| 1 | <?php |
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| 2 | |
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| 3 | /** |
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| 4 | * Security class for Workflow module. |
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| 5 | * |
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| 6 | * @author Pedro Eugênio Rocha |
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| 7 | * @package Security |
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| 8 | * @static |
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| 9 | */ |
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| 10 | class Security { |
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| 11 | |
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| 12 | /** |
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| 13 | * @var boolean $_protection Stores the current security mode. |
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| 14 | * @access private |
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| 15 | * @static |
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| 16 | */ |
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| 17 | private static $_protection = false; |
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| 18 | |
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| 19 | |
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| 20 | /** |
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| 21 | * Disallow the instantiation of this class. |
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| 22 | * @access public |
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| 23 | * @return void |
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| 24 | */ |
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| 25 | public function __construct() { |
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| 26 | throw new Exception("Oops! Static only class."); |
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| 27 | } |
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| 28 | |
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| 29 | |
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| 30 | /** |
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| 31 | * Returns the current security mode. |
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| 32 | * @access public |
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| 33 | * @return boolean |
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| 34 | */ |
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| 35 | public static function isEnabled() { |
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| 36 | return self::$_protection; |
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| 37 | } |
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| 38 | |
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| 39 | |
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| 40 | /** |
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| 41 | * Change to secured mode. |
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| 42 | * @access public |
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| 43 | * @return boolean |
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| 44 | * @static |
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| 45 | */ |
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| 46 | public static function enable() { |
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| 47 | |
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| 48 | if (self::_isAllowed()) |
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| 49 | self::$_protection = true; |
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| 50 | else |
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| 51 | throw new Exception('You are not allowed to change security mode.'); |
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| 52 | return true; |
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| 53 | } |
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| 54 | |
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| 55 | /** |
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| 56 | * Change to unsecured mode. |
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| 57 | * @access public |
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| 58 | * @return boolean |
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| 59 | * @static |
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| 60 | */ |
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| 61 | public static function disable() { |
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| 62 | |
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| 63 | if (self::_isAllowed()) |
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| 64 | self::$_protection = false; |
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| 65 | else |
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| 66 | throw new Exception('You are not allowed to change security mode.'); |
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| 67 | return true; |
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| 68 | } |
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| 69 | |
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| 70 | |
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| 71 | /** |
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| 72 | * This function do all the security stuff. |
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| 73 | * Here we must define in which files we are able |
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| 74 | * to change the security mode. |
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| 75 | * |
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| 76 | * @access private |
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| 77 | * @return boolean |
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| 78 | * @static |
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| 79 | */ |
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| 80 | private static function _isAllowed() { |
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| 81 | $backtrace = debug_backtrace(); |
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| 82 | |
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| 83 | /* TODO - These are not definitive validations */ |
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| 84 | /* $backtrace[1] specifies the imediate antecessor function */ |
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| 85 | $basedir = dirname($backtrace[1]['file']); |
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| 86 | |
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| 87 | if ($basedir == dirname(__FILE__)) |
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| 88 | return true; |
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| 89 | return false; |
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| 90 | } |
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| 91 | } |
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| 92 | |
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| 93 | ?> |
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