------------------------------------------------------------- |
| 363 |
|
| 364 |
/** |
| 365 |
* Validate IP Address |
| 366 |
* |
| 367 |
* @access public |
| 368 |
* @param string |
| 369 |
* @param string ipv4 or ipv6 |
| 370 |
* @return bool |
| 371 |
*/ |
| 372 |
public function valid_ip($ip, $which = '') |
| 373 |
{ |
| 374 |
$which = strtolower($which); |
| 375 |
|
| 376 |
// First check if filter_var is available |
| 377 |
if (is_callable('filter_var')) |
| 378 |
{ |
| 379 |
switch ($which) { |
| 380 |
case 'ipv4': |
| 381 |
$flag = FILTER_FLAG_IPV4; |
| 382 |
break; |
| 383 |
case 'ipv6': |
| 384 |
$flag = FILTER_FLAG_IPV6; |
| 385 |
break; |
| 386 |
default: |
| 387 |
$flag = ''; |
| 388 |
break; |
| 389 |
} |
| 390 |
|
| 391 |
return (bool) filter_var($ip, FILTER_VALIDATE_IP, $flag); |
| 392 |
} |
| 393 |
|
| 394 |
if ($which !== 'ipv6' && $which !== 'ipv4') |
| 395 |
{ |
| 396 |
if (strpos($ip, ':') !== FALSE) |
| 397 |
{ |
| 398 |
$which = 'ipv6'; |
| 399 |
} |
| 400 |
elseif (strpos($ip, '.') !== FALSE) |
| 401 |
{ |
| 402 |
$which = 'ipv4'; |
| 403 |
} |
| 404 |
else |
| 405 |
{ |
| 406 |
return FALSE; |
| 407 |
} |
| 408 |
} |
| 409 |
|
| 410 |
$func = '_valid_'.$which; |
| 411 |
return $this->$func($ip); |
| 412 |
} |
| 413 |
|
| 414 |
// -------------------------------------------------------------------- |
| 415 |
|
| 416 |
/** |
| 417 |
* Validate IPv4 Address |
| 418 |
* |
| 419 |
* Updated version suggested by Geert De Deckere |
| 420 |
* |
| 421 |
* @access protected |
| 422 |
* @param string |
| 423 |
* @return bool |
| 424 |
*/ |
| 425 |
protected function _valid_ipv4($ip) |
| 426 |
{ |
| 427 |
$ip_segments = explode('.', $ip); |
| 428 |
|
| 429 |
// Always 4 segments needed |
| 430 |
if (count($ip_segments) !== 4) |
| 431 |
{ |
| 432 |
return FALSE; |
| 433 |
} |
| 434 |
// IP can not start with 0 |
| 435 |
if ($ip_segments[0][0] == '0') |
| 436 |
{ |
| 437 |
return FALSE; |
| 438 |
} |
| 439 |
|
| 440 |
// Check each segment |
| 441 |
foreach ($ip_segments as $segment) |
| 442 |
{ |
| 443 |
// IP segments must be digits and can not be |
| 444 |
// longer than 3 digits or greater then 255 |
| 445 |
if ($segment == '' OR preg_match("/[^0-9]/", $segment) OR $segment > 255 OR strlen($segment) > 3) |
| 446 |
{ |
| 447 |
return FALSE; |
| 448 |
} |
| 449 |
} |
| 450 |
|
| 451 |
return TRUE; |
| 452 |
} |
| 453 |
|
| 454 |
// -------------------------------------------------------------------- |
| 455 |
|
| 456 |
/** |
| 457 |
* Validate IPv6 Address |
| 458 |
* |
| 459 |
* @access protected |
| 460 |
* @param string |
| 461 |
* @return bool |
| 462 |
*/ |
| 463 |
protected function _valid_ipv6($str) |
| 464 |
{ |
| 465 |
// 8 groups, separated by : |
| 466 |
// 0-ffff per group |
| 467 |
// one set of consecutive 0 groups can be collapsed to :: |
| 468 |
