1 /*
2  * Copyright (C) 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 package com.android.settings.safetycenter;
18 
19 import static android.safetycenter.SafetyEvent.SAFETY_EVENT_TYPE_SOURCE_STATE_CHANGED;
20 
21 import android.app.PendingIntent;
22 import android.app.settings.SettingsEnums;
23 import android.content.Context;
24 import android.content.Intent;
25 import android.os.UserHandle;
26 import android.os.UserManager;
27 import android.safetycenter.SafetyEvent;
28 import android.safetycenter.SafetySourceData;
29 import android.safetycenter.SafetySourceIssue;
30 import android.safetycenter.SafetySourceStatus;
31 import android.safetycenter.SafetySourceStatus.IconAction;
32 
33 import com.android.settings.R;
34 import com.android.settings.security.ScreenLockPreferenceDetailsUtils;
35 import com.android.settingslib.RestrictedLockUtils;
36 import com.android.settingslib.RestrictedLockUtilsInternal;
37 
38 /** Lock Screen Safety Source for Safety Center. */
39 public final class LockScreenSafetySource {
40 
41     public static final String SAFETY_SOURCE_ID = "AndroidLockScreen";
42     public static final String NO_SCREEN_LOCK_ISSUE_ID = "NoScreenLockIssue";
43     public static final String NO_SCREEN_LOCK_ISSUE_TYPE_ID = "NoScreenLockIssueType";
44     public static final String SET_SCREEN_LOCK_ACTION_ID = "SetScreenLockAction";
45 
46     private static final int REQUEST_CODE_SCREEN_LOCK = 1;
47     private static final int REQUEST_CODE_SCREEN_LOCK_SETTINGS = 2;
48 
LockScreenSafetySource()49     private LockScreenSafetySource() {}
50 
51     /** Sets lock screen safety data for Safety Center. */
setSafetySourceData( Context context, ScreenLockPreferenceDetailsUtils screenLockPreferenceDetailsUtils, SafetyEvent safetyEvent)52     public static void setSafetySourceData(
53             Context context,
54             ScreenLockPreferenceDetailsUtils screenLockPreferenceDetailsUtils,
55             SafetyEvent safetyEvent) {
56         if (!SafetyCenterManagerWrapper.get().isEnabled(context)) {
57             return;
58         }
59 
60         UserManager userManager = context.getSystemService(UserManager.class);
61         if (userManager != null && userManager.isProfile()) {
62             return; // LockScreen source only supports primary profile.
63         }
64 
65         if (!screenLockPreferenceDetailsUtils.isAvailable()) {
66             SafetyCenterManagerWrapper.get()
67                     .setSafetySourceData(
68                             context, SAFETY_SOURCE_ID, /* safetySourceData= */ null, safetyEvent);
69             return;
70         }
71 
72         final int userId = UserHandle.myUserId();
73         final RestrictedLockUtils.EnforcedAdmin admin =
74                 RestrictedLockUtilsInternal.checkIfPasswordQualityIsSet(context, userId);
75         final PendingIntent pendingIntent =
76                 createPendingIntent(
77                         context,
78                         screenLockPreferenceDetailsUtils.getLaunchChooseLockGenericFragmentIntent(
79                                 SettingsEnums.SAFETY_CENTER),
80                         REQUEST_CODE_SCREEN_LOCK);
81         final IconAction gearMenuIconAction =
82                 createGearMenuIconAction(context, screenLockPreferenceDetailsUtils);
83         final boolean lockScreenAllowedByAdmin =
84                 !screenLockPreferenceDetailsUtils.isPasswordQualityManaged(userId, admin);
85         final boolean isLockPatternSecure = screenLockPreferenceDetailsUtils.isLockPatternSecure();
86         final int severityLevel =
87                 lockScreenAllowedByAdmin
88                         ? isLockPatternSecure
89                                 ? SafetySourceData.SEVERITY_LEVEL_INFORMATION
90                                 : SafetySourceData.SEVERITY_LEVEL_RECOMMENDATION
91                         : SafetySourceData.SEVERITY_LEVEL_UNSPECIFIED;
92 
93         final SafetySourceStatus status =
94                 new SafetySourceStatus.Builder(
95                                 context.getString(R.string.unlock_set_unlock_launch_picker_title),
96                                 lockScreenAllowedByAdmin
97                                         ? screenLockPreferenceDetailsUtils.getSummary(
98                                                 UserHandle.myUserId())
99                                         : context.getString(R.string.disabled_by_policy_title),
100                                 severityLevel)
