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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299
|
// 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 "chrome/browser/safe_browsing/user_interaction_observer.h"
#include <string>
#include "base/metrics/field_trial_params.h"
#include "chrome/browser/profiles/profile.h"
#include "components/omnibox/browser/omnibox_prefs.h"
#include "components/prefs/pref_service.h"
#include "components/safe_browsing/buildflags.h"
#include "components/safe_browsing/core/common/features.h"
#include "content/public/browser/navigation_handle.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "extensions/buildflags/buildflags.h"
#include "third_party/blink/public/common/input/web_mouse_event.h"
#include "ui/events/keycodes/keyboard_codes.h"
using blink::WebInputEvent;
namespace safe_browsing {
WEB_CONTENTS_USER_DATA_KEY_IMPL(SafeBrowsingUserInteractionObserver);
SafeBrowsingUserInteractionObserver::SafeBrowsingUserInteractionObserver(
content::WebContents* web_contents,
const security_interstitials::UnsafeResource& resource,
scoped_refptr<SafeBrowsingUIManager> ui_manager)
: content::WebContentsUserData<SafeBrowsingUserInteractionObserver>(
*web_contents),
content::WebContentsObserver(web_contents),
resource_(resource),
ui_manager_(ui_manager),
creation_time_(base::Time::Now()),
clock_(base::DefaultClock::GetInstance()) {
DCHECK(base::FeatureList::IsEnabled(kDelayedWarnings));
key_press_callback_ =
base::BindRepeating(&SafeBrowsingUserInteractionObserver::HandleKeyPress,
base::Unretained(this));
mouse_event_callback_ = base::BindRepeating(
&SafeBrowsingUserInteractionObserver::HandleMouseEvent,
base::Unretained(this));
// Pass a callback to the RenderWidgetHost instead of implementing
// WebContentsObserver::DidGetUserInteraction(). The reason for this is that
// RenderWidgetHost handles keyboard events earlier and the callback can
// indicate that it wants the key press to be ignored.
// (DidGetUserInteraction() can only observe and not cancel the event.)
content::RenderWidgetHost* widget =
web_contents->GetPrimaryMainFrame()->GetRenderWidgetHost();
widget->AddKeyPressEventCallback(key_press_callback_);
widget->AddMouseEventCallback(mouse_event_callback_);
// Observe permission bubble events.
permissions::PermissionRequestManager* permission_request_manager =
permissions::PermissionRequestManager::FromWebContents(web_contents);
if (permission_request_manager) {
permission_request_manager->AddObserver(this);
}
}
SafeBrowsingUserInteractionObserver::~SafeBrowsingUserInteractionObserver() {
permissions::PermissionRequestManager* permission_request_manager =
permissions::PermissionRequestManager::FromWebContents(web_contents());
if (permission_request_manager) {
permission_request_manager->RemoveObserver(this);
}
web_contents()
->GetPrimaryMainFrame()
->GetRenderWidgetHost()
->RemoveKeyPressEventCallback(key_press_callback_);
web_contents()
->GetPrimaryMainFrame()
->GetRenderWidgetHost()
->RemoveMouseEventCallback(mouse_event_callback_);
}
// static
void SafeBrowsingUserInteractionObserver::CreateForWebContents(
content::WebContents* web_contents,
const security_interstitials::UnsafeResource& resource,
scoped_refptr<SafeBrowsingUIManager> ui_manager) {
// This method is called for all unsafe resources on |web_contents|. Only
// create an observer if there isn't one.