|
| 469 |
$groups = 8; |
| 470 |
$collapsed = FALSE; |
| 471 |
|
| 472 |
$chunks = array_filter( |
| 473 |
preg_split('/(:{1,2})/', $str, NULL, PREG_SPLIT_DELIM_CAPTURE) |
| 474 |
); |
| 475 |
|
| 476 |
// Rule out easy nonsense |
| 477 |
if (current($chunks) == ':' OR end($chunks) == ':') |
| 478 |
{ |
| 479 |
return FALSE; |
| 480 |
} |
| 481 |
|
| 482 |
// PHP supports IPv4-mapped IPv6 addresses, so we'll expect those as well |
| 483 |
if (strpos(end($chunks), '.') !== FALSE) |
| 484 |
{ |
| 485 |
$ipv4 = array_pop($chunks); |
| 486 |
|
| 487 |
if ( ! $this->_valid_ipv4($ipv4)) |
| 488 |
{ |
| 489 |
return FALSE; |
| 490 |
} |
| 491 |
|
| 492 |
$groups--; |
| 493 |
} |
| 494 |
|
| 495 |
while ($seg = array_pop($chunks)) |
| 496 |
{ |
| 497 |
if ($seg[0] == ':') |
| 498 |
{ |
| 499 |
if (--$groups == 0) |
| 500 |
{ |
| 501 |
return FALSE; // too many groups |
| 502 |
} |
| 503 |
|
| 504 |
if (strlen($seg) > 2) |
| 505 |
{ |
| 506 |
return FALSE; // long separator |
| 507 |
} |
| 508 |
|
| 509 |
if ($seg == '::') |
| 510 |
{ |
| 511 |
if ($collapsed) |
| 512 |
{ |
| 513 |
return FALSE; // multiple collapsed |
| 514 |
} |
| 515 |
|
| 516 |
$collapsed = TRUE; |
| 517 |
} |
| 518 |
} |
| 519 |
elseif (preg_match("/[^0-9a-f]/i", $seg) OR strlen($seg) > 4) |
| 520 |
{ |
| 521 |
return FALSE; // invalid segment |
| 522 |
} |
| 523 |
} |
| 524 |
|
| 525 |
return $collapsed OR $groups == 1; |
| 526 |
} |
| 527 |
|
| 528 |
// -------------------------------------------------------------------- |
| 529 |
|
| 530 |
/** |
| 531 |
* User Agent |
| 532 |
* |
| 533 |
* @access public |
| 534 |
* @return string |
| 535 |
*/ |
| 536 |
function user_agent() |
| 537 |
{ |
| 538 |
if ($this->user_agent !== FALSE) |
| 539 |
{ |
| 540 |
return $this->user_agent; |
| 541 |
} |
| 542 |
|
| 543 |
$this->user_agent = ( ! isset($_SERVER['HTTP_USER_AGENT'])) ? FALSE : $_SERVER['HTTP_USER_AGENT']; |
| 544 |
|
| 545 |
return $this->user_agent; |
| 546 |
} |
| 547 |
|
| 548 |
// -------------------------------------------------------------------- |
| 549 |
|
| 550 |
/** |
| 551 |
* Sanitize Globals |
| 552 |
* |
| 553 |
* This function does the following: |
| 554 |
* |
| 555 |
* Unsets $_GET data (if query strings are not enabled) |
| 556 |
* |
| 557 |
* Unsets all globals if register_globals is enabled |
| 558 |
* |
| 559 |
* Standardizes newline characters to \n |
| 560 |
* |
| 561 |
* @access private |
| 562 |
* @return void |
| 563 |
*/ |
| 564 |
function _sanitize_globals() |
| 565 |
{ |
| 566 |
// It would be "wrong" to unset any of these GLOBALS. |
| 567 |
$protected = array('_SERVER', '_GET', '_POST', '_FILES', '_REQUEST', |
| 568 |
'_SESSION', '_ENV', 'GLOBALS', 'HTTP_RAW_POST_DATA', |
| 569 |
'system_folder', 'application_folder', 'BM', 'EXT', |
| 570 |
'CFG', 'URI', 'RTR', 'OUT', 'IN'); |
| 571 |
