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/*
* Copyright (C) 2018 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.trustagent;
import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
import android.app.admin.DevicePolicyManager;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.graphics.drawable.Drawable;
import android.os.UserHandle;
import android.service.trust.TrustAgentService;
import android.text.TextUtils;
import android.util.ArrayMap;
import android.util.ArraySet;
import android.util.IconDrawableFactory;
import androidx.preference.Preference;
import androidx.preference.PreferenceScreen;
import androidx.preference.SwitchPreference;
import com.android.internal.widget.LockPatternUtils;
import com.android.settings.core.BasePreferenceController;
import com.android.settings.overlay.FeatureFactory;
import com.android.settings.security.SecurityFeatureProvider;
import com.android.settingslib.RestrictedLockUtils;
import com.android.settingslib.RestrictedSwitchPreference;
import com.android.settingslib.core.lifecycle.LifecycleObserver;
import com.android.settingslib.core.lifecycle.events.OnStart;
import java.util.List;
public class TrustAgentsPreferenceController extends BasePreferenceController
implements Preference.OnPreferenceChangeListener, LifecycleObserver, OnStart {
private static final Intent TRUST_AGENT_INTENT =
new Intent(TrustAgentService.SERVICE_INTERFACE);
private final ArrayMap<ComponentName, TrustAgentInfo> mAvailableAgents;
private final ArraySet<ComponentName> mActiveAgents;
private final DevicePolicyManager mDevicePolicyManager;
private final IconDrawableFactory mIconDrawableFactory;
private final LockPatternUtils mLockPatternUtils;
private final PackageManager mPackageManager;
private final TrustAgentManager mTrustAgentManager;
private PreferenceScreen mScreen;
public TrustAgentsPreferenceController(Context context, String key) {
super(context, key);
mAvailableAgents = new ArrayMap<>();
mActiveAgents = new ArraySet<>();
mDevicePolicyManager = context.getSystemService(DevicePolicyManager.class);
mIconDrawableFactory = IconDrawableFactory.newInstance(context);
final SecurityFeatureProvider securityFeatureProvider =
FeatureFactory.getFactory(context).getSecurityFeatureProvider();
mTrustAgentManager = securityFeatureProvider.getTrustAgentManager();
mLockPatternUtils = securityFeatureProvider.getLockPatternUtils(context);
mPackageManager = context.getPackageManager();
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
mScreen = screen;
}
@Override
public int getAvailabilityStatus() {
return AVAILABLE;
}
@Override
public void onStart() {
updateAgents();
}
private void updateAgents() {
findAvailableTrustAgents();
loadActiveAgents();
removeUselessExistingPreferences();
final EnforcedAdmin admin = RestrictedLockUtils.checkIfKeyguardFeaturesDisabled(mContext,
DevicePolicyManager.KEYGUARD_DISABLE_TRUST_AGENTS, UserHandle.myUserId());
for (TrustAgentInfo agent : mAvailableAgents.values()) {
final ComponentName componentName = agent.getComponentName();
RestrictedSwitchPreference preference = (RestrictedSwitchPreference)
mScreen.findPreference(componentName.flattenToString());
if (preference == null) {
preference = new RestrictedSwitchPreference(mScreen.getContext());
}
preference.setKey(componentName.flattenToString());
preference.useAdminDisabledSummary(true);
preference.setTitle(agent.getLabel());
preference.setIcon(agent.getIcon());
preference.setOnPreferenceChangeListener(this);
preference.setChecked(mActiveAgents.contains(componentName));
if (admin != null && mDevicePolicyManager.getTrustAgentConfiguration(null /* admin */,
componentName) == null) {
preference.setChecked(false);
preference.setDisabledByAdmin(admin);
}
mScreen.addPreference(preference);
}
}
private void loadActiveAgents() {
final List<ComponentName> activeTrustAgents = mLockPatternUtils.getEnabledTrustAgents(
UserHandle.myUserId());
if (activeTrustAgents != null) {
mActiveAgents.addAll(activeTrustAgents);
}
}
private void saveActiveAgents() {
mLockPatternUtils.setEnabledTrustAgents(mActiveAgents, UserHandle.myUserId());
}
private void findAvailableTrustAgents() {
final List<ResolveInfo> resolveInfos = mPackageManager.queryIntentServices(
TRUST_AGENT_INTENT, PackageManager.GET_META_DATA);
mAvailableAgents.clear();
for (ResolveInfo resolveInfo : resolveInfos) {
if (resolveInfo.serviceInfo == null) {
continue;
}
if (!mTrustAgentManager.shouldProvideTrust(resolveInfo, mPackageManager)) {
continue;
}
final CharSequence label = resolveInfo.loadLabel(mPackageManager);
final ComponentName componentName = mTrustAgentManager.getComponentName(resolveInfo);
final Drawable icon = mIconDrawableFactory.getBadgedIcon(
resolveInfo.getComponentInfo().applicationInfo);
final TrustAgentInfo agentInfo = new TrustAgentInfo(label, componentName, icon);
mAvailableAgents.put(componentName, agentInfo);
}
}
private void removeUselessExistingPreferences() {
final int count = mScreen.getPreferenceCount();
if (count <= 0) {
return;
}
for (int i = count - 1; i >= 0; i--) {
final Preference pref = mScreen.getPreference(i);
final String[] names = TextUtils.split(pref.getKey(), "/");
final ComponentName componentName = new ComponentName(names[0], names[1]);
if (!mAvailableAgents.containsKey(componentName)) {
mScreen.removePreference(pref);
mActiveAgents.remove(componentName);
}
}
}
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
if (!(preference instanceof SwitchPreference)) {
return false;
}
for (TrustAgentInfo agent : mAvailableAgents.values()) {
final ComponentName componentName = agent.getComponentName();
if (!TextUtils.equals(preference.getKey(), componentName.flattenToString())) {
continue;
}
if ((Boolean) newValue && !mActiveAgents.contains(componentName)) {
mActiveAgents.add(componentName);
} else {
mActiveAgents.remove(componentName);
}
saveActiveAgents();
return true;
}
return false;
}
}
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