diff --git a/htdocs/application/core/Input.php b/htdocs/application/core/Input.php deleted file mode 100644 index 2521c20..0000000 --- a/htdocs/application/core/Input.php +++ /dev/null @@ -1,850 +0,0 @@ -_allow_get_array = (config_item('allow_get_array') === TRUE); - $this->_enable_xss = (config_item('global_xss_filtering') === TRUE); - $this->_enable_csrf = (config_item('csrf_protection') === TRUE); - - global $SEC; - $this->security =& $SEC; - - // Do we need the UTF-8 class? - if (UTF8_ENABLED === TRUE) - { - global $UNI; - $this->uni =& $UNI; - } - - // Sanitize global arrays - $this->_sanitize_globals(); - } - - // -------------------------------------------------------------------- - - /** - * Fetch from array - * - * This is a helper function to retrieve values from global arrays - * - * @access private - * @param array - * @param string - * @param bool - * @return string - */ - function _fetch_from_array(&$array, $index = '', $xss_clean = FALSE) - { - if ( ! isset($array[$index])) - { - return FALSE; - } - - if ($xss_clean === TRUE) - { - return $this->security->xss_clean($array[$index]); - } - - return $array[$index]; - } - - // -------------------------------------------------------------------- - - /** - * Fetch an item from the GET array - * - * @access public - * @param string - * @param bool - * @return string - */ - function get($index = NULL, $xss_clean = FALSE) - { - // Check if a field has been provided - if ($index === NULL AND ! empty($_GET)) - { - $get = array(); - - // loop through the full _GET array - foreach (array_keys($_GET) as $key) - { - $get[$key] = $this->_fetch_from_array($_GET, $key, $xss_clean); - } - return $get; - } - - return $this->_fetch_from_array($_GET, $index, $xss_clean); - } - - // -------------------------------------------------------------------- - - /** - * Fetch an item from the POST array - * - * @access public - * @param string - * @param bool - * @return string - */ - function post($index = NULL, $xss_clean = FALSE) - { - // Check if a field has been provided - if ($index === NULL AND ! empty($_POST)) - { - $post = array(); - - // Loop through the full _POST array and return it - foreach (array_keys($_POST) as $key) - { - $post[$key] = $this->_fetch_from_array($_POST, $key, $xss_clean); - } - return $post; - } - - return $this->_fetch_from_array($_POST, $index, $xss_clean); - } - - - // -------------------------------------------------------------------- - - /** - * Fetch an item from either the GET array or the POST - * - * @access public - * @param string The index key - * @param bool XSS cleaning - * @return string - */ - function get_post($index = '', $xss_clean = FALSE) - { - if ( ! isset($_POST[$index]) ) - { - return $this->get($index, $xss_clean); - } - else - { - return $this->post($index, $xss_clean); - } - } - - // -------------------------------------------------------------------- - - /** - * Fetch an item from the COOKIE array - * - * @access public - * @param string - * @param bool - * @return string - */ - function cookie($index = '', $xss_clean = FALSE) - { - return $this->_fetch_from_array($_COOKIE, $index, $xss_clean); - } - - // ------------------------------------------------------------------------ - - /** - * Set cookie - * - * Accepts six parameter, or you can submit an associative - * array in the first parameter containing all the values. - * - * @access public - * @param mixed - * @param string the value of the cookie - * @param string the number of seconds until expiration - * @param string the cookie domain. Usually: .yourdomain.com - * @param string the cookie path - * @param string the cookie prefix - * @param bool true makes the cookie secure - * @return void - */ - function set_cookie($name = '', $value = '', $expire = '', $domain = '', $path = '/', $prefix = '', $secure = FALSE) - { - if (is_array($name)) - { - // always leave 'name' in last place, as the loop will break otherwise, due to $$item - foreach (array('value', 'expire', 'domain', 'path', 'prefix', 'secure', 'name') as $item) - { - if (isset($name[$item])) - { - $$item = $name[$item]; - } - } - } - - if ($prefix == '' AND config_item('cookie_prefix') != '') - { - $prefix = config_item('cookie_prefix'); - } - if ($domain == '' AND config_item('cookie_domain') != '') - { - $domain = config_item('cookie_domain'); - } - if ($path == '/' AND config_item('cookie_path') != '/') - { - $path = config_item('cookie_path'); - } - if ($secure == FALSE AND config_item('cookie_secure') != FALSE) - { - $secure = config_item('cookie_secure'); - } - - if ( ! is_numeric($expire)) - { - $expire = time() - 86500; - } - else - { - $expire = ($expire > 0) ? time() + $expire : 0; - } - - setcookie($prefix.