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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 <array>
#include <string>
#include "base/containers/contains.h"
#include "base/functional/bind.h"
#include "base/strings/utf_string_conversions.h"
#include "base/values.h"
#include "build/build_config.h"
#include "chrome/browser/apps/app_service/app_launch_params.h"
#include "chrome/browser/apps/app_service/app_service_proxy_factory.h"
#include "chrome/browser/policy/url_blocking_policy_test_utils.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/test/base/ui_test_utils.h"
#include "components/policy/core/common/policy_map.h"
#include "components/policy/core/common/policy_pref_names.h"
#include "components/policy/core/common/policy_types.h"
#include "components/policy/policy_constants.h"
#include "components/prefs/pref_service.h"
#include "content/public/browser/web_contents.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "net/test/embedded_test_server/http_request.h"
#include "net/test/embedded_test_server/http_response.h"
#include "url/gurl.h"
#if !BUILDFLAG(IS_MAC)
#include "extensions/browser/app_window/app_window.h"
#include "ui/base/window_open_disposition.h"
#endif
using content::BrowserThread;
namespace policy {
namespace {
// Verifies that the given url |spec| can be opened. This assumes that |spec|
// points at empty.html in the test data dir.
void CheckCanOpenURL(Browser* browser, const std::string& spec) {
GURL url(spec);
ASSERT_TRUE(ui_test_utils::NavigateToURL(browser, url));
content::WebContents* contents =
browser->tab_strip_model()->GetActiveWebContents();
EXPECT_EQ(url, contents->GetLastCommittedURL());
std::u16string blocked_page_title;
if (url.has_host()) {
blocked_page_title = base::UTF8ToUTF16(url.host());
} else {
// Local file paths show the full URL.
blocked_page_title = base::UTF8ToUTF16(url.spec());
}
EXPECT_NE(blocked_page_title, contents->GetTitle());
}
void CheckCanOpenViewSourceURL(Browser* browser, const std::string& spec) {
GURL view_source_url("view-source:" + spec);
ASSERT_TRUE(ui_test_utils::NavigateToURL(browser, view_source_url));
content::WebContents* contents =
browser->tab_strip_model()->GetActiveWebContents();
EXPECT_EQ(view_source_url, contents->GetLastCommittedURL());
}
// Handler for embedded http-server, returns a small page with javascript
// variable and a link to increment it. It's for JavascriptBlocklistable test.
std::unique_ptr<net::test_server::HttpResponse> JSIncrementerPageHandler(
const net::test_server::HttpRequest& request) {
if (request.relative_url != "/test.html") {
return nullptr;
}
std::unique_ptr<net::test_server::BasicHttpResponse> http_response(
new net::test_server::BasicHttpResponse());
http_response->set_code(net::HTTP_OK);
http_response->set_content(
"<head><script type=\"text/javascript\">\n"
"<!--\n"
"var value = 1;"
"var increment = function() {"
" value = value + 1;"
"};\n"
"//-->\n"
"</script></head><body>"
"<a id='link' href=\"javascript:increment();\">click</a>"
"</body>");
http_response->set_content_type("text/html");
return http_response;
}
// Fetch value from page generated by JSIncrementerPageHandler.
int JSIncrementerFetch(content::WebContents* contents) {
return content::EvalJs(contents, "value;").ExtractInt();
}
} // namespace
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, URLBlocklist) {
// Checks that URLs can be blocklisted, and that exceptions can be made to
// the blocklist.
ASSERT_TRUE(embedded_test_server()->Start());
const auto kURLS = std::to_array<std::string>({
embedded_test_server()->GetURL("aaa.com", "/empty.html").spec(),
embedded_test_server()->GetURL("bbb.com", "/empty.html").spec(),
embedded_test_server()->GetURL("sub.bbb.com", "/empty.html").spec(),
embedded_test_server()->GetURL("bbb.com", "/policy/blank.html").spec(),
embedded_test_server()->GetURL("bbb.com.", "/policy/blank.html").spec(),
});
// Verify that "bbb.com" opens before applying the blocklist.
