src/com/android/settings/TrustAgentSettings.java

   1 /*
   2  * Copyright (C) 2014 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;
  18
  19 import android.app.admin.DevicePolicyManager;
  20 import android.content.ComponentName;
  21 import android.content.Context;
  22 import android.content.Intent;
  23 import android.content.pm.PackageManager;
  24 import android.content.pm.ResolveInfo;
  25 import android.graphics.drawable.Drawable;
  26 import android.os.Bundle;
  27 import android.os.UserHandle;
  28 import android.service.trust.TrustAgentService;
  29 import android.support.v14.preference.SwitchPreference;
  30 import android.support.v7.preference.Preference;
  31 import android.support.v7.preference.PreferenceGroup;
  32 import android.util.ArrayMap;
  33 import android.util.ArraySet;
  34
  35 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
  36 import com.android.internal.widget.LockPatternUtils;
  37 import com.android.settings.overlay.FeatureFactory;
  38 import com.android.settings.security.SecurityFeatureProvider;
  39 import com.android.settings.trustagent.TrustAgentManager;
  40 import com.android.settingslib.RestrictedLockUtils;
  41 import com.android.settingslib.RestrictedSwitchPreference;
  42
  43 import java.util.List;
  44
  45 import static com.android.settingslib.RestrictedLockUtils.EnforcedAdmin;
  46
  47 public class TrustAgentSettings extends SettingsPreferenceFragment implements
  48         Preference.OnPreferenceChangeListener {
  49     private static final String SERVICE_INTERFACE = TrustAgentService.SERVICE_INTERFACE;
  50
  51     private ArrayMap<ComponentName, AgentInfo> mAvailableAgents;
  52     private final ArraySet<ComponentName> mActiveAgents = new ArraySet<ComponentName>();
  53     private LockPatternUtils mLockPatternUtils;
  54     private DevicePolicyManager mDpm;
  55     private TrustAgentManager mTrustAgentManager;
  56
  57     public static final class AgentInfo {
  58         CharSequence label;
  59         ComponentName component; // service that implements ITrustAgent
  60         SwitchPreference preference;
  61         public Drawable icon;
  62
  63         @Override
  64         public boolean equals(Object other) {
  65             if (other instanceof AgentInfo) {
  66                 return component.equals(((AgentInfo)other).component);
  67             }
  68             return true;
  69         }
  70
  71         public int compareTo(AgentInfo other) {
  72             return component.compareTo(other.component);
  73         }
  74     }
  75
  76     @Override
  77     public int getMetricsCategory() {
  78         return MetricsEvent.TRUST_AGENT;
  79     }
  80
  81     @Override
  82     public void onCreate(Bundle icicle) {
  83         super.onCreate(icicle);
  84         mDpm = getActivity().getSystemService(DevicePolicyManager.class);
  85         mTrustAgentManager =
  86             FeatureFactory.getFactory(getActivity()).getSecurityFeatureProvider()
  87                 .getTrustAgentManager();
  88
  89         addPreferencesFromResource(R.xml.trust_agent_settings);
  90     }
  91
  92     public void onResume() {
  93         super.onResume();
  94         removePreference("dummy_preference");
  95         updateAgents();
  96     };
  97
  98     private void updateAgents() {
  99         final Context context = getActivity();
 100         if (mAvailableAgents == null) {
 101             mAvailableAgents = findAvailableTrustAgents();
 102         }
 103         if (mLockPatternUtils == null) {
 104             mLockPatternUtils = new LockPatternUtils(getActivity());
 105         }
 106         loadActiveAgents();
 107         PreferenceGroup category =
 108                 (PreferenceGroup) getPreferenceScreen().findPreference("trust_agents");
 109         category.removeAll();
 110
 111         final EnforcedAdmin admin = RestrictedLockUtils.checkIfKeyguardFeaturesDisabled(context,
 112                 DevicePolicyManager.KEYGUARD_DISABLE_TRUST_AGENTS, UserHandle.myUserId());
 113
 114         final int count = mAvailableAgents.size();
 115         for (int i = 0; i < count; i++) {
 116             AgentInfo agent = mAvailableAgents.valueAt(i);
 117             final RestrictedSwitchPreference preference =
 118                     new RestrictedSwitchPreference(getPrefContext());
 119             preference.useAdminDisabledSummary(true);
 120             agent.preference = preference;
 121             preference.setPersistent(false);
 122             preference.setTitle(agent.label);
 123             preference.setIcon(agent.icon);
 124             preference.setPersistent(false);
 125             preference.setOnPreferenceChangeListener(this);
 126             preference.setChecked(mActiveAgents.contains(agent.component));
 127
 128             if (admin != null
 129                     && mDpm.getTrustAgentConfiguration(null, agent.component) == null) {
 130                 preference.setChecked(false);
 131                 preference.setDisabledByAdmin(admin);
 132             }
 133
 134             category.addPreference(agent.preference);
 135         }
 136     }
 137
 138     private void loadActiveAgents() {
 139         List<ComponentName> activeTrustAgents = mLockPatternUtils.getEnabledTrustAgents(
 140                 UserHandle.myUserId());
 141         if (activeTrustAgents != null) {
 142             mActiveAgents.addAll(activeTrustAgents);
 143         }
 144     }
 145
 146     private void saveActiveAgents() {
 147         mLockPatternUtils.setEnabledTrustAgents(mActiveAgents,
 148                 UserHandle.myUserId());
 149     }
 150
 151     ArrayMap<ComponentName, AgentInfo> findAvailableTrustAgents() {
 152         PackageManager pm = getActivity().getPackageManager();
 153         Intent trustAgentIntent = new Intent(SERVICE_INTERFACE);
 154         List<ResolveInfo> resolveInfos = pm.queryIntentServices(trustAgentIntent,
 155                 PackageManager.GET_META_DATA);
 156
 157         ArrayMap<ComponentName, AgentInfo> agents = new ArrayMap<ComponentName, AgentInfo>();
 158         final int count = resolveInfos.size();
 159         agents.ensureCapacity(count);
 160         for (int i = 0; i < count; i++ ) {
 161             ResolveInfo resolveInfo = resolveInfos.get(i);
 162             if (resolveInfo.serviceInfo == null) {
 163                 continue;
 164             }
 165             if (!mTrustAgentManager.shouldProvideTrust(resolveInfo, pm)) {
 166                 continue;
 167             }
 168             ComponentName name = TrustAgentUtils.getComponentName(resolveInfo);
 169             AgentInfo agentInfo = new AgentInfo();
 170             agentInfo.label = resolveInfo.loadLabel(pm);
 171             agentInfo.icon = resolveInfo.loadIcon(pm);
 172             agentInfo.component = name;
 173             agents.put(name, agentInfo);
 174         }
 175         return agents;
 176     }
 177
 178     @Override
 179     public boolean onPreferenceChange(Preference preference, Object newValue) {
 180         if (preference instanceof SwitchPreference) {
 181             final int count = mAvailableAgents.size();
 182             for (int i = 0; i < count; i++) {
 183                 AgentInfo agent = mAvailableAgents.valueAt(i);
 184                 if (agent.preference == preference) {
 185                     if ((Boolean) newValue) {
 186                         if (!mActiveAgents.contains(agent.component)) {
 187                             mActiveAgents.add(agent.component);
 188                         }
 189                     } else {
 190                         mActiveAgents.remove(agent.component);
 191                     }
 192                     saveActiveAgents();
 193                     return true;
 194                 }
 195             }
 196         }
 197         return false;
 198     }
 199
 200 }