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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/webui/sandbox/sandbox_handler.h"
#include <utility>
#include "base/functional/bind.h"
#include "base/numerics/safe_conversions.h"
#include "base/values.h"
#include "content/public/browser/browser_child_process_host_iterator.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/child_process_data.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_ui.h"
#include "content/public/common/process_type.h"
#include "sandbox/policy/features.h"
#include "sandbox/policy/win/sandbox_win.h"
using content::BrowserChildProcessHostIterator;
using content::ChildProcessData;
using content::RenderProcessHost;
namespace sandbox_handler {
namespace {
base::Value::List FetchBrowserChildProcesses() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
base::Value::List browser_processes;
for (BrowserChildProcessHostIterator itr; !itr.Done(); ++itr) {
const ChildProcessData& process_data = itr.GetData();
// Only add processes that have already started, i.e. with valid handles.
if (!process_data.GetProcess().IsValid()) {
continue;
}
base::Value::Dict proc;
proc.Set("processId",
base::strict_cast<double>(process_data.GetProcess().Pid()));
proc.Set("processType",
content::GetProcessTypeNameInEnglish(process_data.process_type));
proc.Set("name", process_data.name);
proc.Set("metricsName", process_data.metrics_name);
proc.Set("sandboxType",
sandbox::policy::SandboxWin::GetSandboxTypeInEnglish(
process_data.sandbox_type));
browser_processes.Append(std::move(proc));
}
return browser_processes;
}
base::Value::List FetchRenderHostProcesses() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
base::Value::List renderer_processes;
for (RenderProcessHost::iterator it(RenderProcessHost::AllHostsIterator());
!it.IsAtEnd(); it.Advance()) {
RenderProcessHost* host = it.GetCurrentValue();
// Skip processes that might not have started yet.
if (!host->GetProcess().IsValid()) {
continue;
}
base::Value::Dict proc;
proc.Set("processId", base::strict_cast<double>(host->GetProcess().Pid()));
renderer_processes.Append(std::move(proc));
}
return renderer_processes;
}
base::Value::Dict FeatureToValue(const base::Feature& feature) {
base::Value::Dict feature_info;
feature_info.Set("name", feature.name);
feature_info.Set("enabled", base::FeatureList::IsEnabled(feature));
return feature_info;
}
base::Value::List FetchSandboxFeatures() {
base::Value::List features;
features.Append(
FeatureToValue(sandbox::policy::features::kNetworkServiceSandbox));
features.Append(
FeatureToValue(sandbox::policy::features::kRendererAppContainer));
features.Append(FeatureToValue(
sandbox::policy::features::kWinSboxDisableExtensionPoints));
features.Append(
FeatureToValue(sandbox::policy::features::kWinSboxZeroAppShim));
features.Append(
FeatureToValue(sandbox::policy::features::kWinSboxNoFakeGdiInit));
features.Append(FeatureToValue(
sandbox::policy::features::kWinSboxRestrictCoreSharingOnRenderer));
features.Append(
FeatureToValue(sandbox::policy::features::kEnableCsrssLockdown));
features.Append(FeatureToValue(
sandbox::policy::features::kWinSboxFilterServiceEnvironment));
return features;
}
} // namespace
SandboxHandler::SandboxHandler() = default;
SandboxHandler::~SandboxHandler() = default;
void SandboxHandler::RegisterMessages() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
web_ui()->RegisterMessageCallback(
"requestSandboxDiagnostics",
base::BindRepeating(&SandboxHandler::HandleRequestSandboxDiagnostics,
base::Unretained(this)));
}
void SandboxHandler::HandleRequestSandboxDiagnostics(
const base::Value::List& args) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
CHECK_EQ(1U, args.size());
sandbox_diagnostics_callback_id_ = args[0].Clone();
AllowJavascript();
browser_processes_ = FetchBrowserChildProcesses();
sandbox::policy::SandboxWin::GetPolicyDiagnostics(
base::BindOnce(&SandboxHandler::FetchSandboxDiagnosticsCompleted,
weak_ptr_factory_.GetWeakPtr()));
}
// This runs nested inside SandboxWin so we get out quickly.
void SandboxHandler::FetchSandboxDiagnosticsCompleted(
base::Value sandbox_policies) {
sandbox_policies_ = std::move(sandbox_policies);
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE, base::BindOnce(&SandboxHandler::GetRendererProcessesAndFinish,
weak_ptr_factory_.GetWeakPtr()));
}
void SandboxHandler::GetRendererProcessesAndFinish() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
auto renderer_processes = FetchRenderHostProcesses();
base::Value::Dict results;
results.Set("browser", std::move(browser_processes_));
results.Set("policies", std::move(sandbox_policies_));
results.Set("renderer", std::move(renderer_processes));
results.Set("features", FetchSandboxFeatures());
ResolveJavascriptCallback(sandbox_diagnostics_callback_id_,
std::move(results));
}
} // namespace sandbox_handler
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