CheckCanOpenURL(browser(), kURLS[1]);
// Set a blocklist.
base::Value::List blocklist;
blocklist.Append("bbb.com");
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(std::move(blocklist)), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
// All bbb.com URLs are blocked, and "aaa.com" is still unblocked.
CheckCanOpenURL(browser(), kURLS[0]);
for (size_t i = 1; i < std::size(kURLS); ++i)
CheckURLIsBlocked(browser(), kURLS[i]);
// Allowlist some sites of bbb.com.
base::Value::List allowlist;
allowlist.Append("sub.bbb.com");
allowlist.Append("bbb.com/policy");
policies.Set(key::kURLAllowlist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(allowlist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
CheckURLIsBlocked(browser(), kURLS[1]);
CheckCanOpenURL(browser(), kURLS[2]);
CheckCanOpenURL(browser(), kURLS[3]);
CheckCanOpenURL(browser(), kURLS[4]);
}
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, URLBlocklistViewSource) {
// Checks that blocklisted urls are blocked when accessed by via view-source:,
// and that blocklisting view-source:* blocks all view-source urls.
ASSERT_TRUE(embedded_test_server()->Start());
const std::string kURL_A =
embedded_test_server()->GetURL("aaa.com", "/empty.html").spec();
const std::string kURL_B =
embedded_test_server()->GetURL("bbb.com", "/empty.html").spec();
// Ensure that no urls are blocked by default.
CheckCanOpenURL(browser(), kURL_A);
CheckCanOpenURL(browser(), kURL_B);
CheckCanOpenViewSourceURL(browser(), kURL_A);
CheckCanOpenViewSourceURL(browser(), kURL_B);
// Block bbb.com urls.
base::Value::List blocklist;
blocklist.Append("bbb.com");
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
// Verify that blocking bbb.com also blocks view-source:bbb.com.
CheckURLIsBlocked(browser(), kURL_B);
CheckViewSourceURLIsBlocked(browser(), kURL_B);
// Block all view-source urls.
blocklist.Append("view-source:*");
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
// Verify that blocking view-source:* blocks view-source:aaa.com but does not
// block http://aaa.com.
CheckViewSourceURLIsBlocked(browser(), kURL_A);
CheckCanOpenURL(browser(), kURL_A);
}
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, URLBlocklistNonStandardScheme) {
// Checks that non-standard schemes can be blocklisted, and that the blocking
// page mentions the URL's scheme.
const std::string kURL = "mailto:nobody";
// Block mailto: urls.
base::Value::List blocklist;
blocklist.Append("mailto:*");
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
// Ensure the URL is blocked.
CheckURLIsBlocked(browser(), kURL);
// Ensure the blocking page mentions the scheme.
content::WebContents* contents =
browser()->tab_strip_model()->GetActiveWebContents();
std::string result =
content::EvalJs(contents, "document.body.textContent;").ExtractString();
EXPECT_THAT(result, testing::HasSubstr("mailto"));
}
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, URLBlocklistIncognito) {
// Checks that URLs can be blocklisted, and that exceptions can be made to
// the blocklist.
Browser* incognito_browser =
OpenURLOffTheRecord(browser()->profile(), GURL("about:blank"));
ASSERT_TRUE(embedded_test_server()->Start());
const auto kURLS = std::to_array<std::string>({
embedded_test_server()->GetURL("aaa.com", "/empty.html").spec(),
embedded_test_server()->GetURL("bbb.com", "/empty.html").spec(),
embedded_test_server()->GetURL("sub.bbb.com", "/empty.html").spec(),
embedded_test_server()->GetURL("bbb.com", "/policy/blank.html").spec(),
embedded_test_server()->GetURL("bbb.com.", "/policy/blank.html").spec(),
});
// Verify that "bbb.com" opens before applying the blocklist.
CheckCanOpenURL(incognito_browser, kURLS[1]);
// Set a blocklist.
base::Value::List blocklist;
blocklist.Append("bbb.com");
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
// All bbb.com URLs are blocked, and "aaa.com" is still unblocked.
