Check if PHPSandbox instance has $name function defined
| public isDefinedFunc ( string $name ) : boolean | ||
| $name | string | String of function $name to query |
| return | boolean | Returns true if PHPSandbox instance has defined function, false otherwise |
/** Examine the current PhpParser\Node node against the PHPSandbox configuration for whitelisting sandboxed code
*
* @param Node $node The sandboxed $node to examine
*
* @return null
*/
public function leaveNode(Node $node)
{
if ($node instanceof Node\Stmt\Class_ && is_string($node->name) && $this->sandbox->allow_classes && $this->sandbox->auto_whitelist_classes && !$this->sandbox->hasBlacklistedClasses()) {
$this->sandbox->whitelistClass($node->name);
$this->sandbox->whitelistType($node->name);
} else {
if ($node instanceof Node\Stmt\Interface_ && is_string($node->name) && $this->sandbox->allow_interfaces && $this->sandbox->auto_whitelist_interfaces && !$this->sandbox->hasBlacklistedInterfaces()) {
$this->sandbox->whitelistInterface($node->name);
} else {
if ($node instanceof Node\Stmt\Trait_ && is_string($node->name) && $this->sandbox->allow_traits && $this->sandbox->auto_whitelist_traits && !$this->sandbox->hasBlacklistedTraits()) {
$this->sandbox->whitelistTrait($node->name);
} else {
if ($node instanceof Node\Expr\FuncCall && $node->name instanceof Node\Name && $node->name->toString() == 'define' && $this->sandbox->allow_constants && $this->sandbox->auto_whitelist_constants && !$this->sandbox->isDefinedFunc('define') && !$this->sandbox->hasBlacklistedConsts()) {
$name = isset($node->args[0]) ? $node->args[0] : null;
if ($name && $name instanceof Node\Arg && $name->value instanceof Node\Scalar\String_ && is_string($name->value->value) && $name->value->value) {
$this->sandbox->whitelistConst($name->value->value);
}
} else {
if ($node instanceof Node\Stmt\Global_ && $this->sandbox->allow_globals && $this->sandbox->auto_whitelist_globals && $this->sandbox->hasWhitelistedVars()) {
foreach ($node->vars as $var) {
/**
* @var Node\Expr\Variable $var
*/
if ($var instanceof Node\Expr\Variable) {
$this->sandbox->whitelistVar($var->name);
}
}
} else {
if ($node instanceof Node\Stmt\Function_ && is_string($node->name) && $node->name && $this->sandbox->allow_functions && $this->sandbox->auto_whitelist_functions && !$this->sandbox->hasBlacklistedFuncs()) {
$this->sandbox->whitelistFunc($node->name);
}
}
}
}
}
}
}
/** Examine the current PhpParser_Node node against the PHPSandbox configuration for validating sandboxed code
*
* @param Node $node The sandboxed $node to validate
*
* @throws Error Throws an exception if validation fails
*
* @return Node|bool|null Return rewritten node, false if node must be removed, or null if no changes to the node are made
*/
public function leaveNode(Node $node)
{
if ($node instanceof Node\Arg) {
return new Node\Expr\FuncCall(new Node\Name\FullyQualified($node->value instanceof Node\Expr\Variable ? 'PHPSandbox\\wrapByRef' : 'PHPSandbox\\wrap'), [$node, new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)])], $node->getAttributes());
} else {
if ($node instanceof Node\Stmt\InlineHTML) {
if (!$this->sandbox->allow_escaping) {
$this->sandbox->validationError("Sandboxed code attempted to escape to HTML!", Error::ESCAPE_ERROR, $node);
}
} else {
if ($node instanceof Node\Expr\Cast) {
if (!$this->sandbox->allow_casting) {
$this->sandbox->validationError("Sandboxed code attempted to cast!", Error::CAST_ERROR, $node);
}
if ($node instanceof Node\Expr\Cast\Int_) {
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_intval', [new Node\Arg($node->expr)], $node->getAttributes());
} else {
if ($node instanceof Node\Expr\Cast\Double) {
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_floatval', [new Node\Arg($node->expr)], $node->getAttributes());
} else {
if ($node instanceof Node\Expr\Cast\Bool_) {
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_boolval', [new Node\Arg($node->expr)], $node->getAttributes());
} else {
if ($node instanceof Node\Expr\Cast\Array_) {
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_arrayval', [new Node\Arg($node->expr)], $node->getAttributes());
} else {
if ($node instanceof Node\Expr\Cast\Object_) {