$name, $value, $expire, $path, $domain, $secure); - } - - // -------------------------------------------------------------------- - - /** - * Fetch an item from the SERVER array - * - * @access public - * @param string - * @param bool - * @return string - */ - function server($index = '', $xss_clean = FALSE) - { - return $this->_fetch_from_array($_SERVER, $index, $xss_clean); - } - - // -------------------------------------------------------------------- - - /** - * Fetch the IP Address - * - * @return string - */ - public function ip_address() - { - if ($this->ip_address !== FALSE) - { - return $this->ip_address; - } - - $proxy_ips = config_item('proxy_ips'); - if ( ! empty($proxy_ips)) - { - $proxy_ips = explode(',', str_replace(' ', '', $proxy_ips)); - foreach (array('HTTP_X_FORWARDED_FOR', 'HTTP_CLIENT_IP', 'HTTP_X_CLIENT_IP', 'HTTP_X_CLUSTER_CLIENT_IP') as $header) - { - if (($spoof = $this->server($header)) !== FALSE) - { - // Some proxies typically list the whole chain of IP - // addresses through which the client has reached us. - // e.g. client_ip, proxy_ip1, proxy_ip2, etc. - if (strpos($spoof, ',') !== FALSE) - { - $spoof = explode(',', $spoof, 2); - $spoof = $spoof[0]; - } - - if ( ! $this->valid_ip($spoof)) - { - $spoof = FALSE; - } - else - { - break; - } - } - } - - $this->ip_address = ($spoof !== FALSE && in_array($_SERVER['REMOTE_ADDR'], $proxy_ips, TRUE)) - ? $spoof : $_SERVER['REMOTE_ADDR']; - } - else - { - $this->ip_address = $_SERVER['REMOTE_ADDR']; - } - - if ( ! $this->valid_ip($this->ip_address)) - { - $this->ip_address = '0.0.0.0'; - } - - return $this->ip_address; - } - - // -------------------------------------------------------------------- - - /** - * Validate IP Address - * - * @access public - * @param string - * @param string ipv4 or ipv6 - * @return bool - */ - public function valid_ip($ip, $which = '') - { - $which = strtolower($which); - - // First check if filter_var is available - if (is_callable('filter_var')) - { - switch ($which) { - case 'ipv4': - $flag = FILTER_FLAG_IPV4; - break; - case 'ipv6': - $flag = FILTER_FLAG_IPV6; - break; - default: - $flag = ''; - break; - } - - return (bool) filter_var($ip, FILTER_VALIDATE_IP, $flag); - } - - if ($which !== 'ipv6' && $which !== 'ipv4') - { - if (strpos($ip, ':') !== FALSE) - { - $which = 'ipv6'; - } - elseif (strpos($ip, '.') !== FALSE) - { - $which = 'ipv4'; - } - else - { - return FALSE; - } - } - - $func = '_valid_'.$which; - return $this->$func($ip); - } - - // -------------------------------------------------------------------- - - /** - * Validate IPv4 Address - * - * Updated version suggested by Geert De Deckere - * - * @access protected - * @param string - * @return bool - */ - protected function _valid_ipv4($ip) - { - $ip_segments = explode('.', $ip); - - // Always 4 segments needed - if (count($ip_segments) !== 4) - { - return FALSE; - } - // IP can not start with 0 - if ($ip_segments[0][0] == '0') - { - return FALSE; - } - - // Check each segment - foreach ($ip_segments as $segment) - { - // IP segments must be digits and can not be - // longer than 3 digits or greater then 255 - if ($segment == '' OR preg_match("/[^0-9]/", $segment) OR $segment > 255 OR strlen($segment) > 3) - { - return FALSE; - } - } - - return TRUE; - } - - // -------------------------------------------------------------------- - - /** - * Validate IPv6 Address - * - * @access protected - * @param string - * @return bool - */ - protected function _valid_ipv6($str) - { - // 8 groups, separated by : - // 0-ffff per group - // one set of consecutive 0 groups can be collapsed to :: - - $groups = 8; - $collapsed = FALSE; - - $chunks = array_filter( - preg_split('/(:{1,2})/', $str, NULL, PREG_SPLIT_DELIM_CAPTURE) - ); - - // Rule out easy nonsense - if (current($chunks) == ':' OR end($chunks) == ':') - { - return FALSE; - } - - // PHP supports IPv4-mapped IPv6 addresses, so we'll expect those as well - if (strpos(end($chunks), '.') !