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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/command_line.h"
#include "base/test/scoped_feature_list.h"
#include "chrome/browser/policy/policy_test_utils.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/common/pref_names.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "components/network_session_configurator/common/network_switches.h"
#include "components/policy/core/common/policy_map.h"
#include "components/policy/policy_constants.h"
#include "components/prefs/pref_service.h"
#include "content/public/browser/web_contents.h"
#include "content/public/common/content_features.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test_utils.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
namespace policy {
// This is a Chrome test since we need to access the Profile and Preferences.
class ChromeSharedArrayBufferBrowserTest : public PolicyTest {
public:
using WebFeature = blink::mojom::WebFeature;
ChromeSharedArrayBufferBrowserTest() {
feature_list_.InitWithFeatures(
// Enabled:
{},
// Disabled:
{
features::kSharedArrayBuffer,
});
}
content::WebContents* web_contents() const {
return browser()->tab_strip_model()->GetActiveWebContents();
}
void SetPolicyAndRestartBrowser() {
// The preference is false by default.
EXPECT_FALSE(browser()->profile()->GetPrefs()->GetBoolean(
prefs::kSharedArrayBufferUnrestrictedAccessAllowed));
PolicyMap policies;
policies.Set(key::kSharedArrayBufferUnrestrictedAccessAllowed,
POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER, POLICY_SOURCE_CLOUD,
base::Value(true), nullptr);
UpdateProviderPolicy(policies);
// Now the preference should be true.
EXPECT_TRUE(browser()->profile()->GetPrefs()->GetBoolean(
prefs::kSharedArrayBufferUnrestrictedAccessAllowed));
// The old browser has already created the ContentBrowserClient which reads
// the preference, so it can't create renderers with SABs enabled by policy.
// Create a new browser that will pick up the preference and enable SABs for
// new renderer processes.
Browser* new_browser = CreateBrowser(browser()->profile());
CloseBrowserSynchronously(browser());
SelectFirstBrowser();
ASSERT_EQ(browser(), new_browser);
// Clear existing spares and navigate the new browser to 'localhost', so the
// tests will get new renderer processes when they navigate to xxx.com
// origins.
content::SpareRenderProcessHostManager::Get().CleanupSparesForTesting();
GURL local_host = embedded_test_server()->GetURL("/empty.html");
EXPECT_TRUE(NavigateToURL(web_contents(), local_host));
}
private:
void SetUpOnMainThread() final {
PolicyTest::SetUpOnMainThread();
ASSERT_TRUE(embedded_test_server()->Start());
ASSERT_FALSE(base::FeatureList::IsEnabled(features::kSharedArrayBuffer));
}
void SetUpCommandLine(base::CommandLine* command_line) final {
PolicyTest::SetUpCommandLine(command_line);
command_line->AppendSwitch(switches::kIgnoreCertificateErrors);
}
base::test::ScopedFeatureList feature_list_;
};
IN_PROC_BROWSER_TEST_F(ChromeSharedArrayBufferBrowserTest,
PolicyEnablesSabConstructor) {
SetPolicyAndRestartBrowser();
GURL url = embedded_test_server()->GetURL("a.com", "/empty.html");
EXPECT_TRUE(NavigateToURL(web_contents(), url));
EXPECT_EQ(true, content::EvalJs(web_contents(),
"'SharedArrayBuffer' in globalThis"));
}
IN_PROC_BROWSER_TEST_F(ChromeSharedArrayBufferBrowserTest,
NoPolicyNoSabConstructor) {
GURL url = embedded_test_server()->GetURL("a.com", "/empty.html");
EXPECT_TRUE(NavigateToURL(web_contents(), url));
EXPECT_EQ(false, content::EvalJs(web_contents(),
"'SharedArrayBuffer' in globalThis"));
}
IN_PROC_BROWSER_TEST_F(ChromeSharedArrayBufferBrowserTest,
PolicyEnablesSharing) {
SetPolicyAndRestartBrowser();
GURL main_url = embedded_test_server()->GetURL("a.com", "/empty.html");
GURL sub_url = embedded_test_server()->GetURL("a.com", "/empty.html");
EXPECT_TRUE(content::NavigateToURL(web_contents(), main_url));
content::RenderFrameHost* main_document =
web_contents()->GetPrimaryMainFrame();
EXPECT_TRUE(content::ExecJs(main_document, content::JsReplace(R"(
g_sab_size = new Promise(resolve => {
addEventListener("message", event => resolve(event.data.byteLength));
});
g_iframe = document.createElement('iframe');
g_iframe.src = $1;
document.body.appendChild(g_iframe);
)",
sub_url)));
WaitForLoadStop(web_contents());
content::RenderFrameHost* sub_document = ChildFrameAt(main_document, 0);
EXPECT_EQ(false, EvalJs(main_document, "self.crossOriginIsolated"));
EXPECT_EQ(false, EvalJs(sub_document, "self.crossOriginIsolated"));
EXPECT_TRUE(ExecJs(sub_document, R"(
let sab = new SharedArrayBuffer(1234);
parent.postMessage(sab, "*");
)"));
EXPECT_EQ(1234, EvalJs(main_document, "g_sab_size"));
}
IN_PROC_BROWSER_TEST_F(ChromeSharedArrayBufferBrowserTest, NoPolicyNoSharing) {
GURL main_url = embedded_test_server()->GetURL("a.com", "/empty.html");
GURL sub_url = embedded_test_server()->GetURL("a.com", "/empty.html");
EXPECT_TRUE(content::NavigateToURL(web_contents(), main_url));
content::RenderFrameHost* main_document =
web_contents()->GetPrimaryMainFrame();
EXPECT_TRUE(content::ExecJs(web_contents(), content::JsReplace(R"(
g_sab_size = new Promise(resolve => {
addEventListener("message", event => resolve(event.data.byteLength));
});
g_iframe = document.createElement('iframe');
g_iframe.src = $1;
document.body.appendChild(g_iframe);
)",
sub_url)));
WaitForLoadStop(web_contents());
content::RenderFrameHost* sub_document = ChildFrameAt(main_document, 0);
EXPECT_EQ(false, EvalJs(main_document, "self.crossOriginIsolated"));
EXPECT_EQ(false, EvalJs(sub_document, "self.crossOriginIsolated"));
auto postSharedArrayBuffer = EvalJs(main_document, R"(
// Create a WebAssembly Memory to bypass the SAB constructor restriction.
const sab =
new WebAssembly.Memory({ shared:true, initial:1, maximum:1 }).buffer;
g_iframe.contentWindow.postMessage(sab,"*");
)");
EXPECT_THAT(
postSharedArrayBuffer.error,
testing::HasSubstr("Failed to execute 'postMessage' on 'Window': "));
}
} // namespace policy
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