1 files changed, 127 insertions, 0 deletions
diff --git a/dom/base/Crypto.cpp b/dom/base/Crypto.cpp
new file mode 100644
index 000000000..4de6409ac
--- /dev/null
+++ b/dom/base/Crypto.cpp
@@ -0,0 +1,127 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "Crypto.h"
+#include "jsfriendapi.h"
+#include "nsCOMPtr.h"
+#include "nsIRandomGenerator.h"
+#include "MainThreadUtils.h"
+#include "nsXULAppAPI.h"
+
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/CryptoBinding.h"
+#include "nsServiceManagerUtils.h"
+
+using mozilla::dom::ContentChild;
+
+namespace mozilla {
+namespace dom {
+
+NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Crypto)
+  NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
+  NS_INTERFACE_MAP_ENTRY(nsISupports)
+  NS_INTERFACE_MAP_ENTRY(nsIDOMCrypto)
+NS_INTERFACE_MAP_END
+
+NS_IMPL_CYCLE_COLLECTING_ADDREF(Crypto)
+NS_IMPL_CYCLE_COLLECTING_RELEASE(Crypto)
+
+NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(Crypto, mParent, mSubtle)
+
+Crypto::Crypto()
+{
+  MOZ_COUNT_CTOR(Crypto);
+}
+
+Crypto::~Crypto()
+{
+  MOZ_COUNT_DTOR(Crypto);
+}
+
+void
+Crypto::Init(nsIGlobalObject* aParent)
+{
+  mParent = do_QueryInterface(aParent);
+  MOZ_ASSERT(mParent);
+}
+
+/* virtual */ JSObject*
+Crypto::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
+{
+  return CryptoBinding::Wrap(aCx, this, aGivenProto);
+}
+
+void
+Crypto::GetRandomValues(JSContext* aCx, const ArrayBufferView& aArray,
+                        JS::MutableHandle<JSObject*> aRetval,
+                        ErrorResult& aRv)
+{
+  JS::Rooted<JSObject*> view(aCx, aArray.Obj());
+
+  if (JS_IsTypedArrayObject(view) && JS_GetTypedArraySharedness(view)) {
+    // Throw if the object is mapping shared memory (must opt in).
+    aRv.ThrowTypeError<MSG_TYPEDARRAY_IS_SHARED>(NS_LITERAL_STRING("Argument of Crypto.getRandomValues"));
+    return;
+  }
+
+  // Throw if the wrong type of ArrayBufferView is passed in
+  // (Part of the Web Crypto API spec)
+  switch (JS_GetArrayBufferViewType(view)) {
+    case js::Scalar::Int8:
+    case js::Scalar::Uint8:
+    case js::Scalar::Uint8Clamped:
+    case js::Scalar::Int16:
+    case js::Scalar::Uint16:
+    case js::Scalar::Int32:
+    case js::Scalar::Uint32:
+      break;
+    default:
+      aRv.Throw(NS_ERROR_DOM_TYPE_MISMATCH_ERR);
+      return;
+  }
+
+  aArray.ComputeLengthAndData();
+  uint32_t dataLen = aArray.Length();
+  if (dataLen == 0) {
+    NS_WARNING("ArrayBufferView length is 0, cannot continue");
+    aRetval.set(view);
+    return;
+  } else if (dataLen > 65536) {
+    aRv.Throw(NS_ERROR_DOM_QUOTA_EXCEEDED_ERR);
+    return;
+  }
+
+  nsCOMPtr<nsIRandomGenerator> randomGenerator =
+    do_GetService("@mozilla.org/security/random-generator;1");
+  if (!randomGenerator) {
+    aRv.Throw(NS_ERROR_DOM_OPERATION_ERR);
+    return;
+  }
+
+  uint8_t* buf;
+  nsresult rv = randomGenerator->GenerateRandomBytes(dataLen, &buf);
+  if (NS_FAILED(rv) || !buf) {
+    aRv.Throw(NS_ERROR_DOM_OPERATION_ERR);
+    return;
+  }
+
+  // Copy random bytes to ABV.
+  memcpy(aArray.Data(), buf, dataLen);
+  free(buf);
+
+  aRetval.set(view);
+}
+
+SubtleCrypto*
+Crypto::Subtle()
+{
+  if(!mSubtle) {
+    mSubtle = new SubtleCrypto(GetParentObject());
+  }
+  return mSubtle;
+}
+
+} // namespace dom
+} // namespace mozilla