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_objectval', [new Node\Arg($node->expr)], $node->getAttributes());
}
}
}
}
}
} else {
if ($node instanceof Node\Expr\FuncCall) {
if ($node->name instanceof Node\Name) {
$name = strtolower($node->name->toString());
if (!$this->sandbox->checkFunc($name)) {
$this->sandbox->validationError("Function failed custom validation!", Error::VALID_FUNC_ERROR, $node);
}
if ($this->sandbox->isDefinedFunc($name)) {
$args = $node->args;
array_unshift($args, new Node\Arg(new Node\Scalar\String_($name)));
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), 'call_func', $args, $node->getAttributes());
}
if ($this->sandbox->overwrite_defined_funcs && in_array($name, PHPSandbox::$defined_funcs)) {
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_' . $name, [new Node\Arg(new Node\Expr\FuncCall(new Node\Name([$name])))], $node->getAttributes());
}
if ($this->sandbox->overwrite_sandboxed_string_funcs && in_array($name, PHPSandbox::$sandboxed_string_funcs)) {
$args = $node->args;
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_' . $name, $args, $node->getAttributes());
}
if ($this->sandbox->overwrite_func_get_args && in_array($name, PHPSandbox::$arg_funcs)) {
if ($name == 'func_get_arg') {
$index = new Node\Arg(new Node\Scalar\LNumber(0));
if (isset($node->args[0]) && $node->args[0] instanceof Node\Arg) {
$index = $node->args[0];
}
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_' . $name, [new Node\Arg(new Node\Expr\FuncCall(new Node\Name(['func_get_args']))), $index], $node->getAttributes());
}
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_' . $name, [new Node\Arg(new Node\Expr\FuncCall(new Node\Name(['func_get_args'])))], $node->getAttributes());
}
} else {
return new Node\Expr\Ternary(new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), 'check_func', [new Node\Arg($node->name)], $node->getAttributes()), $node, new Node\Expr\ConstFetch(new Node\Name('null')));
}
} else {
if ($node instanceof Node\Stmt\Function_) {
if (!$this->sandbox->allow_functions) {
$this->sandbox->validationError("Sandboxed code attempted to define function!", Error::DEFINE_FUNC_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('function')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'function');
}
if (!$node->name) {
$this->sandbox->validationError("Sandboxed code attempted to define unnamed function!", Error::DEFINE_FUNC_ERROR, $node, '');
}
if ($this->sandbox->isDefinedFunc($node->name)) {
$this->sandbox->validationError("Sandboxed code attempted to redefine function!", Error::DEFINE_FUNC_ERROR, $node, $node->name);
}
if ($node->byRef && !$this->sandbox->allow_references) {
$this->sandbox->validationError("Sandboxed code attempted to define function return by reference!", Error::BYREF_ERROR, $node);
}
} else {
if ($node instanceof Node\Expr\Closure) {
if (!$this->sandbox->allow_closures) {
$this->sandbox->validationError("Sandboxed code attempted to create a closure!", Error::CLOSURE_ERROR, $node);
}
} else {
if ($node instanceof Node\Stmt\Class_) {
if (!$this->sandbox->allow_classes) {
$this->sandbox->validationError("Sandboxed code attempted to define class!", Error::DEFINE_CLASS_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('class')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'class');
}
if (!$node->name) {
$this->sandbox->validationError("Sandboxed code attempted to define unnamed class!", Error::DEFINE_CLASS_ERROR, $node, '');
}
if (!$this->sandbox->checkClass($node->name)) {
$this->sandbox->validationError("Class failed custom validation!", Error::VALID_CLASS_ERROR, $node, $node->name);
}
if ($node->extends instanceof Node\Name) {
if (!$this->sandbox->checkKeyword('extends')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'extends');
}
if (!$node->extends->toString()) {
$this->sandbox->validationError("Sandboxed code attempted to extend unnamed class!", Error::DEFINE_CLASS_ERROR, $node, '');
}
if (!$this->sandbox->checkClass($node->extends->toString(), true)) {
$this->sandbox->validationError("Class extension failed custom validation!", Error::VALID_CLASS_ERROR, $node, $node->extends->toString());
}
}
if (is_array($node->implements)) {
