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<?php |
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// phpcs:disable WordPress.Security.EscapeOutput.ExceptionNotEscaped |
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if (!defined('ABSPATH') && !defined('MCDATAPATH')) exit; |
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|
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if (!class_exists('WPRProtectFWRuleEngine_V636')) : |
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require_once dirname( __FILE__ ) . '/functions.php'; |
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|
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class WPRProtectFWRuleEngine_V636 { |
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use WPRProtectFWRuleStringFunc_V636; |
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use WPRProtectFWRuleArrayFunc_V636; |
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use WPRProtectFWRuleMiscFunc_V636; |
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use WPRProtectFWRuleRequestFunc_V636; |
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use WPRProtectFWRuleWPFunc_V636; |
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|
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private $request; |
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private $variables; |
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|
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private $error; |
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private $ex_stack = array(); |
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private $ex_stack_inx = -1; |
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|
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const VERSION = 1.2; |
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|
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const MAX_DEPTH_TO_ALLOWED_TYPE_FUNC = 8; |
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const FUNC_NAME_PREFIX = '_rf_'; |
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const CONST_NAME_PREFIX = 'WPRProtectFWRule_V636::'; |
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const ALLOWED_EXT_CONSTANTS = [ |
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'DOING_CRON' |
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]; |
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|
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public function __construct($request = null, $variables = array()) { |
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$this->request = $request; |
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$this->variables = self::toAllowedType($variables); |
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} |
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|
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public function hasError() { |
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return isset($this->error); |
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} |
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|
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public function getErrorMessage() { |
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if (isset($this->error)) { |
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return $this->error->getMessage(); |
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} |
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} |
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|
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public function evaluate($rule) { |
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try { |
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return $this->executeStmt($rule->logic); |
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} catch (WPRProtectRuleError_V636 $e) { |
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$this->error = $e; |
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} |
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} |
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|
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private static function toAllowedType($value, $depth = 1) { |
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if ($depth > self::MAX_DEPTH_TO_ALLOWED_TYPE_FUNC) { |
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return null; |
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} |
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|
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switch (gettype($value)) { |
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case 'null': |
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case 'boolean': |
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case 'integer': |
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case 'double': |
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case 'string': |
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return $value; |
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case 'array': |
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$array_value = []; |
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|
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foreach ($value as $key => $val) { |
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$array_value[$key] = self::toAllowedType($val, $depth + 1); |
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} |
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|
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return $array_value; |
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case 'object': |
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$object_vars = []; |
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|
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foreach (get_object_vars($value) as $key => $val) { |
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$object_vars[$key] = self::toAllowedType($val, $depth + 1); |
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} |
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|
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return $object_vars; |
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default: |
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return null; |
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} |
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} |
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|
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private function pushExStack() { |
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array_push($this->ex_stack, array('cur_op' => '-', 'op_cnt' => 0)); |
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$this->ex_stack_inx += 1; |
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} |
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|
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private function popExStack() { |
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array_pop($this->ex_stack); |
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$this->ex_stack_inx -= 1; |
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} |
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|
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private function updateCurOp($cur_op) { |
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if (!empty($this->ex_stack[$this->ex_stack_inx])) { |
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$this->ex_stack[$this->ex_stack_inx]['cur_op'] = $cur_op; |
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} |
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} |
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|
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private function incrOpCnt() { |
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if (!empty($this->ex_stack[$this->ex_stack_inx])) { |
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$this->ex_stack[$this->ex_stack_inx]['op_cnt'] += 1; |
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} |
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} |
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|
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private function addExState($msg) { |
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if (!empty($this->ex_stack[$this->ex_stack_inx])) { |
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$msg .= " on " . $this->ex_stack[$this->ex_stack_inx]['cur_op']; |
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$msg .= " at (" . $this->ex_stack_inx . ":" . |
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$this->ex_stack[$this->ex_stack_inx]['op_cnt'] . ")."; |
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} |
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|
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return $msg; |
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} |
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|
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private function getValue($stmt) { |
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if (!is_array($stmt) || empty($stmt["type"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("InvalidStatementError: Malformed value statement")); |
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} |
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|
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$this->incrOpCnt(); |
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|
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switch ($stmt["type"]) { |
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case "NUMBER": |
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if (!isset($stmt["value"]) || !is_int($stmt["value"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: Value is not a number") |
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); |
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} |
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|
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return $stmt["value"]; |
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case "STRING": |
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if (!isset($stmt["value"]) || !is_string($stmt["value"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: Value is not a string") |
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); |
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} |
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|
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return $stmt["value"]; |
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case "BOOL": |
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if (!isset($stmt["value"]) || !is_bool($stmt["value"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: Value is not a boolean") |
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); |
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} |
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|
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return $stmt["value"]; |
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case "CONST": |
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if (!isset($stmt["value"]) || !is_string($stmt["value"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: Invalid constant name") |
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); |
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} |
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|
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//For backward compatibility. |
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$name = str_replace('BVFW::', '', $stmt["value"]); |
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if (!in_array($name, self::ALLOWED_EXT_CONSTANTS, true)) { |
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$name = self::CONST_NAME_PREFIX . $name; |
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} |
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|
