DivestOS/Patches/LineageOS-21.0/android_packages_apps_Settings/0012-hosts_toggle.patch

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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Tad <tad@spotco.us>
Date: Wed, 20 Apr 2022 01:04:27 -0400
Subject: [PATCH] Add a toggle to disable /etc/hosts lookup
Copy and pasted from the GrapheneOS exec spawning toggle patch
Signed-off-by: Tad <tad@spotco.us>
Change-Id: Ic01a142722372d9d57f52947025cd9db23e58ef4
---
res/values/strings.xml | 3 +
res/xml/security_dashboard_settings.xml | 6 +
.../security/HostsPreferenceController.java | 106 ++++++++++++++++++
.../settings/security/SecuritySettings.java | 1 +
4 files changed, 116 insertions(+)
create mode 100644 src/com/android/settings/security/HostsPreferenceController.java
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 2905e96d006..1ad831e1b7e 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -674,6 +674,9 @@
<string name="native_debug_title">Enable native code debugging</string>
<string name="native_debug_summary">Generate useful logs / bug reports from crashes and permit debugging native code.</string>
+ <string name="hosts_disable_title">Disable DNS content blocker</string>
+ <string name="hosts_disable_summary">Disables use of the included /etc/hosts database for data collection and malware blocking.</string>
+
<!-- Text shown for summary of owner info setting (if none set) [CHAR LIMIT=40]-->
<string name="owner_info_settings_summary">None</string>
<!-- Hint text shown in owner info edit text [CHAR LIMIT=50] -->
diff --git a/res/xml/security_dashboard_settings.xml b/res/xml/security_dashboard_settings.xml
index 3a062884976..db158b72433 100644
--- a/res/xml/security_dashboard_settings.xml
+++ b/res/xml/security_dashboard_settings.xml
@@ -80,6 +80,12 @@
android:title="@string/native_debug_title"
android:summary="@string/native_debug_summary"
android:persistent="false" />
+
+ <SwitchPreference
+ android:key="hosts_disable"
+ android:title="@string/hosts_disable_title"
+ android:summary="@string/hosts_disable_summary"
+ android:persistent="false" />
</PreferenceCategory>
<Preference
diff --git a/src/com/android/settings/security/HostsPreferenceController.java b/src/com/android/settings/security/HostsPreferenceController.java
new file mode 100644
index 00000000000..d8af6d26490
--- /dev/null
+++ b/src/com/android/settings/security/HostsPreferenceController.java
@@ -0,0 +1,106 @@
+/*
+ * Copyright (C) 2022 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License
+ */
+
+package com.android.settings.security;
+
+import android.content.Context;
+
+import android.os.UserHandle;
+import android.os.UserManager;
+import android.os.SystemProperties;
+
+import android.provider.Settings;
+
+import androidx.preference.Preference;
+import androidx.preference.PreferenceCategory;
+import androidx.preference.PreferenceGroup;
+import androidx.preference.PreferenceScreen;
+import androidx.preference.TwoStatePreference;
+import androidx.preference.SwitchPreference;
+
+import com.android.internal.widget.LockPatternUtils;
+import com.android.settings.core.PreferenceControllerMixin;
+import com.android.settingslib.core.AbstractPreferenceController;
+import com.android.settingslib.core.lifecycle.events.OnResume;
+
+public class HostsPreferenceController extends AbstractPreferenceController
+ implements PreferenceControllerMixin, OnResume, Preference.OnPreferenceChangeListener {
+
+ private static final String SYS_KEY_HOSTS_DISABLE = "persist.security.hosts_disable";
+ private static final String PREF_KEY_HOSTS_DISABLE = "hosts_disable";
+ private static final String PREF_KEY_SECURITY_CATEGORY = "security_category";
+
+ private PreferenceCategory mSecurityCategory;
+ private SwitchPreference mHostsDisable;
+ private boolean mIsAdmin;
+ private UserManager mUm;
+
+ public HostsPreferenceController(Context context) {
+ super(context);
+ mUm = UserManager.get(context);
+ }
+
+ @Override
+ public void displayPreference(PreferenceScreen screen) {
+ super.displayPreference(screen);
+ mSecurityCategory = screen.findPreference(PREF_KEY_SECURITY_CATEGORY);
+ updatePreferenceState();
+ }
+
+ @Override
+ public boolean isAvailable() {
+ mIsAdmin = mUm.isAdminUser();
+ return mIsAdmin;
+ }
+
+ @Override
+ public String getPreferenceKey() {
+ return PREF_KEY_HOSTS_DISABLE;
+ }
+
+ // TODO: should we use onCreatePreferences() instead?
+ private void updatePreferenceState() {
+ if (mSecurityCategory == null) {
+ return;
+ }
+
+ if (mIsAdmin) {
+ mHostsDisable = (SwitchPreference) mSecurityCategory.findPreference(PREF_KEY_HOSTS_DISABLE);
+ mHostsDisable.setChecked(SystemProperties.getInt(SYS_KEY_HOSTS_DISABLE, 0) == 1);
+ } else {
+ mSecurityCategory.removePreference(mSecurityCategory.findPreference(PREF_KEY_HOSTS_DISABLE));
+ }
+ }
+
+ @Override
+ public void onResume() {
+ updatePreferenceState();
+ if (mHostsDisable != null) {
+ boolean mode = mHostsDisable.isChecked();
+ SystemProperties.set(SYS_KEY_HOSTS_DISABLE, mode ? "1" : "0");
+ }
+ }
+
+ @Override
+ public boolean onPreferenceChange(Preference preference, Object value) {
+ final String key = preference.getKey();
+ if (PREF_KEY_HOSTS_DISABLE.equals(key)) {
+ final boolean mode = !mHostsDisable.isChecked();
+ SystemProperties.set(SYS_KEY_HOSTS_DISABLE, mode ? "1" : "0");
+ }
+ return true;
+ }
+}
diff --git a/src/com/android/settings/security/SecuritySettings.java b/src/com/android/settings/security/SecuritySettings.java
index 4c6e1c99815..8079cd5067d 100644
--- a/src/com/android/settings/security/SecuritySettings.java
+++ b/src/com/android/settings/security/SecuritySettings.java
@@ -108,6 +108,7 @@ public class SecuritySettings extends DashboardFragment {
securityPreferenceControllers.add(new AutoRebootPreferenceController(context));
securityPreferenceControllers.add(new ExecSpawnPreferenceController(context));
securityPreferenceControllers.add(new NativeDebugPreferenceController(context));
+ securityPreferenceControllers.add(new HostsPreferenceController(context));
controllers.add(new PreferenceCategoryController(context, SECURITY_CATEGORY)
.setChildren(securityPreferenceControllers));
controllers.addAll(securityPreferenceControllers);