CheckCanOpenURL(incognito_browser, kURLS[0]);
for (size_t i = 1; i < std::size(kURLS); ++i)
CheckURLIsBlocked(incognito_browser, kURLS[i]);
// Allowlist some sites of bbb.com.
base::Value::List allowlist;
allowlist.Append("sub.bbb.com");
allowlist.Append("bbb.com/policy");
policies.Set(key::kURLAllowlist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(allowlist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
CheckURLIsBlocked(incognito_browser, kURLS[1]);
CheckCanOpenURL(incognito_browser, kURLS[2]);
CheckCanOpenURL(incognito_browser, kURLS[3]);
CheckCanOpenURL(incognito_browser, kURLS[4]);
}
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, URLBlocklistAndAllowlist) {
// Regression test for http://crbug.com/755256. Blocklisting * and
// allowlisting an origin should work.
ASSERT_TRUE(embedded_test_server()->Start());
base::Value::List blocklist;
blocklist.Append("*");
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
base::Value::List allowlist;
allowlist.Append("aaa.com");
policies.Set(key::kURLAllowlist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(allowlist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
CheckCanOpenURL(
browser(),
embedded_test_server()->GetURL("aaa.com", "/empty.html").spec());
}
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, URLBlocklistSubresources) {
// Checks that an image with a blocklisted URL is loaded, but an iframe with a
// blocklisted URL is not.
ASSERT_TRUE(embedded_test_server()->Start());
GURL main_url =
embedded_test_server()->GetURL("/policy/denylist-subresources.html");
GURL image_url = embedded_test_server()->GetURL("/policy/pixel.png");
GURL subframe_url = embedded_test_server()->GetURL("/policy/blank.html");
// Set a blocklist containing the image and the iframe which are used by the
// main document.
base::Value::List blocklist;
blocklist.Append(image_url.spec().c_str());
blocklist.Append(subframe_url.spec().c_str());
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
ASSERT_TRUE(ui_test_utils::NavigateToURL(browser(), main_url));
EXPECT_EQ("success", content::EvalJs(
browser()->tab_strip_model()->GetActiveWebContents(),
"imageLoadResult"));
ASSERT_TRUE(ui_test_utils::NavigateToURL(browser(), main_url));
EXPECT_EQ("error", content::EvalJs(
browser()->tab_strip_model()->GetActiveWebContents(),
"iframeLoadResult"));
}
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, URLBlocklistClientRedirect) {
// Checks that a client side redirect to a blocklisted URL is blocked.
ASSERT_TRUE(embedded_test_server()->Start());
GURL redirected_url =
embedded_test_server()->GetURL("/policy/denylist-redirect.html");
GURL first_url = embedded_test_server()->GetURL("/client-redirect?" +
redirected_url.spec());
// There are two navigations: one when loading client-redirect.html and
// another when the document redirects using http-equiv="refresh".
ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(browser(),
first_url, 2);
EXPECT_EQ(u"Redirected!",
browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
base::Value::List blocklist;
blocklist.Append(redirected_url.spec().c_str());
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
ASSERT_TRUE(ui_test_utils::NavigateToURL(browser(), first_url));
content::WaitForLoadStop(
browser()->tab_strip_model()->GetActiveWebContents());
EXPECT_NE(u"Redirected!",
browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
}
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, URLBlocklistServerRedirect) {
// Checks that a server side redirect to a blocklisted URL is blocked.
ASSERT_TRUE(embedded_test_server()->Start());
GURL redirected_url =
embedded_test_server()->GetURL("/policy/denylist-redirect.html");
GURL first_url = embedded_test_server()->GetURL("/server-redirect?" +
redirected_url.spec());
ASSERT_TRUE(ui_test_utils::NavigateToURL(browser(), first_url));
content::WaitForLoadStop(
browser()->tab_strip_model()->GetActiveWebContents());
EXPECT_EQ(u"Redirected!",
browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
base::Value::List blocklist;
blocklist.Append(redirected_url.spec().c_str());
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
ASSERT_TRUE(ui_test_utils::NavigateToURL(browser(), first_url));
content::WaitForLoadStop(
browser()->tab_strip_model()->GetActiveWebContents());
EXPECT_NE(u"Redirected!",
browser()->tab_strip_model()->GetActiveWebContents()->GetTitle());
}
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, FileURLBlocklist) {
// Check that FileURLs can be blocklisted and DisabledSchemes works together
// with URLblocklisting and URLallowlisting.