if (!$this->sandbox->checkKeyword('implements')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'implements');
}
foreach ($node->implements as $implement) {
/**
* @var Node\Name $implement
*/
if (!$implement->toString()) {
$this->sandbox->validationError("Sandboxed code attempted to implement unnamed interface!", Error::DEFINE_INTERFACE_ERROR, $node, '');
}
if (!$this->sandbox->checkInterface($implement->toString())) {
$this->sandbox->validationError("Interface failed custom validation!", Error::VALID_INTERFACE_ERROR, $node, $implement->toString());
}
}
}
} else {
if ($node instanceof Node\Stmt\Interface_) {
if (!$this->sandbox->allow_interfaces) {
$this->sandbox->validationError("Sandboxed code attempted to define interface!", Error::DEFINE_INTERFACE_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('interface')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'interface');
}
if (!$node->name) {
$this->sandbox->validationError("Sandboxed code attempted to define unnamed interface!", Error::DEFINE_INTERFACE_ERROR, $node, '');
}
if (!$this->sandbox->checkInterface($node->name)) {
$this->sandbox->validationError("Interface failed custom validation!", Error::VALID_INTERFACE_ERROR, $node, $node->name);
}
} else {
if ($node instanceof Node\Stmt\Trait_) {
if (!$this->sandbox->allow_traits) {
$this->sandbox->validationError("Sandboxed code attempted to define trait!", Error::DEFINE_TRAIT_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('trait')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'trait');
}
if (!$node->name) {
$this->sandbox->validationError("Sandboxed code attempted to define unnamed trait!", Error::DEFINE_TRAIT_ERROR, $node, '');
}
if (!$this->sandbox->checkTrait($node->name)) {
$this->sandbox->validationError("Trait failed custom validation!", Error::VALID_TRAIT_ERROR, $node, $node->name);
}
} else {
if ($node instanceof Node\Stmt\TraitUse) {
if (!$this->sandbox->checkKeyword('use')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'use');
}
if (is_array($node->traits)) {
foreach ($node->traits as $trait) {
/**
* @var Node\Name $trait
*/
if (!$trait->toString()) {
$this->sandbox->validationError("Sandboxed code attempted to use unnamed trait!", Error::DEFINE_TRAIT_ERROR, $node, '');
}
if (!$this->sandbox->checkTrait($trait->toString())) {
$this->sandbox->validationError("Trait failed custom validation!", Error::VALID_TRAIT_ERROR, $node, $trait->toString());
}
}
}
} else {
if ($node instanceof Node\Expr\Yield_) {
if (!$this->sandbox->allow_generators) {
$this->sandbox->validationError("Sandboxed code attempted to create a generator!", Error::GENERATOR_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('yield')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'yield');
}
} else {
if ($node instanceof Node\Stmt\Global_) {
if (!$this->sandbox->allow_globals) {
$this->sandbox->validationError("Sandboxed code attempted to use global keyword!", Error::GLOBALS_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('global')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'global');
}
foreach ($node->vars as $var) {
/**
* @var Node\Expr\Variable $var
*/
if ($var instanceof Node\Expr\Variable) {
if (!$this->sandbox->checkGlobal($var->name)) {
$this->sandbox->validationError("Global failed custom validation!", Error::VALID_GLOBAL_ERROR, $node, $var->name);
}
} else {
$this->sandbox->validationError("Sandboxed code attempted to pass non-variable to global keyword!", Error::DEFINE_GLOBAL_ERROR, $node);
}
}
} else {
if ($node instanceof Node\Expr\Variable) {
if (!is_string($node->name)) {
$this->sandbox->validationError("Sandboxed code attempted dynamically-named variable call!", Error::DYNAMIC_VAR_ERROR, $node);
}
if ($node->name == $this->sandbox->name) {
$this->sandbox->validationError("Sandboxed code attempted to access the PHPSandbox instance!", Error::SANDBOX_ACCESS_ERROR, $node);
}
if (in_array($node->name, PHPSandbox::$superglobals)) {
if (!$this->sandbox->checkSuperglobal($node->name)) {
$this->sandbox->validationError("Superglobal failed custom validation!", Error::VALID_SUPERGLOBAL_ERROR, $node, $node->name);
}
if ($this->sandbox->overwrite_superglobals) {
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_get_superglobal', [new Node\Arg(new Node\Scalar\String_($node->name))], $node->getAttributes());