// TODO(crbug.com/40677238): The observer should observe all unsafe resources
// instead of the first one only.
content::WebContentsUserData<
SafeBrowsingUserInteractionObserver>::CreateForWebContents(web_contents,
resource,
ui_manager);
}
void SafeBrowsingUserInteractionObserver::RenderFrameHostChanged(
content::RenderFrameHost* old_frame,
content::RenderFrameHost* new_frame) {
// We currently only insert callbacks on the widget for the top-level main
// frame.
if (new_frame != web_contents()->GetPrimaryMainFrame())
return;
// The `old_frame` is null when the `new_frame` is the initial
// RenderFrameHost, which we already attached to in the constructor.
if (!old_frame)
return;
content::RenderWidgetHost* old_widget = old_frame->GetRenderWidgetHost();
old_widget->RemoveKeyPressEventCallback(key_press_callback_);
old_widget->RemoveMouseEventCallback(mouse_event_callback_);
content::RenderWidgetHost* new_widget = new_frame->GetRenderWidgetHost();
new_widget->AddKeyPressEventCallback(key_press_callback_);
new_widget->AddMouseEventCallback(mouse_event_callback_);
}
void SafeBrowsingUserInteractionObserver::WebContentsDestroyed() {
CleanUp();
Detach();
}
void SafeBrowsingUserInteractionObserver::DidFinishNavigation(
content::NavigationHandle* handle) {
// Remove the observer on a top frame navigation to another page. The user is
// now on another page so we don't need to wait for an interaction.
// Note that the check for HasCommitted() occurs later in this method as we
// want to handle downloads first.
if (!handle->IsInPrimaryMainFrame() || handle->IsSameDocument()) {
return;
}
// If this is the first navigation we are seeing, it must be the
// navigation that caused this observer to be created.
// As an example, if the user navigates to http://test.site, the order of
// events are:
// 1. SafeBrowsingUrlCheckerImpl detects that the URL should be blocked with
// an interstitial.
// 2. It delays the interstitial and creates an instance of this class.
// 3. DidFinishNavigation() of this class is called.
//
// This means that the first time we are here, we should ignore this event
// because it's not an interesting navigation. We only want to handle the
// navigations that follow.
if (!initial_navigation_finished_) {
initial_navigation_finished_ = true;
return;
}
// If a download happens when an instance of this observer is attached to
// the WebContents, DelayedNavigationThrottle cancels the download. As a
// result, the page should remain unchanged on downloads. Record a metric and
// ignore this cancelled navigation.
if (handle->IsDownload()) {
return;
}
// Now ignore other kinds of navigations that don't commit (e.g. 204 response
// codes), since the page doesn't change.
if (!handle->HasCommitted()) {
return;
}
Detach();
// DO NOT add code past this point. |this| is destroyed.
}
void SafeBrowsingUserInteractionObserver::Detach() {
web_contents()->RemoveUserData(UserDataKey());
// DO NOT add code past this point. |this| is destroyed.
}
void SafeBrowsingUserInteractionObserver::DidToggleFullscreenModeForTab(
bool entered_fullscreen,
bool will_cause_resize) {
// This class is only instantiated upon a navigation. If a page is in
// fullscreen mode, any navigation away from it should exit fullscreen. This
// means that this class is never instantiated while the current web contents
// is in fullscreen mode, so |entered_fullscreen| should never be false when
// this method is called for the first time. However, we don't know if it's
// guaranteed for a page to not be in fullscreen upon navigation, so we just
// ignore this event if the page exited fullscreen.
if (!entered_fullscreen) {
return;
}
// IMPORTANT: Store the web contents pointer in a temporary because |this| is
// deleted after ShowInterstitial().
content::WebContents* contents = web_contents();
ShowInterstitial(DelayedWarningEvent::kWarningShownOnFullscreenAttempt);
// Exit fullscreen only after navigating to the interstitial. We don't want to
// interfere with an ongoing fullscreen request.
contents->ExitFullscreen(will_cause_resize);
// DO NOT add code past this point. |this| is destroyed.
}
void SafeBrowsingUserInteractionObserver::OnPaste() {
ShowInterstitial(DelayedWarningEvent::kWarningShownOnPaste);
// DO NOT add code past this point. |this| is destroyed.