|
| 572 |
// Unset globals for securiy. |
| 573 |
// This is effectively the same as register_globals = off |
| 574 |
foreach (array($_GET, $_POST, $_COOKIE) as $global) |
| 575 |
{ |
| 576 |
if ( ! is_array($global)) |
| 577 |
{ |
| 578 |
if ( ! in_array($global, $protected)) |
| 579 |
{ |
| 580 |
global $$global; |
| 581 |
$$global = NULL; |
| 582 |
} |
| 583 |
} |
| 584 |
else |
| 585 |
{ |
| 586 |
foreach ($global as $key => $val) |
| 587 |
{ |
| 588 |
if ( ! in_array($key, $protected)) |
| 589 |
{ |
| 590 |
global $$key; |
| 591 |
$$key = NULL; |
| 592 |
} |
| 593 |
} |
| 594 |
} |
| 595 |
} |
| 596 |
|
| 597 |
// Is $_GET data allowed? If not we'll set the $_GET to an empty array |
| 598 |
if ($this->_allow_get_array == FALSE) |
| 599 |
{ |
| 600 |
$_GET = array(); |
| 601 |
} |
| 602 |
else |
| 603 |
{ |
| 604 |
if (is_array($_GET) AND count($_GET) > 0) |
| 605 |
{ |
| 606 |
foreach ($_GET as $key => $val) |
| 607 |
{ |
| 608 |
$_GET[$this->_clean_input_keys($key)] = $this->_clean_input_data($val); |
| 609 |
} |
| 610 |
} |
| 611 |
} |
| 612 |
|
| 613 |
// Clean $_POST Data |
| 614 |
if (is_array($_POST) AND count($_POST) > 0) |
| 615 |
{ |
| 616 |
foreach ($_POST as $key => $val) |
| 617 |
{ |
| 618 |
$_POST[$this->_clean_input_keys($key)] = $this->_clean_input_data($val); |
| 619 |
} |
| 620 |
} |
| 621 |
|
| 622 |
// Clean $_COOKIE Data |
| 623 |
if (is_array($_COOKIE) AND count($_COOKIE) > 0) |
| 624 |
{ |
| 625 |
// Also get rid of specially treated cookies that might be set by a server |
| 626 |
// or silly application, that are of no use to a CI application anyway |
| 627 |
// but that when present will trip our 'Disallowed Key Characters' alarm |
| 628 |
// http://www.ietf.org/rfc/rfc2109.txt |
| 629 |
// note that the key names below are single quoted strings, and are not PHP variables |
| 630 |
unset($_COOKIE['$Version']); |
| 631 |
unset($_COOKIE['$Path']); |
| 632 |
unset($_COOKIE['$Domain']); |
| 633 |
|
| 634 |
foreach ($_COOKIE as $key => $val) |
| 635 |
{ |
| 636 |
$_COOKIE[$this->_clean_input_keys($key)] = $this->_clean_input_data($val); |
| 637 |
} |
| 638 |
} |
| 639 |
|
| 640 |
// Sanitize PHP_SELF |
| 641 |
$_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']); |
| 642 |
|
| 643 |
|
| 644 |
// CSRF Protection check on HTTP requests |
| 645 |
if ($this->_enable_csrf == TRUE && ! $this->is_cli_request()) |
| 646 |
{ |
| 647 |
$this->security->csrf_verify(); |
| 648 |
} |
| 649 |
|
| 650 |
log_message('debug', "Global POST and COOKIE data sanitized"); |
| 651 |
} |
| 652 |
|
| 653 |
// -------------------------------------------------------------------- |
| 654 |
|
| 655 |
/** |
| 656 |
* Clean Input Data |
| 657 |
* |
| 658 |
* This is a helper function. It escapes data and |
| 659 |
* standardizes newline characters to \n |
| 660 |
* |
| 661 |