}
} else {
if (!$this->sandbox->checkVar($node->name)) {
$this->sandbox->validationError("Variable failed custom validation!", Error::VALID_VAR_ERROR, $node, $node->name);
}
}
} else {
if ($node instanceof Node\Stmt\StaticVar) {
if (!$this->sandbox->allow_static_variables) {
$this->sandbox->validationError("Sandboxed code attempted to create static variable!", Error::STATIC_VAR_ERROR, $node);
}
if (!is_string($node->name)) {
$this->sandbox->validationError("Sandboxed code attempted dynamically-named static variable call!", Error::DYNAMIC_STATIC_VAR_ERROR, $node);
}
if (!$this->sandbox->checkVar($node->name)) {
$this->sandbox->validationError("Variable failed custom validation!", Error::VALID_VAR_ERROR, $node, $node->name);
}
if ($node->default instanceof Node\Expr\New_) {
$node->default = $node->default->args[0];
}
} else {
if ($node instanceof Node\Stmt\Const_) {
$this->sandbox->validationError("Sandboxed code cannot use const keyword in the global scope!", Error::GLOBAL_CONST_ERROR, $node);
} else {
if ($node instanceof Node\Expr\ConstFetch) {
if (!$node->name instanceof Node\Name) {
$this->sandbox->validationError("Sandboxed code attempted dynamically-named constant call!", Error::DYNAMIC_CONST_ERROR, $node);
}
if (!$this->sandbox->checkConst($node->name->toString())) {
$this->sandbox->validationError("Constant failed custom validation!", Error::VALID_CONST_ERROR, $node, $node->name->toString());
}
} else {
if ($node instanceof Node\Expr\ClassConstFetch || $node instanceof Node\Expr\StaticCall || $node instanceof Node\Expr\StaticPropertyFetch) {
$class = $node->class;
if (!$class instanceof Node\Name) {
$this->sandbox->validationError("Sandboxed code attempted dynamically-named class call!", Error::DYNAMIC_CLASS_ERROR, $node);
}
if ($this->sandbox->isDefinedClass($class)) {
$node->class = new Node\Name($this->sandbox->getDefinedClass($class));
}
/**
* @var Node\Name $class
*/
if (!$this->sandbox->checkClass($class->toString())) {
$this->sandbox->validationError("Class constant failed custom validation!", Error::VALID_CLASS_ERROR, $node, $class->toString());
}
return $node;
} else {
if ($node instanceof Node\Param && $node->type instanceof Node\Name) {
$class = $node->type->toString();
if ($this->sandbox->isDefinedClass($class)) {
$node->type = new Node\Name($this->sandbox->getDefinedClass($class));
}
return $node;
} else {
if ($node instanceof Node\Expr\New_) {
if (!$this->sandbox->allow_objects) {
$this->sandbox->validationError("Sandboxed code attempted to create object!", Error::CREATE_OBJECT_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('new')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'new');
}
if (!$node->class instanceof Node\Name) {
$this->sandbox->validationError("Sandboxed code attempted dynamically-named class call!", Error::DYNAMIC_CLASS_ERROR, $node);
}
$class = $node->class->toString();
if ($this->sandbox->isDefinedClass($class)) {
$node->class = new Node\Name($this->sandbox->getDefinedClass($class));
}
$this->sandbox->checkType($class);
return $node;
} else {
if ($node instanceof Node\Expr\ErrorSuppress) {
if (!$this->sandbox->allow_error_suppressing) {
$this->sandbox->validationError("Sandboxed code attempted to suppress error!", Error::ERROR_SUPPRESS_ERROR, $node);
}
} else {
if ($node instanceof Node\Expr\AssignRef) {
if (!$this->sandbox->allow_references) {
$this->sandbox->validationError("Sandboxed code attempted to assign by reference!", Error::BYREF_ERROR, $node);
}
} else {
if ($node instanceof Node\Stmt\HaltCompiler) {
if (!$this->sandbox->allow_halting) {
$this->sandbox->validationError("Sandboxed code attempted to halt compiler!", Error::HALT_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('halt')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'halt');
}
} else {
if ($node instanceof Node\Stmt\Namespace_) {
if (!$this->sandbox->allow_namespaces) {
$this->sandbox->validationError("Sandboxed code attempted to define namespace!", Error::DEFINE_NAMESPACE_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('namespace')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'namespace');
}
if ($node->name instanceof Node\Name) {
