/**
* $GLOBALS["first"]["second"]["third"] =>first[second][third]
* @param Node $node
* @return GLOBALS注册的变量名
*/
public static function getNodeGLOBALSNodeName($node)
{
if (!$node instanceof Node) {
return null;
}
if ($node->var->var) {
$ret = NodeUtils::getNodeStringName($node->dim);
return NodeUtils::getNodeGLOBALSNodeName($node->var) . "[" . $ret . "]";
}
return NodeUtils::getNodeStringName($node->dim);
}
/**
* 处理赋值的assign语句，添加至dataFlows中
* @param AST $node
* @param DataFlow $dataFlow
* @param string $type
*/
public function assignHandler($node, $dataFlow, $type, $block, $fileSummary)
{
$part = null;
if ($type == "left") {
$part = $node->var;
} else {
if ($type == "right") {
$part = $node->expr;
} else {
return;
}
}
//处理$GLOBALS的赋值
//$GLOBAL['name'] = "chongrui" ; 数据流信息为 $name = "chongrui" ;
if ($part && SymbolUtils::isArrayDimFetch($part) && substr(NodeUtils::getNodeStringName($part), 0, 7) == "GLOBALS") {
//加入dataFlow
$arr = new ArrayDimFetchSymbol();
$arr->setValue($part);
if ($type == "left") {
$dataFlow->setLocation($arr);
$dataFlow->setName(NodeUtils::getNodeGLOBALSNodeName($part));
} else {
if ($type == "right") {
$dataFlow->setValue($arr);
}
}
return;
}
//处理赋值语句，存放在DataFlow
//处理赋值语句的左边
if ($part && SymbolUtils::isValue($part)) {
//在DataFlow加入Location以及name
$vs = new ValueSymbol();
$vs->setValueByNode($part);
if ($type == "left") {
$dataFlow->setLocation($vs);
$dataFlow->setName($part->name);
} else {
if ($type == "right") {
$dataFlow->setValue($vs);
}
}
} elseif ($part && SymbolUtils::isVariable($part)) {
//加入dataFlow
$vars = new VariableSymbol();
$vars->setValue($part);
if ($type == "left") {
$dataFlow->setLocation($vars);
$dataFlow->setName($part->name);
} else {
if ($type == "right") {
$dataFlow->setValue($part);
}
}
} elseif ($part && SymbolUtils::isConstant($part)) {
//加入dataFlow
$con = new ConstantSymbol();
$con->setValueByNode($part);
$con->setName($part->name->parts[0]);
if ($type == "left") {
$dataFlow->setLocation($con);
$dataFlow->setName($part->name);
} else {
if ($type == "right") {
$dataFlow->setValue($con);
}
}
} elseif ($part && SymbolUtils::isArrayDimFetch($part)) {
//加入dataFlow
$arr = new ArrayDimFetchSymbol();
$arr->setValue($part);
if ($type == "left") {
$dataFlow->setLocation($arr);
$dataFlow->setName(NodeUtils::getNodeStringName($part));
} else {
if ($type == "right") {
$dataFlow->setValue($arr);
}
}
} elseif ($part && SymbolUtils::isConcat($part)) {
$concat = new ConcatSymbol();
$concat->setItemByNode($part);
if ($type == "left") {
$dataFlow->setLocation($concat);
$dataFlow->setName($part->name);
} else {
if ($type == "right") {
$dataFlow->setValue($concat);
}
}
} else {
//不属于已有的任何一个symbol类型,如函数调用
if ($part && ($part->getType() == "Expr_FuncCall" || $part->getType() == "Expr_MethodCall" || $part->getType() == "Expr_StaticCall")) {
if ($type == "left") {
$dataFlow->setLocation($arr);
$dataFlow->setName(NodeUtils::getNodeStringName($part));
} else {
if ($type == "right") {
//处理净化信息和编码信息
SanitizationHandler::setSanitiInfo($part, $dataFlow, $block, $fileSummary);
EncodingHandler::setEncodeInfo($part, $dataFlow, $block, $fileSummary);
}
}
}
//处理三元表达式
if ($part && $part->getType() == "Expr_Ternary") {
BIFuncUtils::ternaryHandler($type, $part, $dataFlow);
}
}
}
/**
* 检测GLOBALS的定义
* @param Node $node
* @param BasicBlock $block
*/
private function registerGLOBALSHandler($node, $block)
{
$registerItem = new RegisterGlobal();
$varName = NodeUtils::getNodeGLOBALSNodeName($node);
$registerItem->setName($varName);
$registerItem->setIsUrlOverWrite(false);
$block->getBlockSummary()->addRegisterGlobalItem($registerItem);
}
