| 1 | <?php |
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| 2 | /**************************************************************************\ |
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| 3 | * eGroupWare * |
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| 4 | * http://www.egroupware.org * |
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| 5 | * -------------------------------------------- * |
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| 6 | * This program is free software; you can redistribute it and/or modify it * |
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| 7 | * under the terms of the GNU General Public License as published by the * |
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| 8 | * Free Software Foundation; either version 2 of the License, or (at your * |
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| 9 | * option) any later version. * |
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| 10 | \**************************************************************************/ |
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| 11 | |
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| 12 | /** |
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| 13 | * Security class for Workflow module. |
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| 14 | * You should never forget to call 'enable' |
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| 15 | * public method to enable security before |
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| 16 | * executing process code. |
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| 17 | * |
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| 18 | * @package Factory |
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| 19 | * @license http://www.gnu.org/copyleft/gpl.html GPL |
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| 20 | * @author Pedro Eugênio Rocha - pedro.eugenio.rocha@gmail.com |
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| 21 | */ |
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| 22 | class Security { |
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| 23 | |
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| 24 | /** |
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| 25 | * @var boolean $_protection Stores the current security mode. |
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| 26 | * @access private |
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| 27 | * @static |
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| 28 | */ |
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| 29 | private static $_protection = false; |
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| 30 | |
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| 31 | |
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| 32 | /** |
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| 33 | * Disallow the instantiation of this class. |
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| 34 | * @access public |
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| 35 | * @return void |
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| 36 | */ |
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| 37 | public function __construct() { |
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| 38 | throw new Exception("Oops! Static only class."); |
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| 39 | } |
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| 40 | |
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| 41 | |
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| 42 | /** |
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| 43 | * Returns the current security mode. |
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| 44 | * @access public |
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| 45 | * @return boolean |
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| 46 | */ |
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| 47 | public static function isEnabled() { |
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| 48 | return self::$_protection; |
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| 49 | } |
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| 50 | |
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| 51 | |
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| 52 | /** |
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| 53 | * Change to secured mode. |
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| 54 | * @access public |
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| 55 | * @return boolean |
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| 56 | * @static |
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| 57 | */ |
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| 58 | public static function enable() { |
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| 59 | |
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| 60 | if (self::_isAllowed()) |
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| 61 | self::$_protection = true; |
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| 62 | else |
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| 63 | throw new Exception('You are not allowed to change security mode.'); |
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| 64 | return true; |
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| 65 | } |
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| 66 | |
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| 67 | /** |
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| 68 | * Change to unsecured mode. |
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| 69 | * @access public |
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| 70 | * @return boolean |
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| 71 | * @static |
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| 72 | */ |
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| 73 | public static function disable() { |
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| 74 | |
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| 75 | if (self::_isAllowed()) |
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| 76 | self::$_protection = false; |
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| 77 | else |
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| 78 | throw new Exception('You are not allowed to change security mode.'); |
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| 79 | return true; |
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| 80 | } |
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| 81 | |
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| 82 | |
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| 83 | /** |
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| 84 | * This function do all the security stuff. |
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| 85 | * Here we must define in which files we are able |
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| 86 | * to change the security mode. |
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| 87 | * |
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| 88 | * @access private |
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| 89 | * @return boolean |
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| 90 | * @static |
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| 91 | */ |
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| 92 | private static function _isAllowed() { |
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| 93 | $backtrace = debug_backtrace(); |
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| 94 | |
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| 95 | /* TODO - These are not definitive validations */ |
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| 96 | /* $backtrace[1] specifies the imediate antecessor function */ |
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| 97 | $basedir = dirname($backtrace[1]['file']); |
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| 98 | |
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| 99 | if ($basedir == dirname(__FILE__)) |
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| 100 | return true; |
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| 101 | return false; |
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| 102 | } |
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| 103 | } |
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| 104 | |
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| 105 | ?> |
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