}
void SafeBrowsingUserInteractionObserver::OnPromptAdded() {
// The page requested a permission that triggered a permission prompt. Deny
// and show the interstitial.
permissions::PermissionRequestManager* permission_request_manager =
permissions::PermissionRequestManager::FromWebContents(web_contents());
if (!permission_request_manager) {
return;
}
permission_request_manager->Deny();
ShowInterstitial(DelayedWarningEvent::kWarningShownOnPermissionRequest);
// DO NOT add code past this point. |this| is destroyed.
}
void SafeBrowsingUserInteractionObserver::OnJavaScriptDialog() {
ShowInterstitial(DelayedWarningEvent::kWarningShownOnJavaScriptDialog);
// DO NOT add code past this point. |this| is destroyed.
}
void SafeBrowsingUserInteractionObserver::OnPasswordSaveOrAutofillDenied() {
if (password_save_or_autofill_denied_metric_recorded_) {
return;
}
password_save_or_autofill_denied_metric_recorded_ = true;
}
void SafeBrowsingUserInteractionObserver::OnDesktopCaptureRequest() {
ShowInterstitial(DelayedWarningEvent::kWarningShownOnDesktopCaptureRequest);
// DO NOT add code past this point. |this| is destroyed.
}
void SafeBrowsingUserInteractionObserver::SetClockForTesting(
base::Clock* clock) {
clock_ = clock;
}
base::Time SafeBrowsingUserInteractionObserver::GetCreationTimeForTesting()
const {
return creation_time_;
}
bool IsAllowedModifier(const input::NativeWebKeyboardEvent& event) {
const int key_modifiers =
event.GetModifiers() & blink::WebInputEvent::kKeyModifiers;
// If the only modifier is shift, the user may be typing uppercase
// letters.
if (key_modifiers == WebInputEvent::kShiftKey) {
return event.windows_key_code == ui::VKEY_SHIFT;
}
// Disallow CTRL+C and CTRL+V.
if (key_modifiers == WebInputEvent::kControlKey &&
(event.windows_key_code == ui::VKEY_C ||
event.windows_key_code == ui::VKEY_V)) {
return false;
}
return key_modifiers != 0;
}
bool SafeBrowsingUserInteractionObserver::HandleKeyPress(
const input::NativeWebKeyboardEvent& event) {
// Allow non-character keys such as ESC. These can be used to exit fullscreen,
// for example.
if (!event.IsCharacterKey() || event.is_browser_shortcut ||
IsAllowedModifier(event)) {
return false;
}
ShowInterstitial(DelayedWarningEvent::kWarningShownOnKeypress);
// DO NOT add code past this point. |this| is destroyed.
return true;
}
bool SafeBrowsingUserInteractionObserver::HandleMouseEvent(
const blink::WebMouseEvent& event) {
if (event.GetType() != blink::WebInputEvent::Type::kMouseDown) {
return false;
}
// If warning isn't enabled for mouse clicks, still record the first time when
// the user clicks.
if (!kDelayedWarningsEnableMouseClicks.Get()) {
if (!mouse_click_with_no_warning_recorded_) {
mouse_click_with_no_warning_recorded_ = true;
}
return false;
}
ShowInterstitial(DelayedWarningEvent::kWarningShownOnMouseClick);
// DO NOT add code past this point. |this| is destroyed.
return true;
}
void SafeBrowsingUserInteractionObserver::ShowInterstitial(
DelayedWarningEvent event) {
// Show the interstitial.
DCHECK(!interstitial_shown_);
interstitial_shown_ = true;
CleanUp();
ui_manager_->StartDisplayingBlockingPage(resource_);
Detach();
// DO NOT add code past this point. |this| is destroyed.
}
void SafeBrowsingUserInteractionObserver::CleanUp() {
content::RenderWidgetHost* widget =
web_contents()->GetPrimaryMainFrame()->GetRenderWidgetHost();
widget->RemoveKeyPressEventCallback(key_press_callback_);
widget->RemoveMouseEventCallback(mouse_event_callback_);
}
} // namespace safe_browsing
|