1 /* 2 * Copyright (C) 2022 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.permissioncontroller.permission.model.livedatatypes.v31 18 19 import android.app.AppOpsManager.OP_FLAG_SELF 20 import android.app.AppOpsManager.OP_FLAG_TRUSTED_PROXIED 21 import android.app.AppOpsManager.OP_FLAG_TRUSTED_PROXY 22 import android.app.AppOpsManager.PackageOps 23 import android.os.UserHandle 24 import com.android.permissioncontroller.permission.utils.PermissionMapping.getPlatformPermissionGroupForOp 25 26 /** 27 * Light version of [PackageOps] class, tracking the last permission access for system permission 28 * groups. 29 */ 30 data class LightPackageOps( 31 /** Name of the package. */ 32 val packageName: String, 33 /** [UserHandle] running the package. */ 34 val userHandle: UserHandle, 35 /** 36 * Mapping of permission group name to the last access time of any op backing a permission in 37 * the group. 38 */ 39 val lastPermissionGroupAccessTimesMs: Map<String, Long> 40 ) { 41 constructor( 42 ops: Set<String>, 43 packageOps: PackageOps 44 ) : this( 45 packageOps.packageName, 46 UserHandle.getUserHandleForUid(packageOps.uid), 47 createLastPermissionGroupAccessTimesMap(ops, packageOps)) 48 49 /** Companion object for [LightPackageOps]. */ 50 companion object { 51 /** Flags to use for querying an op's last access time. */ 52 private const val OPS_LAST_ACCESS_FLAGS = 53 OP_FLAG_SELF or OP_FLAG_TRUSTED_PROXIED or OP_FLAG_TRUSTED_PROXY 54 55 /** Creates a mapping from permission group to the last time it was accessed. */ createLastPermissionGroupAccessTimesMapnull56 private fun createLastPermissionGroupAccessTimesMap( 57 opNames: Set<String>, 58 packageOps: PackageOps 59 ): Map<String, Long> { 60 val lastAccessTimeMs = mutableMapOf<String, Long>() 61 // Add keys for all permissions groups covered by the provided ops, regardless of 62 // whether they have been observed recently. 63 for (permissionGroup in 64 opNames.mapNotNull { getPlatformPermissionGroupForOp(it) }.toSet()) { 65 lastAccessTimeMs[permissionGroup] = -1 66 } 67 68 for (opEntry in packageOps.ops) { 69 val permissionGroupOfOp = getPlatformPermissionGroupForOp(opEntry.opStr) ?: continue 70 lastAccessTimeMs[permissionGroupOfOp] = 71 maxOf( 72 lastAccessTimeMs[permissionGroupOfOp] ?: -1, 73 opEntry.getLastAccessTime(OPS_LAST_ACCESS_FLAGS)) 74 } 75 76 return lastAccessTimeMs 77 } 78 } 79 } 80