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// Copyright 2022 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/modules/smart_card/smart_card_resource_manager.h"
#include "services/device/public/mojom/smart_card.mojom-blink.h"
#include "services/network/public/mojom/permissions_policy/permissions_policy_feature.mojom-shared.h"
#include "third_party/blink/public/mojom/smart_card/smart_card.mojom-blink.h"
#include "third_party/blink/public/platform/browser_interface_broker_proxy.h"
#include "third_party/blink/renderer/core/execution_context/navigator_base.h"
#include "third_party/blink/renderer/modules/event_target_modules.h"
#include "third_party/blink/renderer/modules/smart_card/smart_card_context.h"
#include "third_party/blink/renderer/modules/smart_card/smart_card_error.h"
#include "third_party/blink/renderer/platform/bindings/exception_code.h"
#include "third_party/blink/renderer/platform/wtf/functional.h"
namespace blink {
namespace {
constexpr char kContextGone[] = "Script context has shut down.";
constexpr char kFeaturePolicyBlocked[] =
"Access to the feature \"smart-card\" is disallowed by permissions policy.";
constexpr char kNotSufficientlyIsolated[] =
"Frame is not sufficiently isolated to use smart cards.";
constexpr char kServiceDisconnected[] =
"Disconnected from the smart card service.";
bool ShouldBlockSmartCardServiceCall(ExecutionContext* context,
ExceptionState& exception_state) {
if (!context) {
exception_state.ThrowDOMException(DOMExceptionCode::kNotSupportedError,
kContextGone);
} else if (!context->IsIsolatedContext() ||
!context->IsFeatureEnabled(
network::mojom::PermissionsPolicyFeature::
kCrossOriginIsolated)) {
exception_state.ThrowSecurityError(kNotSufficientlyIsolated);
} else if (!context->IsFeatureEnabled(
network::mojom::PermissionsPolicyFeature::kSmartCard,
ReportOptions::kReportOnFailure)) {
exception_state.ThrowSecurityError(kFeaturePolicyBlocked);
}
return exception_state.HadException();
}
} // namespace
const char SmartCardResourceManager::kSupplementName[] =
"SmartCardResourceManager";
SmartCardResourceManager* SmartCardResourceManager::smartCard(
NavigatorBase& navigator) {
SmartCardResourceManager* smartcard =
Supplement<NavigatorBase>::From<SmartCardResourceManager>(navigator);
if (!smartcard) {
smartcard = MakeGarbageCollected<SmartCardResourceManager>(navigator);
ProvideTo(navigator, smartcard);
}
return smartcard;
}
SmartCardResourceManager::SmartCardResourceManager(NavigatorBase& navigator)
: Supplement<NavigatorBase>(navigator),
ExecutionContextLifecycleObserver(navigator.GetExecutionContext()),
service_(navigator.GetExecutionContext()) {}
void SmartCardResourceManager::ContextDestroyed() {
CloseServiceConnection();
}
void SmartCardResourceManager::Trace(Visitor* visitor) const {
visitor->Trace(service_);
visitor->Trace(create_context_promises_);
ScriptWrappable::Trace(visitor);
Supplement<NavigatorBase>::Trace(visitor);
ExecutionContextLifecycleObserver::Trace(visitor);
}
ScriptPromise<SmartCardContext> SmartCardResourceManager::establishContext(
ScriptState* script_state,
ExceptionState& exception_state) {
if (ShouldBlockSmartCardServiceCall(GetExecutionContext(), exception_state)) {
return EmptyPromise();
}
auto* resolver =
MakeGarbageCollected<ScriptPromiseResolver<SmartCardContext>>(
script_state, exception_state.GetContext());
create_context_promises_.insert(resolver);
EnsureServiceConnection();
service_->CreateContext(
WTF::BindOnce(&SmartCardResourceManager::OnCreateContextDone,
WrapPersistent(this), WrapPersistent(resolver)));
return resolver->Promise();
}
void SmartCardResourceManager::EnsureServiceConnection() {
DCHECK(GetExecutionContext());
if (service_.is_bound()) {
return;
}
auto task_runner =
GetExecutionContext()->GetTaskRunner(TaskType::kMiscPlatformAPI);
GetExecutionContext()->GetBrowserInterfaceBroker().GetInterface(
service_.BindNewPipeAndPassReceiver(task_runner));
service_.set_disconnect_handler(
WTF::BindOnce(&SmartCardResourceManager::CloseServiceConnection,
WrapWeakPersistent(this)));
}
void SmartCardResourceManager::OnCreateContextDone(
ScriptPromiseResolver<SmartCardContext>* resolver,
device::mojom::blink::SmartCardCreateContextResultPtr result) {
DCHECK(create_context_promises_.Contains(resolver));
create_context_promises_.erase(resolver);
if (result->is_error()) {
SmartCardError::MaybeReject(resolver, result->get_error());
return;
}
auto* context = MakeGarbageCollected<SmartCardContext>(
std::move(result->get_context()), GetExecutionContext());
resolver->Resolve(context);
}
void SmartCardResourceManager::CloseServiceConnection() {
service_.reset();
for (auto& resolver : create_context_promises_) {
ScriptState* script_state = resolver->GetScriptState();
if (!IsInParallelAlgorithmRunnable(resolver->GetExecutionContext(),
script_state)) {
continue;
}
ScriptState::Scope script_state_scope(script_state);
resolver->RejectWithDOMException(DOMExceptionCode::kInvalidStateError,
kServiceDisconnected);
}
create_context_promises_.clear();
}
} // namespace blink
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