$namespace = $node->name->toString();
$this->sandbox->checkNamespace($namespace);
if (!$this->sandbox->isDefinedNamespace($namespace)) {
$this->sandbox->defineNamespace($namespace);
}
} else {
$this->sandbox->validationError("Sandboxed code attempted use invalid namespace!", Error::DEFINE_NAMESPACE_ERROR, $node);
}
return $node->stmts;
} else {
if ($node instanceof Node\Stmt\Use_) {
if (!$this->sandbox->allow_aliases) {
$this->sandbox->validationError("Sandboxed code attempted to use namespace and/or alias!", Error::DEFINE_ALIAS_ERROR, $node);
}
if (!$this->sandbox->checkKeyword('use')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'use');
}
foreach ($node->uses as $use) {
/**
* @var Node\Stmt\UseUse $use
*/
if ($use instanceof Node\Stmt\UseUse && $use->name instanceof Node\Name && (is_string($use->alias) || is_null($use->alias))) {
$this->sandbox->checkAlias($use->name->toString());
if ($use->alias) {
if (!$this->sandbox->checkKeyword('as')) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, 'as');
}
}
$this->sandbox->defineAlias($use->name->toString(), $use->alias);
} else {
$this->sandbox->validationError("Sandboxed code attempted use invalid namespace or alias!", Error::DEFINE_ALIAS_ERROR, $node);
}
}
return false;
} else {
if ($node instanceof Node\Expr\ShellExec) {
if ($this->sandbox->isDefinedFunc('shell_exec')) {
$args = [new Node\Arg(new Node\Scalar\String_('shell_exec')), new Node\Arg(new Node\Scalar\String_(implode('', $node->parts)))];
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), 'call_func', $args, $node->getAttributes());
}
if ($this->sandbox->hasWhitelistedFuncs()) {
if (!$this->sandbox->isWhitelistedFunc('shell_exec')) {
$this->sandbox->validationError("Sandboxed code attempted to use shell execution backticks when the shell_exec function is not whitelisted!", Error::BACKTICKS_ERROR, $node);
}
} else {
if ($this->sandbox->hasBlacklistedFuncs() && $this->sandbox->isBlacklistedFunc('shell_exec')) {
$this->sandbox->validationError("Sandboxed code attempted to use shell execution backticks when the shell_exec function is blacklisted!", Error::BACKTICKS_ERROR, $node);
}
}
if (!$this->sandbox->allow_backticks) {
$this->sandbox->validationError("Sandboxed code attempted to use shell execution backticks!", Error::BACKTICKS_ERROR, $node);
}
} else {
if ($name = $this->isMagicConst($node)) {
if (!$this->sandbox->checkMagicConst($name)) {
$this->sandbox->validationError("Magic constant failed custom validation!", Error::VALID_MAGIC_CONST_ERROR, $node, $name);
}
if ($this->sandbox->isDefinedMagicConst($name)) {
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_get_magic_const', [new Node\Arg(new Node\Scalar\String_($name))], $node->getAttributes());
}
} else {
if ($name = $this->isKeyword($node)) {
if (!$this->sandbox->checkKeyword($name)) {
$this->sandbox->validationError("Keyword failed custom validation!", Error::VALID_KEYWORD_ERROR, $node, $name);
}
if ($node instanceof Node\Expr\Include_ && !$this->sandbox->allow_includes) {
$this->sandbox->validationError("Sandboxed code attempted to include files!", Error::INCLUDE_ERROR, $node, $name);
} else {
if ($node instanceof Node\Expr\Include_ && ($node->type == Node\Expr\Include_::TYPE_INCLUDE && $this->sandbox->isDefinedFunc('include') || $node->type == Node\Expr\Include_::TYPE_INCLUDE_ONCE && $this->sandbox->isDefinedFunc('include_once') || $node->type == Node\Expr\Include_::TYPE_REQUIRE && $this->sandbox->isDefinedFunc('require') || $node->type == Node\Expr\Include_::TYPE_REQUIRE_ONCE && $this->sandbox->isDefinedFunc('require_once'))) {
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), 'call_func', [new Node\Arg(new Node\Scalar\String_($name)), new Node\Arg($node->expr)], $node->getAttributes());
} else {
if ($node instanceof Node\Expr\Include_ && $this->sandbox->sandbox_includes) {
switch ($node->type) {
case Node\Expr\Include_::TYPE_INCLUDE_ONCE:
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_include_once', [new Node\Arg($node->expr)], $node->getAttributes());
break;
case Node\Expr\Include_::TYPE_REQUIRE:
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_require', [new Node\Arg($node->expr)], $node->getAttributes());
break;