base::FilePath test_path;
GetTestDataDirectory(&test_path);
const std::string base_path = "file://" + test_path.AsUTF8Unsafe() + "/";
const std::string folder_path = base_path + "apptest/";
const std::string file_path1 = base_path + "title1.html";
const std::string file_path2 = folder_path + "basic.html";
CheckCanOpenURL(browser(), file_path1);
CheckCanOpenURL(browser(), file_path2);
// Set a blocklist for all the files.
base::Value::List blocklist;
blocklist.Append("file://*");
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
CheckURLIsBlocked(browser(), file_path1);
CheckURLIsBlocked(browser(), file_path2);
// Replace the URLblocklist with disabling the file scheme.
blocklist.EraseValue(base::Value("file://*"));
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
PrefService* prefs = browser()->profile()->GetPrefs();
EXPECT_FALSE(base::Contains(prefs->GetList(policy_prefs::kUrlBlocklist),
(base::Value("file://*"))));
base::Value::List disabledscheme;
disabledscheme.Append("file");
policies.Set(key::kDisabledSchemes, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(disabledscheme.Clone()),
nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
EXPECT_TRUE(base::Contains(prefs->GetList(policy_prefs::kUrlBlocklist),
base::Value("file://*")));
// Allowlist one folder and blocklist an another just inside.
base::Value::List allowlist;
allowlist.Append(base_path);
policies.Set(key::kURLAllowlist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(allowlist.Clone()), nullptr);
blocklist.Append(folder_path);
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
CheckCanOpenURL(browser(), file_path1);
CheckURLIsBlocked(browser(), file_path2);
}
// Tests that javascript-links are handled properly according to blocklist
// settings, bug crbug/913334.
IN_PROC_BROWSER_TEST_F(UrlBlockingPolicyTest, JavascriptBlocklistable) {
embedded_test_server()->RegisterRequestHandler(
base::BindRepeating(&JSIncrementerPageHandler));
ASSERT_TRUE(embedded_test_server()->Start());
content::WebContents* contents =
browser()->tab_strip_model()->GetActiveWebContents();
ASSERT_TRUE(ui_test_utils::NavigateToURL(
browser(), embedded_test_server()->GetURL("/test.html")));
EXPECT_EQ(JSIncrementerFetch(contents), 1);
// Without blocklist policy value is incremented properly.
ui_test_utils::NavigateToURLWithDisposition(
browser(), GURL("javascript:increment()"),
WindowOpenDisposition::CURRENT_TAB, ui_test_utils::BROWSER_TEST_NO_WAIT);
EXPECT_EQ(JSIncrementerFetch(contents), 2);
// Create and apply a policy.
base::Value::List blocklist;
blocklist.Append("javascript://*");
PolicyMap policies;
policies.Set(key::kURLBlocklist, POLICY_LEVEL_MANDATORY, POLICY_SCOPE_USER,
POLICY_SOURCE_CLOUD, base::Value(blocklist.Clone()), nullptr);
UpdateProviderPolicy(policies);
FlushBlocklistPolicy();
// After applying policy javascript URLs don't work any more, value leaves
// unchanged.
ui_test_utils::NavigateToURLWithDisposition(
browser(), GURL("javascript:increment()"),
WindowOpenDisposition::CURRENT_TAB, ui_test_utils::BROWSER_TEST_NO_WAIT);
EXPECT_EQ(JSIncrementerFetch(contents), 2);
// But in-page links still work even if they are javascript-links.
EXPECT_TRUE(
content::ExecJs(contents, "document.getElementById('link').click();"));
EXPECT_EQ(JSIncrementerFetch(contents), 3);
}
} // namespace policy
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