101                         .setPendingIntent(lockScreenAllowedByAdmin ? pendingIntent : null)
102                         .setEnabled(lockScreenAllowedByAdmin)
103                         .setIconAction(lockScreenAllowedByAdmin ? gearMenuIconAction : null)
104                         .build();
105         final SafetySourceData.Builder safetySourceDataBuilder =
106                 new SafetySourceData.Builder().setStatus(status);
107         if (lockScreenAllowedByAdmin && !isLockPatternSecure) {
108             safetySourceDataBuilder.addIssue(createNoScreenLockIssue(context, pendingIntent));
109         }
110         final SafetySourceData safetySourceData = safetySourceDataBuilder.build();
111 
112         SafetyCenterManagerWrapper.get()
113                 .setSafetySourceData(context, SAFETY_SOURCE_ID, safetySourceData, safetyEvent);
114     }
115 
116     /** Notifies Safety Center of a change in lock screen settings. */
onLockScreenChange(Context context)117     public static void onLockScreenChange(Context context) {
118         setSafetySourceData(
119                 context,
120                 new ScreenLockPreferenceDetailsUtils(context),
121                 new SafetyEvent.Builder(SAFETY_EVENT_TYPE_SOURCE_STATE_CHANGED).build());
122 
123         // Also send refreshed safety center data for biometrics, since changing lockscreen settings
124         // can unset biometrics.
125         BiometricsSafetySource.onBiometricsChanged(context);
126     }
127 
createGearMenuIconAction( Context context, ScreenLockPreferenceDetailsUtils screenLockPreferenceDetailsUtils)128     private static IconAction createGearMenuIconAction(
129             Context context, ScreenLockPreferenceDetailsUtils screenLockPreferenceDetailsUtils) {
130         return screenLockPreferenceDetailsUtils.shouldShowGearMenu()
131                 ? new IconAction(
132                         IconAction.ICON_TYPE_GEAR,
133                         createPendingIntent(
134                                 context,
135                                 screenLockPreferenceDetailsUtils.getLaunchScreenLockSettingsIntent(
136                                         SettingsEnums.SAFETY_CENTER),
137                                 REQUEST_CODE_SCREEN_LOCK_SETTINGS))
138                 : null;
139     }
140 
createPendingIntent( Context context, Intent intent, int requestCode)141     private static PendingIntent createPendingIntent(
142             Context context, Intent intent, int requestCode) {
143         return PendingIntent.getActivity(
144                 context, requestCode, intent, PendingIntent.FLAG_IMMUTABLE);
145     }
146 
createNoScreenLockIssue( Context context, PendingIntent pendingIntent)147     private static SafetySourceIssue createNoScreenLockIssue(
148             Context context, PendingIntent pendingIntent) {
149         final SafetySourceIssue.Action action =
150                 new SafetySourceIssue.Action.Builder(
151                                 SET_SCREEN_LOCK_ACTION_ID,
152                                 context.getString(R.string.no_screen_lock_issue_action_label),
153                                 pendingIntent)
154                         .build();
155         // Custom notification deliberately has zero actions
156         final SafetySourceIssue.Notification customNotification =
157                 new SafetySourceIssue.Notification.Builder(
158                                 context.getString(R.string.no_screen_lock_issue_notification_title),
159                                 context.getString(R.string.no_screen_lock_issue_notification_text))
160                         .build();
161         return new SafetySourceIssue.Builder(
162                         NO_SCREEN_LOCK_ISSUE_ID,
163                         context.getString(R.string.no_screen_lock_issue_title),
164                         context.getString(R.string.no_screen_lock_issue_summary),
165                         SafetySourceData.SEVERITY_LEVEL_RECOMMENDATION,
166                         NO_SCREEN_LOCK_ISSUE_TYPE_ID)
167                 .setIssueCategory(SafetySourceIssue.ISSUE_CATEGORY_DEVICE)
168                 .addAction(action)
169                 .setIssueActionability(SafetySourceIssue.ISSUE_ACTIONABILITY_MANUAL)
170                 .setCustomNotification(customNotification)
171                 .setNotificationBehavior(SafetySourceIssue.NOTIFICATION_BEHAVIOR_DELAYED)
172                 .build();
173     }
174 }
175