case Node\Expr\Include_::TYPE_REQUIRE_ONCE:
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_require_once', [new Node\Arg($node->expr)], $node->getAttributes());
break;
case Node\Expr\Include_::TYPE_INCLUDE:
default:
return new Node\Expr\MethodCall(new Node\Expr\StaticCall(new Node\Name\FullyQualified("PHPSandbox\\PHPSandbox"), 'getSandbox', [new Node\Scalar\String_($this->sandbox->name)]), '_include', [new Node\Arg($node->expr)], $node->getAttributes());
break;
}
}
}
}
} else {
if ($name = $this->isOperator($node)) {
if (!$this->sandbox->checkOperator($name)) {
$this->sandbox->validationError("Operator failed custom validation!", Error::VALID_OPERATOR_ERROR, $node, $name);
}
} else {
if ($name = $this->isPrimitive($node)) {
if (!$this->sandbox->checkPrimitive($name)) {
$this->sandbox->validationError("Primitive failed custom validation!", Error::VALID_PRIMITIVE_ERROR, $node, $name);
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
}
return null;
}
/** Examine the current PhpParser_Node node against the PHPSandbox configuration for whitelisting trusted code
*
* @param \PhpParser\Node $node The trusted $node to examine
*
* @return null|bool Return false if node must be removed, or null if no changes to the node are made
*/
public function leaveNode(Node $node)
{
if ($node instanceof Node\Expr\FuncCall && $node->name instanceof Node\Name && !$this->sandbox->hasBlacklistedFuncs()) {
$this->sandbox->whitelistFunc($node->name->toString());
} else {
if ($node instanceof Node\Stmt\Function_ && is_string($node->name) && $node->name && !$this->sandbox->hasBlacklistedFuncs()) {
$this->sandbox->whitelistFunc($node->name);
} else {
if (($node instanceof Node\Expr\Variable || $node instanceof Node\Stmt\StaticVar) && is_string($node->name) && $this->sandbox->hasWhitelistedVars() && !$this->sandbox->allow_variables) {
$this->sandbox->whitelistVar($node->name);
} else {
if ($node instanceof Node\Expr\FuncCall && $node->name instanceof Node\Name && $node->name->toString() == 'define' && !$this->sandbox->isDefinedFunc('define') && !$this->sandbox->hasBlacklistedConsts()) {
$name = isset($node->args[0]) ? $node->args[0] : null;
if ($name && $name instanceof Node\Arg && $name->value instanceof Node\Scalar\String_ && is_string($name->value->value) && $name->value->value) {
$this->sandbox->whitelistConst($name->value->value);
}
} else {
if ($node instanceof Node\Expr\ConstFetch && $node->name instanceof Node\Name && !$this->sandbox->hasBlacklistedConsts()) {
$this->sandbox->whitelistConst($node->name->toString());
} else {
if ($node instanceof Node\Stmt\Class_ && is_string($node->name) && !$this->sandbox->hasBlacklistedClasses()) {
$this->sandbox->whitelistClass($node->name);
} else {
if ($node instanceof Node\Stmt\Interface_ && is_string($node->name) && !$this->sandbox->hasBlacklistedInterfaces()) {
$this->sandbox->whitelistInterface($node->name);
} else {
if ($node instanceof Node\Stmt\Trait_ && is_string($node->name) && !$this->sandbox->hasBlacklistedTraits()) {
$this->sandbox->whitelistTrait($node->name);
} else {
if ($node instanceof Node\Expr\New_ && $node->class instanceof Node\Name && !$this->sandbox->hasBlacklistedTypes()) {
$this->sandbox->whitelistType($node->class->toString());
} else {
if ($node instanceof Node\Stmt\Global_ && $this->sandbox->hasWhitelistedVars()) {
foreach ($node->vars as $var) {
/**
* @var Node\Expr\Variable $var
*/
if ($var instanceof Node\Expr\Variable) {
$this->sandbox->whitelistVar($var->name);
}
}
} else {
if ($node instanceof Node\Stmt\Namespace_) {
if ($node->name instanceof Node\Name) {
$name = $node->name->toString();
$this->sandbox->checkNamespace($name);
if (!$this->sandbox->isDefinedNamespace($name)) {
$this->sandbox->defineNamespace($name);
}
}
return false;
} else {
if ($node instanceof Node\Stmt\Use_) {
foreach ($node->uses as $use) {
/**
* @var Node\Stmt\UseUse $use
*/
if ($use instanceof Node\Stmt\UseUse && $use->name instanceof Node\Name && (is_string($use->alias) || is_null($use->alias))) {
$name = $use->name->toString();
$this->sandbox->checkAlias($name);
if (!$this->sandbox->isDefinedAlias($name)) {
$this->sandbox->defineAlias($name, $use->alias);
}
}
}
return false;
}
}
}
}
}
}
}
}
}
}
}
}
return null;
}