[SharedArrayBuffer] Prevent SharedArrayBuffer being used in Web APIs

third_party/WebKit/Source/modules/crypto/Crypto.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 32 matching lines @@
          type == DOMArrayBufferView::TypeUint8 ||
          type == DOMArrayBufferView::TypeUint8Clamped ||
          type == DOMArrayBufferView::TypeInt16 ||
          type == DOMArrayBufferView::TypeUint16 ||
          type == DOMArrayBufferView::TypeInt32 ||
          type == DOMArrayBufferView::TypeUint32;
 }
 
 }  // namespace
 
-DOMArrayBufferView* Crypto::getRandomValues(DOMArrayBufferView* array,
-                                            ExceptionState& exceptionState) {
-  ASSERT(array);
-  if (!isIntegerArray(array)) {
+DOMArrayBufferView* Crypto::getRandomValues(
+    const NotShared<DOMArrayBufferView>& array,
+    ExceptionState& exceptionState) {
+  DCHECK(array.view());
+  if (!isIntegerArray(array.view())) {
     exceptionState.throwDOMException(
         TypeMismatchError,
         String::format("The provided ArrayBufferView is of type '%s', which is "
                        "not an integer array type.",
-                       array->typeName()));
+                       array.view()->typeName()));
     return nullptr;
   }
-  if (array->byteLength() > 65536) {
+  if (array.view()->byteLength() > 65536) {
     exceptionState.throwDOMException(
         QuotaExceededError,
         String::format("The ArrayBufferView's byte length (%u) exceeds the "
                        "number of bytes of entropy available via this API "
                        "(65536).",
-                       array->byteLength()));
+                       array.view()->byteLength()));
     return nullptr;
   }
-  cryptographicallyRandomValues(array->baseAddress(), array->byteLength());
-  return array;
+  cryptographicallyRandomValues(array.view()->baseAddress(),
+                                array.view()->byteLength());
+  return array.view();
 }
 
 SubtleCrypto* Crypto::subtle() {
   if (!m_subtleCrypto)
     m_subtleCrypto = SubtleCrypto::create();
   return m_subtleCrypto.get();
 }
 
 DEFINE_TRACE(Crypto) {
   visitor->trace(m_subtleCrypto);
 }
 
 }  // namespace blink