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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "third_party/blink/renderer/modules/fuzzing/internals_fuzzing.h"
#include "third_party/blink/public/platform/platform.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/bindings/core/v8/v8_union_arraybuffer_arraybufferview.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/platform/testing/renderer_fuzzing_support.h"
#include "third_party/blink/renderer/platform/wtf/casting.h"
namespace blink {
static void ResolvePromise(ScriptPromiseResolver<IDLUndefined>* resolver) {
resolver->Resolve();
}
// static
ScriptPromise<IDLUndefined> InternalsFuzzing::runFuzzer(
ScriptState* script_state,
Internals&,
const String& fuzzer_id,
V8BufferSource* fuzzer_data) {
auto* context = ExecutionContext::From(script_state);
const uint8_t* bytes = nullptr;
size_t num_bytes = 0;
switch (fuzzer_data->GetContentType()) {
case V8BufferSource::ContentType::kArrayBuffer: {
DOMArrayBuffer* array = fuzzer_data->GetAsArrayBuffer();
bytes = static_cast<uint8_t*>(array->Data());
num_bytes = array->ByteLength();
break;
}
case V8BufferSource::ContentType::kArrayBufferView: {
const auto& view = fuzzer_data->GetAsArrayBufferView();
bytes = static_cast<uint8_t*>(view->BaseAddress());
num_bytes = view->byteLength();
break;
}
}
std::vector<uint8_t> data(bytes, bytes + num_bytes);
auto* resolver =
MakeGarbageCollected<ScriptPromiseResolver<IDLUndefined>>(script_state);
auto promise = resolver->Promise();
AssociatedInterfaceProvider* associated_provider = nullptr;
if (auto* window = DynamicTo<LocalDOMWindow>(context)) {
if (auto* frame = window->GetFrame()) {
associated_provider = frame->GetRemoteNavigationAssociatedInterfaces();
}
}
RendererFuzzingSupport::Run(
&context->GetBrowserInterfaceBroker(),
Platform::Current()->GetBrowserInterfaceBroker(), associated_provider,
fuzzer_id.Utf8(), std::move(data),
WTF::BindOnce(&ResolvePromise, WrapPersistent(resolver)));
return promise;
}
} // namespace blink
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