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if (!defined($name)) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: Undefined constant" . $stmt["value"]) |
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); |
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} |
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|
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return constant($name); |
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case "ARRAY": |
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if (!isset($stmt["value"]) || !is_array($stmt["value"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: Value is not a array") |
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); |
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} |
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|
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$arr = array(); |
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foreach ($stmt["value"] as $element) { |
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$arr[] = $this->getValue($element); |
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} |
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|
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return $arr; |
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case "HASH_MAP": |
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if (!isset($stmt["value"]) || !is_array($stmt["value"])) { |
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throw new MCProtectRuleError( |
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$this->addExState("TypeError: Value is not a hash map") |
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); |
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} |
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|
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$hash_map = array(); |
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foreach($stmt["value"] as $key => $value) { |
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$hash_map[$key] = $this->getValue($value); |
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} |
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|
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return $hash_map; |
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default: |
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return $this->executeStmt($stmt); |
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} |
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} |
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|
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private function executeStmt($stmt) { |
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if (!is_array($stmt) || empty($stmt["type"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("InvalidStatementError: Malformed logic statement") |
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); |
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} |
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|
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$this->pushExStack(); |
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$this->updateCurOp($stmt["type"]); |
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$return_val = null; |
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|
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switch ($stmt["type"]) { |
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case "AND": |
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if (empty($stmt["left_operand"]) || empty($stmt["right_operand"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("InvalidOperandError: Malformed operand(s)") |
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); |
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} |
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|
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$return_val = $this->getValue($stmt["left_operand"]) && $this->getValue($stmt["right_operand"]); |
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break; |
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case "OR": |
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if (empty($stmt["left_operand"]) || empty($stmt["right_operand"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("InvalidOperandError: Malformed operand(s)") |
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); |
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} |
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|
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$return_val = $this->getValue($stmt["left_operand"]) || $this->getValue($stmt["right_operand"]); |
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break; |
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case "NOT": |
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if (empty($stmt["value"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("InvalidOperandError: Malformed operand") |
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); |
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} |
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|
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$return_val = !$this->getValue($stmt["value"]); |
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break; |
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case "FUNCTION": |
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if (empty($stmt["name"]) || !is_string($stmt["name"])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("InvalidFunctionName: Malformed name") |
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); |
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} |
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|
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$name = self::FUNC_NAME_PREFIX . $stmt["name"]; |
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$handler = array($this, $name); |
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|
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if (!is_callable($handler)) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("UndefinedFunctionCall: " . $stmt["name"]) |
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); |
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} |
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|
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if (!array_key_exists('args', $stmt) || !is_array($stmt['args'])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("InvalidArguments: Malformed args") |
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); |
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} |
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|
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$args = array(); |
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foreach ($stmt['args'] as $arg_stmt) { |
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array_push($args, $this->getValue($arg_stmt)); |
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} |
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|
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$return_val = self::toAllowedType(call_user_func_array($handler, $args)); |
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break; |
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default: |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("UnknownOperation: -") |
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); |
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} |
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|
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$this->popExStack(); |
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return $return_val; |
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} |
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|
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private function processRuleFunctionParams($func_name, $args_cnt, $args, $required_params = 0, $param_types = array()) { |
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if (($args_cnt < $required_params)) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("ArgumentCountError: Too few arguments for " . $func_name) |
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); |
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} |
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|
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foreach ($param_types as $pos => $type) { |
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if (!is_int($pos)) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("InvalidParamType: " . $pos) |
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); |
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} |
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|
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switch ($type) { |
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case "string": |
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if (!isset($args[$pos]) || !is_string($args[$pos])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: " . $func_name . " param at " . $pos . " is not a string.") |
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); |
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} |
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break; |
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case 'integer': |
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if (!isset($args[$pos]) || !is_int($args[$pos])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: " . $func_name . " param at " . $pos . " is not a integer.") |
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); |
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} |
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break; |
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case 'double': |
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if (!isset($args[$pos]) || !is_double($args[$pos])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: " . $func_name . " param at " . $pos . " is not a double.") |
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); |
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} |
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break; |
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case 'boolean': |
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if (!isset($args[$pos]) || !is_bool($args[$pos])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: " . $func_name . " param at " . $pos . " is not a boolean.") |
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); |
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} |
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break; |
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case 'array': |
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if (!isset($args[$pos]) || !is_array($args[$pos])) { |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("TypeError: " . $func_name . " param at " . $pos . " is not an array.") |
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); |
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} |
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break; |
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case 'mixed': |
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break; |
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default: |
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throw new WPRProtectRuleError_V636( |
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$this->addExState("InvalidParamTypeError: Invalid type at " . $pos . " for " . $func_name) |
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); |
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} |
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} |
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|
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return $args; |
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} |
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} |
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endif; |
