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<?php |
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namespace Gongo\MercifulPolluter; |
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class Request extends Base |
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{ |
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private $magicQuotesGpc = false; |
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public function pollute() |
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{ |
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$this->injectFileToGlobal(); |
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$this->injectEGPCSToGlobal(); |
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} |
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public function enableMagicQuotesGpc() |
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{ |
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$this->magicQuotesGpc = true; |
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} |
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public function disableMagicQuotesGpc() |
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{ |
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$this->magicQuotesGpc = false; |
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} |
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/** |
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* Inject $_FILES to global variables. |
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* |
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* The naming rule when injected |
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* |
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* $_FILES['upfile']['tmp_name'] => $upfile |
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* $_FILES['upfile']['size'] => $upfile_size |
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* $_FILES['upfile']['type'] => $upfile_type |
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* |
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*/ |
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private function injectFileToGlobal() |
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{ |
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foreach ($_FILES as $field => $info) { |
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$values = array(); |
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foreach ($info as $key => $value) { |
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if ($key === 'tmp_name') { |
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$name = $field; |
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} else { |
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$name = "${field}_${key}"; |
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} |
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$values[$name] = $value; |
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} |
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$this->injectToGlobal($values); |
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} |
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} |
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/** |
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* Inject `EGPCS` to global variables. |
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* |
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* `EGPCS` means $_ENV, $_GET, $_POST, $_COOKIE and $_SERVER. |
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* |
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* If beforehand call `enableMagicQuotesGpc()`, |
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* applies `addslashes` $_GET, $_POST, $_COOKIE and those inject variables. |
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*/ |
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private function injectEGPCSToGlobal() |
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{ |
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$injectedFlag = array( |
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'e' => false, |
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'g' => false, |
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'p' => false, |
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'c' => false, |
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's' => false |
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); |
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foreach ($this->getInjectVariables() as $name) { |
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if (!isset($injectedFlag[$name]) || $injectedFlag[$name]) { |
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continue; |
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} |
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switch ($name) { |
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case 'e': |
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$this->injectToGlobal($_ENV); |
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break; |
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case 'g': |
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if ($this->magicQuotesGpc) { |
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$this->addSlashesRecursive($_GET); |
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} |
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$this->injectToGlobal($_GET); |
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break; |
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case 'p': |
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if ($this->magicQuotesGpc) { |
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$this->addSlashesRecursive($_POST); |
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} |
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$this->injectToGlobal($_POST); |
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break; |
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case 'c': |
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if ($this->magicQuotesGpc) { |
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$this->addSlashesRecursive($_COOKIE); |
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} |
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$this->injectToGlobal($_COOKIE); |
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break; |
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case 's': |
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$this->injectToGlobal($_SERVER); |
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break; |
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} |
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$injectedFlag[$name] = true; |
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} |
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} |
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/** |
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* @return array |
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*/ |
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protected function getInjectVariables() |
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{ |
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return str_split(strtolower(ini_get('variables_order'))); |
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} |
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114
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/** |
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* Recursively applies `addslashes` to each element of the array recursive. |
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* |
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* This method is **bang** . |
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*/ |
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private function addSlashesRecursive(&$theVariables) |
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{ |
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array_walk_recursive( |
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$theVariables, |
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function (&$value) { |
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$value = addslashes($value); |
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} |
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); |
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} |
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128
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protected function injectToGlobal(array $theVariables) |
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{ |
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foreach ($theVariables as $name => $value) { |
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if ($this->ignoringVariable($name)) { |
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continue; |
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} |
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135
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136
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$GLOBALS[$name] = $value; |
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137
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} |
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138
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} |
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139
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} |
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gongo /
merciful-polluter
