geekwright /
XoopsCore25
| Total Complexity | 40 |
| Total Lines | 259 |
| Duplicated Lines | 0 % |
| Changes | 1 | ||
| Bugs | 0 | Features | 0 |
Complex classes like XoopsSecurity often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use XoopsSecurity, and based on these observations, apply Extract Interface, too.
| 1 | <?php |
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| 29 | class XoopsSecurity |
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| 30 | { |
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| 31 | public $errors = array(); |
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| 32 | |||
| 33 | /** |
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| 34 | * Check if there is a valid token in $_REQUEST[$name . '_REQUEST'] - can be expanded for more wide use, later (Mith) |
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| 35 | * |
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| 36 | * @param bool $clearIfValid whether to clear the token after validation |
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| 37 | * @param string|false $token token to validate |
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| 38 | * @param string $name name of session variable |
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| 39 | * |
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| 40 | * @return bool |
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| 41 | */ |
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| 42 | public function check($clearIfValid = true, $token = false, $name = 'XOOPS_TOKEN') |
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| 43 | { |
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| 44 | return $this->validateToken($token, $clearIfValid, $name); |
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| 45 | } |
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| 46 | |||
| 47 | /** |
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| 48 | * Create a token in the user's session |
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| 49 | * |
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| 50 | * @param int|string $timeout time in seconds the token should be valid |
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| 51 | * @param string $name name of session variable |
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| 52 | * |
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| 53 | * @return string token value |
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| 54 | */ |
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| 55 | public function createToken($timeout = 0, $name = 'XOOPS_TOKEN') |
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| 56 | { |
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| 57 | $this->garbageCollection($name); |
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| 58 | if ($timeout == 0) { |
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| 59 | $expire = @ini_get('session.gc_maxlifetime'); |
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| 60 | $timeout = ($expire > 0) ? $expire : 900; |
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| 61 | } |
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| 62 | $token_id = md5(uniqid(mt_rand(), true)); |
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| 63 | // save token data on the server |
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| 64 | if (!isset($_SESSION[$name . '_SESSION'])) { |
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| 65 | $_SESSION[$name . '_SESSION'] = array(); |
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| 66 | } |
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| 67 | $token_data = array( |
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| 68 | 'id' => $token_id, |
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| 69 | 'expire' => time() + (int)$timeout); |
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| 70 | $_SESSION[$name . '_SESSION'][] = $token_data; |
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| 71 | |||
| 72 | return md5($token_id . $_SERVER['HTTP_USER_AGENT'] . XOOPS_DB_PREFIX); |
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| 73 | } |
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| 74 | |||
| 75 | /** |
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| 76 | * Check if a token is valid. If no token is specified, $_REQUEST[$name . '_REQUEST'] is checked |
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| 77 | * |
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| 78 | * @param string|false $token token to validate |
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| 79 | * @param bool $clearIfValid whether to clear the token value if valid |
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| 80 | * @param string $name session name to validate |
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| 81 | * |
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| 82 | * @return bool |
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| 83 | */ |
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| 84 | public function validateToken($token = false, $clearIfValid = true, $name = 'XOOPS_TOKEN') |
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| 85 | { |
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| 86 | global $xoopsLogger; |
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| 87 | $token = ($token !== false) ? $token : (isset($_REQUEST[$name . '_REQUEST']) ? $_REQUEST[$name . '_REQUEST'] : ''); |
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| 88 | if (empty($token) || empty($_SESSION[$name . '_SESSION'])) { |
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| 89 | $xoopsLogger->addExtra('Token Validation', 'No valid token found in request/session'); |
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| 90 | |||
| 91 | return false; |
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| 92 | } |
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| 93 | $validFound = false; |
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| 94 | $token_data = &$_SESSION[$name . '_SESSION']; |
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| 95 | foreach (array_keys($token_data) as $i) { |
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| 96 | if ($token === md5($token_data[$i]['id'] . $_SERVER['HTTP_USER_AGENT'] . XOOPS_DB_PREFIX)) { |
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| 97 | if ($this->filterToken($token_data[$i])) { |
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| 98 | if ($clearIfValid) { |
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| 99 | // token should be valid once, so clear it once validated |
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| 100 | unset($token_data[$i]); |
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| 101 | } |
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| 102 | $xoopsLogger->addExtra('Token Validation', 'Valid token found'); |
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| 103 | $validFound = true; |
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| 104 | } else { |
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| 105 | $str = 'Valid token expired'; |
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| 106 | $this->setErrors($str); |
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| 107 | $xoopsLogger->addExtra('Token Validation', $str); |
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| 108 | } |
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| 109 | } |
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| 110 | } |
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| 111 | if (!$validFound && !isset($str)) { |
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| 112 | $str = 'No valid token found'; |
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| 113 | $this->setErrors($str); |
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| 114 | $xoopsLogger->addExtra('Token Validation', $str); |
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| 115 | } |
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| 116 | $this->garbageCollection($name); |
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| 117 | |||
| 118 | return $validFound; |
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| 119 | } |
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| 120 | |||
| 121 | /** |
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| 122 | * Clear all token values from user's session |
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| 123 | * |
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| 124 | * @param string $name session name |
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| 125 | * |
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| 126 | * @return void |
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| 127 | */ |
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| 128 | public function clearTokens($name = 'XOOPS_TOKEN') |
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| 129 | { |
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| 130 | $_SESSION[$name . '_SESSION'] = array(); |
