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      1 /*
      2  * Copyright (C) 2015 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.permissionutils;
     18 
     19 import android.app.Activity;
     20 import android.app.Instrumentation;
     21 import android.content.pm.PackageInfo;
     22 import android.content.pm.PackageManager;
     23 import android.content.pm.PermissionInfo;
     24 import android.content.pm.PackageManager.NameNotFoundException;
     25 import android.os.Bundle;
     26 import android.os.UserHandle;
     27 import android.util.Log;
     28 
     29 import java.util.ArrayList;
     30 import java.util.List;
     31 
     32 /**
     33  * A utility to dump or grant all revoked runtime permissions
     34  */
     35 public class PermissionInstrumentation extends Instrumentation {
     36 
     37     private static final String DUMP_TAG = "DUMP";
     38     private static final String PARAM_COMMAND = "command";
     39     private static final String COMMAND_DUMP = "dump";
     40     private static final String COMMAND_GRANTALL = "grant-all";
     41 
     42     private static enum Action {DUMP, GRANTALL};
     43 
     44     @Override
     45     public void onCreate(Bundle arguments) {
     46         super.onCreate(arguments);
     47         String command = arguments.getString(PARAM_COMMAND);
     48         if (command == null) {
     49             throw new IllegalArgumentException("missing command parameter");
     50         }
     51         if (COMMAND_DUMP.equals(command)) {
     52             runCommand(Action.DUMP);
     53         } else if (COMMAND_GRANTALL.equals(command)) {
     54             runCommand(Action.GRANTALL);
     55         } else {
     56             throw new IllegalArgumentException(
     57                     String.format("unrecognized command \"%s\"", command));
     58         }
     59         finish(Activity.RESULT_OK, new Bundle());
     60     }
     61 
     62     private void runCommand(Action action) {
     63         PackageManager pm = getContext().getPackageManager();
     64         List<PackageInfo> pkgInfos = pm.getInstalledPackages(PackageManager.GET_PERMISSIONS);
     65         List<String> permissions = new ArrayList<>();
     66         for (PackageInfo info : pkgInfos) {
     67             if (info.requestedPermissions == null) {
     68                 continue;
     69             }
     70             for (String permission : info.requestedPermissions) {
     71                 PermissionInfo pi = null;
     72                 try {
     73                     pi = pm.getPermissionInfo(permission, 0);
     74                 } catch (NameNotFoundException nnfe) {
     75                     // ignore
     76                 }
     77                 if (pi == null) {
     78                     continue;
     79                 }
     80                 if (!isRuntime(pi)) {
     81                     continue;
     82                 }
     83                 int flag = pm.checkPermission(permission, info.packageName);
     84                 if (flag == PackageManager.PERMISSION_DENIED) {
     85                     if (action == Action.DUMP) {
     86                         permissions.add(permission);
     87                     } else if (action == Action.GRANTALL) {
     88                         pm.grantRuntimePermission(info.packageName, permission, UserHandle.OWNER);
     89                     }
     90                 }
     91             }
     92             if (action == Action.DUMP && !permissions.isEmpty()) {
     93                 Log.e(DUMP_TAG, String.format("Revoked permissions for %s", info.packageName));
     94                 for (String permission : permissions) {
     95                     Log.e(DUMP_TAG, "    " + permission);
     96                 }
     97                 permissions.clear();
     98             }
     99         }
    100     }
    101 
    102     private boolean isRuntime(PermissionInfo pi) {
    103         return (pi.protectionLevel & PermissionInfo.PROTECTION_MASK_BASE)
    104                 == PermissionInfo.PROTECTION_DANGEROUS;
    105     }
    106 }
    107