* @access private |
| 662 |
* @param string |
| 663 |
* @return string |
| 664 |
*/ |
| 665 |
function _clean_input_data($str) |
| 666 |
{ |
| 667 |
if (is_array($str)) |
| 668 |
{ |
| 669 |
$new_array = array(); |
| 670 |
foreach ($str as $key => $val) |
| 671 |
{ |
| 672 |
$new_array[$this->_clean_input_keys($key)] = $this->_clean_input_data($val); |
| 673 |
} |
| 674 |
return $new_array; |
| 675 |
} |
| 676 |
|
| 677 |
/* We strip slashes if magic quotes is on to keep things consistent |
| 678 |
|
| 679 |
NOTE: In PHP 5.4 get_magic_quotes_gpc() will always return 0 and |
| 680 |
it will probably not exist in future versions at all. |
| 681 |
*/ |
| 682 |
if ( ! is_php('5.4') && get_magic_quotes_gpc()) |
| 683 |
{ |
| 684 |
$str = stripslashes($str); |
| 685 |
} |
| 686 |
|
| 687 |
// Clean UTF-8 if supported |
| 688 |
if (UTF8_ENABLED === TRUE) |
| 689 |
{ |
| 690 |
$str = $this->uni->clean_string($str); |
| 691 |
} |
| 692 |
|
| 693 |
// Remove control characters |
| 694 |
$str = remove_invisible_characters($str); |
| 695 |
|
| 696 |
// Should we filter the input data? |
| 697 |
if ($this->_enable_xss === TRUE) |
| 698 |
{ |
| 699 |
$str = $this->security->xss_clean($str); |
| 700 |
} |
| 701 |
|
| 702 |
// Standardize newlines if needed |
| 703 |
if ($this->_standardize_newlines == TRUE) |
| 704 |
{ |
| 705 |
if (strpos($str, "\r") !== FALSE) |
| 706 |
{ |
| 707 |
$str = str_replace(array("\r\n", "\r", "\r\n\n"), PHP_EOL, $str); |
| 708 |
} |
| 709 |
} |
| 710 |
|
| 711 |
return $str; |
| 712 |
} |
| 713 |
|
| 714 |
// -------------------------------------------------------------------- |
| 715 |
|
| 716 |
/** |
| 717 |
* Clean Keys |
| 718 |
* |
| 719 |
* This is a helper function. To prevent malicious users |
| 720 |
* from trying to exploit keys we make sure that keys are |
| 721 |
* only named with alpha-numeric text and a few other items. |
| 722 |
* |
| 723 |
* @access private |
| 724 |
* @param string |
| 725 |
* @return string |
| 726 |
*/ |
| 727 |
function _clean_input_keys($str) |
| 728 |
{ |
| 729 |
if ( ! preg_match("/^[a-z0-9:_\/-]+$/i", $str)) |
| 730 |
{ |
| 731 |
exit('Disallowed Key Characters.'); |
| 732 |
} |
| 733 |
|
| 734 |
// Clean UTF-8 if supported |
| 735 |
if (UTF8_ENABLED === TRUE) |
| 736 |
{ |
| 737 |
$str = $this->uni->clean_string($str); |
| 738 |
} |
| 739 |
|
| 740 |
return $str; |
| 741 |
} |
| 742 |
|
| 743 |
// -------------------------------------------------------------------- |
| 744 |
|
| 745 |
/** |
| 746 |
* Request Headers |
| 747 |
* |
| 748 |
* In Apache, you can simply call apache_request_headers(), however for |
| 749 |
* people running other webservers the function is undefined. |
| 750 |
* |
| 751 |
* @param bool XSS cleaning |
| 752 |
* |
| 753 |
* @return array |
| 754 |
*/ |
| 755 |
public function request_headers($xss_clean = FALSE) |
