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// Copyright 2020 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/memory/scoped_refptr.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "chrome/browser/interstitials/security_interstitial_page_test_utils.h"
#include "chrome/browser/net/system_network_context_manager.h"
#include "chrome/browser/policy/safe_browsing_policy_test.h"
#include "chrome/test/base/chrome_test_utils.h"
#include "components/policy/core/common/policy_map.h"
#include "components/policy/core/common/policy_types.h"
#include "components/policy/policy_constants.h"
#include "components/security_interstitials/content/security_interstitial_tab_helper.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/network_service_util.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "net/base/hash_value.h"
#include "net/cert/test_root_certs.h"
#include "net/cert/x509_certificate.h"
#include "net/cert/x509_util.h"
#include "net/test/cert_test_util.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "testing/gtest/include/gtest/gtest.h"
using content::BrowserThread;
namespace policy {
class CertificateTransparencyPolicyTest : public SafeBrowsingPolicyTest {
public:
CertificateTransparencyPolicyTest() {
SystemNetworkContextManager::SetEnableCertificateTransparencyForTesting(
true);
}
~CertificateTransparencyPolicyTest() override {
SystemNetworkContextManager::SetEnableCertificateTransparencyForTesting(
std::nullopt);
}
};
IN_PROC_BROWSER_TEST_F(CertificateTransparencyPolicyTest,
CertificateTransparencyEnforcementDisabledForUrls) {
SystemNetworkContextManager::GetInstance()->SetCTLogListTimelyForTesting();
// Make the test root be interpreted as a known root so that CT will be
// required.
scoped_refptr<net::X509Certificate> root_cert =
net::ImportCertFromFile(net::EmbeddedTestServer::GetRootCertPemPath());
ASSERT_TRUE(root_cert);
net::ScopedTestKnownRoot scoped_known_root(root_cert.get());
net::EmbeddedTestServer https_server_ok(net::EmbeddedTestServer::TYPE_HTTPS);
constexpr char kHostname[] = "example.com";
https_server_ok.SetCertHostnames({kHostname});
https_server_ok.ServeFilesFromSourceDirectory("chrome/test/data");
ASSERT_TRUE(https_server_ok.Start());
ASSERT_TRUE(NavigateToUrl(https_server_ok.GetURL(kHostname, "/"), this));
// The page should initially be blocked.
content::WebContents* tab = chrome_test_utils::GetActiveWebContents(this);
ASSERT_TRUE(IsShowingInterstitial(tab));
EXPECT_TRUE(chrome_browser_interstitials::IsInterstitialDisplayingText(
tab->GetPrimaryMainFrame(), "proceed-link"));
EXPECT_NE(u"OK", chrome_test_utils::GetActiveWebContents(this)->GetTitle());
// Now exempt the URL from being blocked by setting policy.
base::Value::List disabled_urls;
disabled_urls.Append(kHostname);
PolicyMap policies;
policies.Set(key::kCertificateTransparencyEnforcementDisabledForUrls,
POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER, POLICY_SOURCE_CLOUD,
base::Value(std::move(disabled_urls)), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
ASSERT_TRUE(
NavigateToUrl(https_server_ok.GetURL(kHostname, "/simple.html"), this));
// There should be no interstitial after the page loads.
EXPECT_FALSE(IsShowingInterstitial(tab));
EXPECT_EQ(u"OK", chrome_test_utils::GetActiveWebContents(this)->GetTitle());
// Now ensure that this setting still works after a network process crash.
if (!content::IsOutOfProcessNetworkService())
return;
ASSERT_TRUE(
NavigateToUrl(https_server_ok.GetURL(kHostname, "/title1.html"), this));
SimulateNetworkServiceCrash();
ASSERT_TRUE(
NavigateToUrl(https_server_ok.GetURL(kHostname, "/simple.html"), this));
// There should be no interstitial after the page loads.
EXPECT_FALSE(IsShowingInterstitial(tab));
EXPECT_EQ(u"OK", chrome_test_utils::GetActiveWebContents(this)->GetTitle());
}
IN_PROC_BROWSER_TEST_F(CertificateTransparencyPolicyTest,
CertificateTransparencyEnforcementDisabledForCas) {
SystemNetworkContextManager::GetInstance()->SetCTLogListTimelyForTesting();
// Make the test root be interpreted as a known root so that CT will be
// required.
scoped_refptr<net::X509Certificate> root_cert =
net::ImportCertFromFile(net::EmbeddedTestServer::GetRootCertPemPath());
ASSERT_TRUE(root_cert);
net::ScopedTestKnownRoot scoped_known_root(root_cert.get());
net::EmbeddedTestServer https_server_ok(net::EmbeddedTestServer::TYPE_HTTPS);
constexpr char kHostname[] = "example.com";
https_server_ok.SetCertHostnames({kHostname});
https_server_ok.ServeFilesFromSourceDirectory("chrome/test/data");
ASSERT_TRUE(https_server_ok.Start());
ASSERT_TRUE(NavigateToUrl(https_server_ok.GetURL(kHostname, "/"), this));
content::WebContents* web_contents =
chrome_test_utils::GetActiveWebContents(this);
// The page should initially be blocked.
content::RenderFrameHost* main_frame;
security_interstitials::SecurityInterstitialTabHelper* helper =
security_interstitials::SecurityInterstitialTabHelper::FromWebContents(
web_contents);
ASSERT_TRUE(helper);
ASSERT_TRUE(
helper->GetBlockingPageForCurrentlyCommittedNavigationForTesting());
main_frame = web_contents->GetPrimaryMainFrame();
ASSERT_TRUE(content::WaitForRenderFrameReady(main_frame));
EXPECT_TRUE(chrome_browser_interstitials::IsInterstitialDisplayingText(
main_frame, "proceed-link"));
EXPECT_NE(u"OK", chrome_test_utils::GetActiveWebContents(this)->GetTitle());
// Now exempt the leaf SPKI from being blocked by setting policy.
net::HashValue leaf_hash;
ASSERT_TRUE(net::x509_util::CalculateSha256SpkiHash(
https_server_ok.GetCertificate()->cert_buffer(), &leaf_hash));
base::Value::List disabled_spkis;
disabled_spkis.Append(leaf_hash.ToString());
PolicyMap policies;
policies.Set(key::kCertificateTransparencyEnforcementDisabledForCas,
POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER, POLICY_SOURCE_CLOUD,
base::Value(std::move(disabled_spkis)), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
ASSERT_TRUE(
NavigateToUrl(https_server_ok.GetURL(kHostname, "/simple.html"), this));
// Check we are no longer in the interstitial.
EXPECT_EQ(u"OK", chrome_test_utils::GetActiveWebContents(this)->GetTitle());
}
} // namespace policy
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