1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/blocked_content/safe_browsing_triggered_popup_blocker.h"
#include <utility>
#include "base/memory/ptr_util.h"
#include "base/metrics/histogram_macros.h"
#include "components/back_forward_cache/back_forward_cache_disable.h"
#include "components/blocked_content/pref_names.h"
#include "components/pref_registry/pref_registry_syncable.h"
#include "components/prefs/pref_service.h"
#include "components/safe_browsing/core/browser/db/util.h"
#include "components/safe_browsing/core/browser/db/v4_protocol_manager_util.h"
#include "components/subresource_filter/content/browser/safe_browsing_page_activation_throttle.h"
#include "components/user_prefs/user_prefs.h"
#include "content/public/browser/back_forward_cache.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/frame_type.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/render_frame_host.h"
#include "content/public/browser/web_contents.h"
#include "third_party/blink/public/mojom/devtools/console_message.mojom.h"
#include "third_party/blink/public/mojom/frame/frame.mojom.h"
namespace blocked_content {
namespace {
void LogAction(SafeBrowsingTriggeredPopupBlocker::Action action) {
UMA_HISTOGRAM_ENUMERATION("ContentSettings.Popups.StrongBlockerActions",
action,
SafeBrowsingTriggeredPopupBlocker::Action::kCount);
}
} // namespace
using safe_browsing::SubresourceFilterLevel;
BASE_FEATURE(kAbusiveExperienceEnforce,
"AbusiveExperienceEnforce",
base::FEATURE_ENABLED_BY_DEFAULT);
SafeBrowsingTriggeredPopupBlocker::PageData::PageData(content::Page& page)
: PageUserData(page) {}
SafeBrowsingTriggeredPopupBlocker::PageData::~PageData() = default;
SafeBrowsingTriggeredPopupBlocker::NavigationHandleData::NavigationHandleData(
content::NavigationHandle&) {}
SafeBrowsingTriggeredPopupBlocker::NavigationHandleData::
~NavigationHandleData() = default;
// static
void SafeBrowsingTriggeredPopupBlocker::RegisterProfilePrefs(
user_prefs::PrefRegistrySyncable* registry) {
registry->RegisterBooleanPref(prefs::kAbusiveExperienceInterventionEnforce,
true /* default_value */);
}
// static
void SafeBrowsingTriggeredPopupBlocker::MaybeCreate(
content::WebContents* web_contents) {
if (!IsEnabled(web_contents))
return;
auto* observer_manager =
subresource_filter::SubresourceFilterObserverManager::FromWebContents(
web_contents);
if (!observer_manager)
return;
if (FromWebContents(web_contents))
return;
web_contents->SetUserData(
UserDataKey(), base::WrapUnique(new SafeBrowsingTriggeredPopupBlocker(
web_contents, observer_manager)));
}
SafeBrowsingTriggeredPopupBlocker::~SafeBrowsingTriggeredPopupBlocker() =
default;
bool SafeBrowsingTriggeredPopupBlocker::ShouldApplyAbusivePopupBlocker(
content::Page& page) {
LogAction(Action::kConsidered);
PageData& page_data = GetPageData(page);
if (!page_data.is_triggered())
return false;
if (!IsEnabled(web_contents()))
return false;
LogAction(Action::kBlocked);
page_data.inc_num_popups_blocked();
page.GetMainDocument().AddMessageToConsole(
blink::mojom::ConsoleMessageLevel::kError, kAbusiveEnforceMessage);
return true;
}
SafeBrowsingTriggeredPopupBlocker::SafeBrowsingTriggeredPopupBlocker(
content::WebContents* web_contents,
subresource_filter::SubresourceFilterObserverManager* observer_manager)
: content::WebContentsObserver(web_contents),
content::WebContentsUserData<SafeBrowsingTriggeredPopupBlocker>(
*web_contents) {
DCHECK(observer_manager);
scoped_observation_.Observe(observer_manager);
}
void SafeBrowsingTriggeredPopupBlocker::DidFinishNavigation(
content::NavigationHandle* navigation_handle) {
if (!navigation_handle->IsInMainFrame() ||
navigation_handle->GetNavigatingFrameType() ==
content::FrameType::kFencedFrameRoot) {
return;
}
std::optional<SubresourceFilterLevel> level;
NavigationHandleData* data =
NavigationHandleData::GetOrCreateForNavigationHandle(*navigation_handle);
data->level_for_next_committed_navigation().swap(level);
// Only care about main frame navigations that commit.
