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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.settings.security.SecuritySettings.CHANGE_TRUST_AGENT_SETTINGS;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.os.UserHandle;
import android.support.annotation.VisibleForTesting;
import android.support.v7.preference.Preference;
import android.support.v7.preference.PreferenceCategory;
import android.support.v7.preference.PreferenceScreen;
import android.text.TextUtils;
import com.android.internal.widget.LockPatternUtils;
import com.android.settings.R;
import com.android.settings.core.PreferenceControllerMixin;
import com.android.settings.overlay.FeatureFactory;
import com.android.settings.password.ChooseLockSettingsHelper;
import com.android.settings.security.SecurityFeatureProvider;
import com.android.settings.security.SecuritySettings;
import com.android.settingslib.RestrictedPreference;
import com.android.settingslib.core.AbstractPreferenceController;
import com.android.settingslib.core.lifecycle.Lifecycle;
import com.android.settingslib.core.lifecycle.LifecycleObserver;
import com.android.settingslib.core.lifecycle.events.OnCreate;
import com.android.settingslib.core.lifecycle.events.OnResume;
import com.android.settingslib.core.lifecycle.events.OnSaveInstanceState;
import java.util.List;
public class TrustAgentListPreferenceController extends AbstractPreferenceController
implements PreferenceControllerMixin, LifecycleObserver, OnSaveInstanceState,
OnCreate, OnResume {
private static final String TRUST_AGENT_CLICK_INTENT = "trust_agent_click_intent";
@VisibleForTesting
static final String PREF_KEY_TRUST_AGENT = "trust_agent";
@VisibleForTesting
static final String PREF_KEY_SECURITY_CATEGORY = "security_category";
private static final int MY_USER_ID = UserHandle.myUserId();
private final LockPatternUtils mLockPatternUtils;
private final TrustAgentManager mTrustAgentManager;
private final SecuritySettings mHost;
private Intent mTrustAgentClickIntent;
private PreferenceCategory mSecurityCategory;
public TrustAgentListPreferenceController(Context context, SecuritySettings host,
Lifecycle lifecycle) {
super(context);
final SecurityFeatureProvider provider = FeatureFactory.getFactory(context)
.getSecurityFeatureProvider();
mHost = host;
mLockPatternUtils = provider.getLockPatternUtils(context);
mTrustAgentManager = provider.getTrustAgentManager();
if (lifecycle != null) {
lifecycle.addObserver(this);
}
}
@Override
public boolean isAvailable() {
return mContext.getResources().getBoolean(R.bool.config_show_trust_agent_click_intent);
}
@Override
public String getPreferenceKey() {
return PREF_KEY_TRUST_AGENT;
}
@Override
public void displayPreference(PreferenceScreen screen) {
super.displayPreference(screen);
mSecurityCategory = (PreferenceCategory) screen.findPreference(PREF_KEY_SECURITY_CATEGORY);
updateTrustAgents();
}
@Override
public void onCreate(Bundle savedInstanceState) {
if (savedInstanceState != null
&& savedInstanceState.containsKey(TRUST_AGENT_CLICK_INTENT)) {
mTrustAgentClickIntent = savedInstanceState.getParcelable(TRUST_AGENT_CLICK_INTENT);
}
}
@Override
public void onSaveInstanceState(Bundle outState) {
if (mTrustAgentClickIntent != null) {
outState.putParcelable(TRUST_AGENT_CLICK_INTENT, mTrustAgentClickIntent);
}
}
@Override
public boolean handlePreferenceTreeClick(Preference preference) {
if (!TextUtils.equals(preference.getKey(), getPreferenceKey())) {
return super.handlePreferenceTreeClick(preference);
}
final ChooseLockSettingsHelper helper = new ChooseLockSettingsHelper(
mHost.getActivity(), mHost);
mTrustAgentClickIntent = preference.getIntent();
boolean confirmationLaunched = helper.launchConfirmationActivity(
CHANGE_TRUST_AGENT_SETTINGS, preference.getTitle());
if (!confirmationLaunched && mTrustAgentClickIntent != null) {
// If this returns false, it means no password confirmation is required.
mHost.startActivity(mTrustAgentClickIntent);
mTrustAgentClickIntent = null;
}
return true;
}
@Override
public void onResume() {
updateTrustAgents();
}
private void updateTrustAgents() {
if (mSecurityCategory == null) {
return;
}
// First remove all old trust agents.
while (true) {
final Preference oldAgent = mSecurityCategory.findPreference(PREF_KEY_TRUST_AGENT);
if (oldAgent == null) {
break;
} else {
mSecurityCategory.removePreference(oldAgent);
}
}
// If for some reason the preference is no longer available, don't proceed to add.
if (!isAvailable()) {
return;
}
// Then add new ones.
final boolean hasSecurity = mLockPatternUtils.isSecure(MY_USER_ID);
final List<TrustAgentManager.TrustAgentComponentInfo> agents =
mTrustAgentManager.getActiveTrustAgents(mContext, mLockPatternUtils);
if (agents == null) {
return;
}
for (TrustAgentManager.TrustAgentComponentInfo agent : agents) {
final RestrictedPreference trustAgentPreference =
new RestrictedPreference(mSecurityCategory.getContext());
trustAgentPreference.setKey(PREF_KEY_TRUST_AGENT);
trustAgentPreference.setTitle(agent.title);
trustAgentPreference.setSummary(agent.summary);
// Create intent for this preference.
trustAgentPreference.setIntent(new Intent(Intent.ACTION_MAIN)
.setComponent(agent.componentName));
trustAgentPreference.setDisabledByAdmin(agent.admin);
if (!trustAgentPreference.isDisabledByAdmin() && !hasSecurity) {
trustAgentPreference.setEnabled(false);
trustAgentPreference.setSummary(R.string.disabled_because_no_backup_security);
}
// Add preference to the settings menu.
mSecurityCategory.addPreference(trustAgentPreference);
}
}
public boolean handleActivityResult(int requestCode, int resultCode) {
if (requestCode == CHANGE_TRUST_AGENT_SETTINGS && resultCode == Activity.RESULT_OK) {
if (mTrustAgentClickIntent != null) {
mHost.startActivity(mTrustAgentClickIntent);
mTrustAgentClickIntent = null;
}
return true;
}
return false;
}
}
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