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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.
#include "third_party/blink/renderer/extensions/webview/web_view_android.h"
#include "base/task/single_thread_task_runner.h"
#include "third_party/blink/public/mojom/webview/webview_media_integrity.mojom-blink.h"
#include "third_party/blink/renderer/bindings/core/v8/script_promise_resolver.h"
#include "third_party/blink/renderer/bindings/extensions_webview/v8/v8_get_media_integrity_token_provider_params.h"
#include "third_party/blink/renderer/core/execution_context/execution_context.h"
#include "third_party/blink/renderer/core/execution_context/execution_context_lifecycle_observer.h"
#include "third_party/blink/renderer/core/frame/local_dom_window.h"
#include "third_party/blink/renderer/extensions/webview/media_integrity/media_integrity_error.h"
#include "third_party/blink/renderer/extensions/webview/media_integrity/media_integrity_token_provider.h"
#include "third_party/blink/renderer/platform/heap/garbage_collected.h"
#include "third_party/blink/renderer/platform/heap/persistent.h"
#include "third_party/blink/renderer/platform/mojo/heap_mojo_remote.h"
#include "third_party/blink/renderer/platform/supplementable.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace {
const char kInvalidContext[] = "Invalid context";
} // namespace
namespace blink {
const char WebViewAndroid::kSupplementName[] = "WebView";
WebViewAndroid& WebViewAndroid::From(ExecutionContext& execution_context) {
CHECK(!execution_context.IsContextDestroyed());
auto* supplement =
Supplement<ExecutionContext>::From<WebViewAndroid>(execution_context);
if (!supplement) {
supplement = MakeGarbageCollected<WebViewAndroid>(execution_context);
ProvideTo(execution_context, supplement);
}
return *supplement;
}
WebViewAndroid::WebViewAndroid(ExecutionContext& execution_context)
: Supplement<ExecutionContext>(execution_context),
ExecutionContextClient(&execution_context),
media_integrity_service_remote_(&execution_context) {}
void WebViewAndroid::EnsureServiceConnection(
ExecutionContext* execution_context) {
if (media_integrity_service_remote_.is_bound()) {
return;
}
scoped_refptr<base::SingleThreadTaskRunner> task_runner =
execution_context->GetTaskRunner(TaskType::kInternalDefault);
execution_context->GetBrowserInterfaceBroker().GetInterface(
media_integrity_service_remote_.BindNewPipeAndPassReceiver(task_runner));
media_integrity_service_remote_.set_disconnect_handler(WTF::BindOnce(
&WebViewAndroid::OnServiceConnectionError, WrapWeakPersistent(this)));
}
void WebViewAndroid::OnServiceConnectionError() {
media_integrity_service_remote_.reset();
for (auto& resolver : provider_resolvers_) {
ScriptState* script_state = resolver->GetScriptState();
if (!script_state->ContextIsValid()) {
continue;
}
ScriptState::Scope scope(script_state);
resolver->Reject(MediaIntegrityError::CreateForName(
script_state->GetIsolate(),
V8MediaIntegrityErrorName::Enum::kInternalError));
}
provider_resolvers_.clear();
}
ScriptPromise<MediaIntegrityTokenProvider>
WebViewAndroid::getExperimentalMediaIntegrityTokenProvider(
ScriptState* script_state,
GetMediaIntegrityTokenProviderParams* params,
ExceptionState& exception_state) {
if (!script_state->ContextIsValid()) {
exception_state.ThrowDOMException(DOMExceptionCode::kInvalidStateError,
kInvalidContext);
return EmptyPromise();
}
ScriptState::Scope scope(script_state);
ExecutionContext* execution_context = ExecutionContext::From(script_state);
const SecurityOrigin* origin = execution_context->GetSecurityOrigin();
if ((origin->Protocol() != url::kHttpScheme &&
origin->Protocol() != url::kHttpsScheme) ||
!origin->IsPotentiallyTrustworthy()) {
exception_state.ThrowDOMException(
DOMExceptionCode::kNotSupportedError,
"getExperimentalMediaIntegrityTokenProvider: "
"can only be used from trustworthy http/https origins");
return EmptyPromise();
}
ScriptPromiseResolver<MediaIntegrityTokenProvider>* resolver =
MakeGarbageCollected<ScriptPromiseResolver<MediaIntegrityTokenProvider>>(
script_state, exception_state.GetContext());
ScriptPromise<MediaIntegrityTokenProvider> promise = resolver->Promise();
if (!params->hasCloudProjectNumber()) {
resolver->Reject(MediaIntegrityError::CreateForName(
script_state->GetIsolate(),
V8MediaIntegrityErrorName::Enum::kInvalidArgument));
return promise;
}
const uint64_t cloud_project_number = params->cloudProjectNumber();
// This is checked in the browser also, but the browser will consider it a bad
// message (and has the right to ignore or kill the renderer). We want to
// report an error to the script instead.
if (cloud_project_number >
mojom::blink::WebViewMediaIntegrityService::kMaxCloudProjectNumber) {
resolver->Reject(MediaIntegrityError::CreateForName(
script_state->GetIsolate(),
V8MediaIntegrityErrorName::Enum::kInvalidArgument));
return promise;
}
EnsureServiceConnection(execution_context);
scoped_refptr<base::SingleThreadTaskRunner> task_runner =
execution_context->GetTaskRunner(TaskType::kInternalDefault);
mojo::PendingRemote<mojom::blink::WebViewMediaIntegrityProvider>
provider_pending_remote;
mojo::PendingReceiver<mojom::blink::WebViewMediaIntegrityProvider>
provider_pending_receiver =
provider_pending_remote.InitWithNewPipeAndPassReceiver();
provider_resolvers_.insert(resolver);
media_integrity_service_remote_->GetIntegrityProvider(
std::move(provider_pending_receiver), cloud_project_number,
WTF::BindOnce(&WebViewAndroid::OnGetIntegrityProviderResponse,
WrapPersistent(this), WrapPersistent(script_state),
std::move(provider_pending_remote), cloud_project_number,
WrapPersistent(resolver)));
return promise;
}
void WebViewAndroid::OnGetIntegrityProviderResponse(
ScriptState* script_state,
mojo::PendingRemote<mojom::blink::WebViewMediaIntegrityProvider>
provider_pending_remote,
const uint64_t cloud_project_number,
ScriptPromiseResolver<MediaIntegrityTokenProvider>* resolver,
const std::optional<mojom::blink::WebViewMediaIntegrityErrorCode> error) {
provider_resolvers_.erase(resolver);
if (!script_state->ContextIsValid()) {
resolver->Reject(MakeGarbageCollected<DOMException>(
DOMExceptionCode::kInvalidStateError, kInvalidContext));
return;
}
ScriptState::Scope scope(script_state);
if (error.has_value()) {
resolver->Reject(MediaIntegrityError::CreateFromMojomEnum(
script_state->GetIsolate(), *error));
return;
}
MediaIntegrityTokenProvider* provider =
MakeGarbageCollected<MediaIntegrityTokenProvider>(
ExecutionContext::From(script_state),
std::move(provider_pending_remote), cloud_project_number);
resolver->Resolve(provider);
}
void WebViewAndroid::Trace(Visitor* visitor) const {
visitor->Trace(provider_resolvers_);
visitor->Trace(media_integrity_service_remote_);
Supplement<ExecutionContext>::Trace(visitor);
ExecutionContextClient::Trace(visitor);
ScriptWrappable::Trace(visitor);
}
} // namespace blink
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