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      1 /*
      2  * Copyright (C) 2011 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.email.service;
     18 
     19 import android.app.Service;
     20 import android.app.admin.DevicePolicyManager;
     21 import android.content.ComponentName;
     22 import android.content.Context;
     23 import android.content.Intent;
     24 import android.os.IBinder;
     25 import android.os.RemoteException;
     26 
     27 import com.android.email.SecurityPolicy;
     28 import com.android.emailcommon.provider.Policy;
     29 import com.android.emailcommon.service.IPolicyService;
     30 import com.android.mail.utils.LogTag;
     31 import com.android.mail.utils.LogUtils;
     32 
     33 public class PolicyService extends Service {
     34     private static final String LOG_TAG = LogTag.getLogTag();
     35 
     36     private SecurityPolicy mSecurityPolicy;
     37     private Context mContext;
     38 
     39     private final IPolicyService.Stub mBinder = new IPolicyService.Stub() {
     40         @Override
     41         public boolean isActive(Policy policy) {
     42             try {
     43                 return mSecurityPolicy.isActive(policy);
     44             } catch (RuntimeException e) {
     45                 // Catch, log and rethrow the exception, as otherwise when the exception is
     46                 // ultimately handled, the complete stack trace is losk
     47                 LogUtils.e(LOG_TAG, e, "Exception thrown during call to SecurityPolicy#isActive");
     48                 throw e;
     49             }
     50         }
     51 
     52         @Override
     53         public void setAccountHoldFlag(long accountId, boolean newState) {
     54             SecurityPolicy.setAccountHoldFlag(mContext, accountId, newState);
     55         }
     56 
     57         @Override
     58         public void remoteWipe() {
     59             try {
     60                 mSecurityPolicy.remoteWipe();
     61             } catch (RuntimeException e) {
     62                 // Catch, log and rethrow the exception, as otherwise when the exception is
     63                 // ultimately handled, the complete stack trace is losk
     64                 LogUtils.e(LOG_TAG, e, "Exception thrown during call to SecurityPolicy#remoteWipe");
     65                 throw e;
     66             }
     67         }
     68 
     69         @Override
     70         public void setAccountPolicy(long accountId, Policy policy, String securityKey) {
     71             setAccountPolicy2(accountId, policy, securityKey, true /* notify */);
     72         }
     73 
     74         @Override
     75         public void setAccountPolicy2(long accountId, Policy policy, String securityKey,
     76                 boolean notify) {
     77             try {
     78                 mSecurityPolicy.setAccountPolicy(accountId, policy, securityKey, notify);
     79             } catch (RuntimeException e) {
     80                 // Catch, log and rethrow the exception, as otherwise when the exception is
     81                 // ultimately handled, the complete stack trace is losk
     82                 LogUtils.e(LOG_TAG, e,
     83                         "Exception thrown from call to SecurityPolicy#setAccountPolicy");
     84                 throw e;
     85             }
     86         }
     87 
     88         public boolean canDisableCamera() {
     89             // TODO: This is not a clean way to do this, but there is not currently
     90             // any api that can answer the question "will disabling the camera work?"
     91             // We need to answer this question here so that we can tell the server what
     92             // policies we are able to support, and only apply them after it confirms that
     93             // our partial support is acceptable.
     94             DevicePolicyManager dpm =
     95                     (DevicePolicyManager) mContext.getSystemService(Context.DEVICE_POLICY_SERVICE);
     96             final ComponentName adminName = new ComponentName(mContext, SecurityPolicy.PolicyAdmin.class);
     97             final boolean cameraDisabled = dpm.getCameraDisabled(adminName);
     98             if (cameraDisabled) {
     99                 // The camera is already disabled, by this admin.
    100                 // Apparently we can support disabling the camera.
    101                 return true;
    102             } else {
    103                 try {
    104                     dpm.setCameraDisabled(adminName, true);
    105                     dpm.setCameraDisabled(adminName, false);
    106                 } catch (SecurityException e) {
    107                     // Apparently we cannot support disabling the camera.
    108                     LogUtils.w(LOG_TAG, "SecurityException checking camera disabling.");
    109                     return false;
    110                 }
    111             }
    112             return true;
    113         }
    114 
    115     };
    116 
    117     @Override
    118     public IBinder onBind(Intent intent) {
    119         // When we bind this service, save the context and SecurityPolicy singleton
    120         mContext = this;
    121         mSecurityPolicy = SecurityPolicy.getInstance(this);
    122         return mBinder;
    123     }
    124 }