== FALSE) - { - $ipv4 = array_pop($chunks); - - if ( ! $this->_valid_ipv4($ipv4)) - { - return FALSE; - } - - $groups--; - } - - while ($seg = array_pop($chunks)) - { - if ($seg[0] == ':') - { - if (--$groups == 0) - { - return FALSE; // too many groups - } - - if (strlen($seg) > 2) - { - return FALSE; // long separator - } - - if ($seg == '::') - { - if ($collapsed) - { - return FALSE; // multiple collapsed - } - - $collapsed = TRUE; - } - } - elseif (preg_match("/[^0-9a-f]/i", $seg) OR strlen($seg) > 4) - { - return FALSE; // invalid segment - } - } - - return $collapsed OR $groups == 1; - } - - // -------------------------------------------------------------------- - - /** - * User Agent - * - * @access public - * @return string - */ - function user_agent() - { - if ($this->user_agent !== FALSE) - { - return $this->user_agent; - } - - $this->user_agent = ( ! isset($_SERVER['HTTP_USER_AGENT'])) ? FALSE : $_SERVER['HTTP_USER_AGENT']; - - return $this->user_agent; - } - - // -------------------------------------------------------------------- - - /** - * Sanitize Globals - * - * This function does the following: - * - * Unsets $_GET data (if query strings are not enabled) - * - * Unsets all globals if register_globals is enabled - * - * Standardizes newline characters to \n - * - * @access private - * @return void - */ - function _sanitize_globals() - { - // It would be "wrong" to unset any of these GLOBALS. - $protected = array('_SERVER', '_GET', '_POST', '_FILES', '_REQUEST', - '_SESSION', '_ENV', 'GLOBALS', 'HTTP_RAW_POST_DATA', - 'system_folder', 'application_folder', 'BM', 'EXT', - 'CFG', 'URI', 'RTR', 'OUT', 'IN'); - - // Unset globals for securiy. - // This is effectively the same as register_globals = off - foreach (array($_GET, $_POST, $_COOKIE) as $global) - { - if ( ! is_array($global)) - { - if ( ! in_array($global, $protected)) - { - global $$global; - $$global = NULL; - } - } - else - { - foreach ($global as $key => $val) - { - if ( ! in_array($key, $protected)) - { - global $$key; - $$key = NULL; - } - } - } - } - - // Is $_GET data allowed? If not we'll set the $_GET to an empty array - if ($this->_allow_get_array == FALSE) - { - $_GET = array(); - } - else - { - if (is_array($_GET) AND count($_GET) > 0) - { - foreach ($_GET as $key => $val) - { - $_GET[$this->_clean_input_keys($key)] = $this->_clean_input_data($val); - } - } - } - - // Clean $_POST Data - if (is_array($_POST) AND count($_POST) > 0) - { - foreach ($_POST as $key => $val) - { - $_POST[$this->_clean_input_keys($key)] = $this->_clean_input_data($val); - } - } - - // Clean $_COOKIE Data - if (is_array($_COOKIE) AND count($_COOKIE) > 0) - { - // Also get rid of specially treated cookies that might be set by a server - // or silly application, that are of no use to a CI application anyway - // but that when present will trip our 'Disallowed Key Characters' alarm - // http://www.ietf.org/rfc/rfc2109.txt - // note that the key names below are single quoted strings, and are not PHP variables - unset($_COOKIE['$Version']); - unset($_COOKIE['$Path']); - unset($_COOKIE['$Domain']); - - foreach ($_COOKIE as $key => $val) - { - $_COOKIE[$this->_clean_input_keys($key)] = $this->_clean_input_data($val); - } - } - - // Sanitize PHP_SELF - $_SERVER['PHP_SELF'] = strip_tags($_SERVER['PHP_SELF']); - - - // CSRF Protection check on HTTP requests - if ($this->_enable_csrf == TRUE && ! $this->is_cli_request()) - { - $this->security->csrf_verify(); - } - - log_message('debug', "Global POST and COOKIE data sanitized"); - } - - // -------------------------------------------------------------------- - - /** - * Clean Input Data - * - * This is a helper function. It escapes data and - * standardizes newline characters to \n - * - * @access private - * @param string - * @return string - */ - function _clean_input_data($str) - { - if (is_array($str)) - { - $new_array = array(); - foreach ($str as $key => $val) - { - $new_array[$this->_clean_input_keys($key)] = $this->_clean_input_data($val); - } - return $new_array; - } - - /* We strip slashes if magic quotes is on to keep things consistent - - NOTE: In PHP 5.4 get_magic_quotes_gpc() will always return 0 and - it will probably not exist in future versions at all. - */ - if ( ! is_php('5.4') && get_magic_quotes_gpc()) - { - $str = stripslashes($str); - } - - // Clean UTF-8 if supported - if (UTF8_ENABLED === TRUE) - { - $str = $this->uni->clean_string($str); - } - - // Remove control characters - // Commented out by Claude for Stikked (https://github.com/claudehohl/Stikked/issues/28) - //$str = remove_invisible_characters($str); - - // Should we filter the input data? - if ($this->_enable_xss === TRUE) - { - $str = $this->security->xss_clean($str); - } - - // Standardize newlines if needed - if ($this->_standardize_newlines == TRUE) - { - if (strpos($str, "\r") !== FALSE) - { - $str = str_replace(array("\r\n", "\r", "\r\n\n"), PHP_EOL, $str); - } - } - - return $str; - } - - // -------------------------------------------------------------------- - - /** - * Clean Keys - * - * This is a helper function. To prevent malicious users - * from trying to exploit keys we make sure that keys are - * only named with alpha-numeric text and a few other items. - * - * @access private - * @param string - * @return string - */ - function _clean_input_keys($str) - { - if ( ! preg_match("/^[a-z0-9:_\/-]+$/i", $str)) - { - exit('Disallowed Key Characters.'); - } - - // Clean UTF-8 if supported - if (UTF8_ENABLED === TRUE) - { - $str = $this->uni->clean_string($str); - } - - return $str; - } - - // -------------------------------------------------------------------- - - /** - * Request Headers - * - * In Apache, you can simply call apache_request_headers(), however for - * people running other webservers the function is undefined. - * - * @param bool XSS cleaning - * - * @return array - */ - public function request_headers($xss_clean = FALSE) - { - // Look at Apache go! - if (function_exists('apache_request_headers')) - { - $headers = apache_request_headers(); - } - else - { - $headers['Content-Type'] = (isset($_SERVER['CONTENT_TYPE'])) ? $_SERVER['CONTENT_TYPE'] : @getenv('CONTENT_TYPE'); - - foreach ($_SERVER as $key => $val) - { - if (strncmp($key, 'HTTP_', 5) === 0) - { - $headers[substr($key, 5)] = $this->_fetch_from_array($_SERVER, $key, $xss_clean); - } - } - } - - // take SOME_HEADER and turn it into Some-Header - foreach ($headers as $key => $val) - { - $key = str_replace('_', ' ', strtolower($key)); - $key = str_replace(' ', '-', ucwords($key)); - - $this->headers[$key] = $val; - } - - return $this->headers; - } - - // -------------------------------------------------------------------- - - /** - * Get Request Header - * - * Returns the value of a single member of the headers class member - * - * @param string array key for $this->headers - * @param boolean XSS Clean or not - * @return mixed FALSE on failure, string on success - */ - public function get_request_header($index, $xss_clean = FALSE) - { - if (empty($this->headers)) - { - $this->request_headers(); - } - - if ( ! isset($this->headers[$index])) - { - return FALSE; - } - - if ($xss_clean === TRUE) - { - return $this->security->xss_clean($this->headers[$index]); - } - - return $this->headers[$index]; - } - - // -------------------------------------------------------------------- - - /** - * Is ajax Request? - * - * Test to see if a request contains the HTTP_X_REQUESTED_WITH header - * - * @return boolean - */ - public function is_ajax_request() - { - return ($this->server('HTTP_X_REQUESTED_WITH') === 'XMLHttpRequest'); - } - - // -------------------------------------------------------------------- - - /** - * Is cli Request? - * - * Test to see if a request was made from the command line - * - * @return bool - */ - public function is_cli_request() - { - return (php_sapi_name() === 'cli' OR defined('STDIN')); - } - -} - -/* End of file Input.php */ -/* Location: ./system/core/Input.php */