if (!navigation_handle->HasCommitted() ||
navigation_handle->IsSameDocument()) {
return;
}
if (navigation_handle->IsErrorPage())
return;
// Log a warning only if we've matched a warn-only safe browsing list.
if (level == SubresourceFilterLevel::ENFORCE) {
GetPageData(navigation_handle->GetRenderFrameHost()->GetPage())
.set_is_triggered(true);
LogAction(Action::kEnforcedSite);
// When a page is restored from back-forward cache, we don't get
// OnSafeBrowsingChecksComplete callback, so |level| will always
// be empty.
// To work around this, we disable back-forward cache if the original
// page load had abusive enforcement - this means that not doing checks on
// back-forward navigation is fine as it's guaranteed that
// the original page load didn't have enforcement.
// Note that it's possible for the safe browsing list to update while
// the page is in the cache, the risk of this is mininal due to
// having a time limit for how long pages are allowed to be in the
// cache.
content::BackForwardCache::DisableForRenderFrameHost(
navigation_handle->GetRenderFrameHost(),
back_forward_cache::DisabledReason(
back_forward_cache::DisabledReasonId::
kSafeBrowsingTriggeredPopupBlocker));
} else if (level == SubresourceFilterLevel::WARN) {
navigation_handle->GetRenderFrameHost()->AddMessageToConsole(
blink::mojom::ConsoleMessageLevel::kWarning, kAbusiveWarnMessage);
LogAction(Action::kWarningSite);
}
LogAction(Action::kNavigation);
}
// This method will always be called before the DidFinishNavigation associated
// with this handle.
// The exception is a navigation restoring a page from back-forward cache --
// in that case don't issue any requests, therefore we don't get any
// safe browsing callbacks. See the comment above for the mitigation.
void SafeBrowsingTriggeredPopupBlocker::OnSafeBrowsingChecksComplete(
content::NavigationHandle* navigation_handle,
const subresource_filter::SubresourceFilterSafeBrowsingClient::CheckResult&
result) {
DCHECK(navigation_handle->IsInMainFrame());
// TODO(crbug.com/40202987): Replace it with DCHECK.
if (navigation_handle->GetNavigatingFrameType() ==
content::FrameType::kFencedFrameRoot) {
return;
}
std::optional<safe_browsing::SubresourceFilterLevel> match_level;
if (result.threat_type ==
safe_browsing::SBThreatType::SB_THREAT_TYPE_SUBRESOURCE_FILTER) {
auto abusive = result.threat_metadata.subresource_filter_match.find(
safe_browsing::SubresourceFilterType::ABUSIVE);
if (abusive != result.threat_metadata.subresource_filter_match.end())
match_level = abusive->second;
}
if (match_level.has_value()) {
NavigationHandleData* data =
NavigationHandleData::GetOrCreateForNavigationHandle(
*navigation_handle);
data->level_for_next_committed_navigation() = match_level;
}
}
void SafeBrowsingTriggeredPopupBlocker::OnSubresourceFilterGoingAway() {
DCHECK(scoped_observation_.IsObserving());
scoped_observation_.Reset();
}
bool SafeBrowsingTriggeredPopupBlocker::IsEnabled(
content::WebContents* web_contents) {
// If feature is disabled, return false. This is done so that if the feature
// is broken it can be disabled irrespective of the policy.
if (!base::FeatureList::IsEnabled(kAbusiveExperienceEnforce))
return false;
// If enterprise policy is not set, this will return true which is the default
// preference value.
return user_prefs::UserPrefs::Get(web_contents->GetBrowserContext())
->GetBoolean(prefs::kAbusiveExperienceInterventionEnforce);
}
SafeBrowsingTriggeredPopupBlocker::PageData&
SafeBrowsingTriggeredPopupBlocker::GetPageData(content::Page& page) {
return *PageData::GetOrCreateForPage(page);
}
PAGE_USER_DATA_KEY_IMPL(SafeBrowsingTriggeredPopupBlocker::PageData);
NAVIGATION_HANDLE_USER_DATA_KEY_IMPL(
SafeBrowsingTriggeredPopupBlocker::NavigationHandleData);
WEB_CONTENTS_USER_DATA_KEY_IMPL(SafeBrowsingTriggeredPopupBlocker);
} // namespace blocked_content
|
