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// Copyright 2017 The Chromium Authors. All rights reserved.
// 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/core/feature_policy/dom_feature_policy.h"
#include "third_party/blink/public/mojom/feature_policy/feature_policy.mojom-blink.h"
#include "third_party/blink/renderer/core/dom/document.h"
#include "third_party/blink/renderer/core/feature_policy/feature_policy_parser.h"
#include "third_party/blink/renderer/core/inspector/console_message.h"
#include "third_party/blink/renderer/platform/bindings/script_state.h"
#include "third_party/blink/renderer/platform/weborigin/security_origin.h"
#include "third_party/blink/renderer/platform/wtf/text/string_utf8_adaptor.h"
namespace blink {
bool DOMFeaturePolicy::allowsFeature(ScriptState* script_state,
const String& feature) const {
ExecutionContext* execution_context =
script_state ? ExecutionContext::From(script_state) : nullptr;
if (GetAvailableFeatures(execution_context).Contains(feature)) {
auto feature_name = GetDefaultFeatureNameMap().at(feature);
mojom::PolicyValueType feature_type =
GetPolicy()->GetFeatureList().at(feature_name).second;
PolicyValue value = PolicyValue::CreateMaxPolicyValue(feature_type);
return GetPolicy()->IsFeatureEnabled(feature_name, value);
}
AddWarningForUnrecognizedFeature(feature);
return false;
}
bool DOMFeaturePolicy::allowsFeature(ScriptState* script_state,
const String& feature,
const String& url) const {
ExecutionContext* execution_context =
script_state ? ExecutionContext::From(script_state) : nullptr;
scoped_refptr<const SecurityOrigin> origin =
SecurityOrigin::CreateFromString(url);
if (!origin || origin->IsOpaque()) {
GetDocument()->AddConsoleMessage(ConsoleMessage::Create(
mojom::ConsoleMessageSource::kOther,
mojom::ConsoleMessageLevel::kWarning,
"Invalid origin url for feature '" + feature + "': " + url + "."));
return false;
}
if (!GetAvailableFeatures(execution_context).Contains(feature)) {
AddWarningForUnrecognizedFeature(feature);
return false;
}
auto feature_name = GetDefaultFeatureNameMap().at(feature);
mojom::PolicyValueType feature_type =
GetPolicy()->GetFeatureList().at(feature_name).second;
PolicyValue value = PolicyValue::CreateMaxPolicyValue(feature_type);
return GetPolicy()->IsFeatureEnabledForOrigin(feature_name,
origin->ToUrlOrigin(), value);
}
Vector<String> DOMFeaturePolicy::features(ScriptState* script_state) const {
ExecutionContext* execution_context =
script_state ? ExecutionContext::From(script_state) : nullptr;
return GetAvailableFeatures(execution_context);
}
Vector<String> DOMFeaturePolicy::allowedFeatures(
ScriptState* script_state) const {
ExecutionContext* execution_context =
script_state ? ExecutionContext::From(script_state) : nullptr;
Vector<String> allowed_features;
for (const String& feature : GetAvailableFeatures(execution_context)) {
auto feature_name = GetDefaultFeatureNameMap().at(feature);
mojom::PolicyValueType feature_type =
GetPolicy()->GetFeatureList().at(feature_name).second;
PolicyValue value = PolicyValue::CreateMaxPolicyValue(feature_type);
if (GetPolicy()->IsFeatureEnabled(feature_name, value))
allowed_features.push_back(feature);
}
return allowed_features;
}
Vector<String> DOMFeaturePolicy::getAllowlistForFeature(
ScriptState* script_state,
const String& feature) const {
ExecutionContext* execution_context =
script_state ? ExecutionContext::From(script_state) : nullptr;
if (GetAvailableFeatures(execution_context).Contains(feature)) {
auto feature_name = GetDefaultFeatureNameMap().at(feature);
auto feature_type = GetPolicy()->GetFeatureList().at(feature_name).second;
const FeaturePolicy::Allowlist allowlist =
GetPolicy()->GetAllowlistForFeature(feature_name);
auto values = allowlist.Values();
PolicyValue max_value = PolicyValue::CreateMaxPolicyValue(feature_type);
if (values.empty()) {
if (allowlist.GetFallbackValue().Type() !=
mojom::PolicyValueType::kNull &&
allowlist.GetFallbackValue() >= max_value)
return Vector<String>({"*"});
}
Vector<String> result;
for (const auto& entry : values) {
result.push_back(WTF::String::FromUTF8(entry.first.Serialize()));
}
return result;
}
AddWarningForUnrecognizedFeature(feature);
return Vector<String>();
}
void DOMFeaturePolicy::AddWarningForUnrecognizedFeature(
const String& feature) const {
GetDocument()->AddConsoleMessage(ConsoleMessage::Create(
mojom::ConsoleMessageSource::kOther, mojom::ConsoleMessageLevel::kWarning,
"Unrecognized feature: '" + feature + "'."));
}
void DOMFeaturePolicy::Trace(blink::Visitor* visitor) {
ScriptWrappable::Trace(visitor);
}
void DOMFeaturePolicy::UpdateContainerPolicy(
const ParsedFeaturePolicy& container_policy,
scoped_refptr<const SecurityOrigin> src_origin) {}
} // namespace blink
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