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| 131 | } |
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| 132 | |||
| 133 | /** |
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| 134 | * Check whether a token value is expired or not |
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| 135 | * |
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| 136 | * @param string $token token |
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| 137 | * |
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| 138 | * @return bool |
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| 139 | */ |
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| 140 | public function filterToken($token) |
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| 141 | { |
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| 142 | return (!empty($token['expire']) && $token['expire'] >= time()); |
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| 143 | } |
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| 144 | |||
| 145 | /** |
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| 146 | * Perform garbage collection, clearing expired tokens |
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| 147 | * |
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| 148 | * @param string $name session name |
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| 149 | * |
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| 150 | * @return void |
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| 151 | */ |
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| 152 | public function garbageCollection($name = 'XOOPS_TOKEN') |
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| 153 | { |
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| 154 | $sessionName = $name . '_SESSION'; |
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| 155 | if (!empty($_SESSION[$sessionName]) && is_array($_SESSION[$sessionName])) { |
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| 156 | $_SESSION[$sessionName] = array_filter($_SESSION[$sessionName], array($this, 'filterToken')); |
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| 157 | } |
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| 158 | } |
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| 159 | |||
| 160 | /** |
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| 161 | * Check the user agent's HTTP REFERER against XOOPS_URL |
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| 162 | * |
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| 163 | * @param int $docheck 0 to not check the referer (used with XML-RPC), 1 to actively check it |
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| 164 | * |
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| 165 | * @return bool |
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| 166 | */ |
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| 167 | public function checkReferer($docheck = 1) |
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| 168 | { |
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| 169 | $ref = xoops_getenv('HTTP_REFERER'); |
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| 170 | if ($docheck == 0) { |
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| 171 | return true; |
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| 172 | } |
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| 173 | if ($ref == '') { |
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| 174 | return false; |
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| 175 | } |
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| 176 | return !(strpos($ref, XOOPS_URL) !== 0); |
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| 177 | } |
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| 178 | |||
| 179 | /** |
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| 180 | * Check superglobals for contamination |
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| 181 | * |
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| 182 | * @return void |
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| 183 | **/ |
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| 184 | public function checkSuperglobals() |
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| 216 | } |
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| 217 | } |
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| 218 | } |
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| 219 | |||
| 220 | /** |
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| 221 | * Check if visitor's IP address is banned |
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| 222 | * Should be changed to return bool and let the action be up to the calling script |
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| 223 | * |
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| 224 | * @return void |
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| 225 | */ |
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| 226 | public function checkBadips() |
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| 227 | { |
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| 228 | global $xoopsConfig; |
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| 229 | |||
| 230 | $addr = IPAddress::fromRequest(); |
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| 231 | $ip = $addr->asReadable(); |
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| 232 | if ($xoopsConfig['enable_badips'] == 1 && $ip != '0.0.0.0') { |
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| 233 | foreach ($xoopsConfig['bad_ips'] as $bi) { |
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| 234 | if (!empty($bi) && preg_match('/' . $bi . '/', $ip)) { |
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| 235 | exit(); |
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| 236 | } |
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| 237 | } |
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| 238 | } |
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| 239 | } |
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| 240 | |||
| 241 | /** |
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| 242 | * Get the HTML code for a XoopsFormHiddenToken object - used in forms that do not use XoopsForm elements |
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| 243 | * |
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| 244 | * @param string $name session token name |
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| 245 | * |
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| 246 | * @return string |
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| 247 | */ |
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| 248 | public function getTokenHTML($name = 'XOOPS_TOKEN') |
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| 249 | { |
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| 250 | require_once XOOPS_ROOT_PATH . '/class/xoopsformloader.php'; |
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| 251 | $token = new XoopsFormHiddenToken($name); |
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| 252 | |||
| 253 | return $token->render(); |
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| 254 | } |
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| 255 | |||
| 256 | /** |
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| 257 | * Add an error |
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| 258 | * |
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| 259 | * @param string $error message |
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| 260 | * |
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| 261 | * @return void |
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| 262 | */ |
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| 263 | public function setErrors($error) |
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| 264 | { |
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| 265 | $this->errors[] = trim($error); |
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| 266 | } |
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| 267 | |||
| 268 | /** |
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| 269 | * Get generated errors |
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| 270 | * |
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| 271 | * @param bool $ashtml Format using HTML? |
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| 272 | * |
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| 273 | * @return array|string Array of array messages OR HTML string |
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| 274 | */ |
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| 275 | public function &getErrors($ashtml = false) |
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| 288 | } |
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| 289 | } |
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| 290 | } |
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| 291 |
In general, usage of exit should be done with care and only when running in a scripting context like a CLI script.