| 756 |
{ |
| 757 |
// Look at Apache go! |
| 758 |
if (function_exists('apache_request_headers')) |
| 759 |
{ |
| 760 |
$headers = apache_request_headers(); |
| 761 |
} |
| 762 |
else |
| 763 |
{ |
| 764 |
$headers['Content-Type'] = (isset($_SERVER['CONTENT_TYPE'])) ? $_SERVER['CONTENT_TYPE'] : @getenv('CONTENT_TYPE'); |
| 765 |
|
| 766 |
foreach ($_SERVER as $key => $val) |
| 767 |
{ |
| 768 |
if (strncmp($key, 'HTTP_', 5) === 0) |
| 769 |
{ |
| 770 |
$headers[substr($key, 5)] = $this->_fetch_from_array($_SERVER, $key, $xss_clean); |
| 771 |
} |
| 772 |
} |
| 773 |
} |
| 774 |
|
| 775 |
// take SOME_HEADER and turn it into Some-Header |
| 776 |
foreach ($headers as $key => $val) |
| 777 |
{ |
| 778 |
$key = str_replace('_', ' ', strtolower($key)); |
| 779 |
$key = str_replace(' ', '-', ucwords($key)); |
| 780 |
|
| 781 |
$this->headers[$key] = $val; |
| 782 |
} |
| 783 |
|
| 784 |
return $this->headers; |
| 785 |
} |
| 786 |
|
| 787 |
// -------------------------------------------------------------------- |
| 788 |
|
| 789 |
/** |
| 790 |
* Get Request Header |
| 791 |
* |
| 792 |
* Returns the value of a single member of the headers class member |
| 793 |
* |
| 794 |
* @param string array key for $this->headers |
| 795 |
* @param boolean XSS Clean or not |
| 796 |
* @return mixed FALSE on failure, string on success |
| 797 |
*/ |
| 798 |
public function get_request_header($index, $xss_clean = FALSE) |
| 799 |
{ |
| 800 |
if (empty($this->headers)) |
| 801 |
{ |
| 802 |
$this->request_headers(); |
| 803 |
} |
| 804 |
|
| 805 |
if ( ! isset($this->headers[$index])) |
| 806 |
{ |
| 807 |
return FALSE; |
| 808 |
} |
| 809 |
|
| 810 |
if ($xss_clean === TRUE) |
| 811 |
{ |
| 812 |
return $this->security->xss_clean($this->headers[$index]); |
| 813 |
} |
| 814 |
|
| 815 |
return $this->headers[$index]; |
| 816 |
} |
| 817 |
|
| 818 |
// -------------------------------------------------------------------- |
| 819 |
|
| 820 |
/** |
| 821 |
* Is ajax Request? |
| 822 |
* |
| 823 |
* Test to see if a request contains the HTTP_X_REQUESTED_WITH header |
| 824 |
* |
| 825 |
* @return boolean |
| 826 |
*/ |
| 827 |
public function is_ajax_request() |
| 828 |
{ |
| 829 |
return ($this->server('HTTP_X_REQUESTED_WITH') === 'XMLHttpRequest'); |
| 830 |
} |
| 831 |
|
| 832 |
// -------------------------------------------------------------------- |
| 833 |
|
| 834 |
/** |
| 835 |
* Is cli Request? |
| 836 |
* |
| 837 |
* Test to see if a request was made from the command line |
| 838 |
* |
| 839 |
* @return bool |
| 840 |
*/ |
| 841 |
public function is_cli_request() |
| 842 |
{ |
| 843 |
return (php_sapi_name() === 'cli' OR defined('STDIN')); |
| 844 |
} |
| 845 |
|
| 846 |
} |
| 847 |
|
| 848 |
/* End of file Input.php */ |
| 849 |
/* Location: ./system/core/Input.php */ |
